CN211401313U - Liquid flow sensor and liquid supply equipment - Google Patents

Abstract

The utility model discloses a liquid flow sensor relates to liquid flow monitoring technical field. The liquid flow sensor comprises a shell, a magnetic field generating assembly, a magnetic field induction assembly, a second sealing block and a signal output assembly. Wherein, be provided with sealing washer, feed liquor pipe and drain pipe on the shell, the subassembly includes impeller subassembly, a plurality of magnet and first sealed piece take place for the magnetic field, and impeller subassembly rotates with the shell to be connected, and first sealed piece is sealed a plurality of magnet on impeller subassembly, and magnetic field response subassembly and magnetic field take place that the subassembly sets up relatively and both all are located the shell, and the sealed piece of second is sealed the magnetic field response subassembly on the shell, and signal output subassembly is connected with magnetic field response subassembly electricity. The liquid flow sensor has the advantages of strong corrosion resistance, long service life and good sealing property. The utility model also discloses a liquid supply equipment of using above-mentioned liquid flow sensor, this liquid supply equipment can realize just having longer life to liquid flow's accurate control.

Description

Liquid flow sensor and liquid supply equipment

Technical Field

The utility model relates to a liquid flow monitoring technology field especially relates to a liquid flow sensor and liquid supply equipment.

Background

As liquid supply apparatuses are becoming more sophisticated, more and more liquid supply apparatuses are required to monitor the flow rate of liquid.

Current liquid flow sensor includes the shell, impeller subassembly, the feed liquor pipe, the drain pipe, magnet, hall element, wherein magnet is fixed on impeller subassembly, impeller subassembly sets up on the shell, feed liquor pipe and drain pipe subtend respectively set up the both ends at the shell, hall element sets up on the shell, when feed liquor pipe gets into liquid, liquid drive impeller subassembly rotates, impeller subassembly drives magnet and rotates the magnetic field that produces the change, hall element monitors the magnetic field output to the controller that changes, realize liquid flow sensor monitoring liquid flow.

Because the magnet and the Hall element of the existing liquid flow sensor are easily corroded by liquid and external pollutants in the working process, the magnet and the Hall element lose effectiveness, the working stability of the liquid flow sensor is influenced, and the service life of the liquid flow sensor is shortened. Meanwhile, the shell of the existing liquid flow sensor is easy to leak liquid in the using process, so that the measuring precision of the liquid flow sensor is seriously influenced, and liquid supply equipment is polluted.

Therefore, it is highly desirable to invent a liquid flow sensor with high corrosion resistance and good sealing performance and a liquid supply apparatus using the liquid flow sensor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a liquid flow sensor, this liquid flow sensor have corrosion resistance strong, the characteristics that the leakproofness is good.

An object of the utility model is to provide a liquid supply equipment, this liquid supply equipment uses above-mentioned liquid flow sensor, can effectively improve life.

To achieve the purpose, the utility model adopts the following technical proposal:

a liquid flow sensor comprising:

the liquid inlet pipe and the liquid outlet pipe are arranged on the shell, and the sealing ring is arranged on the shell;

the magnetic field generating assembly comprises an impeller assembly, a plurality of magnets and a first sealing block, the impeller assembly is rotatably connected with the shell, and the first sealing block seals the plurality of magnets on the impeller assembly;

the magnetic field induction assembly is opposite to the magnetic field generation assembly, and both the magnetic field induction assembly and the magnetic field generation assembly are positioned in the shell;

a second sealing block sealing the magnetic field sensing assembly to the housing;

and the signal output assembly is electrically connected with the magnetic field induction assembly.

Preferably, the housing comprises:

the outer periphery of the upper shell is provided with a first clamping tenon;

the lower shell is buckled with the upper shell, and a second clamping tenon is arranged on the periphery of the lower shell and is mutually clamped with the first clamping tenon.

Preferably, the seal ring is disposed between the upper housing and the lower housing.

Preferably, a plurality of the magnets are uniformly distributed at intervals along the circumferential direction of the impeller assembly, and the adjacent magnets have different magnetism.

Preferably, the impeller assembly comprises:

the body is provided with a magnet mounting hole, and the magnet and the first sealing block are arranged in the magnet mounting hole; and

and the blades are arranged on the periphery of the body.

Preferably, the magnetic field induction assembly comprises:

a circuit board disposed on the housing;

and the Hall element is arranged opposite to the magnetic field generating assembly and is electrically connected with the circuit board.

Preferably, the signal output assembly includes:

and the plurality of contact pins are electrically connected with the circuit board.

