Stop valve with valve rod protection structure

Abstract

The stop valve with the valve rod protection structure comprises a valve body, a limiting plate is arranged in the middle of the interior of the valve body, a through hole is formed in one side of the limiting plate, meanwhile, a sealing valve element is detachably connected to the interior of the through hole, a rubber sleeve is arranged in the middle of the upper end of the sealing valve element, and the rubber sleeve is in a funnel shape. The rubber sleeve is arranged on the outer side of the lower end of the valve rod body, the upper end of the valve rod body penetrates through a through hole formed in the upper end of the valve body and a sealing seat, the through hole and the sealing seat are located in the middle of the inner side of a limiting frame arranged at the upper end of the valve body, and a protection assembly is arranged on the outer side, located above the limiting frame, of the valve rod body. According to the stop valve with the valve rod protection structure, by arranging the rubber sleeve, the part, in the valve body, of the valve rod body is conveniently protected, meanwhile, the folding protection sleeve and the protection cover are arranged on the portion, located above the valve body, of the valve rod body, water vapor is conveniently isolated, and therefore the valve rod body is prevented from being rusted and damaged, and the damp-proof effect is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of gate valves, specifically a gate valve with a valve stem protection structure. Background Technology

[0002] A gate valve, also called a stop valve, is one of the most widely used types of valves. Its popularity stems from the low friction between the sealing surfaces during opening and closing, making it relatively durable. It also features a small opening height, ease of manufacture, and convenient maintenance. It is suitable for both low and medium pressures, as well as high pressures. The closing principle of a gate valve relies on the pressure of the valve stem to ensure a tight seal between the valve disc sealing surface and the valve seat sealing surface, thus preventing the flow of media.

[0003] A search revealed that a typical example of a gate valve in the prior art is disclosed in CN220248943U, which describes a gate valve comprising: a valve body, a valve stem, and a valve core. The valve body includes an input port and an output port, and a valve hole is formed inside the valve body. The input port and the output port are connected through the valve hole. The valve stem is threaded to the valve body. The valve core is located inside the valve body and is fixedly connected to the lower end of the valve stem. The end of the valve stem extending out of the valve body is the driving end. By rotating the driving end, the valve core can be moved up and down, thereby blocking or opening the valve hole. The valve core has a conical structure, and the valve hole is a through hole with a sealing fit on the large end surface of the conical structure. In the design scheme of this utility model, by setting the valve core into a conical structure, an adjustable annular area is formed between the conical surface of the valve core and the circular valve hole, which enables the adjustment of the linear flow rate.

[0004] In summary, the valve stem of existing gate valves is generally affected by moisture during use. When the valve stem is in a humid environment for a long time, it is prone to moisture and rust, and the moisture protection effect is not good. To address the above problems, the existing equipment needs to be improved. Utility Model Content

[0005] The purpose of this utility model is to provide a gate valve with a valve stem protection structure to solve the problem mentioned in the background art that the valve stem of the existing gate valve is generally affected by water vapor during use, and the valve stem is prone to moisture and rust when it is in a water vapor environment for a long time, resulting in poor moisture protection.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a stop valve with a valve stem protection structure, comprising a valve body,

[0007] The valve body has a limiting plate in the middle, and a through hole on one side of the limiting plate. A sealing valve core is detachably connected inside the through hole. A funnel-shaped rubber sleeve is provided at the middle of the upper end of the sealing valve core. The rubber sleeve is located on the outer side of the lower end of the valve stem body. The upper end of the valve stem body passes through a through hole and a sealing seat at the upper end of the valve body. The through hole and the sealing seat are located in the middle of the inner side of the limiting frame at the upper end of the valve body. A protective component is provided on the outer side of the valve stem body above the limiting frame. The protective component includes a positioning seat, which is located inside the limiting frame and connected to the valve body through the sealing seat by a fixing bolt. Multiple support rods are equidistantly arranged on the upper end of the positioning seat. The top of the support rods is connected to the lower end of the limiting seat sleeved on the outer side of the valve stem body. A handwheel is provided on the upper end of the valve stem body. The top of the handwheel is connected to the middle of the lower end of the protective cover by a top rod. A folding protective sleeve is provided between the protective cover and the limiting frame on the outer side of the valve stem body.

[0008] Preferably, the valve body has an inlet and an outlet at both ends, and mounting flanges are welded to the outside of both the inlet and outlet. A nameplate is also provided in the middle of the front of the valve body.

