WO2014094593A1

WO2014094593A1 - Eccentric hemisphere valve

Info

Publication number: WO2014094593A1
Application number: PCT/CN2013/089658
Authority: WO
Inventors: 李习洪; 易考文
Original assignee: 武汉大禹阀门股份有限公司
Priority date: 2012-12-19
Filing date: 2013-12-17
Publication date: 2014-06-26

Abstract

Disclosed is an eccentric hemisphere valve, comprising a valve body (1), wherein a valve seat (2) and spherical crown (3) which are mutually matched are arranged in the valve body (1), a clamping ring (5) is arranged between the valve seat (2) and the valve body (1) in axial direction, the clamping ring (5) is arranged between the valve seat (2) and the valve body (1) in the axial direction by means of mutually matching of a screw (6) and an elastic gasket (7), an axial clearance (9) exists among the clamping ring (5), the valve seat (2) and the valve body (1), at least one ring groove (4) is formed on a radial sealing cylindrical surface of the valve body (1) or the valve seat (2), a seal ring (11) is sheathed in the ring groove (4), a plurality of set screws (10) are arranged on the clamping ring (5) along the axial direction, the top end surfaces of the set screws (10) bear against the end surface of the valve body (1). The structure of the present invention reduces technical requirements on assembly staff, shortens an assembling period, greatly improves the production efficiency, and enables the maintenance to be more convenient and faster.

Description

Eccentric hemisphere

Technical field

The invention belongs to the technical field of wide doors, and particularly relates to an eccentric hemisphere. Background technique

At present, most of the eccentric hemispherical wide seat and wide body seals are sealed by axial end faces. As shown in FIG. 1 and FIG. 2, a wide seat 12 and a ball crown 13 are provided in the wide body 11, and a groove 14 is formed on the end surface of the wide body 11 sealed with the wide seat 12, in the gutter The inner set of 14 has a 0-shaped 圏 18, which is an axial end face sealing structure. When the wide door is closed, the sealing surface of the wide seat 12 is one of the components of the wide door sealing pair, and is sealed with the sealing surface of the spherical cap 13 while the axial sealing surface is maintained and widened by the axial end face sealing structure. 11 seals. Due to the amount of compression of the axial end face seal 0-shaped 圏18, depending on the size chain formed by the design compression amount and the relevant part-related size, that is, the actual compression amount is the sum of the cumulative error of the design compression amount and the related size of each related part, and thus the change The range is very large, and a large number of wide seats can not guarantee the sealing of the wide door seal pair at the same time of assembly. At the same time, the compression ratio of the axial end face seal 0-shaped jaw is within a reasonable range, and the two seals collide. Therefore, when assembling, generally when the wide-slot axial sealing surface is in contact with the 0-shaped ( (0-shaped 圏 without compression deformation), the wide seat is allocated according to the actual clearance of the sealing pair.

Therefore, the axial end face sealing structure is used between the wide seat and the wide body. The problems are as follows: When assembling the wide seat, it is necessary to ensure that the sealing seat of the wide seat 12 and the spherical crown 13 can be sealed, and the wide seat is ensured. 12 is in contact with the axial end face 0-shaped 圏 18 and compresses the 0-shaped 圏 18, and the compression ratio of the 0-shaped 圏 18 must also be within a reasonable range. Therefore, the wide seat needs to be matched, there is no interchangeability, the wide door assembly cycle is long, the efficiency is low, and the quality of the assembly personnel is high; it is not suitable for mass production and maintenance is difficult.

