Intelligent electric regulating valve and control method thereof

Abstract

The present invention discloses an intelligent electric regulating valve and a control method thereof, which relate to the technical field of regulating valves, and include a valve body and an actuator, the valve body includes a shell, a connected inlet channel and an outlet channel are arranged in the shell, a sealing cavity is formed between the inlet channel and the outlet channel, a valve seat is arranged in the sealing cavity, a sealing hole is arranged in the valve seat and an arc-shaped sealing surface is formed, a valve core is arranged between the valve body and the actuator, the valve core includes a valve stem and a valve head, the valve stem is sealingly and slidingly connected with the shell, the valve head is located in the shell and matches the valve seat, and also includes a valve sleeve, which is arranged on the valve head and matches the valve seat; the present invention uses a detachable valve sleeve, when the regulating valve has been used for a period of time, the sealing surface of the valve sleeve is washed by the fluid medium and causes greater wear, and the worker can solve the problem of valve core sealing by replacing the valve sleeve, and compared with a valve core of an integrated structure, this method has the advantages of simplicity, high efficiency and cost saving.

Description

Technical Field

[0001] The present invention relates to the technical field of regulating valves, and in particular to an intelligent electric regulating valve and a control method thereof. Background Technology

[0002] The electric control valve is a device that controls the valve opening through an electric actuator. It can automatically adjust the valve opening degree according to the signal sent by the control system to achieve the purpose of accurately controlling parameters such as fluid flow and pressure.

[0003] During use, the valve core of the regulating valve is susceptible to erosion and wear because it directly contacts and controls the flow of fluid. When wear occurs, the valve will not close tightly, causing internal or external leakage to intensify. At the same time, the abnormal flow pattern caused by wear will cause additional mechanical noise and vibration, which will damage the pipeline and other components in the long run.

[0004] The Chinese patent application number 202110589291.2 discloses a valve core anti-scouring regulating valve. The invention protects the sealing surface from medium scouring and improves the service life of the valve by the mutual cooperation between the spline teeth on the valve stem and the straight rack on the valve core. However, there are at least the following problems:

[0005] 1. The existing regulating valve core is composed of a valve stem and a valve head, and the valve stem and the valve head are welded or integrally formed. When the valve core is washed by the fluid and the sealing of its surface is seriously affected, the entire valve core needs to be replaced, which has a high maintenance cost and does not conform to the concept of reducing costs and increasing efficiency.

[0006] 2. If there are hard particles such as rust or sand in the fluid medium, some hard particles will be mixed between the valve core and the valve seat during the sealing process. These hard particles act as abrasives. During the closing process, as the pressure acts, these particles will scratch or etch the surface of the valve core; at the same time, when there is no fluid medium in the valve, the relative movement between the valve core and the valve seat will produce greater dry friction and dry wear. If there are hard particles, this wear problem will be further aggravated.

[0007] To this end, the present invention proposes an intelligent electric regulating valve and a control method thereof to solve the above problems. SUMMARY OF THE INVENTION

[0008] The purpose of the present invention is to provide an intelligent electric regulating valve and a control method thereof, so as to solve the technical problems in the above background technology, such as high valve core maintenance cost and uneven wear of the valve core sealing surface after being flushed by fluid.

[0009] To achieve the above object, the present invention provides the following technical solution: An intelligent electric control valve, comprising a valve body and an actuator. The valve body includes a housing, and a flow inlet channel and a flow outlet channel that are communicated with each other are arranged inside the housing. A sealing cavity is formed between the flow inlet channel and the flow outlet channel. A valve seat is arranged inside the sealing cavity. A sealing hole is arranged inside the valve seat and an arc-shaped sealing surface is formed. A valve core is arranged between the valve body and the actuator. The valve core includes a valve stem and a valve head. The valve stem is in sealed sliding connection with the housing, and the valve head is located inside the housing and matches the valve seat. It further includes: A valve sleeve, which is arranged on the valve head and matches the valve seat. The valve sleeve includes a fixed sleeve fixedly connected to the valve head and a sealing sleeve arranged on the outer surface of the fixed sleeve. The sealing sleeve includes a horizontal plane and an arc surface that matches the sealing surface of the valve seat. A connection hole is opened on the valve head, and a connection head that matches the connection hole is arranged on the fixed sleeve; A sealing seat, which is coaxially fixed inside the sealing hole of the valve seat. A sealing ring is arranged on the sealing seat; The horizontal plane of the sealing sleeve contacts the sealing ring to form a seal, and an activity gap is formed between the arc surface of the sealing sleeve and the sealing surface of the valve seat.

