CN206708536U - Compact Direct Action Type water attack release valve - Google Patents

Abstract

The utility model discloses a compact direct-acting water hammer relief valve. A sleeve (3) is arranged on a valve seat (2) in a valve body (1), and the sleeve (3) passes through a valve cover (8). Positioning, on the side wall of the sleeve (3) close to the end of the valve seat (2), there is a flow hole connecting the inlet port (1.1) and the outlet port (1.2), and the sleeve (3) is provided with the valve body ( 1) The inlet port (1.1) corresponds to the sealed regulating cylinder (4), and the regulating cylinder (4) connects or cuts off the inlet port (1.1) and the outlet port (1.2) when it moves up and down, and a spring is installed on the outside of the valve cover (8) Cover (10), the spring cover (10) is equipped with a piston barrel (6), a spring seat (11), and a spring (7) installed between the piston barrel (6) and the spring seat (11) . The utility model has the advantages of compact structure and convenient installation, and can guarantee the safe and effective operation of the pipe network system, and is a compact direct-acting water hammer relief valve.

Description

Compact Direct Acting Surge Relief Valve

technical field

The utility model relates to a valve, in particular to a water hammer direct-acting discharge valve with a compact sleeve structure.

Background technique

In the operation of the pipe network system, especially the long-distance pipe network system, there is a risk of water hammer due to sudden changes in the pressure in the pipe. speed. In the prior art, the valves used for water hammer protection of the pipe network mostly adopt the pilot-operated structure of the main valve and the pilot valve. pressure, it cannot be opened immediately in real time, and there is a risk of water hammer damage. There is also a spring direct acting type, which is sensitive in operation and quick in response. However, since the spring acts directly on the valve plate, it is only suitable for working conditions with low pressure and small caliber. When the system pressure is high and the valve caliber is large, multiple valves are required. Thick springs, many parts, bulky and complex structure, and multi-spring linkage, poor adjustability, and larger calibers are almost impossible to produce.

Contents of the invention

The technical problem to be solved by the utility model is to provide a compact pump that can adapt to large-caliber, high-pressure working conditions, can respond quickly in real time when water hammer occurs, is sensitive in action, compact in structure, easy to install, and can ensure the safe operation of the pipe network system. Type direct acting water hammer relief valve.

In order to solve the above technical problems, the utility model provides a compact direct-acting water hammer relief valve, which includes a valve body and a valve cover. A valve seat is provided between the inlet end and the outlet end of the valve body. The valve seat in the valve body is equipped with a sleeve, the sleeve is positioned through the valve cover, and the side wall of the sleeve near the end of the valve seat is opened to communicate with the The flow hole at the inlet end and the outlet end, the sleeve is provided with an adjustment cylinder corresponding to the inlet end of the valve body, and the adjustment cylinder connects or cuts off the flow hole when it moves up and down. Connecting or cutting off the inlet port and the outlet port, a spring cover is installed on the outside of the valve cover, a piston barrel, a spring seat are installed in the spring cover, and a spring seat installed between the piston barrel and the spring seat Spring, one end of the piston cylinder is matched with the spring cover, and a sealing ring is arranged between the spring cover, and the other end passes through the valve cover and enters the sleeve on the side of the valve body, and is connected with the adjustment cylinder by bolts. The top of the spring cover is provided with an adjusting bolt, and one end of the adjusting bolt passing through the spring cover is in contact with the spring seat, and the other end with the nut is exposed from the spring cover and is provided with a locking nut.

The side wall of the spring cover is provided with a first through hole near the end of the valve cover, and a cavity a is provided between the piston barrel and the valve cover, and the cavity a passes through the first through hole. A through hole is connected to one end of the conduit, the conduit is provided with a one-way adjustable valve, the other end of the conduit is connected to the oil cylinder, a cavity b is provided between the piston barrel and the spring cover, and the side of the spring cover The wall is provided with a second through hole near the top, and the cavity b communicates with the atmosphere through the second through hole.

