A comprehensive test device for sealing and pushing of large-diameter ductile iron pipe joints

Abstract

The present invention provides a large-diameter ductile iron pipe interface sealing and jacking comprehensive test device, including a test pipe section, the test pipe section is located in a rectangular foundation pit, and a jacking hydraulic cylinder is fixed on the side wall of one end of the foundation pit, and the jacking hydraulic cylinder pushes the sealing pipe fitting to seal the test pipe section. The present invention adopts a convenient installation of the type test interface, adds a hydraulic press link, can be installed at one time, and meets two test requirements; in detail, a spherical structure + a top screw adjustment structure is adopted, and the anti-pull-out test of the self-anchor interface adopts a two-point downward pressure method with the pipe axis deflected upward in the vertical plane; when adding a self-anchor interface test, an intermediate support + two-side downward pressure test method is adopted, which can effectively reduce the force on the downward pressure cylinder, prevent the angle of the test pipe section from changing, and improve the success rate of the test.

Description

Technical Field

[0001] The invention belongs to the field of mechanical equipment, and specifically relates to a large-diameter ductile iron pipe interface sealing and jacking comprehensive testing device. Background Art

[0002] With the continuous development of new interfaces for ductile iron pipes, new requirements have been put forward for the supporting type test devices. For example, the self-anchored jacking pipe products mentioned in the document "Socket-type metal jacking pipe with self-anchoring interface" CN201710180592.3, in addition to the conventional interface sealing test, also need to carry out anti-pull-out and jacking type tests. The existing technology can no longer meet this requirement, as shown in the document "A comprehensive test device for pipe body interface sealing and hydraulic circulation" CN201310203270.8.

[0003] The existing large-diameter test device uses a manual chain-falling method to install the ductile iron pipe test interface, which has high labor intensity and low efficiency. In addition, multiple tests are combined, which brings great trouble to the installation and testing.

[0004] The pull-out resistance test of the self-anchored joint generally adopts a one-point downward pressure method in which the pipe axis is deflected downward in the vertical plane. In this method, the downward pressure point is subjected to large force and is prone to failure, resulting in test failure. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art. By adding a hydraulic press link during the test, a large-diameter ductile iron pipe interface sealing and jacking comprehensive test device can be installed at one time and meet the two test requirements of the self-anchor interface in the non-deflected state and the deflected state.

[0006] The technical solution adopted by the present invention is: a large-diameter ductile iron pipe interface sealing and jacking comprehensive test device, including a test pipe section, the test pipe section is located in a rectangular foundation pit, a jacking hydraulic cylinder is fixed on the side wall at one end of the foundation pit, and the jacking hydraulic cylinder pushes the sealing pipe fitting to seal the test pipe section.

[0007] Furthermore, the sealing pipe fitting comprises a socket sealing pipe fitting and a spigot sealing pipe fitting, the socket sealing pipe fitting is sealingly connected to the socket of the test pipe section, and the spigot sealing pipe fitting is sealingly connected to the spigot of the test pipe section.

[0008] Furthermore, the socket sealing pipe fitting includes a fixed ball seat, a socket movable ball seat and a cast pipe plug, the bottom surface of the fixed ball seat is fixed on the side wall of the foundation pit, the spherical surface of the fixed ball seat fits with the concave surface of the movable ball seat, one end of the cast pipe plug fits with the bottom surface of the socket movable ball seat, and the other end is plugged into the socket of the test pipe section.

[0009] Furthermore, the socket sealing pipe fitting includes a cast pipe plug, a hydraulic press bearing plug, a hydraulic press plug, a socket movable ball seat and a cylinder fixed ball seat. The cast pipe plug is plugged into the socket of the test pipe section, the vertical surface of the hydraulic press bearing plug is fitted with the cast pipe plug, the hydraulic press plug is plugged with the convex surface of the hydraulic press bearing plug, the bottom surface of the hydraulic press plug is fitted with the bottom surface of the socket movable ball seat, and the concave surface of the socket movable ball seat is matched with the convex surface of the cylinder fixed ball seat.

[0010] Furthermore, a top column is provided at the center of the oil cylinder fixed ball seat, a concave hole is provided at the connection between the top column and the bottom surface, and the top end of the piston rod of the push hydraulic cylinder is located in the concave hole.

[0011] Furthermore, a U-shaped stopper is engaged at the telescopic end of the push hydraulic cylinder to stabilize the piston rod; a fixed base is provided at the bottom of the connection between the hydraulic press bearing plug and the hydraulic press plug to support the hydraulic press bearing plug and the hydraulic press plug.

