Hydraulic test head and fully automatic six-station hydraulic press

Abstract

The present invention belongs to the technical field of water pressure experiment, and specifically relates to a water pressure test head and a full-automatic six-station hydraulic press, wherein the water pressure test head is arranged at the end of a pipe to be tested, comprises a base and a side cover, a side cover through hole is penetrated through the middle of one side of the side cover, the base comprises an integrally formed guide part and a sealing part, a base guide hole is opened on one side of the guide part, the base guide hole is in a trumpet shape, a base connecting hole is opened on one side of the sealing part, and a sealing component is arranged in the base connecting hole; the full-automatic six-station hydraulic press comprises a water pressure test head and a pushing component, the pushing component comprises a box body, a pushing hydraulic cylinder is arranged on one side of the box body, a moving seat is connected to the output end of the pushing hydraulic cylinder, and six moving components are arranged on the moving seat; the present invention can simultaneously detect the pressure bearing capacity of multiple pipes to be tested, and the pipes will not come into contact with the elastic sealing ring during the detection process, so as to avoid the elastic sealing ring being damaged due to friction.

Description

Technical Field

[0001] The invention belongs to the technical field of water pressure experiments, and in particular relates to a water pressure test head and a full-automatic six-station water press. Background Art

[0002] The water pressure test is an experiment to test the water pressure that the pipeline can withstand and to check whether there is any leakage or damage in the pipeline. Usually, a hydraulic press is used to perform the water pressure test. When using a hydraulic pressure tester to perform water pressure testing on pipes, it is necessary to insert water pressure test heads at both ends of the pipe and use the water pressure test heads to radially seal the ends of the pipe.

[0003] At present, a water pressure test head is usually provided with a U-shaped sealing ring at the connection hole inside the water pressure test head, and the water in the pipe is prevented from flowing out by the rubber U-shaped sealing ring. When the pipe is inserted into the water pressure test head, friction occurs between the pipe and the U-shaped sealing ring in the connection hole of the water pressure test head. When the water pressure test of the pipe is carried out, the force on the pipe and the relative movement between the U-shaped sealing ring occur, which can easily cause wear to the U-shaped sealing ring, resulting in inaccurate test results of the water pressure test. At the same time, as the water pressure inside the pipe continues to increase, the pressure on the U-shaped sealing ring also gradually increases. The pressure bearing capacity of the rubber U-shaped sealing ring is relatively weak. When the water pressure is high, the U-shaped sealing ring will be damaged, causing water to flow out from the gap between the pipe and the water pressure test head, thereby resulting in inaccurate test results of the water pressure test. Summary of the invention

[0004] The object of the present invention is to provide a water pressure test head and a fully automatic six-station hydraulic press, which can avoid wear of the elastic sealing ring and ensure the accuracy of the test results.

[0005] The technical solution of the present invention is as follows: a water pressure test head is arranged at the end of a pipe to be tested, comprising a base and a side cover, wherein the side cover is connected to the side wall of the base, a side cover through hole is penetrated through the middle of the side cover, the base comprises an integrally formed guide part and a sealing part, the guide part is arranged on one side of the sealing part, a base guide hole is opened in the middle of the guide part, the base guide hole is trumpet-shaped, and the small-diameter end of the base guide hole is close to the sealing part; a base connecting hole is opened in the middle of the sealing part, and the base connecting hole is connected to the base guide hole, the center of the base connecting hole corresponds to the center of the side cover through hole, and a sealing component is embedded in the base connecting hole;

[0006] The sealing assembly comprises an inner sealing ring and a sealing ring component, wherein the inner sealing ring is embedded in the interior of the base connecting hole, and one side of the inner sealing ring is in contact with the side wall of the guide part; a sealing ring component is in contact with one side of the inner sealing ring, and the sealing ring component comprises an elastic sealing ring and an outer support ring covered on the outer diameter of the elastic sealing ring, a plurality of arc-shaped support blocks are evenly arranged on the inner side of the elastic sealing ring, and there is a gap between two adjacent support blocks, and the plurality of support blocks are closed to form a ring-shaped inner support ring; two drainage grooves are circumferentially arranged on the outer surface of the elastic sealing ring, and the two drainage grooves are symmetrically arranged on the outer diameter of the elastic sealing ring; the side wall of the outer support ring is in contact with the inner wall of the base connecting hole, and a plurality of oil holes are penetrated on the outer diameter of the outer support ring, and the plurality of oil holes are evenly distributed on the outer diameter of the outer support ring, and a notch is axially arranged on the outer diameter of the outer support ring; the elastic sealing ring, the outer support ring and the inner support ring are all located between the inner sealing ring and the side cover;

[0007] An oil filling hole is opened on one side of the base, and the oil filling hole is communicated with the base connecting hole.

