CN217502127U - Quick Drive Device and Hydraulic Operating Mechanism of Hydraulic Control Valve - Google Patents

Abstract

The utility model relates to a fast driving device of a hydraulic control valve and a hydraulic operating mechanism. The fast driving device of the hydraulic control valve comprises a pull rod on a mounting seat which is guided and moved in the front and rear directions, and the pull rod is used to push the hydraulic control valve forward. The spool of the pilot valve is used to open the pilot valve, and the quick drive device also includes a rubber buffer and a return spring; a striker head is fixedly installed on the draw rod, and the striker head is used to strike the draw rod when the draw rod moves forward in place. The rubber buffer is used to buffer the impact of the pull rod on the pilot valve spool; the return spring is used to apply a backward restoring elastic force to the pull rod to force the pull rod to return to a corresponding initial position. The fast driving device of the hydraulic control valve provided by the utility model effectively solves the technical problem that the large elastic modulus of the return spring easily affects the fast closing effect of the hydraulic operating mechanism.

Description

Quick Drive Device and Hydraulic Operating Mechanism of Hydraulic Control Valve

technical field

The utility model belongs to the technical field of hydraulic control valves, in particular to a fast driving device and a hydraulic operating mechanism of a hydraulic control valve.

Background technique

The hydraulic operating mechanism is widely used in high-voltage circuit breakers. In the hydraulic operating mechanism, the hydraulic control valve is the part that the mechanism receives and converts the control signal, which not only determines the opening and closing positions of the hydraulic operating mechanism, but also greatly affects the The influence of the opening and closing speed of the hydraulic operating mechanism.

At present, the hydraulic control valve is mostly driven by the electromagnet and the repulsion mechanism to open the pilot valve. For example, the Chinese invention patent application publication number CN112443526A provides a circuit breaker, a hydraulic control valve and a hydraulic operating mechanism, as shown in Figure 1 , The hydraulic control valve of the invention includes a repulsion mechanism, which acts as a fast driving device for the hydraulic control valve. When the pilot valve is to be opened, the electromagnet coil 2 is charged, and the switch K is closed at the same time, and the power supply capacitor C is energized to the repulsion coil 5. The change of the current will generate a reverse induced current in the repulsion disc 4, and a huge repulsive force will be generated between the repulsion coil 5 and the repulsion disc 4, which will push the repulsion disc 4 to move in the direction of the pilot valve, and the repulsion disc 4 will push the moving iron core 1. Movement opens the pilot valve. At this time, the return spring is in a compressed state under the push of the stop plate 6. When the repulsion force between the repulsion coil 5 and the repulsion plate 4 subsides, the electromagnetic coil 2 is used to provide a magnetic force, so that the moving iron core 1 keeps acting to push the pilot. The valve core is opened. During this process, the return spring 3 stores elastic potential energy under the top pressure of the stop plate 6, so as to quickly drive the movable iron core 1 to reset when it needs to be reset.

When the above-mentioned repulsion mechanism is actually used, the repulsion between the repulsion disc 4 and the repulsion coil 5 is relatively large. In order to ensure effective buffering, a return spring 3 with a larger elastic modulus needs to be used to balance the tension between the pull rod 1 and the pilot valve spool. impact force, but using the return spring 3 with a larger elastic modulus will cause the initial acceleration of the moving iron core 1 to be slow during closing, which will reduce the acceleration effect of the repulsion disc 4 and affect the rapid closing effect of the hydraulic operating mechanism.

Utility model content

The purpose of the utility model is to provide a fast driving device for a hydraulic control valve, so as to solve the problem that the large elastic modulus of the return spring corresponding to the repulsion disc and the electromagnetic coil in the prior art easily affects the fast closing effect of the hydraulic operating mechanism technical issues. At the same time, the utility model also provides a hydraulic operating mechanism using the fast driving device of the hydraulic control valve.

