Anti-floater rotation liquid level switch

Abstract

The utility model discloses a liquid level switch of anti -float self -rotation, include: liquid level rod, lower limit piece and float, liquid level rod has cylinder section, and the upper limit end face is formed between cylinder section and liquid level rod, and lower limit piece is located at the bottom of liquid level rod, and the float is sleeved on cylinder section through the sliding sleeve, and the float slides between the upper limit end face and lower limit piece, and the upper limit end face extends downward and forms the limited part, and the limited part is connected cylinder section, and the notch corresponding with the limited part is set up on the sliding sleeve, to limit the radial motion of the float. The utility model discloses novel structure, and the float is along cylinder section axial sliding through the sliding sleeve and does not occur radial motion, can avoid the collision of sliding sleeve and liquid level rod and produce the noise.

Description

Technical Field

[0001] This utility model belongs to the field of liquid level switch technology, and in particular relates to a liquid level switch that prevents the float from rotating. Background Technology

[0002] In air conditioners, level switches are usually installed on the side wall or bottom of the water tray, and are triggered by a float that moves with the water level.

[0003] The level gauge rod is usually cylindrical. In order for the float to slide freely on the level gauge rod, the diameter of the through hole of the float needs to be larger than the diameter of the level gauge rod. There is a large gap between the inner wall of the through hole of the float and the outer wall of the level gauge rod. During the up and down sliding process of the float, radial movement is likely to occur and it will collide with the level gauge rod, generating a lot of noise.

[0004] The existing patent document "A liquid level control switch" (publication number: CN206789491U) discloses that "a through hole is opened on the support sleeve to cooperate with the lower cylindrical section of the support, and the support sleeve is fitted onto the lower cylindrical section of the support and moves up and down on the lower cylindrical section", which also has the above-mentioned technical problem. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned technical problems in the prior art and to provide a level switch that prevents the float from rotating. The structure is novel, and the float slides axially along the cylindrical section through the sliding sleeve without radial movement, which can avoid the sliding sleeve from colliding with the level rod and generating noise.

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

[0007] A level switch to prevent float rotation includes:

[0008] A level rod, which has a cylindrical section, and an upper limit end face is formed between the cylindrical section and the level rod;

[0009] The lower limit component is located at the bottom of the liquid level rod;

[0010] The float is fitted onto the cylindrical section via a sliding sleeve, and slides between the upper limit end face and the lower limit component.

[0011] Its features include: an upper limit end extending downward to form a limiting part, which connects to a cylindrical section; and a notch on the sliding sleeve corresponding to the limiting part, to restrict the radial movement of the float. This novel liquid level switch structure allows the float to slide axially along the cylindrical section via the sliding sleeve without radial movement, thus preventing noise caused by collision between the sliding sleeve and the liquid level rod.

[0012] Furthermore, the float is equipped with a variable-diameter through groove, and the sliding sleeve is equipped with a bracket. The bracket engages with the variable-diameter through groove to allow the sliding sleeve to be detachably connected to the float. The float can be detached from the sliding sleeve for easy replacement and immediate use without removing the sliding sleeve, thus reducing maintenance difficulty.

[0013] Furthermore, the support includes a support portion, on which an upper blocking portion and an elastic hook portion are provided. The variable diameter through groove includes a first through groove and a second through groove. The first through groove is located above the second through groove, and the cross-sectional diameter of the second through groove is larger than that of the first through groove. The second through groove corresponds to the elastic hook portion. The elastic hook portion enters the second through groove from the first through groove. The upper blocking portion is located above the float, and the upper blocking portion cooperates with the elastic hook portion to restrict the free movement of the float.

[0014] Furthermore, the support unit is equipped with a guide section, and the float has a vertical guide groove corresponding to the guide section. Inserting the guide section into the vertical guide groove serves to guide the installation, reducing the difficulty of installation. After assembly, the float is less prone to lateral swaying and has high stability.

