CN114001170A

CN114001170A - Erosion-resistant double-core ceramic regulating valve

Info

Publication number: CN114001170A
Application number: CN202111382242.8A
Authority: CN
Inventors: 金浩军; 姜雅周
Original assignee: Yantai Kingway Science & Technology Co ltd
Current assignee: Yantai Kingway Science & Technology Co ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2022-02-01

Abstract

The invention discloses a washout-resistant double-core ceramic regulating valve, which relates to the technical field of valves and comprises a pair of left and right ceramic valve cores, wherein the ceramic valve cores are hermetically arranged in a cavity of a valve body and are symmetrically arranged along the central line of the valve body; and a valve stem including a first end coupled to the actuator and a second end extending through the cavity of the upper platform and removably coupled to the top of the main spool. The ceramic regulating valve provided by the invention is not easy to block in the using process, is high in safety and long in service life, and does not generate bias flow.

Description

Erosion-resistant double-core ceramic regulating valve

Technical Field

The invention relates to the technical field of valves, in particular to a scouring-resistant double-core ceramic regulating valve.

Background

In the industries of coal chemical industry, silicification, mine metallurgy, electric power environmental protection and the like, a large number of fluid conveying and control systems for conveying gas-solid, liquid-solid, gas-liquid-solid and the like exist, particularly under the working condition of hard particle medium, most of the prior art use valves such as hard sealing ball valves, butterfly valves, sliding plate valves, gate valves and the like, the problems of short service life and difficult maintenance exist more or less, and particularly, the situations that the medium is viscous, easy to agglomerate, easy to scale and easy to crystallize or contains large particles exist, so that the erosion is serious, and the situation that various valves are blocked and clamped is often caused.

Taking the hard seal ball valve which is most used under the current working conditions as an example, the analysis is as follows: 1. in the opening and closing process of the ball valve, media easily enter the valve cavity and are accumulated in the valve cavity, and when the temperature of the media is reduced, certain media are solidified to lock the opening and closing piece, so that serious consequences such as valve locking and the like are easily caused. 2. When high-hardness granular media flow at a high speed in a pipeline, bias flow and vortex flow can be generated, the sealing surface of a valve seat is easily damaged or a sprayed layer on the surface of a ball body falls off, the sealing effect of the valve is further influenced, the valve sealing fails seriously, the valve shell and a downstream pipeline are also washed away, the service life of the valve is shortened, and the pipeline needs to be frequently replaced.

After the sliding plate valve operates for a period of time, the middle cavity is filled with materials, so that the valve is blocked; the sliding plate and the clamping plate are seriously abraded, and in the system, due to the physical and chemical properties of fluid, the valves often have the defects that a valve inner part or a valve seat rear flow passage is seriously washed and cavitated, and further the valves and even the whole conveying system cannot normally operate.

Besides poor sealing performance, the flow channel is easy to wash out due to serious bias flow of medium fluid.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the erosion-resistant double-core ceramic regulating valve which is corrosion-resistant, wear-resistant and erosion-resistant, is not easy to block in the using process, has long service life and can not generate bias flow.

The invention adopts the following technical scheme: a scouring-resistant double-core ceramic regulating valve comprises a valve body, wherein the inside of the valve body is a hollow cavity, the top and the bottom of the valve body are respectively and fixedly connected with an upper valve cover and a lower valve cover, the higher part of the upper valve cover forms an upper platform, and the center of the upper platform is provided with a cavity communicated with the valve body; flanges are respectively connected to two sides of the valve body, and a flow channel for medium circulation is formed in the inner cavities of the valve body and the flanges; the left ceramic valve core and the right ceramic valve core are hermetically arranged in a cavity of the valve body and are symmetrically arranged along the center line of the valve body, wherein the ceramic valve core comprises a main valve core positioned at the bottom of the upper platform and an auxiliary valve core positioned at the other side, opposite sides of the main valve core and the auxiliary valve core are respectively provided with a flow channel groove which can be closed, and the main valve core is rotationally connected with the auxiliary valve core through a transmission mechanism; and the valve rod comprises a first end connected with an actuating mechanism and a second end penetrating through the cavity of the upper platform and detachably connected with the top of the main valve core, and the valve rod is used for driving the main valve core to rotate so as to control the opening and closing of the flow passage.

