CN111924774A

CN111924774A - Oil sample connects uncapping device during operation of transformer substation oil sample

Info

Publication number: CN111924774A
Application number: CN202010555693.6A
Authority: CN
Inventors: 陈铭炜; 王胜; 胡雪平; 金秀峰; 吕建龙; 王志亮; 秦建松
Original assignee: State Grid Zhejiang Electric Power Co Ltd; Shaoxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Current assignee: State Grid Zhejiang Electric Power Co Ltd; Shaoxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2020-11-13

Abstract

The invention discloses a device for opening a cap of an oil sample joint during oil sample taking operation of a power substation, which comprises: the positioning support comprises a bottom inner hexagonal sleeve and a top plate connected with the bottom inner hexagonal sleeve, the bottom inner hexagonal sleeve is matched with the hexagonal bottom of the oil sample joint to realize tool positioning, and a bearing mounting hole and an invagination bearing are formed in the middle of the top plate; the cap rotating mechanism for the head of the oil sample connector comprises a structural frame body, an invaginated middle inserted transmission gear connected to the structural frame body and three pawl fingers with gears arranged around the invaginated middle inserted transmission gear, wherein the invaginated middle inserted transmission gear is in meshing transmission with the pawl fingers with the gears, and a transmission hole is formed in the center of the invaginated middle inserted transmission gear; the electric torque handle with the power supply comprises a transmission rod, wherein the transmission rod penetrates through an invagination bearing on a top plate and is inserted into a transmission hole of an invagination middle plug-in transmission gear. The invention can improve the sampling work efficiency, reduce the sampling uncapping difficulty and improve the safety and reliability of the on-site sampling uncapping work.

Description

Oil sample connects uncapping device during operation of transformer substation oil sample

Technical Field

The invention belongs to the technical field of electric power safety production, and particularly relates to a special tool developed for solving the problem that an oil sample joint is difficult to open a cover during equipment oil sample taking operation of a substation.

Background

1. Current situation of oil sampling

Sampling is an important part of oil service work, and opening the cap of the oil sample joint is an essential ring in the sampling work. With the gradual expansion of the scale of the transformer substation and the gradual increase of the number of the transformer equipment, the relative equipment needing oil sampling is increased. The oil sample joint at present is mainly a joint of Hangzhou Korlin and similar structures. The cap and the oil-like joint are screwed by screw threads and finally compacted and sealed by a rubber ring. The tools frequently used for opening the cap of the oil-like joint at present are pipe tongs, water pump tongs and adjustable wrenches. The cap case is classified into two cases, jamming and non-jamming. In the non-clamping cap opening process, the cap is directly held by a single hand to rotate and open. In the clamping stagnation, the whole oil sample joint can move and the oil sample joint can not move. The working environment generally comprises two working conditions of high-altitude operation (over 2.5M above the ground) (an insulating ladder with corresponding length is leaned on a rheological support column, and a person steps on the high position of the ladder) and low-position operation (below 1M below the ground) (generally, a lower oil sample of the main transformer is taken).

2. Problems in the process of sampling oil at present

The main problems in the oil sampling process at the present stage are as follows:

firstly, the number of devices needing oil sampling increases year by year. The total number of oil sample joints is increased, the workload is increased year by year, and the working efficiency needs to be improved.

And secondly, the field sampling interval time is about one year, the oil sample joint is exposed outdoors for a long time, and the rubber ring can be aged, clamped, stuck, adhered and compacted under the action of temperature illumination and oil.

Thirdly, the joint cap opener is not suitable for use.

Fourthly, the operation difficulty is easily increased greatly due to the field sampling operation environment, and danger is easily caused.

