Drain valve with soft sealing structure

Abstract

The drain valve with the soft sealing structure comprises a valve body, a valve rod is arranged at the upper end of the valve body in a penetrating mode, the valve body comprises an upper sealing cavity, a threaded cavity channel, a lower sealing cavity, a water inlet channel and a water inlet connector which are sequentially arranged from top to bottom, an arc-shaped boss is arranged on the outer side of the upper end of the water inlet channel, and a sealing gasket is arranged at the bottom of the valve rod. The utility model relates to the technical field of drain valves, in particular to a water inlet channel sealing device, which is characterized in that a sealing gasket is extruded by an arc-shaped boss to realize soft sealing of a water inlet channel, the problem of jamming is avoided, the sealing reliability is improved, and meanwhile, a knurled handle is arranged on the circumference of the top of a valve rod, so that the use hand feeling is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of drain valves, in particular to a drain valve with a soft sealing structure. Background Art

[0002] Drain valve is an indispensable product in the water industry, mainly used in urban, construction, enterprise water supply and drainage projects, industrial and domestic sewage treatment and water conservancy projects. Among them, various types of medium and low pressure valves are widely used, including various types of butterfly valves and gate valves. Others include ball valves, check valves, exhaust valves, plug valves, diaphragm valves, pressure reducing valves, flow regulating valves, mud discharge valves, etc. They are mainly used for liquid discharge or liquid level control.

[0003] At present, the industry adopts the hard sealing structure for drain valve seal. The main form is that the sealing element is in direct contact with the valve body, and the line and surface cooperate to form a sealing line by applying a certain force, so as to achieve the purpose of sealing. The advantages of this sealing method are low cost and strong versatility. The disadvantage is poor sealing stability. When the sealing torque is improperly operated or long-term opening and closing causes the sealing area to deform, the seal will fail. Utility Model Content

[0004] The purpose of the utility model is to provide a drain valve with a soft sealing structure to solve the problems raised in the above background technology.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A drain valve with a soft sealing structure comprises a valve body, a valve stem is inserted into the upper end of the valve body, the valve body comprises an upper sealing cavity, a threaded cavity, a lower sealing cavity, a water inlet channel and a water inlet interface which are arranged in sequence from top to bottom, an arc-shaped boss is provided on the outer side of the upper end of the water inlet channel, a sealing gasket is provided at the bottom of the valve stem, and the sealing of the water inlet channel is achieved by squeezing the sealing gasket through the arc-shaped boss.

[0007] Preferably, the valve stem comprises a knurled handle, a sealing ring groove, a threaded section and a sealing body which are arranged in sequence from top to bottom.

[0008] Preferably, the sealing ring slot is arranged in the upper sealing cavity, a sealing ring is arranged in the sealing ring slot, and the sealing ring is used to seal the upper sealing cavity.

[0009] Preferably, the threaded section is screwed into the threaded cavity.

[0010] Preferably, the sealing body is arranged in the lower sealing cavity, and the sealing gasket is arranged at the bottom of the sealing body.

[0011] Preferably, a water outlet interface is also provided on the side of the lower sealed cavity.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0013] In the utility model, the sealing gasket is squeezed by the arc-shaped boss to achieve soft sealing of the water inlet channel, avoid the problem of sticking and improve the reliability of the seal. At the same time, a knurled handle is provided on the circumference of the top of the valve stem to improve the feel of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an exploded view of the utility model;

[0015] Figure 2 It is a cross-sectional view of the utility model;

[0016] Figure 3 It is an enlarged view of the structure at A of the utility model;

[0017] Figure 4 It is a schematic diagram of the existing sealing structure of the utility model;

[0018] In the figure: 1. valve body; 11. upper sealing chamber; 12. threaded chamber; 13. lower sealing chamber; 14. water inlet channel; 15. water inlet interface; 16. arc boss; 2. valve stem; 21. knurled handle; 22. sealing ring groove; 23. threaded section; 24. sealing body; 3. sealing ring; 4. sealing gasket; 5. water outlet interface. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0020] Example:

[0021] A drain valve with a soft sealing structure, such as Figure 1-3 As shown, it includes a valve body 1, a valve stem 2 is inserted into the upper end of the valve body 1, the valve body 1 includes an upper sealing cavity 11, a threaded cavity 12, a lower sealing cavity 13, a water inlet channel 14 and a water inlet interface 15 arranged in sequence from top to bottom, an arc-shaped boss 16 is provided on the outer side of the upper end of the water inlet channel 14, a sealing gasket 4 is provided at the bottom of the valve stem 2, and the sealing gasket 4 is squeezed by the arc-shaped boss 16 to achieve the sealing of the water inlet channel 14.

