Opening and closing mechanism for automatic water level control switch and automatic water level control switch

Abstract

The utility model discloses an opening and closing mechanism for a water level automatic control switch and the water level automatic control switch, the opening and closing mechanism comprises a switch, a swing arm and a floater provided with a lifting rod, the swing arm is connected with the switch, the switch and the swing arm are distributed in the vertical direction, the lifting rod and the floater are distributed in the vertical direction, and the lifting rod is connected with the switch. The swing arm is provided with a magnetic suction head, and the lifting rod is also provided with a magnetic suction head. The opening and closing mechanism has the effects of reducing the space occupied by the opening and closing mechanism and improving the universality of the opening and closing mechanism.

Description

Technical Field

[0001] The present application relates to the field of submersible pump technology, and in particular to an opening and closing mechanism for an automatic water level control switch and an automatic water level control switch. Background Art

[0002] During the use of submersible pumps, an automatic water level switch is required to automatically control the start and stop of the pump. Currently, the two most widely used automatic water level switches on the market are float switch and electronic induction type. The disadvantages of the float switch type are that it requires a large space, the water pump cannot be used in a narrow space, and the float switch type has a limited water level control range, and the low water level shutdown cannot be controlled; the disadvantages of the electronic induction type are that it is expensive, the sensor is prone to failure after long-term use, and the performance of the electronic induction type is not as stable as the mechanical structure, and it is prone to failure and misjudgment due to the influence of water quality.

[0003] In order to reduce the space occupied by the opening and closing mechanism and increase the universality of the opening and closing mechanism, we propose an opening and closing mechanism for an automatic water level control switch.

[0004] In order to increase the universality of the water level automatic control switch, we propose an automatic water level control switch. Utility Model Content

[0005] In order to reduce the space occupied by the opening and closing mechanism and increase the universality of the opening and closing mechanism, the present application provides an automatic water level control switch.

[0006] The present application provides an opening and closing mechanism for an automatic water level control switch using the following technical solution:

[0007] A switching mechanism for an automatic water level control switch comprises a switch, a swing arm, and a float provided with a lifting rod, wherein the swing arm can be connected to the switch, and the switch and the swing arm are distributed in a vertical direction, the lifting rod and the float are distributed in a vertical direction, the swing arm is provided with a magnetic suction head, and the lifting rod is also provided with a magnetic suction head.

[0008] By adopting the above technical scheme, when the float rises with the ambient water level, the float drives the magnetic head to float up through the lifting rod, and when the magnetic head on the lifting rod acts on the magnetic head on the swing arm, the swing arm triggers the switch to turn on, and then the automatic water level switch is in the on state, the submersible pump is started to work, so that the ambient water level of the float continues to drop, and then the magnetic head on the lifting rod moves away from the magnetic head on the swing arm as the float moves downward, the swing arm is reset, the swing arm triggers the switch to turn off, and then the submersible pump is in the off state, and because the swing arm and the switch are distributed up and down, and the lifting rod and the float are distributed up and down, the overall occupied volume of the entire opening and closing mechanism is small, and it is the occupied volume in the vertical direction, so the space requirement for the use environment of the opening and closing mechanism is low, and through the mechanical structure design, the durability of the opening and closing mechanism is increased, so that the opening and closing mechanism can be used under various conditions, thereby increasing the universality of the opening and closing mechanism.

[0009] Preferably, it also includes a magnet cavity, the magnetic head on the lifting rod is located in the magnet cavity, the swing arm and the magnetic head on the swing arm are located outside the magnet cavity, and the magnet cavity separates the magnetic head on the swing arm and the magnetic head on the lifting rod.

[0010] By adopting the above technical solution, the magnetic head on the swing arm and the magnetic head on the lifting rod are separated by using a magnet cavity, so that the environmental water level at the lifting rod position will not affect the switch, the swing arm, and the magnetic head on the swing arm, thereby ensuring that the switch part will not contact with water, increasing the stability of the opening and closing mechanism, and allowing the opening and closing mechanism to be used normally in a variety of liquid environments.

[0011] Preferably, the magnetic head on the lifting rod is called magnet No. 2, and the magnetic head on the swing arm is called magnet No. 1, so that when magnet No. 2 approaches magnet No. 1, the interaction between the magnets can drive the swing arm to move.

[0012] By adopting the above technical solution, the No. 2 magnet rises with the rise of the float through the lifting rod. When the No. 2 float approaches the No. 1 magnet, the interaction between the magnets causes the No. 1 magnet to move, and then the No. 1 magnet drives the swing arm to move. The swing arm movement triggers the switch, and then the switch is turned on. After the environmental water level of the float begins to drop, the No. 2 magnet moves away from the No. 1 magnet, the swing arm and the No. 1 magnet are reset, and the switch is closed.

[0013] Preferably, the magnetic head on the lifting rod is called magnet No. 2, and the magnetic head on the swing arm can be divided into two parts, respectively called magnet No. 1 and magnet No. 3, and the magnet No. 1 and magnet No. 3 are respectively located on both sides of the rising path of the magnet No. 2.

[0014] By adopting the above technical solution, after the No. 2 magnet rises to the preset position, the No. 2 magnet is just located between the No. 1 magnet and the No. 3 magnet. Due to the principle that like charges repel each other and opposite charges attract each other, the swing arm rotates, thereby triggering the switch to turn on. Moreover, since the No. 1 magnet and the No. 3 magnet are separated on both sides of the magnet path, the balance of the entire swing arm is better. Therefore, when installing the swing arm, it can be installed simply and quickly, which effectively shortens the production time and increases the production volume.

