CN218377776U - Ball valve and ball valve installation system - Google Patents

Abstract

The utility model relates to the technical field of valves, concretely relates to ball valve and ball valve installing the system. Wherein, the ball valve includes: the valve comprises a valve body, a ball body, a valve seat assembly, a positioning piece, a pushing structure and a disassembling structure. Wherein, the ball body is rotatablely arranged in the valve body; the valve seat assembly is arranged between the valve body and the ball body and comprises a valve seat body and an adjusting ring which are detachably connected, and the adjusting ring is sleeved on the outer side of the valve seat body in the circumferential direction; the positioning piece is arranged between the valve body and the valve seat body and is connected with the valve body and the valve seat body through the connecting piece; the pushing structure and the disassembling structure are formed between the adjusting ring and the positioning piece. Foretell ball valve passes through external propulsion piece and dismantlement piece, drives adjusting collar linear motion, and then drives and adjusting collar fixed connection's disk seat body linear motion, realizes the installation and dismantles, and the installation is steady with the dismantlement process, and simple structure avoids producing great wearing and tearing, improves the life of each part.

Description

Ball valve and ball valve installation system

Technical Field

The utility model relates to the technical field of valves, concretely relates to ball valve and ball valve installing the system.

Background

With the rapid development of science and technology and the continuous improvement of production technology and product structure, ball valves have gradually developed into a main valve class. In China, ball valves are widely applied to various industries and occupy a significant position in national economy.

The ball valve is a valve whose opening and closing element (ball) is driven by valve stem and can make rotary motion around the axis of ball valve, and has the action of rotating 90 deg., and is mainly used for cutting, distributing and changing flow direction of medium in the pipeline. The upper-mounted fixed ball valve is one of the ball valves, can realize on-line repair and replacement, is convenient and quick to detach, realizes bidirectional blocking and communication, and is long in service life and labor-saving to operate.

The top-mounted ball valve is integrated with the valve body, all parts are loaded from the top, the sealing ring sleeves are firstly installed on the valve seat, then the valve seat and the sealing ring are installed in the valve body pipeline, the pre-tightening piece in the valve seat assembly is compressed at the moment, then the ball body is installed, the ball body rotates by 90 degrees, the valve seat is not in contact with the ball body at the moment, then the pre-tightening piece is adjusted, the valve seat is in contact pre-tightening with the ball body, and finally the valve rod, the valve cover and the fixing assembly are mounted. When the valve breaks down on the pipeline and needs to be repaired, the valve does not need to be disassembled from the pipeline, and only the upper fixing component needs to be disassembled, the valve cover and the valve rod are taken down together from the valve body, and then the ball body and the valve seat component are taken out.

However, when the ball valve is actually installed, because the sealing ring needs to be installed on the valve seat first and then installed in the valve body pipeline along with the valve seat during installation, the sealing ring located between the valve seat and the valve body is very easy to be directly impacted and extruded to generate deformation such as rotation and distortion, and further sealing failure is caused, so that medium leakage occurs when the ball valve is closed.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming when disk seat among the prior art carries out the dismouting with the valve body, the sealing member of setting between disk seat and valve body receives the defect that direct impact force leads to damaging easily to a ball valve and ball valve installing the system that the dismouting is simple steady is provided.

In order to solve the above problem, the utility model provides a ball valve, include:

the ball body is rotatably arranged in the valve body;

the valve seat assembly is arranged between the valve body and the ball body and comprises a valve seat body and an adjusting ring which are detachably connected, and the adjusting ring is sleeved on the circumferential outer side of the valve seat body;

the positioning piece is arranged between the valve body and the valve seat body and is connected with the valve body and the valve seat body through a connecting piece;

the pushing structure and the disassembling structure are formed between the adjusting ring and the positioning piece, the pushing structure is suitable for being connected with an external pushing piece, and the disassembling structure is suitable for being connected with an external disassembling piece;

the ball valve is driven by an external propelling piece, and the propelling structure drives the adjusting ring to move towards the direction close to the positioning piece so as to install the propelling state of the valve seat body; and under the driving of the external dismounting piece, the dismounting structure drives the adjusting ring to move towards the direction far away from the positioning piece so as to dismount the valve seat body.

