Auxiliary device for grouting detection water pressure test

Abstract

The invention relates to the technical field of water pressure tests, in particular to a grouting detection water pressure test auxiliary device which comprises a tank body of a hollow structure, a water inlet hole and a water outlet hole which are communicated with the inner side and the outer side of the tank body are formed in the bottom of the side wall of the tank body, and a piston slides in the middle in the tank body in the vertical direction and is in sealing fit with the tank body. A closed cavity for storing gas is formed above the piston in the tank body; a water stop plug used for covering and blocking the water inlet hole is arranged below the piston, the water stop plug is movably connected with the tank body, and an opening in one end, in the tank body, of the water inlet hole is located on the movement track of the water stop plug; a linkage assembly is arranged between the piston and the water stop plug, and when the piston slides in the tank body, the water stop plug is driven by the linkage assembly to move to cover or open the water inlet hole. The pressure stabilizing tank aims to solve the problem that in the prior art, when a pressure stabilizing tank conducts water pressing tests on some low-permeability stratums, most injected water is discharged through a pressure relief valve, and water resources are wasted to a certain degree.

Description

Technical Field

[0001] The present invention relates to the technical field of water pressure tests, and particularly to an auxiliary device for grouting detection water pressure tests. Background Art

[0002] In hydropower projects, the quality inspection of grouting curtains usually uses water pressure tests (such as Lugeon tests) to evaluate the water permeability of rock masses and the grouting effect. In traditional water pressure tests, a constant water pressure needs to be applied to the borehole through a pressure stabilizing tank, and the water absorption of the rock mass is measured to calculate the water permeability (Lu value).

[0003] Currently, the widely used pressure stabilizing system mainly adopts a three - port pressure stabilizing tank, including:

[0004] Water inlet: Connected to a high - pressure water pump to continuously inject water into the tank;

[0005] Borehole water injection port: Transmits the stabilized water flow to the test section borehole;

[0006] Drainage and pressure relief port: Continuously drains water through a pressure relief valve to maintain pressure stability.

[0007] However, in some low - permeability formations (such as intact bedrock), the water absorption of the borehole is small, resulting in most of the injected water being discharged through the pressure relief valve. The water consumption of the test can reach 5 - 10 times the theoretical demand, which is not suitable for arid regions or environmentally sensitive areas. Summary of the Invention

[0008] In view of this, the purpose of the present invention is to provide an auxiliary device for grouting detection water pressure tests to solve the problem that in the water pressure test of some low - permeability formations by the existing pressure stabilizing tank, most of the injected water is discharged through the pressure relief valve, causing certain waste of water resources.

[0009] The present invention is achieved through the following technical solutions:

[0010] An auxiliary device for grouting detection water pressure tests includes a tank body with a hollow structure. An inlet hole and an outlet hole communicating the inside and outside of the tank body are provided at the bottom of the side wall of the tank body. A piston is slidably and sealingly fitted in the middle of the tank body in the vertical direction, and a sealed chamber for storing gas is formed above the piston in the tank body;

[0011] A water stop plug for covering and blocking the inlet hole is arranged below the piston. The water stop plug is movably connected to the tank body, and the opening at one end of the inlet hole inside the tank body is located on the movement track of the water stop plug;

[0012] A linkage assembly is arranged between the piston and the water stop plug. When the piston slides in the tank body, the water stop plug is driven by the linkage assembly to move to cover or open the inlet hole.

[0013] Further, a cross bar for supporting the water stop plug is arranged inside the tank body. One end of the cross bar is connected to the inner side wall of the tank body, and the other end extends towards the water inlet hole.

[0014] One end of the water stop plug is open and has a hollow structure, and the end facing away from the opening is adapted to the water inlet hole. The open end of the water stop plug is sleeved outside one end of the cross bar facing the water inlet hole and is in sliding fit.

[0015] Further, the aperture of the water inlet hole is smaller than the outer diameter of the water stop plug. The edge of the opening at one end of the water inlet hole inside the tank body is chamfered. The end of the water stop plug facing away from the opening is conical and is adapted to the curved surface of the chamfer of the water inlet hole.

[0016] Further, an elastic support member is arranged between the water stop plug and the cross bar. One end of the elastic support member is fixedly connected to the open end of the water stop plug, and the other end is fixedly connected to the cross bar. When the elastic support member is in a natural extended state, the water stop plug is inserted into the water inlet hole to cover and block the water inlet hole.

