CN214939219U - Modularized sealing system - Google Patents
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- CN214939219U CN214939219U CN202022136466.8U CN202022136466U CN214939219U CN 214939219 U CN214939219 U CN 214939219U CN 202022136466 U CN202022136466 U CN 202022136466U CN 214939219 U CN214939219 U CN 214939219U
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Abstract
The utility model provides a modularized sealing system, which comprises a rubber pad (1) and a sealing ring (2), wherein the rubber pad (1) is of a cake-shaped structure, and the sealing ring (2) is fixed at the circumferential position of the upper surface of the rubber pad (1) through vulcanization; the sealing ring (2) comprises a plurality of sealing units (21), the sealing units (21) are circumferentially connected to form an annular structure, the sealing units (21) are elastic units, and a joint surface between the sealing units (21) is an arc surface or a step surface or a combination of the arc surface and the step surface. The design can be satisfied only according to the sealed unit quantity of the increase and decrease of rubber pad diameter size to the support of different tonnages, and sealed unit can carry out batch production, greatly reduced support's manufacturing cost.
Description
Technical Field
The utility model relates to a bridge beam supports field, concretely relates to sealed system.
Background
Bridges are generally composed of a superstructure, a substructure, a support and an attachment structure. The bridge bearing is an important component for connecting and restraining the upper and lower structures of the bridge and is an indispensable part for bearing the weight of the bridge. Bridge beam supports structure is various, and basin formula rubber support is the most common among them, has good shock attenuation effect. The inner sealing ring and the rubber pad in the basin-type rubber support are used as important components, and the selection of materials and structures influences the quality of the rubber support and further influences the service life of a bridge.
The existing basin-type rubber support sealing ring mainly adopts brass. The accumulated slippage caused by the relative vibration between the basin wall of the basin-type rubber support and the sealing ring is small, and the wear mileage of the copper sealing ring is not long, so that the sealing effect and the service life are influenced, and the basin-type rubber support cannot be well suitable for supports with large rotation angles, frequent displacement and other requirements.
The existing basin-type rubber support sealing ring is composed of a plurality of opening rings, the diameters of copper sealing rings used for different rubber pad diameters, the cross sectional dimension and the number are different, a slotting structure is needed for the copper sealing ring with the larger cross sectional dimension, the design range of the existing basin-type rubber support is expanded to 100 t-10000 t, the diameter of a corresponding rubber pad is 200 mm-1500 mm, the diversity of the size is difficult to realize the batch production of the sealing ring, the production organization is inconvenient, the processing precision is difficult to guarantee, the production cost is higher, and the assembly is troublesome.
Disclosure of Invention
The utility model discloses a solve the current basin formula rubber support sealing washer among the prior art can not be good be applicable to the support that has requirements such as big corner, frequent displacement, the not long problem of copper seal circle wearing and tearing mileage provides a modularization sealing system, and above-mentioned problem has been solved to the sealing washer modularization mode through.
The utility model provides a modularized sealing system, which comprises a rubber pad and a sealing ring, wherein the rubber pad is of a cake-shaped structure, and the sealing ring is fixed at the circumferential position of the upper surface of the rubber pad through vulcanization; the sealing ring comprises a plurality of sealing units, the sealing units are connected in the circumferential direction to form an annular structure, the sealing units are elastic units, and the joint surface between the sealing units is an arc surface or a step surface or the combination of the arc surface and the step surface.
The sealing units are provided with concave-convex two curvature-variable contact surfaces, so that no gap is formed between the sealing units after the sealing system is formed in an interlocking manner, and the top edge of the rubber pad is prevented from being extruded and deformed from the gap to overflow the basin ring.
A sealed system of modularization, as preferred mode, sealed unit includes circumference sealing, radial seal, axial seal and connecting portion, the double-phase opposite of circumference sealing is the cambered surface that the surface shape is the same, unsmooth opposite and can mutually support in circumference sealing, connecting portion set up in circumference sealing one side cambered surface, axial seal and radial seal mutually perpendicular set up on circumference sealing and the adjacent double-phase adjacent face of two cambered surfaces.
