Novel high-damping shock insulation rubber support

Abstract

The utility model provides a novel high-damping shock insulation rubber support, and belongs to the technical field of bridge supports. The support comprises a first support plate, a support body and a second support plate which are sequentially arranged in an overlapped mode, the support body is fixed between the first support plate and the second support plate, one of the first support plate and the second support plate is used for being connected with a beam body, and the other one of the first support plate and the second support plate is used for being connected with an abutment. The support further comprises a pressing plate, part of the pressing plate is located on the side, close to the support body, of the second support plate and is in contact fit with the second support plate, and part of the pressing plate is located outside the second support plate and is fixed to an abutment or a beam body corresponding to the second support plate through a connecting piece. According to the utility model, the pressing plate is arranged to press the second support plate between the pressing plate and the abutment or between the pressing plate and the beam body, and the position of the second support plate is adjusted within the pressing range of the pressing plate, so that the second support plate is adjusted to the position aligned with the first support plate and the support main body, and the support is stably mounted between the beam body and the abutment.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge bearings, and in particular relates to a novel high-damping seismic isolation rubber bearing. Background Art

[0002] Bridge bearings are important structural components that connect the superstructure and substructure of the bridge and are key components that "connect the upper and lower structures". High-damping seismic isolation rubber bearings are important carriers for realizing the seismic reduction and isolation functions of bridges and are widely used in bridge engineering construction. Their structure and performance need to adapt to the needs of modern beam assembly construction to improve overall construction efficiency.

[0003] During the assembly of the rubber bearing, it is necessary to embed relevant structural parts in the beam and pier in advance to facilitate the subsequent fixed installation of the rubber bearing between the beam and the pier. However, due to construction errors, the structural parts in the beam and pier are prone to deviate from the preset installation position, resulting in a low probability that the installation holes of the rubber bearing are aligned with the structural parts in the pier and beam at the same time during the installation of the rubber bearing, resulting in the inability to install the bearing or causing inconvenience in the installation of the bearing. Utility Model Content

[0004] The purpose of this application is to provide a new type of high-damping seismic isolation rubber bearing to solve the above-mentioned technical problems existing in the prior art.

[0005] This application is implemented as follows:

[0006] An embodiment of the present application provides a novel high-damping seismic isolation rubber bearing, comprising a first bearing plate, a bearing body and a second bearing plate which are arranged in sequence and overlap each other, the bearing body being fixed between the first bearing plate and the second bearing plate, one of the first bearing plate and the second bearing plate being used to connect with the beam body, and the other being used to connect with the pier; the bearing also includes a pressure plate, part of which is located on the side of the second bearing plate close to the bearing body and in contact with the second bearing plate, and part of which is located outside the second bearing plate and fixed to the pier or beam body corresponding to the second bearing plate through a connecting member.

[0007] The technical solution provided by this application can achieve the following beneficial effects:

[0008] In the present application, a pressure plate is set to contact with the second support plate, and the pressure plate is fixed to the beam body or pier corresponding to the second support plate, and the pressure plate is used to press the second support plate between the pressure plate and the pier or the pressure plate and the beam body to fix the position of the second support plate; by setting the pressure plate to contact with the second support plate, the installation method of the second support plate is changed, and compared with the conventional direction of fixing by bolts, the second support plate is fixed by pressing the pressure plate, and there is no need to align with the mounting hole, thereby improving the installation convenience of the second support plate and the support; because the pressure plate presses and fixes the second support plate by contacting with the second support plate, the position of the second support plate can be adjusted within the pressing range of the pressure plate, so that the second support plate is adjusted to a position aligned with the first support plate and the support body, so that the support is stably installed between the beam body and the pier, avoiding the position deviation of the second support plate, which makes the overall support unable to be installed or inconvenient to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0010] Figure 1 is a schematic diagram of the structure of a rubber bearing provided in some embodiments of the present application;

[0011] Figure 2 This application is about Figure 1 Detailed view of point A;

[0012] Figure 3 Structural schematic diagram of the rubber bearing provided in some embodiments of the present application Figure 2 ;

[0013] Figure 4 This is a schematic diagram of the cooperation between the pressure plate and the second support plate provided in some embodiments of the present application Figure 1 ;

[0014] Figure 5 This is a schematic diagram of the cooperation between the pressure plate and the second support plate provided in some embodiments of the present application Figure 2 ;

[0015] Figure 6 This is a schematic diagram of the connection structure between the pressure plate and the pier provided in some embodiments of the present application. Figure 1 ;

[0016] Figure 7 This is a schematic diagram of the connection structure between the pressure plate and the pier provided in some embodiments of the present application. Figure 2 ;

[0017] Figure 8 This is a schematic diagram of the connection structure between the pressure plate and the pier provided in some embodiments of the present application. Figure 3 .

