Valve with dustproof structure

Abstract

This utility model discloses a valve with a dustproof structure, belonging to the field of valves. It includes a valve body, a valve cover on the valve body, and a valve stem on the valve cover. A handwheel is provided on the valve stem, and a dustproof bracket is provided on the valve cover. A dustproof cover rotatably covers the valve stem on the dustproof bracket. The dustproof cover includes a main rotating cover and a secondary rotating cover. When lubrication, inspection, or operation of the valve stem is required, simply rotating the secondary rotating cover allows it to rotate along the shaft and retract into the main rotating cover, quickly exposing the valve stem without disassembling the entire dustproof cover. This greatly simplifies the maintenance process. Compared to traditional fixed or fully removable structures, where the dustproof cover needs to be completely removed for each valve stem maintenance, making the operation cumbersome, this utility model uses a rotating opening and closing design. Only the secondary cover needs to be rotated to expose the valve stem, making the maintenance process more efficient.

Description

Technical Field

[0001] This utility model relates to the field of valves, and in particular to a valve with a dustproof structure. Background Technology

[0002] In some existing gate valves, the valve stem is located outside the valve cover. Over time, dust accumulates on the outside, making it difficult to rotate the valve stem when it is used again. Dust covers are installed on the outside of the valve stem, but the existing dust covers are all one-piece structures that are difficult to open, making it difficult to maintain the valve stem. Utility Model Content

[0003] The purpose of this invention is to provide a valve with a dustproof structure, which solves the problem of cumbersome operation caused by the need to completely remove the dust cover for each maintenance of the valve stem in traditional fixed or fully disassembled structures.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a valve with a dustproof structure, comprising a valve body, a valve cover disposed on the valve body, and a valve stem disposed on the valve cover, wherein a handwheel is provided on the valve stem, a dustproof bracket is provided on the valve cover, and a dustproof cover is rotatably disposed on the dustproof bracket to cover the valve stem.

[0005] Furthermore, the dust cover includes a main rotating cover and a secondary rotating cover, and the radius difference between the main rotating cover and the secondary rotating cover allows the secondary rotating cover to be nested inside the main rotating cover.

[0006] Furthermore, both ends of the main rotating cover and the auxiliary rotating cover are provided with rotating bearings of the same radius, the two rotating bearings are stacked concentrically, and a shaft is provided in the two rotating bearings, the shaft being fixedly connected to the dustproof bracket.

[0007] Furthermore, the main rotating cover and the secondary rotating cover rotate relative to each other, and the secondary rotating cover rotates around the shaft and is housed inside the main rotating cover. When the main rotating cover and the secondary rotating cover rotate to face each other on the opening side, the main rotating cover and the secondary rotating cover form a sealed cylinder.

[0008] Furthermore, a sealing strip is provided between the main rotating cover and the secondary rotating cover.

[0009] Furthermore, the dustproof bracket is a rectangular frame, with its bottom fixedly connected to the valve cover and its top provided with a support platform. The support platform is provided with a through hole that fits with the valve stem with clearance.

[0010] Furthermore, the rotary bearing is provided with a limiting hole, the support platform is provided with a guide hole aligned with the limiting hole, a limiting post is slidably provided in the guide hole, the limiting post passes through two stacked rotary bearings, and the main rotary cover is fixed to the auxiliary rotary cover.

[0011] Furthermore, the upper end of the limiting post is provided with a driving ring, the driving ring is provided with a driving rod extending outward to the side of the support platform, the support platform is provided with a support hole on the side of the same side as the driving rod, and the driving rod is provided with a cylindrical pin.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] In the closed state, the main rotating cover and the auxiliary rotating cover rotate coaxially to form a complete cylindrical dust cover, completely covering the exposed part of the valve stem and effectively preventing the adhesion of contaminants such as dust and moisture. A sealing strip is provided between the two covers to further enhance the sealing performance and prevent fine particles from entering. When lubrication, inspection, or operation of the valve stem is required, simply rotate the auxiliary rotating cover so that it rotates along the shaft and is stored inside the main rotating cover to quickly expose the valve stem without disassembling the entire dust cover. This greatly simplifies the maintenance process. Compared to traditional fixed or fully removable structures, which require complete removal of the dust cover for each valve stem maintenance, making the operation cumbersome, this utility model uses a rotating opening and closing design. Only the auxiliary cover needs to be rotated to expose the valve stem, making the maintenance process more efficient, especially suitable for valves that require frequent adjustment or maintenance. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of a valve with a dustproof structure according to the present invention;

[0016] Figure 2 This is a schematic diagram of the dust cover structure;

[0017] Figure 3 This is a schematic diagram of the structure of the support platform of this utility model;

[0018] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0019] Figure 5 This is a disassembled schematic diagram of the dust cover of this utility model;

[0020] Figure 6 This is a schematic diagram of the support platform of this utility model.

