A sleeve type abrasive wheel adjusting valve control device

Abstract

The utility model provides a sleeve type abrasive wheel regulating valve control device relates to petroleum water injection flow control technical field. The device includes casing, flow detection control module, sleeve type abrasive wheel adjusting mechanism, electric actuator, coupling and explosion -proof hose. The casing has angular type overflow channel, and the lower side horizontal electrode installation structure is equipped, and the upper side right angle is equipped with valve core installation structure. Flow detection control module contains electrode assembly, press flange, table head branch pipe and intelligent table head, and the signal repeater in table head branch pipe can enhance electrode assembly signal and is transmitted to intelligent table head. Sleeve type abrasive wheel adjusting mechanism includes sleeve and valve core subassembly, and valve core subassembly has upper alloy sheet, lower alloy sheet, valve rod and bearing assembly, and valve rod drives upper alloy sheet to adjust flow. Electric actuator is connected valve rod through coupling, and explosion -proof hose connects intelligent table head and electric actuator. The device improves small flow pulse signal monitoring precision, realizes small flow closed loop accurate regulation under high pressure petroleum water injection working condition.

Description

Technical Field

[0001] This utility model relates to the field of oil injection water flow control technology, and more specifically, to a sleeve-type grinding wheel regulating valve control device. Background Technology

[0002] In the oil extraction industry, precise control of the water injection flow rate into the formation is crucial for optimizing reservoir pressure and improving oil recovery. With increasingly sophisticated water injection processes, especially under high-pressure conditions requiring extremely low flow rates, traditional flow control valves face significant challenges in achieving accurate and stable control within small flow ranges. The high-pressure environment exacerbates the difficulty of flow control; even minute changes in opening can cause significant flow fluctuations.

[0003] Currently, the commonly used sleeve-type regulating valves regulate flow by rotating the valve core within the sleeve via the valve stem, thus changing the orifice area. These valves are typically equipped with intelligent gauges and electric actuators to form a closed-loop control system. However, under high-pressure, low-flow conditions, existing technology has significant shortcomings: firstly, the minute rotation of the valve core is difficult to control precisely, and direct friction easily leads to wear on critical components (such as the housing); more importantly, the original voltage pulse signal generated by the conductive liquid flowing through the valve at extremely low flow rates is extremely weak and unstable. This makes it difficult for the intelligent gauge, which relies on detecting this pulse signal, to acquire the signal at low flow rates, resulting in a significant decrease in accuracy. Consequently, the entire closed-loop control system cannot effectively adjust based on accurate low-flow feedback signals, ultimately failing to achieve the expected stable and precise low-flow control.

[0004] In summary, the technical problem of how to solve the inaccurate monitoring of small flow rates by intelligent meters due to weak flow pulse signals in high-pressure oil injection environments, thus preventing the realization of closed-loop automatic and precise flow regulation and control, is an urgent issue that needs to be addressed. Utility Model Content

[0005] The main objective of this invention is to provide a sleeve-type grinding wheel regulating valve control device, which at least solves the technical problem that the intelligent meter cannot accurately monitor small flow rates due to the weak flow pulse signal in a high-pressure oil injection environment, thus making it impossible to achieve closed-loop automatic precise flow regulation control. This significantly improves the monitoring accuracy of the intelligent meter for small flow pulse signals and realizes closed-loop automatic precise regulation control of small flow rates under high-pressure oil injection conditions.

[0006] To achieve the above objectives, this utility model provides a sleeve-type grinding wheel regulating valve control device. The device includes: a housing, a flow detection and control module, a sleeve-type grinding wheel regulating mechanism, an electric actuator, a coupling, and an explosion-proof hose. An angled flow channel is formed inside the housing. A horizontal electrode mounting cylinder is provided on the lower side of the housing, and a vertical valve core mounting cylinder is provided at a right angle on the upper side. The flow detection and control module includes an electrode assembly, a clamping flange, a meter branch pipe, and a smart meter. The electrode assembly is installed in the electrode mounting cylinder. The clamping flange is connected to the housing and clamps and fixes the electrode assembly. One end of the meter branch pipe is connected to the clamping flange, and the other end is connected to the smart meter. A signal repeater is provided inside the meter branch pipe. The input terminal of the signal repeater is connected to the electrode assembly, and the output terminal of the signal repeater is connected to the smart meter. The sleeve-type grinding wheel adjustment mechanism includes a sleeve and a valve core assembly. The sleeve is fixedly installed in the valve core mounting cylinder, and the valve core assembly is installed inside the sleeve. The valve core assembly includes an upper alloy plate, a lower alloy plate, a valve stem, and a bearing assembly. The end faces of the upper alloy plate and the lower alloy plate are fitted together. The valve stem is driven and connected to the upper alloy plate, and the bearing assembly supports the valve stem. One end of the coupling is connected to the output shaft of the electric actuator, and the other end of the coupling is connected to the valve stem. One end of the explosion-proof hose is connected to the smart meter, and the other end of the explosion-proof hose is connected to the electric actuator.

