CN203500643U

CN203500643U - Gate valve capable of preventing water hammers

Info

Publication number: CN203500643U
Application number: CN201320661114.1U
Authority: CN
Inventors: 宋荣
Original assignee: Wenzhou Polytechnic
Current assignee: Wenzhou Polytechnic
Priority date: 2013-10-18
Filing date: 2013-10-18
Publication date: 2014-03-26
Anticipated expiration: 2023-10-18

Abstract

Anti-hammer gate valve consists of valve body, gate plate, valve stem and bonnet. An upright S-shaped channel is opened at the bottom of the gate, and both ends of the upright S-shaped channel are horizontal. When the gate is closed, the inlet of the vertical S-shaped channel is close to the inner wall of the valve, and the vertical S-shaped channel is in a closed state. When the gate is half-opened, the vertical S-shaped channel on the gate is in an open state, and the medium flows from The medium inlet flows in, flows through the vertical S-shaped channel on the gate, and flows out from the medium outlet to slow down the water flow pressure and avoid the water hammer phenomenon. When the gate is fully open, the outlet of the vertical S-shaped channel and the valve body The wall is tight, and the upright S channel is closed. The utility model has the advantages of simple structure, good water hammer effect, and prevents water hammer from causing damage to pipelines and valve bodies.

Description

Water hammer-resistant gate valve

Technical field

The utility model relates to gate valve, is specifically related to a kind of water hammer-resistant gate valve.

Background technique

When valve is opened suddenly or closes, produce very large current, cause water hammer, because tube wall is smooth, under the impact of fluid inertia, because waterpower reaches rapidly maximum, pipeline and valve body are suffered damage.

Model utility content

The purpose of this utility model is to provide a kind of water hammer-resistant gate valve, and the utility model is simple in structure, and water hammer-resistant is effective, prevents that water hammer from causing damage to pipeline and valve body.

The technological scheme that the utility model relates to:

Water hammer-resistant gate valve, is comprised of valve body, flashboard, valve rod and valve gap.

Described valve body top and valve gap are bolted to connection, and surface of contact is provided with seal washer, and described valve gap has tapped through hole, and tapped through hole matches with threaded stem, by rotatable handle, valve rod are rotated, thereby valve rod can be moved up and down.

Described flashboard top has a cylinder shape groove, and valve rod bottom is provided with a cylindrical bump, and projection can be embedded in groove, when valve rod moves up and down, can drive ram movement.

Described flashboard bottom has a upright S type passage, upright S type passage both ends horizontal.

When flashboard cuts out, the import of upright S type passage is close to mutually with valve interior wall, and upright S type passage is in closed condition; When flashboard is semi-open, upright S type passage is in open mode, and medium flows into from medium import, on the flashboard of flowing through, after upright S type passage, from media outlet, flows out, and slows down water flow pressure, avoids water hammer; When flashboard is during in full-gear, the outlet of upright S type passage is close to mutually with valve interior wall, and upright S passage is closed condition.

The utility model has the advantages that: simple in structure, water hammer-resistant is effective, prevent that water hammer from causing damage to pipeline and valve body.

Accompanying drawing explanation

Fig. 1 is complete section structural representation of the present utility model.

Wherein: 1. valve body, 2. medium import, 3. upright S type passage, 4. flashboard, 5. valve rod, 6. valve gap, 7. bolt, 8. seal washer, 9. media outlet.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

As shown in Figure 1, water hammer-resistant gate valve is comprised of valve body 1, flashboard 4, valve rod 5 and valve gap 6 the utility model.

Described valve body 1 top is fixedly connected with by bolt 7 with valve gap 6, and surface of contact is provided with seal washer 8, and described valve gap 6 has tapped through hole, and tapped through hole matches with valve rod 5 screw threads, makes valve rod 5 rotations, thereby valve rod 5 can be moved up and down by rotatable handle.

Described flashboard 4 tops have a cylinder shape groove, and described valve rod 5 bottoms are provided with a cylindrical bump, and projection can be embedded in groove, can drive flashboard 4 motions when valve rod 5 moves up and down.

Described flashboard 4 tops have a upright S type passage 3, upright S type passage 3 both ends horizontal.

In the utility model, when flashboard 4 is during in closed condition, import and valve body 1 inwall of upright S type passage 3 are close to, and upright S type passage 3 is in closed condition; The port that medium concentrates on medium import 2 forms partial high pressure, when driving flashboard 4, valve rod 5 up moves, when flashboard 4 is semi-open, upright S type passage 3 on flashboard 4 is in open mode, during vertical passage in the excessively upright S type passage 3 of MEDIA FLOW, due to gravitational direction and hydrodynamic pressure opposite direction, balance out a part of hydrodynamic pressure, make pressure decreased, from media outlet 9, flow out, reach the effect of water hammer-resistant, by shunting, slow down the impact that current produce, played the effect of protection pipeline and valve; When flashboard 4 is during in full-gear, outlet and valve body 1 inwall of upright S type passage 3 are close to, and upright S passage 3 is closed condition.

Claims

1. The anti-hammer gate valve consists of a valve body (1), a gate (4), a valve stem (5) and a bonnet (6), and is characterized in that: the top of the valve body (1) and the bonnet (6) Fixedly connected by bolts (7), the bonnet (6) has a threaded through hole, the threaded through hole is matched with the thread of the valve stem (5), and the top of the gate (4) has a cylindrical groove, The bottom end of the valve stem (5) is provided with a cylindrical protrusion, which can be embedded in the groove, and the bottom end of the gate (4) is provided with an upright S-shaped channel (3).