A self-locking solid concrete water pressure test water stop device

Abstract

A self-locking solid concrete water pressure test water-stopping device comprises a steel tie rod inserted into a solid concrete test hole; the steel tie rod is sequentially sleeved with a lower rubber sealing circular gasket, a fan ring steel pressure plate, an upper rubber sealing circular gasket, a nut with a gasket, a reaction circular steel plate, a reaction nut, a connecting nut, and a hydraulic quick threaded joint from bottom to top; the longitudinal axes of the steel tie rod, the lower rubber sealing circular gasket, the fan ring steel pressure plate, the upper rubber sealing circular gasket, the nut with a gasket, the reaction circular steel plate, the reaction nut, the connecting nut, and the hydraulic quick threaded joint are coaxial; the reaction circular steel plate is mounted on the surface of the solid concrete and covers the lower rubber sealing circular gasket, the fan ring steel pressure plate, the upper rubber sealing circular gasket, the nut with a gasket, and part of the steel tie rod thereunder. The present invention embeds an upper rubber sealing circular gasket, a fan ring steel pressure plate and a lower rubber sealing circular gasket into a test hole, and delivers external pressurized water to the test hole through a steel pull rod, a nut with a gasket, a reaction circular steel plate, a reaction nut, a connecting nut and a hydraulic quick threaded joint, and utilizes the water pressure of the pressurized water to enhance the sealing effect, thereby achieving self-locking water-stopping, and has strong practicality and reasonable design.

Description

Technical Field

[0001] The invention relates to a self-locking solid concrete water pressure test water stopping device. Background Art

[0002] Concrete density is directly related to the quality and durability of concrete. Therefore, testing the density of solid concrete is a very important task. As a general method for testing the density of solid concrete, concrete water pressure test has been widely used.

[0003] In the prior art, the water pressure test of solid concrete mainly adopts the method proposed in JTJ 270-1998 "Testing Procedures for Concrete in Water Transport Engineering": drilling a hole perpendicular to the surface of solid concrete to form a test hole; inserting and fixing a water stopper into the test hole; installing a pressure gauge, connecting the water stopper and the water pump with a pressure hose to allow water to enter the test hole; applying water pressure according to relevant regulations, and measuring the amount of water entering the test hole, and determining the compactness of the concrete by the specified water absorption in the test hole. The shortcomings of this method: In order to ensure that the water stopper can play a water-stopping role, the thickness of the tested concrete should be ≥500mm. Concrete with a thickness of <500mm (such as some basement floors, pool side walls, tunnel linings, etc.) cannot be tested.

[0004] Since the waterstop used in the existing method has the disadvantage of being unable to detect concrete with a thickness of less than 500mm, innovative improvements are needed. Summary of the invention

[0005] The present invention proposes a self-locking solid concrete water pressure test water stop device with strong practicality and reasonable design, and also provides an operation method using the same. The device and the operation method can solve the problem that the water stop plug used in the existing solid concrete water pressure test method cannot detect concrete with a thickness of less than 500mm.

[0006] The technical solution adopted by the present invention is: a self-locking solid concrete water pressure test water-stopping device, including a steel pull rod inserted into a solid concrete test hole; the steel pull rod is sequentially sleeved with a lower rubber sealing circular gasket, a fan ring steel pressure plate, an upper rubber sealing circular gasket, a nut with a gasket, a reaction circular steel plate, a reaction nut, a connecting nut, and a hydraulic quick threaded joint from bottom to top; the longitudinal axes of the steel pull rod, the lower rubber sealing circular gasket, the fan ring steel pressure plate, the upper rubber sealing circular gasket, the nut with a gasket, the reaction circular steel plate, the reaction nut, the connecting nut, and the hydraulic quick threaded joint are coaxial; the reaction circular steel plate is mounted on the surface of the solid concrete and covers the lower rubber sealing circular gasket, the fan ring steel pressure plate, the upper rubber sealing circular gasket, the nut with a gasket, and part of the steel pull rod thereunder. The present invention embeds an upper rubber sealing circular gasket, a fan ring steel pressure plate and a lower rubber sealing circular gasket into a test hole, and delivers external pressurized water to the test hole through a steel pull rod, a nut with a gasket, a reaction circular steel plate, a reaction nut, a connecting nut and a hydraulic quick threaded joint, and utilizes the water pressure of the pressurized water to enhance the sealing effect, thereby achieving self-locking water-stopping.

