CN110206901A - An electric control valve - Google Patents

Abstract

The present invention relates to a kind of electric control valves, belong to valve technology field, the electric control valve includes vertical pipe, horizontal tube, flashboard and push-pull rod, the top end opening of vertical pipe and bottom end closure and the vertical tube wall are equipped with the inlet and outlet of face, water inlet and water outlet have been respectively and fixedly connected with a horizontal tube, flashboard, which slides up and down, to be mounted in vertical pipe and when flashboard is between water outlet and water inlet, the flashboard blocks water outlet, the top of vertical pipe is equipped with the sealing sealed that is open, push-pull rod passes through sealing and the bottom end of the push-pull rod is connected on flashboard.Using the above structure, water (flow) direction will not change in electric control valve provided by the invention, so that resistance to water-flow minimizes, it is in use not in the abnormal phenomenon such as noise, vibration.

Description

An electric regulating valve

technical field

The invention belongs to the technical field of valves, in particular to an electric regulating valve.

Background technique

The traditional electric regulating valve adopts a single-seat (or double-seat) cylindrical (or circular) structure. The valve stem drives the valve core to move up and down, so that the water flow in the pipeline flows up and down along the direction of the valve stem. The direction turns 90 degrees multiple times. As a result, not only the water flow resistance in the valve body becomes larger, but also the resistance of the valve core moving up and down is additionally increased. In addition, due to the obvious change of the flow direction of the water flow in the valve body, when the pressure difference between the water inlet and the water outlet of the valve body is large and the opening of the valve body is small, the water flow in the valve body will generate rapid turbulence, which is manifested on the outside of the valve as " Whistle phenomenon” and the vibration of the valve caused the pipeline to vibrate.

Contents of the invention

The invention provides an electric regulating valve, which is used to solve the technical problem that the water flow in the electric regulating valve changes obviously.

The present invention is achieved through the following technical solutions: an electric regulating valve, comprising a vertical pipe, a horizontal pipe, a shutter and a push-pull rod, the top end of the vertical pipe is open and the bottom end is closed, and the wall of the vertical pipe is provided with There is a water inlet and a water outlet facing each other. The water inlet and the water outlet are respectively fixed with one of the horizontal pipes. The shutter is installed in the vertical pipe by sliding up and down. When between the water outlet and the water inlet, the flashboard blocks the water outlet, the top of the vertical pipe is provided with a sealing part that seals its opening, and the push-pull rod passes through the sealing part And the bottom end of the push-pull rod is connected to the gate plate.

Further, in order to better realize the present invention, it also includes a throttle plate provided with a throttle hole, the cross-sectional shape of the throttle hole is roughly an isosceles trapezoid with a large top and a small bottom, and the apex angle of the isosceles trapezoid rounded corners;

The throttling plate is installed at the water outlet of the vertical pipe and the water outlet wraps the throttling hole.

Further, in order to better realize the present invention, the gate includes a vertical plate and a horizontal plate, the horizontal plate is vertically connected to the vertical plate, and the bottom end of the push-pull rod is detachably fixed to the said horizontal plate;

The throttling plate is located in the vertical pipe, and a first annular groove is provided on the side of the throttling plate away from the water outlet, and a first sealing ring is installed in the first annular groove. When the flashboard is located between the water outlet and the water inlet, the vertical plate is in close contact with the first sealing ring.

Further, in order to better realize the present invention, a through hole is provided on the horizontal plate, the bottom end of the push-pull rod passes through the through hole, and an upper nut and a lower nut are also included, the upper nut and the Both lower nuts are screwed to the bottom of the push-pull rod, and the upper nut and the lower nut clamp the horizontal plate.

Further, in order to better realize the present invention, the gate plate also includes two side plates, and the two side plates are respectively connected to the two ends of the vertical plate to form a "U"-shaped structure, and the " The opening of the U"-shaped structure is facing the water inlet, and the lower corners of the two side plates are provided with tenon joint surfaces, and the inner wall of the vertical pipe is provided with a limit block, and the limit block is located at the Below the water inlet, when the gate plate is blocked between the water inlet and the water outlet, the limit block is pressed against the tenon joint surface so that the vertical plate is close to the first seal lock up.