[0022] In a possible implementation, the valve stem 2 includes a knurled handle 21 , a sealing ring groove 22 , a threaded section 23 and a sealing body 24 which are sequentially arranged from top to bottom.

[0023] In a possible implementation manner, the sealing ring groove 22 is provided in the upper sealing cavity 11 , and the sealing ring 3 is clamped in the sealing ring groove 22 , so that the upper sealing cavity 11 is sealed by the sealing ring 3 .

[0024] In a possible implementation manner, the threaded segment 23 is screwed into the threaded cavity 12 .

[0025] In a possible implementation manner, the sealing body 24 is disposed in the lower sealing cavity 13 , and the sealing gasket 4 is disposed at the bottom of the sealing body 24 .

[0026] In a possible implementation manner, a water outlet interface 5 is further provided on the side of the lower sealed cavity 13 .

[0027] In a possible implementation, the drain valve includes a valve body 1, a valve stem 2, and a water outlet joint 5. The valve body 1 is provided with a lower sealing cavity 13, and a water outlet joint 5 is provided outside the lower sealing cavity 13. The water outlet joint 5 is provided with a threaded structure, and the two are connected by threads + sealant. The valve stem 2 is provided with two sealing structures, radial and end face. The radial seal adopts a sealing ring 3, and the end face seal adopts a sealing gasket 4. The valve stem 2 is connected to the valve body 1 by threads, and the valve is opened and closed by rotating the valve stem 2. The sealing ring 3 plays a sealing role during the opening process, and the liquid is discharged from the water outlet joint 5. The closing is sealed by the end face sealing gasket to block the liquid in the system from flowing into the valve body 1. At the same time, a knurled handle 21 is provided on the top circumference of the valve stem 2 to improve the feel of use.

[0028] Working principle, see Figure 4 The existing technology uses a hard seal structure drain valve, which is prone to leakage and jamming. Figure 1-3 As shown, the sealing ring 3 and the sealing gasket 4 are respectively assembled on the valve stem 2, the valve stem 2 is provided with a threaded section 23, and is connected to the threaded cavity 12 of the valve body 1 through the threaded section 23. The valve body 1 is provided with an upper sealing cavity 11 and a lower sealing cavity 13, and the sealing cavity is provided with an upper and lower sealing structure. The sealing structure of the lower sealing cavity 13 is designed as an arc boss 6. By rotating the valve stem 2, the rectangular sealing gasket 4 is in contact with the arc boss 6, thereby achieving the opening and closing function. When the lower sealing cavity 13 is opened, the liquid in the system flows out from the water outlet joint 5, thereby achieving the function of drainage.

[0029] During use, the valve water inlet interface 15 is connected to the system through threads. When the valve is open, water enters the water inlet interface 15 and water flows out of the water outlet connector 5. When the drainage meets the requirements, the valve stem 2 is screwed to the lower sealing point to realize the valve closing function.

[0030] The soft-sealed drain valve of the present application avoids the problem of getting stuck and improves the reliability of the seal.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drain valve with a soft sealing structure, characterized in that: The invention comprises a valve body (1), wherein a valve stem (2) is inserted into the upper end of the valve body (1), and the valve body (1) comprises an upper sealing chamber (11), a threaded chamber (12), a lower sealing chamber (13), a water inlet channel (14) and a water inlet interface (15) which are arranged in sequence from top to bottom. An arc-shaped boss (16) is arranged on the outer side of the upper end of the water inlet channel (14), and a sealing gasket (4) is provided at the bottom of the valve stem (2), and the sealing of the water inlet channel (14) is achieved by squeezing the sealing gasket (4) by the arc-shaped boss (16).

2. A drain valve with a soft sealing structure as claimed in claim 1, characterized in that: The valve stem (2) comprises a knurled handle (21), a sealing ring groove (22), a threaded section (23) and a sealing body (24) which are arranged in sequence from top to bottom.

3. A drain valve with a soft sealing structure as claimed in claim 2, characterized in that: The sealing ring clamping groove (22) is arranged in the upper sealing cavity (11), and a sealing ring (3) is clamped in the sealing ring clamping groove (22), so that the upper sealing cavity (11) is sealed by the sealing ring (3).

4. A drain valve with a soft sealing structure as claimed in claim 2, characterized in that: The threaded section (23) is screwed into the threaded cavity (12).

5. A drain valve with a soft sealing structure as claimed in claim 2, characterized in that: The sealing body (24) is arranged in the lower sealing cavity (13), and the sealing pad (4) is arranged at the bottom of the sealing body (24).

6. A drain valve with a soft sealing structure as claimed in claim 1, characterized in that: A water outlet interface (5) is also provided on the side of the lower sealed cavity (13).

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