Optionally, in the above ball valve, the propelling structure includes: the shaping is in locking part and shaping on the setting element are in conduction portion on the adjustment collar, the locking part be suitable for with external propulsion piece fixed connection, conduction portion be suitable for with external propulsion piece wears to establish.

Optionally, in the ball valve described above, the locking portion is a threaded hole formed in an end surface of the positioning member; the conduction part is of a through hole structure, and the extending direction of the through hole structure is parallel to the axial direction of the adjusting ring.

Optionally, in the ball valve described above, the disassembling structure includes: the shaping is in regulating part on the adjusting collar, regulating part is suitable for and connects soon with external dismantlement piece, under the dismantlement state, external dismantlement piece rotates in order to drive the linear motion of adjusting collar.

Optionally, in the ball valve described above, the adjusting portion is a threaded hole, and an extending direction of the threaded hole is parallel to an axial direction of the adjusting ring.

Optionally, in the ball valve described above, the positioning member further has a first connecting portion; the valve seat body is also provided with a second connecting part; the connecting piece is detachably connected with the first connecting part and the second connecting part.

Optionally, in the ball valve described above, the first connecting portion is a threaded through hole formed in a circumferential wall surface of the positioning member, and an extending direction of the threaded through hole extends in the same direction as a radial direction of the positioning member; the second connecting part is an open slot formed on the valve seat body.

Optionally, in the ball valve, the valve body is provided with an installation step, the installation step is provided with a third connection portion, and the third connection portion is suitable for the connection piece to penetrate through.

Optionally, the ball valve further comprises a sealing structure, wherein the sealing structure comprises a first sealing element, a second sealing element and a third sealing element;

a sealing space suitable for accommodating the sealing structure is formed at the position where the valve seat body is contacted with the valve body, and the first sealing element and the second sealing element are respectively positioned in the sealing space between the valve seat body and the valve body at two sides of the ball body;

the valve seat body is provided with a mounting groove which is concavely arranged from inside to outside in the direction towards the ball body, and a third sealing element is arranged in the mounting groove and is suitable for blocking medium seepage when the ball valve is closed.

Optionally, in the ball valve described above, the valve seat assembly further includes an elastic member, the elastic member is sleeved on the valve seat body and located between the positioning member and the adjusting ring, and the elastic member has a pressing force that drives the adjusting ring and the valve seat body to move toward the ball body and further compress the ball body when the adjusting ring approaches the positioning member.

The utility model also provides a ball valve installing the system, include: the ball valve, and the pusher and the stripper.

The utility model has the advantages of it is following:

1. the utility model provides a ball valve, the shaping sets up propulsion structure and dismantles the structure between adjusting collar and setting element, through external propulsion and dismantlement, drives adjusting collar linear motion, and then drives and adjusting collar fixed connection's disk seat body linear motion, realizes the installation and dismantles, and the installation is steady with the dismantlement process, and simple structure avoids producing great wearing and tearing, improves the life of each part.

2. The utility model provides a ball valve sets up the third connecting portion in the installation step position of valve body, sets up first connecting portion on the setting element, sets up the second connecting portion on valve seat body, connects gradually through the connecting piece, avoids making valve seat body rotate when adjusting the adjusting collar, and then leads to producing harmful wear between valve seat body and first sealing member, second sealing member and the valve body, damages the sealing member, and simple structure is reliable.

3. The utility model provides a ball valve sets up the second connecting portion on the disk seat body, not only can play the rotation-proof effect, can also play the guide effect, allows the disk seat subassembly to produce axial displacement and can follow sharp entering or break away from the valve body promptly.