The radial sealing part and the axial sealing part are used for mounting the sealing units in the axial direction and the radial direction, and the circumferential sealing parts are connected end to end and matched with a non-planar joint surface to form sealing. The connecting part is used for connecting two adjacent sealing units.
A sealed system of modularization, as preferred mode, the circumference sealing is hexahedron structure, and the circumference sealing includes circumference sealing body, first faying face and second faying face, and first faying face and second faying face set up relatively in axial sealing body both sides, and first faying face and second faying face are the variable curvature curved surface, and first faying face is convex curved surface, and the second faying face is concave curved surface.
The connecting surface is a variable-curvature curved surface (a concave surface and a convex surface), so that the system can be bent into a circle conveniently, no gap exists, and the circumferential distribution is matched with the rubber pad.
A sealed system of modularization, as preferred mode, circumference sealing still includes the connecting hole, the connecting hole is for setting up the counter bore on the second faying face, connecting hole and circumference sealing coaxial line.
A modularization sealing system, as preferred mode, connecting portion are protruding for setting up in first bonding surface and the wedge that mutually supports with the connecting hole.
The sealing unit is provided with a groove on the variable-curvature concave surface, the variable-curvature convex surface is provided with a connector, and the end part of the connector is wedge-shaped. The end part of the connector of the latter sealing unit is inserted into the groove of the variable-curvature concave surface of the former sealing unit, the two sealing units 5 form interlocking, and the sealing units are interlocked into a ring in this way and embedded at the edge of the rubber pad to form a sealing system.
A modularization sealing system, as preferred mode, circumference sealing part body includes first plane, second plane, third plane and fourth plane, second plane and fourth plane are connected respectively to the double-phase opposite side of first plane, are connected the third plane with the relative limit in first plane connection limit on the second plane, the fourth plane is connected with the relative limit in second plane connection limit.
A sealed system of modularization, as preferred mode, radial seal portion is platelike structure, radial seal portion one end sets up perpendicularly in one side that first plane and second plane are connected on the first plane, the face is the coplanar with the second plane on the radial seal portion.
A sealed system of modularization, as preferred mode, axial seal portion is platelike structure, axial seal portion one end sets up perpendicularly on the fourth plane one side that fourth plane and third plane are connected, axial seal portion goes up the face and is coplanar with the third plane.
A modularization sealing system, as preferred mode, sealed unit is made for polyvinylidene fluoride, PFA or polyformaldehyde material.
Polyvinylidene fluoride, PFA, polyformaldehyde and the like are adopted, the hardness, the strength and the rigidity are good, the self-lubricating property and the fatigue resistance are good, the elastic material is manufactured through injection molding, the limit of the top edge of the rubber pad can be effectively carried out, the top edge of the rubber pad is prevented from being extruded and deformed to form a basin ring, the cost is low, and the requirement of higher accumulated slippage can be met.
The utility model discloses beneficial effect as follows:
(1) the sealing ring is integrally formed by adopting a compression molding or profile processing mode, is easy to process, has high and controllable processing precision and better sealing effect;
(2) the sealing ring is made of a lubricating polytetrafluoroethylene composite material, has good hardness, strength and rigidity, has good self-lubricating property and good fatigue resistance, can effectively limit the top edge of the rubber pad, avoids the top edge of the rubber pad from being extruded and deformed out of a basin ring, and can meet the requirement of higher accumulated slippage.
(3) The design of the supports with different tonnages can be met only by increasing or decreasing the number of the sealing units according to the diameter of the rubber pad, the sealing units can be produced in batch, and the production cost of the supports is greatly reduced;
(4) the sealing system and the rubber pad are in a composite integral type, so that the influence of machining errors on the assembly quality is overcome, the quality is better guaranteed, the integral sealing performance is improved, and the integral assembly of the support is more convenient.
Drawings
FIG. 1 is a schematic view of a modular sealing system;
FIG. 2 is a schematic view of a modular sealing system sealing ring;
FIG. 3 is a three-view illustration of a modular sealing system sealing unit;
FIG. 4 is a schematic view of a modular seal system circumferential seal;
FIG. 5 is a schematic view of a modular seal system circumferential seal body.
