CN219235082U - Exhaust pipe leakage test clamp - Google Patents

Abstract

The utility model relates to the technical field of exhaust pipe air tightness detection, and discloses an exhaust pipe leakage testing clamp which comprises a clamping seat and a bracket arranged on the clamping seat, wherein three groups of clamping components are arranged on the bracket, the clamping seat is used for supporting an exhaust pipe, one group of clamping components are used for limiting the exhaust pipe from the upper part, the other two groups of clamping components are used for limiting the exhaust pipe from two sides of the exhaust pipe respectively, the three groups of clamping components synchronously move and have equal clamping pressure on the exhaust pipe, the clamping pressure can be adjusted, on one hand, the three groups of clamping components synchronously move to improve the clamping efficiency, and on the other hand, a worker can adjust the clamping pressure of the clamping components according to the shape and the size of the exhaust pipe and production materials so as to avoid the outer wall of the exhaust pipe from sinking caused by transitional clamping or unstable clamping caused by too small clamping pressure.

Description

Exhaust pipe leakage test clamp

Technical Field

The utility model relates to the field of exhaust pipe air tightness detection, in particular to a leakage testing clamp.

Background

The blast pipe is one kind of automobile parts, and after its production, need to carry out gas tightness detection to it, leak test promptly, among the prior art, generally carry out the centre gripping to the blast pipe earlier, then shutoff blast pipe's both ends and to its inside inflation, wait for the time of predetermineeing, judge the gas tightness of blast pipe according to the atmospheric pressure change, need use special gas tightness anchor clamps when the blast pipe centre gripping.

The applicant finds a Chinese patent utility model with application publication number of CN104227607A through search, which discloses an exhaust pipe leakage testing clamp, which records: the quick clamping and positioning of the automobile exhaust pipe can be realized, and the clamping and positioning efficiency is improved; from this, it is known that it is necessary to improve the clamping efficiency of the airtight clamp to the exhaust pipe, but it has the following drawbacks: the exhaust pipe is supported by the containing groove, the exhaust pipe is clamped by the pressing plate, the shape of the exhaust pipe is generally approximate to a circle, the pressing plate is in point contact with the exhaust pipe support, namely, a comparison file is clamped in a point contact mode, the clamping points are only one, and the clamping stability is poor.

Disclosure of Invention

In order to solve the problems mentioned in the background, the utility model provides an exhaust pipe leakage testing clamp.

In order to achieve the technical purpose, the technical scheme adopted by the utility model is as follows.

The utility model provides an blast pipe leak test anchor clamps, it includes the holder and sets up the support on the holder, is provided with three sets of clamping part on the support, and the holder is used for bearing blast pipe, and a set of clamping part is used for spacing the blast pipe from the top, and two sets of clamping part are spacing the blast pipe from the both sides of blast pipe respectively in addition, and three sets of clamping part synchronous movement and the clamping pressure to the blast pipe equals, and clamping pressure can be adjusted.

Further, the clamping component comprises a pump shell arranged on the support, an end cover is arranged at the open end of the pump shell, the closed end faces towards an exhaust pipe arranged on the clamping seat, a connector is arranged on the end cover, a first piston is mounted in the pump shell in a sliding mode, a piston rod is coaxially arranged on the end face of the first piston, the other end of the piston rod extends out of the pump shell and is provided with a clamping plate, and a second spring is arranged between the closed end of the pump shell and the first piston.

Further, a piston II is arranged in the pump shell in a sliding manner and positioned between the piston I and the end cover, a spring I is arranged between the piston I and the piston II, and the elastic coefficient of the spring I is larger than that of the spring II.

Further, the clamping plate is detachably connected with the piston rod.

Further, the free end face of the clamping plate is in an arc face shape.

Further, a rubber layer is arranged on the end face of the free end of the clamping plate.

Further, a communication component is arranged among the three groups of clamping components, the communication component comprises a four-way pipe, the four-way pipe is provided with four pipe orifices, the three pipe orifices are respectively communicated with the connectors in the three clamping components through air pipes, and the rest pipe orifices are communicated with the air compressor through connecting pipes.

Further, a pressure gauge, a pressure release valve and a deflation valve are arranged on the connecting pipe.

Compared with the prior art, the utility model has the beneficial effects that:

in this scheme, through the holder bearing blast pipe, a set of clamping part is spacing to the blast pipe from the top, two sets of clamping part are spacing to the blast pipe from the both sides of blast pipe respectively in addition, the four direction of realization blast pipe all receives spacingly, improve the centre gripping stability to the blast pipe, in addition, three sets of clamping part are synchronous movement and equal to the clamping pressure of blast pipe, clamping pressure can be adjusted, on the one hand, three sets of clamping part synchronous movement can improve clamping efficiency, on the other hand, the staff can adjust the clamping pressure of clamping part according to the shape size and the production material of blast pipe, in order to avoid transition centre gripping to cause the outer wall of blast pipe to take place to dent, or clamping pressure is too little to lead to the centre gripping unstable;

