A liquid level switch

Abstract

The present invention provides a liquid level switch, comprising a magnetic float that can change with the liquid level in a container, a guide rod, a plurality of liquid level sensors, and a plurality of adjustment mechanisms, wherein the plurality of liquid level sensors are sleeved on the guide rod and can move up and down along the length direction of the guide rod, and the plurality of adjustment mechanisms are respectively connected to the plurality of liquid level sensors in a transmission manner and can respectively drive the plurality of liquid level sensors to move up and down along the length direction of the guide rod. The present invention drives the liquid level sensor to move up and down along the length direction of the guide rod through the adjustment mechanism, and can adjust the height position of the liquid level sensor according to actual needs to meet the detection requirements of different liquid levels.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid level switches, and in particular to a liquid level switch. Background Art

[0002] As a liquid level control sensor, float switches are widely used in water treatment equipment, household appliances, automobile oil levels, medical equipment and other fields to detect the liquid levels of different media such as water, oil or chemical solutions. Float switches are generally divided into three types: reed switch sensor type, Hall sensor type and magnetic resistance sensor type. They use the change of magnetic field generated by the magnetic float moving up and down with the change of liquid level to activate the liquid level sensor to detect the liquid level.

[0003] For existing float switches, the installation position of the liquid level sensor is generally fixed, and the height cannot be adjusted as needed to meet different liquid level detection requirements. The structure needs to be improved. Summary of the invention

[0004] Based on this, in order to solve the problem that the existing float switch cannot adjust the height as needed to meet different liquid level detection requirements, the present invention provides a liquid level switch, and its specific technical solution is as follows:

[0005] A liquid level switch, comprising a guide rod and a magnetic float that can change with the liquid level in a container; the liquid level switch also includes:

[0006] A plurality of liquid level sensors are sleeved on the guide rod and can move up and down along the length direction of the guide rod;

[0007] A plurality of adjusting mechanisms are respectively connected to the plurality of liquid level sensors in a transmission manner and can respectively drive the plurality of liquid level sensors to move up and down along the length direction of the guide rod.

[0008] The liquid level sensor is driven to move up and down along the length direction of the guide rod by the adjustment mechanism, and the height position of the liquid level sensor can be adjusted according to actual needs to meet the detection requirements of different liquid levels.

[0009] Furthermore, the liquid level sensor includes multiple, the adjustment mechanism includes a first adjusting bolt, a base, an on-off assembly and multiple telescopic assemblies, the base is provided with a first chamber and multiple second chambers, the multiple second chambers correspond one-to-one to the multiple telescopic assemblies, the multiple telescopic assemblies each include a piston rod and a hydraulic cylinder sleeve having a telescopic structure with at least two levels stacked together, one end of the piston rod is sleeved in the innermost hydraulic cylinder sleeve, the other end of the piston rod is fixedly connected to the liquid level sensor, the outermost hydraulic cylinder sleeve is connected to the first chamber and is sealed with the side wall of the first chamber, one end of the first adjusting bolt extends into the second chamber and is threadedly connected to the side wall of the second chamber, the on-off assembly is installed on the base and can control the connection and isolation between the first chamber and the second chamber.

[0010] Furthermore, the on-off assembly includes a switch valve fixedly mounted on the outer side of the base, one port of the switch valve is communicated with the first chamber, and the other port of the switch valve is communicated with the second chamber.

[0011] Furthermore, the first chamber and the second chamber are both filled with liquid.

[0012] Furthermore, the diameter of the first adjusting bolt is greater than the inner diameter of the hydraulic cylinder sleeve located at the outermost layer.

[0013] Furthermore, the liquid level switch also includes a second adjusting bolt, one end of which extends into the second chamber and is threadedly connected to a side wall of the second chamber.

[0014] Furthermore, the diameter of the second adjusting bolt is smaller than the diameter of the piston rod.

[0015] Furthermore, the liquid is lubricating oil.