Further, in order to better realize the present invention, the inner wall of the vertical pipe is provided with a mounting groove around the water outlet, the throttle plate is provided with a counterbore, and the bottom of the mounting groove is provided with a screw. The hole also includes a countersunk screw, and the countersunk screw is screwed into the screw hole after passing through the countersunk hole.

Further, in order to better realize the present invention, the sealing part includes a cover plate and a second sealing ring, and the top end of the vertical pipe is provided with a sealing flange, and the sealing flange is provided with a The second annular groove of the vertical pipe, the second sealing ring is installed in the second annular groove, the cover plate is connected to the sealing flange by bolts and closely connected with the second sealing ring sticker, the cover plate is provided with a central hole for the push-pull rod to pass through.

Further, in order to better realize the present invention, the sealing part also includes a sealing sleeve and a skeleton oil seal, the sealing sleeve is fixed on the wall of the central hole, and the inner hole wall of the sealing sleeve There is an annular plate coaxial with it, the push-pull rod passes through the inner hole of the annular plate, the inner hole of the sealing sleeve is divided into an upper hole and a lower hole by the annular plate, and the skeleton oil seal installed in the lower hole.

Further, in order to better realize the present invention, the sealing part also includes a sealing filler and a cover, the sealing filler is filled in the upper hole, the cover is closed on the top end of the sealing shaft sleeve and The sealing packing is sealed in the upper hole, and the push-pull rod passes through the cover and the sealing packing.

Further, in order to better realize the present invention, the upper surface of the cover plate is also provided with installation holes for installing electric actuators.

Compared with the prior art, the present invention has the following beneficial effects:

The electric regulating valve provided by the present invention includes a vertical pipe, a horizontal pipe, a shutter and a push-pull rod. The top end of the vertical pipe is open and the bottom end is closed, and the pipe wall of the vertical pipe is provided with a facing water inlet. A horizontal pipe is connected to the water inlet and the water outlet, and the two horizontal pipes are respectively used as the water inlet pipe and the water outlet pipe. The above-mentioned shutter is installed in the vertical pipe by sliding up and down. When between the water inlets, the gate will block the water outlet. When the gate moves upward, the gate will release the water outlet, and the water can flow out from the water outlet. The top of the vertical pipe is provided with a sealing part to seal the top of the vertical pipe. The opening of the push-pull rod is sealed, the push-pull rod passes through the sealing part and the bottom end of the push-pull rod is connected to the gate plate. Drive the shutter to rise and fall, so as to control the opening and closing of the water outlet and the size of the opening and closing. With this structure, the flow direction of the water flow will always maintain a straight line during the whole process from entering the invention to flowing out, and will not change. In this way, The resistance of the water flow in the present invention is minimized, and the direction of the water flow is perpendicular to the lifting direction of the ram, so the water flow will not generate additional resistance to the lifting of the ram. In addition, since the direction of the water flow does not change, it does not matter whether it is the water inlet or the outlet. Regardless of the pressure difference between the nozzles, rapid turbulent flow will not occur in the valve body, so the present invention will not produce abnormal phenomena such as noise and vibration during use.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of electric regulating valve among the present invention;

Fig. 2 is a partial enlarged view of area A in Fig. 1;

Fig. 3 is a partial enlarged view of area B in Fig. 1;

Fig. 4 is another perspective view of the structure shown in Fig. 1;

Figure 5 is a partial view of the C-C section in Figure 4;

Fig. 6 is a top view structural schematic diagram of the electric control valve in the present invention;

Fig. 7 is the structural representation of flashboard among the present invention;

Fig. 8 is the data table that obtains during the electric control valve experiment described in embodiment 2;

FIG. 9 is a graph obtained from the table shown in FIG. 8 .

