Air bag hoop type force transmission key

Abstract

The utility model provides an air bag hoop type force transmission key. The air bag hoop type force transmission key comprises a first hoop, a second hoop, a supporting column and an air bag supporting assembly. The first hoop is connected with the second hoop, and a containing cavity is formed between the first hoop and the second hoop; one end of the supporting column is movably arranged in the containing cavity, and the other end of the supporting column penetrates out of the containing cavity and is used for abutting against an external first wall. The air bag supporting assembly is arranged in the containing cavity, one end of the air bag supporting assembly abuts against the supporting column, and the other end of the air bag supporting assembly is used for abutting against an external second wall. The air bag supporting assembly is inflated, expands and pushes the supporting column, so that the supporting column and the air bag supporting assembly abut against the first external wall body and the second external wall body respectively. The air bag hoop type force transmission key has the advantage of being high in bearing capacity, and therefore the potential safety hazard that a traditional adjustable supporting force transmission key loses efficacy due to reverse rotation under the action of large loads is avoided.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to an airbag clamp-type force transmission key. Background Technology

[0002] During the construction of prefabricated railway stations, after the supporting structure is removed, the force transmission key can effectively transfer the soil pressure borne by the diaphragm wall to the assembled precast components. Currently used force transmission keys are of the positive and negative threaded rod type, utilizing the telescopic and adjustable tightening function of the positive and negative threaded rods to directly transfer the soil pressure on the foundation pit retaining structure to the precast components. For example, Chinese patent CN217500234U discloses a top plate force transmission key, which is a positive and negative threaded rod type. This top plate force transmission key includes a support stud, one end of which is threaded to a support sleeve with internal threads. A steel plate is welded to the end of the support sleeve away from the support stud, and another end of the support stud is threaded to a pre-embedded sleeve with internal threads. By manually unscrewing the support stud from the pre-embedded sleeve while simultaneously turning the exposed part of the support sleeve into the support sleeve, and after the steel plate of the support sleeve is fully in contact with the diaphragm wall, a wrench can be used for tightening. However, this force transmission key has the following problems: First, it has poor load-bearing capacity and may have the safety hazard of reverse rotation failure under heavy load, resulting in the inability to effectively transmit force. For example, paragraphs 9-11 of the specification of Chinese patent CN212838893U mention the problem of "slippage or breakage of the installation bolts of the telescopic device". This is due to the long-term impact of heavy-duty vehicles, wheel crushing, and high-frequency vibration, which caused the bolts to loosen and the nuts to fall off. After that, they were not repaired in time, which eventually led to the installation bolts slipping or breaking. Stripped or broken bolts can cause reverse rotation failure. For example, paragraph 2 of the specification of Chinese patent CN201090583Y mentions that "bolts used to connect moving parts on machines, such as main bearings, connecting rods, and flywheels, are precision-machined unidirectional full-thread bolts on the screw body, especially hexagonal head bolts, which are widely used. In practical applications, due to machine impacts, vibrations, or variable loads, the friction between the threads may decrease or disappear instantaneously. Repeated occurrences of this phenomenon can cause the threads of the screw and nut to come off, resulting in bolt connection failure." The statement "Loosening and connection failure can cause minor technical malfunctions in equipment or even serious accidents" illustrates that threaded connections can fail under heavy loads, leading to the safety hazard of reverse rotation failure. Secondly, the system requires workers to operate in confined spaces and use jacks, posing a cumbersome operational challenge. Thirdly, the system only monitors the axial force of a limited number of key components, resulting in incomplete axial force monitoring. Fourthly, the installation method using rotating forward and reverse threaded rods for the key components is time-consuming, extending the construction period.

[0003] Therefore, it is necessary to provide at least one airbag clamp-type force transmission key with high load-bearing capacity and easy and convenient operation. Utility Model Content

[0004] The purpose of this utility model is to provide an airbag clamp-type force transmission key with high load-bearing capacity and simple and convenient operation.