[0016] Furthermore, the regulating mechanism comprises a plurality of multi-section telescopic hydraulic cylinders, and the piston rods of the plurality of multi-section telescopic hydraulic cylinders are respectively transmission-connected to a plurality of the liquid level sensors.

[0017] Furthermore, the liquid level switch also includes a non-magnetic conduit communicated with the inner cavity of the container, and the magnetic float is installed in the non-magnetic conduit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0019] Figure 1It is a schematic diagram of the overall structure of a liquid level switch in one embodiment of the present invention;

[0020] Figure 2 It is a structural schematic diagram of an adjustment mechanism of a liquid level switch in one embodiment of the present invention;

[0021] Figure 3 It is a schematic diagram of the structural relationship between a first chamber, a second chamber and a switching assembly of a liquid level switch in one embodiment of the present invention;

[0022] Figure 4 It is a structural schematic diagram of a telescopic component of a liquid level switch in one embodiment of the present invention.

[0023] Description of reference numerals:

[0024] 1. Magnetic float; 2. Liquid level sensor; 3. Adjustment mechanism; 4. Non-magnetic conduit; 5. Guide rod; 30. First adjustment bolt; 31. Base; 32. On / off assembly; 33. Telescopic assembly; 34. Second adjustment bolt; 310. First chamber; 311. Second chamber; 330. Piston rod; 331. Hydraulic cylinder sleeve; 332. First retaining ring; 333. Second retaining ring; 334. Third retaining ring; 335. Fourth retaining ring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the protection scope of the present invention.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] The “first” and “second” mentioned in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0029] like Figure 1 As shown, a liquid level switch in an embodiment of the present invention includes a guide rod 5 and a magnetic float 1 that can change with the liquid level in the container; the liquid level switch also includes a plurality of liquid level sensors 2 and a plurality of adjustment mechanisms 3.

[0030] A plurality of liquid level sensors 2 are sleeved on the guide rod 5 and can move up and down along the length direction of the guide rod 5; a plurality of adjustment mechanisms 3 are respectively connected to the plurality of liquid level sensors 2 in transmission and can respectively drive the plurality of liquid level sensors 2 to move up and down along the length direction of the guide rod 5.

[0031] Here, the liquid level sensor 2 includes but is not limited to a reed switch, a Hall sensor and a magnetoresistive sensor. The adjustment mechanism 3 has a telescopic function and can be extended or shortened manually or electrically to drive the liquid level sensor 2 to move up and down along the length direction of the guide rod 5.

[0032] The magnetic float 1 is used in combination with the liquid level sensor 2. When the magnetic float 1 floats to the same height as the liquid level sensor 2, the liquid level sensor 2 is activated by the magnetic effect of the magnetic float 1 and outputs a level signal or a current signal. The controller processes the level signal or the current signal, that is, the liquid level height can be detected.

[0033] The liquid level sensor 2 is driven to move up and down along the length direction of the guide rod 5 by the adjustment mechanism 3 , and the height position of the liquid level sensor 2 can be adjusted according to actual needs to meet the detection requirements of different liquid levels.

[0034] In one embodiment, if Figure 2As shown, the liquid level sensor 2 includes multiple, the adjustment mechanism 3 includes a first adjusting bolt 30, a base 31, an on-off assembly 32 and multiple telescopic assemblies 33, the base 31 is provided with a first chamber 310 and multiple second chambers 311, the multiple second chambers 311 correspond one-to-one to the multiple telescopic assemblies 33, the on-off assembly 32 includes multiple and corresponds one-to-one to the second chambers 311 respectively, the on-off assembly 32 is installed on the base 31 and can control the connection and isolation between the first chamber 310 and the second chamber 311. Through the on-off assembly 32, the first chamber 310 can be controlled to be connected or disconnected with one or more second chambers 311; multiple telescopic assemblies 33 each include a piston rod 330 and a hydraulic cylinder sleeve 331 with a telescopic structure having at least two levels stacked together, one end of the piston rod 330 is sleeved in the innermost hydraulic cylinder sleeve 331, and the other end of the piston rod 330 is fixedly connected to the liquid level sensor 2. The outermost hydraulic cylinder sleeve 331 is connected to the first chamber 310 and is sealed with the side wall of the first chamber 310. One end of the first adjusting bolt 30 extends into the second chamber 311 and is threadedly connected to the side wall of the second chamber 311.