[0010] Preferably, it further includes a sealing mechanism, which is arranged inside the valve sleeve. The sealing mechanism includes a through hole opened on the sealing sleeve. An activity member is slidably connected inside the through hole. An annular cavity is formed between the fixed sleeve and the sealing sleeve. An annular groove is opened on the arc surface of the sealing sleeve. An elastic sealing member is fixedly connected inside the annular groove. A plurality of connection holes communicating with the annular cavity are opened in the annular groove. The activity member slides inside the through hole under the drive of fluid pressure, so that the fluid enters the annular cavity. The elastic sealing member deforms under the extrusion of the fluid pressure and forms a seal with the sealing surface of the valve seat.

[0011] Preferably, the activity member includes a pressing plate. An activity cavity is arranged inside the connection head. A connecting rod coaxially arranged with the activity cavity is fixedly connected to the pressing plate. A connecting plate is coaxially fixed at one end of the connecting rod located inside the activity cavity.

[0012] Preferably, a plurality of positioning plates located inside the annular cavity are fixedly connected to the sealing sleeve. A filter screen is arranged between two adjacent positioning plates.

[0013] Preferably, the sealing sleeve is rotatably connected to the fixed sleeve. An elastic member is arranged inside the activity cavity. A rotating mechanism is arranged inside the activity cavity. The connecting plate forms a rotating fit with the rotating mechanism. When the connecting plate is reset under the action of the elastic member, the activity member drives the sealing sleeve to rotate.

[0014] Preferably, the rotating mechanism includes a guiding groove formed on the inner wall of the movable cavity. The guiding groove includes a plurality of vertical grooves and inclined grooves connected end to end. A plurality of guiding columns are fixedly connected to the inner wall of the movable cavity, and the guiding columns are located at the joints of the vertical grooves and the inclined grooves. A guiding plate is rotatably connected to the guiding columns, and a torsion spring is arranged between the guiding plate and the guiding columns. A limiting block is fixedly connected to the inner wall of the movable cavity on one side of the guiding plate; a connecting pin is fixedly connected to the circumferential side of the connecting plate, and the connecting pin slides in the guiding groove. A clamping groove is formed in each of the plurality of positioning plates, and a clamping block matching the clamping groove is fixedly connected to the circumferential side of the pressing plate.

[0015] Preferably, an annular plate is fixedly connected to the sealing sleeve, a positioning groove matching the annular plate is formed on the fixed sleeve, and the annular plate is rotatably connected to the positioning groove.

[0016] Preferably, an adjusting plate is arranged in the movable cavity, the elastic member is located between the adjusting plate and the connecting plate. An adjusting column is fixedly connected to the adjusting plate, a knob is fixedly connected to the end of the adjusting column extending out of the connecting head, the adjusting column is in threaded connection with the connecting head, and a placing groove matching the knob is formed in the valve head.

[0017] Preferably, the actuator includes a connecting shaft coaxially arranged with the valve core. The end of the valve stem away from the valve head is in threaded connection with the connecting shaft. An indicator is arranged on the connecting shaft. A support frame is fixedly connected between the actuator and the valve body. A limiting plate and a scale plate are arranged on both sides of the support frame, and a pointer cooperating with the scale plate is arranged on the indicator.

[0018] The present invention also discloses a control method for an intelligent electric control valve, including the following steps:

[0019] Step 1: Before using the control valve, install the valve sleeve on the valve head. The specific steps are as follows:

[0020] S101: According to the pipeline pressure and usage requirements, rotate the knob to adjust the initial distance between the adjusting plate and the connecting plate. The greater the operating pressure of the pipeline, the closer the initial distance between the adjusting plate and the connecting plate;

[0021] S102: Align the connecting head on the valve sleeve with the connecting hole on the valve head, and install the valve sleeve on the valve head;

[0022] Step 2: Debug the control valve. The specific steps are as follows:

[0023] S201: Drive the valve core to approach the valve seat through the actuator, so that the horizontal plane of the valve sleeve contacts the sealing ring on the sealing seat and forms a seal;

[0024] S202: By means of the pointer of the actuator and the reading of the scale board, check whether the pointer is at the corresponding position when the valve is in the fully open and closed states by reading the values.