[0018] In the figure: 10-beam body, 20-pier, 100-first bearing plate, 110-first sealing steel plate, 120-first bearing steel plate, 200-second bearing plate, 210-second clamping piece, 220-second sealing steel plate, 230-second bearing steel plate, 300-support body, 400-pressure plate, 410-first clamping piece, 420-first type of pressure plate, 430-second type of pressure plate, 500-connecting piece, 600-support piece, 700-positioning piece, 810-embedded steel plate, 820-anchor rod, 830-sleeve, 840-rebar, 850-anchor bolt. DETAILED DESCRIPTION

[0019] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0020] The present application provides a novel high damping seismic isolation rubber bearing, referring to Figures 1 to 8 As shown, the support includes a first support plate 100, a support body 300 and a second support plate 200 which are sequentially overlapped, and the support body 300 is fixed between the first support plate 100 and the second support plate 200. One of the first support plate 100 and the second support plate 200 is used to connect with the beam body 10, and the other is used to connect with the pier 20. The support also includes a pressing plate 400, part of which is located on the side of the second support plate 200 close to the support body 300 and contacts and cooperates with the second support plate 200, and part of which is located outside the second support plate 200 and is fixed to the pier 20 or the beam body 10 corresponding to the second support plate 200 through a connecting member 500.

[0021] The pressing plate 400 is connected to the beam body 10 or the pier 20 corresponding to the second support plate 200, and the second support plate 200 is pressed between the pressing plate 400 and the beam body 10, so as to fix the second support plate 200 to the beam body 10, or the second pressing plate 400 is pressed between the pressing plate 400 and the pier 20 to fix the relative position of the second support plate 200 and the pier 20, so as to prevent the position of the second support plate 200 from shifting, and complete the installation of the second support plate 200. Since the pressing plate 400 is pressed and fixed by contacting with the second support plate 200, during the installation of the support, the second support plate 200 can adjust its position within the pressing range of the pressing plate 400, so that the support is stably installed between the beam body 10 and the pier 20.

[0022] In the prior art, the first support plate 100 and the second support plate 200 are generally provided with mounting holes, and the positions of the first support plate 100 and the second support plate 200 are fixed by aligning the mounting holes with the pre-buried structural parts in the beam body 10 and the pier 20. Due to the existence of construction errors, when the first support plate 100 is aligned with the structural parts on the beam body 10, the second support plate 200 and the structural parts on the pier 20 may not be aligned. Therefore, there may be a deviation between the actual installation position of the second support plate 200 and its preset installation position, so that the support body 300 fixed between the first support plate 100 and the second support plate 200 cannot be stably fixed between the first support plate 100 and the second support plate 200. The unstable installation of the support body 300 includes the case where the support is pulled and deformed by the first support plate 100 and the second support plate 200, or the case where the connection between the support body 300 and the first support plate 100 or the second support plate 200 is unstable.

[0023] Therefore, in the embodiment of the present application, a pressure plate 400 is provided and the pressure plate 400 is utilized to contact the second support plate 200 to change the installation method of the second support plate 200. Compared with the conventional fixation method using bolts or the like, the second support plate 200 is fixed by pressing the pressure plate 400. There is no need to provide installation holes on the second support plate 200, nor is there any need to align the installation holes on the second support plate 200 with the embedded structural parts on the pier 20 or the beam body 10, thereby improving the installation convenience of the second support plate 200 and the support. In addition, the present application can adjust the position of the second support plate 200 while ensuring the stable installation of the second support plate 200 and the pier 20 or the beam body 10, so that the second support plate 200 is aligned with the support body 300 and the first support plate 100, thereby ensuring the stable connection between the second support plate 200 and the support body 300, and the support body 300 will not be pulled by the second support plate 200, ensuring that the support is normally installed between the beam body 10 and the pier 20 and can be used normally. It should be noted that during the installation of the support, the pressure plate 400 will be fixed on the pier 20 or the beam body 10 only after the position adjustment of the second support plate 200 is completed, and the position of the second support plate 200 is fixed by the pressure plate 400.

