Fastening structure for compression resistance detection of novel material PVC (polyvinyl chloride) pipe

Abstract

The utility model relates to the technical field of PVC (polyvinyl chloride) pipe processing and detection, and discloses a fastening structure for compression resistance detection of a new material PVC pipe, which comprises a bottom plate, a moving trolley mounted at the upper end of the bottom plate, a plurality of moving wheels mounted at the lower end of the moving trolley, rotating wheels rotatably connected to the upper end of the moving trolley, and limiting frames fixedly connected to two ends of the bottom plate. A clamping plate is slidably connected into the bottom plate, a plurality of anti-slip strips are fixedly connected to the upper end of the bottom plate, a pipe is mounted at the upper ends of the anti-slip strips, the two sides of the pipe abut against the moving trolley, and the two ends of the pipe are attached to the clamping plate. The pipe is gradually deformed along with the pressure, the two sides of the pipe can extend along with the deformation until the pipe is gradually flattened, at the moment, the two sides which are extruded to be flattened can push the moving trolley, the supporting force of the moving trolley on the pipe during extrusion is reduced, and the stress expression condition of the pipe in the extrusion process can be more accurately expressed on the deformation degree of the pipe.

Description

Technical Field

[0001] This utility model relates to the field of PVC pipe processing and testing technology, specifically to a fastening structure for testing the compressive strength of new PVC pipe materials. Background Technology

[0002] Silent, high-temperature resistant PVC pipe is a type of PVC pipe with low cost and large drainage capacity. The water flow in the drainage riser is obviously wall-attached, which reduces the water flow velocity, reduces the water resistance coefficient, allows for vertical flow, stabilizes pressure fluctuations within the pipe, and improves the drainage capacity of the riser. Due to the unobstructed air column inside the pipe, pressure fluctuations within the pipe are reduced, improving the safety factor of the pipeline. The six triangular spiral main ribs on the inner wall of the pipe have a significant reinforcing effect. By adopting the hollow-wall spiral silencer riser, the H-type double riser ventilation method can be eliminated, reducing project costs and making it economical, environmentally friendly, and affordable.

[0003] In the process of realizing this utility model, the inventors discovered that:

[0004] Patent document CN217931128U discloses a PVC pipe compressive strength testing device, including a testing platform. PVC pipe clamping mechanisms are symmetrically installed on both sides of the upper end of the testing platform. A testing load guide post is fixedly installed on one side of the middle of the upper end of the testing platform. A load slider is slidably connected to the testing load guide post. A connecting post is fixedly connected to the front of the load slider. A load block fixing frame is fixedly connected to the front end of the connecting post. A testing load block is fixedly connected inside the load block fixing frame. A stress-bearing surface marking steel ball is installed in the middle of the lower end of the testing load block. A support platform is fixedly connected to the middle of the upper end of the testing platform directly below the testing load block. The advantages of this invention are: by setting PVC pipe clamping mechanisms and load block fixing devices at both ends of the testing, it is ensured that the testing load block is in the center of the PVC pipe sample during testing, ensuring uniform stress on the test sample. The stress-bearing surface marking ensures that the rate of change of the outer diameter of the sleeve is on the same stress surface in two measurements, effectively reducing testing errors and improving testing accuracy.

[0005] However, existing devices for testing the compressive strength of PVC pipes require placing the pipes on a platform, lying flat in the center, and then using hydraulic devices to lower a compression plate from above to compress the pipes. This process measures the pipes' compressive strength. While the pipes deform under compression, gradually flattening themselves, the existing devices fix them from the outside. This obstructs and supports the pipes during deformation, increasing the pressure required for compression and causing inaccuracies in the test data. Summary of the Invention

[0006] To address the problem that existing devices fix PVC pipes from the outside, which obstructs and supports the pipes during compression deformation, increasing the pressure required for compression and causing deviations in the pipe's compressive strength test data, this application provides a new fastening structure for PVC pipe compressive strength testing.

