Intelligent electric control valve and control method thereof

Abstract

The invention discloses an intelligent electric regulating valve and a control method thereof, and relates to the technical field of regulating valves, the intelligent electric regulating valve comprises a valve body and an actuator, the valve body comprises a shell, a flow inlet channel and a flow outlet channel which are communicated with each other are arranged in the shell, a sealing cavity is formed between the flow inlet channel and the flow outlet channel, and a valve seat is arranged in the sealing cavity; a sealing hole is formed in the valve seat, an arc-shaped sealing face is formed in the valve seat, a valve element is arranged between the valve body and the actuator, the valve element comprises a valve rod and a valve head, the valve rod is connected with the shell in a sealed and sliding mode, the valve head is located in the shell and matched with the valve seat, and the valve sleeve is arranged on the valve head and matched with the valve seat. By means of the detachably-arranged valve sleeve, after the adjusting valve is used for a period of time, the sealing face of the valve sleeve is scoured by fluid media and then is greatly abraded, workers can solve the problem of the sealing performance of the valve element in the mode that the valve sleeve is replaced, and compared with a valve element of an integrated structure, the mode has the advantages of being simple, efficient and capable of saving cost.

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 Art

[0002] An 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] The valve core of the regulating valve is easily eroded and worn during use because it directly contacts and controls the flow of fluid. When wear occurs, the valve will not close tightly, resulting in increased internal or external leakage. 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 spur rack on the valve core. However, there are at least the following problems: 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.

[0005] 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 of the valve core and the valve seat. 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.

[0006] 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

[0007] The object of the present invention is to provide an intelligent electric regulating valve and a control method thereof, so as to solve the technical problems mentioned 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.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solutions: an intelligent electric regulating valve, comprising a valve body and an actuator, the valve body comprising a housing, a connected inlet and outlet passages are arranged in the housing, a sealing cavity is formed between the inlet and outlet passages, 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 housing, and the valve head is located in the housing and matches the valve seat, and also comprises: A valve sleeve, which is arranged on the valve head and matches the valve seat, the valve sleeve includes a fixing sleeve fixedly connected to the valve head and a sealing sleeve arranged on the outer surface of the fixing sleeve, the sealing sleeve includes a horizontal surface and an arc surface matching the sealing surface of the valve seat, a connecting hole is opened on the valve head, and a connecting head matching the connecting hole is arranged on the fixing sleeve; a sealing seat, which is coaxially fixed in the sealing hole of the valve seat, and a sealing ring is arranged on the sealing seat; the horizontal surface of the sealing sleeve contacts with 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.

[0009] Preferably, a sealing mechanism is further included, which is arranged in the valve sleeve, the sealing mechanism comprising a through hole opened on the sealing sleeve, a movable part is slidably connected in 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 part is fixedly connected in the annular groove, a plurality of connecting holes connected to the annular cavity are opened in the annular groove, the movable part slides in the through hole driven by the fluid pressure, so that the fluid enters the annular cavity, the elastic sealing part is deformed under the extrusion of the fluid pressure and forms a seal with the sealing surface of the valve seat.

[0010] Preferably, the movable part includes a pressure plate, a movable cavity is arranged in the connecting head, a connecting rod coaxially arranged with the movable cavity is fixedly connected to the pressure plate, and a connecting plate is coaxially fixed to one end of the connecting rod located in the movable cavity.

[0011] Preferably, 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.

[0012] Preferably, the sealing sleeve is rotatably connected to the fixed sleeve, an elastic member is provided in the movable cavity, a rotating mechanism is provided in the movable cavity, the connecting plate and the rotating mechanism form a rotational fit, and when the connecting plate is reset under the action of the elastic member, the movable member drives the sealing sleeve to rotate.

[0013] Preferably, the rotating mechanism includes a guide groove opened on the inner wall of the movable cavity, the guide groove includes a plurality of vertical grooves and oblique grooves connected end to end, a plurality of guide columns are fixedly connected to the inner wall of the movable cavity, and the guide columns are located at the connection between the vertical grooves and the oblique grooves, a guide plate is rotatably connected to the guide column, a torsion spring is arranged between the guide plate and the guide column, 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, 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.

