A bending resistance test device for HDPE double-wall corrugated pipe production

Abstract

The present invention relates to the technical field of HDPE double-wall corrugated pipe testing, and discloses a bending resistance testing device for HDPE double-wall corrugated pipe production, including a workbench, a positioning clamping mechanism and a bending resistance testing mechanism. A HDPE double-wall corrugated pipe body is arranged above the workbench, and extension pipes are fixedly arranged at both ends of the HDPE double-wall corrugated pipe body. The positioning clamping mechanism is arranged at both ends of the top of the workbench, and the positioning clamping mechanism is clamped on the outside of the extension pipe; the bending resistance testing mechanism is arranged in the middle of the top of the workbench, and the bending resistance testing mechanism is arranged on the outside of the HDPE double-wall corrugated pipe body. The present invention facilitates automatic control of the positioning clamping mechanism to move the positioning clamping extension pipe left and right, so as to more stably support the HDPE double-wall corrugated pipe, improve the accuracy of the test, and perform bending resistance testing in the middle of the outside of the HDPE double-wall corrugated pipe. The test position can be adjusted 360 degrees to perform all-round pressure-dynamic bending resistance testing operations, which greatly improves the bending resistance test effect.

Description

Technical Field

[0001] The invention relates to the technical field of HDPE double-wall corrugated pipe testing, in particular to a bending resistance testing device for HDPE double-wall corrugated pipe production. Background Art

[0002] HDPE double-wall corrugated pipe, referred to as PE corrugated pipe, is a new type of lightweight pipe made of high-density polyethylene. It has the characteristics of light weight, high pressure resistance, good toughness, fast construction and long life. Its excellent wall structure design greatly reduces the cost compared with other structures of pipes. It is widely used at home and abroad due to its convenient and reliable connection, replacing concrete pipes and cast iron pipes in large quantities. The outer wall is annular corrugated structure, which greatly enhances the ring stiffness of the pipe, thereby enhancing the resistance of the pipe to soil load. In this performance, HDPE double-wall corrugated pipe has obvious advantages over other pipes. The brittle temperature of HDPE double-wall corrugated pipe is -70℃. Under general low temperature conditions (above -30℃), no special protective measures are required during construction, and winter construction is convenient. Moreover, HDPE double-wall corrugated pipe has good impact resistance; unique structure, high external pressure resistance, impact resistance, ring flexibility, smooth inner wall and small friction resistance, the same inner diameter pipe can pass a larger flow; socket joint, flexible connection, convenient connection, high reliability, not easy to leak.

[0003] The existing HDPE double-wall corrugated pipe needs to be tested for bending resistance during production, but it is inconvenient to stably position and clamp the pipe body, which may cause overall damage during the test and reduce the accuracy of the test. The existing testing agency can only perform bending resistance tests on a single location, the test effect is poor, and the test range is relatively limited. Therefore, it is necessary to design a corresponding technical solution to solve this problem. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides a bending resistance testing device for the production of HDPE double-wall corrugated pipes, which solves the technical problems that it is inconvenient to stably position and clamp the pipe body, which may cause overall damage during testing and reduce the accuracy of the test. The existing testing mechanism can only perform bending resistance tests on a single location, the test effect is poor, and the test range is relatively limited.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A bending resistance test device for HDPE double-wall corrugated pipe production, comprising a workbench, a positioning clamping mechanism and a bending resistance test mechanism, a HDPE double-wall corrugated pipe body is provided above the workbench, extension pipes are fixedly provided at both ends of the HDPE double-wall corrugated pipe body, the positioning clamping mechanism is provided at both ends of the top of the workbench, and the positioning clamping mechanism is clamped on the outside of the extension pipe;

[0008] The bending resistance testing mechanism is arranged at the middle of the top of the workbench, and the bending resistance testing mechanism is arranged outside the HDPE double-wall corrugated pipe body.

[0009] Preferably, the positioning and clamping mechanism includes a support ring and an extension ring, the extension ring is fixedly arranged on the inner wall of the support ring, and the inner diameters of the support ring and the extension ring are the same, and a locking bolt is threadedly penetrated around the extension ring; the extension ring is used to position and clamp the extension tube over a large area, and the locking bolt is used to lock and fix the outer wall of the extension tube.