[0007] Therefore, the technical solution of this utility model is as follows: a fastening structure for pressure testing of new PVC pipe material, including a base plate, a mobile cart installed on both sides of the base plate, a number of mobile wheels installed at the lower end of the mobile cart, a rotating wheel rotatably connected to the upper end of the mobile cart, a limit frame fixedly connected to both ends of the base plate, a connecting strip slidably connected inside the limit frame, the end of the connecting strip being fixedly connected to the mobile cart, a clamping plate slidably connected inside the base plate, a number of anti-slip strips fixedly connected to the upper end of the base plate, a pipe installed on the upper end of the anti-slip strips, both sides of the pipe abutting against the mobile cart, both ends of the pipe fitting against the clamping plate, and a limit structure provided on the base plate.

[0008] Furthermore, the limiting structure includes a limiting frame, a limiting pad is fixedly connected to the upper end of the limiting frame, an abutment post is slidably connected inside the limiting frame, and a semi-circular abutment plate is fixedly connected to the end of the abutment post.

[0009] Furthermore, an abutment spring is sleeved on the outside of the abutment post, and the two ends of the abutment spring are fixedly connected to the semi-circular abutment plate and the limiting frame, respectively.

[0010] Furthermore, the lower end of the connecting strip is provided with several arc-shaped grooves, which are adapted to the shape of the semi-circular contact plate, and a handle is fixed to the end of the connecting strip.

[0011] Furthermore, a bidirectional screw is rotatably connected inside the base plate, and a drive motor is fixedly connected to the outer surface of the base plate. The output end of the drive motor passes through the base plate and is fixedly connected to the bidirectional screw. Both ends of the bidirectional screw are threadedly connected to L-shaped plates, and the L-shaped plates are fixedly connected to the clamping plate.

[0012] Furthermore, a guide post is fixedly connected inside the base plate, and both ends of the guide post are slidably connected to the L-shaped plate.

[0013] Furthermore, a sliding post is slidably connected to the upper end of the clamping plate, an extension plate is fixedly connected to the end of the sliding post, and several limiting strips are fixedly connected to one side of the extension plate.

[0014] Furthermore, an extension spring is sleeved on the outer side of the sliding column, and the two ends of the extension spring are fixedly connected to the clamping plate and the extension plate, respectively.

[0015] Beneficial Effects: This practical trapezoidal fastening structure, during pipe compression testing, causes the pipe to gradually deform under pressure. As the pipe deforms, both sides extend until it flattens. The flattened sides then push the moving carriage, causing it to push the connecting strip past the limiting frame. As the connecting strip moves, the arc-shaped groove at its lower end moves accordingly. When the groove reaches above the semi-circular contact plate, the contact spring resets, pushing the semi-circular contact plate upwards until it abuts against the inside of the arc-shaped groove. This pushes the connecting strip towards the limiting pad, stopping the moving carriage in its current position before external force is applied. The moving carriage design limits the pipe's sides before compression deformation, maintaining stability and preventing the compression position from changing during pressing. It also moves along the edge of the deformed pipe during compression. This design maintains the pipe's positioning effect while reducing the need for support during deformation, allowing for a more natural deformation process and more accurate data from the compression test. When the pipe needs to be fixed, it is clamped between the clamping plates. At this time, the limiting strips on the extension plate limit the pipe's sides, preventing it from shifting during extrusion. Simultaneously, the extension springs on the outside of the sliding column exert an outward pulling force on the extension plate, ensuring the limiting strips remain firmly against the pipe's sides, guaranteeing the stability of the positioning effect. When the pipe deforms, the extension plate moves along the sliding column towards the clamping plate, maintaining the pipe's positioning effect while reducing the need for support during deformation. This allows the pipe to be stably compressed during deformation, resulting in more accurate extrusion data. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention.

[0017] Figure 2 This is a partial sectional view of the present invention.

[0018] Figure 3 This is a diagram of the internal structure of this utility model.

[0019] Figure 4 This is a bottom view of the present invention.

[0020] Figure 5 yes Figure 2 Enlarged view of point A in the middle.

[0021] Figure 6 yes Figure 3 Enlarged view of point B in the middle.

