CN217559049U

CN217559049U - Valve core and valve seat combined structure

Info

Publication number: CN217559049U
Application number: CN202221765944.4U
Authority: CN
Inventors: 郑巧玲
Original assignee: Megney Fluid Control China Co ltd
Current assignee: Megney Fluid Control China Co ltd
Priority date: 2022-07-09
Filing date: 2022-07-09
Publication date: 2022-10-11
Anticipated expiration: 2032-07-09

Abstract

The utility model relates to a case disk seat integrated configuration, include: the valve body comprises a ventilation cavity, and the valve seat is fixed in the ventilation cavity; the end part of the valve core is provided with a piston joint, the piston joint comprises a base part and a circular table part, the bottom surface of the circular table part is rigidly connected with the bottom of the base part, the circular table part is positioned in the valve seat, and the diameter of the bottom surface of the circular table part is larger than the diameter of the surface of the circular table part; the axial line of the ventilation cavity and the axial line of the valve core are positioned on the same straight line, the diameter of the bottom surface of the circular table part is equal to that of the through hole of the valve seat, and an included angle alpha formed by a bus of the circular table part and the inner wall of the valve seat is smaller than or equal to 30 degrees. The utility model provides a scheme can realize the control to airflow flow proportionally, improves the accuracy of valve aperture control.

Description

Valve core and valve seat combined structure

Technical Field

The utility model relates to a valve structure designs technical field, especially relates to a case disk seat integrated configuration.

Background

A valve is a device for controlling the direction, pressure, and flow rate of a fluid in a fluid system, and is a device capable of controlling the flow rate of a medium (liquid, gas, powder) in a pipe or equipment by flowing or stopping the medium; the valve is a control part in a pipeline fluid conveying system, is used for changing the section of a passage and the flowing direction of a medium, and has the functions of diversion, cut-off, throttling, non-return, shunt or overflow pressure relief and the like; the valves for controlling fluid are various in variety and specification, and can be used for controlling the flow of various types of fluid such as water, steam, oil products, gas, slurry, various corrosive media, liquid metal, radioactive fluid and the like.

The valve can be controlled by adopting various transmission modes, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic hydraulic, electrohydraulic, pneumatic hydraulic, spur gear, bevel gear drive and the like; the valve can be operated according to the preset requirement under the action of pressure, temperature or other forms of sensing signals, or can be simply opened or closed without depending on the sensing signals, and the valve can make the opening and closing piece perform lifting, sliding, swinging or rotating motion by depending on a driving or automatic mechanism, so that the size of the flow passage area of the valve can be changed to realize the control function of the valve.

Most of opening regulating valves of the existing valves adopt equal percentage characteristic (logarithm) and linear characteristic (linear) modes to control the regulating valves, the valve control of the mode adopts the equal percentage characteristic mode to control in the first 30% of the opening, and the linear characteristic mode to control in the later 70%; however, the front part of 30% ensures normal valve opening under high pressure, and when the opening is larger than 70%, the opening of the valve is in a full-open state, which causes the flow precision to be in a gradual runaway state, leads to insufficient flow precision control and reduces the working performance of the valve.

Therefore, how to enable the valve opening to be precisely controlled is a technical problem to be solved by technicians at present.

SUMMERY OF THE UTILITY MODEL

For overcoming the problem that exists among the correlation technique, the utility model provides a case disk seat integrated configuration can realize the equal proportion ground to airflow flow's control, improves the accuracy of valve aperture control.

In order to achieve the above object, the utility model discloses mainly adopt following technical scheme to be a case disk seat integrated configuration, include:

the valve body comprises a ventilation cavity, and the valve seat is fixed in the ventilation cavity; the end part of the valve core is provided with a piston joint, the piston joint comprises a base part and a circular table part, the bottom surface of the circular table part is rigidly connected with the bottom of the base part, the circular table part is positioned in the valve seat, and the diameter of the bottom surface of the circular table part is larger than the diameter of the surface of the circular table part; the axial line of the ventilation cavity and the axial line of the valve core are positioned on the same straight line, the diameter of the bottom surface of the circular table part is equal to that of the through hole of the valve seat, and an included angle alpha formed by a bus of the circular table part and the inner wall of the valve seat is smaller than or equal to 30 degrees.

Preferably, the surface of the circular truncated cone part is further provided with a cone, the diameter of the bottom surface of the cone is equal to the diameter of the surface of the circular truncated cone part, and the height of the cone is smaller than that of the circular truncated cone.

Preferably, the diameters of the base part and the base seat are all larger than the diameter of the bottom surface of the circular truncated cone and smaller than the diameter of the valve seat.

