Bridge expansion joint

Abstract

The utility model provides a bridge expansion joint. The bridge expansion joint comprises two main bodies, a rubber strip and two strip-shaped air bags, wherein the two main bodies are fixed to the two sides of a bridge preformed groove correspondingly; the rubber strip is arranged between the two main bodies; the adjacent side faces of the two main bodies are each provided with an upper protruding part and a lower protruding part, so that a groove structure is formed. The two strip-shaped air bags are respectively arranged in the two groove structures; moreover, the two sides of the rubber strip are inserted into the two groove structures respectively, located on the lower side of the strip-shaped air bag and provided with extension parts, and the extension parts extend upwards and are bent towards the openings of the grooves so as to wrap the outer side of the strip-shaped air bag. And when the adhesive tape needs to be replaced, the air in the strip-shaped air bag is released, so that the strip-shaped air bag can be folded, and the pressure borne by the adhesive tape is eliminated. According to the bridge expansion joint, the adhesive tape can be rapidly replaced, and the bridge maintenance efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bridge engineering components, and particularly relates to a bridge expansion joint. BACKGROUND

[0002] The bridge expansion joint refers to a stretching device arranged between two beam ends, between a beam end and an abutment or at a hinged position of a bridge to meet the requirements of bridge deck deformation. The main function of the bridge expansion joint is to adapt to the displacement and deformation of the bridge structure caused by factors such as temperature change, concrete shrinkage, creep and vehicle load, to avoid cracks or damage caused by deformation constraints and to ensure the comfort and safety of driving.

[0003] In the prior art, in order to prevent water, dust and sundries from entering the bridge expansion joint, one (or more) rubber strip is usually added in the bridge expansion joint, and the high elasticity of the rubber material is used to adapt to the expansion and deformation of the bridge deck caused by temperature change, so as to ensure the effective filling effect of the bridge expansion joint.

[0004] The inventor finds that the service life of the rubber strip is much shorter than that of the bridge expansion joint, so the rubber strip needs to be replaced when the bridge is maintained. However, since the rubber strip is tightly embedded in the gap after being stretched and unfolded, manually taking out the rubber strip will consume a lot of time and energy, and is prone to cause damage to the rubber strip. CONTENT OF THE UTILITY MODEL

[0005] The embodiment of the application provides a bridge expansion joint, which aims to quickly replace the rubber strip and improve the bridge maintenance efficiency.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows:

[0007] The application provides a bridge expansion joint, which comprises two main bodies for being fixed on two sides of a bridge reserved groove respectively, and a rubber strip arranged between the two main bodies; the adjacent side surfaces of the two main bodies are each provided with an upper protruding part and a lower protruding part, and a groove structure is formed between the upper protruding part, the lower protruding part and the main body; the bridge expansion joint further comprises:

[0008] Two strip-shaped air bags are arranged in the two groove structures respectively;

[0009] The two sides of the rubber strip are inserted into the two groove structures respectively, and are located at the lower side of the strip-shaped air bag; the two sides of the rubber strip are each provided with an extension part, the extension part extends upward and is bent towards the opening of the groove structure, so as to be wrapped around the outer side of the strip-shaped air bag;

[0010] When the strip-shaped air bag is in an inflated state, the outer wall of the strip-shaped air bag abuts against the rubber strip and the extension part, so that the rubber strip abuts against the inner wall of the groove structure and the movement of the rubber strip relative to the main body is limited.

[0011] In a possible implementation, the strip-shaped air bag has a gas pipe communicating with the inside thereof at one side of the opening of the groove structure, and a plug is detachably connected to the gas pipe.

[0012] In a possible implementation, a reserved hole is formed in the upper protruding part and communicates with the groove structure, for the gas pipe to pass through.

[0013] In a possible implementation, the protruding end of the lower protruding part has a limiting part extending upward.

[0014] In a possible implementation, a plurality of shaping rods are fixedly arranged on the inner wall of the strip-shaped air bag and extend along the length direction of the main body.