As an optimized scheme, a connecting pin is arranged at the second end of the valve rod, connecting grooves matched with the connecting pin are formed in the centers of the tops of the main valve core and the auxiliary valve core, and the connecting pin of the valve rod is inserted into the connecting grooves to drive the main valve core and the auxiliary valve core to rotate.

As an optimized scheme, the runner grooves of the valve cores are circular after being involuted.

As an optimized scheme, the inner walls of the two flanges and the inner wall of the valve body are both fixedly provided with lining structures for sealing.

As an optimized scheme, the valve rod is in sealing connection with the upper platform through a stuffing box, corrosion-resistant stuffing is filled between the inner side of the stuffing box and the outer side of the valve rod, the corrosion-resistant stuffing is tightly pressed in the stuffing box through a stuffing gland, and the stuffing gland is connected with the upper platform through a fastening bolt.

As an optimized scheme, graphite rings are arranged between the upper valve cover, the lower valve cover and the valve body in a sealing mode.

Compared with the prior art, the invention has the advantages that:

the main structure of the invention is composed of two ceramic valve cores with flow channel grooves at opposite positions, the flow area of the flow channel port composed of the two flow channel grooves is changed by the relative rotation of the two ceramic valve cores, the throttling, opening and closing of the fluid are realized, and meanwhile, the flow channel port composed of the two flow channel grooves is always at the middle position of the valve, thus the bias flow can not be caused, and the scouring can not be caused to the valve shell and the downstream pipeline; the invention can design the shapes of various runner grooves according to the requirements of customers, thereby realizing the adjustment of various flow characteristics.

The main valve core and the auxiliary valve core rotate mutually to open and close the flow channel, the flow channel port formed by the flow channel grooves is not an integral structure any more, and is dislocated and disassembled when the flow channel is closed, so that the valve is not easy to be blocked, and the condition that the valve is blocked or stuck can be effectively relieved.

The internal main components of the valve are made of ceramic materials, and the natural wear-resistant and corrosion-resistant properties of the ceramic are utilized, so that the wear-resistant and corrosion-resistant properties of the whole valve are realized, and the scouring and cavitation action of solid particles on the internal components and the flow passage of the valve under a high pressure difference environment is avoided, so that the damage to the internal components and the flow passage is reduced.

The graphite ring is used for forming a sealing structure between the valve cover and the valve body of the erosion-resistant double-core ceramic regulating valve, and the graphite ring can always keep a sealing state in a high-temperature environment; therefore, the sealing performance of the valve is improved, the service life of the valve is prolonged, and the fireproof requirement of the valve can be met.

Drawings

FIG. 1 is a schematic structural view of a erosion-resistant dual-center ceramic regulating valve of the present invention;

FIG. 2 is a front view of the erosion resistant bi-center ceramic regulator valve of the present invention;

FIG. 3 is a cross-sectional view taken along plane A-A of FIG. 2 of the erosion resistant bi-center ceramic regulator valve of the present invention;

FIG. 4 is a cross-sectional view taken along plane B-B of FIG. 2 of the erosion resistant bi-center ceramic regulator valve of the present invention;

FIG. 5 is a schematic view of the connection between the main valve element and the auxiliary valve element of the present invention;

FIG. 6 is a schematic structural view of a ceramic valve cartridge of the present invention;

FIG. 7 is a schematic plan view of the connection between the main valve core and the auxiliary valve core when the main valve core and the auxiliary valve core are fully opened;

FIG. 8 is a schematic plan view of the connection between the main and secondary spools of the present invention when closed and fully closed;

the valve comprises a valve body 1, an upper valve cover 2, a lower valve cover 3, an upper platform 4, a flange 5, a flow channel 6, a ceramic valve core 7, a main valve core 71, an auxiliary valve core 71a, a flow channel groove 701, a connecting groove 702, a valve rod 8, a connecting pin 81, a driving wheel 9, a driven wheel 10, a packing box 11, a corrosion-resistant packing 12, a packing gland 13, a fastening bolt 14 and a graphite ring 15.

Detailed Description

Hereinafter, in order to facilitate the technical solution of the present invention for those skilled in the art to understand, further description will be made with reference to the accompanying drawings. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention.

