A height-adjusting support

Abstract

The present invention discloses a height-adjustable bearing, which includes an upper seat plate assembly, an intermediate assembly, a lower seat plate assembly and a force-measuring assembly. Among them, the upper seat plate assembly includes an upper bearing plate, the intermediate assembly includes an intermediate lining plate, and the lower seat plate assembly includes a lifting spherical segment and a bottom basin. An adjusting medium is filled in the medium cavity between the lifting spherical segment and the bottom basin. The adjusting medium is filled into the medium cavity through the medium inlet, and the lifting spherical segment is jacked up by the adjusting medium. The lifting spherical segment, the upper seat plate assembly and the intermediate assembly slide relative to the bottom basin to achieve the purpose of adjusting the height of the bearing. The lifting spherical segment is jacked up by the adjusting medium, realizing stepless adjustment and improving the convenience of bearing adjustment. At the same time, a force-measuring assembly is provided, which can monitor the pressure of the adjusting medium in the medium cavity and the force-bearing condition of the lifting spherical segment, so as to take timely measures when problems occur in the bearing, improve the safety factor of the bearing operation and extend the service life of the bearing.

Description

Technical Field

[0001] The invention relates to the technical field of building foundations and peripheral supporting facilities, in particular to a height-adjustable support. Background Art

[0002] In construction facilities such as roads, railways, and houses, bearings are indispensable structures that meet engineering design requirements. During the construction of transportation lines or after construction, foundation sinking due to various reasons requires remedial measures to be taken. Raising the bearings can compensate for the hidden dangers caused by the sinking. Especially in large-scale projects, products with this function are more needed.

[0003] At present, the height-adjustable bearings used in railway projects include steel bearings that are adjusted in the form of adding steel plates, and basin-type rubber bearings that are sealed with rubber plates in the basin and adjusted in the form of filling. However, the following problems may occur during use: First, the height adjustment range is limited when adding steel plates, and the height adjustment amount is related to the thickness of the steel plates. If the thickness is too thin, it is difficult to process, and if it is too thick, it affects the connection strength of the anchor bolts, and stepless height adjustment cannot be achieved. When adding steel plates, the equipment needs to be jacked up, which is time-consuming, labor-intensive and inefficient. Second, the basin-type rubber bearing is adjusted in the form of filling. Although it can be convenient, efficient and efficient, it suffers from rubber aging, and the product has a short service life, which is prone to engineering safety problems.

[0004] Therefore, how to change the current situation in the prior art where the height adjustment support cannot take into account both the convenience of adjustment and the extension of service life, has become an urgent problem to be solved by those skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to provide a height-adjustable support to solve the problems existing in the above-mentioned prior art, improve the adjustment convenience of the height-adjustable support, and at the same time monitor the stress state of the height-adjustable support, improve the safety factor of the height-adjustable support, and extend the service life of the support.

[0006] To achieve the above object, the present invention provides the following solution: The present invention provides a height-adjusting support, comprising:

[0007] An upper seat plate assembly, the upper seat plate assembly comprising an upper support plate;

[0008] An intermediate assembly, the intermediate assembly comprising an intermediate lining plate, the upper support plate being slidably disposed on top of the intermediate lining plate;

[0009] Lower seat plate assembly, the lower seat plate assembly includes a lifting spherical segment body and a bottom basin, the intermediate assembly is rotatably arranged on the top of the lifting spherical segment body, the abutting surface between the intermediate assembly and the lifting spherical segment body is spherical, the lifting spherical segment body is slidably connected to the bottom basin, and the sliding direction of the lifting spherical segment body relative to the bottom basin is parallel to the vertical direction; a sealing element is arranged between the lifting spherical segment body and the bottom basin, and there is a gap between the bottom of the lifting spherical segment body and the bottom basin to form a medium cavity, the medium cavity is filled with a regulating medium, and the lower seat plate assembly is provided with a medium inlet and a medium outlet, and both the medium inlet and the medium outlet are communicated with the medium cavity;

[0010] Force measuring assembly, the force measuring assembly is connected to the lower seat plate assembly, and the force measuring assembly can monitor the pressure of the regulating medium and the force condition of the lifting spherical segment body.

