CN111503304A - Ball valve and assembling method thereof - Google Patents

Ball valve and assembling method thereof Download PDF

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Publication number
CN111503304A
CN111503304A CN202010270931.9A CN202010270931A CN111503304A CN 111503304 A CN111503304 A CN 111503304A CN 202010270931 A CN202010270931 A CN 202010270931A CN 111503304 A CN111503304 A CN 111503304A
Authority
CN
China
Prior art keywords
cover plate
valve
ball
end cover
groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010270931.9A
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Chinese (zh)
Inventor
王苇
柳勇
柯志武
林原胜
赵振兴
柯汉兵
代路
戴春辉
李勇
李邦明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan No 2 Ship Design Institute No 719 Research Institute of China Shipbuilding Industry Corp
Original Assignee
Wuhan No 2 Ship Design Institute No 719 Research Institute of China Shipbuilding Industry Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan No 2 Ship Design Institute No 719 Research Institute of China Shipbuilding Industry Corp filed Critical Wuhan No 2 Ship Design Institute No 719 Research Institute of China Shipbuilding Industry Corp
Priority to CN202010270931.9A priority Critical patent/CN111503304A/en
Publication of CN111503304A publication Critical patent/CN111503304A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0657—Particular coverings or materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P21/00—Machines for assembling a multiplicity of different parts to compose units, with or without preceding or subsequent working of such parts, e.g. with programme control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0647—Spindles or actuating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Taps Or Cocks (AREA)
  • Valve Housings (AREA)

Abstract

The invention relates to the field of valve bodies and provides a ball valve and an assembling method thereof. The ball valve comprises a valve ball, a valve body and an upper end cover plate, wherein a valve shaft is constructed on the valve ball, the ball valve also comprises a sealing cover plate and a clamping ring, and the sealing cover plate and the upper end cover plate are fixedly connected and are both arranged at the port of the valve body; the sealing cover plate is abutted against the root of the valve shaft of the valve ball; the inner wall of the valve body is provided with a groove, the clamping ring is clamped in the groove, and the part of the clamping ring exposed out of the groove is clamped between the upper end cover plate and the sealing cover plate. According to the ball valve provided by the invention, the upper end cover plate and the sealing cover plate are fixedly connected, the axial movement of the upper end cover plate and the sealing cover plate along the valve shaft can be limited through the clamping ring, and compared with the traditional ball valve structure, the liquid pressure in the ball valve is finally borne by the clamping ring, so that the situation that the leakage is caused by the fact that the liquid pressure in the ball valve impacts the upper end cover plate and the sealing is not tight is effectively avoided.