In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It may be evident, however, that one or more embodiments may be practiced without these specific details. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

As shown in fig. 1-2, which are a schematic structural diagram and a front view of the erosion-resistant dual-center ceramic regulating valve of the present invention, the erosion-resistant dual-center ceramic regulating valve includes a valve body 1, a hollow cavity is inside the valve body 1, an upper valve cover 2 and a lower valve cover 3 are fixedly connected to the top and the bottom of the valve body 1, the upper surface of the upper valve cover 2 is higher than the upper surface to form an upper platform 4, wherein the upper platform 4 may be located in the middle of the upper surface of the upper valve cover 2 or on both sides of the upper surface, the center of the upper platform 4 is provided with a cavity communicated with the valve body 1, the left and right sides of the valve body 1 are connected with flanges 5, and a flow channel 6 for medium to flow is formed in the inner cavities of the valve body 1 and the flanges 5.

As shown in fig. 3-4, the erosion-resistant double-core ceramic regulating valve further comprises a pair of left and right ceramic valve cores 7, the pair of ceramic valve cores 7 are hermetically installed in the cavity of the valve body 1 and tightly attached to the hollow cavity inside the valve body 1, the shape of the ceramic valve cores 7 is matched with the shape of the hollow cavity inside the valve body 1, and the ceramic valve cores 7 can be cylindrical or other shapes, so that the ceramic valve cores 7 can be designed according to actual needs. The left and right two ceramic valve cores 7 are symmetrically arranged along the central line of the valve body 1, the axes of the two flanges 5 pass through the intersection line of the two ceramic valve cores 7, so that the intersection line of the two flanges 5 and the two ceramic valve cores 7 is kept on a straight line, the two ceramic valve cores 7 comprise a main valve core 71 positioned at the bottom of an upper platform and a secondary valve core 71a positioned at the other side, as shown in fig. 6, the opposite sides of the main valve core 71 and the secondary valve core 71a are respectively provided with a flow channel groove 701 which can be involuted, the flow channel opening formed by the rotation of the main valve core 71 and the secondary valve core 71a is always in the middle of the valve body 1, no bias flow is generated when the flow of fluid medium passes through, so that the valve body 1 and a downstream pipeline can not be washed, the main valve core 71 and the secondary valve core 71a are rotatably connected through a transmission mechanism, so that the position relation of the two flow channel grooves can be changed through the relative rotation of the main valve core 71 and the secondary valve core 71a, and then the flow area of the flow channel 6 is changed, and the effects of throttling, opening and closing the medium fluid are realized. In addition, the main valve core 71 and the auxiliary valve core 71a rotate mutually to open and close the flow channel 6, the flow channel groove 701 is disassembled in a staggered mode, blocking is not prone to occurring, therefore the situation that the valve is blocked or stuck can be effectively relieved, and efficiency is high. The washout-resistant double-core ceramic regulating valve also comprises a valve rod 8, wherein the valve rod 8 comprises a first end connected with an external actuating mechanism and a second end penetrating through a cavity of the upper platform 4 and detachably connected with the top of the main valve core 71, the second end is used for driving the main valve core 71 to rotate, and the main valve core 71 drives the auxiliary valve core 71a to rotate through a transmission mechanism to control the opening and closing of the flow passage 6, so that medium fluid is throttled, opened and closed. As shown in fig. 4, the second end of the valve rod 8 is provided with a connecting pin 81, as shown in fig. 6, the top centers of the main spool 71 and the secondary spool 71a are provided with a connecting groove 702 matched with the connecting pin, the connecting pin 81 of the valve rod 8 is inserted into the connecting groove 702 to drive the main spool 71 and the secondary spool 71a to rotate, and by adopting the detachable connection, the valve is convenient to mount and detach and maintain later, and the positions of the main spool 71 and the secondary spool 71a can be changed as required.

The main spool 71 and the secondary spool 71a are driven to rotate through a transmission mechanism, which may be a structure as shown in fig. 5, including a primary pulley 9 disposed on the top of the main spool 71 and a secondary pulley 10 disposed on the top of the secondary spool 71a and engaged with the primary pulley 9. When the valve rod 8 is driven by an external actuator to rotate, the valve rod 8 is linked with the main valve core 71 to rotate simultaneously, and the driving wheel 9 at the top of the main valve core 71 and the driven wheel 10 at the top of the auxiliary valve core 71a are meshed with each other to rotate, so that the position relation of the two flow channel grooves 701 is changed through the relative rotation of the two ceramic valve cores 7, the flow area of the flow channel 6 is further changed, and the throttling, opening and closing of the fluid are realized. Of course, the form of the transmission mechanism is not limited to the form of the structure in fig. 5 as long as the requirements of the present design are met.

