CN205331519U - Y rising -down check valve that appears - Google Patents

Abstract

The utility model relates to the technical field of the check valve industry, in particular to a Y-shaped lifting check valve, which includes a valve body, a valve seat and a valve cover. The upper surface of the valve seat is fixed with a valve disc, and the side wall of the valve disc is provided with a keyway, which is fixedly connected with the inner cavity of the valve body through a guide flat key; the valve disc is fixedly connected with the valve cover through a cylindrical spring, and is fully threaded. The studs connect the bonnet pre-tightening plate with the bonnet, and the inner cavity of the control end is embedded with segmented positioning rings, backing rings and sealing rings; the cone angle of the seat sealing cone is 40 degrees, and the cone of the valve sealing cone The angle is 50 degrees. When using the utility model, the device has good sealing performance, no leakage, no friction and scratches on the sealing surface; small operating torque, flexible opening and closing, and higher Cv value compared with similar products. The utility model has the advantages of simple structure, reasonable setting, low manufacturing cost and the like.

Description

A Y-shaped lifting check valve

technical field

The utility model relates to the technical field of the check valve industry, in particular to a Y-shaped lifting check valve.

Background technique

A valve is a component that restricts the flow and pressure of fluid flowing in a pipe. According to different application purposes, it is divided into cut-off valves and regulating valves. Shut-off valves are used to cut off fluid flow, usually gate valves, globe valves, check valves, etc.

Among them, the Y-shaped lifting check valve is a relatively common valve in the check valve. In order to prevent the jamming of the valve clack in the usual Y-shaped lift check valve, the outlet of the flow channel matched with the valve clack in the middle cavity of the valve body A guiding rib is set at every position, the setting of this rib not only reduces the flow channel area at the outlet, but also increases the resistance to the fluid, which has a great impact on the Cv value of the valve. During the opening process and after the valve disc is opened, it will rotate due to the impact of the medium. This rotation will generate torque on the return spring installed on the valve disc, which will have an adverse effect on the spring and will have adverse effects on the sealing and operation of the valve. influences.

Therefore, it is necessary to carry out further technological innovation to the structure of the existing Y-shaped lifting check valve.

Contents of the invention

The purpose of this utility model is to provide a Y-shaped lifting check valve with simple structure, reasonable design and convenient use in view of the defects and deficiencies of the prior art.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a Y-shaped lifting check valve described in the utility model, including a valve body, a valve seat and a valve cover, the valve body is provided with a control end, an inlet end and outlet end, the inner cavity of the control end is provided with a valve seat, which also includes a fully threaded stud, the upper surface of the valve seat is fixedly provided with a valve clack, and the side wall of the valve clack is provided with a keyway, the The keyway is fixedly connected with the inner cavity of the valve body through the guide flat key; the inner cavity of the valve disc is embedded with a cylindrical spring, the top end of the cylindrical spring is fixedly connected with the valve cover, and the port of the control end is fixedly provided with a valve Cover pre-tightening plate, one end of the fully threaded stud passes through the through hole of the bonnet pre-tightening plate and is threadedly connected with the screw hole of the bonnet, and the other end of the full-threaded stud is threaded with the nut; the control The card slot of the end cavity is embedded with a segmented positioning ring, and the segmented positioning ring is arranged between the valve cover pre-tightening plate and the valve cover; the inner cavity wall of the control end is embedded with a backing ring and a sealing ring; along the control end Seen in the axial direction, the sealing ring is arranged between the backing ring and the segmented positioning ring; viewed in the radial direction of the control end, the backing ring and the sealing ring are arranged between the valve cover and the inner wall of the valve body; the valve seat The seat sealing cone surface matches the valve sealing cone surface of the valve body, the cone angle of the seat sealing cone surface is 40 degrees, and the cone angle of the valve sealing cone surface is 50 degrees.

Further, the bottom end of the cylindrical spring is embedded and fixed in the boss on the upper surface of the valve seat.

Further, the central screw hole on the surface of the pre-tightening plate of the valve cover is threadedly connected with an eyebolt screw.

After adopting the above structure, the beneficial effects of the utility model are as follows: when the utility model is used, the device has good sealing performance, no leakage, and no friction and scratches on the sealing surface; during the production process, it can save materials and reduce costs; The disassembly and maintenance are convenient and fast, the operating torque is small, the opening and closing are flexible, and it has a higher Cv value compared with similar products. The utility model has the advantages of simple structure, reasonable setting, low manufacturing cost and the like.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of valve body;

Fig. 3 is a structural schematic diagram of the connection between the valve seat and the valve clack.

Explanation of reference signs: 1. Valve body; 1-1. Valve sealing cone surface; 2. Valve seat; 2-1. Seat sealing cone surface; 3. Guide flat key; 4. Valve disc; 4-1. Keyway; 5. Cylindrical spring; 6. Bonnet; 7. Backing ring; 8. Sealing ring; 9. Segmented positioning ring; 10. Bonnet pre-tightening plate; .

