Novel float type liquid level switch

Abstract

A novel float-type liquid level switch belongs to the technical field of liquid level detection equipment and comprises a float, a sleeve, a voltmeter, an upper shell, a thermistor, a detection circuit and a temperature display circuit. The upper end of the sleeve is mounted at the lower end of the upper shell, the thermistor is mounted at the lower end in the sleeve, and the inner side of the floater movably sleeves the outer side end of the sleeve; each detection circuit is matched with a Hall sensor, the Hall sensors are mounted at the front side end of a strip-shaped circuit board at equal intervals from top to bottom, and the strip-shaped circuit board is vertically distributed and mounted in a sleeve; and the voltmeter, the detection circuit and the temperature display circuit are arranged in the upper shell and are electrically connected. The liquid level display device can display more depths and specific liquid level numbers of an area where the liquid level display device is located in real time, a technician can output more different liquid level depth control signals to other electric equipment through one corresponding Hall sensor, the temperature of liquid in the area where the liquid level display device is located can also be displayed, and therefore the liquid level display device is relatively convenient to use and has more functions.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid level switch equipment technical field, especially a new type of float type liquid level switch. BACKGROUND

[0002] The float type liquid level switch is a kind of equipment for liquid level detection, mainly by magnetic float, plastic or stainless steel tube (the following content is collectively referred to as sleeve) and the dry reed tube built-in composition.Its working principle is through the float in the liquid floating to drive magnet to move, and then through magnetic force control switch action.

[0003] Although the existing float type liquid level switch meets the work needs to some extent, but due to the structure, there are still the following technical defects.Specifically, the dry reed tube built-in sleeve usually only has two, two dry reed tubes are installed in the upper and lower ends in sleeve, and only the highest and lowest liquid level of set value can be detected, when the control liquid level needs to be changed in production, only the float type liquid level switch is fixed in the different depth of relevant area again, so that the float type liquid level switch is disassembled and assembled, which brings inconvenience to workers.In addition, the existing float type liquid level switch does not have depth and liquid temperature display function in the area, and the function is relatively single.In summary, it is very necessary to provide a float type liquid level switch with more functions. CONTENT OF THE UTILITY MODEL

[0004] In order to overcome the drawbacks of the existing float type liquid level switch due to the structure, as described in the background art, the utility model provides a kind of under the joint action of relevant mechanism, can realize the liquid level more depth value display (and output corresponding different liquid level depth control signal to other electric equipment) in the area, and can display the temperature of liquid in the area, so as to realize the relatively convenient use, and the new type of float type liquid level switch with more functions and effects.

[0005] The technical scheme adopted by the utility model to solve its technical problems is:

[0006] The utility model provides a novel float type liquid level switch, including hollow annular float, hollow sleeve, voltmeter, upper casing, thermistor, still have detection circuit, temperature display circuit, the inside of hollow annular float installs annular permanent magnet, the upper end of sleeve installs in the lower end of upper casing, thermistor installs in the lower end of sleeve inside, and thermistor temperature sensing surface is located sleeve lower outside, the inside of float is movably sleeved in the outside end of sleeve, detection circuit has multichannel, and each channel detection circuit is equipped with hall sensor, and a plurality of hall sensors are installed in the front side end of strip circuit board from top to bottom at equal distance, and strip circuit board is installed in sleeve inside vertically, voltmeter, detection circuit, temperature display circuit are installed in upper casing, and the front side end of upper casing is installed with observation board, the side end of upper casing is installed with wire tube, and the outside of wire tube has elastic plug, the power output end of multichannel detection circuit, temperature display circuit is electrically connected with the power input end of two voltmeters respectively, and the power output end of one of detection circuit is electrically connected with the control signal input end of electric equipment.

[0007] Further, the inside diameter of the float is greater than the outer diameter of the sleeve, and the lower part of the sleeve and the upper part of the upper casing are respectively provided with a fixed plate, and the upper end and the lower end of the sleeve are respectively provided with a limiting plate.

[0008] Further, in the multichannel detection circuit, the distance between the magnetic sensing surfaces of the two adjacent hall sensors from top to bottom is less than the thickness of the magnet.

[0009] Further, the detection circuit includes two resistors connected in series and connected with the hall sensor, one end of the first resistor is connected with the power output end of the hall sensor, the negative power input end of the hall sensor is connected with one end of the second resistor, and the other ends of the first resistor and the second resistor are connected.

[0010] Further, the resistance values of the second resistors connected with the power output ends of the hall sensors of the multichannel detection circuit installed on the strip circuit board from bottom to top are sequentially increased.

[0011] Further, the temperature display circuit is a resistor connected with the thermistor, and one end of the thermistor is electrically connected with one end of the resistor.