As shown in fig. 7-8, a schematic plane view of a connection relationship between a main valve core and an auxiliary valve core when the main valve core and the auxiliary valve core are fully opened and a schematic plane view of a connection relationship between a main valve core and an auxiliary valve core when the main valve core and the auxiliary valve core are fully closed, in this embodiment, the flow channel grooves of the main valve core 71 and the auxiliary valve core 71a are circular after being closed, and the invention can design various shapes of the flow channel grooves, such as rectangle, triangle, V-shaped, U-shaped, and fan-shaped, according to the requirements of customers, so as to realize adjustment of various flow characteristics, when an external actuator drives a valve rod 8 to rotate, the valve rod 8 will be linked with the main valve core 71 to rotate at the same time, a driving wheel 9 on the top of the main valve core 71 and a driven wheel 10 on the top of the auxiliary valve core 71a are also meshed with each other to rotate, as shown in fig. 7, when the flow channel grooves 701 on the main valve core 71 and the auxiliary valve core 71a are fully aligned, a flow channel 6 of a medium will be fully opened, at this time, the medium can completely flow into a downstream pipeline through the flow channel 6, when the main valve element 71 and the auxiliary valve element 71a continue to rotate mutually and rotate to the position shown in fig. 8, the flow passage 6 of the medium is completely closed, so that the position relation of the two flow passage grooves 701 is changed through the relative rotation of the main valve element 71 and the auxiliary valve element 71a, the flow area of the flow passage 6 is further changed, the throttling, opening and closing of the fluid are realized, meanwhile, the flow passage port formed by the two valve element upper flow passage grooves 701 is always in the middle position of the valve body 1, and the bias flow cannot cause the flushing of the valve shell and the downstream pipeline.

As an improvement of the above embodiment, in this embodiment, the inner walls of the two flanges 5 and the inner wall of the valve body 1 are both fixedly provided with a lining structure for sealing, and the lining structure can ensure that a better sealing effect is provided between the key connection points inside the erosion-resistant double-core ceramic regulating valve

In addition, as shown in fig. 4, as a modification of the above embodiment, in the present embodiment, the valve stem 8 and the upper platform 4 are hermetically connected by a stuffing box 11, a corrosion-resistant stuffing 12 is filled between the inner side of the stuffing box 11 and the outer side of the valve stem 8, the corrosion-resistant stuffing 12 is pressed in the stuffing box 11 by a stuffing cover 13, and the stuffing cover 13 is connected with the upper platform 4 by a fastening bolt 14. Due to the relative rotation between the valve stem 8 and the corrosion-resistant packing 12, solid fine particles do not enter the corrosion-resistant packing 12 through the movement of the valve stem 8 to cause the wear of the packing. Meanwhile, in the implementation, graphite rings 15 are hermetically arranged between the upper valve cover 2, the lower valve cover 3 and the valve body 1, so that the graphite rings 15 can always keep a sealed state in a high-temperature environment; therefore, the sealing performance of the valve is improved, the service life of the valve is prolonged, and the fireproof requirement of the valve can be met.

When the erosion-resistant double-core ceramic regulating valve is used, the erosion-resistant double-core ceramic regulating valve is arranged on a circulating pipeline through the two flanges 5, then an actuating mechanism is arranged on the valve rod 8, the actuating mechanism is started to drive the valve rod 8 to rotate, the valve rod 8 is linked with the main valve core 71 to rotate simultaneously, a driving wheel 9 at the top of the main valve core 71 and a driven wheel 10 at the top of the auxiliary valve core 71a are meshed with each other to rotate, when the main spool 71 and the passage groove 701 of the sub-spool 71a are rotated to be completely aligned, the passage 6 of the medium is completely opened, the medium flows out to the downstream pipe through the passage 6, when the flow channel grooves 701 on the main valve core 71 and the auxiliary valve core 71a rotate to be away from each other, the flow channel of the medium is completely closed, the flow channel 6 of the medium is completely closed at the moment, the fluid medium stops flowing out to the downstream, and therefore the effects of throttling, opening and closing the fluid are achieved.

