Corrugated pipe combined sealing ball valve

Abstract

The utility model discloses a corrugated pipe combined sealing ball valve, and relates to the technical field of ball valves. The ball valve comprises a ball shell, a valve element, a valve seat assembly, a shaft sleeve and a valve rod, the upper portion of the peripheral side of the ball shell is fixedly communicated with the shaft sleeve, a second corrugated pipe is fixed to the top end in the shaft sleeve, an inner sealing ring is fixed to each protrusion of the inner ring of the second corrugated pipe, and the valve rod is jointly and movably connected into all the inner sealing rings. Conveying pipes are symmetrically and fixedly communicated with the surface of the spherical shell, valve seat assemblies are fixed to the edges, close to the spherical shell, of the inner walls of the two conveying pipes, each valve seat assembly comprises a fixing ring and a flexible sealing sleeve, and the flexible sealing sleeves are fixed to the edges of the inner ring and the outer ring, close to one end face of the spherical shell, of the fixing ring. By arranging the ball shell, the valve element, the valve seat assembly, the shaft sleeve and the valve rod, the problems that when the ball valve works, a corrugated pipe on the inner valve seat is prone to being eroded by passing fluid, and the sealing performance between the valve rod and the ball shell is not good enough are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of ball valve, especially a kind of ball valve of corrugated pipe combination sealing. BACKGROUND

[0002] Corrugated pipe combination sealing ball valve is a kind of valve using corrugated pipe sealing technology on the basis of ball valve, when ball valve is in closed state, ball and valve seat are in close contact, form sealing surface, prevent the flow of medium, corrugated pipe plays the role of auxiliary sealing at this time, its elastic force makes the sealing between ball and valve seat more closely, when ball valve needs to be opened, by operating valve stem, ball rotates, medium can pass through ball valve, in this process, corrugated pipe will be elastically deformed with the movement of ball, but always keep sealed state, but it still has the following problems in actual use:

[0003] In the process of ball valve work, valve seat is used to enhance the sealing effect of corrugated pipe, corrugated pipe is directly arranged in ball valve and contacts with fluid in ball valve in work, with use, corrugated pipe is easily eroded by fluid, causes damage, affects sealing effect;

[0004] When valve stem and handle on ball valve are installed together, rotate handle, drive valve stem and valve core to rotate, the opening and closing state of ball valve can be changed, but valve stem passes through ball valve inside and outside as a whole, and its sealing is sealed by sealing ring, ball valve is easy to leak at the position of valve stem. UTILITY MODEL CONTENTS

[0005] To solve the above technical defects, the utility model aims at providing a kind of ball valve of corrugated pipe combination sealing, by setting up ball shell, valve core, valve seat assembly, shaft sleeve and valve stem, solve the problem that internal valve seat on ball valve is easily eroded by fluid in work, and the sealing between valve stem and ball shell is not good enough.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: a ball valve with a bellows combination seal, comprising a ball shell, a valve core, a valve seat assembly, a bushing, and a valve stem. The upper circumference of the ball shell is fixedly connected to the bushing. A second bellows is fixed to the top of the bushing. Each protrusion of the inner ring of the second bellows is fixed with an inner sealing ring. A valve stem is movably connected within all the inner sealing rings. The valve core is movably connected inside the ball shell. A delivery pipe is symmetrically fixedly connected to the surface of the ball shell. The central axes of the two delivery pipes are on the same straight line. Each of the aforementioned conveying pipes has a valve seat assembly fixed to the edge of the ball shell near the inner wall. The valve seat assembly includes a fixing ring and a flexible sealing sleeve. The fixing ring is fixed to the inner wall of the conveying pipe, and the flexible sealing sleeve is fixed to the inner and outer ring edges of the fixing ring near one end face of the ball shell. During operation, the valve core is fixed in the ball shell. As the valve core rotates, the opening and closing state of the ball valve is changed. When the ball valve is in the fully open and fully closed state, the valve seat assembly seals the gap between the ball shell and the valve core. The bushing movably connects the valve stem in the bushing. As the valve stem rotates, it drives the valve core to rotate.

[0007] Furthermore, the valve seat assembly also includes a bellows and a sealing ring. The two flexible sealing sleeves fixed on the same fixed ring have a sealing ring fixed at their ends away from the fixed ring. The bellows is fixed at the ends of the sealing ring and the fixed ring that are close to each other. The bellows is positioned between the two flexible sealing sleeves. The bellows pushes the sealing ring to press against the valve core. The bellows is closed by the sealing ring and the fixed ring and the two flexible sealing sleeves.