[0012] The utility model discloses a beneficial effect compared with prior art is: the utility model discloses through fixed plate, bolt installs in the liquid in relevant area, under the effect of floater, stainless steel bushing, first voltmeter and multichannel detection circuit etc., can show more depth, specific liquid level digit of the area of being in real time, and technical personnel pass through corresponding one hall sensor, can output more different liquid level depth control signal to other electrical equipment (output high level signal to the electrical equipment of needing liquid level control, for example, output high level signal to the positive power input end of relay, and the relay closes the input end of control power and the normally open contact end in corresponding liquid level electricity absorption, and the liquid level pump works and extracts the liquid in relevant area part, keeps the liquid level depth constant in relevant area etc.), also can show the temperature of the liquid in the area, thereby realize relatively convenient, and the effect of more function of using. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model will be further explained below combining with the drawings and examples.

[0014] Figure 1 It is the structure schematic diagram of the utility model.

[0015] Figure 2 It is the circuit diagram of the utility model. DETAILED DESCRIPTION

[0016] Figure 1 、 2As shown in the figure, the new float type liquid level switch, including stainless steel hollow float 1, stainless steel sleeve 2, voltmeter V1 and V2, upper shell 3, power module U1, thermistor W, also has detection circuit 4, temperature display circuit 5; the inside of the hollow float 1 is adhered with a ring-shaped hollow permanent magnet 101, the upper end of the hollow sleeve 2 is welded in the middle of the lower end of the upper shell 3, the thermistor W is sealed and adhered in the lower end of the sleeve 2, and the temperature sensing surface of the thermistor W is located outside the lower end of the sleeve 2, the inner ring of the hollow float 1 is movably sleeved on the outer end of the sleeve 2; the detection circuit 4 has multiple paths (such as 60 paths), each detection circuit 4 is matched with a Hall sensor U2 (U2N), multiple Hall sensors U2 (U2N) are welded on the front side end of the strip-shaped circuit board 6 at equal distances from top to bottom, and the magnetic sensing surface thereof is located on the front side, and the strip-shaped circuit board 6 is vertically distributed and fixedly installed in the sleeve 2; the voltmeter V1 and V2, the power module U1, the detection circuit 4, and the temperature display circuit 5 are installed on the circuit board in the upper shell 3, and a transparent glass observation plate 31 (convenient for workers to watch the voltmeter data) is sealed and installed on the front side end of the upper shell 3, and the display interfaces of the two voltmeters V1 and V2 are located on the front side; a wire tube 102 is welded on the right side end of the upper shell, which is communicated with the inside thereof, and the wires connected with the thermistor W, the detection circuit 4, the temperature display circuit 5, the power module U1, the voltmeter V1 and V2 are led out to the outside end through the wire tube 102, and the wire tube 102 has a rubber sealing plug 103 (to prevent water and the like from entering the sleeve).

[0017] Figure 1 、 2The inner diameter of the inner side of the float 1 is slightly larger than the outer diameter of the sleeve 2, and the lower part of the sleeve 2 and the upper part of the rear end of the upper shell are respectively fixedly installed with an "˩" type fixed plate (not shown in the figure, which is convenient to fix the sleeve at the relevant detection position), and the fixed plate has a fixed hole. The upper end and the lower end of the sleeve are respectively welded with a limiting plate 21 with an outer diameter larger than the inner diameter of the float. In the multi-path detection circuit, the distance between the magnetic sensing surfaces of each adjacent upper and lower Hall sensor U2 (U2N) is less than the thickness of the magnet 101. Each detection circuit includes two resistors R1 and R2 (R1N and R2N) connected through the circuit board, and is connected with the Hall sensor U2 (U2N) through a wire. One end of the first resistor R1 (R1N) is connected with the power output end 3 foot of the Hall sensor U2 (U2N), and the negative power input end 2 foot of the Hall sensor U2 (U2N) is connected with one end of the second resistor R2 (R2N). The other ends of the first resistor R1 (R1N) and the second resistor R2 (R3N) are connected. The resistance values of the Hall sensor U2 (U2N) of the multi-path detection circuit installed from bottom to top on the strip-shaped circuit board and the second resistor R2 (R2N) connected with the power output end 3 foot of the Hall sensor U2 (U2N) are successively increased (the resistance value of the second resistor at the lower end is greater than that of the second resistor at the upper end). The temperature display circuit is a resistor R3, and is connected with the thermistor W through a wire. One end of the thermistor W is connected with one end of the resistor R3 through a wire.