[0010] Preferably, the positioning and clamping mechanism also includes a cylinder seat and a fixed seat, a fixing rod is fixedly distributed around the fixing seat and between the outer side wall of the support ring, a transverse axis 2 is fixedly provided on the inner side end of the fixing seat, the cylinder seat is fixedly provided on the inner side end of the transverse axis 2, a pneumatic rod is connected and distributed around the cylinder seat, a positioning plate 1 is fixedly provided on the outer side end of the pneumatic rod, a control panel is provided on the outer side end of the fixing seat, and the control panel is electrically connected to the cylinder seat; the fixing seat can be stably positioned and supported by setting up multiple groups of fixing rods, the fixing seat and transverse axis 2 are used to fix and support the cylinder seat, the cylinder seat is used for all-round pneumatic control of the telescopic adjustment of the pneumatic rod, the positioning plate is used to lock and fix the inner wall of the extension tube, and the control panel is used for manual control.

[0011] Preferably, the positioning and clamping mechanism also includes a transverse axis and a lining plate, the transverse axis passes through and is fixedly arranged on the front and rear sides of the support ring near the lower end, the lower end of the transverse axis is fixedly provided with a fixing frame, the fixing frame is in a U-shaped structure, and pulley groups are installed at the two ends of the bottom of the fixing frame, the lining plate is fixedly arranged on the outer end of the fixing frame, the outer end of the lining plate is fixedly provided with a push rod 1, the outer end of the push rod 1 is connected to an electric push rod device 1, and the inner side end of the electric push rod device 1 is fixedly provided with a support plate, and the support plate is fixedly arranged on the two ends of the top of the workbench; the transverse axis 1 and the fixing frame with a U-shaped structure are used to stably support the support ring as a whole, so as to support the positioning and clamping mechanism with high strength, the pulley group is used to stably support the sliding of the upper end of the workbench, so that the left and right movement of the positioning and clamping mechanism is more stable, the electric push rod device 1 and the push rod 1 are used to automatically control the left and right movement of the lining plate, so as to control the left and right movement of the positioning and clamping mechanism, and the support plate is used to fix the support plate to the upper end of the workbench.

[0012] Preferably, the bending resistance testing mechanism includes a slip ring, a positioning ring 1 and a positioning ring 2, the outer sides of the positioning ring 1 and the positioning ring 2 are symmetrically fixed with support rods near the lower ends, the slip ring is limited to the outside of the positioning ring 1 and the positioning ring 2, an empty groove is opened in the middle of the workbench, and the slip ring is limited to the empty groove; the positioning ring 1 and the positioning ring 2 are used to stably support the upper end of the workbench through the support rod, the empty groove is used to limit the rotation of the slip ring, and the slip ring is used to rotate and adjust the position angle of the operation.

[0013] Preferably, a limiting groove is provided in the middle of the outer side of the positioning ring 1 and the positioning ring 2, and the inner side wall of the slip ring is fixedly distributed with positioning plates 2 in double rows, the inner end of the positioning plate 2 is fixedly provided with a cross bar 2, the outer end of the cross bar 2 is fixedly provided with a fixing block 2, the inner end of the fixing block 2 is fixedly provided with a limiting disk 2, and the limiting disk 2 is limited inside the limiting groove; the setting of the limiting groove is used to embed and support the limiting disk 2 to slide, and the fixing block 2, the cross bar 2 and the positioning plate are used to fix and support the inner side wall of the slip ring, so that the slip ring is located outside the positioning ring 1 and the positioning ring 2 and slides in a circular shape to avoid shaking and displacement.

[0014] Preferably, an anti-bending pressing mechanism is provided in the middle of the inner wall of the slip ring, and the anti-bending pressing mechanism includes an electric push rod device 2 and a pressure plate, the electric push rod device 2 is fixedly provided in the middle of the inner wall of the slip ring, the inner end of the electric push rod device 2 is connected to a push rod 2, the pressure plate is fixedly provided at the inner end of the push rod 2, and the electric push rod device 2, the push rod 2 and the pressure plate are all located between the positioning ring 1 and the positioning ring 2, and the inner wall of the pressure plate is an arc structure; a cross bar 1 is fixedly provided on both sides of the electric push rod device 2, a fixed block 1 is fixedly provided on the outer side of the cross bar 1, and the fixed block 1 A limit plate 1 is provided on the inner end, and the limit plate 1 is limited inside the limit groove; the anti-bending pressing mechanism is fixed on the inner wall of the slip ring, so it is convenient to pass through the middle of the positioning ring 1 and the positioning ring 2 to perform pressing and anti-bending operations. The electric push rod device 2 and the push rod 2 are used to automatically control the telescopic adjustment of the pressure plate. The pressure plate is used to directly contact and press the middle of the HDPE double-wall corrugated pipe body. The pressure plate with an arc-shaped inner wall fits the HDPE double-wall corrugated pipe body better. The limit plate 1 is used to limit the sliding to the inside of the limit groove. The fixed block 1 and the cross bar 1 are used to stably support the electric push rod device 2 to slide in a ring.

