CN217874297U

CN217874297U - Self-sealing track ball valve

Info

Publication number: CN217874297U
Application number: CN202222285164.6U
Authority: CN
Inventors: 金安涛; 陈凡娥; 杨韩; 罗银银; 彭艳刚
Original assignee: Zhejiang Yinke Valve Co ltd
Current assignee: Zhejiang Yinke Valve Co ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-11-22
Anticipated expiration: 2032-08-29

Abstract

The utility model discloses a self-sealing track ball valve, which comprises a valve body, a valve cover, a ball body and a valve rod, wherein the ball body is arranged in an inner cavity of the valve body, the valve cover is arranged at the upper end of the valve body, the valve rod is arranged on the valve cover in a penetrating way, the inner end of the valve rod is connected with the ball body in a linkage way, an actuator is arranged above the valve cover, the output end of the actuator is connected with the outer end of the valve rod in a linkage way, and a valve seat is also arranged in the valve body; the inner wall of the valve body is provided with a thread groove, the valve seat is in threaded connection with the thread groove, the valve seat is provided with an inner sealing ring which is used for forming sealing fit with the ball body, the inner wall of the valve body is further provided with a sliding groove along the circumferential direction, the periphery of the valve seat is provided with a compression flange matched with the sliding groove, an outer sealing ring is arranged between the periphery of the valve seat and the inner wall of the valve body in a clamping mode, the inner end of the outer sealing ring is abutted to the outer end face of the compression flange, and the outer end of the outer sealing ring is abutted to the end face of the sliding groove. The utility model discloses the change operation when the later stage disk seat of being convenient for damages to guarantee the normal use of ball valve.

Description

Self-sealing track ball valve

Technical Field

The utility model relates to the technical field of valves, especially, relate to a self sealss track ball valve.

Background

The track ball valve is a ball valve with a special structure, and can realize the rotary opening and closing of a valve core, the switch has no friction, and forced sealing can be realized. The method is more and more widely applied to the chemical field, particularly under the working conditions of quick cutting and high and low temperature alternation, such as: the device comprises a natural gas molecular sieve dehydration device, a hydrogenation device, a natural gas metering station, an alternating temperature track ball valve for an inlet and an outlet of a low-temperature cold box of a large-scale ethylene device, a molecular sieve track ball valve and the like.

The working principle of the existing track ball valve is as follows: the valve rod moves up or down under the action of the hand wheel, the guide groove on the valve rod is contacted with the guide pin, and the valve rod performs ninety-degree rotary motion after performing linear motion for one section. During linear motion, the wedge-shaped surface at the lower end of the valve rod pushes the ball body to be close to the valve seat to realize sealing, or the ball body is separated from the valve seat to open the valve; then under the action of the guide groove and the guide pin, the valve rod drives the ball body to rotate 90 degrees. The opening and closing process of the valve is realized through the ascending and descending motion of the valve rod. Although spheroid and disk seat do not have the friction with the disk seat when rotatory, but because spheroid and disk seat sealing mode belong to hard seal, can lead to the fact the damage to the disk seat sealing face at alternating temperature and frequent in-process of opening and close unavoidably, thereby cause sealed not tight, leak in the valve takes place, this moment, just need to change the disk seat, good sealing performance when guaranteeing the valve and closing, but, the disk seat among the current self sealss track ball valve adopts welding or installs on the valve body inner wall through interference fit's mode mostly, this mounting means is firm reliable, but the maintenance operation in later stage of being not convenient for very much, the degree of difficulty of disk seat change operation has been increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a self sealss track ball valve, the utility model discloses change operation when the later stage disk seat of being convenient for damages to guarantee the normal use of ball valve.