[0015] Preferably, one end of the No. 1 magnet near the No. 2 magnet has the same magnetic property as the No. 2 magnet, and one end of the No. 3 magnet near the No. 2 magnet has a different magnetic property from the No. 2 magnet; one end of the No. 1 magnet near the No. 2 magnet has a different magnetic property from the No. 2 magnet, and one end of the No. 3 magnet near the No. 2 magnet has the same magnetic property as the No. 2 magnet; the No. 1 magnet can be interchanged with the No. 3 magnet.

[0016] By adopting the above technical solution, according to the principle of like charges repelling and opposite charges attracting, the swing arm rotates, thereby triggering the switch to turn on.

[0017] Preferably, the swing arm is "U"-shaped.

[0018] By adopting the above technical solution, the second magnet is located in the middle position of the "U"-shaped swing arm, so that after the second magnet rises to the preset position, the second magnet is just located between the first magnet and the third magnet. The "U"-shaped swing arm is conducive to reducing the swing arm obstruction between the switch and the second magnet, so that there is no other device between the magnet cavity and the switch, so that the magnet cavity and the switch can be set in close proximity, and there is no need to deliberately leave a gap between the magnet cavity and the switch, so that the space volume occupied by the magnet cavity, the switch and the swing arm is reduced. By reducing the swing arm part between the switch and the magnet cavity, the layout of the switch, the swing arm and the magnet cavity is optimized, and because the swing arm "U" shape surrounds the outer wall of the magnet cavity, the thickness of the contact surface between the swing arm and the switch can be appropriately increased, without considering the rotation problem of the swing arm between the magnet cavity and the switch and reducing the thickness of the swing arm, thereby enhancing the swing arm's touch and press force on the switch.

[0019] Preferably, the swing arm and the lifting rod are arranged perpendicularly.

[0020] By adopting the above technical solution, since the float itself has a certain volume and is usually flat, and the switch and the swing arm are distributed in the vertical direction, and the lifting rod and the float are distributed in the vertical direction, through the vertical setting of the swing arm and the lifting rod, it is beneficial to unify the overall shape of the opening and closing mechanism by setting the switch part to be flat, and it is beneficial to reduce the space of the overall opening and closing mechanism by setting the switch part to be flat with the same size as the float.

[0021] In order to increase the universality of the automatic water level control switch, the present application provides an automatic water level control switch.

[0022] The present application provides an automatic water level control switch adopting the following technical solution:

[0023] A water level automatic control switch comprises a switch body, a pressure control mechanism and an opening and closing mechanism, wherein the opening and closing mechanism is arranged on the switch body, and the pressure control mechanism is arranged on the switch body.

[0024] By adopting the above technical scheme, when the ambient water level of the automatic water level control switch rises to the preset start-up water level, the opening and closing mechanism drives the automatic water level control switch to open, and the submersible pump starts to work. When the ambient water level of the automatic water level control switch rises to the preset shutdown water level, the submersible pump is in a closed state; the pressure control mechanism controls the air pressure in the automatic water level control switch so that the ambient water level of the opening and closing mechanism rises with the rise of the ambient water level of the automatic water level control switch, but when the ambient water level of the automatic water level control switch drops, the ambient water level of the opening and closing mechanism maintains the position that makes the submersible pump start. When the ambient water level of the automatic water level control switch is at the preset low point, the ambient water level of the opening and closing mechanism begins to drop, and then the submersible pump stops. The pressure control mechanism makes the automatic water level control switch suitable for water level control of different liquids, and various opening and closing mechanisms can realize high water level startup and low water level shutdown of the submersible pump.

[0025] Preferably, the opening and closing mechanism may be an opening and closing mechanism as described in an opening and closing mechanism.

[0026] By adopting the above technical scheme, the opening and closing mechanism uses the buoyancy of the ambient water level of the float to drive the magnetic head of the lifting rod to move up. When the magnetic head on the lifting rod acts on the magnetic head on the swing arm, the swing arm triggers the switch to open, and then the water level automatic switch is in the on state, the submersible pump is started to work, so that the ambient water level of the float continues to drop, and then the magnetic head on the lifting rod moves away from the magnetic head on the swing arm as the float moves downward, the swing arm is reset, the swing arm triggers the switch to close, and then the submersible pump is in the off state; the pressure control mechanism controls the ambient air pressure of the float to make the float The ambient water level of the float rises with the rise of the ambient water level of the water level automatic control switch, but when the ambient water level of the water level automatic control switch drops, the ambient water level of the float maintains the position that makes the switch open. When the ambient water level of the water level automatic control switch is at the preset low point, the ambient water level of the float begins to drop. Since the swing arm and the switch are distributed up and down, and the lifting rod and the float are distributed up and down, the overall occupied volume of the entire water level automatic control switch is smaller, which makes the water level automatic control switch have lower requirements on the volume of the use environment, thereby increasing the universality of the water level automatic control switch.

[0027] Preferably, a switch cavity is provided on the switch body, the switch cavity comprises a first cavity and a second cavity, the second cavity comprises a float cavity and a magnet cavity, and the float cavity is communicated with the magnet cavity.

