Multi-purpose in-pipe pressure testing machine for plastic pipe

Abstract

The invention relates to a plastic pipe multipurpose in-pipe pressure testing machine which comprises a protection box, a detection support is rotatably connected in the protection box, a rotation driving assembly is arranged on the outer side of the protection box, a pipe length adjusting assembly is slidably connected to the upper side of the detection support, and the pipe length adjusting assembly comprises a sliding seat, a limiting frame, a handle, a first spring and a plug pin. The sliding seat is fixedly connected with an insertion air cylinder, a sliding table of the insertion air cylinder and the lower portion of the detection support are each provided with an automatic pipe head clamp, and each automatic pipe head clamp comprises a main shaft, a clamping hoop, a second spring and a clamping air cylinder; a second plug is arranged on the detection support and located between the two clamping hoops of the automatic pipe head clamp, and a water injection hole is formed in the second plug. The device has the advantages that the device can adapt to pressure testing of plastic pipes with different lengths, the automatic pipe head clamp and the insertion air cylinder are arranged, the plastic pipes can be synchronously clamped in the axial direction and the radial direction, the clamping effect is good, and the accuracy of a detection result is improved.

Description

Technical Field

[0001] The invention relates to the field of pipe testing equipment, and in particular to a multi-purpose in-pipe pressure testing machine for plastic pipes. Background Art

[0002] Plastic pipes are connecting pipes made of plastic material, which are mainly used for liquid transportation and are widely used in liquid systems. In order to test the reliability of plastic pipes, it is necessary to perform pressure tests on the plastic pipes to test the maximum hydraulic pressure that the pipes can withstand.

[0003] Publication number CN213933406U discloses a device for testing the internal pressure of plastic pipes in construction. It comprises a base plate, with a first support plate and a second support plate fixed parallel to the top of the base plate for supporting the pipe. The first support plate is provided with a fixed end closure structure for sealing one end of the pipe, which is fixed to a first fixed base. The second support plate is provided with a movable end closure structure for sealing the other end of the pipe, which is mounted on a sliding assembly connected to a clamping device for driving the sliding and clamping mechanism. The clamping device is fixed to the base plate. This testing device can be used to test the internal pressure of plastic pipes in construction.

[0004] Although the existing in-pipe pressure testing device can realize automatic clamping of pipe fittings, the clamping effect of the pipe fittings by only tightening is poor, and it cannot adapt to the liquid pressure testing of pipe fittings. In addition, the pipe fittings to be tested have various lengths and the scope of application is small. Therefore, a multi-purpose in-pipe pressure testing machine for plastic pipes is needed. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-purpose in-pipe pressure testing machine for plastic pipes, which can adapt to pressure testing of plastic pipes of different lengths and can clamp the plastic pipes synchronously from the axis and radial direction, with better clamping effect and improved accuracy of test results.

[0006] To achieve the above object, the present invention provides the following technical solution: A multi-purpose plastic pipe internal pressure tester, comprising a protective box, wherein a detection bracket is rotatably connected inside the protective box, a rotary drive assembly is arranged outside the protective box, a pipe length adjustment assembly is slidably connected to the upper side of the detection bracket, the pipe length adjustment assembly includes a sliding seat, a limiting frame, a handle, a first spring and a plug pin, an insertion cylinder is fixedly connected to the sliding seat, pipe head automatic clamps are arranged on the sliding table of the insertion cylinder and the lower part of the detection bracket, the pipe head automatic clamp includes a main shaft, two clamping hoops hinged on the main shaft, a second spring located between the two clamping hoops and a clamping cylinder, a first plug is arranged between the two clamping hoops of the pipe head automatic clamp on the sliding table of the insertion cylinder, a second plug is arranged between the two clamping hoops of the pipe head automatic clamp on the detection bracket, and a water injection hole is arranged on the second plug.

[0007] Further, a guiding groove is arranged on the upper side of the detection bracket, a plurality of limiting holes are opened on both sides of the guiding groove, and the limiting holes are correspondingly arranged with the plug pins.

[0008] Further, the rotary drive assembly includes a rotary motor and a transmission assembly, the rotary motor and the transmission assembly are both fixedly connected to the protective box, the output end of the rotary motor is fixedly connected to the input end of the transmission assembly, and the output end of the transmission assembly is fixedly connected to the detection bracket.

