WO2024067661A1

WO2024067661A1 - Longitudinally-rotating valve clack shielding valve capable of being updated online without disassembly

Info

Publication number: WO2024067661A1
Application number: PCT/CN2023/121876
Authority: WO
Inventors: 韩杰; 李来志
Original assignee: 沈阳耐蚀合金泵股份有限公司
Priority date: 2022-09-29
Filing date: 2023-09-27
Publication date: 2024-04-04
Also published as: CN115492941A

Abstract

The present invention relates to a longitudinally-rotating valve clack shielding valve capable of being updated online without disassembly. The longitudinally-rotating valve clack shielding valve comprises a valve body (1) and a valve rod (12). A pressing plate assembly (6) is fixedly arranged at the bottom of the valve rod (12). A valve clack assembly is arranged in an inner side area of the pressing plate assembly (6). The valve clack assembly is transversely and movably connected to the pressing plate assembly (6). A rotary stepping control mechanism is arranged on one side of the valve clack assembly. The valve clack assembly comprises a valve clack (5) and a movable shaft (2) transversely fixed in the middle of the valve clack (5). Two ends of the movable shaft (2) respectively penetrate long waist holes (601) on two sides of the pressing plate assembly (6). A working surface at the bottom of the valve clack (5) corresponds to a valve port (101) in a flow channel of the valve body (1). The rotary stepping control mechanism is arranged at one end of the movable shaft (2). According to the present invention, the valve is scratch-resistant, corrosion-resistant, has high hardness, has a long service life, has neither internal leakage nor external leakage, and has the characteristics of a plurality of valve clacks in one valve.

Description

Longitudinal rotating disc barrier valve that can be updated online without disassembly

Technical Field

The invention belongs to the field of water supply and drainage shielding valves in chemical industry, electric power, metallurgy, desulfurization and denitrification, and in particular relates to a longitudinal rotating valve disc shielding valve that can be updated online without disassembly.

Background technique

Valves come in many varieties and specifications. They are important components in the fields of electricity, metallurgy, desulfurization and denitrification, and play a very important role in human production and life. Ordinary valves will form small gaps at the moment of opening and closing. It is inevitable that during use, the medium containing hard particles will form high-speed erosion on the sealing surface, sometimes forming cavitation and other phenomena, causing valve internal leakage and short life. In addition, ordinary valves have only one valve disc, which needs to be replaced after wear.

Summary of the invention

In order to solve the problem of internal leakage of the sealing surface of ordinary valves, the purpose of the present invention is to provide a longitudinal rotating valve disc shielding valve that is resistant to abrasion and corrosion, has high hardness and long service life, has neither internal leakage nor external leakage, and has the characteristics of one valve with multiple valve discs, which can be updated online without disassembly.

To solve the above technical problems, the present invention is achieved as follows:

A longitudinally rotating valve disc shielding valve which can be updated online without disassembly comprises a valve body and a valve stem; a pressure plate assembly is fixedly provided at the bottom of the valve stem; a valve disc assembly is provided in the inner area of the pressure plate assembly; the valve disc assembly is laterally movably connected to the pressure plate assembly; a rotation stepping control mechanism is provided on one side of the valve disc assembly to control the valve disc assembly to rotate around its axis.

Furthermore, the valve flap assembly includes a valve flap and a movable shaft transversely fixed in the middle of the valve flap; the two ends of the movable shaft respectively pass through the long waist holes on both sides of the pressure plate assembly; the bottom working surface of the valve flap corresponds to the valve port in the valve body flow channel; the rotation stepping control mechanism is arranged at one end of the movable shaft.

Furthermore, the rotary stepping control mechanism includes a ratchet, a rocker, a driving pawl, and a braking pawl; the ratchet and the rocker are located on the same side of the movable shaft; the ratchet is fixedly sleeved with one end of the movable shaft; one end of the rocker is movably connected to the movable shaft; one end of the driving pawl is movably connected to the movable shaft of the rocker; the other end of the driving pawl is movably plugged into the tooth groove of the ratchet; one end of the braking pawl is slidably arranged on the back of the teeth of the ratchet; an elastic return member is provided on the braking pawl; and a limit block is provided in the valve body corresponding to the rotation stroke area of the rocker end.

Furthermore, the valve flap adopts a columnar polyhedron, a sphere or a columnar disc structure; the working surface of the columnar polyhedron facing the valve port adopts a spherical structure.

