Quality detection equipment and process for plastic pipeline production

Abstract

The invention relates to the field of plastic pipeline detection, in particular to quality detection equipment and process for plastic pipeline production. According to the quality detection equipment for plastic pipeline production, an annular pressurizing air chamber is jointly formed by the quality detection equipment and the outer surfaces of welding ports of two plastic single pipes, and meanwhile, a hydraulic push rod on a first moving frame pushes a second moving frame to apply pulling force to the welding ports of the two plastic single pipes; whether the welding ports of the plastic single pipes are broken due to deformation under the action of tensile force due to the fact that the welding ports are not firmly welded or not is judged, the tensile resistance performance detection work of the welding ports of the two plastic single pipes is completed, and meanwhile the detection work of the firm state of the welding ports is completed. The technical problem that whether the welding firmness state of the two plastic pipelines is obviously changed or not when the welding ports of the two plastic pipelines are subjected to large pulling force cannot be detected by means of the prior art is effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of plastic pipe detection, especially to a quality detection equipment and process for plastic pipe production. BACKGROUND

[0002] In the construction site of the plastic pipe, two plastic pipes aligned and spliced together need to be heat-melted and welded. In the welding process, two annular flange structures are formed between the welding ports of the two plastic pipes, which are closely close to each other. The quality of the annular flange structure between the welding ports of the two plastic pipes directly affects the tensile strength and leak-proof sealing performance of the pipe. In the quality detection of the annular flange structure between the welding ports of the plastic pipe, the existing technical means needs to hold a cutter to thin the outer ring of the annular flange structure, and expose the inner area of the annular flange structure. By observing whether there are obvious bubbles or pore structures in the inner area of the annular flange structure, it can be directly judged whether the welding firmness of the welding ports of the two plastic pipes is qualified. However, this method cannot detect whether the welding firmness of the welding ports of the two plastic pipes changes obviously when they are subjected to a larger tensile force, resulting in incomplete detection of the quality of the welding ports and the risk of missing detection. SUMMARY

[0003] In order to overcome the shortcomings of the prior art that cannot detect whether the welding firmness of the welding ports of the two plastic pipes changes obviously when they are subjected to a larger tensile force, the present application provides a quality detection equipment and process for plastic pipe production.

[0004] The technical scheme is as follows: a quality detection equipment for plastic pipe production, comprising a first moving frame, a second moving frame, a hydraulic push rod, a lower fixed half ring, an upper fixed half ring, a pressurized air pump, a gas delivery gun, an air pressure sensor, a lower sealing half ring, an upper sealing half ring, a check valve, a support seat and a pressure cover; the first moving frame is slidably connected to the second moving frame; the first moving frame is provided with the hydraulic push rod for driving the second moving frame to move in the left-right direction; the first moving frame is fixedly connected with the lower fixed half ring; the lower fixed half ring is detachably fixed with the upper fixed half ring; the first moving frame is provided with the pressurized air pump; the gas outlet port of the pressurized air pump is connected with the gas delivery gun; the gas delivery gun is provided with the air pressure sensor; the left and right inner sides of the lower fixed half ring are each connected with one lower sealing half ring; the left and right inner sides of the upper fixed half ring are each connected with one upper sealing half ring; a plurality of check valves are equidistantly arranged on the lower fixed half ring; a plurality of check valves are also equidistantly arranged on the upper fixed half ring; the first moving frame is fixedly connected with one support seat; the second moving frame is also fixedly connected with one support seat; the support seat is detachably fixed with the pressure cover.

[0005] Preferably, a plurality of lower protruding parts are connected to the support seat; a plurality of upper protruding parts are connected to the pressure cover.

[0006] Preferably, a colored powder storage tank is installed on the pressurized air pump; a one-way valve is installed between the discharge port of the colored powder storage tank and the air inlet port of the pressurized air pump.

[0007] Preferably, the gas delivery gun is equipped with a two-way valve.