[0012] Furthermore, the test pipe section includes at least two ductile iron pipes, wherein the socket of one of the ductile iron pipes is plugged into the socket of the other ductile iron pipe, and a type test rubber ring is provided at the plug-in place of the ductile iron pipes; adjustment bases are provided at both ends of the test pipe section and at the bottom of the plug-in place of the ductile iron pipes.

[0013] Furthermore, claws are fixed at both upper and lower ends of the bottom surface of the cast pipe support plug and the upper and lower ends of the bottom surface of the hydraulic press plug; a sealing rubber ring A is provided at the connection between the cast pipe support plug and the test pipe section socket, and a sealing rubber ring B is provided at the connection between the hydraulic press support plug and the hydraulic press plug.

[0014] Furthermore, a pressing device is provided above the test pipe section, and the pressing device includes a bracket, a pressing cylinder and a pressing arc plate. Both ends of the bracket are fixed on the side walls of the foundation pit, the pressing cylinder is vertically fixed on the bracket above the test pipe section, and the pressing arc plate is fixed to the end of the piston rod of the pressing cylinder.

[0015] Furthermore, the adjustment base includes an adjustment device, an adjustment block and a mounting base, the adjustment devices are two symmetrical ones, the mounting base is fixed to the upper surface of the adjustment block, the adjustment device includes a top screw mounting seat, a top screw, an inclined sliding block and a pressure plate, the top screw mounting base and the pressure plate are respectively fixed on the mounting base, the bottom of the inclined sliding block is slidably connected to the pressure plate, one end of the top screw is fixedly connected to the side wall of the inclined sliding block, and the other end is fixed on the top screw mounting seat.

[0016] The beneficial effects obtained by the present invention are as follows: the present invention adopts an installation method that is convenient for type test interfaces, adds a hydraulic press link, can be installed at one time, and meets two test requirements; in detail, a spherical structure + top screw adjustment structure is adopted, and the anti-pullout test of the self-anchor interface adopts a two-point downward pressure method with the pipe axis deflected upward in the vertical plane; when adding a self-anchor interface test, an intermediate support + two-side downward pressure test method is adopted, which can effectively reduce the force of the downward pressure cylinder, prevent the angle of the test pipe section from changing, and improve the success rate of the test. The present invention is easier to install, has high test accuracy, and is conducive to reducing labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the top view structure of the present invention;

[0019] Figure 3 It is a left-side structural schematic diagram of the present invention;

[0020] Figure 4 This is a schematic diagram of the self-anchor interface deflection sealing test of the present invention;

[0021] Figure 5 This is a schematic diagram of adjusting the base structure of the present invention;

