CN213512096U - Low-pressure fluid color-changing valve - Google Patents

Abstract

The utility model relates to a low-pressure fluid color changing valve, which comprises a valve body, wherein the valve body is provided with a connecting port for connecting a fluid pipeline and a valve body through hole communicated with the connecting port, and a valve seat is detachably and hermetically connected in the valve body through hole; the valve seat is provided with valve seat through holes which penetrate through two ends of the valve seat, and the valve seat through holes are coaxial with and communicated with the valve body through holes; a valve rod is arranged in the through hole of the valve seat; one end of the valve rod is a valve end, and the other end of the valve rod is a driving end; the valve end penetrates through the valve seat through hole to extend into the valve body through hole, a sealing assembly communicated with the connecting port and sleeved on the valve rod is arranged between the hole wall of the valve body through hole and the valve end, a piston assembly sleeved on the valve rod is arranged between the driving end and the hole wall of the valve seat through hole, and an elastic assembly located between the sealing assembly and the piston assembly is further sleeved on the valve rod. The utility model discloses a compact structure, easy dismounting does not need very big packing force just can realize fine sealed, has been convenient for the use, the installation, the maintenance of product.

Description

Low-pressure fluid color-changing valve

Technical Field

The utility model belongs to the technical field of trade the look valve and specifically relates to a low pressure fluid trades look valve.

Background

In the prior art, a large number of fluid pipelines need to be disassembled for maintenance and replacement of the low-pressure fluid color changing valve, and a plurality of disassembling tools are needed to assist maintenance of the low-pressure fluid valve, so that enough space needs to be reserved to meet the use of tools, and on the other hand, a large amount of working hours need to be spent when the fluid pipelines are disassembled, so that the volume of equipment is increased invisibly, and the time cost of equipment maintenance is increased. Meanwhile, the existing low-pressure fluid color changing valve adopts a pressure extrusion type sealing mode in the sealing aspect, sealing materials are mostly made of plastic materials, the pre-tightening force of installation needs to be controlled well in the installation process, the plastic materials are crushed due to the overlarge pre-tightening force, sealing failure can be caused due to the fact that the pre-tightening force is insufficient, and the working difficulty and the equipment failure rate are increased in the installation and maintenance processes of equipment.

SUMMERY OF THE UTILITY MODEL

To present not enough, the utility model provides a low pressure fluid trades look valve easy to assemble maintenance, sealed good.

The utility model provides a technical scheme that its technical problem adopted is: a low-pressure fluid color changing valve comprises a valve body, wherein a connecting port for connecting a fluid pipeline is arranged on the valve body, and a valve body through hole communicated with the connecting port is also arranged on the valve body; one end of the valve body in the through hole of the valve body is detachably and hermetically connected with a valve seat; the valve seat is provided with a valve seat through hole penetrating through two ends of the valve seat, and the valve seat through hole is coaxial with and communicated with the valve body through hole; a valve rod which moves back and forth along the axial direction of the valve seat through hole is arranged in the valve seat through hole; one end of the valve rod is a valve end for conducting or closing the fluid channel, and the other end of the valve rod is a driving end driven by air; the valve end penetrates through the valve seat through hole and extends into the other end of the valve body through hole, a sealing assembly communicated with the connecting port is arranged between the hole wall of the valve body through hole and the valve end, and the sealing assembly is sleeved on the valve rod and is in dynamic abutting joint with the valve end; a piston assembly fixedly sleeved on the valve rod is arranged between the driving end and the hole wall of the valve seat through hole, and an elastic assembly located between the sealing assembly and the piston assembly is further sleeved on the valve rod.

Preferably, the piston assembly comprises a piston pressing sheet, a piston sheet and a piston supporting sheet which are sleeved on the valve rod and are sequentially stacked, the piston sheet is a piston which can generate elastic deformation and has a flat-bottom bowl-shaped structure, the diameter of the piston sheet is slightly larger than the aperture of the through hole of the valve seat, and the piston pressing sheet and the piston supporting sheet are fixedly sleeved on the valve rod; the elastic component is pressed against the piston supporting plate and is respectively arranged on two opposite surfaces of the piston supporting plate with the piston plate.

