CN211901609U - Durable anti-leakage stop valve - Google Patents

Abstract

The utility model discloses a durable leak-proof stop valve, protruding mouth inner wall is fixed with the trapezoidal piece, the top of valve body is fixed with the valve cap, the valve cap runs through there is inside hollow valve rod, the bottom of valve rod is fixed with protruding mouth assorted valve clack, the bottom of valve clack is fixed with the cylinder, be equipped with the piston in the cylinder, the bottom of piston is fixed with the screw thread post that runs through the cylinder, the bottom of screw thread post is fixed with the taper rubber buffer, the toper shrinkage pool has been seted up to the bottom of taper rubber buffer, the bottom is fixed with the toper post that inserts in the toper shrinkage pool in the bottom, the top of piston is fixed with the pivot that. This stop valve makes the pivot promote the taper rubber stopper to move down through revolving to twist the second handle for the toper post inserts in the toper concave hole of taper rubber stopper bottom, makes the expansion of taper rubber stopper, makes the taper rubber stopper plug up protruding mouth, thereby makes the stop valve can be by dual shutoff, improves sealed effect, effectively prevents that valve clack wearing and tearing from leading to the condition emergence that the leakproofness is not enough.

Description

Durable anti-leakage stop valve

Technical Field

The utility model relates to a stop valve technical field specifically is a durable leak-proof stop valve.

Background

The shut-off valve is also called a shut-off valve, and belongs to a forced sealing type valve, so when the valve is closed, pressure must be applied to the valve clack to force the sealing surface not to leak. When the medium enters the valve from the lower part of the valve clack, the resistance to be overcome by the operating force is the friction force between the valve rod and the packing and the thrust generated by the pressure of the medium, the force for closing the valve is larger than the force for opening the valve, so the diameter of the valve rod is larger, otherwise the failure of the valve rod buckling can occur. The connection mode is divided into three types: flange connection, screw thread connection and welding connection. After the self-sealing valve appears, the medium flow direction of the stop valve is changed to enter the valve cavity from the upper part of the valve clack, at this time, under the action of medium pressure, the force for closing the valve is small, the force for opening the valve is large, and the diameter of the valve rod can be correspondingly reduced. At the same time, this type of valve is also relatively tight under the action of the medium. The valve of China has been specified in the 'three-transformation and three-transformation' way, and the flow direction of the stop valve is uniformly from top to bottom. When the stop valve is opened, the opening height of the valve clack is 25% -30% of the nominal diameter, the flow reaches the maximum, and the valve reaches the full-open position. Therefore, the fully open position of the shut-off valve is determined by the stroke of the valve clack.

The existing stop valve is easy to wear between the valve clack and the valve body due to long-time use, so that the sealing effect of the valve clack is reduced, the sealing performance of the stop valve is influenced, and therefore the durable leakage-proof stop valve is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a durable leak-proof stop valve to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a durable leakage-proof stop valve comprises a valve body, wherein a valve cavity is arranged in the valve body, a water inlet connected with the valve cavity is arranged on one side of the valve body, a water outlet is formed in one side, away from the water inlet, of the valve body, a bottom cover is fixed at the bottom of the valve body, a water pipe communicated with the water outlet is arranged on one side of the bottom cover, a protruding nozzle communicated with the bottom cover is arranged at the bottom of the valve cavity, a trapezoidal block is fixed on the inner wall of the protruding nozzle, a valve cap is fixed at the top of the valve body, a hollow valve rod penetrates through the valve cap, a valve clack matched with the protruding nozzle is fixed at the bottom of the valve rod, a cylinder is fixed at the bottom of the valve clack, a piston is arranged in the cylinder, a threaded column penetrating through the cylinder is fixed at the bottom of, the bottom in the bottom cover is fixed with a conical column inserted into the conical concave hole, and the top of the piston is fixed with a rotating shaft penetrating through the valve rod.