[0008] Preferably, the lower sealing half-ring is slidably connected to the lower fixed half-ring; the upper sealing half-ring is slidably connected to the upper fixed half-ring; a lower movable frame is slidably connected to the left and right sides of the lower fixed half-ring; the lower movable frame is fixedly connected to the corresponding lower sealing half-ring; an upper movable frame is slidably connected to the left and right sides of the upper fixed half-ring; the upper movable frame is fixedly connected to the corresponding upper sealing half-ring.

[0009] Preferably, the inner wall of the lower fixed half-ring is fixed with partition plates at equal intervals corresponding to the number of check valves on the lower fixed half-ring; the inner wall of the upper fixed half-ring is also fixed with partition plates at equal intervals corresponding to the number of check valves on the upper fixed half-ring; the partition plates slide to connect the corresponding lower sealing half-ring and upper sealing half-ring.

[0010] Preferably, a cutter is inserted into the inner front side of the lower fixing half ring.

[0011] Preferably, the lower protruding component is a rubber roller; the support base has a built-in motor drive system for driving the protruding component to rotate.

[0012] Preferably, at least two lower electric push rods are installed on the left and right sides of the lower fixed half ring; the telescopic ends of the lower electric push rods are respectively fixed to the lower movable frame on the same side; at least two upper electric push rods are installed on the left and right sides of the upper fixed half ring; the telescopic ends of the upper electric push rods are respectively fixed to the upper movable frame on the same side.

[0013] Preferably, a quality inspection process for plastic pipe production includes the following steps: Step 1: Installation and fixing. Remove the upper fixing half ring and pressure cap, align the two plastic single tubes and place them on the support base, then fix them again to complete the preparation. Step 2: Sealing and applying force. The lower fixed half ring, the upper fixed half ring, the lower sealing half ring, and the upper sealing half ring form an annular pressurized air chamber. Then, the hydraulic push rod is activated to apply tension to the welding port. Step 3: Initial airtightness test. Inflate the air chamber with air through the air gun and check valve. Monitor the pressure with the air pressure sensor. If the pressure is stable, it is qualified; if it drops, there is a leak. Step 4: Marking and Repair. Inject colored powder gas from the colored powder storage tank into the single gas chamber where the rupture is located to mark it for subsequent precise repair.

[0014] The present invention has the following advantages: A quality inspection device for plastic pipe production, comprising a lower fixed semi-ring, an upper fixed semi-ring, sealing rings on both sides, and the outer surfaces of the welded ports of two plastic single pipes forming an annular pressurized air chamber. Simultaneously, a hydraulic push rod on the first movable frame pushes a second movable frame to apply tension to the welded ports of the two plastic single pipes, causing tensile deformation. This allows the device to determine whether the welded ports of the plastic single pipes will break due to deformation under tension if they are not firmly welded, thus completing the tensile strength test of the welded ports of the two plastic single pipes and also testing the weld firmness. This solves the technical problem that existing technologies cannot detect whether the weld firmness of two plastic pipes changes significantly when subjected to large tensile forces. Attached Figure Description

[0015] Figure 1 This is a perspective view of a quality inspection device for plastic pipe production according to the present invention; Figure 2 This is a perspective view of the lower and upper fixed semi-rings of a quality inspection device for plastic pipe production according to the present invention. Figure 3 This is a cross-sectional view of the lower and upper fixed semi-ring structures of a quality inspection device for plastic pipe production according to the present invention. Figure 4 This is a perspective view of the lower sealing half-ring and the upper sealing half-ring of a quality inspection device for plastic pipe production according to the present invention; Figure 5 This is a perspective view of the lower fixed semi-ring of a quality inspection device for plastic pipe production according to the present invention; Figure 6 This is a perspective view of the upper fixed semi-ring of a quality inspection device for plastic pipe production according to the present invention; Figure 7 This is an exploded perspective view of the first and second movable frames of a quality inspection device for plastic pipe production according to the present invention. Figure 8 This is a three-dimensional schematic diagram of the placement of two single plastic pipes in a quality inspection device for plastic pipe production according to the present invention. Figure 9 This is a front view schematic diagram of the placement of two single plastic pipes in a quality inspection device for plastic pipe production according to the present invention.