[0028] By adopting the above technical solution, the second cavity and the first cavity opening and closing mechanism are used to protect some components in the opening and closing mechanism from contacting with liquid as little as possible.

[0029] Preferably, the pressure control mechanism comprises an air inlet channel and a one-way valve, one end of the air inlet channel is connected to the upper side of the float cavity, and the other end is connected to the outside, and the one-way valve is arranged on the air inlet channel.

[0030] By adopting the above technical scheme, when the float cavity is filled with water, the magnetic head on the float switch is connected to the magnetic head on the swing arm, and the ambient water level of the water level automatic control switch gradually decreases. When the ambient water level of the water level automatic control switch drops to the end of the air inlet channel, the gas enters the float cavity from the air inlet channel, and the ambient water level of the float gradually decreases. After the gas enters the float cavity, the magnetic head on the float switch continues to be connected to the magnetic head on the swing arm for a period of time, so that the submersible pump can continue to work for a period of time, thereby making the submersible pump have a lower shutdown water level, which can be as low as 1mm. After the magnetic head on the float switch is separated from the magnetic head on the swing arm, the submersible pump stops, and the liquid in the float cavity gradually drops below the shutdown water level due to the principle of communicating vessels.

[0031] Preferably, the air inlet passage has a switchable air inlet, the second cavity has a switchable water inlet, and the horizontal plane at the position of the switchable air inlet is higher than the horizontal plane at the position of the switchable water inlet.

[0032] By adopting the above technical solution, after the switch air inlet has begun to take air into the float cavity, the second cavity can still be in a water-sealed state through the lower part of the float cavity.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] 1. When the float rises with the environmental water level, the float drives the magnetic head to float through the lifting rod. When the magnetic head on the lifting rod acts on the magnetic head on the swing arm, the swing arm triggers the switch to turn on, and then the automatic water level switch is in the on state. The submersible pump is turned on to work, so that the environmental water level of the float continues to drop. Then the magnetic head on the lifting rod moves away from the magnetic head on the swing arm as the float moves downward, and the swing arm is reset. The swing arm triggers the switch to turn off, and then the submersible pump is in the off state. In addition, since the swing arm and the switch are distributed up and down, and the lifting rod and the float are distributed up and down, the overall occupied volume of the entire opening and closing mechanism is small, and it is the occupied volume in the vertical direction, so the space requirement for the use environment of the opening and closing mechanism is relatively low;

[0035] 2. The second magnet is located in the middle of the "U"-shaped swing arm, so that after the second magnet rises to the preset position, the second magnet is just located between the first magnet and the third magnet. The "U"-shaped swing arm is conducive to reducing the swing arm obstruction between the switch and the second magnet, so that there is no other device between the magnet cavity and the switch, so that the magnet cavity and the switch can be set in close distance, and there is no need to deliberately leave a gap between the magnet cavity and the switch, so that the space occupied by the magnet cavity, the switch and the swing arm is reduced. By reducing the swing arm part between the switch and the magnet cavity, the layout of the switch, the swing arm and the magnet cavity is optimized, and because the swing arm "U" shape surrounds the outer wall of the magnet cavity, the thickness of the contact surface between the swing arm and the switch can be appropriately increased, and there is no need to consider the rotation problem of the swing arm between the magnet cavity and the switch to reduce the thickness of the swing arm, thereby enhancing the swing arm's touch and press force on the switch;

[0036] 3. When the ambient water level of the automatic water level control switch rises to the preset start-up water level, the opening and closing mechanism drives the automatic water level control switch to open, and the submersible pump starts to work. When the ambient water level of the automatic water level control switch rises to the preset stop water level, the submersible pump is in a closed state; the pressure control mechanism controls the air pressure in the automatic water level control switch so that the ambient water level of the opening and closing mechanism rises with the rise of the ambient water level of the automatic water level control switch. However, when the ambient water level of the automatic water level control switch drops, the ambient water level of the opening and closing mechanism maintains the position that enables the submersible pump to start. When the ambient water level of the automatic water level control switch is at the preset low point, the ambient water level of the opening and closing mechanism begins to drop, and then the submersible pump stops.

[0037] 4. When the float cavity is filled with water, the magnetic head on the float switch is connected to the magnetic head on the swing arm, and the ambient water level of the water level automatic control switch gradually decreases. When the ambient water level of the water level automatic control switch drops to the end of the air inlet channel, the gas enters the float cavity from the air inlet channel, and the ambient water level of the float gradually decreases. After the gas enters the float cavity, the magnetic head on the float switch continues to be connected to the magnetic head on the swing arm for a period of time, so that the submersible pump can continue to work for a period of time, thereby making the submersible pump have a lower shutdown water level, which can be as low as 1mm. After the magnetic head on the float switch is separated from the magnetic head on the swing arm, the submersible pump stops, and the liquid in the float cavity gradually drops below the shutdown water level due to the principle of communicating vessels. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a cross-sectional view of the automatic water level control switch in this embodiment;

[0039] Figure 2 is a cross-sectional view of the automatic water level control switch in this embodiment;

[0040] Figure 3Schematic diagram of the magnetic properties of the magnetic suction head in this embodiment;

[0041] Figure 4 It is a cross-sectional view of the automatic water level control switch in this embodiment.

