CN217108228U - Mechanical valve structure - Google Patents

Abstract

The utility model relates to the technical field of valves, especially, relate to a mechanical valve structure, include: the valve body is internally provided with an accommodating cavity, and at least one side of the accommodating cavity is communicated with the outside; the sealing assembly is fixed in the accommodating cavity and comprises a flat ring, the outer wall of the flat ring is in close contact with the inner wall of the accommodating cavity, and the flat ring is arranged in a hollow manner; the valve rod is arranged in the accommodating cavity in a sliding manner relative to the valve body and penetrates through the flat ring; the valve body is provided with a first channel and a second channel which are communicated with the accommodating cavity, and the first channel and the second channel are arranged on two sides of the sealing assembly; the valve rod is provided with a conducting section and a sealing section, and the diameter of the conducting section is smaller than that of the sealing section; when the sealing section of the valve rod is contacted with the flat ring, the first channel and the second channel are blocked, and the first channel and the second channel are communicated. This is disclosed through fixing seal assembly in the holding intracavity of valve body, adopts the valve rod to remove and seal assembly mode motionless, reduces seal assembly's deformation degree and displacement risk, improves seal assembly's life.

Description

Mechanical valve structure

Technical Field

The present disclosure relates to the field of valve technology, and more particularly, to a mechanical valve structure.

Background

The mechanical valve is a structure for realizing the on-off and reversing of a gas path or a liquid path through the movement of an internal valve plate;

in the technology known by the inventor, the mechanical valve is mostly provided with a sealing element on a valve rod, and the contact and the separation of the sealing element and a sealing surface of a valve body are realized through the movement of the valve rod, so that the on-off or the switching of a passage of the valve is realized; however, in the process of implementing the above scheme, the inventor finds that when the valve rod moves, a large friction force exists between the valve rod and the interior of the valve body, and the long-term use of the valve rod can cause the seal to loosen or be dislocated on the valve rod, thereby causing the valve to fail in function;

the information disclosed in this background section is only for enhancement of understanding of the general background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of at least one of the above technical problems, the present disclosure provides a mechanical valve structure, which employs a sealing member fixed in a valve body to achieve sealing or passage switching by contact with the sealing member when a valve stem moves, so as to improve the service life of the mechanical valve.

According to an aspect of the present disclosure, there is provided a mechanical valve structure including:

the valve comprises a valve body, wherein an accommodating cavity is formed in the valve body along a first direction, and at least one side of the accommodating cavity along the first direction of the valve body is communicated with the outside;

the sealing assembly is fixed in the accommodating cavity and comprises a flat ring, the outer wall of the flat ring is in close contact with the inner wall of the accommodating cavity, the flat ring is arranged in a hollow mode, and the thickness direction of the flat ring is parallel to the first direction;

the valve rod is arranged in the accommodating cavity in a sliding mode relative to the valve body along a first direction, and the valve rod penetrates through the flat ring;

the valve body is provided with a first channel and a second channel which are communicated with the accommodating cavity, and the first channel and the second channel are arranged on two sides of the sealing assembly; the valve rod is provided with a conducting section and a sealing section, and the diameter of the conducting section is smaller than that of the sealing section; when the sealing section of the valve rod is in contact with the flat ring, the first channel and the second channel are blocked, and when the conducting section of the valve rod is located at the position of the flat ring, the first channel and the second channel are conducted.

In some embodiments of the present disclosure, the receiving cavity has a stepped passage toward the first direction, and a portion of the valve stem within the stepped passage is configured as a corresponding stepped shaft structure.

In some embodiments of the present disclosure, the flat ring includes a main body sealing ring and a metal skeleton support, the metal skeleton support is a metal ring piece, and is fixed with the axle center on a side of the main body sealing ring, just the outer lane diameter that the metal skeleton supported is less than the diameter of main body sealing ring outer lane, the diameter that the metal skeleton supported the inner circle is greater than the diameter of main body sealing ring inner circle.

In some embodiments of the present disclosure, the flat ring further includes an annular boss disposed on the other side surface of the main body seal ring, the annular boss being disposed at a position intermediate between the outer diameter and the inner diameter of the main body seal ring and protruding toward the thickness direction of the main body seal ring.

In some embodiments of the present disclosure, the sealing assembly further includes a spacer and a gasket, the spacer is attached to the metal skeleton supporting side, and the gasket is connected to the annular protrusion side.

In some embodiments of the present disclosure, the fixing base is fixed to one end of the accommodating cavity, an opening cavity is formed in the fixing base and faces to an opening in one end of the valve rod, an end of the valve rod extends into the opening cavity, and a spring connected to the valve rod and the opening cavity is further arranged between the valve rod and the opening cavity.