4. The utility model provides a ball valve, set up screw hole and through-hole on the adjusting ring simultaneously, set up the screw hole on the setting element up end, the through-hole on the adjusting ring corresponds with screw hole position on the setting element, cooperate the propulsion piece to realize the propulsion of valve seat subassembly; the valve seat assembly can be disassembled by matching the threaded hole on the adjusting ring with the disassembling piece and abutting against the end face of the positioning piece. The valve seat assembly can be assembled and disassembled on line only by the simple propelling part and the disassembling part, and the tool is simple and convenient to operate.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a ball valve provided in an embodiment of the present invention;

fig. 2 is a schematic view of a seat assembly of a ball valve provided in an embodiment of the present invention;

fig. 3 is a schematic view of a valve body of a ball valve provided in an embodiment of the present invention;

FIG. 4 is an enlarged view of portion A shown in FIG. 1;

FIG. 5 is an enlarged view of portion B shown in FIG. 1;

fig. 6 is a schematic view of a positioning member of a ball valve provided in an embodiment of the present invention;

fig. 7 is a schematic view of an adjustment ring of a ball valve provided in an embodiment of the present invention;

fig. 8 is a schematic view of a ball valve provided in an embodiment of the present invention before installation of a seat assembly;

fig. 9 is a schematic view of a ball valve provided in an embodiment of the present invention after installation of a seat assembly;

fig. 10 is a schematic view of a ball valve with a seat assembly removed according to an embodiment of the present invention;

fig. 11 is a schematic view of a ball valve provided in an embodiment of the present invention after disassembly of a seat assembly;

description of reference numerals:

1-a valve body; 11-mounting a step; 111-a third connection;

2-a sphere;

3-a valve seat assembly; 31-a valve seat body; 311-a second connection; 312-a mounting groove; 32-an adjusting ring; 321-a conducting part; 322-an adjustment section; 33-an elastic member;

4-a positioning element; 41-a locking portion; 42-a first connection;

51-a first seal; 52-a second seal; 53-a third seal; 54-a sealed space;

6-connecting piece;

7-a propelling member;

8-disassembling the piece.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

With reference to fig. 1-11, the present embodiment provides a ball valve, including: the valve comprises a valve body 1, a ball body 2, a valve seat component 3, a positioning piece 4, a pushing structure and a disassembling structure.

Wherein, the ball body 2 is rotatably arranged in the valve body 1; the valve seat assembly 3 is arranged between the valve body 1 and the ball body 2, the valve seat assembly 3 comprises a valve seat body 31 and an adjusting ring 32 which are detachably connected, and the adjusting ring 32 is sleeved on the circumferential outer side of the valve seat body 31; the positioning piece 4 is arranged between the valve body 1 and the valve seat body 31 and is connected with the valve body 1 and the valve seat body 31 through the connecting piece 6; a pushing structure and a disassembling structure are formed between the adjusting ring 32 and the positioning part 4, the pushing structure is suitable for being connected with the externally connected pushing part 7, and the disassembling structure is suitable for being connected with the externally connected disassembling part 8;

the ball valve is provided with a propelling state that under the driving of an external propelling part 7, an adjusting ring 32 is driven by a propelling structure to move towards the direction close to the positioning part 4 so as to install the valve seat body 31; and under the drive of the externally connected disassembling piece 8, the disassembling structure drives the adjusting ring 32 to move towards the direction away from the positioning piece 4 so as to disassemble the valve seat body 31.

Specifically, the valve seat body 31 and the adjusting ring 32 are connected by threads, and the adjusting ring 32 can be screwed in and out on the circumferential outer side surface of the valve seat body 31; the positioning piece 4 is firstly arranged on the inner wall of the valve body 1, is arranged between the valve body 1 and the valve seat body 31 after the valve seat assembly 3 is pushed, and is connected with the positioning piece 4, the valve body 1 and the valve seat body 31 through the connecting piece 6, so that the valve seat assembly 3 is prevented from rotating in work.

Through constructing the propelling structure and the disassembling structure on the adjusting ring 32 and the positioning part 4, the valve seat body 31 is stably propelled into the valve body 1 by the propelling part 7 which is externally connected, and the valve seat body 31 is stably disassembled from the valve body 1 by the matching of the disassembling part 8 which is externally connected, so that the installation and the disassembly are simple and stable, the damage to the components is small, and the service life of the ball valve is prolonged.

Specifically, as shown in fig. 8 and 9, the retainer 4 is provided with the locking portion 41, and the adjuster collar 32 is provided with the conduction portion 321, thereby forming a pushing structure. External propulsion piece 7 is worn to establish and is further got into sticking part 41 through conduction portion 321, promotes the adjustment ring 32 through adjusting external propulsion piece 7 and removes to setting element 4 direction, and then drives and installs into valve body 1 with adjustment ring 32 screw thread fixed connection's disk seat body 31, and in this embodiment, external propulsion piece 7 selects two, and the symmetry sets up, advances simple structure, and the installation is steady and the atress is even.

