CN219159567U

CN219159567U - Regulating valve

Info

Publication number: CN219159567U
Application number: CN202222743143.4U
Authority: CN
Inventors: 贾伟; 孙佳丽; 沈彬; 朱京梅; 丁运博; 龚钊; 张卫; 薛卫光; 张志明; 王晨骏; 席立伟
Original assignee: Shanghai Eho Valve Co ltd
Current assignee: Shanghai Eho Valve Co ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-06-09
Anticipated expiration: 2032-10-19

Abstract

The utility model discloses a regulating valve, which comprises a valve body, a valve cover, a valve core and a valve rod, and is characterized in that an inlet flow channel is arranged on the side surface of the valve body, an outlet flow channel is arranged on the bottom surface of the valve body, a valve seat is arranged in the valve body, a sleeve is arranged above the valve seat, and the valve seat and the sleeve are communicated with the outlet flow channel; the sleeve is provided with a runner window, a runner hole is arranged below the runner window, and the runner window and the runner hole are both communicated with the inlet runner; the valve cover is arranged above the sleeve to press and fix the sleeve and the valve seat in the valve body; the valve core is arranged in the sleeve and is in sliding connection with the sleeve, an auxiliary valve core is arranged in the valve core, and a balance spring is arranged between the auxiliary valve core and the valve core; the valve rod is connected with the auxiliary valve core and drives the valve core to move. The utility model adopts a balance type valve core structure with an auxiliary valve core, and a balance spring is arranged to reduce unbalanced force, reduce the output force requirement of a driving mechanism and improve the shock resistance; and a runner hole is arranged below a runner window of the sleeve, so that the flow capacity requirement of the valve in a small opening degree is met.

Description

Regulating valve

Technical Field

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

Background

The regulating valve is also called a control valve, is a device for changing the medium flow by power operation in a process control system, changes the throttle area of the regulating valve by the displacement of a push rod of an actuating mechanism, achieves the aim of regulation, and is widely applied to the fields of nuclear power, military industry, metallurgy, papermaking, chemical industry, thermal power generation and the like at present, particularly to the high-temperature and high-pressure occasions of a thermal power plant, and has wide application.

The difference between the regulating valve applied to the nuclear power station and the regulating valve applied to the industry is that the regulating valve applied to the nuclear power station needs to meet the operability under normal environmental conditions and under irradiation environment and earthquake load. The valve core of the existing regulating valve is generally of an integrated structure, and when vibration or high pressure difference occurs, the valve core is stressed in an unbalanced manner, so that the driving mechanism needs to output larger force to drive the valve rod to drive the valve core to move; further, the output force requirement on the driving mechanism is increased, the weight of the driving mechanism is increased, and the shock resistance of the valve is affected; existing regulating valves typically determine the flow characteristics by the shape of the flow window of the sleeve, but the flow window cannot meet the flow capacity requirements at small valve openings. Accordingly, the prior art is still in need of improvement and development.

Disclosure of Invention

The utility model aims to solve the technical problems that the conventional regulating valve is insufficient in anti-seismic performance and cannot meet the flow capacity requirement when the valve is at a small opening.

The utility model provides a regulating valve which aims at solving the technical problems and comprises a valve body, a valve cover, a valve core and a valve rod, and is characterized in that an inlet flow passage is arranged on the side face of the valve body, an outlet flow passage is arranged on the bottom face of the valve body, a valve seat is arranged in the valve body, a sleeve is arranged above the valve seat, and the valve seat and the sleeve are communicated with the outlet flow passage; the sleeve is provided with a runner window, a runner hole is arranged below the runner window, and the runner window and the runner hole are both communicated with an inlet runner; the valve cover is arranged above the sleeve to press and fix the sleeve and the valve seat in the valve body; the valve core is arranged in the sleeve and is in sliding connection with the sleeve, an auxiliary valve core is arranged in the valve core, and a balance spring is arranged between the auxiliary valve core and the valve core; the valve rod is connected with the auxiliary valve core and drives the valve core to move.

Further, the top of case has been seted up and has been held the chamber, supplementary case sets up in holding the chamber, balance spring sets up in holding the chamber and is located and hold between chamber bottom surface and the supplementary case, supplementary case passes through the cylindric lock with the valve rod and is connected, be provided with the retaining ring that stops supplementary case to shift out and hold the chamber in holding the chamber.

Further, the outer diameter of the valve core is larger than the inner diameter of the valve seat; the bottom of the outer wall of the valve core is provided with a first sealing inclined plane; the top of the inner wall of the valve seat is provided with a second sealing inclined plane; the included angle between the first sealing inclined surface and the vertical surface is larger than the included angle between the second sealing surface and the vertical surface.