In some embodiments of the present disclosure, a fixing column is disposed at the bottom of the open cavity, a fixing cavity is disposed at an end of the valve rod extending into the open cavity, one end of the spring is sleeved on the fixing column, and the other end of the spring extends into the fixing cavity.

In some embodiments of the present disclosure, the fixed base peripheral side and the valve stem have seals on the peripheral side of the stepped channel section.

In some embodiments of the disclosure, the sealing assemblies are arranged in two groups at intervals, the first channel and the second channel are arranged at two sides of one group of the sealing assemblies, the valve body is further provided with a third channel communicated with the accommodating cavity, and the third channel is arranged at one side of the other group of the sealing assemblies far away from the first channel and the second channel;

the sealing sections on the valve rod are arranged on two sides of the conducting section, and the length of the conducting section is configured to be that when the sealing sections are in contact with one group of sealing assemblies, the conducting section is located at the other sealing assembly.

In some embodiments of the present disclosure, the transition surface of the conducting section and the sealing section is rounded.

The beneficial effect of this disclosure does: this is disclosed through set up the holding chamber in the valve body, and fix seal assembly in the holding intracavity, fix on the holding chamber through the outer lane with seal assembly, improve seal assembly's fixed reliability, and through set up conduction section and seal section on the valve rod, make the seal section of valve rod realize blocking of first passageway and second passageway when the inner circle contact of oblate in with seal assembly, realize switching on of first passageway and second passageway when the conduction section of valve rod is in the inner circle position of oblate, compared with the prior art, through fixed seal assembly, use the mode realization of valve rod and oblate inner circle contact sealed, seal assembly's deformation has been reduced, seal assembly's fixed reliability has been improved, thereby the life of valve body has been improved.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure 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, it is obvious that the drawings in the following description are only some embodiments described in the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of a mechanical valve structure in an embodiment of the present disclosure when sealed;

FIG. 2 is a schematic structural diagram illustrating the mechanical valve structure in the embodiment of the present disclosure when conducting;

FIG. 3 is a schematic structural view of a valve body in an embodiment of the present disclosure;

FIG. 4 is a schematic structural view of a pancake coil according to an embodiment of the present disclosure;

FIG. 5 is a schematic sectional view taken along line A-A of FIG. 4 in an embodiment of the present disclosure;

FIG. 6 is a schematic structural view of a seal assembly in an embodiment of the present disclosure;

FIG. 7 is a schematic view of a connection structure between a valve stem and a fixed base according to an embodiment of the disclosure;

fig. 8 is a schematic structural diagram of a three-way valve in an embodiment of the disclosure.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

According to the sealing assembly, the sealing assembly is fixed in the accommodating cavity of the valve body, the deformation degree of the sealing assembly is reduced by adopting a mode that the valve rod moves and the sealing assembly does not move, the service life of the sealing assembly is prolonged, and the detailed description of the specific implementation mode under the conception of the sealing assembly is provided below;

example one

The mechanical valve structure shown in fig. 1 to 7 includes a valve body 10, a seal assembly 20, and a valve stem 30, wherein:

the valve body 10 is internally provided with an accommodating cavity 11 along the first direction, and at least one side of the accommodating cavity 11 along the first direction of the valve body 10 is communicated with the outside; the receiving chamber 11 is used for receiving the sealing assembly 20 and the valve rod 30, and in some embodiments of the present disclosure, the first direction is along the length direction of the valve body 10;

the sealing assembly 20 is fixed in the accommodating cavity 11 and comprises a flat ring 21, the outer wall of the flat ring 21 is tightly contacted with the inner wall of the accommodating cavity 11, the flat ring 21 is arranged in a hollow manner, and the thickness direction of the flat ring 21 is parallel to the first direction; in some embodiments of the present disclosure, the sealing assembly 20 is fixed by embedding the sealing assembly 20 on the inner wall of the accommodating chamber 11 by forming a fixing groove in the accommodating chamber 11; of course, in other embodiments of the present disclosure, the fixing manner of the sealing assembly 20 may be provided as gluing or other forms;

