Plastic pipe compression testing machine

Abstract

The utility model discloses a plastic pipe compression testing machine, and relates to the technical field of plastic pipes. The air inflation device comprises a device body, telescopic mechanisms are symmetrically arranged in the device body, and air inflation parts are arranged at the bottoms of the telescopic mechanisms. After the sealing assembly on the inflating part is in contact with the plastic pipe, the plastic pipe is continuously pushed, and at the moment, gas pre-inflated into the sealing assembly moves from the two ends of the plastic pipe to the inner wall of the plastic pipe under the pushing action. Due to the fact that the gas has compressibility and uniform diffusivity, the space between the inner wall of the plastic pipe and the sealing assembly is gradually filled with the gas under the action of air pressure, the sealing assembly is tightly attached to the inner wall of the plastic pipe, and therefore expansion sealing of the inner wall of the plastic pipe is achieved. According to the sealing mode, the problems that a plastic pipe with a smooth surface is easily clamped and sealed loosely and easily leaks under high pressure in a traditional mechanical clamping and sealing mode are solved, and a sealed cavity can be effectively formed, so that subsequent accurate pressure test operation is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of plastic pipe, and specifically relates to a plastic pipe pressure testing machine. BACKGROUND

[0002] In many fields such as modern industry and building, plastic pipes are widely applied due to many advantages such as light weight, corrosion resistance and low cost. In the production, quality detection and application evaluation process of plastic pipes, pressure testing is a very key link, and through pressure testing, the pressure resistance and sealing performance of the plastic pipe can be effectively detected, so that the safety and reliability in actual use can be ensured.

[0003] Some simple mechanical clamping modes can theoretically exert certain pressure on the pipe end to realize sealing, but in actual operation, for the plastic pipe with a relatively smooth surface, the clamping is not tight, and the sealing failure occurs; moreover, with the increase of the test pressure, the clamping position is prone to leakage, and the requirement of accurate pressure testing cannot be met.

[0004] For the problems in the related art, no effective solution has been proposed at present. CONTENT OF THE UTILITY MODEL

[0005] In view of the problems in the related art, the utility model provides a plastic pipe pressure testing machine to overcome the above technical problems in the prior art.

[0006] To solve the above technical problems, the utility model is realized by the following technical scheme:

[0007] The utility model is a plastic pipe pressure testing machine, which comprises a machine body, a telescopic mechanism is symmetrically arranged in the machine body, an inflation part is arranged at the bottom of the telescopic mechanism, a clamping mechanism is arranged in the inner cavity of the machine body, a sealing assembly is arranged at the top of the clamping mechanism and the bottom of the inflation part, two sealing assemblies are symmetrically arranged, and a plastic pipe is arranged between the two sealing assemblies.

[0008] One end of the plastic pipe is placed on the sealing assembly at the top of the clamping mechanism, and the clamping mechanism is started to rotate, so that the clamping mechanism clamps and limits the plastic pipe, the telescopic mechanism is started to move towards the other end of the plastic pipe, the inflation part and the sealing assembly at the bottom thereof are driven to contact the plastic pipe, and the sealing assembly on the inflation part pushes the plastic pipe, so that the gas in the two sealing assemblies moves towards the inner wall of the plastic pipe from the two ends of the plastic pipe, and the inner wall of the plastic pipe is inflated and sealed.

[0009] Further, the telescopic mechanism comprises a telescopic rod, the telescopic rod is fixedly installed at the top of the machine body, an output shaft is fixedly installed at the output end of the telescopic rod, the output shaft penetrates through the machine body and extends into the machine body.

[0010] Further, the other end of the output shaft is fixedly installed with a moving plate, the top of the moving plate is symmetrically fixedly installed with moving rods, and the two moving rods are slidingly installed at the top of the machine body.

[0011] Further, the air charging member comprises a connecting piece, the connecting piece is fixedly installed at the bottom of the moving plate, one end of the connecting piece is communicated with an air inlet pipe, and the bottom of the connecting piece is communicated with an air outlet pipe, and the air outlet pipe is located in the inner cavity of the plastic pipe.

[0012] Further, the clamping mechanism comprises a connecting frame, the connecting frame is fixedly installed on the machine body, a rotating block is rotatably installed at the bottom of the connecting frame, and rotating rods are rotatably installed at the four corners of the rotating block.

[0013] Further, the other end of the rotating rod is rotatably installed with a clamping block, the clamping block is slidingly installed on the connecting frame, a sliding groove is formed in the connecting frame for slidingly installing the clamping blocks, a driving motor is fixedly installed at the bottom of the rotating block, the driving motor is fixedly installed on the machine body, a sliding block is slidingly installed at one end of the plastic pipe close to the clamping blocks, and the sliding blocks are located on the outer wall of the plastic pipe.