Description

Ball valve and assembling method thereof
Technical Field
The invention relates to the technical field of valve bodies, in particular to a ball valve and an assembling method thereof.
Background
The ball valve has wide application in the fields of petroleum, chemical industry, energy, mineral products and the like, is an important component in industrial pipelines, and is mainly used for controlling the on-off of the pipelines. Generally, during the assembly process of the ball valve, the valve ball needs to be installed into the valve body from the upper end of the ball valve, so that the caliber of an upper end opening of the ball valve is large, and therefore, very high requirements are put on the installation and fixation of an upper end cover plate of a sealing ball valve, particularly on a high-pressure ball valve. If the upper end cover plate is unreliable in fixation, ball valve explosion is easy to occur, and serious safety accidents are caused.
Generally, an upper end cover plate of a ball valve is fixed on a valve body of the ball valve through bolts, under the fixing mode, pressure of a medium in the valve on the upper end cover plate is finally borne by fastening bolts, and under the driving of alternating tensile force, the bolts are easy to loosen under the driving of long-time pressure fluctuation, so that the upper end cover plate is not sealed tightly, and leakage is caused; on the other hand, the fatigue of the bolt is easily caused, the strength of the bolt is reduced, and potential safety hazards are formed.
Disclosure of Invention
The invention aims to provide a ball valve and an assembling method thereof, which are used for solving the problems of leakage and low safety caused by the fact that an upper end cover plate and a valve body are fixed by bolts in the existing ball valve.
In order to solve the technical problem, the invention provides a ball valve, which comprises a valve ball, a valve body and an upper end cover plate, wherein a valve shaft is constructed on the valve ball, the ball valve also comprises a sealing cover plate and a clamping ring, and the sealing cover plate and the upper end cover plate are fixedly connected and are both arranged at the port of the valve body; the sealing cover plate is abutted against the root part of the valve shaft; the inner wall of the valve body is provided with a groove, the clamping ring is clamped in the groove, and the part of the clamping ring exposed out of the groove is clamped between the upper end cover plate and the sealing cover plate.
Further, the valve body and the outer wall of the upper end cover plate are circumferentially fixed through a limiting groove and a limiting block which are matched with each other.
Furthermore, the spacing groove includes a plurality of, a plurality of the spacing groove all is located on the valve body and along the circumference equipartition of valve body.
Further, the snap ring comprises at least three sections of ring bodies, and the ring bodies are sequentially connected end to end.
Furthermore, two end faces of at least one section of the ring body are parallel to a certain diameter of the snap ring.
Furthermore, one side of the upper end cover plate, which is close to the sealing cover plate, is provided with a first step surface, and the part of the clamping ring, which is exposed out of the groove, is abutted against the first step surface.
Furthermore, the port of the valve body is provided with an annular groove, a flange is arranged along the circumferential direction of the upper end cover plate, and the flange is accommodated in the annular groove.
Furthermore, a clamping block is convexly arranged on one side, far away from the valve ball, of the sealing cover plate, a clamping groove is formed in one side, facing the valve ball, of the upper end cover plate, and the clamping block is clamped in the clamping groove.
Further, the valve shaft is a stepped shaft, a stepped hole is formed in the middle of the sealing cover plate, and the stepped shaft is inserted into the stepped hole.
In order to solve the technical problem, the invention also provides an assembly method of the ball valve, which comprises the following steps:
step S10, installing the valve ball with the valve shaft into the valve body, and clamping and fixing the sealing cover plate at the port of the valve body;
step S20, respectively installing each ring body of a clamping ring into a groove on the valve body, wherein one side of the clamping ring is abutted against one side of the sealing cover plate far away from the valve ball;
step S30, mounting an upper end cover plate at the port of the valve body, wherein the upper end cover plate is pressed on the snap ring towards one side of the valve ball, and the upper end cover plate is clamped and matched with a limiting block and a limiting groove on the valve body;
and step S40, fixedly connecting the upper end cover plate with the sealing cover plate by adopting a fastener.
According to the ball valve provided by the invention, the upper end cover plate and the sealing cover plate are fixedly connected, the axial movement of the upper end cover plate and the sealing cover plate along the valve shaft can be limited through the clamping ring, and compared with the traditional ball valve structure, the liquid pressure in the ball valve is finally borne by the clamping ring, so that the situation that the leakage is caused by the fact that the liquid pressure in the ball valve impacts the upper end cover plate, and the sealing is not tight is effectively avoided.
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 description of the embodiments or 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 those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a ball valve according to an embodiment of the present invention;