[0007] Specifically, the control device further includes a flange; the sleeve is pressed and fixed to the valve core mounting cylinder by the flange; a sealing ring is provided between the outer wall of the sleeve and the inner wall of the valve core mounting cylinder.

[0008] Specifically, the sleeve has a flow guide hole on its side wall and a through hole at its bottom;

[0009] The flow guide hole connects the valve core assembly to the outlet of the angled flow channel;

[0010] The through hole connects the guide hole and the inlet of the angled flow channel.

[0011] Specifically, the valve core assembly further includes:

[0012] A lower positioning pin is fixed to the bottom of the sleeve and passes through the lower alloy sheet;

[0013] The upper positioning pin is fixed to the bottom of the valve stem and passes through the upper alloy plate.

[0014] Specifically, the bearing assembly includes:

[0015] A thrust ball bearing is sleeved on the valve stem and fits against the valve stem shoulder;

[0016] A deep groove ball bearing is fitted onto the valve stem;

[0017] A retaining ring is fitted onto the valve stem and located at the upper end of the deep groove ball bearing;

[0018] Tighten the nut and thread it onto the sleeve to press the thrust ball bearing against the valve stem shoulder.

[0019] Specifically, the outer wall of the clamping nut is provided with an external hexagonal operating part; the deep groove ball bearing and the retaining ring are installed in the stepped hole inside the clamping nut.

[0020] Specifically, the control device further includes a magnet and a magnet cap; the side wall of the housing is provided with a magnet mounting cavity; the magnet is encapsulated in the magnet mounting cavity by the magnet cap; the magnetic field direction of the magnet is perpendicular to the angular flow channel.

[0021] Specifically, the coupling is a rigid coupling with square holes at both ends; the top of the valve stem is a square shaft end that matches the square holes; and the output shaft of the electric actuator is a square shaft end that matches the square holes.

[0022] Specifically, the control device further includes a bracket, the lower end of which is fixed to the flange, and the upper end of which is fixed to the electric actuator.

[0023] Specifically, the upper outer wall of the sleeve is provided with a disassembly annular groove to facilitate disassembly of the sleeve; a two-stage sealing ring is provided between the bottom of the valve core assembly and the inner wall of the sleeve.

[0024] This utility model provides a sleeve-type grinding wheel regulating valve control device, which includes a housing, a flow detection and control module, a sleeve-type grinding wheel regulating mechanism, an electric actuator, a coupling, and an explosion-proof hose. The housing has an angled flow channel inside, a horizontal electrode mounting structure on the lower side, and a vertical valve core mounting structure at the upper right angle. The flow detection and control module includes an electrode assembly, a clamping flange, a meter head branch pipe, and an intelligent meter head. A signal repeater inside the meter head branch pipe amplifies the signal from the electrode assembly and transmits it to the intelligent meter head. The sleeve-type grinding wheel regulating mechanism includes a sleeve and a valve core assembly. The valve core assembly has an upper alloy plate, a lower alloy plate, a valve stem, and a bearing assembly. The valve stem drives the upper alloy plate to regulate the flow. The electric actuator is connected to the valve stem via a coupling, and the explosion-proof hose connects the intelligent meter head and the electric actuator. This device effectively solves the problem of inaccurate monitoring of small flow rates under high-pressure oil injection conditions, significantly improves the accuracy of the intelligent meter head in monitoring small flow pulse signals, and realizes closed-loop automatic precise regulation and control of small flow rates under high-pressure oil injection conditions. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0026] Figure 1 This is a schematic diagram of the structure of a sleeve-type grinding wheel regulating valve control device, which is an optional embodiment of this utility model.

[0027] Figure 2 This is a schematic diagram of the valve core assembly structure of a sleeve-type grinding wheel regulating valve control device, which is optional according to an embodiment of this utility model.