The physical strength factor of the operators and the like are approaching to saturation, and breakthrough in the tool technology is needed. In-situ sampling often encounters cap jamming. The cap becomes stuck so that a tool must be used to rotate the opening cap. The forceful free-hand opening can easily cause soft tissue contusion at the wrist due to the violent exertion. Even with tools, this can cause a hazard due to the cap being suddenly opened or the tool slipping off. (the oil sample joint tool can be clamped at a position, and is thin, smooth and round.) if the whole oil sample joint moves, in order to avoid the situation that the oil sample joint is unscrewed when the cover does not move, two tools are required to be matched for uncovering, and both hands are required to hold the tool to enable the tool to be powerful. The opening of the pipe wrench used at the present stage is easy to loosen, and the grip opening is too large and difficult to hold when the water pump wrench is used for clamping, so that the clamping force is insufficient. The operator is easy to be tired after high-intensity operation, and the tool is easy to slip. The tool used at the present stage needs to rotate along with the unscrewing of the cap, but the mounting position of the oil sample joint is narrow, and the tool can be repeatedly clamped to complete the cap opening operation. The working environment generally comprises two working conditions of high-altitude operation (over 2.5M above the ground) and main-low operation (below 1M below the ground). The operation at high places on the ladder often requires both hands to hold a tool to open the cover, and the operation is often carried out with great force. In addition, because the hexagon at the bottom of the oil-like joint is thin and the cap is smooth and cylindrical, the tool is easy to slip. The worker is liable to suddenly lose stability while standing on the ladder. Both hands are more prone to falling off when used to hold the tool. Meanwhile, the slipping of the tool can bring danger to auxiliary personnel below due to falling objects. The difficulty and risk of the operation are great. When the transformer works at a low position, part of main transformer oil sample connectors are low and close to the ground, and the main transformer oil sample connectors sink into the bottom of the transformer. In addition, due to the existence of various grounding flat irons and various pipelines on the main transformer side, the sampling working position is narrow, and the cap can not be opened by two hands even if the user kneels and falls down. However, if the cap is locked on the joint to rotate, both hands are required to exert force, and the operation is difficult. The working convenience and safety of opening the oil sample connector cap are urgently required to be improved. Especially, under the condition that the oil sample joint cap is easy to generate clamping stagnation and the workload is increased more and more.

Disclosure of Invention

Aiming at the defects of the existing stage in the process of opening the cap of the oil sample connector during sampling, the invention aims to provide the device for opening the cap of the oil sample connector during the oil sample taking operation of the power substation, and effectively solves the problems of difficulty and danger in opening the cap of the oil sample connector.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides an oil appearance connects uncapping device during operation of transformer substation's oil appearance, includes:

the positioning support comprises a bottom inner hexagonal sleeve and a top plate connected with the bottom inner hexagonal sleeve, the bottom inner hexagonal sleeve is matched with the hexagonal bottom of the oil sample joint to realize tool positioning, and a bearing mounting hole and an invagination bearing are formed in the middle of the top plate;

the oil sample joint head cap rotating mechanism comprises a structural frame body, an invaginated middle inserted transmission gear connected to the structural frame body and three pawl fingers with gears arranged around the invaginated middle inserted transmission gear, wherein the invaginated middle inserted transmission gear is in meshing transmission with the pawl fingers with the gears, and a transmission hole is formed in the center of the invaginated middle inserted transmission gear;

the electric torque handle with the power supply comprises a transmission rod, and the transmission rod penetrates through an invagination bearing on the top plate and is inserted into a transmission hole of an invagination middle plug-in transmission gear;

the top plate and the electric torque handle with the power supply are fixed by bolts.

Preferably, the top end of the bottom inner hexagonal sleeve is connected with a cylinder.

Preferably, one ends of at least two connecting steel bars are welded to the outer wall of the cylinder at intervals, and the other ends of the connecting steel bars are connected with the top plate.

Preferably, the top plate is provided with an insertion hole, and the other end of the connecting steel bar is inserted into the insertion hole and is welded and fixed.

Preferably, the projection of the structural frame body is triangular, and the three pawl fingers with the gears are distributed on three corners of the triangle.

Preferably, the electric torque handle with the power supply comprises a universal 25V drilling machine lithium battery, a worm gear speed reduction motor and a button switch with a protection function, the universal 25V drilling machine lithium battery is used as the power supply of the worm gear speed reduction motor, a transmission rod is arranged at the output end of the worm gear speed reduction motor, and the button switch with the protection function is used for controlling the worm gear speed reduction motor.

Preferably, the top plate is provided with a fixing hole, and the fixing hole is connected with a fixing bolt for fixing the electric torque handle with the power supply and the top plate.

Preferably, the electric torque handle with the power supply adopts an electric wrench.

Preferably, the electric wrench is fixed through a bolt hoop.

Preferably, the transmission rod and the transmission hole are in a hexagonal matching structure.