[0042] Figure numerals: 1. switch; 2. swing arm; 3. lifting rod; 4. float; 5. magnetic head; 6. magnet cavity; 7. No. 2 magnet; 8. No. 1 magnet; 9. No. 3 magnet; 10. switch body; 11. pressure control mechanism; 12. opening and closing mechanism; 13. switch cavity; 14. first cavity; 15. second cavity; 16. float cavity; 17. air inlet channel; 18. one-way valve; 19. switch air inlet; 20. switch water inlet; 21. protrusion. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-4 This application is described in further detail.

[0044] Example 1

[0045] The embodiment of the present application discloses an opening and closing mechanism 12 for an automatic water level control switch.

[0046] Reference Figure 1 , Figure 2 and Figure 3 , including a switch 1, a swing arm 2, a lifting rod 3, a float 4 and a magnet cavity 6, the lifting rod 3 is glued to the upper side of the float 4, and a No. 2 magnet 7 is inserted on the upper side of the lifting rod 3. The float 4 is filled with a counterweight, so that when the lifting rod 3 and the No. 2 magnet 7 are located on the upper side of the float 4, the float 4 continues to keep the lifting rod 3 located at the top without tipping over, and the magnet cavity 6 separates the switch 1, the swing arm 2 and the lifting rod 3, the float 4, so that the No. 2 magnet 7 is located in the magnet cavity 6, and the No. 2 magnet 7 can float up and down along the direction of the magnet cavity 6, ensuring that part of the switch 1 will not contact the water, increasing the stability of the opening and closing mechanism 12, and thereby allowing the opening and closing mechanism 12 to be used normally in a variety of liquid environments.

[0047] The switch 1 can be connected to the swing arm 2, so that the swing arm 2 rotates to trigger the switch 1 to turn on. The lower end of the swing arm 2 is in an inverted "U" shape and is respectively plugged with a No. 1 magnet 8 and a No. 3 magnet 9. The No. 1 magnet 8 and the No. 3 magnet 9 are respectively installed on both sides of the outer wall of the magnet cavity 6, and the end of the No. 1 magnet 8 close to the No. 2 magnet 7 has the same magnetic property as the No. 2 magnet 7, and the end of the No. 3 magnet 9 close to the No. 2 magnet 7 has a different magnetic property from the No. 2 magnet 7. When the float 4 moves with the rise of the environmental water level, the lifting rod 3 connected to the float 4 and the No. 2 magnet 7 rise synchronously. When the No. 2 magnet 7 rises between the No. 1 magnet 8 and the No. 3 magnet 9, due to the principle of like poles repelling and unlike poles attracting, the No. 1 magnet 8 and the No. 3 magnet 9 are moved upward and downward. 9 interacts with the second magnet 7, so that the swing arm 2 starts to rotate, and then the swing arm 2 triggers the switch 1 to turn on, and then the submersible pump starts to work. After the submersible pump is started to work, the environmental water level of the submersible pump will continue to drop. When the environmental water level of the float 4 also starts to drop, the second magnet 7 moves away from the first magnet and the third magnet 9 with the float 4, and then the swing arm 2 is reset. The reset of the swing arm 2 resets the switch 1, and then the submersible pump is in the shutdown position, wherein the submersible pump environmental water level that makes the second magnet 7 between the first magnet 8 and the third magnet 9 is called the startup water level; the submersible pump environmental water level that makes the second magnet 7 away from the first magnet 8 and the third magnet 9 is called the shutdown water level.

[0048] Furthermore, in the present embodiment, the end of the No. 1 magnet 8 close to the No. 2 magnet 7 has a different magnetic property from the No. 2 magnet 7, and the end of the No. 3 magnet 9 close to the No. 2 magnet 7 has the same magnetic property as the No. 2 magnet 7; the position of the No. 1 magnet 8 and the No. 3 magnet 9 can be interchanged as long as the swing arm 2 can move stably.

[0049] Furthermore, in this embodiment, only the No. 1 magnet 8 is inserted into the lower end of the swing arm 2, so that when the No. 2 magnet 7 is moved into the No. 1 magnet 8, the No. 1 magnet 8 itself can also drive the swing arm 2 to move, thereby triggering the switch 1 to move.

[0050] Example 2

[0051] The embodiment of the present application discloses an opening and closing mechanism 12 for an automatic water level control switch.

[0052] refer to Figure 4, including a switch 1, a swing arm 2, a lifting rod 3, a float 4 and a magnet cavity 6, the lifting rod 3 is glued to the upper side of the float 4, a No. 2 magnet 7 is inserted on the upper side of the lifting rod 3, the magnet cavity 6 separates the switch 1, the swing arm 2 and the lifting rod 3, the float 4, so that the No. 2 magnet 7 is located in the magnet cavity 6, and the No. 2 magnet 7 can float up and down along the direction of the float 4 along the magnet cavity 6, the swing arm 2 is arranged perpendicular to the direction of the lifting rod 3, the swing arm 2 is "U" shaped, one end of the "U" shaped swing arm 2 is rotatably connected to the switch body 10, and the other end of the swing arm 2 is "U" shaped around the outer wall of the magnet cavity 6, the swing arm 2 can contact with the switch 1, so that the swing arm 2 can press the switch 1 to start the submersible pump when it rotates, and the magnet cavity 6 There are no other devices between the magnet cavity 6 and the switch 1, so that the magnet cavity 6 and the switch 1 can be set in close proximity, and there is no need to deliberately leave a gap between the magnet cavity 6 and the switch 1, so that the space volume occupied by the magnet cavity 6, the switch 1 and the swing arm 2 is reduced. By reducing the part of the swing arm 2 between the switch 1 and the magnet cavity 6, the layout of the switch 1, the swing arm 2 and the magnet cavity 6 is optimized. Since the swing arm 2 is "U"-shaped and surrounds the outer wall of the magnet cavity 6, the thickness of the contact surface between the swing arm 2 and the switch 1 can be appropriately increased, and there is no need to consider the rotation problem of the swing arm 2 between the magnet cavity 6 and the switch 1 and reduce the thickness of the swing arm 2, thereby enhancing the pressing force of the button on the switch 1 by the swing arm 2.

