Exhaust dustproof check device suitable for distribution valve of passenger train

Abstract

An exhaust dustproof check device suitable for a distribution valve of a passenger train comprises a dustproof shell, a dustproof assembly arranged in the dustproof shell and a sealing ring arranged on the outer side of the dustproof shell, the dustproof shell is connected to an F8 auxiliary valve through bolts, the F8 auxiliary valve is arranged on the distribution valve, the sealing ring is arranged between the dustproof shell and the F8 auxiliary valve, and the dustproof assembly is arranged on the outer side of the dustproof shell. The dustproof assembly comprises a dustproof net fixedly connected with the dustproof shell, a supporting column arranged below the dustproof net, and a silica gel dustproof pad arranged below the supporting column and fixedly connected with the supporting column, wherein one end of the supporting column is fixedly connected with the dustproof net, and the silica gel dustproof pad is fixedly connected with the dustproof shell. In order to solve the problem that wind and sand enter the lower portion of a valve body through an exhaust port of an auxiliary valve to cause train faults, design optimization is conducted on the exhaust port of the F8 auxiliary valve, and the emergency braking pressure limiting stability is improved, the utility model provides an exhaust dustproof check device suitable for a distribution valve of a passenger train.

Description

Technical Field

[0001] The utility model relates to the technical field of air distribution valves, in particular to an exhaust dust-proof check device suitable for distribution valves of railway passenger cars. Background Art

[0002] The F8 auxiliary valve is a component of the F8L air distribution valve. The F8 auxiliary valve adopts a two-pressure action mechanism to cooperate with the main valve, so that the F8L air distribution valve has the characteristics of stage braking, stage relief, automatic air supply, etc. of the three-pressure distribution valve, and the characteristics of easy relief of the two-pressure distribution valve. After the F8 auxiliary valve uses an aluminum alloy valve body, the exhaust port type changes. The original cast iron valve body exhaust port is provided with a spiral exhaust nozzle interface. The aluminum alloy valve body uses an exhaust mask gasket. When the train is running at high speed, the exhaust mask gasket and the valve port are not sealed tightly under the action of external high-pressure wind. Impurities such as wind and sand can easily enter the lower part of the valve body through the auxiliary valve exhaust port. The wind and sand can reach the guide rod of the vent valve by passing the exhaust mask gasket. The sand adheres to the guide rod of the vent valve, causing the guide seat to occasionally get stuck and cannot drive the sandwich valve to seal the valve port of the train pipe to the atmosphere. The pressure air of the train pipe is discharged to the atmosphere at an accelerated rate, which is easy to cause emergency failure of the train.

[0003] In order to solve the problem that wind and sand enter the lower part of the valve body through the auxiliary valve exhaust port and cause train failure, the exhaust port of the F8 auxiliary valve (aluminum alloy) is designed and optimized to improve the stability of emergency brake pressure limiting. The utility model proposes an exhaust dust prevention check device suitable for railway passenger car distribution valves. Utility Model Content

[0004] The utility model aims to overcome the problem that wind and sand enter the lower part of the valve body through the auxiliary valve exhaust port and cause train failure, and provides an exhaust dust prevention check device suitable for a railway passenger car distribution valve.

[0005] The purpose of the utility model is achieved through the following technical measures: an exhaust dust check device suitable for a railway passenger car distribution valve comprises a dustproof shell, a dustproof component arranged inside the dustproof shell, and a sealing ring arranged outside the dustproof shell, the dustproof shell is connected to the F8 auxiliary valve by bolts, the F8 auxiliary valve is arranged on the distribution valve, and the sealing ring is arranged between the dustproof shell and the F8 auxiliary valve.

[0006] The dustproof assembly includes a dustproof net fixedly connected to the dustproof shell, a support column arranged below the dustproof net and fixedly connected to the dustproof net at one end, and a silicone dustproof pad arranged below the support column and fixedly connected to the support column, wherein the silicone dustproof pad is fixedly connected to the dustproof shell.

[0007] The dustproof shell includes an upper dustproof shell and a lower dustproof shell, the upper dustproof shell is provided with a supporting structure 1, the supporting structure 1 is provided with a threaded hole 1 and is fixedly connected to the dustproof net, the threaded hole 1 is connected to the bolt, one end of the upper dustproof shell is provided with an internal thread, and the internal thread is connected to the lower dustproof shell.