[0007] Furthermore, the test hole has parallel upper and lower surfaces and a longitudinal axis perpendicular to the surface of the solid concrete, and includes a lower cylinder, a middle cylinder, and an upper cylinder; the lower cylinder has a diameter of 30 mm and a height of ≥12 mm, the lower surface is connected to the solid concrete, and the upper surface is connected to the lower surface of the middle cylinder; the middle cylinder has a diameter of (45.5-47) mm and a height of (20-30) mm, the lower surface is connected to the upper surface of the lower cylinder, and the upper surface is connected to the lower surface of the upper cylinder; the upper cylinder has a diameter of 30 mm and a height of 25 mm, the lower surface is connected to the upper surface of the middle cylinder, and the upper surface is in the same plane as the surface of the solid concrete.

[0008] Furthermore, the steel pull rod is longitudinally provided with a full-length hollow inner cavity with an inner diameter of (1-3) mm, and includes, from bottom to top, a lower annular body, a middle screw, a fixed section, and an upper screw; the outer diameter of the lower annular body is (29.0-29.5) mm, the inner diameter is equal to the inner diameter of the inner cavity, the height is (6-12) mm, and the center of the upper surface is vertically connected to the lower surface of the middle screw; the specification of the middle screw is 12 mm, and the upper surface is vertically connected to the lower surface of the fixed section; the fixed section is a regular hexagon, with a diagonal length of 12 mm, a height of (10-15) mm, and the upper surface is vertically connected to the lower surface of the upper screw; the upper screw is 12 mm in specification, and is connected to a hydraulic quick threaded joint by a connecting bolt, and external pressure water can enter the inner cavity through the hydraulic quick threaded joint to reach the test hole.

[0009] Furthermore, the lower rubber sealing circular gasket, the middle screw is sleeved on the inner ring, the outer ring diameter is 45mm, the inner ring diameter is (12.5-14)mm, the thickness is (1-4)mm, the lower surface contacts the upper surface of the lower circular ring body of the steel pull rod, and the upper surface contacts the upper surface of the fan ring steel pressure plate.

[0010] Furthermore, the fan ring steel pressure plate is formed by dividing the steel ring plate into four pieces along the longitudinal axis and then assembling them in situ. The middle screw is sleeved on the inner ring. The outer ring has a diameter of 45 mm, the inner ring diameter is equal to the inner ring diameter of the lower rubber sealing round gasket, and the thickness is (6-12) mm. The lower surface contacts the upper surface of the lower rubber sealing round gasket, and the upper surface contacts the lower surface of the upper rubber sealing round gasket.

[0011] Furthermore, the upper rubber sealing gasket, the middle screw is sleeved on the inner ring, the outer ring diameter is 45mm, the inner ring diameter is equal to the inner ring diameter of the lower rubber sealing circular gasket, the thickness is (1-4)mm, the lower surface is in contact with the upper surface of the fan ring steel pressure plate, and the upper surface is in contact with the lower end of the gasket nut, the upper surface of the cylinder in the middle of the test hole and the solid concrete cutting surface.

[0012] Furthermore, the nut with gasket is screwed on the middle screw rod, including a lower gasket and an upper nut; the lower gasket has a height of (6-10) mm, an outer diameter equal to the outer diameter of the lower circular ring of the steel pull rod, and the lower end contacts the upper surface of the upper rubber sealing gasket; the upper nut is a regular hexagon, with a height of (10-14) mm and a diagonal length of 20 mm.

[0013] Furthermore, the reaction circular steel plate has a thickness of ≥8mm and a diameter of ≥100mm, a lower surface of which contacts the solid concrete surface, an upper surface of which contacts the lower end of the reaction nut, and a reaction circular hole with a diameter of (12.5-16) mm is drilled in the center, in which the middle screw is sleeved.

[0014] Furthermore, the reaction nut is screwed onto the middle screw rod, and the lower end thereof contacts the upper surface of the reaction circular steel plate.