[0016] The meanings of the reference numerals in the figure are as follows: 11-First movable frame, 12-Second movable frame, 13-Hydraulic push rod, 21-Lower fixed half ring, 22-Upper fixed half ring, 23-Pressurized air pump, 231-Colored powder storage tank, 232-One-way valve, 24-Air delivery gun, 25-Air pressure sensor, 26-Two-way valve, 31-Lower sealing half ring, 32-Upper sealing half ring, 33-Check valve, 34-Separator, 35-Cutter, 41-Lower movable frame, 42-Upper movable frame, 43-Lower electric push rod, 44-Upper electric push rod, 51-Support base, 52-Lower protruding part, 53-Pressure cap, 54-Upper protruding part, 6-Plastic single tube, 601-Welding port. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It is hereby declared that the directional terms such as up, down, left, right, front, back, inside, and outside used in this text are based solely on the accompanying drawings and are not intended to specifically limit the invention.

[0018] Example 1: A quality inspection device for plastic pipe production, such as... Figures 1-7As shown, it includes a first movable frame 11, a second movable frame 12, a hydraulic push rod 13, a lower fixed half-ring 21, an upper fixed half-ring 22, a pressurizing air pump 23, an air delivery gun 24, an air pressure sensor 25, a lower sealing half-ring 31, an upper sealing half-ring 32, a check valve 33, a support base 51, a lower protruding component 52, a pressure cap 53, and an upper protruding component 54; the first movable frame 11 is slidably connected to the second movable frame 12; the hydraulic push rod 13 is installed on the first movable frame 11; The telescopic end of the hydraulic push rod 13 is fixedly connected to the second movable frame 12; a lower fixed half-ring 21 is fixedly connected to the first movable frame 11; an upper fixed half-ring 22 is fixed to the lower fixed half-ring 21 by quick-release bolts; a pressurizing air pump 23 is installed on the first movable frame 11; a colored powder storage tank 231 is installed on the pressurizing air pump 23; a one-way valve 232, initially in a closed state, is installed between the discharge port of the colored powder storage tank 231 and the air inlet port of the pressurizing air pump 23; The air outlet of the air pump 23 is connected to an air delivery gun 24; an air pressure sensor 25 is installed on the air delivery gun 24; a two-way valve 26 is installed on the air delivery gun 24 and the two-way valve 26 is in the open state; a lower sealing half-ring 31 is connected to the left and right sides of the lower fixed half-ring 21; an upper sealing half-ring 32 is connected to the left and right sides of the upper fixed half-ring 22, and the upper sealing half-ring 32 initially forms a complete sealing ring together with the lower sealing half-ring 31 on the same side; Several check valves 33 are equidistantly arranged on the lower fixed semi-ring 21; several check valves 33 are also equidistantly arranged on the upper fixed semi-ring 22; a support base 51 is fixedly connected to the first movable frame 11; a support base 51 is also fixedly connected to the second movable frame 12; a pressure cap 53 is detachably fixed to each of the two support bases 51 by bolts; several lower protruding parts 52 are connected to each of the two support bases 51; several upper protruding parts 54 are connected to each of the two pressure caps 53.

