A testing device and method for measuring the compression water absorption rate of a buffer stop block

Abstract

The present invention provides a test device for the compression water absorption rate of a buffer stop block, which includes a sample assembly, a liquid containing assembly, a support frame, a lifting assembly and an auxiliary assembly; the support frame is divided into three layers by a lower fixing plate, a middle moving plate and an upper fixing plate, and is supported and fixed by columns. The liquid containing tank is placed on the middle moving plate, and a lower support is fixedly arranged at the bottom of the liquid containing tank. An upper support is arranged on the lower bottom surface of the upper fixing plate. The sample assembly is placed between the lower support and the upper support; the lifting assembly is fixed on the upper surface of the lower fixing plate and pushes the middle moving plate to move between the lower fixing plate and the upper fixing plate to squeeze the sample assembly. The device provided by the present invention is simple to operate, low in cost, visible and controllable, and can accurately complete the test of the compression water absorption rate of the buffer stop block compressed to the specified height H and placed for the specified time T.

Description

Technical Field

[0001] The present invention relates to the technical field of buffer stop block measurement, and particularly to a test device for measuring the compression water absorption rate of a buffer stop block. Background Art

[0002] During the operation of the buffer stop block, it is often exposed to water or a humid environment, and the water absorption performance is required to characterize the performance of the buffer stop block during operation in water or a humid environment.

[0003] Among the parameters for characterizing water absorption performance, the water absorption rate is an important index. The water absorption rate refers to the ability of a plastic to absorb water under standard atmospheric pressure. It is closely related to the microscopic structure of the material and is therefore also an important index reflecting the product performance.

[0004] Specifically, the water absorption rate is measured for the water absorbed by the plastic and expressed as a percentage. In the usual temperature range, the water absorption rate of the plastic is determined by factors such as the number of voids, the size of the voids, the arrangement of particles, the amount of molecular movement, the presence or absence of polar groups in the main chain, and the water resistance of the plastic.

[0005] The conventional method for testing the water absorption rate is to pass bolts through both ends of the buffer stop block, set screws at both ends, and tighten the screws at both ends to perform the compression water absorption rate test. The existing device is simple and low-cost, but has a large operation difficulty. Moreover, it cannot accurately reflect the water absorption performance of the material under the actual working conditions of the buffer stop block.

[0006] Therefore, providing a technical solution that can accurately measure the compression water absorption rate of the buffer stop block and is easy to operate is an important research direction. Summary of the Invention

[0007] The present invention aims at the defects of the prior art and provides a test device for measuring the compression water absorption rate of a buffer stop block.

[0008] The present invention adopts the following technical solutions to solve the above technical problems:

[0009] In a first aspect, the present invention provides a test device for measuring the compression water absorption rate of a buffer stop block, including a sample assembly, a liquid holding assembly, a support frame, a lifting assembly, and an auxiliary assembly; wherein,

[0010] The support frame is divided into three layers by a lower fixing plate, a middle moving plate, and an upper fixing plate, and is supported and fixed by columns. The liquid holding tank is placed on the middle moving plate, a lower support is fixedly arranged at the bottom of the liquid holding tank, and an upper support is arranged on the lower bottom surface of the upper fixing plate. The sample assembly is placed between the lower support and the upper support;

[0011] The lifting assembly is fixed on the upper surface of the lower fixed plate, and pushes the middle moving plate to move between the lower fixed plate and the upper fixed plate to squeeze the sample assembly.

[0012] Preferably, the sample assembly includes a screw rod, a bottom gasket, a bottom fixing screw, a top gasket and a top fixing screw; both ends of the screw rod are fixed to the bottom fixing screw and the top fixing screw by threads; the bottom gasket and the top gasket are arranged on the screw rod between the bottom fixing screw and the top fixing screw to axially fix the buffer stop block on the screw rod.

[0013] Preferably, the lower fixed plate and the upper fixed plate are respectively fixed at both ends of the four columns, and fixing holes are provided at the four corners of the middle moving plate, and the columns pass through the fixing holes.

