Swing test equipment for PVC water inlet pipe production detection

Abstract

The utility model discloses swing test equipment for PVC water inlet pipe production detection, which comprises a mounting bottom plate, a supporting device, a swing device, a distribution box, a round pipe limiting device and a counterweight mounting device, and is characterized in that the mounting bottom plate is fixedly connected with the supporting device, the mounting bottom plate is fixedly connected with the distribution box, the swing device is fixedly connected with the supporting device, and the round pipe limiting device is fixedly connected with the counterweight mounting device. The round pipe limiting device is fixedly connected with the supporting device, the balance weight mounting device is fixedly connected with the supporting device, the mounting bottom plate is used for mounting the supporting device, the supporting device serves as a main mounting foundation and is used for mounting other devices, a round pipe is limited through the round pipe limiting device, and a balance weight is mounted through the balance weight mounting device. The PVC pipes are subjected to an installation test through the swing device, and the PVC pipes are classified according to swing test results.

Description

Technical Field

[0001] The utility model relates to the technical field of swing testing machines, in particular to a swing test device for PVC water inlet pipe production inspection. Background Technique

[0002] During the use of PVC water inlet pipes, bending is inevitable. Therefore, during the actual production process, PVC water inlet pipes need to have a certain fixed anti-bending ability.

[0003] The swing test device is one of the devices used to test the anti-bending ability of the PVC water inlet pipe to be tested. However, for the existing swing test devices, due to the incomplete functions, the counterweight blocks need to be added manually. Manually adding counterweight blocks will result in different adding positions, which will affect the test results. At the same time, the fixation of the PVC water inlet pipe is only simply limited by a limiting device, and the PVC pipe is not fixed within a certain aperture, which will cause the fixing position of the PVC water inlet pipe to be different each time, affecting the force condition and also the swing test results. Content of the Utility Model

[0004] The purpose of the utility model is to provide a swing test device for PVC water inlet pipe production inspection, so as to solve the problems put forward in the above background technique.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A swing test device for PVC water inlet pipe production inspection, the swing test device includes an installation base plate, a support device, a swing device, a distribution box, a round pipe limiting device, and a counterweight installation device. The installation base plate is fixedly connected with the support device, the installation base plate is fixedly connected with the distribution box, the swing device is fixedly connected with the support device, the round pipe limiting device is fixedly connected with the support device, and the counterweight installation device is fixedly connected with the support device.

[0007] The installation base plate contacts the ground, is responsible for the fixation and movement of the device, positions and installs other devices through the support device, installs and conducts swing tests on the PVC water inlet pipe through the swing device. The swing device controls the amplitude and speed of the swing during the test. The distribution box supplies power to each device. The round pipe limiting device limits the movement range of the PVC water inlet pipe within this area. During the test, the anti-bending performance of the PVC water inlet pipe is reflected by recording the number of collisions of the PVC water inlet pipe. The counterweight installation device conducts counterweight installation on the PVC water inlet pipe for the experiment to offset the influence of the uneven weight distribution of the PVC water inlet pipe on the test.

[0008] Furthermore, the mounting base plate includes a support chassis, pulleys, a right-angled steel plate, and a base plate frame. The support chassis is threadedly connected to the base plate frame. The pulleys are rotatably connected to the right-angled steel plate. The right-angled steel plate is fixedly connected to the base plate frame.

[0009] The support chassis is used for fixing the overall device. When the device needs to be moved, the support chassis is retracted, and the device is moved through the pulleys. After moving to the corresponding position, when fixation is required, the support chassis is lowered. At the same time, the base plate frame provides stability for the overall device.

[0010] Furthermore, the support device includes a panel, rib plates, a support base plate, vertical plates, and a support frame. The panel is fixedly connected to the base plate frame. The panel is fixedly connected to the support base plate. There is a swing groove on the panel. The rib plates are fixedly connected to the support base plate. The rib plates are fixedly connected to the vertical plates. The support base plate is fixedly connected to the vertical plates. The support frame is fixedly connected to the vertical plates.