[0014] Preferably, an annular plate is fixedly connected to the sealing sleeve, a positioning groove matching the annular plate is formed on the fixing sleeve, and the annular plate is rotatably connected to the positioning groove.

[0015] Preferably, 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.

[0016] 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 threadedly connected to the connecting shaft, an indicator is provided on the connecting shaft, a support frame is fixedly connected between the actuator and the valve body, a limit plate and a scale plate are provided on both sides of the support frame, and the indicator is provided with a pointer that cooperates with the scale plate.

[0017] The present invention also discloses a control method for an intelligent electric regulating valve, comprising the following steps: 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.

[0018] The beneficial effects of the present invention are: 1. The present invention adopts a detachable valve sleeve. When the regulating valve is used for a period of time, the sealing surface of the valve sleeve is washed by the fluid medium and causes great wear. Workers can solve the problem of valve core sealing by replacing the valve sleeve. Compared with the valve core of an integrated structure, this method has the advantages of simplicity, high efficiency and cost saving.

[0019] 2. The present invention is provided with a sealing seat, a sealing ring, an elastic sealing member and a movable gap. When the valve core and the valve seat form a seal, the horizontal surface of the valve sleeve contacts the sealing ring on the sealing seat to form a primary seal. This method can prevent hard particles from causing wear on the sealing surface of the valve sleeve. At the same time, as the fluid pressure in the inlet channel increases, the movable member moves upward to connect the annular cavity with the inlet channel. The elastic sealing member is deformed 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 be deformed, and the sealing surface of the valve sleeve will not contact the sealing surface of the valve seat, thereby avoiding the problem of dry wear and increasing the service life of the valve sleeve and the valve seat.

[0020] 3. The present invention is provided with guide grooves, connecting pins, guide plates, card grooves and card blocks. When the valve is in a closed state, the movable part moves upward under the action of fluid pressure until it moves to the intersection of the vertical groove and the inclined groove. When the valve is opened, the fluid pressures in the inlet channel, the outlet channel and the sealing cavity gradually tend to be consistent, and the movable part is reset under the action of the elastic part. The connecting pin enters the inclined groove and causes the movable part to drive the sealing sleeve to rotate a certain angle, so that the valve sleeve can be adjusted each time the valve is opened, avoiding the problem of more serious wear of the sealing surface close to the outlet channel, making the sealing surface of the valve sleeve wear more evenly, thereby increasing the service life of the valve sleeve and extending the replacement cycle of the valve sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The figure is a schematic diagram of the overall structure of an intelligent electric regulating valve of the present invention.

[0022] Figure 2 It is a schematic diagram of the matching structure of the valve body and the valve core of the present invention.

[0023] Figure 3 It is a schematic diagram of the planar cross-sectional structure of the valve body and valve core of the present invention.

[0024] Figure 4 It is a structural schematic diagram of the valve core of the present invention.

[0025] Figure 5 For the present invention Figure 3 A schematic diagram of the enlarged structure at point A in the middle.

[0026] Figure 6 It is a schematic plan cross-sectional view of the valve sleeve of the present invention.

[0027] Figure 7 It is a schematic structural diagram of the sealing sleeve of the present invention.

[0028] Figure 8 It is a structural schematic diagram of the movable part of the present invention.

[0029] Fig. 9 It is a disassembly schematic diagram of the valve sleeve of the present invention.

[0030] Fig.10 It is a structural schematic diagram of the rotating mechanism of the present invention.

[0031] Fig.11 For the present invention Fig.10 A magnified schematic diagram of the structure at point B in the middle.