[0017] Further, a sleeve is sleeved outside the end of the cross bar facing away from the water inlet hole and is in sliding fit. The end of the sleeve facing away from the water inlet hole is fixedly connected to the side wall of the tank body. An adjusting portion for adjusting the position of the cross bar inside the sleeve is arranged on the sleeve.

[0018] Further, the sleeve has a hollow structure with openings at both ends, and the end of the sleeve facing away from the water inlet hole penetrates through the side wall of the tank body and extends outside the tank body. The cross bar and the sleeve are in single-degree-of-freedom sliding and sealing fit along the length direction of the cross bar.

[0019] The adjusting portion includes a lead screw and a threaded sleeve arranged at the end of the cross bar facing away from the water inlet hole. One end of the lead screw is fixedly connected to the end of the cross bar facing away from the water inlet hole, and the other end extends out of the opening of the sleeve to the outside of the tank body.

[0020] One end of the threaded sleeve is embedded inside the end of the sleeve facing away from the water inlet hole and is in rotational fit with the axis of the threaded sleeve as the center. The threaded sleeve is sleeved outside the lead screw and is connected through thread fit.

[0021] Further, a first sliding groove extending in the length direction of the sleeve is formed on the upper surface of the sleeve, and one end of the first sliding groove penetrates through the wall at one end of the sleeve facing the water inlet hole.

[0022] The linkage assembly includes a rack and a rotating rod arranged above the sleeve. One end of the rack is inserted into the first sliding groove and is in sliding fit, and the other end extends out of the first sliding groove and abuts against the open end of the water stop plug.

[0023] A gear meshing with the rack is arranged inside one end of the first sliding groove facing the water inlet hole. Both ends of the gear are inserted into the two side walls of the first sliding groove and are in rotational fit. One end of the rotating rod is fixedly connected to the outer circular surface of the gear, and the other end extends obliquely upward facing the water inlet hole until it abuts against the bottom surface of the piston, and is slidably connected to the bottom surface of the piston along the length direction of the first sliding groove.

[0024] Furthermore, a second sliding groove parallel to the first sliding groove is formed on the bottom surface of the piston. Convex portions are arranged on both side walls of the end of the rotating rod facing away from the gear. The two convex portions are respectively embedded into the two side walls of the second sliding groove and are in sliding fit along the length direction of the second sliding groove.

[0025] Furthermore, a ventilation hole communicating the inside and outside of the tank body is formed on the top surface of the tank body. A gas valve for controlling the on-off of the ventilation hole is arranged at one end of the ventilation hole outside the tank body.

[0026] Furthermore, a pressure relief hole communicating the inside and outside of the tank body is also arranged at the bottom of the side wall of the tank body. A water valve for controlling the on-off of the pressure relief hole is arranged at one end of the pressure relief hole outside the tank body.

[0027] The beneficial effects of the present invention are as follows:

[0028] For this auxiliary device for grouting detection water pressure test, a closed chamber above the piston is used to hold gas, and the chamber below the piston holds water. By the piston sliding upward in the tank body to increase the volume of the chamber for holding water, the water injected more into the water inlet hole can be stored in this chamber, and water can be steadily injected into the drill hole from the water outlet hole, reducing the waste of water resources.

[0029] Meanwhile, through the linkage assembly, the piston is associated with the water stop plug, and the power of the piston sliding upward or downward in the tank body is transmitted to the water stop plug, enabling the water stop plug to move closer to or away from the water inlet hole, covering or opening the water inlet hole, blocking or connecting the channel for water to enter the tank body, achieving the purpose of automatically controlling the amount of water injected into the tank body, and making the water pressure in the tank body more stable.