[0005] To achieve the above objectives, this utility model provides an airbag clamp-type force transmission key, including a first clamp, a second clamp, a support column, and an airbag support assembly; the first clamp is connected to the second clamp, and a receiving cavity is provided between the first clamp and the second clamp; one end of the support column is movably disposed in the receiving cavity, and the other end of the support column extends out of the receiving cavity and is used to press against an external first wall; the airbag support assembly is disposed in the receiving cavity, one end of the airbag support assembly abuts against the support column, and the other end of the airbag support assembly is used to press against an external second wall; by inflating the airbag support assembly and pushing against the support column, the support column and the airbag support assembly respectively press against the external first wall and the external second wall.

[0006] Preferably, the first clamp includes a first connecting portion, a first arc-shaped portion, and a second connecting portion, the first connecting portion being connected to one side of the first arc-shaped portion, and the second connecting portion being connected to the other side of the first arc-shaped portion; the second clamp includes a third connecting portion, a second arc-shaped portion, and a fourth connecting portion, the third connecting portion being connected to one side of the second arc-shaped portion, and the fourth connecting portion being connected to the other side of the second arc-shaped portion; the first connecting portion is connected to the third connecting portion, the second connecting portion is connected to the fourth connecting portion, and the first arc-shaped portion and the second arc-shaped portion surround the accommodating cavity.

[0007] Preferably, the first connecting part and the third connecting part are connected by a first bolt.

[0008] Preferably, the second connecting part and the fourth connecting part are connected by a second bolt.

[0009] Preferably, the airbag support assembly includes a pressure-bearing airbag and an airbag support member. The pressure-bearing airbag is disposed in the accommodating cavity, and one end of the pressure-bearing airbag abuts against the support column. The other end of the pressure-bearing airbag is connected to the airbag support member, and the airbag support member is used to press against the external second wall.

[0010] Preferably, the airbag support has a groove recessed into the accommodating cavity, and the pressure-bearing airbag is provided with an air pipe connector, which passes through the airbag support and is inserted into the groove.

[0011] Preferably, the air pipe connector is connected to an external air supply line, which is used to supply air to the pressure-bearing airbag.

[0012] Preferably, the airbag support has an opening or slot for the external air supply line to pass through.

[0013] Preferably, there is a gap between the first clamp and the second clamp for the external air supply line to pass through.

[0014] Preferably, the support column includes a support body and a limiting support. One end of the support body is disposed in the receiving cavity, and the other end of the support body extends out of the receiving cavity and is connected to the limiting support.

[0015] Compared with existing technologies, the load-bearing capacity of the airbag clamp-type force transmission key of this utility model is composed of the static friction of the first and second clamps and the supporting force of the airbag support assembly. Related studies have shown that the overall stiffness and load-bearing capacity of the clamp-type structure are higher than those of the steel wedge-type movable end and the single-cylinder jack support movable head. Therefore, the airbag clamp-type force transmission key of this utility model has the characteristic of high load-bearing capacity, thereby avoiding the safety hazard of reverse rotation failure of traditional adjustable support force transmission keys under large loads. Secondly, the airbag clamp-type force transmission key of this utility model achieves sliding elongation of the support column and provides prestress through the inflation and expansion of the airbag support assembly, thereby adapting to the spacing between prefabricated components and the foundation pit structure under different working conditions. It also avoids the need for workers to operate in confined spaces and the use of jacks. Therefore, the airbag clamp-type force transmission key of this utility model is easy and convenient to operate. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the airbag clamp-type force transmission key of this utility model.

[0017] Figure 2 This is a front view of the airbag clamp-type force transmission key of this utility model after removing part of the first clamp structure.

