Multifunctional waterproof electric heating actuator

Abstract

This invention relates to a multifunctional waterproof electrothermal actuator. It solves the technical problem that existing electrothermal actuators cannot automatically reset to electronic control mode after manual activation. It includes a detachably connected fixed housing and a base. A connecting nut for connecting a valve is provided on the outer side of the base. An electrothermal drive assembly is movably housed inside the fixed housing. A manual component, rotatable relative to the fixed housing, is movably located at the end of the fixed housing away from the base. A self-resetting component is provided between the manual component and the electrothermal drive assembly, allowing the manual component to reset when the electrothermal drive assembly is activated; alternatively, a pin assembly, mutually positioned with the electrothermal drive assembly, is provided at the end of the fixed housing away from the base. Advantages include: automatic reset and quick-opening functions; the use of a cylindrical helical torsion spring, allowing the movable housing to automatically reset upon energization after manual activation; and special nuts on the movable and fixed housings, reducing the rotation angle and number of turns during manual activation, making manual activation more convenient.

Description

Technical Field

[0001] This invention belongs to the technical field of HVAC temperature control devices, specifically relating to a multifunctional waterproof electric heating actuator. Background Technology

[0002] Electric thermostats, also known as electric thermostatic controllers, are widely used in floor and ceiling radiant heating and cooling systems, air conditioning systems, radiator heating systems, and other systems requiring temperature control or fluid on / off control. Electric thermostats should be used in conjunction with regulating valves. The electric thermostat automatically switches the controlled loop based on signals received from the indoor thermostat or other electrical switches.

[0003] Electrothermal actuators are specifically used in the electric drive components of branch valves in water distribution systems, small valves, and dynamically balancing valves. They operate silently, feature a simple and quick nut-connection installation, and are easy to disassemble. The working principle of an electrothermal actuator is to control the opening and closing of the valve through the thermal expansion and contraction of a heating element. For normally open electrothermal actuators, when the operating voltage is applied, the heating element is heated, and after a rest period, it uniformly performs the closing process. When the voltage is interrupted, the heating element gradually cools, and after a rest period, the actuator opens. The process is reversed for normally closed actuators.

[0004] Since most electric heating actuators on the market use automatic switching and generally do not have manual adjustment functions, users cannot manually turn them on or off when a power outage occurs or the electric heating actuator malfunctions, thus making the electric heating actuator unable to cope with emergencies.

[0005] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses an electrothermal actuator [200920187875.1], which includes an upper cap, a housing, a base, a lower cap, and a paraffin filter with an electric heater connected together. A boss is provided on the top of the housing, and three curved slides are evenly arranged around the boss. A limiting protrusion is provided at the left end of the curved slide, and a positioning concave surface is provided at the right end of the limiting protrusion. The right end of the positioning concave surface is a curved slope. The upper cap is sleeved with the boss, and three fulcrums are evenly arranged around the inner side of the upper cap. The three fulcrums abut against the lowest position of the positioning concave surface or the curved slope, respectively.

[0006] The above solution has solved the problem to some extent that existing electric heating actuators cannot be manually shut down during power outages. However, the solution still has many shortcomings, such as the inability to directly switch to the electric control mode after manual activation. It requires manually shutting down the actuator and then turning on the electric control mode, otherwise the electric control mode will be ineffective. Summary of the Invention

[0007] The purpose of this invention is to address the above-mentioned problems by providing a multifunctional waterproof electrothermal actuator.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a multifunctional waterproof electrothermal actuator, comprising a fixed housing and a base connected together, wherein a connecting nut for connecting a valve is provided on the outer side of the base, and an electrothermal drive assembly that is linked to the valve and can move up and down within the fixed housing is provided inside the fixed housing, wherein a movable component that can rotate relative to the fixed housing is provided at the end of the fixed housing away from the base, wherein the movable component moves toward the end away from the base in the open state and in the opposite direction in the closed state, and is linked with the electrothermal drive assembly, wherein a self-resetting component is provided between the movable component and the electrothermal drive assembly, which can reset the movable component when the electrothermal drive assembly is energized and turned on; or, a pin assembly that is mutually positioned with the electrothermal drive assembly is provided at the end of the fixed housing away from the base.