[0030] Other advantages, objectives, and features of the present invention will be elaborated to some extent in the subsequent description, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0032] Figure 2 It is a planar structural schematic diagram of an embodiment of the present invention;

[0033] Figure 3 Exploded view of an embodiment of the present invention;

[0034] Figure 4 Schematic three-dimensional structure diagram of removing the tank body in an embodiment of the present invention;

[0035] Figure 5 Schematic three-dimensional structure diagram of the sleeve in an embodiment of the present invention;

[0036] Figure 6 Schematic three-dimensional structure diagram of the cross bar in an embodiment of the present invention;

[0037] Figure 7 Schematic three-dimensional structure diagram of the rotating rod in an embodiment of the present invention;

[0038] Figure 8 Schematic three-dimensional structure diagram of the threaded sleeve in an embodiment of the present invention;

[0039] Figure 9 Schematic three-dimensional structure diagram of the piston in an embodiment of the present invention;

[0040] Figure 10 is Figure 2 Cross-sectional view taken along line A-A in;

[0041] Figure 11 is Figure 10 Enlarged view at position B in

[0042] Figure 12 is Figure 10 Enlarged view at position C in.

[0043] In the figure: 1, tank body; 11, water inlet hole; 12, water outlet hole; 13, sleeve; 131, first chute; 14, ventilation hole; 15, pressure relief hole; 2, piston; 21, second chute; 3, water stop plug; 4, cross bar; 41, lead screw; 42, threaded sleeve; 5, spring; 6, rack; 7, rotating rod; 71, gear. Detailed implementation manners

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0045] Accordingly, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts fall within the scope of protection of the present invention.

[0046] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0047] In the above description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "one side" and "the other side" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use. It is 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 thus should not be construed as a limitation of the present invention. In addition, terms such as "first" and "second" are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0048] In addition, terms such as "the same" do not mean that the components are required to be absolutely the same, but there may be slight differences. The term "vertical" only means that the positional relationship between components is relatively more vertical compared to "parallel", and does not mean that the structure must be completely vertical, but can be slightly inclined.

[0049] Please refer to Figure 1-12 , the present invention provides a technical solution: an auxiliary device for grouting detection water pressure test, including a tank body 1 with a hollow structure. An inlet hole 11 and an outlet hole 12 communicating the inside and outside of the tank body 1 are provided at the bottom of the side wall of the tank body 1. A piston 2 is slidably and sealingly fitted in the middle of the tank body 1 in the vertical direction. A closed chamber for storing gas is formed above the piston 2 in the tank body 1;

[0050] A water stop plug 3 for covering and blocking the inlet hole 11 is provided below the piston 2. The water stop plug 3 is movably connected to the tank body 1, and the opening at one end of the inlet hole 11 inside the tank body 1 is located on the movement track of the water stop plug 3;

[0051] A linkage assembly is provided between the piston 2 and the water stop plug 3. When the piston 2 slides in the tank body 1, the water stop plug 3 is driven by the linkage assembly to move to cover or open the inlet hole 11.

[0052] In this solution, a sealed chamber above the piston 2 is used to hold gas, and the chamber below the piston 2 holds water. By the upward sliding of the piston 2 in the tank body 1 to increase the volume of the chamber for holding water, the extra water injected through the water inlet hole 11 can be stored in this chamber, and water can be steadily injected into the drilling hole from the water outlet hole 12, reducing the waste of water resources.

[0053] Meanwhile, the piston 2 is associated with the water stop plug 3 through a linkage component, and the power of the upward or downward sliding of the piston 2 in the tank body 1 is transmitted to the water stop plug 3, making the water stop plug 3 move closer to or away from the water inlet hole 11, covering or opening the water inlet hole 11, blocking or connecting the channel for water to enter the tank body 1, achieving the purpose of automatically controlling the water injection volume into the tank body 1 and making the water pressure in the tank body 1 more stable.

[0054] Among them, a structure similar to a diaphragm type pressure stabilizing tank is formed by the tank body 1 and the piston 2. The interior of the diaphragm type pressure stabilizing tank is separated into an air chamber and a water chamber by a diaphragm. Compressed air is injected into one side (air chamber) of the diaphragm through an air charging valve to set the initial air pressure, and then water is injected into the other side (water chamber) of the diaphragm by a water pump. The diaphragm is deformed under pressure, compressing the air in the air chamber, and the pressure in the tank rises. When the pressure is too high (such as when the water absorption volume of the drilling hole decreases), the air chamber is further compressed to absorb the excess pressure and avoid overpressure. When the pressure decreases (such as when the water absorption volume of the drilling hole increases), the air chamber expands, pushing the diaphragm to drain water and maintaining the pressure stability. The piston 2 corresponds to the diaphragm, the sealed chamber above the piston 2 corresponds to the air chamber, and the chamber below the piston 2 corresponds to the water chamber.