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1-3, a Y-shaped lifting check valve described in the present invention includes a valve body 1, a valve seat 2 and a valve cover 6, and the valve body 1 is provided with a control end, an inlet end and a At the outlet end, the inner cavity of the control end is provided with a valve seat 2, which also includes a fully threaded stud 11, the upper surface of the valve seat 2 is fixedly provided with a valve disc 4, and the side wall of the valve disc 4 is provided with The keyway 4-1, the keyway 4-1 is fixedly connected with the inner chamber of the valve body 1 through the guide flat key 3, so as to prevent the rotation of the valve flap 4 and jamming during the lifting process. The inner cavity of the valve disc 4 is embedded with a cylindrical spring 5, the top of the cylindrical spring 5 is fixedly connected with the valve cover 6, the port of the control end is fixedly provided with a valve cover pre-tightening plate 10, and the full-thread screw One end of the post 11 passes through the through hole of the bonnet pre-tightening plate 10 and is threadedly connected with the screw hole of the bonnet 6, and the other end of the fully threaded stud 11 is threadedly connected with the nut 12; The groove is embedded with a segmented positioning ring 9, and the segmented positioning ring 9 is arranged between the valve cover pre-tightening plate 10 and the valve cover 6; the inner cavity wall of the control end is embedded with a backing ring 7 and a sealing ring 8; along the control Viewed from the axial direction of the control end, the sealing ring 8 is arranged between the backing ring 7 and the segmented positioning ring 9; viewed from the radial direction of the control end, the backing ring 7 and the sealing ring 8 are arranged on the inner cavity wall of the valve cover 6 and the valve body 1 between.

The seat sealing cone surface 2-1 of the valve seat 2 matches the valve sealing cone surface 1-1 of the valve body 1, the cone angle of the seat sealing cone surface 2-1 is 40 degrees, and the valve sealing cone surface 1-1 The cone angle is 50 degrees; the valve seat seal adopts line contact seal.

Further, the bottom end of the cylindrical spring 5 is embedded and fixed in the boss on the upper surface of the valve seat 2 .

Further, the central screw hole on the surface of the valve cover pre-tightening plate 10 is threaded with an eyebolt 13 .

When using the utility model, the sealing performance of the device is good, no leakage, no friction and scratches on the sealing surface; in the production process, it can save materials and reduce costs; the disassembly and maintenance are convenient and fast, the operation torque is small, and the opening and closing Flexible, with higher Cv value compared with similar products. In addition, the structure is simple, the design is reasonable, and the manufacturing cost is low.

The above is only a preferred embodiment of the utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the utility model patent application scope are all included in the utility model patent application scope .

Claims (3)

1. a Y shape lift check valve, including valve body (1), valve seat (2) and valve gap (6), described valve body (1) is provided with control end, entrance point and the port of export, the inner chamber of described control end is provided with valve seat (2), it is characterized in that: it also includes full thread stud (11), the upper surface of described valve seat (2) is fixedly installed flap (4), the sidewall of described flap (4) is provided with keyway (4-1), and this keyway (4-1) is fixedly connected by the inner chamber of dive key (3) Yu valve body (1)；The inner chamber of described flap (4) is embedded with cylindrical spring (5), the top of described cylindrical spring (5) and valve gap (6) are fixedly connected, the port of described control end is fixedly installed valve gap pretension plate (10), threadeding mutually with the screw of valve gap (6) in described full thread stud (11) one end after the through hole of valve gap pretension plate (10), described full thread stud (11) other end is threadeded mutually with nut (12)；The draw-in groove of described control end inner chamber is embedded with split fix ring (9), and split fix ring (9) is arranged between valve gap pretension plate (10) and valve gap (6)；Described control end internal chamber wall is embedded with gasket ring (7) and sealing ring (8)；Along control end axially, sealing ring (8) is arranged between gasket ring (7) and split fix ring (9)；Always seeing along the footpath controlling end, gasket ring (7), sealing ring (8) are arranged between the internal chamber wall of valve gap (6) and valve body (1)；

The seat sealing cone (2-1) of described valve seat (2) matches with the valve sealing cone (1-1) of valve body (1), and the cone angle of seat sealing cone (2-1) is 40 degree, and the cone angle of valve sealing cone (1-1) is 50 degree。

2. a kind of Y shape lift check valve according to claim 1, it is characterised in that: the bottom of described cylindrical spring (5) is embedded in the boss of valve seat (2) upper surface。

3. a kind of Y shape lift check valve according to claim 1, it is characterised in that: the center screw on described valve gap pretension plate (10) surface is threaded lifting bolt (13)。