FIG. 2 is a partial cross-sectional view of the valve body shown in FIG. 1;
FIG. 3 is a schematic view of the valve body and upper end cover plate shown in FIG. 1 in mating relationship;
FIG. 4 is a top plan view of the upper end cover plate shown in FIG. 1;
FIG. 5 is a schematic structural view of the snap ring shown in FIG. 1;
FIG. 6 is a cross-sectional view of the upper end cap plate shown in FIG. 1;
fig. 7 is a sectional view of the sealing cap shown in fig. 1.
In the figure: 1. a valve ball; 11. a valve shaft; 2. a valve body; 21. a groove; 22. a limiting groove; 3. an upper end cover plate; 31. a limiting block; 32. a first step surface; 33. a flange; 34. a card slot; 4. sealing the cover plate; 41. a through hole; 42. a clamping block; 5. a snap ring; 51. a first ring body; 52. a second ring body; 53. a third ring body; 54. a fourth ring body; 6. and (4) bolts.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "first" and "second" are used for the sake of clarity in describing the numbering of the components of the product and do not represent any substantial difference, unless explicitly stated or limited otherwise. The directions of "up", "down", "left" and "right" are all based on the directions shown in the attached drawings. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the ball valve comprises a valve ball 1, a valve body 2, an upper end cover plate 3, a sealing cover plate 4 and a clamping ring 5. The valve ball 1 is arranged in a cavity in the valve body 2, and the upper end cover plate 3 and the sealing cover plate 4 are fixedly connected through bolts and are both arranged at the port of the valve body 2; a snap ring 5 is mounted between the upper end cover plate 3 and the sealing cover plate 4. Specifically, the valve ball 1 is provided with a valve shaft 11, the valve shaft 11 is inserted into the sealing cover plate 4 and the upper end cover plate 3, and the valve shaft is in sliding fit with the upper end cover plate 3 and the sealing cover plate 4. The sealing cover plate 4 abuts against the root of the valve shaft 11, i.e. the sealing cover plate 4 is closer to the ball body of the valve ball 1 than the upper end cover plate 3. As shown in fig. 2, the inner wall of the valve body 2 is provided with a groove 21, the snap ring 5 is clamped in the groove 21, and the part of the snap ring 5 exposed out of the groove 21 is clamped between the upper end cover plate 3 and the sealing cover plate 4.
According to the ball valve provided by the embodiment of the invention, the upper end cover plate 3 and the sealing cover plate 4 are fixedly connected, the axial movement of the upper end cover plate 3 and the sealing cover plate 4 along the valve shaft can be limited through the clamping ring 5, and compared with the traditional ball valve structure, the liquid pressure in the ball valve is finally borne by the clamping ring 5, so that the situation of leakage caused by untight sealing due to the fact that the liquid pressure in the ball valve impacts the upper end cover plate 3 is effectively avoided.
Further, the valve body 2 and the upper end cover plate 3 are circumferentially fixed by the limiting groove 22 and the limiting block 31. In an embodiment, as shown in fig. 3, a limiting groove 22 is provided at the port of the valve body 2, and as shown in fig. 3 and 4, a limiting block 31 is convexly provided on the outer wall of the upper end cover plate 3. The number of the limiting blocks 31 is the same as that of the limiting grooves 22, and one or more limiting blocks 31 can be arranged, and when the number of the limiting blocks is one, the limiting blocks 31 are directly arranged in the limiting grooves 22 to prevent the upper end cover plate 3 and the sealing cover plate 4 which are fixedly connected together from moving along the circumferential direction of the valve shaft; when the number of the two is multiple, the two are arranged in one-to-one correspondence. Preferably, spacing groove 22 includes a plurality ofly, and a plurality of spacing grooves 22 are along the circumference equipartition of valve body 2, and corresponding to this, stopper 31 is along the outer wall circumference equipartition of upper end cover plate 3. In this embodiment, the rotation of the upper end cover plate 3 and the seal cover plate 4 in the circumferential direction of the valve shaft is restricted by the cooperation of the stopper 31 and the stopper groove 22, thereby achieving reliable fixation of the upper end cover plate 3. Therefore, according to the ball valve provided by the embodiment of the invention, the upper end cover plate 3 and the sealing cover plate 4 cannot rotate along the circumferential direction under the action of the limiting block 31 and the limiting groove 22, and the valve shaft can be limited to move along the axial direction under the action of the clamping ring 5, so that the reliability of ball valve assembly is improved, and the upper end cover plate 3 is prevented from being sealed untight due to internal fluid pressure. In another embodiment, the valve body 2 is provided with a limiting block, and the upper end cover plate 3 is provided with a limiting groove. At the moment, the port of the valve body 2 is a stepped hole, the large-diameter section of the stepped hole is far away from the valve ball 1, a limiting block is arranged on the inner wall of the valve body 2 corresponding to the large-diameter section in a protruding mode, and the outermost end of the limiting block does not extend into the small-diameter section of the valve body 2 so as to avoid influencing the installation of the valve ball 1; correspondingly, a limit groove is formed in the matching area of the upper end cover plate 3 and the stepped hole, so that circumferential locking of the upper end cover plate 3 and the sealing cover plate 4 is realized. Similarly, the number and distribution of the limiting grooves and the limiting blocks can be set to be one or more of uniformly distributed or randomly distributed according to requirements. Of course, the valve body 2 may also be provided with a limiting block and a limiting groove at the same time, and the upper end cover plate 3 is correspondingly provided with a limiting groove and a limiting block, which will not be described in detail in the embodiment of the present invention.