[0009] In the aforementioned multifunctional waterproof electrothermal actuator, the electrothermal drive assembly includes a wire harness seal movably disposed between the base and the fixed housing via a reset structure. A temperature bulb fixing component is inserted into the wire harness seal, and a paraffin temperature bulb with a movable pin at one end is inserted into the temperature bulb fixing component. The paraffin temperature bulb and the temperature bulb fixing component are connected by a first snap-fit ​​assembly. Two copper electrode plates are provided on the paraffin temperature bulb. The copper electrode plates pass through the outside of the temperature bulb fixing component and are connected to a connecting wire in a lead wire slot located on the outside of the temperature bulb fixing component. The connecting wire is connected to a conductive wire harness extending to the outside of the fixed housing. A movable sealing component is provided at the end of the paraffin temperature bulb with the movable pin, and the movable pin acts on the movable sealing component.

[0010] In the aforementioned multifunctional waterproof electric heating actuator, the movable component includes a movable housing that is rotatably disposed at one end of the fixed housing and has an open sleeve-shaped upper end. The upper end of the wire harness seal passes through the upper end of the movable housing and is sealed by a top cover. The movable housing and the fixed housing are connected by a special threaded connection structure or a common threaded connection structure. The movable housing is linked with the wire harness seal by a shaft elastic retaining ring.

[0011] In the aforementioned multifunctional waterproof electric heating actuator, the specially designed threaded connection structure includes a protruding threaded structure on the outer side of the upper part of the fixed housing, and a protruding rib structure on the inner circumferential wall of the movable housing that mates with the protruding threaded structure. The protruding threaded structure on the outer side of the fixed housing determines the travel and trajectory of the movable housing. The outer side of the end of the wire harness seal that passes through the upper end of the movable housing has an annular groove, and a shaft elastic retaining ring or the aforementioned pin assembly is installed in the annular groove.

[0012] In the aforementioned multifunctional waterproof electric heating actuator, the self-resetting component includes a cylindrical helical torsion spring, a top surface notch on the wire harness wrapping component, and top surface rib notches that are perpendicular to the top surface notch on the movable housing. One end of the cylindrical helical torsion spring acts on the top surface notch, and the other end acts on the top surface rib notch.

[0013] In the aforementioned multifunctional waterproof electric heating actuator, the temperature bulb fixing component and the wire harness sealing component are structurally sealed by potting adhesive, and the outer circumferential side of the movable sealing component and the inner circumferential side of the temperature bulb fixing component are sealed by a circumferential sealing structure. The potting adhesive structure includes several openings on the top surface of the lower end of the temperature bulb fixing component. The openings are connected to the gap between the temperature bulb fixing component and the wire harness sealing component, and the gap is filled with sealant injected through the openings. The wire harness sealing component is a sleeve with one open end. The temperature bulb fixing component is partially inserted into the sleeve, and the end face with the opening is located outside the wire harness sealing component. The temperature bulb fixing component and the wire harness sealing component are connected by a second snap-fit ​​assembly. The circumferential sealing structure includes an annular protrusion on the outer circumferential side of the movable sealing component. The annular protrusion contacts and engages with the inner circumferential wall of the temperature bulb fixing component, and an annular sealing groove is provided circumferentially on the annular protrusion. An O-ring seal is provided in the annular sealing groove, which abuts against the inner circumferential wall of the temperature bulb fixing component.

[0014] In the aforementioned multifunctional waterproof electric heating actuator, one end of the movable seal has a pin groove that abuts against the movable pin of the paraffin heating element, and the protruding cylindrical structure at the other end of the movable seal is inserted into the circular hole at the top of the circular boss located in the middle of the base top wall.

[0015] In the aforementioned multifunctional waterproof electric heating actuator, the top of the fixed housing is provided with a through hole and the upper end of the wire harness seal passes through the through hole. The lower end of the temperature bulb fixing component abuts against the top surface of the base. The upper end of the wire harness seal abuts against the top wall of the housing through a reset structure, and the reset structure is a large spring. The base and the fixed housing are connected by a third snap-fit ​​assembly.

[0016] In the aforementioned multifunctional waterproof electric heating actuator, the temperature bulb fixing component is a sleeve-shaped component with an open lower end, and two fan-shaped protrusions are provided on the lower end wall of the temperature bulb fixing component. The top wall of the base is provided with two fan-shaped openings. The fan-shaped protrusions of the temperature bulb fixing component can move up and down and pass through the fan-shaped openings. The conductive wire harness is set on the temperature bulb fixing component, passes through the wire harness seal, and is led out from the wire harness outlet on the base. The base is snapped together with the connecting nut. The inner wall of the connecting nut has an internal thread that mates with the external thread of the regulating valve.

