Main pipe flange fastener and main pipe flange expander

Abstract

The utility model relates to the technical field of flange sealing ring replacement auxiliary tools, and discloses a main pipe flange fastener and a main pipe flange expander. The main pipe flange fastener includes a holder and an arc-shaped clamping plate, the holder is provided with an arc-shaped clamping groove, one end of the arc-shaped clamping plate is hinged on the holder, and the other end is provided with a clamping port, a limiting space is formed between the arc-shaped clamping plate and the arc-shaped clamping groove, a clamping screw is rotatably mounted on the holder, a clamping nut is threadedly connected to the clamping screw, and an operating handle is vertically mounted on the upper end of the clamping nut. The main pipe flange expander of the utility model has a simple structure, low manufacturing cost, high material strength, and low maintenance cost; it effectively improves the handling efficiency of vehicle pipe system leakage failures, reduces the vehicle removal and temporary repair rate, and provides a strong guarantee for railway transportation safety.

Description

Technical Field

[0001] The utility model relates to the technical field of flange sealing ring replacement auxiliary tools, in particular to a main pipe flange fastener and a main pipe flange expander. Background Art

[0002] Flange joints are key components of railway vehicle brake pipe systems, and leakage of flange joints is one of the factors that threaten the safety of railway trucks. Railway truck brake pipe systems mainly use flange joints and E-shaped sealing rings for sealing. Since the sealing rings are affected by various pressures and temperatures during operation, the materials are prone to aging and hardening over time, leading to failure and loss of the proper self-sealing performance. Therefore, the sealing rings need to be replaced in a timely manner. In the use and maintenance operations, the replacement process of the sealing rings of the main pipe flanges is very time-consuming and labor-intensive, and the risks are relatively high. If the concentric positioning of the main pipes at both ends of the flange is not maintained during replacement, it is easy to cause the rubber rings to be squeezed and damaged during installation due to the phenomenon of the main pipes at both ends of the flange being different and torque. In order to improve work efficiency, better adapt to the specific environment on site, reduce the difficulty and risk factor of fault handling, solve the time-consuming and labor-intensive problems in fault handling, and efficiently complete the fault handling work, a main pipe flange fastener and main pipe flange expander have been developed. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a main pipe flange fastener and a main pipe flange expander to solve the problems pointed out in the above background technology.

[0004] In order to achieve the above utility model purpose, the technical solution adopted is as follows:

[0005] The main pipe flange fastener comprises a clamping seat and an arc-shaped clamping plate, wherein the clamping seat is provided with an arc-shaped clamping groove, one end of the arc-shaped clamping plate is hinged on the clamping seat, and the other end is provided with a clamping opening, a limiting space is formed between the arc-shaped clamping plate and the arc-shaped clamping groove, a clamping screw is rotatably mounted on the clamping seat, a clamping nut sleeve is threadedly connected to the clamping screw, and an operating handle is vertically mounted on the upper end of the clamping nut sleeve.

[0006] As a further improvement of the utility model, a mounting groove is provided on the clamping seat, and the lower end of the clamping screw is rotatably mounted in the mounting groove via a rotating shaft.

[0007] As a further improvement of the utility model, an anti-dropping protrusion is fixed to the end of the operating handle.

[0008] The main pipe flange expander comprises the main pipe flange fastener as described above, and also comprises an adjusting screw, one end of which is fixed with a top block, and the other end of which passes through a first threaded hole on the main pipe flange fastener and is fixedly connected with a hexagonal bolt head.

[0009] A main pipe flange expander comprises a main pipe flange fastener as described in any of the above items, wherein two main pipe flange fasteners are arranged in parallel, and further comprises two symmetrically arranged adjusting screws, one end of the adjusting screw is fixedly connected to one main pipe flange fastener, and the other end is fixed with a sprocket after passing through a second threaded hole on the other main pipe flange fastener, the two sprockets are driven and connected by a connecting chain, and a hexagonal bolt head is fixedly connected to the middle of one of the sprockets.

[0010] As a further improvement of the utility model, the connecting chain between the two sprockets is in a relaxed state. When in use, the main pipe flange expander is fixed to the main pipe by the main pipe flange fastener. At this time, the main pipe is located in the limited space formed between the arc-shaped clamping plate and the arc-shaped clamping groove. The connecting chain must be in a relaxed state to make room for the main pipe accommodating space, thereby realizing the normal use of the connecting chain.

