Straight-flow type stop valve

Abstract

The utility model discloses a straight-flow stop valve, and relates to the technical field of valves. The straight-flow type stop valve comprises a valve body and an internal assembly, the internal assembly is located on the inner side of the valve body, a valve seat is arranged on the inner side of the valve body, a guide rod is connected to the top of the valve seat, the internal assembly comprises a gland, a valve rod and a valve clack, the valve clack is connected to the outer side of a circular plate in a sleeving mode, and a clamping opening is formed in the outer side of the valve clack. And the bayonets are uniformly distributed on the outer side of the valve clack in a circular arc shape. According to the straight-flow type stop valve, the bayonet is formed in the valve clack, the guide rod is arranged on the valve seat, and the guide rod connected with the top of the valve seat is matched with the bayonet in the outer side of the valve clack, so that the valve clack is more stable in the moving process, rotation of the valve clack is limited, excessive friction between the sealing face of the valve clack and the valve seat is prevented, and the service life of the valve clack is prolonged. The service life of the valve clack is prolonged, and the possibility of medium leakage is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically a direct current shut-off valve. Background Technology

[0002] In various fluid transport systems, shut-off valves are key control components, mainly used to cut off or connect the medium in the pipeline.

[0003] In existing technologies, the valve stem and valve disc of a gate valve are typically connected by a rotary joint. While this connection method ensures normal valve operation initially, numerous drawbacks gradually emerge with prolonged use. Due to impurities in the fluid, these impurities accumulate at the rotary joint between the valve stem and valve disc during long-term transport. Combined with environmental factors, this joint is highly susceptible to corrosion. These factors work together to obstruct the rotary joint, preventing smooth relative movement between the valve disc's sealing surface and the valve seat during opening and closing, resulting in excessive friction. Excessive friction not only accelerates wear on the valve disc's sealing surface, severely impacting its lifespan, but also significantly reduces the valve's sealing performance, ultimately leading to media leakage and posing a significant threat to the safe and stable operation of the fluid transport system.

[0004] The valve stem and valve disc are connected by a rotating joint. During long-term use, impurities in the fluid will accumulate at the joint, and the joint is also prone to corrosion. This can obstruct the rotating joint and cause excessive friction between the valve disc sealing surface and the valve seat. Excessive friction accelerates the wear of the valve disc sealing surface and seriously affects the service life of the valve disc. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a DC shut-off valve, which solves the problem that when the valve stem and valve disc are connected by a rotary joint, impurities in the fluid will accumulate at the connection point during long-term use, and the connection point is also prone to corrosion. This leads to obstruction of the rotary connection, causing excessive friction between the sealing surface of the valve disc and the valve seat. Excessive friction accelerates the wear of the valve disc sealing surface and seriously affects the service life of the valve disc.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a direct-flow shut-off valve, comprising a valve body and internal components, wherein the internal components are located inside the valve body, a valve seat is provided inside the valve body, and a guide rod is connected to the top of the valve seat; the internal components include:

[0007] Capping;

[0008] Valve stem;

[0009] A valve disc is sleeved on the outside of a circular plate. A latch is provided on the outside of the valve disc, and the latch is evenly distributed in an arc shape on the outside of the valve disc.

[0010] Preferably, a valve seat is provided on the inner side of the valve body, and a groove is provided on the valve seat, with a sealing ring engaged inside the groove.

[0011] Preferably, the other end of the guide rod is connected to the inner wall of the valve body, and the guide rod is snapped into the inside of the bayonet.

[0012] Preferably, an external sealing packing is inserted into the inner side of the valve body, and the external sealing packing is sleeved on the outside of the gland.

[0013] Preferably, the gland is inserted into the inside of the valve body and has an inner sealing packing and a sealing cap inserted therein, with the sealing cap located above the inner sealing packing.

[0014] Preferably, the valve stem is inserted into the inner sealing packing and the sealing cover, and a valve handle is connected to the top of the valve stem.

[0015] This utility model discloses a DC shut-off valve. Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention features a slot on the valve disc and a guide rod on the valve seat. The guide rod connected to the top of the valve seat engages with the slot on the outside of the valve disc, making the valve disc more stable during movement. This restricts the rotation of the valve disc, prevents excessive friction between the sealing surface of the valve disc and the valve seat, extends the service life of the valve disc, and effectively reduces the possibility of media leakage. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the valve body of this utility model;

[0019] Figure 3 This is a schematic diagram of the valve seat of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal components of this utility model;

[0021] Figure 5 This is a schematic diagram of the valve disc of this utility model.

[0022] In the diagram: 1. Valve body; 11. Valve seat; 111. Slot; 112. Sealing ring; 12. Guide rod; 13. External sealing packing; 2. Internal components; 21. Gland; 211. Internal sealing packing; 212. Sealing cover; 22. Valve stem; 221. Valve handle; 222. Circular plate; 23. Valve disc; 231. Bayonet. Detailed Implementation

[0023] 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.

[0024] This application provides a DC-type shut-off valve, which solves the problem that when the valve stem and valve disc are connected by a rotary joint, impurities in the fluid will accumulate at the connection point during long-term use, and the connection point is prone to corrosion, causing the rotary connection to be obstructed. This results in excessive friction between the valve disc sealing surface and the valve seat, which accelerates the wear of the valve disc sealing surface and seriously affects the service life of the valve disc. The solution reduces the friction between the valve disc sealing surface and the valve seat, thus extending the service life of the shut-off valve.

[0025] This utility model discloses a DC shut-off valve.