[0019] like Figures 2-6As shown, both lower sealing half-rings 31 are slidably connected to the lower fixed half-ring 21; both upper sealing half-rings 32 are slidably connected to the upper fixed half-ring 22; a lower movable frame 41 is slidably connected to the left and right sides of the lower fixed half-ring 21; each of the two lower movable frames 41 is fixedly connected to a corresponding lower sealing half-ring 31; each of the upper fixed half-rings 22 is slidably connected to the left and right sides of the upper movable frame 42; each of the two upper movable frames 42 is fixedly connected to a corresponding upper sealing half-ring 32; and check valves are equidistantly fixed to the inner wall of the lower fixed half-ring 21. The number of air valves 33 corresponds to the number of partition plates 34; the inner wall of the upper fixed half ring 22 is also equidistantly fixed with partition plates 34 corresponding to the number of check valves 33 on the upper fixed half ring 22; each partition plate 34 is slidably connected to the corresponding lower sealing half ring 31 and upper sealing half ring 32; all the lower sealing half rings 31, upper sealing half rings 32 and partition plates 34 are made of elastic rubber material, so that the lower sealing half rings 31, upper sealing half rings 32 and partition plates 34 can fit tightly and adapt to the different sizes of annular flange structures on the welding ports 601 of the two plastic single tubes 6.

[0020] When using the quality inspection equipment for plastic pipe production according to the present invention, the operator first removes the two caps 53 from the corresponding support seats 51 and removes the upper fixing half ring 22 from the lower fixing half ring 21. Then, the two plastic single pipes 6 can be respectively mounted on the two support seats 51, and the welding ports 601 of the two plastic single pipes 6 are aligned with the lower fixing half ring 21. Next, the two caps 53 are respectively installed back onto the corresponding support seats 51. The caps 53 are pressed against the outer surface of the plastic single pipe 6 by the upper protruding part 54. Figure 8 and Figure 9 As shown, the lower protruding part 52 and the upper protruding part 54 together clamp the plastic single tube 6 on the same side. Then, the lower fixing half ring 21 is installed back onto the corresponding support seat 51, and the lower sealing half ring 31 and the upper sealing half ring 32 on the left and right sides are respectively tightly attached to the outer surface of the two plastic single tubes 6. The lower sealing half ring 31 and the upper sealing half ring 32 on the left side together form the left sealing ring, and the lower sealing half ring 31 and the upper sealing half ring 32 on the right side together form the right sealing ring. At this time, the lower fixing half ring 21, the upper fixing half ring 22, the sealing rings on the left and right sides and the outer surface of the welding port 601 of the two plastic single tubes 6 together form an annular pressurized air chamber. There are gaps between the lower sealing half ring 31 and the upper sealing half ring 32 and each partition plate 34, so the annular pressurized air chamber will not be separated by the partition plate 34.

[0021] Then, the hydraulic push rod 13 pushes the second moving frame 12 to move to the right along the first moving frame 11. At the same time, the second moving frame 12 drives the right-side support seat 51 and pressure cap 53 to move to the right. The right-side support seat 51 and pressure cap 53 together drive the plastic single tube 6 they hold to move to the right, thereby applying a rightward pulling force to the welding ports 601 of the two plastic single tubes 6. If the tensile strength of the welding ports 601 of the two plastic single tubes 6 is poor, the welding ports 601 of the two plastic single tubes 6 will undergo severe deformation and break under the action of this pulling force. At the same time, the operator holds the air gun 24 and inserts it into any one of the check valves 33, and turns on the pressurized air pump 23. Through the air gun 24 and the check valve 33, the lower fixed half ring 21 and the upper fixed half ring 22 are connected. Pressurized gas is supplied to the pressurized air chamber. After the operator closes the two-way valve 26, the gas supply gun 24 no longer supplies pressurized gas to the pressurized air chamber. After that, when the air pressure sensor 25 on the gas supply gun 24 detects that the air pressure inside the annular pressurized air chamber remains stable, it indicates that the welded ports 601 of the two plastic single tubes 6 are in a firm welded state. When the air pressure sensor 25 on the gas supply gun 24 detects that the air pressure inside the annular pressurized air chamber suddenly drops, it indicates that the welded ports 601 of the two plastic single tubes 6 have broken due to deformation under tensile force because they were not firmly welded. Thus, the tensile strength test of the welded ports 601 of the two plastic single tubes 6 is completed, as is the test of the weld firmness of the welded ports 601 of the two plastic single tubes 6.