[0011] Preferably, the bottom basin has a sliding groove, the lifting spherical segment body is slidably arranged in the sliding groove, an installation position is arranged on the side wall of the sliding groove, the sealing element is arranged in the installation position, and the sealing element abuts against the lifting spherical segment body.

[0012] Preferably, a medium groove is arranged on the inner wall of the bottom of the bottom basin, the medium groove can accommodate the regulating medium, and the space formed by the inner wall of the bottom basin, the medium groove and the lifting spherical segment body forms the medium cavity.

[0013] Preferably, the medium groove includes a plurality of coaxially arranged annular grooves, adjacent annular grooves are communicated with each other, both the medium inlet and the medium outlet are arranged on the bottom basin, both the medium inlet and the medium outlet are communicated with the annular grooves, and the annular grooves are coaxially arranged with the lifting spherical segment body.

[0014] Preferably, the lower seat plate assembly further includes a sealing cover, the sealing cover is detachably connected to the bottom basin by fixing bolts, the sealing cover is annular, the sealing cover is sleeved outside the lifting spherical segment body, a first sealing ring is arranged between the sealing cover and the lifting spherical segment body, and a second sealing ring is arranged between the sealing cover and the bottom basin.

[0015] Preferably, the upper seat plate assembly further includes a first stainless steel plate, the first stainless steel plate is connected to the upper support plate, the first stainless steel plate is arranged at the bottom of the upper support plate, the intermediate assembly further includes a first sliding plate, the first sliding plate is connected to the intermediate lining plate, the first sliding plate is arranged at the top of the intermediate lining plate, and the first stainless steel plate is slidably arranged on the top of the first sliding plate.

[0016] Preferably, the intermediate component further includes a second stainless steel plate, which is connected to the intermediate lining plate and disposed at the bottom of the intermediate lining plate. The lower seat plate assembly further includes a second sliding plate, which is connected to the lifting spherical segment body and disposed at the top of the lifting spherical segment body. The second stainless steel plate is rotatably disposed on the top of the second sliding plate.

[0017] Preferably, the top of the lifting spherical segment body has a rotating pit, which is a spherical pit. The second sliding plate is disposed in the rotating pit. The second sliding plate is a curved plate structure matching the rotating pit. The intermediate lining plate has a spherical protrusion. The second stainless steel plate is a curved plate structure matching the spherical protrusion. The spherical protrusion is rotatably disposed in the rotating pit. The second sliding plate abuts against the second stainless steel plate.

[0018] Preferably, the axial section of the upper support plate is an inverted U-shaped structure, and there is a gap between the side wall of the upper support plate and the lifting spherical segment body; a third stainless steel plate is disposed on the inner wall of the upper support plate, and a third sliding plate is disposed on the outer side wall of the bottom basin. The third stainless steel plate is disposed opposite to the third sliding plate.

[0019] Preferably, a check valve is disposed at the medium inlet, and the medium inlet is connected to a pump body.

[0020] The present invention has achieved the following technical effects compared with the prior art:

[0021] For the height-adjustable support of the present invention, the upper support plate can slide relative to the intermediate lining plate. The intermediate lining plate is rotatably disposed at the top of the lifting spherical segment body. The upper seat plate assembly, the intermediate component and the lifting spherical segment body cooperate with each other, so that the height-adjustable support can adapt to the thermal expansion and contraction of building facilities and other normal sliding and rotation; a regulating medium is filled in the medium cavity between the lifting spherical segment body and the bottom basin. The regulating medium is filled into the medium cavity through the medium inlet. The lifting spherical segment body is lifted by the regulating medium. The lifting spherical segment body, the upper seat plate assembly and the intermediate component slide relative to the bottom basin to achieve the purpose of adjusting the height of the support. The regulating medium can be selected as a liquid medium. The lifting spherical segment body is lifted by the regulating medium, realizing stepless adjustment and improving the convenience of support adjustment; at the same time, a force measuring component is provided. The force measuring component can monitor the pressure of the regulating medium in the medium cavity and the force condition of the lifting spherical segment body, so as to take timely measures when problems occur in the support, improving the safety factor of the support operation. When the regulating medium fails, the failed regulating medium can be discharged through the medium outlet, and a new regulating medium can be replaced to extend the service life of the support. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 Structural schematic diagram of the height-adjusting support of the present invention;

[0024] Figure 2 For Figure 1 Enlarged schematic diagram of part of the structure;

[0025] Figure 3 Structural schematic diagram of the medium groove of the height-adjusting support of the present invention.