[0022] Among them, 1 represents a fixed ball seat, 2 represents a socket movable ball seat, 3 represents a stopper, 4 represents a cast pipe bearing plug, 5 represents a sealing rubber ring A, 6 represents a foundation pit, 7 represents a downward pressure cylinder, 8 represents a bracket, 9 represents a type test rubber ring, 10 represents a test pipe section, 11 represents an adjustment base, 12 represents a cast pipe plug, 13 represents a hydraulic press bearing plug, 14 represents a sealing rubber ring B, 15 represents a fixed base, 16 represents a hydraulic press plug, 17 represents a cylinder fixed ball seat, 18 represents a U-shaped block, 19 represents a push hydraulic cylinder, 20 represents a socket movable ball seat, 21 represents a downward pressure arc plate, 111 represents a top screw mounting seat, 112 represents a top screw, 113 represents an inclined sliding block, 114 represents a pressure plate, 115 represents a mounting base, and 116 represents an adjustment block. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] like Figure 1-4As shown, a large-diameter ductile iron pipe interface sealing and jacking comprehensive test device is characterized in that it includes a test pipe section 10, the test pipe section 10 is located in a rectangular foundation pit 6, and a jacking hydraulic cylinder 19 is fixed on the side wall of one end of the foundation pit 6, and the jacking hydraulic cylinder 19 pushes the sealing pipe fittings to seal the test pipe section 10. The sealing pipe fittings include a socket sealing pipe fitting and a spigot sealing pipe fitting, the socket sealing pipe fitting is sealed and connected to the socket of the test pipe section, and the spigot sealing pipe fitting is sealed and connected to the spigot of the test pipe section. The socket sealing pipe fittings include a fixed ball seat 1, a socket movable ball seat 2 and a cast pipe plug 4, the bottom surface of the fixed ball seat 1 is fixed on the side wall of the foundation pit 6, the spherical surface of the fixed ball seat 1 is matched with the concave surface of the socket movable ball seat 2, one end of the cast pipe plug 4 is in contact with the bottom surface of the socket movable ball seat 2, and the other end is plugged into the socket of the test pipe section. The spigot sealing pipe fittings include a cast pipe plug 12, a hydraulic press plug 13, a hydraulic press plug 16, a spigot movable ball seat 20 and a cylinder fixed ball seat 17. The cast pipe plug 12 is plugged into the test pipe section spigot, the vertical surface of the hydraulic press plug 13 fits with the cast pipe plug 12, the hydraulic press plug 16 is plugged with the convex surface of the hydraulic press plug 13, the bottom surface of the hydraulic press plug 16 fits with the bottom surface of the spigot movable ball seat 20, and the concave surface of the spigot movable ball seat 20 fits with the convex surface of the cylinder fixed ball seat 17. A top column is provided at the center of the cylinder fixed ball seat 17, and a concave hole is provided at the connection between the top column and the bottom surface, and the top end of the piston rod of the push hydraulic cylinder 19 is located in the concave hole; the hydraulic press plug 13 and the hydraulic press plug 16 are both provided with reinforcing ribs inside. The telescopic end of the push hydraulic cylinder 19 is engaged with a U-shaped stopper 18, which stabilizes the piston rod; the bottom of the connection between the hydraulic press bearing plug 13 and the hydraulic press plug 16 is provided with a fixed base 15 for supporting the hydraulic press bearing plug 13 and the hydraulic press plug 16. The test pipe section 10 includes at least two ductile iron pipes, one of which has a socket inserted into the socket of another ductile iron pipe, and a type test rubber ring 9 is provided at the plug-in place of the ductile iron pipe; an adjustment base 11 is provided at both ends of the test pipe section 10 and at the bottom of the plug-in place of the ductile iron pipe. The upper and lower ends of the bottom surface of the cast pipe bearing plug 4 and the upper and lower ends of the bottom surface of the hydraulic press plug 16 are fixed with stop claws 3; the cast pipe bearing plug 4 and the test pipe section socket connection are provided with a sealing rubber ring A5, and the hydraulic press bearing plug 13 and the hydraulic press plug 16 are connected with a sealing rubber ring B14. A pressing device is provided above the test pipe section 10, and the pressing device includes a bracket 8, a pressing cylinder 7 and a pressing arc plate 21. Both ends of the bracket 8 are fixed on the side walls of the foundation pit 6, the pressing cylinder 7 is vertically fixed on the bracket 8 above the test pipe section 10, and the pressing arc plate 21 is fixed to the end of the piston rod of the pressing cylinder 7.

[0025] like Figure 5As shown, the adjustment base 11 includes an adjustment device, an adjustment block 116 and a mounting base 115. The adjustment devices are two symmetrical ones. The mounting base 115 is fixed to the upper surface of the adjustment block 116. The adjustment device includes a top screw mounting seat 111, a top screw 112, an inclined sliding block 113 and a pressing plate 114. The top screw mounting base 111 and the pressing plate 114 are respectively fixed on the mounting base 115. The bottom of the inclined sliding block 113 is slidably connected to the pressing plate 114. One end of the top screw 112 is fixedly connected to the side wall of the inclined sliding block 113, and the other end is fixed on the top screw mounting seat 111.

[0026] During the specific implementation: first, place the adjustment base 11, the test pipe section 10, the cast pipe plug 4 and the spigot sealing pipe fittings into the rectangular foundation pit 6, and place the spigot sealing pipe fittings on the fixing seat 15; use a U-shaped stopper 18 between the push hydraulic cylinder 19 and the cast pipe plug 12 to stabilize the piston rod; the push hydraulic cylinder 19 pushes the recessed hole at the connection between the center top column and the bottom surface of the cylinder fixed ball seat 17, and pushes the spigot sealing pipe fittings, the test pipe section 10, etc. in turn to realize the installation of the entire test device.

[0027] When conducting the interface sealing type test, water is filled into the test pipe section 10 and the pressure is increased; when conducting the jacking test, water is filled into the hydraulic press bearing plug and the hydraulic press plug and the pressure is increased to form the jacking force of the test. Figure 4 As shown, the position of the inclined slider 113 is adjusted by screwing the top screw 112 to achieve the deflection of the pipeline interface. Increasing or decreasing the height of the adjustment block 116 can meet the requirements of type tests of test pipe sections 10 of different specifications.

