WO2020168776A1

WO2020168776A1 - Air tightness detection device, lamp body waterproof structure, and air tightness detection and sealing method

Info

Publication number: WO2020168776A1
Application number: PCT/CN2019/122420
Authority: WO
Inventors: 林灿荣; 吴铎; 陈辉奇; 彭卓志; 丹尼斯
Original assignee: 海捷水下潜航器（深圳）有限公司
Priority date: 2019-02-19
Filing date: 2019-12-02
Publication date: 2020-08-27
Also published as: CN109708824A; CN109708824B

Abstract

Disclosed are an air tightness detection device, a lamp body waterproof structure as well as an air tightness detection and sealing method. The air tightness detection device is used for being directly assembled at an open end of a workpiece, so as to form an enclosed space for detecting the overall air tightness. The air tightness detection device comprises a mounting base (1) and an interface valve (2). The air tightness detection device is fixedly connected to the open end of a semi-closed workpiece via the mounting base (1), and is correspondingly and detachably connected to the wall circumference of the workpiece. With no need of immersing a product in water, the high-precision air tightness detection device can detect whether the air tightness is qualified by measuring the pressure drop inside product cavity within a specified time period. The air tightness detection device is used for being directly assembled at the open end of the workpiece, so as to form an enclosed space as part of a sealed cavity of the product to be detected. The air tightness detection device can detect the air tightness of an interface, thereby facilitating the discovery of wear pattern for timely maintenance.

Description

Air tightness detection device, lamp body waterproof structure and air tightness detection and sealing method

Technical field

The invention belongs to the field of inspection tools, and specifically relates to an air tightness detection device, a lamp body waterproof structure, and an air tightness detection and sealing method.

Background technique

With the popularization and application of electronic components and equipment, more and more attention has been paid to the research in the direction of airtightness. The airtightness characteristics have become a necessary and primary quality indicator when electronic components are used in water or dust environments or other special environments.

Most of the existing technologies require products to be placed in a water environment under pressure for air-tightness testing, and many products require additional inspection tools on the interface, and interface wear caused by additional inspection tools is difficult to avoid, and air tightness loss caused by interface wear It is also difficult to control and detect; for workpieces that require high-precision airtightness or need to operate in special environments such as water environments, the workpiece needs to be sealed after inspection with additional inspection tools, while the airtightness of the sealed interface is general Separate testing is needed to ensure the air tightness of the workpiece, otherwise, if the air tightness problem of the workpiece, it will easily lead to serious product quality problems and safety hazards.

Summary of the invention

In order to solve the above technical problems, the present invention provides an air-tightness detection device, which is used to directly assemble the open end of the workpiece and form a closed space to detect the overall air-tightness. It is characterized in that it includes a mounting seat and an interface valve. The tightness detection device is fixedly connected to the open end of the semi-closed workpiece through the mounting seat and detachably connected to the wall of the workpiece correspondingly. The mounting seat sleeve is provided with at least one sealing ring and abuts against the inner side of the workpiece through the sealing ring interference , The interface valve is adapted to pass through the first through hole extending in the axial direction in the center of the mounting seat and is connected to the inner side of the first through hole through a sealing ring sleeved on the outside of the interface valve. A through hole extends in the same direction and penetrates the second through hole (21) of the interface valve, and the second through hole is used to connect the air pressure test device.

Preferably, the mounting seat is extended outwards with a plurality of protrusions with a predetermined height, the protrusions and the sealing ring are spaced apart on the outer periphery of the mounting seat, and the interface valve extends outwards with a plurality of protrusions with a predetermined height. A sealing ring is provided, and the convex strip and the sealing ring are arranged at intervals on the outer circumference of the interface valve.

Preferably, a thread is provided on the inner side of the interface valve, and the interface valve is correspondingly screwed to the external air pressure detection device through the thread.

Preferably, the air-tightness detection device is further provided with a plugging member for sealing arranged inside the second through hole, and the plugging member is a cylindrical core with a sealing ring sleeved on the outside and tightly abuts against the second through hole through the sealing ring. Inside the hole.

