Anti-inversion liquid level switch valve structure

Abstract

The utility model relates to the technical field of machinery. An anti-inversion liquid level switch valve structure comprises a floater bracket used for being longitudinally connected with a floater in a sliding mode. The floater bracket comprises a mounting cylinder with an opening in the upper end, and a threaded mounting structure for mounting is arranged at the top of the mounting cylinder; a through hole is formed in the side wall of the mounting cylinder, a vertically-through guide sleeve is connected to the bottom of the mounting cylinder, and an opening in butt joint with the bottom of the guide sleeve is formed in the bottom of the mounting cylinder; the floater comprises a sliding frame longitudinally connected with the guide sleeve in a sliding mode, the sliding frame is a barrel with an opening in the lower end, the side wall of the sliding frame is arranged between the outer side of the guide sleeve and the inner side of the installation barrel in a sleeving mode, and the center of the top of the sliding frame is detachably connected with a buoyancy plugging piece; the sum of the axial length of the floater and the axial length of the guide sleeve is not smaller than the axial length of the installation cylinder, and the axial length of the floater is not larger than the axial length of the installation cylinder. The liquid level switch valve is convenient to assemble by optimizing the structure of the liquid level switch valve.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery, in particular to a liquid level switch valve. Background Art

[0002] The liquid level switch valve is used to control the liquid level in a container. When the liquid level reaches a specific value, it blocks a channel.

[0003] Publication No. CN102481839A discloses an exhaust valve. In this patent, a float in a chamber can close a first exhaust hole when the liquid level reaches a predetermined level. This exhaust valve is also a type of liquid level switch valve. However, in this patent, the up and down movement of the float needs to be connected to the valve housing through an elastic member. There are many components. In addition, during the production process, the elastic member, the housing, and the float need to be assembled in advance, and the production is relatively cumbersome.

[0004] Currently, there is a lack of a liquid level switch valve structure that is easy to quickly assemble. Summary of the Utility Model

[0005] Aiming at the problems existing in the prior art, the utility model provides a liquid level switch valve structure that prevents reverse installation to solve at least one of the above technical problems.

[0006] The technical solution of the utility model is: a liquid level switch valve structure that prevents reverse installation, characterized in that it includes a float bracket for longitudinally slidingly connecting a float;

[0007] The float bracket includes an installation cylinder with an open upper end, and a threaded installation structure for installation is provided at the top of the installation cylinder;

[0008] A through hole is provided on the side wall of the installation cylinder, a guide sleeve that penetrates up and down is connected to the bottom of the installation cylinder, and an opening for docking the bottom of the guide sleeve is provided at the bottom of the installation cylinder;

[0009] It further includes a float. The float includes a sliding frame that is longitudinally slidingly connected to the guide sleeve. The sliding frame is a cylinder with an open lower end. The side wall of the sliding frame is sleeved between the outside of the guide sleeve and the inside of the installation cylinder. A buoyancy blocking member is detachably connected to the center of the top of the sliding frame;

[0010] The sum of the axial length of the float and the axial length of the guide sleeve is not less than the axial length of the installation cylinder, and the axial length of the float is not greater than the axial length of the installation cylinder.

[0011] The utility model optimizes the structure of the liquid level switch valve, facilitating assembly. The assembly relationship of the structure of the utility model is simple. During production and processing, it can be quickly assembled. It can also allow the user to perform simple and quick assembly by themselves.

[0012] In addition, when the float is installed in the float bracket, there is an anti-inversion structure. Once the float is reversely placed in the float bracket, the float will interfere with the installation of the float bracket, making it easy to quickly detect the inversion.

[0013] Further preferably, the buoyancy blocking member is snap-connected to the sliding frame.

[0014] Further preferably, a round hole is provided on the top of the sliding frame;

[0015] The buoyancy plugging member comprises an upper plugging portion, a clamping portion, a limiting portion and an introduction portion arranged from top to bottom along the axial direction;

[0016] The outer diameter of the clamping portion matches the inner diameter of the circular hole;

[0017] The outer diameters of the upper blocking portion and the limiting portion adjacent to the clamping portion are larger than the outer diameter of the clamping portion;

[0018] The outer diameter of the introduction portion is smaller than the inner diameter of the through hole;

[0019] A gradual portion with an outer diameter decreasing from top to bottom is arranged between the limiting portion and the introduction portion.

[0020] It is convenient to insert the floating plugging piece into the through hole from top to bottom for clamping and fixing.

[0021] Further preferably, the threaded mounting structure is an internal thread.