[0025] Step 3: Normally use the regulating valve to control the actuator to drive the valve core to move.

[0026] Step 4: If the sealing ring on the sealing seat shows unilateral aging or wear, adjust the relative position of the valve stem and the connecting shaft to regulate the contact pressure between the valve sleeve and the sealing ring.

[0027] The beneficial effects of the present invention are as follows:

[0028] 1. With the detachably arranged valve sleeve of the present invention, after the regulating valve has been used for a period of time, the sealing surface of the valve sleeve is severely worn by the erosion of the fluid medium. Workers can solve the problem of the sealing performance of the valve core by replacing the valve sleeve. Compared with the valve core of an integral structure, this method has the advantages of simplicity, high efficiency and cost savings.

[0029] 2. Through the settings of the sealing seat, sealing ring, elastic sealing member and movable gap, etc., when the valve core and the valve seat form a seal, the horizontal plane of the valve sleeve contacts the sealing ring on the sealing seat to form a primary seal. This method can avoid the wear of the sealing surface of the valve sleeve caused by hard particles. At the same time, as the fluid pressure in the inlet flow channel increases, the movable part moves upward to connect the annular cavity with the inlet flow channel. The elastic sealing member deforms under the action of the fluid pressure and forms a secondary seal with the valve seat. When there is no fluid medium in the valve, the elastic sealing member will not deform, and the sealing surface of the valve sleeve will not contact the sealing surface of the valve seat, avoiding the problem of dry wear and improving the service life of the valve sleeve and the valve seat.

[0030] 3. Through the settings of the guiding groove, connecting pin, guiding plate, clamping groove and clamping block, etc., when the valve is in the closed state, the movable part moves upward under the action of the fluid pressure until it reaches the intersection of the vertical groove and the inclined groove. When the valve is opened, the fluid pressures in the inlet flow channel, outlet flow channel and sealing cavity gradually tend to be the same. The movable part resets under the action of the elastic member, and the connecting pin enters the inclined groove, causing the movable part to drive the sealing sleeve to rotate by a certain angle, realizing that each opening of the valve can adjust the valve sleeve, avoiding the problem that the sealing surface on the side close to the outlet flow channel is worn more severely, making the wear of the sealing surface of the valve sleeve more uniform, improving the service life of the valve sleeve and extending the replacement cycle of the valve sleeve. Description of the Drawings

[0031] Figure 1 It is a schematic diagram of the overall structure of an intelligent electric regulating valve of the present invention.

[0032] Figure 2 It is a schematic diagram of the matching structure of the valve body and the valve core of the present invention.

[0033] Figure 3 This is a schematic plan sectional view of the valve body and the valve core of the present invention.

[0034] Figure 4 This is a schematic structural view of the valve core of the present invention.

[0035] Figure 5 For the present invention Figure 3 A schematic enlarged view of the structure at A in the present invention.

[0036] Figure 6 This is a schematic plan sectional view of the valve sleeve of the present invention.

[0037] Figure 7 This is a schematic structural view of the seal sleeve of the present invention.

[0038] Figure 8 This is a schematic structural view of the movable part of the present invention.

[0039] Figure 9 This is a disassembled schematic view of the valve sleeve of the present invention.

[0040] Figure 10 This is a schematic structural view of the rotating mechanism of the present invention.

[0041] Figure 11 For the present invention Figure 10 A schematic enlarged view of the structure at B in the present invention.

