Electric control valve

Abstract

The utility model relates to the technical field of regulating valves, in particular to an electric regulating valve. The electric control valve comprises a valve body, a ball seat and a sealing ball core are arranged in the valve body, a valve rod is fixedly installed on the sealing ball core, and a cross-shaped lock groove is formed in the top end of the valve rod. The mounting frame is fixedly mounted at the top end of the valve body, a driving shaft is rotationally mounted at the top end of the mounting frame, a plug connector in butt joint with the valve rod is mounted at the bottom end of the driving shaft, and the top end of the driving shaft is fixedly sleeved with a worm gear; the supporting end base is fixedly installed at the top end of the installation frame, a worm is rotationally installed on the supporting end base, the worm is meshed with the worm gear, a servo motor is fixedly installed at the position, located on one side of the worm, of the installation frame, and a transmission piece used for transmission connection of the servo motor and the worm is installed on the supporting end base. The electric control valve provided by the utility model has the advantage of convenience and reliability in electric and manual switching.

Description

Technical Field

[0001] The utility model relates to the technical field of regulating valves, in particular to an electric regulating valve. Background Art

[0002] An electric regulating valve is composed of an electric actuator and a regulating valve connected and combined, and then formed into an electric regulating valve through mechanical connection assembly, debugging and installation. The electric regulating valve is an important actuator instrument in industrial automation process control. When a heating enterprise supplies heat through pipelines, an electric regulating valve is needed to adjust the flow of water in the heating pipeline. The electric regulating valve is installed at the return main pipeline of each unit and at the outlet of the main valve of each community for water flow control.

[0003] However, when the existing electric regulating valve is in use, when the electric actuator drives the valve stem to rotate, when the electric actuator fails accidentally, the power mechanism (servo motor, rotary motor) for driving the rotation of the valve stem has a self-locking mechanism. Once self-locked, it is difficult to quickly manually adjust the start and stop of the control valve.

[0004] Therefore, it is necessary to provide an electric regulating valve to solve the above technical problems. Summary of the Utility Model

[0005] To solve the above technical problems, the utility model provides an electric regulating valve.

[0006] The electric regulating valve provided by the utility model includes: a valve body, in which a ball seat and a sealing ball core are arranged, a valve stem is fixedly installed on the sealing ball core, and a cross lock groove is opened at the top end of the valve stem;

[0007] A mounting frame is fixedly installed at the top end of the valve body, and a driving shaft is rotatably installed at the top end of the mounting frame. A plug-in part for docking with the valve stem is installed at the bottom end of the driving shaft, and a worm gear is fixedly sleeved at the top end of the driving shaft;

[0008] A supporting end seat is fixedly installed at the top end of the mounting frame, and a worm is rotatably installed on the supporting end seat. The worm meshes with the worm gear. A servo motor is fixedly installed on the mounting frame on one side of the worm, and a transmission part for driving connection between the servo motor and the worm is installed on the supporting end seat;

[0009] A controller is installed on the mounting frame and electrically connected to the servo motor.

[0010] Preferably, the plug-in part includes an extension rod, the extension rod is fixedly installed at the bottom end of the driving shaft, and an electric rod is embedded in the extension rod. The output end of the electric rod is fixedly installed with a cross plug, and the cross plug is in plug-in fit with the cross lock groove. The electric rod is electrically connected to the controller.

[0011] Preferably, a chute is formed through the bottom of the extension rod, and a sliding plate that is slidably engaged with the chute is fixedly installed at the top end of the cross-shaped insertion rod.

[0012] Preferably, a protective cover is fixedly installed on the mounting frame. The protective cover covers the support end seat, the servo motor, the transmission member, and the controller, and a transparent glass is embedded on one side of the protective cover.

