CN216242414U

CN216242414U - Electric regulating valve

Info

Publication number: CN216242414U
Application number: CN202122978189.XU
Authority: CN
Inventors: 胡小龙; 谢忠孝; 陈晓秋
Original assignee: Yongjia County Chenzheng Valve Manufacturing Co ltd
Current assignee: Yongjia County Chenzheng Valve Manufacturing Co ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-04-08
Anticipated expiration: 2031-11-29

Abstract

The utility model discloses an electric regulating valve which comprises a valve body, a valve plug, a valve cage, a valve cover and a valve rod, wherein the cylindrical valve cage is fixedly arranged in the middle of a flow passage in the valve body, a vertical through hole is formed in the side wall of the valve cage, the valve plug is connected with the valve cover in a sliding and sealing mode, the top of the valve body is fixedly connected with the valve cover, the valve rod is connected with the valve cover in a sliding and sealing mode, the lower end of the valve rod is fixedly connected with the valve plug, a first sealing block in sliding connection with the vertical through hole is fixedly arranged on the outer wall of the bottom of the valve plug, a second sealing block in sealing fit with the lower end of the first sealing block is fixedly arranged at the lower end of the vertical through hole, and a piston sealing ring in sliding fit with the inner wall of the valve cage is arranged on the outer wall of the top of the valve plug. When the valve plug is closed, the sealing performance between the lower part of the valve plug and the valve cage is good, the processing requirements on the valve plug and the upper sealing surface of the valve cage are effectively reduced, and the manufacturing cost of the valve is saved.

Description

Electric regulating valve

Technical Field

The utility model relates to a regulating valve, in particular to an electric regulating valve.

Background

The electric regulating valve is an important execution unit instrument in industrial automation process control, and is formed by connecting and combining an electric execution mechanism and a regulating valve, then mechanically connecting, assembling, debugging and installing the electric execution mechanism, wherein the electric execution mechanism drives the valve to change the sectional area between the valve core and the valve seat by receiving a control signal so as to control the process parameters of flow, temperature, pressure and the like of a pipeline medium, thereby realizing an automatic regulating function. The electric regulating valve adopts the electric actuating mechanism to drive the valve plug, the cut-off and the regulation of the front flow and the back flow are realized, the blocking and the conduction of a fluid medium are realized through the relative positions of the valve plug and the valve cage in the electric regulating valve, the blocking effect of the electric regulating valve on the fluid medium is closely related to the sealing, however, the valve plug in the electric regulating valve has relative motion with the valve cage under the action of the electric actuating mechanism, and the sealing requirement between the valve plug and the valve cage is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art and provides an electric regulating valve which can improve the sealing performance between a valve plug and a valve cage.

The utility model adopts the technical scheme for solving the technical problems that: the utility model provides an electrical control valve, includes valve body, valve plug, valve cage, valve gap and valve rod, the fixed tube-shape that is provided with in middle part of the interior runner of valve body the valve cage is equipped with perpendicular through-hole on the lateral wall of valve cage, and sliding seal is connected with in the valve cage the valve plug, the top fixed connection of valve body the valve gap, sliding seal is connected with on the valve gap the valve rod, the valve rod lower extreme with valve plug fixed connection, fixedly on the bottom outer wall of valve plug be provided with erect through-hole sliding connection's first sealed piece, the fixed second sealed piece that is equipped with and seals up complex with first sealed piece lower extreme mutually of the lower extreme of erecting the through-hole, install on the top outer wall of valve plug with valve cage inner wall sliding fit's piston seal circle.

In order to further improve, be equipped with on the lateral wall of valve plug with first sealed piece sliding connection's accepting groove, accepting groove and first sealed piece and between be equipped with reset spring.

Further perfection, be equipped with the double-screw bolt in the accepting groove, be equipped with the counter bore on the first sealed piece, be equipped with stop screw in the counter bore, stop screw with the double-screw bolt carries out screw thread fixed connection.

Further perfect, the upper and lower both ends of first sealed piece are equipped with first inclined plane and second inclined plane respectively, the upper end of second sealed piece is equipped with the third inclined plane of laminating mutually with the second inclined plane.

Further perfecting, a sealing assembly is arranged between the valve cover and the valve rod, and the sealing assembly comprises an adjusting bolt, a pressing plate, a pressing sleeve and sealing filler; the sealing filler is composed of a lower pressing sealing ring on the upper layer, six V-shaped sealing rings on the middle layer and a supporting sealing ring on the lower layer.

Further perfection, clamp plate and pressure cover are all established on the valve rod, the clamp plate is located the top of pressing the cover, the one end of clamp plate is passed through adjusting bolt with valve gap fixed connection, can dismantle fixedly connected with extension spring between the other end of clamp plate and the valve gap.