[0008] Furthermore, the side cover includes an integrally formed snap-fitting portion and a buckling portion, the snap-fitting portion is located on one side of the buckling portion, a side cover through hole is penetrated through the middle of the buckling portion, the buckling portion is connected to the side wall of the sealing portion by bolts, and an extension portion is axially extended on the outside of the sealing portion and fits with the side wall of the buckling portion; the snap-fitting portion is arranged inside the base connecting hole, a side cover connecting hole is provided on the snap-fitting portion, a side cover sealing groove is provided at one end of the outer diameter of the snap-fitting portion, a side cover sealing ring is embedded in the side cover sealing groove, and the side cover sealing ring is located on one side of the elastic sealing ring.

[0009] Furthermore, an inner sealing groove is provided on the outer diameter of the inner sealing ring, and an inner sealing ring is embedded in the inner sealing groove.

[0010] Furthermore, two inner guide grooves are symmetrically provided on the inner side of the outer support ring, and the positions of the two inner guide grooves correspond to those of the two guide grooves; two outer guide grooves are symmetrically provided on the outer side of the outer support ring, and both outer guide grooves are connected to the oil filling hole; a plurality of oil holes are penetrated through the middle of the outer diameter of the outer support ring, and the arc between two adjacent oil holes is 24°; the width of the notch set on the outer support ring is 2mm, and the notch is located between the two oil holes.

[0011] Furthermore, the elastic sealing ring is made of polyurethane, a placement portion is extended from the inner side of the elastic sealing ring, the placement portion is arranged between the side cover and the inner support ring, and a plurality of the support blocks are plugged into the placement portion through an insertion rod; both ends of the outer diameter of the elastic sealing ring are provided with a polymerization portion, and the polymerization portion protrudes from the side wall of the elastic sealing ring; the initial state value of the elastic sealing ring is D0:

[0012] ;

[0013] The deformation value of the elastic sealing ring when working is ω 变 :

[0014] ;

[0015] Among them, D N is the outer diameter of the test steel pipe, in mm; B is the thickness of the elastic sealing ring, in mm; P is the working pressure during oil pressure application, in Pa; k is the elongation of the elastic sealing ring made of polyurethane, and the value range of k is 25% to 50%.

[0016] Furthermore, the plurality of support blocks are all made of 45 steel, and the inner diameter of the inner support ring formed by the plurality of support blocks is the same as the outer diameter of the pipe to be tested; the total number of the plurality of support blocks is n:

[0017] ;

[0018] Among them, L 弧 is the arc length of a single support block, L 弧 The value range of L is 8mm to 12mm. The larger the diameter of the pipe to be tested, the larger the value of L 弧 The larger the value of .

[0019] A fully automatic six-station hydraulic press, comprising the above-mentioned hydraulic test head, and also comprising a pushing assembly, wherein the pushing assembly comprises a box body, one side of the box body is symmetrically provided with a group of pushing hydraulic cylinders, the output ends of a group of the pushing hydraulic cylinders are commonly connected to a moving seat, and six moving assemblies are evenly arranged on the moving seat;

[0020] Each moving assembly includes a moving hole, a low-pressure water hole, a high-pressure water hole, a water inlet hole and a support portion, wherein the moving hole is opened at the top of the moving seat; the low-pressure water hole, the high-pressure water hole and the water inlet hole are all horizontally arranged inside the moving seat, and the low-pressure water hole is located above the high-pressure water hole, and the water inlet hole is located on one side of the high-pressure water hole, and the low-pressure water hole, the high-pressure water hole and the water inlet hole are all connected through the moving hole;

[0021] The support part includes a vertical rod and a cross rod, the vertical rods are rectangular and evenly arranged at the top of the moving seat, two adjacent vertical rods are connected by a cross rod, and a plurality of cross rods jointly support a downward hydraulic cylinder, the output end of the downward hydraulic cylinder extends to the inside of the moving hole, and the output end of the downward hydraulic cylinder is connected to a plug;

[0022] There are six water pressure test heads, and the six water pressure test heads are respectively arranged at the water inlet holes of six moving components, and one end of the water inlet hole is connected to the side cover through hole on the side cover of the water pressure test head.

[0023] Furthermore, a group of movable seat guide holes are symmetrically opened on one side of the box body, a guide rod is symmetrically provided on one side of the movable seat, and one end of the guide rod is slidably connected to the movable seat guide hole, and a group of rollers are symmetrically provided on the bottom of the movable seat.

[0024] Furthermore, a guide sleeve with a T-shaped cross section is provided inside the movable hole, the guide sleeve is arranged between the downward hydraulic cylinder and the movable hole, and a guide sleeve sealing ring is provided on the inner side of the bottom of the guide sleeve.

[0025] Furthermore, one end of the low-pressure water hole is connected to a low-pressure water pipe, and one end of the high-pressure water hole is connected to a high-pressure water pipe.