[0011] The panel is used for installing the support base plate and also for installing the distribution box. The support base plate fixes the vertical plates and rib plates, providing a stability foundation for them. The rib plates are in a right-angled structure, preventing the vertical plates from shaking in this direction during the swinging process. At the same time, the vertical plates are also the installation foundation for other devices. The support frame connects the two vertical plates, providing stability for the vertical plates again and greatly reducing the shaking of the vertical plates during the swing test.

[0012] Furthermore, the swinging device includes a square shaft, a fixing plate, a connecting chassis, fixing parts, a motor, and a solid material bolt. The square shaft is fixedly connected to the fixing plate. There is a feeding hole on the square shaft. There is a threaded hole on the square shaft, and the threaded hole communicates with the feeding hole. The fixing plate is fixedly connected to the connecting chassis. The fixing parts are fixedly connected to the vertical plates. The fixing parts are rotatably connected to the output end of the motor. The motor is fixedly connected to the vertical plates. The output end of the motor is fixedly connected to the connecting chassis. The solid material bolt is threadedly connected to the square shaft through the threaded hole.

[0013] The PVC inlet water pipe is installed through the feeding hole on the square shaft and fixed by the solid material bolt, so that the PVC inlet water pipe is fixed in the feeding hole and no longer moves up and down. The square shaft is fixed by the fixing plate, the fixing plate is installed and fixed by the connecting chassis, and the device is fixed on the vertical plates through the fixing parts. The motor outputs a torque that is transmitted to the connecting chassis. The connecting chassis rotates to drive the fixing plate to rotate. The fixing plate rotates to drive the square shaft to rotate. The rotation of the square shaft causes the PVC inlet water pipe fixed in the feeding hole to swing.

[0014] Further, the circular pipe limiting device includes a limiter, a limiting column, a fixator, a connecting plate, and a fixing piece. The limiter is firmly connected to the limiting column. The fixator is provided with an installation cavity. Both ends of the limiting column are respectively inserted into the installation cavity. The connecting plate is fixed to the fixator. The up-and-down movement of the fixing piece drives the up-and-down movement of the connecting plate. The fixator is slidably connected to the vertical plate. The limiting column and the installation cavity are firmly connected. The connecting plate and the fixing piece are firmly connected.

[0015] The limiter is used for limiting the PVC water inlet pipe. The limiting column is used for installing the limiter. The fixator connects the limiting column and the connecting plate. The connecting plate moves on the vertical plate to the height corresponding to the PVC water inlet pipe. The movement of the connecting plate drives the up-and-down movement of the fixing piece. Then, the connecting plate and the fixing piece are fixed on the vertical plate, and the swing amplitude at different positions of the PVC water inlet pipe can be tested.

[0016] Further, the counterweight installation device includes a first cylinder, a connecting rod, a second cylinder, and a counterweight block. The first cylinder is fixedly connected to the vertical plate. The output end of the first cylinder is fixedly connected to the connecting rod. The second cylinder is fixedly connected to the connecting rod. The output end of the second cylinder is connected to the counterweight block.

[0017] After the counterweight is completed: The output end of the second cylinder is not in contact with the counterweight block.

[0018] The connecting rod is used for installing the second cylinder. The first cylinder is used to move the connecting rod below the PVC water inlet pipe. The position of the second cylinder on the connecting rod corresponds to below the pipe orifice of the corresponding PVC water inlet pipe. The second cylinder sends the counterweight block into the PVC water inlet pipe. The counterweight block is installed on the PVC water inlet pipe. The second cylinder retracts, and the first cylinder retracts.

[0019] Further, the vertical plate is provided with a long slot and a square slot. The first cylinder is located in the square slot. The first cylinder is firmly connected to the square slot. The fixing piece is slidably connected to the long slot. The connecting plate is slidably connected to the long slot.

[0020] The long slot is used for installing the fixing piece and the connecting plate, so that the fixing piece and the connecting plate can be fixedly connected at any position in the long slot. The square slot is used for fixedly installing the first cylinder.

[0021] Further, the counterweight block includes a counterweight body, a counterweight cylinder, and a gasket. The counterweight body is fixedly connected to the counterweight cylinder. The counterweight body is provided with an installation groove. The output end of the second cylinder and the installation groove have the same diameter. The counterweight cylinder is fixedly connected to the gasket.

