Plastic pipe longitudinal retraction rate detection device

Abstract

The utility model relates to the technical field of pipe detection, in particular to a device for detecting the longitudinal retraction rate of a plastic pipe. According to the device for detecting the longitudinal retraction rate of the plastic pipe, the technical problems of low detection precision and inconvenience in operation of the device for detecting the longitudinal retraction rate of the pipe in the prior art are solved. A device for detecting the longitudinal retraction rate of a plastic pipe comprises a box body, a heating cavity is formed in the box body, and the box body is further provided with a containing frame for containing a pipe to be detected; by arranging the balancing weight, the balancing weight is used for applying certain pressure to the pipe to be detected, so that the pipe can simulate the actual working environment more truly in the detection process, and the detection precision is improved. The placing frame is inserted into the heating cavity, and the whole placing frame can be conveniently pulled out after the to-be-detected pipe is heated in the heating cavity, so that the heated pipe leaves the heating cavity, the heated pipe can be conveniently taken out, and potential safety hazards are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe detection, in particular to a device for detecting the longitudinal shrinkage rate of a plastic pipe. Background Art

[0002] Plastic pipes are mostly under stress during use. For example, pipes used for vertical drainage drain from the upper part of the floor to the bottom of the floor. They are installed vertically from the upper floor to the ground. During use, each part of the pipe must bear the pressure transmitted by the connected upper pipe. The existing testing method is based on the national standard GB / T6671-2001. During the test, the prepared sample is hung in the aging box, kept warm at the set temperature for a certain period of time, and then taken out. After it is completely cooled, the longitudinal shrinkage rate is measured.

[0003] Prior art methods for testing the longitudinal shrinkage of pipes fail to consider the stress conditions of the pipes, resulting in low accuracy. Furthermore, after testing, the pipes used in prior art testing devices are difficult to remove from the aging chamber, making operation very inconvenient. Furthermore, the high temperature inside the aging chamber poses a safety hazard.

[0004] Therefore, the conventional pipe longitudinal shrinkage rate detection device has technical problems of low detection accuracy and inconvenient operation. Utility Model Content

[0005] The utility model provides a device for detecting the longitudinal shrinkage rate of a plastic pipe, which solves the technical problems of low detection accuracy and inconvenient operation of the device for detecting the longitudinal shrinkage rate of a pipe in the prior art.

[0006] Some implementation plans adopted to solve the above technical problems include:

[0007] A device for detecting longitudinal shrinkage of a plastic pipe comprises a box body, a heating chamber is provided in the box body, and a placement rack is provided for placing the pipe to be tested;

[0008] The box body is provided with an opening communicating with the heating chamber, the placement rack is provided with a cover plate covering the opening, and the placement rack is plugged into the heating chamber;

[0009] The heating chamber is further provided with a counterweight block for applying pressure to the pipe to be tested, and the counterweight block is slidably connected to the top wall of the heating chamber in a vertical direction;

[0010] The placement rack includes a bottom plate for placing the pipe to be tested, and the placement rack also includes a frame body, the frame body is slidably connected to the bottom plate, and the cover plate is arranged on the frame body;

[0011] The frame body is provided with a track for pushing the counterweight block to move upward, the frame body is also provided with a strip groove arranged along the displacement direction of the placement frame, and the bottom plate is provided with a connecting column that cooperates with the strip groove;

[0012] When the placement rack is pushed into the heating chamber, the connecting column moves to the first end of the strip-shaped groove, and the rack body drives the bottom plate to move. Moreover, after the placement rack is plugged into place, the counterweight block is disengaged from the track so that the counterweight block applies pressure to the pipe to be tested.

[0013] When the placement rack moves out of the heating chamber, the track pushes the counterweight block to leave the pipe to be tested, and the connecting column moves from the first end of the strip groove to the second end. After the connecting column moves to the second end of the strip groove, the rack drives the bottom plate to leave the heating chamber, and the first end and the second end are arranged opposite to each other.