[0013] Preferably, the transmission member includes a U-shaped frame fixedly installed on one side of the support end seat. A sliding frame is installed on the U-shaped frame. Key shaft rods are rotatably installed at both ends of the sliding frame. Key shaft grooves that are inserted and matched with the key shaft rods are formed at both ends of the worm. A transfer sleeve that is inserted and matched with the key shaft rods is fixedly sleeved on the output end of the servo motor. A lead screw is installed on the U-shaped frame in a transmission manner. A transmission piece is fixedly installed on the sliding frame. A threaded through hole that is threadedly connected with the lead screw is formed in the transmission piece. One end of the lead screw is fixedly installed with an extension rod. One end of the extension rod passes through the protective cover and is fixedly installed with a knob. A manual operation rod is fixedly installed on the key shaft rod on the side of the sliding frame away from the servo motor. One end of the manual operation rod passes through the protective cover and is fixedly installed with a handwheel.

[0014] Preferably, the shortest distance between the key shaft rods at both ends of the sliding frame is greater than the length of the worm.

[0015] Preferably, an indicating rod is rotatably installed on the protective cover. The indicating rod is fixedly connected coaxially with the drive shaft. An indicating arrow is fixedly installed at the top end of the indicating rod. A scale is provided on the protective cover outside the indicating arrow.

[0016] Compared with the related art, the electric control valve provided by the present invention has the following beneficial effects:

[0017] 1. The present invention provides an electric control valve. By arranging a transmission member between the worm and the servo motor, the transmission member uses the cooperation of the U-shaped frame, the sliding frame, the key shaft rod, the lead screw, the transmission piece, the extension rod, the knob, the manual operation rod, and the handwheel, which is convenient for flexibly switching the transmission between the servo motor and the worm and the transmission between the manual operation rod and the worm, and is convenient for quickly performing manual operation when the electric control fails.

[0018] 2. The plug-in member can be used to quickly install and dock between the drive shaft and the valve rod. The overall structure is simple, which is convenient for later installation, disassembly, maintenance, and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a preferred embodiment of the electric control valve provided by the present invention;

[0020] Figure 2Schematic structural diagram of the transmission part provided by the present utility model;

[0021] Figure 3 Schematic structural diagram of another perspective of the transmission part provided by the present utility model;

[0022] Figure 4 For Figure 1 Partial enlarged view of A shown;

[0023] Figure 5 Schematic structural diagram of the mounting bracket provided by the present utility model with a protective cover installed thereon;

[0024] Figure 6 Schematic structural diagram of the protective cover provided by the present utility model.

[0025] Reference numerals in the figure: 1, valve body; 2, valve stem; 201, cross lock groove; 3, mounting bracket; 31, drive shaft; 32, worm gear; 4, plug-in part; 41, extension rod; 42, electric rod; 43, cross plug; 44, slide plate; 401, chute; 5, support end seat; 51, worm; 501, key shaft groove; 6, servo motor; 61, adapter sleeve; 7, transmission part; 71, U-shaped frame; 72, sliding frame; 73, key shaft rod; 74, lead screw; 75, transmission piece; 76, extension rod; 761, knob; 77, manual operating rod; 78, hand wheel; 8, controller; 9, protective cover; 91, transparent glass; 92, indicating rod; 93, indicating arrow; 94, opening meter. Detailed implementation manners

[0026] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0027] The following describes the specific implementation of the present utility model in detail with specific embodiments.

[0028] Embodiment 1:

[0029] Please refer to Figures 1 to 4 , an electric control valve provided in Embodiment 1 of the present utility model, the electric control valve includes:

[0030] Valve body 1, a ball seat and a sealing ball core are arranged in the valve body 1, a valve stem 2 is fixedly installed on the sealing ball core, and a cross lock groove 201 is opened at the top end of the valve stem 2;

[0031] Mounting bracket 3, fixedly installed at the top end of the valve body 1, and a drive shaft 31 is rotatably installed at the top end of the mounting bracket 3. A plug-in part 4 for docking with the valve stem 2 is installed at the bottom end of the drive shaft 31, and a worm gear 32 is fixedly sleeved at the top end of the drive shaft 31;

[0032] The supporting end seat 5 is fixedly installed at the top of the mounting frame 3, and a worm 51 is rotatably installed on the supporting end seat 5. The worm 51 meshes with the worm gear 32. A servo motor 6 is fixedly installed on the mounting frame 3 on one side of the worm 51. A transmission member 7 for driving connection between the servo motor 6 and the worm 51 is installed on the supporting end seat 5;

[0033] The controller 8 is installed on the mounting frame 3 and electrically connected to the servo motor 6.