[0009] Further, the sliding seat is slidably connected to the guiding groove, the limiting frame is fixedly connected to the sliding seat, the cross section of the limiting frame is in an I shape, the plug pin is fixedly connected to the handle, the handle is slidably connected to the limiting frame, and the first spring is located between the handle and the limiting frame.

[0010] Further, the main shaft is fixedly connected to the sliding table of the insertion cylinder or the detection bracket, a folded edge is arranged at one end of the clamping hoop far away from the main shaft, a fillet is arranged on the folded edge, a U-shaped pushing block is fixedly connected to the piston rod of the clamping cylinder, an inclined surface is arranged at the end of the U-shaped pushing block, the inclined surfaces at both ends of the U-shaped pushing block are respectively tangent to the fillets on the folded edges of the two clamping hoops, and the second spring is located between the folded edges of the two clamping hoops.

[0011] Further, annular grooves are arranged on both the first plug and the second plug, and silica gel sleeves are sleeved on the annular grooves.

[0012] Further, a water inlet pipe is arranged on the side of the protective box, a drain port is arranged at the bottom of the protective box, a flexible water pipe is arranged between the water inlet pipe and the second plug, and a box cover is hinged on the upper part of the protective box.

[0013] Further, the drain port is located in the middle of the protective box, and guide plates are obliquely arranged on both sides of the drain port.

[0014] The beneficial effects of the present invention are as follows: A pipe length adjustment component is provided, which can adapt to the pressure tests of plastic pipes with different lengths. A pipe head automatic fixture and an insertion cylinder are provided, which can clamp the plastic pipe synchronously from the axial and radial directions, with better clamping effect and improved accuracy of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an axonometric schematic diagram of a multi-purpose internal pressure testing machine for plastic pipes of the present invention.

[0016] Figure 2 It is a schematic diagram of the internal structure of a multi-purpose internal pressure testing machine for plastic pipes of the present invention.

[0017] Figure 3 It is a schematic diagram of the structure at the detection bracket of a multi-purpose internal pressure testing machine for plastic pipes of the present invention.

[0018] Figure 4 It is a schematic diagram of the pipe length adjustment component structure of a multi-purpose internal pressure testing machine for plastic pipes of the present invention.

[0019] Figure 5 It is a schematic diagram of the pipe head automatic fixture of a multi-purpose internal pressure testing machine for plastic pipes of the present invention.

[0020] In the figure: 1. Protective box; 101. Water inlet pipe; 102. Drainage port; 103. Box cover; 2. Detection bracket; 201. Guide groove; 202. Limit hole; 301. Rotating motor; 302. Transmission component; 4. Pipe length adjustment component; 401. Slide seat; 402. Limit frame; 403. Handle; 404. First spring; 405. Plug; 5. Insertion cylinder; 6. Pipe head automatic fixture; 601. Main shaft; 602. Clamp; 603. Second spring; 604. Clamping cylinder; 605. C-shaped push block; 7. First plug; 8. Second plug; 801. Water injection hole; 9. Silicone sleeve; 10. Deflector. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] Embodiment:

[0023] Refer to Figure 1-Figure 5A plastic pipe multi-purpose in-pipe pressure testing machine shown in the figure includes a protective box 1. Inside the protective box 1, a detection bracket 2 is rotatably connected. On the outside of the protective box 1, a rotation drive component is provided. On the upper side of the detection bracket 2, a pipe length adjustment component 4 is slidably connected. The pipe length adjustment component 4 includes a slide seat 401, a limit frame 402, a handle 403, a first spring 404, and a plug 405. A plug-in cylinder 5 is fixedly connected to the slide seat 401. Pipe head automatic clamps 6 are provided on the slide table of the plug-in cylinder 5 and the lower part of the detection bracket 2. The pipe head automatic clamp 6 includes a main shaft 601, two clamping hoops 602 hinged on the main shaft 601, a second spring 603 located between the two clamping hoops 602, and a clamping cylinder 604. A first plug 7 is provided between the two clamping hoops 602 of the pipe head automatic clamp 6 on the slide table of the plug-in cylinder 5. A second plug 8 is provided between the two clamping hoops 602 of the pipe head automatic clamp 6 on the detection bracket 2. A water injection hole 801 is provided on the second plug 8.