In order to achieve the above purpose, the technical scheme of the quick drive device of a hydraulic control valve provided by the present utility model is:

The quick drive device of the hydraulic control valve includes a mounting seat, which is guided and moved in the front-rear direction and is equipped with a pull rod, which is used to push the pilot valve spool of the hydraulic control valve forward to open the pilot valve, the pull rod It includes a moving iron core or the pull rod is a moving iron core; the mounting seat is also equipped with an electromagnet coil for applying a driving force to the moving iron core, so as to drive the pull rod to move forward from the initial position; fast driving The device further comprises a repulsion mechanism, the repulsion mechanism comprises a repulsion disc and a repulsion coil, the repulsion disc is fixedly mounted on the draw rod, and is used for applying a driving force to the draw rod to drive the draw rod to move forward from the initial position; The quick drive device also includes a rubber buffer and a return spring; the rubber buffer is mounted on the mounting seat or is fixedly arranged relative to the mounting seat, and a striker is fixedly installed on the pull rod, and the striker is used for When the pull rod moves forward, it hits the rubber buffer, so as to buffer the impact of the pull rod on the pilot valve core; the return spring is used to apply a backward restoring elastic force to the pull rod to force the pull rod to return to the corresponding initial position.

The beneficial effects are: the fast driving device of the hydraulic control valve provided by the utility model, under the driving of the repulsion mechanism and the electromagnet coil, the pull rod moves forward rapidly, the impact head on the pull rod compresses the return spring, and pushes the pilot valve at the front end of the pull rod Before the valve core, the impact head hits the rubber buffer, which greatly reduces the impact of the tie rod on the pilot valve core. At the same time, the return spring completes energy storage during compression, and after the pull rod completes its work, the pull rod returns to the corresponding initial position under the restoring elastic force provided by the return spring. Although the return spring plays a certain buffering role in the compression process, the rubber buffer plays the main buffering role, so that a spring with a smaller elastic modulus can be selected when the return spring is selected, so that it can provide the return elastic force for the pull rod. That is, in this way, driven by the repulsion mechanism and the electromagnet coil, when the pull rod moves forward, the resistance provided by the reset compression spring with a small elastic modulus is also small, which makes the quick closing effect of the hydraulic control valve better and more remarkable.

As a further improvement, the rubber buffer member is a buffer cylinder, and the buffer cylinder is coaxially sleeved on the outside of the pull rod.

The beneficial effects are: the rubber buffer is a buffer cylinder, which is designed to facilitate installation and improve assembly efficiency.

As a further improvement, the buffer cylinder is located on the front side of the impact head, and the rear end of the buffer cylinder is provided with a rear baffle for the impact head to directly strike, so that the impact head strikes the rubber buffer, The tailgate is guided and fitted on the mounting seat in the front-rear direction.

The beneficial effects are: the rear end of the buffer cylinder is provided with a rear baffle. When the impact head hits the buffer cylinder, the rear baffle and the impact head directly collide, which protects the buffer cylinder and prolongs the service life of the equipment.

As a further improvement, the tailgate is guided and mounted on the mounting seat along the front-rear direction by a guide rod. Among the tailgate and the mounting seat, one of them is fixedly assembled with the guide rod, and the other is fixedly assembled with the guide rod. It is guided and slidably assembled with the guide rod.

The beneficial effect is: the rear baffle is guided and installed on the mounting seat along the front and rear directions by the guide rod, so that the design can make the rear baffle and the mounting seat can slide relative to each other. When the impact head hits the buffer cylinder, the buffer cylinder is compressed and deformed , the rear baffle can move synchronously with the buffer cylinder to ensure the buffer effect.

As a further improvement, the rear baffle is provided with a rear central hole, and a rear convex ring is arranged at the hole edge of the rear central hole, and the rear convex ring is arranged to protrude forward and is positioned with the inner hole of the buffer cylinder. mating, and then positioning and assembling with the buffer cylinder.

The beneficial effect is that the rear baffle is provided with a rear convex ring, which is designed to facilitate the positioning of the buffer cylinder during installation and ensure the stability of the buffer cylinder.

As a further improvement, the rear side of the mounting seat is provided with a front baffle correspondingly, the front end of the buffer cylinder is press-fitted with the front baffle, the front baffle is provided with a front center hole, and the front A front convex ring is arranged at the hole edge of the central hole, and the front convex ring is arranged to protrude rearward and is used for guiding, positioning and installing the return spring.

The beneficial effects are: the rear side of the mounting seat is correspondingly provided with a front baffle, the front baffle is provided with a front convex ring, the separate design of the mounting seat and the front baffle is for the convenience of processing, and the front baffle is provided with a front convex ring, It is to facilitate the installation of the return spring, and at the same time, it has a guiding effect on the return spring when the return spring is compressed.

As a further improvement, the return spring is a return pressure spring, the return pressure spring is located in the buffer cylinder and is sleeved outside the pull rod, the front end of the return pressure spring is push-fitted with the mounting seat, and the rear end is in a push fit with the mounting seat. Impact head push fit.

