Dust filter and air control valve with same

Abstract

The utility model provides a dust filter and an air control valve with the dust filter, and the dust filter comprises an end cover which is provided with an air inlet hole arranged in a penetrating manner; the dust filtering body is arranged on the air outlet side of the end cover, the extending direction of the dust filtering body is the same as that of the air inlet hole, the dust filtering body comprises a supporting cylinder and filtering paper arranged on the supporting cylinder, the supporting cylinder is connected with the end cover, the air inlet end of the supporting cylinder is of an opening structure, and the end, away from the air inlet end, of the supporting cylinder is of a closed structure; the supporting cylinder is provided with a plurality of air holes, and the filter paper shields the air holes. According to the technical scheme provided by the invention, the problem that the filtering effect of a dust filtering cup and a dust filtering net in the prior art is relatively limited can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering devices, in particular to a dust filter and an air control valve having the same. Background Art

[0002] The freight car brake system is one of the important components of railway freight cars. It is the actuator for the locomotive vehicle to implement deceleration and parking, and is an important guarantee for ensuring the safety of train driving. The brake control valve plays a core role in it. The railway freight car brake system adopts an air brake system, which controls the action of the brake control valve by controlling the compressed air to form different pressure differences in the brake control valve to achieve the braking and relief of the railway freight car.

[0003] In the related art, the air control valve is composed of a main valve, an emergency valve and an intermediate. A dust filter cup is installed between the intermediate and the main valve. When the train is relieved or braked, the air entering the main valve from the train pipe is filtered through the dust filter cup. The dust filter cup is an air dust filter element sintered from bronze powder metallurgy filter material. A dust filter net is installed between the intermediate and the emergency valve. When the train is relieved or emergency braked, it is used to filter the pressurized air entering the emergency valve from the train pipe.

[0004] However, in order to ensure the air intake requirement, the filtering effect of the dust filter cup and the dust filter net is relatively limited, so that some dust and impurities in the pressurized air in the train pipe can easily pass through the dust filter cup and the dust filter net and enter the braking system. Utility Model Content

[0005] The utility model provides a dust filter and an air control valve having the same, so as to solve the problem that the filtering effect of the dust filter cup and the dust filter net in the related technology is relatively limited.

[0006] According to one aspect of the utility model, a dust filter is provided, comprising: an end cover with an air inlet hole arranged therethrough; a dust filter body arranged on the air outlet side of the end cover, the extension direction of the dust filter body being the same as the extension direction of the air inlet hole, the dust filter body comprising a support tube and filter paper arranged on the support tube, the support tube being connected to the end cover, the air inlet end of the support tube being an open structure, the end of the support tube away from the air inlet end being a closed structure, the support tube having a plurality of air holes, and the filter paper covering the plurality of air holes.

[0007] Furthermore, the support cylinder includes an inner support net and an outer support net of a cylindrical structure, both of which are provided with air holes, the filter paper is arranged between the inner support net and the outer support net, and the first end of the inner support net and the first end of the outer support net are both connected to the end cover.

[0008] Furthermore, the support tube also includes a support plate, which is located at one end of the inner support net and the outer support net away from the end cover, and the second end of the inner support net and the second end of the outer support net are both connected to the support plate.

[0009] Furthermore, a groove is provided on one side of the support plate facing the inner support net and the outer support net, and the second end of the inner support net and the second end of the outer support net are both inserted into the groove.

[0010] Furthermore, the end cover and the support plate are both made of sintered metal.

[0011] Furthermore, an annular groove is provided on the air outlet side of the end cover, and the first end of the inner supporting net and the first end of the outer supporting net are both inserted into the annular groove.

[0012] Furthermore, the filter paper is made of fiber filter paper; and / or the filter paper comprises a plurality of folded sections connected in sequence, the plurality of folded sections together form a cylindrical structure, and an angle is formed between two adjacent folded sections.