Preferably, the vent cavity is further provided with a valve cage, the axis of the valve core coincides with the axis of the valve cage, the valve cage is fixed on the inner wall of the vent cavity, and a cage opening of the valve cage is connected with the outer ring of the valve seat.

Preferably, a guide sleeve is sleeved on the valve core, and the distance from the guide sleeve to the base part is equal to the height of the piston joint.

Preferably, a winding gasket is arranged between the ventilation cavity and the valve seat, and the winding gasket is used for enhancing the air tightness of the connection of the ventilation cavity and the valve seat.

The utility model provides a technical scheme can include following beneficial effect:

in the utility model, the valve body, the valve core and the valve seat are structurally combined, and the ventilation cavity is arranged in the valve body and is a main channel for gas to flow; fixing a valve seat in the ventilation cavity, aligning one end of the valve core with a piston joint with the valve seat to enable the valve seat and the valve core to form a valve for controlling gas flow, and dividing the piston joint into a base part and a circular table part, wherein one end of the base part is connected with the valve core, and the circular table part is arranged in the valve seat to enable the axis of the ventilation cavity, the axis of the valve core and the axis of the valve seat to be located on the same straight line; fixing the bottom surface of the circular truncated cone part on a base part, enabling the bottom surface of the circular truncated cone part to be larger than the surface of the base part, setting the diameter of the bottom surface of the circular truncated cone part to be equal to the diameter of the through hole of the valve seat, and limiting an included angle alpha formed by a generatrix of the circular truncated cone and the inner wall of the valve seat; when gas flows in from the vent cavity, the position of the piston joint is controlled by pulling the valve core, and meanwhile, according to the difference of the diameters of the bottom surface and the surface of the circular table part and the characteristic of utilizing the constant slope of the bus, the dragging distance of the valve core is proportional to the opening of the valve seat, namely, the opening of the valve seat is adjusted in equal proportion by controlling the position relation of the circular table part and the through hole of the valve seat; when the bottom surface of the circular table part is completely positioned at the outlet of the valve seat, the air flow is completely blocked in the through hole of the valve seat; when the surface of the circular table part is positioned at the outlet of the valve seat, the air flow can completely flow out of the through hole of the valve seat; the position relation between the circular table part and the valve seat through hole is controlled, and the constant slope of a bus of the circular table part is combined, so that the control of the airflow flow in equal proportion can be realized, and the accuracy of the valve opening degree control is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.

Fig. 1 is a schematic structural diagram of a valve core and valve seat combined structure shown in the embodiment of the present invention;

in the figure: the valve comprises a valve body-10, a vent cavity-11, a valve core-20, a piston joint-21, a base part-22, a circular table part-23, a cone-24, a valve seat-30, a valve cage-40, a guide sleeve-50 and a winding gasket-60.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings in the embodiments of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive step are within the scope of the present invention. Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, it is to be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

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

It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of the present invention. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Most of opening regulating valves of the existing valves adopt equal percentage characteristic (logarithm) and linear characteristic (linear) modes to control the regulating valves, wherein the valve control in the mode adopts the equal percentage characteristic mode to control in the first 30% of the opening, and the linear characteristic mode to control in the later 70%; however, the front part of 30% ensures normal valve opening under high pressure, and when the opening is greater than 70%, the opening of the valve will be in a full-open state, which causes the flow accuracy to be in a gradual runaway state, leads to insufficient flow accuracy control, and reduces the working performance of the valve.

To the above problem, the embodiment of the utility model provides a case disk seat integrated configuration, this integrated configuration pass through the position relation of control disk portion and disk seat through-hole, combine the invariable slope of the generating line of disk portion, can realize the control to airflow in equal proportion, improve valve aperture control's accuracy.

The technical solution of the embodiment (embodiment one) of the present invention is described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of XXXX shown in the embodiment of the present invention.

Referring to fig. 1, the valve core and valve seat combined structure includes a valve body 10, a valve core 20 and a valve seat 30, wherein the valve body 10 includes a ventilation cavity 11, and the valve seat 30 is fixed in the ventilation cavity 10; a piston joint 21 is arranged at the end part of the valve core 20, the piston joint 21 comprises a base part 22 and a circular table part 23, the bottom surface of the circular table part 22 is rigidly connected with the bottom of the base part 23, the circular table part 22 is positioned in the valve seat 30, and the diameter of the bottom surface of the circular table part 22 is larger than the diameter of the surface of the circular table part 22; the axis of the vent cavity 11 and the axis of the valve core 20 are located on the same straight line, the diameter of the bottom surface of the circular table portion 22 is equal to the diameter of the through hole of the valve seat 30, and an included angle α formed by a generatrix of the circular table portion 22 and the inner wall of the valve seat 30 is smaller than or equal to 30 °.