The beneficial effects are as follows: the reset spring is a reset compression spring, which is convenient to be sheathed outside the pull rod and arranged in the buffer cylinder, which is not only convenient for assembly, but also can effectively prevent the reset compression spring from being affected.

As a further improvement, a front limit plate and a rear limit plate are provided corresponding to the draw rod, the front limit plate is located on the front side of the repulsion disc, and the front limit plate is used for moving the draw rod forward When moving in place, it cooperates with the repulsion disc to stop and limit; the rear limit plate is located on the rear side of the impact head, and the rear limit plate is used to cooperate with the impact when the pull rod returns to the initial position. Head stop limit fit.

The beneficial effects are: the design of the front limit plate and the rear limit plate can further limit the pull rod when it moves forward or returns to the original position, which ensures the accuracy and stability of the device.

As a further improvement, at least one of the front limit plate and the rear limit plate is a polytetrafluoroethylene plate.

The beneficial effects are: the polytetrafluoroethylene plate has excellent wear resistance and electrical insulation.

The technical scheme of the hydraulic operating mechanism provided by the utility model is:

The hydraulic operating mechanism includes a hydraulic control valve, the hydraulic control valve includes a pilot valve and a quick drive device, the pilot valve has a pilot valve spool, and the quick drive device is used to push the pilot valve spool to move forward to open the pilot valve; the The quick drive device of the hydraulic control valve includes a mounting seat, on which the mounting seat is guided and moved in the front-rear direction and is equipped with a pull rod, the pull rod is used to push the pilot valve spool of the hydraulic control valve forward to open the pilot valve, and the pull rod includes The moving iron core or the pull rod is a moving iron core; the mounting seat is also equipped with an electromagnet coil for applying a driving force to the moving iron core, so as to drive the pull rod to move forward from the initial position; a quick drive device Also includes a repulsion mechanism, the repulsion mechanism includes a repulsion disc and a repulsion coil, the repulsion disc is fixedly mounted on the pull rod, and is used to apply a driving force to the pull rod to drive the pull rod to move forward from the initial position; fast The driving device also includes a rubber buffer and a return spring; the rubber buffer is mounted on the mounting seat or is fixedly arranged relative to the mounting seat, and a striker is fixedly installed on the pull rod, and the striker is used for When the pull rod moves forward, it hits the rubber buffer to buffer the impact of the pull rod on the pilot valve spool; the return spring is used to apply a backward restoring elastic force to the pull rod to Force the lever to return to the corresponding initial position.

The beneficial effects are: the fast driving device of the hydraulic control valve provided by the utility model, under the driving of the repulsion mechanism and the electromagnet coil, the pull rod moves forward rapidly, the impact head on the pull rod compresses the return spring, and pushes the pilot valve at the front end of the pull rod Before the valve core, the impact head hits the rubber buffer, which greatly reduces the impact of the tie rod on the pilot valve core. At the same time, the return spring completes energy storage during compression, and after the pull rod completes its work, the pull rod returns to the corresponding initial position under the restoring elastic force provided by the return spring. Although the return spring plays a certain buffering role in the compression process, the rubber buffer plays the main buffering role, so that a spring with a smaller elastic modulus can be selected when the return spring is selected, so that it can provide the return elastic force for the pull rod. That is, in this way, driven by the repulsion mechanism and the electromagnet coil, when the pull rod moves forward, the resistance provided by the reset compression spring with a small elastic modulus is also small, which makes the quick closing effect of the hydraulic control valve better and more remarkable.

As a further improvement, the rubber buffer member is a buffer cylinder, and the buffer cylinder is coaxially sleeved on the outside of the pull rod.

The beneficial effects are: the rubber buffer is a buffer cylinder, which is designed to facilitate installation and improve assembly efficiency.

As a further improvement, the buffer cylinder is located on the front side of the impact head, and the rear end of the buffer cylinder is provided with a rear baffle for the impact head to directly strike, so that the impact head strikes the rubber buffer, The tailgate is guided and fitted on the mounting seat in the front-rear direction.

The beneficial effects are: the rear end of the buffer cylinder is provided with a rear baffle. When the impact head hits the buffer cylinder, the rear baffle and the impact head directly collide, which protects the buffer cylinder and prolongs the service life of the equipment.

