Slurry storage pressure tank for indoor grouting simulation test

Abstract

The utility model discloses a slurry storage pressure tank for an indoor grouting simulation test, which belongs to the technical field of test equipment and comprises a vertical tank body, the tank body is rotatably connected with a mounting support through a horizontal cross shaft, and the bottom of the tank body is suspended so that the tank body can overturn around the cross shaft; the top and the bottom of the tank body are respectively provided with a slurry inlet pipe and a slurry outlet pipe, the slurry inlet pipe and the slurry outlet pipe are vertically arranged, and one side of the slurry inlet pipe is provided with an air inlet assembly. According to the grout storage pressure tank for the indoor grouting simulation test, the accuracy and efficiency of the grouting simulation test are improved, specifically, the tank body can be overturned around the transverse shaft, and the problem that grouting materials are discharged unevenly due to the segregation effect within the time difference after grout feeding and before grout discharging is effectively solved; and the tank body, the slurry inlet pipe and the slurry outlet pipe are integrally designed, so that the risk of grouting material leakage caused by poor airtightness of the tank body in a high-pressure grouting environment is avoided, and the test operation difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to a grout storage pressure tank for indoor grouting simulation tests, belonging to the technical field of test equipment. Background Technology

[0002] Underground engineering projects such as highway tunnels, urban subways, water diversion tunnels, and mining operations are prone to encountering water-rich and weak strata, which can trigger sudden water inrush disasters. Currently, grouting technology has become a common method for controlling sudden water inrush disasters in underground engineering projects. The effectiveness of grouting is closely related to the performance of the grouting materials and the selection of grouting processes. Conducting indoor grouting simulation tests before construction can simulate the geological conditions and construction environment in actual projects, accurately measure key performance indicators of grouting materials such as permeability, gelation time, and compressive strength, and provide a scientific basis for the selection of grouting materials and the determination of grouting parameters such as grouting pressure and grout diffusion radius.

[0003] Indoor grouting simulation tests generally employ a pressure-stabilized grouting method. Specifically, this involves maintaining the required grouting pressure through a gas pressure system, and then injecting the grout from the storage tank into the reinforced medium. Cement grout, a commonly used grouting material, often has a high water-cement ratio, making it prone to sedimentation and segregation after a period of time. Existing storage tanks typically employ a cylindrical, fixed tank design. For example, patent application CN106706845A, which discloses a "pressure-stabilized continuous indoor simulated grouting test device and method," equips the storage tank and injection tank with bases, casters, and lifting platforms, allowing them to move horizontally on the ground and vertically in space, thus completing the grout replenishment and external grouting process. However, this design does not address the issue of whether the grout in the tank remains homogeneous before discharge. When the water-cement ratio of the grouting material is high, the grout is prone to stratification within the tank, leading to uneven discharge and affecting the grouting effect and the accuracy of the test.

[0004] Furthermore, the traditional combined tank body and lid design of grout storage tanks makes it difficult to ensure good sealing during use. Under high-pressure grouting conditions, gaps in the tank body may cause the grouting pressure to become unstable, affecting the continuity and uniformity of grouting. For example, in patent application CN106049557A, which discloses "An indoor test device and test method for simulating post-grouting at the pile end of a cast-in-place pile," the top of the grout storage tank is equipped with a flange cover. In practical applications, the connection between the flange cover and the tank body often becomes a weak point in the seal. Utility Model Content

[0005] In order to solve the problems existing in the prior art, this utility model provides a grout storage pressure tank for indoor grouting simulation test. It overcomes the problems of uneven discharge caused by segregation of grouting material and poor sealing caused by the combined design of tank body and top cover in existing grout storage tanks, thereby improving the accuracy and efficiency of grouting simulation test.

[0006] This utility model achieves the above objectives by adopting the following technical solutions:

[0007] A grout storage pressure tank for indoor grouting simulation test includes a vertical tank body, which is rotatably connected to a mounting support via a horizontally set transverse axis, and the bottom of the tank body is suspended so that the tank body can rotate around the transverse axis.

[0008] The tank body is provided with an inlet pipe and an outlet pipe at the top and bottom, respectively. The inlet pipe and outlet pipe are vertically arranged, and an air inlet assembly is provided on one side of the inlet pipe.