Preferably, the outer side of the threaded column is provided with a first thread, and the threaded column is in threaded connection with the cylinder barrel through the first thread.

Preferably, the valve rod is provided with a second thread on the outer side thereof, and the valve rod is in threaded connection with the bonnet through the second thread.

Preferably, a first handle is fixed to the top of the valve stem, and a second handle is fixed to the top of the rotating shaft.

Preferably, the number of the trapezoidal blocks is five, and the trapezoidal blocks are uniformly distributed in the inner cavity of the convex mouth in an annular shape.

Compared with the prior art, the beneficial effects of the utility model are that: this stop valve makes the pivot promote the taper rubber stopper move down through revolving to twist the second handle for the toper post inserts in the toper concave hole of taper rubber stopper bottom, makes the expansion of taper rubber stopper, makes the taper rubber stopper plug up protruding mouth, thereby makes the stop valve can be by dual shutoff, improves sealed effect, effectively prevents that valve clack wearing and tearing from leading to the condition emergence that the leakproofness is not enough, improves the durability of stop valve.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the cylinder barrel structure of the present invention;

fig. 3 is a schematic view of the bottom structure of the present invention.

In the figure: 1-a valve body; 2-valve cavity; 3-a water inlet; 4-water outlet; 5-a raised mouth; 6-valve cap; 7-a valve stem; 8-a rotating shaft; 9-a piston; 10-a threaded post; 11-a cylinder barrel; 12-tapered rubber stopper; 13-a trapezoidal block; 14-a tapered column; 15-a water pipe; 16-a first thread; 17-a conical recess; 18-a valve flap; 19-a second thread; 20-a first handle; 21-a second handle; 22-bottom cover.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

Referring to fig. 1-3, the present invention provides a technical solution: a durable leakage-proof stop valve comprises a valve body 1, wherein a valve cavity 2 is arranged in the valve body 1, a water inlet 3 connected with the valve cavity 2 is arranged on one side of the valve body 1, a water outlet 4 is arranged on one side of the valve body 1 far away from the water inlet 3, a bottom cover 22 is fixed at the bottom of the valve body 1, a water pipe 15 communicated with the water outlet 4 is arranged on one side of the bottom cover 22, a raised nozzle 5 communicated with the bottom cover 22 is arranged at the bottom of the valve cavity 2, a trapezoidal block 13 is fixed on the inner wall of the raised nozzle 5, a valve cap 6 is fixed at the top of the valve body 1, a valve rod 7 with a hollow interior penetrates through the valve cap 6, a valve clack 18 matched with the raised nozzle 5 is fixed at the bottom of the valve clack 18, a cylinder 11 is fixed at the bottom of the valve clack 18, a piston 9 is arranged in the cylinder 11, a threaded column 10 penetrating through, the bottom of conical rubber buffer 12 has seted up the toper shrinkage pool 17, the bottom is fixed with the toper post 14 that inserts in the toper shrinkage pool 17 in the bottom 22, the top of piston 9 is fixed with the pivot 8 that runs through valve rod 7. This stop valve makes pivot 8 promote taper rubber stopper 12 and move down through revolving wrong second handle 21 for in taper post 14 inserts the taper shrinkage pool 17 of taper rubber stopper 12 bottom, make taper rubber stopper 12 expansion inflation, make taper rubber stopper 12 plug up protruding mouth 5, thereby make the stop valve can be by dual shutoff, improve sealed effect, effectively prevent that valve clack 18 wearing and tearing from leading to the not enough condition of leakproofness to take place.

The outer side of the threaded column 10 is provided with a first thread 16, and the threaded column 10 is in threaded connection with the cylinder barrel 11 through the first thread 16; so that the threaded cylinder 10 can be moved rotationally.

A second thread 19 is arranged on the outer side of the valve rod 7, and the valve rod 7 is in threaded connection with the valve cap 6 through the second thread 19; so that the valve stem 7 can be rotationally displaced.