[0015] Furthermore, the bottom of the cylindrical section is provided with an end block, and the end block is provided with a transverse through hole. The transverse through hole is interference-fitted with the lower limit component and tightly connected, which improves the installation stability of the lower limit component.

[0016] Furthermore, the liquid level rod is connected to a mounting assembly, which includes a mounting plate and a sheet metal part. The mounting plate is positioned on the liquid level rod, and the sheet metal part is snapped onto the mounting plate. The mounting plate has an elastic block with an outward protrusion, and the sheet metal part has a limiting hole corresponding to the outward protrusion. The mounting plate can be disassembled and separated from the sheet metal part, simplifying assembly and replacing bolt connections for easier and more convenient operation.

[0017] Furthermore, the mounting plate has symmetrically distributed slots corresponding to the horizontal sections of the sheet metal parts. The horizontal sections of the sheet metal parts are in close contact with the inner walls of the slots, resulting in high friction. This makes it difficult for the sheet metal parts and the mounting plate to move relative to each other, thus ensuring high assembly stability.

[0018] Furthermore, the sheet metal part is provided with a mounting part, which has a mounting through hole. A nail is inserted into the mounting through hole to facilitate fixing the sheet metal part to the designated mounting position, making installation convenient.

[0019] Furthermore, the level gauge is equipped with axial reinforcing ribs, which improves the axial bending resistance and torsional deformation resistance of the level gauge, making it less prone to deformation and extending its service life.

[0020] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0021] 1. During the up-and-down movement of the float, the sliding sleeve moves up and down with the float. The limiting part can restrict the radial movement of the sliding sleeve. The sliding sleeve slides axially along the cylindrical section, which can prevent the sliding sleeve from colliding with the liquid level rod and generating noise.

[0022] 2. The float can be disassembled and separated from the sliding sleeve for easy replacement and immediate use without removing the sliding sleeve, thus reducing maintenance difficulty.

[0023] 3. The mounting plate can be disassembled and separated from the sheet metal parts, making assembly simple and replacing bolt connections, which is labor-saving and convenient. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the anti-float rotation liquid level switch of this utility model;

[0026] Figure 2 This is a structural diagram showing the disassembled installation components of this utility model;

[0027] Figure 3 This is a schematic diagram of the connection between the sliding sleeve and the bracket in this utility model;

[0028] Figure 4 This is a schematic diagram of the connection between the float and the support in this utility model;

[0029] Figure 5 This is a schematic diagram of the internal structure of the float in this utility model.

[0030] In the diagram: 1-Level rod; 2-Float; 3-Cylindrical section; 4-Upper limit end face; 5-Sliding sleeve; 6-Pin; 7-End block; 8-Limiting part; 9-Variable diameter through groove; 10-Bracket; 11-Support part; 12-Upper blocking part; 13-Elastic hook part; 14-First through groove; 15-Second through groove; 16-Guide part; 17-Vertical guide groove; 18-Axial reinforcing rib; 19-Mounting component; 20-Mounting plate; 21-Sheet metal part; 22-Slot; 23-Opening; 24-Elastic block; 25-Outward protrusion; 26-Limiting hole; 27-Mounting part; 28-Mounting through hole; 29-Notch. Detailed Implementation

[0031] like Figures 1 to 5 As shown, this utility model discloses a level switch for preventing float rotation, comprising: a level rod 1, a lower limit member, and a float 2. The level rod 1 has a cylindrical section 3, and an upper limit end face 4 is formed between the cylindrical section 3 and the level rod 1. The lower limit member is located at the bottom of the level rod 1. The float 2 is fitted onto the cylindrical section 3 via a sliding sleeve 5. The gap width between the inner wall of the sliding sleeve 5 and the outer wall of the cylindrical section 3 is 0.1-1mm. The float 2 slides between the upper limit end face 4 and the lower limit member.