[0018] Figure 3 This is a structural diagram showing the connection between the first and second clamps of the airbag clamp-type force transmission key of this utility model. Detailed Implementation

[0019] To explain in detail the technical content, structural features, objectives and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0020] Please see Figures 1 to 3The airbag clamp-type force transmission key 100 of this utility model includes a first clamp 1, a second clamp 2, a support column 3, and an airbag support assembly 4; the first clamp 1 is connected to the second clamp 2, and a receiving cavity 5 is provided between the first clamp 1 and the second clamp 2; one end of the support column 3 is movably disposed in the receiving cavity 5, and the other end of the support column 3 extends out of the receiving cavity 5 and is used to press against the external first wall (not shown in the figure); the airbag support assembly 4 is disposed in the receiving cavity 5, one end of the airbag support assembly 4 abuts against the support column 3, and the other end of the airbag support assembly 4 is used to press against the external second wall (not shown in the figure); by inflating the airbag support assembly 4 and pushing the support column 3, the support column 3 and the airbag support assembly 4 press against the external first wall and the external second wall respectively. By using the support column 3 and the airbag support assembly 4 to press against the first external wall and the second external wall respectively, the airbag clamp-type force transmission key 100 of this utility model can quickly and effectively support the first external wall and the second external wall, so that the earth pressure borne by the diaphragm wall can be effectively transmitted between the first external wall and the second external wall.

[0021] In one embodiment, one of the external first wall and the external second wall is a prefabricated component, while the other of the external first wall and the external second wall is a foundation pit structure, but this is not a limitation.

[0022] Please see Figure 3 In one embodiment, the first clamp 1 includes a first connecting portion 11, a first arcuate portion 12, and a second connecting portion 13. The first connecting portion 11 is connected to one side of the first arcuate portion 12, and the second connecting portion 13 is connected to the other side of the first arcuate portion 12. The second clamp 2 includes a third connecting portion 21, a second arcuate portion 22, and a fourth connecting portion 23. The third connecting portion 21 is connected to one side of the second arcuate portion 22, and the fourth connecting portion 23 is connected to the other side of the second arcuate portion 22. The first connecting portion 11 is connected to the third connecting portion 21, and the second connecting portion 13 is connected to the fourth connecting portion 23. The first arcuate portion 12 and the second arcuate portion 22 surround an accommodating cavity 5. Specifically, the first connecting portion 11 and the third connecting portion 21 are connected by a first bolt 6; the second connecting portion 13 and the fourth connecting portion 23 are connected by a second bolt 7. The first clamp 1 and the second clamp 2 are connected together by the first bolt 6 and the second bolt 7. Therefore, the tightness of the connection between the first clamp 1 and the second clamp 2 can be adjusted by adjusting the first bolt 6 and the second bolt 7.

[0023] Please see Figure 1 and Figure 2In one embodiment, the airbag support assembly 4 includes a pressure-bearing airbag 41 and an airbag support member 42. The pressure-bearing airbag 41 is disposed within the accommodating cavity 5, with one end of the pressure-bearing airbag 41 abutting against the support column 3, and the other end of the pressure-bearing airbag 41 connected to the airbag support member 42. The airbag support member 42 is used to press against the external second wall. Further, the airbag support member 42 has a groove 421 recessed into the accommodating cavity 5, and the pressure-bearing airbag 41 is provided with an air pipe connector 411, which passes through the airbag support member 42 and is inserted into the groove 421. By providing a recessed groove 421 on the airbag support 42 that faces into the accommodating cavity 5, the air pipe connector 411 of the pressure-bearing airbag 41 is accommodated through the groove 421. Simultaneously, this prevents the air pipe connector 411 from being pressed against the external second wall when the airbag support 42 is pressed against it, thus ensuring effective air supply to the pressure-bearing airbag 41 through the air pipe connector 411. Furthermore, the air pipe connector 411 is connected to an external air supply line (not shown in the figure), which is used to supply air to the pressure-bearing airbag 41.

[0024] In one embodiment, the airbag support 42 is provided with an opening (not shown) or a slot (not shown) for an external air supply line to pass through. The external air supply line can pass through the opening or slot on the airbag support 42 into the corresponding groove 421 of the airbag support 42, so as to facilitate the connection of the external air supply line to the air pipe connector 411 of the pressure-bearing airbag 41.