[0009] Optionally, the air intake assembly includes a protective tube, a protective valve core, and an air intake pipe. The first end of the protective tube is connected to one side of the slurry inlet pipe, and the air intake pipe is connected to one side of the protective tube. An air intake valve and a pressure gauge are provided on the air intake pipe. The protective valve core is slidably disposed inside the protective tube along its axis. The protective valve core is tightly sealed against the inner wall of the protective tube. When the protective valve core moves to the first end of the protective tube, it will block the connection between the protective tube and the tank. When the protective valve core moves to the second end of the protective tube, it will open the connection between the protective tube and the tank, as well as the connection between the air intake pipe and the protective tube.

[0010] The second end of the protective tube is sealed with an end cap, and a threaded tube is fixed on the end cap. A valve stem is connected to the protective valve core. The valve stem passes through the protective tube from the end cap. The threaded tube is threaded onto the valve stem. The rotation of the valve stem relative to the threaded tube will drive the protective valve core to move along the axis of the protective tube.

[0011] Optionally, the horizontal axis is located in the upper middle part of the tank.

[0012] Optionally, a horizontal shaft is provided on each of the left and right sides of the tank body, and the horizontal shaft is mounted on the mounting support through a bearing seat.

[0013] Optionally, a circular handwheel is fixedly connected to the end of the horizontal shaft.

[0014] Optionally, the inlet pipe and outlet pipe are respectively connected to internal thread straight connectors.

[0015] Optionally, a three-piece ball valve is installed on the internal thread straight connector on the slurry inlet pipe.

[0016] Optionally, the internal threaded straight connector on the slurry outlet pipe is used to connect a high-pressure hose.

[0017] Optionally, the intake pipe is connected to an air compressor via a pressure pipe.

[0018] Furthermore, the grout storage pressure tank for indoor grouting simulation test provided by this utility model also includes a locking assembly. The locking assembly includes a pin and a socket plate disposed on the mounting base. A pin hole is provided on the horizontal axis, and the pin passes through the pin hole and is inserted into the socket plate.

[0019] The beneficial effects of this application include, but are not limited to:

[0020] The grout storage pressure tank provided by this utility model for indoor grouting simulation tests improves the accuracy and efficiency of grouting simulation tests. Specifically, by allowing the tank to rotate around a horizontal axis, it effectively solves the problem of uneven grout discharge caused by segregation during the time difference between grout inlet and outlet. The integrated design of the tank, inlet pipe, and outlet pipe avoids the risk of grout leakage due to poor tank airtightness under high-pressure grouting conditions, reducing the difficulty of test operation. During the tank rotation process, the grout will not enter the air inlet pipe, ensuring the cleanliness and sealing of the air inlet pipe and accessories. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 A schematic diagram of the grout storage pressure tank for indoor grouting simulation tests provided by this utility model;

[0023] Figure 2 This is an enlarged view of the intake assembly, showing the protective valve core moved to the first end;

[0024] Figure 3 This is a schematic diagram showing the protective valve core in the intake assembly moving to the second end.

[0025] In the diagram, 100 is the tank body; 110 is the slurry inlet pipe; 120 is the slurry outlet pipe; 130 is the internal thread straight connector; 200 is the horizontal shaft; 210 is the seated bearing; 300 is the mounting bracket; 400 is the air inlet assembly; 410 is the protective pipe; 411 is the end cap; 412 is the threaded pipe; 420 is the protective valve core; 421 is the valve stem; 430 is the air inlet pipe; 431 is the air inlet valve; 432 is the pressure gauge; 500 is the handwheel; 600 is the three-piece ball valve; 710 is the pin; and 720 is the orifice plate. Detailed Implementation

[0026] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0027] It should be noted that many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0028] like Figure 1 As shown, the grout storage pressure tank for indoor grouting simulation test provided by this utility model includes a vertical tank body 100. The tank body 100 is rotatably connected to the mounting support 300 through a horizontally set transverse axis 200. The bottom of the tank body 100 is suspended so that the tank body 100 can rotate around the transverse axis 200.

[0029] The tank body 100 is provided with an inlet pipe 110 and an outlet pipe 120 at the top and bottom respectively. The inlet pipe 110 and the outlet pipe 120 are arranged vertically, and an air inlet assembly 400 is provided on one side of the inlet pipe 110.

[0030] The inlet pipe 110 is used to inject grouting material into the tank 100, and the outlet pipe 120 is used to discharge the grouting material from the tank 100. The inlet pipe 110 and the outlet pipe 120 are welded to the tank 100 or integrally formed, which avoids the problem of weak sealing at the connection between the top cover and the tank 100 in traditional grout storage tanks.