[0022] The following components are shown in the diagram: 1. Base plate; 2. Pipe; 3. Anti-slip strip; 4. Drive motor; 5. Clamping plate; 6. Extension plate; 7. Moving cart; 8. Connecting strip; 9. Pull handle; 10. Limiting frame; 11. Rotating wheel; 12. L-shaped plate; 13. Bidirectional screw; 14. Guide post; 15. Limiting strip; 16. Extension spring; 17. Limiting pad; 18. Abutment post; 19. Abutment spring; 20. Semi-circular abutment plate; 21. Sliding post. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings, but this embodiment should not be construed as a limitation of this utility model.

[0024] This utility model is as follows Figures 1 to 6 As shown:

[0025] A new type of fastening structure for pressure testing of PVC pipe includes a base plate 1, a moving cart 7 mounted on the upper end of the base plate 1, several moving wheels mounted on the lower end of the moving cart 7, a rotating wheel 11 rotatably connected to the upper end of the moving cart 7, a limit frame 10 fixedly connected to both ends of the base plate 1, a connecting strip 8 slidably connected inside the limit frame 10, the end of the connecting strip 8 being fixedly connected to the moving cart 7, a clamping plate 5 slidably connected inside the base plate 1, several anti-slip strips 3 fixedly connected to the upper end of the base plate 1, a pipe 2 mounted on the upper end of the anti-slip strips 3, both sides of the pipe 2 abutting against the moving cart 7, both ends of the pipe 2 being in contact with the clamping plate 5, and a limit structure provided on the base plate 1;

[0026] When using this device to perform a pressure test on pipe 2, pipe 2 is first laid flat on anti-slip strip 3. Then, clamping plates 5 clamp and limit both ends of pipe 2. Next, moving carts 7 are pushed towards pipe 2 from both sides, so that the rotating wheels 11 at the top of the moving carts 7 abut against both sides of pipe 2 to limit it. Then, the moving carts 7 are pressed down from above the base plate 1. During the pressing process, pipe 2 is squeezed and gradually flattens, squeezing the moving carts 7 on both sides to move to both sides along the connecting strip 8. This reduces the support force of the moving carts 7 when squeezing pipe 2 after limiting it, so that pipe 2 receives less support when squeezed. This allows the stress performance of pipe 2 during the squeezing process to be more accurately reflected in its deformation, making the data more accurate when the device performs a pressure test.

[0027] Figure 1 , Figure 2 and Figure 5In the middle, the limiting structure includes a limiting frame 10, with a limiting pad 17 fixedly connected to the upper end of the limiting frame 10. An abutment post 18 is slidably connected inside the limiting frame 10, and a semi-circular abutment plate 20 is fixedly connected to the end of the abutment post 18. An abutment spring 19 is sleeved on the outside of the abutment post 18, and both ends of the abutment spring 19 are fixedly connected to the semi-circular abutment plate 20 and the limiting frame 10, respectively. Several arc-shaped grooves are opened at the lower end of the connecting strip 8, the arc-shaped grooves matching the shape of the semi-circular abutment plate 20. A handle 9 is fixed to the end of the connecting strip 8.

[0028] When this device is used to test the pipe 2 which requires pressure resistance testing, the testing device lowers a pressure plate horizontally on the base plate 1 to press down on the pipe 2. As the pressure plate of the testing device squeezes the pipe 2, the pipe 2 gradually deforms under pressure, causing both sides of the pipe 2 to extend until the pipe 2 gradually flattens. At this time, the flattened sides push the moving carriage 7, causing the moving carriage 7 to push the connecting strip 8 past the limiting frame 10. As the connecting strip 8 moves, the arc-shaped groove at its lower end moves accordingly, causing the connecting strip 8 to squeeze the semi-circular contact plate 20 during the movement, moving it along the contact post 18 into the limiting frame 10, and squeezing the contact spring 19 to contract it until the arc-shaped groove moves. When the semicircular contact plate 20 is above the contact spring 19, the contact spring 19 resets and pushes the semicircular contact plate 20 upward, so that the semicircular contact plate 20 abuts against the inside of the arc groove, pushing the connecting strip 8 towards the limiting pad 17, so that the moving carriage 7 stops moving and is limited to the current position before being subjected to external force. The setting of the moving carriage 7 can limit both sides of the pipe 2 before the pipe 2 is squeezed and deformed, so that it remains stable and the squeezing position is not easily changed during the pressing process. At the same time, it can also move with the edge of the pipe 2 during the squeezing process, which not only maintains the limiting effect on the pipe 2, but also reduces the support for the pipe 2 during deformation, making the deformation process of the pipe 2 more natural and the data obtained from the pressure test more accurate.