Furthermore, the rotation stepping control mechanism includes a side control mechanism; the side control mechanism includes a side rod; the end of the side rod corresponds to the middle area of the valve flap assembly; a chuck is provided on the other side of the valve flap assembly; An equal distribution mechanism is provided on the plate.

Furthermore, the end of the side rod is movably connected to the support rod assembly; the support rod assembly includes a parallel four-bar linkage and a top working end movably connected to the parallel four-bar linkage; the upper and lower ends of the parallel four-bar linkage are respectively movably connected to the support rod; the compression amplitude of the parallel four-bar linkage is sufficient to ensure that the support rod reaches the position of the inner hole wall of the push valve flap assembly; the parallel four-bar linkage is fixed with a spring.

Furthermore, the dividing mechanism includes a paddle and a clamping groove; the clamping grooves are evenly distributed on the circumferential edge of the chuck and correspond to the paddle.

Each time the valve is opened, one side of the valve flap is replaced. Even if one side is worn, the valve can be continuously used by opening and closing the valve once. The valve has the characteristics of multiple valve flaps on one valve. At the same time, the valve has the advantages of abrasion resistance, corrosion resistance, high hardness, long service life, no internal leakage and no external leakage, and can solve the problems of internal leakage of the sealing surface of ordinary valves and high maintenance costs. The valve flap of the present invention is made of metal and has a series of excellent properties such as high hardness, wear resistance, and corrosion resistance. It can maximize the service life of the valve under harsh working conditions, especially high pressure difference, scouring, cavitation, etc. The shape feature of the valve flap of the present invention is that it adopts a columnar polyhedron, sphere or columnar disc structure. A single side of the valve flap can form a static seal with the valve port, without stopping for maintenance, no blockage, and the service life is several times that of ordinary valves.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. The protection scope of the present invention is not limited to the following description.

FIG1 is a schematic diagram of the structure of the present invention when the valve is in a closed state;

FIG2 is a schematic diagram of the structure of the present invention when the valve is in an open state;

FIG3 is a side view of a valve flap with a columnar polyhedral structure according to the present invention;

FIG4 is a side view of a valve flap of a cylindrical polyhedron structure having a spherical working surface according to the present invention;

FIG5 is a schematic diagram of a spherical valve flap according to the present invention;

FIG6 is a schematic diagram of the working state of the ratchet wheel when the rocker does not touch the limit block of the present invention;

FIG7 is a schematic diagram of the working state of the ratchet wheel when the rocker touches the limit block of the present invention;

FIG8 is a schematic diagram of the structure of the guide part of the present invention;

Fig. 9 is a cross-sectional view along the line A-A in Fig. 8 of the present invention;

FIG10 is a schematic diagram of the rotation structure of the side control valve flap assembly of the present invention;

FIG. 11 is a schematic diagram of the structure of the chuck and the equal division mechanism of the present invention.

In the figure: 1, valve body; 101, valve port; 2, movable shaft; 3, ratchet; 4, rocker; 5, valve disc; 6, pressure plate assembly; 601, long waist hole; 7, limit block; 8, valve cover; 9, hand wheel; 10, copper nut; 11, shielding sleeve; 12, valve stem; 13. Guide groove; 14. Guide block; 15. Driving pawl; 16. Braking pawl; 17. Elastic return member; 18. Side rod; 19. Second elastic shielding sleeve; 20. Chuck; 22. Parallel four-bar linkage; 221. Top working end; 222. Block; 223. Spring; 23. Slot; 24. Paddle; 25. Side handwheel; 26. Groove.

Detailed ways

As shown in the figure, a longitudinally rotating valve disc shielding valve that can be updated online without disassembly includes a valve body 1 and a valve stem 12; a pressure plate assembly 6 is fixedly provided at the bottom of the valve stem 12; a valve disc assembly is provided in the inner area of the pressure plate assembly 6; the valve disc assembly is laterally movably connected to the pressure plate assembly 6; a rotation stepping control mechanism is provided on one side of the valve disc assembly to control the valve disc assembly to rotate around its axis.

The valve flap assembly of the present invention includes a valve flap 5 and a movable shaft 2 laterally fixed in the middle of the valve flap 5; the two ends of the movable shaft 2 respectively pass through the long waist holes 601 on both sides of the pressure plate assembly 6; the bottom working surface of the valve flap 5 corresponds to the valve port 101 in the flow channel of the valve body 1; the rotary stepping control mechanism is arranged at one end of the movable shaft 2.