The utility model has the beneficial effects that: according to the utility model, the outer walls of the top and the bottom of the valve plug are respectively provided with the piston sealing ring and the first sealing block, when the valve plug is closed, the upper part of the valve plug and the upper part of the valve cage form sealing through the piston sealing ring, so that a fluid medium can be completely blocked, further, the fluid medium is prevented from leaking in the upper part, the sealing effect is good, the lower part of the valve plug and the lower part of the valve cage form sealing through the matching of the first sealing block and the second sealing block at the lower end of the vertical through hole, the sealing performance of the matching of the lower end of the valve plug and the valve seat on the valve cage is effectively improved, the processing requirements on the valve plug and the sealing surface on the valve cage are reduced, and the manufacturing cost of the valve is saved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure at A in FIG. 1;

FIG. 3 is a schematic view of the structure at B in FIG. 1;

description of reference numerals: 1. the valve comprises a valve body, 2, a valve plug, 3, a valve cage, 4, a valve cover, 5, a valve rod, 6, a vertical through hole, 7, a first sealing block, 8, a second sealing block, 9, a piston sealing ring, 10, an accommodating groove, 11, a reset spring, 12, a stud, 13, a counter bore, 14, a limiting screw, 15, a first inclined plane, 16, a second inclined plane, 17, a third inclined plane, 18, an adjusting bolt, 19, a pressing plate, 20, a pressing sleeve, 21, a pressing sealing ring, 22, a V-shaped sealing ring, 23, a supporting sealing ring, 24 and a tension spring.

Detailed Description

The utility model will be further described with reference to the accompanying drawings in which:

referring to figures 1-2: the electric regulating valve in the embodiment comprises a valve body 1, a valve plug 2, a valve cage 3, a valve cover 4 and a valve rod 5, the middle part of the inner flow passage of the valve body 1 is fixedly provided with a cylindrical valve cage 3, the side wall of the valve cage 3 is provided with a vertical through hole 6, the valve cage 3 is connected with the valve plug 2 in a sliding and sealing way, the top of the valve body 1 is fixedly connected with the valve cover 4, the valve rod 5 is connected on the valve cover 4 in a sliding and sealing way, the lower end of the valve rod 5 is fixedly connected with the valve plug 2, the upper end of the valve rod 5 is connected with an electric actuating mechanism, a first sealing block 7 which is connected with the vertical through hole 6 in a sliding way is fixedly arranged on the outer wall of the bottom of the valve plug 2, the lower end of the vertical through hole 6 is fixedly provided with a second sealing block 8 which is in sealing fit with the lower end of the first sealing block 7, and a piston sealing ring 9 in sliding fit with the inner wall of the valve cage 3 is arranged on the outer wall of the top of the valve plug 2. When the valve works, the electric actuating mechanism drives the valve plug 2 on the valve cage 3 to slide upwards through the valve rod 5 to open, and flowing media in the valve body 1 pass through the inner hole and the vertical through hole 6 of the valve cage 3; when electric actuator passes through valve rod 5 and drives 2 downslide of valve plug on the valve cage 3 and close, form sealedly through piston seal ring 9 between 2 upper portions of valve plug and the 3 upper portions of valve cage, can block fluid medium completely, and then avoid fluid medium to leak in upper portion, it is sealed effectual, form sealedly through first sealed piece 7 and the second sealed piece 8 cooperation of perpendicular through-hole 6 lower extreme between 2 lower parts of valve plug and the 3 lower parts of valve cage, the effectual 2 lower extremes of valve plug and the 3 upper valve seats complex sealing performance that have improved, thereby the processing requirement to sealed face on 2 and the valve cage 3 of valve plug has been reduceed, valve manufacturing cost has been saved.

Be equipped with on the lateral wall of valve plug 2 with first sealed piece 7 sliding connection's accepting groove 10, accepting groove 10 and first sealed piece 7 and between be equipped with reset spring 11. When the valve plug 2 and the valve cage 3 are assembled, the first sealing block 7 can be pressed into the containing groove 10 until the position of the vertical through hole 6 is reached, and the first sealing block 7 can be bounced under the action of the return spring 11 and is in sliding sealing fit with the vertical through hole 6.

A stud 12 is arranged in the accommodating groove 10, a counter bore 13 is arranged on the first sealing block 7, a limit screw 14 is arranged in the counter bore 13, and the limit screw 14 is fixedly connected with the stud 12 in a threaded manner. The limit screw 14 and the stud 12 can limit the formation of the first sealing block 7 in the receiving groove 10, and prevent the first sealing block 7 from being separated from the receiving groove 10.