[0011] The beneficial effects of the utility model are:

[0012] 1. The main pipe flange expander of the utility model has a simple structure, low manufacturing cost, high material strength and low maintenance cost;

[0013] 2. Convenient operation, fast expansion, easy operation in limited space, reducing the difficulty of personnel cooperation and shortening the processing time;

[0014] 3. The concentric positioning of the main pipes at both ends of the flange is achieved, with good stability and convenient operation in limited space; the potential risks of rubber ring extrusion and damage caused by the main pipes at both ends of the flange and torque during the installation of the E-type sealing ring are reduced to a greater extent;

[0015] 4. It has the reliability and stability of fault handling, which effectively improves the efficiency of handling vehicle pipe leakage faults, reduces the rate of vehicle removal for temporary repairs, and provides a strong guarantee for railway transportation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of the structure of the main pipe flange fastener of the utility model;

[0018] Figure 2 for Figure 1 A magnified image of

[0019] Figure 3 It is a structural schematic diagram of a one-way main pipe flange expander;

[0020] Figure 4It is a structural schematic diagram of a bidirectional main pipe flange expander.

[0021] In the figure: 1. main pipe flange fastener, 2. holder, 3. arc-shaped clamping plate, 4. arc-shaped clamping groove, 5. bayonet, 6. limit space, 7. clamping screw, 8. clamping screw sleeve, 9. operating handle, 10. mounting groove, 11. rotating shaft, 12. anti-dropping clamping cam, 13. adjusting screw, 14. top block, 15. first threaded hole, 16. hexagonal bolt head, 17. second threaded hole, 18. sprocket, 19. connecting chain. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0024] Example 1

[0025] like Figure 1-2 As shown, the main pipe flange fastener includes a base 2 and an arc-shaped clamping plate 3, the base 2 is provided with an arc-shaped clamping groove 4, one end of the arc-shaped clamping plate 3 is hinged on the base 2, and the other end is provided with a clamping socket 5, a limiting space 6 is formed between the arc-shaped clamping plate 3 and the arc-shaped clamping groove 4, a clamping screw 7 is rotatably mounted on the base 2, a clamping nut 8 is threadedly connected to the clamping screw 7, an operating handle 9 is vertically mounted on the upper end of the clamping nut 8, and the outer diameter of the clamping nut 8 is larger than the size of the clamping socket 5.

[0026] The clamping base 2 is provided with a mounting groove 10 , and the lower end of the clamping screw 7 is rotatably mounted in the mounting groove 10 via a rotating shaft 11 .

[0027] An anti-dropping protrusion 12 is fixed to the end of the operating handle 9 .

[0028] Example 2

[0029] like Figure 3 As shown, the main pipe flange expander includes the main pipe flange fastener 1 as described in any of the above items, and also includes an adjusting screw 13, one end of which is fixed with a top block 14, and the other end of which passes through a first threaded hole 15 on the main pipe flange fastener 1 and is fixedly connected with a hexagonal bolt head 16.

[0030] The main pipe flange expander disclosed in this embodiment is a one-way main pipe flange expander. When the main pipe flange (except the tee) leaks air, the one-way main pipe flange expander is used. The operation method during use is as follows:

[0031] (1) Close the shut-off valve of this vehicle and exhaust the remaining air in the auxiliary air cylinder; close the corner valves at both ends of this vehicle and the corner valves of the adjacent vehicle and exhaust the remaining air under the main pressure of this vehicle.

[0032] (2) Loosen the angle plug on the air leakage side of the flange and the U-shaped clip of the main pipe.

[0033] (3) Loosen the main pipe flange nuts (do not remove the bolts).

[0034] (4) Install the one-way main pipe expander on the main pipe at the nearest large crossbeam or pillow beam (inside and outside ends as appropriate). During installation, the hexagonal bolt head 16 faces the outside of the vehicle body. By using a hexagonal wrench to operate the hexagonal bolt head 16, the gap at the main pipe flange interface can be quickly expanded, making it easier to replace the sealing ring.

[0035] (5) After the replacement is completed, remove the flange expander, tighten the flange body nut, open the angle plug and the cut-off plug to fill the air, use the leak detection agent to test and pass, tighten the angle plug and the main U-shaped clamp nut for a simple test, and the operation is completed.

[0036] The characteristics of the one-way expander are: simple process, low production cost, high material strength, low maintenance cost. It is easy to operate, expand quickly, and is easy to operate in a limited space, which reduces the difficulty of joint labor cooperation between personnel, realizes the purpose of single-person operation, and shortens the processing time.

