CN210859864U

CN210859864U - Forced sealing gate valve capable of flushing and removing siltation

Info

Publication number: CN210859864U
Application number: CN201921238519.8U
Authority: CN
Inventors: 曲祥雯; 宋戈
Original assignee: Shandong University of Science and Technology
Current assignee: Shandong University of Science and Technology
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-06-26
Anticipated expiration: 2029-07-31

Abstract

The utility model discloses a can wash away forced seal formula gate valve of cleaing away siltation comprises disk seat, wedge flashboard, lifter and hand wheel, is equipped with the wedge recess in the disk seat, and the wedge flashboard wedge recess bottom of impressing realizes forcing seal, and its characterized in that is equipped with the desilting hole of draining in the recess bottom position of disk seat, and the desilting downthehole wall of draining is equipped with the internal thread and screws up the hand and twist the cock. When the valve needs to be closed, the hand-screwing cock is firstly unscrewed, the hand wheel is screwed again to lower the flashboard to close the valve, the water drainage dredging hole is flushed under the action of water pressure, deposited and deposited impurities at the bottom of the groove are automatically flushed and cleaned, the flashboard is not blocked until the flashboard enters the bottom of the groove to achieve complete sealing, and the problem that the gate valve is not closed tightly is thoroughly solved.

Description

Forced sealing gate valve capable of flushing and removing siltation

Technical Field

The utility model relates to a gate valve especially relates to forced seal formula gate valve.

Background

The gate valve cannot be opened in the liquid conveying pipeline. A general gate valve is composed of a valve seat, a gate plate, a lifting rod (valve rod) and a hand wheel. The gate plate has two sealing modes, namely a self-sealing type structure, wherein the sealing surface of the gate plate is pressed to the valve seat on the other side by medium pressure to ensure the sealing; and the other is a forced sealing type, wherein sealing surfaces are formed on the front and the back of the wedge-shaped flashboard, a wedge-shaped groove is arranged in the valve seat, and the flashboard is pressed to the bottom of the groove of the valve seat by external force to carry out forced sealing. Most gate valves are positively sealed. It is to such a positive seal gate valve that is relevant to the present application. The forced sealing type gate valve has the defects that rust slag deposits and deposits frequently at the bottom of the groove of the valve seat, and when the valve needs to be closed, the wedge-shaped gate plate cannot enter the bottom of the groove, so that gaps are formed on the front face and the rear face of the wedge-shaped gate plate, the wedge-shaped gate plate cannot be closed tightly, water flow cannot be completely stopped, and the water interception effect cannot be achieved. Particularly, when the water needs to be completely cut off in emergency, people are in need of emergency. To date there has been no good solution.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects of the prior forced sealing gate valve and designing a forced sealing gate valve which can wash away siltation.

The utility model provides a can wash and clear away forced sealed gate valve of siltation, comprises disk seat, wedge flashboard, lifter and hand wheel, is equipped with the wedge recess in the disk seat, and the wedge flashboard is impressed wedge recess bottom and is realized forcing seal, its characterized in that is equipped with the desilting hole of draining in the recess bottom position of disk seat, and the desilting hole of draining is equipped with the internal thread, screws up the hand through the internal thread and screws up the cock. Or the water discharge dredging hole extends to form a protruding water discharge nozzle on the bottom surface of the valve seat, the water discharge dredging nozzle is provided with an internal thread, a side hole is formed in one side of the water discharge dredging nozzle, the hand screwing cock is screwed up through the internal thread, and the length of the hand screwing cock is required to be used for plugging the side hole.

The utility model discloses an application method and positive effect are, when the valve is closed to needs, at first unscrew the hand and twist the cock, twist the hand wheel again and transfer the flashboard, and the flashboard stops rivers gradually in transferring, and the water natural pressure boost in the pipeline will turn on the water under the water pressure effect and the desilting hole is washed out, carries out the automatic washing and washs to the sediment siltation debris of recess bottom, no longer blocks the flashboard, and it is sealed completely to reach until the flashboard gets into the recess bottom. If water flow indicates that the water is not flushed, the gravity center lifts the gate plate for several times until the gate plate is completely sealed. If the deposited sundries are hardened and the washing is not moved, the sundries are poked by an iron wire. Therefore, the utility model discloses thoroughly solved the gate valve and closed not tight problem.

Drawings

FIG. 1 is a front view of the first embodiment; fig. 2 is a front view of the second embodiment.

The attached figure illustrates 1-hand wheel, 2-lifting rod, 3-valve seat, 4-wedge gate, 5-wedge groove, 6-hand screw cock, 7-water discharge dredging hole, 8-water discharge nozzle, and 9-side hole.

Detailed Description

Example one

As shown in fig. 1, a forced sealing gate valve capable of flushing and removing siltation is composed of a valve seat 3, a wedge-shaped gate plate 4, a lifting rod 2 and a hand wheel 1, wherein a wedge-shaped groove 5 is arranged in the valve seat 3, and the wedge-shaped gate plate 4 is pressed into the bottom of the wedge-shaped groove 5 to realize forced sealing; wherein the bottom of the wedge-shaped groove 5 of the valve seat is provided with a water discharging dredging hole 7, the inner wall of the water discharging dredging hole 7 is provided with internal threads, and a hand screwing cock 6 is screwed on.

Example two

As shown in fig. 2, the forced sealing gate valve capable of flushing and removing siltation is composed of a valve seat 3, a wedge-shaped gate plate 4, a lifting rod 2 and a hand wheel 1, wherein a wedge-shaped groove 5 is arranged in the valve seat 3, and the wedge-shaped gate plate 4 is pressed into the bottom of the wedge-shaped groove 5 to realize forced sealing; wherein 5 bottom positions in the wedge recess of disk seat are equipped with the desilting hole of draining, and the desilting hole of draining extends for outstanding water discharge nozzle 8 in 3 bottoms surfaces of disk seat, and water discharge nozzle 8 one side is equipped with side opening 9, and water discharge nozzle 8 is equipped with the internal thread and screws up hand and twist cock 6, and the length of hand twisting cock 6 should satisfy and plug up side opening 9.

Claims

1. The utility model provides a can wash away forced seal formula gate valve of cleaing away siltation, by the disk seat, the wedge flashboard, lifter and hand wheel are constituteed, be equipped with the wedge recess in the disk seat, the wedge flashboard is impressed wedge recess bottom and is realized forcing sealedly, a serial communication port, be equipped with the desilting hole of draining in the recess bottom position of disk seat, the desilting hole of draining extends to the outstanding mouth that drains, it is equipped with the side opening to drain one side of the mouth, the mouth inner wall that drains is equipped with the internal thread, it twists the cock to twist the hand through the internal thread, the length that the cock was.