[0022] After detecting a tear in the welded ports 601 of the two plastic tubes 6 due to being pulled, further inspection is needed to determine the location of the tear in the area of ​​the welded ports 601. At this point, the operator pushes the lower movable frames 41 and upper movable frames 42 on both sides towards the center. Simultaneously, the lower movable frames 41 and upper movable frames 42 on both sides push the sealing rings on both sides towards the center, so that the lower sealing half-ring 31 and upper sealing half-ring 32 on the left side are tightly pressed against the left annular flange structure of the welded ports 601 of the two plastic tubes 6, and the lower sealing half-ring 31 and upper sealing half-ring 32 on the right side are tightly pressed against the right annular flange structure of the welded ports 601 of the two plastic tubes 6. This ensures that the lower sealing half-rings 31 and upper sealing half-rings 32 on both sides are in a tightly pressed state. At this point, the gaps between the lower sealing half-rings 31 and upper sealing half-rings 32 and each separator 34 are sealed, allowing only the left and right sides to pass through. The sealing rings on both sides and the outer surfaces of the welded ports 601 of the two plastic single tubes 6 together form a small annular pressurized air chamber. Each separator 34 divides this small annular pressurized air chamber into multiple independent pressurized single air chambers. Each check valve 33 connects to a corresponding pressurized single air chamber. Then, the operator inserts the air supply gun 24 into each check valve 33 in sequence, turns on the pressurized air pump 23, and delivers pressurized gas to each pressurized single air chamber through the air supply gun 24 and each check valve 33. Then, the two-way valve 26 is closed. When the air pressure sensor 25 on the air supply gun 24 detects that the air pressure in a certain pressurized single air chamber remains stable, it indicates that the corresponding position on the welded ports 601 of the two plastic single tubes 6 is firmly welded. When the air pressure sensor 25 on the air supply gun 24 detects that the air pressure in a certain pressurized single air chamber suddenly drops, it indicates that the corresponding position on the welded ports 601 of the two plastic single tubes 6 is not firmly welded and has a broken structure.

[0023] After locating the location where the welded ports 601 of the two plastic single tubes 6 were loosely welded and had broken structures, the operator continued to supply pressurized gas into the pressurized single-gas chamber. Simultaneously, the operator opened the one-way valve 232, allowing some of the colored powder in the colored powder storage tank 231 to be drawn into the pressurized gas pump 23. The colored powder was then transported into the pressurized single-gas chamber along with the pressurized gas. Some of the colored powder entering the pressurized single-gas chamber adhered to the welded ports 601 of the plastic single tubes 6. Furthermore, because the pressurized gas passed through the welded ports 601 of the two plastic single tubes 6... The broken structure on the surface leaks outwards, resulting in a higher concentration of colored powder adhering to the broken structure at the welded ports 601 of the two plastic single tubes 6. Afterwards, the operator shuts off the pressurized air pump 23 and checks the area where colored powder appears on the inner wall of the welded ports 601 of the two plastic single tubes 6. This allows them to locate the position of the broken structure marked by colored powder on the welded ports 601 of the two plastic single tubes 6. Then, they carry out reinforcement and repair work on the position marked by colored powder to enhance the weld strength and tensile strength of the welded ports 601 of the two plastic single tubes 6.