[0037] Example 3

[0038] like Figure 4 As shown, the main pipe flange expander includes the main pipe flange fastener 1 as described in any of the above items, wherein two main pipe flange fasteners 1 are provided in parallel, and further include two symmetrically arranged adjusting screws 13, one end of the adjusting screw 13 is fixedly connected to one main pipe flange fastener 1, and the other end passes through a second threaded hole 17 on the other main pipe flange fastener 1 and is fixed with a sprocket 18, the two sprockets 18 are driven and connected by a connecting chain 19, and a hexagonal bolt head 16 is fixedly connected to the middle of one sprocket 18.

[0039] The connecting chain 19 between the two sprockets 18 is in a relaxed state. When in use, the main pipe flange expander is fixed to the main pipe by the main pipe flange fastener 1. At this time, the main pipe is located in the limiting space 6 formed between the arc-shaped clamping plate 3 and the arc-shaped clamping groove 4. The connecting chain 19 must be in a relaxed state to make room for the main pipe accommodating space and realize the normal use of the connecting chain 19.

[0040] The main pipe flange expander disclosed in this embodiment is a two-way main pipe flange expander. There is air leakage at the main pipe tee. The two-way main pipe flange expander is used. The operation method when using it is as follows:

[0041] (1) Close the shut-off valve of this vehicle and exhaust the remaining air in the auxiliary air cylinder; close the corner valves at both ends of this vehicle and the corner valves of the adjacent vehicle and exhaust the remaining air under the main pressure of this vehicle.

[0042] (2) Loosen the angle plug on the air leakage side of the flange and the U-shaped clip of the main pipe.

[0043] (3) Loosen the main pipe flange nuts (do not remove the bolts).

[0044] (4) Install the two-way main pipe flange expander. During installation, the hexagonal bolt head 16 faces the outside of the vehicle body. By using a hexagonal wrench to operate the hexagonal bolt head 16, the gap at the main pipe flange interface can be quickly expanded with the cooperation of the connecting chain 19 and the sprocket 18, so that the two adjusting screws 13 can be extended and retracted synchronously, so that the main pipe flange interface can be expanded smoothly until the E-type sealing ring at the interface can be removed and replaced.

[0045] (5) After the replacement is completed, remove the flange expander, tighten the flange body nut, open the angle plug and the cut-off plug to fill the air, use the leak detection agent to test it, and then tighten the angle plug and the main U-shaped clamp nut for a simple test. The operation is completed.

[0046] The characteristics of the bidirectional expander are: simple process, low production cost, high material strength, and low maintenance cost. It realizes the concentric positioning of the main pipes at both ends of the flange, has good stability, and is easy to operate in limited space. It greatly reduces the potential risks of rubber ring extrusion and damage caused by the phenomenon of the main pipes at both ends of the flange and torque when installing the E-type sealing ring.

[0047] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, component splitting or combination, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. Main pipe flange fastener, characterized by: It includes a base and an arc-shaped clamping plate, the base is provided with an arc-shaped clamping groove, one end of the arc-shaped clamping plate is hinged on the base, and the other end is provided with a clamping opening, a limiting space is formed between the arc-shaped clamping plate and the arc-shaped clamping groove, a clamping screw is rotatably installed on the base, a clamping screw sleeve is threadedly connected to the clamping screw, and an operating handle is vertically installed on the upper end of the clamping screw sleeve.

2. The main pipe flange fastener according to claim 1, characterized in that: The clamping seat is provided with an installation groove, and the lower end of the clamping screw is rotatably installed in the installation groove through a rotating shaft.

3. The main pipe flange fastener according to claim 1, characterized in that: An anti-dropping protrusion is fixed to the end of the operating handle.

4. Main pipe flange expander, characterized by: It comprises the main pipe flange fastener as claimed in any one of claims 1 to 3, and also comprises an adjusting screw, one end of which is fixed with a top block, and the other end of which passes through a first threaded hole on the main pipe flange fastener and is fixedly connected with a hexagonal bolt head.

5. Main pipe flange expander, characterized by: It comprises the main pipe flange fastener as described in any one of claims 1 to 4, wherein two main pipe flange fasteners are arranged in parallel, and further comprises two symmetrically arranged adjusting screws, one end of the adjusting screw is fixedly connected to one main pipe flange fastener, and the other end passes through a second threaded hole on the other main pipe flange fastener and is fixed with a sprocket, the two sprockets are driven and connected by a connecting chain, and a hexagonal bolt head is fixedly connected to the middle of one of the sprockets.

6. The main pipe flange expander according to claim 5, characterized in that: The connecting chain between the two sprockets is in a slack state.

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