[0032] The accompanying drawings are marked as follows: 1. valve body; 11. housing; 111. inlet channel; 112. outlet channel; 113. sealing chamber; 2. Actuator; 21. Connecting shaft; 22. Indicator; 23. Support frame; 24. Limit plate; 25. Scale plate; 26. Pointer; 3. Valve seat; 31. Sealing hole; 4. Valve core; 41. Valve stem; 42. Valve head; 5. Valve sleeve; 51. Fixed sleeve; 511. Connector; 512. Active cavity; 513. Elastic member; 514. Positioning groove; 52. Sealing sleeve; 521. Annular groove; 522. Positioning plate; 523. Filter screen; 524. Annular plate; 53. Sealing seat; 54. Sealing ring; 6. Activity interval; 7. Sealing mechanism; 71. Moving part; 711. Pressing plate; 712. Connecting rod; 713. Connecting plate; 72. Annular cavity; 73. Elastic sealing member; 74. Connecting hole; 8. Rotating mechanism; 81. Guide groove; 811. Vertical groove; 812. Oblique groove; 82. Guide column; 83. Guide plate; 84. Limit block; 85. Connecting pin; 86. Card slot; 87. Card block; 9. Adjustment plate; 91. Adjustment column; 92. Knob. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0034] Embodiment 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 fluid and the sealing of its surface is seriously affected, the entire valve core needs to be replaced, which has high maintenance costs and does not conform to the concept of reducing costs and increasing efficiency. This embodiment is specially invented to solve the above problems.

[0035] See also Figures 1 to 11 As shown, an intelligent electric regulating valve according to an embodiment of the present invention comprises a valve body 1 and an actuator 2, the valve body 1 comprises a shell 11, a connected inlet channel 111 and an outlet channel 112 are arranged in the shell 11, a sealing cavity 113 is formed between the inlet channel 111 and the outlet channel 112, a valve seat 3 is arranged in the sealing cavity 113, a sealing hole 31 is arranged in the valve seat 3 and an arc-shaped sealing surface is formed, a valve core 4 is arranged between the valve body 1 and the actuator 2, the valve core 4 comprises a valve stem 41 and a valve head 42, the valve stem 41 is sealingly and slidably connected to the shell 11, and the valve head 42 is located in the shell 11 and matches the valve seat 3, and also comprises a valve sleeve 5.

[0036] See also Figure 3 and Figure 4 As shown, the valve sleeve 5 is arranged on the valve head 42 and matches the valve seat 3. The valve sleeve 5 includes a fixing sleeve 51 fixedly connected to the valve head 42 and a sealing sleeve 52 arranged on the outer surface of the fixing sleeve 51. The sealing sleeve 52 includes a horizontal surface and an arc surface matching the sealing surface of the valve seat 3. A connecting hole 74 is opened on the valve head 42, and a connecting head 511 matching the connecting hole 74 is arranged on the fixing sleeve 51. The connecting head 511 is connected to the connecting hole 74 by threads.

[0037] See also Figure 1 As shown, 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, a limit plate 24 and a scale plate 25 are arranged on both sides of the support frame 23, and a pointer 26 cooperating with the scale plate 25 is arranged on the indicator 22.

[0038] When in use, the valve sleeve 5 is fixed to the valve head 42 by means of a threaded connection, so that the fluid medium acts on the replaceable valve sleeve 5. The actuator 2 is provided with a motor, an actuator mechanism and a control unit. The worker controls the rotation of the motor to slide the valve core 4 in the sealing chamber 113. When the valve sleeve 5 is greatly worn by the fluid scouring, which leads to the failure of the valve seal, the worker can first remove the valve core 4 from the valve, remove the old valve sleeve 5 and then install a new valve sleeve 5.

[0039] With the detachable valve sleeve 5, after the regulating valve has been used for a period of time, the sealing surface of the valve sleeve 5 will be greatly worn after being flushed by the fluid medium. Workers can solve the problem of sealing of the valve core 4 by replacing the valve sleeve 5. Compared with the valve core 4 with an integrated structure, this method has the advantages of being simple, efficient and cost-saving.

[0040] Embodiment 2 In actual use, it is found that if there are hard particles such as rust or sand in the fluid medium, some hard particles will be mixed between the valve core 4 and the valve seat 3 during the sealing process of the valve core 4 and the valve seat 3. These hard particles act as abrasives. During the closing process, as the pressure acts, these particles will scratch or damage the surface of the valve core 4. Further improvements are made on the basis of the above embodiment.