[0022] Further preferably, the threaded mounting structure is used to threadably connect a mounting sleeve located at the top of the container;

[0023] The mounting sleeve is located at the periphery of the exhaust port at the top of the container;

[0024] The buoyancy plugging member is used to abut against the lower edge of the exhaust port.

[0025] Further preferably, the top of the sliding frame is provided with a first annular protrusion and a second annular protrusion extending upward and arranged inside and outside;

[0026] The inner wall of the first annular protrusion is butted against and connected to the inner wall of the circular hole.

[0027] Further preferably, the exhaust port is directly opposite to the second annular protrusion.

[0028] Compared with the prior art, the beneficial effects of the utility model are:

[0029] The utility model provides an anti-inversion liquid level switch valve, which has a simple structure and is easy to disassemble and install.

[0030] After the liquid is inhaled into the container, wait for the float to rise with the liquid level to the exhaust port, and the exhaust port is blocked by the buoyancy sealing member to block the negative pressure source. When the float is installed upside down, the buoyancy sealing member is pressed above the guiding sleeve of the float bracket, and the float bracket cannot be screwed tightly with the mounting sleeve at the top of the container. It realizes the quick detection of the upside-down installation of the float, and the float can be quickly turned over for assembly. Brief Description of the Drawings

[0031] Figure 1 It is a schematic diagram of the cooperation state between the specific embodiment 1 of the present invention and the top of the container;

[0032] Figure 2 It is a cross-sectional view of the float bracket of the specific embodiment 1 of the present invention;

[0033] Figure 3 It is a cross-sectional view of the sliding bracket of the specific embodiment 1 of the present invention;

[0034] Figure 4 It is a cross-sectional view of the buoyancy sealing member of the specific embodiment 1 of the present invention;

[0035] Figure 5 It is a cross-sectional view of the state where the exhaust port is blocked by the buoyancy sealing member of the specific embodiment 1 of the present invention;

[0036] Figure 6 It is a schematic diagram of the upside-down state of the specific embodiment 1 of the present invention;

[0037] Figure 7 It is a partial structural schematic diagram of the specific embodiment 1 of the present invention in the assembled state with the container.

[0038] In the figure, 1 is the float bracket, 2 is the sliding bracket, 3 is the buoyancy sealing member, 11 is the mounting cylinder, 12 is the guiding sleeve, 31 is the upper sealing part, 32 is the clamping part, 33 is the limiting part, and 34 is the guiding part. Detailed Description of the Invention

[0039] See Figures 1 to 7, Specific embodiment 1, an anti-inverted liquid level switch valve structure, including a float bracket 1 for longitudinal sliding connection of a float; the float bracket 1 includes a mounting tube 11 with an upper opening, and a threaded mounting structure for mounting is arranged on the top of the mounting tube 11; a through hole is opened on the side wall of the mounting tube 11, and a guide sleeve 12 penetrating from top to bottom is connected to the bottom of the mounting tube 11, and an opening for docking the bottom of the guide sleeve 12 is opened at the bottom of the mounting tube 11; and a float is also included, the float includes a sliding frame 2 longitudinally slidably connected to the guide sleeve 12, the sliding frame 2 is a cylinder with an opening at the lower end, the side wall of the sliding frame 2 is sleeved between the outer side of the guide sleeve 12 and the inner side of the mounting tube 11, and a buoyancy plugging member 3 is detachably connected to the top center of the sliding frame 2; the sum of the axial length of the float and the axial length of the guide sleeve 12 is not less than the axial length of the mounting tube 11, and the axial length of the float is not greater than the axial length of the mounting tube 11. The utility model is convenient for assembly by optimizing the structure of the liquid level switch valve. The assembly relationship of the structure of the utility model is simple, and it can be quickly assembled during production and processing. It can also allow the user to simply and quickly assemble it by himself. In addition, when the float is installed in the float bracket 1, there is an anti-inversion structure. Once the float is reversely placed in the float bracket 1, the float will interfere with the installation of the float bracket 1, which is convenient for quick inversion.

[0040] The buoyancy blocking member 3 is engaged with the sliding frame 2 .

[0041] The lower side of the sliding frame is provided with an annular protrusion extending outward.