the valve rod 30 is arranged in the accommodating cavity 11 in a sliding mode relative to the valve body 10 along the first direction, and the valve rod 30 penetrates through the flat ring 21; as shown in fig. 1, in the embodiment of the present disclosure, the valve body 10 has a first passage 12 and a second passage 13 communicating with the accommodation chamber 11, and the first passage 12 and the second passage 13 are disposed on both sides of the seal assembly 20; the valve rod 30 is provided with a conducting section 31 and a sealing section 32, and the diameter of the conducting section 31 is smaller than that of the sealing section 32; when the sealing section 32 of the valve rod 30 contacts with the flat ring 21, the first channel 12 and the second channel 13 are blocked, and when the conducting section 31 of the valve rod 30 is at the position of the flat ring 21, the first channel 12 and the second channel 13 are conducted. As shown in particular in fig. 2, in some embodiments of the present disclosure, the diameter of the conducting section 31 is smaller than the inner diameter of the flat ring 21, such that when the conducting section 31 is at the position of the flat ring 21, the first channel 12 and the second channel 13 can communicate through the gap between the flat ring 21 and the conducting section 31 on the valve stem 30; with continued reference to fig. 1, the diameter of the sealing section 32 of the valve rod 30 is larger than the inner diameter of the flat ring 21, when the sealing section 32 of the valve rod 30 contacts with the inner ring of the flat ring 21, a sealing surface is formed between the two, and the passage between the first passage 12 and the second passage 13 is blocked;

in the above embodiment, by providing the receiving cavity 11 in the valve body 10 and fixing the sealing assembly 20 in the receiving cavity 11, by fixing the outer ring of the sealing assembly 20 on the receiving cavity 11, the fixing reliability of the sealing assembly 20 is improved, and by providing the conducting section 31 and the sealing section 32 on the valve rod 30, the first channel 12 and the second channel 13 are blocked when the sealing section 32 of the valve rod 30 contacts with the inner ring of the flat ring 21 in the sealing assembly 20, and the conducting section 31 of the valve rod 30 conducts between the first channel 12 and the second channel 13 when the conducting section 31 of the valve rod 30 is at the inner ring position of the flat ring 21, compared with the prior art, by fixing the sealing assembly 20, sealing is achieved by using the contact between the valve rod 30 and the inner ring of the flat ring 21, so that the deformation of the sealing assembly 20 is reduced, and the sliding friction between the valve rod 30 and the sealing assembly 20 is also reduced, and sealing is achieved only by contact, the fixing reliability of the sealing assembly 20 is improved, thereby improving the service life of the valve body 10.

Regarding the movement limitation of the valve rod 30 within the receiving cavity 11, as shown in fig. 3, in some embodiments of the present disclosure, the receiving cavity 11 has a stepped passage 11a toward the first direction, and a portion of the valve rod 30 within the stepped passage 11a is configured as a corresponding stepped shaft structure. It should be noted that, the step cavity here means that the diameter of the passage close to the inside of the valve body 10 is larger than the diameter of the passage far from the inside of the valve body 10, the valve rod 30 is correspondingly arranged in the step passage 11a, and further when the valve rod 30 is pulled out from the inside of the valve body 10, due to the arrangement of the step passage 11a, the valve rod 30 can only move within the distance limited by the step passage 11a, thereby improving the use reliability of the mechanical valve;

in the embodiment of the present disclosure, an improvement is made to the structure of the flat ring 21, as shown in fig. 4 and 5, the flat ring 21 includes a main body seal ring 21a and a metal skeleton support 21b, the metal skeleton support 21b is a metal ring piece and is coaxially fixed on one side surface of the main body seal ring 21a, the diameter of the outer ring of the metal skeleton support 21b is smaller than that of the outer ring of the main body seal ring 21a, and the diameter of the inner ring of the metal skeleton support 21b is larger than that of the inner ring of the main body seal ring 21 a. In some embodiments of the present disclosure, the metal ring sheet is a stainless steel sheet, which is combined with the rubber body when the flat ring 21 is molded, so that the flat ring 21 is reinforced in its deformation resistance in the axial direction, and does not deform or displace even under a large air pressure or flow rate; in addition, in the embodiment of the present disclosure, with continuing reference to fig. 5, the flat ring 21 further includes an annular boss 21c disposed on the other side surface of the main body seal ring 21a, and the annular boss 21c is disposed at a position intermediate between the outer diameter and the inner diameter of the main body seal ring 21a and protrudes toward the thickness direction of the main body seal ring 21 a. The arrangement of the annular boss 21c can reduce the adhesion of the surface of the flat ring 21, thereby reducing the aging speed of rubber on the flat ring 21; it should be noted that, in some embodiments of the present disclosure, the material of the flat ring 21 is low-temperature fluororubber; thus, the arrangement of the metal framework support 21b and the annular boss 21c further improves the deformation resistance of the flat ring 21 and reduces the aging speed of the flat ring 21, thereby prolonging the service life of the valve body 10;

