A water separable test device for testing stability of grouting slurry in sandy soil layer

Abstract

The utility model discloses a kind of water analysis test device for sand soil layer grouting slurry stability test, it is related to geotechnical engineering test equipment technical field, the device includes pressure cylinder, composite filter layer and water collecting tank, replacement mechanism and dismounting mechanism are set, the replacement mechanism includes slider and return spring driven by hand bar, by pulling hand bar slider moves along radial direction, that can realize the quick clamping or release of composite filter layer, the dismounting mechanism includes fixed in the threaded rod of water collecting tank, bolt of threaded connection and the fixed block of sliding arrangement, by screwing bolt, fixed block is clamped in the clamping groove of pressure cylinder or separated from it, the quick fixing and dismounting of water collecting tank are realized.The utility model solves the problem of tedious, time-consuming in prior art filter layer replacement and component dismounting operation, with the advantages of simple structure, convenient operation, improve test efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of geotechnical engineering testing equipment, and in particular to a water-separable testing device for testing the stability of grouting fluid in sandy soil strata. Background Technology

[0002] In grouting projects in sandy soil strata, the stability of the grout is one of the key factors determining the grouting effect. Among them, the water separation rate of the grout is an important indicator for evaluating its stability. Accurately measuring the water separation characteristics of the grout under pressure is of vital guiding significance for optimizing the grout mix ratio and predicting the grouting effect.

[0003] To accurately simulate the formation environment and quantify the water separation rate, a water separation test device is usually required. This device generally includes a pressure-resistant test cylinder for holding the slurry and applying pressure, a composite filter layer set below the test cylinder, and a water collection tank for collecting the separated liquid. The stability of the slurry can be evaluated by weighing or measuring the volume of the liquid collected in the water collection tank.

[0004] However, during the experiment, the composite filter layer needs to be replaced frequently due to clogging by slurry particles. At the same time, the water collection tank also needs to be disassembled regularly for cleaning or sampling. The design of the existing test device for filter layer replacement and water collection tank disassembly is often quite complicated. For example, the filter layer is usually fixed by a pressure plate and multiple bolts, and the water collection tank is also connected by flange bolts. This results in a lot of time being spent and special tools being used for each replacement or disassembly. This not only reduces the efficiency of the test, but also increases the cumbersomeness of the operation.

[0005] Therefore, this utility model proposes a water-separable test device for testing the stability of grout in sandy soil strata, in order to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems of cumbersome and time-consuming filter layer replacement and component disassembly operations, resulting in low test efficiency in the existing water-separable test device for testing the stability of grouting in sandy soil, this utility model aims to provide a water-separable test device with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a water-separable test device for testing the stability of grout in sandy soil strata, including a pressure-resistant test cylinder, a composite filter layer and a support component inside the pressure-resistant test cylinder, and a water collection tank; as well as a replacement mechanism and a disassembly mechanism for connecting the pressure-resistant test cylinder and the water collection tank.

[0008] The replacement mechanism includes a first slider, a second slider, a first spring, and a lever. The first slider and the second slider are symmetrically arranged on the inner wall of the pressure-resistant test cylinder and are used to engage or release the edge of the composite filter layer through their ends. The first spring provides a reset force for the first slider, and the lever is used to drive the second slider to move.

[0009] Furthermore, the disassembly mechanism includes a threaded rod fixedly connected to the water collection tank, a bolt threadedly connected to the threaded rod, and a fixing block slidably disposed on the threaded rod. The fixing block is used to engage with a slot opened on the pressure-resistant test cylinder. By turning the bolt, the fixing block can be tightened or released, thereby realizing the rapid fixing or separation of the water collection tank and the pressure-resistant test cylinder.

[0010] Preferably, the replacement mechanism further includes a first guide rod, which is fixed to the inner wall of the pressure-resistant test cylinder. The first slider has a through hole adapted to the first guide rod and is slidably sleeved on the first guide rod through the through hole. This structure can provide stable guidance for the radial movement of the first slider and prevent it from deflecting or getting stuck.

[0011] Preferably, the replacement mechanism further includes a second guide rod and a sealing ring. One end of the second guide rod is connected to the second slider, and the other end passes through the wall of the pressure-resistant test cylinder and is connected to the handle. The sealing ring is sleeved on the second guide rod and embedded in the wall of the pressure-resistant test cylinder to seal the gap between the second guide rod and the pressure-resistant test cylinder, preventing leakage during the test.

