WO2022205129A1

WO2022205129A1 - Valve opening and closing structure and valve

Info

Publication number: WO2022205129A1
Application number: PCT/CN2021/084551
Authority: WO
Inventors: 张光; 王维伟; 林哲; 刘琦
Original assignee: 浙江理工大学
Priority date: 2021-03-29
Filing date: 2021-03-31
Publication date: 2022-10-06
Also published as: CN113090780A; CN113090780B

Abstract

A valve opening and closing structure and a valve. The valve opening and closing structure comprises: a rotating chuck (8), a plurality of valve flaps (5), and a limiting chuck (1). Both sides of each valve flap (5) are respectively provided with a sliding member (6) and a guide member (4); the rotating chuck (8) is provided with sliding grooves (7) in one-to-one correspondence to the sliding members (6); the sliding members (6) can slide along the sliding grooves (7); the limiting chuck (1) is provided with guide rails (2) in one-to-one correspondence to the guide members (4); the guide members (4) can slide and rotate along the guide rails (2); and the plurality of valve flaps (5) are enclosed to form a circle. The valve opening and closing structure is configured to drive, by means of the rotation of the rotating chuck (8), the plurality of valve flaps (5) to move along respective sliding grooves (7) and guide rails (2). The valve comprises a housing and the valve opening and closing structure; the rotating chuck (8) is movably supported in the housing; and the limiting chuck (1) is fixed to the housing.

Description

A valve opening and closing structure and valve

technical field

The present application relates to the field of valves, in particular to a valve opening and closing structure and a valve.

Background technique

The valve is a control component in the pipeline fluid conveying system. It is used to change the passage section and the flow direction of the medium. It has the functions of diversion, cut-off, throttling, check, shunt or overflow and pressure relief. Different types of valves play different roles in the process of pipeline fluid transportation.

In order to adjust the fluid flow in the pipeline system, a ball valve or a butterfly valve is often used to achieve this function.

In the ball valve, the opening and closing parts are driven by the valve stem and rotate around the axis of the ball valve. It can also be used for fluid regulation and control. Among them, the hard-sealed V-shaped ball valve has a strong shear force between the V-shaped ball core and the metal valve seat of hard alloy surfacing, which is especially suitable for fibers and tiny solid particles. etc. medium. The multi-port ball valve can not only flexibly control the confluence, diversion, and flow direction switching of the medium on the pipeline, but also can close one of the channels and connect the other two channels. This type of valve should generally be installed horizontally in the pipeline.

In the butterfly valve, it is a valve that opens, closes or adjusts the flow of the medium through the reciprocating rotation of the disc opening and closing member by about 90°. Butterfly valve not only has simple structure, small volume, light weight, low material consumption, small installation size, small driving torque, simple and rapid operation, but also has good flow regulation function and closing sealing characteristics at the same time. One of the fastest valve varieties. Butterfly valves are widely used. The variety and quantity of its use continue to expand, and it is developing in the direction of high temperature, high pressure, large diameter, high sealing, long life, excellent adjustment characteristics, and a valve integrating multiple functions. Its reliability and other performance indicators have reached a high level.

However, whether it is a ball valve or a butterfly valve, the movement of the opening and closing parts is located inside the valve. For the fluid flowing through the valve, the turbulence of the fluid will be greatly increased due to the existence of the opening and closing parts, so that the fluid flows through the valve. It is more prone to cavitation. Once cavitation occurs, it will cause a series of hazards to the valve body, including cavitation, vibration and so on.

In addition to the possibility of cavitation due to the increased degree of turbulence, when the angle between the opening and closing member and the flow direction of the fluid is not vertical or horizontal, the asymmetry will cause the pressure on the valve wall at different positions Different, in the long run, the side of the valve that has been stressed for a long time will be damaged first, thus greatly shortening the life of the valve.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present application is to provide a method, a device, and an electronic device to solve the problem in the related art that the turbulence of the fluid and the asymmetry of the pressure surface are caused by the opening and closing of the valve being located inside the fluid flow area. The problem that the uneven force causes the valve to break from a certain force concentration point.

According to the first aspect of the embodiments of the present application, a valve opening and closing structure is provided, including: a rotating chuck, a plurality of valve discs, and a limit chuck, and two sides of each valve disc are respectively provided with a sliding member and a guide member, so The rotating chuck is provided with a one-to-one sliding groove corresponding to the sliding member, the sliding member can slide along the sliding groove, and the limit chuck is provided with a one-to-one track corresponding to the guiding member, The guide member can slide and rotate along the track, and the plurality of valve discs are enclosed in a circle, and are configured to drive the plurality of valve discs to move along the respective chute and track through the rotation of the rotating chuck to form a circle. predetermined opening.