[0042] The reference numerals are:

[0043] 1. Valve body; 11. Housing; 111. Inlet flow channel; 112. Outlet flow channel; 113. Sealing cavity;

[0044] 2. Actuator; 21. Connecting shaft; 22. Indicator; 23. Support frame; 24. Limit plate; 25. Scale plate; 26. Pointer;

[0045] 3. Valve seat; 31. Sealing hole;

[0046] 4. Valve core; 41. Valve stem; 42. Valve head;

[0047] 5. Valve sleeve; 51. Fixed sleeve; 511. Connecting head; 512. Movable cavity; 513. Elastic member; 514. Positioning groove; 52. Seal sleeve; 521. Annular groove; 522. Positioning plate; 523. Filter screen; 524. Annular plate; 53. Sealing seat; 54. Sealing ring;

[0048] 6. Movable gap;

[0049] 7. Sealing mechanism; 71. Movable part; 711. Pressure plate; 712. Connecting rod; 713. Connecting plate; 72. Annular cavity; 73. Elastic seal; 74. Connecting hole;

[0050] 8. Rotating mechanism; 81. Guide groove; 811. Vertical groove; 812. Inclined groove; 82. Guide post; 83. Guide plate; 84. Limit block; 85. Connecting pin; 86. Card slot; 87. Card block;

[0051] 9. Adjusting plate; 91. Adjusting column; 92. Knob. Detailed implementation manner

[0052] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

[0053] Embodiment 1

[0054] The existing regulating valve spool is composed of a valve stem and a valve head, and the valve stem and the valve head are welded or integrally formed. When the spool is eroded by the fluid and seriously affects the sealing performance of its surface, the entire spool needs to be replaced, resulting in a relatively high maintenance cost, which does not conform to the concept of cost reduction and efficiency improvement. In order to solve the above problems, this embodiment is specifically invented.

[0055] Please refer to Figures 1 to 11 As shown, an intelligent electric regulating valve according to an embodiment of the present invention includes a valve body 1 and an actuator 2. The valve body 1 includes a housing 11. An inlet flow channel 111 and an outlet flow channel 112 that are connected and communicated are provided inside the housing 11. A sealing cavity 113 is formed between the inlet flow channel 111 and the outlet flow channel 112. A valve seat 3 is provided in the sealing cavity 113. A sealing hole 31 is provided in the valve seat 3 and an arc-shaped sealing surface is formed. A spool 4 is provided between the valve body 1 and the actuator 2. The spool 4 includes a valve stem 41 and a valve head 42. The valve stem 41 is in sealed sliding connection with the housing 11, and the valve head 42 is located inside the housing 11 and matches the valve seat 3. A valve sleeve 5 is further included.

[0056] Please refer to Figure 3 and Figure 4 As shown, the valve sleeve 5 is provided on the valve head 42 and matches the valve seat 3. The valve sleeve 5 includes a fixed sleeve 51 fixedly connected to the valve head 42 and a sealing sleeve 52 provided on the outer surface of the fixed sleeve 51. The sealing sleeve 52 includes a horizontal plane and an arc surface that matches the sealing surface of the valve seat 3. A connection hole 74 is provided on the valve head 42. A connection head 511 that matches the connection hole 74 is provided on the fixed sleeve 51. The connection head 511 and the connection hole 74 are connected by threads.

[0057] Please refer to Figure 1As shown in the figure, the actuator 2 includes a connecting shaft 21 coaxially arranged with the valve core 4. One end of the valve stem 41 away from the valve head 42 is threadedly connected to the connecting shaft 21. An indicator 22 is arranged on the connecting shaft 21. A support frame 23 is fixedly connected between the actuator 2 and the valve body 1. Limiting plates 24 and scale plates 25 are arranged on both sides of the support frame 23. A pointer 26 cooperating with the scale plate 25 is arranged on the indicator 22.

[0058] During use, the valve sleeve 5 is fixed to the valve head 42 by threaded connection, so that the fluid medium acts on the replaceable valve sleeve 5. A motor, an actuator mechanism and a control unit are arranged inside the actuator 2. Workers can make the valve core 4 slide in the sealing cavity 113 by controlling the rotation of the motor. When the valve sleeve 5 is severely worn due to fluid erosion, resulting in valve sealing failure, the worker can first remove the valve core 4 from the valve, then remove the old valve sleeve 5 and install a new valve sleeve 5.

[0059] With the detachably arranged valve sleeve 5, after the regulating valve is used for a period of time, the sealing surface of the valve sleeve 5 is severely worn due to the erosion of the fluid medium. Workers can solve the problem of the sealing performance of the valve core 4 by replacing the valve sleeve 5. Compared with the integrally structured valve core 4, this method has the advantages of simplicity, high efficiency and cost savings.