In the picture:

1-vertical pipe; 101-water inlet; 102-water outlet; 103-installation groove; 104-screw hole; 2-horizontal pipe; 3-gate; 301-vertical plate; 302-horizontal plate; Plate; 3031- tenon joint surface; 4- push-pull rod; 5- throttle plate; 501- throttle hole; 502- countersunk hole; 6- first sealing ring; Limiting block; 10-cover plate; 11-second sealing ring; 12-seal flange; 13-seal shaft sleeve; 14-skeleton oil seal; 15-ring plate; 16-seal packing; - mounting holes; 19 - external flange.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

Example 1:

This embodiment provides an electric regulating valve, including a vertical pipe 1, a horizontal pipe 2, a gate 3 and a push rod 4, the above-mentioned vertical pipe 1 can be a round pipe or a square pipe, preferably, it is a square pipe, and The bottom end of the vertical pipe 1 is closed and the top end passes through the opening. Specifically, a steel plate is welded to the bottom end of the vertical pipe 1 to close the bottom end of the vertical pipe 1 . The above-mentioned horizontal pipe 2 is a round pipe, and the end of the horizontal pipe 2 away from the vertical pipe 1 is provided with an external flange 19 for connecting with an external pipe. The pipe wall of the vertical pipe 1 is symmetrically provided with a water inlet 101 and a water outlet 102. As shown in FIG. for soldering. The axes of the two horizontal pipes 2 are collinear. In this way, the above-mentioned vertical pipe 1 can be used as a valve body, and the above-mentioned horizontal pipe 2 is an external connecting pipe.

The ram 3 is installed in the vertical pipe 1 by sliding up and down, and the external dimension of the ram 3 is adapted to the diameter of the vertical pipe 1. When the ram 3 is located between the water inlet 101 and the water outlet 102 During the interval, the gate 3 will block the water outlet 102. When the gate 3 moves upward, the water outlet 102 will be opened, and as the distance of the gate 3 moves up, the degree to which the water outlet 102 is opened It will also change to play a role in regulating the size of the water flow.

The top of the above-mentioned vertical pipe 1 is provided with a sealing portion for sealing the top opening of the vertical pipe 1, the above-mentioned push-pull rod 4 passes through the above-mentioned seal portion, and the bottom end of the push-pull rod 4 is connected to the gate plate 3, The top end of the push-pull rod 4 is provided with a connecting portion for connecting with an external electric actuator, and the connecting portion is specifically provided with a backstop groove or a pin hole. Specifically, the electric actuator is an electric actuator capable of outputting linear motion, such as a linear electric actuator. When the electric actuator drives the push-pull rod 4 up and down, it will drive the shutter 3 to slide up and down in the vertical pipe 1 , so as to open and close the above-mentioned water outlet 102 .

With the above-mentioned structure, the electric control valve provided by this embodiment can realize the opening and closing of the water outlet 102 and the control of the opening size by moving the gate plate 3 up and down, so as to play the function of an ordinary electric control valve, and the water flow is between two levels. In the process of circulation in the pipe 2 and the vertical pipe 1, the flow direction is always kept in a straight line without changing. In this way, the resistance of the water flow in the present invention is minimized, and the direction of the water flow is perpendicular to the lifting direction of the flashboard 3. Therefore, the water flow will not generate additional resistance to the lifting of the gate plate 3. In addition, since the direction of the water flow does not change, no matter what the pressure difference between the water inlet 101 and the water outlet 102 is, even if the water flow is too small, it will not change. Rapid turbulent flow phenomenon will be generated in the present invention, so the present invention will not have abnormal phenomena such as noise and vibration when in use.

Example 2:

The gap between the valve core and the valve seat of the traditional electric control valve is circular. When the valve core moves up and down in the valve seat, the water flow adjustment can basically be adjusted linearly. The solid part of the cylinder of the valve core moves out of the valve. After the seat, the adjustment linear effect begins to deteriorate. In actual use, when the pressure difference between the front and back of the valve changes, the flow characteristic curve will also change. When the valve opening is uniformly opened from zero to the maximum value, it is difficult to determine the change in the cross-sectional area of the valve opening gap or the corresponding fluid flow. to the corresponding linear change. In order to meet the linear change, the arc surface of the valve core can only be designed as a special curved surface under the condition that the pressure difference between the two ends of the valve is kept at a constant value to ensure the linear change of the valve opening gap section or the corresponding flow rate. In actual use , when the pressure difference between the front and rear ends of the valve is inconsistent with the design pressure difference, the clearance section corresponding to the special curved surface of the valve spool or the linear change of the flow rate will change. Changing the linear characteristic change into an equal percentage characteristic or a parabolic change cannot achieve a one-to-one correspondence with the linear characteristic of the valve opening degree. However, when the enterprise's heat exchange station realizes remote automatic control, it needs to realize that the valve opening is linearly consistent with the corresponding flow rate, so as to facilitate the accuracy of automatic control.