[0012] Preferably, the disassembly mechanism further includes a third spring and a fixing column. The fixing column is slidably disposed on the water collection tank. The third spring provides a thrust to the fixing column toward the fixing block. When the bolt is loosened, the fixing column can automatically push the fixing block out of the clamping state with the pressure-resistant test cylinder under the elastic force of the third spring, making the disassembly process more labor-saving and convenient.

[0013] Preferably, the water collection tank is also equipped with a drain valve, which is used to control the discharge of the liquid precipitated in the water collection tank, making it convenient for operators to take samples, weigh, or empty the water collection tank, thus increasing the functionality and ease of use of the device.

[0014] Preferably, the device further includes a sealing cap, which is detachably sealed to the top opening of the pressure-resistant test cylinder by means of threads or snaps to form a complete pressure-bearing chamber for applying test pressure to the slurry inside.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model solves the problem of the need for tools and cumbersome and time-consuming operation when replacing filter layers in the prior art by setting a replacement mechanism composed of sliders, springs and levers. It achieves the technical effect of quickly completing the filter layer clamping and releasing by hand, thus improving the efficiency of test preparation.

[0017] 2. This utility model solves the problem of complex connection between the water collection tank and the test cylinder and inconvenient disassembly and cleaning in the prior art by setting a disassembly mechanism composed of threaded rods, bolts and fixing blocks. It achieves the technical effect of quick fixing and disassembly of the water collection tank by simply turning the bolts, which facilitates equipment maintenance and cleaning.

[0018] 3. This utility model solves the problems of unstable movement and easy jamming that may exist in similar snap-fit ​​structures by adding a guide rod to guide the slider in the replacement mechanism. It achieves the technical effect of ensuring the smoothness and accuracy of the radial movement of the slider, and improving the reliability and service life of the mechanism. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a water-separable test device for testing the stability of grouting fluid in sandy soil layers, as proposed in this utility model.

[0020] Figure 2 This is a schematic diagram of the sealing cap of a water-separable test device for testing the stability of grouting fluid in sandy soil layers, as proposed in this utility model.

[0021] Figure 3 This is a schematic diagram of the sealing ring structure of a water-separable test device for testing the stability of grouting fluid in sandy soil layers, as proposed in this utility model.

[0022] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0023] Legend:

[0024] 1. Pressure test cylinder; 2. Supporting component; 3. Composite filter layer; 4. Water collection tank; 5. Drain valve; 6. Sealing cover; 7. Replacement mechanism; 701. First guide rod; 702. First spring; 703. First slider; 704. Second slider; 705. Second spring; 706. Sealing ring; 707. Second guide rod; 708. Hand lever; 8. Disassembly mechanism; 801. Bolt; 802. Fixing block; 803. Threaded rod; 804. Third spring; 805. Fixing column. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please refer to Figures 1 to 4 This utility model provides a water-separable test device for testing the stability of grout in sandy soil strata, which aims to solve the problems of cumbersome and time-consuming operation of replacing the filter layer and disassembling components in the existing test device.

[0027] like Figure 1 As shown, the water-separable test device for testing the stability of grout in sandy soil includes a pressure-resistant test cylinder 1, a composite filter layer 3 is detachably provided in the inner cavity of the pressure-resistant test cylinder 1, a support member 2 for supporting the composite filter layer 3 is also provided in the pressure-resistant test cylinder 1, the device also includes a replacement mechanism 7 for engaging or disengaging the composite filter layer 3, and a water collection tank 4 detachably connected to the bottom of the pressure-resistant test cylinder 1 via a disassembly mechanism 8.

[0028] Specifically, the replacement mechanism 7 includes a first slider 703 and a second slider 704 arranged symmetrically, and a first spring 702 and a second spring 705 that drive them respectively. The first slider 703 and the second slider 704 are slidably disposed on the inner wall of the pressure-resistant test cylinder 1 along the radial direction, and the ends of the first slider 703 and the second slider 704 are used to abut against the edge of the composite filter layer 3, thereby radially limiting and fixing the composite filter layer 3. The two ends of the first spring 702 are respectively connected to the pressure-resistant test cylinder 1 and the first slider 705. 3. The replacement mechanism 7 also includes a second guide rod 707 and a lever 708, which are used to provide an inward rebound force for the first slider 703. The second guide rod 707 passes through the wall of the pressure test cylinder 1 and is fixedly connected to the second slider 704. The lever 708 is fixedly connected to the end of the second guide rod 707 away from the second slider 704 and exposed outside the pressure test cylinder 1. The operator can drive the second guide rod 707 and the second slider 704 to move outward by pulling the lever 708.

