A permeability testing device for flexible sealing materials in a stretched state

Abstract

The present invention belongs to the technical field of testing materials for gas storage construction, and provides a device for testing the permeability of a flexible sealing material in a stretched state. The device comprises a clamping assembly, the clamping assembly comprising a fixed clamping portion and a movable clamping portion, a sliding member disposed between the fixed clamping portion and the movable clamping portion for adjusting the spacing between the fixed clamping portion and the movable clamping portion, a first clamping member disposed within the fixed clamping portion for clamping one end of a flexible sealing layer test material, and a second clamping member disposed within the movable clamping portion for clamping the other end of the flexible sealing layer test material; and a testing assembly comprising a breathable support member and a sealing mechanism disposed between the first and second clamping members, the breathable support member and the sealing mechanism being used to clamp the middle portion of the flexible sealing layer test material, and a flow mechanism disposed between the breathable support member and the sealing mechanism. The present invention can test the permeability of a flexible sealing layer material for a gas storage reservoir in a stretched state, thereby resolving the problem of selecting a preferred flexible material for a gas storage reservoir.

Description

Technical Field

[0001] The invention belongs to the technical field of gas storage construction material testing, and in particular relates to a permeability testing device for a flexible sealing material in a stretched state. Background Art

[0002] Underground gas storage has attracted widespread attention at home and abroad. It is of great significance to ensuring national energy security and transformation needs and promoting the upgrading of new energy industries.

[0003] Currently, most research and practical applications of gas storage reservoirs, either domestically or internationally, use steel plates, with a small percentage using flexible sealing layer materials. However, the selection and testing of flexible sealing layer materials all use material properties in a non-stretched state, which is inconsistent with the stress characteristics of the gas storage sealing layer. Gas storage sealing layers are all in a tensile state, and the permeability in a tensile state is inconsistent with the permeability under normal conditions. Furthermore, different flexible sealing layer materials have different patterns of change. For example, a certain material may have good sealing properties and low permeability under normal conditions, but may break after stretching. Therefore, permeability testing of flexible sealing layers in a tensile state is of great significance. Summary of the Invention

[0004] The purpose of the present invention is to provide a permeability testing device for flexible sealing materials in a stretched state to solve the above problems, thereby achieving the purpose of testing the permeability of flexible sealing layer materials used in gas storage reservoirs in a stretched state and solving the problem of selecting flexible materials for gas storage reservoirs.

[0005] To achieve the above object, the present invention provides the following solution: a permeability testing device for a flexible sealing material in a stretched state, comprising:

[0006] The clamping assembly includes a fixed clamping portion and a movable clamping portion, wherein a pusher is provided between the fixed clamping portion and the movable clamping portion for adjusting the distance between the fixed clamping portion and the movable clamping portion, wherein a first clamping member for clamping one end of the flexible sealing layer test material is provided in the fixed clamping portion, and a second clamping member for clamping the other end of the flexible sealing layer test material is provided in the movable clamping portion;

[0007] The test assembly includes a breathable support member and a sealing mechanism arranged between the first clamping member and the second clamping member. The breathable support member and the sealing mechanism are used to clamp the middle part of the flexible sealing layer test material. A circulation mechanism is arranged between the breathable support member and the sealing mechanism.

[0008] Preferably, the fixed clamping portion includes a fixed end base, a first working cavity is opened on the side of the fixed end base close to the movable clamping portion, a fixed clamping block is arranged in the first working cavity, a first lifting member is arranged between the fixed clamping block and the first working cavity, and one end of the flexible sealing layer test material is clamped between the fixed clamping block and the bottom of the first working cavity.

[0009] Preferably, the first lifting member includes a first hydraulic cylinder vertically fixedly connected to the top of the first working chamber, and the telescopic end of the first hydraulic cylinder is fixedly connected to the top of the fixed clamping block.

[0010] Preferably, the mobile clamping portion includes a mobile end base, a second working chamber is opened on the side of the mobile end base close to the fixed end base, a mobile clamping block is arranged in the second working chamber, a second lifting member is arranged between the mobile clamping block and the second working chamber, and the other end of the flexible sealing layer test material is clamped between the mobile clamping block and the bottom of the second working chamber.