[0034] The transmission member 7 includes a U-shaped frame 71. The U-shaped frame 71 is fixedly installed on one side of the supporting end seat 5, and a sliding frame 72 is installed on the U-shaped frame 71. Key shaft rods 73 are rotatably installed at both ends of the sliding frame 72. Key shaft grooves 501 for inserting and mating with the key shaft rods 73 are provided at both ends of the worm 51. A transfer sleeve 61 for inserting and mating with the key shaft rods 73 is fixedly sleeved on the output end of the servo motor 6. A lead screw 74 is installed on the U-shaped frame 71 in a driving manner. A transmission piece 75 is fixedly installed on the sliding frame 72. A threaded through hole for threaded connection with the lead screw 74 is provided on the transmission piece 75. One end of the lead screw 74 is fixedly installed with an extension rod 76. One end of the extension rod 76 passes through the protective cover 9 and is fixedly installed with a knob 761. A manual operation rod 77 is fixedly installed on the key shaft rod 73 on the side of the sliding frame 72 away from the servo motor 6. One end of the manual operation rod 77 passes through the protective cover 9 and is fixedly installed with a handwheel 78.

[0035] It should be noted that: during use, after overall assembly, when the valve body 1 is docked to the pipeline through the flange structures on both sides and the overall opening needs to be controlled, the controller 8 is used to control the servo motor 6 to drive the worm 51 to rotate through the transmission member 7. The worm 51 meshes with the worm gear 32, thereby driving the drive shaft 31 to rotate. The drive shaft 31 drives the valve stem 2 to rotate synchronously through the plug-in member 4, and then adjusts the opening of the valve to achieve flow regulation. When the electric control is normal, one end of the key shaft rod 73 near the servo motor 6 is inserted into the transfer sleeve 61, and the other end is inserted into the key shaft groove 501 provided on the worm 51, thereby realizing normal transmission. When the electric control fails and manual operation is required, the knob 761 is turned to drive the extension rod 76 to drive the lead screw 74 to rotate. Thus, the lead screw 74 drives the transmission piece 75 to drive the sliding frame 72 to slide along the U-shaped frame 71 until the key shaft rod 73 near the servo motor 6 is withdrawn from the key shaft groove 501 at this end. After complete withdrawal, the key shaft rod 73 at the other end is inserted into the key shaft groove 501 at this end, so that the manual operation rod 77 forms a driving connection with the worm 51. In this way, by rotating the handwheel 78, the worm 51 can be driven to drive the worm gear 32 to rotate, thereby driving the drive shaft 31 to rotate and realizing manual adjustment operation. The overall transmission switching is stable and reliable.

[0036] It should be noted that when electronically controlled here, the operation of the servo motor 6 is controlled by the controller 8. The controller 8 uses the control components commonly used in electric control valves in the prior art and can perform remote control operations after being connected to the upper computer, which is convenient for real-time online remote supervision.

[0037] In this embodiment: the shortest distance between the key shaft rods 73 at both ends of the sliding frame 72 is greater than the length of the worm 51. This facilitates when one end of the key shaft rod 73 is completely inserted into the key shaft groove 501 at this end of the worm 51, the other end of the key shaft rod 73 exits from the key shaft groove 501. Thus, when switching is required, it is only necessary to switch the key shaft rod 73 at different ends to be inserted into the key shaft groove 501.

[0038] In the embodiment of the present utility model, please refer to Figures 1 to 4 , the plug-in member 4 includes an extension rod 41. The extension rod 41 is fixedly installed at the bottom end of the drive shaft 31, and an electric rod 42 is embedded in the extension rod 41. The output end of the electric rod 42 is fixedly installed with a cross plug rod 43. The cross plug rod 43 is in plug-in fit with the cross lock groove 201. The electric rod 42 is electrically connected to the controller 8;

[0039] It should be noted that when the plug-in member 4 is used, during installation, after the valve stem 2 is installed on the valve body 1, adjust the angle of the valve stem 2 to align its cross lock groove 201 with the cross plug rod 43, and then start the electric rod 42 to drive the cross plug rod 43 to insert into the cross lock groove 201, thus completing the transmission connection between the drive shaft 31 and the valve stem 2. When disassembly is required, control the electric rod 42 to contract, which is very convenient for disassembly and is convenient for later disassembly and maintenance.