As a further improvement, the tailgate is guided and mounted on the mounting seat along the front-rear direction by a guide rod. Among the tailgate and the mounting seat, one of them is fixedly assembled with the guide rod, and the other is fixedly assembled with the guide rod. It is guided and slidably assembled with the guide rod.

The beneficial effect is: the rear baffle is guided and installed on the mounting seat along the front and rear directions by the guide rod, so that the design can make the rear baffle and the mounting seat can slide relative to each other. When the impact head hits the buffer cylinder, the buffer cylinder is compressed and deformed , the rear baffle can move synchronously with the buffer cylinder to ensure the buffer effect.

As a further improvement, the rear baffle is provided with a rear central hole, and a rear convex ring is arranged at the hole edge of the rear central hole, and the rear convex ring is arranged to protrude forward and is positioned with the inner hole of the buffer cylinder. mating, and then positioning and assembling with the buffer cylinder.

The beneficial effect is that the rear baffle is provided with a rear convex ring, which is designed to facilitate the positioning of the buffer cylinder during installation and ensure the stability of the buffer cylinder.

As a further improvement, the rear side of the mounting seat is provided with a front baffle correspondingly, the front end of the buffer cylinder is press-fitted with the front baffle, the front baffle is provided with a front center hole, and the front A front convex ring is arranged at the hole edge of the central hole, and the front convex ring is arranged to protrude rearward and is used for guiding, positioning and installing the return spring.

The beneficial effects are: the rear side of the mounting seat is correspondingly provided with a front baffle, the front baffle is provided with a front convex ring, the separate design of the mounting seat and the front baffle is for the convenience of processing, and the front baffle is provided with a front convex ring, It is to facilitate the installation of the return spring, and at the same time, it has a guiding effect on the return spring when the return spring is compressed.

As a further improvement, the return spring is a return pressure spring, the return pressure spring is located in the buffer cylinder and is sleeved outside the pull rod, the front end of the return pressure spring is push-fitted with the mounting seat, and the rear end is in a push fit with the mounting seat. Impact head push fit.

The beneficial effects are as follows: the reset spring is a reset compression spring, which is convenient to be sheathed outside the pull rod and arranged in the buffer cylinder, which is not only convenient for assembly, but also can effectively prevent the reset compression spring from being affected.

As a further improvement, a front limit plate and a rear limit plate are provided corresponding to the draw rod, the front limit plate is located on the front side of the repulsion disc, and the front limit plate is used for moving the draw rod forward When moving in place, it cooperates with the repulsion disc to stop and limit; the rear limit plate is located on the rear side of the impact head, and the rear limit plate is used to cooperate with the impact when the pull rod returns to the initial position. Head stop limit fit.

The beneficial effects are: the design of the front limit plate and the rear limit plate can further limit the pull rod when it moves forward or returns to the original position, which ensures the accuracy and stability of the device.

As a further improvement, at least one of the front limit plate and the rear limit plate is a polytetrafluoroethylene plate.

The beneficial effects are: the polytetrafluoroethylene plate has excellent wear resistance and electrical insulation.

Description of drawings

1 is a schematic structural diagram of a quick drive device for a hydraulic control valve in the prior art;

FIG. 2 is a schematic structural diagram of a quick drive device for a hydraulic control valve provided in this embodiment;

FIG. 3 is a schematic structural diagram of the quick drive device in FIG. 2 installed on the hydraulic operating mechanism.

Description of reference numbers:

In Figure 1: 1. Moving iron core; 2. Electromagnet coil; 3. Return spring; 4. Repulsion disc; 5. Repulsion coil; 6. Stop disc.

2 to 3: 1. Moving iron core; 2. Electromagnet coil; 3. Front mounting seat; 31. Front limit plate; 4. Repulsion disc; 5. Repulsion coil; 6. Base; 7. Guide seat; 71, guide hole; 8, front baffle; 81, front convex ring; 82, guide rod; 9, rear baffle; 91, rear convex ring; 10, buffer cylinder; 11, return compression spring; 12, impact head; 13, rear limit plate; 14, pilot valve; 15, hydraulic control valve; 16, pilot valve spool; 17, main body of hydraulic mechanism.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clearly understood, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

It should be noted that relational terms such as the terms "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element defined by the statement "comprising a..." does not exclude processes, methods, and methods that include said element.

In the description of the present utility model, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" that may appear should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

In the description of the present utility model, it should be noted that, unless otherwise expressly specified and limited, the term "provided" that may appear should be understood in a broad sense. It may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

The present utility model will be further described in detail below in conjunction with the embodiments.