[0055] In addition, the water stop plug 3 can be slidably connected to the inner side wall of the tank body 1 along the vertical direction and rotationally connected with the axis of the tank body 1 as the center. When the water stop plug 3 is moved to be opposite to the water inlet hole 11, it can cover the water inlet hole 11 to achieve the purpose of water stopping; or the water stop plug 3 can be arranged in the extension direction of the water inlet hole 11, and the water stop plug 3 is slidably connected to the side wall of the tank body 1 along the extension direction of the water inlet hole 11. The purpose of water stopping is achieved by sliding the water stop plug 3 into the water inlet hole 11. Here, the latter is preferred.

[0056] Furthermore, equipment such as an air charging pump and a pressure gauge can be arranged at the top of the tank body 1 for monitoring and adjusting the air pressure in the sealed chamber.

[0057] The usage steps are as follows:

[0058] Step 1: Connect the water outlet hole 12 to the drilling hole water injection joint through a high-pressure hose, and connect the water inlet hole 11 to the water outlet end of the high-pressure water pump. Check that each pipeline has no leakage;

[0059] Step 2: Start the air charging pump, and charge compressed air (or nitrogen) into the sealed chamber (air chamber) above the piston 2 to make the air pressure reach 70%-80% of the test target pressure (for example, when the test pressure is 1 MPa, the pre-charged air pressure is set to 0.7-0.8 MPa). Close the air charging valve, observe whether the pressure gauge is stable, and confirm the airtightness of the air chamber;

[0060] Step 3: Briefly turn on the water pump to inject water into the water chamber below the piston 2, discharging the air in the pipeline and the tank body 1 until continuous bubble-free water flows out of the drilling opening, and then stop injecting water.

[0061] Step 4: Use a plug to block the detection section of the drilling. Turn on the high-pressure water pump again. The water flows into the water chamber of the tank body 1 through the water inlet hole 11, pushing the piston 2 to slide upward, compressing the gas in the air chamber. The pressure in the tank gradually rises to the test set value (such as 1 MPa). The linkage component drives the water stop plug 3 to move towards the water inlet hole 11 as the piston 2 rises. When the pressure reaches the set value, the water stop plug 3 partially covers the water inlet hole 11, automatically reducing the water injection volume to maintain dynamic balance.

[0062] Step 5: If the water absorption of the drilling increases (pressure drops), the gas in the air chamber expands, pushing the piston 2 to move downward. The linkage component pulls the water stop plug 3 away from the water inlet hole 11 to increase the water injection volume to compensate for the pressure loss. If the water absorption of the drilling decreases (pressure rises), the water pressure pushes the piston 2 to move upward, and the water stop plug 3 further covers the water inlet hole 11 to reduce the water injection volume and avoid overpressure.

[0063] Step 6: Record the water injection flow rate (through the flow meter) and the stable pressure value every 5 minutes for at least 30 minutes.

[0064] In this embodiment: A cross bar 4 for supporting the water stop plug 3 is arranged in the tank body 1. One end of the cross bar 4 is connected to the inner side wall of the tank body 1, and the other end extends towards the water inlet hole 11.

[0065] One end of the water stop plug 3 has an open hollow structure, and the end facing away from the opening is adapted to the water inlet hole 11. The open end of the water stop plug 3 is sleeved outside one end of the cross bar 4 facing the water inlet hole 11 and is in sliding fit.

[0066] In this solution, as Figure 3 、 4 shown, sleeving the water stop plug 3 on the cross bar 4 can avoid radial swing caused by water pressure fluctuations, ensure that it always aligns with the center of the water inlet hole 11, and improve the sealing performance of the plugging.

[0067] Among them, one end of the cross bar 4 facing away from the water inlet hole 11 can be fixedly connected to the inner wall of the tank body 1, or the cross bar 4 can penetrate through the side wall of the tank body 1 and extend out of the tank body 1, and be connected by means such as clamping and threaded connection to restrict the axial movement of the cross bar 4. However, the cross bar 4 has the ability to move closer to or away from the water inlet hole 11, and the water stop plug 3 can be manually controlled to move the cross bar 4 to insert into the water inlet hole 11 to stably plug the water inlet hole 11.