Further, the runner holes are multiple groups, the runner holes of the multiple groups are arranged at equal intervals along the circumference of the sleeve, and each runner hole comprises a plurality of runner holes which are longitudinally arranged.

Further, a first sealing groove is formed in the outer wall of the valve core, and a sealing ring is arranged in the first sealing groove.

Further, a second sealing groove is formed in the top of the outer wall of the sleeve, and a leaf spring is arranged in the second sealing groove; a valve body gasket is arranged at the joint of the valve cover and the valve body.

Further, a flow guide piece is arranged in the outlet flow channel, a boss is arranged on the outer wall of the top of the flow guide piece, a placing groove matched with the boss is formed in the valve body, and the flow guide piece is clamped into the placing groove through the boss to be fixed; the valve seat is positioned above the flow guide piece; and a winding gasket is arranged at the contact part of the valve seat and the guide piece and on the placing groove.

Further, a sealing structure is arranged at the joint of the valve rod and the valve cover, the sealing structure is arranged in a sealing gap between the valve cover and the valve rod, and the sealing structure comprises a guide sleeve, a filler, a spacer ring, a filler and a filler gland which are sequentially arranged from bottom to top; the sealing structure is pressed and fixed through a pressing plate; the pressure plate is secured to the valve cover by a stud, nut, and belleville spring.

Further, a connecting support is arranged on the valve cover, a travel scale is arranged on the connecting support, an indicator is arranged on the valve rod, and the position of the travel scale indicated by the indicator indicates the opening of the valve.

Further, the top end of the valve rod penetrates through the valve cover to be connected with a driving mechanism, and the driving mechanism is an electric executing mechanism.

Compared with the prior art, the utility model has the following beneficial effects: according to the regulating valve provided by the utility model, a balanced valve core structure with the auxiliary valve core is adopted, and the balance spring is arranged to reduce unbalanced force, so that the output force requirement of the driving mechanism is reduced, and the anti-seismic performance is improved; a runner hole is arranged below a runner window of the sleeve, so that the flow capacity requirement of the valve in a small opening degree is met; a certain angle difference exists between the valve core sealing surface and the valve seat sealing surface, so that the linear sealing of the valve core and the valve seat is realized, and the sealing performance is improved; the medium side bottom inlet and outlet angle structure is adopted, so that the overpressure protection requirement of the secondary side is met; a plate spring is arranged between the sleeve and the valve cover, the thermal expansion of the valve trim higher than the valve body is absorbed through the elastic deformation of the plate spring, and the additional stress on the middle flange fastener caused by the fact that the thermal expansion of the valve trim is larger than that of the valve body is eliminated.

Drawings

FIG. 1 is a schematic diagram of a regulating valve in an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a valve core according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a sleeve structure according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a valve seat and valve element sealing surface in an embodiment of the present utility model;

FIG. 5 is a schematic view of the joint between the sleeve and the valve cover and between the sleeve and the valve body in an embodiment of the utility model.

In the figure:

1. a valve body; 2. a flow guide; 3. winding a gasket; 4. a valve seat; 5. a valve core; 6. a balance spring; 7. a seal ring; 8. a retainer ring; 9. a valve cover; 10. a spacer ring; 11. a pressing plate; 12. a connecting bracket; 13. a driving mechanism; 14. an auxiliary valve core; 15. a cylindrical pin; 16. a sleeve; 17. a plate spring; 18. a valve stem; 19. guide sleeve; 20. a filler; 21. a packing gland; 22. a belleville spring; 23. an indicator; 24. a travel scale; 25. a nut; 26. a stud; 27. a valve body gasket; 28. a middle flange stud; 29. a middle flange nut; 51. a first seal groove; 161. a flow passage window; 162. a flow passage hole; 163. and a second seal groove.

Detailed Description

The utility model is further described below with reference to the drawings and examples.

In the present utility model, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Fig. 1 is a schematic diagram of a regulating valve in an embodiment of the utility model.

Referring to fig. 1, the regulating valve in the embodiment of the utility model comprises a valve body 1, a valve cover 9, a valve core 5 and a valve rod 18, and is characterized in that an inlet flow passage is arranged on the side surface of the valve body 1, an outlet flow passage is arranged on the bottom surface of the valve body 1, and a medium side bottom inlet/outlet angle structure is adopted to meet the overpressure protection requirement of a secondary side; the valve body 1 is internally provided with a valve seat 4, a sleeve 16 is arranged above the valve seat 4, and the valve seat 4 and the sleeve 16 are communicated with an outlet flow passage; the valve cover 9 is arranged above the sleeve 16 to tightly press and fix the sleeve 16 and the valve seat 4 in the valve body 1; the bonnet 9 is secured to the valve body 1 by means of a middle flange stud 28 and a middle flange nut 29.