[0014] Preferably, the lower surface of the upper bracket contacts the upper surface of the top gasket, and the upper surface of the lower bracket contacts the lower surface of the bottom gasket.

[0015] Preferably, the lifting assembly is a jack or a lead screw.

[0016] Preferably, the power source of the lifting assembly is hydraulic pressure, pneumatic pressure or electric power.

[0017] Preferably, a scale is provided on the column.

[0018] Preferably, it includes a pressure sensor.

[0019] Preferably, the material of the liquid-containing assembly is one or more of metal materials, non-metal materials, and polymer materials.

[0020] Preferably, the shape of the liquid-containing tank is circular or rectangular.

[0021] In a second aspect, the present invention provides a method for testing the compression water absorption rate of a buffer stop block using the above device, including the following steps:

[0022] Step S1: Measure the mass m1 and height of the dry buffer stop block.

[0023] Step S2: After threading the buffer stop block, the bottom gasket, the bottom fixing screw, the top gasket and the top fixing screw on the screw rod, place them upright in the liquid-containing tank and add water to submerge the sample assembly.

[0024] Step S3: Raise the middle moving plate until the lower surface of the upper bracket contacts the upper surface of the top gasket, and the upper surface of the lower bracket contacts the lower surface of the bottom gasket, and adjust the zero point of the scale to be consistent with the position of the middle moving plate.

[0025] Step S4: Continuously raise the middle moving plate until it reaches the test required height, and let it stand for a certain period of time;

[0026] Step S5: Lower it to the fully relaxed state, remove the sample assembly, remove the buffer stop block, dry the surface moisture, and measure the mass m2 of the dried buffer stop block;

[0027] The water absorption rate W of the buffer stop block = (m2 - m1) / m1 × 100%.

[0028] Adopting the above technical solutions, compared with the prior art, the present invention has the following technical effects:

[0029] The present invention provides a device for testing the compression water absorption rate of a buffer stop block. After combining the buffer stop block with the sample assembly, it is placed in a liquid storage tank and positioned between the upper bracket and the lower bracket, and is compressed to the height meeting the test requirements by using a lifting assembly. The device provided by the present invention is simple to operate, low in cost, visible and controllable, and can accurately complete the test of the compression water absorption rate of the buffer stop block compressed to a specified height and placed for a specified time T. Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of a device for testing the compression water absorption rate of a buffer stop block according to the present invention;

[0031] Figure 2 is a cross-sectional view of a device for testing the compression water absorption rate of a buffer stop block according to the present invention at the initial position;

[0032] Figure 3 is a cross-sectional view of a device for testing the compression water absorption rate of a buffer stop block according to the present invention lifted to the target height;

[0033] Figure 4 is a schematic structural diagram of the sample assembly at the initial height;

[0034] Figure 5 is a schematic structural diagram of the sample assembly lifted to the target height;

[0035] Figure 6 is a top view of the sleeve;

[0036] Figure 7 is Figure 6 the sectional view taken along line A-A in

[0037] Description of the reference numerals:

[0038] 1 - Sample assembly, 11 - Buffer stop block, 12 - Screw, 13 - Bottom gasket, 14 - Bottom fixing screw, 15 - Top gasket, 16 - Top fixing screw,

[0039] 2 - Liquid holding assembly, 21 - Lower bracket, 22 - Liquid holding tank,

[0040] 3 - Support frame, 31 - Column, 32 - Lower fixing plate, 33 - Middle moving plate, 34 - Upper fixing plate,

[0041] 4 - Lifting assembly, 41 - Jack, 42 - Lifting handle,

[0042] 5 - Auxiliary assembly, 51 - Upper bracket, 52 - Sleeve. Detailed implementation mode

[0043] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings.

[0044] Example 1:

[0045] Please refer to Figure 1 As shown, this example provides a buffer stop block compression water absorption rate testing device, including a sample assembly 1, a liquid holding assembly 2, a support frame 3, a lifting assembly 4, and an auxiliary assembly 5.

