A grouting valve pipe and valve skin pressure resistance performance testing system suitable for pressure grouting

Abstract

The application discloses a grouting valve pipe and valve skin pressure resistance performance testing system suitable for pressure grouting, which comprises a pressurizing device, a sealing device and a pressure measuring system; the sealing device comprises a valve cylinder and an annular and sealed testing cavity arranged on the outer circumferential surface of the valve cylinder, the testing cavity can be opened from the outside of the valve cylinder, and an outer interface is arranged on the outer wall of the testing cavity; an analog grouting hole communicating with the testing cavity is formed in the valve cylinder, a valve skin to be measured is arranged outside the analog grouting hole, the pressurizing device comprises a pressurizing pump for providing pressure for testing fluid, and the liquid outlet of the pressurizing pump is connected to the outer interface through a grouting pipeline; the pressure measuring system comprises a host computer and a digital pressure gauge arranged on the outer interface; the reverse pressure that can be borne by valve skins with different inner diameters and different skin thicknesses can be repeatedly tested, and the pressure resistance test of the valve skin is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grouting pipe valve skin pressure resistance detection. Specifically, it is a grouting valve pipe valve skin pressure resistance performance test system suitable for pressure grouting. BACKGROUND

[0002] In building construction and tunnel construction, in order to improve the reinforcement effect of the stratum, the grouting reinforcement method is usually used to reinforce the stratum. The grouting material is pumped into the grouting pipe by the grouting pump, and then flows into the stratum through the grouting hole on the grouting pipe. The grouting material combines with the soil to improve the strength of the soil. In order to prevent the grouting pipe from flowing back into the grouting pipe when the external grout pressure is too high, a rubber check valve sleeve is usually arranged at the grouting port of the grouting pipe. The rubber check valve sleeve has a check function, but when the external grout pressure of the grouting pipe is too high, the check rubber sleeve will be broken. The pressure that can be resisted by the check rubber sleeve with different diameters and thicknesses is different. However, there is no test system that can conveniently and quickly test the pressure resistance of the check rubber sleeve. SUMMARY

[0003] Therefore, the technical problem to be solved by the present application is to provide a practical grouting valve pipe valve skin pressure resistance performance test system suitable for pressure grouting.

[0004] To solve the above technical problems, the present application provides the following technical scheme:

[0005] A grouting valve pipe valve skin pressure resistance performance test system suitable for pressure grouting, comprising a pressurizing device, a sealing device and a pressure measuring system;

[0006] The sealing device comprises a valve cylinder and an annular and sealed test cavity arranged on the outer peripheral surface of the valve cylinder. The test cavity can be opened from the outside of the valve cylinder, and an external interface is arranged on the outer wall of the test cavity. An simulated grouting hole is formed in the valve cylinder and communicates with the test cavity. The valve skin to be tested is arranged outside the simulated grouting hole.

[0007] The pressurizing device comprises a pressurizing pump for providing pressure for the test fluid. The outlet of the pressurizing pump is connected to the external interface through a grouting pipeline.

[0008] The pressure measuring system comprises a host computer and a digital pressure gauge arranged on the external interface. The digital pressure gauge and the pressurizing pump are both connected to the host computer.

[0009] Further, the sealing device further comprises end plates arranged at both ends of the valve cylinder in the length direction and an outer cylinder sleeved outside the valve cylinder. The length direction of the outer cylinder is abutted against the opposite surfaces of the end plates. The annular sealing cavity formed between the inner wall of the outer cylinder, the outer wall of the valve cylinder and the two end plates is the test cavity.

[0010] Further, one of the end plates is fixedly arranged on the outer wall of the valve barrel, and the other end plate is detachably arranged on the valve barrel, or both of the end plates are detachably arranged on the valve barrel.

[0011] Further, the sealing device further comprises a plurality of tension rods for tensioning the two end plates, the tension rods are evenly arranged on the two end plates, and the length of the tension rods is provided with locking members which are arranged on the opposite sides of the two end plates.