in addition, in the scheme, compressed gas is adopted for clamping, when any clamping plate is in contact with the exhaust pipe, the compressed gas continuously flows into the other two groups of clamping parts, and until the clamping plates in the three groups of clamping parts are in contact with the exhaust pipe, the compressed gas continuously flows, flexible pushing is applied to the clamping plates, so that the exhaust pipe can be flexibly clamped, that is, the exhaust pipe can be randomly placed when being placed on the clamping seat, the self-centering can be realized through the matching of the three groups of clamping parts, the clamping pressure can be continuously applied after the self-centering is finished, and the exhaust pipe is flexibly clamped, so that the inconvenience in moving the exhaust pipe caused by the fact that one clamping plate clamps the exhaust pipe than the other two clamping plates in advance in the self-centering process is avoided, and the self-centering cannot be realized;

in addition, the setting of relief valve can prevent that excessive centre gripping from causing the blast pipe surface to cave in, in addition, during the in-service use, the quantity of compressed air injection can be more than preset value, has the existence of relief valve, and unnecessary compressed air can be discharged to the quantity of compressed air injection is less than preset value, can not obtain anticipated centre gripping effect.

Drawings

FIG. 1 is a schematic illustration of the present utility model;

FIG. 2 is a schematic view of a communication member;

FIG. 3 is a schematic view of a clamping member;

fig. 4 is an internal schematic view of the clamping member.

The reference numerals in the drawings are:

1. a clamping seat; 2. a bracket; 3. a clamping member; 301. a pump housing; 302. a nozzle; 303. a first piston; 304. a second piston; 305. a piston rod; 306. a first spring; 307. a second spring; 308. a clamping plate; 309. a joint; 4. an air pipe; 5. a four-way pipe; 6. a connecting pipe; 7. a pressure gauge; 8. and a pressure release valve.

Detailed Description

In order to further describe the technical means and effects adopted by the present utility model for achieving the intended purpose, the following detailed description will refer to the specific implementation, structure, characteristics and effects according to the present utility model with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1-4, an exhaust pipe leakage testing clamp comprises a clamping seat 1 and a support 2 arranged on the clamping seat 1, wherein three groups of clamping components 3 are arranged on the support 2, the clamping seat 1 supports an exhaust pipe, one group of clamping components 3 are used for limiting the exhaust pipe from the upper side, the other two groups of clamping components 3 are used for limiting the exhaust pipe from two sides of the exhaust pipe respectively, the four groups of clamping components are mutually matched, limitation of the exhaust pipe in four directions is achieved, clamping stability of the exhaust pipe is improved, in addition, the three groups of clamping components 3 synchronously move and clamping pressure of the exhaust pipe is equal, and the clamping pressure can be adjusted.

Specifically, as shown in fig. 3, the clamping member 3 includes a pump housing 301 mounted on a bracket 2, an end cover is provided at an open end of the pump housing 301, a closed end faces an exhaust pipe placed on the clamping seat 1, a nozzle 302 is provided on the end cover, and two pistons are slidably mounted in the pump housing 301: the pump shell 301 is further provided with a first spring 306 positioned between the two pistons and a second spring 307 positioned between the closed end of the pump shell 301 and the first piston 303, and the elastic coefficient of the first spring 306 is larger than that of the second spring 307.

A piston rod 305 is coaxially provided at an end surface of the first piston 303, and the other end of the piston rod 305 extends out of the pump housing 301 and is provided with a clamping plate 308.

Compressed gas flows into the pump shell 301 through the connector 302, firstly, the piston II 304 drives the piston I303 to move through the spring I306 as a transmission medium, the spring II 307 is compressed, the piston I303 moves with the piston rod 305 and the clamping plate 308 to clamp the exhaust pipe, then the compressed gas is continuously injected into the pump shell 301 by a preset amount, the piston I303 does not move any more due to the contact of the clamping plate 308 with the exhaust pipe, the piston II 304 moves, and the spring I306 is compressed, on one hand, the spring I306 serves as a buffer medium, the flexible pushing of the piston I303 is realized, the flexible clamping of the exhaust pipe is further realized, and on the other hand, the compression elasticity of the spring I306 pushes the piston I303, so that the clamping plate 308 pushes the exhaust pipe, and the clamping stability is further improved.

Preferably, the clamping plate 308 is provided with a joint 309, and the joint 309 is detachably connected to the piston rod 305, for example, by a threaded connection, in the sense that the clamping plate 308 can be quickly replaced according to the actual situation.

Preferably, the free end surface of the clamping plate 308 is in a cambered surface shape, which is in the meaning of matching with the shape of the exhaust pipe, so that the contact area between the clamping plate 308 and the exhaust pipe is increased as much as possible, and the clamping stability of the clamping plate 308 on the exhaust pipe is further improved.

Preferably, the free end face of the clamping plate 308 is provided with a rubber layer, which has the meaning of having elastic deformation capability to prevent the clamping plate 308 from scraping the coating on the surface of the exhaust pipe, and increasing friction force and clamping stability.