[0014] Preferably, the top wall of the heating chamber is provided with a guide column, and the counterweight block is provided with a guide hole cooperating with the guide column. The guide holes are evenly distributed at the edge of the counterweight block, and each guide hole cooperates with an independent guide column.

[0015] Preferably, the counterweight block is provided with a contact block in contact with the track, the cross-section of the contact block is circular, and the contact block and the counterweight block are an integrated structure.

[0016] Preferably, the tracks are provided on both sides of the counterweight block, and the contact blocks are provided on both sides of the counterweight block.

[0017] Preferably, the frame is provided with the strip grooves on both sides of the bottom plate, and connecting columns cooperating with the strip grooves are provided on both sides of the bottom plate, and the connecting columns and the bottom plate are an integrated structure.

[0018] Preferably, the frame is provided with the strip grooves on both sides of the bottom plate, and connecting columns cooperating with the strip grooves are provided on both sides of the bottom plate, and the connecting columns and the bottom plate are an integrated structure.

[0019] Preferably, the identification body is a mark line provided on the bottom plate, or the identification body is a identification layer provided on the bottom plate.

[0020] Preferably, the bottom wall of the box body is provided with a guide groove, and the frame body is provided with a guide rail cooperating with the guide groove.

[0021] Preferably, the guide rail and the frame are an integrated structure, each guide rail cooperates with an independent guide groove, and the cross-section of the guide rail is polygonal.

[0022] Preferably, the cover plate is provided with a handle for facilitating operation of the placement rack, and the handle and the cover plate are an integrated structure, or the handle is fixed to the cover plate by screws.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] By setting a counterweight block, the counterweight block is used to apply a certain pressure to the pipe to be tested, so that the pipe can more realistically simulate the actual working environment during the testing process, thereby improving the testing accuracy.

[0025] By plugging the placement rack into the heating chamber, the entire placement rack can be easily pulled out after the pipe to be tested is heated in the heating chamber, so that the heated pipe leaves the heating chamber, and the heated pipe can be easily taken out, reducing safety hazards and making it less likely for operators to be scalded during operation.

[0026] By configuring the base plate and frame, and by arranging the rails and slots, the frame and base plate move asynchronously. During the insertion of the placement rack, the rails first move the counterweight upward, and then the base plate moves the pipe to be tested directly below the counterweight. After the pipe is heated, the rails first disengage the counterweight from the pipe, and then the base plate removes the pipe from the heating chamber. The asynchronous movement of the base plate and rails prevents interference between the counterweight and the pipe, further improving detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] For the purpose of explanation, several embodiments of the present invention are described in the following drawings. The following drawings are incorporated into this document and constitute a part of the detailed description. In some cases, well-known structures and components are shown in block diagram form to avoid obscuring the concepts of the present invention.

[0028] Figure 1 It is a schematic diagram of the present utility model.

[0029] Figure 2 for Figure 1 The schematic diagram of the first angle behind the box is omitted.

[0030] Figure 3 for Figure 1 The schematic diagram of the second angle behind the box is omitted.

[0031] Figure 4 This is a schematic diagram of the placement rack after it is pulled out from the heating chamber.

[0032] Figure 5 A schematic diagram of the placement rack.

[0033] Figure 6 Schematic diagram of the counterweight.

[0034] As shown in the figure:

[0035] 1. Box body, 11. Heating chamber, 12. Counterweight, 121. Contact block, 13. Guide column.

[0036] 2. Placement rack, 21. Cover plate, 22. Bottom plate, 221. Connecting column, 222. Identification body, 23. Frame body, 231. Track, 232. Strip groove, 24. Guide rail, 25. Handle. DETAILED DESCRIPTION

[0037] The specific embodiments shown below are intended to serve as descriptions of various configurations of the subject technology of the present invention and are not intended to represent the only configuration in which the subject technology of the present invention can be practiced. The specific embodiments include specific details intended to provide a thorough understanding of the subject technology of the present invention. However, it will be clear and apparent to those skilled in the art that the subject technology of the present invention is not limited to the specific details shown herein and can be practiced without these specific details.