The upper and lower both ends of first sealed piece 7 are equipped with first inclined plane 15 and second inclined plane 16 respectively, and first inclined plane 15 and second inclined plane 16 can guide pressing of first sealed piece 7, make things convenient for the dismouting between valve plug 2 and the valve cage 3, the upper end of second sealed piece 8 is equipped with the third inclined plane 17 of laminating mutually with second inclined plane 16, can further improve sealing performance.

As shown in fig. 3, a sealing assembly is arranged between the valve cover 4 and the valve rod 5, and comprises an adjusting bolt 18, a pressure plate 19, a pressure sleeve 20 and sealing packing; the sealing filler is composed of a lower pressing sealing ring 21 on the upper layer, six V-shaped sealing rings 22 on the middle layer and a supporting sealing ring 23 on the lower layer. After the pressing sealing ring 21 is subjected to the axial pressure of the pressing sleeve 20, the lip tip of the V-shaped sealing ring 22 can be uniformly deformed in the radial direction under the action of the supporting sealing ring 23 according to stress analysis, and pressure is generated at the contact part of the lip tip, the valve rod 5 and the sealing cavity. When the working pressure of the medium rises, the lip tip changes the contact shape and increases the contact pressure, so that the lip is combined with the sealed surface more tightly. The effect of simultaneously sealing the valve rod and the packing cavity is achieved by using smaller pressure, and the V-shaped sealing ring 22 deforms uniformly, so that the friction coefficient between the V-shaped sealing ring and the valve rod can be controlled by axial pressing force.

Pressing plate 19 and pressure cover 20 all overlap and establish on valve rod 5, pressing plate 19 is located the top of pressing cover 20, pressing plate 19's one end is passed through adjusting bolt 18 with valve gap 4 fixed connection, can dismantle fixedly connected with extension spring 24 between pressing plate 19's the other end and the valve gap 4, extension spring 24 and adjusting bolt 18's cooperation can be long-time to the radial elastic pressure of seal packing production, can effectual improvement seal packing's sealed effect, can effectually solve 18 not hard up problems that cause seal packing to become invalid of adjusting bolt.

While the utility model has been shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

Claims

1. The utility model provides an electrical control valve, includes valve body (1), valve plug (2), valve cage (3), valve gap (4) and valve rod (5), the fixed tube-shape that is provided with in valve body (1) internal flow way middle part valve cage (3) are equipped with perpendicular through-hole (6) on the lateral wall of valve cage (3), and sliding seal is connected with in valve cage (3) valve plug (2), the top fixed connection of valve body (1) valve gap (4), sliding seal is connected with on valve gap (4) valve rod (5), valve rod (5) lower extreme with valve plug (2) fixed connection, its characterized in that: the fixed bottom outer wall of valve plug (2) be provided with erect through-hole (6) sliding connection's first sealed piece (7), the lower extreme of erecting through-hole (6) is fixed be equipped with first sealed piece (7) lower extreme looks seal complex second sealed piece (8), install on the top outer wall of valve plug (2) with valve cage (3) inner wall sliding fit's piston seal circle (9).

2. An electrically actuated regulator valve according to claim 1 wherein: be equipped with on the lateral wall of valve plug (2) with first sealed piece (7) sliding connection's accepting groove (10), accepting groove (10) and first sealed piece (7) and between be equipped with reset spring (11).

3. An electrically actuated regulator valve according to claim 2 wherein: the screw bolt sealing device is characterized in that a screw bolt (12) is arranged in the accommodating groove (10), a counter bore (13) is formed in the first sealing block (7), a limit screw (14) is arranged in the counter bore (13), and the limit screw (14) is fixedly connected with the screw bolt (12) in a threaded mode.

4. An electrically actuated regulator valve according to claim 2 wherein: the upper end and the lower end of the first sealing block (7) are respectively provided with a first inclined plane (15) and a second inclined plane (16), and the upper end of the second sealing block (8) is provided with a third inclined plane (17) which is attached to the second inclined plane (16).

5. An electrically actuated regulator valve according to claim 1 wherein: a sealing assembly is arranged between the valve cover (4) and the valve rod (5), and comprises an adjusting bolt (18), a pressure plate (19), a pressure sleeve (20) and sealing packing; the sealing packing consists of a lower pressing sealing ring (21) on the upper layer, six V-shaped sealing rings (22) on the middle layer and a supporting sealing ring (23) on the lower layer.

6. An electrically actuated regulator valve according to claim 5 wherein: clamp plate (19) and pressure cover (20) are all established and are established on valve rod (5), clamp plate (19) are located the top of pressing cover (20), the one end of clamp plate (19) is passed through adjusting bolt (18) with valve gap (4) fixed connection, can dismantle fixedly connected with extension spring (24) between the other end of clamp plate (19) and valve gap (4).