[0022] The counterweight body serves as the main counterweight and bears the main weight. When the counterweight cylinder works, it outputs displacement outward to abut the gasket against the inner wall of the PVC water inlet pipe, and continues to work until the counterweight body does not fall, and the counterweight cylinder stops outputting displacement.

[0023] Compared with the prior art, the beneficial effects achieved by the utility model are as follows: In the utility model, at the beginning, the PVC inlet pipe is sent into the feeding hole until the PVC inlet pipe reaches the working area of the stopper. The first cylinder starts to work and sends the connecting rod under the PVC inlet pipe. Then, the second cylinder sends the counterweight block into the PVC inlet pipe. Then, the counterweight cylinder starts to work, squeezes the gasket against the inner wall of the PVC inlet pipe, and fixes the counterweight body inside the PVC inlet pipe, thus completing the installation of the counterweight. Then, the fixing bolt is tightened to fix the PVC inlet pipe. The speed and rotation amplitude of the motor are adjusted through the distribution box, and the motor starts to work. The square shaft starts to rotate, and the swinging condition of the PVC inlet pipe in the stopper is recorded. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings are used to provide a further understanding of the utility model and constitute a part of the specification. They are used together with the embodiments of the utility model to explain the utility model and do not constitute a limitation to the utility model. In the drawings:

[0025] Figure 1 is the overall structural schematic diagram of the utility model;

[0026] Figure 2 is the installation structural schematic diagram of the swinging device of the utility model;

[0027] Figure 3 is the installation structural schematic diagram of the counterweight installation device of the utility model;

[0028] Figure 4 is the structural schematic diagram of the swinging device of the utility model;

[0029] Figure 5 is the structural schematic diagram of the circular pipe limiting device of the utility model;

[0030] Figure 6 is Figure 3 the enlarged view of the partial A;

[0031] Figure 7 is the structural schematic diagram of the pulley of the utility model;

[0032] In the figure: 1 - mounting base plate, 11 - support chassis, 12 - pulley, 13 - right-angled steel plate, 14 - base plate frame, 2 - support device, 21 - panel, 211 - swing groove, 22 - rib plate, 23 - support base plate, 24 - vertical plate, 241 - long strip groove, 242 - square groove, 25 - support frame, 3 - swing device, 31 - square shaft, 311 - feed hole, 32 - fixing plate, 33 - connecting chassis, 34 - fixing piece, 35 - motor, 36 - solid material bolt, 4 - distribution box, 5 - circular pipe limiting device, 51 - limiter, 52 - limiting column, 53 - fixator, 54 - connecting plate, 55 - fixing piece, 6 - counterweight mounting device, 61 - first cylinder, 62 - connecting rod, 63 - second cylinder, 64 - counterweight block, 641 - counterweight body, 642 - counterweight cylinder, 643 - gasket. Detailed implementation manner

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] The present invention provides the following technical solutions:

[0035] As Figures 1 to 3 shown, a swing test device for the production and detection of PVC inlet pipes, the swing test device includes a mounting base plate 1, a support device 2, a swing device 3, a distribution box 4, a circular pipe limiting device 5, and a counterweight mounting device 6. The mounting base plate 1 is fixedly connected to the support device 2, the mounting base plate 1 is fixedly connected to the distribution box 4, the swing device 3 is fixedly connected to the support device 2, the circular pipe limiting device 5 is fixedly connected to the support device 2, and the counterweight mounting device 6 is fixedly connected to the support device 2.

[0036] The mounting base plate 1 is in contact with the ground, responsible for the fixation and movement of the device. Other devices are positioned and installed through the support device 2. The PVC inlet pipe is installed and subjected to a swing test through the swing device 3. The swing device 3 controls the amplitude and speed of the swing during the test. Power is supplied to each device through the distribution box 4. The movement range of the PVC inlet pipe is restricted within this area through the circular pipe limiting device 5. During the test, the anti-bending performance is reflected by recording the number of collisions of the PVC inlet pipe. The counterweight mounting device 6 is used to mount a counterweight on the PVC inlet pipe being tested to offset the influence of the uneven weight distribution of the PVC inlet pipe on the test.