[0024] Example 2, based on Example 1 above, as follows: Figures 1-7As shown, in this embodiment, a cutter 35 is quickly inserted into the inner front side of the lower fixing half-ring 21, with the blade of the cutter 35 facing upwards; all lower protruding parts 52 are rubber rollers; both support seats 51 have built-in motor drive systems for driving the rotation of the protruding parts 52; when the size of the annular flange structure on the welding port 601 of the two plastic single tubes 6 is large, after the operator removes the two pressure caps 53 from the corresponding support seats 51 and removes the upper fixing half-ring 22 from the lower fixing half-ring 21, the two plastic single tubes 6 can be respectively placed on the two support seats 51. During the process of placing the welding port 601 of the two plastic single tubes 6 on the lower fixing half-ring 21, the cutter 35 on the inner front side of the lower fixing half-ring 21 will cut into the front side of the annular flange structure on the welding port 601 of the two plastic single tubes 6 at an upward angle. Then, the motor drive system built into the support seat 51 drives the lower protruding part 52 to rotate. The rubber roller component used in the starting component 52 rotates slowly, causing the two plastic tubes 6 to rotate slowly on the two support seats 51 respectively. This allows the annular flange structure on the welding port 601 of the two plastic tubes 6 to pass through the cutter 35 in sequence. After the two plastic tubes 6 rotate once, the annular flange structure on the welding port 601 of the two plastic tubes 6 can be thinned to the specified thickness by the cutter 35. At the same time, the operator can also observe the outer surface of the annular flange structure on the welding port 601 of the two plastic tubes 6 after thinning to check whether there are obvious bubbles or pores. If no obvious bubbles or pores are found, it means that the welding port 601 of the two plastic tubes 6 is in a firm welding state. In this way, the welding firmness of the welding port 601 of the two plastic tubes 6 can also be checked.

[0025] Example 3, based on Example 1 above, as follows: Figures 1-7 As shown, in this embodiment, two lower electric push rods 43 are installed on the left and right sides of the lower fixed semi-ring 21; the telescopic end of each lower electric push rod 43 is fixed to the lower movable frame 41 on the same side; two upper electric push rods 44 are installed on the left and right sides of the upper fixed semi-ring 22; the telescopic end of each upper electric push rod 44 is fixed to the upper movable frame 42 on the same side; by controlling the lower movable frame 41 and the upper movable frame 42 to move left and right respectively through the lower electric push rods 43 and the upper electric push rods 44, the lower movable frame 41 and the upper movable frame 42 can be moved along the outer surface of the plastic single tube 6, replacing manual pushing of the lower movable frame 41 and the upper movable frame 42, thereby achieving easier adjustment of the position of the lower sealing semi-ring 31 and the upper sealing semi-ring 32 on the plastic single tube 6.

[0026] A quality inspection process for plastic pipe production includes the following steps: Step 1: Installation and fixing. Remove the upper fixing half ring 22 and the pressure cap 53. Align the two plastic single tubes 6 and place them on the support base 51, then fix them again to complete the preparation. Step 2: Sealing and applying force. The lower fixed half ring 21, the upper fixed half ring 22, the lower sealing half ring 31, and the upper sealing half ring 32 form an annular pressurized air chamber. Then, the hydraulic push rod 13 is activated to apply tension to the welding port 601. Step 3: Initial airtightness test. Inflate the air chamber with air through the air gun 24 and check valve 33. The pressure is monitored by the pressure sensor 25. If the pressure is stable, it is qualified; if it drops, there is a leak. Step 4: Marking and Repair. Inject colored powder gas from colored powder storage tank 231 into the single gas chamber where the rupture is located for marking, so as to facilitate accurate repair later.

[0027] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. All equivalent substitutions made within the principles of the present invention should be included within the scope of protection of the present invention. Contents not described in detail in this invention are existing technologies known to those skilled in the art.

Claims

1. A quality inspection device for the production of plastic pipes, comprising a first movable frame (11); Its features are, It also includes a second movable frame (12); the first movable frame (11) is slidably connected to the second movable frame (12); a hydraulic push rod (13) is installed on the first movable frame (11) to drive the second movable frame (12) to move in the left and right direction; a lower fixed half ring (21) is fixedly connected to the first movable frame (11); an upper fixed half ring (22) is detachably fixed to the lower fixed half ring (21); a pressurizing air pump (23) is installed on the first movable frame (11); an air supply gun (24) is connected to the air outlet of the pressurizing air pump (23); a pressure sensor (24) is installed on the air supply gun (24). 5) A lower sealing half-ring (31) is connected to the left and right sides of the lower fixed half-ring (21); an upper sealing half-ring (32) is connected to the left and right sides of the upper fixed half-ring (22); several check valves (33) are equidistantly arranged on the lower fixed half-ring (21); several check valves (33) are also equidistantly arranged on the upper fixed half-ring (22); a support seat (51) is fixedly connected to the first moving frame (11); a support seat (51) is also fixedly connected to the second moving frame (12); a pressure cap (53) is detachably fixed on the support seat (51).