In order to achieve the above object, the utility model provides a following technical scheme: the self-sealing track ball valve comprises a valve body, a valve cover, a ball body and a valve rod, wherein the ball body is arranged in an inner cavity of the valve body, the valve cover is arranged at the upper end of the valve body, the valve rod penetrates through the valve cover, the inner end of the valve rod is in linkage connection with the ball body, an actuator is arranged above the valve cover, the output end of the actuator is in linkage connection with the outer end of the valve rod, and a valve seat is further arranged in the valve body; the improved ball valve is characterized in that a threaded groove is formed in the inner wall of the valve body, the valve seat is in threaded connection with the threaded groove, an inner sealing ring which is used for forming sealing fit with a ball body is mounted on the valve seat, a sliding groove is formed in the inner wall of the valve body along the circumferential direction, a compression flange matched with the sliding groove is arranged on the periphery of the valve seat, an outer sealing ring is clamped between the periphery of the valve seat and the inner wall of the valve body, the inner end of the outer sealing ring abuts against the outer end face of the compression flange, and the outer end of the outer sealing ring abuts against the end face of the sliding groove.

Through adopting above-mentioned technical scheme, the disk seat passes through threaded connection's mode and installs in the valve body, the dismouting is very convenient, do benefit to the maintenance operation in equipment and the later stage in earlier stage, in order to guarantee the normal use of ball valve, and simultaneously, the pressing flange of disk seat compresses tightly the outer seal ring in the inner of the spout of valve body inner wall, the disk seat is revolved and is got tighter, the outer seal ring just is big more towards the deformation of two directions in inner periphery and periphery, realize effective sealing between disk seat and the valve body inner wall from this, prevent the emergence of leakage.

The utility model discloses further set up to, be provided with the annular mounting groove along circumference on the disk seat, the internal seal circle part inlays to be established in the annular mounting groove.

Through adopting above-mentioned technical scheme, realized the removable operation of interior sealing washer, practiced thrift the maintenance cost.

The utility model discloses further set up to, the inner and the outer end of external seal circle are the toper shape that the width reduces gradually.

By adopting the technical scheme, the contact area of the inner periphery of the outer sealing ring and the outer periphery of the valve seat and the cross-sectional area of the outer periphery of the outer sealing ring and the inner wall of the valve body are reduced, so that the extrusion stress of the outer periphery of the valve seat and the inner wall of the valve body when the outer sealing ring is deformed under pressure is improved, and the sealing performance between the outer periphery of the valve seat and the inner wall of the valve body is further improved.

The utility model discloses further set up to, it is equipped with the packing ring to press from both sides between flange and the outer seal ring.

Through adopting above-mentioned technical scheme, the packing ring can play the effect of protection external seal circle and disk seat.

The utility model discloses further set up to, install the lock ring through locking screw on the valve body inner wall, be provided with the seal groove along circumference on a terminal surface that lock ring and valve body inner wall laminated mutually, it is used for constituting sealed complex O shape circle with the valve body inner wall to inlay in the seal groove to be equipped with, thread groove and spout are all seted up on the lock ring.

Through adopting above-mentioned technical scheme, the lock ring is removable, avoids the thread groove directly to set up and leads to later stage screw thread to damage the problem that is difficult to maintain on the valve body inner wall, when the screw thread damages promptly only need with change the lock ring can, made things convenient for maintenance operation, simultaneously greatly reduced the maintenance cost.

The utility model discloses further set up to, be provided with positioning groove along circumference on the valve body inner wall, be equipped with on the lock ring with positioning groove matched with location flange.

Through adopting above-mentioned technical scheme, can fix a position the lock ring before the lock ring installation, the installation operation of the lock ring of being convenient for.

The utility model discloses further set up to, the lock ring from interior to exterior opens coaxial big circular slot and the little round hole of being provided with, seted up on the valve body inner wall with the corresponding little screw hole in little round hole, the screw section of locking screw runs through little round hole and screw in among the little screw, the screw head embedding of locking screw in the big circular slot and offset with the terminal surface in the big circular slot.

Through adopting above-mentioned technical scheme, can realize being connected between lock ring and the valve body, and connection structure is simple reliable, and easy dismounting does benefit to the equipment of earlier stage and the maintenance operation in later stage.

Drawings

Fig. 1 is a schematic overall structure diagram of the present invention;

fig. 2 is an enlarged schematic view of a portion a in fig. 1.