[0015] Preferably, a fan is provided in front of the pressing plate, heating plates are connected to both sides of the fan, the heating plates are fixedly arranged on both sides of the pressing plate, air outlet ducts are connected to the bottom of the heating plate, a heating control device is connected above the heating plate, and the heating control device is arranged on the top of the pressing plate; the fan is used to supply air to the inside of the heating plate, the heating control device is used to control the heating of the heating plate, and the air outlet duct is used to discharge hot air over a large area for high-temperature bending resistance testing, which greatly enhances the test effect.

[0016] Preferably, a driving mechanism is connected to the front lower end of the slip ring, and convex teeth are fixedly distributed on the outer side wall of the slip ring. The driving mechanism includes a driving gear and a driving motor. The driving gear is meshingly connected to the outer side wall of the convex teeth, and a rotating shaft rod is connected through the interior of the driving gear. Support plates 1 and 2 are rotatably connected at both ends of the rotating shaft rod. A shaft disk 2 is fixedly provided near the left end of the rotating shaft rod. The driving motor is fixedly arranged near the top front end of the workbench, and a driving shaft is connected to the output end of the driving motor. The left end of the driving shaft is rotatably connected to support plate 3. A shaft disc 1 is fixedly provided in the middle of the driving shaft, a gear chain is connected between the shaft disc 1 and the shaft disc 2, and the support plate 1, the support plate 2 and the support plate 3 are all fixedly provided on the top of the workbench; a driving mechanism is provided to drive and control the rotation of the slip ring, a driving motor is used to automatically control the driving shaft and the shaft disc 1 supported on the inner end of the support plate 3 to rotate stably, the shaft disc 1 is used to drive the shaft disc 2 to rotate through the gear chain, so that the rotating shaft rod is supported between the support plate 1 and the support plate 2 to rotate stably, driving the driving gear to rotate stably, and the driving gear engages with the convex teeth fixedly distributed on the outer side wall of the slip ring to control the rotation.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention has the following beneficial effects: by arranging the HDPE double-wall corrugated pipe and the extension pipe above the workbench and the positioning and clamping mechanism arranged at both ends of the top of the workbench, it is convenient to directly place the HDPE double-wall corrugated pipe and the extension pipe between the positioning and clamping mechanism; the positioning and clamping mechanism can be automatically controlled to move the positioning and clamping extension pipe left and right so as to more stably support the HDPE double-wall corrugated pipe, thereby improving the accuracy of the test; by arranging the bending test mechanism in the middle of the top of the workbench, it is convenient to perform the bending test in the middle of the outside of the HDPE double-wall corrugated pipe, and the test position can be adjusted 360 degrees to perform all-round compression bending test operation, thereby greatly improving the bending test effect, having a high safety factor, and being suitable for the production bending test of HDPE double-wall corrugated pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall front upper right three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the inner side structure of the end positioning and clamping mechanism of the HDPE double-wall corrugated pipe of the present invention;

[0021] Figure 3 It is a schematic diagram of the outer side structure of the end positioning and clamping mechanism of the HDPE double-wall corrugated pipe of the present invention;

[0022] Figure 4 It is a schematic diagram of the bending resistance test mechanism at the middle of the HDPE double-wall corrugated pipe of the present invention;

[0023] Figure 5 It is a schematic diagram of the outer ring rotation driving mechanism of the present invention;

[0024] Figure 6 It is a schematic diagram of the partial structure of the bending resistance testing mechanism of the present invention;

[0025] Figure 7 For the present invention Figure 5 The enlarged structural diagram at A in the middle;

[0026] Figure 8 For the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0027] Fig. 9 It is a schematic diagram of the lower structure of the bending resistance testing mechanism of the present invention.

