CN210218712U

CN210218712U - High-temperature electric cage type double-seat regulating valve

Info

Publication number: CN210218712U
Application number: CN201921043222.6U
Authority: CN
Inventors: Yunfeng Heng; 衡云峰; Qiang Sun; 孙强; Liuzhong Zhou; 周刘中
Original assignee: NANTONG POWER STATION VALVE CO Ltd
Current assignee: NANTONG POWER STATION VALVE CO Ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-03-31
Anticipated expiration: 2029-07-05

Abstract

The utility model relates to a governing valve technical field specifically discloses an electronic cage double-seat governing valve of high temperature, including valve body, valve cage, case, valve rod, valve gap and electric actuator, the valve cage is established in the valve body, and the case is established in the valve cage, and on the valve body was fixed to the valve gap, the valve rod lower extreme passed valve gap connection, and electric actuator is connected to the valve rod upper end, and the stand is connected with electric actuator, is equipped with sealed face between case and the valve cage, is equipped with V type filler group between valve rod and the valve gap. The utility model discloses the governing valve is the electronic cage double-seat governing valve of high temperature, and under the high temperature operating mode, protection actuating mechanism reduces the whole height of valve, reduces two sealed face allotment degrees of difficulty, and the site maintenance of being convenient for reduces valve operating force, increases whole life.

Description

High-temperature electric cage type double-seat regulating valve

Technical Field

The utility model belongs to the technical field of the governing valve, specifically a high temperature electric cage type double-seat governing valve.

Background

The regulating valve is also called a control valve, and in the field of industrial automation process control, the final control element for changing the process parameters of medium flow, pressure, temperature, liquid level and the like by power operation through receiving the control signal output by a regulating control unit.

The heat dissipation type cage type double-seat regulating valve in the prior art has some defects, and the machining difficulty is increased by adopting the lengthened valve cover in the prior art, so that the whole valve is higher and occupies a large space; the matching precision of the upper valve seat and the lower valve seat is high, and the allocation difficulty is high; rectangular graphite packing is adopted under a high-temperature working condition, and the operating torque is large.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electronic cage double-seat governing valve of high temperature reduces the temperature, strengthens sealedly, increases the whole life of valve.

For solving the technical problem, the utility model provides an electronic cage double-seater governing valve of high temperature, including valve body, valve cage, case, valve rod and valve gap, the valve gap is fixed on the valve body, the lower extreme of valve rod passes the valve gap with the case is connected, the valve cage sets up in the valve body, the case sets up in the valve cage, be equipped with on the valve cage with the sealed face of going up of case, the case lower part be equipped with the sealed face of going down of valve cage, it is equipped with the recess to go up sealed face below.

Further, the valve cover is provided with a heat dissipation groove, the upper end of the valve rod is connected with an electric actuating mechanism, the electric actuating mechanism is arranged above the valve cover, the electric actuating mechanism is connected with the valve cover through a stand column, a packing group is arranged between the top of the valve rod and the top of the valve cover, and the packing group comprises an upper rectangular woven flexible graphite packing and a middle V-shaped graphite packing group.

Furthermore, the upper ends of the stand columns are fixedly connected through an upper flange plate, and the lower ends of the stand columns are fixedly connected through a lower flange plate.

Furthermore, the upper end of the valve rod is connected with the electric actuator through a clamping block pair, and the clamping block pair is fastened by screws.

Furthermore, a stroke pointer is arranged on the clamping blocks, and a stroke scale opposite to the stroke pointer is arranged on the upright post.

Furthermore, a packing pad is arranged below the packing group, a packing pressing sleeve is arranged above the packing group, the bottom of the packing pad is tightly attached to the valve cover, and a packing pressing plate is arranged above the packing pressing sleeve.

Furthermore, the top of the valve core is provided with a connecting hole, the upper end of the connecting hole is a unthreaded hole, the lower end of the connecting hole is a threaded hole, the bottom end of the valve rod penetrates through the unthreaded hole to pass through the threaded hole, and the end part of the valve rod is welded and fixed with the inner wall of the valve core.

Further, the upper sealing surface and the lower sealing surface are both inclined surfaces.