[0011] Preferably, the second lifting member includes a third hydraulic cylinder vertically fixedly connected to the top of the second working chamber, and the telescopic end of the third hydraulic cylinder is fixedly connected to the top of the movable clamping block.

[0012] Preferably, the pushing member includes several horizontal hydraulic cylinders, one end of each of the horizontal hydraulic cylinders is fixedly connected to the side wall of the fixed end base close to the movable end base, and the other end of each of the horizontal hydraulic cylinders is fixedly connected to the side wall of the movable end base.

[0013] Preferably, the breathable support member includes a breathable rigid body, which is detachably connected to the bottom of the first working chamber, and the breathable rigid body is located on the side of the fixed clamping block close to the movable clamping block, and the sealing mechanism is arranged corresponding to the breathable rigid body.

[0014] Preferably, the sealing mechanism includes a second hydraulic cylinder vertically fixedly connected to the top of the first working chamber, the telescopic end of the second hydraulic cylinder is fixedly connected to a sealing clamping block, and a groove is provided at the bottom of the sealing clamping block, and the groove is adapted to the breathable rigid body.

[0015] Preferably, the bottom of the sealing clamping block and the bottom of the first working chamber are respectively fixedly connected with sealing gaskets, and openings are provided in the middle of the two groups of sealing gaskets, and the edges of the grooves and the breathable rigid body are respectively fitted with the edges of the openings on the two groups of sealing gaskets.

[0016] Preferably, the circulation mechanism includes an air inlet opened on the side wall of the sealing clamping block and an air outlet opened on the side wall of the fixed end base, the air inlet is connected to the groove at the bottom of the sealing clamping block, and the air outlet is connected to the bottom of the breathable rigid body, and the air inlet and air outlet are respectively connected to a pressure gauge.

[0017] Compared with the prior art, the present invention has the following advantages and technical effects: Overall, the present invention can stretch the flexible sealing layer test material to a set length before testing by setting a fixed clamping part and a movable clamping part, and at the same time, a breathable support part and a sealing mechanism are coupled between the fixed clamping part and the movable clamping part. When the flexible sealing layer test material is in a stretched state, the middle part thereof is sealed and clamped to form a test space, thereby realizing the permeability test of the flexible sealing layer test material in a stretched state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 is a top view of the testing device of the present invention;

[0020] Figure 2 for Figure 1 AA cross-section in;

[0021] Figure 3 for Figure 2 BB cross-section diagram in;

[0022] Figure 4 for Figure 3 CC cross-section diagram in;

[0023] Among them, 1. Flexible sealing layer test material; 2. Sealing gasket; 3. Breathable rigid body; 4. Fixed clamping block; 5. Sealing clamping block; 6. Mobile clamping block; 7. First hydraulic cylinder; 8. Second hydraulic cylinder; 9. Third hydraulic cylinder; 10. Air inlet; 11. Air outlet; 12. Slidable connecting rod; 13. Mobile end base; 14. Fixed end base; 15. Horizontal hydraulic cylinder. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Reference Figures 1-4 The present invention provides a permeability testing device for a flexible sealing material in a stretched state, comprising:

[0027] The clamping assembly includes a fixed clamping portion and a movable clamping portion. A pusher is provided between the fixed clamping portion and the movable clamping portion for adjusting the distance between the fixed clamping portion and the movable clamping portion. A first clamping member for clamping one end of the flexible sealing layer test material 1 is provided in the fixed clamping portion, and a second clamping member for clamping the other end of the flexible sealing layer test material 1 is provided in the movable clamping portion.

[0028] The test assembly includes a breathable support member and a sealing mechanism arranged between the first clamping member and the second clamping member. The breathable support member and the sealing mechanism are used to clamp the middle part of the flexible sealing layer test material 1. A circulation mechanism is arranged between the breathable support member and the sealing mechanism.

