CN215832815U - Floating ball liquid level sensing device - Google Patents

Abstract

The utility model relates to the technical field of liquid level sensing devices, in particular to a floating ball liquid level sensing device which comprises an electronic element, a supporting rod, a floating ball and a shielding shell, wherein one end of the supporting rod is fixedly connected with a connecting disc, the other end of the supporting rod is closed and fixedly connected with a limiting part, a protective shell and a top cover fixedly connected with the protective shell are arranged outside the electronic element, a groove is formed in the bottom of the protective shell, and the connecting disc is clamped inside the groove; the shielding shell comprises a shielding sleeve, a shielding cover, a shielding pipe and a fixed disc, wherein a closed cavity for accommodating the electronic element is formed in the shielding shell after the shielding sleeve, the shielding cover, the shielding pipe and the fixed disc are mutually and tightly connected. The floating ball liquid level sensing device is convenient to assemble, stable in structure and sensitive in liquid level sensing, and can effectively solve the technical problems that the existing liquid level sensing device is easily interfered by electromagnetic interference to reduce the measurement precision, a signal lamp has a visual blind area, an electronic wiring plug is not stable to install, different welding tools need to be manufactured for different process installation interfaces and the like.

Description

Floating ball liquid level sensing device

Technical Field

The utility model relates to the technical field of liquid level sensing devices, in particular to a floating ball liquid level sensing device.

Background

Liquid level control is a common process control in industry, and the influence on production cannot be ignored. The liquid level meter is an instrument for measuring liquid level, and the liquid level meters on the market at present mainly comprise a magnetic floating ball type, a pressure type, a tuning fork vibration type, a capacitance type, ultrasonic waves, sonar waves and the like. The floating ball liquid level meter utilizes the floating ball to float on the water surface, and along with the rise and fall of the water level, the floating ball liquid level meter is mutually coupled with an internal magnetic induction circuit through the magnet inside the floating ball, so that the water level is measured. The tool can accurately measure the position of the liquid level by utilizing the Vieman effect of the material and generating a strain pulse signal through the intersection of two different magnetic fields. The floating ball liquid level meter has the advantages of high precision, wide measuring range, strong environmental adaptability, convenient installation and the like, and is widely applied to the liquid level measurement and control of various liquid tanks such as petroleum, chemical raw material storage, medicines, food and beverage, dam water level monitoring, industrial processes, gas station underground stock and the like.

Among the prior art, the floater level gauge mainly includes electronic component, bracing piece, floater and process installation interface (like all kinds of flanges or screw thread), adopts the structural design of integral type mostly, when needs use certain flange mounting, must process the welding with the flange of this type, and the preparation frock, the preparation degree of difficulty is great, uses the maintenance cost height moreover. Meanwhile, in an actual detection environment, other electronic devices such as a pump, a motor and an interphone may exist around the floating ball liquid level meter, and electromagnetic waves or radio frequency signals emitted by the electronic devices interfere with a sensor of the floating ball liquid level meter, so that deviation of liquid level measurement data occurs, and detection accuracy of the liquid level meter is affected. In addition, the electronic element of the floating ball liquid level meter is usually connected with an external circuit through an electronic wiring plug inserted on a liquid level meter shell, and the traditional electronic wiring plug has some problems, so that the floating ball liquid level meter is not easy to glue during installation, is easy to fall off and has poor fixing performance. In addition, can set up the condition that the liquid level was reminded to the warning light among the current floater level gauge, but set up in one side usually, have the vision blind area, inconvenient operation monitoring personnel observes and in time reacts in other position.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides the floating ball liquid level sensing device which is convenient to assemble and stable in structure, the standardized connecting disc is convenient to adapt to different process mounting structures such as flanges and threads with various specifications, meanwhile, different types of products such as a floating ball liquid level meter, a magnetic resistance liquid level meter and a magnetic control switch can be realized by replacing internal electronic elements, and the technical problems that the existing floating ball liquid level sensing device cannot realize standardized process mounting, is easily interfered by surrounding electronic equipment signals, so that the measuring precision of the liquid level meter is inaccurate, a signal lamp has a vision blind area, an electronic wiring plug is not easy to be coated with glue, and the mounting is not stable and the like can be effectively solved.