[0037] As Figures 1 to 3 and Figure 7As shown, the mounting base plate 1 includes a supporting chassis 11, a pulley 12, a right-angle steel plate 13, and a base plate frame 14. The supporting chassis 11 is threadedly connected to the base plate frame 14, the pulley 12 is rotatably connected to the right-angle steel plate 13, and the right-angle steel plate 13 is fastened to the base plate frame 14.

[0038] The support chassis 11 is used to fix the entire device. When the device needs to be moved, the support chassis 11 is folded up and the device is moved by the pulley 12. After moving to the corresponding position, the support chassis 11 is lowered when it needs to be fixed. At the same time, the base frame 14 provides stability for the entire device.

[0039] like Figures 1 to 3 As shown, the supporting device 2 includes a panel 21, a rib plate 22, a supporting base plate 23, a vertical plate 24, and a supporting frame 25. The panel 21 is fastened to the base plate frame 14, the panel 21 is fixedly connected to the supporting base plate 23, a swinging groove 211 is provided on the panel 21, the rib plate 22 is fixedly connected to the supporting base plate 23, the rib plate 22 is fixedly connected to the vertical plate 24, the supporting base plate 23 is fixedly connected to the vertical plate 24, and the supporting frame 25 is fastened to the vertical plate 24.

[0040] The panel 21 is used for installing the supporting base plate 23 and also for installing the distribution box 4. The supporting base plate 23 fixes the vertical plate 24 and the rib plate 22 to provide a stability basis. The rib plate 22 is a right-angle structure, so that the vertical plate 24 will not shake in this direction during the swinging process. At the same time, the vertical plate 24 is also the installation basis for other devices. The supporting frame 25 connects the two vertical plates 24, once again providing stability for the vertical plate 24, greatly reducing the shaking of the vertical plate 24 during the swing test.

[0041] like Figure 1 and Figure 4 As shown, the swing device 3 includes a square shaft 31, a fixed plate 32, a connecting chassis 33, a fixing member 34, a motor 35, and a fixing bolt 36. The square shaft 31 is fixedly connected to the fixed plate 32. A feed hole 311 is provided on the square shaft 31. A threaded hole is provided on the square shaft 31. The threaded hole is communicated with the feed hole 311. The fixed plate 32 is fastened to the connecting chassis 33. The fixing member 34 is fastened to the vertical plate 24. The fixing member 34 is rotatably connected to the output end of the motor 35. The motor 35 is fastened to the vertical plate 24. The output end of the motor 35 is fixedly connected to the connecting chassis 33. The fixing bolt 36 is threadedly connected to the square shaft 31 through the threaded hole.

[0042] Install the PVC water inlet pipe through the feed hole 311 on the square shaft 31, and fix the PVC water inlet pipe with the fixing bolt 36, so that the PVC water inlet pipe is fixed in the feed hole 311 and does not move up and down. Fix the square shaft 31 through the fixing plate 32, install and fix the fixing plate 32 through the connecting chassis 33, and then fix the device on the vertical plate 24 through the fixing member 34. The motor 35 outputs a rotational torque and transmits it to the connecting chassis 33. The connecting chassis 33 rotates to drive the fixing plate 32 to rotate, the fixing plate 32 rotates to drive the square shaft 31 to rotate, and the rotation of the square shaft 31 causes the PVC water inlet pipe fixed in the feed hole 311 to swing.

[0043] As Figure 3 and Figure 5 As shown in the figure, the circular pipe limiting device 5 includes a limiter 51, a limiting column 52, a fixer 53, a connecting plate 54, and a fixing piece 55. The limiter 51 is firmly connected to the limiting column 52. The fixer 53 is provided with an installation cavity, and both ends of the limiting column 52 are respectively inserted into the installation cavity. The connecting plate 54 is fixed on the fixer 53. The up and down movement of the fixing piece 55 drives the up and down movement of the connecting plate 54. The fixer 53 is slidably connected to the vertical plate 24. The limiting column 52 is firmly connected to the installation cavity, and the connecting plate 54 is firmly connected to the fixing piece 55.