[0015] When the shaping rods are at least two, the plurality of shaping rods are arranged at intervals along the circumferential direction of the strip-shaped air bag.

[0016] In a possible implementation, the upper protruding part has an upper positioning hole extending through in the up-down direction, and the lower protruding part has a lower positioning hole extending through in the up-down direction and coaxially arranged with the upper positioning hole.

[0017] The elongated part has an upper alignment hole extending through in the up-down direction and adapted to communicate with the upper positioning hole, and the two sides of the rubber strip each have a lower alignment hole extending through in the up-down direction and adapted to communicate with the lower positioning hole on the same side.

[0018] The main body further comprises:

[0019] A locking member is inserted into the upper positioning hole, the upper alignment hole, the lower alignment hole and the upper alignment hole which communicate with each other, to limit the movement of the rubber strip relative to the main body.

[0020] In a possible implementation, the locking member comprises:

[0021] A locking bolt is adapted to pass through the upper positioning hole, the upper alignment hole, the lower alignment hole and the upper alignment hole from top to bottom and extend out; and

[0022] A stop nut is threadedly connected to the extending end of the locking bolt to abut against the lower side surface of the lower protruding part.

[0023] In a possible implementation, the stop nut is fixedly connected to the lower side surface of the lower protruding part and communicates with the lower positioning hole.

[0024] In a possible implementation, the upper side surface of the upper protruding part is provided with a sunken groove adapted for the head of the locking bolt to embed into.

[0025] In one possible implementation, the strip-shaped airbag has a clearance hole that runs vertically through the airbag and is suitable for the insertion of the locking member.

[0026] In this embodiment, by combining the sides of the uninflated strip airbag and the adhesive strip, with the adhesive strip and extension portion positioned on the upper and lower sides of the strip airbag respectively, the preparation for installing the adhesive strip is completed. Subsequently, the adhesive strip of the combined strip airbag is inserted into the groove structure on the corresponding side, and the strip airbag is inflated, causing the strip airbag to bulge and the adhesive strip and extension portion to abut against the lower and upper protrusions respectively, thus completing the installation of the adhesive strip.

[0027] When the rubber strip needs to be replaced, the gas inside the strip airbag is released, which will cause the strip airbag to retract and relieve the pressure on the rubber strip.

[0028] The bridge expansion joint provided in this embodiment, compared with the prior art, enables rapid replacement of the rubber strips and improves the maintenance efficiency of the bridge. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A three-dimensional structural schematic diagram of a bridge expansion joint provided in an embodiment of this application;

[0031] Figure 2 for Figure 1 Front view;

[0032] Figure 3 for Figure 1 Top view;

[0033] Figure 4 For along Figure 3 Cross-sectional view of line AA in the middle;

[0034] Figure 5 This is a three-dimensional structural diagram of the strip-shaped airbag used in the embodiments of this application;

[0035] Figure 6 This is a cross-sectional view of the strip-shaped airbag used in the embodiments of this application;

[0036] Figure 7 This is a cross-sectional structural diagram of the main body used in the embodiments of this application;

[0037] Figure 8A cross-sectional structure diagram of the adhesive strip used in the embodiments of the present application is shown in the figure;

[0038] Reference signs: 1, main body; 2, adhesive strip; 21, extension; 211, upper alignment hole; 22, lower alignment hole; 3, strip-shaped air bag; 31, inflation pipe; 311, plug; 32, shaping rod; 33, avoiding hole; 4, upper protruding part; 41, reserved hole; 42, upper positioning hole; 43, sunken groove; 5, lower protruding part; 51, limiting part; 52, lower positioning hole; 6, locking piece; 61, locking bolt; 62, stop nut. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0040] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0041] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0042] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0043] Please refer to Figures 1 to 7 , the bridge expansion joint provided by the present application will be described. The bridge expansion joint proposed in the present application comprises two main bodies 1, an adhesive strip 2, and two strip-shaped air bags 3.