[0042] A circular hole is provided at the top of the sliding frame 2; the buoyancy plugging member 3 comprises an upper plugging portion 31, a clamping portion 32, a limiting portion 33 and an introduction portion 34 arranged from top to bottom along the axial direction; the outer diameter of the clamping portion 32 matches the inner diameter of the circular hole; the outer diameters of the upper plugging portion 31 and the limiting portion 33 adjacent to the clamping portion 32 are larger than the outer diameter of the clamping portion 32; the outer diameter of the introduction portion 34 is smaller than the inner diameter of the through hole; a gradual change portion with an outer diameter decreasing from top to bottom is provided between the limiting portion 33 and the introduction portion 34. It is convenient to insert the floating plugging member into the through hole from top to bottom for clamping and fixing.

[0043] The threaded mounting structure is an internal thread.

[0044] The threaded mounting structure is used to threadably connect a mounting sleeve located at the top of the container; the mounting sleeve is located on the periphery of the exhaust port at the top of the container; the buoyancy plugging member 3 is used to resist the lower edge of the exhaust port. The top of the container is provided with a liquid inlet and an exhaust port arranged side by side. The exhaust port is connected to a negative pressure source. After the liquid is sucked into the container from the liquid inlet, the float rises to the exhaust port with the liquid level, and the exhaust port is blocked by the buoyancy plugging member to block the negative pressure source. When the float is inverted, the buoyancy plugging member is pressed against the top of the guide sleeve of the float frame, and the float bracket cannot be tightened with the mounting sleeve at the top of the container. The rapid realization of the inverted float is achieved, and the float can be quickly turned over for assembly.

[0045] The top of the sliding carriage is provided with a first annular protrusion and a second annular protrusion that extend upward and are arranged inside and outside; the inner wall of the first annular protrusion is butt-connected and conducted with the inner wall of the circular hole.

[0046] The exhaust port is directly opposite to the second annular protrusion.

[0047] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A liquid level switch valve structure that prevents reverse installation, characterized in that, It includes a float bracket for longitudinally sliding and connecting a float; The float bracket includes an installation cylinder with an open upper end, and a threaded installation structure for installation is provided at the top of the installation cylinder; A through hole is formed in the side wall of the installation cylinder, a guiding sleeve penetrating up and down is connected to the bottom of the installation cylinder, and an opening for butting against the bottom of the guiding sleeve is formed at the bottom of the installation cylinder; It further includes a float, and the float includes a sliding frame longitudinally slidably connected to the guiding sleeve. The sliding frame is a cylinder with an open lower end. The side wall of the sliding frame is sleeved between the outer side of the guiding sleeve and the inner side of the installation cylinder, and a buoyancy plugging member is detachably connected to the center of the top of the sliding frame; The sum of the axial length of the float and the axial length of the guiding sleeve is not less than the axial length of the installation cylinder, and the axial length of the float is not greater than the axial length of the installation cylinder.

2. The anti-inversion liquid level switch valve structure according to claim 1, characterized in that: The buoyancy plugging member is snap-connected to the sliding frame.

3. The structure of a liquid level switch valve that prevents reverse installation according to claim 1, wherein: A round hole is formed in the top of the sliding frame; The buoyancy plugging member includes an upper plugging portion, a clamping portion, a limiting portion and a guiding portion arranged axially from top to bottom; The outer diameter of the clamping portion matches the inner diameter of the round hole; The outer diameters of the upper plugging portion and the side of the limiting portion adjacent to the clamping portion are greater than the outer diameter of the clamping portion; The outer diameter of the guiding portion is smaller than the inner diameter of the through hole; A gradually changing portion with a decreasing outer diameter from top to bottom is arranged between the limiting portion and the guiding portion.

4. The anti-inversion liquid level switch valve structure according to claim 1, characterized in that: The threaded installation structure is an internal thread.

5. The structure of a liquid level switch valve for preventing reverse installation according to claim 1, wherein: The threaded installation structure is used for threadedly connecting an installation sleeve located at the top of the container; The installation sleeve is located around the exhaust port at the top of the container; The buoyancy plugging member is used for abutting against the lower edge of the exhaust port.

6. The structure of a liquid level switch valve for preventing reverse installation according to claim 3, wherein: An upwardly extending first annular protrusion and a second annular protrusion are arranged on the top of the sliding frame; The inner wall of the first annular protrusion is butted and communicated with the inner wall of the round hole.

7. The structure of a liquid level switch valve for preventing reverse installation according to claim 6, characterized in that: The threaded installation structure is used for threadedly connecting an installation sleeve located at the top of the container; The installation sleeve is located around the exhaust port at the top of the container; The buoyancy plugging member is used for abutting against the lower edge of the exhaust port; The exhaust port is directly opposite to the second annular protrusion.

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