Preferably, the open end of the piston disc bowl faces the drive end of the valve stem.

Preferably, the elastic component comprises a spring support, a first spring and a second spring which are arranged in the through hole of the valve seat in a sliding manner; the spring support is sleeved on the valve rod and is connected with the sealing component on the surface of the valve rod facing the valve end of the valve rod; the second spring is sleeved on the valve rod, and two ends of the second spring are correspondingly connected with the spring support and the piston assembly; the first spring is sleeved outside the second spring, one end of the first spring is connected with the spring support, the other end of the first spring is connected with an extension arm which extends inwards along the radial direction of the valve seat through hole on the side wall of the valve seat through hole, and the extension arm is arranged at a position corresponding to the position between the piston assembly and the spring support.

Preferably, the seal assembly comprises a fluid chamber for storing fluid, an annular valve port gasket; the fluid chamber is a component which is matched and hermetically arranged in the through hole of the valve body, the front end of the fluid chamber corresponds to the valve end of the valve rod, and the fluid chamber is provided with a transverse through hole which is coaxial with the through hole of the valve body and a vertical through hole which is communicated with the transverse through hole and the connecting port; the end part of the valve end of the valve rod is of a conical structure, the valve end penetrates out of the transverse through hole, and a valve port sealing gasket is sleeved on the conical side wall of the valve end; the valve port sealing gasket is fixedly and hermetically connected to the end part of the front end of the fluid chamber, the outer wall of the front end of the fluid chamber is also provided with a first sealing ring which is simultaneously abutted with the hole wall of the through hole of the valve body and the valve port sealing gasket, and the outer wall of the rear end is provided with a second sealing ring which is abutted with the hole wall of the through hole of the valve body; the fluid chamber is connected with a guide sleeve in a sealing mode at the port of the rear-end transverse through hole, the guide sleeve is sleeved on the valve rod in a matching mode and is connected with the elastic assembly at one end, far away from the fluid chamber, of the guide sleeve.

Preferably, the connecting port is provided with a fluid pipeline joint which is detachably and hermetically connected with the valve body.

Preferably, the valve seat and the valve body are detachably and hermetically connected through a threaded structure.

Preferably, a cylinder cover is further arranged at a port, corresponding to the driving end of the valve rod, of the valve seat through hole on the valve seat, and the cylinder cover is connected with the valve seat in a sealing mode through a third sealing ring arranged between the cylinder cover and the inner wall of the valve seat through hole; and the cylinder cover is provided with an air pipe quick connector communicated with the valve seat through hole.

The beneficial effects of the utility model reside in that: the utility model discloses a mode setting valve body and disk seat adoption detachable sealing connection, the valve body is that the inside of simple structure sets up the cavity structure that the cavity is the valve body through-hole promptly, and valve rod and corresponding sealing member and other parts all set up on the disk seat, when fluid flow is not smooth or when sealed the emergence problem in the valve body, all can be very convenient carry out dismouting maintenance, whole compact structure, can realize the miniaturized design of product, need not occupy too big space, easy dismounting, do not need very big packing force just can realize fine sealing, the use of product has been convenient for, the installation, the maintenance.

Drawings

FIG. 1 is a schematic sectional view of an embodiment of the present invention;

FIG. 2 is a schematic structural view of the valve body and the valve seat according to the embodiment of the present invention after being assembled;

FIG. 3 is a schematic diagram of a valve body and a valve seat separated according to an embodiment of the present invention;

part names and serial numbers in the figure: 1-valve body 10-connecting port 11-valve body through hole 100-fluid pipeline joint 2-valve seat 20-valve seat through hole 21-cylinder head 200-extension arm 201-third sealing ring 202-air pipe quick connector 3-valve rod 30-valve end 31-driving end 4-sealing component 40-fluid chamber 41-valve port sealing gasket 400 transverse through hole 401-vertical through hole 5-piston component 50-piston pressing sheet 51-piston sheet 52-piston supporting sheet 6-elastic component 60-spring support 61-first spring 62-second spring 7-first sealing ring 8-second sealing ring 9-guide sleeve.

