CN201621336U - Buffer swing check valve - Google Patents

Abstract

The utility model relates to a check valve, and particularly provides a cushion swing check valve applicable to the conditions of high temperature and severe working condition. The cushion swing check valve structurally comprises a valve body provided with an inlet passage and an outlet passage; a valve cover is arranged above the valve body; a valve seat is arranged inside the valve body; a valve clack arranged on the valve seat is connected with one end of a rocking bar through a nut and a gasket; the other end of the rocking bar is fixed onto a rocking bar shaft inside the valve body; and a linkage device arranged outside the valve body is further fixed onto the rocking bar shaft. Compared with the prior art, the cushion swing check valve has the advantages of reasonable design, simple structure, low noise and capabilities of controlling flow and performing remote operation under high-temperature and high-pressure conditions.

Description

Buffer swing check valve

technical field

The utility model relates to a check valve, in particular to a buffer swing check valve suitable for high temperature and harsh working conditions.

Background technique

Existing check valves all use 5° inclined disc, which is in contact with the sealing surface of the valve body by its own weight. In actual use, this structure produces a lot of noise, and the service life of the valve is short, which greatly limits Its range of application cannot control the flow of the valve.

Contents of the invention

The utility model aims at the above deficiencies, and provides a buffer swing check valve with reasonable design, simple structure, low noise, flow control and remote operation in high temperature and high pressure environment.

The technical scheme that the utility model solves its technical problem adopts is:

A buffer swing check valve, comprising a valve body provided with an inlet and outlet channel, a valve cover is arranged above the valve body, a valve seat is arranged in the valve body, and a disc is arranged on the valve seat, so The valve flap is connected to one end of the rocker through a nut and a gasket, and the other end of the rocker is fixed on the rocker shaft in the valve body, and a connecting rod arranged outside the valve body is also fixed on the rocker shaft. device.

The other end of the rocker is held fixed to the rocker shaft by a flat key.

The connecting rod device includes a connecting rod. One end of the connecting rod is fixed on the rocker shaft, and the other end is provided with a weight. The middle part of the connecting rod is connected to one end of the oil cylinder device. It is fixed on the outer wall of the valve, and the upper and lower oil return pipes of the oil cylinder device are provided with pneumatic ball valves.

A lifting ring is arranged on the valve cover.

A split ring is arranged outside the rocker shaft, and graphite packing is placed between the rocker shaft and the shaft cavity, and the outermost end of the shaft cavity is fixed with a packing gland by a high-pressure bolt.

The buffer swing check valve of the utility model is provided with a valve body with an inlet and outlet channel, and a connecting rod device is arranged outside the valve body, so that the valve clack inside the valve will not cause the problem of large noise when it is designed. The connecting rod and heavy hammer play the role of slow closing, which greatly improves the service life of the valve and has a tight sealing effect. The disc is designed to be opened and closed through the rotation of the connecting rod. The pneumatic ball valve designed on the cylinder of the connecting rod outside the valve body can remotely control the flow rate when the valve is opened. The pneumatic ball valve can fix the disc when the valve is opened, so that the disc is in the In any state, it is possible to control the flow rate when the valve is open and make other remote control. Compared with the prior art, it has the characteristics of reasonable design, simple structure, low noise, flow control and remote operation under high temperature and high pressure environment.

Description of drawings

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

Fig. 1 is a structural front view of a cushioning swing check valve;

Fig. 2 is a structural top view of a buffer swing check valve.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

A preferred embodiment is given below:

As shown in the drawings, a buffer swing check valve includes a valve body 1 provided with an inlet and outlet channel, a valve cover 2 is arranged above the valve body 1, and a valve seat 3 is arranged inside the valve body 1 , the valve seat 3 is provided with a disc 4, the disc 4 is connected to one end of the rocker 7 through a nut 5 and a gasket 6, and the other end of the rocker 7 is fixed on the rocker shaft in the valve body 1 8, the rocker shaft 8 is also fixed with a connecting rod device arranged outside the valve body 1 .

The other end of rocking bar 7 is kept fixed with rocking bar shaft 8 by flat key 9.

The connecting rod device includes a connecting rod 10. One end of the connecting rod 10 is fixed on the rocker shaft 8, and the other end is provided with a weight 11. The middle part of the connecting rod 10 is connected to one end of the oil cylinder device 12, and the other end of the oil cylinder device 12 is The oil cylinder fixed shaft 13 provided at one end is fixed on the outer wall of the valve body 1 , and the upper and lower oil return pipes of the oil cylinder device 12 are provided with pneumatic ball valves 14 .

A lifting ring 15 is arranged on the valve cover 2 .

A split ring 16 is arranged outside the rocker shaft 8 , and graphite packing 17 is placed between the rocker shaft 16 and the shaft cavity, and the outermost end of the shaft cavity is fixed with a packing gland 19 by a high-pressure bolt 18 .

In the cushioning swing check valve of the present utility model, the valve disc 4 is spherical, and is connected with the rocker 7 through the gasket 6 and the nut 5, and the gap of 2 mm allows the valve disc 4 to be in contact with the sealing surface in the valve body 1. Automatically adjust to the best angle when in contact, the connecting rod device is equipped with a hammer 11, the oil cylinder device 12 is fixed with the connecting rod 10, a pneumatic ball valve 14 is installed in the upper and lower oil return pipes of the oil cylinder device 12, and the fixed shaft 13 at the bottom of the oil cylinder is fixed on the valve On the body 1, the rocker shaft 8 is equipped with a split ring 16, which plays the role of preventing blowout, and then installs graphite packing 17, which is pressed with a packing gland 19, connected with high-pressure bolts 18, and the middle of the valve cover 2 is equipped with A suspension ring 15 is designed for convenient lifting.

The above-mentioned embodiment is only a kind of preferred embodiment of the utility model, and the usual changes and replacements carried out by those skilled in the art within the scope of the technical solutions of the utility model should be included in the protection scope of the utility model Inside.

Claims (5)

1. A cushioning swing check valve, comprising a valve body provided with an inlet and outlet channel, a valve cover is arranged above the valve body, a valve seat is arranged in the valve body, and a valve disc is arranged on the valve seat , it is characterized in that, the valve disc is connected to one end of the rocker through a nut and a gasket, the other end of the rocker is fixed on the rocker shaft in the valve body, and the rocker shaft is also fixed with a Linkage outside the valve body. 2 . The cushioning swing check valve according to claim 1 , wherein the other end of the rocker is fixed to the rocker shaft through a flat key. 3 . 3. A cushioning swing check valve according to claim 1, characterized in that the connecting rod device comprises a connecting rod, one end of the connecting rod is fixed on the rocker shaft, and the other end is provided with a weight , the middle part of the connecting rod is connected to one end of the oil cylinder device, the oil cylinder fixed shaft provided at the other end of the oil cylinder device is fixed on the outer wall of the valve, and the upper and lower oil return pipes of the oil cylinder device are provided with pneumatic ball valves. 4 . The buffer swing check valve according to claim 1 , wherein a lifting ring is arranged on the valve cover. 4 . 5. A cushioning swing check valve according to claim 1, 2 or 3, characterized in that a split ring is arranged outside the rocker shaft, and a ring is installed between the rocker shaft and the shaft cavity. Graphite packing is inserted, and the outermost end of the shaft cavity is fixed to the packing gland by high-pressure bolts.

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