The specific embodiment 1 of the hydraulic operating mechanism provided by the utility model:

As shown in FIG. 2 and FIG. 3 , the hydraulic operating mechanism provided in this embodiment includes a hydraulic control valve 15, the hydraulic control valve 15 includes a pilot valve 14 and a quick drive device, the pilot valve 14 has a pilot valve spool 16, and the quick drive The device is used to drive the pull rod to push the pilot valve spool 16 forward to open the pilot valve 14 . The quick drive device is provided with a rubber buffer and a return spring. In the quick drive device of this embodiment, the return spring is mainly used to apply a backward restoring elastic force to the pull rod, and the buffer between the pull rod and the pilot valve spool 16 is mainly provided by a rubber buffer, thereby avoiding the use of elastic molds. The larger amount of the return spring solves the technical problem of the larger elastic modulus of the return spring in the prior art, which affects the quick closing effect of the hydraulic operating mechanism.

Specifically, the structure of the quick drive device is shown in Figure 2, the quick drive device is provided with a mounting seat, the mounting seat includes a guide seat 7, the guide seat 7 is provided with a guide hole 71, and the pull rod is slidably assembled in the guide hole 71 in the front-rear direction In the middle, the tie rod is the moving iron core 1 . When the moving iron core 1 moves forward, it pushes the pilot valve spool 16 of the hydraulic control valve 15 to open the pilot valve 14 . The driving mechanism of the moving iron core 1 includes a repulsive force mechanism and an electromagnet coil 2. The repulsive force mechanism includes a repulsive force disc 4 and a repulsive force coil 5. The driving mechanism is used to drive the moving iron core 1 to move forward from the corresponding initial position to push the hydraulic control valve. 15 of the pilot valve spool 16.

In this embodiment, the rear end of the moving iron core 1 is provided with an impact head 12, and a return spring is provided between the impact head 12 and the guide seat 7, the return spring adopts a return compression spring 11, and the moving iron core 1 moves forward from the initial position During the process, the reset compression spring 11 compresses and stores force under the extrusion of the impact head 12 and the guide base 7 . The rearward reset elastic force enables the movable iron core 1 to return to the corresponding initial position.

In this embodiment, the rear side of the guide seat 7 is provided with a front baffle 8 correspondingly, and the front baffle 8 is provided with a front center hole. The front convex ring 81 is arranged at the hole edge of the side center hole, and the front convex ring 81 is arranged to protrude backward. During installation, the reset compression spring 11 is sleeved on the moving iron core 1, so that the rear end of the reset compression spring 11 is installed on the impact head. 12, then put the moving iron core 1 through the guide hole 71 on the mounting seat, so that the front end of the reset compression spring 11 is guided and positioned on the front convex ring 81. At this time, the front end of the reset compression spring 11 and the front stop The plate 8 forms a push fit, and the rear end of the return compression spring 11 forms a push fit with the impact head 12 .

In this embodiment, in order to buffer the impact of the moving iron core 1 on the pilot valve core 16, a rubber buffer is provided between the impact head 12 and the guide seat 7, and the rubber buffer is a buffer cylinder 10, and the buffer cylinder 10 is coaxially arranged. The spacer is sleeved on the outside of the movable iron core 1 and the reset compression spring 11. In order to realize the positioning and installation of the buffer cylinder 10, the rear end of the buffer cylinder 10 is provided with a rear baffle 9, and the rear baffle is also provided with a rear center hole. A rear convex ring 91 is provided at the hole edge of the rear central hole, and the rear convex ring 91 is arranged to protrude forward, and the inner hole of the buffer cylinder 10 is positioned and fitted on the rear convex ring 91 . The rear baffle 9 is guided and installed on the mounting seat along the front-rear direction by the guide rod 82. Specifically, the guide rod 82 is fixedly assembled on the front baffle 8 of the guide seat 7, and the guide rod 82 extends in the front-rear direction. The rear end of the guide rod 82 Passing through the rear baffle 9, the front end of the guide rod 82 is provided with a thread of a specified design length, and the guide rod 82 is fixedly installed with the guide seat through a threaded connection, so that the front end of the buffer cylinder 10 is pushed into contact with the front baffle 8, and the buffer cylinder The rear end of the 10 is in pushing contact with the rear baffle 9. According to the actual requirements, the pre-compression amount of the buffer cylinder 10 can be adjusted by adjusting the depth of the thread on the guide rod 82 screwed into the guide seat 7. When the impact head 12 directly hits the tailgate 9 , the buffer cylinder 10 will be further compressed and deformed under the impact of the striker head 12 . At this time, the tailgate 9 will push the buffer cylinder 10 forward along the guide rod 82 . When the movable iron core 1 returns to the corresponding initial position, the buffer cylinder 10 returns to its original state by its own elasticity, and at this time, the buffer cylinder 10 pushes the rear baffle 9 backward, so that the rear baffle 9 moves backward.