[0060] Embodiment 2

[0061] It is found in actual use that if there are hard particles such as rust or sediment in the fluid medium, during the sealing process between the valve core 4 and the valve seat 3, some hard particles will be trapped between the valve core 4 and the valve seat 3. These hard particles act as abrasives. During the closing process, with the action of pressure, these particles will scratch or damage the surface of the valve core 4. Further improvements are made on the basis of the above embodiment.

[0062] Please refer to Figure 5 and Figure 6 As shown in the figure, it further includes a sealing seat 53 and a sealing mechanism 7;

[0063] The sealing seat 53 is coaxially fixed in the sealing hole 31 of the valve seat 3, and a sealing ring 54 is arranged on the sealing seat 53;

[0064] The horizontal plane of the sealing sleeve 52 contacts the sealing ring 54 to form a seal, and an active gap 6 is formed between the arc surface of the sealing sleeve 52 and the sealing surface of the valve seat 3.

[0065] The sealing mechanism 7 is arranged inside the valve sleeve 5. The sealing mechanism 7 includes a through hole formed in the sealing sleeve 52. A movable member 71 is slidably connected inside the through hole. An annular cavity 72 is formed between the fixed sleeve 51 and the sealing sleeve 52. An annular groove 521 is formed on the arc surface of the sealing sleeve 52. An elastic sealing member 73 is fixedly connected inside the annular groove 521. A plurality of connecting holes 74 communicating with the annular cavity 72 are formed in the annular groove 521. The movable member 71 slides inside the through hole driven by the fluid pressure, enabling the fluid to enter the annular cavity 72. The elastic sealing member 73 deforms under the extrusion of the fluid pressure and forms a seal with the sealing surface of the valve seat 3.

[0066] Please refer to Figure 5 and Figure 8 As shown, the movable member 71 includes a pressing plate 711. A connecting hole 74 is formed on the valve head 42. A connecting head 511 matching the connecting hole 74 is arranged on the fixed sleeve 51. An activity cavity 512 is arranged inside the connecting head 511. A connecting rod 712 coaxially arranged with the activity cavity 512 is fixedly connected to the pressing plate 711. A connecting plate 713 is coaxially fixed at one end of the connecting rod 712 located inside the activity cavity 512.

[0067] Please refer to Figure 7 As shown, a plurality of positioning plates 522 located inside the annular cavity 72 are fixedly connected to the sealing sleeve 52. A filter screen 523 is arranged between two adjacent positioning plates 522.

[0068] During use, when the valve is in the closed state, the horizontal plane of the valve sleeve 5 contacts the sealing ring 54 arranged on the sealing seat 53 and forms a good sealing effect. The fluid medium inside the inflow channel 111 acts on the movable member 71 under the guidance of the valve seat 3 and the sealing seat 53, causing the movable member 71 to move upward and enabling the annular cavity 72 to communicate with the inflow channel 111. The fluid medium enters the annular cavity 72 and gradually keeps the same pressure as that inside the inflow channel 111. At this time, the elastic sealing member 73 deforms under the pressure, causing the elastic sealing member 73 to contact the sealing surface of the valve seat 3 and form a secondary seal.

[0069] It should be noted that when the valve is in the open state, the side of the sealing seat 53 close to the outflow channel 112 will also be subjected to a relatively large degree of fluid erosion, resulting in relatively heavy unilateral wear of the sealing ring 54. If the sealing ring 54 is severely worn or aged, the distance between the valve core 4 and the sealing seat 53 can be controlled, and the contact pressure between the valve sleeve 5 and the sealing ring 54 can be increased.

[0070] In summary, through the settings of the sealing seat 53, the sealing ring 54, the elastic sealing member 73, and the movable gap 6, when the valve core 4 and the valve seat 3 form a seal, the horizontal plane of the valve sleeve 5 contacts the sealing ring 54 on the sealing seat 53 to form a primary seal. This method can avoid the wear of the sealing surface of the valve sleeve 5 caused by hard particles. At the same time, as the fluid pressure in the inlet flow channel 111 increases, the movable member 71 moves upward to connect the annular cavity 72 with the inlet flow channel 111. The elastic sealing member 73 deforms under the action of the fluid pressure and forms a secondary seal with the valve seat 3. When there is no fluid medium in the valve, the elastic sealing member 73 does not deform, and the sealing surface of the valve sleeve 5 does not contact the sealing surface of the valve seat 3, avoiding the problem of wear and improving the service life of the valve sleeve 5 and the valve seat 3.