Reference numerals:
1. a rubber pad; 2. a seal ring; 21. a sealing unit; 211. a circumferential seal portion; 2111. a circumferential seal part body; 21111. a first plane; 21112. a second plane; 21113. a third plane; 21114. a fourth plane; 22112. a first bonding surface; 2113. a second bonding surface; 2114. connecting holes; 212. a radial seal portion; 213. an axial seal portion; 214. a connecting portion.
Detailed Description
The technical solutions in the embodiments of the present invention will be made clear below by referring to the attached drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments.
Example 1
As shown in figure 1, the modularized sealing system comprises a rubber pad 1 and a sealing ring 2, wherein the rubber pad 1 is of a cake-shaped structure, and the sealing ring 2 is fixed on the circumferential position of the upper surface of the rubber pad 1 through vulcanization.
As shown in fig. 2, the sealing ring 2 includes a plurality of sealing units 21, the sealing units 21 are connected in a circumferential direction to form an annular structure, the sealing units 21 are elastic units, and a joint surface between the sealing units 21 is an arc surface.
As shown in fig. 3, the sealing unit 21 includes a circumferential sealing portion 211, a radial sealing portion 212, an axial sealing portion 213 and a connecting portion 214, wherein two opposite surfaces of the circumferential sealing portion 211 are arc surfaces with the same surface shape, opposite concave-convex shapes and capable of being matched with each other on the circumferential sealing portion 211, the connecting portion 214 is disposed on the arc surface on one side of the circumferential sealing portion 211, and the axial sealing portion 213 and the radial sealing portion 212 are disposed perpendicular to each other on two adjacent surfaces of the circumferential sealing portion 211 adjacent to the two arc surfaces.
As shown in fig. 4, the circumferential sealing portion 211 is a hexahedral structure, the circumferential sealing portion 211 includes a circumferential sealing portion body 2111, a first combining surface 2112, a second combining surface 2113, and a connecting hole 2114, the first combining surface 2112 and the second combining surface 2113 are oppositely disposed on two sides of the axial sealing portion 213 body, the first combining surface 2112 and the second combining surface 2113 are both variable curvature curved surfaces, the first combining surface 2112 is a convex curved surface, and the second combining surface 2113 is a concave curved surface. The connection hole 2114 is a counter bore provided on the second joint surface 2113, and the connection hole 2114 is coaxial with the circumferential seal portion 211.
The connection portion 214 is a wedge-shaped protrusion disposed on the surface of the first coupling surface 2112 and engaged with the connection hole 2114.
As shown in fig. 5, the circumferential seal portion body 2111 includes a first plane 21111, a second plane 21112, a third plane 21113, and a fourth plane 21114, the first plane 21111 connecting the second plane 21112 and the fourth plane 21114 at opposite sides thereof, respectively, the second plane 21112 connecting the third plane 21113 at a side opposite to the side connecting the first plane 21111, and the third plane 21113 connecting the fourth plane 21114 at a side opposite to the side connecting the second plane 21112.
The radial seal portion 212 is a plate-shaped structure, one end of the radial seal portion 212 is vertically disposed on the first plane 21111 on the side where the first plane 21111 is connected with the second plane 21112, and the upper plate surface of the radial seal portion 212 is coplanar with the second plane 21112.
The axial sealing portion 213 has a plate-like structure, one end of the axial sealing portion 213 is vertically disposed on the fourth plane 21114 at a side where the fourth plane 21114 is connected to the third plane 21113, and an upper plate surface of the axial sealing portion 213 is coplanar with the third plane 21113.
The sealing unit 21 is made of teflon.
The accumulated relative sliding distance between the existing copper sealing ring and the inner wall of the basin ring is not less than 1000m, and the accumulated relative sliding distance between the novel sealing ring and the inner wall of the basin ring is not less than 2000 m.
The sealing ring is arranged on the rubber pad, and the modularized sealing ring is embedded in the rubber pad through a vulcanization process to form a whole. Processing the rubber raw material, matching through the sizing material, mixing rubber, shaping cut-parts, sizing material examine soon, then assemble modularization sealing washer and rubber pad into wholly through the pressurization and vulcanize, maintain, overcome the influence of machining error to assembly quality, the better assurance of quality improves whole leakproofness, and the whole equipment of support is also more convenient.