[0026] The beneficial effects of the present invention are as follows: the trumpet-shaped base guide hole is used to ensure that the end of the pipe is smoothly inserted into the interior of the water pressure test head, and the end of the pipe is extended into the base connection hole along the base guide hole. When the end of the pipe is extended into the base connection hole and does not contact the side wall of the side cover buckle connection part, hydraulic oil is injected into the base connection hole through the oil injection hole, and the hydraulic oil flows into the drainage groove outside the elastic sealing ring through the oil through hole on the outer support ring. As the hydraulic oil is continuously injected into the base connection hole, more and more hydraulic oil is in the drainage groove, thereby squeezing the elastic sealing ring, so that the elastic sealing ring is The sealing ring gradually shrinks until multiple support blocks are closed to form an inner support ring, and the inner support ring tightens the side wall of the pipe, and the injection of hydraulic oil into the base connection hole is stopped. At this time, the elastic sealing ring and the inner support ring seal the side wall of the pipe and the base connection hole. At the same time, the elastic sealing ring made of polyurethane has a strong pressure bearing capacity, and the end of the pipe will not contact the elastic sealing ring and the support block when it is inserted into the base connection hole or taken out from the base connection hole, thereby avoiding damage to the elastic sealing ring and the support block due to friction and extending the service life of the elastic sealing ring;

[0027] The pressure-bearing conditions of multiple pipes are tested simultaneously by a fully automatic six-station hydraulic press. When a low-pressure water test is performed on the pipe, the downward pressure hydraulic cylinder is controlled to shorten and drive the plug upward, so that low-pressure water can enter the water inlet hole through the low-pressure water hole and the movable hole in turn. The low-pressure water in the water inlet hole enters the interior of the pipe to be tested through the through hole of the side cover, and the pipe is tested with low-pressure water; and when a high-pressure water test is performed on the pipe, it is only necessary to control the downward pressure hydraulic cylinder to extend and drive the plug downward, so that the plug closes one end of the low-pressure water hole, ensuring that high-pressure water will not flow out of the movable component through the low-pressure water hole. High-pressure water enters the water inlet hole through the high-pressure water hole and the movable hole in turn, and then flows into the interior of the pipe, and the pipe is tested with high-pressure water. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 It is a schematic diagram of the overall structure of the water pressure test head of the present invention;

[0030] Figure 2 It is a cross-sectional schematic diagram of the water pressure test head of the present invention;

[0031] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0032] Figure 4 It is a structural schematic diagram of the base of the present invention;

[0033] Figure 5 It is a cross-sectional schematic diagram of the sealing ring component of the present invention;

[0034] Figure 6 It is a schematic diagram of the structure of the outer support ring of the present invention;

[0035] Figure 7 It is a schematic diagram of the overall structure of the fully automatic six-station hydraulic press of the present invention;

[0036] Figure 8 It is a side view of the fully automatic six-station hydraulic press of the present invention;

[0037] Fig. 9 It is a partial structural cross-sectional view of the fully automatic six-station hydraulic press of the present invention;

[0038] Fig.10 It is a top view of the fully automatic six-station hydraulic press of the present invention. DETAILED DESCRIPTION

[0039] 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.

[0040] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "one side", "one end", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in addition, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] When conducting a water pressure test on a pipe, a U-shaped sealing ring arranged inside the pipe is usually relied on to prevent water from flowing out of the pipe. However, when the pipe is inserted into the water pressure test head, the friction between the pipe and the U-shaped sealing ring will cause the U-shaped sealing ring to wear. When conducting a water pressure test on a pipe, the force on the pipe and the relative movement between the U-shaped sealing ring will easily cause wear to the U-shaped sealing ring, resulting in inaccurate test results of the water pressure test. At the same time, as the water pressure inside the pipe continues to increase, the pressure on the U-shaped sealing ring also gradually increases. The rubber U-shaped sealing ring has a weak pressure bearing capacity. When the water pressure is high, the U-shaped sealing ring will be damaged, causing water to flow out of the gap between the pipe and the water pressure test head, thereby resulting in inaccurate test results of the water pressure test.

[0042] like Figure 1-6 As shown, the water pressure test head 1 is arranged at the end of the pipe to be tested, including a base 2 and a side cover 3, the side cover 3 is connected to the side wall of the base 2, a side cover through hole 303 is penetrated in the middle of one side of the side cover 3, the base 2 includes an integrally formed guide part 201 and a sealing part 202, the guide part 201 is arranged on one side of the sealing part 202, a base guide hole 203 is opened in the middle of the guide part 201, the base guide hole 203 is trumpet-shaped, and the small-diameter end of the base guide hole 203 is close to the sealing part 202; a base connecting hole 204 is opened in the middle of the sealing part 202, and the base connecting hole 204 is connected to the base guide hole 203, the center of the base connecting hole 204 corresponds to the center of the side cover through hole 303, and a sealing component is embedded in the base connecting hole 204;