Preferably, the signal output assembly further comprises:

and the pins are arranged on the pin platform.

Preferably, the pin platform comprises a plurality of buckles, each buckle corresponds to one pin, and the buckles are abutted against the pins so that the pins are fixed with the pin platform.

A liquid supply apparatus comprising a liquid flow sensor as described above.

The beneficial effects of the utility model reside in that:

the utility model discloses a liquid flow sensor. Because first sealed piece seals magnet on impeller subassembly, the sealed subassembly of magnetic field induction is sealed on the shell with the second sealed piece, has avoided liquid and external pollution to the corruption of magnet and magnetic field induction subassembly, has guaranteed the steady operation of magnet and magnetic field induction subassembly, has improved liquid flow sensor's corrosion resistance, has prolonged liquid flow sensor's life. Meanwhile, the sealing ring is arranged on the shell, so that liquid leakage in the shell is prevented, the sealing performance of the liquid flow sensor is enhanced, and the measuring accuracy of the liquid flow sensor is ensured.

The utility model also discloses a supply liquid equipment, through using above-mentioned liquid flow sensor, realized supplying liquid equipment to liquid flow's accurate control, prolonged life simultaneously.

Drawings

Fig. 1 is a schematic structural diagram of a liquid flow sensor provided in an embodiment of the present invention;

fig. 2 is an exploded view of a liquid flow sensor according to an embodiment of the present invention;

fig. 3 is a structural schematic diagram of an upper shell according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a lower housing according to an embodiment of the present invention;

fig. 5 is a cross-sectional view of an impeller assembly provided by an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a magnetic field sensing assembly and a signal output assembly provided in an embodiment of the present invention;

fig. 7 is a schematic structural diagram of the upper housing according to another direction provided by the embodiment of the present invention.

In the figure:

1-a housing; 11-an upper shell; 111-mounting grooves; 112-a groove; 113-a first latch; 12-a lower housing; 121-positioning columns; 122-a rotating shaft; 123-a second tenon; 124-sealing groove; 13-sealing ring; 2-a magnetic field generating assembly; 21-an impeller assembly; 211-a body; 2111-magnet mounting holes; 2112-inserting mounting holes; 212-a blade; 22-a magnet; 23-a first sealing block; 3-a magnetic field induction component; 31-a hall element; 32-a circuit board; 4-a liquid inlet pipe; 5-a liquid outlet pipe; 6-a second sealing block; 7-a signal output component; 71-inserting needle; 72-a needle inserting table; 721-fastening; 722-a bump; 723-needle inserting seat.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The embodiment of the utility model provides a liquid flow sensor, as shown in fig. 1 and fig. 2, this liquid flow sensor includes that shell 1, magnetic field take place subassembly 2, magnetic field response subassembly 3, feed liquor pipe 4, drain pipe 5, the sealed piece of second 6 and signal output subassembly 7. Wherein, magnetic field generation assembly 2 and magnetic field induction assembly 3 set up relatively and both all are located shell 1, and magnetic field generation assembly 2 rotates with shell 1 to be connected, and feed liquor pipe 4 and drain pipe 5 both all set up on shell 1 and both all are linked together with shell 1 is inside, and the sealed piece 6 of second seals magnetic field induction assembly 3 on shell 1, and signal output subassembly 7 is connected with magnetic field induction assembly 3 electricity. Liquid drives magnetic field generation assembly 2 to produce the magnetic field that changes after getting into shell 1 from feed liquor pipe 4, then liquid flows out shell 1 from drain pipe 5, and the change of magnetic field is responded to magnetic field sensing assembly 3 to in the treater of the magnetic signal conversion electric signal through signal output assembly 7 output to the outside with the magnetic signal of magnetic field, realize liquid flow sensor to the monitoring of liquid flow.

Specifically, the casing 1 is provided with the seal ring 13, the magnetic field generating unit 2 includes an impeller unit 21, a plurality of magnets 22, and a first seal block 23, the impeller unit 21 is rotatably connected to the casing 1, and the plurality of magnets 22 are sealed to the impeller unit 21 by the first seal block 23. Because first seal block 23 seals magnet 22 on impeller subassembly 21, second seal block 6 seals magnetic field response subassembly 3 on shell 1, has avoided liquid and external pollution to magnet 22 and magnetic field response subassembly 3's corruption, has guaranteed magnet 22 and magnetic field response subassembly 3's steady operation, has improved liquid flow sensor's corrosion resistance, has prolonged liquid flow sensor's life. Meanwhile, as the sealing ring 13 is arranged on the shell 1, the liquid leakage in the shell 1 is prevented, the sealing performance of the liquid flow sensor is enhanced, and the measuring precision of the liquid flow sensor is ensured.