[0015] The beneficial effects of the present invention are as follows: (1) The steel tie rod, lower rubber sealing round gasket, fan ring steel pressure plate, upper rubber sealing round gasket, nut with gasket, reaction round steel plate, reaction nut, connecting nut, and hydraulic quick threaded joint used in the water-stopping device can be easily processed or purchased, and are highly practical; (2) During use, the rubber sealing round gasket and the fan ring steel pressure plate are embedded in the cylinder in the middle of the test hole, and the external pressure water is transported to the test hole through the steel tie rod, nut with gasket, reaction round steel plate, reaction nut, connecting nut, and hydraulic quick threaded joint, and the water pressure of the pressure water is used to enhance the sealing effect of the rubber sealing gasket to achieve self-locking water-stopping. The design is reasonable; (3) Compared with the existing method, since there is no need to use a water stop plug, but the water pressure of the pressure water is used to enhance the sealing effect to achieve self-locking water-stopping, it is possible to detect concrete with a thickness of <500mm, which greatly expands the application scope of the existing solid concrete water pressure test method. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view schematic diagram of the use of the present invention.

[0017] Figure 2It is a schematic diagram of the aa cross section of the present invention.

[0018] Figure 3 It is a schematic diagram of the bb cross section of the present invention.

[0019] Figure 4 It is a schematic cross-sectional view of the use of cc in the present invention.

[0020] Figure 5 It is a schematic elevation view of the steel tie rod structure of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with specific embodiments, but the present invention is not limited to these specific embodiments. Those skilled in the art should recognize that the present invention covers all possible alternatives, improvements and equivalents within the scope of the claims.

[0022] Reference Figure 1-5 A self-locking solid concrete water pressure test water-stopping device comprises a steel tie rod 4 inserted into a test hole 12 of a solid concrete 8; the steel tie rod 4 is sequentially sleeved with a lower rubber sealing circular gasket 13, a fan ring steel pressure plate 11, an upper rubber sealing circular gasket 10, a nut with a gasket 9, a reaction circular steel plate 6, a reaction nut 5, a connecting nut 2, and a hydraulic quick threaded joint 1 from bottom to top; the longitudinal axes of the steel tie rod 4, the lower rubber sealing circular gasket 13, the fan ring steel pressure plate 11, the upper rubber sealing circular gasket 10, the nut with a gasket 9, the reaction circular steel plate 6, the reaction nut 5, the connecting nut 2, and the hydraulic quick threaded joint 1 are coaxial; the reaction circular steel plate 6 is mounted on the surface of the solid concrete 8 and covers the lower rubber sealing circular gasket 13, the fan ring steel pressure plate 11, the upper rubber sealing circular gasket 10, the nut with a gasket 9, and part of the steel tie rod 4 thereunder. The present invention embeds an upper rubber sealing circular gasket 10, a fan ring steel pressure plate 11 and a lower rubber sealing circular gasket 13 into a test hole 12, and delivers external pressurized water to the test hole 12 through a steel pull rod 4, a nut with a gasket 9, a reaction circular steel plate 6, a reaction nut 5, a connecting nut 2 and a hydraulic quick threaded joint 1, and utilizes the water pressure of the pressurized water to enhance the sealing effect, thereby achieving self-locking and water-stopping.

[0023] The test hole 12 described in this embodiment has parallel upper and lower surfaces, and its longitudinal axis is perpendicular to the surface of the solid concrete 8, and includes a lower cylinder, a middle cylinder, and an upper cylinder; the lower cylinder has a diameter of 30 mm and a height of 50 mm, and its lower surface is connected to the solid concrete 8, and its upper surface is connected to the lower surface of the middle cylinder; the middle cylinder has a diameter of 46 mm and a height of 25 mm, and its lower surface is connected to the upper surface of the lower cylinder, and its upper surface is connected to the lower surface of the upper cylinder; the upper cylinder has a diameter of 30 mm and a height of 25 mm, and its lower surface is connected to the upper surface of the middle cylinder, and its upper surface is in the same plane as the surface of the solid concrete.

[0024] The steel pull rod 4 described in this embodiment is longitudinally provided with a full-length hollow inner cavity 3 with an inner diameter of 2mm, and includes a lower annular body, a middle screw, a fixed section, and an upper screw from bottom to top; the outer diameter of the lower annular body is 29.5mm, the inner diameter is 2mm, the height is 8mm, and the center of the upper surface is vertically connected to the lower surface of the middle screw; the middle screw has a specification of 12mm, and the upper surface is vertically connected to the lower surface of the fixed section; the fixed section is a regular hexagon, with a diagonal length of 12mm, a height of 15mm, and the upper surface is vertically connected to the lower surface of the upper screw; the upper screw has a specification of 12mm, and is connected to a hydraulic quick threaded connector 1 through a connecting bolt 2, and external pressure water can enter the inner cavity 3 through the hydraulic quick threaded connector 1 to reach the test hole 12.