[0038] It will be understood that, herein, relational terms such as “first” and “second” are intended to distinguish one entity or operation from another entity or operation, and are not intended to express or imply any actual relationship or order between these entities or operations.

[0039] The terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0040] Reference Figures 1 to 6 As shown, a device for detecting longitudinal shrinkage of a plastic pipe comprises a box body 1, a heating chamber 11 is provided in the box body 1, and a placement rack 2 for placing the pipe to be tested;

[0041] The box body 1 is provided with an opening communicating with the heating chamber 11, and the placement rack 2 is provided with a cover plate 21 covering the opening, and the placement rack 2 is plugged into the heating chamber 11;

[0042] The heating chamber 11 is further provided with a counterweight 12 for applying pressure to the pipe to be tested, and the counterweight 12 is slidably connected to the top wall of the heating chamber 11 in the vertical direction;

[0043] The placement rack 2 includes a bottom plate 22 for placing the pipe to be tested, and the placement rack 2 also includes a frame body 23, the frame body 23 is slidably connected to the bottom plate 22, and the cover plate 21 is set on the frame body 23;

[0044] The frame 23 is provided with a track 231 for pushing the counterweight 12 upward. The frame 23 is also provided with a strip groove 232 arranged along the displacement direction of the placement frame 2. The bottom plate 22 is provided with a connecting column 221 that cooperates with the strip groove 232.

[0045] When the placement rack 2 is pushed into the heating chamber 11, the connecting column 221 moves to the first end of the strip groove 232, and the rack body 23 drives the bottom plate 22 to move. Moreover, after the placement rack 2 is plugged into place, the counterweight 12 is disengaged from the track 231, so that the counterweight 12 applies pressure to the pipe to be tested.

[0046] When the placement rack 2 moves out of the heating chamber 11, the track 231 pushes the counterweight block 12 to leave the pipe to be tested, and the connecting column 221 moves from the first end of the strip groove 232 to the second end. After the connecting column 221 moves to the second end of the strip groove 232, the rack body 23 drives the bottom plate 22 to leave the heating chamber 11, and the first end and the second end are arranged opposite to each other.

[0047] Specifically, the strip groove 232 cooperates with the connecting column 221 to enable the frame 23 and the bottom plate 22 to move asynchronously, thereby preventing the pipes on the bottom plate 22 from interfering with the counterweight 12 .

[0048] The first end refers to an end of the strip-shaped groove 232 close to the cover plate 21 , and the second end refers to an end opposite to the first end.

[0049] Since there is a certain distance between the first end and the second end, the frame 23 and the bottom plate 22 realize asynchronous movement during the process of the connecting post 221 moving from the first end to the second end.

[0050] In the non-working state, the placement rack 2 is inserted into the heating chamber 11. At this time, the connecting column 221 is located at the first end of the strip groove 232, the counterweight 12 is separated from the track 231, and the counterweight 12 is at the lowest position.

[0051] In the process of pulling out the placement rack 2, the rack body 23 is pulled first, and the rack body 23 moves outward alone relative to the heating chamber 11. During this process, the track 231 pushes the counterweight block 12 to move upward until the connecting column 221 moves from the first end of the strip groove 232 to the second end. When the connecting column 221 moves to the second end of the strip groove 232, the connecting column 221 interferes with the strip groove 232, and the rack body 23 is continued to be pulled. The connecting column 221 drives the bottom plate 22 to move outward. During this process, the counterweight block 12 is maintained at a higher position by the track 231.

[0052] Place the pipe to be tested on the bottom plate 22 and push the frame 23 toward the heating chamber 11. The frame 23 moves independently into the heating chamber 11 until the connecting post 221 moves from the second end to the first end. At this point, the counterweight 12 is held at a higher position. Then, continue pushing the frame 23, causing the connecting post 221 to interfere with the strip groove 232, driving the bottom plate 22 and the pipe inside the bottom plate 22 into the heating chamber 11.

[0053] After the placement rack 2 is inserted into the heating chamber 11, the counterweight 12 is out of contact with the track 231, and the counterweight 12 exerts a certain pressure on the pipe under the action of its own gravity.