[0028] 10. Housing; 102. Electrode mounting cylinder; 103. Valve core mounting cylinder; 20. Flow detection and control module; 21. Electrode assembly; 22. Compression flange; 23. Meter head branch pipe; 24. Intelligent meter head; 231. Signal repeater; 30. Sleeve-type grinding wheel adjustment mechanism; 31. Sleeve; 32. Valve core assembly; 321. Upper alloy plate; 322. Lower alloy plate; 323. Valve stem; 324. Bearing assembly; 40. Electric actuator; 50. Coupling; 60. Explosion-proof hose; 70. Flange; 325. Lower locating pin; 326. Upper locating pin; 3241. Thrust ball bearing; 3242. Deep groove ball bearing; 3243. Retaining ring; 3244. Compression nut; 80. Magnet; 81. Magnet cap; 90. Bracket. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] like Figure 1 and Figure 2As shown, a sleeve-type grinding wheel regulating valve control device according to an embodiment of this utility model includes: a housing 10, a flow detection and control module 20, a sleeve-type grinding wheel regulating mechanism 30, an electric actuator 40, a coupling 50, and an explosion-proof hose 60. An angled flow channel is formed inside the housing 10. A horizontal electrode mounting cylinder 102 is provided on the lower side of the housing 10, and a vertical valve core mounting cylinder 103 is provided at a right angle on the upper side. The flow detection and control module 20 includes an electrode assembly 21, a clamping flange 22, a meter head branch pipe 23, and a smart meter head 24. The electrode assembly 21 is installed inside the electrode mounting cylinder 102. The clamping flange 22 is connected to the housing 10 and clamps and fixes the electrode assembly 21. One end of the meter head branch pipe 23 is connected to the clamping flange 22, and the other end is connected to the smart meter head 24. A signal repeater 231 is provided inside the meter head branch pipe 23. The input terminal of the 1 is connected to the electrode assembly 21, and the output terminal of the signal repeater 231 is connected to the smart meter 24; the sleeve-type grinding wheel adjustment mechanism 30 includes a sleeve 31 and a valve core assembly 32. The sleeve 31 is fixedly installed inside the valve core mounting cylinder 103, and the valve core assembly 32 is installed inside the sleeve 31. The valve core assembly 32 includes an upper alloy plate 321, a lower alloy plate 322, a valve stem 323, and a bearing assembly 324. The end faces of the upper alloy plate 321 and the lower alloy plate 322 are fitted together. The valve stem 323 drives and connects to the upper alloy plate 321, and the bearing assembly 324 supports the valve stem 323; one end of the coupling 50 is connected to the output shaft of the electric actuator 40, and the other end of the coupling 50 is connected to the valve stem 323; one end of the explosion-proof hose 60 is connected to the smart meter 24, and the other end of the explosion-proof hose 60 is connected to the electric actuator 40.

[0031] Specifically, the control device further includes a flange 70; the sleeve 31 is pressed and fixed inside the valve core mounting cylinder 103 by the flange 70; a sealing ring is provided between the outer wall of the sleeve 31 and the inner wall of the valve core mounting cylinder 103.

[0032] Specifically, the sleeve 31 has a guide hole on its side wall and a through hole at its bottom; the guide hole connects the valve core assembly 32 with the outlet of the angled flow channel; the through hole connects the guide hole with the inlet of the angled flow channel.

[0033] Specifically, the valve core assembly 32 further includes:

[0034] The lower positioning pin 325 is fixed to the bottom of the sleeve 31 and passes through the lower alloy sheet 322;

[0035] The upper positioning pin 326 is fixed to the bottom of the valve stem 323 and passes through the upper alloy plate 321.

[0036] Specifically, the bearing assembly 324 includes:

[0037] A thrust ball bearing 3241 is sleeved on the valve stem 323 and fits against the valve stem shoulder;

[0038] A deep groove ball bearing 3242 is sleeved on the valve stem 323;

[0039] A retaining ring 3243 is sleeved on the valve stem 323 and located at the upper end of the deep groove ball bearing 3242;

[0040] The clamping nut 3244 is threadedly connected to the sleeve 31, pressing the thrust ball bearing 3241 against the valve stem shoulder.

[0041] Specifically, the outer wall of the clamping nut 3244 is provided with an external hexagonal operating part; the deep groove ball bearing 3242 and the retaining ring 3243 are installed in the stepped hole inside the clamping nut 3244.

