A pressure testing device for plastic pipes

Abstract

This utility model discloses a pressure resistance testing device for plastic pipes, including a test platform with support frames fixed on both sides. At least one set of laterally extendable first cylinders are mounted on the support frames, and pressure blocks are installed at the free ends of the first cylinders. Pressure sensors are embedded in the pressure blocks. This utility model relates to the field of pipe testing technology. This plastic pipe pressure resistance testing device, by setting an internal support member with stepped pipe diameters, can be used to simultaneously test the pressure resistance of multiple different types of pipes, thereby greatly improving testing efficiency. Furthermore, by setting a heating resistor inside the internal support member, the actual working conditions of the pipe can be simulated, allowing the pipe to complete the pressure resistance test under conditions close to actual working conditions, thus obtaining more accurate test values.

Description

Technical Field

[0001] This utility model relates to the field of pipe testing technology, specifically a pressure testing device for plastic pipes. Background Technology

[0002] Before leaving the factory, PE pipes usually need to undergo a pressure test to ensure their quality. Currently, impact testing machines are generally used to compress PE pipes.

[0003] For example, the pressure testing device for PE pipes disclosed in Chinese authorized patent CN 118443487 B and the pressure testing device for graphene composite antistatic pipes disclosed in CN115308029B both belong to the aforementioned equipment.

[0004] The inventors believe that the problems with the above-mentioned equipment are as follows: First, the operating environment of pipes is usually quite harsh, and pipes are often in a high-temperature state, while the above tests are all carried out in a normal temperature environment. The measured limit value is generally larger than the maximum limit value of the pipe under actual working conditions. Second, the above-mentioned device can only test one type of pipe at a time, which is inefficient. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a plastic pipe compression testing device, which solves the problems of inaccurate test results and low efficiency of existing pipe compression testing devices.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a plastic pipe pressure resistance testing device, including a test platform, on both the left and right sides of the test platform are fixedly provided with support frames, and at least one set of first cylinders that can be extended laterally are installed on the support frames. A pressure block is installed on the free end of the first cylinder, and a pressure sensor is embedded in the pressure block.

[0009] The test bench has a through slot in the middle, and a second cylinder that can be raised and lowered is installed below the through slot. The free end of the second cylinder is equipped with a pipe internal support.

[0010] Heating resistors and miniature laser scanners are installed inside the pipe support. A wire groove is opened at the axis of the pipe support to allow wires to pass through. Multiple notches are opened on the outside of the pipe support, and the scanning head of the miniature laser scanner is embedded in the middle of the notch.

[0011] As a further preferred embodiment, the inner support of the pipe includes a plurality of first support heads, second support heads, third support heads and fourth support heads with different radii.

[0012] As a further preferred embodiment, the heights of the first support head, the second support head, the third support head, and the fourth support head are equal, and the distance between two adjacent sets of first cylinders is equal to the height of the first support head.

[0013] As a further preferred embodiment, the first support head, the second support head, the third support head, and the fourth support head are all separated by heat insulation pads.

[0014] (III) Beneficial Effects

[0015] This invention provides a device for testing the compressive strength of plastic pipes. It has the following advantages:

[0016] This plastic pipe pressure testing device, by setting up an internal support with stepped pipe diameter, can be used to simultaneously test the pressure of multiple pipes of different models in a single test, thereby greatly improving the testing efficiency. Furthermore, by setting a heating resistor inside the internal support, the actual working conditions of the pipe can be simulated, allowing the pipe to complete the pressure test under conditions close to actual working conditions, thus obtaining more accurate test values. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a top sectional view of a partial structure of the present invention.

[0019] In the diagram: 1. Test bench; 2. Support frame; 3. First cylinder; 4. Pressure block; 5. Pressure sensor; 6. Through groove; 7. Second cylinder; 8. Inner support of the pipe; 81. First support head; 82. Second support head; 83. Third support head; 84. Fourth support head; 9. Heating resistor; 10. Miniature laser scanner; 11. Wire groove; 12. Notch; 13. Heat insulation pad. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1-2 As shown, this utility model provides a technical solution: a plastic pipe pressure resistance testing device, including a test platform 1, with support frames 2 fixed on both the left and right sides of the test platform 1, and at least one set of first cylinders 3 that can be horizontally extended and retracted installed on the support frames 2, with a pressure block 4 installed on the free end of the first cylinder 3, and a pressure sensor 5 embedded in the pressure block 4.