[0032] The liquid level rod 1 contains a sensing element, and the sliding sleeve 5 contains a magnetic ring. The sensing element and the magnetic ring are paired to form a sensing mechanism to monitor changes in liquid level. This is existing technology and will not be described in detail here.

[0033] The lower limit component uses a pin 6, the length of which is greater than the outer diameter of the sliding sleeve 5. The bottom of the cylindrical section 3 is provided with an end block 7, the cross-sectional diameter of which is smaller than that of the cylindrical section 3. The end block 7 is provided with a transverse through hole, which is interference-fitted with the pin 6 for a tight connection, thus improving the installation stability of the pin 6.

[0034] The upper limit end face 4 extends downward to form a limiting part 8, which is connected to the cylindrical section 3, indirectly improving the connection strength between the liquid level rod 1 and the cylindrical section 3. The sliding sleeve 5 has a notch 29 corresponding to the limiting part 8.

[0035] When installing the sliding sleeve 5, the sliding sleeve 5 is placed on the cylindrical section 3 from bottom to top, and the limiting part 8 is covered by the notch 29 to achieve the positioning of the sliding sleeve 5 on the cylindrical section 3. Then, the pin 6 is pressed in and passes through the transverse through hole of the end block 7 to achieve the fixation of the pin 6.

[0036] During the up-and-down movement of the float 2, the sliding sleeve 5 moves up and down with the float 2. The limiting part 8 can restrict the radial movement of the sliding sleeve 5. The sliding sleeve 5 slides axially along the cylindrical section 3, which can prevent the sliding sleeve 5 from colliding with the liquid level rod 1 and generating noise.

[0037] The float 2 is provided with a variable diameter through groove 9. The bottom surface of the sliding sleeve 5 is symmetrically distributed with brackets 10. The brackets 10 are engaged with the variable diameter through groove 9. The brackets 10 include a support part 11. The support part 11 is provided with an upper blocking part 12 and an elastic hook part 13. The elastic hook part 13 can be made of aluminum alloy. The variable diameter through groove 9 includes a first through groove 14 and a second through groove 15. The first through groove 14 communicates with the second through groove 15 and is located above the second through groove 15. The cross-sectional diameter of the second through groove 15 is larger than the cross-sectional diameter of the first through groove 14. The second through groove 15 corresponds to the elastic hook part 13.

[0038] The float 2 can be detached from the sliding sleeve 5 for easy replacement and immediate use without removing the sliding sleeve 5, thus reducing maintenance difficulty. During installation, the support part 11 is inserted into the first through groove 14. The elastic hook part 13 abuts against the inner wall of the first through groove 14 and deforms. When the elastic hook part 13 enters the second through groove 15, the elastic hook part 13 returns to its original shape, preventing the float 2 from moving downward. The upper blocking part 12 is located above the float 2, preventing the float 2 from moving upward. Both upward and downward movements are restricted, thus limiting the float 2 to the bracket 10 for reliable installation. During disassembly, the elastic hook part 13 is squeezed to deform it so that it can pass through the first through groove 14, at which point the float 2 can be removed.

[0039] The support part 11 is provided with a guide part 16, and the float 2 is provided with a vertical guide groove 17 corresponding to the guide part 16. The vertical guide groove 17 communicates with the variable diameter through groove 9.

[0040] When installing float 2, the guide part 16 is inserted into the vertical guide groove 17 to guide the installation, which reduces the installation difficulty. After assembly, float 2 is not easy to sway laterally and has high stability.

[0041] The liquid level rod 1 is provided with axial reinforcing ribs 18, which improves the axial bending resistance and torsional deformation resistance of the liquid level rod 1, making it less prone to deformation and with a long service life.

[0042] The liquid level rod 1 is connected to an installation assembly 19, which includes an installation plate 20 and a sheet metal part 21. The installation plate 20 is fixed on the liquid level rod 1. The bottom surface of the installation plate 20 has symmetrically distributed slots 22 corresponding to the horizontal sections of the sheet metal part 21. The installation plate 20 has an opening 23, and an elastic block 24 is provided in the opening 23. The elastic block 24 can be made of aluminum alloy. The elastic block 24 has an outward protrusion 25, which is set downward. The sheet metal part 21 has a limiting hole 26 corresponding to the outward protrusion 25.