[0028] In the figure, 1, workbench; 11, HDPE double-wall corrugated pipe body; 111, extension pipe; 12, empty slot; 2, positioning clamping mechanism; 21, support ring; 22, extension ring; 221, locking bolt; 23, horizontal axis 1; 231, fixing frame; 232, pulley block; 24, cylinder seat; 241, gas pressure rod; 242, positioning plate 1; 243, control panel; 25, fixing seat; 251, fixing rod; 252, horizontal axis 2; 26, lining plate; 261, electric push rod device 1; 262, push rod 1; 263, support plate; 3, bending test mechanism; 31, slip ring; 311, convex teeth; 32, positioning ring 1; 33, positioning ring 2; 34, support Rod; 35, driving mechanism; 351, driving gear; 352, rotating shaft rod; 353, support plate one; 354, support plate two; 355, driving motor; 356, driving shaft; 357, support plate three; 358, shaft disc one; 359, shaft disc two; 36, anti-bending pressing mechanism; 361, electric push rod device two; 362, push rod two; 363, pressure plate; 364, fan; 3641, heating plate; 3642, air outlet duct; 3643, heating control device; 365, limit plate one; 3651, fixed block one; 3652, cross bar one; 37, limit slot; 38, limit plate two; 381, fixed block two; 382, ​​cross bar two; 383, positioning plate two. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 9The embodiment of the present invention provides a technical solution: a bending resistance test device for HDPE double-wall corrugated pipe production, comprising a workbench 1, a positioning and clamping mechanism 2 and a bending resistance test mechanism 3, a HDPE double-wall corrugated pipe body 11 is provided above the workbench 1, extension pipes 111 are fixedly provided at both ends of the HDPE double-wall corrugated pipe body 11, the positioning and clamping mechanism 2 is provided at both ends of the top of the workbench 1, and the positioning and clamping mechanism 2 is clamped on the outside of the extension pipe 111;

[0031] The bending resistance testing mechanism 3 is arranged at the middle of the top of the workbench 1 , and the bending resistance testing mechanism 3 is arranged outside the HDPE double-wall corrugated pipe body 11 .

[0032] By arranging the HDPE double-wall corrugated pipe body 11 and the extension pipe 111 above the workbench 1 and the positioning and clamping mechanism 2 arranged at both ends of the top of the workbench 1, it is convenient to directly place the HDPE double-wall corrugated pipe body 11 and the extension pipe 111 between the positioning and clamping mechanism 2, and the positioning and clamping mechanism 2 can be automatically controlled to move the positioning and clamping extension pipe 111 left and right, so as to more stably support the HDPE double-wall corrugated pipe body 11, thereby improving the accuracy of the test. By arranging the bending test mechanism 3 in the middle of the top of the workbench 1, it is convenient to perform the bending test in the middle of the outside of the HDPE double-wall corrugated pipe body 11, and the test position can be adjusted 360 degrees to perform all-round compression bending test operations, which greatly improves the bending test effect and has a high safety factor, and is suitable for the bending test of HDPE double-wall corrugated pipe production.

[0033] Further improved, the positioning clamping mechanism 2 includes a support ring 21 and an extension ring 22, the extension ring 22 is fixedly arranged on the inner side wall of the support ring 21, and the inner diameters of the support ring 21 and the extension ring 22 are the same, and a locking bolt 221 is threadedly penetrated around the extension ring 22;

[0034] The extending ring 22 is used to position and clamp the extending tube 111 over a large area, and the locking bolt 221 is used to lock and fix the outer wall of the extending tube 111 .

[0035] Further improved, the positioning clamping mechanism 2 also includes a cylinder seat 24 and a fixed seat 25, a fixing rod 251 is fixedly distributed between the fixed seat 25 and the outer side wall of the support ring 21, a second horizontal axis 252 is fixedly provided at the inner side end of the fixed seat 25, the cylinder seat 24 is fixedly provided at the inner side end of the second horizontal axis 252, a pneumatic rod 241 is connected and distributed around the cylinder seat 24, a positioning plate 1 242 is fixedly provided at the outer end of the pneumatic rod 241, a control panel 243 is provided at the outer side end of the fixed seat 25, and the control panel 243 is electrically connected to the cylinder seat 24;

[0036] By setting up multiple sets of fixing rods 251, the fixing seat 25 can be stably positioned and supported. The fixing seat 25 and the horizontal axis 252 are used to fix and support the cylinder seat 24. The cylinder seat 24 is used for all-round pneumatic control of the telescopic adjustment of the pneumatic rod 241. The positioning plate 1 242 is used to lock and fix the inner wall of the extension tube 111. The control panel 243 is used for manual control.