[0042] Specifically, the control device further includes a magnet 80 and a magnet cap 81; the side wall of the housing 10 is provided with a magnet mounting cavity; the magnet 80 is encapsulated in the magnet mounting cavity by the magnet cap 81; the magnetic field direction of the magnet 80 is perpendicular to the angular flow channel.

[0043] Specifically, the coupling 50 is a rigid coupling with square holes at both ends; the top end of the valve stem 323 is a square shaft end that matches the square holes; and the output shaft of the electric actuator 40 is a square shaft end that matches the square holes.

[0044] Specifically, the control device further includes a bracket 90, the lower end of which is fixed to the flange 70, and the upper end of which is fixed to the electric actuator 40.

[0045] Specifically, the upper outer wall of the sleeve 31 is provided with a disassembly annular groove to facilitate disassembly of the sleeve 31; a two-stage sealing ring is provided between the bottom of the valve core assembly 32 and the inner wall of the sleeve 31. Example

[0046] This utility model provides a sleeve-type grinding wheel regulating valve control device, including a housing 10, a flow detection and control module 20, a sleeve-type grinding wheel regulating mechanism 30, an electric actuator 40, a coupling 50, and an explosion-proof hose 60.

[0047] 1. Shell structure

[0048] An angled flow channel is machined inside the housing 10, with its fluid inlet axis intersecting the outlet axis perpendicularly. A horizontal electrode mounting cylinder 102 is welded to the lower side of the housing 10, and a vertical valve core mounting cylinder 103 is welded to the upper right angle. The electrode mounting cylinder 102 is coaxial with the horizontal inlet channel, and the valve core mounting cylinder 103 is coaxial with the vertical outlet channel. Threaded holes are formed in the side wall of the housing 10 for mounting magnet assemblies (see details below).

[0049] 2. Flow detection and control module 20

[0050] The module includes:

[0051] Electrode assembly 21: Installed inside electrode mounting cylinder 102 and fixed to the inner wall of the cylinder by screws. Electrode assembly 21 includes two platinum electrode needles with a spacing of 5 mm, used to detect voltage pulse signals generated when conductive liquid flows through it.

[0052] Pressing flange 22: Connected to housing 10 by hex bolts, pressing electrode assembly 21 into the bottom sealing groove of electrode mounting cylinder 102.

[0053] Meter head branch pipe 23: It is a 90° bend pipe structure. The lower flange is connected to the clamping flange 22 by bolts, and the upper flange is connected to the smart meter head 24 by bolts.

[0054] Signal repeater 231: Fixed on the internal support of the meter head branch pipe 23, its input end is connected to the output terminal of the electrode assembly 21 through a shielded wire, and its output end is connected to the signal receiving terminal of the smart meter head 24 through a twisted pair cable. The signal repeater 231 uses an AD620 instrumentation amplifier to amplify the microvolt-level voltage pulse signal collected by the electrode assembly 21 by 100 times.

[0055] Smart meter 24: It adopts the Emerson ROC800 series flow computer, which has a built-in FFT spectrum analysis algorithm to process the amplified pulse signal, convert the signal frequency into flow rate value (L / min), and outputs control commands through a 4-20mA current loop.

[0056] Technical effect: The AD620 instrument amplifier amplifies weak pulse signals of 0.1-0.5mV to 10-50mV, solving the problem of signal distortion in low flow rates, and enabling the smart meter 24 to maintain a measurement accuracy of ±1% even at a flow rate of 0.5L / min.

[0057] 3. Sleeve-type grinding wheel adjustment mechanism 30

[0058] The organizations include:

[0059] Sleeve 31: Machined from 304 stainless steel, with an outer diameter of 50mm and a wall thickness of 5mm. Sleeve 31 is pressed into the valve core mounting cylinder 103 via flange 70. Two fluororubber sealing rings (2.5mm cross-sectional diameter) are installed between the outer wall of sleeve 31 and the inner wall of valve core mounting cylinder 103. An 8mm diameter guide hole is drilled on the side wall of sleeve 31, and a 10mm diameter through hole is drilled on the bottom. The guide hole connects the valve core assembly 32 to the outlet channel, and the through hole connects the guide hole to the inlet channel. A 2mm deep and 6mm wide annular disassembly groove is machined on the upper outer wall of sleeve 31.

[0060] Valve core assembly 32:

[0061] Lower alloy plate 322: Hard alloy disc (48mm in diameter) with 6 fan-shaped guide holes with a diameter of 6mm, which is fixed to the bottom of sleeve 31 by lower positioning pin 325.