[0009] Preferably, a filter plate is provided inside the valve body on one side of the liquid inlet, and a connecting rod is snapped into the middle of the side of the filter plate away from the valve stem body. At the same time, the other end of the connecting rod is threaded into the middle of the filter frame. The filter frame is snapped into the liquid inlet, and one end of the filter frame is attached to the outer side of the corresponding mounting flange through a mounting plate.

[0010] Preferably, the lower outer end of the valve stem body is detachably connected to the lower inner end of the rubber sleeve, and the upper inner end of the rubber sleeve is slidably connected to the outer side of the valve stem body.

[0011] Preferably, the outer side of the lower end of the folding protective sleeve is threaded to the upper end of the inner part of the limiting frame, and the outer side of the upper end of the folding protective sleeve is snap-fitted to the lower end of the protective cover.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the shut-off valve with a valve stem protection structure,

[0013] (1) In order to solve the problem that the valve stem of the existing gate valve is generally affected by water vapor during use, and the valve stem is prone to moisture and rust when it is in a water vapor environment for a long time, resulting in poor moisture protection, this application sets a rubber sleeve to protect the part of the valve stem body inside the valve body. At the same time, a folding protective sleeve and a protective cover are set on the valve stem body above the valve body to isolate water vapor, thereby avoiding corrosion damage to the valve stem body and improving the moisture protection effect;

[0014] (2) In order to solve the problem that when existing shut-off valves are used, impurities in the fluid adhere to the inner surface of the valve body and cannot be cleaned due to the lack of a filter, which affects the smoothness of fluid flow, this application sets a filter plate and a filter frame inside the inlet. After the fluid passes through the filter frame, the impurities are collected inside the filter frame for later cleaning. Then, the fluid passes through the filter plate again for filtration, which improves the cleanliness of the fluid, avoids clogging inside the valve body, and improves the smoothness of fluid flow. Attached Figure Description

[0015] Figure 1 This is a frontal cross-sectional view of the present invention.

[0016] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0017] Figure 3 This utility model Figure 1 Enlarged structural diagram at point B;

[0018] Figure 4 This is a front view structural diagram of the present utility model.

[0019] In the diagram: 1. Valve body; 101. Inlet; 102. Outlet; 103. Mounting flange; 104. Limiting frame; 105. Nameplate; 2. Limiting plate; 3. Sealing valve core; 4. Rubber sleeve; 5. Valve stem body; 6. Sealing seat; 7. Positioning seat; 8. Fixing bolt; 9. Support rod; 10. Limiting seat; 11. Handwheel; 12. Top rod; 13. Protective cover; 14. Folding protective sleeve; 15. Filter plate; 16. Connecting rod; 17. Filter frame; 18. Mounting plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This utility model provides a technical solution: a shut-off valve with a valve stem protection structure, according to... Figure 1 , Figure 2 and Figure 4As shown, a limiting plate 2 is provided in the middle of the valve body 1, and a through hole is provided on one side of the limiting plate 2. A sealing valve core 3 is detachably connected inside the through hole. A rubber sleeve 4 is provided in the middle of the upper end of the sealing valve core 3. The rubber sleeve 4 is funnel-shaped and is located on the outer side of the lower end of the valve stem body 5. The outer side of the lower end of the valve stem body 5 is detachably connected to the lower end of the inner part of the rubber sleeve 4, and the upper end of the inner part of the rubber sleeve 4 is slidably connected to the outer side of the valve stem body 5. The rubber sleeve 4 facilitates the protection of the part of the valve stem body 5 located inside the valve body 1, thereby improving the service life of the valve stem body 5.

[0022] Further explanation: the valve body 1 has an inlet 101 and an outlet 102 at both ends, and mounting flanges 103 are welded to the outside of both the inlet 101 and the outlet 102. A nameplate 105 is located in the center of the front of the valve body 1. A filter plate 15 is installed inside the valve body 1 on one side of the inlet 101. The filter plate 15 facilitates secondary filtration of the fluid, preventing impurities from adhering to the inner wall of the valve body 1. A connecting rod 16 is engaged with the filter plate 15 on the side away from the valve stem body 5. The other end is threaded to the middle of the filter frame 17. The filter frame 17 facilitates the collection and cleaning of impurities in the fluid. The filter frame 17 is snap-fitted into the inlet 101. One end of the filter frame 17 is attached to the outside of the corresponding mounting flange 103 via the mounting plate 18. The mounting flange 103 and the connecting rod 16 facilitate the fixing and limiting of the position of the filter frame 17 inside the inlet 101, preventing the fluid from impacting and damaging it when it enters the valve body 1.