2. The quality inspection equipment for plastic pipe production according to claim 1, characterized in that, The support base (51) is connected to several lower protruding parts (52); the pressure cap (53) is connected to several upper protruding parts (54).

3. The quality inspection equipment for plastic pipe production according to claim 1, characterized in that, A colored powder storage tank (231) is installed on the pressurized air pump (23); a one-way valve (232) is installed between the discharge port of the colored powder storage tank (231) and the air inlet port of the pressurized air pump (23).

4. The quality inspection equipment for plastic pipe production according to claim 1, characterized in that, A two-way valve (26) is installed on the gas delivery gun (24).

5. The quality inspection equipment for plastic pipe production according to claim 1, characterized in that, The lower sealing half ring (31) is slidably connected to the lower fixed half ring (21); the upper sealing half ring (32) is slidably connected to the upper fixed half ring (22); a lower movable frame (41) is slidably connected to the left and right sides of the lower fixed half ring (21); the lower movable frame (41) is fixedly connected to the corresponding lower sealing half ring (31); an upper movable frame (42) is slidably connected to the left and right sides of the upper fixed half ring (22); the upper movable frame (42) is fixedly connected to the corresponding upper sealing half ring (32).

6. The quality inspection equipment for plastic pipe production according to claim 5, characterized in that, The inner wall of the lower fixed half ring (21) is fixed with partition plates (34) at equal intervals, corresponding to the number of check valves (33) on the lower fixed half ring (21); the inner wall of the upper fixed half ring (22) is also fixed with partition plates (34) at equal intervals, corresponding to the number of check valves (33) on the upper fixed half ring (22); each partition plate (34) is slidably connected to the lower sealing half ring (31) or the upper sealing half ring (32) on the same side.

7. The quality inspection equipment for plastic pipe production according to claim 1, characterized in that, A cutter (35) is inserted into the inner front side of the lower fixed half ring (21).

8. The quality inspection equipment for plastic pipe production according to claim 7, characterized in that, The lower protruding part (52) is a rubber roller; the support base (51) has a built-in motor drive system that drives the protruding part (52) to rotate.

9. A quality inspection device for plastic pipe production according to any one of claims 5 or 6, characterized in that, At least two lower electric push rods (43) are installed on the left and right sides of the lower fixed half ring (21); the telescopic ends of the lower electric push rods (43) are respectively fixed to the lower movable frame (41) on the same side; at least two upper electric push rods (44) are installed on the left and right sides of the upper fixed half ring (22); the telescopic ends of the upper electric push rods (44) are respectively fixed to the upper movable frame (42) on the same side.

10. A quality inspection process for plastic pipe production, characterized in that, This process uses a quality inspection device for plastic pipe production as described in claim 9, and includes the following steps: Step 1: Installation and fixing. Remove the upper fixing half ring (22) and the pressure cap (53), align the two plastic single tubes (6) and place them on the support base (51) and fix them again to complete the preparation; Step 2: Sealing and applying force. An annular pressurized air chamber is formed by the lower fixed half ring (21), the upper fixed half ring (22), the lower sealing half ring (31), and the upper sealing half ring (32). Then, the hydraulic push rod (13) is activated to apply tension to the welding port (601). Step 3: Initial airtightness test. Inflate the air chamber with air through the air supply gun (24) and check valve (33). Monitor the pressure with the air pressure sensor (25). If the pressure is stable, it is qualified; if it drops, there is a leak. Step 4: Marking and Repair. Inject colored powder gas from the colored powder storage tank (231) into the single gas chamber where the rupture is located to mark it for subsequent accurate repair.

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