The flow holes described are V-shaped flow holes.

The regulating cylinder, the piston cylinder and the spring cover are all located on the same central axis of the middle cavity of the valve body.

The installation method of the one-way adjustable valve is that the direction of the medium in the oil cylinder flowing through the valve to the cavity a is the free flow direction, and the direction of the medium in the cavity a flowing through the valve to the oil cylinder is the flow-limiting adjustable direction.

The valve body adopts an angle type, or is designed as a straight-through type.

The compact direct-acting water hammer relief valve adopting the above technical scheme directly drives the adjustment cylinder to open and close through the piston cylinder. The piston cylinder directly contacts the medium toward the valve body side, and the piston cylinder directly communicates with the atmosphere toward the spring cover side. Installed in the piston barrel, the piston barrel is directly compared with the medium pressure. The spring thrust can be set by the adjusting bolt. Once the pressure exceeds the spring setting value, the piston barrel moves up to push the spring to compress, and the medium in the cylinder quickly passes through the conduit, one-way adjustable. The valve and the first through hole are sucked into the cavity a, and the piston cylinder simultaneously drives the regulating cylinder to move up, so that the inlet port and the outlet port of the valve body are connected, and the valve is opened to release pressure. After the pressure relief is completed, the spring pushes the piston cylinder and the adjustment cylinder downward, and the medium in the cavity a is discharged back to the oil cylinder slowly and controllably through the first through hole, the one-way adjustable valve and the conduit, so as to realize the slow closing of the valve and prevent itself from closing the valve water hammer.

Since the cylindrical adjusting cylinder is used as the opening and closing part, the cylindrical adjusting cylinder has no blind plate thrust, the running resistance is small, and the opening and closing torque is small. Under the action of the medium pressure, a small piston area and spring force can be used. Compared with the prior art, the action of driving the valve not only has the sensitivity of direct action but also retains the characteristics of high pressure and large diameter of pilot type.

The spring is directly installed in the piston barrel, which has a compact structure and is easy to install.

At the same time, the V-shaped flow hole on the sleeve makes the valve opening and flow a linear relationship, so that the flow of the valve is stable during the opening and closing operation, and the "frequency jump" phenomenon of the pressure relief valve is avoided.

To sum up, the utility model is a large-diameter, high-pressure working condition, which can be opened quickly in real time when water hammer occurs, and can be controlled and slowly closed after the pressure is relieved. The action is sensitive, the structure is compact, and the installation is convenient. , The action pressure is adjustable, and it is a compact direct-acting water hammer relief valve that can ensure the safe and effective operation of the pipe network system.

Description of drawings

Figure 1 is a structural schematic diagram of a compact direct-acting water hammer relief valve.

Fig. 2 is a schematic diagram of the sleeve structure.