[0071] Embodiment III

[0072] When the valve is in the open state, the fluid will scour the sealing surface of the valve core 4 when passing through the valve core 4. Especially near the water outlet, due to the faster fluid velocity and larger flow rate, the sealing surface at this position is more severely damaged, resulting in uneven wear on the surface of the valve core 4; the more severely worn side will lose its sealing performance earlier, leading to a reduction in the service life of the valve core 4. Further improvements are made on the basis of the above embodiments.

[0073] Please refer to Figure 6 As shown, the sealing sleeve 52 is rotatably connected to the fixed sleeve 51. An elastic member 513 is arranged in the movable cavity 512, and a rotating mechanism 8 is arranged in the movable cavity 512. The connecting plate 713 forms a rotating fit with the rotating mechanism 8. When the connecting plate 713 returns under the action of the elastic member 513, the movable member 71 drives the sealing sleeve 52 to rotate.

[0074] Please refer to Figure 10 and Figure 11 As shown, the rotating mechanism 8 includes a guiding groove 81 formed on the inner wall of the movable cavity 512. The guiding groove 81 includes a plurality of vertically arranged grooves 811 and inclined grooves 812 connected end to end. A plurality of guiding columns 82 are fixedly connected to the inner wall of the movable cavity 512, and the guiding columns 82 are located at the connection of the vertically arranged grooves 811 and the inclined grooves 812. A guiding plate 83 is rotatably connected to the guiding column 82. A torsion spring is arranged between the guiding plate 83 and the guiding column 82. A limiting block 84 is fixedly connected to the inner wall of the movable cavity 512 on one side of the guiding plate 83.

[0075] Please refer to Figure 8 As shown, a connecting pin 85 is fixedly connected to the circumferential side of the connecting plate 713. The connecting pin 85 slides in the guiding groove 81. A clamping groove 86 is formed in each of the plurality of positioning plates 522, and a clamping block 87 matching the clamping groove 86 is fixedly connected to the circumferential side of the pressing plate 711.

[0076] Please refer to Figure 6As shown, an annular plate 524 is fixedly connected to the sealing sleeve 52. A positioning groove 514 matching the annular plate 524 is formed on the fixed sleeve 51, and the annular plate 524 is rotatably connected to the positioning groove 514.

[0077] An adjusting plate 9 is arranged in the movable cavity 512. The elastic member 513 is located between the adjusting plate 9 and the connecting plate 713. An adjusting column 91 is fixedly connected to the adjusting plate 9. One end of the adjusting column 91 extending out of the connecting head 511 is fixedly connected to a knob 92. The adjusting column 91 is threadedly connected to the connecting head 511. A placement groove matching the knob 92 is formed in the valve head 42.

[0078] During use, workers can rotate the knob 92 according to different pipeline pressures and usage requirements to adjust the initial distance between the adjusting plate 9 and the connecting plate 713, restricting the initial compression amount of the elastic member 513. The greater the operating pressure of the pipeline, the closer the initial distance between the adjusting plate 9 and the connecting plate 713, and the greater the initial compression amount of the elastic member 513.

[0079] After installing the valve sleeve 5 on the valve head 42, when the pressure in the inlet flow channel 111 gradually increases, the movable member 71 moves upward under the drive of the fluid. At this time, the connecting pin 85 moves in the vertical groove 811. During the upward movement of the connecting pin 85, the guiding plate 83 swings to one side under the action of the connecting pin 85. Until the connecting pin 85 is separated from the guiding plate 83, the guiding plate 83 is reset under the action of the torsion spring. And under the restriction of the limiting block 84, the initial position of the guiding plate 83 always remains unchanged and can form an angular cooperation with the inclined groove 812.

[0080] When the valve is in the open state, the fluid pressures in the inlet flow channel 111, the sealing cavity 113, and the outlet flow channel 112 gradually tend to be the same. The movable member 71 is reset under the action of the elastic member 513. At this time, during the downward movement of the connecting pin 85, under the guidance of the guiding plate 83, the connecting pin 85 enters the inclined groove 812 and moves until it reaches the intersection of the inclined groove 812 and the next vertical groove 811. During this process, the movable member 71 drives the sealing sleeve 52 to rotate.