[0008] The valve core has a socket at the top center, and both sealing rings abut against the surface of the valve core. When the valve core is in operation, the socket on it is movably connected to the pin block.

[0009] A pressure plate is fixed to the bottom end of the second bellows. The pressure plate is movably connected inside the bushing and is located on the periphery of the valve stem. The pressure plate abuts against the top of the valve core. An outer sealing ring is fixed on the outer ring protrusion of the second bellows. The outer sealing ring is movably connected inside the bushing. The pressure plate on the bellows presses against the top of the valve core, providing abutment for the bellows.

[0010] A pin is fixed to the bottom end of the valve stem. The bottom end of the valve stem is located inside the ball shell, and the pin is movably connected to the socket. When the valve stem rotates, the pin drives the valve core to rotate.

[0011] The bushing has a movable hole at the center of its top end, and a mounting block is fixed at the center of the top end of the valve stem. The top end of the valve stem abuts against the inner top of the bushing, and the mounting block passes through the movable hole and extends out of the top end of the bushing. After the mounting block is installed with the valve handle, the valve stem can be rotated by turning the handle.

[0012] This utility model has the following beneficial effects:

[0013] By setting the ball shell, valve core and valve seat assembly, the problem that the corrugated pipe on the internal valve seat is easily eroded by the fluid passing through in the work of the ball valve is solved, the gap between the valve core and the ball shell is closed when the valve core is in the fully open state and the fully closed state, the inner ring and the outer ring of the corrugated pipe are closed by the flexible sealing sleeve between the fixing ring and the sealing ring when the corrugated pipe works, the erosion of the fluid passing through the ball valve to the corrugated pipe is prevented, so that the corrugated pipe on the internal valve seat is not eroded by the fluid in the work of the ball valve.

[0014] By setting the ball shell, valve core, shaft sleeve and valve stem, the problem that the sealing between the valve stem and the ball shell is not good enough in the work of the ball valve is solved, the corrugated pipe two is extruded in the shaft sleeve during the whole work process of the valve stem, the outer sealing ring on the outer ring is pressed tightly with the inner wall of the shaft sleeve and the inner sealing ring on the inner ring is pressed tightly with the peripheral side of the valve stem during the extrusion process, multiple sealing is provided between the valve stem and the shaft sleeve, the sealing strength between the valve stem and the shaft sleeve is increased, and the valve stem and the shaft sleeve are completely sealed. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0016] Figure 1 It is a structure schematic view of the present application after being partially cut open.

[0017] Figure 2 It is a structure perspective view of the ball shell;

[0018] Figure 3 It is a structure perspective view of the valve core;

[0019] Figure 4 It is a structure perspective view of the valve seat assembly after being partially cut open;

[0020] Figure 5 It is a structure perspective view of the shaft sleeve after being partially cut open;

[0021] Figure 6 It is a structure perspective view of the valve stem;

[0022] Figure 7 It is a structure perspective view of a ball valve assembly structure of a corrugated pipe combined sealing.

[0023] ATTACHMENT Figures 1-7In the figure, 1, spherical shell; 101, conveying pipe; 2, valve core; 201, socket; 3, valve seat assembly; 301, fixed ring; 302, flexible sealing sleeve; 303, bellows one; 304, sealing ring; 4, shaft sleeve; 401, movable hole; 402, pressure plate; 403, bellows two; 404, outer sealing ring; 405, inner sealing ring; 5, valve stem; 501, pin block; 502, mounting block. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model. Embodiment one