Further, as shown in fig. 1 and fig. 2, a communication component is disposed between the three groups of clamping components 3 and is used for communication between the three groups of clamping components and a driving source, the driving source is compressed air, for example, an air compressor, the communication component comprises a four-way pipe 5, the four-way pipe 5 is realized in the prior art and is provided with four pipe openings, wherein the three pipe openings are respectively communicated with the joints 302 in the three clamping components 3 through air pipes 4, the communication between the remaining pipe opening and the driving source is realized through a connecting pipe 6, a pressure gauge 7 and a pressure relief valve 8 are disposed on the connecting pipe 6, the pressure relief valve 8 is used for relieving pressure after the air pressure in the connecting pipe 6 exceeds a preset value, so that the maximum air pressure in the connecting pipe 6 does not exceed the preset value, and the preset value of the pressure relief valve 8 is adjustable.

The working principle of the utility model is as follows:

firstly, the exhaust pipe is placed on the clamping seat 1, compressed gas flows into the pump shell 301 in the three groups of clamping components 3 through the connecting mouth 302 at the same time, the clamping plates 308 are driven to move towards the exhaust pipe, when any clamping plate 308 is contacted with the exhaust pipe, the compressed gas continuously flows into the other two groups of clamping components 3, until the clamping plates 308 in the three groups of clamping components 3 are contacted with the exhaust pipe, the compressed gas continuously flows, flexible pushing is applied to the clamping plates 308, further flexible clamping of the exhaust pipe is realized, after the airtightness detection of the exhaust pipe is finished, the exhaust pipe can be deflated through a deflation valve arranged on the connecting pipe 6, the first and second release elastic forces of the springs enable the clamping components 3 to reset and release the clamping, and the prior electromagnetic valve technology of the deflation valve can be realized, which is not shown in the figure and is not repeated.

In the above process, the pressure gauge 7 can check the air pressure in the connecting pipe 6, so as to calculate the clamping pressure applied to the exhaust pipe by the clamping plate 308;

in the above process, the setting of the pressure release valve 8 can prevent excessive clamping from causing the surface depression of the exhaust pipe, in addition, during actual use, the injection amount of compressed air needs to be superfluous to preset value, and the existence of the pressure release valve 8 can drain superfluous compressed air so as to prevent the injection amount of compressed air from being less than the preset value, and the expected clamping effect can not be obtained.

In the process, the two groups of pistons and the two groups of springs are arranged, so that the exhaust pipe is flexibly clamped.

During the clamping process, the volume of the pump housing 301 in the area between the first piston 303 and the closed end is gradually reduced, and an air hole may be provided in the pump housing 301 for communication between the area and the outside.

The present utility model is not limited to the above embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present utility model.

Claims (8)

1. The utility model provides an blast pipe leak test anchor clamps, its includes cassette (1) and sets up support (2) on cassette (1), its characterized in that: be provided with three clamping part (3) of group on support (2), cassette (1) are used for bearing blast pipe, and a set of clamping part (3) are used for spacing the blast pipe from the top, and two sets of clamping part (3) are spacing the blast pipe from the both sides of blast pipe respectively in addition, and three clamping part (3) synchronous movement and the clamping pressure to the blast pipe equals, and clamping pressure can be adjusted.

2. The exhaust pipe leak testing fixture of claim 1, wherein: the clamping part (3) comprises a pump shell (301) arranged on the support (2), an end cover is arranged at the open end of the pump shell (301), the closed end faces towards an exhaust pipe arranged on the clamping seat (1), a joint mouth (302) is arranged on the end cover, a piston I (303) is arranged in the pump shell (301) in a sliding mode, a piston rod (305) is coaxially arranged on the end face of the piston I (303), the other end of the piston rod (305) extends out of the pump shell (301) and is provided with a clamping plate (308), and a spring II (307) is arranged between the closed end of the pump shell (301) and the piston I (303).

3. The exhaust pipe leak testing fixture of claim 2, wherein: a piston II (304) positioned between the piston I (303) and the end cover is also slidably arranged in the pump shell (301), a spring I (306) is arranged between the piston I (303) and the piston II (304), and the elastic coefficient of the spring I (306) is larger than that of the spring II (307).

4. The exhaust pipe leak testing fixture of claim 2, wherein: the clamping plate (308) is detachably connected with the piston rod (305).

5. The exhaust pipe leak testing fixture of claim 2, wherein: the free end surface of the clamping plate (308) is in a cambered surface shape.

6. The exhaust pipe leak testing fixture of claim 2, wherein: the free end face of the clamping plate (308) is provided with a rubber layer.

7. An exhaust pipe leak testing fixture as defined in claim 3, wherein: the three groups of clamping components (3) are provided with communication components, each communication component comprises a four-way pipe (5), each four-way pipe (5) is provided with four pipe orifices, the three pipe orifices are respectively communicated with the joint nozzles (302) in the three clamping components (3) through air pipes (4), and the rest pipe orifices are communicated with the air compressor through connecting pipes (6).

8. The exhaust pipe leak testing fixture of claim 7, wherein: the connecting pipe (6) is provided with a pressure gauge (7), a pressure relief valve (8) and a deflation valve.

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