According to the technical scheme, during operation, the electric torque handle with the power supply is held by a single hand, the positioning support is sleeved into the oil sample joint, the position is fixed by matching the bottom inner hexagonal sleeve with the hexagonal bottom, the button switch with the protection is pressed down, the worm and gear speed reducing motor rotates to drive the invaginated middle plug-in transmission gear of the cap rotating mechanism at the head of the oil sample joint to rotate, so that the three pawl fingers with the gears rotate, and then the three pawl fingers with the gears grasp the cap of the oil sample joint and rotate to open.

Therefore, the following beneficial effects are achieved:

1. improve sample work efficiency:

under the condition that the whole working process and the sampling working condition are not changed. The factors influencing the operating efficiency are solidified, and the tool can realize that the oil sample cap is opened without external force, and whether the cap is clamped or not, and whether the joint rotates or not. Convenient and fast, effectively improve work efficiency, practice thrift manual work, manufacturing cost.

2. Reduce the sample degree of difficulty of uncapping:

the tool can be operated with one hand during opening of the oil sample joint cap without the need for force. Can both greatly reduce the sample difficulty of uncapping under two kinds of operation environment of eminence low place. Meanwhile, the position of the tool does not need to be changed during operation, so that the condition that the cover can be opened only by repeatedly clamping and rotating the tool due to poor position of the oil sample connector is avoided.

3. The safe reliability of on-site sampling uncapping work is improved:

because the condition that this instrument had effectively avoided both hands to grip the instrument operation appears, has effectively solved the risk that the instrument slipped from oil appearance joint, has effectively solved the hard problem of opening the cap. The comprehensive tool using scene can greatly improve the safety and reliability of on-site sampling and uncovering work.

The following detailed description of the present invention will be provided in conjunction with the accompanying drawings.

Drawings

The invention is further described with reference to the accompanying drawings and the detailed description below:

FIG. 1 is a front view of a positioning bracket;

FIG. 2 is an axial view of the positioning bracket;

FIG. 3 is a front view of a bottom hexagonal socket connecting cylinder;

FIG. 4 is an axial view of a bottom hexagonal socket coupling cylinder;

FIG. 5 is a front view of the oil sample joint head cap rotating mechanism after being connected with the positioning bracket;

FIG. 6 is an axial view of the oil sample joint head cap rotating mechanism after being connected with the positioning bracket;

FIG. 7 is a front view of the power-operated torque handle with power supply connected to the top plate;

FIG. 8 is a rear axial view of the powered electric torque handle connected to the top plate;

FIG. 9 is a front view of a bottom hexagonal socket connecting cylinder mated with an oil sample fitting;

FIG. 10 is an axial view of the bottom hexagon socket joint cylinder mated with the oil sample fitting;

in the figure:

100-oil sample joint; 101-hexagonal bottom; 102-a cap; 103-rubber ring;

1-positioning a bracket; 4-a hexagonal socket inside the bottom; 13-cylinder; 6-a connecting steel bar; 5-a top plate; 14-invaginated bearing; 2-an oil sample joint head cap rotating mechanism; 7-structural frame body; 8-pawl claw finger with gear; 9-inserting a transmission gear in the middle of the invagination; 3-electric torque handle with power supply; 10-worm gear reduction motor; 11-a protected push-button switch; 12-general 25V drill lithium battery and shell.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be appreciated by those skilled in the art that features from the examples and embodiments described below may be combined with each other without conflict.

Referring to fig. 1 to 10, a device for opening a cap of an oil sample joint during oil sample taking operation of a power substation solves the problem that the cap of the oil sample joint is difficult to open and dangerous. Wherein the oil-like fitting 100 has a hexagonal bottom 101, a cap 102 and a rubber band 103, the tool comprising:

the positioning support 1, positioning support 1 includes bottom hexagon socket head cap sleeve 4 and the roof 5 with bottom hexagon socket head cap muffjoint, the cooperation of bottom hexagon socket head cap sleeve 4 and the hexagon bottom 101 of oil appearance joint 100 realizes the instrument location. And a bearing mounting hole is formed in the middle of the top plate 5, and an inward-recessed bearing 14 is mounted on the bearing mounting hole.

The size design that the hexagonal sleeve in bottom connects to general oil appearance makes things convenient for the upper shield to connect, and the fixed action to oil appearance joint bottom of playing that can be fine. Thereby realizing the function that the oil sample joint keeps still in the cap opening process. In addition, the tool is convenient to tighten the loose oil sample joint, and the defect of oil leakage of a potential joint is eliminated.