[0054] The longitudinal retraction rate of the pipe is usually not large, and the moving distance of the counterweight 12 is usually small. When the pipe enters the heating chamber 11, since the pipe is not heated, even if there is a certain friction between the pipe and the counterweight 12, it does not affect the detection accuracy of the pipe.

[0055] The pipe becomes soft after being heated, that is, when the pipe is taken out, the weight block and the pipe should not produce friction. Therefore, the track 231 should be separated from the pipe before the pipe is moved.

[0056] The placement rack 2 defined in the above solution can meet the above action requirements, and has a simple structure and is easy to maintain.

[0057] Reference Figures 1 to 6 As shown, in some embodiments, the top wall of the heating chamber 11 is provided with a guide column 13, and the counterweight block 12 is provided with a guide hole that cooperates with the guide column 13. The guide holes are evenly distributed at the edge of the counterweight block 12, and each of the guide holes cooperates with an independent guide column 13.

[0058] A limit block may be provided at the lower end of the guide post 13 to prevent the counterweight 12 from separating from the guide post 13 .

[0059] In some embodiments, the counterweight 12 is provided with a contact block 121 that contacts the track 231 . The cross-section of the contact block 121 is circular, and the contact block 121 and the counterweight 12 are an integrated structure.

[0060] The rails 231 are provided on both sides of the counterweight block 12 , and the contact blocks 121 are provided on both sides of the counterweight block 12 .

[0061] In some embodiments, the frame 23 is provided with the strip groove 232 on both sides of the base plate 22, and the base plate 22 is provided with connecting columns 221 that cooperate with the strip groove 232 on both sides. The connecting columns 221 and the base plate 22 are an integrated structure.

[0062] The frame 23 is provided with the strip grooves 232 on both sides of the bottom plate 22 . The bottom plate 22 is provided with connecting columns 221 that match the strip grooves 232 on both sides. The connecting columns 221 and the bottom plate 22 are an integrated structure.

[0063] Reference Figures 1 to 6 As shown, in some embodiments, the identification body 222 is a mark provided on the bottom plate 22, or the identification body 222 is a identification layer provided on the bottom plate 22. The identification layer can be coated on the bottom plate 22.

[0064] In some embodiments, the bottom wall of the box body 1 is provided with a guide groove, and the frame body 23 is provided with a guide rail 24 that cooperates with the guide groove.

[0065] The guide rails 24 and the frame 23 are an integrated structure. Each guide rail 24 cooperates with an independent guide groove. The cross-section of the guide rails 24 is polygonal.

[0066] In some embodiments, the cover plate 21 is provided with a handle 25 for facilitating operation of the placement rack 2 , and the handle 25 and the cover plate 21 are an integrated structure, or the handle 25 is fixed to the cover plate 21 by screws.

[0067] The handle 25 can be made of wood to prevent the handle 25 from being scalded, thereby improving the safety of the device for detecting the longitudinal shrinkage rate of a plastic pipe.

[0068] The above describes the technical solution and corresponding details of the subject matter of the present invention. It can be understood that the above description is only some implementation plans of the technical solution of the subject matter of the present invention, and some details may be omitted during its specific implementation.

[0069] In addition, in some embodiments of the above utility model, multiple embodiments may be implemented in combination. Due to space limitations, various combination schemes are not listed one by one. Those skilled in the art can freely combine and implement the above embodiments as needed in specific implementation to obtain a better application experience.

[0070] When implementing the technical solution of the present invention, those skilled in the art may obtain other detailed configurations or drawings based on the technical solution of the present invention and the drawings. Obviously, these details still fall within the scope covered by the technical solution of the present invention without departing from the technical solution of the present invention.

