Anti-vibration liquid level switch

Abstract

The utility model discloses an anti-vibration liquid level switch comprising a liquid level rod; the limiting piece is arranged on the liquid level rod; the floater is provided with a through hole which is sleeved on the liquid level rod; the device further comprises a variable-diameter limiting part, the variable-diameter limiting part comprises a first variable-diameter part arranged on the liquid level rod and / or a second variable-diameter part arranged on the limiting piece, the diameter of the maximum position of the first variable-diameter part is larger than the hole diameter of the through hole, and the diameter of the maximum position of the second variable-diameter part is larger than the hole diameter of the through hole. The anti-vibration device is novel in structure, good in anti-vibration effect, low in operation noise and high in practicability.

Description

Technical Field

[0001] This utility model belongs to the field of liquid level switch technology, and in particular relates to a vibration-proof liquid level switch. Background Technology

[0002] A level switch is typically installed on the pump casing of an air conditioner drain pump. The float contacts the liquid surface in the air conditioner's water collection tank. As the liquid level rises and falls, the float moves axially along the level rod, causing the magnetic ring and sensing element to pair and disengage, thus sending a signal to start or stop the drain pump.

[0003] To allow the float to slide freely on the level bar, the inner diameter of the float must be larger than the diameter of the level bar, resulting in a certain gap between the inner diameter of the float and the outer wall of the level bar. When the drain pump is working or the air conditioner is running, the resulting vibration is transmitted to the level bar, causing the float to vibrate and collide with the level bar, generating considerable noise.

[0004] Existing patent document (publication number: CN220400492U) discloses "a float-type liquid level switch", the technical solution of which is that at least one end of the support is fitted with a shockproof sleeve, which reduces the vibration and collision amplitude between the float and the support. The installation and subsequent replacement of the shockproof sleeve require step-by-step operation, which is inconvenient. Summary of the Invention

[0005] The purpose of this utility model is to solve the above-mentioned technical problems existing in the prior art and to provide a vibration-proof liquid level switch with novel structure, good vibration-proof effect, low operating noise and strong practicality.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A vibration-damping liquid level switch includes: a liquid level rod; a limiting plate disposed on the liquid level rod; and a float with a through hole fitted onto the liquid level rod. The switch is characterized by further including a variable diameter limiting part, which comprises a first variable diameter part disposed on the liquid level rod and / or a second variable diameter part disposed on the limiting plate. The maximum diameter of the first variable diameter part is larger than the diameter of the through hole, and the maximum diameter of the second variable diameter part is larger than the diameter of the through hole. This liquid level switch features a novel structure, good vibration damping effect, low operating noise, and strong practicality.

[0008] Furthermore, the first diameter-changing section and the level rod are integrally molded. This allows for rapid prototyping, good consistency, structural stability, and reliable use. The first diameter-changing section and the level rod are made of the same material, making them pressure-resistant, impact-resistant, and not easily deformed, resulting in a long service life. Compared to existing technologies, there is no need to install a separate shockproof sleeve or replace it later, making it a one-step solution that is convenient and hassle-free.

[0009] Furthermore, the first variable diameter section divides the level rod into a first rod body and a second rod body. The first variable diameter section is located between the first rod body and the second rod body. The diameter of the first rod body is smaller than the diameter of the second rod body, and the float is fitted onto the first rod body. The structure is stable, there are no seams, and the quality is reliable.

[0010] Furthermore, the second diameter-changing section and the limiting plate are integrally molded. This allows for rapid prototyping, good consistency, structural stability, and reliable use. The second diameter-changing section and the limiting plate are made of the same material, making them pressure-resistant, impact-resistant, and not easily deformed, resulting in a long service life. Compared to existing technologies, there is no need to install a separate shockproof sleeve, and subsequent replacement is convenient, providing a one-step solution that is worry-free and convenient.

[0011] Furthermore, the diameter of the variable-diameter limiting part gradually decreases from one end to the other along its axial direction, forming a guide cone surface. This guides the rise and fall of the float, reducing the probability that the float end will be blocked by the end face of the variable-diameter limiting part during the rise and fall of the float.