Specifically, the surface of the circular truncated cone portion 22 is further provided with a cone 24, the diameter of the bottom surface of the cone 24 is equal to the diameter of the surface of the circular truncated cone portion 22, and the height of the cone 24 is smaller than the height of the circular truncated cone portion 23.

Specifically, the base portion 23 has a diameter larger than a bottom surface diameter of the circular truncated portion 22 and smaller than a diameter of the valve seat 30.

Specifically, the vent cavity 11 is further provided with a valve cage 40, an axis of the valve core 20 coincides with an axis of the valve cage 40, the valve cage 40 is fixed on an inner wall of the vent cavity 11, and a cage opening of the valve cage 40 is connected with an outer ring of the valve seat 30.

Specifically, a guide sleeve 50 is sleeved on the valve core 20, and the distance from the guide sleeve 50 to the base portion 23 is equal to the height of the piston joint 21.

Specifically, a winding gasket 60 is disposed between the ventilation cavity 11 and the valve seat 30, and the winding gasket 60 is used to enhance the air tightness of the connection between the ventilation cavity 11 and the valve seat 30.

In the embodiment of the utility model, in order to solve the defect of the opening regulating valve of the current valve, the accuracy of valve control is ensured, and the problem that the valve flow accuracy can be out of control gradually is solved, so as to improve the flow accuracy control capability of the valve opening and improve the working performance of the valve; therefore, the valve body, the valve core and the valve seat are structurally combined, and the vent cavity is arranged in the valve body and is a main channel for gas to flow; fixing a valve seat in the ventilation cavity, aligning one end of the valve core with a piston joint with the valve seat, and enabling the valve seat and the valve core to form a valve for controlling the flow of gas; then dividing the piston joint into a base part and a circular table part, wherein one end of the base part is connected with a valve core, and the circular table part is arranged in the valve seat, so that the axis of the ventilation cavity, the axis of the valve core and the axis of the valve seat are positioned on the same straight line; fixing the bottom surface of the circular truncated cone part on a base part, enabling the bottom surface of the circular truncated cone part to be larger than the surface of the base part, setting the diameter of the bottom surface of the circular truncated cone part to be equal to the diameter of the through hole of the valve seat, and limiting an included angle alpha formed by a generatrix of the circular truncated cone and the inner wall of the valve seat; when gas flows in from the ventilation cavity, the position of the piston joint is controlled by pulling the valve core, meanwhile, according to the difference of the diameters of the bottom surface and the surface of the circular table part and the characteristic of utilizing the constant slope of a bus, the dragging distance of the valve core is proportional to the opening degree of the valve seat, namely, the opening degree of the valve seat can be adjusted in equal proportion by controlling the position relation of the circular table part and the through hole of the valve seat, for example:

when the bottom surface of the circular table part is completely positioned at the outlet of the valve seat, the air flow is completely blocked in the through hole of the valve seat to realize closing; when the surface of the circular table part is positioned at the outlet of the valve seat, airflow can completely flow out of the through hole of the valve seat, so that opening is realized; in addition, the surface of the circular table part can be pulled to any position of the through hole of the valve seat, the flow quantity of gas is limited, and therefore the opening degree of the valve can be accurately controlled; therefore, by controlling the positional relationship between the circular table portion and the valve seat through hole and combining the constant slope of the generatrix of the circular table portion (the smaller the slope, the larger the amplitude of the adjustment opening), the control of the air flow rate in equal proportion can be realized, and the accuracy of the valve opening control can be improved.

It should be noted that, in order to maintain smooth flow of the gas flow in the high-pressure gas flow, in this example, a cone is further provided on the surface of the circular truncated cone, and the diameter of the bottom surface of the cone is set to be equal to the diameter of the surface of the circular truncated cone, so that the cone can be fitted to the surface of the circular truncated cone, wherein the height of the cone is further set to be smaller than the height of the circular truncated cone, so as to ensure the smoothness of the cone and facilitate smooth gas flow.

In order to ensure that the piston joint does not pass through the valve seat completely and affect the control precision of the opening degree, the diameter of the base part is set to be larger than the diameter of the bottom surface of the circular truncated cone, and the diameter of the base part is set to be smaller than the diameter of the valve seat so as to avoid the piston joint from obstructing the movement.

It should be noted that, in order to stabilize the whole structure, in this example, a valve cage is disposed on the vent cavity, and the axis of the valve element is overlapped with the axis of the valve cage, and the valve cage is fixed on the inner wall of the vent cavity, so that the cage opening of the valve cage is rigidly connected to the outer ring of the valve seat, thereby fixing the whole valve seat, preventing the valve seat from being unstable during operation, and reducing the air tightness of the structure; in addition, in order to control the movable range of the piston joint, a guide sleeve is sleeved on the valve core, so that the valve core can slide on the guide sleeve conveniently, meanwhile, the distance from the guide sleeve to the base part is set to be equal to the height of the piston joint, and when the opening degree of the piston joint is adjusted, the guide sleeve can limit the piston joint to be separated from the movable range, so that the whole valve core is stabilized; specifically, a winding gasket is arranged between the vent cavity opening and the valve seat, the bottom of the valve seat is fixed through the winding gasket, meanwhile, the air tightness of the vent cavity connected with the valve seat can be enhanced, and the practicability is improved.

