CN205423901U - Micro cavity hard seal wear-resistant gate valve - Google Patents

Abstract

This novel valve that belongs to especially relates to little lumen wear-resisting gate valve of hard seal. The utility model provides a little lumen wear-resisting gate valve sealed firmly, includes the valve body, sets up the cavity passageway that is used for the liquid or the gas of circulation on the valve body, sets up the disk seat on the valve body, and the disk seat is two, and symmetrical arrangement sets up the flashboard between two disk seats, and the position of flashboard just can realize the on-off control to the cavity passageway, sets up the valve gap on the valve body, and the valve gap passes through bolt fixed connection with the valve body. This is novel to have following advantage: the micro-middle cavity structure basically eliminates the suction particles of the middle cavity during the pressure fluctuation and temperature conversion in the operation process; the flashboard adopts a structure with two ends extending out, and the switching valve has no middle cavity suction and extrusion effects; the seat is continuously sealed to limit the particles from entering the central cavity during operation.

Description

Micro cavity hard seal wear-resistant gate valve

technical field

The utility model belongs to valves, in particular to a wear-resistant gate valve with a micro-medium cavity hard seal.

Background technique

With the development of industrialization, there are more and more solid-containing working conditions, such as polysilicon, coal gas, and coal oil, and the requirements for valves are getting higher and higher. The gate valve has the advantages of good economy under the condition of large diameter. The gate valve of this structure is a solution for high-solid working conditions accompanied by high temperature and high pressure.

If the ordinary gate valve is used in the working condition containing solid particles, the particles will enter the middle cavity along with the medium when the valve is working; even for gate valves with diversion holes, due to changes in temperature and pressure during the working process, the medium in the middle cavity will expand and cool down. , the particles are also actively sucked into the cavity. Once the particles enter the middle cavity, the accumulation and coking in the middle cavity will cause the valve to lose its function; some particles remaining on the sealing surface will damage the seal; at the same time, the particles will enter the packing and damage the seal, resulting in leakage.

Contents of the invention

The purpose of the new type is to provide a wear-resistant gate valve with a micro-medium cavity and a hard seal against the defects of the prior art.

In order to achieve the above purpose, this new model adopts the following technical scheme: a micro-medium cavity hard-sealed wear-resistant gate valve, including a valve body, a cavity channel for circulating liquid or gas is arranged on the valve body, and a valve seat is arranged on the valve body , the valve seat is two pieces, arranged symmetrically, and a gate is set between the two valve seats. Bolted connection.

The micro-cavity hard-seal wear-resistant gate valve as described above, wherein the valve body is provided with an installation process groove, and both the valve seat and the gate plate are arranged in the installation process groove.

A micro-cavity hard-sealed wear-resistant gate valve as described above, wherein the two ends of the gate are in the shape of an arc, and the installation process groove on the valve body matching the gate is also in the shape of an arc.

A micro-cavity hard-sealed wear-resistant gate valve as described above, wherein the upper and lower ends of the valve seat extend out of the cavity channel, and auxiliary seals are provided around the valve seat, and an auxiliary seal is provided between the valve seat and the valve body. Disc spring, the disc spring is used to compress the auxiliary seal.

The micro-medium cavity hard-seal wear-resistant gate valve as described above, wherein, a mid-flange gasket and packing are also provided between the valve cover and the valve body.

The micro-medium cavity hard-seal wear-resistant gate valve as described above, wherein a pressure sleeve is arranged above the valve cover.

The new type has the following advantages: the structure of the micro-medium chamber basically eliminates the suction particles in the middle chamber during the operation process of pressure fluctuations and temperature changes; Continuous sealing is adopted to restrict particles from entering the middle cavity during operation.

Description of drawings

Figure 1 Structural diagram of the micro-cavity hard-sealed wear-resistant gate valve;

Figure 2 Schematic diagram of the top view of the middle cavity of the micro-medium cavity hard-sealed wear-resistant gate valve;

Figure 3 Structural diagram of the seat of the micro-medium cavity hard-sealed wear-resistant gate valve.

