Blocking type anti-aging rubber support body

Abstract

The utility model belongs to a bridge support, and particularly relates to a blocking type anti-aging rubber support body. Comprising stiffening steel plates which are horizontally arranged and longitudinally distributed in a rubber layer at intervals. An anti-aging ring is longitudinally distributed and annularly arranged in the rubber layer on the outer side of the edge of the stiffening steel plate, the anti-aging ring comprises a bag cavity used for containing an anti-aging material and the anti-aging material arranged in the bag cavity, and the bag cavity is made of a flexible material which can be vulcanized with the rubber layer into a whole. The rubber support can effectively solve the problem of deterioration of the rubber support in the prior art, and has the advantages that cracks on the surface of the support can be effectively prevented from extending inwards, the deterioration process of the rubber support body is delayed or prevented, the structure is simple, and manufacturing and construction are simple and easy to implement.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the manufacture of bridge bearing, especially a kind of blocking type anti-aging rubber bearing body. BACKGROUND

[0002] Rubber bearing is an important structural component of bridge superstructure, and plays an important role in bearing load, transmitting displacement and appropriate corner in bridge. To ensure that rubber bearing can play normal function in bridge service life, in addition to meeting the basic physical and mechanical performance indicators specified in standard, rubber bearing should also have excellent anti-aging performance.

[0003] The main performance of plate type rubber bearing in normal use is that the outer surface of rubber protective layer cracks, steel plate rusts, interlayer debonding and crushing in bearing occur. The outer surface crack of rubber protective layer is mainly caused by surface tensile strain and rubber surface aging. Steel plate rusting and interlayer debonding are caused by the fact that the surface crack of bearing penetrates the rubber protective layer, the inner steel plate contacts the air and rusts. Crushing is caused by serious debonding, bending fracture and serious rusting of steel plate in bearing. The appearance of crushing phenomenon indicates that the steel plate loses the effect of reinforcement, the bearing loses the function, and a large amount of manpower and material resources need to be invested when the plate type rubber bearing is replaced. Sometimes, traffic needs to be blocked, which not only causes a large amount of resource waste, but also brings inconvenience to people's travel. The development speed of crack depends on the formula of rubber material and the strain level of rubber surface. Test research shows that the internal causes of rubber aging include the weakness of high molecular material structure, such as chemical composition, molecular chain structure and physical structure; and the influence of additives, such as antioxidant, plasticizer, crosslinking agent and organic solvent. The external causes of rubber aging mainly include the action of oxygen and ozone and the strain level of rubber surface.

[0004] The commonly used method at present includes installing protective cover on the outer surface of bearing. The outer protective cover of bearing is generally prepared by adding additives to a single material to meet the main function. However, in actual use, bearing often faces the working condition under the coupling of multiple factors, and may face multiple influencing factors, such as acid, alkali environment, aging, marine atmospheric corrosion and bumping in construction. Over a long period of time, cracks are easy to form on the surface, which may cause rust of bearing and result in the attenuation or loss of the function of bearing. This makes the existing outer protective cover of bridge bearing have poor mechanical properties, low anti-aging performance, and easy to produce internal cracks during service, and the cracks are easy to aggravate and expand, resulting in short service life of the outer protective cover of bridge bearing.

[0005] The applicant has not found any similar or similar documents reported by searching. SUMMARY

[0006] The utility model discloses a kind of blocking type ageing-resistant rubber support bodies, by the structural design of ageing-resistant ring being arranged in the rubber layer of stiffened steel plate edge outside, effectively prevent support surface crack extends inward, substantially reduce the replacement probability of support caused by steel plate corrosion and internal interlayer degumming.

[0007] The overall technical concept of the utility model is:

[0008] Blocking type ageing-resistant rubber support body, including stiffened steel plate being horizontally arranged and longitudinally spaced distribution in rubber layer;Ageing-resistant ring is longitudinally distributed and arranged along annular in the rubber layer of stiffened steel plate edge outside, and ageing-resistant ring includes the cavity for accommodating ageing-resistant material, ageing-resistant material in cavity, cavity is made of flexible material that can be vulcanized with rubber layer.

[0009] The specific technical concept of the utility model also includes:

[0010] Ageing-resistant material is preferably selected from one of liquid silicone, polyurethane, liquid silicone rubber and acrylic ester liquid rubber, which has stable properties and can be easily placed in cavity by pressurized injection.

[0011] Cavity is made of flexible material that can be vulcanized with rubber layer, and preferably, cavity is made of rubberized cord fabric and / or rubber.