[0053] The two sides of the "U"-shaped swing arm 2 are clearly connected with the No. 1 magnet 8 and the No. 3 magnet 9, so that when the No. 2 magnet 7 rises along the magnet cavity 6 to the start-up water level, the No. 2 magnet 7 is just located between the No. 1 magnet 8 and the No. 3 magnet 9. Due to the principle that like poles repel and unlike poles attract, the No. 1 magnet 8, the No. 3 magnet 9 and the No. 2 magnet 7 interact with each other, so that the swing arm 2 starts to rotate, and then the swing arm 2 triggers the switch 1 to turn on. Similarly, when the No. 2 magnet 7 moves away from the No. 1 magnet 8 and the No. 3 magnet 9 along the magnet cavity 6, the swing arm 2 is reset, and the swing arm 2 stops pressing the switch 1, so that the switch 1 is in the closed state.

[0054] Furthermore, in the present embodiment, the end of the No. 1 magnet 8 close to the No. 2 magnet 7 has a different magnetic property from the No. 2 magnet 7, and the end of the No. 3 magnet 9 close to the No. 2 magnet 7 has the same magnetic property as the No. 2 magnet 7; the position of the No. 1 magnet 8 and the No. 3 magnet 9 can be interchanged as long as the swing arm 2 can move stably.

[0055] Furthermore, in this embodiment, only the No. 1 magnet 8 is inserted into the lower end of the swing arm 2, so that when the No. 2 magnet 7 is moved into the No. 1 magnet 8, the No. 1 magnet 8 itself can also drive the swing arm 2 to move, thereby triggering the switch 1 to move.

[0056] Furthermore, in the present embodiment, a bracket may be provided between the swing arm 2 and the switch body 10, so that the switch body 10 is connected to the swing arm 2 through the bracket, and the switch body 10 can be installed with the swing arm 2 of different heights through the bracket, thereby adjusting the strength and position of the magnet action between the swing arm 2 and the lifting rod 3, thereby increasing the universal applicability of the water level control switch 1, and the bracket also allows the installation position of the swing arm 2 to have a greater degree of freedom.

[0057] Example 3

[0058] The embodiment of the present application discloses an automatic water level control switch.

[0059] Reference Figure 1 and Figure 2 , including a switch body 10, an opening and closing mechanism 12 and a pressure control mechanism 11. A switch cavity 13 is provided in the switch body 10. The switch cavity 13 has a switch water inlet 20. The opening and closing mechanism 12 is arranged in the switch cavity 13. The pressure control mechanism 11 is arranged on the switch body 10. The opening and closing mechanism 12 opens and closes the water level automatic control switch according to the height of the environmental water level in the switch cavity 13. When the environmental water level of the water level automatic control switch reaches the start-up water level, the water level automatic control switch is in the open state. When the environmental water level of the water level automatic control switch reaches the start-up water level, the water level automatic control switch is in the open state. When the water level reaches the shutdown water level, the automatic water level control switch is in the closed state; the pressure control mechanism 11 controls the gas pressure in the switch cavity 13 to raise and lower the ambient water level in the switch cavity 13, so that the water level in the switch cavity 13 rises with the rise of the ambient water level of the automatic water level switch, and after the ambient water level of the automatic water level switch drops to the shutdown water level, the water level in the switch cavity 13 drops with the ambient water level of the automatic water level switch, thereby making the opening and closing mechanism 12 use the water level in the switch cavity 13 to close the automatic water level control switch.

[0060] The switch cavity 13 includes a first cavity 14 and a second cavity 15. The first cavity 14 is located at the upper part of the switch body 10, and the second cavity 15 is located at the lower part of the switch body 10. The second cavity 15 includes a float cavity 16 and a magnet cavity 6. The opening and closing mechanism 12 includes a switch 1, a swing arm 2, a lifting rod 3 and a float 4. The switch 1 and the swing arm 2 are arranged in the first cavity 14. The swing arm is rotatably connected to the switch body. The swing arm 2 rotates to trigger the switch 1 to open. The lower end of the swing arm 2 is in an inverted "U" shape and is respectively plugged with a No. 1 magnet 8 and a No. 3 magnet 9. The No. 1 magnet 8 and the No. 3 magnet 9 are respectively installed on the outer wall of the magnet cavity 6 On both sides, the float 4 is located in the float cavity 16, the lifting rod 3 is glued to the upper side of the float 4, and the upper side of the glued rod is plugged with the No. 2 magnet 7, and the No. 2 magnet 7 is located in the magnet cavity 6, so that the end of the No. 1 magnet 8 close to the No. 2 magnet 7 has the same magnetic property as the No. 2 magnet 7, and the end of the No. 3 magnet 9 close to the No. 2 magnet 7 has a different magnetic property from the No. 2 magnet 7, and the float 4 is filled with a counterweight, so that when the lifting rod 3 and the No. 2 magnet 7 are located on the upper side of the float 4, the float 4 continues to keep the lifting rod 3 at the top without tipping over, and the float 4 floats up and down along the float cavity 16, and the No. 2 magnet 7 floats up and down along the magnet cavity 6.