[0021] In the diagram: 1 Valve body, 2 Valve cover, 3 Valve stem, 4 Handwheel, 5 Dustproof bracket, 51 Support platform, 52 Guide hole, 53 Limiting post, 54 Supporting hole, 6 Dustproof cover, 61 Main rotating cover, 62 Auxiliary rotating cover, 63 Rotary bearing, 64 Shaft, 65 Sealing strip, 66 Limiting hole, 67 Drive ring, 68 Drive rod, 69 Cylindrical pin. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0023] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0024] like Figure 1 As shown, this utility model provides a valve with a dustproof structure. The valve is a gate valve. The valve body 1 of the gate valve includes a detachable valve cover 2, a dustproof bracket 5 and a rotatable dustproof cover 6 structure set above the valve cover 2. The dustproof bracket 5 is made of metal or high-strength engineering plastic and is firmly fixed to the top of the valve cover 2 by bolts or welding. The dustproof bracket 5 extends upward and supports both sides of the valve stem 3 that protrudes from the valve cover 2. A handwheel 4 is provided at the top of the valve stem 3. The handwheel 4 is located above the dustproof bracket. The dustproof cover 6 is connected to the dustproof bracket by a rotating shaft and adopts a semi-circular hollow column structure, which can completely cover the exposed part of the valve stem 3. When installing, attention should be paid to adjusting the rotation radius of the dustproof cover 6 to ensure that its opening and closing trajectory does not interfere with the handwheel 4 or other components. During operation, the worker only needs to apply force to rotate the edge of the dustproof cover 6 to open the dustproof cover 6 to expose or cover the valve stem 3. The whole process does not require tools and can be completed by a single person.

[0025] like Figure 5 As shown, the main dust cover 6 includes a main rotating cover 61 and an auxiliary rotating cover 62. The main rotating cover 61 and the auxiliary rotating cover 62 are two semi-cylinders made of arc-shaped metal plates. The difference in radius between the two is controlled within the range of -mm. This ensures that the auxiliary rotating cover 62 can slide smoothly while maintaining sufficient structural strength. During installation, it ensures that the auxiliary rotating cover 62 can move smoothly within the main rotating cover 61. The auxiliary rotating cover 62 can be rotated ° to be completely retracted into the main rotating cover 61. At this time, one side of the valve stem 3 will be fully exposed, which is convenient for lubrication or maintenance. Compared with the traditional integrated dust cover 6, this design allows maintenance work to be completed without disassembling the dust cover 6.

[0026] like Figure 2 , Figure 5 and Figure 6As shown in the figure, at both ends of the main rotating cover 61 and the auxiliary rotating cover 62, there are circular rotary bearings 63. Half of the rotary bearings 63 extend out of the main rotating cover 61 and the auxiliary rotating cover 62. At the same time, the rotary bearings 63 of the main rotating shaft and the auxiliary rotating shaft are fixed and provided with support points by the shaft 64. The shaft 64 is provided with two layers of bearing mounting grooves. The rotary bearings 63 of the main rotating cover 61 and the auxiliary rotating cover 62 are respectively installed in the mounting grooves. The upper shaft 64 is installed above the dustproof frame, and the lower shaft 64 is installed on the valve cover 2, realizing the rotational opening and closing of the main rotating cover 61 and the auxiliary rotating cover 62.

[0027] like Figure 3 and Figure 5 As shown, a sealing strip 65 is provided between the main rotating cover 61 and the secondary rotating cover 62. The sealing strip 65 is installed on the outside of the secondary rotating cover. The sealing strip 65 fills the gap between the main rotating cover 61 and the secondary rotating cover 62, further improving the dustproof effect.

[0028] like Figure 1 , Figure 2 and Figure 5 As shown, the dustproof bracket 5 is a rectangular frame, with its bottom fixedly connected to the valve cover 2. A support platform 51 is provided at the top near the valve stem 3. The support platform 51 has a mounting hole with the same center as the valve stem 3. The valve stem 3 passes through the mounting hole of the support platform 51. The support platform 51 allows the dustproof bracket 5 to be connected to the valve stem 3, thus fixing both ends of the dustproof bracket 5 and improving its stability. The support platform 51 also has a guide hole 52 and a support hole 54. The guide hole 52 extends from the upper surface to the lower surface of the support platform 51, and the support hole 54 is opened on the circumference of the support platform 51.