In order to solve the technical problem, the technical scheme of the utility model is realized by the following modes:

a floating ball liquid level sensing device comprises an electronic element, a hollow supporting rod, a floating ball sleeved outside the supporting rod and an internal shielding shell, wherein one end of the supporting rod is fixedly connected with a connecting disc, the other end of the supporting rod is closed and fixedly connected with a limiting part, a protective shell and a top cover fixedly connected with the protective shell are arranged outside the electronic element, a groove is formed in the bottom of the protective shell, and the connecting disc is clamped inside the groove; the shielding shell comprises a shielding sleeve, a shielding cover covering the shielding sleeve, a shielding pipe arranged in the supporting rod and a fixing plate arranged at the top of the shielding pipe, wherein the shielding cover, the shielding pipe and the fixing plate are mutually tightly connected, and then a closed cavity for accommodating the electronic element is formed in the shielding pipe.

Through above-mentioned technical scheme, design into detachable connected mode with connection pad and protective housing, because adopt special welded technique between connection pad and the bracing piece, need make corresponding frock during the welding, be favorable to being equipped with electronic component's protective housing with connection pad adaptation in different models through standardized connection pad, also be favorable to on the process connection structure of connection pad adaptation in various kinds, like flange, screw thread etc. improved the convenience and the flexibility that the connection pad used. The shielding shell is arranged inside the protective shell and the supporting rod, so that electromagnetic signals of electronic equipment around the liquid level meter can be shielded, the liquid level meter is prevented from being interfered by external electromagnetic signals during working, and the measuring accuracy of the liquid level meter is ensured.

Furthermore, the shielding shell is made of metal, the shielding sleeve is arranged between the electronic element and the protective shell, and the shielding cover is covered between the shielding sleeve and the top cover to completely cover the electronic element from being interfered by external signals; the bottom end of the shielding pipe is closed and is mutually abutted against the closed end of the supporting rod, and the bottom surface of the fixed disc is mutually abutted against the inner bottom surface of the protective shell, so that the airtightness is improved, and the shielding effect is enhanced; the side surface of the protective shell is provided with a plug mounting port communicated with the outside, and the shielding sleeve is provided with a line interface corresponding to the plug mounting port in position, so that the external line can be conveniently accessed.

Furthermore, plug installing port internally mounted has the electron wiring plug, the electron wiring plug includes insulating casing and the inside fixed conductive post that leads, insulating casing is wholly cylindricly, insulating casing is close to electronic component's one end is provided with the concave groove and is used for installing the sealing washer, insulating casing keeps away from electronic component's one end is provided with the flange of outside extension, and concave groove with between the flange be provided with the protruding edge of step on insulating casing's the side.

Through the technical scheme, the concave groove is formed, and the sealing ring is arranged in the concave groove, so that the sealing performance is improved, and the waterproof and moistureproof effects are achieved; through setting up the protruding edge of step, paint glue on the front end lateral wall of electron wiring plug, with the inside time of electron wiring plug insert plug installing port, because there is the protruding edge of step to block, glue can not be extruded the plug installing port completely, and then has improved the installation steadiness of electron wiring plug, dampproofing and waterproofing can also prevent to drop.

Further, the conductive column includes a power line positive electrode interface and a power line negative electrode interface, a signal line positive electrode interface and a signal line negative electrode interface, which are arranged in an equi-circumferential symmetrical manner, and a shielding ground wire interface arranged at a circle center position.

Further, set up LED lamp and cyclic annular leaded light strip on protective housing's the medial surface, the LED lamp is installed on the cyclic annular leaded light strip, when the LED lamp scintillation, light shines on cyclic annular leaded light strip, and operating personnel can both see light scintillation around the level gauge.