[0061] When the environmental water level in the switch cavity 13 rises, the float 4 in the switch cavity 13 rises accordingly. The rise of the float 4 drives the No. 2 magnet 7 connected thereto, so that the No. 2 magnet 7 can rise between the No. 1 magnet 8 and the No. 3 magnet 9, and the end of the No. 1 magnet 8 close to the No. 2 magnet 7 has the same magnetic property as the No. 2 magnet 7, and the end of the No. 3 magnet 9 close to the No. 2 magnet has a different magnetic property from the No. 2 magnet 7. Then, due to the principle that like poles repel and unlike poles attract, the swing arm 2 starts to rotate due to the action of the No. 1 magnet 8, the No. 3 magnet 9 and the No. 2 magnet 7, so that the swing arm 2 triggers the switch 1 to turn on, so that the water level automatic control switch is in the on state, so that the submersible pump is started to work. After the submersible pump is started to work, the environmental water level of the water level automatic control switch will continue to drop. Similarly, when the environmental water level of the float 4 also starts to drop, the No. 2 magnet 7 moves away from the No. 1 magnet and the No. 3 magnet 9 along with the float 4, so that the swing arm 2 is reset. The reset of the swing arm 2 resets the switch 1, so that the submersible pump is in the shutdown position.

[0062] The pressure control mechanism 11 includes an air inlet channel 17 and a one-way valve 18. The air inlet channel 17 is integrally connected to the switch body 10, so that the gas channel is connected to the upper wall of the float cavity 16. The air inlet channel 17 has a switch air inlet 19, and the switch air inlet 19 is located at the lower end of the air inlet channel 17, so that the switch air inlet 19 can be water-sealed as the water level automatically controls the switch environment water level to rise. The one-way valve 18 is located on the upper side of the air inlet channel 17. The one-way valve 18 and the switch air inlet 19 do not affect each other. The one-way valve 18 connects the air inlet channel 17 with the external environment, so that the gas in the air inlet channel 17 can reach the external environment through the one-way valve 18, while the gas in the external environment cannot enter through the one-way valve 18.

[0063] When the ambient water level of the automatic water level control switch begins to rise, before the switch air inlet 19 is sealed by water, the switch air inlet 19 serves as the gas connection between the switch cavity 13 and the external environment. Due to the principle of communicating vessels, the water level in the switch cavity 13 rises with the rise of the ambient water level of the automatic water level control switch. After the switch air inlet 19 is sealed by the ambient water level of the automatic water level control switch, the switch cavity 13 discharges gas to the outside through the one-way valve 18, thereby reducing the air pressure in the switch cavity 13, and thereby the water level in the switch cavity 13 can still rise with the rise of the ambient water level of the automatic water level control switch, that is, the float 4 and the second magnet in the switch cavity 13 are moved along the float cavity. 16 and the magnet chamber 6 rise, and when the float 4 and the second magnet reach the preset start-up water level, the second magnet 7 is located between the first magnet 8 and the third magnet 9. Due to the principle of like poles repelling and opposite poles attracting, the swing arm 2 starts to rotate due to the action of the first magnet 8, the third magnet 9 and the second magnet 7, and then the swing arm 2 presses the switch 1, so that the water level automatic control switch is in the on state, and then the submersible pump is started to work. After the submersible pump is started to work, the ambient water level will continue to drop. At this time, due to the siphon principle, the gas content in the switch chamber 13 is small, and there is a pressure difference between the switch chamber 13 and the outside world, so that the ambient water level in the switch chamber 13 is still maintained at the start-up water level;

[0064] When the ambient water level of the automatic water level control switch is lower than the switch air inlet 19, due to the principle of communicating vessels, gas begins to slowly enter the switch cavity 13, and the ambient water level of the float 4 gradually drops. After the gas enters the float cavity 16, the magnetic head 5 on the float 4 switch continues to be connected with the magnetic head 5 on the swing arm 2 for a period of time, so that the submersible pump can continue to work for a period of time, thereby making the submersible pump have a lower shutdown water level, which can be as low as 1 mm. After the magnetic head 5 on the float 4 switch is separated from the magnetic head 5 on the swing arm 2, the submersible pump stops, and the liquid in the float cavity 16 gradually drops below the shutdown water level due to the principle of communicating vessels.

[0065] Since the opening and closing mechanism 12 and the pressure control mechanism 11 of the automatic water level control switch are both mechanical structures, their operation is not affected by water quality, the function is more stable, and compared with the electronic sensing structure, the cost of the automatic water level control switch is lower. In addition, since the switch 1 and the swing arm 2 are distributed in the up and down directions, and the lifting rod 3 and the float 4 are distributed in the up and down directions, the automatic water level control switch can be used in a narrow space through vertical water level control.