It should be emphasized that, in this embodiment, when the moving iron core 1 moves forward from the initial position to push the pilot valve spool 16 of the hydraulic control valve 15, when the return compression spring 11 stores energy under pressure, Although it can play a certain buffering role, when the impact head 12 directly collides with the rear baffle 9, the buffer cylinder 10 assumes the main buffering role. After the reset elastic force.

In this embodiment, the mounting base further includes a base 6 , and the base 6 is located on the front side of the guide base 7 . The repulsion disc 4 is fixedly mounted on the movable iron core 1 and is located on the front side of the base 6 . The repulsion coil 5 is installed corresponding to the repulsion disc 4 , the repulsion coil 5 is installed on the base 6 , and a power supply circuit is also installed on the base 6 for supplying power to the repulsion coil 5 . The power supply line includes capacitor C and switch S. In addition, the moving iron core 1 is circumferentially arranged with an electromagnet coil 2 , and the electromagnet coil 2 is arranged on the front side of the repulsion disk 4 .

In this embodiment, a front limiter plate 31 and a rear limiter plate 13 are provided corresponding to the movable iron core 1 , the front limiter plate 31 and the rear limiter plate 13 are both PTFE plates, and the front limiter plate 31 is fixedly installed On the front mounting seat 3 and located on the front side of the repulsion plate 4, the front mounting seat 3 is fixedly installed on the front side of the guide seat 7 through the connecting rod, and the front limit plate 31 is used to connect with the moving iron core 1 when the moving iron core 1 moves forward in place. The repulsion disc 4 stops the limit fit. The rear limit plate 13 is fixed on the guide base 7 and located on the rear side of the impact head 12 . The rear limit plate 13 is used to stop and limit the impact head 12 when the moving iron core 1 returns to the initial position. It should be noted that when the movable iron core 1 moves forward to the design distance value, the movable iron core 1 pushes into contact with the pilot valve spool 16 .

In this embodiment, the pilot valve 14 is installed on the hydraulic mechanism main body 17 of the hydraulic operating structure. When the pilot valve 14 needs to be opened, the electromagnet coil 2 is energized, and the switch S is opened at the same time, the capacitor C is charged to the repulsion coil 5, and the solenoid The iron coil 2 generates a forward magnetic force on the moving iron core 1, and at the same time, a pulse current is generated in the repulsion coil 5, and the pulse current generates an alternating magnetic field around the repulsion coil 5. The interaction between the disc 4 and the repulsion coil 5 produces a repulsion force, and the moving iron core 1 moves forward from the initial position under the driving of the electromagnet coil 2 and the repulsive force disc 4, so that the front end of the moving iron core 1 pushes the pilot valve spool 16 , when the moving iron core 1 moves in place, the pilot valve 14 is opened. During this process, the impact head 12 compresses the return pressure spring 11 and directly collides with the rear baffle 9, and the repulsion disc 4 moves forward to meet the front limit plate 31. Stop limit fit.

In this embodiment, during the opening process of the main valve spool of the hydraulic control valve 15, the pilot valve spool 16 must be kept open, but due to the characteristics of the repulsion mechanism itself, the repulsion force rapidly appears and then decays rapidly. At this time, only the electromagnet coil 2 keeps acting on the moving iron core 1, so that the spool 16 of the pilot valve remains open. When the pilot valve 14 needs to be closed, the electromagnet coil 2 and the repulsion coil 5 are powered off at the same time, and the reset compression spring 11 provides a backward reset elastic force to the movable iron core 1, so that the movable iron core 1 moves backward to the corresponding initial stage. position, at this time, the impact head 12 cooperates with the push limit of the tailgate 9 .