Further, the stand is high temperature resistant material.

The utility model has the advantages that: the valve gap increases the radiating groove, the support adopts the stand type, choose for use high temperature resistant material, avoid high temperature failure, increase and air contact surface, increase the air convection, thereby reduce valve upper end temperature, reduce the influence of temperature to the executor, the sealed face downside of valve cage increases the recess design, the case is closed the back and is exerted force to sealed face, make sealed face department form the micro-deformation, more be favorable to sealing, use V type graphite packing to add the packing group that the graphite packing was woven to the lower lane rectangle, guarantee safety seal under the high temperature operating mode, and reduce the operating force, increase the whole life of valve.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the high-temperature electric cage type double-seat regulating valve of the present invention;

FIG. 2 is a schematic view of a sealing surface structure of the cage of the present invention;

fig. 3 is a schematic structural diagram of the packing set of the present invention.

In the figure: 1-valve body, 2-valve cage, 3-valve core, 4-valve rod, 5-valve cover, 6-packing pad, 7-packing group, 8-lower flange, 9-packing press sleeve, 10-packing press plate, 11-pair clamp block, 12-stroke pointer, 13-stroke scale, 14-upright column, 15-upper flange, 16-electric actuator, 17-upper sealing surface, 18-lower sealing surface and 19-groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In a specific embodiment of the present invention, as shown in fig. 1, a high temperature electric cage type double-seat control valve is specifically disclosed, wherein a valve body 1, a valve cage 2, a valve core 3, a valve rod 4, a valve cover 5, a packing pad 6, a packing set 7, a lower flange 8, a packing press sleeve 9, a packing press plate 10, a pair of clamping blocks 11, a stroke pointer 12, a stroke scale 13, a column 14, an upper flange 15, and an electric actuator 16 are arranged on the valve cage 2, an upper sealing surface 17 sealed with the valve core 3 is arranged on the valve cage 2, a lower sealing surface 18 sealed with the valve cage 2 is arranged on the lower portion of the valve core 3, the upper sealing surface 17 and the lower sealing surface 18 are both inclined surfaces, a groove 19 is arranged below the upper sealing surface 17, the groove is a C-shaped groove, the valve cage 2 is arranged in the valve body 1, the top of the valve core 3 and the lower section of the connecting hole of the valve rod, spot welding and fixing, and arranging the two parts together in a valve cage 2, wherein a valve cover 5 penetrates through a valve rod 4 and is arranged on a valve body 1; the packing gasket 6, the packing group 7 and the packing pressing sleeve 9 sequentially penetrate through the valve rod 4 to be installed in a packing box of the valve cover 5, the packing pressing plate 10 penetrates through the valve rod 4 to be installed on the packing pressing sleeve 9, the lower flange plate 8 is installed on the valve cover 5, two upright columns 14 are installed on the lower flange plate 8 through threads, the upper flange plate 15 is installed on the upright column 14 through an inner hexagon bolt, an electric actuating mechanism 16 is installed on the upper flange plate 15, threads are processed on a clamping block 11 and connected onto a screw rod of the valve rod 4 and the electric actuating mechanism 16, a stroke pointer 12 is installed on the clamping block 11, a stroke scale is installed on one of the upright columns 14, the electric actuating mechanism 16 drives the valve rod 4 to axially move through the clamping block 11, the valve rod 4 drives the valve core 3 to move in the valve cage 2 to realize an adjusting function, when a sealing surface of the valve core 3 is contacted with a sealing surface of the valve cage 2, the electric actuating mechanism 16 applies a, the two sealing surfaces of the valve core 3 are driven to apply force to the two sealing surfaces of the valve cage 2, the C-shaped groove (shown in figure 2) of the sealing surface of the valve cage 2 is slightly deformed under pressure, and the groove is easier to deform under the high-temperature working condition, so that the two sealing surfaces of the valve core 3 are tightly attached to the two sealing surfaces of the valve cage 2, and the sealing is more reliable.