As shown in Fig. 1, the eccentric hemisphere is further provided with a compression cymbal 15 between the wide seat 12 and the wide body 11. For the installation of the compression cymbal 15, the mutual cooperation of the hexagon socket head cap screw 16 and the elastic pad cymbal 17 is generally used. Install it. When the wide seat 12 and the pressure clamp 15 are installed, the spherical cap 13 is in the closed position, the screw 16 is screwed in, the pressure clamp 15 is tightened, and the pressure clamp 15 presses the wide seat 12 against the spherical crown 13 until the wide seat 12 and the spherical crown The sealing pair of 13 obtains the required pre-pressure, that is, stops tightening the screw, and at this time, the elastic pad 17 elastically deforms under the action of the pressing force of the screw 16, but is not necessarily flattened, and the pressure is 15 and wide. There is an axial gap 19 between the seat 12 and the wide body 11; when the wide door is opened, the spherical crown 13 is separated from the wide seat 12, and the wide seat 12 and the compression block 15 lose the pressing reaction force of the spherical crown 13 and lose balance, due to the pressure圏15, wide seat 12 and wide body There are axial gaps in the 11th, so at this time, under the elastic force of the elastic pad 17, the wide seat 12 and the pressure ring 15 move toward the bottom end of the wide seat hole, at which time the elastic pad deformation is reduced, or the original shape is restored. The screw 16 is loosened by the loss of the spring pad locking force. When the wide door is closed again, the wide seat 12 and the pressure block 14 are retracted under the push of the crown 13 to impact and compress the elastic pad 17 which transmits this force to the screw 16. After repeatedly opening and closing the wide door, the screw 16 is loosely rotated due to the alternating axial impact load, and the pressure 圏 15 position is gradually retreated, so that the sealing pressure of the sealing surface of the wide seat 12 and the spherical crown 13 is gradually reduced. Until the seal is lost. Therefore, after using the wide door of this kind of structure for a period of time, it often appears to be closed and repaired. In most cases, the service personnel only need to remove the wide door from the pipeline and retighten the compression screw to eliminate the malfunction. However, such frequent failures cause great trouble for the production and use of customers. Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to provide an eccentric hemispherical width having a wide-body and wide-seat radial sealing structure to solve the problems in the above background art.

As shown in FIG. 3, FIG. 4 and FIG. 5, the technical solution of the present invention is: an eccentric hemisphere, which comprises a wide body 1, and a wide seat 1 and a spherical crown 3 are arranged in the wide body 1. Between the wide seat 2 and the wide body 1 axial direction is provided a pressure 圏 5, and the pressure 圏 5 is installed between the wide seat and the wide body axial direction by the mutual cooperation of the screw 6 and the elastic bolster 7 , the pressure 圏5. An axial gap exists between the wide seat 2 and the wide body 1, and is characterized in that: at least one groove is formed in the radial sealing cylindrical surface of the wide body 1 and the wide seat 2, and the groove is The sleeve has a sealing jaw 11; a plurality of hexagon socket head cap screws 6 and set screws 10 are further arranged in the axial direction on the pressure ring 5, and the top end surface of the set screw 10 is placed on the end surface of the wide body 1.

In the above scenario:

The gutter is disposed on the wide seat 2 or the wide body 1, and the corner of the wide body 1 is transitioned by chamfering.

The set screws 10 are evenly distributed on the press 5, and the set screws 10 are arranged offset from the screws 6.

In the present invention, the gutter is opened in the radial sealing cylindrical surface of the wide body 1 or the wide seat 2, and the sealing jaw 11 is set in the gutter. In this sealing structure, the amount of compression of the sealing jaw depends only on the three processing dimensions, namely: the inner diameter of the wide-body hole in which the wide seat is installed, the bottom diameter of the gutter and the cross-sectional diameter of the sealing jaw; or the bottom of the gutter The diameter, the outer diameter of the wide seat and the cross-sectional diameter of the sealing jaw make it easier to ensure that the compression ratio of the sealing jaw is within a reasonable range. During assembly, the sealing jaw 11 is inserted into the groove, and the valve seat 2 is pressed into the seat hole to ensure the sealing between the valve seat 2 and the valve body 1.这种Using this radial sealing structure, the seals of the wide seat 2 and the wide body 1, the wide seat 2 and the spherical crown 3 are independent and independent Sudden.

In the present invention, when the pressing force 2 is tightened by the screw 6, and the required pre-tightening force is obtained between the sealing surface of the wide seat 2 and the spherical cap 3, the set screws 10 are screwed one by one; when the top ends of all the set screws are just right After pressing against the bottom end of the wide body pressure stop, continue to tighten all the hexagon socket head cap screws 6 until the elastic pad 7 is flattened. At this time, the elastic force of the elastic pad eliminates the thread gap between the screw and the screw hole and is locked. At this time, the compression joint 5 and the wide body 1 are rigidly coupled, and the relative positions between them are not changed by the opening and closing of the wide door.

Compared with the original structure, the invention has almost no change, and can solve the problems in the background art without increasing the cost, and can reduce the technical requirements of the assembler, shorten the assembly cycle, greatly improve the production efficiency, and repair more. Convenient. DRAWINGS

Figure 1 is a partial cross-sectional view of an eccentric hemisphere in the prior art;

Figure 2 is an enlarged view of A in Figure 1;

Figure 3 is a partial cross-sectional view of the eccentric hemisphere of the present invention;

Figure 4 is an enlarged view of B in Figure 3;

Figure 5 is an enlarged view of a portion C in Figure 3. detailed description

The present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 1 and FIG. 2, the eccentric hemispherical sealing structure in the prior art has been described in the background art, and details are not described herein.