[0062] Upper alloy plate 321: A carbide disc of the same specification with identical flow guide holes, fixed to the bottom of valve stem 323 by upper positioning pin 326. The lower end face of upper alloy plate 321 and the upper end face of lower alloy plate 322 are polished to Ra0.8μm and fitted together.

[0063] Valve stem 323: A 20mm diameter 440C stainless steel shaft, with an alloy sheet 321 connected to the lower end via a spline, and a 12×12mm square shaft end machined at the top.

[0064] Bearing assembly 324:

[0065] The thrust ball bearing 3241 is fitted onto the valve stem 323 and fits against the valve stem shoulder;

[0066] Deep groove ball bearing 3242 is fitted in the middle of valve stem 323;

[0067] The retaining ring 3243 is stuck in the groove of the valve stem 323.

[0068] The clamping nut 3244 has a stepped hole (22mm in diameter) with a depth of 15mm in the inner bore, which is threaded to the upper end of the sleeve 31 with an M48×1.5 thread. The outer wall of the nut is milled with an external hexagonal operating part with a width of 36mm across sides. When tightened with a torque wrench, the thrust ball bearing 3241 is pressed against the valve stem shoulder, while the stepped hole covers the deep groove ball bearing 3242 and the retaining ring 3243.

[0069] Technical benefits: The thrust ball bearing 3241 bears the axial load, while the deep groove ball bearing 3242 provides radial support. Combined with the retaining ring 3243 for limiting movement, this reduces the rotational friction coefficient of the valve stem 323 to 0.01, achieving an opening adjustment accuracy of 0.1°. The gap between the upper and lower alloy sheet mating surfaces is ≤0.01mm, ensuring no internal leakage under 35MPa high pressure.

[0070] 4. Driver and connection components

[0071] Electric Actuator 40: Uses AUMA SA series explosion-proof electric actuator with an output torque of 120Nm and a 12×12mm square shaft end machined on the output shaft.

[0072] Coupling 50: A rigid steel coupling of No. 45, with 12×12mm square holes at both ends, which are respectively fitted to the square shaft end of valve stem 323 and the square shaft end of actuator output shaft, and locked by set screws.

[0073] Explosion-proof flexible hose 60: Armored shielded flexible hose, with both ends connected to the command output port of the smart meter 24 and the control signal port of the electric actuator 40 respectively using M20×1.5 threads.

[0074] Support 90: Channel steel structure, the lower end is fixed to flange 70 with hexagonal bolts, and the upper end is fixed to the housing of electric actuator 40 with U-shaped clamps.

[0075] 5. Auxiliary Components

[0076] Magnet assembly: The magnet 80 is a neodymium iron boron permanent magnet (residual magnet 1.2T) installed in the cylindrical magnet mounting cavity on the side wall of the housing 10. The magnet cap 81 is pressed tightly by M30 thread sealing. The magnetic field direction is perpendicular to the angled flow channel, providing a constant excitation magnetic field for the electrode assembly 21.

[0077] The embodiment provides a working process for a sleeve-type grinding wheel regulating valve control device, which includes:

[0078] 1. Conductive liquid (containing salt water) flows in from the horizontal inlet of the housing 10 and generates a voltage pulse signal when it flows through the electrode assembly 21.

[0079] 2. The AD620 amplifier of the signal repeater 231 amplifies the 0.1-0.5mV signal to 10-50mV.

[0080] 3. The smart meter 24 uses the FFT algorithm to convert the pulse frequency into a flow rate value, and outputs a 4-20mA control current after comparing it with the set value.

[0081] 4. The control current is transmitted to the electric actuator 40 through the explosion-proof hose 60, which drives the output shaft to rotate.

[0082] 5. The coupling 50 transmits torque to the valve stem 323, causing the upper alloy plate 321 to rotate 0.1°-90° relative to the lower alloy plate 322, changing the overlapping area of ​​the guide hole (adjustment range 0.5-500L / min).

[0083] 6. The combination of thrust ball bearing 3241 and deep groove ball bearing 3242 supports the valve stem 323 to ensure rotational accuracy.

[0084] Overall effect: Under a water injection pressure of 35MPa, it achieves a control accuracy of ±2% under a small flow rate of 0.5L / min, and the life of the shell 10 is increased to 100,000 hours (compared to about 20,000 hours for traditional structures).