[0043] The mounting plate 20 can be detached from the sheet metal part 21, making assembly simple and replacing bolt connections, thus saving effort and making operation convenient. During installation, the horizontal section of the sheet metal part 21 is aligned with the slot 22 and inserted. The horizontal section of the sheet metal part 21 will press against the protrusion 25. When the protrusion 25 meets the limiting hole 26, the protrusion 25 is embedded in the limiting hole 26, thereby restricting further sliding of the sheet metal part 21. This achieves a fixed connection between the mounting plate 20 and the sheet metal part 21, making it difficult to separate freely and ensuring reliable assembly. The horizontal section of the sheet metal part 21 is in close contact with the inner wall of the slot 22, resulting in high friction and preventing relative movement between the sheet metal part 21 and the mounting plate 20, thus ensuring high assembly stability.

[0044] The sheet metal part 21 is provided with a mounting part 27, and the mounting part 27 is provided with a mounting through hole 28. A nail is passed through the mounting through hole 28 to facilitate fixing the sheet metal part 21 to the installation position of the air conditioner water receiving tray, making installation convenient.

[0045] 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 level switch to prevent float rotation, including: A liquid level rod, the liquid level rod having a cylindrical section, and an upper limit end face being formed between the cylindrical section and the liquid level rod; A lower limit component is provided at the bottom of the liquid level rod; A float is fitted onto the cylindrical section via a sliding sleeve, and the float slides between the upper limit end face and the lower limit member; Its features are: The upper limit end extends downward to form a limiting part, which is connected to the cylindrical section. The sliding sleeve has a notch corresponding to the limiting part to restrict the radial movement of the float.

2. The level switch for preventing float rotation according to claim 1, characterized in that: The float is provided with a variable diameter through groove, and the sliding sleeve is provided with a bracket. The bracket and the variable diameter through groove are engaged to make the sliding sleeve detachably connected to the float.

3. The level switch for preventing float rotation according to claim 2, characterized in that: The bracket includes a support portion, on which an upper blocking portion and an elastic hook portion are provided. The variable diameter through groove includes a first through groove and a second through groove. The first through groove is located above the second through groove. The cross-sectional diameter of the second through groove is larger than that of the first through groove. The second through groove corresponds to the elastic hook portion. The elastic hook enters the second through slot from the first through slot, and the upper blocking part is located above the float. The upper blocking part cooperates with the elastic hook to restrict the free movement of the float.

4. The level switch for preventing float rotation according to claim 3, characterized in that: The support is provided with a guide section, and the float is provided with a vertical guide groove corresponding to the guide section.

5. The level switch for preventing float rotation according to claim 1, characterized in that: The bottom of the cylindrical section is provided with an end block, and the end block is provided with a transverse through hole, which is interference-fitted with the lower limiting member.

6. The level switch for preventing float rotation according to claim 1, characterized in that: The liquid level rod is connected to an installation assembly, which includes an installation plate and a sheet metal part. The installation plate is disposed on the liquid level rod, and the sheet metal part is snapped onto the installation plate. The installation plate is provided with an elastic block, and the elastic block is provided with an outward protrusion. The sheet metal part is provided with a limiting hole corresponding to the outward protrusion.

7. The level switch for preventing float rotation according to claim 6, characterized in that: The mounting plate has symmetrically distributed slots corresponding to the horizontal sections of the sheet metal parts.

8. The level switch for preventing float rotation according to claim 6, characterized in that: The sheet metal part is provided with a mounting part, and the mounting part is provided with a mounting through hole.

9. The level switch for preventing float rotation according to claim 1, characterized in that: The liquid level rod is provided with axial reinforcing ribs.

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