The middle of the packing group 7 (see fig. 3) is provided with a V-shaped graphite packing group, flexible graphite packing is woven by upper and lower rectangles, the strength and the sealing effect of the packing group 7 are effectively guaranteed, when the packing pressing plate 10 is pressed, the packing group 7 is pressed and tensioned to realize sealing, the graphite is high in temperature resistance, corrosion resistance and abrasion resistance, the use requirement under long-term high-temperature working conditions can be met, the packing pressing plate 10 is pressed properly to be sealed due to the fact that the V-shaped packing is easy to open, the valve operation force is reduced, in the working state, the lower side of the packing group 7 is pressed by a medium, the middle V-shaped packing automatically expands to guarantee sealing reliability, the valve cover 5 is provided with a radiating groove, the stand column 14 is made of a high-temperature-resistant material according to the working condition temperature, the proper length is set, the contact area with air is.

The utility model relates to a theory of operation of electronic cage double-seat governing valve of high temperature: when the electric mechanism 16 drives the valve rod 4 to move upwards, the valve core 3 is gradually separated from the valve cage 2, the sealing surface is not sealed any more, the medium flows into the valve cage 2 and flows out from the outlet, when the valve core 3 moves downwards, the surface of the valve core 3 is intersected with the surface of the valve cage 2, the sealing surface is sealed, and the medium stops flowing.

The embodiment disclosed herein is merely a preferred embodiment, which should not be taken as limiting the scope of the invention, but is also included within the scope of the invention.

Claims

1. The utility model provides an electronic cage double seat governing valve of high temperature, includes valve body (1), valve cage (2), case (3), valve rod (4) and valve gap (5), valve gap (5) are fixed on valve body (1), the lower extreme of valve rod (4) passes valve gap (5) with case (3) are connected, its characterized in that, valve cage (2) set up in valve body (1), case (3) set up in valve cage (2), be equipped with on valve cage (2) with the sealed face of sealing (17) of case (3), case (3) lower part be equipped with the sealed lower sealing face (18) of valve cage (2), it is equipped with recess (19) to go up sealed face (17) below.

2. A high-temperature electric cage type double-seat regulating valve according to claim 1, characterized in that a heat dissipation groove is formed in the valve cover (5), an electric actuator (16) is connected to the upper end of the valve rod (4), the electric actuator (16) is arranged above the valve cover (5), the electric actuator (16) is connected to the valve cover (5) through a column (14), a packing set (7) is arranged between the valve rod (4) and the top of the valve cover (5), and the packing set comprises an upper rectangular woven flexible graphite packing and a middle V-shaped graphite packing set.

3. A hot electric cage type double-seat regulating valve according to claim 2, characterized in that the upper ends of the vertical posts (14) are fixedly connected through an upper flange (15), and the lower ends are fixedly connected through a lower flange (8).

4. A high temperature electric cage type double-seat regulating valve according to claim 2, characterized in that the upper end of the valve rod (4) is connected with the electric actuator (16) through a pair of clamping blocks (11), and the pair of clamping blocks are fastened by screws.

5. A high-temperature electric cage type double-seat regulating valve according to claim 4, characterized in that a stroke pointer (12) is arranged on the clamping block (11), and a stroke scale (13) opposite to the stroke pointer (12) is arranged on the upright post (14).

6. A high-temperature electric cage type double-seat regulating valve according to claim 2, characterized in that a packing pad (6) is arranged below the packing group (7), a packing pressing sleeve (9) is arranged above the packing group, the bottom of the packing pad (6) is tightly attached to the valve cover (5), and a packing pressing plate (10) is arranged above the packing pressing sleeve (9).

7. A high-temperature electric cage type double-seat regulating valve according to claim 1, characterized in that a connecting hole is formed in the top of the valve core (3), the upper end of the connecting hole is a unthreaded hole, the lower end of the connecting hole is a threaded hole, the bottom end of the valve rod (4) passes through the unthreaded hole and passes through the threaded hole, and the end part of the valve rod is welded and fixed with the inner wall of the valve core (3).

8. A high temperature electric cage double seat regulating valve according to claim 1, characterized in that the upper sealing surface (17) and the lower sealing surface (18) are both beveled.

9. A high temperature electric cage type double seat regulating valve according to claim 2, wherein the upright (14) is made of high temperature resistant material.