Preferably, the plurality of magnets 22 are evenly spaced circumferentially along the impeller assembly 21, with adjacent magnets 22 being of different magnetic properties. In the present embodiment, the number of magnets 22 is two. Because a plurality of magnets 22 are evenly distributed along the circumference of the impeller component 21 at intervals, and the magnetism of the adjacent magnets 22 is different, the impeller component 21 has higher magnetic field intensity just facing the region, so that the magnetic field sensing component 3 can sense the change of the magnetic field more easily, and the sensitivity of the liquid flow sensor is improved.

As shown in fig. 2, the housing 1 includes an upper case 11 and a lower case 12, and the upper case 11 is snap-fitted to the lower case 12. Liquid outlet pipe 5 and magnetic field induction component 3 all set up on last casing 11, and liquid inlet pipe 4 and magnetic field generation component 2 set up on casing 12 down. The upper shell 11 and the lower shell 12 are respectively arranged on the shell 1, so that the magnetic field generating assembly 2 is convenient to mount and fix.

In order to make the buckling between the upper housing 11 and the lower housing 12 more firm, as shown in fig. 2-4, the periphery of the upper housing 11 is provided with a first tenon 113, the periphery of the lower housing 12 is provided with a second tenon 123, and the second tenon 123 and the first tenon 113 are mutually clamped. Specifically, the lower surface of the second latch 123 abuts on the upper surface of the first latch 113. When the liquid pressure in the housing 1 increases, the abutting pressure between the first tenon 113 and the second tenon 123 increases, so that the friction between the first tenon 113 and the second tenon 123 increases, the first tenon 113 and the second tenon 123 are clamped more firmly, and the upper shell 11 and the lower shell 12 are more difficult to separate, so that the tolerance range of the liquid flow sensor to the liquid pressure is improved, and the liquid flow sensor can normally work under a higher hydraulic working condition environment.

Preferably, there are a plurality of first tenons 113 and second tenons 123, and a plurality of first tenons 113 equipartitions set up in upper shell 11 periphery circumference, and a plurality of second tenons 123 equipartitions set up in lower shell 12 periphery circumference, and first tenons 113 and second tenons 123 one-to-one correspond, and all second tenons 123 can pass the clearance between first tenon 113 simultaneously. When the upper shell 11 is buckled on the lower shell 12, the second clamping tenon 123 is opposite to the gap between the first clamping tenons 113, the upper shell 11 and the lower shell 12 are pressed oppositely, the second clamping tenon 123 is completely positioned above the first clamping tenon 113, the upper shell 11 and the lower shell 12 are rotated, the lower surface of the second clamping tenon 123 is abutted to the upper surface of the first clamping tenon 113, the second clamping tenon 123 and the first clamping tenon 113 are clamped with each other, and the separation between the upper shell 11 and the lower shell 12 is limited. Because set up a plurality of first tenons 113 and a plurality of second tenons 123 mutual joint one by one, strengthened the fastness of lock between last casing 11 and the lower casing 12, further strengthened liquid flow sensor to liquid pressure's endurance ability.

Preferably, the sealing ring 13 is disposed between the upper case 11 and the lower case 12. Specifically, as shown in fig. 4, a seal groove 124 is provided at an upper end outer edge of the lower case 12, and the seal ring 13 is provided in the seal groove 124. The effect of preventing the liquid leakage of the housing 1 is achieved by the sealing action of the sealing ring 13.

In addition, as shown in fig. 1 and fig. 4, a positioning column 121 is disposed at the bottom of the lower casing 12 to the outside of the outer casing 1, and the positioning column 121 can be inserted into a positioning hole of the device to be detected, so as to facilitate the installation and positioning of the liquid flow sensor.

As shown in fig. 5, the impeller assembly 21 includes a body 211 and a blade 212, the blade 212 is disposed on the body 211, a magnet mounting hole 2111 is opened on the body 211, the magnet 22 is disposed in the magnet mounting hole 2111, and the first sealing block 23 is disposed at an opening of the magnet mounting hole 2111. In this embodiment, the first sealing block 23 is made of epoxy resin. Because the epoxy resin has stronger corrosion resistance, the corrosion of the liquid to the magnet 22 is effectively prevented, the stable work of the magnet 22 is ensured, and the corrosion resistance of the liquid flow sensor is improved.