[0037] Further improved, the positioning and clamping mechanism 2 also includes a horizontal axis 23 and a lining plate 26, the horizontal axis 23 penetrates and is fixedly arranged near the lower end of the front and rear sides of the support ring 21, the lower end of the horizontal axis 23 is fixedly provided with a fixing frame 231, the fixing frame 231 is a U-shaped structure, and the bottom two ends of the fixing frame 231 are installed with pulley blocks 232, the lining plate 26 is fixedly arranged at the outer end of the fixing frame 231, the outer end of the lining plate 26 is fixedly provided with a push rod 262, the outer end of the push rod 262 is connected to an electric push rod device 261, the inner side end of the electric push rod device 261 is fixedly provided with a support plate 263, and the support plate 263 is fixedly arranged at the two ends of the top of the workbench 1;

[0038] The horizontal axis 23 and the U-shaped fixing frame 231 are used to stably support the support ring 21 as a whole, so as to support the positioning and clamping mechanism 2 with high strength. The pulley group 232 is used to stably support the sliding of the upper end of the workbench 1, so that the left and right movement of the positioning and clamping mechanism 2 is more stable. The electric push rod device 261 and the push rod 262 are used to automatically control the left and right movement of the lining plate 26, so as to control the left and right movement of the positioning and clamping mechanism 2. The support plate 263 is used to fix the support plate 263 to the upper end of the workbench 1.

[0039] Further improved, the bending test mechanism 3 includes a slip ring 31, a positioning ring 1 32 and a positioning ring 2 33, and the outer sides of the positioning ring 1 32 and the positioning ring 2 33 are symmetrically fixed with support rods 34 near the lower ends, and the slip ring 31 is limited to the outside of the positioning ring 1 32 and the positioning ring 2 33, and an empty groove 12 is opened in the middle of the workbench 1, and the slip ring 31 is limited to the empty groove 12;

[0040] The positioning ring 1 32 and the positioning ring 2 33 are used to stably support the upper end of the workbench 1 through the support rod 34, and the empty groove 12 is used to limit the rotation of the slip ring 31, and the slip ring 31 is used to rotate to adjust the position angle of the operation.

[0041] Further improved, the middle of the outer sides of the positioning ring 1 32 and the positioning ring 2 33 are provided with a limiting groove 37, and the inner side wall of the slip ring 31 is fixedly provided with a positioning plate 2 383 in double rows, and the inner end of the positioning plate 2 383 is fixedly provided with a cross bar 2 382, ​​and the outer end of the cross bar 2 382 is fixedly provided with a fixing block 2 381, and the inner end of the fixing block 2 381 is fixedly provided with a limiting plate 2 38, and the limiting plate 2 38 is limited inside the limiting groove 37;

[0042] The limit groove 37 is provided for embedded support of the limit plate 2 38 for sliding, and the fixed block 2 381, the cross bar 2 382 and the positioning plate 2 383 are used for fixing and supporting the inner wall of the slip ring 31, so that the slip ring 31 is located outside the positioning ring 1 32 and the positioning ring 2 33 and slides in a circular shape to avoid shaking and displacement.

[0043] Further improved, an anti-bending pressing mechanism 36 is provided in the middle of the inner wall of the slip ring 31, and the anti-bending pressing mechanism 36 includes an electric push rod device 2 361 and a pressure plate 363. The electric push rod device 2 361 is fixedly provided in the middle of the inner wall of the slip ring 31, and the inner end of the electric push rod device 2 361 is connected to a push rod 2 362, and the pressure plate 363 is fixedly provided at the inner end of the push rod 2 362, and the electric push rod device 2 361, the push rod 2 362 and the pressure plate 363 are all located between the positioning ring 1 32 and the positioning ring 2 33, and the inner wall of the pressure plate 363 is an arc structure;

[0044] A cross bar 3652 is fixedly provided on both sides of the electric push rod device 361, a fixing block 3651 is fixedly provided on the outer side of the cross bar 3652, a limiting plate 365 is provided on the inner side end of the fixing block 3651, and the limiting plate 365 is limited inside the limiting groove 37;

[0045] The anti-bending pressing mechanism 36 is fixed on the inner wall of the slip ring 31, so as to pass through the middle of the positioning ring 1 32 and the positioning ring 2 33 to perform the pressing and anti-bending operation. The electric push rod device 2 361 and the push rod 2 362 are used to automatically control the telescopic adjustment of the pressure plate 363. The pressure plate 363 is used to directly contact and press the middle of the HDPE double-wall corrugated pipe body 11. The pressure plate 363 with an arc-shaped inner wall fits the HDPE double-wall corrugated pipe body 11 better. The limit plate 1 365 is used to limit the sliding inside the limit groove 37. The fixed block 1 3651 and the cross bar 1 3652 are used to stably support the electric push rod device 2 361 to slide in a ring shape.

