Force release stop valve

Abstract

The utility model provides a force release stop valve, and belongs to the technical field of valves. A force release stop valve comprises a valve body, connecting blocks are fixed to the two sides of the valve body, protruding blocks are fixed to the peripheral side of the valve body, and the force release stop valve is characterized in that an outlet channel and an inlet channel are formed in the valve body and communicate with each other through a valve cavity, an auxiliary cavity is further formed in the valve body and communicates with the valve cavity, and the protruding blocks are fixed to the valve body. A valve element assembly is arranged in the valve cavity in a sliding mode. The valve element assembly comprises a valve rod, a main sealing cover is fixed to the bottom end of the valve rod, and an auxiliary sealing cover is connected to the side, away from the valve rod, of the main sealing cover through a spring. Therefore, the service life of the valve core is greatly prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of valves, and in particular relates to a force-releasing stop valve. Background Art

[0002] The globe valve, also called the stop valve, is one of the most widely used valves. It is popular because of the small friction between the sealing surfaces during opening and closing, the durability, the small opening height, the easy manufacturing and maintenance, and it is suitable not only for medium and low pressure, but also for high pressure. The closing principle of the globe valve is to rely on the valve stem pressure to make the valve disc sealing surface fit closely with the valve seat sealing surface to prevent the flow of the medium.

[0003] During daily use, the stop valve may encounter a sudden increase in pressure at the water inlet, such as water hammer. The water pressure generated in this way will directly act on the valve core, thereby greatly reducing the sealing performance of the valve core and further reducing the service life of the valve core. Utility Model Content

[0004] The utility model aims at solving the deficiencies of the prior art and provides a force-relieving stop valve.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a force-relieving stop valve, comprising a valve body, connecting blocks are fixed on both sides of the valve body, and a convex block is fixed on the outer peripheral side of the valve body, characterized in that: an outlet channel and an inlet channel are opened in the valve body, the outlet channel and the inlet channel are connected through a valve cavity, an auxiliary cavity is also opened in the valve body, the auxiliary cavity is connected with the valve cavity, and a valve core assembly is slidably arranged in the valve cavity;

[0006] The valve core assembly comprises a valve stem, a main sealing cover is fixed to the bottom end of the valve stem, and a side of the main sealing cover away from the valve stem is connected to a secondary sealing cover via a spring.

[0007] Optionally, an external thread is provided on the outer peripheral side of the valve stem away from the main sealing cover, and the main sealing cover is divided into a large disc and a small disc, wherein the diameter of the large disc is larger than the diameter of the valve cavity, and the diameter of the small disc is smaller than the diameter of the valve cavity.

[0008] Optionally, a fixing bracket is fixed to an end face of the protruding block away from the valve body, and a swivel is rotatably connected to an end face of the fixing bracket away from the protruding block. The valve stem passes through the protruding block and the fixing bracket and is threadedly connected to the swivel.

[0009] Optionally, the outlet channel, the valve chamber and the inlet channel are distributed in a Z shape.

[0010] Optionally, there are two communicating holes between the auxiliary cavity and the valve cavity, one of which is located between the secondary sealing cover and the main sealing cover, and the other is located on a side of the secondary sealing cover away from the main sealing cover.

[0011] Optionally, the radius of the auxiliary cavity gradually increases from top to bottom along the axial direction of the valve stem, and the auxiliary cavity is arranged in a stepped shape.

[0012] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. Due to the setting of the valve core assembly, the sudden water pressure can be greatly reduced through the unloading force of the spring in the valve cavity and the trapezoidal structure of the auxiliary cavity to protect the valve core and other components, thereby greatly extending the service life of the valve core.

[0014] 2. Through the setting of the auxiliary chamber, on the one hand, the pressure can be dispersed when the water pressure suddenly increases, and at the same time, the pressure in the auxiliary chamber can be gradually eliminated through the stepped auxiliary chamber, which greatly reduces the water pressure acting on the main sealing cover. On the other hand, in the normal state without sudden pressure increase, the two sides of the secondary sealing cover are connected through the auxiliary chamber, so as to avoid the water pressure after closing the valve making the spring always in a compressed state, thereby causing its elastic performance to lose rapidly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model.

[0016] Figure 2 It is the front view of the utility model.

[0017] Figure 3 For this utility model Figure 2 Cross-sectional view along the AA direction.

[0018] 10. Valve body; 11. Connecting block; 12. Raised block; 13. Fixed bracket; 14. Swivel; 15. Valve stem; 16. Main sealing cover; 17. Secondary sealing cover; 18. Outlet; 19. Inlet; 20. Valve chamber; 21. Auxiliary chamber. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention.

