An electric flow control valve

Abstract

The present invention discloses an electric flow regulating valve, including a valve and an electric actuator. The valve includes a valve body, one side of the valve body is threadedly connected to a valve cover, the valve body and the valve cover are respectively provided with screw holes for connecting with pipelines, a valve core is provided inside the valve body, the valve core includes a valve stem box, a valve stem, a cam, and two sealing members, the upper end of the valve stem passes through the valve stem box, the sealing member is slidably arranged on the valve stem box, and extends into the screw hole or retracts from the screw hole, the positioning member passes through the valve body and is fixed to the box; the electric actuator is provided with a main control module inside, a driving motor, a gearbox and an output shaft that are driven in sequence, and the output shaft is threadedly fixed to the valve stem. In the present invention, the valve core is fixed by the valve stem box and the positioning member, the valve stem drives the cam to rotate under the drive of the output shaft, and the sealing member moves axially in the valve body to adjust the valve opening, the valve switch can be driven with very little force, and the valve will not rust and cannot be opened.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to an electric flow regulating valve. Background Art

[0002] The weather in northern regions is cold in winter, and currently, the main means of heating is centralized heating. For areas with centralized heating, uneven heating and cooling often occur during the heating period, that is, there is a hydraulic imbalance in the secondary heating network, resulting in higher indoor temperatures for some users and lower indoor temperatures for others. In order to solve this problem, the previous methods were to install various hydraulic balancing valves or to manually adjust the opening of the valves to adjust the heating supply of each branch of the heating system. Such methods are difficult to meet the needs of current heating companies. In recent years, with the advancement of science and technology, intelligent heating has also begun to be promoted and popularized in the field of heating. However, the regulation of the heating network is ultimately achieved by adjusting and controlling the opening of the valve (or the on-off time). Therefore, the choice of valves is particularly important.

[0003] At present, the most commonly used valves at the end of the heating network are electric ball valves, followed by electric heating stop valves and a small number of balancing valves. These valves have fatal defects in actual use:

[0004] (1) Electric heating stop valve, the valve opening is small, the pressure loss is large, and it is easy to get clogged;

[0005] (2) The balancing valve has a small diameter, is easy to clog, has a complex structure and is costly;

[0006] (3) The ball of the electric ball valve fits tightly with the seals at both ends. The ball needs to be clamped in place by the seals on both sides. Therefore, it is very easy for the valve to be stuck by debris when used in the heating system. In particular, after a certain period of use, scale will form, causing the valve to rust and fail to work properly. In addition, the ball in the valve is separate from the valve stem. After the ball rusts, the valve stem is very easy to be twisted out.

[0007] In view of this, there is an urgent need for a special electric valve specifically used in the heating field to achieve easy operation, not easy to clog and extend the service life. Summary of the invention

[0008] The technical problem to be solved by the present invention is to make up for the deficiencies of the above-mentioned prior art and provide an electric valve with small switching force requirement, no clogging, no jamming, simple structure, adjustable opening and good single linearity.

[0009] The present invention is achieved by the following technical means: an electric flow control valve, comprising:

[0010] A valve, comprising a valve body, one side of which is threadedly connected to a valve cover, the valve body and the valve cover are respectively provided with screw holes for connecting to a pipeline, a valve core is provided inside the valve body, the valve core comprises a valve stem box, a valve stem rotatably arranged on the valve stem box, a cam fixed on the valve stem, and two sealing members connected to the cam, the upper end of the valve stem passes through the valve stem box, the sealing member is slidably arranged on the valve stem box and extends into or retracts from the screw hole, and a positioning member passes through the valve body and is fixed to the box;

[0011] The electric actuator is provided with a main control module inside, which sequentially transmits a driving motor, a gearbox and an output shaft. An opening detection mechanism is provided on the outer side of the gearbox. The output shaft is threadedly fixed to the valve stem. After the electric actuator receives the control instruction from the main control module, the valve stem and the cam are driven to rotate clockwise or counterclockwise through the output shaft, and the two seals move outward or inward synchronously, and the gap between the two screw holes and the seals becomes smaller or larger, thereby adjusting the flow rate.