The oil sample joint head cap rotating mechanism 2 comprises a structural frame body 7, an invaginated middle plug-in transmission gear 9 connected to the structural frame body 7 and three toothed wheel pawl fingers 8 arranged around the invaginated middle plug-in transmission gear 9, wherein the invaginated middle plug-in transmission gear 9 is in meshing transmission with the toothed wheel pawl fingers 8, and a transmission hole is formed in the center of the invaginated middle plug-in transmission gear 9. Three toothed click fingers 8 grip the cap 102 of the oil-like joint.

The cap rotating mechanism for the head of the oil sample connector adopts a design similar to that of a cover opening ratchet of an automobile engine oil filter element, can automatically rotate and clamp, and is designed for the cap of a general oil sample connector in size. The cap can be grasped by rotation to perform the screwing and unscrewing operation. The size is targeted, so that the rotary ratchet grab can be attached to the joint cap as much as possible. Certain space margin can be reserved for increasing stroke, protecting the motor and enabling operation to be smoother.

The electric torque handle 3 with the power supply comprises a transmission rod, and the transmission rod penetrates through an invagination bearing 14 on the top plate and is inserted into a transmission hole of an invagination middle plug-in transmission gear 9.

The top plate 5 and the electric torque handle 3 with the power supply adopt a positioning hole and a positioning pin for matching positioning and a bolt fixing design, and the positioning support 1 and the electric torque handle 3 with the power supply are fixed together.

Therefore, the top plate 5 and the oil sample joint head cap rotating mechanism 2 are combined through the invagination bearing and the transmission rod. The oil sample joint head cap rotating mechanism 2 and the electric torque handle 3 with the power supply are connected and driven in a plugging mode. The oil sample joint head cap rotating mechanism 2 is contained in the positioning bracket 1 and can rotate freely. The positioning support 1, the oil sample joint head cap rotating mechanism 2 and the electric torque handle 3 with the power supply are combined together through a top plate.

Above design can be through making oil appearance joint bottom fixed and head cap relative rotation, realizes the function that the one hand conveniently opened oil appearance and connects the cap. The condition that the cap of the oil sample connector is difficult to unscrew to cause the cap to be unscrewed without moving the oil sample connector is avoided, the danger that a wrench must be held by one hand and a pipe wrench or even a pipe wrench must be held by two hands to open the cap when the high-altitude sampling operation is avoided, and the condition that the user must kneel and lie down to operate when the user samples the low and narrow part is avoided. Therefore, the working efficiency is effectively improved, and the labor and the production cost are saved; the sampling and cover opening difficulty is reduced; the safety and reliability of on-site sampling and cover opening work are improved.

The transmission rod with the power supply electric torque handle 3 penetrates through the sunken bearing 14 and is inserted into the transmission hole of the sunken middle plug-in transmission gear 9. The combination mode provides a certain operation buffering space under the conditions that the tool structure is stable, and the oil sample joint head cap rotating mechanism 2 is relatively fixed in position. And the possibility of replacing parts is provided for dealing with working objects with different sizes.

Referring to fig. 3 and 4, a cylinder 13 is connected to the bottom hexagon socket 4. The bottom edge is an inner hexagonal sleeve, and the rest part is cylindrical, so that the structure strength is improved, and the positioning tool can also play a role. Preventing the tool from being too deep and falling out (the barrel position sleeve does not enter the bottom of the oil sample joint).

Referring to fig. 1 and 2, one ends of three connection steel bars are welded in parallel at intervals of 120 degrees to the outer wall of the cylinder 13, and the other ends of the connection steel bars are connected to the top plate. Specifically, the top plate is circular, and is provided with an insertion hole, and the other end of the connecting steel bar is inserted into the insertion hole and is welded and fixed. The connecting steel bar and the top plate are welded together, and besides the anti-torsion structural strength and the rotating movement space of the internal oil sample joint head cap rotating mechanism, the function of rotating the observation window of the oil sample joint cap is realized. Meanwhile, the internal oil sample joint head cap rotating mechanism and the power-supply electric torque handle are connected through the top plate, so that the tool is integrated.

Preferably, the downward projection of the structural frame 7 is triangular, the three pawl fingers 8 with the gear are distributed at three corners of the triangle, and the three pawl fingers 8 with the gear are connected to the structural frame 7 by rivet screws.