[0012] Further, the length of the valve barrel is provided with a first positioning part, the length of the outer barrel is provided with a second positioning part, and the end plate is provided with a first receiving part corresponding to the first positioning part and a second receiving part corresponding to the second positioning part.

[0013] Further, the first receiving part and the second receiving part are both provided with a ring groove which faces the center line of the valve barrel, and the ring groove is provided with a sealing ring.

[0014] Further, the upper side of the end plate is provided with a lifting hole, and a lifting bolt is arranged in the lifting hole.

[0015] Further, the number of the outer interfaces is at least two, the slurry pipeline adopts a 1-inch high-pressure rubber pipe, the slurry pipeline and one of the outer interfaces are connected through a connector, the connector is a reducing connector, and the digital pressure gauge is connected to the other outer interface.

[0016] Further, the grouting range of the pressurizing pump is 0-25Mpa, the rotation speed of the pump body is kept constant during the pressurizing process, so that the test fluid pressure is stably increased, and the minimum pressure collection accuracy of the digital pressure gauge is 0.01MPa.

[0017] Further, the diameter of the simulated grouting hole is 6mm-12mm, a sheath mounting groove which covers the outer end of the simulated grouting hole is arranged outside the simulated grouting hole, and the groove width of the sheath mounting groove is 24mm-36mm.

[0018] In use, the test fluid is injected into the test cavity through the pressurizing pump to simulate the situation that the valve skin is subjected to external slurry pressure during stratum grouting. Generally, clean water is used as the test fluid, and when the pressure reaches a certain value, the valve skin is broken, the pressure value change from the start of the test to the breaking of the valve skin can be automatically recorded by the pressure measurement system, and the pressure value is accurate to 0.01Mpa. When the valve skin is broken, the pressure value changes sharply, and the maximum pressure value before the pressure change is the breaking pressure of the valve skin.

[0019] The technical scheme of the present application has the following beneficial technical effects:

[0020] The present application can simulate the condition of valve skin under external grout pressure during stratum grouting, monitor the pressure in the test cavity through a digital pressure gauge, realize the pressure test of the valve skin, repeatedly test the reverse pressure that can be borne by valve skins with different inner diameters and different skin thicknesses, and has the advantages of simple structure, practical function, small size of the sealing device, easy transfer, good sealing effect of the sealing device, ensured reliability of the valve skin pressure test, easy replacement of different valve skins, simple operation and practical function. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a connection diagram of an embodiment of the present application;

[0022] Figure 2 is a structure diagram of a sealing device of an embodiment of the present application;

[0023] Figure 3 is a sectional view of a sealing device of an embodiment of the present application;

[0024] Figure 4 is a top view of a sealing device of an embodiment of the present application;

[0025] Figure 5 is a right view of a sealing device of an embodiment of the present application;

[0026] Figure 6 is an assembly diagram of a rod sleeve of an embodiment of the present application.

[0027] The reference signs in the drawings are as follows: 1-locking nut, 2-flat gasket, 3-elastic gasket, 4-pull rod, 5-end plate, 6-valve cylinder, 7-first sealing ring, 8-second sealing ring, 9-valve skin, 10-joint body, 11-digital pressure gauge, 12-outer cylinder, 13-lifting ring bolt, 14-rod sleeve, 15-first interface, 16-second interface, 17-lifting hole, 18-pressurizing device, 19-sealing device, 20-main machine, 21-first positioning part, 22-second positioning part. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0029] A grouting valve pipe valve skin pressure performance test system suitable for pressure grouting, comprising a pressurizing device 18, a sealing device 19 and a pressure measuring system;

[0030] The sealing device 19 comprises a valve cylinder 6 and an annular and sealed test cavity arranged on the outer circumferential surface of the valve cylinder 6, the test cavity is openable from the outside of the valve cylinder 6, and an outer interface is arranged on the outer wall of the test cavity; an analog grouting hole communicating with the test cavity is arranged on the valve cylinder 6, and a valve skin 9 to be tested is arranged outside the analog grouting hole, and the installation and replacement of the valve skin 9 are realized through the openable test cavity;