[0025] The lower rubber sealing circular gasket 13 described in this embodiment has a middle screw sleeved on the inner ring, an outer ring diameter of 45mm, an inner ring diameter of 13mm, a thickness of 2mm, a lower surface in contact with the upper surface of the lower circular ring body of the steel pull rod 4, and an upper surface in contact with the upper surface of the fan ring steel pressure plate 11.

[0026] The fan ring steel pressure plate 11 described in this embodiment is formed by dividing the steel ring plate into four pieces along the longitudinal axis and then assembling them in situ. The middle screw is sleeved on the inner ring. The outer ring has a diameter of 45 mm, the inner ring has a diameter of 13 mm, and a thickness of 8 mm. The lower surface contacts the upper surface of the lower rubber sealing circular gasket 13, and the upper surface contacts the lower surface of the upper rubber sealing circular gasket 10.

[0027] The upper rubber sealing gasket 10 described in this embodiment has a middle screw sleeved on the inner ring, an outer ring diameter of 45 mm, an inner ring diameter of 13 mm, a thickness of 2 mm, a lower surface in contact with the upper surface of the fan ring steel pressure plate 11, and an upper surface in contact with the lower end of the nut with gasket 9, the upper surface of the middle cylinder of the test hole 12 and the cutting surface of the solid concrete 8 respectively.

[0028] The nut with gasket 9 described in this embodiment is screwed on the middle screw, and includes a lower gasket and an upper nut; the lower gasket is 8mm high and 29.5mm in outer diameter, and the lower end contacts the upper surface of the upper rubber sealing gasket 10; the upper nut is a regular hexagon, 14mm high and 20mm in diagonal length.

[0029] The reaction circular steel plate 6 described in this embodiment has a thickness of 10 mm and a diameter of 100 mm. Its lower surface contacts the surface of the solid concrete 8, and its upper surface contacts the lower end of the reaction nut 5. A reaction circular hole 7 with a diameter of 13 mm is drilled in the center, and the middle screw is sleeved therein.

[0030] The reaction nut 5 described in this embodiment is screwed onto the middle screw rod, and the lower end thereof contacts the upper surface of the reaction circular steel plate 6 .

[0031] The operation steps of this embodiment are as follows: (1) grind the surface of the solid concrete 8 with a portable grinder to make it flat; (2) use a small concrete drilling machine to drill a hole perpendicular to the surface of the solid concrete 8, with a depth of 100 mm and a diameter of 30 mm; (3) use a portable grinder + an extension rod + a sintered grinding head, with the upper surface of the sintered grinding head 25 mm away from the surface of the solid concrete 8, and the net distance between the edge of the extension rod and the edge of the sintered grinding head is 8 mm, and the extension rod is rotated and ground close to the side wall of the drill hole to form the upper cylinder and the middle cylinder of the test hole 12; (4) use a portable electric grinder + an extension rod + a sintered grinding head to grind the bottom of the drill hole to make it flat. The lower cylinder of the test hole 12 is formed; (5) The steel tie rod 4 is inserted into the test hole 12, and the upper surface of the lower ring of the steel tie rod 4 is slightly higher than the lower surface of the cylinder in the middle of the test hole 12; (6) The lower rubber sealing round gasket 13 is inserted from the upper screw rod, and is carefully slightly deformed and squeezed into the test hole 12 and lowered to the upper surface of the lower ring of the steel tie rod 4. At this time, the lower rubber sealing round gasket 13 returns to its original shape without deformation; (7) The fan ring steel pressure plate 11 is divided into 4 times, and one piece is clamped with tweezers each time and placed on the upper surface of the lower rubber sealing round gasket 13, and assembled in situ to form the fan ring steel pressure plate 11; (8) The upper rubber sealing round gasket 10 Insert the screw from the upper part, carefully squeeze it into the test hole 12 with slight deformation and lower it to the upper surface of the fan ring steel pressure plate 11. At this time, the upper rubber sealing round gasket 10 returns to its original state without deformation; (9) Screw the nut 9 with gasket from the upper screw to the upper surface of the upper rubber sealing round gasket 10, use a hollow socket wrench to hold the upper nut of the nut 9 with gasket, clamp the fixed section of the steel pull rod 4 with a universal wrench, rotate the hollow socket wrench, and tighten the nut 9 with gasket; (10) Screw the reaction round steel plate 6 from the upper screw to the surface of the solid concrete 8, and screw the reaction nut 5 from the upper screw to the upper surface of the reaction round steel plate 6. Tighten so that the upper surface of the upper rubber sealing round gasket 10 is pressed against the upper surface of the cylinder in the middle of the test hole 12 and the cut surface of the solid concrete 8; (11) One end of the connecting bolt 2 is screwed into the upper screw, and the other end is screwed into the hydraulic quick threaded joint 1, and the connection is tightened; (12) External pressure water is transported to the test hole 12 through the hydraulic quick threaded joint 1 and the inner cavity 3. As the water pressure increases, the upper surface of the lower rubber sealing round gasket 13 presses against the lower surface of the fan ring steel pressure plate 11, and the upper surface of the upper rubber sealing round gasket 10 presses against the upper surface of the cylinder in the middle of the test hole 12 and the cut surface of the solid concrete 8, achieving self-locking water stopping.