[0012] Furthermore, the axial length of the variable diameter limiting part is less than the axial length of the float. While providing support for the float, the variable diameter limiting part can reduce the mating surface between its outer surface and the inner wall of the through hole, thereby reducing the obstruction effect on liquid formation.

[0013] Furthermore, the limiting plate has an open structure, and the liquid level rod has a limiting groove corresponding to the limiting plate, so that the liquid level rod can be detachably connected to the limiting plate. The limiting plate is detachable and replaceable, and can be installed and used as needed, which is flexible and convenient. During installation, the limiting plate is pried open outward, and then the limiting plate is inserted into the limiting groove. After releasing, the limiting plate cannot freely fall out of the limiting groove, thus achieving limiting and fixing on the liquid level rod.

[0014] Furthermore, the level rod has axial protrusions distributed circumferentially. On the one hand, the axial protrusions work with the limiting plate to restrict the range of motion of the float on the level rod, and on the other hand, they improve the structural strength of the level rod, making it less prone to deformation and extending its service life.

[0015] Furthermore, the axial protrusion and the liquid level rod are integrally molded. This allows for rapid molding, good consistency, structural stability, and reliable use.

[0016] Furthermore, the liquid level rod is equipped with a mounting bracket, which is used to fix the liquid level rod to the air conditioning drain pump, making installation convenient.

[0017] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0018] 1. During use, when the float is at the upper end of the liquid level rod, it is sleeved on the first variable diameter part; when the float is at the lower end of the liquid level rod, it is sleeved on the second variable diameter part. This reduces the gap between the inner wall of the through hole and the outer wall of the liquid level rod, thereby reducing the vibration and collision amplitude between the float and the liquid level rod, and thus reducing noise. Both the upper and lower ends have a shock-absorbing effect. It can be adapted to both upright and inverted installation of air conditioning drain pumps, and has strong adaptability.

[0019] 2. The first diameter reducing part and the liquid level rod are integrally molded, which can be quickly formed, has good consistency, stable structure, and reliable use. The first diameter reducing part and the liquid level rod are made of the same material, which is pressure-resistant, impact-resistant, not easy to deform, and has a long service life. Compared with the existing technology, there is no need to install a separate anti-vibration sleeve or replace it later. It is a one-step solution that is worry-free and convenient.

[0020] 3. The second diameter changing part and the limiting piece are integrally molded, which can be quickly formed, has good consistency, stable structure, and reliable use. The second diameter changing part and the limiting piece are made of the same material, which is pressure-resistant, impact-resistant, not easy to deform, and has a long service life. Compared with the existing technology, there is no need to install a separate shockproof sleeve, and subsequent replacement is also convenient. It is a one-step solution that is worry-free and convenient. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0023] Figure 2 This is a schematic diagram of the connection between the float and the first variable diameter section in Embodiment 1;

[0024] Figure 3 This is a structural schematic diagram of Embodiment 2 of the present invention;

[0025] Figure 4 This is a schematic diagram of the connection between the float and the second diameter variable section in Embodiment 2;

[0026] Figure 5 This is an enlarged schematic diagram of the connection between the float and the second variable diameter section in Embodiment 2;

[0027] Figure 6 This is a structural schematic diagram of Embodiment 3 of the present invention;

[0028] Figure 7 This is a schematic diagram of the connection between the float and the second variable diameter section in Embodiment 3.

[0029] In the figure: 1-liquid level rod; 2-float; 3-limiting plate; 4-through hole; 5-mounting part; 6-limiting groove; 7-first diameter changing part; 8-first rod body; 9-second rod body; 10-axial protrusion; 11-second diameter changing part. Detailed Implementation

[0030] like Figure 1 and Figure 2 The image shown is an embodiment of this utility model.

[0031] A vibration-damping liquid level switch includes: a liquid level rod 1, a float 2, a limiting plate 3, and a variable diameter limiting part. The float 2 has a through hole 4 and is fitted onto the liquid level rod 1. A sensing element is encapsulated inside the liquid level rod 1. A magnetic ring that cooperates with the sensing element is embedded inside the float 2 to monitor changes in liquid level. This is prior art and will not be described in detail here.

