CN204312754U - A kind of hard seal ball valve with elastic sealing structure - Google Patents

Abstract

The utility model relates to a hard-sealed ball valve with an elastic sealing structure, comprising a valve body, a ball, a side valve body, an upper valve shaft and a lower valve shaft, the ball is arranged in the valve body cavity of the valve body, and the The side valve body is fixed on the end surface of the valve body by bolts, the upper valve shaft and the lower valve shaft are respectively connected with the sphere, the side valve body is provided with a valve body groove, and the valve body groove is provided with An elastic sealing structure, the elastic sealing structure includes a valve body seat, a valve body seat fixing ring and a valve body seat elastic body, the valve body seat fixing ring is fixed inside the valve body groove, and the valve body seat is arranged on In the groove of the valve body seat fixing ring, and the elastic body of the valve body seat is clamped with the inner wall of the valve body seat fixing ring groove. The valve body seat fixing ring is provided with a fixing ring air hole, and the fixing ring air hole is set by The side valve body air hole at the back of the valve body groove communicates with an external pressure source. Compared with the prior art, the utility model has the advantages of convenient operation, reduced wear and the like.

Description

A hard-sealed ball valve with an elastic sealing structure

technical field

The utility model relates to a ball valve, in particular to a hard seal ball valve with an elastic sealing structure.

Background technique

Ball valve (ball valve should be a globe valve in the field of marine engineering and ships), defined in the standard GB/T21465-2008 "Valve Terminology" as: a valve whose opening and closing part (ball) is driven by the valve stem and rotates around the axis of the ball valve . It can also be used for the regulation and control of fluids, among which the hard-sealed V-shaped ball valve has a strong shear force between its V-shaped ball core and the metal valve seat of surfacing welding carbide, and is especially suitable for fibers and tiny solid particles. etc. medium. In fluid transportation, the ball valve is a valve with extremely small flow resistance, which is often used in the water inlet valve of the turbine and has a good energy-saving effect.

The invention patent with the Chinese patent number CN101614285B discloses a ball valve. The ball valve is provided with left and right auxiliary valve bodies that can slide left and right inside the valve body. The distance between the left and right auxiliary valve bodies is greater than that of the ball. Shaft diameter, by controlling the distance between the left and right sub-valve bodies, the switch operation of the ball valve is performed to reduce friction, and a seal is set on the valve seat, through which the ball and the valve seat are sealed, the structural part of the ball valve Many, complex operation, difficult maintenance.

Utility model content

The purpose of this utility model is to provide a hard seal ball valve with an elastic sealing structure which is easy to operate and reduces wear in order to overcome the above-mentioned defects in the prior art.

The purpose of this utility model can be achieved through the following technical solutions:

A hard-sealed ball valve with an elastic sealing structure, including a valve body, a ball, a side valve body, an upper valve shaft and a lower valve shaft, the ball is arranged in the valve body cavity of the valve body, and the side valve body passes through Bolts are fixed on the end face of the valve body, the upper valve shaft and the lower valve shaft are respectively connected with the ball, the side valve body is provided with a valve body groove, and the valve body groove is provided with an elastic sealing structure inside, The elastic sealing structure includes a valve body seat, a valve body seat fixing ring and a valve body seat elastic body, the valve body seat fixing ring is fixed inside the valve body groove, and the valve body seat is fixed on the valve body seat In the ring groove, and through the elastic body of the valve body seat and the inner wall of the groove of the valve body seat fixing ring, the valve body seat fixing ring is provided with a fixing ring air hole, and the fixing ring air hole is arranged in the valve body groove The air hole of the side valve body at the back communicates with the external pressure source.

The cross-section of the valve body seat fixing ring is U-shaped, its outer wall is close to the inner wall of the valve body groove, and is fixed on the inner wall of the valve body groove by bolts, and the valve body seat is arranged in the groove of the valve body seat fixing ring , and the elastic body of the valve body seat is clamped with the inner wall of the groove of the valve body seat fixing ring.

A back cavity of the valve body seat is formed between the valve body seat and the groove of the fixing ring of the valve body seat, and the back cavity communicates with an external pressure source through the air hole of the fixing ring and the air hole of the side valve body.

The sphere is provided with a sphere seat, and the sphere seat is fixed on the sphere by bolts, and its outer surface is provided with an inclined sealing surface of the sphere seat.