Preferably, the blocking member includes a sealing portion with a sealing ring sleeved on the outer periphery and a connecting portion with threads on the outer periphery and screwed inside the second through hole through the threads.

The present invention also provides a waterproof structure of the lamp body, which has an air tightness detection device, and further includes a waterproof shell and an LED lamp group, wherein the waterproof shell is a semi-closed workpiece with only one end open, and the air tightness detection device is installed in The open end forms a sealable and waterproof accommodation space with the waterproof housing. The LED lamp group is arranged inside the waterproof housing, and the LED lamp group includes an LED bulb and a circuit board electrically connected to the LED bulb.

Preferably, the circuit board is made of a thermally conductive material, the interface valve is penetrated by the first through hole and its length just abuts the circuit board, the outer side of the circuit board is coated with a thermally conductive adhesive, and the thermally conductive adhesive is between Between the interface valve and the circuit board, it is used to dissipate the heat generated by the heating of the LED lamp group faster.

Preferably, the waterproof structure of the lamp body further includes a reflector. The reflector includes a condensing part and a fixing part. The concentrating part is a cylinder with open ends. The LED bulb is installed on one side of the cylinder. The shell is adapted, and the other side of the cylinder is connected with the fixing part and clamped in the waterproof shell through the fixing part.

Preferably, the circuit board is clamped on one side of the reflector barrel and forms a waterproof space with the reflector, the LED bulb is completely accommodated and installed in the waterproof space, and the leads of the LED lamp group are pierced by openings provided on the circuit board Out.

The invention also provides a ship with a waterproof structure of the lamp body.

The present invention also provides an air tightness detection and workpiece sealing method, including the following steps:

In the first step, connect the second through hole (21) with the air pressure test equipment, and turn on the air pump of the air pressure test equipment to perform internal air extraction on the workpiece to be tested;

The second step is to stop pumping when the pressure of the air tightness tester reaches a certain preset pressure value, and hold the pressure for a certain period of time, and determine whether the equipment to be tested is qualified according to the pressure value of the pressure gauge; if the pressure detected by the pressure gauge When the value is lower than the set lower limit, it means the airtightness of the equipment to be tested is unqualified; if the pressure value detected by the pressure gauge is not lower than the set lower limit, it means that the airtightness of the equipment to be tested is qualified;

The third step is to check the air pressure gauge again after the entire system has been allowed to stand for a period of time. If the air pressure does not change, the air tightness is qualified;

Preferably, the airtightness detection and workpiece sealing method further includes a fourth step, that is, removing the airtightness testing equipment, and using a plugging member (5) to seal the inside of the second through hole (21) to complete the workpiece sealing.

The air tightness detection device, the waterproof structure of the lamp body, and the air tightness detection and sealing method provided by the present invention have the following beneficial technical effects:

① The air-tightness detection device provided by the present invention does not need to immerse the product in water, and can detect whether the air-tightness is qualified by operating the high-precision air-tightness detection device to measure the pressure drop within the specified time of the product cavity, and is convenient to operate. Reduce testing costs;

② The air-tightness detection device provided by the present invention is used to directly assemble the open end of the workpiece and form a closed space, thereby forming a component of the sealed cavity of the product to be inspected, and can detect the air-tightness of the interface, which is convenient for detecting wear and tear. Timely maintenance;

③The air-tightness detection device provided by the present invention is provided with two sealing rings on the outer side of the mounting seat and the interference sleeve of the interface valve. The sealing ring undergoes radial and axial deformation due to the extrusion of the wall. On the one hand, the sealing ring The connection with the wall is tighter. On the other hand, the two sealing rings arranged oppositely inside and outside form a mutual force, so that they abut against the wall on both sides, so that the air tightness detection device and the workpiece are further tested. Airtight connection;

④ The airtightness detection device provided by the present invention is also provided with a plugging member for sealing arranged inside the second through hole. The plugging member is a cylindrical core with a number of sealing rings sleeved on the outside and tightly abutted on the sealing ring. Inside the second through hole, the setting of the blocking member enables the air tightness detection device to be directly used to seal the open end of the workpiece to be tested. After the air tightness is detected, there is no need to replace the device or adapt a new blocking element. The sealing operation of the workpiece to be tested can be completed directly on the basis of the air tightness detection device, thereby reducing the possibility of air leakage of the workpiece to be tested at the sealing position, and reducing the air tightness detection steps, inspection and production costs;