[0026] Please refer to Figures 1-4 The utility model discloses a kind of ball valves of bellows combination sealing, including spherical shell 1, valve core 2, valve seat assembly 3, shaft sleeve 4 and valve stem 5, the upper portion of the lateral side of spherical shell 1 is fixedly connected with shaft sleeve 4, spherical shell 1 will valve core 2 be movably arranged in it, shaft sleeve 4 will valve stem 5 be movably connected in it, the inner top of shaft sleeve 4 is fixed with bellows two 403, bellows two 403 will inner sealing ring 405 and outer sealing ring 404 be fixed on it, every protrusion on the inner ring of bellows two 403 is fixed with inner sealing ring 405, inner sealing ring 405 cooperates bellows two 403 to form several sealed spaces on the lateral side of valve stem 5, increase sealing effect, all inner sealing ring 405 are movably connected with valve stem 5, valve stem 5 is rotated, drive valve core 2 rotation, change the opening and closing of valve, spherical shell 1 is movably connected with valve core 2, valve core 2 is rotated, control the communication and mutual closure between two conveying pipes 101, the surface of spherical shell 1 is fixedly connected with conveying pipe 101 symmetrically, conveying pipe 101 will be fixed in valve seat assembly 3, and fluid is conveyed through entire ball valve, the central axis of two conveying pipes 101 is on same straight line, the edge of the inner wall of two conveying pipes 101 close to spherical shell 1 is fixed with valve seat assembly 3, valve seat assembly 3 will be closed between spherical shell 1 and valve core 2 Gap, prevent leakage after valve is closed, valve seat assembly 3 includes fixed ring 301 and flexible sealing sleeve 302, fixed ring 301 is fixed on the inner wall of conveying pipe 101, and the inner ring and the outer ring edge of fixed ring 301 close to the end surface of spherical shell 1 are all fixed with flexible sealing sleeve 302, fixed ring 301 will be fixed on flexible sealing sleeve 302, and bellows one 303 is closed in it by flexible sealing sleeve 302.

[0027] Specifically, the valve seat assembly 3 further comprises a bellows 303 and a sealing ring 304, the two flexible sealing sleeves 302 fixed on the same fixing ring 301 have the sealing ring 304 fixed at the end away from the fixing ring 301, the sealing ring 304 and the fixing ring 301 have the bellows 303 fixed at the end close to each other, and the bellows 303 is arranged between the two flexible sealing sleeves 302. During the operation of the valve seat assembly 3, the bellows 303 generates elastic force to push the sealing ring 304 to abut against the surface of the valve core 2.

[0028] Further, the valve core 2 has a socket 201 formed at the top center, the two sealing rings 304 abut against the surface of the valve core 2, and the socket 201 on the valve core 2 is used to movably connect the pin block 501. When the valve core 2 controls the ball valve to be in the open or closed state, the sealing ring 304 seals the gap between the valve core 2 and the ball shell 1.

[0029] The operation process of the embodiment is as follows: during the operation, the valve core 2 rotates in the ball shell 1. When the valve core 2 rotates to the fully open or fully closed state of the valve, the bellows 303 on the fixing ring 301 in the two delivery pipes 101 extrudes and pushes the sealing ring 304 to extrude on the valve core 2 in the ball shell 1. When the valve core 2 is in the fully open or fully closed state, the gap between the valve core 2 and the ball shell 1 is sealed. When the bellows 303 operates, the inner and outer circles are sealed by the flexible sealing sleeves 302 between the fixing ring 301 and the sealing ring 304, so as to prevent the fluid flowing through the ball valve from eroding the bellows 303. Specific embodiment two

[0031] Please refer to Figures 1-7 On the basis of the specific embodiment one, the bottom end of the bellows 403 is fixed with a pressure plate 402, the pressure plate 402 is movably connected in the shaft sleeve 4 and arranged on the side of the valve rod 5, the pressure plate 402 abuts against the top of the valve core 2, the outer circle of the bellows 403 is fixed with an outer sealing ring 404, the outer sealing ring 404 is movably connected in the shaft sleeve 4, the bellows 403 presses the pressure plate 402 on the valve core 2, extrudes the bellows 403, so that the inner sealing ring 405 on the inner circle of the bellows 403 and the valve rod 5 are extruded and sealed with each other, and the outer sealing ring 404 on the outer circle and the shaft sleeve 4 are extruded and sealed with each other, so as to increase the sealing effect between the shaft sleeve 4 and the valve rod 5.

[0032] Specifically, the bottom end of the valve rod 5 is fixed with a pin block 501, the bottom end of the valve rod 5 is arranged in the ball shell 1, and the pin block 501 is movably connected in the socket 201. During the operation of the valve rod 5, the pin block 501 is inserted into the socket 201 on the valve core 2, and the valve rod 5 drives the valve core 2 to rotate during rotation.

[0033] Further, the top end of the shaft sleeve 4 is centrally provided with a movable hole 401, the top end of the valve rod 5 is fixedly provided with a mounting block 502, the top end of the valve rod 5 abuts against the inner top of the shaft sleeve 4, and the mounting block 502 passes through the movable hole 401 and extends out of the top end of the shaft sleeve 4, the movable hole 401 on the shaft sleeve 4 is used for passing through the mounting block 502, after the mounting block 502 is connected with the handle of the ball valve, the handle is rotated to drive the valve rod 5 to rotate.