Furthermore, the LED lamp is installed inside the shielding sleeve, a circle of light holes are formed in the side wall of the shielding sleeve at intervals, and the light holes correspond to the plane positions of the LED lamp. When the LED lamp flickers, the light can penetrate through the light holes in the side wall of the shielding sleeve, and the flicker of the light can be observed at each side position of the liquid level meter by an operator.

Further, be provided with the light trap on the shield cover, be equipped with cyclic annular leaded light strip on the medial surface of protecting sheathing, leaded light strip, light trap and the LED lamp three of installing on electronic component set up with the plane.

Through above-mentioned technical scheme, when the LED lamp scintillation, light can pass the light trap and shine on the leaded light strip that the ring was established on the protective housing medial surface, and operating personnel can both see light scintillation around the level gauge and remind, has avoided the vision blind area, can remind in time to make a response to light.

Further, the inside of connection pad is provided with the internal thread inserts, protective housing's bottom is provided with the through-hole, be provided with the mounting hole on the fixed disk, the internal thread inserts the mounting hole with the through-hole three position corresponds each other for the installation mounting will connection pad, fixed disk and protective housing three carry out fixed connection, the outer lane of connection pad is provided with the ring channel, install the sealing washer of elastic material in the ring channel, further improve the leakproofness of hookup location.

Further, the floater can be followed the bracing piece slides from top to bottom, the transversal ring of personally submitting of floater, be provided with the annular cavity between the medial surface of floater and the lateral surface, the inside draw-in groove that is provided with of annular cavity, the internally mounted of draw-in groove has permanent magnet, permanent magnet symmetry sets up and homopolar end is inside. The floating ball can move up and down along the support rod along with the change of the liquid level, and the position of the liquid level is measured by the magnetic induction reaction between a magnetic field generated by the permanent magnet in the floating ball and the electronic element.

Furthermore, the outside of protective housing is provided with the installation nut for with floater liquid level induction system fixed mounting on the device that needs the measurement liquid level.

Compared with the prior art, the floating ball liquid level sensing device provided by the utility model has the following beneficial effects:

the floating ball liquid level sensing device realizes a standardized installation form by arranging the connecting disc, and the connecting disc can be installed in different installation modes such as flanges, threads and the like as long as corresponding grooves are processed, so that the phenomenon that a corresponding welding tool needs to be manufactured every time a process connection occurs is avoided; the shielding shell is arranged outside the electronic element, so that the interference of electromagnetic signals of surrounding electronic equipment can be avoided, and the accuracy of liquid level measurement is improved; by arranging the light-transmitting window, the light-transmitting hole or the light guide strip and the like, a visual blind area caused by the flickering of the LED signal lamp is avoided, and the staff can see the light flickering in time to perform corresponding operation; through set up the protruding edge of step on electron wiring plug lateral wall, be favorable to improving the kiss-coating performance, further improve the steadiness of leakproofness and installation. The floating ball liquid level sensing device is convenient and flexible to install, simple to maintain, safe and reliable, strong in anti-interference capability and sensitive in liquid level sensing, is suitable for liquid level measurement of various tanks, grooves and spherical containers, and does not influence production in the installation process.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a cross-sectional view of a float level sensing device according to the present invention;

FIG. 2 is a perspective view of the protective enclosure of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 1 at "A";

FIG. 4 is a side elevational view of the electrical connector plug of the present invention;

fig. 5 is a schematic arrangement diagram of the conductive pillars in the present invention;

FIG. 6 is a partial structural view of embodiment 2 of the present invention;

fig. 7 is a schematic structural view of a shield case in embodiment 3 of the present invention.

In the figure: 1-electronic element, 11-LED lamp, 2-support rod, 21-connecting disc, 211-internal thread insert, 212-annular groove, 213-sealing ring, 22-limiting piece, 3-floating ball, 31-annular cavity, 32-clamping groove, 33-permanent magnet, 4-shielding shell, 41-shielding sleeve, 411-line interface, 412-light-transmitting window, 413-light-transmitting hole, 42-shielding cover, 43-shielding tube, 44-fixed disc, 441-mounting hole, 5-protective shell, 51-groove, 52-light-guiding strip, 53-through hole, 6-top cover, 7-plug mounting hole, 8-electronic wiring plug, 81-insulating shell, 811-concave groove, 812-flange, 813-step convex edge, 82-conductive column, 821-positive power line interface, 822-negative power line interface, 823-positive signal line interface, 824-negative signal line interface, 825-shielding ground line interface and 9-mounting nut.