[0068] In this embodiment: the aperture diameter of the water inlet hole 11 is smaller than the outer diameter of the water stop plug 3. The edge of the opening at one end of the water inlet hole 11 inside the tank body 1 is chamfered. The end of the water stop plug 3 facing away from the opening is conical and is adapted to the curved surface of the chamfer of the water inlet hole 11.

[0069] In this solution, as Figure 10 shown, by setting the end of the water stop plug 3 facing away from the opening to be conical, the water stop plug 3 can form a holding state with the curved surface of the chamfer of the water inlet hole 11, improving the sealing performance. Moreover, the conical end of the water stop plug 3 has a guiding function. During the movement of the water stop plug 3, the conical surface slides along the inclined surface of the water inlet hole 11, which can automatically correct the axial deviation and further improve the sealing performance.

[0070] In this embodiment: an elastic support member is provided between the water stop plug 3 and the cross bar 4. One end of the elastic support member is fixedly connected to the opening end of the water stop plug 3, and the other end is fixedly connected to the cross bar 4. When the elastic support member is in a natural stretched state, the water stop plug 3 is inserted into the water inlet hole 11 to cover and block the water inlet hole 11.

[0071] In this solution, the elastic support member can be selected as a spring 5. The spring 5 is sleeved outside the cross bar 4 to provide elastic support for the water stop plug 3 by using the spring 5. When the high-pressure water flow impacts the water stop plug 3, the spring 5 can play an elastic damping role and can suppress the pressure oscillation caused by the water flow impact.

[0072] In this embodiment: a sleeve 13 is sleeved outside the end of the cross bar 4 facing away from the water inlet hole 11 and is in sliding fit. The end of the sleeve 13 facing away from the water inlet hole 11 is fixedly connected to the side wall of the tank body 1. An adjusting portion for adjusting the position of the cross bar 4 inside the sleeve 13 is provided on the sleeve 13.

[0073] In this solution, as Figure 4 shown, the cross bar 4 is rigidly supported by the sleeve 13 to limit the lateral swing of the cross bar 4, making the connection between the water stop plug 3 and the water inlet hole 11 more stable. Moreover, the cross bar 4 is slidably connected to the sleeve 13. By driving the cross bar 4 to slide inside the sleeve 13 through the adjusting portion, the purpose of moving the cross bar 4 closer to or farther away from the water inlet hole 11 is achieved. When the water stop plug 3 abuts against the inner wall of the tank body 1 (at the water inlet hole 11), by driving the cross bar 4 to approach or move away from the water inlet hole 11 through the adjusting portion, the deformation amount of the spring 5 in the initial state is changed, that is, the minimum water pressure for the water flow to drive the water stop plug 3 to move and open the water inlet hole 11 is changed, improving the tightness between the water stop plug 3 and the water inlet hole 11.

[0074] In this embodiment: the sleeve 13 has a hollow structure with openings at both ends, and the end of the sleeve 13 facing away from the water inlet hole 11 penetrates through the side wall of the tank body 1 and extends outside the tank body 1. The cross bar 4 and the sleeve 13 are slidably and hermetically engaged with each other in a single degree of freedom along the length direction of the cross bar 4;

[0075] The adjusting part includes a lead screw 41 and a threaded sleeve 42 arranged at one end of the cross bar 4 facing away from the water inlet hole 11. One end of the lead screw 41 is fixedly connected to the end of the cross bar 4 facing away from the water inlet hole 11, and the other end extends out of the opening of the sleeve 13 to the outside of the tank body 1;

[0076] One end of the threaded sleeve 42 is embedded in the end of the sleeve 13 facing away from the water inlet hole 11 and is rotationally fitted with the axis of the threaded sleeve 42 as the center. The threaded sleeve 42 is sleeved outside the lead screw 41 and is connected by a threaded fit.

[0077] In this solution, as Figure 5 、 6 shown, one section of the cross bar 4 facing away from the water inlet hole 11 is prism-shaped, and the inside of the sleeve 13 is adapted to the cross bar 4, so that the cross bar 4 can only slide along the length direction of the sleeve 13. The cross bar 4 and the sleeve 13 are in a sealed fit, which can prevent the water in the tank body 1 from moving out through the sleeve 13.