The rotary stepping control mechanism of the present invention comprises a ratchet 3, a rocker 4, a driving pawl 15 and a braking pawl 16; the ratchet 3 and the rocker 4 are located on the same side of the movable shaft 2; the ratchet 3 is fixedly sleeved with one end of the movable shaft 2; one end of the rocker 4 is movably connected to the movable shaft 2; one end of the driving pawl 15 is movably connected to the rocker 4; the other end of the driving pawl 15 is movably plugged into the tooth groove of the ratchet 3; one end of the braking pawl 16 is slidably arranged on the back of the teeth of the ratchet 3; an elastic return member 17 is arranged on the braking pawl 16; a limit block 7 is arranged in the valve body 1 at a position corresponding to the rotation stroke area of the end of the rocker 4.

In the present invention, a guide block 14 is fixedly provided at the other end of the movable shaft 2; a guide groove 13 is fixedly provided on the inner wall of the valve body 1 cavity corresponding to the guide block 14; the guide block 14 is placed in the guide groove 13 and can move up and down along the guide groove 13 longitudinally.

The valve flap 5 of the present invention adopts a cylindrical polyhedron, a sphere or a cylindrical disc structure. The structural selection of the valve flap 5 is diverse, as long as the new working surface of the valve flap 5 corresponding to the valve port 101 can achieve a sufficient sealing degree with the valve port 101 after the rotary stepping control mechanism drives the valve flap 5 to rotate a certain angle. A web or a solid structure is provided inside the valve flap. The working surface of the cylindrical polyhedron facing the valve port 101 of the present invention adopts a spherical structure. The present invention provides an elastic shielding sleeve 11 between the valve stem 12 and the valve cover 8. In the specific design, the guide block 14 of the present invention can adopt a bearing structure.

Referring to FIG. 1 and FIG. 2, in the specific design of the present invention, its overall structure includes valve body 1, movable shaft 2, ratchet 3, rocker 4, valve disc 5, pressure plate assembly 6, limit block 7, valve cover 8, hand wheel 9, copper nut 10, shielding sleeve 11, valve stem 12, guide groove 13 and guide block 14. When the valve port 101 of the valve needs to be closed, the valve stem 12 is rotated by hand wheel 9, and the valve stem 12 cooperates with the copper nut 10 above the valve cover 8 to generate a downward thrust acting on the pressure plate assembly 6. The valve disc 5 is arranged below the pressure plate assembly 6. The valve disc 5 adopts a columnar polyhedron structure. Referring to FIG. 1 and FIG. 6, the pressure plate assembly 6 is pressed tightly. While the valve disc 5 has one working surface, the other working surface of the symmetrical valve disc 5 forms a static seal with the valve port 101 of the valve body. When the valve port 101 of the valve is opened, the hand wheel 9 is rotated in the reverse direction, the valve stem 12 rises, and the pressure plate assembly 6 drives the valve disc 5 to rise, as shown in Figures 2 and 7. When the valve disc 5 rises to a certain height, the rocker 4 touches the limit block 7 and tilts, the driving pawl 15 is lifted and clamps the next tooth of the ratchet 3, and the braking pawl 16 also stops the ratchet 3 from rotating at the same time, thereby realizing the replacement of one side of the valve disc. As shown in Figures 6 and 7, the specific action process of the rotary stepping control mechanism is: the driving pawl 15 drives the ratchet 3 to make intermittent motion. The driving pawl 15 is driven by the rocker 4 to make reciprocating motion, thereby driving the ratchet 3 to make unidirectional motion. The braking pawl 16 is used to clamp the ratchet 3, reversely lock the ratchet 3, and make the ratchet 3 move unidirectionally. When the rocker 4 touches the stop block 7 and then swings counterclockwise, the driving pawl 15 is inserted into the tooth groove of the ratchet 3, so that the ratchet 3 rotates a certain angle. At this time, the brake pawl 16 rotates around the fixed axis at its lower end under the action of the elastic return member 17, and the upper end of the brake pawl 16 slides on the back of the teeth of the ratchet 3. The elastic return member 17 can be a leaf spring or a tension spring structure. When the rocker 4 rotates clockwise, the brake pawl 16 prevents the ratchet 3 from rotating clockwise, while the driving pawl 15 can slide on the back of the teeth of the ratchet 3. In the specific design, the stop block 7 can be selected in the form of a movable pin, etc. When the valve is found to have internal leakage or the valve disc working surface needs to be replaced, the stop block 7 is rotated to the set touch position and fixed, and the valve disc rotates to replace the working surface once. When the valve disc working surface does not need to be replaced, the stop block 7 is removed, the ratchet 3 does not rotate, and the valve disc 5 does not rotate. The advantage of the present invention is that when the working surface of the valve disc needs to be replaced, the limit block 7 is adjusted to the set touch position and fixed, and the valve can be opened for replacement. Even if one side is worn, the valve can be opened and closed once to continue using. It has the characteristics of one valve with multiple valve discs. Referring to Figures 8 and 9, the present invention is fixed with a guide block 14 at the other end of the movable shaft 2; a guide groove 13 is fixed at the position of the guide block 14 on the inner wall of the cavity of the valve body 1; the guide block 14 is placed in the guide groove 13 and can move up and down along the guide groove 13 longitudinally. When the valve disc 5 moves up and down, the guide block 14 fixed at the other end of the movable shaft 2 slides or rolls up and down along the guide groove 13. The above-mentioned structural design can ensure that the valve disc 5 does not deviate from the direction when moving up and down, thereby achieving the purpose of precise sealing of the valve port 101.