[0031] The pressurizing device 18 comprises a pressurizing pump for providing pressure for the test fluid, the liquid outlet of the pressurizing pump is connected to the outer interface through a grouting pipeline, preferably, a constant-speed and constant-pressure grouting pump is adopted, the grouting range of the pressurizing pump is 0-25 MPa, and the rotation speed of the pump body is kept constant during the pressurizing process, so that the pressure of the test fluid is stably increased, and the actual grouting condition is simulated; the pressurizing pump can be a hand pump or an automatic pressure pump in the prior art;

[0032] The pressure measuring system comprises a host computer 20 and a digital pressure gauge 11 arranged on the outer interface, the digital pressure gauge 11 and the pressurizing pump are both in communication connection with the host computer 20, and the minimum pressure collection accuracy of the digital pressure gauge 11 is 0.01 MPa;

[0033] During the pressure resistance test of the valve skin 9, the test cavity is first opened to install the valve skin 9 on the valve cylinder 6, then the test cavity is sealed, then the pressurizing pump is used to inject test fluid, generally clean water, into the test cavity to simulate the condition that the valve skin 9 is subjected to external slurry pressure during grouting in the formation, the pressurizing pump continuously increases the pressure of the clean water, and the valve skin 9 is broken when the pressure reaches a certain degree, the digital pressure gauge 11 continuously records the pressure value change from the beginning of the injection of the clean water to the breaking of the valve skin 9, the pressure value changes sharply when the valve skin 9 is broken, and the maximum pressure value before the pressure change is the breaking pressure of the valve skin 9, the host computer 20 obtains the breaking pressure according to the sharp change of the pressure value and controls the pressurizing pump to stop working; the pressure measuring system can accurately measure the breaking pressure of the valve skin 9 to 0.01 MPa, and the test system can complete the pressure test of the valve skin 9 in the pressure range of 0.5 MPa-15 MPa;

[0034] After the test of the valve skin 9 in the test cavity is completed, the test cavity is opened, different valve skins 9 are replaced, and the test cavity is sealed again, so that the test of the breaking pressure values of other valve skins 9 can be continuously carried out, and the application can repeatedly test the reverse pressure that valve skins 9 with different inner diameters and different skin thicknesses can withstand; the tested valve skin 9 is the existing valve skin 9, such as the valve skin 9 made of black rubber material in the prior art.

[0035] Further, the sealing device 19 further comprises end plates 5 arranged at both ends of the valve cylinder 6 in the length direction and an outer cylinder 12 sleeved outside the valve cylinder 6, the length direction of the outer cylinder 12 abuts against the opposite faces of the end plates 5, and the annular sealing cavity formed between the inner wall of the outer cylinder 12, the outer wall of the valve cylinder 6 and the two end plates 5 is the test cavity; when it is needed to open the test cavity, the end plates 5 are removed and the valve cylinder 6 is taken out of the outer cylinder 12, so that the position of the simulated grouting hole on the valve cylinder 6 is exposed, and then the installation or replacement of the valve skin 9 can be carried out.

[0036] In one embodiment, as shown in the drawings, the two end plates 5 are detachably arranged on the valve cylinder 6; Figures 1 to 5