Detailed Description

To clearly illustrate the objects, technical solutions and advantages of the embodiments of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, which are clearly and completely described below. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention. Furthermore, directional terms as referred to in the present disclosure, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., refer only to the direction of the attached drawings, and directional terms used are intended to better and more clearly illustrate and understand the present invention rather than to indicate or imply the orientation the present invention must have, and therefore should not be construed as limiting the present invention.

The embodiment of the present invention is shown in fig. 1 to fig. 3, a low-pressure fluid color-changing valve, which comprises a valve body 1, wherein a connection port 10 for connecting a fluid pipeline is arranged on the valve body 1, the fluid pipeline can be connected through the connection port 10 arranged thereon, the fluid pipeline can be directly and hermetically connected to the valve body, and a fluid pipeline joint 100 detachably and hermetically connected to the valve body is arranged on the connection port 10 for convenient connection and universality of the connection port, so that the standardization of the structure of the connection port 10 can be maintained, the production is convenient, when different fluid pipelines are connected, only the pipeline joint needs to be replaced, and the use is more convenient; the valve body 1 is also provided with a valve body through hole 11 communicated with the connecting port 10, the valve body through hole 11 can be used as a part of a fluid flow channel, and other parts can be arranged in the valve body through hole 11, one end of the valve body 1 in the valve body through hole 11 is detachably and hermetically connected with a valve seat 2, namely, the connection between the valve seat 2 and the valve body 1 is detachable, and the valve seat 2 and the valve body 1 are sealed when the valve body 1 and the valve body are installed together, so that the valve body 1 can be detached and sealed, has a simple and compact structure, can be conveniently detached and maintained when the fluid flows unsmoothly in the valve body or is sealed, can realize the miniaturization design of a product, does not need to occupy too large space, and is convenient to detach and install; the detachable connection mode between the valve seat and the valve body is detachable and hermetically connected through a threaded structure, namely, an external thread is arranged on the outer wall of the valve seat 2, and an internal thread is arranged on the hole wall of the valve body through hole 11, so that the threaded connection is convenient and simple, and the disassembly and the assembly are easy; the valve seat 2 is provided with valve seat through holes 20 penetrating through two ends of the valve seat 2, and the valve seat through holes 20 are coaxial with and communicated with the valve body through holes 11, so that the axis of the valve seat through hole 20 and the axis of the valve body through hole 11 are the same axis, and the two through holes are in the same direction; the valve rod 3 which moves back and forth along the axial direction of the valve seat through hole 20 is arranged in the valve seat through hole 20, namely, the valve rod 3 moves back and forth in the valve seat through hole 20, and a channel for the upper fluid flow of the color changing valve can be opened or closed through the movement of the valve rod 3; one end of the valve rod 3 is a valve end 30 for opening or closing a fluid channel, and the other end is a driving end 31 driven by air; the valve end 30 penetrates through the valve seat through hole 20 and extends into the other end of the valve body through hole 11, a sealing component 4 communicated with the connecting port 10 is arranged between the hole wall of the valve body through hole 11 and the valve end 30, and the sealing component 4 is sleeved on the valve rod 3 and is in dynamic abutting joint with the valve end 30; thus, a sealed cavity which can be entered by fluid is formed among the valve rod 3, the valve body 1 and the connecting port 10 through the sealing component 4, the sealed cavity is formed by the valve rod 3, the sealing component 4 and the valve body 1 together, the connecting port 10 is communicated with the sealing component 4, the fluid can easily enter the sealed cavity through the connecting port 10, the sealing component 4 is in dynamic abutting contact with the valve end 30 of the valve rod 3, which means that the abutting contact between the sealing component 4 and the valve end 30 of the valve rod 3 is controlled by external force, when the valve rod 3 is not in a static state under the action of the external force, the valve end 30 of the valve rod 3 and the sealing component 4 are in abutting contact, at the moment, the sealed cavity formed by the valve rod 3, the sealing component 4 and the valve body 1 has no connecting port outlet except for the inlet end 10, the fluid entering the sealed space is limited in the sealed cavity, and when the valve rod 3 moves to the through hole 11 of the valve body under the action, the seal assembly 4 and the valve end 30 are in a spaced apart condition to define a sealed cavity outlet from which fluid in the sealed cavity can flow; the valve rod 3 is further sleeved with an elastic component 6 which is positioned between the sealing component 4 and the piston component 5, so that air enters the valve seat through hole 20 through the piston component 5 and then applies thrust to the piston component 5, further thrust is applied to the valve rod 3, the outward movement of the valve rod 3 is promoted, meanwhile, the elastic component 6 is compressed, after the acting force of the outward movement of the valve rod 3 disappears, the valve rod returns to the state of being abutted against the sealing component 4 under the action of the elastic component 6, and therefore good sealing can be achieved without large pressing force, and the use, installation and maintenance of products are facilitated.