[0013] Furthermore, a handle is provided on the hole wall of the air inlet hole, and the surface of the handle does not protrude from the end cover.

[0014] Furthermore, a sealing ring is sleeved on the outer wall of the end cover and fits the valve body.

[0015] According to another aspect of the utility model, an air control valve is provided. The air control valve includes a dust filter. The dust filter is the dust filter provided above.

[0016] The technical solution of the utility model is applied, and the dust filter includes an end cover and a dust filter body. By arranging the dust filter between the intermediate body and the emergency valve, or arranging the dust filter between the intermediate body and the main valve, the pressurized air can enter the dust filter body through the air inlet hole on the end cover, and the filter paper of the dust filter body can filter the pressurized air, so that the air entering the main valve or the emergency valve meets the cleanliness requirements. Compared with the filtering method using a dust filter cup or a dust filter net, the air filtering accuracy is improved while meeting the intake volume requirements, so that the dust and dirt impurities in the air in the train pipe are not easy to enter the brake system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary 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:

[0018] Figure 1 A cross-sectional view of a dust filter provided according to an embodiment of the utility model is shown;

[0019] Figure 2 Another cross-sectional view of the dust filter provided according to an embodiment of the utility model is shown;

[0020] Figure 3 A side view of a dust filter provided according to an embodiment of the utility model is shown.

[0021] The above drawings include the following reference numerals:

[0022] 10. End cover; 11. Air inlet; 12. Handle; 13. Sealing ring;

[0023] 20. Dust filter body; 21. Support cylinder; 211. Inner support net; 212. Outer support net; 22. Filter paper; 221. Folding section; 23. Support plate. DETAILED DESCRIPTION

[0024] 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. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] like Figures 1 to 3 As shown, an embodiment of the utility model provides a dust filter, which includes an end cover 10 and a dust filter body 20, the end cover 10 has an air inlet hole 11 arranged therethrough; the dust filter body 20 is arranged on the air outlet side of the end cover 10, and the extension direction of the dust filter body 20 is the same as the extension direction of the air inlet hole 11, the dust filter body 20 includes a support tube 21 and a filter paper 22 arranged on the support tube 21, the support tube 21 is connected to the end cover 10, the air inlet end of the support tube 21 is an open structure, and the end of the support tube 21 away from the air inlet end is a closed structure, the support tube 21 has a plurality of air holes, and the filter paper 22 blocks the plurality of air holes.

[0026] According to the technical solution of the utility model, the dust filter includes an end cover 10 and a dust filter body 20. By setting the dust filter between the intermediate body and the emergency valve, or between the intermediate body and the main valve, the compressed air can enter the dust filter body 20 through the air inlet 11 on the end cover 10, and the compressed air can be filtered by the filter paper 22 of the dust filter body 20, so that the air entering the main valve or the emergency valve meets the cleanliness requirements. Compared with the filtering method using a dust filter cup or a dust filter net, the air filtering accuracy is improved while meeting the intake volume requirements, so that the dust and dirt impurities in the air in the train pipe are not easy to enter the brake system.

[0027] In this embodiment, the filter paper 22 is made of high-precision fiber filter paper, and its filtering accuracy is between 1 μm and 100 μm. Among them, the existing dust filter cup uses sintered metal, and its filtering accuracy is about 200 μm. The dust filter net is a coarse filter, and its filtering accuracy is between 20 mesh and 30 mesh.

[0028] The support tube 21 can be used to support and position the filter paper 22, thereby preventing the filter paper 22 from moving and deforming under the impact of the pressurized air and improving the strength of the filter element.

[0029] Specifically, after the dust filter is installed, the surface of its end cover is flush with the surface of the valve body mounting seat, which can effectively filter the pressurized air entering the main valve and emergency valve from the train pipe, so that the cleanliness of the pressurized air meets the use requirements of the main valve and emergency valve.

[0030] The support tube 21 may adopt a mesh structure or other structures.