[0037] Specifically, the length of the valve cylinder 6 is provided with a first positioning part 21, and the length of the outer cylinder 12 is provided with a second positioning part 22, the first positioning part 21 is a first annular groove arranged at both ends of the valve cylinder 6, the first annular groove has a first vertical inner wall perpendicular to the axis of the valve cylinder 6, the second positioning part 22 is a second annular groove arranged at both ends of the outer cylinder 12, the second annular groove has a second vertical inner wall perpendicular to the axis of the outer cylinder 12; the end plate 5 is provided with a first corresponding part corresponding to the first positioning part 21 and a second corresponding part corresponding to the second positioning part 22; the first corresponding part is an end circular hole arranged at the center of the end plate 5, the two ends of the valve cylinder 6 are inserted into the end circular hole and the first vertical inner wall abuts against the outer edge of the end circular hole; the second corresponding part is an end ring groove arranged on the inner side face of the end plate 5, the two ends of the outer cylinder 12 are inserted into the end ring groove through the second annular groove, and the second vertical inner wall abuts against the outer edge of the end ring groove; in order to strengthen the sealing, a ring groove facing the center line of the valve cylinder 6 is arranged on the inner wall of the end ring groove and the end circular hole, a sealing ring is arranged in the ring groove, the sealing ring is made of butyl rubber, specifically, the first sealing ring 7 seals the contact surface of the valve cylinder 6 and the end plate 5, and the second sealing ring 8 seals the contact surface of the outer cylinder 12 and the end plate 5;

[0038] The sealing device 19 further comprises a plurality of pull rods 4 for tensioning the two end plates 5, the pull rods 4 are evenly arranged on the two end plates 5, which is beneficial to balance the stress of the end plates 5, the number of the pull rods 4 is 2-6, the end plate 5 is provided with a pull hole corresponding to the pull rod 4, the pull rod 4 is arranged in the pull hole, and the length of the pull rod 4 is provided with a locking piece abutting against the opposite sides of the two end plates 5; preferably, the number of the pull rods 4 is 4, the end plate 5 is a rectangular with rounded corners or chamfered corners, and the pull hole is located at the four corners of the end plate 5, the end of the pull rod 4 is provided with a threaded section, the locking piece comprises a locking nut 1 threaded on the threaded section and a flat gasket 2 and an elastic gasket 3 clamped between the locking nut 1 and the end plate 5, and the elastic gasket 3 prevents the locking nut 1 from loosening;

[0039] ​Preferably, the locking member further comprises a rod sleeve 14 arranged between the outer wall of the flat pad 2 and the end plate 5, the rod sleeve 14 is a fastening device for fastening the valve cylinder in the test cavity, the rod sleeve 14 comprises a cylindrical portion matched with the threaded section at the end of the pull rod 4, and a polygonal knob is fixedly connected to one end of the cylindrical portion close to the locking nut 1, the knob is similar to the nut, which is internally screwed with the pull rod 4 and externally shaped to facilitate screwing; the outer periphery of the cylindrical portion is smooth, and the outer diameter is smaller than the inner diameter of the pull hole, so that the cylindrical portion can rotate and slide forward and backward in the pull hole; the cylindrical portion and the knob are matched with the threaded section of the pull rod 4, which increases the contact area with the pull rod 4, facilitates the secure fixation of the pull rod 4, and at the same time, the outer periphery of the cylindrical portion is clamped in the threaded section of the pull rod 4 (the diameter of this threaded section is smaller than that of other parts of the pull rod 4), which can avoid the shaking of the pull rod 4 in the pull hole, position the pull rod 4 to the center of the pull hole, make the positions of the four pull rods 4 uniform, facilitate the uniform force exerted by the end plate 5 on the edges of the outer cylinder 12 and the valve cylinder 6, and prevent water leakage;

[0040] When it is necessary to install or replace the valve skin 9, the locking member is unscrewed to remove the end plate 5 from the pull rod 4, and then the outer cylinder 12 is removed from the outside of the valve cylinder 6, so that the position of the simulated grouting hole is exposed; the sealing device 19 of the application is convenient and fast to disassemble, facilitates the replacement of the valve skin 9, and has good sealing effect;

[0041] The installation structure of the embodiment is simply that the two end plates 5 are pressed against each other by the pull rod 4 and the locking member 1 on the pull rod 4 to form an annular test cavity; the two ends of the outer cylinder 12 and the valve cylinder 6 are nested with the end plate 5, facilitating the positioning and engagement of the end plate 5 at the two ends of the outer cylinder 12 and the valve cylinder 6.