[0081] In summary, through the settings such as the guiding groove 81, connecting pin 85, guiding plate 83, clamping groove 86 and clamping block 87, when the valve is in the closed state, the movable member 71 moves upward under the action of the fluid pressure until it moves to the intersection of the vertical groove 811 and the inclined groove 812. After the valve is opened, the fluid pressures in the inflow channel 111, the outflow channel 112 and the sealing cavity 113 gradually tend to be consistent. The movable member 71 resets under the action of the elastic member 513, and the connecting pin 85 enters the inclined groove 812 and causes the movable member 71 to drive the sealing sleeve 52 to rotate by a certain angle, so that each opening of the valve can adjust the valve sleeve 5, avoiding the problem that the sealing surface on the side close to the outflow channel 112 wears more seriously, making the wear of the sealing surface of the valve sleeve 5 more uniform, improving the service life of the valve sleeve 5, and extending the replacement cycle of the valve sleeve 5.

[0082] Embodiment 4

[0083] A control method for an intelligent electric control valve includes the following steps:

[0084] Step 1: Before using the control valve, install the valve sleeve 5 on the valve head 42. The specific steps are as follows:

[0085] S101: According to the pipeline pressure and usage requirements, rotate the knob 92 to adjust the initial distance between the adjusting plate 9 and the connecting plate 713. The greater the operating pressure of the pipeline, the closer the initial distance between the adjusting plate 9 and the connecting plate 713;

[0086] S102: Align the connecting head 511 on the valve sleeve 5 with the connecting hole 74 on the valve head 42, and install the valve sleeve 5 on the valve head 42;

[0087] Step 2: Debug the control valve. The specific steps are as follows:

[0088] S201: Drive the valve core 4 to approach the valve seat 3 through the actuator 2, so that the horizontal plane of the valve sleeve 5 contacts the sealing ring 54 on the sealing seat 53 and forms a seal. It should be noted that the pressure exerted by the valve sleeve 5 on the sealing seat 53 should not be too large or too small;

[0089] S202: Through the readings of the pointer 26 of the actuator 2 and the scale plate 25, check whether the pointer 26 is at the corresponding position when the valve is in the fully open and closed states;

[0090] Step 3: Normally use the control valve to control the actuator 2 to drive the valve core 4 to move;

[0091] Step 4: If the sealing ring 54 on the sealing seat 53 shows unilateral aging or wear, adjust the relative position of the valve stem 41 and the connecting shaft 21 to adjust the contact pressure between the valve sleeve 5 and the sealing ring 54.

[0092] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. An intelligent electric regulating valve, comprising a valve body and an actuator, characterized in that: The valve body comprises a shell, a flow inlet and a flow outlet are arranged in the shell, a sealing cavity is formed between the flow inlet and the flow outlet, a valve seat is arranged in the sealing cavity, a sealing hole is arranged in the valve seat and an arc-shaped sealing surface is formed, a valve core is arranged between the valve body and the actuator, the valve core comprises a valve stem and a valve head, the valve stem is sealingly and slidably connected to the shell, and the valve head is located in the shell and matches the valve seat; It also includes a valve sleeve, which is arranged on the valve head and matches the valve seat, the valve sleeve includes a fixed sleeve fixedly connected to the valve head and a sealing sleeve arranged on the outer surface of the fixed sleeve, the sealing sleeve includes a horizontal surface and an arc surface matching the sealing surface of the valve seat, the valve head is provided with a connecting hole, and the fixed sleeve is provided with a connecting head matching the connecting hole; A sealing seat, which is coaxially fixed in the sealing hole of the valve seat, and a sealing ring is provided on the sealing seat; The horizontal surface of the sealing sleeve contacts the sealing ring to form a seal, and a movable gap is formed between the arc surface of the sealing sleeve and the sealing surface of the valve seat; A sealing mechanism is arranged in the valve sleeve, the sealing mechanism comprises a through hole opened on the sealing sleeve, and a movable part is slidably connected in the through hole; The movable part comprises a pressing plate, a movable cavity is arranged in the connecting head, a connecting rod coaxially arranged with the movable cavity is fixedly connected to the pressing plate, and a connecting plate is coaxially fixed to one end of the connecting rod located in the movable cavity; The sealing sleeve is rotatably connected to the fixed sleeve, an elastic member is arranged in the movable cavity, a rotating mechanism is arranged in the movable cavity, the connecting plate and the rotating mechanism form a rotating match, and when the connecting plate is reset under the action of the elastic member, the movable member drives the sealing sleeve to rotate.