Further, the valve flap is a double-layer structure, one layer of which is a fan-shaped structure, a sliding member is arranged on one side of the fan-shaped structure, and the other layer is a water-drop-shaped structure as a whole, and one side of the water-drop-shaped structure is formed. Guides are provided on the sides, and the two-layer structures are matched and fixedly connected at a predetermined angle.

Further, the limit chuck is composed of two concentric rings, and the two concentric rings are connected by a connecting piece with the track.

Further, the edge of the limit chuck is also provided with bolt holes, which are fixedly connected to the housing through bolts.

According to a second aspect of the embodiments of the present invention, a valve is provided, comprising a casing and the valve opening and closing structure described in the first aspect, the rotary chuck is rotatably supported in the casing, and the limit clip The disk is fixed on the housing.

Further, the casing is composed of a front casing and a rear casing distributed on both sides of the valve body.

Further, the front housing is composed of two parts, one part is a straight pipe of equal diameter, the other end is a semicircular flow hood, and bolt holes are provided at the edge of the semicircular flow hood.

Further, the flow passage behind the valve is composed of three parts, one part is a straight pipe of equal diameter, the other part is a semicircular flow hood, and bolt holes are also provided at the edge of the flow hood. The last part is a short equal-diameter straight tube in the flow hood that is matched with the rotating bearing to provide support for the rotation of the rotating chuck.

Further, a drive assembly is also included, and the drive assembly drives the rotary chuck to rotate.

Further, the driving assembly includes a rotating shaft, a gear mounted on the rotating shaft of the rotating shaft, and an external gear ring arranged on the outer edge of the rotating chuck, and the gear and the external gear ring are engaged with each other.

The technical solutions provided by the embodiments of the present application may include the following beneficial effects:

It can be seen from the above embodiments that during the opening (closing) of the valve opening and closing structure, the valve flaps move from the center to the surrounding (from the surrounding to the center) at the same time. For fluids, when the opening and closing parts are not in fluid flow Inside the area, it has little effect on the flow state of the fluid, effectively reducing the increase in fluid turbulence, significantly reducing the possibility of cavitation, and also reducing cavitation and vibration caused by cavitation to a certain extent. Problem: In the embodiment of the present invention, the movement direction of the valve flap is perpendicular to the flow direction of the fluid, which is different from the previous valve plate rotating along a certain direction to realize the opening and closing of the valve. The pressure surface composed of the same valve disc has uniform force in all directions during the opening and closing process, which is beneficial to reduce the damage of the valve from a certain concentrated force point.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not limiting of the present application.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application.

FIG. 1 is a schematic structural diagram of a valve opening and closing structure according to an exemplary embodiment.

Fig. 2 is an exploded schematic diagram of a valve opening and closing structure according to an exemplary embodiment.

FIG. 3 is a schematic structural diagram of a valve flap according to an exemplary embodiment, wherein (a) and (b) are perspective views of two different angles.

FIG. 4 is a schematic structural diagram of a valve according to an exemplary embodiment.

Fig. 5 is a schematic exploded view from a side view of a valve after the casing is removed, according to an exemplary embodiment.

Fig. 6 is a schematic exploded view from another side of a valve after the casing is removed, according to an exemplary embodiment.

FIG. 7 is a schematic diagram of a full cross-sectional structure of a valve according to an exemplary embodiment.

FIG. 8 is a schematic structural diagram of a flow cover of a front housing according to an exemplary embodiment.

FIG. 9 is a schematic structural diagram of a rear housing flow cover according to an exemplary embodiment.

FIG. 10 is a schematic structural diagram of a runner according to an exemplary embodiment.

Reference numerals: 1, limit chuck; 2, guide rail; 3, front sealing ring; 4, guide piece; 5, valve disc; 6, sliding piece; 7, chute; 8, rotating chuck; Tooth; 10. Inner concentric circle; 11. Rear sealing ring; 12. Rotating bearing; 13. Transmission tooth; 14. Rotating shaft; 15. Runner; 16. Front casing flow cover; 17. Front equal diameter pipe; 18. Rear casing flow hood; 19. Equal diameter short straight pipe; 20. Fan-shaped structure; 21. Water drop-shaped structure.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as recited in the appended claims.

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

Aiming at the problems of the turbulence of the fluid and the uneven force of the valve body due to the presence of opening and closing parts inside the valve body of traditional ball valves, butterfly valves and the like, the embodiments of the present invention aim to provide a novel valve opening and closing device. Closed structure, this structure can not only effectively weaken the corrosion effect, has good sealing, convenient disassembly and maintenance, but also can rectify the high turbulence fluid and solve the valve life caused by the uneven force on one side of the valve body. Shorten this question.