[0012] Filling port is provided on the cavity for injecting ageing-resistant material. In order to meet the structural strength of filling port and facilitate the connection between filling port and cavity, filling port is preferably made of metal material.

[0013] In order to avoid the adhesion of inner wall of cavity, the preferred technical implementation means is that the adjacent inner surfaces of the cavities are provided with a separation layer to prevent adhesion.

[0014] The separation layer is made of a material that does not chemically react with the cavity material and does not adhere under the condition of not exceeding 200℃. The more preferred technical implementation means includes but is not limited to ordinary paper, isolation paper, plastic cloth and the like, which do not deviate from the essence of the utility model.

[0015] The utility model can be made by the following method:

[0016] A. Fold the flexible material that can be vulcanized with rubber layer into a stack structure of corresponding height according to the height of rubber support body, and set a separation layer between the inner walls of adjacent stack structures to prevent adhesion.

[0017] B, the outer edge of the laminated structure is bonded by cold bonding and / or thermal bonding to form a capsule cavity which is annular as a whole and closed inside;

[0018] C, a hole is opened on one side of the capsule cavity and a filling port is installed;

[0019] D, the lower protective layer film or the lower steel plate and the side protective layer film of the support are placed in the mold, the side protective layer film is opened and aligned with the reserved hole of the mold;

[0020] E, the capsule cavity with the filling port in step C is placed in the mold, and the filling port is inserted into the reserved hole of the mold;

[0021] F, the inner rubber layer, the stiffened steel plate, the upper protective layer film or the upper steel plate are sequentially placed in the mold, and the upper cover of the mold is covered, and then high-temperature pressurization vulcanization is carried out;

[0022] G, after vulcanization, the mold is taken out and inspected;

[0023] H, after inspection, the aging-resistant material is injected into the capsule cavity through the filling port by using a pressurizing pump, and the aging-resistant material is solidified or the filling port is blocked to form the blocking type aging-resistant rubber support body.

[0024] The technical progress achieved by the utility model lies in:

[0025] 1, the aging-resistant ring is arranged in the rubber layer outside the edge of the stiffened steel plate, which can effectively prevent the surface cracks of the support from extending inward, delay or prevent the deterioration process of the rubber support body, and greatly reduce the replacement probability of the support caused by steel plate corrosion and internal interlayer delamination.

[0026] 2, the aging-resistant material is arranged in the aging-resistant ring made of rubber, lining cloth and other materials, and the applicant's test proves that: first, the tensile property of the aging-resistant material is higher than that of rubber, and when the support is subjected to shear force, the aging-resistant material can always play a blocking effect, isolating the support body from the external environment, effectively slowing down or isolating the damage of high temperature, ozone or water vapor and other adverse conditions in the natural environment to the support body, delaying the aging speed of the support body, thereby greatly improving the service life of the rubber support; second, the ozone resistance of the aging-resistant material is much higher than that of the rubber support material, and when the rubber layer of the support is cracked by ozone, the internal rubber can be effectively protected, and the deterioration process of the rubber support body is blocked.

[0027] 3, the aging-resistant ring and the support body are formed by one-time vulcanization, and the preparation method is simple and easy to operate, and the liquid aging-resistant material can be conveniently placed in the aging-resistant ring by pressurized injection, and the construction is simple and easy to operate. BRIEF DESCRIPTION OF DRAWINGS

[0028] The utility model has the following drawings:

[0029] Figure 1It is the longitudinal section structure schematic view of the utility model.

[0030] Figure 2 It is the cross section structure schematic view of the utility model.

[0031] Figure 3 It is Figure 2 The I part local enlarged view.

[0032] Figure 4 It is the structure schematic view of the blocking type aging resistant rubber support body applied to the four fluorine sliding plate type rubber support.

[0033] Figure 5 It is the structure schematic view of the blocking type aging resistant rubber support body applied to the shock absorption and isolation rubber support.

[0034] The reference signs in the drawings are as follows:

[0035] 1, aging resistant ring, 1A, capsule cavity, 1B, aging resistant material, 1C, isolation layer, 1D, filling port, 2, rubber layer, 3, stiffened steel plate, 4, lower sealing layer steel plate, 5, support lower steel plate, 6, lower embedded steel plate, 7, bolt, 8, upper sealing layer steel plate, 9, support upper steel plate, 10, upper embedded steel plate, 11, anchoring assembly, 12, polytetrafluoroethylene plate. DETAILED DESCRIPTION

[0036] The drawings show the embodiments of the utility model, the following will be further described with the drawings to the embodiments of the utility model, but should not be understood as the limitation of the utility model, the protection scope of the utility model is with the content recorded in the claims as the standard, any equivalent technical means replacement according to the specification, all do not deviate from the protection scope of the utility model.