[0031] To prevent segregation of the grouting material inside the tank due to prolonged static time, dynamic intervention is required to prevent the material from remaining stationary for extended periods. However, using a dynamic intervention method involving an agitator inside the tank to mix the grouting material has several drawbacks: First, the connection between the agitator and the tank creates an additional sealing point, affecting the overall sealing performance of the grouting pressure tank. Second, grouting material adhering to the agitator increases the cleaning workload after the test. Third, the agitator typically requires a motor drive, increasing energy consumption and complicating the structure of the grouting pressure tank, potentially increasing the number of points of failure.

[0032] Since the indoor grouting simulation test uses a small tank, the grout storage pressure tank provided by this utility model can be manually rotated around the horizontal axis 200 to make the grouting material inside the tank 100 rotate and mix, ensuring that the grouting material is in a homogeneous state. There is no need to set up a stirring slurry inside the tank 100, which simplifies the structure of the tank 100.

[0033] To facilitate the flipping of the tank 100, a circular handwheel 500 is preferably fixedly connected to the end of the horizontal shaft 200, which saves more effort. In actual operation, the tank 100 can be flipped alternately by turning it half a turn clockwise and half a turn counterclockwise, which can prevent the connecting pipes on the tank 100 from getting tangled.

[0034] To achieve stable grouting pressure, gas at a certain pressure needs to be introduced into the tank 100 through the air inlet assembly 400 to maintain the required grouting pressure. Traditional grout storage tanks have the air inlet pipe located at the top of the tank, and the tank is fixed and does not need to be tilted, so the grouting material inside the tank will not enter the air inlet pipe. However, the tank in this application needs to be tilted. If the air inlet pipe is exposed and connected to the tank, the grouting material inside the tank will enter the air inlet pipe during the tilting process. To solve this problem, the air inlet assembly 400 in this invention includes a protective pipe 410, a protective valve core 420, and an air inlet pipe 430.

[0035] Specifically, the first end of the protective pipe 410 is connected to one side of the slurry inlet pipe 110, and the air inlet pipe 430 is connected to one side of the protective pipe 410. The air inlet pipe 430 is equipped with an air inlet valve 431 and a pressure gauge 432.

[0036] A protective valve core 420 is slidably disposed inside the protective tube 410 along its axis, and the protective valve core 420 is tightly sealed to the inner wall of the protective tube 410.

[0037] like Figure 2 As shown, when the protective valve core 420 moves to the first end of the protective pipe 410, it will block the connection between the protective pipe 410 and the tank body 100. When the tank body 100 is overturned, the grouting material cannot enter the protective pipe 410, and therefore cannot enter the air inlet pipe 430. In practical applications... Figure 2 In the indicated state, the front end of the protective valve core 420 should be flush with the inner wall of the tank 100.

[0038] like Figure 3 As shown, when the protective valve core 420 moves to the second end of the protective tube 410, it will open the connection between the protective tube 410 and the tank 100, as well as the connection between the air inlet pipe 430 and the protective tube 410. At this time, gas can enter the tank 100 through the air inlet pipe 430 and the protective tube 410.

[0039] To facilitate the operation of the protective valve core 420 and its movement within the protective tube 410, this invention includes an end cap 411 sealing the second end of the protective tube 410. A threaded tube 412 is fixed to the end cap 411, and a valve stem 421 is connected to the protective valve core 420. The valve stem 421 extends out of the protective tube 410 from the end cap 411, and the threaded tube 412 is threaded onto the valve stem 421. Rotation of the valve stem 421 relative to the threaded tube 412 will cause the protective valve core 420 to move along the axis of the protective tube 410. For ease of operation, a rotating handle is typically provided at the end of the valve stem 421.

[0040] In a preferred embodiment, the horizontal axis 200 is located in the upper middle part of the tank body 100, so that the center of gravity of the tank body 100 is lower and the tank body 100 can be maintained in a state where the inlet pipe 110 is on top and the outlet pipe 120 is on the bottom when no external force is applied.

[0041] Typically, a horizontal shaft 200 is provided on each of the left and right sides of the tank body 100, and the horizontal shaft 200 is mounted on the mounting support 300 via a bearing 210.

[0042] To facilitate the connection of the slurry inlet and outlet equipment, internal thread straight connectors 130 are usually connected to the slurry inlet pipe 110 and the slurry outlet pipe 120 respectively.

[0043] Specifically, a three-piece ball valve 600 is installed on the internal thread straight connector on the grout inlet pipe 110, and the injection of grouting material during the test is controlled by the opening and closing of the three-piece ball valve.