detailed description

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

See Figure 1 and Figure 2, the compact direct-acting water hammer relief valve, the valve body 1 adopts an angle type, or is designed as a straight-through type, and a valve seat 2 is provided between the inlet end 1.1 and the outlet end 1.2 of the valve body 1, A sleeve 3 is installed on the valve seat 2 through the flange hole in the valve body 1. The sleeve 3 is positioned through the valve cover and 8 installed on the flange in the valve body. The inlet end 1.1 and the outlet end 1.2 of the valve body 1 pass through the sleeve. The V-shaped flow hole 3.1 opened on the side wall near the end of the valve seat 2 on the cylinder 3 is in communication. The sleeve 3 is provided with an adjustment cylinder 4 that is sealed corresponding to the inlet end 1.1 of the valve body 1. The adjustment cylinder 4 is a A cylindrical member that communicates up and down. When the adjustment cylinder 4 moves up and down, it can connect or cut off the V-shaped flow hole 3.1 on the sleeve 3 to connect or cut off the inlet port 1.1 and the outlet port 1.2 of the valve body 1. The outer side of the valve cover 8 is installed Spring cover 10 is arranged, and piston cylinder 6, spring seat 11 are installed in spring cover 10, and the spring 7 that is installed between piston cylinder 6 and spring seat 11, one end of piston cylinder 6 cooperates with spring cover 10, and with spring cover There is a sealing ring 9 between the 10, and the other end passes through the valve cover 8 and enters the sleeve 3 on the side of the valve body 1, and is connected with the adjusting cylinder 4 through the bolt 5, and the adjusting cylinder 4, the piston cylinder 6 and the spring cover 10 are all in the valve body 1 on the same central axis of the cavity. The top of the spring cover 10 is provided with an adjusting bolt 12 , one end of the adjusting bolt 12 passing through the spring cover 10 contacts the spring seat 11 , and the other end with the nut exposes the spring cover 10 and is provided with a locking nut 13 . The side wall of the spring cover 10 is provided with a first through hole 10.2 near the end of the valve cover 8, and a cavity a is provided between the piston barrel 6 and the valve cover 8, and the cavity a passes through the first through hole 10.2 and the conduit 15. One end of the conduit 15 is provided with a one-way adjustable valve 16, the other end of the conduit 15 is connected to the oil cylinder 14, a cavity b is provided between the piston barrel 6 and the spring cover 10, and the side wall of the spring cover 10 is provided near the top. There is a second through hole 10.1, and the cavity b communicates with the atmosphere through the second through hole 10.2.

Referring to Fig. 1 and Fig. 2, the operating principle of the present utility model is:

First, set the thrust of the spring 7 by adjusting the bolt 12 according to the requirements of the working conditions, and lock it with the lock nut 13. When the thrust of the medium at the inlet end 1.1 of the valve body 1 acting on the piston cylinder 6 is less than the set value of the spring 7, the valve is off.

Valve opening: when the thrust force of the medium at the inlet end 1.1 of the valve body 1 on the piston cylinder 6 is greater than the set value of the spring 7, the medium pushes the piston cylinder 6 upward, the piston cylinder 6 compresses the spring 7, and the upper chamber b of the piston cylinder 6 The air inside is exhausted into the atmosphere through the second through hole 10.1, and the medium in the oil cylinder 14 quickly flows freely through the one-way adjustable valve 16 installed on the conduit 15, and is sucked into the cavity a through the first through hole 10.2. At the same time, the piston cylinder 6 drives the adjustment cylinder 4 upward through the bolt 5, and the adjustment cylinder 4 ascends and leaves the V-shaped flow hole 3.1 on the sleeve 3 to communicate with the inlet port 1.1 and the outlet port 1.2 of the valve body 1, the valve opens, and the medium passes through the sleeve. The V-shaped flow hole 3.1 on the cylinder 3 flows into the outlet port 1.2 to realize the discharge and pressure reduction.

Close the valve: when the pressure of the medium at the inlet end 1.1 of the valve body 1 decreases, and the thrust acting on the piston cylinder 6 is less than the setting value of the spring 7, the spring 7 pushes the piston cylinder 6 down, and the medium in the cavity a is released from the first A through hole 10.2 and a one-way controllable valve 16 mounted on the conduit 15 flow-limiting and controllable discharge back to the oil cylinder 14. At the same time, the piston cylinder 6 pushes the adjustment cylinder 4 downward, and the adjustment cylinder 4 descends to cut off the pressure on the sleeve 3. The V-shaped flow hole 3.1 cuts off the inlet port 1.1 and the outlet port 1.2 of the valve body 1, so as to realize the controllable closing speed of the valve.