[0078] In addition, the middle part of the threaded sleeve 42 is rotationally fitted with the sleeve 13, and the diameter of the middle part is smaller than the outer dimensions of both ends. As Figure 8 shown, it can prevent the threaded sleeve 42 from moving axially. By connecting the threaded sleeve 42 and the lead screw 41 by a threaded fit, only by rotating the threaded sleeve 42, the cross bar 4 can be driven by the lead screw 41 to slide closer to or away from the water inlet hole 11, as Figure 10 shown, so as to achieve the purpose of changing the deformation amount of the spring 5 in the initial state.

[0079] Furthermore, as Figure 1 shown, one end of the lead screw 41 extending out of the tank body 1, the length of the section of the lead screw 41 extending out of the tank body 1 (outside the threaded sleeve 42) can be measured to calculate and obtain the elastic force of the spring 5 at the initial time.

[0080] In this embodiment: a first sliding groove 131 extending in the length direction of the sleeve 13 is formed on the upper surface of the sleeve 13, and one end of the first sliding groove 131 penetrates through the end wall of the sleeve 13 facing the water inlet hole 11;

[0081] The linkage assembly includes a rack 6 and a rotating rod 7 arranged above the sleeve 13. One end of the rack 6 is inserted into the first sliding groove 131 and is in sliding fit, and the other end extends out of the first sliding groove 131 and abuts against the open end of the water stop plug 3;

[0082] A gear 71 meshing with the rack 6 is arranged in the first sliding groove 131 facing the water inlet hole 11. Both ends of the gear 71 are inserted into the side walls of the first sliding groove 131 and are in rotational fit. One end of the rotating rod 7 is fixedly connected to the outer circular surface of the gear 71, and the other end extends obliquely upward facing the water inlet hole 11 to abut against the bottom surface of the piston 2 and is slidably connected to the bottom surface of the piston 2 along the length direction of the first sliding groove 131.

[0083] In this solution, asFigure 10 , 11 As shown in 11 , a labor-saving lever structure is formed by the rotating rod 7 and the gear 71. The rotation center line of the gear 71 on the sleeve 13 (the axis of the gear 71) is the fulcrum. The section from the end of the rotating rod 7 facing away from the gear 71 to the axis of the gear 71 is the power arm, and the section from the top circle of the teeth in the gear 71 to the axis of the gear 71 is the resistance arm. That is, during the sliding process of the piston 2, a relatively small external force is applied to the rotating rod 7, and the rack 6 can be driven to slide through the gear 71. After the force is amplified, it is transmitted to the water stop plug 3 to assist the water stop plug 3 to slide and adjust the size of the water inlet channel.

[0084] The rack 6 can present the following four states when sliding in the first chute 131:

[0085] State 1: The rack 6 abuts against the water stop plug 3, and the water stop plug 3 abuts against the inner wall of the tank body 1 (the water inlet hole 11 is covered and blocked), as shown in Figure 10 . Figure 10 as shown;

[0086] State 2: The rack 6 does not abut against the water stop plug 3, and the water stop plug 3 abuts against the inner wall of the tank body 1 (the water inlet hole 11 is covered and blocked);

[0087] State 3: The rack 6 does not abut against the water stop plug 3, and the water stop plug 3 does not abut against the inner wall of the tank body 1 (the water inlet hole 11 is open);

[0088] State 4: The rack 6 abuts against the water stop plug 3, and the water stop plug 3 does not abut against the inner wall of the tank body 1 (the water inlet hole 11 is open).

[0089] During use, in Step 2, compressed air is filled into the closed chamber above the piston 2. The piston 2 moves downward to drive the rack 6 away from the water stop plug 3. The water stop plug 3 abuts against the inner wall of the tank body 1 under the elastic force of the spring 5, and it is converted from State 1 to State 2;

[0090] In Step 4, the high-pressure water pump is turned on again. Under the impact of the water flow, the water stop plug 3 is pushed to open the water inlet channel, so that the water stop plug 3 moves to abut against the rack 6, and it is converted from State 2 to State 4 until the water pressure is stable;

[0091] In Step 5, if the water absorption of the drill hole increases (the pressure drops), the piston 2 moves downward, and it is converted from State 4 to State 3, reducing or canceling the resistance of the rack 6 to the movement of the water stop plug 3 away from the water inlet hole 11, further opening the water inlet hole 11, and increasing the water inflow.