[0014] Further, the two sealing assemblies each comprise a fixed plate, the two fixed plates are located at the upper and lower ends of the plastic pipe, and the two fixed plates are fixedly installed at the bottom of the connecting piece and the top of the connecting frame, an air bag is fixedly installed on the outer wall of the two fixed plates, one end of the air bag is communicated with a plurality of communication pipes, the other end of the communication pipes is communicated with a sealing ring, the sealing ring is fixedly installed on the fixed plate, and the two sealing rings are located in the inner cavity of the plastic pipe.

[0015] The utility model has the following beneficial effects:

[0016] 1. The utility model discloses a sealing assembly on the inflatable part is contacted with the plastic tube, continues to push the plastic tube, the gas that the sealing assembly is filled in beforehand moves to the inner wall of plastic tube by two ends of plastic tube under this pushing effect respectively at this moment. Because the gas has compressibility and uniform diffusivity, under the action of air pressure, the gas gradually fills the space between the inner wall of plastic tube and sealing assembly, makes sealing assembly and the inner wall of plastic tube closely fit, thereby realizes the inflation seal on the inner wall of plastic tube. This sealing mode overcomes the problem that traditional mechanical clamping is easy to clamp tightly and leak under high pressure for the smooth surface plastic tube, can effectively form a sealed cavity, so that subsequent accurate pressure test operation is carried out.

[0017] 2. The utility model discloses the cylinder of external gas source starts working, fills the gas in inflatable part, and subsequently the gas is entered into plastic tube through inflatable part, makes the internal pressure of plastic tube gradually rise, in this process, pressure test system closely monitors the change situation of plastic tube internal pressure value. With the continuous rise of pressure, whether the phenomenon such as rupture, deformation or leakage of plastic tube appears is observed, to accurately judge the pressure resistance of plastic tube.

[0018] Of course, any product implementing the utility model does not necessarily need to achieve all the advantages described above. DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will be needed to use the drawing described simply introduces, obviously, the drawing in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, still can obtain other drawings according to these drawings.

[0020] Figure 1 It is the three-dimensional structure diagram of the utility model;

[0021] Figure 2 It is the telescopic mechanism schematic diagram of the utility model;

[0022] Figure 3 It is the moving plate schematic diagram of the utility model;

[0023] Figure 4 It is the air outlet pipe schematic diagram of the utility model;

[0024] Figure 5 It is the inflatable part explosion view of the utility model;

[0025] Figure 6 It is the sealing assembly schematic diagram of the utility model;

[0026] Figure 7 It is the driving motor schematic diagram of the utility model;

[0027] Figure 8 The fixed plate of the utility model is a schematic view.

[0028] In the drawings, the components represented by each reference numeral are listed as follows:

[0029] 1, machine body; 2, telescopic mechanism; 201, telescopic rod; 202, output shaft; 203, moving plate; 204, moving rod; 3, inflatable part; 301, connecting piece; 302, air inlet pipe; 303, air outlet pipe; 4, clamping mechanism; 401, connecting frame; 402, rotating block; 403, rotating rod; 404, clamping block; 406, driving motor; 407, sliding block; 5, sealing assembly; 501, fixed plate; 502, air bag; 503, communication pipe; 504, sealing ring; 6, plastic pipe. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0031] In the description of the utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner" and the like indicate the orientation or positional relationship, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated components or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the utility model.

[0032] Please refer to Figures 1-8 The utility model discloses a plastic pipe pressure testing machine, including machine body 1, the inside symmetry of machine body 1 is equipped with telescopic mechanism 2, the bottom of telescopic mechanism 2 is equipped with inflatable part 3, the inner chamber of machine body 1 is equipped with clamping mechanism 4, the top of clamping mechanism 4 with the bottom of inflatable part 3 all is equipped with sealing assembly 5, two sealing assembly 5 is symmetrically set up, and the plastic pipe 6 is arranged between two sealing assembly 5.

[0033] The one end of the plastic pipe 6 is placed on the sealing assembly 5 on the top of the clamping mechanism 4, and the clamping mechanism 4 is started to rotate to clamp and position the plastic pipe 6, the telescopic mechanism 2 is started to move towards the other end of the plastic pipe 6, and the inflatable member 3 and the sealing assembly 5 at the bottom thereof are brought into contact with the plastic pipe 6, and the sealing assembly 5 on the inflatable member 3 pushes the plastic pipe 6, so that the gas in the two sealing assemblies 5 moves to the inner wall of the plastic pipe 6 from the two ends thereof, and the inner wall of the plastic pipe 6 is inflated and sealed.