[0041] See also Figure 5 and Figure 6 As shown, it also includes a sealing seat 53 and a sealing mechanism 7; The sealing seat 53 is coaxially fixed in the sealing hole 31 of the valve seat 3, and a sealing ring 54 is provided on the sealing seat 53; The horizontal surface of the sealing sleeve 52 contacts with the sealing ring 54 to form a seal, and a movable gap 6 is formed between the arc surface of the sealing sleeve 52 and the sealing surface of the valve seat 3 .

[0042] The sealing mechanism 7 is arranged in the valve sleeve 5, and the sealing mechanism 7 includes a through hole opened on the sealing sleeve 52, and a movable part 71 is slidably connected in the through hole, and an annular cavity 72 is formed between the fixed sleeve 51 and the sealing sleeve 52. An annular groove 521 is opened on the arc surface of the sealing sleeve 52, and an elastic sealing part 73 is fixedly connected in the annular groove 521. A plurality of connecting holes 74 connected with the annular cavity 72 are opened in the annular groove 521. The movable part 71 slides in the through hole driven by the fluid pressure, so that the fluid enters the annular cavity 72, and the elastic sealing part 73 is deformed under the extrusion of the fluid pressure and forms a seal with the sealing surface of the valve seat 3.

[0043] See also Figure 5 and Figure 8As shown, the movable part 71 includes a pressure plate 711, a connecting hole 74 is opened on the valve head 42, a connecting head 511 matching the connecting hole 74 is arranged on the fixed sleeve 51, an active chamber 512 is arranged in the connecting head 511, a connecting rod 712 coaxially arranged with the active chamber 512 is fixedly connected to the pressure plate 711, and a connecting plate 713 is coaxially fixed to one end of the connecting rod 712 located in the active chamber 512.

[0044] See also Figure 7 As shown, a plurality of positioning plates 522 located in the annular cavity 72 are fixedly connected to the sealing sleeve 52 , and a filter screen 523 is arranged between two adjacent positioning plates 522 .

[0045] When in use, when the valve is in a closed state, the horizontal surface of the valve sleeve 5 contacts the sealing ring 54 provided on the sealing seat 53 and forms a good sealing effect. The fluid medium in the inlet channel 111 acts on the movable part 71 under the guidance of the valve seat 3 and the sealing seat 53, so that the movable part 71 moves upward and connects the annular cavity 72 with the inlet channel 111. The fluid medium enters the annular cavity 72 and gradually maintains consistency with the pressure in the inlet channel 111. At this time, the elastic seal 73 is deformed under the action of pressure, so that the elastic seal 73 contacts the sealing surface of the valve seat 3 and forms a secondary seal.

[0046] It should be noted that when the valve is in the open state, the side of the sealing seat 53 close to the outlet channel 112 will also be subjected to a greater degree of fluid erosion, resulting in heavier wear on one side of the sealing ring 54. If the sealing ring 54 is severely worn or aged, the contact pressure between the valve sleeve 5 and the sealing ring 54 can be increased by controlling the distance between the valve core 4 and the sealing seat 53.

[0047] To summarize, 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 forms a seal with the valve seat 3, the horizontal surface of the valve sleeve 5 contacts the sealing ring 54 on the sealing seat 53 to form a primary seal. This method can prevent hard particles from causing wear on the sealing surface of the valve sleeve 5. At the same time, as the fluid pressure in the inlet channel 111 increases, the movable member 71 moves upward to connect the annular cavity 72 with the inlet channel 111. The elastic sealing member 73 is deformed 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 will not be deformed, and the sealing surface of the valve sleeve 5 will not contact the sealing surface of the valve seat 3, thereby avoiding the problem of wear and tear and improving the service life of the valve sleeve 5 and the valve seat 3.

[0048] Embodiment 3 When the valve is in the open state, the fluid will flush the sealing surface of the valve core 4 when passing through the valve core 4, especially near the water outlet. Since the fluid has a faster flow rate and a larger flow rate, the sealing surface there is more seriously damaged, resulting in uneven surface wear of the valve core 4; the side with more serious wear will lose its sealing performance earlier, resulting in a reduced service life of the valve core 4. Further improvements are made on the basis of the above embodiment.