The hydraulic operating mechanism provided by the present invention includes a quick drive device, and a rubber buffer and a reset compression spring 11 are correspondingly provided on the quick drive device. When the pilot valve 14 is opened, the impact head 12 is driven forward by the moving iron core 1 . Moving the impact buffer cylinder 10 can buffer the impact of the movable iron core 1 on the pilot valve spool 16 . When the pilot valve 14 is closed, the return compression spring 11 is used to apply a backward restoring elastic force to the pull rod to force the pull rod to return to the corresponding initial position. In the hydraulic operating mechanism, the buffer cylinder 10 plays the main role of buffering the impact. When the reset compression spring 11 is selected, the reset compression spring 11 with a smaller elastic modulus can be selected to ensure that the reset compression spring 11 can provide reset elasticity. The force is sufficient, thereby effectively solving the technical problem that the large elastic modulus of the position spring affects the quick closing effect of the hydraulic operating mechanism.

The specific embodiment 2 of the hydraulic operating mechanism provided by the utility model:

The main difference from Embodiment 1 is that in Embodiment 1, the tie rod is a moving iron core. In this embodiment, the tie rod includes a moving iron core and a booster rod. The moving iron core and the booster rod are coaxially arranged and located in front of the booster rod. A repulsion disk is fixedly installed on the booster rod. The repulsion disk is correspondingly provided with a repulsion coil. There is an electromagnet coil around the circumference. When the pilot valve needs to be opened, the repulsion coil and the electromagnet coil are energized at the same time.

The specific embodiment 3 of the hydraulic operating mechanism provided by the utility model:

The main difference between it and Embodiment 1 is that in Embodiment 1, the rubber buffer member is a buffer cylinder, and the buffer cylinder is coaxially and spaced on the outside of the tie rod. In this embodiment, the rubber buffer member is a plurality of buffer columns, the buffer columns are arranged in parallel with the tie rod, and are positioned and installed between the front baffle and the rear baffle, which can also buffer the impact of the moving iron core on the pilot valve core. Corresponding guide rods are guided and assembled at the central position of the buffer column, and grooves can also be provided on the opposite sides of the front and rear baffles to position the buffer column.

The specific embodiment 4 of the hydraulic operating mechanism provided by the utility model:

The main difference between it and Embodiment 1 is that in Embodiment 1, the impact head is located at the rear end of the moving iron core. In this embodiment, the impact head is located in the middle of the moving iron core, and is located on the front side of the repulsion disc. Correspondingly, the rubber buffer is fixedly installed on the corresponding mounting piece, and the mounting piece can be fixedly assembled with the mounting seat, or the mounting piece can be fixed with the mounting piece. The seats are arranged independently and separately, and the mounting pieces are relatively fixed with the mounting seats, so that the rubber pieces are arranged between the front limit plate and the impact head.

The specific embodiment 5 of the hydraulic operating mechanism provided by the utility model:

The main difference between it and Embodiment 1 is that in Embodiment 1, the rear side of the guide seat is provided with a front baffle. In this embodiment, the rear side of the guide seat is not provided with a front baffle, the rear end hole of the guide hole is arranged with a front convex ring extending rearward along the edge, and the front end of the guide rod is fixedly assembled with the guide seat.

The specific embodiment 6 of the hydraulic operating mechanism provided by the utility model:

The main difference from Embodiment 1 is that in Embodiment 1, the return compression spring is a return compression spring. In this embodiment, the reset compression spring is a reset tension spring, one end of the reset tension spring is connected to the impact head, and the other end is connected to the rear limit plate.

The specific embodiment 7 of the hydraulic operating mechanism provided by the utility model:

The main difference from Embodiment 1 is that in Embodiment 1, the front limit plate and the rear limit plate are both polytetrafluoroethylene plates. In this embodiment, only one of the front limit plate and the rear limit plate is a polytetrafluoroethylene plate.

The embodiment of the quick drive device of the hydraulic control valve provided by the utility model:

The structure of the quick drive device of the hydraulic control valve in this embodiment is the same as that of the quick drive device of the hydraulic control valve in the hydraulic operating mechanism, which will not be repeated here.

In other embodiments, the structure of the quick drive device of the hydraulic control valve may also adopt the structure of any of the above-mentioned hydraulic operating mechanism embodiments 2 to 7, which will not be repeated here.