The inner surface of the valve body seat is also provided with a valve body seat sealing surface, and the ball seat sealing surface is set opposite to the valve body seat sealing surface.

The top of the valve body is provided with a pressure relief hole connecting the cavity of the valve body and the outside of the valve body.

The upper valve shaft and the lower valve shaft respectively pass through copper sleeves on the valve body axial channel and are connected to the ball.

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

1. Easy to operate. The ball valve controls the contact surface between the ball and the valve body through the opening and closing of the air hole on the elastic sealing structure. When the ball valve moves, the contact surface between the ball and the valve body is separated, thereby reducing the operating torque and facilitating the switch.

2. Reduce wear and tear. When the ball valve operates, the contact surface between the ball and the valve body is in a state of separation, not direct contact, so wear is reduced and the service life is prolonged.

Description of drawings

Fig. 1 is the front view of the utility model.

Fig. 2 is the A-A sectional view of the utility model.

Fig. 3 is a B-B sectional view of the utility model.

Fig. 4 is a partially enlarged view of part C of the utility model.

Fig. 5 is a partially enlarged view of part D of the present invention.

Fig. 6 is a schematic diagram of a partial structure of the utility model in a fully closed state.

Fig. 7 is a schematic diagram of a partial structure of the utility model in a fully opened state.

Among them: 1. Valve body, 2. Ball, 3. Side valve body, 4. Upper valve shaft, 5. Lower valve shaft, 6. Elastic sealing structure, 7. External pressure source of ball valve, 11. Copper sleeve, 12. Vent Pressure hole, 21, ball seat, 211, ball seat sealing surface, 31, valve body groove, 32, side valve body air hole, 61, valve body seat, 62, valve body seat fixing ring, 63, valve body seat elastic body, 611, the back cavity of the valve body seat, 612, the sealing surface of the valve body seat, 621, the fixed ring air hole.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example:

As shown in Figures 1-5, a hard-sealed ball valve with an elastic sealing structure includes a valve body 1, a ball 2, a side valve body 3, an upper valve shaft 4 and a lower valve shaft 5, and the ball 2 is arranged on the valve body 1, the side valve body 3 is fixed on the end face of the valve body 1 by bolts, the upper valve shaft 4 and the lower valve shaft 5 are respectively connected with the ball 2, and the side valve body 3 is provided with a valve body groove 31, and the valve body The inside of the groove 31 is provided with an elastic sealing structure 6. The elastic sealing structure 6 includes a valve body seat 61, a valve body seat fixing ring 62 and a valve body seat elastic body 63. The valve body seat fixing ring 62 is fixed inside the valve body groove 31, and the valve body The seat 61 is arranged in the groove of the valve body seat fixing ring 62, and is clamped by the valve body seat elastic body 63 and the inner wall of the valve body seat fixing ring 62 groove. The valve body seat fixing ring 62 is provided with a fixing ring air hole 621, The fixing ring air hole 621 communicates with the external pressure source 7 through the side valve body air hole 32 arranged at the back of the valve body groove 31 .

The section of the valve body seat fixing ring 62 is U-shaped, and its outer wall is close to the inner wall of the valve body groove 31, and is fixed on the inner wall of the valve body groove 31 by bolts. The valve body seat 61 is arranged in the groove of the valve body seat fixing ring 62. And the elastic body 63 of the valve body seat is clamped with the inner wall of the groove of the valve body seat fixing ring 62 .

A valve body seat back cavity 611 is formed between the valve body seat 61 and the groove of the valve body seat fixing ring 62 , and the back cavity 611 communicates with the external pressure source 7 through the fixing ring air hole 621 and the side valve body air hole 32 .

A ball seat 21 is arranged on the ball 2, and the ball seat 21 is fixed on the ball 2 by bolts, and an inclined ball seat sealing surface 211 is provided on the outer surface thereof.

The inner surface of the valve body seat 61 is also provided with a valve body seat sealing surface 612 , and the ball seat sealing surface 211 is opposite to the valve body seat sealing surface 612 .

The top of the valve body 1 is provided with a pressure relief hole 12 connecting the valve body cavity and the outside of the valve body.

The upper valve shaft 4 and the lower valve shaft 5 respectively pass through the copper sleeve 11 on the axial path of the valve body 1 and are connected with the ball 2 .

As shown in Figure 4, when the valve is initially assembled and the ball valve is in the closed position, the ball seat sealing surface 211 and the valve body seat sealing surface 612 are arranged opposite to each other, and there is a gap between the ball seat sealing surface 211 and the valve body seat sealing surface 612 .

