CN205504035U - Telescoping valve elastic compensation seals internals structure - Google Patents

Abstract

The utility model relates to a sleeve valve elastic compensation sealing internal part structure, which is characterized in that it includes a metal sealing ring, a valve seat, a valve core and a sleeve; the metal sealing ring is circular, and the inner edge of the metal sealing ring A C-shaped ring is provided; an arc-shaped groove is provided on the sealing surface of the valve seat, and the metal sealing ring is placed on the end surface of the valve seat and fixed with a sleeve. Sealing contact, the C-ring of the metal sealing ring is placed in the arc-shaped groove correspondingly, and the outer surface of the C-ring is in sealing contact with the bottom surface of the arc-shaped groove; The edge of the inner hole at the lower end of the sleeve is provided with a sleeve tapered surface, and the tapered surface of the valve core and the tapered surface of the sleeve are respectively sealed and matched with the C-shaped ring of the metal sealing ring. The utility model has a simple and ingenious structure, can compensate the sealing between the sleeve valve core and the valve seat, and has the advantages of low processing cost, high sealing level, convenient maintenance and the like.

Description

Sleeve valve elastic compensation seal inner part structure

technical field

The utility model relates to a novel sleeve valve sealing structure, in particular to a sleeve valve elastic compensation sealing internal part structure, which belongs to the technical field of regulating valves.

Background technique

With the development of the economy, the level of industrial automation control is constantly improving, so the requirements for the reliability of valves in process control are also continuously improved, and higher requirements are also put forward for the sealing performance of valves. At present, in chemical industry, iron and steel, metallurgy, petroleum, electric power and other industries, sleeve valves are widely used in various occasions because of their advantages such as being very suitable for high pressure differential conditions, high dynamic stability, and small demand for actuator thrust. widely used. The internal structure of the traditional sleeve valve is composed of a valve core, a valve stem, and a sleeve with an adjustment window. There are two sealing surfaces on the valve core and the sleeve at the same time. When the valve is closed, the two sealing surfaces must be sealed at the same time. valve to close. This structure has extremely high requirements for the matching of the relative dimensions of the two sealing surfaces of the valve core and the sleeve in the height direction, which makes it difficult for the sleeve valve with this internal structure to achieve a high leakage level. Leakage levels III and IV can be achieved, but leakage levels V and above are difficult to achieve.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies in the prior art, and provide a sleeve valve elastic compensation seal inner part structure, which is simple and ingenious in structure, can compensate the seal between the sleeve valve core and the valve seat, and has low processing cost. Low pressure, high sealing level, easy maintenance and so on.

According to the technical solution provided by the utility model: the sleeve valve elastically compensates and seals the internal part structure, which is characterized in that it includes a metal sealing ring, a valve seat, a valve core and a sleeve; the metal sealing ring is circular, and the metal sealing ring There is a C-shaped ring on the inner edge of the valve seat; an arc-shaped groove is provided on the sealing surface of the valve seat, and the metal sealing ring is placed on the end surface of the valve seat and fixed with a sleeve. The end surface of the valve seat is in sealing contact, and the C-ring of the metal sealing ring is placed in the arc-shaped groove correspondingly, and the outer surface of the C-ring is in sealing contact with the bottom surface of the arc-shaped groove; the outer periphery of the lower end of the valve core is provided with an inclined cone surface , the edge of the inner hole at the lower end of the sleeve is provided with a sleeve tapered surface, and the valve core tapered surface and the sleeve tapered surface are respectively sealed with the C-shaped ring of the metal sealing ring.

As a further improvement of the utility model, a coil spring is installed in the C-shaped ring of the metal sealing ring.

As a further improvement of the utility model, the angle of the inclined cone surface of the valve core is 30-60°, and the angle of the inclined cone surface of the sleeve is 30-60°.

As a further improvement of the utility model, the angles of the inclined cone surface of the valve core and the inclined cone surface of the sleeve are both 45°.

Compared with the prior art, the utility model has the following advantages:

1. The metal sealing ring itself in the utility model can compensate and seal within a certain compression range, which overcomes the high requirement that the two metal sealing surfaces of the traditional sleeve valve core and the sleeve must be sealed at the same time, and reduces the processing difficulty. Reduced processing costs.

2. The utility model utilizes the elastic compensation function of the metal sealing ring to ensure the sealing performance of the two sealing surfaces of the valve core well, and can easily reach the leakage level of level IV, even level V and above.

3. Under high temperature conditions (>290°C), the structure of the metal valve trim will expand linearly due to the influence of high temperature, and the relative height of the bimetallic seal of the traditional sleeve valve will change, resulting in a decrease in the leakage level of the valve. However, the elasticity of the utility model The metal sealing ring in the internal structure of the compensation seal has an elastic compensation function, and can still maintain good sealing performance even under high temperature conditions.