Referring to fig. 2, in the regulating valve according to the embodiment of the present utility model, a valve core 5 is disposed in a sleeve 16 and is slidably connected with the sleeve 16, an auxiliary valve core 14 is disposed in the valve core 5, and a balance spring 6 is disposed between the auxiliary valve core 14 and the valve core 5; the valve rod 18 is connected with the auxiliary valve core 14 and drives the valve core 5 to move. By adopting the balance type valve core 5 structure with the auxiliary valve core 14, the balance spring 6 is arranged to reduce unbalanced force, reduce the output force requirement of the driving mechanism 13 and improve the shock resistance.

Specifically, the top of case 5 has seted up and has held the chamber, and supplementary case 14 sets up in holding the chamber, and balanced spring 6 sets up in holding the chamber and is located and hold between chamber bottom surface and the supplementary case 14, and supplementary case 14 passes through cylindric lock 15 with valve rod 18 to be connected, is provided with in holding the chamber and blocks the retaining ring 8 that supplementary case 14 shifted out the chamber of holding.

Preferably, the outer wall of the valve core 5 is provided with a first sealing groove 51, and a sealing ring 7 is arranged in the first sealing groove 51. Realizing dynamic sealing of the valve core 5 and the sleeve 16.

Referring to fig. 3, in the regulating valve according to the embodiment of the present utility model, a flow passage window 161 is provided on the sleeve 16, a flow passage hole 162 is provided below the flow passage window 161, and both the flow passage window 161 and the flow passage hole 162 are communicated with the inlet flow passage; a runner hole 162 is arranged below a runner window 161 of the sleeve 16, so that the flow capacity requirement of the valve in the small opening degree is met; the runner holes are multiple groups, the multiple groups of runner holes are arranged at equal intervals along the circumferential direction of the sleeve 16, and each group of runner holes comprises a plurality of runner holes which are longitudinally arranged.

Referring to fig. 4, in the regulating valve of the embodiment of the present utility model, the outer diameter of the valve core 5 is larger than the inner diameter of the valve seat 4; the bottom of the outer wall of the valve core 5 is provided with a first sealing inclined plane; the top of the inner wall of the valve seat 4 is provided with a second sealing inclined plane; the included angle alpha between the first sealing inclined surface and the vertical surface is larger than the included angle beta between the second sealing surface and the vertical surface; the valve core 5 is provided with a certain angle difference with the valve seat 4, so that the linear sealing between the valve core 5 and the valve seat 4 is realized, and the sealing performance is improved.

Referring to fig. 5, in the regulating valve of the embodiment of the present utility model, the top of the outer wall of the sleeve 16 is provided with a second sealing groove 163, the second sealing groove 163 is provided with a plate spring 17, and the thermal expansion of the valve trim higher than the valve body 1 is absorbed by the elastic deformation of the plate spring 17, so as to eliminate the additional stress on the middle flange fastener caused by the thermal expansion of the valve trim being greater than the thermal expansion of the valve body 1.

Preferably, a valve body gasket 27 is arranged at the joint of the valve cover 9 and the valve body 1, so that the sealing performance between the valve cover 9 and the valve body 1 is ensured.

Preferably, a guide piece 2 is arranged in the outlet flow passage, a boss is arranged on the outer wall of the top of the guide piece 2, a placing groove matched with the boss is arranged on the valve body 1, and the guide piece 2 is clamped into the placing groove through the boss to be fixed; the valve seat 4 is positioned above the flow guide piece 2; the contact place of the valve seat 4 and the flow guiding piece 2 and the placing groove are provided with winding gaskets 3. The sealing performance of the joint is ensured.

Specifically, a sealing structure is arranged at the joint of the valve rod 18 and the valve cover 9, the sealing structure is arranged in a sealing gap between the valve cover 9 and the valve rod 18, and the sealing structure comprises a guide sleeve 19, a filler 20, a spacer ring 10, a filler 20 and a filler gland 21 which are sequentially arranged from bottom to top; the sealing structure is pressed and fixed through a pressing plate 11; the pressure plate 11 is fixed to the valve cap 9 by a stud 26, a nut 25, and a belleville spring 22.

Specifically, the valve cover 9 is provided with a connecting bracket 12, the connecting bracket 12 is provided with a travel scale 24, the valve rod 18 is provided with an indicator 23, and the position of the travel scale 24 indicated by the indicator 23 indicates the opening of the valve.

Specifically, the tip of the valve stem 18 is connected to the driving mechanism 13 through the valve cap 9, and the driving mechanism 13 is an electric actuator.