[0024] In some specific embodiments, the first support plate 100 is directly fixed to the beam body 10 or the pier 20 to determine the installation position of the support, and then the position of the second support plate 200 is adjusted according to the position of the first support plate 100, so that the first support plate 100 and the second support plate 200 can be aligned, thereby improving the installation convenience of the support. In other specific embodiments, a pressing plate 400 can also be set on the side of the first support plate 100 close to the support body 300, and the position of the first support plate 100 is fixed by the pressing plate 400. The positions of the first support plate 100 and the second support plate 200 can be adjusted, which is more convenient for installing the support to a preset position.

[0025] The anchor structure can be embedded in the beam body 10 and the pier 20 in advance. In the subsequent installation of the support, the first support plate 100 can be directly connected to the anchor structure using the anchor bolt 850 to fix the position of the first support plate 100. The pressure plate 400 can also be connected to the anchor structure using the connector 500 to fix the position of the pressure plate 400. In some embodiments, the anchor structure includes a sleeve 830 and an anchor rod 820. The anchor rod 820 passes through the sleeve 830. Figure 6 As shown. Anchor rod 820 can be replaced by steel bar 840, see Figure 7 and Figure 8 As shown, the steel bar 840 may have a hook. In the case where the first support plate 100 is directly connected to the anchor structure, an embedded steel plate 810 may be provided in the pier 20 or beam body 10 corresponding to the first support plate 100. Figure 1 and Figure 3 As shown, the anchor bolt 850 is sequentially inserted into the first support plate 100 and the embedded steel plate 810 , and then extends into the sleeve 830 , and is threadedly connected with the sleeve 830 , thereby improving the installation stability of the first support plate 100 .

[0026] Since the pressure plate 400 needs to contact and cooperate with the surface of the second support plate 200 close to the support body 300, at least part of the surface of the second support plate 200 close to the support body 300 is exposed to the support body 300, and the exposed part of the surface of the second support plate 200 can be used to contact the pressure plate 400.

[0027] The larger the contact area between the pressing plate 400 and the second support plate 200, the greater the friction between the pressing plate 400 and the second support plate 200. After the support is installed, the second support plate 200 is less likely to slide during use of the support. There are many contact modes between the pressing plate 400 and the second support plate 200, such as surface contact, point contact, etc.

[0028] In some embodiments of the present application, in order to further improve the sliding resistance between the second support plate 200 and the pressing plate 400 and further avoid the second support plate 200 moving relative to the pressing plate 400 during the use of the support, refer to Figure 1 and Figure 2 As shown, a first clamping member 410 is provided on the pressing plate 400 , and a second clamping member 210 is provided on the second supporting plate 200 . The movement of the second supporting plate 200 is prevented by the cooperation between the first clamping member 410 and the second clamping member 210 .

[0029] There are multiple first clamping parts 410, which are evenly arranged on the pressure plate 400. There are also multiple second clamping parts 210, which are evenly arranged on the second support plate 200. The first clamping parts 410 and the second clamping parts 210 are arranged in the same direction and are arranged facing each other, so that the first clamping part 410 is clamped into the second clamping part 210, or the second clamping part 210 is clamped into the first clamping part 410. The two are clamped together to prevent the second support plate 200 and the pressure plate 400 from moving relative to each other.