[0025] In one embodiment, a gap 8 is provided between the first clamp 1 and the second clamp 2 for an external air supply line to pass through. After one end of the external air supply line is connected to the air pipe connector 411 of the pressure-bearing airbag 41, the other end of the external air supply line can first pass through the opening or slot on the airbag support 42, and then through the gap 8 between the first clamp 1 and the second clamp 2, thereby connecting to an external air source device (not shown in the figure).

[0026] Please see Figure 2 In one embodiment, the support column 3 includes a support body 31 and a limiting support 32. One end of the support body 31 is disposed within the receiving cavity 5, and the other end of the support body 31 extends out of the receiving cavity 5 and is connected to the limiting support 32. The diameter of the limiting support 32 is larger than the diameter of the support body 31, thus preventing the entire support column 3 from falling into the receiving cavity 5. At the same time, the limiting support 32 can be used to press against the external second wall.

[0027] Combination Figures 1 to 3 The specific working principle of the airbag clamp-type force transmission key 100 of this utility model is as follows:

[0028] Before installation, the pressure-bearing airbag 41 of the airbag support assembly 4 is installed in the accommodating cavity 5 between the first clamp 1 and the second clamp 2. Then, most of the support column 3 is installed in the accommodating cavity 5, leaving a small part of the support column 3 exposed. Then, the first connecting part 11 of the first clamp 1 and the third connecting part 21 of the second clamp 2 are connected together by the first bolt 6. The second connecting part 13 of the second clamp 2 and the fourth connecting part 23 of the second clamp 2 are connected together by the second bolt 7. However, the first bolt 6 and the second bolt 7 are kept slightly loose, so that the first clamp 1 and the second clamp 2 are not completely locked.

[0029] When installing the airbag clamp-type force transmission key 100, a high-precision measuring device is used to accurately position the installation location of the airbag clamp-type force transmission key 100 to ensure its accurate connection with the foundation pit structure. The pressure-bearing airbag 41 of the airbag support assembly 4 is inflated until the support column 3 and the airbag support member 42 of the airbag support assembly 4 simultaneously press against the external first wall (e.g., precast side wall) and the external second wall (e.g., diaphragm wall), providing a certain prestress. Finally, the first bolt 6 and the second bolt 7 are tightened, and the first clamp 1 and the second clamp 2 tightly hold the support, ultimately achieving force transmission.

[0030] During later monitoring and maintenance, air pressure monitoring equipment will be installed to monitor the stress state of the airbag clamp-type force transmission key 100 in real time, ensuring safety during construction. A construction quality monitoring system will be established to monitor and evaluate the installation quality of the airbag clamp-type force transmission key 100 in real time. A later maintenance plan for the airbag clamp-type force transmission key 100 will be developed, including regular inspections, cleaning, and necessary maintenance.

[0031] In summary, the load-bearing capacity of the airbag clamp-type force transmission key 100 of this utility model consists of the static friction force of the first clamp 1 and the second clamp 2 and the supporting force of the airbag support component 4. Related research shows that the overall stiffness and load-bearing capacity of the clamp-type structure are higher than those of the steel wedge-type movable end and the single-cylinder jack support movable head. Therefore, the airbag clamp-type force transmission key 100 of this utility model has a high load-bearing capacity, thus avoiding the safety hazard of reverse rotation failure under large loads in traditional adjustable support force transmission keys. Secondly, the airbag clamp-type force transmission key 100 of this utility model achieves sliding elongation of the support column 3 and provides prestress through the inflation and expansion of the airbag support component 4, thereby adapting to the spacing between prefabricated components and the foundation pit structure under different working conditions. It also avoids the need for workers to operate in confined spaces and the use of jacks. Therefore, the airbag clamp-type force transmission key 100 of this utility model is easy and convenient to operate. Furthermore, the airbag clamp-type force transmission key 100 of this utility model features comprehensive and convenient axial force monitoring. The pressure-bearing airbag 41 of the airbag support component 4 provides air pressure monitoring, enabling timely monitoring of the axial force loss of the force transmission key or the internal force of the foundation pit, thus avoiding the limitation of traditional force transmission keys that only monitor the axial force of a limited number of keys. By installing an air pressure monitoring device below the pressure-bearing airbag 41, the monitoring function can begin comprehensive real-time axial force monitoring in the shortest possible time. Moreover, the airbag clamp-type force transmission key 100 of this utility model, through the airbag support component 4, allows the pressure-bearing airbag 41 of the airbag support component 4 to expand rapidly through a simple inflation operation. Compared to the traditional method of installing force transmission keys by rotating the forward and reverse threaded rods, this significantly shortens the installation time required for the force transmission key, enabling faster force transmission and saving construction time.