1-3, an embodiment of the present invention provides a valve opening and closing structure, the valve opening and closing structure is arranged in the valve shell, the valve opening and closing structure realizes the opening and closing of the valve, and the structure may include: a rotating card The disc 8, the multi-piece valve discs 5 and the limit chuck 1, the two sides of each valve disc 5 are respectively provided with a sliding member 6 and a guide member 4, and the rotating chuck 8 has a one-to-one correspondence with the sliding member 6 The sliding groove 7, the sliding member 6 can slide along the sliding groove 7, the limit chuck 1 is provided with a guide rail 2 corresponding to the guide member 4 one-to-one, and the guide member 4 can slide along the guide member 4. The guide rail 2 slides and rotates, and the multi-piece valve flaps 5 form a circle, and are configured to drive the multi-piece valve flaps to move along their respective chutes and tracks through the rotation of the rotary chuck to form a predetermined opening.

In the embodiment of the present invention, referring to FIG. 3 , the sliding member 6 can be a cuboid, and as long as the uniqueness of the movement direction can be achieved, it can be used as a sliding member. Cylinder, the cylinder is currently the only one that can achieve rotational motion while moving in a specific direction, so it is designed as a cylinder. The sliding member 6 is designed with a rectangular parallelepiped so that the sliding member can only move along the chute. During the opening and closing process, the guide member 4 not only needs to move in a certain direction, but also has a certain degree of rotational movement. Therefore, the guide member 4 is designed as a cylinder. When the valve needs to be opened or closed, the short rods on both sides will move towards different directions along the chute 7 of the rotating chuck 8 and the guide rail 2 of the limit chuck 1 respectively. Directional movement, under the action of these two different directions of movement, all the valve flaps 5 will be opened or closed at the same time, realizing the opening and closing of the valve;

In the embodiment of the present invention, referring to FIG. 3 , the valve flap 5 is a double-layer structure, and the first layer is a fan-shaped structure 20 . One side of the fan-shaped structure is provided with a sliding member 6 of a rectangular parallelepiped, and the other layer is a water droplet as a whole. A cylindrical guide member 4 is provided on one side of the drop-shaped structure, and the two-layer structures are matched and fixedly connected at a predetermined angle. During the opening and closing process, the valve disc 5 will rotate to a certain extent, and the existence of the arc end of the water drop layer is conducive to realizing the opening and closing of the valve disc 5; when the valve is closed, it is through the cooperation between the smooth sections of the fan-shaped layer Turn off this feature. Of course, the shape of the valve disc 5 is not limited to the fan-shaped structure 20 and the water drop-shaped structure 21, as long as it can realize opening and closing after the coupling of multiple valve discs 5. This example shows 6 valve discs 5, specifically The quantity can be set by yourself.

What needs to be said is that the predetermined angle here only needs to enable the multi-piece valve disc to open and close smoothly, and the overall strength of the valve disc can be guaranteed after the two layers are connected. The specific design can be based on the actual situation. conventional technical means.

In the embodiment of the present invention, the position-limiting chuck 1 may be formed of two concentric rings, and the two concentric rings are connected by a connecting piece provided with the guide rail 2 . On the one hand, the opening and closing of the valve disc 5 is formed by the movement in two directions, and the guide rail 2 of the limit chuck 1 provides an oblique radial movement for the movement of the valve disc 5, on the other hand The limit chuck 1 also plays a role in ensuring that the unscrewing and unscrewing between different valve discs 5 occur in the same plane.

In the embodiment of the present invention, the edge of the limit chuck 1 is further provided with bolt holes, which are fixedly connected to the front housing flow cover 16 through bolts. During the opening and closing process of the valve, the limit chuck 1 is fixed according to the relative movement, and the front housing flow cover 16 provides support for the fixation of the limit chuck 1, because the front housing is kept relatively static during the working process , thereby ensuring the stability of the limit chuck 1 . The particularity of the position of the limit chuck 1 makes it possible to directly separate the front housing, the limit chuck 1 and the valve disc 5 after removing the outermost bolts of the valve body. This makes it possible to directly replace the parts by removing the connecting bolts of the casing when a certain type of parts in the valve body fails, which greatly facilitates the maintenance and repair of the valve body.

Referring to FIG. 4 , an embodiment of the present invention further provides a valve, the valve may include a casing and the valve opening and closing structure described above, the rotary chuck 8 is rotatably supported in the casing, and the limit chuck 1 is fixed on the housing. The specific details of the valve opening and closing structure will not be repeated here.