[0020] As shown in Figures 1-3, a force relief stop valve includes a valve body 10, connecting blocks 11 are fixed on both sides of the valve body 10, a protruding block 12 is fixed on the outer peripheral side of the valve body 10, a fixing bracket 13 is fixed to the end face of the protruding block 12 away from the valve body 10, and a swivel 14 is rotatably connected to the end face of the fixing bracket 13 away from the protruding block 12, an outlet channel 18 and an inlet channel 19 are opened in the valve body 10, the outlet channel 18 and the inlet channel 19 are connected through a valve cavity 20, and the outlet channel 18, the valve cavity 20 and the inlet channel 19 are distributed in a Z shape, and an auxiliary cavity 21 is also opened in the valve body 10, the auxiliary cavity 21 is connected to the valve cavity 20, and a valve core assembly is slidably arranged in the valve cavity 20;

[0021] The valve core assembly includes a valve stem 15, which passes through the raised block 12 and the fixed bracket 13, and is threadedly connected to the swivel 14. A main sealing cover 16 is fixed to the bottom end of the valve stem 15, and an external thread is provided on the outer peripheral side of the valve stem 15 away from the main sealing cover 16. The main sealing cover 16 is divided into a large disc and a small disc, wherein the diameter of the large disc is larger than the diameter of the valve cavity 20, and the diameter of the small disc is smaller than the diameter of the valve cavity 20. The side of the main sealing cover 16 away from the valve stem 15 is connected to a secondary sealing cover 17 through a spring, wherein the secondary sealing cover 17 is not completely sealed, and the entire valve can be opened when the main sealing cover 16 is opened.

[0022] There are two communicating holes between the auxiliary chamber 21 and the valve chamber 20, one of which is located between the auxiliary sealing cover 17 and the main sealing cover 16, and the other is located on the side of the auxiliary sealing cover 17 away from the main sealing cover 16. The radius of the auxiliary chamber 21 gradually increases from top to bottom along the axial direction of the valve stem 15, and the auxiliary chamber 21 is arranged in a stepped manner. Through the arrangement of the auxiliary chamber 21, on the one hand, the pressure can be dispersed when the water pressure suddenly increases, and at the same time, the pressure in the auxiliary chamber 21 can be gradually eliminated through the stepped auxiliary chamber 21, greatly reducing the pressure acting on the main sealing cover 16. On the other hand, in a normal state without sudden pressure increase, the two sides of the auxiliary sealing cover 17 are connected through the auxiliary chamber 21, so as to avoid the water pressure after closing the valve causing the spring to be always in a compressed state, thereby causing its elastic performance to be lost rapidly.

[0023] When in use, water flows in from the inlet channel 19, passes through the valve cavity 20 and flows out through the outlet channel 18. When opening the valve, it is necessary to rotate the swivel 14 so that the valve stem 15 drives the main sealing cover 16 to move toward the valve stem 15 to open the valve, and vice versa to close the valve. When the pressure of the incoming water flow increases instantaneously, the water pressure is transmitted to the valve cavity 20 and the auxiliary cavity 21 through the water flow, wherein the water pressure transmitted to the auxiliary cavity 21 is greatly reduced by its trapezoidal structure, and the water pressure transmitted to the valve cavity 20 acts on the auxiliary sealing cover 17, causing the auxiliary sealing cover 17 to squeeze the spring, and the water pressure is also greatly reduced by the unloading force of the spring. Therefore, the valve core and other components can be protected by reducing the sudden water pressure, thereby greatly extending the service life of the valve core.

[0024] Obviously, the described embodiments are only a part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. A force-release stop valve, comprising a valve body (10), connecting blocks (11) being fixed on both sides of the valve body (10), and a protruding block (12) being fixed on the outer peripheral side of the valve body (10), characterized in that: An outlet passage (18) and an inlet passage (19) are provided in the valve body (10), the outlet passage (18) and the inlet passage (19) are communicated with each other through a valve cavity (20), an auxiliary cavity (21) is further provided in the valve body (10), the auxiliary cavity (21) is communicated with the valve cavity (20), and a valve core assembly is slidably provided in the valve cavity (20); The valve core assembly comprises a valve stem (15), a main sealing cover (16) is fixed to the bottom end of the valve stem (15), and a side of the main sealing cover (16) away from the valve stem (15) is connected to a secondary sealing cover (17) via a spring.

2. A pressure relief stop valve according to claim 1, characterized in that: The valve stem (15) is provided with an external thread on the outer peripheral side away from the main sealing cover (16), and the main sealing cover (16) is divided into a large disc and a small disc, wherein the diameter of the large disc is larger than the diameter of the valve cavity (20), and the diameter of the small disc is smaller than the diameter of the valve cavity (20).

3. A pressure relief stop valve according to claim 1, characterized in that: A fixing bracket (13) is fixed to the end face of one side of the protruding block (12) away from the valve body (10); a swivel (14) is rotatably connected to the end face of one side of the fixing bracket (13) away from the protruding block (12); and the valve stem (15) passes through the protruding block (12) and the fixing bracket (13) and is threadedly connected to the swivel (14).

4. A pressure relief stop valve according to claim 1, characterized in that: The outlet channel (18), the valve chamber (20) and the inlet channel (19) are distributed in a Z shape.

5. The force relief stop valve according to claim 1, characterized in that: There are two communicating holes between the auxiliary chamber (21) and the valve chamber (20), one of which is located between the secondary sealing cover (17) and the primary sealing cover (16), and the other is located on a side of the secondary sealing cover (17) away from the primary sealing cover (16).

6. A force relief stop valve according to claim 5, characterized in that: The radius of the auxiliary cavity (21) increases gradually from top to bottom along the axial direction of the valve stem (15), and the auxiliary cavity (21) is arranged in a stepped shape.

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