[0046] Further improved, a fan 364 is provided in front of the pressing plate 363, and heating plates 3641 are connected to both sides of the fan 364. The heating plates 3641 are fixedly arranged on both sides of the pressing plate 363, and an air outlet duct 3642 is connected to the bottom of the heating plate 3641. A heating control device 3643 is connected above the heating plate 3641, and the heating control device 3643 is arranged on the top of the pressing plate 363;

[0047] The fan 364 is provided to supply air to the interior of the heating plate 3641, the heating control device 3643 is used to control the heating of the heating plate 3641, and the air outlet pipe 3642 is used to discharge hot air over a large area for high-temperature bending resistance testing, which greatly enhances the test effect.

[0048] Specifically, the front lower end of the slip ring 31 is connected with a driving mechanism 35, and the outer side wall of the slip ring 31 is fixedly distributed with convex teeth 311. The driving mechanism 35 includes a driving gear 351 and a driving motor 355. The driving gear 351 is meshed and connected to the outer side wall of the convex tooth 311. The interior of the driving gear 351 is penetrated and connected with a rotating shaft rod 352. The two ends of the rotating shaft rod 352 are rotatably connected with a support plate 1 353 and a support plate 2 354. A shaft disc 2 359 is fixedly provided near the left end of the rotating shaft rod 352. The driving motor 355 is fixedly arranged at the front end near the top of the workbench 1. The output end of the driving motor 355 is connected with a driving shaft 356. The left end of the driving shaft 356 is rotatably connected with a support plate 357. A shaft disc 1 358 is fixedly provided at the middle of the driving shaft 356. A gear chain is connected between the shaft disc 1 358 and the shaft disc 2 359. The support plates 1 353, 2 354 and 357 are all fixedly arranged on the top of the workbench 1.

[0049] The drive mechanism 35 is used to drive the control slip ring 31 to rotate, the drive motor 355 is used to automatically control the drive shaft 356 and the shaft disc 1 358 supported on the inner end of the support plate 357 to rotate stably, the shaft disc 1 358 is used to drive the shaft disc 2 359 to rotate through a gear chain, so that the shaft rod 352 is supported between the support plate 1 353 and the support plate 2 354 to rotate stably, driving the drive gear 351 to rotate stably, and the drive gear 351 engages with the convex teeth 311 fixedly distributed on the outer wall of the slip ring 31 to control the rotation.

[0050] Working principle: Place the HDPE double-wall corrugated pipe body 11 on the workbench 1;

[0051] First, the electric push rod device 261 of the positioning clamping mechanism 2 is started, and the push rod 262 is automatically controlled to be telescopically adjusted, so that the lining plate 26 drives the fixing frame 231 to move stably supported on the workbench 1 through the pulley group 232, thereby driving the support ring 21 to move inward;

[0052] Place the extension tube 111 inside the extension ring 22 of the positioning and clamping mechanism 2, manually operate the control panel 243, start the telescopic adjustment positioning plate 242 of the air pressure rod 241 around the cylinder seat 24, and the inner wall of the extension tube 111 can be positioned and clamped on the inner wall of the extension ring 22 in all directions, and then the locking bolt 221 is passed through the extension ring 22 to lock the outer wall of the extension tube 111, so that the HDPE double-wall corrugated pipe body 11 can be positioned, clamped and supported as a whole;

[0053] Start the anti-bending pressure mechanism 36 at the anti-bending test mechanism 3, start the electric push rod device 2 361 to automatically control the push rod 2 362 to telescopically adjust the pressure plate 363 to contact the middle of the outer wall of the HDPE double-wall corrugated pipe body 11, and perform the pressure bending test, then start the fan 364 and the heating control device 3643, supply hot air through the heating plate 3641, and finally discharge the hot air through multiple air outlet pipes 3642 to enhance the anti-bending test effect;

[0054] Start the driving mechanism 35 at the bending test mechanism 3, turn on the driving motor 355 to automatically control the driving shaft 356 and the shaft disc 1 358 to support the inner wall of the support plate 357 to rotate stably, and through the gear chain transmission shaft disc 2 359, the rotating shaft rod 352 inside the driving gear 351 is supported between the support plate 1 353 and the support plate 2 354 to rotate stably, thereby engaging and controlling the convex teeth 311 on the outer wall of the slip ring 31, thereby controlling the rotation adjustment test position of the slip ring 31, and the test position can be adjusted 360 degrees to perform all-round compression bending test operations, which greatly improves the bending test effect and has a high safety factor.