[0008] The lower dustproof shell is provided with a supporting structure 2 at one end and an external thread at the other end, the external thread is connected to the upper dustproof shell through the internal thread, the supporting structure 2 is provided with a threaded hole 2 and is fixedly connected to the silicone dustproof pad, and the threaded hole 2 is connected to the bolt.

[0009] The small end of the bolt passes through the upper dustproof shell, the dustproof net, the support column, the silicone dustproof pad, and the lower dustproof shell in sequence and is threadedly connected to the F8 auxiliary valve.

[0010] The sealing ring is fixed at one end of the lower dustproof housing.

[0011] The upper dustproof shell and the lower dustproof shell are both cylindrical.

[0012] A protruding portion is provided at one end of the upper dustproof shell.

[0013] Due to the adoption of the above technical solution, compared with the prior art, the advantages of the utility model are:

[0014] (1) There is a protruding part at one end of the upper dustproof housing, which can effectively prevent sand, snow and other debris from entering the F8 auxiliary valve.

[0015] (2) A dustproof component is installed inside the dustproof housing to prevent larger debris from entering the F8 auxiliary valve, thereby improving the distribution valve's ability to resist wind and sand and reducing the failure rate of the distribution valve.

[0016] (3) One side of the silicone dustproof pad is fixedly connected to the support column, and the other side is tightly attached to the support structure 2 on the lower dustproof housing, which can effectively prevent dust, rainwater and other small debris from entering the F8 auxiliary valve. At the same time, it can prevent the silicone dustproof pad from flipping over, so that exhaust is only discharged from the inside to the outside, playing a check function. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structure planing view of the utility model.

[0018] Figure 2 It is a schematic front view of the upper dust cover of the utility model.

[0019] Figure 3 It is a three-dimensional schematic diagram of the lower dust cover of the utility model.

[0020] Legend: 1. Sealing ring; 2. Lower dustproof shell; 3. Upper dustproof shell; 4. Dustproof net; 5. Silicone dustproof pad; 6. Support column; 7. Bolt. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 3 An exhaust dust check device suitable for a railway passenger car distribution valve includes a dustproof housing, a dustproof component arranged inside the dustproof housing, and a sealing ring 1 arranged outside the dustproof housing. The dustproof housing is connected to the F8 auxiliary valve through bolts 7, the F8 auxiliary valve is arranged on the distribution valve, and the sealing ring 1 is arranged between the dustproof housing and the F8 auxiliary valve.

[0023] The dustproof component includes a dustproof net 4 fixedly connected to the dustproof shell, a support column 6 arranged below the dustproof net 4 and fixedly connected to the dustproof net 4 at one end, and a silicone dustproof pad 5 arranged below the support column 6 and fixedly connected to the support column 6. The silicone dustproof pad 5 is fixedly connected to the dustproof shell.

[0024] The dustproof shell includes an upper dustproof shell 3 and a lower dustproof shell 2. The upper dustproof shell 3 is provided with a supporting structure 1. The supporting structure 1 is provided with a threaded hole 1 and is fixedly connected to the dustproof net 4. The threaded hole 1 is connected to the bolt 7. One end of the upper dustproof shell 3 is provided with an internal thread, which is connected to the lower dustproof shell 2.

[0025] One end of the lower dustproof shell 2 is provided with a supporting structure 2 and the other end is provided with an external thread, the external thread is connected to the upper dustproof shell 3 through an internal thread, the supporting structure 2 is provided with a threaded hole 2 and is fixedly connected to the silicone dustproof pad 5, and the threaded hole 2 is connected to the bolt 7.

[0026] The small end of the bolt 7 passes through the upper dustproof housing 3, the dustproof net 4, the support column 6, the silicone dustproof pad 5, the lower dustproof housing 2 in sequence and is threadedly connected to the F8 auxiliary valve.

[0027] The sealing ring 1 is fixed to one end of the lower dustproof housing 2 .

[0028] The upper dustproof housing 3 and the lower dustproof housing 2 are both cylindrical.

[0029] One end of the upper dustproof housing 3 is provided with a protruding portion.