[0017] In the aforementioned multifunctional waterproof electric heating actuator, stainless steel pull tabs are connected between the fan-shaped protrusions, and the fan-shaped protrusions and stainless steel pull tabs are connected by a fourth snap-fit ​​assembly. A snap-fit ​​portion is provided on the inner wall of the fan-shaped protrusions. A curved thin sheet facing upwards and opposite to the fan-shaped protrusions is provided around the periphery of the circular thin sheet. The outer wall of the curved thin sheet contacts the inner wall of the fan-shaped protrusions, and the notch on the side wall of the curved thin sheet engages with the snap-fit ​​portion. The lower end of the stainless steel pull tab is a circular thin sheet, and the center of the circular thin sheet has a [feature / feature] for... The valve core is connected to the gourd-shaped port or the circular thin plate connected to the valve stem of the regulating valve; or, the fan-shaped protrusion is snapped to the bottom support, the bottom support being a rectangular block with two opposite short sides that are curved, the curved surfaces having snap-fit ​​positions that mate with the fan-shaped protrusion, and the base being replaced with a bottom wall having a concave surface that mates with the bottom support, which can be used with most valves on the market; or, the base can be replaced with one that does not require a connecting nut, and can be connected to a quick valve simply by using a special valve seat and a U-shaped pin.

[0018] Compared with existing technologies, the advantages of this invention are:

[0019] 1. It can be manually opened or closed. The elastic retaining ring makes the movable housing and the wiring harness seal an integrated component, which can achieve a linkage effect. It can be manually opened or closed when the electric heating actuator is not powered on.

[0020] 2. Automatic reset: A cylindrical helical torsion spring is used so that the movable outer shell can automatically reset after being manually opened and powered on.

[0021] 3. To prevent disengagement during rotation of the housing, a flexible retaining ring is used to limit the vertical movement of the movable housing, preventing it from disengaging during rotation. This also prevents excessive force during rotation from damaging the limit switch and causing the housing to disengage.

[0022] 4. Anti-scaling: The gourd-shaped opening on the stainless steel pull plate can be used with the special regulating valve stem to achieve a linkage effect. When the paraffin heating element needle extends, it eventually drives the regulating valve stem to move upward. This can solve the problem of the valve core sticking to the scale when the regulating valve has not been used for a long time, and the valve core cannot spring up on its own when the actuator is opened.

[0023] 5. Quick opening: The special threads on the movable and fixed outer shells reduce the angle and number of rotations required for manual opening, requiring only a 90° rotation, making manual opening more convenient.

[0024] 6. Excellent waterproof performance, reaching IP55 or above, preventing water from entering the interior of the temperature bulb fixing component, thus giving the electric heating actuator good waterproof performance, which can be used in refrigeration system products and reduce the actuator damage rate.

[0025] 7. Quick connection: Using a base without connecting nuts, the actuator base is inserted into a special valve seat during installation. The U-shaped pin is then inserted into the side of the base to complete the actuator installation, which greatly improves the installation efficiency of the actuator. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention.

[0027] Figure 2 This is an exploded view of the structure of Embodiment 1 of the present invention.

[0028] Figure 3 This is a structural cross-sectional view of Embodiment 1 of the present invention.

[0029] Figure 4 This is a schematic diagram of the structure of the temperature bulb fixing component in Embodiment 1 of the present invention.

[0030] Figure 5 This is a schematic diagram of the structure of the movable seal in Embodiment 1 of the present invention.

[0031] Figure 6 This is a schematic diagram of the structure of the movable outer shell in Embodiment 1 of the present invention.

[0032] Figure 7 This is an application scenario diagram of Embodiment 1 of the present invention.

[0033] Figure 8 This is a structural schematic diagram of Embodiment 3 of the present invention.

[0034] Figure 9 This is a structural schematic diagram of Embodiment 3 of the present invention.

[0035] Figure 10 This is a schematic diagram of the structure of Embodiment 4 of the present invention.

[0036] Figure 11 This is a structural schematic diagram of Embodiment 5 of the present invention.