As shown in fig. 6 and 7, in the present embodiment, the locking portions 41 on the positioning member 4 are threaded holes formed on the end surface of the positioning member 4, and are provided in the upper half portion of the positioning member 4, and are provided in 4 numbers and uniformly distributed; conduction portion 321 on the adjusting collar 32 is the through-hole of shaping on adjusting collar 32 terminal surface, the extending direction of through-hole is parallel with the axial direction of adjusting collar 32, the quantity of through-hole is unanimous with the quantity of screw hole, the position is corresponding, also set up to evenly distributed's 4, because the latter half is difficult to stretch into when manual operation, the event only sets up in the first half, save the processingquantity, evenly distributed's screw hole and through-hole can make to have a plurality of angles and insert external propulsion 7 in propulsion process, valve seat body 31 atress is even, be difficult to damage each part, effectively improve the life of ball valve.

As shown in fig. 10 and fig. 11, the adjusting ring 32 is provided with an adjusting portion 322, the external dismounting member 8 is screwed into the adjusting portion 322 until one end of the adjusting portion 322 abuts against the end surface of the positioning member 4, and the external dismounting member 8 is rotated, because the adjusting ring 32 is fixedly connected with the valve seat body 31 through the screw thread, the external dismounting member 8 drives the adjusting ring 32 to move outwards, and further drives the valve seat body 31 to move linearly outwards to separate from the valve body 1.

Specifically, as shown in fig. 7, the adjustment portion 322 is formed as a threaded hole in the adjustment ring 32, and the extending direction of the threaded hole is parallel to the axial direction of the adjustment ring 32; in this embodiment, similarly, the adjusting portions 322 are only disposed on the upper half portion of the adjusting ring 32, so as to save the processing amount, the number of the adjusting portions 322 is 5, one adjusting portion is disposed at the middle position of the upper half portion, and the rest adjusting portions are disposed adjacent to the conduction portion 321 at intervals, so that the processing stress is uniform, and meanwhile, when the adjusting ring 32 and the positioning member 4 are mounted and dismounted, the rotation angle is not large, and the rotation wear is reduced.

In this embodiment, as shown in fig. 6 and 9 or 11, the positioning element 4 is provided with a first connecting portion 42, the valve seat body 31 is provided with a second connecting portion 311, and the connecting element 6 passes through the first connecting portion 42 and abuts against the second connecting portion 311, so that the positioning element 4 and the valve seat body 31 cannot rotate relatively, and the installation stability is enhanced.

Specifically, the first connecting portion 42 is a threaded through hole formed in the circumferential wall surface of the positioning member 4, and the extending direction of the threaded through hole extends in the same direction as the viewing direction of the positioning member 4; the second connecting portion 311 is an open slot formed on the valve seat body 31, and it should be noted that the extending direction of the second connecting portion 311 is the same as the axial direction of the valve seat body 31, and the width is not too large, so as to match with the radial width of the connecting member 6 extending into the open slot, so as to achieve the purpose of preventing rotation.

As shown in fig. 3, the valve body 1 is provided with an installation step 11, the installation step 11 is provided with a third connecting portion 111, the extending direction of the third connecting portion 111 corresponds to the extending direction of the first connecting portion 42, the connecting member 6 sequentially penetrates through the third connecting portion 111, the first connecting portion 42, until the second connecting portion 311 is abutted, so that the positioning member 4 and the valve seat body 31 cannot rotate, wear between the installation parts is reduced, so that the valve seat assembly 3 cannot rotate when the ball valve works, the ball valve is tightly contacted with the ball body 2, and the reliability of the ball valve is high.

Further, the ball valve of the present embodiment further includes a sealing structure including a first sealing member 51, a second sealing member 52, and a third sealing member 53. A sealing space 54 adapted to accommodate a sealing structure is configured at a position where the valve seat body 31 contacts the valve body 1, and a first sealing member 51 and a second sealing member 52 are respectively located in the sealing space 54 between the valve seat body 31 and the valve body 1 on both sides of the ball 2; the valve seat body 31 has a mounting groove 312 concavely arranged from inside to outside in the direction towards the ball 2, and a third sealing member 53 is arranged in the mounting groove 312 and is suitable for blocking medium seepage when the ball valve is closed.