[0030] In the arrangement direction of the first clamping members 410, the plurality of first clamping members 410 are arranged from the edge of the pressure plate 400 close to the support body 300 toward the connecting member 500, and the plurality of second clamping members 210 are arranged from the edge of the second support plate 200 close to the connecting member 500 toward the support body 300, with reference to Figure 2 As shown. Since the edges of the pressing plate 400 and the second support plate 200 are both provided with multiple evenly arranged clips, during the installation of the support, even if the position of the second support plate 200 is adjusted and the contact area between the second support plate 200 and the pressing plate 400 is changed, the edge of the second support plate 200 and the edge of the pressing plate 400 are still in contact and matched, and the multiple second clips 210 and the multiple first clips 410 corresponding to the contact parts can always be clipped and matched. Figure 2 No matter whether the second support plate 200 is moved to the left or right as shown in the figure, only the number of the snap-fitting parts between the second support plate 200 and the pressure plate 400 changes, but it will not affect the normal contact between the second support plate 200 and the pressure plate 400. Any first snap-fit ​​part 410 at the contact part can be snapped into the corresponding second snap-fit ​​part 210, and there will be no situation where the first snap-fit ​​part 410 is directly pressed against the surface of the second support plate 200 and cannot be snapped into the second snap-fit ​​part 210.

[0031] One of the first clamping member 410 and the second clamping member 210 may be a groove structure, and the other may be a protrusion structure, and the first clamping member 410 and the second clamping member 210 are clamped together by the protrusion being clamped in the groove.

[0032] In some preferred embodiments, the length of the first clamping member 410 is less than that of the second clamping member 210. Since the length of the first clamping member 410 is shorter, the first clamping member 410 can move relative to the second clamping member 210 along its length direction. On the moving path of the first clamping member 410, the first clamping member 410 is always clamped in the second clamping member 210. The moving direction of the first clamping member 410 is perpendicular to the arrangement direction of the plurality of first clamping members 410. Under such a layout, not only can the distance between the second support plate 200 and the pressing plate 400 be adjusted along the arrangement direction of the plurality of first clamping members 410, but also the distance between the second support plate 200 and the pressing plate 400 can be adjusted along the length direction of the first clamping member 410, thereby increasing the adjustable direction of the second support plate 200 and enabling the operator to adjust the position of the second support plate 200 more flexibly.

[0033] Further preferably, at least two pressing plates 400 are provided, and the pressing plates 400 are divided into a first type of pressing plates 420 and a second type of pressing plates 430. The first type of pressing plates 420 and the plurality of first clamping members 410 corresponding to the second type of pressing plates 430 are arranged along the first direction, and the first direction is perpendicular to the second direction. The first type of pressing plates 420 restrict the second support plate 200 from moving relative to the first type of pressing plates 420 along the first direction, and the second type of pressing plates 430 restrict the second support plate 200 from moving relative to the second type of pressing plates 430 along the second direction. The first type of pressing plates 420 and the second type of pressing plates 430 jointly press the second support plate 200, and can restrict the movement of the second support plate 200 in both the first direction and the second direction, further stabilize the position of the second support plate 200, and avoid the second support plate 200 from shifting in position during the use of the support.

[0034] Furthermore, since the first direction is perpendicular to the second direction, when the position of the second support plate 200 is adjusted along the first direction, the positions of all the second clamping members 210 provided on the second support plate 200 are changed. Among them, the plurality of second clamping members 210 corresponding to a type of pressing plate 420 are arranged along the first direction, and the plurality of second clamping members 210 move along the first direction, which will change the number of the second clamping members 210 clamped with a type of pressing plate 420, and change the contact area between the second support plate 200 and the type of pressing plate 420. The plurality of second clamping members 210 corresponding to the second type of pressing plate 430 are arranged along the second direction. When the second clamping members 210 move along the first direction, the number of the second clamping members 210 clamped with the second type of pressing plate 430 will not change, but only the part where the second clamping members 210 are connected to the first clamping members 410 will change. Since the length of the second clamping members 210 is greater than that of the first clamping members 410, as long as the moving distance of the second clamping members 210 is appropriate, even if the position of the second support plate 200 is adjusted along the first direction, the second support plate 200 after the position adjustment can still be normally clamped and matched with the second type of pressing plate 430. Similarly, adjusting the position of the second support plate 200 along the second direction will not affect the normal matching of the first type of pressing plate 420 and the second support plate 200.