[0043] The sealing assembly includes an inner sealing ring 205 and a sealing ring component. The inner sealing ring 205 is embedded in the base connection hole 204, and one side of the inner sealing ring 205 is in contact with the side wall of the guide portion 201. A sealing ring component is in contact with one side of the inner sealing ring 205. The sealing component includes an elastic sealing ring 209 and an outer support ring 206 wrapped around the outer diameter of the elastic sealing ring 209. A plurality of arc-shaped support blocks 211 are evenly arranged on the inner side of the elastic sealing ring 209. There is a gap between two adjacent support blocks 211. The plurality of support blocks 211 are closed to form a ring-shaped Inner support ring; the outer surface of the elastic sealing ring 209 is provided with two drainage grooves 210 in the circumferential direction, and the two drainage grooves 210 are symmetrically arranged on the outer diameter of the elastic sealing ring 209; the outer support ring 206 is fitted with the inner wall of the base connection hole 204, and a plurality of oil holes 207 are penetrated and opened on the outer diameter of the outer support ring 206, and the plurality of oil holes 207 are evenly distributed on the outer diameter of the outer support ring 206, and a notch 208 is axially opened on the outer diameter of the outer support ring 206; the elastic sealing ring 209, the outer support ring 206 and the inner support ring are all located between the inner sealing ring 205 and the side cover 3;

[0044] An oil filling hole 212 is formed on one side of the base 2 , and the oil filling hole 212 is communicated with the base connecting hole 204 .

[0045] Based on the above embodiment, the hydraulic test head 1 is sleeved on the end of the pipe through the base guide hole 203. The trumpet-shaped base guide hole 203 can better connect the end of the pipe with the hydraulic test head 1. The end of the pipe extends into the base connection hole 204 along the base guide hole 203. When the end of the pipe extends into the base connection hole 204 and does not contact the side wall of the side cover 2, hydraulic oil is injected into the base connection hole 204 through the oil injection hole 212. The hydraulic oil passes through the oil through hole 206 on the outer support ring 206. 7 flows into the drainage groove 210 outside the elastic sealing ring 209. With the continuous injection of hydraulic oil, the hydraulic oil in the drainage groove 210 increases, thereby squeezing the elastic sealing ring 209, causing the elastic sealing ring 209 to gradually shrink until the multiple support blocks 211 are closed to form an inner support ring, and the inner support ring tightens the side wall of the pipe, and the injection of hydraulic oil into the base connection hole 204 is stopped. At this time, the elastic sealing ring 209 and the inner support ring seal the side wall of the pipe and the base connection hole 204.

[0046] In this embodiment, the side cover 3 includes an integrally formed snap-fitting portion 301 and a buckling portion 302, the snap-fitting portion 301 is located on one side of the buckling portion 302, a side cover through hole 303 is penetrated in the middle of the buckling portion 302, the buckling portion 302 is connected to the side wall of the sealing portion 202 by bolts, and the outer axial extension of the sealing portion 202 is provided with an extension portion that fits with the side wall of the buckling portion 302; the snap-fitting portion 301 is arranged inside the base connecting hole 204, the side cover connecting hole 304 is opened on the snap-fitting portion 301, a side cover sealing groove 305 is opened at one end of the outer diameter of the snap-fitting portion 301, a side cover sealing ring 306 is embedded in the side cover sealing groove 305, and the side cover sealing ring 306 is located on one side of the elastic sealing ring 209.

[0047] Based on the above embodiment, the snap-fitting portion 302 is connected to the side wall of the sealing portion 202 of the base 2, and at the same time, the connection between the snap-fitting portion 302 and the snap-fitting portion 302 is made more stable through the extension portion of the sealing portion 202; the snap-fitting portion 301 of the side cover 3 is inserted into the base connecting hole 204, and the elastic sealing ring 209 is limited by the side wall of the snap-fitting portion 301; the side cover sealing ring 306 is located between the snap-fitting portion 301 and the base connecting hole 204, ensuring that the oil in the drainage groove 210 will not flow out from between the side wall of the snap-fitting portion 301 and the inner wall of the base connecting hole 204, thereby strengthening the sealing between the side cover 3 and the base 2.

[0048] In this embodiment, if Figure 2 , Figure 3 As shown, an inner sealing groove 213 is formed on the outer diameter of the inner sealing ring 205 , and an inner sealing ring 214 is embedded in the inner sealing groove 213 .

[0049] Based on the above embodiment, the inner sealing ring 214 is placed between the inner sealing ring 205 and the base connecting hole 204 to prevent the oil in the drainage groove 210 from flowing out from between the side wall of the inner sealing ring 205 and the inner wall of the base connecting hole 204, thereby strengthening the sealing between the inner sealing ring 205 and the base 2.