As shown in Figure 6, when a sufficiently large external pressure source 7 of the ball valve passes through the side valve body air hole 32 on the side valve body 3 and the fixing ring air hole 621 on the bottom surface of the valve body seat fixing ring 62

Entering the back cavity 611 of the valve body seat 61, because the valve body seat elastic body 63 has elasticity and tightness, the pressure pushes the valve body seat 61 to move toward the ball seat 21 until the contact forms a seal. In order to ensure sealing, the pressure in the valve body cavity is discharged through the pressure relief hole 12 on the valve body 1 at the same time. The external pressure source 7 of the ball valve can be an independent external pressure source, or can be taken from the internal pressure of the pipeline.

As shown in Figure 7, before the valve is opened and closed, the external pressure source 7 of the ball valve is removed, and the pressure in the back cavity 611 of the valve body seat is released through the fixed ring air hole 621 and the side valve body air hole 32, and the valve body seat, 61 Under the action of the internal pressure of the valve and the resilient force of the valve body seat elastic body 63, the ball seat 21 is separated, and the ball seat sealing surface 211 is separated from the valve body seat sealing surface 612, greatly reducing the valve opening torque and valve seat wear during the valve opening process.

The utility model proposes a hard-sealed ball valve with an elastic sealing structure. The elastic sealing structure can expand and contract according to a certain setting program, reduce the operating torque of the valve, and make online maintenance possible. The valve of this hard-sealed ball valve The seat can also move three-dimensionally within a certain range, and can automatically center to reduce leakage and wear.

Claims (7)

1. the hard seal ball valve with elastic sealing structure, comprise valve body (1), spheroid (2), side valve body (3), upper valve shaft (4) and lower valve shaft (5), described spheroid (2) is arranged in the valve body chamber of valve body (1), described side valve body (3) is bolted on the end face of valve body (1), described upper valve shaft (4) is connected with spheroid (2) respectively with lower valve shaft (5), it is characterized in that, described side valve body (3) is provided with valve body groove (31), described valve body groove (31) inside is provided with elastic sealing structure (6), described elastic sealing structure (6) comprises valve block (61), valve block retaining ring (62) and valve block elastomer (63), it is inner that described valve block retaining ring (62) is fixed on valve body groove (31), described valve block (61) is arranged in valve block retaining ring (62) groove, and clamped by valve block elastomer (63) and valve block retaining ring (62) groove madial wall, described valve block retaining ring (62) is provided with retaining ring pore (621), this retaining ring pore (621) is communicated with external pressure source (7) by the side valve body pore (32) being arranged on valve body groove (31) back.

2. a kind of hard seal ball valve with elastic sealing structure according to claim 1, it is characterized in that, described valve block retaining ring (62) cross section is U-shaped, its outer wall and valve body groove (31) inwall are adjacent to, and be bolted on valve body groove (31) inwall, described valve block (61) is arranged in valve block retaining ring (62) groove, and is clamped by valve block elastomer (63) and valve block retaining ring (62) groove madial wall.

3. a kind of hard seal ball valve with elastic sealing structure according to claim 2, it is characterized in that, form valve block back cavity (611) between described valve block (61) and valve block retaining ring (62) groove, described back cavity (611) is communicated with external pressure source (7) with side valve body pore (32) by retaining ring pore (621).

4. a kind of hard seal ball valve with elastic sealing structure according to claim 1, it is characterized in that, described spheroid (2) is provided with ball seat (21), described ball seat (21) is bolted on spheroid (2), and its outer side surface is provided with the ball seat sealing surface (211) of inclination.

5. a kind of hard seal ball valve with elastic sealing structure according to claim 4, it is characterized in that, the inner side surface of described valve block (61) is also provided with valve block sealing surface (612), and described ball seat sealing surface (211) and valve block sealing surface (612) are oppositely arranged.

6. a kind of hard seal ball valve with elastic sealing structure according to claim 1, is characterized in that, described valve body (1) top is provided with the relief hole (12) of connecting valve body cavity and valve body outside.

7. a kind of hard seal ball valve with elastic sealing structure according to claim 1, it is characterized in that, the copper sheathing (11) that described upper valve shaft (4) and lower valve shaft (5) are each passed through on valve body (1) axle track is connected with spheroid (2).