The rubber gasket can be reliably and tightly connected with the sealing ring through a vulcanization process. In addition, the structure of the sealing ring has structural elasticity, the shape of the sealing ring can be fixed by a vulcanization process, the processing precision is ensured, and the assembly is convenient.
Example 2
As shown in figure 1, the modularized sealing system comprises a rubber pad 1 and a sealing ring 2, wherein the rubber pad 1 is of a cake-shaped structure, and the sealing ring 2 is fixed on the circumferential position of the upper surface of the rubber pad 1 through vulcanization.
As shown in fig. 2, the sealing ring 2 includes a plurality of sealing units 21, the sealing units 21 are circumferentially connected to form an annular structure, the sealing units 21 are elastic units, and a joint surface between the sealing units 21 is a stepped surface.
As shown in fig. 3, the sealing unit 21 includes a circumferential sealing portion 211, a radial sealing portion 212, an axial sealing portion 213 and a connecting portion 214, two opposite surfaces of the circumferential sealing portion 211 are stepped surfaces which have the same surface shape and opposite concave-convex shapes and can be matched with each other on the circumferential sealing portion 211, the connecting portion 214 is disposed on the stepped surface on one side of the circumferential sealing portion 211, and the axial sealing portion 213 and the radial sealing portion 212 are disposed perpendicular to each other on two adjacent surfaces of the circumferential sealing portion 211 adjacent to the two stepped surfaces.
As shown in fig. 4, the circumferential sealing portion 211 is a hexahedral structure, the circumferential sealing portion 211 includes a circumferential sealing portion body 2111, a first combining surface 2112, a second combining surface 2113, and a connecting hole 2114, the first combining surface 2112 and the second combining surface 2113 are oppositely disposed on two sides of the axial sealing portion 213 body, both the first combining surface 2112 and the second combining surface 2113 are three-step surfaces, the first combining surface 2112 is a convex step surface, and the second combining surface 2113 is a concave step surface. The connection hole 2114 is a counter bore provided on the second joint surface 2113, and the connection hole 2114 is coaxial with the circumferential seal portion 211.
The connection portion 214 is a wedge-shaped protrusion disposed on the surface of the first coupling surface 2112 and engaged with the connection hole 2114.
As shown in fig. 5, the circumferential seal portion body 2111 includes a first plane 21111, a second plane 21112, a third plane 21113, and a fourth plane 21114, the first plane 21111 connecting the second plane 21112 and the fourth plane 21114 at opposite sides thereof, respectively, the second plane 21112 connecting the third plane 21113 at a side opposite to the side connecting the first plane 21111, and the third plane 21113 connecting the fourth plane 21114 at a side opposite to the side connecting the second plane 21112.
The radial seal portion 212 is a plate-shaped structure, one end of the radial seal portion 212 is vertically disposed on the first plane 21111 on the side where the first plane 21111 is connected with the second plane 21112, and the upper plate surface of the radial seal portion 212 is coplanar with the second plane 21112.
The axial sealing portion 213 has a plate-like structure, one end of the axial sealing portion 213 is vertically disposed on the fourth plane 21114 at a side where the fourth plane 21114 is connected to the third plane 21113, and an upper plate surface of the axial sealing portion 213 is coplanar with the third plane 21113.
The sealing unit 21 is made of teflon.
The accumulated relative sliding distance between the existing copper sealing ring and the inner wall of the basin ring is not less than 1000m, and the accumulated relative sliding distance between the novel sealing ring and the inner wall of the basin ring is not less than 2000 m.
The sealing ring is arranged on the rubber pad, and the modularized sealing ring is embedded in the rubber pad through a vulcanization process to form a whole. Processing the rubber raw material, matching through the sizing material, mixing rubber, shaping cut-parts, sizing material examine soon, then assemble modularization sealing washer and rubber pad into wholly through the pressurization and vulcanize, maintain, overcome the influence of machining error to assembly quality, the better assurance of quality improves whole leakproofness, and the whole equipment of support is also more convenient.