Because the outer diameter of the snap ring 5 is larger than the inner diameter of the port of the valve body 2, the snap ring 5 provided by the embodiment of the invention comprises at least three sections of ring bodies, and the at least three sections of ring bodies are sequentially connected end to form a ring shape. For example, the snap ring 5 may be divided into three, four or five segments, for which no specific requirement is made in the embodiment of the present invention. When assembling, the snap ring 5 can be installed in the groove 21 by installing the ring bodies one by one.
Wherein, two end faces of at least one ring body in the ring bodies are parallel to a certain diameter of the snap ring 5. When assembling, one of the ring bodies with two end faces parallel to a certain diameter of the clamping ring 5 is finally clamped, so that the clamping is smoothly carried out. Specifically, as shown in fig. 5, the snap ring 5 is formed by sequentially splicing four sections of a first ring body 51, a second ring body 52, a third ring body 53 and a fourth ring body 54 end to end. Wherein, two end faces of the first ring body 51 extend along the radial direction of the snap ring 5 to form radial end faces; two end faces of the third ring body 53 extend along a direction parallel to the diameter of the snap ring 5, i.e., parallel end faces are formed; the second ring body 52 and the fourth ring body 54 have the same structure, one end face is a radial end face and is in butt joint with two end faces of the first ring body 51, and the other end face is a parallel end face and is used for butt joint with two end faces of the third snap ring 53. In addition, there may be other partitioning methods, and the embodiments of the present invention are not illustrated.
Specifically, as shown in fig. 6, a first step surface 32 is provided on a side of the upper end cover plate 3 close to the sealing cover plate 4, and a portion of the snap ring 5 exposed out of the groove 21 abuts against the first step surface 32. The snap ring 5 is sandwiched between the first step face 32 and the sealing cover 4. Of course, a stepped surface may also be provided on the side of the sealing cover 4 facing away from the valve ball 1. One side of the clamping ring 5 is abutted against the stepped surface, and the other side of the clamping ring 5 is abutted against the end surface of the flat upper end cover plate 3. The embodiment of the present invention is not particularly limited, as long as the snap ring is disposed in the receiving cavity formed by the groove 21, the upper end cover plate 3 and the sealing cover plate 4.
In the embodiment of the invention, the port of the valve body 2 is provided with an annular groove, the large-diameter end of the annular groove is positioned on the outer side of the valve body 2, and the groove 21 is positioned in the small-diameter area of the annular groove. As shown in fig. 6, the upper end cover plate 3 is provided with a flange 33, and the flange 33 is received in an annular groove at the port of the valve body 2. Of course, the port of the valve body 2 may also be provided with a through hole with the same aperture, the upper end cover plate 3 is installed in the through hole, and the limiting block 31 on the upper end cover plate 3 and the limiting groove 22 on the valve body 2 are matched with each other to limit the circumferential movement of the upper end cover plate 3 and the valve shaft 11, and simultaneously, the axial position of the upper end cover plate 3 can also be positioned.
As shown in fig. 7, a through hole 41 is formed in the middle of the sealing cover plate 4, the valve shaft 11 is a stepped shaft, and the stepped shaft is inserted into the through hole 41. The valve shaft 11 is in sliding sealing engagement with the inner wall of the through hole 41, and a seal ring is mounted between the valve shaft 11 and the wall of the through hole 41. Specifically, the seal cover plate 4 and the upper end cover plate 3 are fixedly connected by bolts.
Specifically, in the embodiment of the present invention, a clamping block 42 is convexly disposed on a side of the sealing cover plate 4 away from the valve ball 1, a clamping groove 34 is disposed on a side of the upper end cover plate 3 facing the valve ball 1, the clamping block 42 is clamped in the clamping groove 34, and the upper end cover plate 3 and the sealing cover plate 4 are fixed together by fastening with a bolt.
In addition, the invention also provides an assembly method of the ball valve, which comprises the following steps:
in step S10, the valve ball 1 with the valve shaft 11 attached is loaded into the valve body 2, and the sealing cover plate 4 is fixed to the port of the valve body 2 by clamping. The outer wall of the sealing cover plate 4 is fixedly attached to the inner wall of the valve body 2, and a sealing ring is arranged between the outer wall of the sealing cover plate 4 and the inner wall of the valve body 2. The through hole 41 of the sealing cover plate 4 is in sliding seal with the valve shaft 11.