[0046] Specifically, as shown in Figures 2 - 5 In it, the sample assembly 1 includes a screw 12, a bottom gasket 13, a bottom fixing screw 14, a top gasket 15, and a top fixing screw 16. Both ends of the screw 12 are fixed to the bottom fixing screw 14 and the top fixing screw 16 by threads; a bottom gasket 13 and a top gasket 15 are provided on the screw 12 between the bottom fixing screw 14 and the top fixing screw 16, and the buffer stop block 11 is axially fixed on the screw 12 through the bottom gasket 13 and the top gasket 15. The sample assembly 1 is placed between the lower bracket 21 and the upper bracket 51.

[0047] Specifically, as shown in Figures 2 - 3 In it, the liquid holding assembly 2 includes a lower bracket 21 and a liquid holding tank 22. The lower bracket 21 is fixed on the inner bottom surface of the liquid holding tank 22. Further, the lower bracket 21 is annular, the lower end of the screw 12 and the bottom fixing screw 14 are inserted into the lower bracket 21, and the upper surface of the lower bracket 21 contacts the lower surface of the bottom gasket 13.

[0048] Specifically, as shown in Figures 2 - 3 In it, the support frame 3 is divided into three layers by a lower fixing plate 32, a middle moving plate 33, and an upper fixing plate 34, and is supported and fixed by columns 31. Further, the lower fixing plate 32 and the upper fixing plate 34 are respectively fixed at both ends of the four columns 31, and fixing holes are provided at the four corners of the middle moving plate 33, and the columns 31 pass through the fixing holes.

[0049] Specifically, as shown in Figures 2 - 3In the [device], the liquid storage tank 22 is placed on the middle moving plate 33, and an upper support 51 is provided on the lower bottom surface of the upper fixing plate 34. Further, the upper support 51 is annular, the upper end of the screw 12 and the top fixing screw 16 are inserted into the upper support 51, and the lower surface of the upper support 51 contacts the upper surface of the top gasket 15.

[0050] In one embodiment, a pressing port is provided at a position of the upper fixing plate 34 corresponding to the inside of the upper support 51.

[0051] Specifically, as Figures 2 - 3 shown in [figure], the lifting assembly 4 is fixed on the upper surface of the lower fixing plate 32, and the middle moving plate 33 is pushed to move between the lower fixing plate 32 and the upper fixing plate 34 to squeeze the sample assembly 1.

[0052] In this embodiment, a scale is provided on the column 31. The rising height of the lifting assembly 4 is shown.

[0053] In this embodiment, a pressure sensor is further included.

[0054] In this embodiment, the lifting assembly 4 is a jack.

[0055] In one embodiment, the power source of the lifting assembly 4 is hydraulic pressure, pneumatic pressure or electric power.

[0056] Classified by time, there are generally two types of compression water absorption tests, namely short-term (e.g., 5 min) and long-term (e.g., 48 h). In one embodiment of the long-term test, as Figures 6 - 7 shown in [figure], a sleeve 52 is further included. A sink is provided at the low end of the sleeve 52, and the wall surface of the sink fits the shape of the top fixing screw 16. A rotating handle is provided at the upper end of the sleeve 52, and the operator applies a force to the top fixing screw 16 through the rotating handle. As Figure 1 shown in [figure], a pressing port is provided at a position of the upper fixing plate 34 corresponding to the inside of the upper support 51, and the lower part of the sleeve 52 passes through the pressing port and then cooperates with the top fixing screw 16.

[0057] Embodiment 2:

[0058] This Embodiment 2 provides a short-term test method for the compression water absorption of the buffer stop block using the device in Embodiment 1, including the following steps:

[0059] Step S1: Measure the mass m1 and height H1 of the dry buffer stop block;

[0060] Step S2: As Figure 4In [description], the buffer stop block 11, bottom gasket 13, bottom fixing screw 14, top gasket 15 and top fixing screw 16 are threaded onto the screw rod 12. The sample assembly 1 is placed upright in the liquid holding tank 22, between the lower bracket 21 and the upper bracket 51. Water is added to submerge the sample assembly 1. As Figure 5 In [description], the displayed value of the pressure sensor is 0 at this time;