[0066] Furthermore, in this embodiment, the swing arm 2 can be arranged perpendicular to the lifting rod 3. Since the float 4 itself has a certain volume and is usually flat, and the switch 1 and the swing arm 2 are distributed in the vertical direction, and the lifting rod 3 and the float 4 are distributed in the vertical direction, the swing arm 2 can be arranged perpendicular to the lifting rod 3, which is beneficial to lowering the height of the automatic water level control switch. Through the flat float 4, the flat swing arm 2 and the switch 1, the automatic water level control switch is rectangular as a whole, more regular, and more tightly arranged.

[0067] Further, in this embodiment, reference Figure 4 The swing arm 2 can also adopt a "U" shape, so that one end of the "U"-shaped swing arm 2 is rotatably connected to the switch body 10, so that the swing arm 2 rotates to press the switch 1 to start the submersible pump, and the other end of the swing arm 2 is "U"-shaped around the outer wall of the magnet cavity 6, so that there are no other devices between the magnet cavity 6 and the switch 1, reducing the distance problem of device spacing, which is beneficial to reducing the overall volume of the water level automatic control switch, and the swing arm 2 does not need to consider the thickness of the swing arm 2 when rotating between the switch 1 and the magnet cavity, so that the thickness of the swing arm 2 has greater freedom.

[0068] Furthermore, in the present embodiment, the one-way valve 18 comprises a one-way valve channel, a spring, a plug and a threaded seat, one end of the spring is connected to the threaded seat, and the other end is connected to the plug, the one-way valve channel is trapezoidal, so that the diameter of the one-way valve 18 close to the outside world is larger than the diameter of the one-way valve 18 away from the outside world, the plug and the spring seat are placed in the one-way valve channel, and the plug blocks the diameter of the one-way valve 18 away from the outside world, the threaded seat is threadedly connected to the outer wall of the one-way valve channel, so that the spring and the plug are fixed in the one-way valve channel, when the outside pressure wants to enter the second cavity from the one-way valve 18, the pressure of the outside gas will only squeeze the plug closer and closer to the end of the one-way valve channel with a smaller diameter, thereby maintaining the sealed state of the one-way valve 18, when the gas in the second cavity wants to reach the outside world, the gas in the second cavity squeezes the plug away from the end of the one-way valve channel with a smaller diameter, so that the plug is located in the part with a larger diameter of the one-way valve channel, thereby making a gap between the plug and the one-way valve channel, so that the gas in the second cavity can reach the outside world.

[0069] Furthermore, in this embodiment, the one-way valve 18 can also be in the form of a combination of a one-way valve channel and a diaphragm, the inner wall of the one-way valve channel is provided with a one-way valve inner protrusion, and the lower end of the diaphragm is integrally connected with a connecting piece for connecting to the one-way valve inner protrusion, the diaphragm is placed on the upper side of the one-way valve channel, and is in a state of being hooked to the one-way valve inner protrusion through the connecting piece, so that after the one-way valve 18 moves partially upward, the connecting piece of the diaphragm is hooked to the one-way valve inner protrusion of the one-way valve channel, so that when outside air wants to enter the one-way valve 18, the outside air will only squeeze the diaphragm to cover the surface of the one-way valve channel, thereby preventing outside air from entering the one-way valve 18, and when the gas in the second cavity wants to reach the outside through the one-way valve 18, the air pressure in the second cavity drives the diaphragm to move upward, thereby allowing the gas in the second cavity to overflow, and after the gas in the second cavity stops overflowing, the diaphragm is reset due to gravity, so that the one-way valve 18 is in a sealed state; the diaphragm can also be reset under the elastic action of a spring.

[0070] Furthermore, in this embodiment, the one-way valve channel and the rubber sheet can be combined in a form, and the lower end of the rubber sheet is integrally connected with a connecting piece for connecting to the inner protrusion of the one-way valve. The rubber sheet is placed on the upper side of the one-way valve channel, so that the rubber sheet covers the one-way valve channel and is hooked with the inner protrusion of the one-way valve through the connecting piece. When outside air wants to enter the one-way valve 18, the outside air will only squeeze the rubber sheet covering the surface of the one-way valve channel, so that the one-way valve channel is more tightly sealed by the rubber sheet. When the gas in the second cavity 10 wants to reach the outside through the one-way valve 18, the air pressure in the second cavity 15 drives the rubber sheet to deform, so that the rubber sheet deforms upward with a gap, thereby allowing the gas in the second cavity 15 to overflow. After the gas in the second cavity 15 stops overflowing, the rubber sheet returns to its original position to seal the one-way valve channel.

[0071] Furthermore, in this embodiment, the one-way valve 18 may also adopt other mechanical or electronic structures, so that the gas in the second cavity can be discharged to the outside, while the outside gas cannot enter the second cavity.

[0072] Furthermore, in the present embodiment, the opening and closing mechanism 12 may also adopt other structures, as long as the opening and closing mechanism 12 can change the opening and closing state according to the ambient water level in the switch cavity 13 .

[0073] Furthermore, in this embodiment, the swing arm 2 can be rotated by having one end of the No. 1 magnet 8 close to the No. 2 magnet 7 have a different magnetic property from the No. 2 magnet 7, and one end of the No. 3 magnet 9 close to the No. 2 magnet 7 have the same magnetic property as the No. 2 magnet 7, thereby driving the magnet assembly to turn on the switch 1.