[0012] In another preferred embodiment, the cam is provided with two symmetrical eccentric protrusions, the protrusions are provided with an arc-shaped cam groove, the inner end of the seal is provided with a socket, the inner end of the connecting piece is placed in the cam groove, and the outer end is inserted into the socket, the outer peripheral surface of the protrusion is a working surface, and as the cam rotates, the inner end of the connecting piece slides in the cam groove, and the working surface remains in contact with the seal.

[0013] In another preferred embodiment, an annular boss is provided at the inner end of the screw hole, the outer peripheral surface of the sealing element is a conical surface, and the annular boss and the conical surface form a flow space for the liquid.

[0014] In another preferred embodiment, a valve stem cover is clamped on the top of the valve stem box, the top of the valve stem cover abuts against the inner wall of the valve body, a positioning hole is provided at the bottom of the valve stem box, a threaded fixing hole is provided at the bottom of the valve body, the positioning piece is rod-shaped, passes through the fixing hole and enters the positioning hole, and a sealing cap is screwed into the fixing hole to fix the positioning piece.

[0015] In another preferred embodiment, an integrally formed valve stem sleeve is provided on the top of the valve stem cover, a protruding valve stem hole is provided on the valve body, a valve stem groove is provided on the bottom inner wall of the valve body, a sealing ring is provided between the valve stem and the valve stem sleeve, and the valve stem passes through the valve stem hole, the valve stem cover, and the cam in sequence from top to bottom and is placed in the valve stem groove.

[0016] In another preferred embodiment, a guide groove is provided on the inner side surface of the valve stem cover, and the connecting member is placed in the guide groove.

[0017] In another preferred embodiment, the connecting member is U-shaped.

[0018] In another preferred embodiment, the main control module is provided with an opening detection module, a temperature measurement module, a communication module, a motor drive module, and a power supply module, and the opening detection module receives the signal of the opening detection mechanism.

[0019] In another preferred embodiment, the top end of the valve stem is flat and is engaged with the output shaft, and the valve stem and the output shaft are fixed by a nut.

[0020] Compared with the prior art, in the present invention, the valve core is fixed by a valve stem box and a positioning piece, the valve stem drives the cam to rotate under the drive of the output shaft, and the sealing member makes axial movement in the valve body to adjust the valve opening. Except when the valve is closed, the left and right sealing members do not contact the valve body in other states. Therefore, the required force is very small, that is, a very small force is needed to drive the valve to open and close, and the left and right sealing members basically do not contact the valve body, and the valve will not rust and cannot be opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A perspective view of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the electric actuator of the present invention;

[0023] Figure 3 This is a functional schematic diagram of the main control module in the present invention;

[0024] Figure 4 A three-dimensional diagram of a valve of the present invention;

[0025] Figure 5 A longitudinal sectional view of the valve of the present invention;

[0026] Figure 6 is a transverse cross-sectional view of the valve of the present invention;

[0027] Figure 7 It is an axonometric view of the valve core in the flow control valve of the present invention;

[0028] Figure 8 is a three-dimensional diagram of a seal of the present invention;

[0029] Fig. 9 It is a three-dimensional view of the valve stem cover of the present invention. DETAILED DESCRIPTION

[0030] The present invention provides an electric flow control valve, the valve core is fixed by a valve stem box and a positioning member, the valve stem drives the cam to rotate under the drive of the output shaft, and the sealing member moves axially in the valve body to adjust the valve opening. Except when the valve is closed, the left and right sealing members do not contact the valve body in other states. Therefore, the required force is very small, that is, the valve switch can be driven with very small force, and the left and right sealing members basically do not contact the valve body, and the valve will not rust and cannot be opened. The present invention is described in detail below in conjunction with the drawings and specific embodiments of the specification.

[0031] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0032] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] like Figure 1 As shown, the present invention provides an electric flow control valve, including a valve 20 and an electric actuator 10.