4. The spool or sleeve is a vulnerable part of the valve, especially the sealing surface is very easy to damage and must be repaired or replaced frequently. After using the elastic compensation sealing inner part structure of the utility model, the valve can be realized by replacing the metal sealing ring. Overhaul, low on-site maintenance cost, good interchangeability, faster operation.

Description of drawings

Fig. 1 is a schematic diagram of the installation and application structure of the utility model.

Fig. 2 is an enlarged view of part A in Fig. 1 .

detailed description

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

As shown in Figure 1 and Figure 2: the sleeve valve elastic compensation sealing internal part structure in the embodiment is mainly composed of a metal sealing ring 1, a valve seat 2, a valve core 3 and a sleeve 4; the metal sealing ring 1 is a circle Ring, the inner edge of the metal sealing ring 1 is provided with a C-shaped ring 1a; the sealing surface of the valve seat 2 is provided with an arc-shaped groove 2a, and the metal sealing ring 1 is placed on the end surface of the valve seat 2 and covered with a sleeve The cylinder 4 is pressed and fixed, the flat part of the metal seal ring 1 is in sealing contact with the end face of the valve seat 2, the C-shaped ring 1a of the metal seal ring 1 is placed in the arc-shaped groove 2a correspondingly, and the outer surface of the C-shaped ring 1a is in contact with the arc-shaped groove. The bottom surface of the groove 2a is in sealing contact; the outer periphery of the lower end of the valve core 3 is provided with a spool tapered surface 3a, and the edge of the inner hole at the lower end of the sleeve 4 is provided with a sleeve tapered surface 4a, and the spool tapered surface 3a and The inclined cone surface 4a of the sleeve is in sealing fit with the C-shaped ring 1a of the metal sealing ring 1 respectively, and the angles between the inclined cone surface 3a of the valve core and the inclined cone surface 4a of the sleeve are both 45°.

As shown in FIG. 1 , in this embodiment, a coil spring 5 is installed in the C-ring 1 a of the metal sealing ring 1 . The coil spring 5 can enhance the elastic compensation capability of the C-shaped ring 1a of the metal sealing ring 1a.

Working principle and working process of the present utility model are as follows:

As shown in Figure 1, the valve core 3 of the sleeve 4 valve has two sealing surfaces at different heights. When the valve is closed, there are two seals between the valve core 3 and the sleeve 4, valve seat 2 and metal sealing ring 1: one There is a hard seal formed by the upper sealing surface of the valve core 3 and the upper sealing surface of the sleeve 4. After sealing here, the inclined cone surface 3a of the valve core 3 at the lower end of the valve core presses the metal sealing ring 1 to form another seal. The elastic seal, because the metal seal ring 1 itself has a certain elasticity, can compensate for the seal within a certain compression range, effectively avoiding poor sealing performance due to processing errors.

In addition, after the valve is used for a long time, the sealing surface will inevitably be worn or corroded, and because the metal sealing ring 1 itself has elasticity, and the C-shaped ring 1a of the metal sealing ring 1 is equipped with a coil spring 5, so that the metal sealing ring 1. Within a certain range, the worn or corroded sealing surface of the valve core 3 can be effectively compensated to avoid or reduce valve leakage and prolong the service life of the valve.

Claims (4)

1. Sleeve valve elastic compensation sealing inner part structure, characterized in that it includes metal sealing ring (1), valve seat (2), valve core (3) and sleeve (4); the metal sealing ring (1) It is circular, and the inner edge of the metal sealing ring (1) is provided with a C-shaped ring (1a); the sealing surface of the valve seat (2) is provided with an arc-shaped groove (2a), and the metal sealing ring ( 1) Place it on the end face of the valve seat (2) and fix it with the sleeve (4). The flat part of the metal sealing ring (1) is in sealing contact with the end face of the valve seat (2). The C-shaped part of the metal sealing ring (1) The ring (1a) is correspondingly placed in the arc-shaped groove (2a), and the outer surface of the C-shaped ring (1a) is in sealing contact with the bottom surface of the arc-shaped groove (2a); the outer periphery of the lower end of the valve core (3) is provided with a valve core The inclined cone surface (3a), the inner hole edge of the lower end of the sleeve (4) is provided with a sleeve inclined cone surface (4a), the valve core inclined cone surface (3a) and the sleeve inclined cone surface (4a) are respectively connected with The C-ring (1a) of the metal seal ring (1) is tightly fitted. 2. The sleeve valve elastic compensation sealing inner part structure according to claim 1, characterized in that: the C-shaped ring (1a) of the metal sealing ring (1) is equipped with a coil spring (5). 3. The sleeve valve elastic compensation sealing inner part structure according to claim 1, characterized in that: the angle of the inclined cone surface (3a) of the valve core is 30~60°, and the angle of the inclined cone surface (4a) of the sleeve valve is ) angle is 30~60°. 4. The sleeve valve elastically compensated sealing inner part structure according to claim 1, characterized in that: the angles between the valve core inclined cone surface (3a) and the sleeve inclined cone surface (4a) are both 45°.