[0037] In the diagram: Fixed housing 1, self-resetting assembly 11, cylindrical helical torsion spring 111, pin assembly 12, through hole 13, wire harness outlet 14, base 2, circular boss 21, circular hole 22, third snap-fit ​​assembly 23, fan-shaped through hole 24, concave surface 25, connecting nut 3, internal thread 31, electric heating drive assembly 4, wire harness seal 41, annular groove 411, top surface notch 412, second snap-fit ​​assembly 413, reset structure 42, large spring 421, movable assembly 5, movable housing 51, top cover 511, top surface rib notch 512, shaft elastic retaining ring 52, temperature bulb fixing component 6, paraffin temperature bulb 61, movable ejector pin 611, Electrode copper sheet; 612, First snap-fit ​​assembly; 62, Connecting wire; 63, Conductive wire harness; 64, Potting structure; 65, Through port; 651, Sealant; 652, Fan-shaped protrusion; 66, Snap-fit ​​part; 661, Movable seal; 7, Circumferential sealing structure; 71, Annular protrusion; 711, Annular sealing groove; 712, O-ring; 713, Pin groove; 72, Protruding cylindrical structure; 73, Special threaded connection structure; 8, Protruding threaded structure; 81, Protruding rib structure; 82, Stainless steel pull tab; 9, Circular thin sheet; 91, Gourd-shaped through port; 911, Curved thin sheet; 92, Bottom support; 101, Curved surface; 102, Snap-fit ​​part; 103. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0039] Example 1

[0040] like Figure 1 , Figure 2 , Figure 3 The invention relates to a multifunctional waterproof electrothermal actuator, comprising a fixed housing 1 and a base 2 connected together. A connecting nut 3 for connecting a valve is provided on the outer side of the base 2. An electrothermal drive assembly 4, which is linked to the valve and can move up and down within the fixed housing 1, is provided inside the fixed housing 1. A movable assembly 5, which is rotatable relative to the fixed housing 1, is provided at the end of the fixed housing 1 away from the base 2. The movable assembly 5 moves towards the end away from the base 2 in the open state and in the opposite direction in the closed state, and is linked to the electrothermal drive assembly 4. A self-resetting assembly 11 is provided between the movable assembly 5 and the electrothermal drive assembly 4, which resets the movable assembly 5 when the electrothermal drive assembly 4 is energized. The self-resetting assembly 11 allows the electrothermal actuator to automatically reset and switch to electric control mode after being energized when manually turned on, eliminating the need for manual shutdown and improving the overall convenience of the actuator.

[0041] The electrothermal drive assembly 4 includes a wire harness seal 41 movably disposed between the base 2 and the fixed housing 1 via a reset structure 42. A heating element fixing component 6 is also inserted into the wire harness seal 41. A paraffin heating element 61 with a movable pin 611 at one end is inserted into the heating element fixing component 6, and the paraffin heating element 61 and the heating element fixing component 6 are connected by a first snap-fit ​​assembly 62. Two copper electrode plates 612 are also provided on the paraffin heating element 61. These copper electrode plates 612 protrude from the outside of the heating element fixing component 6 and connect to a connecting wire 6 disposed in a lead wire slot on the outside of the heating element fixing component 6. 3 are connected, and the connecting wire 63 is connected to the conductive wire harness 64 extending to the outside of the fixed housing 1. A movable seal 7 is provided at one end of the paraffin heating bulb 61 with a movable pin 611. The movable pin 611 acts on the movable seal 7. The paraffin heating bulb 61 can expand when heated after the electric heating actuator is energized, thereby pushing the movable pin 611 upward and pushing the heating bulb fixing part 6 and the movable seal 7 upward, thereby controlling the opening of the valve. When the movable pin 611 retracts, the reset mechanism 42 pushes the heating bulb fixing part 6 and the movable seal 7 to reset, and the valve closes.

[0042] Furthermore, the movable component 5 includes a movable housing 51 rotatably disposed at one end of the fixed housing 1 and having an open sleeve shape at the upper end. The upper end of the wire harness seal 41 passes through the upper end of the movable housing 51 and is closed by the top cover 511 on the movable housing 51. The movable housing 51 and the fixed housing 1 are connected by a special threaded connection structure 8 or a common threaded connection structure, and the movable housing 51 is linked with the wire harness seal 41 by a shaft elastic retaining ring 52.

[0043] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, the special threaded connection structure 8 includes a protruding threaded structure 81 on the outer side of the upper part of the fixed housing 1, and a protruding rib structure 82 on the inner wall of the movable housing 51 that mates with the protruding threaded structure 81. The protruding threaded structure 8 on the outer side of the fixed housing 1 determines the travel and trajectory of the movable housing 51. When the movable housing 51 is rotated, it will move upward. The threaded structure on the outer side of the upper part of the fixed housing 1 is specially designed to limit the initial rotation direction of the movable housing 51 to counterclockwise, the rotation angle to 90°, and the maximum upward movement distance to 4mm. Finally, the movable housing 51 is stuck at the 90° position due to the limitation of the threaded structure on the outer circumferential surface of the fixed housing 1. Conversely, the initial rotation direction of the movable housing 51 when it is closed is clockwise, the rotation angle is 90°, and it moves downward to the bottom. The wire harness seal 41 has an annular groove 411 on the outer side of the end that passes through the upper end of the movable housing 51, and the groove height of the annular groove 411 exceeds the top surface of the movable housing 51. A shaft elastic retaining ring 52 is installed in the annular groove 411, so that the movable housing 51, the temperature bulb fixing part 6, and the movable seal 7 are integrated. When the movable housing 51 is manually rotated upward, it will drive the temperature bulb fixing part 6 and the movable seal 7 to move upward, and the valve will be manually opened. Conversely, it controls the valve to be manually closed. This function can be manually opened or closed when the electric actuator is not powered, which makes it easier to quickly debug the valve water circuit.