[0031] like Figure 1 and Figure 2 As shown, the support cylinder 21 includes an inner support net 211 and an outer support net 212 of a cylindrical structure, both of which are provided with air holes, and the filter paper 22 is arranged between the inner support net 211 and the outer support net 212, and the first end of the inner support net 211 and the first end of the outer support net 212 are both connected to the end cap 10. The support cylinder 21 with the above structure can support the inner side and the outer side of the filter paper 22 respectively through the inner support net 211 and the outer support net 212, and at the same time, the mesh structure is used to realize the circulation of air, thereby avoiding insufficient air circulation.

[0032] In this embodiment, the inner support mesh 211 and the outer support mesh 212 are woven from stainless steel wires of a certain mesh number into a stainless steel woven mesh with mesh holes of a certain size, and are connected to the end cover 10 by gluing.

[0033] like Figure 1 As shown, the support cylinder 21 further includes a support plate 23, which is located at one end of the inner support net 211 and the outer support net 212 away from the end cover 10, and the second end of the inner support net 211 and the second end of the outer support net 212 are both connected to the support plate 23. The support plate 23 can be used to strengthen the support strength of the inner support net 211 and the outer support net 212, thereby further enhancing the strength of the filter element.

[0034] like Figure 1As shown, the support plate 23 has a groove on one side facing the inner support net 211 and the outer support net 212, and the second end of the inner support net 211 and the second end of the outer support net 212 are both inserted into the groove. With the above structure, the contact area between the support plate 23 and the inner support net 211 and the outer support net 212 can be increased by utilizing the groove, and the connection strength between the inner support net 211 and the outer support net 212 can be further enhanced.

[0035] In this embodiment, the end cap 10 and the support plate 23 are both made of sintered metal. The use of the above material allows the end cap 10 and the support plate 23 to connect and support the inner support net 211 and the outer support net 212, and to filter the pressurized air and allow the pressurized air to pass through, so as to meet the air flow requirement.

[0036] like Figure 1 As shown, an annular groove is provided on the outlet side of the end cover 10, and the first end of the inner support net 211 and the first end of the outer support net 212 are both inserted into the annular groove. With the above structure, the annular groove can be used to increase the contact area between the support plate 23 and the inner support net 211 and the outer support net 212, and further enhance the connection strength between the inner support net 211 and the outer support net 212.

[0037] like Figure 1 As shown, the filter paper 22 includes a plurality of folded sections 221 connected in sequence, and the plurality of folded sections 221 together form a cylindrical structure, and an angle is formed between two adjacent folded sections 221. The filter paper 22 with the above structure can fully increase the filtering area, enhance the structural strength of the filter paper 22, and improve the service life of the new dust filter component. At the same time, the high-precision filter paper also has a good filtering effect on water vapor.

[0038] like Figure 3 As shown, a handle 12 is provided on the hole wall of the air inlet 11, and the surface of the handle 12 does not protrude from the end cover 10. Since the dust filter is located in the valve body, the handle 12 can be used to easily remove it.

[0039] In this embodiment, there are two handles 12, and the two handles 12 are arranged correspondingly. The handles 12 are semi-annular structures.

[0040] like Figure 1 As shown, a sealing ring 13 that fits the valve body is sleeved on the outer wall of the end cover 10. The sealing ring 13 can enhance the sealing performance between the dust filter and the valve body, so that the air entering the valve body can be filtered through the dust filter to meet the requirements.