[0034] In operation, first, one end of the plastic pipe 6 to be tested is placed on the sealing assembly 5 on the top of the clamping mechanism 4, and then the clamping mechanism 4 is started to rotate, at this time, the internal components of the clamping mechanism 4 are respectively moved towards the outer wall of the plastic pipe 6, so as to stably clamp and position the plastic pipe 6, and ensure that the end position is fixed and the sealing assembly 5 is preliminarily attached to the end of the plastic pipe 6. Then, the telescopic mechanism 2 is started to move towards the other end of the plastic pipe 6, and in the moving process, the inflatable member 3 and the sealing assembly 5 at the bottom thereof gradually move close to and contact the plastic pipe 6. When the sealing assembly 5 on the inflatable member 3 contacts the plastic pipe 6, the plastic pipe 6 is continuously pushed, at this time, the gas pre-filled in the sealing assembly 5 moves to the inner wall of the plastic pipe 6 from the two ends thereof under the pushing action. Due to the compressibility and uniform diffusivity of the gas, under the action of gas pressure, the gas gradually fills the space between the inner wall of the plastic pipe 6 and the sealing assembly 5, so that the sealing assembly 5 is tightly attached to the inner wall of the plastic pipe 6, thereby achieving the inflation sealing of the inner wall of the plastic pipe 6. This sealing method overcomes the problem that the traditional mechanical clamping is easy to clamp loosely and leak under high pressure for the plastic pipe with smooth surface, and can effectively form a sealed cavity for subsequent precise pressure test operation. The gas cylinder connected to the outside air source starts to work to fill the inflatable member 3 with gas, and then the gas enters the plastic pipe 6 through the inflatable member 3, so that the internal pressure of the plastic pipe 6 gradually rises. In this process, the pressure test system closely monitors the change of the internal pressure value of the plastic pipe 6. With the continuous rise of the pressure, whether the plastic pipe 6 appears to be broken, deformed or leaked is observed, so as to accurately judge the pressure resistance of the plastic pipe.

[0035] In one embodiment, for the telescopic mechanism 2 described above, the telescopic mechanism 2 comprises a telescopic rod 201 fixedly installed on the top of the machine body 1, and an output shaft 202 fixedly installed at the output end of the telescopic rod 201, the output shaft 202 penetrates through the machine body 1 and extends into the inside thereof.

[0036] The other end of the output shaft 202 is fixedly installed with a moving plate 203, the top of the moving plate 203 is symmetrically fixedly installed with moving rods 204, and the two moving rods 204 are slidingly installed on the top of the machine body 1.

[0037] When the telescopic mechanism 2 needs to be started, the output shaft 202 connected with the output end moves synchronously with the telescopic rod 201. Since the output shaft 202 penetrates through the machine body 1 and extends into the inside, when the output shaft 202 moves in the up-down direction, the moving plate 203 fixedly installed at the other end thereof moves synchronously up and down. The moving rods 204 symmetrically installed on the top of the moving plate 203 ensure that the moving plate 203 does not deviate or shake during the up-down movement, and can only move in the predetermined straight line direction.

[0038] In an embodiment, for the above-mentioned inflatable member 3, the inflatable member 3 comprises a connecting piece 301 fixedly installed on the bottom of the moving plate 203, one end of the connecting piece 301 is communicated with an air inlet pipe 302, and the bottom of the connecting piece 301 is communicated with an air outlet pipe 303 located in the inner cavity of the plastic pipe 6.

[0039] The external air source is communicated with the connecting piece 301 through the air inlet pipe 302, and the gas enters the connecting piece 301 under the pushing of the air source pressure. The connecting piece 301 serves as a transfer hub for the gas, and then the gas flows out from the air outlet pipe 303 at the bottom of the connecting piece 301. Since the air outlet pipe 303 is located in the inner cavity of the plastic pipe 6, the flowing gas directly enters the inside of the plastic pipe 6. On the basis of the preliminary sealing of the plastic pipe 6 by the sealing assembly 5 driven by the telescopic mechanism 2, the gas entering the plastic pipe 6 gradually increases the internal pressure thereof. With the continuous filling of the gas, the internal pressure of the plastic pipe 6 continuously rises, thereby realizing the test of the pressure resistance of the plastic pipe 6. During the test, the pressure change in the inside of the plastic pipe 6 can be accurately controlled by adjusting the gas supply pressure, flow rate of the external air source and controlling the inflation time and other parameters, and then the performance of the plastic pipe 6 under different pressure conditions can be evaluated, such as the deformation degree of the pipe wall, whether there is leakage or rupture, etc., so as to judge whether the plastic pipe 6 meets the corresponding quality standards and use requirements.