[0049] See also Figure 6 As shown, the sealing sleeve 52 is rotatably connected to the fixed sleeve 51, an elastic member 513 is provided in the movable cavity 512, a rotating mechanism 8 is provided in the movable cavity 512, the connecting plate 713 forms a rotational fit with the rotating mechanism 8, and when the connecting plate 713 is reset under the action of the elastic member 513, the movable member 71 drives the sealing sleeve 52 to rotate.

[0050] See also Fig.10 and Fig.11 As shown, the rotating mechanism 8 includes a guide groove 81 opened on the inner wall of the active cavity 512, and the guide groove 81 includes a plurality of vertical grooves 811 and oblique grooves 812 connected end to end. A plurality of guide columns 82 are fixedly connected to the inner wall of the active cavity 512, and the guide columns 82 are located at the connection between the vertical grooves 811 and the oblique grooves 812. A guide plate 83 is rotatably connected to the guide column 82, and a torsion spring is arranged between the guide plate 83 and the guide column 82. A limit block 84 located on one side of the guide plate 83 is fixedly connected to the inner wall of the active cavity 512.

[0051] See also Figure 8 As shown, a connecting pin 85 is fixedly connected to the circumferential side of the connecting plate 713 , and the connecting pin 85 slides in the guide groove 81 . A plurality of positioning plates 522 are each provided with a card slot 86 , and a card block 87 matching the card slot 86 is fixedly connected to the circumferential side of the pressure plate 711 .

[0052] See also Figure 6 As shown, an annular plate 524 is fixedly connected to the sealing sleeve 52 , a positioning groove 514 matching with the annular plate 524 is formed on the fixing sleeve 51 , and the annular plate 524 is rotatably connected to the positioning groove 514 .

[0053] An adjusting plate 9 is provided in the movable cavity 512, and 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, and 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, and a placement groove matching the knob 92 is opened in the valve head 42.

[0054] During use, workers can turn the knob 92 to adjust the initial distance between the adjustment plate 9 and the connecting plate 713 according to different pipeline pressures and usage requirements, and constrain the initial compression of the elastic member 513. The greater the operating pressure of the pipeline, the closer the initial distance between the adjustment plate 9 and the connecting plate 713, and the greater the initial compression of the elastic member 513.

[0055] After the valve sleeve 5 is installed on the valve head 42, when the pressure in the inlet channel 111 gradually increases, the movable part 71 moves upward under the drive of the fluid, and the connecting pin 85 moves in the vertical groove 811 at this time. In the process of the connecting pin 85 moving upward, the guide plate 83 swings to one side under the action of the connecting pin 85 until the connecting pin 85 is out of contact with the guide plate 83. Then, the guide plate 83 is reset under the action of the torsion spring, and the guide plate 83 is restricted by the limit block 84, so that the initial position of the guide plate 83 remains unchanged and can form an angular match with the inclined groove 812.

[0056] When the valve is in an open state, the fluid pressures in the inlet channel 111, the sealing chamber 113 and the outlet channel 112 gradually tend to be consistent, and the movable member 71 is reset under the action of the elastic member 513. At this time, when the connecting pin 85 moves downward, under the guidance of the guide plate 83, the connecting pin 85 enters the inclined groove 812 and moves to the intersection of the inclined groove 812 and the next vertical groove 811. In this process, the movable member 71 drives the sealing sleeve 52 to rotate.

[0057] In summary, through the arrangement of the guide groove 81, the connecting pin 85, the guide plate 83, the clamping groove 86 and the clamping block 87, when the valve is in a closed state, the movable member 71 is moved upward by the action of the fluid pressure until it moves to the intersection of the vertical groove 811 and the inclined groove 812. When the valve is opened, the fluid pressures in the inlet channel 111, the outlet channel 112 and the sealing chamber 113 gradually tend to be consistent, and the movable member 71 is reset under the action of the elastic member 513. The connecting pin 85 enters the inclined groove 812 and enables the movable member 71 to drive the sealing sleeve 52 to rotate a certain angle, so that the valve sleeve 5 can be adjusted each time the valve is opened, avoiding the problem of more serious wear of the sealing surface close to the outlet channel 112, making the wear of the sealing surface of the valve sleeve 5 more uniform, thereby increasing the service life of the valve sleeve 5 and extending the replacement cycle of the valve sleeve 5.