[0026] Example 1

[0027] According to the appendix Figure 1-5 As shown, the valve includes a valve body 1 and an internal component 2. The internal component 2 is located inside the valve body 1. A valve seat 11 is provided inside the valve body 1, and a guide rod 12 is connected to the top of the valve seat 11. The guide rod 12 cooperates with the bayonet 231 on the valve disc 23. When the valve rod 22 drives the valve disc 23 to move up and down, it plays a good guiding role, ensuring the stability of the movement of the valve disc 23, thereby improving the accuracy of valve opening and closing. The internal component 2 includes:

[0028] Cap 21;

[0029] Valve stem 22;

[0030] Valve disc 23 is sleeved on the outside of circular plate 222. A bayonet 231 is provided on the outside of valve disc 23, and the bayonet 231 is evenly distributed in an arc shape on the outside of valve disc 23.

[0031] This invention features a slot 231 on the valve disc 23 and a guide rod 12 on the valve seat 11. The guide rod 12 connected to the top of the valve seat 11 engages with the slot 231 on the outside of the valve disc 23, making the valve disc 23 more stable during movement. This restricts the rotation of the valve disc 23, prevents excessive friction between the sealing surface of the valve disc 23 and the valve seat 11, extends the service life of the valve disc 23, and effectively reduces the possibility of media leakage.

[0032] Furthermore, a valve seat 11 is provided on the inner side of the valve body 1, and a groove 111 is provided on the valve seat 11. A sealing ring 112 is engaged inside the groove 111. Through the cooperation of the groove 111 and the sealing ring 112, the sealing performance between the valve seat 11 and the valve disc 23 is enhanced, effectively preventing media leakage.

[0033] Furthermore, the other end of the guide rod 12 is connected to the inner wall of the valve body 1, and the guide rod 12 is snapped into the inside of the bayonet 231.

[0034] Specifically disclosed, an external sealing packing 13 is inserted into the inner side of the valve body 1. The external sealing packing 13 is sleeved on the outer side of the gland 21. The external sealing packing 13 further enhances the sealing performance between the valve body 1 and the gland 21, preventing external impurities from entering the valve interior and avoiding leakage of the medium from the connection between the valve body 1 and the gland 21.

[0035] Specifically disclosed, the gland 21 is inserted into the inner side of the valve body 1, and an inner sealing packing 211 and a sealing cap 212 are inserted therein. The sealing cap 212 is located above the inner sealing packing 211. The setting of the inner sealing packing 211 and the sealing cap 212 effectively seals the gap between the valve stem 22 and the gland 21, further improving the sealing effect of the valve.

[0036] Example 2

[0037] According to the appendix Figure 1-5 As shown, the device includes a valve body 1 and an internal component 2. The internal component 2 is located inside the valve body 1. A valve seat 11 is provided inside the valve body 1, and a guide rod 12 is connected to the top of the valve seat 11. The internal component 2 includes:

[0038] Cap 21;

[0039] Valve stem 22;

[0040] Valve disc 23 is sleeved on the outside of circular plate 222. A bayonet 231 is provided on the outside of valve disc 23, and the bayonet 231 is evenly distributed in an arc shape on the outside of valve disc 23.

[0041] It should be emphasized that the valve stem 22 is inserted into the inner sealing packing 211 and the sealing cover 212. The valve stem 22 is connected to the top of the valve handle 221. The operator rotates the valve handle 221 to drive the valve stem 22 to move up and down, thereby realizing the valve disc 23 to control the opening and closing of the valve.

[0042] Working principle: This utility model has a slot 231 on the valve disc 23 and a guide rod 12 on the valve seat 11. The guide rod 12 connected to the top of the valve seat 11 cooperates with the slot 231 on the outside of the valve disc 23, making the valve disc 23 more stable during movement, thereby limiting the rotation of the valve disc 23, preventing excessive friction between the sealing surface of the valve disc 23 and the valve seat 11, extending the service life of the valve disc 23, and effectively reducing the possibility of media leakage.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A straightway globe valve comprising a valve body (1) and an inner assembly (2) which is located inside the valve body (1), characterized in that, The valve body (1) is internally provided with a valve seat (11), the top of the valve seat (11) is connected with a guide rod (12), the internal component (2) comprises: a gland (21); a valve rod (22); a valve flap (23), the valve flap (23) is sleeved outside the circular plate (222), a bayonet (231) is formed on the outside of the valve flap (23), the bayonet (231) is uniformly distributed in a circular arc shape on the outside of the valve flap (23).

2. The straight-through shut-off valve according to claim 1, characterized in that The valve body (1) is internally provided with a valve seat (11), the valve seat (11) is internally provided with a clamping groove (111), the clamping groove (111) is internally clamped with a sealing ring (112).

3. The straight-through shut-off valve according to claim 1, characterized in that The other end of the guide rod (12) is connected with the inner wall of the valve body (1), the guide rod (12) is clamped inside the bayonet (231).

4. The straight-through shut-off valve according to claim 1, characterized in that The valve body (1) is internally inserted with an outer sealing packing (13), the outer sealing packing (13) is sleeved outside the gland (21).

5. The straight-through shut-off valve according to claim 1, characterized in that The gland (21) is inserted inside the valve body (1) and is inserted with an inner sealing packing (211) and a sealing cover (212), the sealing cover (212) is located above the inner sealing packing (211).

6. The straight through shut off valve of claim 1, wherein, The valve rod (22) is inserted inside the inner sealing packing (211) and the sealing cover (212), the top of the valve rod (22) is connected with a valve handle (221).

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