[0061] Step S3: Use the lifting assembly 4 to raise the middle moving plate 33 until the lower surface of the upper bracket 51 contacts the upper surface of the top gasket 15, and the upper surface of the lower bracket 21 contacts the lower surface of the bottom gasket 13. Adjust the zero point of the scale to be consistent with the position of the middle moving plate 33;

[0062] Step S4: Use the lifting assembly 4 to continue raising the middle moving plate 33 until it reaches the test required height, which is the compression height H2, and the compression distance is (H1 - H2). The lifting assembly 4 is left stationary for a certain time T, and the pressure value is recorded;

[0063] Step S5: Maintain for 5 min. Use the lifting assembly 4 to lower to the fully relaxed state, remove the sample assembly 1, remove the buffer stop block 11, dry the surface moisture, and measure the mass m2 of the dried buffer stop block 11.

[0064] The water absorption rate W of the buffer stop block = (m2 - m1) / m1 × 100%.

[0065] The compression rate at this time = (H1 - H2) / H1 × 100%.

[0066] Example 3:

[0067] This Example 2 provides a long-term test method for the compression water absorption rate of the buffer stop block using the device in Example 1, including the following steps:

[0068] Step S1: Measure the mass m1 and height H1 of the dried buffer stop block;

[0069] Step S2: As Figure 4 In [description], the buffer stop block 11, bottom gasket 13, bottom fixing screw 14, top gasket 15 and top fixing screw 16 are threaded onto the screw rod 12. The sample assembly 1 is placed upright in the liquid holding tank 22, between the lower bracket 21 and the upper bracket 51. Water is added to submerge the sample assembly 1. As Figure 5 In [description], the displayed value of the pressure sensor is 0 at this time;

[0070] Step S3: Use the lifting assembly 4 to raise the middle moving plate 33 until the lower surface of the upper bracket 51 contacts the upper surface of the top gasket 15, and the upper surface of the lower bracket 21 contacts the lower surface of the bottom gasket 13. Adjust the zero point of the scale to be consistent with the position of the middle moving plate 33;

[0071] Step S4: Use the lifting component 4 to continue raising the middle moving plate 33 until it reaches the test required height, which is the compression height H2, and the compression distance is (H1 - H2). The lifting component 4 stands still for a certain period of time T, and record the pressure value;

[0072] Step S4: The lower part of the sleeve 52 passes through the top pressing port and cooperates with the top fixing screw 16. The staff applies a force to the top fixing screw 16 by rotating the handle of the sleeve 52 to fix it in place. Remove the sleeve 52, use the lifting component 4 to lower the middle moving plate 33. The sample component 1 remains in a compressed state. Remove the sample component 1 and the liquid storage tank 22, and the support frame 3 can continue with the compression work of the next sample;

[0073] Step S5: Keep the sample component 1 and the liquid storage tank 22 in a compressed state for 48 hours. Place the sample component 1 and the liquid storage tank 22 between the middle moving plate 33 and the upper support 51. The top gasket 15 contacts the upper support 51, and the liquid storage tank 22 is placed on the middle moving plate 33. The staff applies a force to the top fixing screw 16 by rotating the handle of the sleeve 52 to remove the top fixing screw 16. Use the lifting component 4 to lower to the fully relaxed state, remove the sample component 1 and the liquid storage tank 22, remove the buffer stop block 11, dry the surface moisture, and measure the mass m2 of the dried buffer stop block 11.

[0074] The water absorption rate W of the buffer stop block = (m2 - m1) / m1 × 100%.

[0075] The compression ratio at this time = (H1 - H2) / H1 × 100%.

[0076] Comparative example:

[0077] In the comparative example, the buffer stop block, the screw, and the screw are assembled, placed in water, fixed underwater, and a wrench is used at each end to tighten forcefully until the test requirements are met.

[0078] Tightening the screw underwater is very difficult to operate. As the compression pressure increases later, the operation becomes even more difficult.