[0024] On the upper side of the detection bracket 2, a guide groove 201 is opened. On both sides of the guide groove 201, a plurality of limit holes 202 are opened. When adjusting the position of the slide seat 401, the guide groove 201 can guide the adjustment of the slide seat 401, and the limit holes 202 are used to match the plug 405 to lock the position of the slide seat 401. When performing the adjustment action, by pulling the handle 403, the plug 405 is disengaged from the current limit hole 202. Then, after sliding the slide seat 401, the handle 403 is released. Under the action of the first spring 404, the plug 405 is inserted into the corresponding limit hole 202 to lock the position.

[0025] The rotation drive component includes a rotation motor 301 and a transmission component 302. The rotation motor 301 and the protective box 1 are configured to drive the detection bracket 2 to flip to a horizontal state and a vertical state.

[0026] The main shaft 601 is fixedly connected to the slide table of the plug-in cylinder 5 or the detection bracket 2. The clamping hoop 602 can rotate around the main shaft 601. A silica gel layer can be provided on the inner wall of the clamping hoop 602 to provide buffering when clamping the end of the pipe fitting. A hem is provided at one end of the clamping hoop 602 away from the main shaft 601, and the hem has a rounded corner. A U-shaped push block 605 is fixedly connected to the piston rod of the clamping cylinder 604. By extending the piston rod of the clamping cylinder 604, the U-shaped push block 605 can squeeze the hems of the two clamping hoops 602 to clamp the pipe fitting. The second spring 603 is located between the hems of the two clamping hoops 602, and the second spring 603 can reset the clamping hoop 602 after the piston rod of the clamping cylinder 604 retracts. Annular grooves are provided on both the first plug 7 and the second plug 8, and a silica gel sleeve 9 is sleeved in the annular groove. The silica gel sleeve 9 is used to form a seal with the inner wall of the pipe fitting.

[0027] On the side of the protective box 1, there is a water inlet pipe 101, and at the bottom of the protective box 1, there is a drain port 102. A flexible water pipe is provided between the water inlet pipe 101 and the second plug 8. Water is added and pressurized into the pipe fittings through the water inlet pipe 101. The upper part of the protective box 1 is hinged with a box cover 103. During testing, the box cover 103 is closed to prevent water and debris from splashing out when the plastic pipe bursts. The drain port 102 is located in the middle of the protective box 1, and guide plates 10 are inclined on both sides of the drain port 102. The water involved converges towards the drain port 102 through the guide plates 10 and is discharged.

[0028] The working principle of the present invention is as follows: Before detection, first adjust the position of the sliding seat 401 according to the length of the pipe fitting to be measured. When performing the adjustment operation, pull the handle 403 to make the plug pin 405 disengage from the current limiting hole 202. Then, after sliding the sliding seat 401, release the handle 403. Under the action of the first spring 404, the plug pin 405 is inserted into the corresponding limiting hole 202 to lock the position.

[0029] When performing positioning and clamping, open the box cover 103, insert the lower end of the pipe fitting to be measured onto the second plug 8 (to ensure normal feeding of the pipe fitting, the distance between the first plug 7 and the second plug 8 is greater than the pipe length of the pipe fitting to be measured at this time). Then, a clamping action is performed at the first plug 7. The piston rod of the clamping cylinder 604 extends, and the U-shaped push block 605 pushes two clamping rings 602 to clamp the outer wall of the pipe fitting. After that, water is injected into the pipe fitting through the water injection hole 801 (the pipe fitting is in a vertical state at this time). After the injection is completed, the piston rod of the insertion cylinder 5 extends, and the first plug 7 plugs the upper end of the inserted pipe fitting. Then, the pipe fitting automatic fixture 6 clamps the outer wall of the upper end of the pipe fitting. After the clamping is completed, the rotation motor 301 and the transmission component 302 drive the detection bracket 2 to flip to a horizontal state. At this time, close the box cover 103. An observation window can be set on the protective box 1. Different hydraulic pressures are applied to the pipe fitting through the water injection hole and an external hydraulic system, observe whether the pipe fitting bursts during the pressure test, and record the hydraulic data when the pipe fitting bursts to complete the detection.