[0044] The limiter 51 is used to limit the PVC water inlet pipe. The limiting column 52 is used for the installation of the limiter 51. The fixer 53 connects the limiting column 52 and the connecting plate 54. The connecting plate 54 moves on the vertical plate 24 to the height corresponding to the PVC water inlet pipe. The movement of the connecting plate 54 drives the up and down movement of the fixing piece 55, and then the connecting plate 54 and the fixing piece 55 are fixed on the vertical plate 24, so as to test the swing amplitude at different positions of the PVC water inlet pipe.

[0045] As Figure 3 and Figure 6 As shown in the figure, the counterweight installation device 6 includes a first cylinder 61, a connecting rod 62, a second cylinder 63, and a counterweight 64. The first cylinder 61 is fixedly connected to the vertical plate 24. The output end of the first cylinder 61 is fixedly connected to the connecting rod 62. The second cylinder 63 is fixedly connected to the connecting rod 62. The output end of the second cylinder 63 is connected to the counterweight 64.

[0046] After the counterweight is completed: the output end of the second cylinder 63 does not contact the counterweight 64.

[0047] The connecting rod 62 is used for the installation of the second cylinder 63. The first cylinder 61 is used to move the connecting rod 62 below the PVC water inlet pipe. The position of the second cylinder 63 on the connecting rod 62 corresponds to below the corresponding PVC water inlet pipe nozzle. The second cylinder 63 sends the counterweight 64 into the PVC water inlet pipe, the counterweight 64 is installed on the PVC water inlet pipe, the second cylinder 63 retracts, and the first cylinder 61 retracts.

[0048] As shown Figure 3 in the figure, the vertical plate 24 is provided with a long strip groove 241 and a square groove 242. The first cylinder 61 is located in the square groove 242, and the first cylinder 61 is fixedly connected to the square groove 242. The fixing piece 55 is slidably connected to the long strip groove 241, and the connecting plate 54 is slidably connected to the long strip groove 241.

[0049] The long strip groove 241 is used for the installation of the fixing piece 55 and the connecting plate 54, so that the fixing piece 55 and the connecting plate 54 can be fixedly connected at any position of the long strip groove 241. The square groove 242 is used for the fixed installation of the first cylinder 61.

[0050] As shown Figure 6 in the figure, the counterweight 64 includes a counterweight body 641, a counterweight cylinder 642, and a gasket 643. The counterweight body 641 is fixedly connected to the counterweight cylinder 642. An installation groove is provided on the counterweight body 641. The output end of the second cylinder 63 has the same diameter as the installation groove. The counterweight cylinder 642 is fixedly connected to the gasket 643.

[0051] The counterweight body 641 serves as the main counterweight and bears the main weight. When the counterweight cylinder 642 works, it outputs displacement outward to abut the gasket 643 against the inner wall of the PVC water inlet pipe, and continues to work until the counterweight body 641 does not fall, and the counterweight cylinder 642 stops outputting displacement.

[0052] The working principle of the present utility model: At the beginning, the PVC water inlet pipe is sent into the feeding hole 311 until the PVC water inlet pipe reaches the working area of the stopper 51. The first cylinder 61 starts to work to send the connecting rod 62 below the PVC water inlet pipe. Then the second cylinder 63 sends the counterweight 64 into the PVC water inlet pipe. Then the counterweight cylinder 642 starts to work to squeeze the gasket 643 against the inner wall of the PVC water inlet pipe to fix the counterweight body 641 inside the PVC water inlet pipe, thus completing the installation of the counterweight. Then the solid material bolt 36 is tightened to fix the PVC water inlet pipe. The speed and rotation amplitude of the motor 35 are adjusted through the distribution box 4. The motor 35 starts to work, and the square shaft 31 starts to rotate, and the swing condition of the PVC water inlet pipe in the stopper 51 is recorded.

[0053] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0054] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A swing test equipment for production and testing of PVC water inlet pipes, characterized by: The swing test equipment comprises a mounting base (1), a supporting device (2), a swing device (3), a distribution box (4), a round tube limiting device (5), and a counterweight mounting device (6); the mounting base (1) is tightly connected to the supporting device (2), the mounting base (1) is tightly connected to the distribution box (4), the swing device (3) is tightly connected to the supporting device (2), the round tube limiting device (5) is tightly connected to the supporting device (2), and the counterweight mounting device (6) is tightly connected to the supporting device (2).