[0030] The specific working process of this utility model:

[0031] When the utility model is working, one end of the utility model with the sealing ring 1 is connected to the F8 auxiliary valve through the bolt 7, so that the F8 auxiliary valve is fixedly connected to the utility model. Under the action of the sealing ring 1, the F8 auxiliary valve is isolated from the external air to ensure the air tightness of the train when exhaust is not required and impurities cannot enter the distribution valve through the connection between the utility model and the F8 auxiliary valve.

[0032] When exhaust is required during train operation, the internal pressure of the F8 auxiliary valve is high, the silicone dustproof pad 5 is forced to bend outward, and the air in the car is discharged from the gap between the dustproof shell and the silicone dustproof pad 5. The dustproof net 4 maintains its shape unchanged under the action of the supporting structure 1.

[0033] After the exhaust is completed, the silicone dustproof pad 5 recovers due to its own elasticity and the support column 6, and the auxiliary valve is isolated from the outside air again.

[0034] When the silicone dustproof pad 5 and the dustproof net 4 encounter an inward bending force, the dustproof net 4 maintains its shape under the joint action of the support column 6, the upper dustproof shell 3 and the lower dustproof shell 2, and the supporting structure 2 on the lower dustproof shell 2 will support the silicone dustproof pad 5 to keep it unchanged, so that external air cannot enter the F8 auxiliary valve through the utility model, thereby isolating the air inside and outside the vehicle and playing a role of preventing backflow.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An exhaust dust prevention check device suitable for a railway passenger car distribution valve, characterized in that: The invention comprises a dustproof housing, a dustproof component arranged inside the dustproof housing, and a sealing ring (1) arranged outside the dustproof housing, wherein the dustproof housing is connected to an F8 auxiliary valve via bolts (7), the F8 auxiliary valve is arranged on the distribution valve, and the sealing ring (1) is arranged between the dustproof housing and the F8 auxiliary valve.

2. The exhaust dust prevention check device suitable for railway passenger car distribution valve according to claim 1, characterized in that: The dustproof component comprises a dustproof net (4) fixedly connected to the dustproof shell, a support column (6) arranged below the dustproof net (4) and fixedly connected to the dustproof net (4) at one end, and a silicone dustproof pad (5) arranged below the support column (6) and fixedly connected to the support column (6), wherein the silicone dustproof pad (5) is fixedly connected to the dustproof shell.

3. The exhaust dust prevention check device suitable for railway passenger car distribution valve according to claim 2, characterized in that: The dustproof shell comprises an upper dustproof shell (3) and a lower dustproof shell (2), the upper dustproof shell (3) is provided with a supporting structure one, the supporting structure one is provided with a threaded hole one and is fixedly connected to the dustproof net (4), the threaded hole one is connected to the bolt (7), one end of the upper dustproof shell (3) is provided with an internal thread, and the internal thread is connected to the lower dustproof shell (2).

4. The exhaust dust prevention check device suitable for railway passenger car distribution valve according to claim 3, characterized in that: The lower dustproof shell (2) is provided with a second supporting structure at one end and an external thread at the other end, the external thread is connected to the upper dustproof shell (3) via the internal thread, the second supporting structure is provided with a second threaded hole and is fixedly connected to the silicone dustproof pad (5), and the second threaded hole is connected to the bolt (7).

5. The exhaust dust prevention check device suitable for railway passenger car distribution valve according to claim 4, characterized in that: The small end of the bolt (7) passes through the upper dustproof housing (3), the dustproof net (4), the support column (6), the silicone dustproof pad (5), and the lower dustproof housing (2) in sequence and is threadedly connected to the F8 auxiliary valve.

6. The exhaust dust prevention check device suitable for railway passenger car distribution valve according to claim 5, characterized in that: The sealing ring (1) is fixed to one end of the lower dustproof housing (2).

7. The exhaust dust prevention check device suitable for railway passenger car distribution valve according to claim 3, characterized in that: The upper dustproof housing (3) and the lower dustproof housing (2) are both cylindrical.

8. The exhaust dust prevention check device suitable for railway passenger car distribution valve according to claim 3, characterized in that: A protruding portion is provided at one end of the upper dustproof shell (3).

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