[0044] The internal threaded straight connector on the grout outlet pipe 120 is used to seal the connection of the high-pressure hose for pressure stabilization grouting. The high-pressure hose is usually made of rubber and has a diameter of 10mm.

[0045] The intake pipe 430 is sealed to the air compressor via a pressure pipe, which is usually made of PVC hose with a diameter of 10mm.

[0046] After the grouting material is mixed by tilting the tank, it needs to be locked. To this end, the grout storage pressure tank for indoor grouting simulation tests provided by this utility model also includes a locking assembly. The locking assembly includes a pin 710 and a socket plate 720 set on the mounting base. A pin hole is opened on the horizontal axis 200. After the pin 710 passes through the pin hole, it is inserted into the socket plate 720 to fix the tank 100 and prevent it from tilting.

[0047] In practical applications, the size of the tank 100 is adjusted according to the geological conditions and model size of the grouting simulation test.

[0048] In one specific embodiment, the tank body 100 is a cylindrical steel cylinder with a height of 380mm, an outer diameter of 320mm, an inner diameter of 300mm, and a wall thickness of 10mm. The slurry inlet pipe 110 has an outer diameter of 65mm and an inner diameter of 45mm; the air inlet pipe 430 has a diameter of 20mm. The slurry outlet pipe 120 has an outer diameter of 65mm and an inner diameter of 45mm. The horizontal shaft 200 has a length of 40mm, a diameter of 10mm, and a pin hole diameter of 5mm.

[0049] This invention does not impose specific restrictions on the structure of the mounting support, as long as it can provide suspended support for the tank and allow the tank to be rotated.

[0050] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "setting," "installing," "connecting," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A grout storage pressure tank for indoor grouting simulation tests, characterized in that, The tank includes a vertical tank body, which is rotatably connected to a mounting support via a horizontally set transverse axis, and the bottom of the tank body is suspended so that the tank body can rotate around the transverse axis. The top and bottom of the tank are respectively provided with a slurry inlet pipe and a slurry outlet pipe, which are arranged vertically. An air inlet assembly is provided on one side of the slurry inlet pipe. The air intake assembly includes a protective tube, a protective valve core, and an air intake pipe. The first end of the protective tube is connected to one side of the slurry inlet pipe, and the air intake pipe is connected to one side of the protective tube. An air intake valve and a pressure gauge are installed on the air intake pipe. The protective valve core is slidably disposed inside the protective tube along its axis. The protective valve core is tightly sealed against the inner wall of the protective tube. When the protective valve core moves to the first end of the protective tube, it will block the connection between the protective tube and the tank body. When the protective valve core moves to the second end of the protective tube, it will open the connection between the protective tube and the tank body, as well as the connection between the air intake pipe and the protective tube. The second end of the protective tube is sealed with an end cap, and a threaded tube is fixed on the end cap. A valve stem is connected to the protective valve core. The valve stem passes through the protective tube from the end cap. The threaded tube is threaded onto the valve stem. The rotation of the valve stem relative to the threaded tube will drive the protective valve core to move along the axis of the protective tube.

2. The grout storage pressure tank for indoor grouting simulation tests according to claim 1, characterized in that, The horizontal axis is located in the upper middle part of the tank.

3. The grout storage pressure tank for indoor grouting simulation tests according to claim 1, characterized in that, A horizontal shaft is provided on each of the left and right sides of the tank body, and the horizontal shaft is mounted on the mounting support through a bearing seat.

4. The grout storage pressure tank for indoor grouting simulation tests according to claim 1, characterized in that, A circular handwheel is fixedly connected to the end of the horizontal shaft.

5. The grout storage pressure tank for indoor grouting simulation tests according to claim 1, characterized in that, The inlet pipe and outlet pipe are respectively connected to internal thread straight connectors.

6. The grout storage pressure tank for indoor grouting simulation tests according to claim 5, characterized in that, A three-piece ball valve is installed on the internal thread straight connector of the slurry inlet pipe.

7. The grout storage pressure tank for indoor grouting simulation tests according to claim 5, characterized in that, The internal threaded straight connector on the slurry outlet pipe is used to connect a high-pressure hose.

8. The grout storage pressure tank for indoor grouting simulation tests according to claim 1, characterized in that, The air intake pipe is connected to the air compressor via a pressure pipe.

9. The grout storage pressure tank for indoor grouting simulation tests according to claim 1, characterized in that, It also includes a locking assembly, which includes a pin and a socket plate disposed on the mounting base. The horizontal axis has a pin hole, and the pin passes through the pin hole and is inserted into the socket plate.

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