To sum up, the regulating cylinder 4, the piston cylinder 6 and the spring cover 10 are all located on the same central axis of the middle chamber of the valve body 1, the piston cylinder 6 drives the regulating cylinder 4 to open and close, the piston cylinder 6 is equipped with a spring 7, and the spring The thrust of 7 is directly compared with the medium pressure through the piston cylinder 6. Once the pressure exceeds the set value of the spring, the piston cylinder 6 pushes the spring 7 to compress rapidly, and the piston cylinder 6 drives the adjustment cylinder 4 to move up the valve synchronously, and the valve moves quickly and sensitively. After the pressure relief is completed, the spring 7 pushes the piston cylinder 6 and the adjustment cylinder 4 downward, and the medium in the cavity a under the piston cylinder 6 flows back to the oil cylinder 14 slowly and controllably through the one-way adjustable valve 16 and the conduit 15 to realize the slow closing of the valve. , to prevent the water hammer from closing the valve itself. The utility model has the advantages of being able to adapt to large-diameter and high-pressure working conditions, compact structure, convenient installation, adjustable operating pressure, real-time and rapid opening when water hammer occurs, and stable, controllable and slow closing after pressure relief, which can ensure the pipe network The advantages of safe and efficient operation of the system.

Claims (6)

1. A compact direct-acting water hammer relief valve, comprising a valve body (1) and a valve cover (8), between the inlet end (1.1) and the outlet end (1.2) of the valve body (1) A valve seat (2) is provided, which is characterized in that: a sleeve (3) is installed on the valve seat (2) in the valve body (1), and the sleeve (3) passes through the The bonnet (8) is positioned, and the side wall of the sleeve (3) near the end of the valve seat (2) is provided with a passage connecting the inlet port (1.1) and the outlet port (1.2). Orifice, the sleeve (3) is provided with an adjustment cylinder (4) corresponding to the inlet end (1.1) of the valve body (1) that is sealed, and the adjustment cylinder (4) communicates when moving up and down Or cut off the flow hole to connect or cut off the inlet port (1.1) and outlet port (1.2), the outside of the valve cover (8) is equipped with a spring cover (10), spring cover (10) A piston cylinder (6), a spring seat (11), and a spring (7) installed between the piston cylinder (6) and the spring seat (11) are installed inside, and one end of the piston cylinder (6) Cooperate with the spring cover (10), and a sealing ring (9) is provided between the spring cover (10), and the other end passes through the valve cover (8) and enters the sleeve (3) on the side of the valve body (1), and is connected with the The adjustment cylinder (4) is connected by a bolt (5), the top of the spring cover (10) is provided with an adjustment bolt (12), and the adjustment bolt (12) passes through one end of the spring cover (10) and The spring seat (11) contacts, and the other end with the nut exposes the spring cover (10) and is provided with a locking nut (13). 2. The compact direct-acting water hammer relief valve according to claim 1, characterized in that: on the side wall of the spring cover (10) near the end of the valve cover (8) is provided a second A through hole (10.2), a cavity a is provided between the piston barrel (6) and the valve cover (8), and the cavity a passes through the first through hole (10.2) and the conduit (15 ), the conduit (15) is provided with a one-way adjustable valve (16), the other end of the conduit (15) is connected to the oil cylinder (14), the piston barrel (6) and the spring cover (10) There is a cavity b between them, and the side wall of the spring cover (10) is provided with a second through hole (10.1) near the top, and the cavity b communicates with the atmosphere through the second through hole (10.1). 3. The compact direct-acting water hammer relief valve according to claim 1 or 2, characterized in that: the flow hole is a V-shaped flow hole (3.1). 4. The compact direct-acting water hammer relief valve according to claim 1 or 2, characterized in that: the adjustment cylinder (4), the piston cylinder (6) and the spring cover (10) are all in the On the same central axis of the cavity of the valve body (1). 5. The compact direct-acting water hammer relief valve according to claim 1 or 2, characterized in that: the one-way adjustable valve (16) is installed in such a way that the medium in the oil cylinder (14) passes through the valve The direction of flowing to the cavity a is the free flow direction, and the direction of the medium in the cavity a flowing to the oil cylinder (14) through the valve is the flow-limiting and adjustable direction. 6. The compact direct-acting water hammer relief valve according to claim 1 or 2, characterized in that: the valve body (1) adopts an angle type, or is designed as a straight-through type.