Further improvement, as shown in fig. 1, the piston assembly 5 includes a piston pressing plate 50, a piston plate 51, and a piston support plate 52, which are sequentially stacked and sleeved on the valve rod 3, the piston plate 51 is a piston with a flat-bottom bowl-shaped structure capable of generating elastic deformation and having a diameter slightly larger than the aperture of the valve seat through hole 20, the piston pressing plate 50 and the piston support plate 52 are fixedly sleeved on the valve rod 3, the valve rod 3 penetrates out from the middle of the bowl bottom of the flat-bottom bowl-shaped piston plate 51, the side wall of the bowl-shaped structure of the piston plate 51 is pressed against the hole wall of the valve seat through hole 20, so that the piston pressing plate 50 and the piston support plate 52 are in full contact with the hole wall of the valve seat through hole 20, the elastic deformation thereof makes the contact with the hole wall of the valve seat through hole 20 in a sealing state, and the piston pressing plate 50 and the piston support plate 52 fix the sleeved position of the piston plate 51 on the valve rod 3, thereby driving the valve rod 3 to move; in order to enable the force applied to the piston plate 51 to be better transmitted to the valve rod 3, the open end of the bowl-shaped structure of the piston plate 51 faces the drive end 31 of the valve rod 3, and the side wall of the bowl-shaped structure of the piston plate 51 forms a guide surface for the air flow, so that the force is better transmitted to the valve rod 3; the elastic component 6 is pressed against the piston support plate 52 and is positioned on two opposite surfaces of the piston support plate 52 relative to the piston plate 51, which is more beneficial to the layout of each component in the valve seat through hole 20, so that the structure is compact and simple.

In a further improvement, as shown in fig. 1, the elastic assembly 6 comprises a spring seat 60, a first spring 61, a second spring 62; the spring support 60 is sleeved on the valve rod 3 and is connected with the sealing component 4 on the surface of the spring support facing the valve end 30 of the valve rod 3, so that two springs are limited to move between the piston component 5 and the spring support 60, and the influence of the springs on the sealing component 4 is avoided; the second spring 62 is sleeved on the valve rod, and two ends of the second spring are correspondingly connected with the spring support 60 and the piston assembly 5; the first spring 61 is sleeved outside the second spring 62, one end of the first spring 61 is connected with the spring support 60, the other end of the first spring is connected with an extension arm 200 which extends inwards along the radial direction of the valve seat through hole 20 on the side wall of the valve seat through hole 20, the extension arm 200 is arranged at a position corresponding to the position between the piston assembly 5 and the spring support 60, namely, the two springs are coaxially sleeved on the valve rod 3, the first spring 61 is outside, the second spring 62 is inside, the extension arm 200 is arranged so that the compressible stroke of the second spring 62 is larger than the compressible stroke of the first spring 61, at the moment, the first spring 61 plays a role of supporting the sealing assembly 4 to realize sealing, and the second spring 62 plays a role of recovering the initial state of the valve rod 3 after the valve rod 3 moves, namely closing; in this case, the first spring 61 may be a thick spring and the second spring 62 may be a thin spring corresponding to the two springs, so that the respective functions can be better exerted.