[0035] The first chamber 310 and the second chamber 311 are both filled with liquid, which may be lubricating oil, water, or a water-oil mixture.

[0036] Since the hydraulic cylinder sleeve 331 located at the outermost layer is connected to the first chamber 310 and is sealed with the side wall of the first chamber 310, the volume of the second chamber 311 can be adjusted by adjusting the length of one end of the first adjusting bolt 30 extending into the second chamber 311, and the telescopic length of the telescopic assembly 33 can be adjusted, thereby adjusting the height of the liquid level sensor 2.

[0037] For a container containing liquid, it is necessary to detect the liquid level at different points to avoid the liquid level in the container being too high or too low. In actual situations, it is often necessary to adjust the liquid level height detection point to meet production needs. By controlling the first chamber 310 to be connected or disconnected with one or more of the second chambers 311, the height of the multiple liquid level sensors 2 can be selectively adjusted to adjust the liquid level height detection point to meet different liquid level detection needs.

[0038] In one embodiment, if Figure 3 As shown, the on-off assembly 32 includes a switch valve fixedly mounted on the outside of the base 31. Of course, the on-off assembly 32 includes but is not limited to the switch valve, and other structures can also be used to achieve the connection or isolation control between the first chamber 310 and the plurality of second chambers 311, which will not be repeated here.

[0039] One port of the switch valve is connected to the first chamber 310 through a connecting pipe, and the other port of the switch valve is connected to the second chamber 311 through a connecting pipe. The switch valve can selectively control the first chamber 310 to be connected or disconnected with one or more second chambers 311.

[0040] In one embodiment, the diameter of the first adjusting bolt 30 is larger than the inner diameter of the outermost hydraulic cylinder sleeve 331. Thus, one end of the first adjusting bolt 30 can be telescoped a short distance in the second chamber 311, so that the telescopic assembly 33 can be telescoped a long distance. By utilizing the ratio difference between the diameter of the first adjusting bolt 30 and the inner diameter of the outermost hydraulic cylinder sleeve 331, the telescopic length of the telescopic assembly 33 can be greatly controlled by only slightly rotating the first adjusting bolt 30, thereby saving time and improving work efficiency.

[0041] In one embodiment, if Figure 2 As shown, the liquid level switch also includes a second adjusting bolt 34 , one end of which extends into the second chamber 311 and is threadedly connected to the side wall of the second chamber 311 , and the diameter of the second adjusting bolt 34 is smaller than the diameter of the piston rod 330 .

[0042] The diameter of the first adjusting bolt 30 is larger than the inner diameter of the outermost hydraulic cylinder sleeve 331, and the diameter of the second adjusting bolt 34 is smaller than the diameter of the piston rod 330. The first adjusting bolt 30 can be used to roughly adjust the telescopic length of the telescopic assembly 33 and the height position of the liquid level sensor 2. After roughly adjusting the height position of the liquid level sensor 2, the second adjusting bolt 34 can be used to fine-tune the height position of the liquid level sensor 2. The combination of rough adjustment and fine adjustment can quickly and accurately adjust the height of the liquid level sensor 2.

[0043] In one embodiment, the regulating mechanism 3 includes a plurality of multi-section telescopic hydraulic cylinders, and the piston rods 330 of the plurality of multi-section telescopic hydraulic cylinders are respectively connected to a plurality of the liquid level sensors 2 in a transmission manner.