Detailed Description

The preferred embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it should be understood that the embodiments described herein are merely for purposes of illustration and explanation, and are not intended to limit the utility model.

Example 1

As shown in fig. 1, the floating ball liquid level sensing device provided by the utility model comprises an electronic element 1, a hollow support rod 2, a floating ball 3 and a shielding shell 4, wherein the floating ball 3 and the shielding shell are sleeved outside the support rod 2, one end of the support rod 2 is fixedly connected with a connecting disc 21, an annular groove 212 is arranged on the outer ring of the connecting disc 21, and a rubber sealing ring 213 is arranged in the annular groove 212. The other end of the supporting rod 2 is closed and fixedly connected with the limiting member 22, the protective housing 5 and the top cover 6 fixedly connected with the protective housing 5 are arranged outside the electronic element 1, as shown in fig. 2, a groove 51 is arranged at the bottom of the protective housing 5, and the connecting disc 21 is clamped inside the groove 51. The exterior of the protective housing 5 is provided with a mounting nut 9 for fixedly mounting the gauge on a device for which a level is to be measured. The connecting disc and the protective shell are detachably connected, the designed connecting disc can be matched with protective shells which are provided with electronic elements and have different models, and universality and flexibility of the connecting disc are improved. As shown in fig. 1, an internal thread insert 211 is disposed inside the connection disc 21, a through hole 53 is disposed at the bottom of the protective housing 5, and a mounting hole 441 is disposed on the fixing disc 44, wherein the internal thread insert 211, the mounting hole 441, and the through hole 53 are corresponding to each other for mounting a fixing member to fixedly connect the connection disc 21, the fixing disc 44, and the protective housing 5.

As shown in fig. 1, the shielding shell 4 is made of metal, and includes a shielding sleeve 41, a shielding cover 42 covering the shielding sleeve 41, a shielding tube 43 installed inside the supporting rod 2, and a fixing plate 44 disposed on the top of the shielding tube 43. The shielding shell can shield electromagnetic signals of electronic equipment around the liquid level meter, so that the liquid level meter is prevented from being interfered by external signals when in working, and the measuring accuracy of the liquid level meter is ensured. The shielding sleeve 41 is arranged between the electronic component 1 and the protective shell 5, the shielding cover 42 is covered between the shielding sleeve 41 and the top cover 6, the bottom end of the shielding tube 43 is closed and is abutted against the closed end of the supporting rod 2, the bottom surface of the fixed disk 44 is abutted against the inner bottom surface of the protective shell 5, the side surface of the protective shell 5 is provided with a plug mounting port 7 communicated with the outside, and the shielding sleeve 41 is provided with a line interface 411 corresponding to the plug mounting port 7.

As can be seen from fig. 1, fig. 3 and fig. 4, the electronic wiring plug 8 is installed inside the plug installation opening 7, the electronic wiring plug 8 includes an insulating housing 81 and an internal fixed conductive column 82, the insulating housing 81 is integrally cylindrical, and a concave groove 811 is formed at one end of the insulating housing 81 close to the electronic component 1 for installing a sealing ring, so that the sealing performance is improved, and the waterproof and moistureproof performance is improved. An end of the insulating housing 81 remote from the electronic component 1 is provided with an outwardly extending flange 812, and a stepped ledge 813 is provided on the side of the insulating housing 81 between the concave groove 811 and the flange 812. When inserting electron wiring plug 8 inside plug installing port 7, often paint glue on the front end lateral wall of electron wiring plug 8, because there is the protruding edge 813 of step to block, glue can not be extruded plug installing port 7 completely, and then improves the installation steadiness of electron wiring plug, and dampproofing and waterproofing can also prevent to drop. The outer surface of the plug mounting port 7 is provided with external threads for fixedly connecting an external wiring port. As shown in fig. 5, the conductive pillar 82 includes a power line positive interface 821 and a power line negative interface 822, a signal line positive interface 823 and a signal line negative interface 824, which are arranged in an equi-circumferential symmetrical manner, and a shielding ground line interface 825 disposed at a circle center position.