In order to solve the above technical problems, this embodiment is further improved on the basis of Embodiment 1. The electric control valve provided by this embodiment also includes a throttle plate 5, and a throttle hole 501 is provided on the throttle plate 5. Specifically, The throttling hole 501 is a through hole. As shown in the figure, the cross-sectional shape of the throttling hole is an isosceles trapezoid with a large top and a small bottom, and rounded corners are provided at the top corners of the isosceles trapezoid. The throttle plate 5 is installed at the water outlet 102 of the vertical pipe 1 , and the water outlet 102 wraps the throttle hole 501 . The water flows out through the throttle port 501 on the throttle plate 5, and the specific shape of the throttle port 501 can ensure that the opening and closing process of the gate plate 3 has a linear correspondence with the passing water flow, so that the enterprise can realize precise automatic control.

The data in the table shown in Figure 8 was obtained during the experiment of the electric control valve provided in this embodiment (note: the pressure difference of the gate valve is 1.05-1.1MP=0, the pressure difference of the plate in the high area is 0.85-0.75=0.1, and the pressure difference of the plate in the low area is The difference is 0.99-0.76=0.23), and the curve shown in Figure 9 is obtained.

Example 3:

This embodiment is used as a specific implementation of the above-mentioned embodiment. The gate plate 3 of the electric control valve provided in this embodiment includes a vertical plate 301 and a horizontal plate 302. The horizontal plate 302 is vertically connected to the vertical plate 301. The above-mentioned push-pull rod 4 The bottom end of the bottom is detachably fixed on the horizontal plate 302, like this, when the push-pull rod 4 lifts up and down, it will drive the horizontal plate 302 and the vertical plate 301 to move up and down together. Above-mentioned vertical plate 301 and horizontal plate 302 are all stainless steel plates, and both are connected together by welding.

The throttling plate 5 is installed in the vertical pipe 1, and a first annular groove is provided on the side of the throttling plate 5 away from the water outlet 102, and the first sealing ring 6 is installed in the first annular groove. When the flashboard 3 was located between the water outlet 102 and the water inlet 101, the above-mentioned vertical plate 301 was in close contact with the first sealing ring 6. At this time, the vertical plate 301 blocked the water outlet 102, because the first The function of the sealing ring 6 prevents water leakage between the vertical plate 301 and the throttling plate 5 .

With this structure, when the entire gate 3 moves up and down in the vertical pipe 1, it will only be subjected to the frictional force exerted by the first sealing ring 6 on it. Since the direction of the water flow is perpendicular to the vertical plate 301, the water flow will not flow in the vertical direction. The straight plate 301 and the horizontal plate 302 apply additional force, and the pressure difference between the water inlet 101 and the water outlet 102 will not produce an upward and downward force on the vertical plate 301 and the gate plate 3. In this way, the push-pull rod 4 used The adjustment force is small, the adjustment process is more stable, and the load torque and power of the electric actuator are reduced.

As a specific implementation of this embodiment, the horizontal plate 302 in this embodiment is provided with a vertical through hole, and the bottom end of the push-pull rod 4 passes through the through hole, and also includes an upper nut 7 and a lower nut 8. Both the nut 7 and the lower nut 8 are screwed on the bottom of the push-pull rod 4 and the upper nut 7 and the lower nut 8 clamp the above-mentioned horizontal plate 302, in this way the detachable fixed connection between the push-pull rod 4 and the horizontal plate 302 is realized. As a preferred embodiment, the number of horizontal plates 302 is two and distributed one above the other. The bottom end of the push-pull rod 4 passes through the upper and lower through holes from top to bottom. A horizontal plate 302 at the lower position, and the effect of the through hole on the upper horizontal plate 302 on the push-pull rod 4 can keep the push-pull rod 4 vertical.