[0040] In an embodiment, for the above-mentioned clamping mechanism 4, the clamping mechanism 4 comprises a connecting frame 401 fixedly installed on the machine body 1, a rotating block 402 rotatably installed on the bottom of the connecting frame 401, and rotating rods 403 rotatably installed on the four corners of the rotating block 402.

[0041] The other end of the rotating rod 403 is rotatably installed with a clamping block 404, the clamping block 404 is slidably installed on the connecting frame 401, the connecting frame 401 is provided with sliding grooves for slidably installing a plurality of clamping blocks 404, the bottom of the rotating block 402 is fixedly installed with a driving motor 406, the driving motor 406 is fixedly installed on the machine body 1, and the end of the plurality of clamping blocks 404 close to the plastic pipe 6 is slidably installed with a sliding block 407, and the plurality of sliding blocks 407 are located on the outer wall of the plastic pipe 6.

[0042] The plastic pipe 6 is sleeved on the sealing assembly 5 on the connecting frame 401, in the initial state, a plurality of clamping blocks 404 are in the open position, the spacing between the sliding blocks 407 thereof is greater than the outer diameter of the plastic pipe 6, so as to place the plastic pipe 6 in a suitable position, when it is necessary to clamp the plastic pipe 6, the driving motor 406 fixedly installed on the machine body 1 and located at the bottom of the rotating block 402 is started, the driving motor 406 starts to operate and drives the rotating block 402 to rotate around the rotating connection point of the rotating block 402 and the connecting frame 401, with the rotation of the rotating block 402, the rotating rods 403 at the four corners change the angle accordingly since one end thereof is rotatably connected with the rotating block 402. The other end of the rotating rod 403 is rotatably connected with the clamping block 404, and the clamping block 404 is limited to straight-line sliding in the sliding groove of the connecting frame 401. The change of the angle of the rotating rod 403 drives the clamping block 404 to slide in the sliding groove of the connecting frame 401 towards the direction of the plastic pipe 6, in the process of the clamping block 404 approaching the plastic pipe 6, the sliding block 407 installed at the end of the clamping block 404 close to the plastic pipe 6 contacts and clamps the outer wall of the plastic pipe 6, ensuring that the plastic pipe 6 does not shift or shake during the test, and ensuring the accuracy and reliability of the test results. Since the sliding block 407 is slidably installed on the clamping block 404, after contacting the plastic pipe 6, the sliding block 407 allows the plastic pipe 6 to be pushed only in the vertical direction.

[0043] In one embodiment, for the above-mentioned sealing assembly 5, the sealing assembly 5 comprises a fixed plate 501, two fixed plates 501 are located at the upper and lower ends of the plastic pipe 6, and the two fixed plates 501 are fixedly installed at the bottom of the connecting piece 301 and the top of the connecting frame 401, the outer wall of the fixed plate 501 is fixedly installed with an air bag 502, one end of the air bag 502 is communicated with a plurality of communication pipes 503, the other end of the plurality of communication pipes 503 is communicated with a sealing ring 504, the sealing ring 504 is fixedly installed on the fixed plate 501, and the two sealing rings 504 are located in the inner cavity of the plastic pipe 6.

[0044] When the sealing operation is not performed on the plastic tube 6, the sealing assembly 5 is in a standby state, the plastic tube 6 is sleeved on the sealing ring 504 on the connecting frame 401, at this time, the air bags 502 are pre-charged with a certain amount of gas to maintain their basic shape, when the telescopic rod 201 pushes the moving plate 203 and the connecting piece 301 to move towards the plastic tube 6, the sealing ring 504 on the connecting piece 301 enters the inner cavity of the plastic tube 6, at this time, the two air bags 502 are located at the upper and lower ends of the plastic tube 6, with the continuous pushing of the telescopic rod 201, the connecting piece 301 pushes the air bags 502 and the plastic tube 6 towards the air bags 502 on the connecting frame 401, because the sliding block 407 is slidingly installed with the clamping block 404, at this time, the sliding block 407 on the outer wall of the plastic tube 6 plays a guiding role, then the two air bags 502 are extruded and deformed, the gas in the air bags 502 flows to the sealing ring 504 through the communication pipe 503, the gas flowing into the sealing ring 504 makes it expand rapidly, the sealing ring 504 originally closely attached to the fixed plate 501 begins to stretch towards the inner wall of the plastic tube 6 and closely attach to it. Because the two sealing rings 504 are located at the upper and lower ends of the inner cavity of the plastic tube 6, their expansion can form two sealing lines in the inner cavity of the plastic tube 6, on the one hand, the elastic deformation of the sealing ring 504 makes it closely contact with the inner wall of the plastic tube 6, filling the possible small gap and preventing the gas from leaking between the pipe wall and the sealing ring 504; on the other hand, the gas continuously supplemented to the sealing ring 504 from the air bags 502 through the communication pipe 503 maintains the expansion state and sealing pressure of the sealing ring 504, ensuring that the sealing effect is continuously maintained during the entire pressure test.