[0050] In this embodiment, if Figure 5 , Figure 6 As shown, two inner guide grooves 215 are symmetrically provided on the inner side of the outer support ring 206, and the positions of the two inner guide grooves 215 correspond to those of the two guide grooves 210; two outer guide grooves 216 are symmetrically provided on the outer side of the outer support ring 206, and both outer guide grooves 216 are connected to the oil filling hole 212; a plurality of oil holes 207 are penetrated through the middle of the outer diameter of the outer support ring 206, and the arc between two adjacent oil holes 207 is 24°; the width of the notch 208 set on the outer support ring 206 is 2 mm, and the notch 208 is located between the two oil holes 207.

[0051] Based on the above embodiment, when the hydraulic oil is injected into the base connecting hole 204 through the oil filling hole 212, the hydraulic oil gathers in the outer guide groove 216, providing an inward force to the outer support ring 206. Due to the notch 208 on the outer support ring 206, the outer support ring 206 shrinks inward under the action of the hydraulic oil.

[0052] In this embodiment, the elastic sealing ring 209 is made of polyurethane, and a placement portion 217 extends from the inner side of the elastic sealing ring 209. The placement portion 217 is arranged between the side cover 3 and the inner support ring, and a plurality of support blocks 211 are plugged into the placement portion through an insertion rod 218; both ends of the outer diameter of the elastic sealing ring 209 are provided with a polymerization portion 219, and the polymerization portion 219 protrudes from the side wall of the elastic sealing ring 209; the initial state value of the elastic sealing ring 209 is D0:

[0053] ;

[0054] The deformation value of the elastic sealing ring 209 when working is ω 变 :

[0055] ;

[0056] Among them, D N is the outer diameter of the test steel pipe, in mm; B is the thickness of the elastic sealing ring, in mm; P is the working pressure during oil pressure application, in Pa; k is the elongation of the elastic sealing ring made of polyurethane, and the value range of k is 25% to 50%.

[0057] Based on the above embodiment, the elastic sealing ring 209 made of polyurethane has a strong pressure bearing capacity, and the end of the pipe will not come into contact with the elastic sealing ring 209 and the support block 211 when it is inserted into the base connection hole 204 or taken out from the base connection hole 204, thereby avoiding the elastic sealing ring 209 and the support block 211 from being damaged due to friction, thereby extending the service life of the elastic sealing ring 209; each support block 211 is plugged together with the elastic sealing ring 209 through the insertion rod 218, ensuring that the elastic sealing ring 209 can drive all the support blocks 211 to contract or expand; when hydraulic oil flows into the drainage groove 210 of the elastic sealing ring 209, the polymerized parts 219 at both ends of the elastic sealing ring 209 prevent the hydraulic oil from flowing out of the drainage groove 210; at the same time, the initial state value D0 of the elastic sealing ring 209 and the deformation value ω 变 The size of the elastic sealing ring 209 after shrinkage is obtained, and a suitable elastic sealing ring 209 is selected according to the diameter of the pipe to ensure that the elastic sealing ring 209 after shrinkage fits the outer wall of the pipe.

[0058] In this embodiment, the plurality of support blocks 211 are all made of 45 steel, and the inner diameter of the inner support ring formed by the plurality of support blocks 211 is the same as the outer diameter of the pipe to be tested; the total number of the plurality of support blocks is n:

[0059] ;

[0060] Among them, L 弧 is the arc length of a single support block, L 弧 The value range of L is 8mm to 12mm. The larger the diameter of the pipe to be tested, the larger the value of L 弧 The larger the value of .

[0061] Based on the above embodiment, multiple support blocks 211 are aggregated to form an inner support that can be tightly clamped on the outer wall of the pipe to limit the elastic sealing ring 209, thereby preventing the elastic sealing ring 209 from continuously shrinking and causing damage to the pipe.

[0062] like Figure 7-10 As shown, the fully automatic six-station hydraulic press includes the above-mentioned hydraulic test head 1, and also includes a pushing component 4, the pushing component 4 includes a box body 401, one side of the box body 401 is symmetrically provided with a group of pushing hydraulic cylinders 402, the output ends of the group of pushing hydraulic cylinders 402 are commonly connected to a moving seat 403, and six moving components 5 are evenly arranged on the moving seat 403;

[0063] Each moving component 5 includes a moving hole 501, a low-pressure water hole 502, a high-pressure water hole 503, a water inlet hole 504 and a supporting portion 505. The moving hole 501 is opened at the top of the moving seat 403; the low-pressure water hole 502, the high-pressure water hole 503 and the water inlet hole 504 are all horizontally arranged inside the moving seat 403, and the low-pressure water hole 502 is located above the high-pressure water hole 503, and the water inlet hole 504 is located on one side of the high-pressure water hole 503, and the low-pressure water hole 502, the high-pressure water hole 503 and the water inlet hole 504 are all connected through the moving hole 501;

[0064] The support part 505 includes a vertical rod 506 and a horizontal rod 507. The vertical rod 506 is rectangular and evenly arranged at the top of the movable seat 403. Two adjacent vertical rods 506 are connected by a horizontal rod 507. A plurality of horizontal rods 507 jointly support a downward hydraulic cylinder 508. The output end of the downward hydraulic cylinder 508 extends to the inside of the movable hole 501. The output end of the downward hydraulic cylinder 508 is connected to a plug 509.