It should also be noted that the valve seat refers to a detachable surface component in the valve, which is used for supporting the valve core at the fully closed position and forming a sealing pair; the diameter of a valve seat is the maximum circulation diameter of the valve, for example, the valve seat of a butterfly valve is made of very wide materials, and various rubbers, plastics and metal materials can be used as the material of the valve seat; the winding gasket comprises an inner ring, an outer ring and an inner ring, wherein the inner ring and the outer ring are based on the sealing surface of the flange, and the winding gasket with the inner ring and the outer ring is used; the inner ring mainly plays a role in strengthening, and the outer ring mainly plays a role in positioning; after the outer diameter of the outer ring is pushed against the bolt, the middle sealing part can be centered, so that a good sealing effect can be achieved.

The valve body is a main part of the valve, and the definition of the valve is a device used for controlling the direction, pressure and flow of fluid in a fluid system; the valve is a device which can control the flow rate of a medium (liquid, gas, powder) in a pipe or equipment while allowing or stopping the flow of the medium; the valve core is a valve part which realizes the basic functions of direction control, pressure control or flow control by the movement of the valve body; the guide sleeve is sleeved for supporting and ensuring the coaxiality of the piston rod and the cylinder barrel, and in the process of extending the hydraulic cylinder rod, the hydraulic cylinder is in contact with the surface of the cylinder barrel, and the longer the stroke of the hydraulic cylinder is, the longer the guide sleeve is; meanwhile, a support is also provided for the oil seal of the oil cylinder opening.

The valve is a control part in a pipeline fluid conveying system, is used for changing the section of a passage and the flowing direction of a medium, and has the functions of diversion, cut-off, throttling, non-return, diversion, overflow pressure relief and the like; valves used for fluid control range from the simplest shut-off valves to the various valves used in extremely complex autonomous systems, ranging in variety and specification from the very tiny instrument valves up to industrial pipeline valves with nominal diameters of up to 10 m.

The solution of the invention has been described in detail above with reference to the drawings. In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments. Those skilled in the art should also appreciate that acts and modules referred to in the specification are not necessarily required by the invention. In addition, can understand, the utility model discloses step in the embodiment method can carry out order adjustment, merge and delete according to actual need, the utility model discloses structure in the device can merge, divide and delete according to actual need.

While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or improvements to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. The utility model provides a case disk seat integrated configuration, includes valve body, case and disk seat, its characterized in that:

the valve body comprises a ventilation cavity, and the valve seat is fixed in the ventilation cavity;

the end part of the valve core is provided with a piston joint, the piston joint comprises a base part and a circular table part, the bottom surface of the circular table part is rigidly connected with the bottom of the base part, the circular table part is positioned in the valve seat, and the diameter of the bottom surface of the circular table part is larger than the diameter of the surface of the circular table part;

the axial line of the ventilation cavity and the axial line of the valve core are positioned on the same straight line, the diameter of the bottom surface of the circular table part is equal to that of the through hole of the valve seat, and an included angle alpha formed by a bus of the circular table part and the inner wall of the valve seat is smaller than or equal to 30 degrees.

2. A valve core and valve seat combined structure as claimed in claim 1, wherein the surface of the circular table portion is further provided with a cone, the diameter of the bottom surface of the cone is equal to the diameter of the surface of the circular table portion, and the height of the cone is smaller than the height of the circular table portion.

3. A valve core and valve seat combination structure as claimed in claim 1, wherein the diameter of the base portion is larger than the diameter of the bottom surface of the circular table portion and smaller than the diameter of the valve seat.

4. The valve core and valve seat combination structure as claimed in claim 1, wherein the ventilation cavity is further provided with a valve cage, the axis of the valve core coincides with the axis of the valve cage, the valve cage is fixed on the inner wall of the ventilation cavity, and a cage opening of the valve cage is connected with the outer ring of the valve seat.

5. The valve core and valve seat combination structure as claimed in claim 1, wherein a guide sleeve is sleeved on the valve core, and the distance from the guide sleeve to the base part is equal to the height of the piston joint.

6. The valve core and valve seat combination structure according to claim 1, wherein a wound gasket is arranged between the ventilation cavity and the valve seat, and the wound gasket is used for enhancing the air tightness of the connection between the ventilation cavity and the valve seat.