[0085] Example test data (as shown in Table 1 below):

[0086] Table 1:

[0087] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sleeve-type grinding wheel regulating valve control device, characterized in that, The control device includes: The housing (10) has an angled flow channel inside. The housing (10) has a horizontal electrode mounting cylinder (102) on the lower side and a vertical valve core mounting cylinder (103) at the right angle on the upper side. A flow detection and control module (20) includes an electrode assembly (21), a clamping flange (22), a meter head branch pipe (23), and a smart meter head (24). The electrode assembly (21) is installed inside the electrode mounting cylinder (102). The clamping flange (22) is connected to the housing (10) and clamps and fixes the electrode assembly (21). One end of the meter head branch pipe (23) is connected to the clamping flange (22), and the other end is connected to the smart meter head (24). A signal repeater (231) is provided inside the meter head branch pipe (23). The input end of the signal repeater (231) is connected to the electrode assembly (21), and the output end of the signal repeater (231) is connected to the smart meter head (24). A sleeve-type grinding wheel adjustment mechanism (30) includes a sleeve (31) and a valve core assembly (32). The sleeve (31) is fixedly installed inside the valve core mounting cylinder (103). The valve core assembly (32) is installed inside the sleeve (31). The valve core assembly (32) includes an upper alloy plate (321), a lower alloy plate (322), a valve stem (323), and a bearing assembly (324). The end faces of the upper alloy plate (321) and the lower alloy plate (322) are fitted together. The valve stem (323) drives and connects to the upper alloy plate (321). The bearing assembly (324) supports the valve stem (323). Electric actuator (40); A coupling (50) is provided, one end of which is connected to the output shaft of the electric actuator (40), and the other end of which is connected to the valve stem (323). An explosion-proof hose (60) is provided, one end of which is connected to the smart meter (24), and the other end of which is connected to the electric actuator (40).

2. The control device according to claim 1, characterized in that: The control device also includes a flange (70); The sleeve (31) is pressed and fixed inside the valve core mounting cylinder (103) by the flange (70); A sealing ring is provided between the outer wall of the sleeve (31) and the inner wall of the valve core mounting cylinder (103).

3. The control device according to claim 1, characterized in that: The sleeve (31) has a flow guide hole on its side wall and a through hole at its bottom; The flow guide hole connects the valve core assembly (32) to the outlet of the angled flow channel; The through hole connects the guide hole and the inlet of the angled flow channel.

4. The control device according to claim 1, characterized in that, The valve core assembly (32) also includes: The lower positioning pin (325) is fixed to the bottom of the sleeve (31) and passes through the lower alloy sheet (322). The upper positioning pin (326) is fixed to the bottom of the valve stem (323) and passes through the upper alloy plate (321).

5. The control device according to claim 1, characterized in that, The bearing assembly (324) includes: A thrust ball bearing (3241) is sleeved on the valve stem (323) and fits against the valve stem shoulder; A deep groove ball bearing (3242) is sleeved on the valve stem (323); A retaining ring (3243) is fitted onto the valve stem (323) and located at the upper end of the deep groove ball bearing (3242); The compression nut (3244) is threadedly connected to the sleeve (31) to press the thrust ball bearing (3241) against the valve stem shoulder.

6. The control device according to claim 5, characterized in that, The outer wall of the clamping nut (3244) is provided with an external hexagonal operating part; the deep groove ball bearing (3242) and the retaining ring (3243) are installed in the stepped hole inside the clamping nut (3244).

7. The control device according to claim 1, characterized in that, The control device further includes a magnet (80) and a magnet cap (81); the side wall of the housing (10) is provided with a magnet mounting cavity; the magnet (80) is encapsulated in the magnet mounting cavity by the magnet cap (81); the magnetic field direction of the magnet (80) is perpendicular to the angular flow channel.

8. The control device according to claim 1, characterized in that: The coupling (50) is a rigid coupling with square holes at both ends; The top end of the valve stem (323) is a square shaft end that matches the square hole; The output shaft of the electric actuator (40) is a square shaft end that matches the square hole.

9. The control device according to claim 2, characterized in that, The control device also includes a bracket (90), the lower end of which is fixed to the flange (70), and the upper end of which is fixed to the electric actuator (40).

10. The control device according to claim 1, characterized in that: The upper outer wall of the sleeve (31) is provided with a disassembly annular groove for disassembling the sleeve (31). The valve core assembly (32) has two sealing rings between its bottom and the inner wall of the sleeve (31).

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