[0079] The specific embodiments of the present invention have been described in detail above, but they are only examples, and the present invention is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to the invention are also within the scope of the present invention. Therefore, equivalent transformations and modifications made without departing from the spirit and scope of the present invention should be covered within the scope of the present invention.

Claims

1. A testing device for the compression water absorption rate of a buffer stop block, characterized in that, It includes a sample assembly (1), a liquid-containing assembly (2), a support frame (3), a lifting assembly (4) and an auxiliary assembly (5); among them, the support frame (3) is divided into three layers by a lower fixing plate (32), a middle moving plate (33) and an upper fixing plate (34), and is supported and fixed by columns (31); a liquid-containing tank (22) is placed on the middle moving plate (33), a lower bracket (21) is fixedly arranged at the bottom of the liquid-containing tank (22), an upper bracket (51) is arranged on the lower bottom surface of the upper fixing plate (34), and the sample assembly (1) is placed between the lower bracket (21) and the upper bracket (51); the lifting assembly (4) is fixed on the upper surface of the lower fixing plate (32), and pushes the middle moving plate (33) to move between the lower fixing plate (32) and the upper fixing plate (34) to extrude the sample assembly (1).

2. The buffer stop block compression water absorption rate testing device according to claim 1, characterized in that, The sample assembly (1) includes a screw (12), a bottom gasket (13), a bottom fixing screw (14), a top gasket (15) and a top fixing screw (16); both ends of the screw (12) are fixed to the bottom fixing screw (14) and the top fixing screw (16) by threads; the bottom gasket (13) and the top gasket (15) are arranged on the screw (12) between the bottom fixing screw (14) and the top fixing screw (16) to axially fix the buffer stop block (11) on the screw (12).

3. The buffer stop block compression water absorption rate testing device according to claim 2, characterized in that, The lower fixing plate (32) and the upper fixing plate (34) are respectively fixed at both ends of the four columns (31), and fixing holes are provided at the four corners of the middle moving plate (33), and the columns (31) pass through the fixing holes.

4. The buffer stop block compression water absorption rate testing device according to claim 2, characterized in that, The lower surface of the upper bracket (51) contacts the upper surface of the top gasket (15), and the upper surface of the lower bracket (21) contacts the lower surface of the bottom gasket (13).

5. The buffer stop block compression water absorption rate testing device according to claim 2, wherein The lifting assembly (4) is a jack or a lead screw.

6. The buffer stop block compression water absorption rate testing device according to claim 2, characterized in that, The power source of the lifting assembly (4) is hydraulic pressure, air pressure or electric power.

7. The buffer stop block compression water absorption rate testing device according to claim 2, wherein A scale is provided on the column (31).

8. The buffer stop block compression water absorption rate testing device according to claim 2, characterized in that, It includes a pressure sensor.

9. The buffer stop block compression water absorption rate testing device according to claim 2, characterized in that, The material of the liquid-containing assembly (2) is one or more of metal materials, non-metal materials, and polymer materials.

10. A method for testing the compression water absorption rate of a buffer stop block, using the device according to any one of claims 2-9, characterized in that, It includes the following steps: Step S1: Measure the mass m1 and height of the dry buffer stop block (11). Step S2: After threading the buffer stop block (11), the bottom gasket (13), the bottom fixing screw (14), the top gasket (15) and the top fixing screw (16) on the screw (12), place them upright in the liquid-containing tank (22), and add water to submerge the sample assembly (1). Step S3: Raise the middle moving plate (33) until the lower surface of the upper bracket (51) contacts the upper surface of the top gasket (15), and the upper surface of the lower bracket (21) contacts the lower surface of the bottom gasket (13), and adjust the zero point of the scale to be consistent with the position of the middle moving plate (33). Step S4: Continuously raise the middle moving plate (33) until it reaches the test required height and stand still for a certain period of time; Step S5: Lower to the fully relaxed state, remove the sample assembly (1), remove the buffer stop block (11), dry the surface moisture, and measure the mass m2 of the dried buffer stop block (11); The water absorption rate W of the buffer stop block (11) = (m2 - m1) / m1 × 100%.

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