[0055] The workbench of the present invention 1, HDPE double-wall corrugated pipe body 11, extension pipe 111, empty groove 12, positioning clamping mechanism 2, support ring 21, extension ring 22, locking bolt 221, horizontal axis 1 23, fixing frame 231, pulley block 232, cylinder seat 24, pneumatic rod 241, positioning plate 1 242, control panel 243, fixing seat 25, fixing rod 251, horizontal axis 2 252, lining plate 26, electric push rod device 1 261, push rod 1 262, support plate 263, bending resistance testing mechanism 3, slip ring 31, convex teeth 311, positioning ring 1 32, positioning ring 2 33, support rod 34. Driving mechanism 35. Driving gear 351. Rotating shaft 352. Support plate 1 353. Support plate 2 354. Driving motor 355. Driving shaft 356. Support plate 3 357. Shaft plate 1 358. Shaft plate 2 359. Anti-bending pressing mechanism 36. Electric push rod device 2 361. Push rod 2 362. Pressing plate 363. Fan 364. Heating plate 3641. Air outlet pipe 3642. Heating control device 3643. Limiting plate 1 365. Fixed block 1 3651. Cross bar 1 3652. Limiting slot 37. Limiting plate 2 38. Fixed block 2 381. Cross bar 2 382. Positioning plate 2 3 83. All the components are universal standard parts or components known to the technicians in this field. Their structures and principles are known to the technicians in this field through technical manuals or conventional experimental methods. The problem solved by the present invention is that it is inconvenient to stably position and clamp the pipe body, which may cause overall damage during the test and reduce the accuracy of the test. The existing testing mechanism can only perform bending resistance test on a certain point, the test effect is poor, and the test range is relatively limited. The present invention combines the above components with each other, and through the HDPE double-wall corrugated pipe and extension pipe arranged above the workbench and the positioning pipes arranged at both ends of the top of the workbench, The clamping mechanism is convenient for directly placing the HDPE double-wall corrugated pipe and the extension pipe between the positioning clamping mechanism, and the positioning clamping mechanism can be automatically controlled to move left and right to position and clamp the extension pipe, so as to more stably support the HDPE double-wall corrugated pipe, thereby improving the accuracy of the test. The bending test mechanism 3 is arranged in the middle of the top of the workbench, so that the bending test is conveniently carried out in the middle of the outer part of the HDPE double-wall corrugated pipe, and the test position can be adjusted 360 degrees to carry out all-round compression bending test operation, which greatly improves the bending test effect and has a high safety factor, and is suitable for the production bending test of HDPE double-wall corrugated pipe.

