CN203051812U - A leak-proof plunger valve - Google Patents

Abstract

The utility model discloses a valve, especially, prevent plunger valve of leakage, including valve body and valve gap, seted up the valve opening on the valve gap, sealing connection has the valve rod in the valve opening, and the one end that the valve rod stretches out the valve opening is connected with the operation hand wheel, and the other end of valve rod is equipped with the plunger, is equipped with inlet channel and liquid outlet channel in the valve body, and inlet channel and liquid outlet channel switch on through intercommunication passageway, and the intercommunication passageway lateral wall is seted up flutedly, inlays in the recess to be equipped with the sealing washer with plunger sealing connection, its characterized in that: the plunger is provided with an annular groove, an auxiliary sealing ring is embedded in the annular groove and is in interference fit with the plunger, and the auxiliary sealing ring is provided with a bevel cut. The utility model has the advantages of good sealing effect, long service life and leakage prevention.

Description

A leak-proof plunger valve

technical field

The utility model relates to a valve, in particular to a plunger valve with an anti-leakage function.

Background technique

The plunger valve is widely used because of its simple structure and good manufacturing process. Its working principle is to drive the valve stem to rotate by operating the handwheel, and then drive the plunger to rise and fall to open and close the valve. The plunger valve in the prior art includes a valve body, which is provided with a liquid inlet channel and a liquid outlet channel. The liquid inlet channel and the liquid outlet channel are connected through a communication channel. A valve stem is connected, and a plunger is fixedly connected to the lower end of the valve stem. A valve hole for the valve stem to pass through is opened on the valve cover. An annular groove is opened on the side wall of the valve hole, and an O-ring is arranged in the annular groove. The valve stem The O-ring seal is connected with the valve cover, the plunger is located in the communication channel, and a groove is opened on the side wall of the communication channel, and an O-ring is embedded in the groove, and the plunger communicates with the valve through the O-ring. Channel-tight connection. The disadvantage of the above-mentioned valve is that: when the O-ring is installed in the annular groove of the side wall of the above-mentioned valve hole or in the groove of the side wall of the communication channel, the O-ring is easily bitten; The liquid channel is located above the communication channel, while the liquid outlet channel is located below the communication channel. When the plunger rises and the communication channel leads to the liquid inlet channel and the liquid outlet channel, the fluid is poured into the communication channel from the liquid inlet channel. However, the high-speed scouring of the O-shaped sealing ring will easily cause the O-shaped sealing ring located on the side wall of the communication passage to fail, resulting in poor sealing effect of the plunger valve, leakage, and reduced service life.

Utility model content

In order to overcome the shortcomings of the prior art, the utility model provides a leak-proof plunger valve with good sealing effect and long service life.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a leak-proof plunger valve, including a valve body and a valve cover, a valve hole is opened on the valve cover, a valve stem is sealed and connected in the valve hole, and the valve stem extends One end of the outlet hole is connected with an operating handwheel, the other end of the valve stem is provided with a plunger, and the valve body is provided with an inlet channel and an outlet channel. The inlet channel and the outlet channel are connected through a communication channel, and the communication channel side The wall is provided with a groove, and a sealing ring is embedded in the groove, which is sealingly connected with the plunger. It is characterized in that: the plunger is provided with an annular groove, and an auxiliary sealing ring is embedded in the annular groove. The auxiliary sealing ring Interference fit with the plunger, and oblique cuts are made on the auxiliary sealing ring.

As a further configuration of the present invention, the auxiliary sealing ring is made of polyoxymethylene material.

As a further configuration of the present invention, the side wall of the annular groove is connected to the outer peripheral surface of the plunger through chamfering.

As a further configuration of the present invention, the number of chamfer angles is 45-60 degrees.