[0040] In this embodiment: a chute 401 is formed through the bottom of the extension rod 41. The top end of the cross plug rod 43 is fixedly installed with a slide plate 44 that is in sliding fit with the chute 401. In this way, when the cross plug rod 43 is pushed to slide, under the limiting cooperation of the slide plate 44 and the chute 401, its sliding is more stable.

[0041] Embodiment Two:

[0042] On the basis of Embodiment One, in this Embodiment Two, please refer to Figures 1 to 6 , a protective cover 9 is fixedly installed on the mounting frame 3. The protective cover 9 covers the support end seat 5, the servo motor 6, the transmission member 7 and the controller 8, and a transparent glass 91 is embedded on one side of the protective cover 9;

[0043] It should be noted that in this way, the protective cover 9 provides protection for the servo motor 6, the transmission member 7 and the controller 8, avoiding damage caused by long-term exposure, and the transparent glass 91 is provided to facilitate observing the internal situation;

[0044] In this embodiment: An indicating rod 92 is rotatably installed on the protective cover 9. The indicating rod 92 is coaxially and fixedly connected to the driving shaft 31. And an indicating arrow 93 is fixedly installed at the top end of the indicating rod 92. An opening scale 94 is provided on the protective cover 9 outside the indicating arrow 93. In this way, when adjusting the opening of the valve body 1, the indicating rod 92 rotates synchronously with the driving shaft 31. Thus, by the cooperation of the indicating arrow 93 and the opening scale 94, the opening of the regulating valve can be visually observed.

[0045] The working principle of the electric regulating valve provided by the present utility model is as follows:

[0046] During use, after overall assembly, when the valve body 1 is docked to the pipeline through the flange structures on both sides and the overall opening needs to be controlled, the controller 8 is used to control the servo motor 6 to drive the worm 51 to rotate through the transmission member 7. The worm 51 meshes with the worm gear 32, thereby driving the driving shaft 31 to rotate. The driving shaft 31 drives the valve stem 2 to rotate synchronously through the plug-in member 4, and further adjusts the opening of the valve, realizing flow regulation. When the electric control is normal, one end of the key shaft rod 73 near the servo motor 6 is inserted into the adapter sleeve 61, and the other end is inserted into the key shaft groove 501 opened on the worm 51, thereby realizing normal transmission. When the electric control fails and manual operation is required, turn the knob 761 to drive the extension rod 76 to drive the lead screw 74 to rotate. Thus, the lead screw 74 drives the transmission piece 75 to drive the sliding frame 72 to slide along the U-shaped frame 71 until the key shaft rod 73 near the servo motor 6 is withdrawn from the key shaft groove 501 at this end. After complete withdrawal, the key shaft rod 73 at the other end is inserted into the key shaft groove 501 at this end, so that the manual operating rod 77 forms a transmission connection with the worm 51. In this way, by rotating the handwheel 78, the worm 51 can be driven to drive the worm gear 32 to rotate, thereby driving the driving shaft 31 to rotate, realizing manual adjustment operation. The overall transmission switching is stable and reliable;

[0047] Furthermore, the protective cover 9 provides protection for the servo motor 6, the transmission member 7 and the controller 8, avoiding damage caused by long-term exposure, and a transparent glass 91 is provided for observing the internal situation. An indicating rod 92 is rotatably installed on the protective cover 9. The indicating rod 92 is coaxially and fixedly connected to the driving shaft 31. And an indicating arrow 93 is fixedly installed at the top end of the indicating rod 92. An opening scale 94 is provided on the protective cover 9 outside the indicating arrow 93. In this way, when adjusting the opening of the valve body 1, the indicating rod 92 rotates synchronously with the driving shaft 31. Thus, by the cooperation of the indicating arrow 93 and the opening scale 94, the opening of the regulating valve can be visually observed.