[0044] The two main bodies 1 are used to be fixed on the two sides of the bridge reserved groove respectively, and the adhesive strip 2 is arranged between the two main bodies 1, used to close the space between the two main bodies 1.

[0045] The upper protruding part 4 and the lower protruding part 5 are arranged on the adjacent sides of the two main bodies 1, specifically, the upper protruding part 4 and the lower protruding part 5 are arranged in parallel along the up-down direction, both extend along the length direction of the main body 1, and protrude towards the other main body 1.

[0046] The upper protruding part 4, the lower protruding part 5 and the main body 1 form a groove structure, and the opening of the groove structure faces the other main body 1.

[0047] The two strip-shaped air bags 3 are arranged in the two groove structures respectively, and both extend along the length direction of the main body 1. In actual use, gas or liquid can be filled into the strip-shaped air bag 3 to achieve the technical purpose of making the surface of the strip-shaped air bag 3 bulge and keep the bulging state.

[0048] In the combination, the two sides of the rubber strip 2 can be inserted into the two groove structures respectively, and the rubber strip 2 is arranged at the lower side of the strip-shaped air bag 3. In addition, the two sides of the rubber strip 2 are provided with an extension part 21 extending along the length direction of the rubber strip 2, the extension part 21 extends upwards and bends towards the opening of the groove structure to form a bent body structure wrapped outside the strip-shaped air bag 3.

[0049] When the strip-shaped air bag 3 is in the inflated state, the outer wall of the strip-shaped air bag 3 abuts against the rubber strip 2 and the extension part 21, so that the rubber strip 2 abuts against the inner wall of the groove structure and limits the movement of the rubber strip 2 relative to the main body 1.

[0050] In the embodiment, the strip-shaped air bag 3 in the un-inflated state and the side edges of the rubber strip 2 are combined, so that the rubber strip 2 and the extension part 21 are arranged at the upper and lower sides of the strip-shaped air bag 3 respectively, and the preparation work of installing the rubber strip 2 is completed. Then, the rubber strip 2 of the strip-shaped air bag 3 in the combined state is inserted into the groove structure on the corresponding side, and the strip-shaped air bag 3 is inflated, so that the strip-shaped air bag 3 bulges, and the rubber strip 2 and the extension part 21 abut against the lower protruding part 5 and the upper protruding part 4 respectively, and the installation work of the rubber strip 2 is completed.

[0051] When the rubber strip 2 needs to be replaced, the gas in the strip-shaped air bag 3 is released, so that the strip-shaped air bag 3 is retracted to eliminate the pressure on the rubber strip 2, and the difficulty of extracting the rubber strip 2 is reduced.

[0052] Compared with the prior art, the bridge expansion joint provided in the embodiment realizes the quick replacement of the rubber strip 2, and improves the maintenance efficiency of the bridge.

[0053] In some embodiments, as shown in Figure 4 and Figure 5 the side of the strip-shaped air bag 3 facing the opening of the groove structure is provided with an inflation pipe 31 communicating with the inside of the strip-shaped air bag 3, and a plug 311 for closing the inflation pipe 31 is detachably connected to the inflation pipe 31.

[0054] Since the inflation pipe 31 is arranged towards the opening of the groove structure, it is convenient to adjust and control so as to regularly inflate the strip-shaped air bag 3, and avoid the situation that the rubber strip 2 is loose due to the air tightness problem of the strip-shaped air bag 3.

[0055] In some embodiments, as shown in Figure 4 and Figure 7 , a reserved hole 41 is arranged on the upper protruding part 4, which is in communication with the groove structure and used for the inflation pipe 31 to pass through.

[0056] By adopting the above technical scheme, on the one hand, the inflation pipe 31 is inserted into the reserved hole 41 to realize the positioning of the strip-shaped air bag 3 relative to the upper protruding part 4; on the other hand, the reserved hole 41 can position the inflation pipe 31 so as to facilitate the operator to find and adjust.