Claims

1. A self-locking solid concrete water pressure test water stopping device, characterized in that: It comprises a steel tie rod inserted into a test hole in solid concrete; the test hole has parallel upper and lower surfaces, a longitudinal axis perpendicular to the surface of solid concrete, and comprises a lower cylinder, a middle cylinder and an upper cylinder; the lower cylinder has a diameter of 30 mm and a height of ≥12 mm, the lower surface is connected to the solid concrete, and the upper surface is connected to the lower surface of the middle cylinder; the middle cylinder has a diameter of 45.5 mm-47 mm and a height of 20 mm-30 mm, the lower surface is connected to the upper surface of the lower cylinder, and the upper surface is connected to the lower surface of the upper cylinder; the upper cylinder has a diameter of 30 mm and a height of 25 mm, the lower surface is connected to the upper surface of the middle cylinder, and the upper surface is in the same plane as the surface of solid concrete; The steel pull rod is longitudinally provided with a through-length hollow inner cavity with an inner diameter of 1mm-3mm, and includes a lower annular body, a middle screw, a fixed section and an upper screw from bottom to top; the outer diameter of the lower annular body is 29.0mm-29.5mm, the inner diameter is equal to the inner diameter of the inner cavity, the height is 6mm-12mm, and the center of the upper surface is vertically connected to the lower surface of the middle screw; the specification of the middle screw is 12mm, and the upper surface is vertically connected to the lower surface of the fixed section; the fixed section is a regular hexagon with a diagonal length of 12mm, a height of 10mm-15mm, and the upper surface is vertically connected to the lower surface of the upper screw; the upper screw is 12mm in specification, and is connected to a hydraulic quick threaded joint through a connecting nut, and external pressure water can enter the inner cavity through the hydraulic quick threaded joint to reach the test hole; The steel pull rod is sleeved with a lower rubber sealing round gasket, a fan ring steel pressure plate, an upper rubber sealing round gasket, a nut with a gasket, a reaction round steel plate, a reaction nut, a connecting nut and a hydraulic quick threaded joint in sequence from bottom to top; The lower rubber sealing circular gasket has an outer ring diameter of 45mm, an inner ring diameter of 12.5mm-14mm, a thickness of 1mm-4mm, a lower surface in contact with the upper surface of the lower circular ring of the steel tie rod, an upper surface in contact with the lower surface of the fan ring steel pressure plate, and a middle screw sleeved on the inner ring of the lower rubber sealing circular gasket; The fan ring steel pressure plate is formed by dividing the steel ring plate into four pieces along the longitudinal axis and then assembling them in situ. The outer ring diameter is 45mm, the inner ring diameter is equal to the inner ring diameter of the lower rubber sealing round gasket, the thickness is 6mm-12mm, the lower surface is in contact with the upper surface of the lower rubber sealing round gasket, and the upper surface is in contact with the lower surface of the upper rubber sealing round gasket. The middle screw is sleeved on the inner ring of the fan ring steel pressure plate; The upper rubber sealing round gasket has an outer ring diameter of 45mm, an inner ring diameter equal to the inner ring diameter of the lower rubber sealing round gasket, a thickness of 1mm-4mm, a lower surface in contact with the upper surface of the fan ring steel pressing plate, and an upper surface in contact with the lower end of the gasket nut and the interface between the upper surface of the cylinder in the middle of the test hole and the solid concrete, and the middle screw is sleeved on the inner ring of the upper rubber sealing round gasket; The reaction nut is screwed onto the middle screw rod, and the lower end is in contact with the upper surface of the reaction circular steel plate; The steel tie rod, lower rubber sealing circular gasket, fan ring steel pressure plate, upper rubber sealing circular gasket, nut with gasket, reaction circular steel plate, reaction nut, connecting nut and hydraulic quick threaded joint are coaxial with the longitudinal axis; the reaction circular steel plate is erected on the solid concrete surface and covers the lower rubber sealing circular gasket, fan ring steel pressure plate, upper rubber sealing circular gasket, nut with gasket and part of the steel tie rod thereunder.