[0029] The main functions of the first clamping member and the second clamping member are to clamp the two ends of the flexible sealing layer test material 1; the main function of the pushing member is to push the movable clamping part away from the fixed clamping part, so that the second clamping member is away from the first clamping member, so as to achieve the purpose of stretching the flexible sealing layer test material 1; the main function of the sealing mechanism is to clamp the flexible sealing layer test material 1 between the breathable support member and the sealing mechanism by moving toward the breathable support member, forming a sealed space for testing above the breathable support member, and placing the flexible sealing layer test material 1 in the sealed space; the main function of the breathable support member is to support the flexible sealing layer test material 1 and ensure the permeation of gas during the test; the main function of the circulation mechanism is to allow the test gas to penetrate the flexible sealing layer test material 1 from top to bottom to test the permeability. Overall, the present invention can stretch the flexible sealing layer test material to a set length before testing by setting a fixed clamping part and a movable clamping part. At the same time, a breathable support member and a sealing mechanism are coupled between the fixed clamping part and the movable clamping part. When the flexible sealing layer test material is in a stretched state, the middle part thereof is sealed and clamped to form a test space, thereby realizing the permeability test of the flexible sealing layer test material in a stretched state.

[0030] A further optimized solution is provided, in which the fixed clamping part includes a fixed end base 14, a first working chamber is opened on the side of the fixed end base 14 close to the movable clamping part, a fixed clamping block 4 is arranged in the first working chamber, a first lifting member is arranged between the fixed clamping block 4 and the first working chamber, and one end of the flexible sealing layer test material 1 is clamped between the fixed clamping block 4 and the bottom of the first working chamber.

[0031] like Figure 1 As shown, the front of the first working chamber and the side close to the movable clamping part are both opened, which can ensure that the two ends of the flexible sealing layer test material are respectively in the fixed end base 14 and the movable clamping part, while also providing a convenient operating space for the operator.

[0032] As a further optimization solution, anti-slip bumps are respectively provided on the bottom of the fixed clamping block 4 and the bottom of the first working cavity, and the anti-slip bump area at the bottom of the first working cavity corresponds to the fixed clamping block 4 .

[0033] In a further optimized solution, the first lifting member includes a first hydraulic cylinder 7 vertically fixedly connected to the top of the first working chamber, and the telescopic end of the first hydraulic cylinder 7 is fixedly connected to the top of the fixed clamping block 4.

[0034] like Figure 1 As shown, the extension of the telescopic end of the first hydraulic cylinder 7 can move the fixed clamping block 4 toward the bottom of the first working chamber, clamping the left end of the flexible sealing layer test material between the fixed clamping block 4 and the bottom of the first working chamber, and the anti-slip protrusion can improve the firmness of the clamping.

[0035] A further optimized solution is provided in which the mobile clamping portion includes a mobile end base 13, a second working chamber is opened on the side of the mobile end base 13 close to the fixed end base 14, a mobile clamping block 6 is provided in the second working chamber, a second lifting member is provided between the mobile clamping block 6 and the second working chamber, and the other end of the flexible sealing layer test material 1 is clamped between the mobile clamping block 6 and the bottom of the second working chamber.

[0036] like Figure 1 As shown, the front of the second working chamber and one side close to the fixed end base 14 are both opened, providing a convenient operating space for the operator.

[0037] In a further optimized solution, the second lifting member includes a third hydraulic cylinder 9 vertically fixedly connected to the top of the second working chamber, and the telescopic end of the third hydraulic cylinder 9 is fixedly connected to the top of the movable clamping block 6.

[0038] As a further optimization solution, anti-slip bumps are respectively provided on the bottom of the movable clamping block 6 and the bottom of the second working chamber, and the anti-slip bump area at the bottom of the second working chamber corresponds to the movable clamping block 6 .

[0039] like Figure 1As shown, the extension of the telescopic end of the third hydraulic cylinder 9 can move the movable clamping block 6 toward the bottom of the second working chamber, clamping the right end of the flexible sealing layer test material between the movable clamping block 6 and the bottom of the second working chamber.

[0040] Further optimization scheme, such as Figure 3 and Figure 4 As shown, slidable connecting rods 12 are vertically fixedly connected to both sides of the mobile end base 13, and the mobile clamping block 6 is slidably sleeved between the two slidable connecting rods 12. The slidable connecting rods 12 play a guiding role for the sliding of the mobile clamping block 6.

[0041] A further optimized solution is that the pushers include several horizontal hydraulic cylinders 15 , one end of which is fixedly connected to the side wall of the fixed end base 14 close to the movable end base 13 , and the other end of which is fixedly connected to the side wall of the movable end base 13 .

