An electric heating actuator with switching function

Abstract

This utility model discloses an electrothermal actuator with a switching function, comprising a housing, a paraffin valve core disposed within the housing, the paraffin valve core including a push rod, a valve core cylinder disposed outside the paraffin valve core, a knob disposed on the upper side of the valve core cylinder, a spring disposed on the side of the valve core cylinder, the knob engaging a switching knob located on the upper side of the paraffin valve core, a crescent groove disposed on the side of the switching knob facing the paraffin valve core, the depth of the crescent groove decreasing from one end to the other, a crescent plate integrally connected to the side of the paraffin valve core facing the switching knob and disposed within the crescent groove, and a triangular apex disposed at the lower end of the valve core cylinder. This utility model has the advantage of manually switching to a normally open state.

Description

Technical Field

[0001] This utility model relates to the field of electrothermal actuators, specifically an electrothermal actuator with switching function. Background Technology

[0002] In water-based heating or central air conditioning water systems, closed-loop valves can be automatically controlled by electric actuators. These actuators utilize a paraffin-coated actuator to control the valve's opening and closing. When a temperature increase is needed, the paraffin-coated actuator expands upon heating, automatically raising the valve stem and opening the valve for heating. Conversely, when a temperature decrease is needed, the actuator's power is turned off, causing it to contract and lower the valve stem, closing the valve and stopping heating. However, existing electric actuators only have automatic opening and closing functions and lack manual operation. In the event of a power outage, they cannot be manually opened or closed. Therefore, the actuator may cut off hot water flow to the pipes after a power failure, potentially leading to pipe freezing and rupture. Summary of the Invention

[0003] The purpose of this invention is to provide an electric heating actuator with a switching function to solve the problems mentioned in the background art, which has the advantage of manually switching the normally open state.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an electric heating actuator with switching function, comprising a housing, a paraffin valve core disposed within the housing, the paraffin valve core including a push rod, a valve core cylinder disposed outside the paraffin valve core, a knob disposed on the upper side of the valve core cylinder, a spring disposed on the side of the valve core cylinder, the knob engaging a switching button located on the upper side of the paraffin valve core, a crescent groove disposed on the side of the switching button facing the paraffin valve core, the depth of the crescent groove decreasing from one end to the other, a crescent plate integrally connected to the side of the paraffin valve core facing the switching button and located within the crescent groove, and a triangular apex disposed at the lower end of the valve core cylinder.

[0005] By adopting the above technical solution, the valve is normally closed when no power is applied. When power is applied, the top rod of the paraffin valve core slowly rises, which drives the valve core cylinder to move upward. The valve core cylinder drives the knob to move upward and compresses the spring. After the valve core cylinder moves upward, the triangular top no longer has the downward pressing force, and the valve top rod will lift the triangular top, thus opening the valve. When the power is cut off, the top rod of the paraffin valve core retracts, the spring presses the valve core cylinder downward, the valve core cylinder presses the triangular apex downward, and the triangular apex presses the valve's top rod downward, thus closing the valve. After the power is off, rotate the knob counterclockwise until the arrow is aligned with OPEN. The knob will then rotate the switch knob, which in turn will rotate the crescent groove. This will cause the crescent plate and the crescent groove to rotate relative to each other. This process will lift the valve core cylinder, and the valve's push rod will lift the triangular top, thus opening the valve. Therefore, the valve is normally open whether the power is on or off.

[0006] As a further embodiment of this utility model: the side of the valve core cylinder is integrally connected with a placement plate for facilitating the placement of the spring.

[0007] By adopting the above technical solution, the placement plate facilitates the placement of the spring.