In a further improvement, as shown in fig. 1 and 3, the sealing assembly 4 includes a fluid chamber 40 for storing fluid, an annular valve port gasket 41, the fluid chamber 40 is used as a cavity for fluid to enter, and the sealing of the fluid chamber 40 is realized by the valve stem 3, the valve port gasket 41 and the guide sleeve 9; the fluid chamber 40 is a component which is matched and hermetically installed in the valve body through hole 11, the front end of the component corresponds to the valve end 30 of the valve rod 3, a transverse through hole 400 which is coaxial with the valve body through hole 11 and a vertical through hole 401 which is communicated with the transverse through hole 400 and the connecting port 10 are arranged on the fluid chamber 40, the matching installation of the fluid chamber 40 in the valve body through hole 11 means that the outer diameter of the fluid chamber 40 is not larger than the aperture of the valve body through hole 11, the transverse through hole 400 is used for enabling the valve rod 3 to penetrate and form dynamic pressure contact with the valve rod 3, and the vertical through hole 401 is used for communicating with the connecting port 10 to enable fluid to enter the fluid chamber 40; the end of the valve end 30 of the valve rod 3 is of a tapered structure, the valve end 30 penetrates out of the transverse through hole 400, and the valve port sealing gasket 41 is sleeved on the tapered side wall of the valve end 30, that is, the valve port sealing gasket 41 is sleeved on the valve rod 3 corresponding to the side wall of the tapered structure of the valve end 30, which means that the inner wall of the annular structure of the valve port sealing gasket 41 is also tapered, and the valve rod 3 and the valve port sealing gasket 41 form a fluid outflow channel with a small inlet and a large outlet; the valve port sealing gasket 41 is fixedly and hermetically connected with the end part of the front end of the fluid chamber 40, the valve port sealing gasket 41 cannot be driven to move together when the valve rod 3 moves, the outer wall of the front end of the fluid chamber 40 is also provided with a first sealing ring 7 which is simultaneously abutted against the hole wall of the valve body through hole 11 and the valve port sealing gasket 41, and the outer wall of the rear end is provided with a second sealing ring 8 which is abutted against the hole wall of the valve body through hole 11, so that the fluid chamber 40 and the hole wall of the valve body through hole 11 are well sealed by the two sealing rings at the front end and the rear end, excessive pressing force is not needed, and good sealing is performed on a sealing cavity formed; fluid chamber 40 still sealing connection has uide bushing 9 in the port department of rear end horizontal through-hole 400, uide bushing 9 matches the cover and establishes on valve rod 3 and is connected with elastic component 6 at its one end of keeping away from fluid chamber 40, has just carried out good sealing between valve rod 3 and the fluid chamber 40, and does not influence the motion of valve rod 3 moreover, simple structure is compact.

In a further improvement, as shown in fig. 1 to 3, a cylinder cover 21 is further arranged on the valve seat 2 at a port of the valve seat through hole 20 corresponding to the driving end 31 of the valve rod 3, and the cylinder cover 21 is connected with the valve seat 2 in a sealing manner through a third sealing ring 201 arranged between the cylinder cover 21 and the inner wall of the valve seat through hole 20; the cylinder cover 21 is provided with the air pipe quick-plugging connector 202 communicated with the valve seat through hole 20, the air pipe quick-plugging connector 202 can be conveniently and quickly connected and communicated with an external air flow source, the use is more convenient, the air flow entering the valve seat through hole 20 can be better compressed by the arrangement of the cylinder cover 21, the acting force is exerted on the piston assembly 5, the third sealing ring 201 avoids the leakage of the air flow, and the compressed air can be better.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims (8)