[0035] like Figure 4 , 5 and Figure 6 As shown, the valve 20 includes a valve body 23, one side of the valve body 23 is threadedly connected to the valve cover 21, the valve body 23 and the valve cover 21 are respectively provided with screw holes 230 for connecting with the pipeline, the valve body 23 is provided with a valve core 22 inside, the valve core 22 includes a valve stem box 222, a valve stem 224 rotatably arranged on the valve stem box 222, a cam 228 fixed on the valve stem 224, and two sealing members 221 connected to the cam 228, the upper end of the valve stem 224 passes through the valve stem box 222, the sealing member 221 is slidably arranged on the valve stem box 222, and extends into the screw hole 230 or retracts from the screw hole 230, and the positioning member 24 passes through the valve body 23 and is fixed to the box. In this embodiment, the valve stem 224 drives the cam 228 to rotate forward or reversely, and the cam drives the sealing member 221 to move axially, extend outward or retract inward, thereby controlling the gap between the valve core 22 and the pipeline, thereby achieving the effect of controlling the water flow in the pipeline.

[0036] like Figure 2 and 3 As shown, the electric actuator 10 is provided with a main control module 14, a driving motor 13, a gearbox 11 and an output shaft 15 which are sequentially driven, an opening detection mechanism 12 is correspondingly provided on the outer side of the gearbox 11, and the output shaft 15 is threadedly fixed with the valve stem 224. After the electric actuator 10 receives the control instruction of the main control module 14, the valve stem 224 and the cam 228 are driven to rotate clockwise or counterclockwise through the output shaft 15, and the two seals 221 move outward or inward synchronously, and the gap between the two screw holes 230 and the seals 221 becomes smaller or larger, thereby adjusting the flow rate. In this embodiment, the electric actuator 10 realizes automatic control of the flow rate, and the opening detection mechanism 12 can further improve the control accuracy on the basis of automatic control.

[0037] Among them, the main control module 14 can collect the temperature of the heating system, can collect the opening data of the valve 20, can upload data, can accept the control instructions issued by the host computer, and can issue control instructions to the actuator; the electric actuator 10 can drive the valve stem 224 of the valve 20 to rotate through the output shaft 15 to control the opening of the valve 20 to achieve the purpose of flow regulation. The electric actuator 10 can control the valve 20 to fully open or fully close, and can also be adjusted arbitrarily within the range of 0° to 90°.

[0038] like Figure 6 As shown, in another preferred embodiment, the cam 228 is provided with two symmetrical eccentric protrusions, and an arc-shaped cam groove 2281 is provided on the protrusions. The inner end of the seal 221 is provided with a plug hole 2210, and the inner end of the connector 227 is placed in the cam groove 2281, and the outer end is inserted into the plug hole 2210. The outer peripheral surface of the protrusion is a working surface 2282. As the cam 228 rotates, the inner end of the connector 227 slides in the cam groove 2281, and the working surface 2282 is kept in contact with the seal 221. In this embodiment, the cam groove 2281 is arc-shaped, and different positions have different distances from the center of the cam 228. The farther from the center of the cam 228, the farther the seal 221 is from the cam 228, and the more the seal 221 protrudes outward. It can be seen that when the cam 228 rotates, the seal 221 controls the sealing degree of the pipeline by using its own shape structure.

[0039] like Figure 5 As shown, further, the connecting member 227 is U-shaped. The connecting member 227 is used to connect the sealing member 221 to ensure that the sealing member 221 and the cam 228 are kept in close contact.

[0040] In another preferred embodiment, an annular boss is provided at the inner end of the screw hole 230, and the outer peripheral surface of the seal 221 is a conical surface, and the annular boss and the conical surface form a flow space for the liquid. In this embodiment, the flow space formed by the annular boss and the conical surface is conical, which facilitates the flow of liquid, reduces liquid splashing, and reduces the resistance of the seal 221 during movement.