By adopting the above technical solution, multiple valve discs 5 are arranged inside the casing, and the opening and closing of the multiple valve discs 5 at the same time makes the opening formed between the valve discs 5 and the valve discs 5 can be in a predetermined regular geometric shape, and because The valve disc 5 is a smooth arc on the side close to the flow channel. Although the opening and closing parts are also moving in the shell, but different from the traditional butterfly valve or ball valve, the opening and closing parts no longer appear inside the fluid, which greatly reduces the impact on the fluid. The influence of the degree of turbulence when flowing through the valve greatly reduces the possibility of cavitation when the fluid flows through the valve. Since the occurrence of cavitation is reduced, a series of problems caused by cavitation include gas Problems such as corrosion and vibration have also been solved to a certain extent. In addition, because the valve discs 5 are completely the same, the pressure generated in all directions when the fluid passes through the valve remains the same, avoiding the problem that the valve is damaged in advance due to the backlog on one side. The existence of the casing flow cover 16 increases the pressure bearing area in the direction of incoming flow, and further reduces the pressure of the fluid on the valve.

In the embodiment of the present invention, referring to FIGS. 4-7 , between the flow cover 16 of the front casing and the flow cover 18 of the rear casing, a rotating chuck 8 is provided. The chuck 8 is not a fixture, and therefore does not need to be bolted to the rear housing shroud 18 . The rotating chuck 8 is rotatably supported in the housing, and the limiting chuck 1 is fixed on the housing. The rotating chuck 8 has an annular groove on the side close to the flow cover 18 of the rear casing. The outer side of the groove is provided with a rotating tooth 13, and the inner side of the groove is provided with a rotating bearing 12. The gear transmission is used to convert the power input from the outside into the rotation of the rotating chuck 8. After the rotation of the rotating chuck 8 is realized, the rotating chuck 8 provides another part of the movement for the opening and closing of the valve flap 5. Combined with the oblique radial motion provided by the limit chuck 1, the movement of the valve flap 5 is realized; in addition, the rotation of the rotary chuck 8 cannot only rely on the smoothness of the surface to realize the rotation between the two surfaces, In the long run, there will be more obvious wear between the two surfaces that are in contact with each other. Therefore, on the one hand, in order to realize the rotation of the rotary chuck 8 and at the same time to prolong the service life of the valve, a rotary bearing 12 is provided inside the groove, and the rotary chuck 8 relies on the rotary bearing 12 to realize the rotation under the action of gear transmission. Rotation of the chuck 8. The limiting chuck 1 and the rotating chuck 8 are respectively provided with annular valve front sealing ring 3 and valve rear sealing ring 11 at the outer edges of the inner concentric circles. The support of the rotary bearing 12 is provided by the inner concentric circle 10 of the rotary chuck 8 and the equal-diameter short straight pipe 19 of the rear housing, because the inner concentric circle 10 of the rotary chuck and the rear housing are equal in diameter here. The cooperation between the straight pipes 19 therefore involves the sealing between the contact surfaces. Here, the valve rear sealing ring 11 is used to realize the sealing of the contact surfaces.

For fluids, the opening and closing parts are not located in the fluid flow area, which has little effect on the flow state of the fluid, effectively reducing the increase in the degree of fluid turbulence; at the same time, due to the symmetry of the pressure surface during the opening and closing process, the pressure surface is in the It has uniform force in all directions, which is beneficial to reduce the damage of the valve from a certain concentrated force point.

In the embodiment of the present invention, the casing is composed of a front casing and a rear casing. The existence of the front casing and the rear casing provides support for the fixing of the valve opening and closing structure, and ensures the stability of the valve opening and closing structure during operation.

In the embodiment of the present invention, referring to FIG. 8 , the front housing is composed of two parts, one part is a straight pipe 17 of equal diameter, and the other end is a front housing flow hood 16 , and bolts are provided at the edge of the front housing flow hood hole. The flow hood contained in the front housing allows more space for fluid accumulation in front of the valve, and has a larger pressure bearing area, which makes the unit pressure that the valve needs to bear smaller, which is beneficial to ensure that the valve has a longer service life. life, and will not be damaged by excessive pressure. The existence of the bolt holes is to fix the limit chuck 1 on the flow cover 16 of the front housing, thereby ensuring the stability of the limit chuck 1 during operation.