[0044] The self-resetting assembly 11 includes a cylindrical helical torsion spring 111. A top surface notch 412 is provided on the wiring harness seal 41, and a top surface rib notch 512 is provided on the movable housing 51, which is perpendicular to the top surface notch 412. One short side of the cylindrical helical torsion spring 111 acts on the top surface notch 412, and the other long side acts on the top surface rib notch 512. The initial angle of the two sides of the cylindrical helical torsion spring 111 is 180°, the assembly angle is 90°, and the working angle is 0°.

[0045] Furthermore, the structure 65 is sealed between the temperature sensor fixing component 6 and the wire harness sealing component 41 by potting adhesive, and the outer circumference of the movable sealing component 7 and the inner circumference of the temperature sensor fixing component 6 are sealed by a circumferential sealing structure 71. The potting adhesive structure 65 includes several openings 651 provided on the top surface of the lower end of the temperature sensor fixing component 6. These openings 651 are connected to the gap between the temperature sensor fixing component 6 and the wire harness sealing component 41. Sealant 652 is poured into this gap through the openings 651 to prevent water from entering the temperature sensor fixing component 6 along the wires, thus achieving a waterproof effect. Therefore, it can work in a humid environment for a long time, avoiding short circuits or sparks. The sealing element 41 is a sleeve with one open end. The end face of the temperature sensor fixing element 6, which is partially inserted into the sleeve and has a through-hole 651, is located outside the wire harness sealing element 41. The temperature sensor fixing element 6 and the wire harness sealing element 41 are connected by a second snap-fit ​​assembly 413. The circumferential sealing structure 71 includes an annular protrusion 711 disposed on the outer circumference of the movable sealing element 7. The annular protrusion 711 contacts and engages with the inner circumferential wall of the temperature sensor fixing element 6. An annular sealing groove 712 is provided in the circumference of the annular protrusion 711. An O-ring 713 is provided in the annular sealing groove 712 to abut against the inner circumferential wall of the temperature sensor fixing element 6 to prevent water from entering the interior of the temperature sensor fixing element 6 from the bottom.

[0046] like Figure 3 As shown, one end of the movable seal 7 has a pin groove 72 that abuts against the movable pin 611 of the paraffin heat pack 61, and the protruding cylindrical structure 73 at the other end of the movable seal 7 is inserted into the circular hole 22 at the top of the circular boss 21 located in the middle of the top wall of the base 2.

[0047] like Figure 2 , Figure 4 , Figure 7 As shown, the top of the fixed housing 1 is provided with a through hole 13 and the upper end of the wire harness seal 41 passes through the through hole 13. The lower end of the temperature bulb fixing member 6 abuts against the top surface of the base 2. The upper end of the wire harness seal 41 abuts against the top wall of the fixed housing 1 through a reset structure 42, and the reset structure 42 is a large spring 421. The base 2 and the fixed housing 1 are connected by a third snap-fit ​​assembly 23.

[0048] The temperature sensor fixing component 6 is a sleeve-shaped component with an open lower end, and two fan-shaped protrusions 66 are provided on the lower wall of the temperature sensor fixing component 6. The top wall of the base 2 is provided with two fan-shaped openings 24. The fan-shaped protrusions 66 of the temperature sensor fixing component 6 can move up and down and pass through the fan-shaped openings 24. The conductive wire harness 64 is provided on the temperature sensor fixing component 6 and passes through the wire harness seal 41 and is led out from the wire harness outlet 14 on the fixed housing 1. The base 2 is snapped together with the connecting nut 3, and the inner wall of the connecting nut 3 has an internal thread 31 that is connected to the external thread of the regulating valve.