[0032] The liquid level rod 1 is equipped with a mounting part 5. The mounting part 5 can be an elastic buckle, which can be fastened into the positioning hole on the air conditioner drain pump to achieve fixation and facilitate installation. Alternatively, the mounting part 5 can be a mounting block with mounting holes, which can be nailed through the mounting holes to fix the mounting block on the air conditioner drain pump to achieve fixation and facilitate installation.

[0033] The limiting piece 3 has an open structure, and the liquid level rod 1 is provided with a limiting groove 6 corresponding to the limiting piece 3. The limiting piece 3 is detachable and replaceable, and can be installed and used as needed, which is flexible and convenient. When installing, pry the limiting piece 3 outward, and then insert the limiting piece 3 into the limiting groove 6. After releasing, the limiting piece 3 cannot freely come out of the limiting groove 6, thus achieving limiting and fixing on the liquid level rod 1.

[0034] The variable diameter limiting part is a first variable diameter part 7 provided on the liquid level rod 1, and the maximum diameter of the first variable diameter part 7 is larger than the diameter of the through hole 4.

[0035] During use, the float 2 is fitted onto the first variable diameter part 7, which reduces the gap between the inner wall of the through hole 4 and the outer wall of the liquid level rod 1, thereby reducing the vibration and collision amplitude between the float 2 and the liquid level rod 1, and thus reducing noise.

[0036] The first variable diameter section 7 divides the liquid level rod 1 into a first rod body 8 and a second rod body 9. The diameter of the first rod body 8 is smaller than the diameter of the second rod body 9. The float 2 is fitted onto the first rod body 8. The first variable diameter section 7 is located between the first rod body 8 and the second rod body 9. The first variable diameter section 7, the first rod body 8, and the second rod body 9 are integrally formed.

[0037] Rapid prototyping ensures good consistency, stable structure, no seams, and reliable quality. The first diameter-changing part 7 and the liquid level rod 1 are made of the same material, making them pressure-resistant, impact-resistant, not easily deformed, and with a long service life. Compared with existing technologies, there is no need to install a separate anti-vibration sleeve or replace it later. It is a one-step solution that is worry-free and convenient.

[0038] The diameter of the first variable diameter section 7 gradually decreases from one end to the other along its axial direction, forming a guide cone surface, which guides the rise and fall of the float 2 and reduces the probability that the end of the float 2 will be blocked by the end face of the first variable diameter section 7 when the float 2 rises and falls.

[0039] The axial length of the first variable diameter section 7 is less than the axial length of the float 2. While supporting the float 2, the first variable diameter section 7 can reduce the mating surface between the outer surface of the first variable diameter section 7 and the inner wall of the through hole 4, thereby reducing the obstruction effect of liquid formation.

[0040] The second rod body 9 has axially protruding ribs 10 distributed circumferentially. The axially protruding ribs 10, on the one hand, work with the limiting plate 3 to restrict the range of motion of the float 2 on the liquid level rod 1, and on the other hand, improve the structural strength of the liquid level rod 1, making it less prone to deformation and extending its service life. The axially protruding ribs 10 and the second rod body 9 are integrally formed, allowing for rapid molding, good consistency, structural stability, and reliable use.

[0041] like Figures 3 to 5 The image shown is a second embodiment of this utility model.

[0042] In the technical solution based on Embodiment 1, the structure of the variable diameter limiting part is different. The variable diameter limiting part is a second variable diameter part 11 provided on the limiting piece 3. The maximum diameter of the second variable diameter part 11 is larger than the diameter of the through hole 4.

[0043] During use, the float 2 is fitted onto the first variable diameter part 7, which reduces the gap between the inner wall of the through hole 4 and the outer wall of the liquid level rod 1, thereby reducing the vibration and collision amplitude between the float 2 and the liquid level rod 1, and thus reducing noise.