[0026] Among them, 1 is the upper seat plate assembly, 101 is the upper support plate, 102 is the first stainless steel plate, 103 is the third stainless steel plate, 2 is the intermediate assembly, 201 is the intermediate lining plate, 202 is the first sliding plate, 203 is the second stainless steel plate, 3 is the lower seat plate assembly, 301 is the lifting spherical segment, 302 is the bottom basin, 303 is the second sliding plate, 304 is the sliding groove, 305 is the installation position, 306 is the sealing cover, 307 is the sealing element, 308 is the first sealing ring, 309 is the second sealing ring, 310 is the third sliding plate, 311 is the fixing bolt, 4 is the medium cavity, 401 is the medium groove, 402 is the annular groove, 5 is the medium inlet, 6 is the medium outlet, 7 is the quick connector, 8 is the one-way valve, 9 is the force measuring assembly. Detailed implementation manners

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] The purpose of the present invention is to provide a height-adjusting support to solve the problems existing in the above-mentioned prior art, improve the adjustment convenience of the height-adjusting support, monitor the stress state of the height-adjusting support at the same time, improve the safety factor of the height-adjusting support, and extend the service life of the support.

[0029] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the drawings and specific implementation manners.

[0030] Please refer to Figures 1-3 , among which, Figure 1Structural schematic diagram of the height-adjustable support of the present invention Figure 2 is Figure 1 an enlarged schematic diagram of a partial structure in Figure 3 Structural schematic diagram of the medium groove of the height-adjustable support of the present invention

[0031] The present invention provides a height-adjustable support, including an upper seat plate assembly 1, an intermediate assembly 2, a lower seat plate assembly 3 and a force measuring assembly 9. Among them, the upper seat plate assembly 1 includes an upper support plate 101, the intermediate assembly 2 includes an intermediate lining plate 201, the upper support plate 101 is slidably arranged on the top of the intermediate lining plate 201, the lower seat plate assembly 3 includes a lifting spherical segment 301 and a bottom basin 302, the intermediate assembly 2 is rotatably arranged on the top of the lifting spherical segment 301, the contact surface between the intermediate assembly 2 and the lifting spherical segment 301 is spherical, the lifting spherical segment 301 is slidably connected to the bottom basin 302, and the sliding direction of the lifting spherical segment 301 relative to the bottom basin 302 is parallel to the vertical direction; a sealing element 307 is arranged between the lifting spherical segment 301 and the bottom basin 302, and there is a gap between the bottom of the lifting spherical segment 301 and the bottom basin 302 to form a medium cavity 4, the medium cavity 4 is filled with a regulating medium, the lower seat plate assembly 3 is provided with a medium inlet 5 and a medium outlet 6, and both the medium inlet 5 and the medium outlet 6 are communicated with the medium cavity 4; the force measuring assembly 9 is connected to the lower seat plate assembly 3, and the force measuring assembly 9 can monitor the pressure of the regulating medium and the force condition of the lifting spherical segment 301.

[0032] For the height-adjustable support of the present invention, the upper support plate 101 can slide relative to the intermediate lining plate 201, the intermediate lining plate 201 is rotatably arranged on the top of the lifting spherical segment 301, and the upper seat plate assembly 1, the intermediate assembly 2 and the lifting spherical segment 301 cooperate to enable the height-adjustable support to adapt to the thermal expansion and contraction of building facilities and other normal sliding and rotation; a regulating medium is filled in the medium cavity 4 between the lifting spherical segment 301 and the bottom basin 302, the regulating medium is filled into the medium cavity 4 through the medium inlet 5, and the lifting spherical segment 301 is lifted by the regulating medium, and the lifting spherical segment 301, the upper seat plate assembly 1 and the intermediate assembly 2 slide relative to the bottom basin 302 to achieve the purpose of adjusting the height of the support. The regulating medium can be selected as a liquid medium, and the lifting spherical segment 301 is lifted by the regulating medium, realizing stepless adjustment and improving the convenience of support adjustment; at the same time, a force measuring assembly 9 is provided, and the force measuring assembly 9 can monitor the pressure of the regulating medium in the medium cavity 4 and the force condition of the lifting spherical segment 301, so as to take timely measures when problems occur in the support and improve the safety factor of the support operation. When the regulating medium fails, the failed regulating medium can be discharged through the medium outlet 6, and a new regulating medium can be replaced to extend the service life of the support.