[0049] Furthermore, a stainless steel pull tab 9 is provided between the fan-shaped protrusions 66, and the fan-shaped protrusions 66 and the stainless steel pull tab 9 are connected by a fourth snap-fit ​​assembly. A snap-fit ​​part 661 is provided on the inner wall of the fan-shaped protrusions 66. A curved thin plate 92 facing upward and opposite to the fan-shaped protrusions 66 is provided around the circular thin plate 91. The outer wall of the curved thin plate 92 contacts the inner wall of the fan-shaped protrusions 66, and the notch on the side wall of the curved thin plate 92 cooperates with the snap-fit ​​part 661. The lower end of the stainless steel pull tab 9 is a circular thin plate 91, and the center of the circular thin plate 91 is provided with a gourd-shaped port 911 for connecting to the valve stem of the regulating valve, or the circular thin plate 91 is connected to a valve core.

[0050] The principle of this embodiment is as follows: When the electric actuator is not powered on, the movable housing 51 can be manually rotated to open the valve; the short side of the cylindrical spiral torsion spring 111 on the top surface notch 412 of the wire harness seal 41 remains stationary because the heating element fixing part 6 and the movable seal 7 do not rotate; the long side of the cylindrical spiral torsion spring 111 on the top surface notch 512 of the movable housing 51 rotates because the movable housing 51 rotates. When the movable housing 51 rotates to its limit angle, the angle between the long side and the short side of the cylindrical spiral torsion spring 111 is 0°, so the cylindrical spiral torsion spring 111 is in working state, and the torque between the long side and the short side of the cylindrical spiral torsion spring 111 reaches its maximum. When the electric actuator is powered on at this time, the paraffin heating element 61 is heated, and the movable ejector pin 611 extends and presses against the ejector pin groove 72 of the movable seal 7. Therefore, the heating element fixing part 6 and the movable seal 7 drive the movable housing 51 to move upward, and the paraffin... The movable pin 611 of the paraffin heating element 61 extends more than 4mm. Therefore, when the movable pin 611 of the paraffin heating element 61 extends more than 4mm, it will drive the heating element fixing part 6, the movable seal 7, and the movable housing 51 to continue to move upward. At this time, the thread on the outer circumference of the fixed housing 1 can no longer restrict the rotation of the movable housing 51. Therefore, the long side of the cylindrical helical torsion spring 111 will release the force and drive the movable housing 51 to rotate 90° clockwise. At this time, the rotation angle of the movable housing 51 is restored. When the electric actuator is de-energized, the movable pin 611 of the paraffin heating element 61 gradually retracts. Therefore, the heating element fixing part 6, the movable seal 7, and the movable housing 51 are pushed down by the reset structure 42 to the initial position. At this time, the valve is closed. At this time, the electric actuator has automatically switched from manual mode to electric control mode, eliminating the manual closing action. This function improves the overall operation convenience of the electric actuator.

[0051] Example 2

[0052] This embodiment is basically the same as the first embodiment in terms of structure and working principle. The difference is that the special nuts of the movable outer shell 51 and the fixed outer shell 1 are replaced with ordinary nuts. Because ordinary nuts have self-locking properties, when manually opened or closed, the opening or closing degree of the valve core can be adjusted, thereby adjusting the flow rate of the valve and realizing stepless adjustment.

[0053] Example 3

[0054] This embodiment is basically the same as embodiment one in structure and working principle, except that, as follows: Figure 8 , Figure 9 As shown, the gourd-shaped through hole 911 at the bottom of the stainless steel pull tab 9 in this invention is removed and replaced with a bottom support 101. The fan-shaped protrusion 66 is snapped together with the bottom support 101. The bottom support 101 is a rectangular block-like body with two opposite short sides that are curved surfaces 102. The curved surfaces 102 are provided with snap-fit ​​positions 103 that cooperate with the fan-shaped protrusion 66. The base 2 is also replaced with a bottom wall that has a concave surface 25 to cooperate with the bottom support 101. It can be used with most valves on the market.

[0055] Example 4

[0056] This embodiment is basically the same as embodiment one in structure and working principle, except that, as follows: Figure 10 As shown, the functional components such as the movable housing 51, the shaft elastic retaining ring 52, and the cylindrical helical torsion spring 111 in this invention are removed and replaced with a pin assembly 12, which is used in conjunction with the annular groove 411 at the upper end of the wire harness seal 41, thus creating a pin-type actuator.