[0058] Embodiment 4 A control method for an intelligent electric regulating valve comprises the following steps: Step 1: Before using the regulating valve, install the valve sleeve 5 on the valve head 42. The specific steps are as follows: S101: According to the pipeline pressure and usage requirements, the knob 92 is turned to adjust the initial distance between the adjustment plate 9 and the connection plate 713. The greater the operating pressure of the pipeline, the closer the initial distance between the adjustment plate 9 and the connection plate 713. S102: Align the connector 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; Step 2: Debug the regulating valve. The specific steps are as follows: S201: The actuator 2 drives the valve core 4 to approach the valve seat 3, so that the horizontal surface of the valve sleeve 5 contacts the sealing ring 54 on the sealing seat 53 and forms a seal. It is necessary to pay attention to the pressure applied by the valve sleeve 5 to the sealing seat 53, which should not be too large or too small. S202: Check whether the pointer 26 of the actuator 2 is located at the corresponding position when the valve is in the fully open and closed states by reading the pointer 26 of the actuator 2 and the reading of the scale plate 25; Step 3: Use the regulating valve normally and control the actuator 2 to drive the valve core 4 to move; Step 4: If the sealing ring 54 on the sealing seat 53 is aged or worn on one side, the contact pressure between the valve sleeve 5 and the sealing ring 54 is adjusted by adjusting the relative position of the valve stem 41 and the connecting shaft 21 .

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An intelligent electric regulating valve, comprising a valve body (1) and an actuator (2), characterized in that: The valve body (1) comprises a shell (11), wherein a flow inlet (111) and a flow outlet (112) which are connected to each other are arranged in the shell (11), a sealing cavity (113) is formed between the flow inlet (111) and the flow outlet (112), a valve seat (3) is arranged in the sealing cavity (113), a sealing hole (31) is arranged in the valve seat (3) and an arc-shaped sealing surface is formed, a valve core (4) is arranged between the valve body (1) and the actuator (2), the valve core (4) comprises a valve stem (41) and a valve head (42), the valve stem (41) is sealingly and slidably connected to the shell (11), and the valve head (42) is located in the shell (11) and matches the valve seat (3); The valve assembly further comprises a valve sleeve (5) which is arranged on the valve head (42) and matches the valve seat (3), the valve sleeve (5) comprising a fixing sleeve (51) fixedly connected to the valve head (42) and a sealing sleeve (52) arranged on the outer surface of the fixing sleeve (51), the sealing sleeve (52) comprising a horizontal surface and an arc surface matching the sealing surface of the valve seat (3), the valve head (42) being provided with a connecting hole (74), the fixing sleeve (51) being provided with a connecting head (511) matching the connecting hole (74); a sealing seat (53) which is coaxially fixed in the sealing hole (31) of the valve seat (3), the sealing seat (53) being provided with a sealing ring (54); the horizontal surface of the sealing sleeve (52) contacts the sealing ring (54) to form a seal, and a movable gap (6) is formed between the arc surface of the sealing sleeve (52) and the sealing surface of the valve seat (3).

2. The intelligent electric regulating valve according to claim 1, characterized in that: Also includes: A sealing mechanism (7) is arranged in the valve sleeve (5), the sealing mechanism (7) comprising a through hole formed on the sealing sleeve (52), a movable member (71) being slidably connected in the through hole, an annular cavity (72) being formed between the fixed sleeve (51) and the sealing sleeve (52), an annular groove (521) being formed on the arc surface of the sealing sleeve (52), an elastic sealing member (73) being fixedly connected in the annular groove (521), a plurality of connecting holes (74) being formed in the annular groove (521) and being connected to the annular cavity (72), the movable member (71) sliding in the through hole under the drive of fluid pressure, so that the fluid enters the annular cavity (72), the elastic sealing member (73) deforming under the pressure of the fluid and forming a seal with the sealing surface of the valve seat (3).