[0041] In another preferred embodiment, the top of the valve stem box 222 is clamped with a valve stem cover 225, the top of the valve stem cover 225 is against the inner wall of the valve body 23, the bottom of the valve stem box 222 is provided with a positioning hole, the bottom of the valve body 23 is provided with a threaded fixing hole, the positioning member 24 is rod-shaped, passes through the fixing hole and enters the positioning hole, and the sealing cap 25 is screwed into the fixing hole to fix the positioning member 24. In this embodiment, the sealing cap 25 is used to position the valve stem box 222 to ensure the stability of the internal components of the valve stem box 222. The sealing cap 225 can also be manually adjusted for accuracy.

[0042] Furthermore, an integrally formed valve stem sleeve is provided on the top of the valve stem cover 225, a protruding valve stem hole is provided on the valve body 23, a valve stem groove is provided on the bottom inner wall of the valve body 23, a sealing ring 223 is provided between the valve stem 224 and the valve stem hole, and the valve stem 224 passes through the valve stem hole, the valve stem cover 225, the cam 228 and, from top to bottom, and is placed in the valve stem groove. In this embodiment, the valve stem 224 transmits torque in the radial direction. Since the structural feature of the valve stem 224 is a long rod shape, the valve stem hole, the valve stem cover 225, the cam 228 and the valve stem groove can effectively ensure its rigidity and ensure the stability of power transmission.

[0043] Alternatively, further, a guide groove 2251 is provided on the inner side of the valve stem cover 225, and the connecting member 227 is placed in the guide groove 2251. In this embodiment, the moving direction of the connecting member 227 is axial, and the guide groove 2251 defines the moving track of the connecting member 227, thereby improving the stability of the connecting member 227 and the sealing member 221, and preventing the sealing member 221 from shaking under the impact force of the water flow.

[0044] In another preferred embodiment, the main control module 14 is provided with an opening detection module, a temperature measurement module, a communication module, a motor drive module, and a power supply module, and the opening detection module receives the signal of the opening detection mechanism 12. The opening detection structure specifically includes a Hall element and two magnets on a certain transmission gear. When the gear rotates, the Hall element collects two pulses for each rotation, and the opening of the valve is judged by the number of collected pulses.

[0045] In another preferred embodiment, the top end of the valve stem 224 is flat, and is clamped with the output shaft 15, and the valve stem 224 and the output shaft 15 are fixed by a nut 16. In this embodiment, the valve stem 224 is linked with the output shaft 15 of the electric actuator 10, is flat and adopts a clamping structure, so that the torque transmission capacity is stronger.

[0046] The working process of the present invention is as follows:

[0047] After the main control module 14 of the electric actuator 101 receives the action command, the driving motor 13 starts to rotate in the direction given by the output command, and transmits the power to the output shaft 15 through the gearbox 1111. The output shaft 15 drives the valve stem 224 and the cam 228 on the valve 2 to rotate, so as to adjust the opening of the valve 2.

[0048] (1) When the valve stem 224 rotates counterclockwise, the cam 228 also rotates counterclockwise, and the distance between the working surface 2282 of the cam 228 and the rotation center of the cam 228 becomes farther and farther. The working surface 2282 of the cam 228 pushes the left seal 221 and the right seal 226 to move outward, and the opening of the valve 2 gradually decreases. When the two seals 221 are in contact with the valve cover 21 and the valve body 23 and are pressed against each other, the valve stem 224 stops rotating, and the valve 2 is closed.

[0049] (2) When the valve stem 224 rotates clockwise, the cam 228 rotates clockwise, and the distance between the working surface 2282 of the cam 228 and the rotation center of the cam 228 becomes closer and closer. Under the control of the guide groove 2251 of the valve core upper cover 225, the connecting member 227 pulls the two sealing members 221 to move axially inward, and the opening of the valve 2 gradually increases. When the connecting member 227 moves to the lowest point of the cam groove 2281, the valve stem 224 stops rotating, and the valve 2 is fully opened.