Specifically, the first sealing element 51 and the second sealing element 52 may both be single-piston lip-shaped sealing rings, may both be double-piston lip-shaped sealing rings, may be one single-piston lip-shaped sealing ring, and may be one double-piston lip-shaped sealing ring; in this embodiment, as shown in fig. 4 and 5, the type of the third seal ring is not limited, the first seal 51 is a single-piston lip seal ring, and the second seal 52 is a double-piston lip seal ring, which can ensure a good sealing effect and save cost.

Further, as shown in fig. 2, the valve seat assembly 3 further includes an elastic member 33, the elastic member 33 is sleeved on the valve seat body 31 and located between the positioning member 4 and the adjusting ring 32, and the elastic member 33 can drive the adjusting ring 32 and the valve seat body 31 to move towards the ball 2 when the adjusting ring 32 approaches towards the positioning member 4, so as to press the ball 2; in this embodiment, the elastic member 33 is a disk spring, which has a large load but a short stroke, requires a small space, and is convenient to use and has good safety performance.

Example 2

With reference to fig. 8-11, the present embodiment provides a ball valve mounting system comprising the ball valve of embodiment 1, as well as a pusher member 7 and a stripper member 8.

Specifically, in the present embodiment, in the installation process, the pushing member 7 selects a nut and a screw to cooperate, one end of the screw passes through the conduction portion 321 on the adjusting ring 32 and enters the locking portion 41 on the positioning member 4, and the nut screwed on the other end of the screw abuts against the end face of the adjusting ring 32, so that the valve seat assembly 3 is pushed into the valve body 1 by rotating the nut; during disassembly, the disassembly part 8 selects a socket head cap screw, the socket head cap screw is screwed into the adjusting part 322 on the adjusting ring 32 until the socket head cap screw abuts against the end face of the positioning part 4, the valve seat assembly 3 is withdrawn from the valve body 1 by the reaction force generated by screwing the socket head cap screw, and the valve seat assembly 3 is disassembled.

The seating assembly 3 is installed as follows:

s1: a positioning piece 4 is arranged in the valve body 1, and the positioning piece 4 is fixed through a connecting piece 6;

s2: the valve seat component 3 is initially installed in the valve body 1, at the moment, the tail part of the valve seat body 31 enters an inner positioning step of the valve body 1, and the first sealing element 51 and the second sealing element 52 are not compressed;

s3: the valve seat component 3 is evenly and smoothly completely pressed into the valve body 1 through the matching of 2 screws and 2 nuts, the connecting piece 6 is screwed off and embedded into the second connecting part 311, and the screws and the nuts are removed;

s4: the ball 2 is installed and rotated by 90 degrees, and the ball 2 is not contacted with the valve seat body 31 at the moment;

s5: the adjusting ring 32 is screwed to compress the elastic element 33, the compression amount of the elastic element 33 can be adjusted, the elastic element 33 pushes the third sealing element 53 on the valve seat assembly 3 to be tightly attached to the ball 2 in a reaction manner, sealing is achieved, and the valve seat assembly 3 is installed.

The disassembly process of the valve seat assembly 3 is as follows:

s1: rotating the adjusting ring 32 to separate the adjusting ring 32 from the elastic member 33, and the elastic member 33 is in an uncompressed state;

s2: the screw rod is screwed into the locking part 41 of the positioning piece 4 through the conduction part 321 of the adjusting ring 32, the nut is screwed to press the valve seat component 3 into the valve body 1, the valve seat component 3 is separated from the ball body 2, and the ball body 2 can be taken out after rotating 90 degrees;

s3: the dismounting member 8 is screwed into the adjusting portion 322 of the adjusting ring 32 and abuts against the end surface of the positioning member 4, and the valve seat assembly 3 is pushed out of the valve body 1 by the reaction force generated by screwing the dismounting member 8, so that the dismounting of the valve seat assembly 3 is completed.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (11)