As a more optimal implementation of this embodiment, the inner wall of the vertical pipe 1 in this embodiment is provided with a mounting groove 103 surrounding the above-mentioned water outlet 102, the throttle plate 5 is provided with a counterbore 502, and the bottom of the mounting groove 103 is provided with There is a screw hole 104, which also includes a countersunk screw. The countersunk screw is screwed into the screw hole 104 after passing through the countersunk hole 502. In this way, the above-mentioned throttling plate 5 is detachably fixed on the inner wall of the vertical pipe 1. Installation, and the throttle plate 5 is embedded in the inner pipe wall of the vertical pipe 1, so that when the vertical plate 301 moves up and down, the throttle plate 5 can be very firmly located in the installation groove 103, and the counterbore 302 and the counterbore The number of head screws is two, so that the throttling plate 5 is more firmly installed in the installation groove 103 .

Example 4:

This embodiment is used as a more optimal implementation of Embodiment 3. The gate plate 3 of the electric control valve provided by this embodiment also includes two side plates 303, and the two side plates 303 are respectively connected (welded) to the two sides of the vertical plate 301. The ends form a "U"-shaped structure, and the two side plates 303 and the horizontal plate 302 are also welded together, so that the strength of the entire gate 3 is greater.

During specific use, the opening of the above-mentioned "U"-shaped structure faces the above-mentioned water inlet 101 . And the lower ends of the two side plates 303 are respectively provided with a mortise joint surface 3031 at the corners away from the vertical plate 301. The tenon joint surface 3031 is an inclined plane, and the upper limit block 9 on the inner wall of the above-mentioned vertical pipe 1, the limit block 9 Protruding from the inner wall of the vertical pipe 1 , the limit block 9 is located below the water inlet 101 . When the gate plate 3 moves downward, the stop block 9 will gradually squeeze the tenon joint surface 3031, thereby pressing the gate plate 3 and the vertical plate 301 toward the water outlet 102, so that the vertical plate 301 can be tightly attached Closed on the surface of the first sealing ring 6 to achieve better sealing.

Example 5:

This embodiment is used as a specific implementation of the above-mentioned embodiment. The sealing part in this embodiment includes a cover plate 10 and a second sealing ring 11. The top end of the vertical pipe 1 is provided with a sealing flange 12. The sealing flange 12 Welded on the top of the vertical pipe 1, the sealing flange 12 is provided with a second annular groove enclosing the vertical pipe 1, the above-mentioned second sealing ring 11 is placed flat in the second annular groove, and the above-mentioned cover plate 10 passes through the The bolts are connected to the sealing flange 12 and are closely attached to the second sealing ring 11 . In this way, the second sealing ring 11 can seal the gap between the cover plate 10 and the sealing flange 12. The top opening of the vertical pipe 1 is sealed by the cover plate 10 , and a central hole is provided on the cover plate 10 for passing through the above-mentioned push-pull rod 4 .

Specifically, a circle of bolt through holes is provided on the cover plate 10 , and the bolts pass through the bolt through holes and are screwed to the sealing flange 12 .

More preferably, the cover plate 10 is further provided with a mounting hole 18 for mounting the electric actuator, and the mounting hole 18 is also a screw hole.

Embodiment 6:

This embodiment is further optimized on the basis of Embodiment 5. The sealing part in this embodiment also includes a sealing sleeve 13 and a skeleton oil seal 14, and the sealing sleeve 13 is affixed (welded) to the center hole of the cover plate 10 On the hole wall and coaxial with the central hole, the inner hole wall of the sealing sleeve 13 is provided with an annular plate 15 coaxial with it, and the annular plate 15 divides the inner hole of the sealing sleeve 13 into an upper hole and a lower hole, and Above-mentioned framework oil seal 14 just is installed in this lower hole, specifically, this framework oil seal 14 interference fit is contained in the lower hole and the inner hole of framework oil seal 14 is coaxial with lower hole, and above-mentioned push-pull rod 4 is from the inside of framework oil seal 14 through the hole. In this way, it can play the role of sealing the gap between the push-pull rod 4 and the lower hole wall, further enhancing the sealing performance of the present invention.

In order to achieve a better sealing effect, the sealing part in this embodiment also includes a sealing packing 16 and a cover 17. The sealing packing 16 is optimally selected from graphite packing, which is filled in the upper hole, and the above-mentioned sealing cover 17 covers Closed on the top of the sealing shaft sleeve 13 and the sealing packing 16 is compressed and sealed in the above-mentioned upper hole, the push-pull rod 4 passes through the cover 17 and the sealing packing 16.