[0037] Example 1

[0038] The overall structure of this embodiment is as shown in Figures 1-3 The blocking type aging resistant rubber support body includes the stiffened steel plate 3 arranged horizontally and longitudinally spaced in the rubber layer 2, the aging resistant ring 1 is arranged in the rubber layer 2 outside the edge of the stiffened steel plate 3 and is longitudinally distributed and arranged along the ring, the aging resistant ring 1 includes the capsule cavity 1A for accommodating the aging resistant material 1B, the aging resistant material 1B is arranged in the capsule cavity 1A, and the capsule cavity 1A is made of rubberized cord.

[0039] The blocking type aging resistant rubber support body prepared in this embodiment can be used to prepare the plate type rubber support, and the structure is as shown in Figure 1 .

[0040] Example 2

[0041] The overall structure of this embodiment is as shown in Figure 4As shown in the drawing, a polytetrafluoroethylene plate 12 is arranged on the upper surface of the aging-resistant rubber support body made in Embodiment 1, and a four-fluoride sliding plate type rubber support is made.

[0042] Embodiment 3

[0043] The overall structure of this embodiment is as shown in the drawing. Figure 5 As shown in the drawing, an upper sealing layer steel plate 8 and a lower sealing layer steel plate 4 are arranged on the upper and lower surfaces of the aging-resistant rubber support body respectively, the upper sealing layer steel plate 8 and the lower sealing layer steel plate 4 are integrally formed with the aging-resistant rubber support body by one-time vulcanization, the upper sealing layer steel plate 8 is fixed with a support upper steel plate 9 by bolts 7, and the support upper steel plate 9 is fixed with an upper embedded steel plate 10 by an anchoring assembly 11; the lower sealing layer steel plate 4 is fixed with a support lower steel plate 5 by bolts 7, and the support lower steel plate 5 is fixed with a lower embedded steel plate 6 by bolts 7, thereby making a seismic mitigation rubber support. When the support bears horizontal load, the rubber layer and the internal stiffening steel plate 3 are protected by the upper sealing layer steel plate 8 and the lower sealing layer steel plate 4, so that the rubber layer can achieve a large overall lateral displacement without instability, and can better adapt to the expansion and contraction of the beam body. At the same time, the support, the beam body and the pier are connected by bolts, so that the energy transmitted to the beam body during an earthquake is reduced, and the beam body and the pier can be effectively prevented from being damaged.

[0044] To verify the technical effect of the embodiment, the applicant has carried out the following tests:

[0045] I. Ozone aging resistance test

[0046]

[0047] The test proves that the ozone resistance of the polyurethane aging-resistant material is much higher than that of the rubber support material, and when the rubber of the support protective layer is cracked by ozone, the internal rubber can be effectively protected, the aging effect is blocked, and the deterioration process of the support body is effectively delayed.

[0048] II. Heat air aging test

[0049]

[0050] The test shows that the performance change rate of the polyurethane aging-resistant material after heat aging is lower than that of the rubber material for the support, that is, the aging process of the polyurethane aging-resistant material is slower, and its aging-resistant life is longer. The aging phenomenon of the support can be effectively extended to the internal rubber.

Claims

1. A blocking type of ageing-resistant rubber bearing body comprising stiffening steel plates (3) arranged horizontally and longitudinally spaced in a rubber layer (2); characterized in that The rubber layer (2) outside the edge of the stiffened steel plate (3) is longitudinally distributed and annularly arranged with an anti-aging ring (1), which comprises a cavity (1A) for containing an anti-aging material (1B), the anti-aging material (1B) is arranged in the cavity (1A), and the cavity (1A) is made of flexible material which can be vulcanized with the rubber layer (2).

2. The blocking type of aging-resistant rubber bearing body according to claim 1, characterized in that The anti-aging material (1B) is selected from one of liquid silicone, polyurethane, liquid silicone rubber and acrylate liquid rubber.

3. The blocking type of aging resistant rubber bearing body according to claim 1, characterized in that The cavity (1A) is made of rubberized cord fabric and / or rubber.

4. The blocking type of aging resistant rubber bearing body according to claim 1, characterized in that A filling port (1D) for injecting the anti-aging material (1B) is arranged on the cavity (1A) and communicates with the outside.

5. Blocking type weather-resistant rubber bearing body according to any one of claims 1-4, characterized in that An isolation layer (1C) is arranged between the inner surfaces of adjacent cavities (1A) to prevent adhesion.

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