[0034] The operation process of the embodiment is as follows: in work, after the ball valve is installed on the external pipeline, the handle is installed with the mounting block 502, the handle is rotated to drive the mounting block 502 to rotate, and in the process of rotating the mounting block 502, the valve rod 5, the pin block 501 at the bottom end of the valve rod 5 and the valve core 2 are driven to rotate, the opening and closing state of the ball valve is changed, and in the whole working process of the valve rod 5, the pressure plate 402 is pressed against the top of the valve core 2, so that the corrugated pipe two 403 is extruded in the shaft sleeve 4, in the extrusion process, the corrugated pipe two 403 is extruded to the outer sealing ring 404 on the outer ring and the inner wall of the shaft sleeve 4 is pressed tightly, the inner sealing ring 405 on the inner ring is pressed tightly with the valve rod 5, and multiple sealing is provided between the valve rod 5 and the shaft sleeve 4, and the sealing strength between the valve rod 5 and the shaft sleeve 4 is increased.

[0035] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details, nor limit the application to the specific embodiments described. Obviously, according to the content of the specification, many modifications and changes can be made. The embodiments are selected and described in the specification in order to better explain the principles and practical application of the application, so that the persons skilled in the art can well understand and utilize the application. The application is limited by the claims and their entire scope and equivalents.

Claims

1. A corrugated pipe combined sealed ball valve, comprising a ball shell (1), a valve core (2), a valve seat assembly (3), a shaft sleeve (4) and a valve stem (5), characterized in that: The outer side upper part of the spherical shell (1) is fixedly connected with a shaft sleeve (4), the inner top end of the shaft sleeve (4) is fixedly connected with a bellows two (403), each protrusion of the inner ring of the bellows two (403) is fixedly connected with an inner sealing ring (405), all the inner sealing rings (405) are jointly movably connected with a valve rod (5), the spherical shell (1) is movably connected with a valve core (2), the surface of the spherical shell (1) is fixedly connected with a delivery pipe (101) in a symmetrical manner, the central axes of the two delivery pipes (101) are on the same straight line, the inner walls of the two delivery pipes (101) are fixedly connected with a valve seat assembly (3) near the edges of the spherical shell (1), the valve seat assembly (3) comprises a fixed ring (301) and a flexible sealing sleeve (302), the fixed ring (301) is fixed on the inner wall of the delivery pipe (101), and the fixed ring (301) is fixedly connected with the flexible sealing sleeve (302) near the inner ring and the outer ring edge of the one end surface of the spherical shell (1).

2. A corrugated tube combination sealed ball valve according to claim 1, characterized in that: The valve seat assembly (3) further comprises a bellows one (303) and a sealing ring (304), the two flexible sealing sleeves (302) fixed on the same fixed ring (301) are jointly fixed with the sealing ring (304) away from one end of the fixed ring (301), the sealing ring (304) and the fixed ring (301) are jointly fixed with the bellows one (303) on the end close to each other, and the bellows one (303) is arranged between the two flexible sealing sleeves (302).

3. A corrugated tube combination sealed ball valve according to claim 2, characterized in that: The top central part of the valve core (2) is provided with a socket (201), and the two sealing rings (304) abut on the surface of the valve core (2).

4. A corrugated tube combination sealed ball valve according to claim 1, characterized in that: The bottom end of the bellows two (403) is fixedly connected with a pressure plate (402), the pressure plate (402) is movably connected in the shaft sleeve (4) and arranged on the outer side of the valve rod (5), the pressure plate (402) abuts on the top of the valve core (2), the outer ring protrusions of the bellows two (403) are fixedly connected with an outer sealing ring (404), and the outer sealing ring (404) is movably connected in the shaft sleeve (4).

5. A corrugated tube combination sealed ball valve according to claim 3, characterized in that: The bottom end of the valve rod (5) is fixedly connected with a pin block (501), the bottom end of the valve rod (5) is arranged in the spherical shell (1), and the pin block (501) is movably connected in the socket (201).

6. A corrugated tube combination sealed ball valve according to claim 4, characterized in that: The top central part of the shaft sleeve (4) is provided with a movable hole (401), the top central part of the valve rod (5) is fixedly connected with a mounting block (502), the top end of the valve rod (5) abuts on the inner top of the shaft sleeve (4), and the mounting block (502) passes through the movable hole (401) and extends out of the top end of the shaft sleeve (4).

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