[0033] Among them, the bottom basin 302 has a sliding groove 304, and the lifting spherical segment body 301 is slidably arranged in the sliding groove 304. The sliding groove 304 provides guidance for the reciprocating sliding of the lifting spherical segment body 301, avoiding the sliding dislocation of the lifting spherical segment body 301 and further improving the safety factor of the bearing. An installation position 305 is arranged on the side wall of the sliding groove 304, and a sealing element 307 is arranged in the installation position 305. The sealing element 307 can be selected as a sealing ring. The sealing element 307 abuts against the lifting spherical segment body 301. The sealing element 307 ensures the sealing of the medium cavity 4, avoids the leakage of the regulating medium, and ensures the normal operation of the adjusting bearing. It should also be noted that when the lifting spherical segment body 301 slides up and down, the sealing element 307 and the lifting spherical segment body 301 have relative sliding. In order to ensure the sealing performance of the sealing element 307, the sealing element 307 can be made of wear-resistant and aging-resistant polyethylene material to improve the service life of the sealing element 307.

[0034] Specifically, a medium groove 401 is arranged on the inner wall of the bottom of the bottom basin 302. The medium groove 401 can accommodate the regulating medium. The space formed by the inner wall of the bottom basin 302, the medium groove 401 and the lifting spherical segment body 301 forms a medium cavity 4. When the lifting spherical segment body 301 descends to the lowest position, the space formed by the medium groove 401 and the lifting spherical segment body 301 forms a medium cavity 4, so that the regulating medium can be smoothly introduced to push the lifting spherical segment body 301 to rise smoothly.

[0035] In this specific embodiment, the medium groove 401 includes a plurality of coaxially arranged annular grooves 402, and the adjacent annular grooves 402 are communicated with each other. Both the medium inlet 5 and the medium outlet 6 are arranged on the bottom basin 302, and both the medium inlet 5 and the medium outlet 6 are communicated with the annular grooves 402. The annular grooves 402 are coaxially arranged with the lifting spherical segment body 301. The medium groove 401 includes a plurality of coaxially arranged and communicated annular grooves 402, and the annular grooves 402 are coaxially arranged with the lifting spherical segment body 301, which improves the force uniformity of the lifting spherical segment body 301, thereby ensuring the movement stability of the lifting spherical segment body 301 and improving the reliability of the bearing.

[0036] More specifically, the lower seat plate assembly 3 further includes a sealing cover 306. The sealing cover 306 is detachably connected to the bottom basin 302 by fixing bolts 311. The sealing cover 306 is annular, the sealing cover 306 is sleeved outside the lifting spherical segment body 301, a first sealing ring 308 is arranged between the sealing cover 306 and the lifting spherical segment body 301, and a second sealing ring 309 is arranged between the sealing cover 306 and the bottom basin 302. The arrangement of the sealing cover 306 further improves the sealing performance between the lifting spherical segment body 301 and the bottom basin 302, avoiding dust, impurities and particulate matters from entering between the lifting spherical segment body 301 and the bottom basin 302, causing abrasion or causing damage to the sealing element 307 resulting in the leakage of the regulating medium.

[0037] In addition, the upper seat plate assembly 1 further includes a first stainless steel plate 102, which is connected to the upper support plate 101 and is disposed at the bottom of the upper support plate 101. The intermediate assembly 2 further includes a first sliding plate 202, which is connected to the intermediate lining plate 201 and is disposed at the top of the intermediate lining plate 201. The first stainless steel plate 102 is slidably disposed on the top of the first sliding plate 202. The first stainless steel plate 102 and the first sliding plate 202 are arranged to form a sliding friction pair, improving the sliding smoothness between the upper seat plate assembly 1 and the intermediate lining plate 201, and at the same time enhancing the wear resistance of the device.