[0057] Example 5

[0058] This embodiment is basically the same as embodiment one in structure and working principle, except that, as follows: Figure 11 As shown, the functional components such as the movable housing 51, the shaft elastic retaining ring 52, and the cylindrical helical torsion spring 111 in this invention are removed and replaced with a pin assembly 12, which works in conjunction with the annular groove 411 at the upper end of the wire harness seal 41, resulting in a pin-type actuator. Furthermore, the base 2 is replaced with a base B without a connecting nut. During installation, the actuator base B is inserted into a special valve seat, and the U-shaped pin A is inserted into the side of the base to quickly complete the installation of the actuator, which can greatly improve the installation efficiency of the actuator.

[0059] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0060] Although this paper extensively uses the following components: fixed housing 1, self-resetting assembly 11, cylindrical helical torsion spring 111, pin assembly 12, through hole 13, wire harness outlet 14, base 2, circular boss 21, circular hole 22, third snap-fit ​​assembly 23, fan-shaped through hole 24, concave surface 25, connecting nut 3, internal thread 31, electric heating drive assembly 4, wire harness seal 41, annular groove 411, top surface notch 412, second snap-fit ​​assembly 413, reset structure 42, large spring 421, movable assembly 5, movable housing 51, top cover 511, top surface rib notch 512, shaft elastic retaining ring 52, temperature bulb fixing component 6, paraffin temperature bulb 61, movable ejector pin 611, electrode The terms used include copper sheet 612, first snap-fit ​​assembly 62, connecting wire 63, conductive wire harness 64, potting structure 65, through-hole 651, sealant 652, fan-shaped protrusion 66, snap-fit ​​part 661, movable seal 7, circumferential sealing structure 71, annular protrusion 711, annular sealing groove 712, O-ring 713, ejector pin groove 72, raised cylindrical structure 73, special threaded connection structure 8, protruding threaded structure 81, protruding rib structure 82, stainless steel pull tab 9, circular thin sheet 91, gourd-shaped through-hole 911, curved thin sheet 92, bottom support 101, curved surface 102, snap-fit ​​part 103, etc., but the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A multifunctional waterproof electric heating actuator, comprising a fixed shell (1) and a base (2) connected together, the outer side of the base (2) is provided with a connecting nut (3) for connecting a valve, characterized in that, The fixed shell (1) is provided with an electric heating driving assembly (4) which is linked with the valve and can move up and down in the fixed shell (1), the fixed shell (1) is provided with a movable assembly (5) which can rotate relative to the fixed shell (1) at the end away from the base (2), the movable assembly (5) moves towards the end away from the base (2) in the open state and moves in the opposite direction in the closed state, and is linked with the electric heating driving assembly (4), a self-resetting assembly (11) is arranged between the movable assembly (5) and the electric heating driving assembly (4) to reset the movable assembly (5) after the electric heating driving assembly (4) is powered on, the electric heating driving assembly (4) comprises a wire harness sealing element (41) which is movably arranged between the base (2) and the fixed shell (1) through a reset structure (42), a temperature bag fixing element (6) is inserted into the wire harness sealing element (41), a paraffin temperature bag (61) having a movable thimble (611) at one end is inserted into the temperature bag fixing element (6), and the paraffin temperature bag (61) and the temperature bag fixing element (6) are connected through a first buckle assembly (62); two electrode copper sheets (612) are arranged on the paraffin temperature bag (61), the electrode copper sheets (612) are arranged outside the temperature bag fixing element (6) and are connected with a connecting lead (63) arranged in a lead clamping groove outside the temperature bag fixing element (6), the connecting lead (63) is connected with a conductive wire harness (64) extending to the outside of the fixed shell (1), an movable sealing element (7) is arranged at the end of the paraffin temperature bag (61) having the movable thimble (611), the movable thimble (611) acts on the movable sealing element (7), the movable assembly (5) comprises a movable shell (51) which is rotatably arranged at one end of the fixed shell (1) and has an open sleeve shape at the upper end, the extension distance of the movable thimble (611) is greater than the movement stroke of the movable shell (51), the upper end of the wire harness sealing element (41) passes through the upper end of the movable shell (51) and is closed by a top cover (511), the movable shell (51) and the fixed shell (1) are connected through a special screw thread connection structure (8), the movable shell (51) is linked with the wire harness sealing element (41) through an elastic retaining ring (52) for shaft, the special screw thread connection structure (8) comprises a protruding thread structure (81) arranged on the outer side surface of the fixed shell (1), the movable shell (51) is provided with a protruding rib structure (82) on the inner wall in the circumferential direction, and the protruding thread structure (81) on the outer side surface of the fixed shell (1) determines the movement stroke and trajectory of the movable shell (51).The wire harness seal (41) is provided with an annular groove (411) on one end outside of the upper end of the movable shell (51), an elastic shaft ring (52) is installed in the annular groove (411), the self-resetting assembly (11) comprises a cylindrical spiral torsion spring (111), a top surface notch (412) is arranged on the wire harness seal (41), the movable shell (51) is provided with a top surface muscle position notch (512) which is vertically distributed with the top surface notch (412), and one end of the cylindrical spiral torsion spring (111) acts on the top surface notch (412) and the other end acts in the top surface muscle position notch (512).