[0029] Figure 3 , Figure 4 and Figure 6 In this configuration, a bidirectional screw 13 is rotatably connected inside the base plate 1, and a drive motor 4 is fixedly connected to the outer surface of the base plate 1. The output end of the drive motor 4 passes through the base plate 1 and is fixedly connected to the bidirectional screw 13. Both ends of the bidirectional screw 13 are threadedly connected to L-shaped plates 12, which are fixedly connected to the clamping plate 5. A guide post 14 is fixedly connected inside the base plate 1, and both ends of the guide post 14 are slidably connected to the L-shaped plates 12. A sliding post 21 is slidably connected to the upper end of the clamping plate 5, and an extension plate 6 is fixedly connected to the end of the sliding post 21. Several limiting strips 15 are fixedly connected to one side of the extension plate 6. An extension spring 16 is sleeved on the outside of the sliding post 21, and both ends of the extension spring 16 are fixedly connected to the clamping plate 5 and the extension plate 6, respectively.

[0030] When it is necessary to fix the pipe 2, the drive motor 4 is started to drive the bidirectional screw 13 to rotate, causing the L-shaped plates 12 to move towards each other. This causes the clamping plates 5 to move towards each other. Due to the presence of the guide post 14, the clamping plates 5 remain stable during the movement and will not shift, ensuring the accuracy of fixing the pipe 2. When the clamping plates 5 move to the appropriate position, the pipe 2 is clamped between the clamping plates 5. At this time, the limiting strip 15 on the extension plate 6 will limit the two sides of the pipe 2 to prevent the pipe 2 from shifting during the extrusion process. Because an extension spring 16 is sleeved on the outside of the sliding column 21, the extension spring 16 will generate an outward pulling force on the extension plate 6. This ensures that the limiting strip 15 is always tightly attached to both sides of the tube 2, thus ensuring the stability of the limiting effect. When the tube 2 deforms, the extension plate 6 will move along the sliding column 21 toward the clamping plate 5 as the tube 2 deforms. This not only maintains the limiting effect on the tube 2, but also reduces the support for the tube 2 during deformation, allowing the tube 2 to be stably compressed during deformation, making the compression data more accurate.

[0031] The working principle of this utility model:

[0032] When it is necessary to fix the pipe 2, the drive motor 4 is started to drive the bidirectional screw 13 to rotate, causing the L-shaped plates 12 to move towards each other. This causes the clamping plates 5 to move towards each other. Due to the presence of the guide post 14, the clamping plates 5 remain stable during the movement and will not shift, ensuring the accuracy of fixing the pipe 2. When the clamping plates 5 move to the appropriate position, the pipe 2 is clamped between the clamping plates 5. At this time, the limiting strip 15 on the extension plate 6 will limit the two sides of the pipe 2 to prevent the pipe 2 from shifting during the extrusion process. Because an extension spring 16 is sleeved on the outside of the sliding column 21, the extension spring 16 will generate an outward pulling force on the extension plate 6, which makes the limiting strip 15 always close to both sides of the tube 2, ensuring the stability of the limiting effect; when the tube 2 deforms, the extension plate 6 will move along the sliding column 21 towards the clamping plate 5 as the tube 2 deforms. This not only maintains the limiting effect on the tube 2, but also reduces the support for the tube 2 during deformation, so that the tube 2 can be stably squeezed during the deformation process, making the extrusion data more accurate.