The outer circumference of the valve stem 12 of the present invention is provided with a shielding sleeve 11. The shielding sleeve 11 itself is elastic and can freely expand and contract with the rise and fall of the valve stem 12 and isolate the medium from leaking outward. Each side of the valve plate assembly 6 is made of a high-hardness metal or the surface is welded with a wear-resistant superhard metal, and then processed into a smooth plane. When the working surface of the valve disc needs to be replaced, the limit block 7 is adjusted to the set touch position and fixed, and the valve is opened. The valve disc 5 can replace a working surface through the ratchet 3. Even if one side is worn, it can continue to be used by opening and closing the valve once, thereby extending the working life of a valve.

Referring to Figures 10 and 11, when the present invention adopts a side-controlled valve flap assembly rotation structure, the rotation stepping control mechanism of the present invention includes a side control mechanism; the side control mechanism includes a side rod 18; a second elastic shielding sleeve 19 is provided between the side rod 18 and the valve body 1; the end of the side rod 18 corresponds to the middle area of the valve flap assembly; a chuck 20 is provided on the other side of the valve flap assembly; and an equal dividing mechanism is provided on the chuck 20.

The end of the side rod 18 of the present invention is movably connected to the support rod assembly; the support rod assembly includes a parallelogram 22 and a top working end 221 movably connected to the parallelogram 22; the upper and lower ends of the parallelogram 22 are respectively movably connected to a clamping block 222; the compression amplitude of the parallelogram 22 is sufficient to ensure that the clamping block 222 reaches the position of the inner hole wall of the push valve flap assembly; the parallelogram 22 is fixed with a spring 223.

The equal division mechanism of the present invention comprises a paddle 24 and a clamping groove 23; the clamping groove 23 is evenly distributed at the circumferential edge of the chuck 20 and corresponds to the paddle 24; the two sides of the valve flap assembly are movably connected to the pressure plate assembly 6 via the bearing 7. Of course, according to design requirements, the equal division mechanism can also adopt the design concept of ball spring buckle.

When the valve is closed, the valve stem 12 is rotated by the hand wheel 9, and the valve stem 12 cooperates with the copper nut 10 above the valve cover 8 to generate a downward thrust acting on the pressure plate assembly 6. A valve flap assembly is arranged below the pressure plate assembly 6. The valve flap 5 in the valve flap assembly can adopt a cubic polyhedron structure. While the pressure plate assembly 6 presses one side of the valve flap 5, the other symmetrical side forms a static seal with the valve port 101 of the valve body. When the valve is opened, the hand wheel 9 is rotated in the opposite direction, the valve stem 12 rises, and the pressure plate assembly 6 drives the valve flap assembly to rise. When the sealing surface of the valve flap needs to be replaced, it is lifted to a specific height, and the side hand wheel 25 is turned. The side rod 18 drives the strut assembly to be stuck in the groove 26 on one side of the polyhedron valve flap, and the resistance of the paddle 24 is overcome to rotate the polyhedron valve flap to a certain angle to update the sealing surface of the sealing valve flap. A dial can be set below the side hand wheel 25, so that the position and angle of the valve disc 5 in the valve cavity can be checked in time. The paddle 24 is fixed on one side of the pressure plate assembly 6 and is elastic. The front end is inserted into the slot 23 in the chuck 20, and its resistance is greater than the pressure of the medium. It can only rotate when the block 222 on the strut assembly is inserted into the groove 26 of the valve disc and sufficient force is applied to the valve disc. When the rotation is completed, the side rod 18 retracts to its original position, and the spring 223 pushes the parallel four-bar linkage 22 inward and leaves the position of the groove 26. The pressure plate assembly 6 that fixes the polyhedron valve disc is an upper and lower bisected structure, and bearings are set on both sides for easy rotation. The height of the upper edge is greater than the rotation radius of the polyhedron. The purpose and advantage of the present invention is that when the valve disc needs to be updated, it does not need to be disassembled from the pipeline. It can be completed by turning the hand wheel on one side to a certain angle. It has the characteristics of one valve with multiple valve discs.