As shown in fig. 1, the light-transmitting window 412 is disposed on the shielding case 41, the annular light guide strip 52 is annularly disposed on the inner side surface of the protective housing 5, and the light guide strip 52, the light-transmitting window 412 and the LED lamp 11 mounted on the electronic component 1 are disposed on the same plane. When the LED lamp twinkles, light can pass the printing opacity window and shine on the leaded light strip that the ring was established on the protective housing medial surface, and operating personnel can both see light scintillation around the level gauge and remind, has avoided the vision blind area, can remind in time to react to light.

The floating ball 3 can slide up and down along the support rod 2, the cross section of the floating ball 3 is in a circular ring shape, an annular cavity 31 is arranged between the inner side face and the outer side face of the floating ball 3, a clamping groove 32 is arranged inside the annular cavity 31, four permanent magnets 33 are arranged inside the clamping groove 32, and the permanent magnets 33 are symmetrically arranged and have inward homopolar ends. When the liquid level meter works, the floating ball 3 moves up and down along the support rod 2 along with the change of the liquid level, when a magnetic field generated by the permanent magnet in the floating ball 3 is mutually coupled with a magnetic induction circuit in the electronic element 1 to generate magnetic induction reaction, and the position change of the liquid level is accurately sensed by utilizing the Vieman effect of a material and generating a strain pulse signal through the intersection of two different magnetic fields.

Example 2

The basic structure of the floating ball liquid level sensing device provided by the embodiment is the same as that of the embodiment 1, and the difference is that:

as shown in fig. 6, the light-transmitting window is not provided on the shielding case 41, a ring of annular light guide strips 52 is provided around the inner side surface of the protective housing 5, and the LED lamp 11 is provided on the annular light guide strips 52. When the LED lamp twinkles, light shines on annular leaded light strip 52, and operating personnel can both see the light scintillation around the level gauge, has reduced the vision blind area.

Example 3

The basic structure of the floating ball liquid level sensing device provided by the embodiment is the same as that of the embodiment 1, and the difference is that:

as shown in fig. 7, the shielding case 41 is not provided with a light-transmitting window, a circle of light-transmitting holes 413 are arranged on the side wall of the shielding case 41 at intervals, and the light-transmitting holes 413 correspond to the planar position of the LED lamp 11 installed inside the shielding case 41. When the LED lamp flickers, the light can penetrate through the light holes in the side wall of the shielding sleeve 41, the light flickers can be observed at each side position of the liquid level meter by an operator, the visual blind area is avoided, and the LED lamp can remind the operator to make a response in time.

The electronic element in the floating ball liquid level sensing device is not limited to be only provided with a magnetostrictive element, and the device is used as a floating ball magnetostrictive liquid level meter; the electronic element can also be a magnetic resistance element, and the device is used as a floating ball magnetic resistance liquid level meter; the electronic element can be installed as a magnetic control switch instead, and the device can be used as a floating ball liquid level inductive switch.

Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the utility model as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The floating ball liquid level sensing device is characterized by comprising an electronic element (1), a hollow supporting rod (2), a floating ball (3) sleeved outside the supporting rod (2) and an internal shielding shell (4), wherein one end of the supporting rod (2) is fixedly connected with a connecting disc (21), the other end of the supporting rod (2) is sealed and fixedly connected with a limiting part (22), a protective shell (5) and a top cover (6) fixedly connected with the protective shell (5) are arranged outside the electronic element (1), a groove (51) is formed in the bottom of the protective shell (5), and the connecting disc (21) is clamped inside the groove (51); the shielding shell (4) comprises a shielding sleeve (41), a shielding cover (42) covering the shielding sleeve (41), a shielding pipe (43) arranged inside the supporting rod (2) and a fixed disc (44) arranged at the top of the shielding pipe (43), wherein the shielding cover (42), the shielding pipe (43) and the fixed disc (44) are mutually tightly connected and then are internally formed to contain the electronic element (1).