[0065] There are six hydraulic pressure test heads 1 , and the six hydraulic pressure test heads 1 are respectively arranged at the water inlet holes 504 of the six moving components 5 , and one end of the water inlet hole 504 is connected to the side cover through hole 303 on the side cover 3 of the hydraulic pressure test head 1 .

[0066] Based on the above embodiment, when a low-pressure water test is performed on the pipe, the downward pressure hydraulic cylinder 508 is controlled to shorten and drive the plug 509 to move upward, so that the low-pressure water can enter the water inlet hole 504 through the low-pressure water hole 502 and the movable hole 501 in turn, and the low-pressure water in the water inlet hole 504 enters the water pressure test head 1 through the side cover through hole 303, and then flows into the interior of the pipe to perform a low-pressure water test on the pipe; when a high-pressure water test is performed on the pipe, the downward pressure hydraulic cylinder 508 is controlled to extend and drive the plug 509 to move downward, so that the plug 509 closes one end of the low-pressure water hole 502, so that the high-pressure water can enter the water inlet hole 504 through the high-pressure water hole 503 and the movable hole 501 in turn, and at the same time, the plug 509 ensures that the high-pressure water will not flow out of the movable component 5 through the low-pressure water hole 502, and the high-pressure water in the water inlet hole 504 enters the water pressure test head 1 through the side cover through hole 303, and then flows into the interior of the pipe to perform a high-pressure water test on the pipe.

[0067] In this embodiment, a group of movable seat guide holes 404 are symmetrically opened on one side of the box body 401, a guide rod 405 is symmetrically provided on one side of the movable seat 403, and one end of the guide rod 405 is slidably connected to the movable seat guide hole 404, and a group of rollers 406 are symmetrically provided at the bottom of the movable seat 403.

[0068] Based on the above embodiment, while the movable seat 403 is moved horizontally by extending or shortening the hydraulic cylinder 402 , the movable seat 403 is guided by the guide rod 405 and the movable seat guide hole 404 , and the movable seat 403 is conveniently moved horizontally by the roller 406 .

[0069] In this embodiment, a guide sleeve 510 with a T-shaped cross section is provided inside the moving hole 501 . The guide sleeve 510 is provided between the downward hydraulic cylinder 508 and the moving hole 501 . A guide sleeve sealing ring is provided on the inner side of the bottom of the guide sleeve 510 .

[0070] Based on the above embodiment, the guide sleeve 510 is used to prevent the plug 509 from directly rubbing against the inner wall of the movable hole 501, thereby avoiding a gap between the plug 509 and the movable hole 501 due to friction and causing water to flow out of the movable hole 501; at the same time, the guide sleeve sealing ring is used to further enhance the sealing effect between the guide sleeve 510 and the plug 509.

[0071] In this embodiment, one end of the low-pressure water hole 502 is connected to a low-pressure water pipe 511 , and one end of the high-pressure water hole 503 is connected to a high-pressure water pipe 512 .

[0072] Based on the above embodiment, the low-pressure water pipe 511 and the high-pressure water pipe 512 are connected to an external water source to provide low-pressure water and high-pressure water respectively.

[0073] The working principle of the present invention is as follows: the side covers 3 of the six hydraulic pressure test heads 1 are mounted on the side walls of the moving seat 403 by bolts, and the side cover through holes 303 of the six hydraulic pressure test heads 1 are respectively connected with the six water inlet holes 504 on the side walls of the moving seat 403, and a pipe to be tested is inserted into the interior of each hydraulic pressure test head 1, and both ends of the pipe to be tested are provided with a fully automatic six-station pressure applicator; before the hydraulic pressure test is conducted, the hydraulic cylinder 402 is extended and pushed to make the moving seat 403 move horizontally, and when the moving seat 403 moves, it is guided by the guide rod 405 and the guide hole 404 of the moving seat, and at the same time, the roller 406 at the bottom of the moving seat 403 facilitates its horizontal movement;