In addition, as shown in fig. 4 and 5, the body 211 is provided with an insertion mounting hole 2112, the bottom of the lower housing 12 is provided with a rotating shaft 122 inward, the rotating shaft 122 is inserted into the insertion mounting hole 2112, and when the liquid drives the blade 212 to rotate, the impeller assembly 21 rotates around the rotating shaft 122. The rotating shaft 122 is inserted into the insertion mounting hole 2112, so that the impeller assembly 21 is positioned, and meanwhile, the impeller assembly 21 is conveniently connected with the rotating shaft 122 in a rotating manner.

To describe the structure of the magnetic field sensing assembly 3 more clearly, as shown in fig. 2, 6 and 7, the magnetic field sensing assembly 3 includes a circuit board 32 and a hall element 31, wherein the circuit board 32 is disposed on the housing 1, the hall element 31 is electrically connected to the circuit board 32, and the hall element 31 is disposed opposite to the magnetic field generating assembly 2. Specifically, the upper case 11 is provided with a mounting groove 111, the circuit board 32 is disposed in the mounting groove 111, the pins of the hall element 31 are soldered on the circuit board 32, and the pins of the hall element 31 are electrically connected to the signal output assembly 7 through the wires on the circuit board 32. When the impeller assembly 21 is driven by liquid to rotate to generate a rotating magnetic field, the hall element 31 cuts the magnetic induction lines to convert magnetic signals into electric signals, and the electric signals are output to an external processor through the pins, the circuit board 32 and the signal output assembly 7. The liquid flow sensor has sensitive response because the conversion and transmission time delay of the magnetic signal and the electric signal is extremely small.

To describe the structure of the signal output assembly 7 more clearly, as shown in fig. 2 and 7, the signal output assembly 7 includes a plurality of pins 71, the plurality of pins 71 are all electrically connected to the circuit board 32, the number of the pins 71 is the same as that of the pins of the hall element 33, and the hall element 33, the circuit board 32 and the pins 71 form an electrically connected path. The electrical signal from the hall element 33 is output to an external processor via pin 71.

Preferably, in order to prevent the pins 71 from shaking during use, as shown in fig. 1, 2 and 6, the signal output assembly 7 further includes a pin table 72, and the plurality of pins 71 are mounted on the pin table 72. Specifically, the pin base 72 is also mounted in the mounting groove 111, the pin base 72 is provided with pin seats 723 corresponding to the pins 71 one to one, and the plurality of pins 71 are inserted into the pin base 72 through the pin seats 723. Because the pin base 723 limits the shaking space of the contact pin 71, the shaking of the contact pin 71 in the using process is avoided, virtual connection caused by the shaking of the contact pin 71 is prevented, and the stability of the magnetic field induction assembly 3 in transmitting electric signals is improved.

Further, the pin platform 72 includes a plurality of catches 721, each catch 721 corresponds to one pin 71, the catches 721 are disposed on one side of the pin base 723, and the catches 721 are used for fixing the relative positions of the pins 71 and the pin platform 72. When the contact pin 71 is installed, an operator pushes the buckle 721 in a direction back to the contact pin base 723, the buckle 721 resets after the contact pin 71 is installed, the buckle 721 presses the contact pin 71, the side wall of the contact pin 71 presses the contact pin base 723, friction force between the contact pin 71 and the contact pin base 723 is increased, relative movement between the contact pin 71 and the contact pin base 723 is avoided, relative positions of the contact pin 71 and the contact pin table 72 are fixed, the contact pin 71 is prevented from being pulled out when being plugged and pulled for connecting an external processor, and stability of the liquid flow sensor is improved.

In addition, as shown in fig. 6 and 7, a protrusion 722 is disposed on the side surface of the needle bed 72, a groove 112 corresponding to the protrusion 722 is disposed on the side wall of the mounting groove 111, and the protrusion 722 can be engaged with the groove 112. When the needle inserting table 72 needs to be installed, the needle inserting table 72 needs to be pressed into the installation groove 111 by external force, so that the protrusion 722 is clamped in the groove 112, the needle inserting table 72 is firmly clamped in the installation groove 111, and the relative position of the needle inserting table 72 and the upper shell 11 is fixed.

It should be noted that the second sealing block 6 is made of a hot melt adhesive material, the second sealing block 6 is formed by low-pressure injection molding, the lower ends of the hall element 31, the circuit board 32 and the contact pin 71 are placed in the mounting groove 111 of the housing 1 according to preset positions, then the hot melt adhesive is injected into the mounting groove 111 at low pressure, after the hot melt adhesive is solidified, the relative positions of the hall element 31, the circuit board 32 and the contact pin 71 are fixed, and the solidified hot melt adhesive is the second sealing block 6. Because the hot melt adhesive has good corrosion resistance, the second sealing block 6 can protect the lower ends of the hall element 31, the circuit board 32 and the contact pin 71 from being corroded by liquid and external pollutants, so that the stable operation of the magnetic field induction assembly 3 is ensured, and the service life of the liquid flow sensor is prolonged.