[0042] As a further optimization solution, a displacement sensor (not shown in the figure) is provided between the fixed end base 14 and the movable end base 13 to monitor the distance between the movable end base 13 and the fixed end base 14 .

[0043] like Figure 2 and Figure 4 As shown, in this embodiment, four groups of horizontal hydraulic cylinders 15 are provided, and the stretching displacement and tension are controlled by the horizontal hydraulic cylinders 15 .

[0044] According to a further optimized solution, the breathable support member includes a breathable rigid body 3, which is detachably connected to the bottom of the first working chamber, and the breathable rigid body 3 is located on the side of the fixed clamping block 4 close to the movable clamping block 6, and the sealing mechanism is arranged corresponding to the breathable rigid body 3.

[0045] In this embodiment, a placement slot is provided at the bottom of the first working chamber, and the air-permeable rigid body 3 is placed in the placement slot. The air-permeable rigid body 3 is a replaceable component. In this embodiment, the air-permeable rigid body 3 is set to be rectangular to reduce the difficulty of calculating the area.

[0046] A further optimized solution is that the sealing mechanism includes a second hydraulic cylinder 8 vertically fixedly connected to the top of the first working chamber, the telescopic end of the second hydraulic cylinder 8 is fixedly connected to a sealing clamping block 5, and a groove is provided at the bottom of the sealing clamping block 5, which is adapted to the breathable rigid body 3.

[0047] To further optimize the solution, the bottom of the sealing clamping block 5 and the bottom of the first working chamber are respectively fixedly connected with sealing gaskets 2, openings are provided in the middle of the two groups of sealing gaskets 2, and the edges of the grooves and the breathable rigid body 3 are respectively fitted with the edges of the openings on the two groups of sealing gaskets 2.

[0048] like Figure 3 and Figure 4As shown, the second hydraulic cylinder 8 drives the sealing clamping block 5 to move downward, and is arranged on the breathable rigid body 3 through a groove to seal the middle part of the flexible sealing layer test material 1 therein, forming a test space, and performing a permeability test on the middle position of the flexible sealing layer test material 1 when the flexible sealing layer test material 1 is in a stretched state.

[0049] As a further optimization solution, the sealing gasket 2 can be composed of one or more layers, and the boundary of its internal opening coincides with the boundary of the breathable rigid body 3 to ensure the accuracy of the calculated area.

[0050] To further optimize the solution, the circulation mechanism includes an air inlet 10 opened on the side wall of the sealing clamping block 5 and an air outlet 11 opened on the side wall of the fixed end base 14. The air inlet 10 is connected to the groove at the bottom of the sealing clamping block 5, and the air outlet 11 is connected to the bottom of the breathable rigid body 3. The air inlet 10 and the air outlet 11 are respectively connected to a pressure gauge or a flow meter.

[0051] like Figure 1 As shown, an external air pump is connected to the air inlet 10, which inflates the test space formed by the sealing clamping block 5 and the air-permeable rigid body 3. The air is then passed through the flexible sealing layer test material and the air-permeable rigid body 3 and discharged from the air outlet 11. The permeability of the material can be calculated by using the pressure gradient between the pressure measured at the air inlet 10 and the air outlet 11.

[0052] The test operation steps of this embodiment are as follows:

[0053] 1. Place the two ends of the flexible sealing layer test material 1 in the first working chamber and the second working chamber, respectively, and under the fixed clamping block 4 and the movable clamping block 6, respectively. Control the first hydraulic cylinder 7 and the third hydraulic cylinder 9 so that the fixed clamping block 4 and the movable clamping block 6 clamp the two ends of the flexible sealing layer test material 1.

[0054] 2. Control the horizontal hydraulic cylinder 15 to extend, increase the distance between the fixed end base 14 and the movable end base 13, and place the flexible sealing layer test material 1 in the desired tensile state.

[0055] 3. Control the second hydraulic cylinder 8 to lower the sealing clamping block 5 and seal the middle part of the flexible sealing layer test material 1 between the breathable rigid body 3 and the groove at the bottom of the sealing clamping block 5.

[0056] 4. Start the air pump and calculate the permeability of the material by measuring the pressure at the air inlet 10 and the air outlet 11 using the pressure gradient between the two.