In the description of the present invention, it is necessary to understand that the orientation or positional relationship indicated by the terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

In the present invention, unless otherwise clearly specified and limited, terms such as "set", "connect", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention. The scope of the invention is defined by the following claims and their equivalents.

Claims

A longitudinally rotating valve disc shielding valve which can be updated online without disassembly, comprises a valve body (1) and a valve stem (12); characterized in that a pressure plate assembly (6) is fixedly provided at the bottom of the valve stem (12); a valve disc assembly is provided in the inner area of the pressure plate assembly (6); the valve disc assembly is laterally movably connected to the pressure plate assembly (6); and a rotation stepping control mechanism is provided on one side of the valve disc assembly to control the valve disc assembly to rotate around its axis.
According to claim 1, a longitudinally rotating valve disc shielding valve that can be updated online without disassembly is characterized in that: the valve disc assembly includes a valve disc (5) and a movable shaft (2) transversely fixed to the middle of the valve disc (5); the two ends of the movable shaft (2) respectively pass through the long waist holes (601) on both sides of the pressure plate assembly (6); the bottom working surface of the valve disc (5) corresponds to the valve port (101) in the flow channel of the valve body (1); and the rotation stepping control mechanism is arranged at one end of the movable shaft (2).
According to claim 2, a longitudinal rotary valve disc shielding valve that can be updated online without disassembly is characterized in that: the rotary stepping control mechanism includes a ratchet (3), a rocker (4), a driving pawl (15), and a braking pawl (16); the ratchet (3) and the rocker (4) are located on the same side of the movable shaft (2); the ratchet (3) is fixedly sleeved with one end of the movable shaft (2); one end of the rocker (4) is movably connected to the movable shaft of the movable shaft (2); one end of the driving pawl (15) is movably connected to the movable shaft of the rocker (4); the other end of the driving pawl (15) is movably plugged into the tooth groove of the ratchet (3); one end of the braking pawl (16) is slidably arranged on the back of the teeth of the ratchet (3); an elastic return member (17) is provided on the braking pawl (16); and a limit block (7) is provided in the valve body (1) at a position corresponding to the rotation travel area of the end of the rocker (4).
According to claim 3, the longitudinal rotating valve disc shielding valve that can be updated online without disassembly is characterized in that: the valve disc (5) adopts a cylindrical polyhedron, a sphere or a cylindrical disc structure; the working surface of the cylindrical polyhedron facing the valve port (101) adopts a spherical structure.
According to claim 1, the longitudinal rotary valve disc shielding valve that can be updated online without disassembly is characterized in that: the rotary stepping control mechanism includes a side control mechanism; the side control mechanism includes a side rod (18); the end of the side rod (18) corresponds to the middle area of the valve disc assembly; a chuck (20) is provided on the other side of the valve disc assembly; and an equal dividing mechanism is provided on the chuck (20).
According to claim 5, the longitudinal rotating valve disc shielding valve that can be updated online without disassembly is characterized in that: the end of the side rod (18) is movably connected to the support rod assembly; the support rod assembly includes a parallelogram linkage (22) and a top working end (221) movably connected to the parallelogram linkage (22); the upper and lower ends of the parallelogram linkage (22) are respectively movably connected to the clamping block (222); the compression amplitude of the parallelogram linkage (22) is sufficient to ensure that the clamping block (222) reaches the position of the inner hole wall of the push valve disc assembly; the parallelogram linkage (22) is fixed with a spring (223).
According to claim 6, the longitudinal rotary valve disc shielding valve that can be updated online without disassembly is characterized in that: the dividing mechanism includes a paddle (24) and a clamping groove (23); the clamping groove (23) is evenly distributed on the circumferential edge of the chuck (20) and corresponds to the paddle (24).