further, in order to improve the reliability of fixing the flat ring 21, in the embodiment of the present disclosure, as shown in fig. 1 and fig. 6, the sealing assembly 20 further includes a spacer 22 and a gasket 23, the spacer 22 is attached to the side of the metal framework support 21b, and the gasket 23 is connected to the side of the annular protrusion; in some embodiments of the present disclosure, the gasket 23 is made of metal, and is clamped in the accommodating cavity 11 by way of an annular groove, the spacer 22 is made of rubber, and the fixing reliability of the flat ring 21 is further improved by arranging auxiliary support structures on two sides of the flat ring 21;

in some embodiments of the present disclosure, as shown in fig. 1, 2 and 7, a fixing base 40 is further included, the fixing base 40 is fixed at one end of the accommodating cavity 11, and an opening cavity 41 which is opened towards one end of the valve rod 30 is formed in the fixing base 40, an end of the valve rod 30 extends into the opening cavity 41, and a spring 50 connected with the valve rod 30 and the opening cavity 41 is further provided between the valve rod 30 and the opening cavity 41. In the embodiment of the present disclosure, the fixing base 40 is used to guide and fix the other end of the valve rod 30, and the fixing manner of the fixing base 40 is, in the embodiment of the present disclosure, to connect through a snap provided on the valve body 10; it should be noted that, in some embodiments of the present disclosure, the fixing base 40 is connected to the valve body 10 by welding or screwing, and the spring 50 is disposed to compress the spring 50 when the valve rod 30 receives an external force, and when the external force disappears, the valve rod 30 returns to the original position under the action of the spring 50, so as to maintain the original set open or close state; furthermore, in some embodiments of the present disclosure, as shown in fig. 1, the sealing assembly 20 may also be fixed by a rod body connected with the fixing base 40;

referring to fig. 7, in some embodiments of the present disclosure, a specific fixing structure of the spring 50 in the fixing base 40 is that a fixing pillar 41a is disposed at the bottom of the open cavity 41, a fixing cavity 33 is disposed at one end of the valve rod 30 extending into the open cavity 41, one end of the spring 50 is sleeved on the fixing pillar 41a, and the other end of the spring extends into the fixing cavity 33. Through the arrangement in the mode, the spring 50 is reliably fixed in the moving direction of the valve rod 30, and the situation that the spring 50 deviates in the moving process of the valve rod 30 is prevented, so that the sealing reliability of the mechanical valve is further improved;

in some embodiments of the present disclosure, in order to improve the sealing performance of the valve body 10 and the stationary base 40, please continue to refer to fig. 7, the stationary base 40 and the valve stem 30 have a seal on both the peripheral side of the stepped channel 11a section. In the embodiment of the present disclosure, the sealing element is an O-ring, and the sealing performance between the valve rod 30 and the step channel 11a during the moving process can be improved by the arrangement of the O-ring; meanwhile, when the fixed base 40 is placed, leakage at the fixed base 40 can be prevented through arrangement of a sealing piece; in addition, in the embodiment of the present disclosure, in order to reduce the friction damage to the flat ring 21 when the valve rod 30 moves, the transition surface between the conducting section 31 and the sealing section 32 of the valve rod 30 is rounded. By the round-off setting, the contact area with the inner ring of the flat ring 21 can be changed in the moving process of the valve rod 30, thereby improving the sealing effect.

Example two

In a second embodiment of the present disclosure, the mechanical valve is configured as a three-way valve structure, as shown in fig. 8, the sealing assemblies 20 are arranged at intervals in two groups, the first channel 12 and the second channel 13 are arranged on two sides of one group of sealing assemblies 20, the valve body 10 further has a third channel 14 communicated with the accommodating cavity 11, and the third channel 14 is arranged on one side of the other group of sealing assemblies 20 away from the first channel 12 and the second channel 13;

the sealing sections 32 on the valve rod 30 are arranged on two sides of the conducting section 31, and the length of the conducting section 31 is configured that when the sealing section 32 is contacted with one group of sealing assemblies 20, the conducting section 31 is at the other position of the sealing assemblies 20.