Claims

1. A large-diameter ball mill cast pipe joint sealing and jacking comprehensive test device, comprising a test pipe section (10), characterized in that: The test pipe section (10) is located in a rectangular foundation pit (6), and a push hydraulic cylinder (19) is fixed on a side wall at one end of the foundation pit (6). The push hydraulic cylinder (19) pushes the sealing pipe to seal the test pipe section (10); The sealing pipe fittings include a socket sealing pipe fitting and a spigot sealing pipe fitting, wherein the socket sealing pipe fitting is sealed and connected to the socket of the test pipe section, and the spigot sealing pipe fitting is sealed and connected to the spigot of the test pipe section; The test pipe section (10) comprises at least two ductile iron pipes, wherein the socket of one of the ductile iron pipes is plugged into the socket of the other ductile iron pipe, and a type test rubber ring (9) is provided at the plug-in location of the ductile iron pipes; adjustment bases (11) are provided at both ends of the test pipe section (10) and at the bottom of the plug-in location of the ductile iron pipes; A downward pressure device is provided above the test pipe section (10); The socket sealing pipe fitting comprises a fixed ball seat (1), a socket movable ball seat (2) and a cast pipe plug (4); the bottom surface of the fixed ball seat (1) is fixed on the side wall of the foundation pit (6); the spherical surface of the fixed ball seat (1) fits with the concave surface of the socket movable ball seat (2); one end of the cast pipe plug (4) fits with the bottom surface of the socket movable ball seat (2) and the other end is plugged into the socket of the test pipe section; The spigot sealing pipe fitting comprises a cast pipe plug (12), a hydraulic press plug (13), a hydraulic press plug (16), a spigot movable ball seat (20) and a cylinder fixed ball seat (17); the cast pipe plug (12) is plugged into the spigot of the test pipe section; the vertical surface of the hydraulic press plug (13) is in contact with the cast pipe plug (12); the hydraulic press plug (16) is plugged into the convex surface of the hydraulic press plug (13); the bottom surface of the hydraulic press plug (16) is in contact with the bottom surface of the spigot movable ball seat (20); the concave surface of the spigot movable ball seat (20) is in contact with the convex surface of the cylinder fixed ball seat (17); The telescopic end of the push hydraulic cylinder (19) is engaged with a U-shaped stopper (18) to stabilize the piston rod; a fixed base (15) is provided at the bottom of the connection between the hydraulic press bearing plug (13) and the hydraulic press plug (16) to support the hydraulic press bearing plug (13) and the hydraulic press plug (16); In the type test, a hydraulic press link is added to meet the requirements of two tests at one time. When the interface sealing type test is carried out, water is filled into the test pipe section (10) and the pressure is increased; when the push test is carried out, water is filled into the hydraulic press bearing plug (13) and the hydraulic press plug (16) and the pressure is increased to form the push force of the test.

2. According to claim 1, a large-diameter ball mill cast pipe joint sealing and jacking comprehensive test device is characterized by: A top column is provided at the center of the oil cylinder fixed ball seat (17), a concave hole is provided at the connection between the top column and the bottom surface, and the top end of the piston rod of the push hydraulic cylinder (19) is located in the concave hole; and reinforcing ribs are provided inside the hydraulic press bearing plug (13) and the hydraulic press plug (16).

3. According to claim 1, a large-diameter ball mill cast pipe joint sealing and jacking comprehensive test device is characterized by: Claws (3) are fixed to the upper and lower ends of the bottom surface of the cast pipe support plug (4) and the upper and lower ends of the bottom surface of the hydraulic press plug (16); a sealing rubber ring A (5) is provided at the connection between the cast pipe support plug (4) and the test pipe section plug, and a sealing rubber ring B (14) is provided at the connection between the hydraulic press support plug (13) and the hydraulic press plug (16).

4. According to claim 1, a large-diameter ball mill cast pipe joint sealing and jacking comprehensive test device is characterized by: The pressing device comprises a bracket (8), a pressing oil cylinder (7) and a pressing arc plate (21), wherein both ends of the bracket (8) are fixed to the side walls of the foundation pit (6), the pressing oil cylinder (7) is vertically fixed to the bracket (8) above the test pipe section (10), and the pressing arc plate (21) is fixed to the end of the piston rod of the pressing oil cylinder (7).

5. According to claim 1, a large-diameter ball mill cast pipe joint sealing and jacking comprehensive test device is characterized by: The adjustment base (11) comprises an adjustment device, an adjustment block (116) and a mounting base (115). The adjustment devices are two symmetrical ones. The mounting base (115) is fixed to the upper surface of the adjustment block (116). The adjustment device comprises a top screw mounting seat (111), a top screw (112), an inclined sliding block (113) and a pressing plate (114). The top screw mounting seat (111) and the pressing plate (114) are respectively fixed to the mounting base (115). The bottom of the inclined sliding block (113) is slidably connected to the pressing plate (114). One end of the top screw (112) is fixedly connected to the side wall of the inclined sliding block (113), and the other end is fixed to the top screw mounting seat (111).

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