[0074] The hydraulic cylinder 402 is pushed to continuously extend and push the movable seat 403 until the bases 2 of the six water pressure test heads 1 are respectively sleeved on the ends of the six pipes. In this process, the pipe passes through the trumpet-shaped base guide hole 203 and enters the base connection hole 204. When the outer wall of the pipe passes through the inner sealing ring 205, the support block 211, the elastic sealing ring 209, and the side cover connection hole 304 in sequence and does not contact the buckle 302 of the side cover 3, the hydraulic cylinder 402 is stopped from extending and pushing, thereby stopping the movable seat 403 from moving; hydraulic oil is injected into the base connection hole 204 through the oil filling hole 212, and the hydraulic oil passes through the oil through hole 20 on the outer support ring 206. 7 flows into the drainage groove 210 outside the elastic sealing ring 209. As the hydraulic oil is continuously injected into the base connection hole 204, more and more hydraulic oil flows into the outer guide groove 216 and the drainage groove 210, thereby squeezing the outer support ring 206 and the elastic sealing ring 209, so that the outer support ring 206 and the elastic sealing ring 209 gradually shrink until the outer support ring 206 is completely closed. At this time, multiple support blocks 211 are closed to form an inner support ring, and the inner support ring tightens the side wall of the pipe, and the injection of hydraulic oil into the base connection hole 204 is stopped. At this time, the elastic sealing ring 209 and the inner support ring seal the side wall of the pipe and the base connection hole 204;

[0075] When a low-pressure water pressure test is performed on the pipe, the downward pressure hydraulic cylinder 508 is controlled to shorten and drive the plug 509 to move upward, so that low-pressure water can enter the water inlet hole 504 through the low-pressure water hole 502 and the movable hole 501 in turn, and the low-pressure water in the water inlet hole 504 enters the water pressure test head 1 through the side cover through hole 303, and then flows into the interior of the pipe to perform a low-pressure water test on the pipe; when a high-pressure water test is performed on the pipe, the downward pressure hydraulic cylinder 508 is controlled to extend and drive the plug 509 to move downward, so that the plug 509 closes one end of the low-pressure water hole 502, so that high-pressure water can enter the water inlet hole 504 through the high-pressure water hole 503 and the movable hole 501 in turn, and at the same time, the plug 509 ensures that the high-pressure water will not flow out of the movable component 5 through the low-pressure water hole 502, and the high-pressure water in the water inlet hole 504 enters the water pressure test head 1 through the side cover through hole 303, and then flows into the interior of the pipe to perform a high-pressure water test on the pipe;

[0076] When the water pressure test is completed, the hydraulic oil in the drainage groove 210 and the outer guide groove 216 is extracted through the oil filling hole 212 and the oil through hole 207, and the outer support ring 206 gradually expands under the action of the notch 208. At the same time, the elastic sealing ring 209 gradually expands under the action of its own elasticity, and drives the multiple support blocks 211 to separate from each other, contacting the restriction on the pipe; shortening and pushing the hydraulic cylinder 402 to make the movable seat 403 move horizontally, and the movable seat 403 drives the multiple water pressure test heads 1 connected thereto to move, thereby separating the water pressure test head 1 from the end of the pipe.

[0077] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The water pressure test head is arranged at the end of the pipe to be tested, and comprises a base and a side cover, wherein the side cover is connected to the side wall of the base. It is characterized in that A side cover through hole is penetrated in the middle of the side cover, the base includes an integrally formed guide portion and a sealing portion, the guide portion is arranged on one side of the sealing portion, a base guide hole is opened in the middle of the guide portion, the base guide hole is trumpet-shaped, and the small-diameter end of the base guide hole is close to the sealing portion; a base connecting hole is opened in the middle of the sealing portion, and the base connecting hole is connected to the base guide hole, the center of the base connecting hole corresponds to the center of the side cover through hole, an oil injection hole is opened on one side of the base, the oil injection hole is connected to the base connecting hole, and a sealing component is embedded in the base connecting hole; The sealing assembly comprises an inner sealing ring and a sealing ring component, wherein the inner sealing ring is embedded in the interior of the base connecting hole, and one side of the inner sealing ring is in contact with the side wall of the guide part; a sealing ring component is in contact with one side of the inner sealing ring, and the sealing ring component comprises an elastic sealing ring and an outer support ring covered on the outer diameter of the elastic sealing ring, a plurality of arc-shaped support blocks are evenly arranged on the inner side of the elastic sealing ring, and there is a gap between two adjacent support blocks, and the plurality of support blocks are closed to form a ring-shaped inner support ring; two drainage grooves are circumferentially arranged on the outer surface of the elastic sealing ring, and the two drainage grooves are symmetrically arranged on the outer diameter of the elastic sealing ring; the side wall of the outer support ring is in contact with the inner wall of the base connecting hole, and a plurality of oil holes are penetrated on the outer diameter of the outer support ring, and the plurality of oil holes are evenly distributed on the outer diameter of the outer support ring, and a notch is axially arranged on the outer diameter of the outer support ring; the elastic sealing ring, the outer support ring and the inner support ring are all located between the inner sealing ring and the side cover; Two inner guide grooves are symmetrically arranged on the inner side of the outer support ring, and the positions of the two inner guide grooves correspond to the positions of the two drainage grooves; two outer guide grooves are symmetrically arranged on the outer side of the outer support ring, and the two outer guide grooves are connected to the oil filling hole; a plurality of oil holes are penetrated in the middle of the outer diameter of the outer support ring, and the arc between two adjacent oil holes is 24°; the width of the notch set on the outer support ring is 2mm, and the notch is located between the two oil holes; The elastic sealing ring is made of polyurethane, and a placement portion is extended from the inner side of the elastic sealing ring, and the placement portion is arranged between the side cover and the inner support ring, and a plurality of the support blocks are plugged into the placement portion through an insertion rod; both ends of the outer diameter of the elastic sealing ring are provided with a polymerization portion, and the polymerization portion protrudes from the side wall of the elastic sealing ring; the initial state value of the elastic sealing ring is D 0 : ； The deformation value of the elastic sealing ring when working is ω 变 : ； Among them, D N is the outer diameter of the test steel pipe, in mm; B is the thickness of the elastic sealing ring, in mm; P is the working pressure when the oil pressure is applied, in Pa; k is the elongation of the elastic sealing ring made of polyurethane, and the value range of k is 25% to 50%; the initial state value D of the elastic sealing ring is 0 and deformation value ω 变 The size of the elastic sealing ring after shrinkage is obtained, and a suitable elastic sealing ring is selected according to the diameter of the pipe to ensure that the elastic sealing ring after shrinkage fits the outer wall of the pipe.