In the embodiment, the electric torque handle 3 with the power supply comprises a universal 25V drilling machine lithium battery and shell 12, a worm gear speed reduction motor 10 and a button switch 11 with a protection function, wherein the universal 25V drilling machine lithium battery is used as a power supply of the worm gear speed reduction motor, a transmission rod is arranged at the output end of the worm gear speed reduction motor, and the button switch with the protection function controls the worm gear speed reduction motor.

Wherein, the electric torque handle with the power supply can also be directly matched with an electric wrench purchased from other places. A GW600JSX-24V-5RPM large-torque worm gear speed reduction motor and a corresponding power supply are adopted, or a purchased large-torque 90-degree electric wrench is directly adopted. Achieves small volume, slow rotating speed and large torque, and is suitable for hand holding. The device has small volume and short length, and is suitable for operation in narrow places. The torsion is relatively large, the moment can be changed, the function of the part is mature, and the screwing-out and screwing-down are all suitable.

In order to fix the electric torque handle with the power supply, a fixing hole is formed in the top plate, and the fixing hole is connected with a fixing bolt for fixing the electric torque handle with the power supply and the top plate. Or the purchased large-torque 90-degree electric wrench is fixed through the bolt hoop.

During operation, the electric torque handle with the power supply is held by a single hand, the positioning support is sleeved in the oil sample joint, the position is fixed by matching the hexagonal bottom and the inner hexagonal sleeve at the bottom, the button switch with the protection is pressed, the worm and gear speed reducing motor rotates to drive the invaginated middle plug-in transmission gear of the cap rotating mechanism at the head of the oil sample joint to rotate, so that the three pawl fingers with the gear rotate, and then the three pawl fingers with the gear tightly grasp the cap of the oil sample joint and rotate to open.

While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in other forms without departing from the spirit or essential characteristics thereof. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims

1. The utility model provides an oil appearance connects uncapping device during operation of transformer substation's oil appearance, its characterized in that includes:

the electric torque handle with the power supply comprises a transmission rod, wherein the transmission rod penetrates through an invagination bearing on the top plate and is inserted into a transmission hole of an inserted transmission gear in the middle of the invagination.

2. The device for opening the cap of the oil sample joint during the oil sample taking operation of the power substation as claimed in claim 1, wherein: the top end of the bottom inner hexagonal sleeve is connected with a cylinder.

3. The device for opening the cap of the oil sample joint during the oil sample taking operation of the power substation as claimed in claim 2, wherein: one ends of at least two connecting steel bars are welded on the outer wall of the cylinder at intervals, and the other ends of the connecting steel bars are connected with the top plate.

4. The device for opening the cap of the oil sample joint during the oil sample taking operation of the power substation as claimed in claim 3, wherein: the top plate is provided with an insertion hole, and the other end of the connecting steel bar is inserted into the insertion hole and is welded and fixed.

5. The device for opening the cap of the oil sample joint during the oil sample taking operation of the power substation as claimed in claim 3, wherein: the projection of the structural frame body is triangular, and the three pawl fingers with the gears are distributed on three corners of the triangle.

6. The device for opening the cap of the oil sample joint during the oil sample taking operation of the power substation as claimed in claim 1, wherein: the electric torque handle with the power supply comprises a universal 25V drilling machine lithium battery, a worm gear speed reducing motor and a button switch with the protection, the universal 25V drilling machine lithium battery serves as a power supply of the worm gear speed reducing motor, a transmission rod is arranged at the output end of the worm gear speed reducing motor, and the button switch with the protection controls the worm gear speed reducing motor.

7. The device for opening the cap of the oil sample joint during the oil sample taking operation of the power substation as claimed in claim 6, wherein: the top plate is provided with a fixing hole, and the fixing hole is connected with a fixing bolt for fixing the power-driven torque handle with the power supply and the top plate.

8. The device for opening the cap of the oil sample joint during the oil sample taking operation of the power substation as claimed in claim 1, wherein: the electric torque handle with the power supply adopts an electric wrench.

9. The device for opening the cap of the oil sample joint during the oil sample taking operation of the power substation as claimed in claim 8, wherein: the electric wrench is fixed through the bolt hoop.

10. The device for opening the cap of the oil sample joint during the oil sample taking operation of the power substation according to any one of claims 1 to 9, wherein: the transmission rod and the transmission hole are in a hexagonal matching structure.