[0038] Correspondingly, the intermediate assembly 2 further includes a second stainless steel plate 203, which is connected to the intermediate lining plate 201 and is disposed at the bottom of the intermediate lining plate 201. The lower seat plate assembly 3 further includes a second sliding plate 303, which is connected to the lifting spherical segment 301 and is disposed at the top of the lifting spherical segment 301. The second stainless steel plate 203 is rotatably disposed on the top of the second sliding plate 303. The second stainless steel plate 203 and the second sliding plate 303 are arranged to form a rotational friction pair, ensuring that the intermediate assembly 2 can rotate smoothly relative to the lower seat plate assembly 3 and realizing the basic function of the support.

[0039] In this specific embodiment, the top of the lifting spherical segment 301 has a rotational concave pit, which is a spherical concave pit. The second sliding plate 303 is disposed in the rotational concave pit. The second sliding plate 303 is a curved plate structure matching the rotational concave pit. The intermediate lining plate 201 has a spherical protrusion. The second stainless steel plate 203 is a curved plate structure matching the spherical protrusion. The spherical protrusion is rotatably disposed in the rotational concave pit. The second sliding plate 303 abuts against the second stainless steel plate 203, and the abutting surface between the second sliding plate 303 and the second stainless steel plate 203 is spherical, enabling the intermediate assembly 2 to rotate relative to the lower seat plate assembly 3 to meet the rotational requirements of building facilities.

[0040] Furthermore, the axial cross-section of the upper support plate 101 is an inverted U-shaped structure, and there is a gap between the side wall of the upper support plate 101 and the lifting spherical segment 301. When the intermediate assembly 2 and the upper seat plate assembly 1 rotate relative to the lower seat plate assembly 3, the side wall of the upper support plate 101 and the bottom basin 302 cooperate to limit the rotational limit position of the intermediate assembly 2, further improving the safety factor of the support. In addition, a third stainless steel plate 103 is disposed on the inner wall of the upper support plate 101, and a third sliding plate 310 is disposed on the outer side wall of the bottom basin 302. The third stainless steel plate 103 is disposed opposite to the third sliding plate 310. When relative movement occurs between the upper support plate 101 and the bottom basin 302, the wear resistance of the upper support plate 101 and the bottom basin 302 is enhanced, and the service life of the support is prolonged.

[0041] Furthermore, the medium inlet 5 is connected with a pump body and a quick connector 7, which facilitates the smooth introduction of the medium. A check valve 8 is provided at the medium inlet 5 to prevent the backflow of the adjusting medium after the support is adjusted, ensuring the working reliability of the adjusting support.

[0042] In the height-adjusting support of the present invention, an adjusting medium is filled in the medium cavity 4 between the lifting spherical segment body 301 and the bottom basin 302. The adjusting medium is filled into the medium cavity 4 through the medium inlet 5, and the lifting spherical segment body 301 is lifted by the adjusting medium. The medium cavity 4 includes an annular groove 402, which improves the uniform stress of the lifting spherical segment body 301 and prevents tilting caused by uneven stress. The lifting spherical segment body 301, the upper seat plate assembly 1 and the intermediate assembly 2 slide relative to the bottom basin 302. The adjusting medium can be selected as a liquid medium, and the lifting spherical segment body 301 is lifted by the adjusting medium, realizing stepless adjustment and improving the convenience of support adjustment; when the building facility sinks, the adjusting medium is filled to adjust the height of the support. At the same time, a force-measuring assembly 9 is provided in the present invention. The force-measuring assembly 9 can monitor the pressure of the adjusting medium in the medium cavity 4 and the stress condition of the lifting spherical segment body 301, so as to take timely measures when problems occur in the support, avoid the occurrence of major accidents and improve the safety factor of the support operation; when the adjusting medium fails, the failed adjusting medium can be discharged through the medium outlet 6, and a new adjusting medium can be replaced to extend the service life of the support.

