CN202691170U

CN202691170U - Ultrahigh-pressure double-flap check valve

Info

Publication number: CN202691170U
Application number: CN 201220336186
Authority: CN
Inventors: 刘建同; 吴浩; 黄晖
Original assignee: SUZHOU DAOSEN VALVE CO Ltd
Current assignee: SUZHOU DAOSEN VALVE CO Ltd
Priority date: 2012-07-12
Filing date: 2012-07-12
Publication date: 2013-01-23
Anticipated expiration: 2022-07-12

Abstract

The utility model discloses an ultrahigh-pressure double-flap check valve, comprising a valve body, valve flaps, a rotary shaft and a sealing ring and also comprising an embedded type bracket for fixing the rotary shaft, wherein the embedded type bracket consists of an upper bracket plate, a lower bracket plate, positioning blocks, pin shafts and screws; one end of each bracket plate is made into a pin shape, and the other end of each bracket plate is tapped with threads; the pin-shaped end of each bracket plate is inserted into a pin hole of the valve body for positioning, and the end tapped with the threads is connected with the positioning blocks by using the screws; and the positioning blocks are embedded in positioning grooves of the valve body. The ultrahigh-pressure double-flap check valve disclosed by the utility model has the advantages that the axial movement of the whole bracket can be prevented, and the purpose of fixing the rotary shaft and the valve flaps is achieved, so that zero external leakage is realized; and the structure is safe and reliable.

Description

The ultrahigh pressure Double-disc type check valve

Technical field

The utility model relates to a kind of safety check, and particularly a kind of use can effectively prevent the ultrahigh pressure API 6A Double-disc type check valve that medium flows backwards in the oil well head device.

Background technique

In the oil well head device, in order in case of emergency effectively to bring into play the effect of safety check, should adopt the higher valve of safe and reliable coefficient.Traditional Double-disc type check valve comprises valve body, flap, rotating shaft, seal ring, top lower two plug screws of its rotating shaft are fixed, the highest pressure that can only bear 10000psi of this structure can produce leakage when there is manufacturing deficiency in screw thread itself or surpasses the screw thread rated working pressure.

Summary of the invention

Goal of the invention of the present utility model is in order to overcome the shortcoming in the above-mentioned background technology, traditional Double-disc type check valve to be transformed, and all very high ultrahigh pressure Double-disc type check valves of a kind of applicability and safety coefficient are provided.

The technical solution of the utility model is: a kind of ultrahigh pressure Double-disc type check valve, comprise valve body, flap, rotating shaft, seal ring, it also comprises the embedded support of fixed rotating shaft, this embedded support is by two supporting plates, positioning block, bearing pin and screws consist of up and down, supporting plate one end is made pin-shaped, and an end tapping, a pin-shaped end insert location in the valve body pin-and-hole, tapping one end is connected with positioning block with screw, and positioning block is embedded in the locating slot of valve body.

The beneficial effects of the utility model are: embedded support can prevent that whole support from moving axially, and reaches the purpose of fixed rotating shaft and flap, thereby realizes zero external leakage, and this structural safety is reliable, the pressure of the applicable 15000psi of high energy.

Description of drawings

Fig. 1 is the utility model structural drawing;

Fig. 2 is the A-A sectional drawing of Fig. 1;

Fig. 3 is the B-B sectional drawing of Fig. 1;

Fig. 4 is the partial enlarged drawing of C position among Fig. 3;

Wherein: 1, valve body, 2, flap, 3, rotating shaft, 4, bearing pin, 5, supporting plate, 6, positioning block, 7, compression spring, 8, screw, 9, spring.

Embodiment

Below in conjunction with the drawings and the specific embodiments the utility model is further described:

As shown in Figures 1 to 4: the present embodiment is by valve body 1, flap 2, rotating shaft consists of, the present embodiment adopts embedded support fixed rotating shaft 3, embedded support is by two supporting plates 5 up and down, positioning block 6, the compositions such as bearing pin 4 and screw 8, supporting plate 5 one ends are made pin-shaped, one end tapping, a pin-shaped end inserts location in the valve body pin-and-hole, tapping one end is connected with positioning block 6 with screw 8, positioning block 6 is embedded in the locating slot of valve body, compression spring 7 can prevent effectively that screw 8 is loosening, thereby prevent that whole support from moving axially, reach the purpose of fixed rotating shaft 3 and flap 2, realize valve function, also can realize valve zero external leakage requirement, thereby satisfy the needs that valve is used for the ultrahigh pressure operating mode.

Valve opening: medium is pushed flap 2 under pressure open, and flap 2 is 3 rotations around the shaft, valve opening.

Valve closing: the upstream pressure medium disappears, and flap 2 resets under the effect of spring 9 elastic force and closes, and flap 2 sealing surfaces and valve body sealing surface are fitted, and prevents that medium from flowing backwards valve closing.

Claims

1. ultrahigh pressure Double-disc type check valve, comprise valve body, flap, rotating shaft, seal ring, it is characterized in that also comprising the embedded support of fixed rotating shaft, this embedded support is by two supporting plates, positioning block, bearing pin and screws consist of up and down, supporting plate one end is made pin-shaped, and an end tapping, a pin-shaped end insert location in the valve body pin-and-hole, tapping one end is connected with positioning block with screw, and positioning block is embedded in the locating slot of valve body.