In the figure: 1. Valve body, 2. Positive pressure protection tube, 3. Valve seat, 4. Auxiliary seal, 5. Disc spring, 6. Gate plate, 7. Middle flange gasket, 8. Packing, 9. Valve Cover, 10. Compression sleeve, 11. Hand assembly, 12. Installation process tank, 13. Sealing surface, 14. Valve seat filling part.

detailed description

As shown in Figures 1 to 3, a micro-cavity hard-sealed wear-resistant gate valve includes a valve body 1, a cavity channel for circulating liquid or gas is arranged on the valve body 1, and a valve seat is arranged on the valve body 1 3. The valve seat 3 is two pieces, symmetrically arranged. A gate 6 is set between the two valve seats 3. The position of the gate 6 is just enough to realize the opening and closing control of the cavity channel. A valve cover 9 is set on the valve body 1. , The valve cover 9 is fixedly connected with the valve body 1 by bolts.

An installation process groove 12 is opened on the valve body 1, and the valve seat 3 and the gate plate 6 are both arranged in the installation process groove 12.

Both ends of the gate 6 are arc-shaped, and the installation process groove 12 on the valve body 1 matching the gate 6 is also arc-shaped.

In order to ensure sealing, the upper and lower ends of the valve seat 3 extend out of the cavity channel, and auxiliary seals 4 are arranged around the valve seat 3, and a disc spring 5 is arranged between the valve seat 3 and the valve body 1. The disc spring 5 Used to compress the auxiliary seal 4.

Between the bonnet 9 and the valve body 1 there is also a middle flange gasket 7 and a packing 8 .

A pressure sleeve 10 is arranged above the valve cover 9 .

The feature of this new type is: the valve has a design of filling the middle cavity under the premise of ensuring a single valve body. The space formed by the valve body and the bonnet is filled with internal parts such as the valve seat and the gate plate. In this way, solid particles are restricted in the flow channel so that they cannot enter the middle cavity, so as to prolong the service life of the valve.

The micro-cavity hard-sealed wear-resistant gate valve is designed to restrict particles from entering the cavity during the entire use of the valve. The valve seat is continuously sealed to limit particles from entering the middle cavity during operation. When the valve is fully open to fully closed, the medium is only temporarily accumulated in the round hole of the gate plate. When the valve is fully closed to fully open, all The accumulated medium all enters the pipeline without residue; the micro-cavity structure is adopted to basically eliminate the pressure fluctuations and temperature changes during the operation process. There will be active suction and extrusion effects in the middle cavity; at the same time, the valve has a preventive positive pressure protection structure, and clean medium is injected into the middle cavity first when necessary.

Claims (6)

1. A micro-cavity hard-sealed wear-resistant gate valve is characterized in that: it includes a valve body (1), and the valve body (1) is provided with a cavity channel for circulating liquid or gas, and on the valve body (1) Set the valve seat (3), the valve seat (3) is two pieces, arranged symmetrically, the gate plate (6) is set between the two valve seats (3), the position of the gate plate (6) is just enough to realize the cavity channel For opening and closing control, a valve cover (9) is arranged on the valve body (1), and the valve cover (9) and the valve body (1) are fixedly connected by bolts. 2. A micro-medium cavity hard-sealed wear-resistant gate valve as claimed in claim 1, characterized in that: the valve body (1) is provided with an installation process groove (12), the valve seat (3) and the gate (6) They are all arranged in the installation process tank (12). 3. A micro-cavity hard-seal wear-resistant gate valve according to claim 2, characterized in that: the two ends of the gate (6) are in the shape of arcs, and the valve body (1) is connected to the gate (6). ) The matching installation process groove (12) is also an arc shape. 4. A micro-cavity hard-sealed wear-resistant gate valve as claimed in claim 3, characterized in that: the upper and lower ends of the valve seat (3) extend out of the cavity channel, and the four sides of the valve seat (3) are evenly spaced. An auxiliary seal (4) is provided, and a disc spring (5) is arranged between the valve seat (3) and the valve body (1), and the disc spring (5) is used to compress the auxiliary seal (4). 5. A micro-medium cavity hard-sealed wear-resistant gate valve as claimed in claim 4, characterized in that: a middle flange gasket (7) and a stuffing (8). 6. A micro-medium cavity hard-sealed wear-resistant gate valve according to claim 5, characterized in that: a pressure sleeve (10) is arranged above the valve cover (9).