[0023] according to Figure 1 , Figure 3 and Figure 4As shown, the upper end of the valve stem body 5 passes through the through hole and sealing seat 6 opened at the upper end of the valve body 1. The through hole and sealing seat 6 are located in the middle of the inner side of the limiting frame 104 set at the upper end of the valve body 1. The sealing seat 6 improves the sealing between the through hole and the valve stem body 5, preventing fluid from flowing out from the gap. At the same time, a protective component is set on the outer side of the valve stem body 5 above the limiting frame 104. The protective component includes a positioning seat 7, which is located inside the limiting frame 104 and connected to the valve body 1 through the sealing seat 6 by fixing bolts 8. At the same time, multiple support rods 9 are equidistantly arranged on the upper end of the positioning seat 7. The top of the support rod 9 is connected to the lower end of the limiting seat 10 sleeved on the outer side of the valve stem body 5. The fixing bolts 8 facilitate the connection between the positioning seat 7 and the valve body 1, so that the support rods can be used to connect the valve body 1. The support rod 9 and the limiting seat 10 provide limiting protection for the outer side of the upper end of the valve stem body 5. A handwheel 11 is provided at the upper end of the valve stem body 5, and the top center of the handwheel 11 is connected to the lower center of the protective cover 13 via a top rod 12. At the same time, a folding protective sleeve 14 is provided between the protective cover 13 and the limiting frame 104 on the outer side of the valve stem body 5. The lower outer side of the folding protective sleeve 14 is threaded to the upper inner end of the limiting frame 104, and the upper outer side of the folding protective sleeve 14 is engaged with the lower end of the protective cover 13. Through the folding protective sleeve 14, both ends of the folding protective sleeve 14 are connected to the limiting frame 104 and the protective cover 13 respectively, placing the valve stem body 5 in the folding protective sleeve 14, thereby isolating water vapor and improving the protection of the valve stem body 5.

[0024] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A stop valve with valve stem protection structure, comprising a valve body (1), characterized in that: The valve body (1) is internally provided with a limiting plate (2), and a through hole is formed on one side of the limiting plate (2), and a sealing valve core (3) is detachably connected in the through hole, a rubber sleeve (4) is arranged at the upper end of the sealing valve core (3), the rubber sleeve (4) is funnel-shaped, and the rubber sleeve (4) is arranged at the lower end of the valve stem body (5) on the outer side, the valve stem body (5) penetrates the through hole and the sealing seat (6) formed on the upper end of the valve body (1), the through hole and the sealing seat (6) are located in the middle of the inner side of the limiting frame (104) arranged on the upper end of the valve body (1), and the protection assembly is arranged on the outer side above the limiting frame (104), the protection assembly comprises a positioning seat (7), the positioning seat (7) is connected with the valve body (1) through the fixing bolt (8) penetrating the sealing seat (6) in the inner side of the limiting frame (104), a plurality of support rods (9) are equidistantly arranged on the upper end of the positioning seat (7), the top of the support rod (9) is connected with the limiting seat (10) sleeved on the outer side of the valve stem body (5), a hand wheel (11) is arranged on the upper end of the valve stem body (5), the top of the hand wheel (11) is connected with the lower end of the protection cover (13) through the jacking rod (12) in the middle, and the folding protection sleeve (14) is arranged on the outer side of the valve stem body (5) between the protection cover (13) and the limiting frame (104).

2. The globe valve with stem protection according to claim 1, wherein: The valve body (1) is provided with a liquid inlet (101) and a liquid outlet (102) at both ends, and the mounting flanges (103) are welded on the outer sides of the liquid inlet (101) and the liquid outlet (102), and the nameplate (105) is arranged on the front surface of the valve body (1).

3. The globe valve with stem protection in accordance with claim 1, wherein: The filter plate (15) is arranged on the side of the valve body (1) close to the liquid inlet (101), the connecting rod (16) is clamped and connected in the middle of the side of the filter plate (15) away from the valve stem body (5), and the other end of the connecting rod (16) is threadedly connected with the filter frame (17), the filter frame (17) is clamped and connected with the inner side of the liquid inlet (101), and the outer side of the filter frame (17) is attached to the outer side of the corresponding mounting flange (103) through the mounting plate (18).

4. The globe valve with stem protection in accordance with claim 1, wherein: The lower end of the valve stem body (5) is detachably connected with the inner lower end of the rubber sleeve (4), and the upper end of the rubber sleeve (4) is slidably connected with the outer side of the valve stem body (5).

5. The globe valve with stem protection in accordance with claim 1, wherein: The lower end of the folding protection sleeve (14) is threadedly connected with the upper end of the limiting frame (104), and the upper end of the folding protection sleeve (14) is clamped and connected with the lower end of the protection cover (13).

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