Finally, it should be noted that the above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. , it is still possible to make modifications to the technical solutions described in the foregoing embodiments without creative labor, or to perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. A quick driving device of a hydraulic control valve comprises an installation seat, wherein a pull rod is arranged on the installation seat in a guiding and moving mode along the front-back direction, the pull rod is used for pushing a pilot valve spool (16) of the hydraulic control valve (15) forwards to open a pilot valve (14), and the pull rod comprises a movable iron core (1) or is the movable iron core (1); the mounting seat is also provided with an electromagnet coil (2) for applying driving force to the movable iron core (1) so as to drive the pull rod to move forwards from the initial position; the quick driving device further comprises a repulsion mechanism, the repulsion mechanism comprises a repulsion disc (4) and a repulsion coil (5), and the repulsion disc (4) is fixedly mounted on the pull rod and used for applying driving force to the pull rod to drive the pull rod to move forwards from an initial position; the quick driving device is characterized by also comprising a rubber buffer and a return spring (11); the rubber buffer piece is arranged on the mounting seat or is fixedly arranged opposite to the mounting seat, an impact head (12) is fixedly arranged on the pull rod, and the impact head (12) is used for impacting the rubber buffer piece when the pull rod moves forwards so as to buffer the impact of the pull rod on the pilot valve spool (16); the return spring (11) is used for applying backward return elastic force to the pull rod to force the pull rod to return to the corresponding initial position.

2. The quick drive of a hydraulic control valve according to claim 1, characterized in that the rubber buffer is a buffer cylinder (10), and the buffer cylinder (10) is coaxially fitted around the outside of the tension rod at intervals.

3. The quick driving device of the hydraulic control valve according to claim 2, characterized in that the buffer cylinder (10) is located at the front side of the impact head (12), the rear end of the buffer cylinder (10) is provided with a rear baffle (9) for the impact head (12) to directly impact, so that the impact head (12) impacts the rubber buffer, and the rear baffle (9) is assembled on the mounting seat in a guiding manner along the front-rear direction.

4. The quick drive device of a hydraulic control valve according to claim 3, characterized in that the tailgate (9) is installed on the mount base by a guide rod (82) in a front-rear direction guide, and one of the tailgate (9) and the mount base is fixedly fitted with the guide rod (82) and the other is slidably fitted with the guide rod (82).

5. The quick driving device of the hydraulic control valve according to claim 4, characterized in that the rear baffle (9) is provided with a rear central hole, a rear convex ring (91) is arranged at the hole edge of the rear central hole, and the rear convex ring (91) is arranged in a forward protruding manner, positioned and inserted with the inner hole of the buffer cylinder (10) and further positioned and assembled with the buffer cylinder (10).

6. The quick driving device of the hydraulic control valve according to claim 4, characterized in that a front baffle (8) is correspondingly arranged on the rear side of the mounting seat, the front end of the buffer cylinder (10) is in press fit with the front baffle (8), a front center hole is arranged on the front baffle (8), a front convex ring (81) is arranged at the hole edge of the front center hole, and the front convex ring (81) is arranged in a protruding manner backwards and used for guiding, positioning and mounting the return spring (11).

7. The quick driving device of the hydraulic control valve according to any one of claims 2 to 6, wherein the return spring (11) is a return compression spring, the return compression spring is located in the buffer cylinder (10) and sleeved outside the pull rod, the front end of the return compression spring is in pushing fit with the mounting seat, and the rear end of the return compression spring is in pushing fit with the impact head (12).

8. The quick driving device of the hydraulic control valve according to any one of claims 1 to 6, characterized in that a front limiting plate (31) and a rear limiting plate (13) are arranged corresponding to the pull rod, the front limiting plate (31) is arranged at the front side of the repulsive disc (4), and the front limiting plate (31) is used for being in stop limiting fit with the repulsive disc (4) when the pull rod moves forwards to a certain position; the rear limiting plate (13) is located on the rear side of the impact head (12), and the rear limiting plate (13) is used for being matched with the impact head (12) in a stopping and limiting mode when the pull rod is restored to the initial position backwards.

9. The quick drive of hydraulic control valves according to claim 8, characterized in that at least one of the front limiting plate (31) and the rear limiting plate (13) is a teflon plate.

10. A hydraulic operating mechanism comprises a hydraulic control valve (15), wherein the hydraulic control valve (15) comprises a pilot valve (14) and a quick driving device, the pilot valve (14) is provided with a pilot valve spool (16), and the quick driving device is used for pushing the pilot valve spool (16) to move forwards so as to open the pilot valve (14); characterized in that the quick drive device adopts the quick drive device of the hydraulic control valve of any one of claims 1 to 9.

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