As shown in FIG. 3 and FIG. 4, an eccentric hemisphere is wide, which comprises a wide body 1 , and a wide seat 1 and a spherical crown 3 are provided in the wide body 1 , and the wide seat 2 is sealed with the wide body 1 . One or more gutters 4 are formed on the radial sealing cylindrical surface, and the gutter 4 is provided with a sealing jaw 11 . This is a radial sealing structure in which the amount of compression of the sealing jaw 11 depends only on three processing dimensions, namely: the bottom diameter of the gutter 4, the outer diameter of the wide seat 2, and the sealing jaw 11 The cross-sectional diameter, therefore, makes it easier to ensure that the compression ratio of the sealing jaw 11 is within a reasonable range. During assembly, the sealing jaw 11 is inserted into the groove 4, and the wide seat 2 is pressed into the seat hole to ensure the sealing between the wide seat 2 and the wide body 1, and The sealing of the wide seat 2 and the wide body 1, the wide seat 2 and the spherical crown 3 can be independent and do not conflict with each other, so that the axial end face sealing structure between the wide seat 2 and the wide body 1 in the background art can be solved. The problem.

The corners of the wide body 1 or the wide seat 2 are chamfered by a certain angle and height. Otherwise, the sealing jaw 11 will be cut and the sealing ability will be lost.

As shown in FIG. 3 and FIG. 5, a pressure ring 5 is arranged between the wide seat 2 and the wide body 1 axial direction, and the pressure ring 5 is mounted on the wide seat 2 and the wide body 1 axis by the mutual cooperation of the screw 6 and the elastic pad 7 Between the two, the pressure gap 5, the wide seat 2 and the wide body 1 have an axial gap 9, and a plurality of set screws 10 are arranged along the axial direction on the pressure ring 5, and the set screws 10 are evenly distributed in the pressure 5, the set screw 10 and the screw 6 are arranged in a dislocation, and the top end surface of the set screw 10 is placed on the end surface of the wide body 1.

When the pressing force 5 is tightened by the screw 6, and the required pre-tightening force is obtained between the sealing faces of the wide seat 2 and the spherical cap 3, the set screws 10 are screwed one by one, when the top ends of all the set screws 10 are just placed against the wide After pressing the bottom end face of the body 1 , continue to tighten all the screws 6 until the elastic pad 7 is flattened. At this time, the elastic force of the elastic pad 7 eliminates the thread gap between the screw 6 and the screw hole, and is locked, and the pressure ring 5 is coupled with the wide body 1 into a rigid body. After the wide door is opened, the wide seat 2 is loosened due to the crushing reaction force of the spherical crown 3, but the pressure ring 5 is not loosened by the influence thereof, and the screw 6 is loosely rotated due to the opening and closing operation of the wide door. , the pressure is 5 back, and the wide door is not closed.

Claims

claims

1. An eccentric hemispherical cup, which includes a wide body (1). The wide body (1) is provided with a matching wide base (2) and a spherical crown (3). The wide base (2) and the wide body (1) There is a pressure ring (5) between the axial directions. The pressure ring (5) is installed on the wide seat (2) and the wide body (1) in the axial direction through the mutual cooperation of the screw (6) and the elastic washer (7). There is an axial gap (9) between the pressure ring (5), the wide seat (2) and the wide body (1), which is characterized in that: between the wide body (1) or the wide seat

There is at least one ring groove (4) on the radial sealing cylindrical surface of (2), and a sealing ring (11) is set in the ring groove (4); there are also multiple sealing rings (11) on the pressure ring (5) along the axial direction. A set screw (10), the top surface of the set screw (10) bears against the end surface of the wide body (1).

2. The eccentric hemispherical cup according to claim 1, characterized in that: the groove (4) is provided on the cup seat (2), or can also be provided on the cup body (1), and the cup body The corners of (1) or wide seats (2) are transitioned by chamfering.

3. The eccentric hemisphere according to claim 1, characterized in that: the set screws (10) are evenly distributed on the pressure ring (5), and the set screws (10) and the screws (6) are arranged in a staggered manner.