In the figure: 1. a valve body; 2. a valve cover; 3. a sphere; 4. a valve stem; 5. an actuator; 6. a valve seat; 7. a thread groove; 8. an inner seal ring; 9. a chute; 10. a compression flange; 11. an outer sealing ring; 12. an annular mounting groove; 13. a gasket; 14. locking screws; 15. a support ring; 16. a sealing groove; 17. an O-shaped ring; 18. a positioning groove; 19. a positioning flange; 20. a large circular groove; 21. a small circular hole; 22. a small screw hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example (b): the self-sealing track ball valve shown in fig. 1 and fig. 2 comprises a valve body 1, a valve cover 2, a ball body 3 and a valve rod 4, wherein the ball body 3 is arranged in an inner cavity of the valve body 1, the valve cover 2 is arranged at the upper end of the valve body 1, the valve rod 4 is arranged on the valve cover 2 in a penetrating manner, the inner end of the valve rod 4 is in linkage connection with the ball body 3, an actuator 5 is arranged above the valve cover 2, the actuator 5 is a pneumatic actuator, the pneumatic actuator is an existing mature device, detailed description of the specific structure of the pneumatic actuator is omitted, the output end of the actuator 5 is in linkage connection with the outer end of the valve rod 4, and a valve seat 6 is further arranged in the valve body 1; the inner wall of the valve body 1 is provided with a thread groove 7, the valve seat 6 is in threaded connection with the thread groove 7, the valve seat 6 is provided with an inner sealing ring 8 which is used for forming a sealing fit with the ball body 3, the inner wall of the valve body 1 is further provided with a sliding groove 9 along the circumferential direction, the sliding groove 9 and the thread groove 7 are coaxially arranged, the diameter of the sliding groove 9 is larger than that of the thread groove 7, the periphery of the valve seat 6 is provided with a pressing flange 10 matched with the sliding groove 9, the pressing flange 10 and the valve seat 6 are of an integrated structure, an outer sealing ring 11 is clamped between the periphery of the valve seat 6 and the inner wall of the valve body 1, the inner end of the outer sealing ring 11 abuts against the outer end face of the pressing flange 10, and the outer end face of the outer sealing ring 11 abuts against the end face of the sliding groove 9. The mode that disk seat 6 passes through threaded connection is installed in valve body 1, the dismouting is very convenient, do benefit to the equipment in earlier stage and the maintenance operation in later stage, in order to guarantee the normal use of ball valve, and simultaneously, the flange 10 that compresses tightly outer seal ring 11 in the inner of the spout 9 of 1 inner wall of valve body, disk seat 6 revolves and gets tighter, the deformation of outer seal ring 11 towards two directions of inner periphery and periphery is just bigger, realize effective sealing between disk seat 6 and the 1 inner wall of valve body from this, prevent the emergence of leaking.

As shown in fig. 2, an annular mounting groove 12 is circumferentially arranged on the valve seat 6, and the inner seal ring 8 is partially embedded in the annular mounting groove 12 and is in interference fit with the annular mounting groove 12. This design has realized the removable operation of interior sealing washer 8, has practiced thrift the maintenance cost.

As shown in fig. 2, the inner end and the outer end of the outer sealing ring 11 are both in a tapered shape with gradually decreasing width. The design reduces the contact area between the inner periphery of the outer sealing ring 11 and the outer periphery of the valve seat 6 and the cross-sectional area between the outer periphery of the outer sealing ring 11 and the inner wall of the valve body 1, so that the extrusion stress on the outer periphery of the valve seat 6 and the inner wall of the valve body 1 when the outer sealing ring 11 deforms under pressure is improved, and the sealing performance between the outer periphery of the valve seat 6 and the inner wall of the valve body 1 is further improved.

As shown in fig. 2, a gasket 13 is interposed between the pressing flange 10 and the outer sealing ring 11, and the gasket 13 is made of a metal material. The gasket 13 can protect the outer seal ring 11 and the valve seat 6.

As shown in fig. 2, a support ring 15 is mounted on the inner wall of the valve body 1 through a locking screw 14, a sealing groove 16 is circumferentially arranged on one end face of the support ring 15, which is attached to the inner wall of the valve body 1, an O-ring 17 for forming a sealing fit with the inner wall of the valve body 1 is embedded in the sealing groove 16, the O-ring 17 and the sealing groove 16 are in interference fit, and the thread groove 7 and the sliding groove 9 are both formed in the support ring 15. The support ring 15 is replaceable, the problem that later stage thread damage is difficult to maintain due to the fact that the thread groove 7 is directly arranged on the inner wall of the valve body 1 is avoided, namely, the thread damage is only needed to be carried out with the replacement of the support ring 15, maintenance operation is facilitated, and meanwhile maintenance cost is greatly reduced.