[0044] The second diameter changing part 11 and the limiting piece 3 are integrally formed, which can be quickly formed, has good consistency, stable structure, and reliable use. The second diameter changing part 11 and the limiting piece 3 are made of the same material, which is pressure-resistant, impact-resistant, not easy to deform, and has a long service life. Compared with the existing technology, there is no need to install a separate shockproof sleeve, and subsequent replacement is also convenient. It is a one-step solution that is worry-free and convenient.

[0045] The diameter of the second variable diameter section 11 gradually decreases from one end to the other along its axial direction, forming a guide cone surface, which guides the rise and fall of the float 2 and reduces the probability that the end of the float 2 will be blocked by the end face of the second variable diameter section 11 when the float 2 rises and falls.

[0046] The axial length of the second variable diameter section 11 is less than the axial length of the float 2. While supporting the float 2, the second variable diameter section 11 can reduce the mating surface between the outer surface of the second variable diameter section 11 and the inner wall of the through hole 4, thereby reducing the obstruction effect of liquid formation.

[0047] like Figure 6 and Figure 7 The image shown is Embodiment 3 of this utility model.

[0048] Based on the technical solutions of Embodiment 1 and Embodiment 2, the variable diameter limiting part includes a first variable diameter part 7 disposed on the liquid level rod 1 and a second variable diameter part 11 disposed on the limiting piece 3. The maximum diameter of the first variable diameter part 7 is greater than the diameter of the through hole 4, and the maximum diameter of the second variable diameter part 11 is greater than the diameter of the through hole 4.

[0049] During use, when the float 2 is at the upper end of the liquid level rod 1, it is fitted onto the first variable diameter part 7; when the float 2 is at the lower end of the liquid level rod 1, it is fitted onto the second variable diameter part 11. This reduces the gap between the inner wall of the through hole 4 and the outer wall of the liquid level rod 1, thereby reducing the vibration and collision amplitude between the float 2 and the liquid level rod 1, and thus reducing noise. Both the upper and lower ends have a shock-absorbing effect, and it can be adapted to both upright and inverted installation of air conditioning drain pumps, making it highly adaptable.

[0050] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A vibration-damping liquid level switch, comprising: Liquid level gauge; A limiting piece is disposed on the liquid level rod; A float, wherein the float is provided with a through hole and is fitted onto the liquid level rod; Its features are: It also includes a variable diameter limiting part, which includes a first variable diameter part disposed on the liquid level rod and / or a second variable diameter part disposed on the limiting piece. The maximum diameter of the first variable diameter part is greater than the diameter of the through hole, and the maximum diameter of the second variable diameter part is greater than the diameter of the through hole.

2. The vibration-damping liquid level switch according to claim 1, characterized in that: The first variable diameter section and the liquid level rod are integrally formed.

3. The vibration-damping liquid level switch according to claim 2, characterized in that: The first variable diameter section divides the liquid level rod into a first rod body and a second rod body. The first variable diameter section is located between the first rod body and the second rod body. The diameter of the first rod body is smaller than the diameter of the second rod body. The float is fitted onto the first rod body.

4. The vibration-damping liquid level switch according to claim 1, characterized in that: The second variable diameter part and the limiting piece are integrally formed.

5. The vibration-damping liquid level switch according to claim 1, characterized in that: The diameter of the variable diameter limiting part gradually decreases from one end to the other along its axial direction, forming a guide cone surface.

6. The vibration-damping liquid level switch according to claim 1, characterized in that: The axial length of the variable diameter limiting part is less than the axial length of the float.

7. The vibration-damping liquid level switch according to claim 1, characterized in that: The limiting plate has an open structure, and the liquid level rod is provided with a limiting groove corresponding to the limiting plate, so that the liquid level rod can be detachably connected to the limiting plate.

8. The vibration-damping liquid level switch according to claim 1, characterized in that: The liquid level rod has axial protrusions distributed circumferentially, which are used to cooperate with the limiting plate to restrict the range of motion of the float.

9. A vibration-damping liquid level switch according to claim 8, characterized in that: The axial protrusion and the liquid level rod are integrally formed.

10. A vibration-damping liquid level switch according to claim 1, characterized in that: The liquid level rod is equipped with a mounting component, which is used to fix the liquid level rod to the air conditioning drain pump.

Images