[0042] In one embodiment, the length of the valve cylinder 6 is 400 mm, the outer diameter of the valve cylinder 6 is 127 mm ± 5 mm, the wall thickness of the valve cylinder 6 is 6 mm ± 1 mm, the inner diameter of the outer cylinder 12 is 151 mm ± 5 mm, the two ends of the valve cylinder 6 extend out of the end plate by about 515 mm, the distance between the outer sides of the two end plates 5 is about 370 mm, the length of the pull rod 4 is 410 mm ± 5 mm, the length of the threaded section of the pull rod 4 is about 110 mm, the diameter of the simulated grouting hole is 6 mm-12 mm, a sheath mounting groove covering the outer end of the simulated grouting hole is provided outside the simulated grouting hole, the groove width of the sheath mounting groove is 24 mm-36 mm, the number of simulated grouting holes is one or more, preferably the number of simulated grouting holes is two, the diameters of the simulated grouting holes are 6 mm and 12 mm respectively, and the groove widths of the corresponding sheath mounting grooves are 24 mm and 36 mm respectively; In use, the pressure resistance of the valve skin 9 on the simulated grouting hole of two sizes can be tested at the same time, the impact of fluid pressure on a plurality of valve skins 9 on a section of valve pipe is simulated, and overall pressure resistance test is performed. A plug corresponding to the diameter of the simulated grouting hole can also be used to plug a simulated grouting hole of one size, and only the valve skin 9 covered on the simulated grouting hole of one size is subjected to pressure resistance test.

[0043] In one embodiment, one of the end plates 5 is fixedly arranged on the outer wall of the valve cylinder 6, such as the left end plate 5 being sealed and fixed on the outer wall of the valve cylinder 6 by welding, and the right end plate 5 being detachably arranged on the valve cylinder 6. Only the left end plate 5 needs to be removed from the valve cylinder 6 to loosen the outer cylinder 12, and then the outer cylinder 12 is removed from the valve cylinder 6 to expose the valve skin 9 or the simulated grouting hole. Compared with two detachable end plates 5, one fixed and the other detachable end plate 5 reduces the disassembly steps of the end plate 5, and only the sealing of the detachable end plate 5 needs to be considered, which is more convenient to use.

[0044] Further, the upper side of the end plate 5 is provided with a lifting hole 17, and a lifting ring bolt 13 is installed in the lifting hole 17, which facilitates lifting the sealing device 19 for testing or placing.

[0045] Further, the number of the external interfaces is at least two, in this embodiment, three external interfaces, namely the first interface 15, the second interface 16 and the third interface, the slurry conveying pipeline adopts a 1-inch high-pressure rubber pipe, which can withstand a maximum grouting pressure of 30 MPa, the slurry conveying pipeline is connected with the first interface 15 through the joint body 10, the joint body 10 is a reducing joint matched with the high-pressure rubber pipe and the first interface 15, the digital pressure gauge 11 is connected on the second interface 16; an electrically-controlled high-pressure valve can also be connected at one end of the high-pressure rubber pipe, after the host machine 20 detects a sudden signal of the digital pressure gauge 11, the electrically-controlled high-pressure valve and the pressure pump are timely controlled to be closed, so as to prevent a large amount of clean water from flowing out in the test site, reduce the difficulty of subsequent site cleaning, and be beneficial to maintaining the site environment; the third interface can be used as a backup interface, and a mechanical pressure gauge can also be installed on the third interface, and the mechanical pressure gauge can be used alone.

[0046] Obviously, the above embodiments are only examples for clearly illustrating, but not limitation to the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the patent application claims.