The rubber gasket can be reliably and tightly connected with the sealing ring through a vulcanization process. In addition, the structure of the sealing ring has structural elasticity, the shape of the sealing ring can be fixed by a vulcanization process, the processing precision is ensured, and the assembly is convenient.
Example 3
As shown in figure 1, the modularized sealing system comprises a rubber pad 1 and a sealing ring 2, wherein the rubber pad 1 is of a cake-shaped structure, and the sealing ring 2 is fixed on the circumferential position of the upper surface of the rubber pad 1 through vulcanization.
As shown in fig. 2, the sealing ring 2 includes a plurality of sealing units 21, the sealing units 21 are circumferentially connected to form an annular structure, the sealing units 21 are elastic units, and a joint surface between the sealing units 21 is an arc-shaped stepped surface.
As shown in fig. 3, the sealing unit 21 includes a circumferential sealing portion 211, a radial sealing portion 212, an axial sealing portion 213 and a connecting portion 214, two opposite surfaces of the circumferential sealing portion 211 are arc-shaped stepped surfaces which have the same surface shape and opposite concave-convex shapes and can be engaged with each other on the circumferential sealing portion 211, the connecting portion 214 is disposed on the arc-shaped stepped surface on one side of the circumferential sealing portion 211, and the axial sealing portion 213 and the radial sealing portion 212 are disposed perpendicular to each other on two adjacent surfaces of the circumferential sealing portion 211 adjacent to the two arc-shaped stepped surfaces.
As shown in fig. 4, the circumferential sealing portion 211 is a hexahedral structure, the circumferential sealing portion 211 includes a circumferential sealing portion body 2111, a first combining surface 2112, a second combining surface 2113, and a connecting hole 2114, the first combining surface 2112 and the second combining surface 2113 are oppositely disposed on two sides of the axial sealing portion 213 body, the first combining surface 2112 and the second combining surface 2113 are both arc-shaped three-step surfaces, the first combining surface 2112 is a convex arc-shaped step surface, and the second combining surface 2113 is a concave arc-shaped step surface. The connection hole 2114 is a counter bore provided on the second joint surface 2113, and the connection hole 2114 is coaxial with the circumferential seal portion 211.
The connection portion 214 is a wedge-shaped protrusion disposed on the surface of the first coupling surface 2112 and engaged with the connection hole 2114.
As shown in fig. 5, the circumferential seal portion body 2111 includes a first plane 21111, a second plane 21112, a third plane 21113, and a fourth plane 21114, the first plane 21111 connecting the second plane 21112 and the fourth plane 21114 at opposite sides thereof, respectively, the second plane 21112 connecting the third plane 21113 at a side opposite to the side connecting the first plane 21111, and the third plane 21113 connecting the fourth plane 21114 at a side opposite to the side connecting the second plane 21112.
The radial seal portion 212 is a plate-shaped structure, one end of the radial seal portion 212 is vertically disposed on the first plane 21111 on the side where the first plane 21111 is connected with the second plane 21112, and the upper plate surface of the radial seal portion 212 is coplanar with the second plane 21112.
The axial sealing portion 213 has a plate-like structure, one end of the axial sealing portion 213 is vertically disposed on the fourth plane 21114 at a side where the fourth plane 21114 is connected to the third plane 21113, and an upper plate surface of the axial sealing portion 213 is coplanar with the third plane 21113.
The sealing unit 21 is made of teflon.
The accumulated relative sliding distance between the existing copper sealing ring and the inner wall of the basin ring is not less than 1000m, and the accumulated relative sliding distance between the novel sealing ring and the inner wall of the basin ring is not less than 2000 m.
The sealing ring is arranged on the rubber pad, and the modularized sealing ring is embedded in the rubber pad through a vulcanization process to form a whole. Processing the rubber raw material, matching through the sizing material, mixing rubber, shaping cut-parts, sizing material examine soon, then assemble modularization sealing washer and rubber pad into wholly through the pressurization and vulcanize, maintain, overcome the influence of machining error to assembly quality, the better assurance of quality improves whole leakproofness, and the whole equipment of support is also more convenient.