2. The floating ball liquid level sensing device according to claim 1, wherein the shielding shell (4) is made of metal, the shielding sleeve (41) is arranged between the electronic component (1) and the protective shell (5), the shielding cover (42) is sealed between the shielding sleeve (41) and the top cover (6), the bottom end of the shielding pipe (43) is closed and is abutted against the closed end of the supporting rod (2), the bottom surface of the fixed disk (44) is abutted against the inner bottom surface of the protective shell (5), a plug mounting port (7) communicated with the outside is arranged on the side surface of the protective shell (5), and a line interface (411) corresponding to the plug mounting port (7) is arranged on the shielding sleeve (41).

3. The floating ball liquid level sensing device according to claim 2, wherein an electronic wiring plug (8) is mounted inside the plug mounting port (7), the electronic wiring plug (8) comprises an insulating shell (81) and an internally fixed conductive post (82), the insulating shell (81) is integrally cylindrical, a concave groove (811) is formed in one end, close to the electronic element (1), of the insulating shell (81) and used for mounting a sealing ring, an outward extending flange (812) is formed in one end, far away from the electronic element (1), of the insulating shell (81), and a step convex edge (813) is formed in the side face, between the concave groove (811) and the flange (812), of the insulating shell (81).

4. The floating ball liquid level sensing device according to claim 3, wherein the conductive pillar (82) comprises a power line positive interface (821), a power line negative interface (822), a signal line positive interface (823), a signal line negative interface (824) and a shielding ground line interface (825) arranged at a circle center position, which are arranged in an equal-circumference symmetrical manner.

5. The floating ball liquid level sensing device according to claim 1, wherein an LED lamp (11) and an annular light guide bar (52) are arranged on the inner side surface of said protective shell (5), and said LED lamp (11) is installed on said annular light guide bar (52).

6. The floating ball liquid level sensing device according to claim 1, wherein an LED lamp (11) is installed inside the shielding sleeve (41), a circle of light holes (413) are arranged on the side wall of the shielding sleeve (41) at intervals, and the light holes (413) correspond to the plane position of the LED lamp (11).

7. The floating ball liquid level sensing device according to claim 1, wherein a light transmission window (412) is arranged on said shielding sleeve (41), an annular light guide strip (52) is arranged on the inner side surface of said protective shell (5), and said light guide strip (52), said light transmission window (412) and said LED lamp (11) mounted on said electronic component (1) are arranged in the same plane.

8. The floating ball liquid level sensing device according to claim 1, wherein an internal thread insert (211) is arranged inside the connecting disc (21), a through hole (53) is formed in the bottom of the protective shell (5), a mounting hole (441) is formed in the fixed disc (44), the internal thread insert (211), the mounting hole (441) and the through hole (53) correspond to each other in position and are used for fixedly connecting the connecting disc (21), the fixed disc (44) and the protective shell (5) through mounting and fixing pieces, an annular groove (212) is formed in the outer ring of the connecting disc (21), and a sealing ring (213) made of elastic material is arranged in the annular groove (212).

9. The floating ball liquid level sensing device according to claim 1, wherein the floating ball (3) can slide up and down along the support rod (2), the cross section of the floating ball (3) is circular, an annular cavity (31) is arranged between the inner side surface and the outer side surface of the floating ball (3), a clamping groove (32) is arranged in the annular cavity (31), a permanent magnet (33) is arranged in the clamping groove (32), and the permanent magnet (33) is symmetrically arranged and has inward homopolar ends.

10. Floating ball liquid level sensing device according to claim 1, characterized in that the outside of said protective shell (5) is provided with a mounting nut (9) for fixedly mounting the floating ball liquid level sensing device on the device requiring liquid level measurement.

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