The valve has the advantages of good sealing performance, long service life and more reliability in working. The ceramic valve core 7 main body of the invention is composed of two ceramic valve cores 7 with flow channel grooves 701 at opposite positions, the flow area of a flow channel port composed of the two flow channel grooves 701 is changed by the relative rotation of the two ceramic valve cores 7, the throttling, opening and closing of medium fluid are realized, and simultaneously, the flow channel port composed of the two flow channel grooves 701 is always at the middle position of the valve, thereby avoiding bias flow and scouring the valve shell and downstream pipelines; the invention can design the shapes of various runner channels 701 according to the requirements of customers, thereby realizing the adjustment of various flow characteristics. The main valve core 71 and the auxiliary valve core 71a rotate mutually to open and close the flow channel 6, the flow channel port formed by the flow channel grooves 701 is not an integral structure any more, and the flow channel grooves 701 are dislocated and disassembled when the flow channel is closed, so that the flow channel is not easy to be blocked, and the situation that the valve is blocked or stuck can be effectively relieved. The internal main components of the valve are made of ceramic materials, and the natural wear-resistant and corrosion-resistant properties of the ceramic are utilized, so that the wear-resistant and corrosion-resistant properties of the whole valve are realized, and the scouring and cavitation action of solid particles on the internal components and the flow passage of the valve under a high pressure difference environment is avoided, so that the damage to the internal components and the flow passage is reduced. The graphite ring 15 is used for forming a sealing structure between the valve cover and the valve body of the erosion-resistant double-core ceramic regulating valve, and the graphite ring 15 can always keep a sealing state in a high-temperature environment; therefore, the sealing performance of the valve is improved, the service life of the valve is prolonged, and the fireproof requirement of the valve can be met.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.

Claims

1. A washout resistant bi-center ceramic regulator valve, comprising:

the valve comprises a valve body (1), wherein a hollow cavity is formed inside the valve body (1), the top and the bottom of the valve body (1) are fixedly connected with an upper valve cover (2) and a lower valve cover (3) respectively, the part, higher than the upper valve cover (2), of the upper valve cover forms an upper platform (4), the center of the upper platform (4) is provided with a cavity communicated with the valve body (1), two sides of the valve body (1) are connected with flanges (5) respectively, and inner cavities of the valve body (1) and the flanges (5) form a flow channel (6) for medium circulation;

the ceramic valve core (7) is hermetically arranged in a cavity of the valve body (1) and symmetrically arranged along the central line of the valve body (1), wherein the ceramic valve core comprises a main valve core (71) positioned at the bottom of the upper platform (4) and an auxiliary valve core (71a) positioned at the other side, opposite sides of the main valve core (71) and the auxiliary valve core (71a) are respectively provided with a flow channel groove (701) which can be folded, and the main valve core (71) and the auxiliary valve core (71a) are rotationally connected through a transmission mechanism;

a valve stem (8) including a first end connected to an actuator and a second end passing through the cavity of the upper platform (4) and detachably connected to the top of the main spool (71), the valve stem (8) being configured to drive the main spool (71) to rotate to control the opening and closing of the flow passage (6).

2. The flush resistant bi-center ceramic regulator valve of claim 1, wherein: the second end of the valve rod (8) is provided with a connecting pin (81), the top centers of the main valve core (71) and the auxiliary valve core (71a) are provided with a connecting groove (702) matched with the connecting pin (81), and the connecting pin (81) of the valve rod (8) can be inserted into the connecting groove (702) to drive the main valve core (71) and the auxiliary valve core (71a) to rotate.

3. The flush resistant bi-center ceramic regulator valve of claim 2, wherein: the main valve core (71) and the flow channel groove (701) of the auxiliary valve core (71a) are circular after being matched.

4. The flush resistant bi-center ceramic regulator valve of claim 3, wherein: the inner walls of the two flanges (5) and the inner wall of the valve body (1) are both fixedly provided with lining structures for sealing.

5. The flush resistant bi-center ceramic regulator valve of claim 4, wherein: the valve rod (8) is connected with the upper platform (4) in a sealing mode through a stuffing box (11), corrosion-resistant stuffing (12) is filled between the inner side of the stuffing box (11) and the outer side of the valve rod (8), the corrosion-resistant stuffing (12) is pressed in the stuffing box (11) through a stuffing gland (13), and the stuffing gland (13) is connected with the upper platform (4) through fastening bolts (14).

6. The flush resistant bi-center ceramic regulator valve of claim 5; graphite rings (15) are hermetically arranged between the upper valve cover (2), the lower valve cover (3) and the valve body (1).