The rubber gasket can be reliably and tightly connected with the sealing ring through a vulcanization process. In addition, the structure of the sealing ring has structural elasticity, the shape of the sealing ring can be fixed by a vulcanization process, the processing precision is ensured, and the assembly is convenient.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (9)
1. A modular sealing system, characterized by: the rubber gasket comprises a rubber gasket (1) and a sealing ring (2), wherein the rubber gasket (1) is of a cake-shaped structure, and the sealing ring (2) is fixed at the circumferential position of the upper surface of the rubber gasket (1) through vulcanization; the sealing ring (2) comprises a plurality of sealing units (21), the sealing units (21) are circumferentially connected to form an annular structure, the sealing units (21) are elastic units, and a joint surface between the sealing units (21) is an arc surface or a step surface or a combination of the arc surface and the step surface.
2. A modular sealing system according to claim 1, wherein: the sealing unit (21) comprises a circumferential sealing part (211), a radial sealing part (212), an axial sealing part (213) and a connecting part (214), wherein two opposite surfaces of the circumferential sealing part (211) are cambered surfaces which are identical in surface shape, opposite in concave-convex property and capable of being matched with each other of the circumferential sealing part (211), the connecting part (214) is arranged on the cambered surface on one side of the circumferential sealing part (211), and the axial sealing part (213) and the radial sealing part (212) are perpendicular to each other and are arranged on two adjacent surfaces of the circumferential sealing part (211) and two adjacent cambered surfaces.
3. A modular sealing system according to claim 2, wherein: the sealing structure is characterized in that the circumferential sealing part (211) is of a hexahedral structure, the circumferential sealing part (211) comprises a circumferential sealing part body (2111), a first combining surface (2112) and a second combining surface (2113), the first combining surface (2112) and the second combining surface (2113) are oppositely arranged on two sides of the axial sealing part body (213), the first combining surface (2112) and the second combining surface (2113) are variable-curvature curved surfaces, the first combining surface (2112) is a convex curved surface, and the second combining surface (2113) is a concave curved surface.
4. A modular sealing system according to claim 3, wherein: the circumferential sealing part (211) further comprises a connecting hole (2114), the connecting hole (2114) is a counter bore arranged on the second joint surface (2113), and the connecting hole (2114) and the circumferential sealing part (211) are coaxial.
5. A modular sealing system according to claim 4, wherein: the connecting portion (214) is a wedge-shaped protrusion which is arranged on the surface of the first combining surface (2112) and is matched with the connecting hole (2114).
6. A modular sealing system according to claim 3, wherein: the circumferential sealing portion body (2111) comprises a first plane (21111), a second plane (21112), a third plane (21113) and a fourth plane (21114), wherein two opposite sides of the first plane (21111) are respectively connected with the second plane (21112) and the fourth plane (21114), the edge, opposite to the connecting edge of the first plane (21111), of the second plane (21112) is connected with the third plane (21113), and the edge, opposite to the connecting edge of the second plane (21112), of the third plane (21113) is connected with the fourth plane (21114).
7. A modular sealing system according to claim 6, wherein: the radial sealing portion (212) is of a plate-shaped structure, one end of the radial sealing portion (212) is vertically arranged on one side, connected with the first plane (21111) and the second plane (21112), of the first plane (21111), and the upper plate surface of the radial sealing portion (212) is coplanar with the second plane (21112).
8. A modular sealing system according to claim 7, wherein: the axial sealing portion (213) is of a plate-shaped structure, one end of the axial sealing portion (213) is vertically arranged on one side, connected with the third plane (21113), of the fourth plane (21114), and the upper plate surface of the axial sealing portion (213) is coplanar with the third plane (21113).
9. A modular sealing system according to claim 1, wherein: the sealing unit (21) is made of polyvinylidene fluoride, PFA or polyformaldehyde materials.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022136466.8U CN214939219U (en) | 2020-09-25 | 2020-09-25 | Modularized sealing system |
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| CN202022136466.8U CN214939219U (en) | 2020-09-25 | 2020-09-25 | Modularized sealing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112283350A (en) * | 2020-09-25 | 2021-01-29 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Modularized sealing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112283350A (en) * | 2020-09-25 | 2021-01-29 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Modularized sealing system |
| CN112283350B (en) * | 2020-09-25 | 2023-01-13 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Modularized sealing system |
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