Claims

1. A device for detecting the longitudinal shrinkage rate of a plastic pipe, characterized by: The invention comprises a box body (1), wherein a heating chamber (11) is provided in the box body (1), and the box body (1) is also provided with a placement rack (2) for placing the pipe to be tested; The box body (1) is provided with an opening communicating with the heating chamber (11), the placement rack (2) is provided with a cover plate (21) covering the opening, and the placement rack (2) is plugged into the heating chamber (11); The heating chamber (11) is further provided with a counterweight (12) for applying pressure to the pipe to be inspected, and the counterweight (12) is slidably connected to the top wall of the heating chamber (11) in a vertical direction; The placement rack (2) includes a bottom plate (22) for placing the pipe to be tested, and the placement rack (2) also includes a frame body (23), the frame body (23) is slidably connected to the bottom plate (22), and the cover plate (21) is arranged on the frame body (23); The frame (23) is provided with a track (231) for pushing the counterweight (12) to move upward, and the frame (23) is also provided with a strip groove (232) arranged along the displacement direction of the placement frame (2), and the bottom plate (22) is provided with a connecting column (221) matched with the strip groove (232); When the placement rack (2) is pushed into the heating chamber (11), the connecting column (221) moves to the first end of the strip groove (232), and then the rack body (23) drives the bottom plate (22) to move. Moreover, after the placement rack (2) is plugged into place, the counterweight (12) is disengaged from the track (231), so that the counterweight (12) applies pressure to the pipe to be tested. When the placement rack (2) moves out of the heating chamber (11), the track (231) pushes the counterweight (12) to leave the pipe to be tested, and the connecting column (221) moves from the first end of the strip groove (232) to the second end. After the connecting column (221) moves to the second end of the strip groove (232), the rack body (23) drives the bottom plate (22) to leave the heating chamber (11), and the first end and the second end are arranged opposite to each other.

2. The device for detecting longitudinal shrinkage of a plastic pipe according to claim 1, characterized in that: The top wall of the heating chamber (11) is provided with a guide column (13), and the counterweight block (12) is provided with a guide hole that cooperates with the guide column (13). The guide holes are evenly distributed at the edge of the counterweight block (12), and each guide hole cooperates with an independent guide column (13).

3. The device for detecting longitudinal shrinkage of a plastic pipe according to claim 2, characterized in that: The counterweight (12) is provided with a contact block (121) in contact with the track (231); the cross-section of the contact block (121) is circular; the contact block (121) and the counterweight (12) are an integrated structure.

4. The device for detecting longitudinal shrinkage of a plastic pipe according to claim 3, characterized in that: The rails (231) are provided on both sides of the counterweight block (12), and the contact blocks (121) are provided on both sides of the counterweight block (12).

5. The device for detecting longitudinal shrinkage of a plastic pipe according to claim 1, characterized in that: The frame (23) is provided with the strip grooves (232) on both sides of the bottom plate (22), and the bottom plate (22) is provided with connecting columns (221) that match the strip grooves (232) on both sides, and the connecting columns (221) and the bottom plate (22) are an integrated structure.

6. The device for detecting longitudinal shrinkage of a plastic pipe according to claim 5, characterized in that: The cross-section of the connecting column (221) is polygonal, and the bottom plate (22) is further provided with an identification body (222) for identifying the placement position of the pipe to be inspected.

7. The device for detecting longitudinal shrinkage of a plastic pipe according to claim 6, characterized in that: The identification body (222) is a marking line provided on the bottom plate (22), or the identification body (222) is a identification layer provided on the bottom plate (22).

8. The device for detecting longitudinal shrinkage of a plastic pipe according to claim 1, characterized in that: The bottom wall of the box body (1) is provided with a guide groove, and the frame body (23) is provided with a guide rail (24) that cooperates with the guide groove.

9. The device for detecting longitudinal shrinkage of a plastic pipe according to claim 8, characterized in that: The guide rail (24) and the frame (23) are an integrated structure, each guide rail (24) cooperates with an independent guide groove, and the cross-section of the guide rail (24) is polygonal.

10. The device for detecting longitudinal shrinkage of a plastic pipe according to claim 1, characterized in that: The cover plate (21) is provided with a handle (25) for facilitating operation of the placement rack (2); the handle (25) and the cover plate (21) are an integrated structure, or the handle (25) is fixed to the cover plate (21) by screws.

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