2. The multifunctional waterproof electrothermal actuator according to claim 1, characterized in that, The warm bag fixing part (6) and the wire harness sealing part (41) are sealed by glue pouring, and the circumferential outer side of the movable sealing part (7) and the circumferential inner side of the warm bag fixing part (6) are sealed by a circumferential sealing structure (71); the glue pouring structure (65) comprises a plurality of through holes (651) arranged on the top surface of the lower end of the warm bag fixing part (6), the through holes (651) are communicated with the gap between the warm bag fixing part (6) and the wire harness sealing part (41), and the gap is provided with sealing glue (652) poured from the through holes (651); the wire harness sealing part (41) is a sleeve with one end opening, the warm bag fixing part (6) is partially inserted into the sleeve, and the end face of the warm bag fixing part (6) with the through holes (651) is located outside the wire harness sealing part (41); and the warm bag fixing part (6) and the wire harness sealing part (41) are connected by a second buckle assembly (413).

3. The multifunctional waterproof electrothermal actuator according to claim 1, characterized in that, The movable sealing part (7) has a needle groove (72) at one end, which abuts against the movable needle (611) of the paraffin warm bag (61); and the other end of the movable sealing part (7) is provided with a protruding cylindrical structure (73) which is inserted into a circular hole (22) at the top end of a circular boss (21) in the top wall of the base (2).

4. The multi-functional, waterproof, electrically heated actuator of claim 3, wherein, The fixed shell (1) is provided with a through hole (13) at the top, the wire harness sealing part (41) is arranged in the through hole (13), the warm bag fixing part (6) is abutted against the top surface of the base (2), the upper end of the wire harness sealing part (41) is abutted against the top wall of the fixed shell (1) by a reset structure (42), the reset structure (42) is a large spring (421), and the base (2) and the fixed shell (1) are connected by a third buckle assembly (23).

5. The multi-functional, waterproof, electrically heated actuator of claim 4, wherein, The warm bag fixing part (6) is a sleeve with one end opening, and two fan-shaped tabs (66) are arranged on the lower end wall of the warm bag fixing part (6); the top wall of the base (2) is provided with two fan-shaped through holes (24), the fan-shaped tabs (66) of the warm bag fixing part (6) can move up and down and are arranged in the fan-shaped through holes (24), the conductive wire harness (64) is arranged on the warm bag fixing part (6) and passes through the wire harness sealing part (41) and is led out from a wire harness outlet (14) on the fixed shell (1), the base (2) is connected with the connecting nut (3) by clamping, and the inner wall of the connecting nut (3) is provided with an inner thread (31) which is connected with the outer thread of the regulating valve.

6. The multi-functional, waterproof, electrically heated actuator of claim 5, wherein, The fan-shaped tabs (66) are connected with stainless steel pull tabs (9), and the fan-shaped tabs (66) and stainless steel pull tabs (9) are connected through fourth buckle assemblies, and the inner wall surface of the fan-shaped tabs (66) is provided with buckle portions (661), the lower end of the stainless steel pull tabs (9) is a circular sheet (91), the periphery of the circular sheet (91) is provided with a curved sheet (92) upward and opposite to the fan-shaped tabs (66), the outer wall surface of the curved sheet (92) is in contact with the inner wall of the fan-shaped tabs (66), the notch of the side wall surface of the curved sheet (92) is matched with the buckle portions (661), and the middle of the circular sheet (91) is provided with a gourd-shaped through opening (911) for being connected with a valve rod of the regulating valve, or the circular sheet (91) is connected with a valve core.

7. The multi-functional, waterproof, electrically heated actuator of claim 5, wherein, The fan-shaped tabs (66) are buckled and connected with bottom supporting members (101), the bottom supporting members (101) are similar to rectangular block bodies, two opposite short side surfaces are curved surfaces (102), the curved surfaces (102) are provided with buckle positions (103) matched with the fan-shaped tabs (66), and the bottom wall of the base (2) is provided with a concave surface (25) matched with the bottom supporting members (101).

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