2. A self-locking solid concrete water pressure test water stopping device according to claim 1, characterized in that: The nut with gasket is screwed onto the middle screw rod, and comprises a lower gasket and an upper nut; the lower gasket has a height of 6mm-10mm, an outer diameter equal to the outer diameter of the lower circular ring of the steel pull rod, and the lower end contacts the upper surface of the upper rubber sealing circular gasket; the upper nut is a regular hexagon, with a height of 10mm-14mm and a diagonal length of 20mm.

3. A self-locking solid concrete water pressure test water stopping device according to claim 1, characterized in that: The reaction circular steel plate has a thickness of ≥8mm and a diameter of ≥100mm. Its lower surface contacts the solid concrete surface, and its upper surface contacts the lower end of the reaction nut. A reaction circular hole is drilled in the center, and the diameter of the reaction circular hole is 12.5mm-16mm. The middle screw is sleeved in the reaction circular hole.

4. A method for operating a self-locking concrete water pressure test water-stopping device, which is operated by using a self-locking concrete water pressure test water-stopping device as claimed in claim 1, comprising the following operating steps: (1) grinding the surface of the concrete with a portable grinder to make it smooth; (2) drilling a hole vertically on the surface of the concrete with a small concrete drilling machine, with a depth of 100 mm and a diameter of 30 mm; (3) using a portable grinder + an extension rod + a sintered grinding head, with the upper surface of the sintered grinding head 25 mm away from the surface of the concrete, the net distance between the edge of the extension rod and the edge of the sintered grinding head being 8 mm, and the extension rod being tightly Grind along the side wall of the drill hole to form the upper cylinder and the middle cylinder of the test hole; (4) Use a portable electric grinder + extension rod + sintered grinding head to grind the bottom of the drill hole flat to form the lower cylinder of the test hole; (5) Insert the steel pull rod into the test hole, and the upper surface of the lower ring of the steel pull rod is slightly higher than the lower surface of the middle cylinder of the test hole; (6) The lower rubber sealing round gasket is inserted from the upper screw rod, carefully squeezed into the test hole with slight deformation and lowered to the upper surface of the lower ring of the steel pull rod. At this time, the lower rubber sealing round gasket returns to its original shape without deformation; (7) The fan ring steel pressure plate is assembled in 4 times, and each time a piece of steel ring plate is clamped with tweezers and placed at the bottom The upper surface of the rubber sealing round gasket is assembled in situ to form a fan ring steel pressure plate; (8) The upper rubber sealing round gasket is inserted from the upper screw, carefully squeezed into the test hole with slight deformation and lowered to the upper surface of the fan ring steel pressure plate. At this time, the upper rubber sealing round gasket returns to its original shape without deformation; (9) The nut with gasket is screwed into the upper surface of the upper rubber sealing round gasket from the upper screw, the upper nut with gasket nut is clamped with a hollow socket wrench, the fixed section of the steel pull rod is clamped with a universal wrench, the hollow socket wrench is rotated, and the nut with gasket is tightened; (10) The reaction round steel plate is inserted from the upper screw to the surface of the solid concrete, and the reaction screw is screwed into the upper surface of the solid concrete. The nut is screwed from the upper screw rod to the upper surface of the reaction circular steel plate and tightened to make the upper surface of the upper rubber sealing circular gasket press against the interface between the upper surface of the cylinder in the middle of the test hole and the solid concrete; (11) One end of the connecting nut is screwed into the upper screw rod, and the other end is screwed into the hydraulic quick threaded joint and tightened to connect; (12) External pressure water is transported to the test hole through the hydraulic quick threaded joint and the inner cavity. As the water pressure increases, the upper surface of the lower rubber sealing circular gasket presses against the lower surface of the fan ring steel pressure plate, and the upper surface of the upper rubber sealing circular gasket presses against the interface between the upper surface of the cylinder in the middle of the test hole and the solid concrete, achieving self-locking water stopping.

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