[0074] Furthermore, in this embodiment, the position of the No. 1 magnet and the No. 3 magnet 9 can be interchanged.

[0075] Furthermore, in this embodiment, the pressure control mechanism 11 can also control the air pressure in the switch cavity 13 through an air pump, an electrically opened and closed air inlet, etc., thereby controlling the water level in the switch cavity 13.

[0076] Furthermore, in this embodiment, a protrusion 21 is integrally connected to the upper side of the float cavity 16, so that when the float 4 rises to the upper wall of the float cavity 16, the float 4 will not be unable to float up and down with the water level due to the force between it and the upper wall of the float cavity 16.

[0077] The implementation principle of an automatic water level control switch disclosed in an embodiment of the present application is as follows: an opening and closing mechanism 12 uses the position of the ambient water level in a switch cavity 13 to automatically open and close the automatic water level control switch, so that after the ambient water level in the switch cavity 13 rises to the startup water level, the automatic water level control switch is automatically in the open state, and after the ambient water level in the switch cavity 13 drops to the shutdown water level, the automatic water level control switch is automatically in the closed state, and the pressure control mechanism 11 automatically controls the gas capacity in the switch cavity 13, so that the water level in the switch cavity 13 rises as the ambient water level of the automatic water level switch rises, and after the ambient water level of the automatic water level switch drops to the shutdown water level, the water level in the switch cavity 13 drops as the ambient water level of the automatic water level switch drops, thereby enabling the automatic water level control switch to have the effect of automatically controlling the opening and closing according to the ambient water level.

[0078] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An opening and closing mechanism for an automatic water level control switch, characterized in that: The invention comprises a switch (1), a swing arm (2), and a float (4) provided with a lifting rod (3); the swing arm (2) can be connected to the switch (1), and the switch (1) and the swing arm (2) are distributed in a vertical direction; the lifting rod (3) and the float (4) are distributed in a vertical direction; a magnetic suction head (5) is provided on the swing arm (2), and a magnetic suction head (5) is also provided on the lifting rod (3).

2. The opening and closing mechanism according to claim 1, characterized in that: It also includes a magnet cavity (6), the magnetic head (5) on the lifting rod (3) is located in the magnet cavity (6), the swing arm (2) and the magnetic head (5) on the swing arm (2) are located outside the magnet cavity (6), and the magnet cavity (6) separates the magnetic head (5) on the swing arm (2) and the magnetic head (5) on the lifting rod (3).

3. The opening and closing mechanism according to claim 1, characterized in that: The magnetic head (5) on the lifting rod (3) is called the second magnet (7), and the magnetic head (5) on the swing arm (2) is called the first magnet (8), so that when the second magnet (7) approaches the first magnet (8), the magnetic heads (5) interact with each other to drive the swing arm (2) to move.

4. The opening and closing mechanism according to claim 1, characterized in that: The magnetic head (5) on the lifting rod (3) is called the second magnet (7), and the magnetic head (5) on the swing arm (2) can be divided into two parts, respectively called the first magnet (8) and the third magnet (9), and the first magnet (8) and the third magnet (9) are respectively located on both sides of the rising path of the second magnet (7).

5. The opening and closing mechanism according to claim 4, characterized in that: The end of the No. 1 magnet (8) close to the No. 2 magnet (7) has the same magnetic properties as the No. 2 magnet (7), and the end of the No. 3 magnet (9) close to the No. 2 magnet (7) has a different magnetic property from the No. 2 magnet (7); the end of the No. 1 magnet (8) close to the No. 2 magnet (7) has a different magnetic property from the No. 2 magnet (7), and the end of the No. 3 magnet (9) close to the No. 2 magnet (7) has the same magnetic properties as the No. 2 magnet (7); the No. 1 magnet (8) and the No. 3 magnet (9) can be interchanged in position.

6. The opening and closing mechanism according to claim 4, characterized in that: The swing arm (2) is U-shaped.

7. The opening and closing mechanism according to claim 1, characterized in that: The swing arm (2) and the lifting rod (3) are arranged vertically.

8. A water level automatic control switch, characterized in that: The invention comprises a switch body (10), a pressure control mechanism (11) and an opening and closing mechanism (12); the opening and closing mechanism (12) is arranged on the switch body (10); the pressure control mechanism (11) is arranged on the switch body (10); the opening and closing mechanism (12) may be the opening and closing mechanism (12) according to any one of claims 1 to 7.

9. The automatic water level control switch according to claim 8, characterized in that: The switch body (10) is provided with a switch cavity (13), the switch cavity (13) comprising a first cavity (14) and a second cavity (15), the second cavity (15) comprising a float cavity (16) and a magnet cavity (6), and the float cavity (16) is connected to the magnet cavity (6).

10. The automatic water level control switch according to claim 9, characterized in that: The pressure control mechanism (11) comprises an air intake channel (17) and a one-way valve (18); one end of the air intake channel (17) is connected to the upper side of the float chamber (16), and the other end is connected to the outside; the one-way valve (18) is arranged on the air intake channel (17).

11. The automatic water level control switch according to claim 10, characterized in that: The air inlet channel (17) has a switch air inlet (19), the second cavity (15) has a switch water inlet (20), and the horizontal plane at the position of the switch air inlet (19) is higher than the horizontal plane at the position of the switch water inlet (20).

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