[0057] In some embodiments, as shown in Figure 7 , the protruding end of the lower protruding part 5 has a limiting part 51 extending upward, which can reduce the opening of the groove structure as mentioned above, and at the same time reduce the space size of the groove structure itself, so as to further extrude the strip-shaped air bag 3, so as to avoid the strip-shaped air bag 3 from separating from the groove structure, and improve the structural stability of the device.

[0058] In some embodiments, as shown in Figure 7 , a plurality of shaping rods 32 extending along the length direction of the main body 1 are fixedly arranged on the inner wall of the strip-shaped air bag 3; after the strip-shaped air bag 3 is inflated, the shaping rods 32 abut at the joint of the rubber strip 2 and the extension part 21, or the bending part of the extension part 21 through the surface of the strip-shaped air bag 3, so as to ensure that it can be stably attached to the inner wall of the groove structure.

[0059] When the shaping rod 32 has at least two, the plurality of shaping rods 32 are arranged in a circumferential direction of the strip-shaped air bag 3.

[0060] In some embodiments, as shown in Figure 7 and Figure 8 , the upper protruding part 4 has an upper positioning hole 42 penetrating in the up-down direction, and the lower protruding part 5 has a lower positioning hole 52 penetrating in the up-down direction and coaxially arranged with the upper positioning hole 42.

[0061] Based on this, in the embodiment, each extension part 21 has an upper alignment hole 211 penetrating in the up-down direction, and the rubber strip 2 has a lower alignment hole 22 penetrating in the up-down direction on both sides; after the rubber strip 2 is installed on the main body 1 and limited by the strip-shaped air bag 3, the upper alignment hole 211 communicates with the upper positioning hole 42 on the same side, and the lower alignment hole 22 communicates with the lower positioning hole 52 on the same side, so as to form the upper positioning hole 42, the upper alignment hole 211, the lower alignment hole 22 and the upper alignment hole 211 arranged from top to bottom and coaxially arranged.

[0062] The main body 1 further comprises a locking part 6 which is inserted into the upper positioning hole 42, the upper alignment hole 211, the lower alignment hole 22 and the upper alignment hole 211 which are communicated with each other, so as to limit the movement of the rubber strip 2 relative to the main body 1, and the locking part 6 belongs to a reinforcing structure which has the same limiting effect based on the limiting mode of the strip-shaped air bag 3.

[0063] In some embodiments, as shown in Figure 5 The locking part 6 comprises a locking bolt 61 and a stop nut 62.

[0064] The locking bolt 61 is adapted to pass through the upper positioning hole 42, the upper alignment hole 211, the lower alignment hole 22 and the upper alignment hole 211 from top to bottom and extend out, and the head of the locking bolt 61 abuts against the upper side of the upper protruding part 4.

[0065] The stop nut 62 is threadedly connected to the extending end of the locking bolt 61 to abut against the lower side of the lower protruding part 5, so as to limit the movement of the locking bolt 61 along the axial direction of the locking bolt 61, to avoid the separation of the locking bolt 61 from the main body 1, and to ensure the structural stability of the locking part 6 in the use stage.

[0066] In some embodiments, as shown in Figure 4 and Figure 7 The stop nut 62 is fixedly connected to the lower side of the lower protruding part 5 and communicates with the lower positioning hole 52.

[0067] In actual use, the worker only needs to rotate the locking bolt 61 to complete the connection of the locking bolt 61 and the stop nut 62, so as to avoid the adjustment difficulty caused by the installation position of the stop nut 62 facing downward.

[0068] In some embodiments, as shown in Figure 7 The upper side of the upper protruding part 4 is provided with a sunken groove 43 which is coaxially communicated with the upper positioning hole 42 and is adapted to embed the head of the locking bolt 61, so as to realize the hidden installation of the head of the locking bolt 61.