Preferably, the bottom of lower casing 12 still is provided with reference column 121, and reference column 121 can peg graft in the equipment of examining to make things convenient for liquid flow sensor's installation location.

For the convenience of the reader to understand, the working principle of the utility model is as follows:

liquid enters the shell 1 from the liquid inlet pipe 4 on the lower shell 12 and then flows out of the shell 1 from the liquid outlet pipe 5, in the process, the liquid pushes the blades 212 of the impeller assembly 21, the blades 212 rotate the body 211 of the impeller assembly 21, thereby driving the plurality of magnets 22 installed on the body 211 to rotate, the magnetic field generated by the plurality of magnets 22 also rotates, since the hall element 31 is disposed opposite the magnetic-field generating assembly 2 and the hall element 31 is stationary with respect to the housing 1, the hall element 31 thus cuts the magnetic sense wire, producing a varying current, which is conducted from the legs of the hall element 31 to the circuit board 32 to the pins 71 and then out to the external processor, the larger the flow of liquid in unit time is, the shorter the change period of current is, on the contrary, the smaller the liquid flow is, the longer the change period of current is, thereby realizing the monitoring of liquid flow by the liquid flow sensor.

Furthermore, the embodiment of the utility model provides a still provide a liquid supply equipment, this liquid supply equipment has realized the accurate control of liquid supply equipment to liquid flow through using above-mentioned liquid flow sensor, has prolonged life simultaneously.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims (10)

1. A liquid flow sensor, comprising:

the liquid-feeding type liquid-discharging device comprises a shell (1), wherein a liquid inlet pipe (4) and a liquid outlet pipe (5) are arranged on the shell (1), and a sealing ring (13) is arranged on the shell (1);

the magnetic field generating assembly (2) comprises an impeller assembly (21), a plurality of magnets (22) and a first sealing block (23), wherein the impeller assembly (21) is rotatably connected with the shell (1), and the first sealing block (23) seals the plurality of magnets (22) on the impeller assembly (21);

the magnetic field induction assembly (3) is arranged opposite to the magnetic field generation assembly (2) and both are positioned in the shell (1);

a second sealing block (6), said second sealing block (6) sealing said magnetic field sensing assembly (3) on said housing (1);

and the signal output assembly (7) is electrically connected with the magnetic field induction assembly (3).

2. The liquid flow sensor according to claim 1, wherein the housing (1) comprises:

an upper housing (11) provided with a first latch (113) at the outer periphery thereof;

lower casing (12), with go up casing (11) and detain mutually, the periphery of lower casing (12) is provided with second trip (123), second trip (123) with first trip (113) joint each other.

3. The liquid flow sensor according to claim 2, wherein the sealing ring (13) is disposed between the upper housing (11) and the lower housing (12).

4. The fluid flow sensor according to claim 1, wherein a plurality of the magnets (22) are uniformly spaced along a circumferential direction of the impeller assembly (21), and adjacent magnets (22) have different magnetic properties.

5. The liquid flow sensor of claim 1, wherein the impeller assembly (21) comprises:

the body (211) is provided with a magnet mounting hole (2111), and the magnet (22) and the first sealing block (23) are arranged in the magnet mounting hole (2111); and

and a blade (212) provided on the outer periphery of the body (211).

6. The liquid flow sensor according to claim 1, wherein the magnetic field sensing assembly (3) comprises:

a circuit board (32) disposed on the housing (1);

and the Hall element (31) is arranged opposite to the magnetic field generating assembly (2), and the Hall element (31) is electrically connected with the circuit board (32).

7. The liquid flow sensor according to claim 6, wherein the signal output assembly (7) comprises:

a plurality of pins (71) each electrically connected to the circuit board (32).

8. The liquid flow sensor according to claim 7, wherein the signal output assembly (7) further comprises:

and a pin table (72), wherein the pins (71) are mounted on the pin table (72).

9. The liquid flow sensor according to claim 8, wherein said pin table (72) comprises a plurality of catches (721), each of said catches (721) corresponding to one of said pins (71), said catches (721) abutting said pin (71) to fix said pin (71) to said pin table (72).

10. A liquid supply apparatus comprising the liquid flow sensor of any one of claims 1-9.

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