CN102606751A

CN102606751A - Three-section bidirectionally-sealed high-pressure butterfly valve

Info

Publication number: CN102606751A
Application number: CN2011101334858A
Authority: CN
Inventors: 李晓明; 金智勇; 金智政
Original assignee: ZHEJIANG ONEIST VALVE CO Ltd
Current assignee: ZHEJIANG ONEIST VALVE CO Ltd
Priority date: 2011-05-18
Filing date: 2011-05-18
Publication date: 2012-07-25

Abstract

A three-section bidirectionally-sealed high-pressure butterfly valve comprises a valve body and a bonnet connected to the valve body. A valve plate, a valve rod, a sealing ring, a pressure plate ring and a protective sleeve are arranged in the valve body and the bonnet. The three-section bidirectionally-sealed high-pressure butterfly valve is characterized in that the sealing ring is arranged on the inner side of a connecting end of the bonnet with the valve body and fastened onto the bonnet through the pressure plate ring and a socket head cap screw. The three-section bidirectionally-sealed high-pressure butterfly valve has the advantages of high pressure resistance, bidirectional sealing and the like, the defects of traditional butterfly valves are overcome, and the three-section bidirectionally-sealed high-pressure butterfly valve is simple in structure and diversified in processing technology, and can be formed by casting, forging and welding.

Description

3 stops two way sealed high pressure butterfly valve

Technical field:

The present invention relates to a kind of valving that in pipe-line system, blocks or regulate flow.

Background technique:

At present, traditional butterfly valve is to make open-shut device with the valve plate of circle, realizes opening and closing through rotational valve plate; Because traditional butterfly valve receives the restriction of its structure characteristic; Usually only be applicable to the pipe-line system of mesolow, and along with expanding economy, commercial plant develops to high parameter, maximization direction constantly; The working condition of pipe-line system also becomes increasingly complex; Under many circumstances, the working condition of valve applications have simultaneously high pressure and double fluid to situation, therefore traditional butterfly valve has satisfied not the demand of industrial piping system operating mode.

Summary of the invention:

For satisfy have simultaneously in the industrial piping system high pressure and double fluid to working condition, the present invention provides a kind of 3 stops two way sealed high pressure butterfly valve, this butterfly valve has advantages such as high pressure resistant and two way sealed, has remedied the deficiency of traditional butterfly valve.

The technical solution adopted for the present invention to solve the technical problems is: a kind of 3 stops two way sealed high pressure butterfly valve, and comprise valve body and be connected the valve gap on the valve body, in valve body and valve gap, be provided with valve plate, valve rod, seal ring, pressing plate circle, protecting jacket; It is characterized in that: the 3 stops valve body structure, be provided with seal ring in the inboard of valve gap and valve body connecting end, seal ring is fastened on the valve gap through pressing plate circle and socket head screw.

Further characteristic is: valve plate is made up of valve plate frame and valve disc, is processed with the step that matches with valve plate frame at the back side of valve disc, is fastened on the valve plate frame with socket head screw, is provided with protecting jacket at the axial two ends of valve plate frame; Valve rod is made up of upper valve rod and lower valve rod, and valve plate is installed in the body cavity through valve rod and protecting jacket.

The invention has the beneficial effects as follows: high pressure resistant, sealability reaches two way sealed does not have leakage, operates free and relaxed; The output terminal torque is low, opens and closes rapidly, and the valve plate flow resistance is little; Pressure drop coefficient is low, and simple in structure, the processing technology diversification; But both castings, also wrought moulding also can welding fabrication.

Description of drawings:

Below in conjunction with accompanying drawing and embodiment the present invention is further specified.

Fig. 1 is the integrally-built longitudinal sectional view of the present invention.

Fig. 2 be Fig. 1 left-hand view partly cut open figure.

Fig. 3 is the left-hand view of valve plate Fig. 1 when opening 90 °.

Fig. 4 is a three-dimensional view of the present invention.

Among the figure: 1. tail-hood, 2. pad, 3. Lower shaft sleeve, 4. valve body, 5. valve gap, 6. seal ring 7. descends protecting jacket; 8. socket head screw, 9. lower valve rod, 10. lining, 11. valve discs, 12. valve plate frames, 13. upper valve rods; 14. pad, protecting jacket on 15., 16. socket head screws, 17. pads, 18. Upper shaft sleeves, 19. Packing seats; 20. filler, 21. Glands, 22. supports, 23. hexagon nuts, 24. stud bolts, 25. pressing plate circles.

Embodiment:

As shown in Figure 1; 3 stops two way sealed high pressure butterfly valve of the present invention; Comprise valve body (4) and valve gap (5), on the flange of the end of valve body (4) and valve gap (5) one ends, be processed with the bolt hole of mutual coupling, valve body (4) and valve gap (5) are tightened together through stud bolt (24) and hexagon nut (23); Inboard at valve gap (5) and valve body (4) connecting end is processed with step, the seal ring of in step, packing into (6), and seal ring (6) is fastened on the valve gap (5) through pressing plate circle (25) and socket head screw (16); Be processed with the step that matches with valve plate frame (12) at the back side of valve disc (11), be fastened on the valve plate frame (12) with socket head screw (8); In the end processing four directions of upper valve rod (13), valve plate frame (12) and processing of upper valve rod (13) joint and the cubic hole that upper valve rod (13) is complementary are installed valve rod (13) with cooperation; End processing at lower valve rod (9) is circular, and valve plate frame (12) and the processing of lower valve rod (9) joint and the circular hole that lower valve rod (9) is complementary are installed lower valve rod (9) to cooperate; Protecting jacket (15) is equipped with in joint at upper valve rod (13) and valve plate frame (12), and protecting jacket (7) is equipped with down in the joint of lower valve rod (9) and valve plate frame (12), to prevent valve plate frame (12) axial float and to avoid the erosion of medium to upper valve rod (13) and lower valve rod (9).

The working principle of 3 stops two way sealed high pressure butterfly valve of the present invention is: when drive unit was applied to upper valve rod (13) with moment, upper valve rod (13) drives valve plate frame (12) and valve disc (11) rotation realizes opening and closing.

Claims

1. a 3 stops two way sealed high pressure butterfly valve comprises valve body and is connected the valve gap on the valve body, in valve body and valve gap, is provided with valve plate, valve rod, seal ring, pressing plate circle, protecting jacket; It is characterized in that: the 3 stops valve body structure, be provided with seal ring in the inboard of valve gap and valve body connecting end, seal ring is fastened on the valve gap through pressing plate circle and socket head screw.

2. 3 stops two way sealed high pressure butterfly valve according to claim 1; It is characterized in that: valve plate is made up of valve plate frame and valve disc; Be processed with the step that matches with valve plate frame at the back side of valve disc, be fastened on the valve plate frame, be provided with protecting jacket at the axial two ends of valve plate frame with socket head screw; Valve rod is made up of upper valve rod and lower valve rod, and valve plate is installed in the body cavity through valve rod and protecting jacket.