1. A ball valve is characterized by comprising

The valve comprises a valve body (1) and a ball body (2), wherein the ball body (2) is rotatably arranged in the valve body (1);

the valve seat assembly (3) is arranged between the valve body (1) and the ball body (2), the valve seat assembly (3) comprises a valve seat body (31) and an adjusting ring (32) which are detachably connected, and the adjusting ring (32) is sleeved on the outer side of the valve seat body (31) in the circumferential direction;

the positioning piece (4) is arranged between the valve body (1) and the valve seat body (31) and is connected with the valve body (1) and the valve seat body (31) through a connecting piece (6);

the pushing structure and the disassembling structure are formed between the adjusting ring (32) and the positioning piece (4), the pushing structure is suitable for being connected with an external pushing piece (7), and the disassembling structure is suitable for being connected with an external disassembling piece (8);

the ball valve is driven by an external propelling piece (7), and the propelling structure drives the adjusting ring (32) to move towards the direction close to the positioning piece (4) so as to install the propelling state of the valve seat body (31); and under the driving of the external dismounting part (8), the dismounting structure drives the adjusting ring (32) to move towards the direction far away from the positioning part (4) so as to dismount the dismounting state of the valve seat body (31).

2. The ball valve of claim 1, wherein the urging structure comprises: the locking part (41) and the conduction part (321) of shaping on the setting element (4) are in the formation on regulating collar (32), locking part (41) are suitable for with external propulsion piece (7) fixed connection, conduction part (321) be suitable for with external propulsion piece (7) wear to establish.

3. A ball valve according to claim 2, characterized in that the locking portion (41) is a threaded hole formed in the end face of the retainer (4); the conduction part (321) is of a through hole structure, and the extending direction of the through hole structure is parallel to the axial direction of the adjusting ring (32).

4. The ball valve according to any one of claims 1-3, wherein the disassembly structure comprises: the shaping is in regulating part (322) on regulating collar (32), regulating part (322) are suitable for and connect with external dismounting piece (8) soon, and under the dismantlement state, external dismounting piece (8) rotate in order to drive regulating collar (32) linear motion.

5. The ball valve according to claim 4, characterized in that the adjustment portion (322) is a threaded hole extending in a direction parallel to the axial direction of the adjustment ring (32).

6. A ball valve according to any one of claims 1 to 3, characterized in that said positioning member (4) further has a first connection portion (42); the valve seat body (31) is also provided with a second connecting part (311); the connecting piece (6) is detachably connected with the first connecting part (42) and the second connecting part (311).

7. The ball valve according to claim 6, wherein the first connecting portion (42) is a threaded through hole formed in a circumferential wall surface of the positioning member (4), and the threaded through hole extends in the same direction as a radial direction of the positioning member (4); the second connecting portion (311) is an open groove formed in the valve seat body (31).

8. The ball valve according to claim 7, characterized in that the valve body (1) is provided with a mounting step (11), the mounting step (11) is provided with a third connecting portion (111), and the third connecting portion (111) is suitable for the connecting piece (6) to penetrate through.

9. The ball valve according to any of claims 1-3, further comprising a sealing structure comprising a first seal (51), a second seal (52), and a third seal (53);

the position where the valve seat body (31) is contacted with the valve body (1) is configured with a sealing space (54) suitable for accommodating the sealing structure, and the first sealing element (51) and the second sealing element (52) are respectively positioned in the sealing space (54) between the valve seat body (31) and the valve body (1) at two sides of the ball body (2);

the valve seat body (31) is provided with a mounting groove (312) which is concavely arranged from inside to outside in the direction facing the ball body (2), and a third sealing element (53) is arranged in the mounting groove (312) and is suitable for blocking medium seepage when the ball valve is closed.

10. A ball valve according to any of claims 1-3, characterized in that the seat assembly (3) further comprises:

elastic component (33), elastic component (33) cover is established on valve seat body (31), is located between setting element (4) and adjusting ring (32), elastic component (33) have adjusting ring (32) to drive when setting element (4) direction is close to adjusting ring (32) and valve seat body (31) move to spheroid (2) direction and then compress tightly the packing force of spheroid (2).

11. A ball valve mounting system, comprising:

the ball valve of any one of claims 1-10;

and a pusher (7) and a stripper (8).

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