1. A low pressure fluid trades look valve which characterized in that: the valve comprises a valve body, wherein a connecting port for connecting a fluid pipeline is arranged on the valve body, and a valve body through hole communicated with the connecting port is also arranged on the valve body; one end of the valve body in the through hole of the valve body is detachably and hermetically connected with a valve seat; the valve seat is provided with a valve seat through hole penetrating through two ends of the valve seat, and the valve seat through hole is coaxial with and communicated with the valve body through hole; a valve rod which moves back and forth along the axial direction of the valve seat through hole is arranged in the valve seat through hole; one end of the valve rod is a valve end for conducting or closing the fluid channel, and the other end of the valve rod is a driving end driven by air; the valve end penetrates through the valve seat through hole and extends into the other end of the valve body through hole, a sealing assembly communicated with the connecting port is arranged between the hole wall of the valve body through hole and the valve end, and the sealing assembly is sleeved on the valve rod and is in dynamic abutting joint with the valve end; a piston assembly fixedly sleeved on the valve rod is arranged between the driving end and the hole wall of the valve seat through hole, and an elastic assembly located between the sealing assembly and the piston assembly is further sleeved on the valve rod.

2. The low-pressure fluid color changing valve according to claim 1, wherein the piston assembly comprises a piston pressing plate, a piston plate and a piston supporting plate which are sleeved on the valve rod and are sequentially stacked, the piston plate is a piston with a flat-bottom bowl-shaped structure which can generate elastic deformation and has a diameter slightly larger than the aperture of the through hole of the valve seat, and the piston pressing plate and the piston supporting plate are fixedly sleeved on the valve rod; the elastic component is pressed against the piston supporting plate and is respectively arranged on two opposite surfaces of the piston supporting plate with the piston plate.

3. The low pressure fluid color changing valve of claim 2, wherein the open end of the piston plate bowl is directed toward the drive end of the valve stem.

4. The low pressure fluid color changing valve of claim 1, wherein the elastic assembly comprises a spring support slidably disposed in the through hole of the valve seat, a first spring, a second spring; the spring support is sleeved on the valve rod and is connected with the sealing component on the surface of the valve rod facing the valve end of the valve rod; the second spring is sleeved on the valve rod, and two ends of the second spring are correspondingly connected with the spring support and the piston assembly; the first spring is sleeved outside the second spring, one end of the first spring is connected with the spring support, the other end of the first spring is connected with an extension arm which extends inwards along the radial direction of the valve seat through hole on the side wall of the valve seat through hole, and the extension arm is arranged at a position corresponding to the position between the piston assembly and the spring support.

5. The low pressure fluid color changing valve according to claim 1, wherein the sealing assembly comprises a fluid chamber for storing fluid, an annular valve port gasket; the fluid chamber is a component which is matched and hermetically arranged in the through hole of the valve body, the front end of the fluid chamber corresponds to the valve end of the valve rod, and the fluid chamber is provided with a transverse through hole which is coaxial with the through hole of the valve body and a vertical through hole which is communicated with the transverse through hole and the connecting port; the end part of the valve end of the valve rod is of a conical structure, the valve end penetrates out of the transverse through hole, and a valve port sealing gasket is sleeved on the conical side wall of the valve end; the valve port sealing gasket is fixedly and hermetically connected to the end part of the front end of the fluid chamber, the outer wall of the front end of the fluid chamber is also provided with a first sealing ring which is simultaneously abutted with the hole wall of the through hole of the valve body and the valve port sealing gasket, and the outer wall of the rear end is provided with a second sealing ring which is abutted with the hole wall of the through hole of the valve body; the fluid chamber is connected with a guide sleeve in a sealing mode at the port of the rear-end transverse through hole, the guide sleeve is sleeved on the valve rod in a matching mode and is connected with the elastic assembly at one end, far away from the fluid chamber, of the guide sleeve.

6. The low pressure fluid color change valve of claim 1, wherein: and the connecting port is provided with a fluid pipeline joint which is detachably and hermetically connected with the valve body.

7. The low pressure fluid color change valve of claim 1, wherein: the valve seat and the valve body are in detachable and sealing connection through a threaded structure.

8. The low-pressure fluid color changing valve according to claim 1, wherein a cylinder cover is further arranged on the valve seat at a port of the valve seat through hole corresponding to the driving end of the valve rod, and the cylinder cover is connected with the valve seat in a sealing manner through a third sealing ring arranged between the cylinder cover and the inner wall of the valve seat through hole; and the cylinder cover is provided with an air pipe quick connector communicated with the valve seat through hole.

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