[0057] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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 therefore cannot be understood as a limitation on the present invention.

[0058] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A permeability testing device for a flexible sealing material in a stretched state, characterized in that: include: A clamping assembly comprises a fixed clamping portion and a movable clamping portion, wherein a pusher is provided between the fixed clamping portion and the movable clamping portion for adjusting the distance between the fixed clamping portion and the movable clamping portion, wherein a first clamping portion is provided in the fixed clamping portion for clamping one end of a flexible sealing layer test material (1), and a second clamping portion is provided in the movable clamping portion for clamping the other end of the flexible sealing layer test material (1); A test assembly comprising a breathable support member and a sealing mechanism arranged between the first clamping member and the second clamping member, wherein the breathable support member and the sealing mechanism are used to clamp the middle portion of the flexible sealing layer test material (1), and a flow mechanism is arranged between the breathable support member and the sealing mechanism; The fixed clamping portion comprises a fixed end base (14), a first working cavity is provided on a side of the fixed end base (14) close to the movable clamping portion, a fixed clamping block (4) is provided in the first working cavity, a first lifting member is provided between the fixed clamping block (4) and the first working cavity, and one end of the flexible sealing layer test material (1) is clamped between the fixed clamping block (4) and the bottom of the first working cavity; The movable clamping portion comprises a movable end base (13), a second working cavity is provided on a side of the movable end base (13) close to the fixed end base (14), a movable clamping block (6) is provided in the second working cavity, a second lifting member is provided between the movable clamping block (6) and the second working cavity, and the other end of the flexible sealing layer test material (1) is clamped between the movable clamping block (6) and the bottom of the second working cavity; The breathable support member comprises a breathable rigid body (3), the breathable rigid body (3) is detachably connected to the bottom of the first working chamber, and the breathable rigid body (3) is located on a side of the fixed clamping block (4) close to the movable clamping block (6), and the sealing mechanism is arranged corresponding to the breathable rigid body (3); The sealing mechanism comprises a second hydraulic cylinder (8) vertically fixedly connected to the top of the first working chamber, the telescopic end of the second hydraulic cylinder (8) is fixedly connected to a sealing clamping block (5), and the bottom of the sealing clamping block (5) is provided with a groove, and the groove is adapted to the air-permeable rigid body (3); The bottom of the sealing clamping block (5) and the bottom of the first working chamber are respectively fixedly connected with sealing gaskets (2), and the middle parts of the two groups of sealing gaskets (2) are provided with openings, and the edges of the groove and the breathable rigid body (3) are respectively fitted with the edges of the openings on the two groups of sealing gaskets (2).

2. The permeability testing device for a flexible sealing material in a stretched state according to claim 1, characterized in that: The first lifting member comprises a first hydraulic cylinder (7) vertically fixedly connected to the top of the first working chamber, and the telescopic end of the first hydraulic cylinder (7) is fixedly connected to the top of the fixed clamping block (4).

3. The permeability testing device for a flexible sealing material in a stretched state according to claim 1, characterized in that: The second lifting member comprises a third hydraulic cylinder (9) vertically fixedly connected to the top of the second working chamber, and the telescopic end of the third hydraulic cylinder (9) is fixedly connected to the top of the movable clamping block (6).

4. The permeability testing device for a flexible sealing material in a stretched state according to claim 1, characterized in that: The push member comprises a plurality of horizontal hydraulic cylinders (15), one end of each of the plurality of horizontal hydraulic cylinders (15) is fixedly connected to a side wall of the fixed end base (14) close to the movable end base (13), and the other end of each of the plurality of horizontal hydraulic cylinders (15) is fixedly connected to the side wall of the movable end base (13).

5. The permeability testing device for a flexible sealing material in a stretched state according to claim 1, characterized in that: The circulation mechanism includes an air inlet (10) provided on the side wall of the sealing clamping block (5) and an air outlet (11) provided on the side wall of the fixed end base (14), wherein the air inlet (10) is connected to the groove at the bottom of the sealing clamping block (5), and the air outlet (11) is connected to the bottom of the breathable rigid body (3), and the air inlet (10) and the air outlet (11) are respectively connected to a pressure gauge.

Images