CN205173522U - Disk seat can be dismantled by choke valve - Google Patents

Abstract

The utility model discloses a cut-off throttle valve with a detachable valve seat, which belongs to the field of valve manufacturing. The valve seat detachable cut-off throttle valve includes a valve body, a sleeve and a valve stem arranged in the valve body, and a valve flap connected to the end of the valve stem; a circuitous medium fluid channel is arranged in the valve body; the lower end of the valve flap The metal valve seat is connected by screws, the metal valve seat and the valve body are bonded to form a metal hard seal, and a groove is formed between the outer peripheral surface of the metal valve seat and the valve disc, and a triangular explosion-proof sealing ring is arranged in the groove, and the explosion-proof sealing ring and The valve body contacts to form a soft seal; there is an oil seal space between the valve disc, the sleeve and the valve body, and an oil delivery device connected to the oil seal space is connected to one side of the valve body; the end of the valve stem A limit block is provided, and a valve disc gland is threadedly connected to the valve disc, and the valve disc is relatively fixed to the valve stem through the cooperation of the valve disc gland and the limit block. The utility model effectively enhances the service life of the valve.

Description

A cut-off throttle valve with a detachable valve seat

technical field

The utility model relates to the field of valve manufacturing, in particular to a cut-off throttle valve with a detachable valve seat.

Background technique

A throttle valve is a valve that controls fluid flow by changing the throttle section or throttle length. Most of the common cut-off throttle valves currently on the market push the valve disc close to the valve seat to close the pipeline, and then open it by rotating the valve stem to drive the rotation of the valve disc. However, in this mode, the valve stem and seat are prone to wear during the long-term opening and closing process, and when the worn valve stem and valve seat drive the valve disc to rotate, if the valve disc is deflected, the valve seat cannot produce a seal It is easy to cause leakage, especially in the process of shale gas exploitation, because of its high-pressure working conditions, it is extremely easy to bring safety hazards.

Utility model content

The utility model aims to provide a cut-off throttle valve with a detachable valve seat, which is opened and closed in a non-selective manner to solve the above problems.

In order to achieve the above object, the technical scheme of the utility model is as follows:

A cut-off throttle valve with a detachable valve seat, which is characterized in that it includes a valve body, a sleeve and a valve stem arranged in the valve body, and a disc connected to the end of the valve stem; a circuitous medium fluid channel is arranged in the valve body The lower end of the valve flap is connected with a metal valve seat by screws, and the metal valve seat and the valve body are bonded to form a metal hard seal, and a groove is formed between the outer peripheral surface of the metal valve seat and the valve flap, and a triangular explosion-proof seal is arranged in the groove The explosion-proof sealing ring is in contact with the valve body to form a soft seal; there is an oil seal space between the valve disc, the sleeve and the valve body, and an oil delivery device connected to the oil seal space is connected on one side of the valve body; The end of the valve stem is provided with a limit block, and the valve disc is threadedly connected with a valve disc gland, and the valve disc is relatively fixed with the valve stem through the cooperation of the valve disc gland and the limit block; the valve disc is movably connected with the sleeve, At least two annular grooves for placing sealing O-rings are formed on the contacting peripheral surface of the valve disc and the sleeve, and a slag storage tank is arranged between the two annular grooves.

Further, a slag scraping edge is provided on the outer circumference of the lower end surface of the valve disc, and the slag scraping edge is attached to the cylindrical valve sleeve.

Further, the sleeve is provided with a throttling groove on a side close to the medium outlet.

The beneficial effects of the utility model are:

1. The utility model is equipped with a slag storage tank, which can protect the upper sliding sealing ring of the valve sleeve. At the same time, a slag scraping edge is added under the valve disc to remove the medium and dirt attached to the lower part of the valve sleeve cavity, which can prevent the valve disc from falling when it closes downwards. Jamming situation.

2. Secondly, there is an oil seal space between the disc, the sleeve and the valve body, and an oil delivery device connected to the oil seal space is connected on one side of the valve body. Hydraulic oil is injected into the space, so that the valve disc is pressed down under the action of pressure until it is pressed against the valve body, and the end of the valve disc forms a metal hard seal with the valve body. When the valve is opened, the hydraulic oil in the oil seal space is removed through the oil delivery device, and the valve disc and the valve stem are pushed up to compress the oil seal space under the action of the fluid medium until the fluid medium can flow into the medium outlet through the throttling groove, and the valve stem There is no need to rotate, reducing the wear between the valve stem and disc, and opening and closing the valve is faster and easier.

3. Again, the valve seat of the utility model is detachable, and a groove is formed between the outer peripheral surface of the metal valve seat and the valve disc, and a triangular explosion-proof sealing ring is arranged in the groove, which can form a soft seal with the valve body. Hard double seal, not only easy to disassemble, but also better sealing effect.