Claims

1. A grouting valve pipe valve skin pressure resistance performance test system suitable for pressure grouting, characterized in that, The sealing device (19) comprises a valve cylinder (6) and an annular and sealed test cavity arranged on the outer circumferential surface of the valve cylinder (6), the test cavity is openable from the outside of the valve cylinder (6), and an outer interface is arranged on the outer wall of the test cavity; an analog grouting hole communicating with the test cavity is arranged on the valve cylinder (6), and a valve skin (9) to be tested is arranged outside the analog grouting hole, The pressurizing device (18) comprises a pressurizing pump for providing pressure for the test fluid, and the liquid outlet of the pressurizing pump is connected to the outer interface through a grouting pipeline. The pressure measuring system comprises a host computer (20) and a digital pressure gauge (11) arranged on the outer interface, and the digital pressure gauge (11) and the pressurizing pump are both in communication connection with the host computer (20). The sealing device (19) further comprises end plates (5) arranged at the lengthwise two ends of the valve cylinder (6) and an outer cylinder (12) sleeved outside the valve cylinder (6), the lengthwise two ends of the outer cylinder (12) abut against the opposite surfaces of the end plates (5), and an annular sealing cavity formed between the inner wall of the outer cylinder (12), the outer wall of the valve cylinder (6) and the two end plates (5) is the test cavity.

2. The pressure resistance performance test system for valve pipe and valve skin of grouting valve applicable to pressure grouting according to claim 1, characterized in that, One of the end plates (5) is fixedly arranged on the outer wall of the valve cylinder (6), and the other end plate (5) is detachably arranged on the valve cylinder (6), or both of the end plates (5) are detachably arranged on the valve cylinder (6).

3. The pressure resistance performance test system for valve pipe and valve skin of grouting valve applicable to pressure grouting according to claim 2, characterized in that, The sealing device (19) further comprises a plurality of pull rods (4) for tensioning the two end plates (5), the pull rods (4) are evenly arranged on the two end plates (5), and the lengthwise two ends of the pull rods (4) are provided with locking members capable of abutting against the opposite sides of the two end plates (5).

4. The pressure resistance performance testing system for valve pipe and valve skin of grouting valve applicable to pressure grouting according to claim 2 or 3, characterized in that, The lengthwise two ends of the valve cylinder (6) are provided with first positioning portions (21), the lengthwise two ends of the outer cylinder (12) are provided with second positioning portions (22), and the end plates (5) are provided with first corresponding portions corresponding to the first positioning portions (21) and second corresponding portions corresponding to the second positioning portions (22).

5. The pressure resistance performance test system for valve pipe and valve skin of grouting valve applicable to pressure grouting according to claim 2, characterized in that, The first corresponding portions and the second corresponding portions are both provided with annular grooves facing the center line of the valve cylinder (6), and sealing rings are arranged in the annular grooves.

6. The pressure resistance performance test system for valve pipe and valve skin of grouting valve applicable to pressure grouting according to claim 5, characterized in that, The upper side of the end plate (5) is provided with a lifting hole (17), and a lifting ring bolt (13) is arranged in the lifting hole (17).

7. The pressure resistance performance testing system for valve pipe and valve skin of grouting valve applicable to pressure grouting according to claim 2, characterized in that, The number of the outer interfaces is at least two, the grouting pipeline adopts a 1-inch high-pressure rubber pipe, the grouting pipeline and one of the outer interfaces are connected through a joint body (10), the joint body (10) is a reducing joint, and the digital pressure gauge (11) is connected to the other outer interface.

8. The pressure resistance performance testing system for valve pipe and valve skin of grouting valve applicable to pressure grouting according to claim 1, characterized in that, The grouting range of the pressurizing pump is 0-25 MPa, the rotation speed of the pump body is kept constant during the pressurizing process, so that the pressure of the test fluid stably rises, and the minimum pressure collection accuracy of the digital pressure gauge (11) is 0.01 MPa.

9. The pressure resistance performance testing system for valve pipe and valve skin of grouting valve applicable to pressure grouting according to claim 1, characterized in that, The diameter of the analog grouting hole is 6 mm-12 mm, an outer sleeve mounting groove covering the outer end of the analog grouting hole is arranged outside the analog grouting hole, and the groove width of the outer sleeve mounting groove is 24 mm-36 mm.

10. The pressure resistance performance testing system for valve pipe and valve skin of grouting valve applicable to pressure grouting according to claim 1, characterized in that, ​

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