2. A swing test equipment for production and inspection of PVC water inlet pipes according to claim 1, characterized in that: The mounting base plate (1) comprises a supporting base plate (11), a pulley (12), a right-angle steel plate (13), and a base plate frame (14); the supporting base plate (11) is fixedly connected to the base plate frame (14); the pulley (12) is rotatably connected to the right-angle steel plate (13); and the right-angle steel plate (13) is fixedly connected to the base plate frame (14).

3. A swing test equipment for production and inspection of PVC water inlet pipes according to claim 1, characterized in that: The support device (2) comprises a panel (21), a rib plate (22), a support base plate (23), a vertical plate (24), and a support frame (25); the panel (21) is fastened to the base plate frame (14); the panel (21) is fixedly connected to the support base plate (23); a swing groove (211) is provided on the panel (21); the rib plate (22) is fixedly connected to the support base plate (23); the rib plate (22) is fixedly connected to the vertical plate (24); the support base plate (23) is fixedly connected to the vertical plate (24); and the support frame (25) is fastened to the vertical plate (24).

4. A swing test equipment for production and inspection of PVC water inlet pipes according to claim 1, characterized in that: The swing device (3) comprises a square shaft (31), a fixing plate (32), a connecting chassis (33), a fixing member (34), a motor (35), and a fixing bolt (36); the square shaft (31) is fixedly connected to the fixing plate (32); a feeding hole (311) is provided on the square shaft (31); a threaded hole is provided on the square shaft (31); the threaded hole is communicated with the feeding hole (311); the fixing plate (32) is fastened to the connecting chassis (33); the fixing member (34) is fastened to the vertical plate (24); the fixing member (34) is rotatably connected to the output end of the motor (35); the motor (35) is fastened to the vertical plate (24); the output end of the motor (35) is fixedly connected to the connecting chassis (33); and the fixing bolt (36) is threadedly connected to the square shaft (31) through the threaded hole.

5. A swing test equipment for production and testing of PVC water inlet pipes according to claim 1, characterized in that: The circular tube limiting device (5) comprises a limiter (51), a limit column (52), a fixer (53), a connecting plate (54), and a fixing plate (55); the limiter (51) is tightly connected to the limit column (52); the fixer (53) is provided with a mounting cavity; two ends of the limit column (52) are respectively inserted into the mounting cavity; the connecting plate (54) is fixed to the fixer (53); the fixing plate (55) moves up and down to drive the connecting plate (54) to move up and down; the fixer (53) is slidably connected to the vertical plate (24); the limit column (52) is tightly connected to the mounting cavity; and the connecting plate (54) is tightly connected to the fixing plate (55).

6. A swing test equipment for production and inspection of PVC water inlet pipes according to claim 5, characterized in that: The counterweight installation device (6) comprises a first cylinder (61), a connecting rod (62), a second cylinder (63), and a counterweight block (64); the first cylinder (61) is tightly connected to the vertical plate (24); the output end of the first cylinder (61) is fixedly connected to the connecting rod (62); the second cylinder (63) is fixedly connected to the connecting rod (62); and the output end of the second cylinder (63) is connected to the counterweight block (64); When counterweighting: the output end of the second cylinder (63) abuts against the counterweight block (64).

7. A swing test equipment for production and inspection of PVC water inlet pipes according to claim 6, characterized in that: The vertical plate (24) is provided with a long groove (241) and a square groove (242); the first cylinder (61) is located in the square groove (242); the first cylinder (61) is fastened to the square groove (242); the fixing plate (55) is slidably connected to the long groove (241); and the connecting plate (54) is slidably connected to the long groove (241).

8. The swing test equipment for production and inspection of PVC water inlet pipes according to claim 6, characterized in that: The counterweight block (64) comprises a counterweight body (641), a counterweight cylinder (642), and a gasket (643); the counterweight body (641) and the counterweight cylinder (642) are tightly connected; a mounting groove is provided on the counterweight body (641); the output end of the second cylinder (63) and the mounting groove have the same diameter; and the counterweight cylinder (642) and the gasket (643) are fixedly connected.

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