Specifically, in some embodiments of the present disclosure, when the three-way valve is a gas valve, the first channel 12 is a gas inlet, the second channel 13 is a working port, and the third channel 14 is a gas outlet, please continue to refer to fig. 8, when the sealing section 32 of the valve rod 30 contacts the sealing assembly 20 close to the third channel 14, the second channel 13 is disconnected from the third channel 14, the first channel 12 is connected to the second channel 13, the gas path is opened, and the working port starts to admit gas; when the valve rod 30 is reversely moved to enable the sealing assembly 20 close to the first channel 12 to be in contact with the sealing section 32, the first channel 12 and the second channel 13 are disconnected, the second channel 13 is communicated with the third channel 14, and the working port starts to exhaust; thus, by the movement of the valve rod 30, the function of the three-way valve is realized; it should be noted that the three-way valve is only an example of the embodiment of the present disclosure, and those skilled in the art can arrange more seal assemblies 20, conducting sections 31 and sealing sections 32 on the valve rod 30 to achieve the function of conducting more paths based on the inventive concept of the present disclosure, but the above-mentioned embodiment still falls into the scope of the present disclosure.

It will be understood by those skilled in the art that the present disclosure is not limited to the embodiments described above, which are presented solely for purposes of illustrating the principles of the disclosure, and that various changes and modifications may be made to the disclosure without departing from the spirit and scope of the disclosure, which is intended to be covered by the claims. The scope of the disclosure is defined by the appended claims and equivalents thereof.

Claims (10)

1. A mechanical valve structure, comprising:

the valve comprises a valve body, wherein an accommodating cavity is formed in the valve body along a first direction, and at least one side of the accommodating cavity along the first direction of the valve body is communicated with the outside;

the sealing assembly is fixed in the accommodating cavity and comprises a flat ring, the outer wall of the flat ring is in close contact with the inner wall of the accommodating cavity, the flat ring is arranged in a hollow mode, and the thickness direction of the flat ring is parallel to the first direction;

the valve rod is arranged in the accommodating cavity in a sliding mode relative to the valve body along a first direction, and the valve rod penetrates through the flat ring;

the valve body is provided with a first channel and a second channel which are communicated with the accommodating cavity, and the first channel and the second channel are arranged on two sides of the sealing assembly; the valve rod is provided with a conducting section and a sealing section, and the diameter of the conducting section is smaller than that of the sealing section; when the sealing section of the valve rod is in contact with the flat ring, the first channel and the second channel are blocked, and when the conducting section of the valve rod is located at the position of the flat ring, the first channel and the second channel are conducted.

2. The mechanical valve structure of claim 1, wherein the receiving cavity has a stepped passage toward the first direction, and a portion of the valve stem within the stepped passage is configured as a corresponding stepped shaft structure.

3. The mechanical valve structure of claim 1, wherein the flat ring comprises a main body seal ring and a metal skeleton support, the metal skeleton support is a metal ring piece and is coaxially fixed on one side surface of the main body seal ring, the diameter of an outer ring of the metal skeleton support is smaller than that of an outer ring of the main body seal ring, and the diameter of an inner ring of the metal skeleton support is larger than that of an inner ring of the main body seal ring.

4. A mechanical valve structure according to claim 3, wherein said flat ring further includes an annular boss provided on the other side surface of said main body seal ring, said annular boss being provided at a position intermediate between the outer diameter and the inner diameter of said main body seal ring and protruding toward the thickness direction of said main body seal ring.

5. The mechanical valve structure of claim 4, wherein the seal assembly further comprises a spacer sleeve and a gasket, the spacer sleeve is in abutting connection with the metal skeleton supporting side, and the gasket is in connection with the annular convex side.

6. The mechanical valve structure of claim 2, further comprising a fixing base, wherein the fixing base is fixed at one end of the accommodating cavity, an opening cavity is formed in the fixing base and is arranged towards the opening of one end of the valve rod, the end of the valve rod extends into the opening cavity, and a spring connected with the valve rod and the opening cavity is further arranged between the valve rod and the opening cavity.

7. The mechanical valve structure of claim 6, wherein the bottom of the open cavity is provided with a fixed column, one end of the valve rod extending into the open cavity is provided with a fixed cavity, one end of the spring is sleeved on the fixed column, and the other end of the spring extends into the fixed cavity.

8. The mechanical valve structure according to claim 6, wherein both the stationary seat peripheral side and the valve stem have a seal on the peripheral side of the stepped channel section.

9. The mechanical valve structure of any one of claims 1 to 8, wherein the sealing assemblies are arranged in two groups at intervals, the first channel and the second channel are arranged on two sides of one group of the sealing assemblies, the valve body is further provided with a third channel communicated with the accommodating cavity, and the third channel is arranged on one side, away from the first channel and the second channel, of the other group of the sealing assemblies;

the sealing sections on the valve rod are arranged on two sides of the conducting section, and the length of the conducting section is configured to be that when the sealing sections are in contact with one group of sealing assemblies, the conducting section is located at the other sealing assembly.

10. A mechanical valve structure according to claim 9, characterised in that the transition surfaces of the conducting section and the sealing section are rounded.

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