[0029] The disassembly mechanism 8 includes a threaded rod 803 fixedly connected to the water collection tank 4, and a bolt 801 threadedly connected to the threaded rod 803. The disassembly mechanism 8 also includes a fixing block 802 slidably connected to the threaded rod 803. The fixing block 802 is used to engage with the slot opened on the pressure test cylinder 1. By tightening or loosening the bolt 801, the bolt 801 moves axially along the threaded rod 803, thereby achieving axial pressing or release of the fixing block 802, so as to achieve the purpose of quickly fixing or disassembling the water collection tank 4.

[0030] To improve the motion stability of the replacement mechanism 7, the first guide rod 701 has a cylindrical shape, with one end fixedly connected to the inner wall of the pressure-resistant test cylinder 1 and the other end pointing radially toward the center of the cylinder. The first slider 703 has a corresponding through hole that matches the outer diameter of the first guide rod 701. In the assembled state, the first slider 703 is slidably sleeved on the first guide rod 701, ensuring that the first slider 703 can stably reciprocate radially under the force of the first spring 702, avoiding deflection or jamming during the engagement or release of the composite filter layer 3, thereby improving the motion accuracy and service life of the replacement mechanism 7.

[0031] To ensure the sealing of the pressure test cylinder 1 during the pressure test, the replacement mechanism 7 also includes a sealing ring 706. Please refer to [reference needed]. Figure 3 A sealing ring 706 is annularly arranged and sleeved on the second guide rod 707. The sealing ring 706 is fixedly connected to the pressure-resistant test cylinder 1 and seals the gap between the second guide rod 707 and the cylinder wall of the pressure-resistant test cylinder 1. Specifically, the sealing ring 706 can be embedded in the through hole opened in the cylinder wall of the pressure-resistant test cylinder 1 to accommodate the second guide rod 707. Its inner ring is tightly fitted with the outer circumferential surface of the second guide rod 707, and its outer ring is tightly fitted with the inner wall of the through hole, thereby effectively preventing slurry or gas from leaking from there. One end of the second spring 705 is fixedly connected to the second slider 704, and the other end is fixedly connected to the inner wall of the pressure-resistant test cylinder 1, which is used to provide an inward rebound force for the second slider 704.

[0032] Based on the above embodiments, the present invention may further include the following preferred technical solutions:

[0033] As a preferred embodiment, to further enhance the automated reset capability and ease of operation of the disassembly mechanism 8, please refer to... Figure 4 The disassembly mechanism 8 also includes a third spring 804 and a fixing post 805. The fixing post 805 is slidably mounted on the water collection tank 4. Specifically, the water collection tank 4 has a guide hole that matches the shape of the fixing post 805. The fixing post 805 can slide along its axial direction in the guide hole. The two ends of the third spring 804 are fixedly connected to the water collection tank 4 and the fixing post 805, respectively, to provide a continuous thrust to the fixing post 805 toward the fixing block 802. The end of the fixing post 805 is used to abut against the fixing block 802. When the bolt 801 is loosened, under the elastic force of the third spring 804, the fixing post 805 will push the fixing block 802 to automatically disengage from the slot on the pressure test cylinder 1, simplifying the disassembly operation.

[0034] As another preferred embodiment, for convenient collection and discharge of liquid permeating the composite filter layer 3, please refer to... Figure 1The water collection tank 4 is equipped with a drain valve 5, which can be a conventional valve such as a ball valve or a needle valve. By operating the drain valve 5, the discharge of liquid in the water collection tank 4 can be controlled, which facilitates the sampling and analysis of the precipitated liquid.

[0035] As another preferred embodiment, in order to achieve a seal of the internal space of the pressure-resistant test cylinder 1 for pressure testing, please refer to... Figure 1 The device also includes a sealing cover 6, which is detachably sealed to the top opening of the pressure test cylinder 1 by means of threads or snaps. An air inlet valve or pressure gauge interface can be provided on the sealing cover 6 for injecting high-pressure gas into the pressure test cylinder 1 and monitoring the internal pressure.

[0036] The working principle of the water-separable test device for testing the stability of grout in sandy soil strata according to this utility model is as follows:

[0037] When the composite filter layer 3 needs to be replaced, the operator pulls the lever 708 outward. The lever 708 drives the second slider 704 to slide radially outward against the elastic force of the second spring 705 through the second guide rod 707. Since the replacement mechanism 7 is symmetrically arranged, the operator can use the other hand or a tool to push the first slider 703 outward in the same way. Alternatively, after releasing the second slider 704, the composite filter layer 3 is in a movable state. At this time, the old composite filter layer 3 can be easily removed and the new composite filter layer 3 can be inserted. After releasing the lever 708, under the action of the rebound force of the first spring 702 and the second spring 705, the first slider 703 and the second slider 704 automatically reset and re-clamp the new composite filter layer 3. The whole process does not require the use of complicated tools and is quick and convenient to operate.