[0048] The circuits and controls involved in the present utility model are all prior arts and will not be elaborated here.

[0049] The above are only embodiments of the present utility model, and do not thereby limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall equally be included within the patent protection scope of the present utility model.

Claims

1. An electric regulating valve, comprising: A valve body (1), wherein a ball seat and a sealing ball core are arranged in the valve body (1), a valve stem (2) is fixedly mounted on the sealing ball core, and a cross lock groove (201) is formed at the top end of the valve stem (2); It is characterized by further comprising: A mounting frame (3) is fixedly mounted on the top of the valve body (1), and a driving shaft (31) is rotatably mounted on the top of the mounting frame (3), a plug-in component (4) that is connected to the valve stem (2) is mounted on the bottom of the driving shaft (31), and a worm gear (32) is fixedly sleeved on the top of the driving shaft (31); A support end seat (5) is fixedly mounted on the top of the mounting frame (3), and a worm (51) is rotatably mounted on the support end seat (5), the worm (51) meshing with the worm wheel (32), a servo motor (6) is fixedly mounted on one side of the worm (51) on the mounting frame (3), and a transmission member (7) for transmission connection between the servo motor (6) and the worm (51) is mounted on the support end seat (5); A controller (8) is mounted on the mounting frame (3) and is electrically connected to the servo motor (6).

2. The electric regulating valve according to claim 1, characterized in that: The plug connector (4) comprises an extension rod (41), the extension rod (41) being fixedly mounted on the bottom end of the drive shaft (31), and an electric rod (42) being embedded in the extension rod (41), a cross plug rod (43) being fixedly mounted on the output end of the electric rod (42), the cross plug rod (43) being plugged into and matched with a cross lock groove (201), and the electric rod (42) being electrically connected to a controller (8).

3. The electric regulating valve according to claim 2, characterized in that: A sliding groove (401) is formed through the bottom of the extension rod (41), and a sliding plate (44) that slidably matches the sliding groove (401) is fixedly mounted on the top of the cross insertion rod (43).

4. The electric regulating valve according to claim 1, characterized in that: A protective cover (9) is fixedly mounted on the mounting frame (3), wherein the protective cover (9) covers the support end seat (5), the servo motor (6), the transmission member (7) and the controller (8), and a transparent glass (91) is embedded on one side of the protective cover (9).

5. The electric regulating valve according to claim 4, characterized in that: The transmission member (7) comprises a U-shaped frame (71), the U-shaped frame (71) is fixedly mounted on one side of the support end seat (5), and a sliding frame (72) is mounted on the U-shaped frame (71), key shafts (73) are rotatably mounted on both ends of the sliding frame (72), key shaft grooves (501) for plugging and matching with the key shaft (73) are formed on both ends of the worm (51), an output end fixed sleeve of the servo motor (6) is provided with an adapter sleeve (61) for plugging and matching with the key shaft (73), and a lead screw (74) is transmission-mounted on the U-shaped frame (71). A transmission plate (75) is fixedly mounted on the sliding frame (72), the transmission plate (75) is provided with a threaded through hole threadedly connected to the lead screw (74), and an extension rod (76) is fixedly mounted on one end of the lead screw (74), one end of the extension rod (76) passes through the protective cover (9) and is fixedly mounted with a knob (761), and a manual operating rod (77) is fixedly mounted on the key shaft rod (73) on the side of the sliding frame (72) away from the servo motor (6), and one end of the manual operating rod (77) passes through the protective cover (9) and is fixedly mounted with a hand wheel (78).

6. The electric regulating valve according to claim 5, characterized in that: The shortest distance between the key shaft rods (73) at both ends of the sliding frame (72) is greater than the length of the worm (51).

7. The electric regulating valve according to claim 4, characterized in that: An indicator rod (92) is rotatably mounted on the protective cover (9), the indicator rod (92) is coaxially fixedly connected to the drive shaft (31), and an indicator arrow (93) is fixedly mounted on the top end of the indicator rod (92), and an opening gauge (94) is provided on the protective cover (9) outside the indicator arrow (93).

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