Description of drawings

Fig. 1 is a schematic structural diagram of a cut-off throttle valve with a detachable valve seat provided by the utility model.

Marks in the figure: 1 is the valve body, 2 is the valve stem, 3 is the disc gland, 4 is the limit block, 5 is the oil delivery device, 6 is the throttling groove, 7 is the valve seat, 8 is the oil seal space, 9 Is a disc, 10 is an explosion-proof sealing ring, and 11 is a slag storage tank.

detailed description

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

As shown in Figure 1, a valve seat 7 detachable cut-off throttle valve includes a valve body 1, a sleeve and a valve stem 2 arranged in the valve body 1, and a valve flap 9 connected to the end of the valve stem 2; The valve body 1 is provided with a circuitous medium fluid channel; the lower end of the valve disc 9 is connected with a metal valve seat 7 by screws, and the metal valve seat 7 is bonded to the valve body 1 to form a metal hard seal. A groove is formed between the valve discs 9, and a triangular explosion-proof sealing ring 10 is arranged in the groove, and the explosion-proof sealing ring 10 contacts with the valve body 1 to form a soft seal; between the valve disc 9, the sleeve and the valve body 1 An oil seal space 8 is provided, and an oil delivery device 5 connected to the oil seal space 8 is connected to one side of the valve body 1; The cover 3 and the valve disc 9 are relatively fixed to the valve stem 2 through the cooperation of the valve disc gland 3 and the limit block 4; the valve disc 9 is movably connected with the sleeve, and there are at least two openings on the contact circumferential surface of the valve disc 9 and the sleeve. A ring groove for placing a sealing O-ring, and a slag storage tank 11 is arranged between the two ring grooves. The outer circumference of the lower end surface of the valve disc 9 is provided with a slag scraping edge, and the slag scraping edge fits the cylindrical valve sleeve. The sleeve is provided with a throttling groove 6 on the side close to the medium outlet.

When in use, the utility model is provided with a slag storage tank 11, which can protect the upper sliding sealing ring of the valve sleeve. At the same time, a slag scraping edge under the valve disc 9 is added to remove medium dirt from adhering to the lower part of the valve sleeve cavity, which can prevent the valve disc 9 from Jamming occurs when closing downwards. Secondly, there is an oil seal space 8 between the valve disc 9, the sleeve and the valve body 1, and an oil delivery device 5 connected to the oil seal space 8 is connected to the valve body 1 side. The oil device 5 injects hydraulic oil into the oil seal space 8, so that the valve disc 9 is pressed down under pressure until it is pressed against the valve body 1, and the end of the valve disc 9 and the valve body 1 form a metal hard seal. When the valve is opened, the hydraulic oil in the oil seal space 8 is removed through the oil delivery device 5, and the valve disc 9 and the valve stem 2 are moved up to compress the oil seal space 8 under the action of the fluid medium until the fluid medium can pass through the throttling groove 6 When the medium flows into the outlet, the valve stem 2 does not need to rotate, reducing the wear between the valve stem 2 and the valve disc 9, and opening and closing the valve is quicker and easier. Again, the valve seat 7 of the present utility model is detachable, and a groove is formed between the outer peripheral surface of the metal valve seat 7 and the valve flap 9, and a triangular explosion-proof sealing ring 10 is arranged in the groove, which can be connected with the valve body 1. A soft and hard double seal is formed between them, which is not only easy to disassemble, but also has a better sealing effect.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (3)

1. the detachable cut-off throttle valve of valve seat, is characterized in that: comprise valve body, sleeve and the valve rod be arranged in valve body, be connected to valve stem end flap; Roundabout medium fluid passage is provided with in described valve body; Described flap lower end has been connected by screw metal seat valve, metal seat valve and valve body are fitted and are formed metal hard-sealing, be formed with groove between metal seat valve outer peripheral surface and flap, be provided with triangle explosion-proof sealing ring in groove, explosion-proof sealing ring and valve body contact form soft seal; Described flap, between sleeve and valve body three, be provided with oil sealing space, and be connected with the oil delivering device with the conducting of oil sealing space in valve body side; Described valve stem end is provided with limiting stopper, and flap has been threaded flap gland, and flap coordinates relative with valve rod fixing by flap gland with limiting stopper; Described flap is flexibly connected with sleeve, and flap and barrel contacts circumferential surface have at least two and place the annular groove sealing O shape and enclose, and are provided with storage slag chute between two annular grooves.

2. the detachable cut-off throttle valve of valve seat according to claim 1, is characterized in that: described flap lower end surface excircle is provided with scrapes slag cutting edge, scrapes slag cutting edge laminating tubular valve pocket.

3. the detachable cut-off throttle valve of valve seat according to claim 1, is characterized in that: described sleeve is provided with throttling groove near media outlet side.