In summary, the regulating valve provided by the utility model adopts the balance valve core 5 structure with the auxiliary valve core 14, and the balance spring 6 is arranged to reduce unbalanced force, reduce the output force requirement of the driving mechanism 13 and improve the shock resistance; a runner hole 162 is arranged below a runner window 161 of the sleeve 16, so that the flow capacity requirement of the valve in the small opening degree is met; a certain angle difference exists between the sealing surface of the valve core 5 and the sealing surface of the valve seat 4, so that the linear sealing of the valve core 5 and the valve seat 4 is realized, and the sealing performance is improved; the medium side bottom inlet and outlet angle structure is adopted, so that the overpressure protection requirement of the secondary side is met; a plate spring 17 is arranged between the sleeve 16 and the valve cover 9, and the elastic deformation of the plate spring 17 absorbs the thermal expansion of the valve trim higher than the valve body 1, so that the additional stress on the middle flange fastener caused by the fact that the thermal expansion of the valve trim is larger than the thermal expansion of the valve body 1 is eliminated.

While the utility model has been described with reference to the preferred embodiments, it is not intended to limit the utility model thereto, and it is to be understood that other modifications and improvements may be made by those skilled in the art without departing from the spirit and scope of the utility model, which is therefore defined by the appended claims.

Claims

1. The regulating valve comprises a valve body, a valve cover, a valve core and a valve rod, and is characterized in that an inlet flow passage is formed in the side face of the valve body, an outlet flow passage is formed in the bottom face of the valve body, a valve seat is arranged in the valve body, a sleeve is arranged above the valve seat, and the valve seat and the sleeve are communicated with the outlet flow passage; the sleeve is provided with a runner window, a runner hole is arranged below the runner window, and the runner window and the runner hole are both communicated with an inlet runner; the valve cover is arranged above the sleeve to press and fix the sleeve and the valve seat in the valve body; the valve core is arranged in the sleeve and is in sliding connection with the sleeve, an auxiliary valve core is arranged in the valve core, and a balance spring is arranged between the auxiliary valve core and the valve core; the valve rod is connected with the auxiliary valve core and drives the valve core to move.

2. The regulator valve of claim 1, wherein the top of the valve core is provided with a receiving cavity, the auxiliary valve core is arranged in the receiving cavity, the balance spring is arranged in the receiving cavity and is positioned between the bottom surface of the receiving cavity and the auxiliary valve core, the auxiliary valve core is connected with the valve rod through a cylindrical pin, and a retainer ring for blocking the auxiliary valve core from moving out of the receiving cavity is arranged in the receiving cavity.

3. The regulator valve of claim 1, wherein an outer diameter of the valve spool is greater than an inner diameter of the valve seat; the bottom of the outer wall of the valve core is provided with a first sealing inclined plane; the top of the inner wall of the valve seat is provided with a second sealing inclined plane; the included angle between the first sealing inclined surface and the vertical surface is larger than the included angle between the second sealing surface and the vertical surface.

4. The regulator valve of claim 1, wherein the plurality of sets of flow apertures are equally spaced circumferentially about the sleeve, each set of flow apertures including a plurality of longitudinally disposed flow apertures.

5. The regulator valve of claim 1, wherein the outer wall of the valve spool is provided with a first seal groove, and wherein a seal ring is disposed in the first seal groove.

6. The regulator valve of claim 1, wherein a second seal groove is provided in the top of the sleeve outer wall, and a leaf spring is provided in the second seal groove; a valve body gasket is arranged at the joint of the valve cover and the valve body.

7. The regulating valve according to claim 1, wherein a flow guiding piece is arranged in the outlet flow channel, a boss is arranged on the top outer wall of the flow guiding piece, a placing groove matched with the boss is arranged on the valve body, and the flow guiding piece is clamped into the placing groove through the boss to be fixed; the valve seat is positioned above the flow guide piece; and a winding gasket is arranged at the contact part of the valve seat and the guide piece and on the placing groove.

8. The regulating valve according to claim 1, wherein a sealing structure is arranged at the joint of the valve rod and the valve cover, the sealing structure is arranged in a sealing gap between the valve cover and the valve rod, and the sealing structure comprises a guide sleeve, a filler, a spacer ring, a filler and a filler gland which are sequentially arranged from bottom to top; the sealing structure is pressed and fixed through a pressing plate; the pressure plate is secured to the valve cover by a stud, nut, and belleville spring.

9. The regulator valve according to claim 1, wherein a connecting bracket is provided on the valve cover, a stroke scale is provided on the connecting bracket, an indicator is provided on the valve stem, and a position of the stroke scale indicated by the indicator indicates a valve opening.

10. The regulator valve of claim 1, wherein the top end of the valve stem is coupled to a drive mechanism through a valve cap, the drive mechanism being an electric actuator.