[0045] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] The preferred embodiments of the utility model disclosed above are only used for helping to explain the utility model. The preferred embodiments do not describe all the details and limit the utility model to the specific embodiments described. Obviously, according to the content of the present specification, many modifications and changes can be made. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that the persons skilled in the art can well understand and utilize the utility model. The utility model is only limited by the claims and the entire scope and equivalents thereof.

Claims

1. A plastic pipe pressure tester comprising a body (1) characterised in that: The inside of the machine body (1) is symmetrically provided with a telescopic mechanism (2), the bottom of the telescopic mechanism (2) is provided with an inflation member (3), the inner cavity of the machine body (1) is provided with a clamping mechanism (4), the top of the clamping mechanism (4) and the bottom of the inflation member (3) are both provided with a sealing assembly (5), two sealing assemblies (5) are symmetrically arranged, and a plastic tube (6) is arranged between the two sealing assemblies (5). One end of the plastic tube (6) is placed on the sealing assembly (5) on the top of the clamping mechanism (4), and the clamping mechanism (4) is started to rotate, so that the clamping mechanism (4) clamps and limits the plastic tube (6), the telescopic mechanism (2) is started to move towards the other end of the plastic tube (6), the inflation member (3) and the sealing assembly (5) at the bottom thereof are driven to contact the plastic tube (6), and the sealing assembly (5) on the inflation member (3) pushes the plastic tube (6), so that the gas in the two sealing assemblies (5) moves to the inner wall of the plastic tube (6) from the two ends of the plastic tube (6) respectively, and the inner wall of the plastic tube (6) is inflated and sealed.

2. The plastic pipe pressure tester of claim 1, wherein, The telescopic mechanism (2) comprises a telescopic rod (201), the telescopic rod (201) is fixedly installed on the top of the machine body (1), and the output end of the telescopic rod (201) is fixedly installed with an output shaft (202).

3. A plastic pipe pressure tester according to claim 2, wherein The other end of the output shaft (202) is fixedly installed with a moving plate (203), the top of the moving plate (203) is symmetrically fixedly installed with a moving rod (204), and the two moving rods (204) are slidingly installed on the top of the machine body (1).

4. A plastic pipe pressure tester according to claim 3, wherein The inflation member (3) comprises a connecting piece (301), the connecting piece (301) is fixedly installed on the bottom of the moving plate (203), one end of the connecting piece (301) is communicated with an air inlet pipe (302), and the bottom of the connecting piece (301) is communicated with an air outlet pipe (303).

5. A plastic pipe pressure tester according to claim 4, wherein The clamping mechanism (4) comprises a connecting frame (401), the connecting frame (401) is fixedly installed on the machine body (1), the bottom of the connecting frame (401) is rotatably installed with a rotating block (402), and the four corners of the rotating block (402) are rotatably installed with rotating rods (403).

6. A plastic pipe pressure tester according to claim 5, wherein The other end of the rotating rod (403) is rotatably installed with a clamping block (404), the clamping block (404) is slidingly installed on the connecting frame (401), a plurality of sliding grooves for slidingly installing the clamping blocks (404) are formed in the connecting frame (401), the bottom of the rotating block (402) is fixedly installed with a driving motor (406), the driving motor (406) is fixedly installed on the machine body (1), and a sliding block (407) is slidingly installed on one end of the plastic tube (6) close to the plastic tube (6).

7. A plastic pipe pressure tester according to claim 6, wherein Both the sealing assemblies (5) comprise a fixed plate (501), both the fixed plates (501) are located at upper and lower ends of the plastic pipe (6), and both the fixed plates (501) are fixedly installed at bottoms of the connecting pieces (301) and tops of the connecting frames (401), outer walls of both the fixed plates (501) are fixedly installed with air bags (502), one end of each air bag (502) is communicated with a plurality of communicating pipes (503), the other end of each communicating pipe (503) is communicated with a sealing ring (504), the sealing ring (504) is fixedly installed on the fixed plate (501), and both the sealing rings (504) are located in the inner cavity of the plastic pipe (6).

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