[0092] If the water absorption of the drill hole decreases (the pressure rises), the piston 2 moves upward, and the rack 6 applies a thrust to the water stop plug 3 to promote the movement of the water stop plug 3 closer to the water inlet hole 11, reducing the water inlet channel or blocking the water inlet channel (converted from State 4 to State 1), thereby reducing the water inflow to avoid overpressure.

[0093] Therefore, the combined action of the piston 2 and the spring 5 drives the water stop plug 3 to move, automatically and dynamically adjust the size of the water inlet channel, thereby controlling the water inflow, saving water resources, and injecting water into the drill hole more smoothly.

[0094] In this embodiment: a second chute 21 parallel to the first chute 131 is formed on the bottom surface of the piston 2. On both side walls of the end of the rotating rod 7 facing away from the gear 71, there are protruding parts, and the two protruding parts are respectively embedded in the side walls of the second chute 21 and are slidably matched along the length direction of the second chute 21.

[0095] In this solution, the protruding part is a frustum protruding from the side wall of the rotating rod 7. On both side walls of the second chute 21, there are grooves extending in the length direction of the second chute 21. The frustum is embedded in the grooves, and the outer circular surface of the frustum is respectively in contact with the top surface and the bottom surface of the grooves, so that the frustum can slide in the grooves and can rotate around the axis of the frustum, enabling the rotating rod 7 to rotate normally on the sleeve 13 and change the inclination angle.

[0096] In this embodiment: a vent hole 14 communicating the inside and outside of the tank body 1 is formed on the top surface of the tank body 1, and a gas valve for controlling the on-off of the vent hole 14 is arranged at one end of the vent hole 14 outside the tank body 1.

[0097] In this solution, the vent hole 14 serves as a channel for the gas to flow inside and outside the air chamber, so as to inject gas into the air chamber or extract the gas inside the air chamber, and adjust the air pressure in the air chamber according to the requirements of the water pressure test. The gas valve can block the gas flow channel and keep the air pressure in the air chamber stable.

[0098] In this embodiment: a pressure relief hole 15 communicating the inside and outside of the tank body 1 is further arranged at the bottom of the side wall of the tank body 1, and a water valve for controlling the on-off of the pressure relief hole 15 is arranged at one end of the pressure relief hole 15 outside the tank body 1.

[0099] In this solution, the pressure relief hole 15 is used to discharge the water in the water chamber, and the water valve is used to control the on-off of the pressure relief hole 15, and can be selected as a pressure relief valve or a stop valve, etc. When disassembling the device after the test, only need to control the water valve to slowly open for drainage, and relieve the pressure of the water in the tank body 1, which can effectively reduce the risk of the high-pressure water in the tank body 1 instantaneously releasing and injuring the staff during the disassembly process.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. An auxiliary device for the grouting detection water pressure test, comprising a tank body (1) with a hollow structure. A water inlet hole (11) and a water outlet hole (12) for communicating the inside and outside of the tank body (1) are arranged at the bottom of the side wall of the tank body (1). It is characterized in that: In the middle of the tank body (1), a piston (2) is slidably and sealingly fitted vertically. Above the piston (2) in the tank body (1), a closed chamber for storing gas is formed. Below the piston (2), a water stop plug (3) for covering and blocking the water inlet hole (11) is provided. The water stop plug (3) is movably connected to the tank body (1), and the opening at one end of the water inlet hole (11) inside the tank body (1) is located on the movement track of the water stop plug (3). A linkage assembly is arranged between the piston (2) and the water stop plug (3). When the piston (2) slides in the tank body (1), the water stop plug (3) is driven by the linkage assembly to move to cover or open the water inlet hole (11).

2. The grouting detection water pressure test auxiliary device according to claim 1, characterized in that: A cross bar (4) for supporting the water stop plug (3) is arranged in the tank body (1). One end of the cross bar (4) is connected to the inner side wall of the tank body (1), and the other end extends towards the water inlet hole (11). One end opening of the water stop plug (3) is of a hollow structure, and the end opposite to the opening is adapted to the water inlet hole (11). The opening end of the water stop plug (3) is sleeved outside one end of the cross bar (4) facing the water inlet hole (11) and is slidably fitted.