[0044] In one embodiment, if Figure 1 As shown, the liquid level switch further comprises a non-magnetic conduit 4 communicating with the inner cavity of the container, and the magnetic float 1 is installed in the non-magnetic conduit 4 .

[0045] Specifically, the non-magnetic conduit 4 may be a plastic tube with openings at both ends.

[0046] In one embodiment, if Figure 4As shown, each layer of the hydraulic cylinder sleeve 331 is provided with a first baffle ring 332 extending radially outward and a second baffle ring 333 extending radially inward at one end close to the first chamber 310, the piston rod 330 is provided with a third baffle ring 334 at one end located in the innermost layer of the hydraulic cylinder sleeve 331, and each layer of the hydraulic cylinder sleeve 331 is provided with a fourth baffle ring 335 extending radially inward at one end away from the first chamber 310.

[0047] A limiting mechanism is formed between the first retaining ring 332, the second retaining ring 333, the third retaining ring 334 and the fourth retaining ring 335, which can prevent the two adjacent layers of hydraulic cylinder sleeves 331 and the piston rod 9 from detaching from the innermost hydraulic cylinder sleeve 331 during the telescopic process and ensure that the telescopic assembly can telescope normally.

[0048] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A liquid level switch, comprising a guide rod and a magnetic float that changes with the liquid level in a container. It is characterized in that The liquid level switch also includes: A plurality of liquid level sensors are sleeved on the guide rod and can move up and down along the length direction of the guide rod; A plurality of adjusting mechanisms are respectively connected to the plurality of liquid level sensors and can respectively drive the plurality of liquid level sensors to move up and down along the length direction of the guide rod; The liquid level sensor comprises a plurality of the adjusting mechanisms, the adjusting mechanism comprises a first adjusting bolt, a base, an on-off assembly and a plurality of telescopic assemblies, the base is provided with a first chamber and a plurality of second chambers, the plurality of second chambers correspond to the plurality of telescopic assemblies one by one, the plurality of telescopic assemblies each comprise a piston rod and a hydraulic cylinder sleeve having a telescopic structure with at least two levels stacked and sleeved together, one end of the piston rod is sleeved in the innermost hydraulic cylinder sleeve, the other end of the piston rod is fixedly connected to the liquid level sensor, the outermost hydraulic cylinder sleeve is communicated with the first chamber and is sealed with the side wall of the first chamber, one end of the first adjusting bolt extends into the second chamber and is threadedly connected with the side wall of the second chamber, the on-off assembly is mounted on the base and can control the communication and isolation between the first chamber and the second chamber; The on-off assembly includes a switch valve fixedly mounted on the outside of the base, one port of the switch valve is connected to the first chamber, and the other port of the switch valve is connected to the second chamber; the first chamber and the second chamber are both filled with liquid; the diameter of the first adjusting bolt is larger than the inner diameter of the hydraulic cylinder sleeve located at the outermost layer.

2. A liquid level switch as claimed in claim 1, It is characterized in that The liquid level switch further comprises a second adjusting bolt, one end of which extends into the second chamber and is threadedly connected to the side wall of the second chamber.

3. A liquid level switch as claimed in claim 2, It is characterized in that The diameter of the second adjusting bolt is smaller than the diameter of the piston rod.

4. A liquid level switch as claimed in claim 3, It is characterized in that The liquid is lubricating oil.

5. A liquid level switch as claimed in claim 1, It is characterized in that The regulating mechanism comprises a plurality of multi-section telescopic hydraulic cylinders, and the output ends of the plurality of multi-section telescopic hydraulic cylinders are respectively transmission-connected with a plurality of the liquid level sensors.

6. A liquid level switch according to any one of claims 1 to 5, It is characterized in that The liquid level switch further comprises a non-magnetic conduit communicating with the inner cavity of the container, and the magnetic float is installed in the non-magnetic conduit.

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