In step S20, the ring bodies of the snap ring 5 are respectively fitted into the grooves 21 of the valve body 2, so that one side of the snap ring 5 abuts against one side of the sealing cover plate 4 away from the valve ball 1. As shown in fig. 5, the first ring 51, the second ring 52 and the fourth ring 54 are first installed in the groove 21, and finally the third ring 53 is installed in the groove 21, thereby forming a complete ring structure.
And step S30, the upper end cover plate 3 is installed at the port of the valve body 2, and one side of the upper end cover plate 3 facing the valve ball 2 is pressed on the snap ring 5, so that the limiting block 31 on the upper end cover plate 3 is clamped in the limiting groove 22 of the valve body 2. Thereby, the snap ring 5 is snap fitted in the groove 21 and sandwiched by the upper end cover plate 3 and the sealing cover plate 4.
Step S40, the upper end cover plate 3 is fixedly connected to the sealing cover plate 4 by fasteners such as bolts 6.
Compared with the traditional mode that the upper end cover plate is directly fixed at the port of the valve body through the bolt, the ball valve provided by the embodiment of the invention has the advantages that the impact force of liquid in the valve is borne by the clamping ring 5 clamped in the groove 21, the strength is higher, and the pressure resistance at the port of the valve body 2 is improved; and the snap ring 5 that the upper end cover plate 3 will bear the impact force of liquid is locked in the groove 21 by a mechanical mode, and can not break away from or loosen even in long-term use, so that the reliability is high and the service life is long.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A ball valve comprises a valve ball, a valve body and an upper end cover plate, and is characterized in that a valve shaft is constructed on the valve ball, the ball valve also comprises a sealing cover plate and a clamping ring, and the sealing cover plate and the upper end cover plate are fixedly connected and are both installed at a port of the valve body; the sealing cover plate is abutted against the root part of the valve shaft; the inner wall of the valve body is provided with a groove, the clamping ring is clamped in the groove, and the part of the clamping ring exposed out of the groove is clamped between the upper end cover plate and the sealing cover plate.
2. The ball valve of claim 1, wherein the valve body is circumferentially fixed to the outer wall of the upper end cover plate by a stopper groove and a stopper block that are fitted to each other.
3. The ball valve according to claim 2, wherein the limiting grooves comprise a plurality of limiting grooves, and the plurality of limiting grooves are uniformly distributed on the valve body along the circumferential direction of the valve body.
4. The ball valve of claim 1, wherein the snap ring comprises at least three segments of rings connected end to end in series.
5. The ball valve of claim 4, wherein two end surfaces of at least a segment of the ring body are parallel to a diameter of the snap ring.
6. The ball valve according to claim 1, wherein a first step surface is provided on a side of the upper end cover plate adjacent to the sealing cover plate, and a portion of the retainer ring exposed to the groove abuts against the first step surface.
7. The ball valve according to claim 6, wherein the port of the valve body is provided with an annular groove, and a flange is provided along a circumferential direction of the upper end cover plate, and the flange is received in the annular groove.
8. The ball valve according to claim 1, wherein a clamping block is protruded from a side of the sealing cover plate away from the ball valve, and a clamping groove is formed in a side of the upper end cover plate facing the ball valve, and the clamping block is clamped in the clamping groove.
9. The ball valve according to claim 1, wherein the valve shaft is a stepped shaft, and a through hole for passing the stepped shaft is provided in a middle portion of the sealing cover plate.
10. A method of assembling a ball valve, comprising the steps of:
step S10, installing the valve ball with the valve shaft into the valve body, and clamping and fixing the sealing cover plate at the port of the valve body;
step S20, respectively installing each ring body of a clamping ring into a groove on the valve body, wherein one side of the clamping ring is abutted against one side of the sealing cover plate far away from the valve ball;
step S30, mounting an upper end cover plate at the port of the valve body, wherein the upper end cover plate is pressed on the snap ring towards one side of the valve ball, and the upper end cover plate is clamped and matched with a limiting block and a limiting groove on the valve body;
and step S40, fixedly connecting the upper end cover plate with the sealing cover plate by adopting a fastener.
CN202010270931.9A 2020-04-08 2020-04-08 Ball valve and assembling method thereof Pending CN111503304A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010270931.9A CN111503304A (en) 2020-04-08 2020-04-08 Ball valve and assembling method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010270931.9A CN111503304A (en) 2020-04-08 2020-04-08 Ball valve and assembling method thereof

Publications (1)

Publication Number Publication Date
CN111503304A true CN111503304A (en) 2020-08-07

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ID=71869086

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010270931.9A Pending CN111503304A (en) 2020-04-08 2020-04-08 Ball valve and assembling method thereof

Country Status (1)

Country Link
CN (1) CN111503304A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111998089A (en) * 2020-08-20 2020-11-27 永嘉赛孚阀门有限公司 High-temperature hard sealing ball valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111998089A (en) * 2020-08-20 2020-11-27 永嘉赛孚阀门有限公司 High-temperature hard sealing ball valve

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