[0008] Compared with the prior art, the beneficial effects of this utility model are: When not powered, it is normally closed. When powered, the top rod of the paraffin valve core slowly rises, which will drive the valve core cylinder to move upward. The valve core cylinder drives the knob to move upward and compresses the spring. After the valve core cylinder moves upward, the triangular apex no longer has the downward pressing force, and the valve top rod will lift the triangular apex, opening the valve. When the power is cut off, the top rod of the paraffin valve core retracts, the spring presses the valve core cylinder downward, the valve core cylinder presses the triangular apex downward, and the triangular apex presses the valve's top rod downward, thus closing the valve. After the power is off, rotate the knob counterclockwise until the arrow is aligned with OPEN. The knob will then rotate the switch knob, which in turn will rotate the crescent groove. This will cause the crescent plate and the crescent groove to rotate relative to each other. This process will lift the valve core cylinder, and the valve's push rod will lift the triangular top, thus opening the valve. Therefore, the valve is normally open whether the power is on or off. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of an embodiment; Figure 2 for Figure 1 Top view; Figure 3 for Figure 2 A cross-sectional view along the AA direction; Figure 4 This is a schematic diagram of the switching button in the embodiment; Figure 5 This is a schematic diagram of the crescent-shaped plate in an embodiment.

[0010] In the diagram: 1. Housing; 2. Paraffin valve core; 3. Valve core cylinder; 4. Knob; 5. Spring; 6. Switch button; 7. Crescent groove; 8. Crescent plate; 9. Triangular apex; 10. Placement plate. Detailed Implementation

[0011] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0012] In this embodiment of the utility model, An electrothermal actuator with switching function, such as Figures 1-5 As shown, the device includes a housing 1, a paraffin valve core 2 inside the housing 1, the paraffin valve core 2 including a push rod, a valve core cylinder 3 outside the paraffin valve core 2, a knob 4 on the upper side of the valve core cylinder 3, a spring 5 on the side of the valve core cylinder 3, a switching knob 6 on the upper side of the valve core 2 being engaged with the knob 4, a crescent groove 7 on the side of the switching knob 6 facing the paraffin valve core 2, the depth of the crescent groove 7 decreasing from one end to the other, a crescent plate 8 integrally connected to the side of the paraffin valve core 2 facing the switching knob 6 and located within the crescent groove 7, and a triangular top 9 at the lower end of the valve core cylinder 3.

[0013] The valve core cylinder 3 has an integrally connected placement plate 10 for placing the spring 5.

[0014] Working principle: When not powered, it is normally closed. When powered, the top rod of the paraffin valve core 2 slowly rises, which will drive the valve core cylinder 3 to move upward. The valve core cylinder 3 drives the knob 4 to move upward and compresses the spring 5. After the valve core cylinder 3 moves upward, the triangular top 9 no longer has the downward pressing force, and the valve top rod will push the triangular top 9 up, and the valve will open. When the power is cut off, the top rod of the paraffin valve core retracts, the spring 5 presses the valve core cylinder 3 down, the valve core cylinder 3 presses the triangular top 9 down, the triangular top 9 presses the valve's top rod down, and the valve closes. After the power is off, rotate knob 4 counterclockwise. When the arrow is aligned with OPEN, knob 4 will drive switch knob 6 to rotate. Switch knob 6 will drive crescent groove 7 to rotate, which will cause crescent plate 8 and crescent groove 7 to rotate relative to each other. This process will cause valve core cylinder 3 to lift up. The valve rod will then lift the triangular top 9, and the valve will open. Thus, it is normally open whether the power is on or off.

[0015] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An electrothermal actuator with switching function, comprising a housing (1), characterized in that: The housing (1) is provided with a paraffin valve core (2), which includes a push rod. A valve core cylinder (3) is provided on the outside of the paraffin valve core (2). A knob (4) is provided on the upper side of the valve core cylinder (3). A spring (5) is provided on the side of the valve core cylinder (3). The knob (4) is engaged with a switching knob (6) located on the upper side of the paraffin valve core (2). A crescent groove (7) is provided on the side of the switching knob (6) facing the paraffin valve core (2). The depth of the crescent groove (7) decreases from one end to the other. A crescent plate (8) located in the crescent groove (7) is integrally connected to the side of the paraffin valve core (2) facing the switching knob (6). A triangular top (9) is provided at the lower end of the valve core cylinder (3).

2. The electrothermal actuator with switching function according to claim 1, characterized in that: The valve core cylinder (3) has an integrally connected placement plate (10) for placing the spring (5).

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