CN202561069U - Self-relieving double disc soft seal butterfly valve - Google Patents

Abstract

The utility model discloses a self-pressure-relief double-valve-plate soft sealing butterfly valve, which comprises a tubular valve body, wherein an upper half shaft and a lower half shaft are rotatably arranged above and below the valve body, the two ends of the valve body are respectively an inlet end and an outlet end, a left valve plate and a right valve plate are respectively and fixedly mounted on two sides of the lower end of the upper half shaft, a pressing sleeve is fixed in the inlet end, a sealing ring body is arranged at the top of the front end of the pressing sleeve, the sealing ring body is attached to the left valve plate and the edge of the right valve plate, torsion springs are respectively sleeved on the upper half shaft and the lower half shaft, one ends of the torsion springs are fixed on the upper half shaft and the lower half shaft, the other ends of the torsion springs are fixed in the valve body, a connecting body is connected between the left valve plate and the right valve plate, a water passing channel is arranged in the connecting body and comprises a conical hole section, a sealing ball is arranged in the conical hole section, and a pre. The utility model has the advantages of reasonable design, easy dismouting and maintenance to can install at the optional position, simple structure, compactness, the operating torque is little, and 90 degrees gyration are opened rapidly, utilize the check valve to let out too high water pressure, prevent that water pressure is too high to influence butterfly valve working life.

Description

Self-relieving double disc soft seal butterfly valve

technical field

The utility model relates to the field of butterfly valves, in particular to a self-relieving double valve plate soft-sealing butterfly valve.

Background technique

At present, the self-relieving double valve plate soft-sealing butterfly valve, as a component used to realize the on-off and flow control of the pipeline system, has been widely used in many fields such as petroleum, chemical industry, metallurgy, and hydropower. In the known butterfly valve technology, its sealing form mostly adopts a sealing structure, and the sealing material is rubber, polytetrafluoroethylene, etc. Due to the limitations of structural features, it is not suitable for industries such as high temperature resistance, high pressure resistance, corrosion resistance, and wear resistance.

Utility model content

The purpose of this utility model is to provide a self-relieving double-plate soft-sealed butterfly valve, which adopts a double-layer structure and is reasonably designed, easy to disassemble and maintain, and can be installed at any position. The structure is simple and compact, and the operating torque is small. 90 The high-speed rotary opens quickly, and the high water pressure is released by the one-way valve to prevent the high water pressure from affecting the working life of the butterfly valve.

The technical scheme of the utility model is as follows:

The self-relieving double valve plate soft-sealed butterfly valve includes a tubular valve body. The upper and lower parts of the valve body are rotated with an upper half shaft and a lower half shaft. The two ends of the valve body are the inlet end and the outlet end respectively. The left valve plate and the right valve plate are respectively fixedly installed on both sides of the lower end of the upper half shaft, and the upper end of the lower half shaft is rotated with the lower end of the left valve plate or the right valve plate. There is a sealing ring body, the sealing ring body is fitted with the edge of the left valve plate and the right valve plate, the upper half shaft and the lower half shaft are respectively fitted with torsion springs, and one end of the torsion spring is fixed on the upper half shaft and the lower half shaft The other end is fixed in the valve body. There is a connecting body between the left valve plate and the right valve plate. There is a water passage in the connecting body. The water passage includes a conical hole section. A preloaded spring is placed on the outside of the ball.

A sealing sleeve is provided between the upper half shaft and the valve seat at the top of the valve body, and a plurality of sealing rings are arranged in the sealing sleeve.

The utility model has a left valve plate and a right valve plate, the structural design is reasonable, easy to disassemble and maintain, and can be installed at any position. Excessive water pressure to prevent excessive water pressure from affecting the working life of the butterfly valve.

Description of drawings

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

Detailed ways

Referring to the accompanying drawings, the self-relieving double-plate soft-sealed butterfly valve includes a tubular valve body 1, an upper half shaft 2 and a lower half shaft 3 are provided for rotation above and below the valve body 1, and the two ends of the valve body are respectively The inlet end 4, the outlet end 5, the left valve plate 6 and the right valve plate 10 are respectively fixedly installed on both sides of the lower end of the upper half shaft, the upper end of the lower half shaft 3 is connected with the left valve plate or the right valve plate, and a pressure valve is fixed inside the inlet end. Sleeve 7, the front end of pressure sleeve 7 is topped with a seal ring body 8, the seal ring body 8 and the edge of the left valve plate 6 are fitted together, the upper half shaft 2 and the lower half shaft 3 are respectively sleeved with a torsion spring 11, and the torsion spring One end of 11 is fixed on the upper half shaft and the lower half shaft, and the other end is fixed in the valve body. There is a sealing sleeve 9 between the upper half shaft and the valve seat at the top of the valve body. There are multiple sealing rings inside the sealing sleeve 9. There are protrusions on both sides of the sealing ring body, and the inner wall has a protruding flange. A connecting body 12 is connected between the left valve plate and the right valve plate. A water passage 13 is opened in the connecting body 12. The water passage 13 includes a cone The hole section 14 is provided with a sealing ball 15 in the conical hole section, and a preload spring 16 is placed on the outside of the sealing ball 15.

Claims (2)

1. from pressure-relief type bivalve plate soft sealing butterfly valve, include the valve body of tubulose, the top of valve body, below are rotated and are provided with semiaxis, following semiaxis; It is characterized in that: said two ends of valve body is respectively entrance point, outlet end, and the both sides, lower end of last semiaxis are installed with left valve plate, right valve plate respectively, and the lower end of the upper end of following semiaxis and left valve plate or right valve plate is rotated and is provided with; The entrance point internal fixation has gland, and the front end overhead of gland has the sealing circle body, fits and be provided with in the edge of sealing circle body and left valve plate, right valve plate; Be respectively installed with torsion spring on last semiaxis, the following semiaxis; One end of torsion spring is fixed on semiaxis, the following semiaxis, and the other end is fixed in the valve body, is connected with connecting body between left valve plate and the right valve plate; Had water channel in the connecting body; Cross water channel and include the conical bore section, be provided with ball sealer in the conical bore section, the outer side pressure of ball sealer is equipped with loaded spring.

2. according to claim 1 from pressure-relief type bivalve plate soft sealing butterfly valve, it is characterized in that: be provided with stuffing box gland between the valve seat on described upward semiaxis and valve body top, be provided with a plurality of seal rings in the stuffing box gland.

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