⑤The present invention also provides a waterproof structure of the lamp body, the sealing arrangement can not only withstand the preset water pressure, but also can directly test the air tightness through the air tightness detection device. In addition, the circuit board is coated with Thermal conductive glue, which is located between the interface valve and the circuit board, and is used to dissipate the heat generated by the LED bulb to the outside faster;

⑥ The present invention also provides a method for air tightness detection and workpiece sealing, which can effectively ensure the air tightness at the interface, reduce the possibility of poor air tightness, and ensure the overall tightness of the workpiece.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

Figure 1 is a schematic diagram of the explosive structure of the air tightness detection device of the present invention;

Figure 2 is one of the schematic side structural diagrams of the air tightness detection device of the present invention;

Figure 3 is the second schematic diagram of the side structure of the air tightness detection device of the present invention;

4 is a schematic side view of the waterproof structure of the lamp body of the present invention;

5 is a schematic diagram of the explosion structure of the waterproof structure of the lamp body of the present invention;

Symbol description of main components:

1: Mounting seat; 11: First through hole; 2: Interface valve; 21: Second through hole; 3: Seal ring; 4: Protruding strip; 5: Blocking parts; 6: Waterproof housing; 7: LED light Group; 71: LED bulb; 72: circuit board; 8: reflector; 81: condenser part; 82: fixed part

detailed description

Example 1:

With the popularization and application of electronic components and equipment, more and more attention has been paid to the research on the airtightness function. The airtightness has become a necessary and primary quality indicator when electronic components are used in water or dust environments or other special environments.

Most of the existing technologies require products to be placed in a water environment under pressure for air-tightness testing, and many products require additional inspection tools on the interface, and interface wear caused by additional inspection tools is difficult to avoid, and air tightness loss caused by interface wear It is also difficult to control and detect; for workpieces that require high-precision airtightness or need to operate in special environments such as water environments, the workpiece needs to be sealed after inspection with additional inspection tools, while the airtightness of the sealed interface is general Separate testing is needed to ensure the air tightness of the workpiece, otherwise, if the air tightness problem of the workpiece, it will easily lead to serious product quality problems and safety hazards. Therefore, the present invention provides an integrated air-tightness detection device that can be directly assembled on the open end of the workpiece to form a closed space, thereby forming a component of the sealed cavity of the product to be inspected, and can detect the air-tightness of the interface. It is convenient to find wear and repair in time. The specific structure is shown in Figure 1-2. The air tightness detection device includes a mounting seat (1) and an interface valve (2), which are fixedly connected to the semi-closed through the mounting seat (1) The open end of the workpiece is detachably connected to the wall circumference of the workpiece, wherein the mounting seat sleeve is provided with at least one sealing ring (3) and abuts against the inner side of the workpiece through the sealing ring interference, and the interface valve (2) is adapted to penetrate The first through hole (11) extending in the axial direction through the center of the mounting seat is connected to the inner side of the first through hole through a sealing ring (3) sleeved on the outside of the interface valve. A through hole extends in the same direction and penetrates the second through hole (21) of the interface valve, and the second through hole is used to connect the gas pipeline of the air pressure test device. In this embodiment, the seal ring is a rubber seal ring, among which commonly used manufacturing materials are nitrile rubber, neoprene rubber, natural rubber, fluorine rubber, silicone rubber, etc., in other embodiments, the seal ring can also be selected from polymer polytetrafluoroethylene Made of materials such as fluoroethylene or polyurethane.