2. The intelligent electric regulating valve according to claim 1, characterized in that: Also includes: An annular cavity is formed between the fixed sleeve and the sealing sleeve, an annular groove is provided on the arc surface of the sealing sleeve, an elastic sealing member is fixedly connected in the annular groove, a plurality of connecting holes connected with the annular cavity are provided in the annular groove, the movable member slides in the through hole driven by the fluid pressure to allow the fluid to enter the annular cavity, the elastic sealing member is deformed under the extrusion of the fluid pressure and forms a seal with the sealing surface of the valve seat.

3. The intelligent electric regulating valve according to claim 2, characterized in that: A plurality of positioning plates located in the annular cavity are fixedly connected to the sealing sleeve, and a filter screen is arranged between two adjacent positioning plates.

4. The intelligent electric regulating valve according to claim 3, characterized in that: The rotating mechanism comprises a guide groove formed on the inner wall of the movable cavity, wherein the guide groove comprises a plurality of vertical grooves and oblique grooves connected end to end, a plurality of guide posts are fixedly connected to the inner wall of the movable cavity, and the guide posts are located at the connection between the vertical grooves and the oblique grooves, a guide plate is rotatably connected to the guide post, a torsion spring is arranged between the guide plate and the guide post, and a limit block located on one side of the guide plate is fixedly connected to the inner wall of the movable cavity; A connecting pin is fixedly connected to the circumferential side of the connecting plate, and the connecting pin slides in the guide groove. A plurality of the positioning plates are provided with a card slot, and a card block matching the card slot is fixedly connected to the circumferential side of the pressure plate.

5. The intelligent electric regulating valve according to claim 4, characterized in that: The sealing sleeve is fixedly connected with an annular plate, the fixing sleeve is provided with a positioning groove matching with the annular plate, and the annular plate is rotatably connected with the positioning groove.

6. The intelligent electric regulating valve according to claim 5, characterized in that: An adjustment plate is provided in the movable cavity, the elastic member is located between the adjustment plate and the connecting plate, an adjustment column is fixedly connected to the adjustment plate, one end of the adjustment column extending out of the connecting head is fixedly connected to a knob, the adjustment column is threadedly connected to the connecting head, and a placement groove matching the knob is opened in the valve head.

7. The intelligent electric regulating valve according to claim 6, characterized in that: The actuator includes a connecting shaft coaxially arranged with the valve core, one end of the valve stem away from the valve head is threadedly connected to the connecting shaft, an indicator is arranged on the connecting shaft, a support frame is fixedly connected between the actuator and the valve body, limit plates and scale plates are arranged on both sides of the support frame, and a pointer cooperating with the scale plate is arranged on the indicator.

8. A control method for an intelligent electric regulating valve, the control method being used to control an intelligent electric regulating valve according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Before using the regulating valve, install the valve sleeve on the valve head. The specific steps are as follows: S101: According to the pipeline pressure and usage requirements, turn the knob to adjust the initial distance between the regulating plate and the connecting plate. The greater the operating pressure of the pipeline, the closer the initial distance between the regulating plate and the connecting plate. S102: Align the connector on the valve sleeve with the connecting hole on the valve head, and install the valve sleeve on the valve head; Step 2: Debug the regulating valve. The specific steps are as follows: S201: The actuator drives the valve core to approach the valve seat, so that the horizontal surface of the valve sleeve contacts the sealing ring on the sealing seat and forms a seal; S202: Check the pointer of the actuator and the reading of the scale plate to see whether the pointer is at the corresponding position when the valve is in the fully open and closed states; Step 3: Use the regulating valve normally and control the actuator to drive the valve core to move; Step 4: If the sealing ring on the sealing seat is aged or worn on one side, adjust the contact pressure between the valve sleeve and the sealing ring by adjusting the relative position of the valve stem and the connecting shaft.

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