[0029] like Figure 4 and Figure 5As shown, the rotary bearing 63 is provided with a limiting hole 66, and the support platform 51 is provided with a guide hole 52 aligned with the limiting hole 66. A limiting post 53 is slidably disposed in the guide hole 52. The limiting post 53 passes through two stacked rotary bearings 63. The main rotating cover 61 and the auxiliary rotating cover 62 are fixed together. The upper end of the limiting post 53 is provided with a driving ring 67. The driving ring 67 is provided with a driving rod 68 extending outward to the side of the support platform 51. The support platform 51 is provided with a support hole 54 on the side of the same side as the driving rod 68. The drive rod 68 is provided with a cylindrical pin 69, and the limiting pin 53 is inserted into the guide hole 52 through the drive ring 67. The length of the limiting pin 53 should be able to extend to the bottom of the shaft 64. The limiting pin 53 can pass through the limiting holes 66 of the main rotating cover 61 and the auxiliary rotating cover 62. When the limiting pin 53 is inserted into the limiting hole 66, the main rotating cover 61 and the auxiliary rotating cover 62 can be restricted from rotating and cannot be opened. This structure improves the sealing effect. When the valve cover 2 is not under maintenance, the main rotating cover 61 and the auxiliary rotating cover 62 are firmly closed to form a sealing column, ensuring a long-term dustproof effect.

[0030] When the valve stem 3 needs to be inspected, the cylindrical pin 69 is removed from the support hole 54, and then the drive ring 67 is lifted upward by the drive rod 68, so that the limit pin 53 is disengaged from the limit hole 66. At this time, the main rotating cover 61 and the auxiliary rotating cover 62 can rotate only to the right. By simply rotating the edge of the dust cover 6, the dust cover 6 can be opened to expose or cover the valve stem 3. This utility model adopts a rotating opening and closing design, and the valve stem 3 can be exposed by simply rotating the auxiliary cover, making the maintenance process more efficient. It is especially suitable for valves that require frequent adjustment or maintenance.

[0031] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. A valve with a dustproof structure, comprising a valve body, a valve cover disposed on the valve body, and a valve stem disposed on the valve cover, wherein the valve stem is provided with a handwheel, characterized in that, The valve cover is provided with a dustproof bracket, and a dustproof cover that covers the valve stem is rotatably mounted on the dustproof bracket.

2. The valve with a dustproof structure according to claim 1, characterized in that, The dust cover includes a main rotating cover and a secondary rotating cover, and the radius difference between the main rotating cover and the secondary rotating cover allows the secondary rotating cover to be nested inside the main rotating cover.

3. The valve with a dustproof structure according to claim 2, characterized in that, Both ends of the main rotating cover and the auxiliary rotating cover are provided with rotating bearings of the same radius. The two rotating bearings are stacked concentrically. A shaft is provided in the two rotating bearings, and the shaft is fixedly connected to the dustproof bracket.

4. The valve with a dustproof structure according to claim 3, characterized in that, The main rotating cover and the auxiliary rotating cover rotate relative to each other. The auxiliary rotating cover rotates around the shaft and is housed inside the main rotating cover. When the main rotating cover and the auxiliary rotating cover rotate to face each other on the opening side, the main rotating cover and the auxiliary rotating cover form a sealed cylinder.

5. The valve with a dustproof structure according to claim 2, characterized in that, A sealing strip is provided between the main rotating cover and the secondary rotating cover.

6. The valve with a dustproof structure according to claim 2, characterized in that, The dustproof bracket is a rectangular frame, with its bottom fixedly connected to the valve cover and a support platform at the top. The shaft is located at the bottom of the support platform.

7. The valve with a dustproof structure according to claim 6, characterized in that, The rotary bearing is provided with a limiting hole, and the support platform is provided with a guide hole aligned with the limiting hole. A limiting post is slidably provided in the guide hole. The limiting post passes through two stacked rotary bearings, and the main rotary cover is fixed to the auxiliary rotary cover.

8. The valve with a dustproof structure according to claim 7, characterized in that, The upper end of the limiting post is provided with a driving ring, the driving ring is provided with a driving rod extending outward to the side of the support platform, the support platform is provided with a support hole on the side of the same side as the driving rod, and the driving rod is provided with a cylindrical pin.

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