[0032] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model application shall still fall within the scope of the present utility model.

Claims

1. A type of airbag clamp-type force transmission key, characterized in that, The device includes a first clamp, a second clamp, a support column, and an airbag support assembly. The first clamp is connected to the second clamp, and a receiving cavity is provided between the first clamp and the second clamp. One end of the support column is movably disposed within the receiving cavity, and the other end of the support column extends out of the receiving cavity and is used to press against an external first wall. The airbag support assembly is disposed within the receiving cavity, with one end of the airbag support assembly abutting against the support column, and the other end of the airbag support assembly pressing against an external second wall. By inflating the airbag support assembly and pushing against the support column, the support column and the airbag support assembly respectively press against the external first wall and the external second wall.

2. The airbag clamp-type force transmission key according to claim 1, characterized in that, The first clamp includes a first connecting part, a first arc-shaped part, and a second connecting part. The first connecting part is connected to one side of the first arc-shaped part, and the second connecting part is connected to the other side of the first arc-shaped part. The second clamp includes a third connecting part, a second arc-shaped part, and a fourth connecting part. The third connecting part is connected to one side of the second arc-shaped part, and the fourth connecting part is connected to the other side of the second arc-shaped part. The first connecting part is connected to the third connecting part, and the second connecting part is connected to the fourth connecting part. The first arc-shaped part and the second arc-shaped part surround the accommodating cavity.

3. The airbag clamp-type force transmission key according to claim 2, characterized in that, The first connecting part and the third connecting part are connected by a first bolt.

4. The airbag clamp-type force transmission key according to claim 2, characterized in that, The second connecting part and the fourth connecting part are connected by a second bolt.

5. The airbag clamp-type force transmission key according to claim 1, characterized in that, The airbag support assembly includes a pressure-bearing airbag and an airbag support member. The pressure-bearing airbag is disposed in the accommodating cavity, and one end of the pressure-bearing airbag abuts against the support column. The other end of the pressure-bearing airbag is connected to the airbag support member. The airbag support member is used to press against the external second wall.

6. The airbag clamp-type force transmission key according to claim 5, characterized in that, The airbag support has a groove recessed into the accommodating cavity, and the pressure-bearing airbag is provided with an air pipe connector, which passes through the airbag support and is inserted into the groove.

7. The airbag clamp-type force transmission key according to claim 6, characterized in that, The air pipe connector is connected to an external air supply line, which is used to supply air to the pressure-bearing airbag.

8. The airbag clamp-type force transmission key according to claim 7, characterized in that, The airbag support is provided with openings or slots for the external air supply pipeline to pass through.

9. The airbag clamp-type force transmission key according to claim 7, characterized in that, There is a gap between the first clamp and the second clamp for the external air supply pipeline to pass through.

10. The airbag clamp-type force transmission key according to claim 1, characterized in that, The support column includes a support body and a limiting support. One end of the support body is disposed in the accommodating cavity, and the other end of the support body extends out of the accommodating cavity and is connected to the limiting support.

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