[0043] Specific examples are used in the present invention to illustrate the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A height-adjustable support, characterized in that, Comprising: An upper seat plate assembly, the upper seat plate assembly including an upper support plate; An intermediate assembly, the intermediate assembly including an intermediate lining plate, the upper support plate being slidably disposed on top of the intermediate lining plate; A lower seat plate assembly, the lower seat plate assembly including a lifting spherical segment and a bottom basin, the intermediate assembly being rotatably disposed on top of the lifting spherical segment, the abutting surface between the intermediate assembly and the lifting spherical segment being spherical, the lifting spherical segment being slidably connected to the bottom basin, the sliding direction of the lifting spherical segment relative to the bottom basin being parallel to the vertical direction; a sealing element is provided between the lifting spherical segment and the bottom basin, and there is a gap between the bottom of the lifting spherical segment and the bottom basin to form a medium cavity, the medium cavity being filled with a regulating medium, the lower seat plate assembly being provided with a medium inlet and a medium outlet, both the medium inlet and the medium outlet being connected to the medium cavity; A force measuring assembly, the force measuring assembly being connected to the lower seat plate assembly, the force measuring assembly being capable of monitoring the pressure of the regulating medium and the force condition of the lifting spherical segment; The bottom basin has a sliding groove, the lifting spherical segment being slidably disposed in the sliding groove, an installation position being provided on the side wall of the sliding groove, the sealing element being disposed in the installation position, the sealing element abutting against the lifting spherical segment; A medium groove is provided on the bottom inner wall of the bottom basin, the medium groove being capable of accommodating the regulating medium, the space formed by the inner wall of the bottom basin, the medium groove and the lifting spherical segment forms the medium cavity; The medium groove includes a plurality of coaxially arranged annular grooves, adjacent annular grooves being connected, both the medium inlet and the medium outlet being provided on the bottom basin, both the medium inlet and the medium outlet being connected to the annular grooves, the annular grooves being coaxially arranged with the lifting spherical segment; The intermediate assembly further includes a second stainless steel plate, the lower seat plate assembly further includes a second sliding plate, the top of the lifting spherical segment has a rotating pit, the rotating pit being a spherical pit, the second sliding plate being disposed in the rotating pit, the second sliding plate being a curved panel structure matching the rotating pit, the intermediate lining plate has a spherical protrusion, the second stainless steel plate being a curved panel structure matching the spherical protrusion, the spherical protrusion being rotatably disposed in the rotating pit, the second sliding plate abutting against the second stainless steel plate.

2. The height-adjustable support according to claim 1, wherein: The lower seat plate assembly further includes a sealing cover, the sealing cover being detachably connected to the bottom basin by fixing bolts, the sealing cover being annular, the sealing cover being sleeved outside the lifting spherical segment, a first sealing ring being provided between the sealing cover and the lifting spherical segment, and a second sealing ring being provided between the sealing cover and the bottom basin.

3. The height-adjustable support according to claim 1, characterized in that: The upper seat plate assembly further includes a first stainless steel plate, which is connected to the upper support plate and is disposed at the bottom of the upper support plate. The intermediate assembly further includes a first sliding plate, which is connected to the intermediate lining plate and is disposed at the top of the intermediate lining plate. The first stainless steel plate is slidably disposed on the top of the first sliding plate.

4. The height-adjustable support according to claim 1, characterized in that: The second stainless steel plate is connected to the intermediate lining plate and is disposed at the bottom of the intermediate lining plate. The second sliding plate is connected to the lifting spherical segment body and is disposed at the top of the lifting spherical segment body. The second stainless steel plate is rotatably disposed on the top of the second sliding plate.

5. The height-adjustable support according to claim 1, wherein: The axial cross-section of the upper support plate is an inverted U-shaped structure, and there is a gap between the side wall of the upper support plate and the lifting spherical segment body; a third stainless steel plate is disposed on the inner wall of the upper support plate, and a third sliding plate is disposed on the outer side wall of the bottom basin, and the third stainless steel plate is disposed opposite to the third sliding plate.

6. The height-adjustable support according to claim 1, characterized in that: A check valve is provided at the medium inlet, and the medium inlet is connected to a pump body.

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