[0035] Furthermore, at least one pressure plate 400 is correspondingly disposed on any side of the second support. The pressure plate 400 is disposed around the second support plate 200 so that the pressure on the second support plate 200 is balanced. Figure 4 and Figure 5 As shown, a plurality of pressing plates 400 are arranged around the second support plate 200. Only one pressing plate 400 may be arranged on one side of the second support plate 200. Figure 4 As shown, two pressing plates 400 may also be provided on one side wall of the second support plate 200. Half of the first type of pressing plates 420 and half of the second type of pressing plates 430 are provided in the plurality of pressing plates 400, so that the resistances received by the second support plate 200 in the first direction and the second direction are balanced. Figure 5 As shown, the pressure plate 400 arranged on the same side of the second support plate 200 can be a type I pressure plate 420 or a type II pressure plate 430 at the same time. In other embodiments, the type I pressure plate 420 and the type II pressure plate 430 can also be arranged on the same side of the second support plate 200 at the same time.

[0036] refer to Figure 1 , Figures 6 to 8As shown, the support also includes a support member 600, which is used to support between the pier 20 and the pressure plate 400, and the thickness of the support member 600 is the same as the thickness of the second support plate 200. The support member 600 is used to support the pressure plate 400 to ensure that the pressure plate 400 can be stably pressed against the surface of the second support plate 200. The pressure plate 400 and the support member 600 can be an integrally formed structure. When assembling the connecting member 500, the connecting member 500 is used to pass through the pressure plate 400 and the support member 600 at the same time, and is fixed to the sleeve 830 embedded in the beam body 10 or the pier 20. Alternatively, the pressure plate 400 and the support member 600 are separately provided, and a suitable thickness of the pressure plate 400 is selected according to the actual thickness of the second support plate 200, and then the connecting member 500 is used to pass through the pressure plate 400 and the support member 600 at the same time, and is connected to the corresponding sleeve 830 to fix the pressure plate 400 and the support member 600. In the above two connection methods, the ends of the connecting member 500 are both located outside the pressing plate 400. Figure 8 Alternatively, the connecting member 500 may be passed through the supporting member 600 in advance, and then the supporting member 600 and the pressing plate 400 may be welded and fixed, as shown in FIG. Figure 6 and Figure 7 As shown, in this way, the end of the connecting member 500 is hidden between the supporting member 600 and the pressing plate 400, so as to prevent external factors from affecting the structure of the connecting member 500.

[0037] The support also includes a positioning member 700, referring to Figure 1 , Figure 2 , Figures 6 to 8 As shown, the positioning member 700 is configured to be pre-buried in the pier 20 or the beam body 10, and the positioning member 700 is used to position and install the connecting member 500. The positioning member 700 can be an annular structure, which is pre-buried in the pier 20 or the beam body 10 in advance. In the case where multiple pressure plates 400 are connected, multiple positioning members 700 can enclose to form a larger installation space, through which the approximate installation position of the second support plate 200 can be confirmed. After the position adjustment of the second support plate 200 is completed, the installation position of the pressure plate 400 is accurately determined by the positioning member 700.

[0038] In some embodiments of the present application, the support body 300 may be a structural member made of a high damping rubber material. For example, the vertical bearing capacity of the support body 300 is in the range of 100 kN to 15000 kN, the first shape coefficient S1 of the support body 300 is in the range of 8≤S1≤15, the design compressive stress is in the range of 8MPa to 12MPa, and the equivalent damping ratio is 10% to 25%, which has a high horizontal displacement and vertical bearing adaptability. In other embodiments, the support body 300 may also be a structural member made of a natural rubber material.

[0039] The support body 300 is formed by cross-placing rubber material and steel plate interlayers and then vulcanizing. In the actual processing process, in order to ensure the stability of the positions of the rubber material and the steel plate and prevent the two from moving relative to each other, a process hole can be set on the support body 300.

[0040] In some embodiments of the present application, reference Figure 1 As shown, the first support plate 100 includes a first sealing steel plate 110 and a first support steel plate 120 which are overlapped and fixed, and the two can be fixedly connected by bolts, shear pins, etc.; the second support plate 200 includes a second sealing steel plate 220 and a second support steel plate 230 which are overlapped and fixed, and the two can be fixedly connected by bolts, shear pins, etc. The first sealing steel plate 110 and the second sealing steel plate 220 are both fixed to the support body 300 by vulcanization, and the second support steel plate 230 is in contact with the pressure plate 400. The support provided by this embodiment is more suitable for high seismic intensity areas.