[0038] When the water collection tank 4 needs to be disassembled for cleaning or maintenance, the operator first loosens the bolt 801 counterclockwise. The bolt 801 moves upward on the threaded rod 803, releasing the axial locking force on the fixing block 802. At this time, under the elastic force of the third spring 804, the fixing column 805 pushes the fixing block 802 to slide upward along the threaded rod 803, so that it automatically disengages from the locking state with the bottom slot of the pressure test cylinder 1. Then the water collection tank 4 can be directly removed. During installation, simply align the water collection tank 4 with the bottom of the pressure test cylinder 1, align the fixing block 802 with the slot, and then tighten the bolt 801 clockwise. The bolt 801 moves downward to press the fixing block 802, so that it is firmly locked into the slot, completing the quick installation.

[0039] By combining the replacement mechanism 7 and the disassembly mechanism 8, this invention solves the problem of low efficiency in test preparation and equipment maintenance caused by the complex structure of filter layer replacement and water collection tank 4 disassembly in the prior art.

Claims

1. A water-separable test device for testing the stability of grout in sandy soil strata, comprising a pressure-resistant test cylinder (1), a composite filter layer (3), and a support member (2), wherein the composite filter layer (3) is detachably disposed in the inner cavity of the pressure-resistant test cylinder (1), and the support member (2) is disposed in the pressure-resistant test cylinder (1) and is used to support the composite filter layer (3). Its features are, The device further includes: The replacement mechanism (7) for engaging or disengaging the composite filter layer (3) includes a first slider (703), a second slider (704), a first spring (702), a second spring (705), a second guide rod (707), and a handle (708). The first slider (703) and the second slider (704) are slidably disposed on the inner wall of the pressure-resistant test cylinder (1) along the radial direction of the pressure-resistant test cylinder (1) and are used to abut against the edge of the composite filter layer (3). The two ends of the first spring (702) are respectively connected to the pressure-resistant test cylinder (1) and the first slider (703). The second guide rod (707) passes through the cylinder wall of the pressure-resistant test cylinder (1) and is fixedly connected to the second slider (704). The handle (708) is fixedly connected to the exposed end of the second guide rod (707). Water collection tank (4) is detachably connected to the bottom of the pressure-resistant test cylinder (1) via a disassembly mechanism (8).

2. The water-separable test device for testing the stability of grout in sandy soil strata according to claim 1, characterized in that, The disassembly mechanism (8) includes a threaded rod (803) fixedly connected to the water collection tank (4) and a bolt (801) threadedly connected to the threaded rod (803). The disassembly mechanism (8) also includes a fixing block (802) slidably connected to the threaded rod (803). The fixing block (802) is used to engage with a slot opened on the pressure test cylinder (1).

3. The water-separable test device for testing the stability of grout in sandy soil strata according to claim 2, characterized in that, The disassembly mechanism (8) further includes a third spring (804) and a fixing column (805). The fixing column (805) is slidably disposed on the water collection tank (4). The two ends of the third spring (804) are respectively fixedly connected to the water collection tank (4) and the fixing column (805). The fixing column (805) is used to abut against the fixing block (802).

4. The water-separable test device for testing the stability of grout in sandy soil strata according to claim 1, characterized in that, The replacement mechanism (7) further includes a first guide rod (701), which is fixedly connected to the pressure-resistant test cylinder (1), and the first slider (703) is slidably sleeved on the first guide rod (701).

5. A water-separable test device for testing the stability of grout in sandy soil strata according to claim 1, characterized in that, The replacement mechanism (7) also includes a sealing ring (706), which is sleeved on the second guide rod (707). The two ends of the second spring (705) are fixedly connected to the second slider (704) and the sealing ring (706) respectively.

6. A water-separable test device for testing the stability of grout in sandy soil strata according to claim 5, characterized in that, The sealing ring (706) is fixedly connected to the pressure-resistant test cylinder (1) and seals the gap between the second guide rod (707) and the cylinder wall of the pressure-resistant test cylinder (1).

7. A water-separable test device for testing the stability of grout in sandy soil strata according to claim 1, characterized in that, The device also includes a sealing cap (6) which is removably sealed to the top opening of the pressure test cylinder (1) by means of threads or snaps.

8. A water-separable test device for testing the stability of grout in sandy soil strata according to claim 1, characterized in that, The water collection tank (4) is equipped with a drain valve (5).

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