[0056] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0057] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A bending resistance testing device for HDPE double-wall corrugated pipe production, comprising a workbench (1), a positioning clamping mechanism (2) and a bending resistance testing mechanism (3), characterized in that: A HDPE double-wall corrugated pipe body (11) is provided above the workbench (1), extension pipes (111) are fixedly provided at both ends of the HDPE double-wall corrugated pipe body (11), the positioning clamping mechanism (2) is provided at both ends of the top of the workbench (1), and the positioning clamping mechanism (2) is clamped on the outside of the extension pipe (111); The bending resistance testing mechanism (3) is arranged at the middle of the top of the workbench (1), and the bending resistance testing mechanism (3) is arranged outside the HDPE double-wall corrugated pipe body (11); The bending resistance testing mechanism (3) comprises a slip ring (31), a first positioning ring (32) and a second positioning ring (33); support rods (34) are symmetrically fixed near the lower ends of the outer sides of the first positioning ring (32) and the second positioning ring (33); the slip ring (31) is limited to the outside of the first positioning ring (32) and the second positioning ring (33); an empty groove (12) is opened in the middle of the workbench (1), and the slip ring (31) is limited to the empty groove (12); The middle of the outer sides of the positioning ring 1 (32) and the positioning ring 2 (33) are both provided with a limiting groove (37); the inner side wall of the slip ring (31) is provided with a positioning plate 2 (383) fixedly arranged in double rows; the inner end of the positioning plate 2 (383) is fixedly provided with a cross bar 2 (382); the outer end of the cross bar 2 (382) is fixedly provided with a fixing block 2 (381); the inner end of the fixing block 2 (381) is fixedly provided with a limiting plate 2 (38); the limiting plate 2 (38) is limited inside the limiting groove (37); An anti-bending pressing mechanism (36) is provided in the middle of the inner wall of the slip ring (31), and the anti-bending pressing mechanism (36) comprises an electric push rod device 2 (361) and a pressure plate (363), the electric push rod device 2 (361) is fixedly provided in the middle of the inner wall of the slip ring (31), the inner end of the electric push rod device 2 (361) is connected to a push rod 2 (362), the pressure plate (363) is fixedly provided at the inner end of the push rod 2 (362), and the electric push rod device 2 (361), the push rod 2 (362) and the pressure plate (363) are all located between the positioning ring 1 (32) and the positioning ring 2 (33), and the inner wall of the pressure plate (363) is an arc-shaped structure; A cross bar (3652) is fixedly provided on both sides of the electric push rod device (361); a fixing block (3651) is fixedly provided on the outer side of the cross bar (3652); a limiting plate (365) is provided on the inner side end of the fixing block (3651); the limiting plate (365) is limited inside the limiting groove (37); A fan (364) is provided in front of the pressing plate (363), heating plates (3641) are connected to both sides of the fan (364), the heating plates (3641) are fixedly arranged on both sides of the pressing plate (363), an air outlet pipe (3642) is connected to the bottom of the heating plate (3641), a heating control device (3643) is connected to the top of the heating plate (3641), and the heating control device (3643) is arranged on the top of the pressing plate (363); The front lower end of the slip ring (31) is connected to a driving mechanism (35), and the outer wall of the slip ring (31) is fixedly provided with convex teeth (311). The driving mechanism (35) comprises a driving gear (351) and a driving motor (355). The driving gear (351) is meshingly connected to the outer wall of the convex teeth (311). A rotating shaft rod (352) is connected through the interior of the driving gear (351). The two ends of the rotating shaft rod (352) are rotatably connected to a supporting plate 1 (353) and a supporting plate 2 (354). The rotating shaft rod (352) is fixedly provided near the left end. There is a second shaft disc (359), the driving motor (355) is fixedly arranged at the top near the front end of the workbench (1), the output end of the driving motor (355) is connected to the driving shaft (356), the left end of the driving shaft (356) is rotatably connected to the third support plate (357), the middle of the driving shaft (356) is fixedly provided with a shaft disc (358), a gear chain is connected between the shaft disc (358) and the second shaft disc (359), and the first support plate (353), the second support plate (354) and the third support plate (357) are all fixedly arranged on the top of the workbench (1).

2. The bending resistance testing device for HDPE double-wall corrugated pipe production according to claim 1, characterized in that: The positioning clamping mechanism (2) comprises a support ring (21) and an extension ring (22); the extension ring (22) is fixedly arranged on the inner wall of the support ring (21); the support ring (21) and the extension ring (22) have the same inner diameter; a locking bolt (221) is threadedly penetrated around the extension ring (22).

3. A bending resistance testing device for HDPE double-wall corrugated pipe production according to claim 2, characterized in that: The positioning clamping mechanism (2) also includes a cylinder seat (24) and a fixed seat (25), a fixing rod (251) is fixedly distributed around the fixed seat (25) and between the outer side wall of the support ring (21), a second horizontal axis (252) is fixedly provided at the inner side end of the fixed seat (25), the cylinder seat (24) is fixedly provided at the inner side end of the second horizontal axis (252), a pneumatic rod (241) is connected and distributed around the cylinder seat (24), a positioning plate (242) is fixedly provided at the outer end of the pneumatic rod (241), a control panel (243) is provided at the outer side end of the fixed seat (25), and the control panel (243) is electrically connected to the cylinder seat (24).

4. The bending resistance testing device for HDPE double-wall corrugated pipe production according to claim 3 is characterized by: The positioning and clamping mechanism (2) further comprises a transverse axis (23) and a lining plate (26); the transverse axis (23) passes through and is fixedly arranged near the lower end of the front and rear sides of the support ring (21); a fixing frame (231) is fixedly arranged at the lower end of the transverse axis (23); the fixing frame (231) is in a U-shaped structure; pulley blocks (232) are installed at both ends of the bottom of the fixing frame (231); the lining plate (26) is fixedly arranged at the outer end of the fixing frame (231); a push rod (262) is fixedly arranged at the outer end of the lining plate (26); the outer end of the push rod (262) is connected to an electric push rod device (261); a support plate (263) is fixedly arranged at the inner end of the electric push rod device (261); and the support plate (263) is fixedly arranged at both ends of the top of the workbench (1).

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