[0041] The present application also provides a bridge structure, including the bearing provided by any of the above embodiments. In some preferred implementations, the bearing can be a HDR (I) type high damping seismic isolation rubber bearing, a HDR (II) type high damping seismic isolation rubber bearing, a composite rubber bearing, etc.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of high damping seismic isolation rubber bearing, characterized in that: It comprises a first support plate (100), a support body (300) and a second support plate (200) which are arranged in sequence and overlap each other, the support body (300) being fixed between the first support plate (100) and the second support plate (200), one of the first support plate (100) and the second support plate (200) being used to connect to a beam body (10), and the other being used to connect to a pier (20); The support further comprises a pressing plate (400), part of the pressing plate (400) being located on a side of the second support plate (200) close to the support body (300) and in contact with the second support plate (200), and part of the pressing plate (400) being located outside the second support plate (200) and being fixed to a pier (20) or a beam body (10) corresponding to the second support plate (200) via a connecting member (500).

2. According to claim 1, the novel high damping seismic isolation rubber bearing is characterized in that: The pressing plate (400) is provided with a plurality of evenly arranged first clamping parts (410), and the second support plate (200) is provided with a plurality of evenly arranged second clamping parts (210), the first clamping parts (410) and the second clamping parts (210) are arranged in the same direction and are arranged facing each other, and the first clamping parts (410) are used for clamping and cooperating with the second clamping parts (210); In the arrangement direction of the first clamping parts (410), a plurality of the first clamping parts (410) are arranged from the edge of the pressure plate (400) close to the support body (300) toward the connecting part (500), and a plurality of the second clamping parts (210) are arranged from the edge of the second support plate (200) close to the connecting part (500) toward the support body (300).

3. According to claim 2, the novel high damping seismic isolation rubber bearing is characterized in that: The length of the first clamping component (410) is smaller than that of the second clamping component (210); the first clamping component (410) is movable relative to the second clamping component (210) along its length direction; and the moving direction of the first clamping component (410) is perpendicular to the arrangement direction of the plurality of first clamping components (410).

4. According to claim 3, the novel high damping seismic isolation rubber bearing is characterized in that: At least two of the pressure plates (400) are provided, and the pressure plates (400) are divided into a first type of pressure plate (420) and a second type of pressure plate (430), wherein the plurality of first clamping parts (410) corresponding to the first type of pressure plate (420) are arranged along a first direction, and the plurality of first clamping parts (410) corresponding to the second type of pressure plate (430) are arranged along a second direction, and the first direction is arranged perpendicular to the second direction.

5. According to claim 4, the novel high damping seismic isolation rubber bearing is characterized in that: At least one pressing plate (400) is correspondingly arranged on any side edge of the second support plate (200).

6. The novel high damping seismic isolation rubber bearing according to claim 1 is characterized in that: The support further comprises a support member (600), wherein the support member (600) is used for supporting between the pier (20) and the pressure plate (400), and the thickness of the support member (600) is the same as the thickness of the second support plate (200).

7. The novel high damping seismic isolation rubber bearing according to claim 6 is characterized in that: The pressing plate (400) and the supporting member (600) are integrally formed; and / or the connecting member (500) passes through the pressing plate (400) and the supporting member (600) at the same time.

8. The novel high damping seismic isolation rubber bearing according to claim 1 is characterized in that: The support further comprises a positioning member (700), wherein the positioning member (700) is configured to be pre-buried in the pier (20) or the beam body (10), and the positioning member (700) is used to position and install the connecting member (500).

9. The novel high damping seismic isolation rubber bearing according to claim 1 is characterized in that: The support body (300) is a structural component made of a high-damping rubber material or a structural component made of a natural rubber material.

10. The novel high damping seismic isolation rubber bearing according to claim 9 is characterized in that: The first support plate (100) comprises a first sealing layer steel plate (110) and a first support steel plate (120) which are overlapped and fixed, and the second support plate (200) comprises a second sealing layer steel plate (220) and a second support steel plate (230) which are overlapped and fixed, the first sealing layer steel plate (110) and the second sealing layer steel plate (220) are both vulcanized and fixed to the support body (300), and the second support steel plate (230) is in contact with and cooperates with the pressing plate (400); Alternatively, the first support plate (100) comprises a first sealing steel plate (110), the second support plate (200) comprises a second sealing steel plate (220), and the second sealing steel plate (220) is in contact with and cooperates with the pressing plate (400).

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