CN203757025U - Waterproof hammer gate valve - Google Patents

Abstract

A waterproof hammer gate valve consists of a valve body, a gate plate, a valve rod, a valve cover, a piston and a spring. The gate plate is provided with a channel, and the channel divides the piston into an inner cavity and an outer cavity. The piston is arranged at the protruding position where the inner cavity and the outer cavity are connected and provided with a small damping hole. When the gate plate is opened, a medium flows into a medium inlet and shunted in a pipeline, a part of the medium flows to an outer cavity mouth through a pipeline port, medium pressure in the outer cavity pushes the piston to move upward, the spring in the inner cavity is extruded and accordingly pushes the piston reversely to enable water flow pressure to be reduced. When the medium pushes the piston, a part of the medium flows into the inner cavity through the small damping hole of the piston, and when the inner cavity is full of the medium, the medium in the inner cavity is extruded to flow from the small damping hole to the outer cavity and then flows out of a medium outlet after flowing through the outer cavity. The waterproof hammer gate valve has the advantages of being capable of reducing or avoiding water hammer water impact and meanwhile being simple in structure and convenient to maintain.

Description

Anti-hammer gate valve

technical field

The utility model relates to a gate valve, in particular to a hammer-proof gate valve.

Background technique

Water hammer means that inside the water pipe, the inner wall of the pipe is smooth and the water flows freely. When the open valve is suddenly closed, the water flow will generate a pressure on the valve and the pipe wall. Due to the smooth pipe wall, the subsequent water flow will make the pressure reach the maximum under the action of inertia. , and produce destructive effects, according to the direction of the force, it can be divided into positive water hammer and negative water hammer. Water hammer is very harmful to the pipeline. Economic losses.

Utility model content

The purpose of the utility model is to provide a hammer-proof gate valve. The utility model can reduce or avoid the generation of water hammer and water hammer, and at the same time, the structure is simple and the maintenance is relatively convenient.

The technical scheme that the utility model relates to:

Anti-hammer gate valve consists of valve body, gate plate, valve stem, valve cover, piston and spring.

The top end of the valve body is fixedly connected with the valve cover through bolts. The valve cover is provided with a threaded through hole, and the threaded through hole is matched with the thread of the valve stem, and the valve stem is rotated by rotating the handle, so that the valve stem can move up and down.

There is a cylindrical groove on the top of the gate, and a cylindrical protrusion on the bottom of the valve stem, which can be embedded in the groove, and the valve stem can drive the gate to move when it moves up and down.

A passage is opened in the gate, and the passage is divided into an inner chamber and an outer chamber by the piston. The piston is placed on the protrusion connecting the inner cavity and the outer cavity, and a small damping hole is opened on the piston; one end of the spring is in close contact with the inner cavity wall, and the other end is in close contact with the piston, and the inner cavity wall is in contact with the piston. The protrusion secures the spring so that it does not deflect.

A pipe opening is opened at the bottom of the gate close to the medium inlet, and the medium can flow in from the medium inlet and flow into the outer cavity through the pipe opening.

The utility model has the advantages of reducing or avoiding water hammer, simple structure and convenient maintenance.

Description of drawings

Fig. 1 is a schematic diagram of a full-section structure of the utility model.

Among them: 1. Valve body, 2. Gate, 3. Valve stem, 4. Bonnet, 5. Inner chamber, 6. Outer chamber, 7. Piston, 8. Damping hole, 9. Spring, 10. Pipe port , 11. Media import, 12. Media export.

Detailed ways

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

The utility model as shown in Figure 1, the waterproof hammer gate valve is made up of valve body 1, gate plate 2, valve stem 3, valve cover 4, piston 7 and spring 9.

The top end of the valve body 1 is fixedly connected with the valve cover 4 by bolts. The valve cover 4 is provided with a threaded through hole, and the threaded through hole is matched with the thread of the valve stem 3, and the valve stem 3 is rotated by rotating the handle, so that the valve stem 3 can move up and down.

The top of the gate 2 has a cylindrical groove, and the bottom of the valve stem 3 is provided with a cylindrical protrusion, which can be embedded in the groove, and the valve stem 3 can drive the gate 2 to move when it moves up and down.

There is a passage in the gate 2, and the passage is divided into an inner cavity 5 and an outer cavity 6 by the piston 7. The piston 7 is placed on the protrusion where the inner cavity 5 and the outer cavity 6 are connected, and a small damping hole 8 is opened on the piston 7; Paste, the cavity wall and the piston 7 have protrusions to fix the spring 9, so that the spring 9 does not deviate.

There is a pipeline opening 10 on the side of the bottom of the shutter 2 close to the medium inlet 11, and the medium can flow in from the medium inlet 11, and flow into the outer chamber 6 through the pipeline opening 10.

When the gate 2 is opened, the medium flows in from the medium inlet 11, and the flow is divided in the pipeline. Part of the medium flows through the pipeline port 10 to the outer chamber 6. The medium pressure in the outer chamber 6 pushes the piston 7 to move upward, and the spring 9 in the inner chamber The piston 7 is pushed back by extrusion to slow down the pressure of the water flow; when the medium pushes the piston 7, part of the medium flows into the inner cavity 5 from the damping hole 8 on the piston 7, and when the inner cavity 5 is filled with the medium, the medium in the inner cavity 5 Squeezed to flow from the small damping hole 8 to the outer cavity 6, the medium flows out of the medium outlet 12 after passing through the outer cavity 6, so that the pressure of the medium is slowed down, thereby slowing down or avoiding water hammer.

Claims (1)

1. The anti-hammer gate valve is composed of a valve body (1), a gate (2), a valve stem (3), a valve cover (4), a piston (7) and a spring (9), and it is characterized in that: the gate (2) There is a channel inside, and the channel is divided into an inner cavity (5) and an outer cavity (6) by a piston (7). At the beginning, a small damping hole (8) is opened on the piston (7), one end of the spring (9) is in close contact with the wall of the inner cavity (5), and the other end is in close contact with the piston (7), and the gate (2) There is a pipeline opening (10) on the side of the bottom end by the medium inlet (11).