In the embodiment of the present invention, referring to FIG. 9 , the rear casing is composed of three parts, one part is a straight pipe of equal diameter, and the other part is the rear casing flow hood 18 , and bolt holes are also provided at the edge of the flow hood. The last part is a short straight pipe 19 of equal diameter in the flow hood, which cooperates with the inner concentric circle 10 and provides support for the rotation of the rotary bearing 12 together. The design of the rear casing flow cover 18 is to cooperate with the front casing flow cover 16. There is also an opening above the flow cover for the tapered rod section of the rotating shaft 14 to pass through. The existence of the bolt holes is for the convenience of the valve as a whole. The existence of the equal diameter short straight pipe 19 is to cooperate with the inner concentric circle 10 of the rotary chuck 8 to provide support for the rotation of the rotary bearing 12, so that the stability of the rotary bearing 4 is further guaranteed.

In the embodiment of the present invention, referring to FIG. 5 and FIG. 10 , a drive assembly is further included, and the drive assembly drives the rotary chuck 8 to rotate. The rotary chuck 8 is used for driving, the disc-shaped driving member is used to make the driving member have higher strength, and the gear transmission is used to realize the opening of a specific opening degree more accurately.

In the embodiment of the present invention, referring to FIG. 5 and FIG. 10 , the driving assembly includes a rotating shaft 14, a transmission tooth 13 mounted on the rotating shaft of the rotating shaft, and a rotating tooth 9 disposed on the outer edge of the rotating chuck, so The transmission teeth 13 mesh with the rotating teeth 9 . By using the rotating shaft 14 and gear transmission, the change of the force direction and the precise control of the opening can be realized at the same time.

In the embodiment of the present invention, the rotating shaft 14 is composed of two sections, one section is a short cylinder with transmission teeth 13 on the side, and the other section is a tapered rod with a thread at one end. 15 is connected, and a projection with arc-shaped ends at both ends is arranged near the thread to cooperate with the runner 15 so as to prevent the connection between the runner 15 and the rotating shaft 14 from slipping.

Other embodiments of the present application will readily occur to those skilled in the art upon consideration of the specification and practice of what is disclosed herein. This application is intended to cover any variations, uses or adaptations of this application that follow the general principles of this application and include common knowledge or conventional techniques in the technical field not disclosed in this application . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

It is to be understood that the present application is not limited to the precise structures described above and illustrated in the accompanying drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

A valve opening and closing structure, which is characterized in that it includes: a rotating chuck, a plurality of valve discs and a limit chuck, the two sides of each valve disc are respectively provided with a sliding member and a guide member, and the rotating chuck is provided with a The sliding pieces correspond one-to-one with the sliding grooves, the sliding pieces can slide along the sliding grooves, and the limit chuck has a one-to-one track corresponding to the guiding pieces, and the guiding pieces can slide along the sliding grooves. The track slides and rotates, and the multiple valve flaps form a circle, which is configured to drive the multiple valve flaps to move along the respective chute and track through the rotation of the rotating chuck to form a predetermined opening.
The valve opening and closing structure according to claim 1, wherein the valve flap is a double-layer structure, one layer of which is a fan-shaped structure, a sliding member is provided on one side of the fan-shaped structure, and the other layer is integrally It has a water-drop-shaped structure, and a guide is arranged on one side of the water-drop-shaped structure, and the two-layer structures are matched and fixedly connected at a predetermined angle.
The valve opening and closing structure according to claim 1, wherein the limit chuck is composed of two concentric rings, and the two concentric rings are connected by a connecting piece with the track.
The valve opening and closing structure according to claim 1, wherein the edge of the limit chuck is further provided with bolt holes, which are fixedly connected to the housing through bolts.
A valve, characterized in that it comprises a casing and the valve opening and closing structure according to any one of claims 1-4, the rotary chuck is rotatably supported in the casing, and the limit chuck is fixed on the housing.
The valve according to claim 5, wherein the casing is composed of a front casing and a rear casing distributed on both sides of the valve body.
The valve according to claim 6, wherein the front housing is composed of two parts, one part is a straight pipe of equal diameter, the other end is a semicircular flow hood, and an edge of the semicircular flow hood is provided with Bolt hole.
The valve according to claim 6, wherein the flow passage behind the valve is composed of three parts, one part is a straight pipe of equal diameter, the other part is a semicircular flow hood, and bolt holes are also provided at the edge of the flow hood. . The last part is a short equal-diameter straight tube in the flow hood that mates with the rotary bearing to provide support for the rotation of the rotary chuck.
The valve of claim 5, further comprising a drive assembly that drives the rotary chuck to rotate.
The valve according to claim 9, wherein the drive assembly comprises a rotating shaft, a gear mounted on the rotating shaft of the rotating shaft, and an external gear ring arranged on the outer edge of the rotating chuck, the gear and The outer ring gear meshes.