[0018] Figure 1 、 2 As shown in the figure, the power input ends 1 and 2 feet of the power module U1 are respectively connected with two poles of the alternating current 220V power supply through a wire. The power output ends 3 and 4 feet of the power module U1 are connected with the power input ends 1 and 2 feet of the Hall sensor U2 (U2N) of the multi-path detection circuit, the other end of the power input end of the temperature switch W of the temperature display circuit and the other end of the resistor R3 through a wire. The other end of the power output end of the resistor R1 (R1N) and one end of the resistor R2 (R2N) of the multi-path detection circuit, and the power output end of the resistor R3 of the temperature display circuit are respectively connected with the power input ends of the two voltmeters V1 and V2 through a wire. One of the power output ends of the detection circuit and one of the 3 feet of the Hall sensor U2 (U2N) are connected with the control signal input end of the electrical equipment through a wire (outputting a high level signal to the electrical equipment that needs to control the liquid level, such as outputting a high level signal to the positive power input end of the relay. The relay is in the corresponding liquid level and is attracted to control the power input end and the normally open contact end to close. The liquid level pump is powered to work to extract part of the liquid in the relevant area, keep the liquid level depth in the relevant area constant, etc.).

[0019] Figure 1 、 2As shown, the utility model discloses a liquid level detection device, including the fixed plate, the float, the magnet, the sleeve pipe, the hall sensor, the voltage table, the temperature display circuit, the power module U1, the resistance R1, the resistance R2, the voltage table V2, the resistance R3, the float is installed in the relevant area liquid in the fixed plate bolt etc., the power module U1 is electrified and works, and the 3 and 4 feet output stable direct current 12V power of power module U1 enters the power input end of multichannel detection circuit, temperature display circuit.

[0020] Figure 1 、 2 As shown, through the above, the utility model can display more depth, specific liquid level number of the area in real time, and the technical personnel can output more different liquid level depth control signals to other electrical equipment through the corresponding one hall sensor, and also can display the temperature of the liquid in the area, thereby realizing the effect of relatively convenient use and more functions. Figure 2In the middle, power module U1 is AC 220V to DC 12V switching power module finished product; Hall sensor U2 (U2N) is a TO-92 49E patch Hall switch sensor finished product, the magnet is close to the magnetic sensitive surface, the power output end 3 foot output power, otherwise not; The thermistor W is a negative temperature coefficient thermistor of type NTC103D; The voltmeter V1, V2 is a four-bit liquid crystal voltage display meter finished product with a range of DC 12V; The resistance value of a plurality of resistors R1 (R1N) is the same, which is 60K; In the new type, the strip-shaped circuit board is distributed from top to bottom, and the resistance values of the 60 resistors R2 (R2N) are 60K, 59.9K, 59.8K, 59.7K, 59.6K, 59.5K, etc. (The resistance values of the subsequent 55 resistors decrease by 100Ω in turn).

[0021] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and for those skilled in the art, it is obvious that the utility model is limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model.

[0022] In addition, it should be understood that, although the present specification is described in terms of embodiments, the embodiments do not contain only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A new type of float level switch comprising a hollow annular float, a hollow sleeve, a voltmeter, an upper housing, a thermistor, characterized in that, It also has a detection circuit, temperature display circuit; the hollow annular float inside is provided with an annular permanent magnet, the upper end of the sleeve is installed on the lower end of the upper shell, the thermistor is installed on the lower end of the sleeve, and the thermistor temperature sensing surface is located on the outside of the lower end of the sleeve, and the inside of the float is movably sleeved on the outside end of the sleeve; the detection circuit has multiple paths, each path of the detection circuit is matched with a Hall sensor, and multiple Hall sensors are installed on the front side end of the strip-shaped circuit board at equal distances from top to bottom, and the strip-shaped circuit board is vertically distributed and installed in the sleeve; the voltmeter, detection circuit and temperature display circuit are installed in the upper shell, and the observation plate is installed on the front side end of the upper shell; the side end of the upper shell is provided with a wire tube, and the outside of the guide tube is provided with an elastic plug; the power output ends of the multiple detection circuits and the temperature display circuit are electrically connected with the power input ends of the two voltmeters, and the power output end of one of the detection circuits is electrically connected with the control signal input end of the electric equipment.

2. The novel float type liquid level switch as claimed in claim 1 wherein, The inside diameter of the float is greater than the outside diameter of the sleeve, and the lower part of the sleeve and the upper part of the upper shell are respectively provided with fixed plates, and the upper end and the lower end of the sleeve are respectively provided with limiting plates.

3. The novel float type liquid level switch as claimed in claim 1 wherein, In the multiple detection circuits, the distance between the magnetic sensing surfaces of the two adjacent Hall sensors from top to bottom is less than the thickness of the magnet.

4. The novel float type liquid level switch as claimed in claim 1 wherein, The detection circuit includes two resistors connected in series, and is connected with the Hall sensor, one end of the first resistor is connected with the power output end of the Hall sensor, the negative power input end of the Hall sensor is connected with one end of the second resistor, and the other ends of the first resistor and the second resistor are connected.

5. The novel float type liquid level switch as claimed in claim 4, wherein, The resistance values of the second resistors connected with the Hall sensors of the multiple detection circuits installed on the strip-shaped circuit board from bottom to top are gradually increased.

6. The novel float type liquid level switch as claimed in claim 1 wherein, The temperature display circuit is a resistor connected with the thermistor, and one end of the thermistor is connected with one end of the resistor.

Images