In order to further rationalize the structure and improve the airtightness of the airtightness detection device and the workpiece to be tested, as shown in Figure 1-2, the mounting seat (1) extends outwards with a number of protrusions (4) of preset heights, convex The strip and the sealing ring (3) are arranged at intervals on the outer periphery of the mounting seat, and the interface valve (2) is extended outwardly with a number of protruding strips (4) of preset height. The protruding strip and the sealing ring (3) are The peripheral interval of the interface valve (2) is set. In this embodiment, the mounting seat and the outer periphery of the interface valve are both provided with two convex strips (4), a sealing ring (3) is arranged between the two convex strips, and another sealing ring is provided on one side of any convex strip (3), so that two convex strips and two sealing rings are arranged at intervals on the outer periphery of the mounting seat (1) and the interface valve (2). Through the two sealing rings set by the interference sleeve, the sealing ring undergoes radial and axial deformation due to the extrusion of the wall. On the one hand, the interface valve (2) and the mounting seat (1) and the mounting seat (1) High airtightness can be obtained with the wall of the workpiece. On the other hand, the two sealing rings (3) arranged oppositely inside and outside form mutual force, so that they abut against the wall on both sides, respectively. During further testing, the air-tightness detection device is connected to the air-tightness of the workpiece.

In order to facilitate the detection operation, the inner side of the interface valve (2) is provided with a thread, and the interface valve is screwed correspondingly to the external air pressure detection device through the thread. In order to improve the air tightness, a sealing ring (3) is also arranged outside the outermost thread to realize the air tight connection between the interface valve and the air supply pipe of the external air pressure detection device.

Example 2:

In order to further enhance the convenience of operation, this embodiment provides an airtightness detection device with a plugging element (5) added on the basis of embodiment 1. As shown in Figure 3, the plugging element (5) is sealed It is arranged inside the second through hole (21), the plugging element is a cylindrical core with a number of sealing rings (3) on the outside and tightly abutting the inside of the second through hole through the sealing ring. The air tightness detection device can be directly used to seal the open end of the workpiece to be tested. After the air tightness is tested, there is no need to replace the device or adapt a new plugging element, and it can be completed directly on the basis of the air tightness detection device The sealing operation of the workpiece to be tested reduces the possibility of air leakage at the blocked position of the workpiece to be tested, and reduces the air tightness testing steps and testing and production costs. In this embodiment, the blocking member (5) includes a sealing portion with a number of sealing rings (3) on the outer circumference and a connecting portion with threads on the outer circumference and screwed on the inner side of the second through hole (21) through the threads. The blocking member is made of rigid material, and the air tightness function is mainly realized by the interference sleeve of the outer sealing ring. In other embodiments, the blocking member may also be made of deformable elastic material.

Example 3:

This embodiment provides a waterproof structure of the lamp body on the basis of the embodiment 1-2. The sealing arrangement can not only withstand the preset water pressure, but also can directly test the air tightness through the air tightness detection device. The specific structure As shown in Figure 4-5, it has an air-tightness detection device, and also includes a waterproof housing (6) and an LED lamp group (7). The waterproof housing (6) is a semi-closed workpiece with only one end open. The tightness detection device is installed at the open end and forms a sealable and waterproof housing space with the waterproof housing. The LED lamp group (7) is arranged inside the waterproof housing. The LED lamp group includes an LED bulb (71) and is electrically connected to the LED bulb. Connected circuit board (72). In order to speed up the heat dissipation and place the LED lamp group to overheat, the circuit board is made of thermally conductive material. The interface valve (2) is penetrated by the first through hole (11) and its length just abuts the circuit board (72). The outer side is coated with thermal conductive glue, which is between the interface valve (2) and the circuit board. The heat generated by the LED lamp group is conducted from the thermal circuit board to the interface valve through the thermal conductive glue, and the interface valve is in contact with the external environment. It can dissipate the heat generated by the LED bulb faster, especially when the outside is a water environment, the flowing water can form a temperature difference on both sides of the waterproof structure of the lamp body, dissipate the internal heat into the water, thereby increasing the lamp body Service life, avoid overheating loss.