[0022] Generally, the number of sets of first cylinder 3 is the same as the number of support heads, that is, four sets of support heads correspond to four sets of first cylinders to achieve one-to-one detection. In addition, in order to reduce errors, multiple points should be detected simultaneously for the same pipe. Therefore, it is generally advisable to take four sets of pressure blocks 4.

[0023] The test bench 1 has a through groove 6 in the middle, and a second cylinder 7 that can be raised and lowered is set below the through groove 6. The free end of the second cylinder 7 is equipped with a pipe support 8. The diameter of the through groove 6 should be greater than the maximum diameter of the pipe support 8. The height of the pipe support 8 can be adjusted by the second cylinder 7 so that it corresponds to the position of the pressure block 4. This device can test a single pipe or test multiple pipes at the same time.

[0024] The pipe internal support 8 includes multiple first support heads 81, second support heads 82, third support heads 83 and fourth support heads 84 with different radii. It should be noted that the number of support heads is not limited to four sets.

[0025] The heights of the first support head 81, the second support head 82, the third support head 83, and the fourth support head 84 are equal, and the distance between two adjacent sets of first cylinders 3 is equal to the height of the first support head 81.

[0026] The first support head 81, the second support head 82, the third support head 83 and the fourth support head 84 are all separated by heat insulation pads 13. The purpose of setting heat insulation pads 13 is to make the internal temperature of each support head independent, so that heat transfer will not occur and the pipes are kept at their actual operating temperature.

[0027] Heating resistors 9 and miniature laser scanners 10 are installed inside the inner support member 8 of the pipe. A wire groove 11 is provided at the axis of the inner support member 8 to allow wires to pass through. The wire groove 11 is used for wiring and is connected to an external power source. Multiple notches 12 are provided on the outer side of the inner support member 8. The scanning head of the miniature laser scanner 10 is embedded in the middle of the notch 12, and the detection part is directly opposite the notch 12.

[0028] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0029] In use, the pipe to be tested (labeled a) is first placed on the support head of the corresponding pipe diameter, such as the second support head 82. After it is placed, heating is started through the heating resistor 9. The heat is quickly transferred to the pipe. The operator detects the temperature of the pipe with a thermometer. When the temperature of the pipe reaches the actual working temperature, the first cylinder 3 is immediately opened to drive the pressure block 4 to approach the pipe until the pipe is compressed.

[0030] The deformation of the pipe is detected by the miniature laser scanner 10. When the pipe is deformed, the pressure value on the pressure sensor 5 is read. This pressure value is the actual compressive strength limit of the pipe.

[0031] In summary, this plastic pipe compression testing device, by setting up an internal support with stepped pipe diameters, can be used to simultaneously test multiple pipes of different models, thereby greatly improving testing efficiency. Furthermore, by setting a heating resistor inside the internal support, the actual working conditions of the pipe can be simulated, allowing the pipe to complete the compression test under conditions close to actual working conditions, thus obtaining more accurate test values.

[0032] It should be noted that all electrical components mentioned in this article are electrically connected to an external main controller and 220V or 380V AC mains power. The main controller can be a conventional, known device such as a computer, and its control principles, internal structure, and control switching methods are all conventional methods of existing technology. These are directly cited here without further elaboration. In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure resistance testing device for plastic pipes, characterized in that: The test bench (1) is provided with support frames (2) on both the left and right sides. At least one set of first cylinders (3) that can be extended laterally are installed on the support frames (2). A pressure block (4) is installed on the free end of the first cylinder (3). A pressure sensor (5) is embedded on the pressure block (4). The test bench (1) has a through groove (6) in the middle, and a second cylinder (7) that can be raised and lowered is provided below the through groove (6). The free end of the second cylinder (7) is equipped with a pipe inner support (8). Heating resistor (9) and miniature laser scanner (10) are installed inside the inner support member (8) of the pipe. A wire groove (11) is provided at the axis of the inner support member (8) for wires to pass through. Multiple notches (12) are provided on the outer side of the inner support member (8). The scanning head of the miniature laser scanner (10) is embedded in the middle of the notch (12).

2. A compression testing device for plastic pipe according to claim 1, wherein: The inner support member (8) of the pipe includes a first support head (81), a second support head (82), a third support head (83) and a fourth support head (84) with different radii.

3. A compression testing apparatus for plastic pipe according to claim 2, wherein: The heights of the first support head (81), the second support head (82), the third support head (83) and the fourth support head (84) are equal, and the distance between two adjacent sets of first cylinders (3) is equal to the height of the first support head (81).

4. A compression testing apparatus for plastic pipe according to claim 3, wherein: The first support head (81), the second support head (82), the third support head (83) and the fourth support head (84) are all separated by heat insulation pads (13).

Images