[0069] In some embodiments, as shown in Figure 4 and Figure 6As shown, the strip-shaped air bag 3 is provided with an avoiding hole 33 penetrating in the up-down direction and suitable for the insertion of the locking member 6, and the avoiding hole 33 is not communicated with the inner cavity of the strip-shaped air bag 3; specifically, the inner peripheral wall of the avoiding hole 33 is provided with a circular tube connected with the upper and lower layers of the strip-shaped air bag 3, so as to avoid the medium in the strip-shaped air bag 3 from escaping from the avoiding hole 33.

[0070] By adopting the above technical scheme, on the one hand, the locking member 6 is inserted into the avoiding hole 33, so that the movement of the strip-shaped air bag 3 can be avoided; on the other hand, the avoiding hole 33 is provided, so that the strip-shaped air bag 3 can not interfere with the position design of the structure of the locking member 6.

[0071] The above is merely a preferred embodiment of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Bridge expansion joint comprising two main bodies for being fixed respectively on both sides of a bridge reserved slot, and a rubber strip arranged between the two main bodies; characterized in that, The upper and lower protruding parts are arranged on the adjacent sides of the two bodies, and the upper and lower protruding parts and the bodies form a groove structure; The bridge expansion joint further comprises: Two strip-shaped air bags are arranged in the two groove structures respectively; The two sides of the rubber strip are inserted into the two groove structures respectively and are located at the lower side of the strip-shaped air bag; the two sides of the rubber strip are provided with an extension part which extends upward and is bent towards the opening of the groove structure to wrap around the outer side of the strip-shaped air bag; When the strip-shaped air bag is in an inflated state, the outer wall of the strip-shaped air bag abuts against the rubber strip and the extension part, so that the rubber strip abuts against the inner wall of the groove structure and the movement of the rubber strip relative to the body is limited.

2. The bridge expansion joint of claim 1, wherein, The side of the strip-shaped air bag towards the opening of the groove structure is provided with an inflation pipe which communicates with the inside of the strip-shaped air bag, and a plug is detachably connected to the inflation pipe.

3. The bridge expansion joint of claim 2, wherein, A reserved hole is formed in the upper protruding part and communicates with the groove structure and is used for the inflation pipe to pass through.

4. The bridge expansion joint of claim 1, wherein, The protruding end of the lower protruding part is provided with a limiting part which extends upward.

5. The bridge expansion joint of claim 1, wherein The inner wall of the strip-shaped air bag is fixedly provided with a plurality of shaping rods which extend along the length direction of the body; When the shaping rods are at least two, the plurality of shaping rods are arranged at intervals along the circumferential direction of the strip-shaped air bag.

6. The bridge expansion joint of claim 1, wherein The upper protruding part is provided with an upper positioning hole which penetrates in the up-down direction, and the lower protruding part is provided with a lower positioning hole which penetrates in the up-down direction and is coaxially arranged with the upper positioning hole; The extension part is provided with an upper alignment hole which penetrates in the up-down direction and is adapted to communicate with the upper positioning hole, and the two sides of the rubber strip are provided with a lower alignment hole which penetrates in the up-down direction and is adapted to communicate with the lower positioning hole on the same side; The body further comprises: A locking member is inserted into the upper positioning hole, the upper alignment hole, the lower alignment hole and the upper alignment hole which communicate with each other to limit the movement of the rubber strip relative to the body.

7. The bridge expansion joint of claim 6, wherein, The locking member comprises: A locking bolt which is adapted to pass through the upper positioning hole, the upper alignment hole, the lower alignment hole and the upper alignment hole from top to bottom and extends out; and A stop nut which is threadedly connected to the extending end of the locking bolt to abut against the lower side of the lower protruding part.

8. The bridge expansion joint of claim 7, wherein, The stop nut is fixedly connected to the lower side of the lower protruding part and communicates with the lower positioning hole.

9. The bridge expansion joint of claim 7, wherein, The upper side of the upper protruding part is provided with a sunken groove which is adapted to embed the head of the locking bolt.

10. A bridge expansion joint as claimed in any one of claims 6 to 9, wherein, The strip-shaped air bag is provided with an avoidance hole which penetrates in the up-down direction and is adapted to insert the locking member.

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