[0050] Since the valve core box adopts a two-seal structure design, when the valve is in the closed state, the outer ends of the two seals are respectively subjected to water flow pressure. The water flow pressure on the end face of the seal on one side is consistent with the direction of valve movement, and the water flow pressure on the end face inside the other side seal is opposite to the direction of water flow. The two forces are almost the same in size, so the two forces basically cancel each other out, causing the valve stem to rotate, the valve to open, and the two seals to move inward. The required force is very small, so that a larger valve can be driven by a smaller actuator.

[0051] Compared with the prior art, in the present invention, the valve core is fixed by a valve stem box and a positioning piece, the valve stem drives the cam to rotate under the drive of the output shaft, and the sealing member makes axial movement in the valve body to adjust the valve opening. Except when the valve is closed, the left and right sealing members do not contact the valve body in other states. Therefore, the required force is very small, that is, a very small force is needed to drive the valve to open and close, and the left and right sealing members basically do not contact the valve body, and the valve will not rust and cannot be opened.

[0052] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone should be aware that any structural changes made under the inspiration of the present invention, and any technical solutions that are the same or similar to the present invention, fall within the protection scope of the present invention.

Claims

1. An electric flow control valve, characterized in that: include: A valve, comprising a valve body, one side of which is threadedly connected to a valve cover, the valve body and the valve cover are respectively provided with screw holes for connecting to a pipeline, a valve core is provided inside the valve body, the valve core comprises a valve stem box, a valve stem rotatably arranged on the valve stem box, a cam fixed on the valve stem, and two sealing members connected to the cam, the upper end of the valve stem passes through the valve stem box, the sealing member is slidably arranged on the valve stem box and extends into or retracts from the screw hole, and a positioning member passes through the valve body and is fixed to the body of the valve stem box; The electric actuator is provided with a main control module inside, a driving motor, a gearbox and an output shaft that are sequentially driven, an opening detection mechanism is correspondingly provided on the outer side of the gearbox, and the output shaft is threadedly fixed to the valve stem. After the electric actuator receives the control instruction of the main control module, the valve stem and the cam are driven to rotate clockwise or counterclockwise through the output shaft, and the two sealing members move outward or inward synchronously, and the gap between the two screw holes and the sealing members becomes smaller or larger, thereby adjusting the flow rate; The cam is provided with two symmetrical eccentric protrusions, the protrusions are provided with arc-shaped cam grooves, the inner end of the sealing member is provided with an insertion hole, the inner end of the connecting member is placed in the cam groove, and the outer end is inserted into the insertion hole, the outer peripheral surface of the protrusion is a working surface, and as the cam rotates, the inner end of the connecting member slides in the cam groove, and the working surface is kept in contact with the sealing member; The top of the valve stem box is clamped with a valve stem cover, the top of the valve stem cover is against the inner wall of the valve body, the bottom of the valve stem box is provided with a positioning hole, the bottom of the valve body is provided with a threaded fixing hole, the positioning piece is rod-shaped, passes through the fixing hole and enters the positioning hole, and the sealing cap is screwed into the fixing hole to fix the positioning piece; An integrally formed valve stem sleeve is provided on the top of the valve stem cover, a protruding valve stem hole is provided on the valve body, a valve stem groove is provided on the bottom inner wall of the valve body, a sealing ring is provided between the valve stem and the valve stem sleeve, and the valve stem passes through the valve stem hole, the valve stem cover, and the cam in sequence from top to bottom and is placed in the valve stem groove; A guide groove is provided on the inner side surface of the valve stem cover, and the connecting piece is placed in the guide groove; An annular boss is arranged at the inner end of the screw hole, and the outer peripheral surface of the sealing member is a conical surface. The annular boss and the conical surface form a flow space for the liquid.

2. The electric flow control valve according to claim 1, characterized in that: The connecting piece is U-shaped.

3. The electric flow control valve according to claim 1, characterized in that: The main control module is provided with an opening detection module, a temperature measurement module, a communication module, a motor drive module, and a power supply module. The opening detection module receives the signal of the opening detection mechanism.

4. The electric flow control valve according to claim 1, characterized in that: The top end of the valve stem is flat and is engaged with the output shaft, and the valve stem and the output shaft are fixed by a nut.

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