A first handle 20 is fixed on the top of the valve rod 7, and a second handle 21 is fixed on the top of the rotating shaft 8; the control valve rod 7 and the rotating shaft 8 are convenient to rotate.

The number of the trapezoidal blocks 13 is five, and the trapezoidal blocks 13 are uniformly distributed in the inner cavity of the convex mouth 5 in an annular shape; the trapezoidal blocks 13 enable the tapered rubber stopper 12 to be uniformly pressed, and water flow can be circulated between the gaps of the adjacent trapezoidal blocks 13.

When the water valve is used, water enters the valve cavity 2 through the water inlet 3, then enters the bottom cover 22 through the raised nozzle 5, enters the water outlet 4 from the water pipe 15 and is discharged outwards. When the stop valve is opened, firstly, the first handle 20 is screwed, so that the first handle 20 drives the valve rod 7 to rotate, the valve rod 7 is screwed on the second thread 19 to move upwards, the valve clack 18 moves upwards to be separated from the convex mouth 5, then the second handle 21 is screwed to drive the rotating shaft 8 to rotate, so that the rotating shaft 8 drives the threaded column 10 to rotate, the first thread 16 moves upwards, so that the threaded column 10 drives the conical rubber plug 12 to move upwards, the conical rubber plug 12 can be extruded by the trapezoidal block 13, so that the conical rubber plug 12 shrinks in volume, so that the conical rubber plug 12 cannot block the convex mouth 5, and the stop valve is opened. When closing the stop valve, at first twist the first in command 20 for valve clack 18 plugs up protruding mouth 5, then twist second in command 21 and make pivot 8 promote conical rubber stopper 12 and move down, make in the toper shrinkage pool 17 of conical rubber stopper 12 bottom is inserted to tapered post 14, make conical rubber stopper 12 expand the inflation, make conical rubber stopper 12 plug up protruding mouth 5, thereby make the stop valve can be by dual shutoff, improve sealed effect, effectively prevent that valve clack 18 from wearing and tearing from leading to the not enough condition of leakproofness emergence. The first thread 16 and the second thread 19 have the same spiral direction, so that the valve rod 7 and the rotating shaft 8 can rotate smoothly without affecting the sealing performance.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a durable prevent leaking stop valve, includes the valve body, its characterized in that: a valve cavity is arranged in the valve body, a water inlet connected with the valve cavity is arranged at one side of the valve body, a water outlet is arranged at one side of the valve body away from the water inlet, a bottom cover is fixed at the bottom of the valve body, a water pipe communicated with the water outlet is arranged at one side of the bottom cover, a raised nozzle communicated with the bottom cover is arranged at the bottom of the valve cavity, a trapezoidal block is fixed on the inner wall of the raised nozzle, a valve cap is fixed at the top of the valve body, a hollow valve rod penetrates through the valve cap, a valve clack matched with the raised nozzle is fixed at the bottom of the valve rod, a cylinder barrel is fixed at the bottom of the valve clack, a piston is arranged in the cylinder barrel, a threaded column penetrating through the cylinder barrel is fixed at the bottom of the threaded column, a conical rubber plug is fixed at the bottom of the threaded column, and a rotating shaft penetrating through the valve rod is fixed at the top of the piston.

2. A durable leak-proof shut-off valve as defined in claim 1, wherein: the outer side of the threaded column is provided with first threads, and the threaded column is in threaded connection with the cylinder barrel through the first threads.

3. A durable leak-proof shut-off valve as defined in claim 1, wherein: the outside of valve rod is equipped with the second screw thread, the valve rod passes through second screw thread and valve cap threaded connection.

4. A durable leak-proof shut-off valve as defined in claim 1, wherein: a first handle is fixed to the top of the valve rod, and a second handle is fixed to the top of the rotating shaft.

5. A durable leak-proof shut-off valve as defined in claim 1, wherein: the number of the trapezoidal blocks is five, and the trapezoidal blocks are uniformly distributed in the inner cavity of the protruding nozzle in an annular mode.

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