3. The intelligent electric regulating valve according to claim 2, characterized in that: The movable member (71) comprises a pressing plate (711), an movable cavity (512) is arranged in the connecting head (511), a connecting rod (712) coaxially arranged with the movable cavity (512) is fixedly connected to the pressing plate (711), and a connecting plate (713) is coaxially fixed to one end of the connecting rod (712) located in the movable cavity (512).

4. The intelligent electric regulating valve according to claim 3, characterized in that: A plurality of positioning plates (522) located in the annular cavity (72) are fixedly connected to the sealing sleeve (52), and a filter screen (523) is provided between two adjacent positioning plates (522).

5. The intelligent electric regulating valve according to claim 4, characterized in that: The sealing sleeve (52) is rotatably connected to the fixed sleeve (51); an elastic member (513) is provided in the movable cavity (512); a rotating mechanism (8) is provided in the movable cavity (512); the connecting plate (713) and the rotating mechanism (8) form a rotatable fit; when the connecting plate (713) is reset under the action of the elastic member (513), the movable member (71) drives the sealing sleeve (52) to rotate.

6. The intelligent electric regulating valve according to claim 5, characterized in that: The rotating mechanism (8) comprises a guide groove (81) formed on the inner wall of the movable cavity (512), the guide groove (81) comprising a plurality of vertical grooves (811) and oblique grooves (812) connected end to end, a plurality of guide posts (82) are fixedly connected to the inner wall of the movable cavity (512), and the guide posts (82) are located at the connection between the vertical grooves (811) and the oblique grooves (812), a guide plate (83) is rotatably connected to the guide post (82), a torsion spring is provided between the guide plate (83) and the guide post (82), and a limit block (84) located on one side of the guide plate (83) is fixedly connected to the inner wall of the movable cavity (512); A connecting pin (85) is fixedly connected to the circumferential side of the connecting plate (713), and the connecting pin (85) slides in the guide groove (81). A plurality of the positioning plates (522) are each provided with a clamping groove (86), and a clamping block (87) matching the clamping groove (86) is fixedly connected to the circumferential side of the pressing plate (711).

7. The intelligent electric regulating valve according to claim 6, characterized in that: An annular plate (524) is fixedly connected to the sealing sleeve (52), a positioning groove (514) matching the annular plate (524) is provided on the fixing sleeve (51), and the annular plate (524) is rotatably connected to the positioning groove (514).

8. The intelligent electric regulating valve according to claim 7, characterized in that: 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); and a placement groove matching the knob (92) is provided in the valve head (42).

9. The intelligent electric regulating valve according to claim 8, characterized in that: The actuator (2) comprises 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); limit plates (24) and scale plates (25) are arranged on both sides of the support frame (23); and a pointer (26) cooperating with the scale plate (25) is arranged on the indicator (22).

10. 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 9, characterized in that: The following steps are involved: Step 1: Before using the regulating valve, install the valve sleeve (5) on the valve head (42). The specific steps are as follows: S101: According to the pipeline pressure and usage requirements, the knob (92) is turned to adjust the initial distance between the regulating plate (9) and the connecting plate (713); the greater the operating pressure of the pipeline, the closer the initial distance between the regulating plate (9) and the connecting plate (713); S102: Align the connector (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); Step 2: Debug the regulating valve. The specific steps are as follows: S201: The valve core (4) is driven by the actuator (2) to approach the valve seat (3), so that the horizontal surface of the valve sleeve (5) contacts the sealing ring (54) on the sealing seat (53) and forms a seal; S202: by comparing the readings of the pointer (26) of the actuator (2) and the scale plate (25), checking whether the pointer (26) is located at the corresponding position when the valve is in the fully open state and the closed state; Step 3: Use the regulating valve normally and control the actuator (2) to drive the valve core (4) to move; Step 4: If the sealing ring (54) on the sealing seat (53) is aged or worn on one side, the contact pressure between the valve sleeve (5) and the sealing ring (54) is adjusted by adjusting the relative position of the valve stem (41) and the connecting shaft (21).

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