Furthermore, as shown in Figure 5, the waterproof structure of the lamp body is further provided with a reflector (8), the reflector includes a light-concentrating part (81) and a fixing part (82), and the light-concentrating part is a cylinder with open ends. The LED bulb (71) is installed in the opening on one side of the cylinder, and the shape of the fixing part is adapted to the waterproof housing (6). The other side of the cylinder is connected with the fixing part and clamped in the waterproof housing through the fixing part. In this embodiment The barrel is a horn-like structure with a narrow side and a wide side. The LED bulb (71) is installed on the narrow side, and the light is emitted from the wider end, which can improve the brightness visually. The waterproof housing (6) is transparent Shell, light can illuminate the underwater environment with higher intensity. In order to further extend the service life of the LED electrical components and avoid short circuit or damage to the electrical components caused by the entry of water vapor, the road board is clamped on the side of the reflector (8) and forms a waterproof space with the reflector. The LED bulb (71) is Completely housed and installed in the waterproof space, the lead wire of the LED bulb is pierced through the opening provided on the circuit board (72), so that the waterproof effect can be further realized without affecting the accuracy of air tightness detection.

Example 4:

The present invention also provides a ship with the waterproof structure of the lamp body, and the waterproof structure of the lamp body is arranged at the front end of the ship. The waterproof structure of the lamp body can not only use its own air tightness test and packaging, but also shows that it has a good pressure holding effect in the water environment (especially the underwater environment) through sampling testing, that is, under higher pressure, it is still It can maintain airtightness and has the property of protecting light-emitting elements.

Example 5:

The invention also provides a method for air tightness detection and workpiece sealing. The air tightness of the product can be detected by operating a high-precision air tightness detection device without immersing the product in water to measure the pressure drop within a predetermined time of the product cavity Qualified, easy to operate, reduce testing costs, the waterproof structure shown in Figure 4 as an example, specifically includes the following steps:

In the second step, when the pressure of the air tightness tester reaches a certain preset air pressure value, stop the inflation and hold the pressure for a certain period of time. According to the pressure value of the pressure gauge, determine whether the air tightness of the equipment to be tested is qualified; When it is lower than the set lower limit, it means that the airtightness of the equipment to be tested is unqualified; if the pressure value detected by the pressure gauge is not lower than the set lower limit, it means that the airtightness of the equipment to be tested is qualified. The technical team of the present invention carried out air-tightness testing on the sealing connection between the air-tightness detection device and the workpiece to be tested, especially the sealing effect of the sealing ring (3) was sampled and tested. The pressure gauge was held at 40MPa for 30 minutes Afterwards, the pressure gauge of 99.9% of the samples stabilized at 0.4Mpa (equivalent to the water pressure of 40 meters underwater), the air tightness met the requirements, and the yield rate was high.

The third step is to check the air pressure gauge again after the whole system is allowed to stand for a period of time. If the air pressure does not change, the air tightness is qualified. Finally, the air tightness test equipment and the interface valve (2) are removed, and the sealing plug is replaced. The plug has no through hole, and since the shape and size of the sealing plug is the same as that of the interface valve (2), it is equivalent to eliminating variables that affect air tightness, thereby reducing the risk of air leakage and water leakage and ensuring air tightness.

Further, improvements were made in the final sealing step, only the air tightness test equipment was removed, and the sealing member (5) was sealed and arranged inside the second through hole (21) to complete the sealing of the workpiece, thereby eliminating the need to remove Lowering or adjusting the position of the interface valve (2) or moving the interface valve (2) can effectively ensure the air tightness of the interface, reduce the possibility of poor air tightness, and ensure the overall tightness of the workpiece.

The airtightness detection device, the waterproof structure of the lamp body, and the airtightness detection and sealing method provided by the present invention are described in detail above. Specific examples are used in this article to illustrate the principles and implementation of the present invention. The above embodiments The description is only used to help understand the core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the ideas and methods of the present invention, there will be changes in the specific implementation and scope of application. In summary The content of this specification should not be construed as a limitation of the present invention.