As shown in fig. 2, a positioning groove 18 is circumferentially formed on the inner wall of the valve body 1, and a positioning flange 19 matched with the positioning groove 18 is formed on the support ring 15. This design can be fixed a position support ring 15 before support ring 15 installs, the installation operation of support ring 15 of being convenient for.

As shown in fig. 2, the supporting ring 15 is provided with a large circular groove 20 and a small circular hole 21 from inside to outside, a small screw hole 22 corresponding to the small circular hole 21 is formed in the inner wall of the valve body 1, the screw portion of the locking screw 14 penetrates through the small circular hole 21 and is screwed into the small screw hole 22, and the screw head of the locking screw 14 is embedded into the large circular groove 20 and abuts against the inner end face of the large circular groove 20. This design can realize being connected between backing ring 15 and the valve body 1, and connection structure is simple reliable, and easy dismounting does benefit to the equipment of earlier stage and the maintenance operation in later stage.

Claims

1. The self-sealing track ball valve comprises a valve body (1), a valve cover (2), a ball body (3) and a valve rod (4), wherein the ball body (3) is arranged in an inner cavity of the valve body (1), the valve cover (2) is installed at the upper end of the valve body (1), the valve rod (4) is arranged on the valve cover (2) in a penetrating mode, the inner end of the valve rod (4) is connected with the ball body (3) in a linkage mode, an actuator (5) is installed above the valve cover (2), the output end of the actuator (5) is connected with the outer end of the valve rod (4) in a linkage mode, and a valve seat (6) is further installed in the valve body (1); the method is characterized in that: the improved ball valve is characterized in that a threaded groove (7) is formed in the inner wall of the valve body (1), the valve seat (6) is in threaded connection with the threaded groove (7), an inner sealing ring (8) which is used for forming sealing fit with the ball body (3) is installed on the valve seat (6), a sliding groove (9) is formed in the inner wall of the valve body (1) along the circumferential direction, a compression flange (10) matched with the sliding groove (9) is arranged on the periphery of the valve seat (6), an outer sealing ring (11) is arranged between the periphery of the valve seat (6) and the inner wall of the valve body (1) in a clamping mode, the inner end of the outer sealing ring (11) abuts against the outer end face of the compression flange (10), and the outer end face of the outer sealing ring (11) abuts against the end face of the sliding groove (9).

2. The self sealing track ball valve of claim 1, wherein: an annular mounting groove (12) is formed in the valve seat (6) along the circumferential direction, and the inner sealing ring (8) is partially embedded in the annular mounting groove (12).

3. The self sealing orbital ball valve of claim 1 wherein: the inner end and the outer end of the outer sealing ring (11) are both in a tapered shape with gradually reduced width.

4. The self sealing orbital ball valve of claim 1 wherein: and a gasket (13) is clamped between the compression flange (10) and the outer sealing ring (11).

5. The self sealing orbital ball valve of claim 1 wherein: install lock ring (15) through locking screw (14) on valve body (1) inner wall, be provided with seal groove (16) along circumference on a terminal surface that lock ring (15) and valve body (1) inner wall laminated mutually, it is used for constituting sealed complex O shape circle (17) with valve body (1) inner wall to inlay in seal groove (16), thread groove (7) and spout (9) are all seted up on lock ring (15).

6. The self sealing orbital ball valve of claim 5 wherein: and a positioning groove (18) is formed in the inner wall of the valve body (1) along the circumferential direction, and a positioning flange (19) matched with the positioning groove (18) is arranged on the support ring (15).

7. The self sealing orbital ball valve of claim 5 wherein: support ring (15) from interior to exterior opens coaxial big circular slot (20) and small circle hole (21) of being provided with, seted up on valve body (1) inner wall with corresponding little screw hole (22) of little round hole (21), the screw rod portion of locking screw (14) runs through little round hole (21) and screw in little screw hole (22), the screw head embedding of locking screw (14) in big circular slot (20) and offset with the terminal surface in big circular slot (20).