3. The grouting detection water pressure test auxiliary device according to claim 2, characterized in that: The aperture of the water inlet hole (11) is smaller than the outer diameter of the water stop plug (3). The edge of the opening at one end of the water inlet hole (11) inside the tank body (1) is chamfered. The end opposite to the opening of the water stop plug (3) is conical and is adapted to the chamfered curved surface of the water inlet hole (11).

4. The grouting detection water pressure test auxiliary device according to claim 2, characterized in that: An elastic support member is arranged between the water stop plug (3) and the cross bar (4). One end of the elastic support member is fixedly connected to the opening end of the water stop plug (3), and the other end is fixedly connected to the cross bar (4). When the elastic support member is in a natural stretching state, the water stop plug (3) is inserted into the water inlet hole (11) to cover and block the water inlet hole (11).

5. The grouting detection water pressure test auxiliary device according to claim 4, characterized in that: A sleeve (13) is sleeved outside the end of the cross bar (4) opposite to the water inlet hole (11) and is slidably fitted. The end of the sleeve (13) opposite to the water inlet hole (11) is fixedly connected to the side wall of the tank body (1). An adjusting portion for adjusting the position of the cross bar (4) inside the sleeve (13) is arranged on the sleeve (13).

6. The grouting detection water pressure test auxiliary device according to claim 5, characterized in that: The sleeve (13) is of a hollow structure with both ends open, and the end of the sleeve (13) opposite to the water inlet hole (11) penetrates through the side wall of the tank body (1) and extends outside the tank body (1). The cross bar (4) and the sleeve (13) are slidably and sealingly fitted with a single degree of freedom along the length direction of the cross bar (4). The adjusting portion includes a lead screw (41) and a threaded sleeve (42) arranged at the end of the cross bar (4) opposite to the water inlet hole (11). One end of the lead screw (41) is fixedly connected to the end of the cross bar (4) opposite to the water inlet hole (11), and the other end extends out of the opening of the sleeve (13) to the outside of the tank body (1). One end of the threaded sleeve (42) is embedded inside the end of the sleeve (13) opposite to the water inlet hole (11) and is rotatably fitted with the axis of the threaded sleeve (42) as the center. The threaded sleeve (42) is sleeved outside the lead screw (41) and is connected by thread fit.

7. The grouting detection water pressure test auxiliary device according to claim 5, characterized in that: A first sliding groove (131) extending in the length direction of the sleeve (13) is opened on the upper surface of the sleeve (13), and one end of the first sliding groove (131) penetrates through the wall at one end of the sleeve (13) facing the water inlet hole (11). The linkage assembly includes a rack (6) and a rotating rod (7) arranged above the sleeve (13). One end of the rack (6) is inserted into the first sliding groove (131) and is in sliding fit, and the other end extends out of the first sliding groove (131) and abuts against the open end of the water stop plug (3). A gear (71) meshing with the rack (6) is arranged at one end of the first sliding groove (131) facing the water inlet hole (11). Both ends of the gear (71) are inserted into the two side walls of the first sliding groove (131) and are in rotational fit. One end of the rotating rod (7) is fixedly connected to the outer circumferential surface of the gear (71), and the other end extends obliquely upward facing the water inlet hole (11) until it abuts against the bottom surface of the piston (2), and is slidably connected to the bottom surface of the piston (2) along the length direction of the first sliding groove (131).

8. The grouting detection water pressure test auxiliary device according to claim 7, characterized in that: A second sliding groove (21) parallel to the first sliding groove (131) is formed in the bottom surface of the piston (2). Convex portions are provided on both side walls of the end of the rotating rod (7) facing away from the gear (71). The two convex portions are respectively embedded in the two side walls of the second sliding groove (21) and are in sliding fit along the length direction of the second sliding groove (21).

9. The grouting detection water pressure test auxiliary device according to claim 1, characterized in that: A ventilation hole (14) communicating the inside and outside of the tank body (1) is formed in the top surface of the tank body (1). A gas valve for controlling the on-off of the ventilation hole (14) is arranged at one end of the ventilation hole (14) outside the tank body (1).

10. The grouting detection water pressure test auxiliary device according to claim 1, characterized in that: A pressure relief hole (15) communicating the inside and outside of the tank body (1) is further arranged at the bottom of the side wall of the tank body (1). A water valve for controlling the on-off of the pressure relief hole (15) is arranged at one end of the pressure relief hole (15) outside the tank body (1).

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