Adopting the above scheme, the utility model is equipped with an auxiliary sealing ring on the plunger. The auxiliary sealing ring is located above the O-shaped sealing ring, which can reduce the erosion of the fluid on the O-shaped sealing ring, prolong its service life, and further strengthen the valve. The sealing effect of the body; the oblique cut on the auxiliary sealing ring can increase the elastic deformation capacity of the auxiliary sealing ring; the side wall of the annular groove is connected with the outer peripheral surface of the plunger through chamfering, which can play a transitional role when installing the auxiliary sealing ring, which is convenient The auxiliary sealing ring is matched with the annular groove of the plunger; the auxiliary sealing ring made of polyoxymethylene material has high strength, erosion resistance, strong compression resistance and long service life.

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

Description of drawings

Accompanying drawing 1 is the structural representation of the specific embodiment of the utility model;

Accompanying drawing 2 is the partially enlarged view of the specific embodiment of the utility model.

Detailed ways

The specific embodiment of the utility model is shown in Figure 1-2 as a leak-proof plunger valve, which includes a valve body 1 and a valve cover 2. A valve hole is opened on the valve cover 2, and a valve stem 3 is sealed in the valve hole. One end of the rod 3 protruding from the valve hole is connected with an operating handwheel 4, the other end of the valve rod 3 is provided with a plunger 5, and the valve body 1 is provided with a liquid inlet channel 11 and a liquid outlet channel 12, and the liquid inlet channel 11 and the liquid outlet channel The channel 12 is conducted through the communication channel 13, and the side wall of the communication channel 13 is provided with a groove 131, and an O-ring 132 sealingly connected with the plunger 5 is embedded in the groove 131, and an annular groove 51 is provided on the plunger 5. An auxiliary sealing ring 52 is embedded in the annular groove 51, the auxiliary sealing ring 52 is in interference fit with the plunger 5, and an oblique cut is opened on the auxiliary sealing ring 52; the auxiliary sealing ring 52 is made of polyoxymethylene material; the above-mentioned annular groove 51 The side wall is connected to the outer peripheral surface of the plunger 5 through a chamfer 511 as shown in FIG. 2 , the angle of the chamfer 511 is 45-60 degrees, and in this embodiment it is 45 degrees.

Adopting the above scheme, the utility model is equipped with an auxiliary seal ring 52 on the plunger 5, and the auxiliary seal ring 52 is located above the O-ring seal 132, which can reduce the erosion of the fluid on the O-ring seal 132 and prolong its service life. At the same time, the sealing effect of the valve body 1 is further enhanced; the auxiliary sealing ring 52 is provided with oblique cuts to increase the elastic deformation capacity of the auxiliary sealing ring 52; The auxiliary sealing ring 52 plays a transitional role to facilitate the cooperation between the auxiliary sealing ring 52 and the annular groove 51 of the plunger 5; the auxiliary sealing ring 52 made of polyoxymethylene material has high strength, erosion resistance, strong pressure resistance and long service life.

Claims (4)

1. A leak-proof plunger valve, including a valve body and a bonnet, a valve hole is opened on the bonnet, a valve stem is sealed in the valve hole, and an operating handwheel is connected to the end of the valve stem protruding from the valve hole. The other end of the rod is provided with a plunger, and the valve body is provided with a liquid inlet channel and a liquid outlet channel. The liquid inlet channel and the liquid outlet channel are connected through a communication channel. The sealing ring sealingly connected with the plunger is characterized in that: the plunger is provided with an annular groove, and an auxiliary sealing ring is embedded in the annular groove, the auxiliary sealing ring is in interference fit with the plunger, and the auxiliary sealing ring There are oblique cuts on the top. 2. The leak-proof plunger valve according to claim 1, characterized in that: the auxiliary sealing ring is made of polyoxymethylene material. 3. The leak-proof plunger valve according to claim 1 or 2, characterized in that: the side wall of the annular groove is connected to the outer peripheral surface of the plunger through chamfering. 4. The anti-leakage plunger valve according to claim 3, characterized in that: the number of chamfered angles is 45-60 degrees.

Images