Claims

An air-tightness detection device, which is used to directly assemble the open end of a workpiece and form a closed space to detect the overall air-tightness. It is characterized by comprising a mounting seat (1) and an interface valve (2), and an air-tightness detection device The mounting seat (1) is fixedly connected to the open end of the semi-closed workpiece and correspondingly detachably connected to the wall of the workpiece, wherein the mounting seat sleeve is provided with at least one sealing ring (3) and abutting on the wall through the sealing ring interference Inside the workpiece, the interface valve (2) fits through the first through hole (11) extending axially in the center of the mounting seat, and is connected to the inside of the first through hole by a sealing ring sleeved on the outside of the interface valve. The center of the interface valve is also provided with a second through hole (21) extending in the same direction as the first through hole and penetrating the interface valve, and the second through hole is used to connect the air pressure test device.
The air-tightness detection device according to claim 1, characterized in that, the mounting seat (1) is provided with a plurality of protrusions (4) with a predetermined height extending outward, and the protrusions and the sealing ring (3) It is arranged at intervals on the outer circumference of the mounting seat. The interface valve (2) is extended outwards with a number of protrusions (4) of preset height and is sleeved with a sealing ring (3). The protrusions and the sealing ring are arranged at intervals on the outer circumference of the interface valve .
The air tightness detection device according to claim 1, characterized in that the inner side of the interface valve (2) is provided with a thread, and the interface valve is screwed to the external air pressure detection device through the thread.
The airtightness detection device according to claim 1, characterized in that it is further provided with a plugging member (5) for sealing the inside of the second through hole (21), and the plugging member is provided with a sealing ring on the outside The cylindrical core of (3) is tightly abutted on the inner side of the second through hole through the sealing ring.
The air-tightness detection device according to claim 4, characterized in that, the blocking member (5) includes a sealing part with a sealing ring (3) on the outer circumference, and a thread on the outer circumference and screwed on the first The connecting part inside the two through holes (21).
A waterproof structure of a lamp body, characterized in that it has the air tightness detection device according to any one of claims 1-5, and further comprises a waterproof housing (6) and an LED lamp group (7), wherein the waterproof housing For a semi-enclosed workpiece with only one open end, the air tightness detection device is installed at the open end and forms a sealable and waterproof housing space with the waterproof housing. The LED lamp group is arranged inside the waterproof housing, and the LED lamp group includes LED bulbs. (71) and a circuit board (72) electrically connected to the LED bulb.
The lamp body waterproof structure according to claim 6, characterized in that the circuit board (72) is made of thermally conductive material, and the interface valve (2) is penetrated by the first through hole (11) and its The length just abuts on the circuit board (72), the outer side of the circuit board is coated with thermal conductive glue, which is between the interface valve and the circuit board, and is used to dissipate the heat generated by the LED lamp group faster. .
The waterproof structure of the lamp body according to claim 6, characterized in that the waterproof structure of the lamp body further comprises a reflector (8), the reflector includes a condensing part (81) and a fixing part (82), and the concentrating part is A barrel with open ends, the LED bulb (71) is installed on one side of the barrel, and the shape of the fixing part is adapted to the waterproof casing (6). The other side of the barrel is connected with the fixing part and clamped by the fixing part In the waterproof housing.
The lamp body waterproof structure according to claim 8, wherein the circuit board (72) is clamped on one side of the reflector (8) and forms a waterproof space with the reflector, and the LED lamp group (71) ) Is completely accommodated and installed in the waterproof space, and the lead wires of the LED lamp group are pierced through the openings provided on the circuit board.
A vessel, characterized by having the waterproof structure of the lamp body according to any one of claims 7-9.
A method for air tightness detection and workpiece sealing, which is characterized in that it comprises the following steps:

The first step is to connect the second through hole (21) according to any one of claims 1-5 to the air pressure test equipment, and turn on the air pump of the air pressure test equipment to perform internal air extraction on the workpiece to be tested;

The second step is to stop pumping when the pressure of the air tightness tester reaches a certain preset pressure value, and hold the pressure for a certain period of time, and determine whether the equipment to be tested is qualified according to the pressure value of the pressure gauge; if the pressure detected by the pressure gauge When the value is lower than the set lower limit, it means the airtightness of the equipment to be tested is unqualified; if the pressure value detected by the pressure gauge is not lower than the set lower limit, it means that the airtightness of the equipment to be tested is qualified;

The third step is to check the air pressure gauge again after the entire system has been allowed to stand for a period of time. If the air pressure does not change, the air tightness is qualified;
The method for airtightness testing and workpiece sealing according to claim 11, further comprising a fourth step, that is, removing the airtightness testing equipment, and using a plugging member (5) to seal the second through hole ( 21) Internal to complete the workpiece sealing.