[0041] Another embodiment of the utility model provides an air control valve, the air control valve includes a main valve, an emergency valve, an intermediate body and a dust filter, the air inlet of the intermediate body is connected to the train pipe, the first air outlet of the intermediate body is connected to the main valve, the second air outlet of the intermediate body is connected to the emergency valve, and dust filters are arranged between the intermediate body and the dust filter, and between the intermediate body and the emergency valve, and the dust filter is the dust filter provided above. With the above-mentioned air control valve, by arranging the dust filter between the intermediate body and the emergency valve, or arranging the dust filter between the intermediate body and the main valve, the pressurized air can enter the dust filter body 20 through the air inlet hole 11 on the end cover 10, and the pressurized air can be filtered by the filter paper 22 of the dust filter body 20, so that the air entering the main valve or the emergency valve meets the cleanliness requirements. Compared with the filtering method using a dust filter cup or a dust filter net, the filtering accuracy of the air is improved while meeting the requirements of the air intake, so that the dust and dirt impurities in the air in the train pipe are not easy to enter the braking system.

[0042] The dust filter provided by the utility model has the following beneficial effects:

[0043] 1. The dust filter has a handle 12 for easy replacement;

[0044] 2. The end cover 10 and the support plate 23 of the dust filter are made of materials that can filter pressurized air, which increases the flow of pressurized air into the valve body and makes the action response of the railway freight car control valve more sensitive and reliable.

[0045] 3. It has higher filtering accuracy and is better adapted to maintain the cleanliness inside the valve body;

[0046] 4. Solve the problem that the existing copper-based powder metallurgy dust filter cup and dust filter net have limited water vapor filtering effect.

[0047] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0048] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0049] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0050] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0051] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0052] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A dust filter, characterized in that: The dust filter comprises: The end cover (10) has an air inlet hole (11) extending therethrough; A dust filter body (20) is arranged on the air outlet side of the end cover (10); the extension direction of the dust filter body (20) is the same as the extension direction of the air inlet (11); the dust filter body (20) comprises a support tube (21) and filter paper (22) arranged on the support tube (21); the support tube (21) is connected to the end cover (10); the air inlet end of the support tube (21) is an open structure; the end of the support tube (21) away from the air inlet end is a closed structure; the support tube (21) has a plurality of air holes; the filter paper (22) blocks the plurality of air holes.

2. The dust filter according to claim 1, characterized in that: The support cylinder (21) comprises an inner support net (211) and an outer support net (212) of a cylindrical structure, the inner support net (211) and the outer support net (212) are both provided with the air holes, the filter paper (22) is arranged between the inner support net (211) and the outer support net (212), and the first end of the inner support net (211) and the first end of the outer support net (212) are both connected to the end cover (10).

3. The dust filter according to claim 2, characterized in that: The support tube (21) further comprises a support plate (23), wherein the support plate (23) is located at one end of the inner support net (211) and the outer support net (212) away from the end cover (10), and the second end of the inner support net (211) and the second end of the outer support net (212) are both connected to the support plate (23).

4. The dust filter according to claim 3, characterized in that: The support plate (23) has a groove on one side facing the inner support net (211) and the outer support net (212), and the second end of the inner support net (211) and the second end of the outer support net (212) are both inserted into the groove.

5. The dust filter according to claim 3, characterized in that: The end cover (10) and the support plate (23) are both made of sintered metal.

6. The dust filter according to claim 2, characterized in that: An annular groove is provided on the air outlet side of the end cover (10), and the first end of the inner support net (211) and the first end of the outer support net (212) are both inserted into the annular groove.

7. The dust filter according to claim 1, characterized in that: The filter paper (22) is made of fiber filter paper; and / or, The filter paper (22) comprises a plurality of folded sections (221) connected in sequence, wherein the plurality of folded sections (221) together form a cylindrical structure, and an angle is formed between two adjacent folded sections (221).

8. The dust filter according to claim 1, characterized in that A handle (12) is provided on the hole wall of the air inlet hole (11), and the surface of the handle (12) does not protrude from the end cover (10).

9. The dust filter according to claim 1, characterized in that: A sealing ring (13) is sleeved on the outer wall of the end cover (10) and is fitted with the valve body.

10. An air control valve, characterized in that: The air control valve includes a dust filter, and the dust filter is the dust filter according to any one of claims 1 to 9.

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