[0033] When this device is used to test the pipe 2 which requires pressure resistance testing, the testing device descends horizontally above the base plate 1, and the lower pressure plate presses down on the pipe 2. As the lower pressure plate of the testing device squeezes the pipe 2, the pipe 2 gradually deforms under pressure, causing both sides of the pipe 2 to extend until the pipe 2 gradually flattens. At this time, the flattened sides push the moving carriage 7, causing the moving carriage 7 to push the connecting strip 8 past the limiting frame 10. As the connecting strip 8 moves, the arc-shaped groove at its lower end moves accordingly, causing the connecting strip 8 to squeeze the semi-circular contact plate 20 during the movement, moving it along the contact post 18 into the limiting frame 10, and squeezing the contact spring 19 to contract it until the arc-shaped groove moves. Above the semicircular contact plate 20, the contact spring 19 resets and pushes the semicircular contact plate 20 upward, so that the semicircular contact plate 20 abuts against the inside of the arc groove, pushing the connecting strip 8 towards the limiting pad 17, so that the moving carriage 7 stops moving and is limited to the current position before being subjected to external force. The setting of the moving carriage 7 can limit both sides of the pipe 2 before the pipe 2 is squeezed and deformed, so that it remains stable and the squeezing position is not easily changed during the pressing process. At the same time, it can also move with the edge of the pipe 2 deformation when the pipe 2 is squeezed, which not only maintains the limiting effect on the pipe 2, but also reduces the support for the pipe 2 during deformation, making the deformation process of the pipe 2 more natural and the data obtained from the pressure test more accurate.

[0034] Any aspects not described in detail in this specification are techniques well-known in the art.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fastening structure for pressure resistance testing of PVC pipes, comprising a base plate (1), characterized in that: The upper end of the base plate (1) is equipped with a mobile vehicle (7), the lower end of the mobile vehicle (7) is equipped with several mobile wheels, the upper end of the mobile vehicle (7) is rotatably connected with a rotating wheel (11), both ends of the base plate (1) are fixedly connected with a limit frame (10), the inside of the limit frame (10) is slidably connected with a connecting strip (8), the end of the connecting strip (8) is fixedly connected with the mobile vehicle (7), the inside of the base plate (1) is slidably connected with a clamping plate (5), the upper end of the base plate (1) is fixedly connected with several anti-slip strips (3), the upper end of the anti-slip strips (3) is equipped with a pipe (2), both sides of the pipe (2) are in contact with the mobile vehicle (7), both ends of the pipe (2) are in contact with the clamping plate (5), and the base plate (1) is provided with a limit structure.

2. The fastening structure for pressure testing of new PVC pipes according to claim 1, characterized in that: The limiting structure includes a limiting frame (10), a limiting pad (17) is fixedly connected to the upper end of the limiting frame (10), an abutment post (18) is slidably connected inside the limiting frame (10), and a semi-circular abutment plate (20) is fixedly connected to the end of the abutment post (18).

3. The fastening structure for pressure testing of new PVC pipes according to claim 2, characterized in that: An abutment spring (19) is fitted on the outside of the abutment post (18), and the two ends of the abutment spring (19) are fixedly connected to the semi-circular abutment plate (20) and the limiting frame (10) respectively.

4. A fastening structure for pressure testing of new PVC pipes according to claim 2 or 3, characterized in that: The lower end of the connecting strip (8) is provided with several arc-shaped grooves, which are adapted to the shape of the semi-circular contact plate (20). A handle (9) is fixed at the end of the connecting strip (8).

5. The fastening structure for pressure testing of new PVC pipes according to claim 4, characterized in that: The base plate (1) is rotatably connected to a bidirectional screw (13), and a drive motor (4) is fixedly connected to the outer surface of the base plate (1). The output end of the drive motor (4) passes through the base plate (1) and is fixedly connected to the bidirectional screw (13). Both ends of the bidirectional screw (13) are threadedly connected to L-shaped plates (12), and the L-shaped plates (12) are fixedly connected to the clamping plate (5).

6. The fastening structure for pressure testing of new PVC pipes according to claim 5, characterized in that: The base plate (1) is fixedly connected to a guide column (14), and both ends of the guide column (14) are slidably connected to the L-shaped plate (12).

7. The fastening structure for pressure testing of new PVC pipes according to claim 6, characterized in that: The upper end of the clamping plate (5) is slidably connected to a sliding column (21), and the end of the sliding column (21) is fixedly connected to an extension plate (6). A number of limiting strips (15) are fixedly connected to one side of the extension plate (6).

8. The fastening structure for pressure testing of new PVC pipes according to claim 7, characterized in that: An extension spring (16) is sleeved on the outside of the sliding column (21), and the two ends of the extension spring (16) are fixedly connected to the clamping plate (5) and the extension plate (6) respectively.

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