With the above structure, the sealing part completely seals the top opening of the vertical pipe 1, which enhances the airtightness of the present invention.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (10)

1. An electric regulating valve, characterized in that: it comprises a vertical pipe, a horizontal pipe, a flashboard and a push-pull rod, the top of the vertical pipe is open and the bottom end is closed and the wall of the vertical pipe is provided with a facing The water inlet and the water outlet, the water inlet and the water outlet are respectively fixed with one of the horizontal pipes, the shutter is installed in the vertical pipe by sliding up and down, and when the shutter is located at the water outlet When between the water inlet and the water inlet, the shutter blocks the water outlet, and the top end of the vertical pipe is provided with a sealing part that seals its opening, the push-pull rod passes through the sealing part and the push-pull The bottom end of the pull rod is connected to the shutter. 2. An electric control valve according to claim 1, characterized in that: it also includes a throttle plate provided with a throttle hole, the cross-sectional shape of the throttle hole is roughly an isosceles trapezoid with a large top and a small bottom, Rounded corners are provided at the top corners of the isosceles trapezoid; The throttling plate is installed at the water outlet of the vertical pipe and the water outlet wraps the throttling hole. 3. An electric regulating valve according to claim 2, characterized in that: the gate plate comprises a vertical plate and a horizontal plate, the horizontal plate is vertically connected to the vertical plate, and the push-pull rod The bottom end is detachably fixed on the horizontal plate; The throttling plate is located in the vertical pipe, and a first annular groove is provided on the side of the throttling plate away from the water outlet, and a first sealing ring is installed in the first annular groove. When the flashboard is located between the water outlet and the water inlet, the vertical plate is in close contact with the first sealing ring. 4. An electric regulating valve according to claim 3, characterized in that: said horizontal plate is provided with a through hole, the bottom end of said push-pull rod passes through said through hole, and also includes an upper nut and a lower nut , the upper nut and the lower nut are both screwed to the bottom of the push-pull rod, and the upper nut and the lower nut clamp the horizontal plate. 5. An electric control valve according to claim 3, characterized in that: said gate plate further comprises two side plates, and said two side plates are respectively connected to the two ends of said vertical plate to form a "U" ""-shaped structure, the opening of the "U"-shaped structure faces the water inlet, the lower end corners of the two side plates are provided with tenon joint surfaces, and the inner wall of the vertical pipe is provided with a limit block , the limiting block is located below the water inlet, and when the shutter is blocked between the water inlet and the water outlet, the limiting block presses against the tenon joint surface so that the vertical The plate is tight against the first sealing ring. 6. An electric regulating valve according to claim 3, characterized in that: the inner wall of the vertical pipe is provided with a mounting groove around the water outlet, and the throttle plate is provided with a countersunk hole. Screw holes are provided at the bottom of the installation groove, and countersunk screws are also included, and the countersunk screws pass through the countersunk holes and are screwed into the screw holes. 7. An electric regulating valve according to any one of claims 1-6, characterized in that: the sealing part includes a cover plate and a second sealing ring, and the top end of the vertical pipe is provided with a sealing flange The sealing flange is provided with a second annular groove encircling the vertical pipe, the second sealing ring is installed in the second annular groove, and the cover plate is connected to the sealing flange by bolts. The flange is in close contact with the second sealing ring, and the cover plate is provided with a central hole through which the push-pull rod passes. 8. An electric control valve according to claim 7, characterized in that: the sealing part also includes a sealing sleeve and a skeleton oil seal, the sealing sleeve is fixed on the wall of the central hole, the The inner hole wall of the sealing sleeve is provided with an annular plate coaxial with it, the push-pull rod passes through the inner ring hole of the annular plate, and the annular plate divides the inner hole of the sealing sleeve into upper holes And the lower hole, the skeleton oil seal is installed in the lower hole. 9. An electric regulating valve according to claim 8, characterized in that: the sealing part also includes a sealing packing and a cover, the sealing packing is filled in the upper hole, and the cover is closed on the The top end of the sealing shaft sleeve seals the sealing packing in the upper hole, and the push-pull rod passes through the cover and the sealing packing. 10. The electric regulating valve according to claim 7, characterized in that: the upper surface of the cover plate is also provided with a mounting hole for mounting the electric actuator.