[0030] In the present invention, unless otherwise clearly specified and limited, terms such as "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] The above embodiments are used to further illustrate the present invention, but the present invention is not limited to these specific embodiments. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be understood to be within the scope of protection of the present invention.

Claims

1. A multi-purpose internal pressure testing machine for plastic pipes, characterized by: It includes a protective box (1), inside which a detection bracket (2) is rotatably connected. A rotation drive assembly is arranged outside the protective box (1). A pipe length adjustment assembly (4) is slidably connected to the upper side of the detection bracket (2). The pipe length adjustment assembly (4) includes a sliding seat (401), a limiting frame (402), a handle (403), a first spring (404) and a plug pin (405). An insertion cylinder (5) is fixedly connected to the sliding seat (401). Pipe head automatic clamps (6) are arranged on the sliding table of the insertion cylinder (5) and the lower part of the detection bracket (2). The pipe head automatic clamp (6) includes a main shaft (601), two clamping hoops (602) hinged to the main shaft (601), a second spring (603) located between the two clamping hoops (602) and a clamping cylinder (604). A first plug (7) is arranged on the sliding table of the insertion cylinder (5) between the two clamping hoops (602) of the pipe head automatic clamp (6). A second plug (8) is arranged on the detection bracket (2) between the two clamping hoops (602) of the pipe head automatic clamp (6). A water injection hole (801) is arranged on the second plug (8).

2. The multi-purpose internal pressure testing machine for plastic pipes according to claim 1, characterized in that: A guiding groove (201) is arranged on the upper side of the detection bracket (2). A plurality of limiting holes (202) are opened on both sides of the guiding groove (201), and the limiting holes (http: / / 202) are arranged corresponding to the plug pin (405).

3. The multi-purpose internal pressure testing machine for plastic pipes according to claim 1, characterized in that: The rotation drive assembly includes a rotation motor (301) and a transmission assembly (302). The rotation motor (301) and the transmission assembly (302) are both fixedly connected to the protective box (1). The output end of the rotation motor (301) is fixedly connected to the input end of the transmission assembly (302). The output end of the transmission assembly (302) is fixedly connected to the detection bracket (2).

4. The multi-purpose internal pressure testing machine for plastic pipes according to claim 2, characterized in that: The sliding seat (401) is slidably connected to the guiding groove (201). The limiting frame (402) is fixedly connected to the sliding seat (401). The cross section of the limiting frame (402) is in an I shape. The plug pin (405) is fixedly connected to the handle (403). The handle (403) is slidably connected to the limiting frame (402). The first spring (404) is located between the handle (403) and the limiting frame (402).

5. The multi-purpose internal pressure testing machine for plastic pipes according to claim 1, characterized in that: The main shaft (601) is fixedly connected to the sliding table of the insertion cylinder (5) or the detection bracket (2). A flanging is arranged at one end of the clamping hoop (602) far away from the main shaft (601), and a fillet is arranged on the flanging. A U-shaped push block (605) is fixedly connected to the piston rod of the clamping cylinder (604). An inclined surface is arranged at the end of the U-shaped push block (605). The inclined surfaces at both ends of the U-shaped push block (605) are respectively tangent to the fillets on the flangings of the two clamping hoops (602). The second spring (603) is located between the flangings of the two clamping hoops (602).

6. The multi-purpose internal pressure testing machine for plastic pipes according to claim 1, characterized in that: An annular groove is arranged on both the first plug (7) and the second plug (8), and a silica gel sleeve (9) is sleeved on the annular groove.

7. The multi-purpose internal pressure testing machine for plastic pipes according to claim 1, characterized in that: A water inlet pipe (101) is provided on the side of the protection box (1), a drain outlet (102) is provided at the bottom of the protection box (1), a flexible water pipe is provided between the water inlet pipe (101) and the second plug (8), and a box cover (103) is hinged on the upper part of the protection box (1).

8. The multi-purpose internal pressure testing machine for plastic pipes according to claim 7, characterized in that: The drainage outlet (102) is located in the middle of the protection box (1), and guide plates (10) are obliquely provided on both sides of the drainage outlet (102).

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