2. The water pressure test head according to claim 1, It is characterized in that The side cover includes an integrally formed clamping portion and a buckling portion, the clamping portion is located on one side of the buckling portion, a side cover through hole is penetrated in the middle of the buckling portion, the buckling portion is connected to the side wall of the sealing portion by bolts, and an extension portion is axially extended on the outside of the sealing portion to fit with the side wall of the buckling portion; the clamping portion is arranged inside the base connecting hole, a side cover connecting hole is opened on the clamping portion, a side cover sealing groove is opened at one end of the outer diameter of the clamping portion, a side cover sealing ring is embedded in the side cover sealing groove, and the side cover sealing ring is located on one side of the elastic sealing ring.

3. The water pressure test head according to claim 2, It is characterized in that An inner sealing groove is provided on the outer diameter of the inner sealing ring, and an inner sealing ring is embedded in the inner sealing groove.

4. The water pressure test head according to claim 3, It is characterized in that The multiple support blocks are all made of 45 steel. The inner diameter of the inner support ring formed by the multiple support blocks is the same as the outer diameter of the pipe to be tested; the total number of the multiple support blocks is n: ； Among them, L 弧 is the arc length of a single support block, L 弧 The value range of L is 8mm to 12mm. The larger the diameter of the pipe to be tested, the larger the value of L 弧 The larger the value of .

5. Fully automatic six-station hydraulic press, It is characterized in that The hydraulic test head according to any one of claims 1 to 4 above further comprises a pushing assembly, wherein the pushing assembly comprises a box body, a group of pushing hydraulic cylinders are symmetrically arranged on one side of the box body, the output ends of the group of pushing hydraulic cylinders are commonly connected to a moving seat, and six moving assemblies are evenly arranged on the moving seat; Each moving assembly includes a moving hole, a low-pressure water hole, a high-pressure water hole, a water inlet hole and a support portion, wherein the moving hole is opened at the top of the moving seat; the low-pressure water hole, the high-pressure water hole and the water inlet hole are all horizontally arranged inside the moving seat, and the low-pressure water hole is located above the high-pressure water hole, and the water inlet hole is located on one side of the high-pressure water hole, and the low-pressure water hole, the high-pressure water hole and the water inlet hole are all connected through the moving hole; The support part includes a vertical rod and a cross rod, the vertical rods are rectangular and evenly arranged at the top of the moving seat, two adjacent vertical rods are connected by a cross rod, and a plurality of cross rods jointly support a downward hydraulic cylinder, the output end of the downward hydraulic cylinder extends to the inside of the moving hole, and the output end of the downward hydraulic cylinder is connected to a plug; There are six water pressure test heads, and the six water pressure test heads are respectively arranged at the water inlet holes of six moving components, and one end of the water inlet hole is connected to the side cover through hole on the side cover of the water pressure test head.

6. The fully automatic six-station hydraulic press according to claim 5, It is characterized in that A group of movable seat guide holes are symmetrically opened on one side of the box body, a guide rod is symmetrically arranged on one side of the movable seat, and one end of the guide rod is slidably connected to the movable seat guide hole, and a group of rollers are symmetrically arranged at the bottom of the movable seat.

7. The fully automatic six-station hydraulic press according to claim 6, It is characterized in that A guide sleeve with a T-shaped cross section is arranged inside the moving hole, the guide sleeve is arranged between the downward hydraulic cylinder and the moving hole, and a guide sleeve sealing ring is arranged on the inner side of the bottom of the guide sleeve.

8. The fully automatic six-station hydraulic press according to claim 7, It is characterized in that One end of the low-pressure water hole is connected to a low-pressure water pipe, and one end of the high-pressure water hole is connected to a high-pressure water pipe.

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