Liquid level transmitting controller

Abstract

The utility model discloses a liquid level transmitting controller, which relates to the technical field of liquid level measurement and comprises a display control unit, a liquid level transmitting unit and a liquid level transmitting unit, the bottom surface of the connection socket is provided with a contact groove; a contact head is arranged at the upper end of the detection rod, and the contact head is electrically connected with the display control circuit board after being correspondingly inserted into the contact groove; the floater is arranged outside the detection rod in a sliding mode in the axial direction, two wires are arranged in the detection rod, the floater extrudes the two wires when sliding on the detection rod, the two wires make contact with each other at the extrusion position, and the display control circuit board determines the liquid level height according to the contact position of the wires. The floater extrudes the wire, the display control circuit board determines the liquid level height according to the contact position of the wire, and the detection precision is high; after the two wires are adopted, the connection between the detection rod and the display control unit can be realized through the contact head and the contact groove, so that not only is the resource occupation of the display control circuit board reduced, but also the possibility of faults is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of liquid level measurement, and in particular to a liquid level transmitter controller. Background Art

[0002] The liquid level transmitter, also known as the liquid level sensor, is a commonly used sensor in industrial production. It senses the height of the liquid level in the container and generates an electrical signal corresponding to the liquid level. The host computer can obtain the real-time liquid level by identifying the electrical signal, thereby providing accurate data for production control.

[0003] Generally speaking, a liquid level transmitter controller has a detection part and a transmission part. The detection part is located in the liquid and produces a corresponding state change according to the liquid level height, and the transmission part converts the state of the detection part into a corresponding electrical signal. For example, CN212378852U provides a high-voltage magnetic induction liquid level transmitter controller, whose signal display module and liquid level test module are both designed to withstand high voltage, and the signal display module and liquid level test module adopt a separable structure.

[0004] However, the above patent uses multiple magnetic induction switches to generate actions corresponding to the liquid level height, so the number of magnetic induction switches directly determines the accuracy of liquid level detection. The more magnetic induction switches there are, the higher the accuracy of liquid level detection. However, when there are too many magnetic induction switches, the resource occupation of the intelligent display and control circuit unit is very serious, and the connection structure of the signal display module and the liquid level test module is also very complicated, which greatly increases the cost and failure rate of the liquid level transmitter controller. Utility Model Content

[0005] The embodiment of the present application provides a liquid level transmitter controller to solve the problem of serious circuit resource occupation and complex connection structure in the prior art of using a magnetic induction switch to detect the liquid level.

[0006] The embodiment of the present application provides a liquid level transmitter controller, including:

[0007] A display control unit, which is provided with a display screen and a cable socket, and a display control circuit board is provided inside the display control unit, and the display control circuit board is electrically connected to the display screen and the cable socket respectively;

[0008] A connection socket is fixedly arranged at the bottom of the display and control unit, and two contact grooves are arranged on the bottom surface of the connection socket;

[0009] A detection rod, the upper end of the detection rod is provided with a connection plug, the top surface of the connection plug is provided with two contact heads, the position of each contact head corresponds to a contact slot, after the connection plug is connected to the connection socket, the two contact heads are correspondingly inserted into the two contact slots, so that the contact heads are electrically connected to the display and control circuit board through the contact slots;

[0010] The float is axially slidably arranged on the outside of the detection rod. The detection rod is a hollow structure. Two wires are arranged inside the detection rod. The two wires are electrically connected to two contact heads respectively. When the float slides on the detection rod, the two wires are squeezed. The two wires are in contact at the squeezed position. The display and control circuit board determines the liquid level height according to the contact position of the wires.

[0011] In one possible implementation, the contact groove is annular, and the two annular contact grooves are both centered on the bottom center of the connecting socket, and the two contact grooves have different radii, and the distance between the two contact heads and the top center of the connecting plug is the same as the radius of the two contact grooves.

[0012] In a possible implementation, a contact layer is laid on the inner side of the contact groove, the contact layer is electrically connected to the display and control circuit board, and the contact head contacts the contact layer after being inserted into the contact groove.

[0013] In a possible implementation, the outer side surface of the connecting plug has an external thread, the inner side surface of the connecting socket has an internal thread, and the connecting plug is screwed to the connecting socket through the matching of the external thread and the internal thread.

[0014] In one possible implementation, an elastic diaphragm is provided on the outer side of the detection rod, two wires are respectively provided at relative positions on the inner side of the diaphragm, a protrusion structure is provided on the outer side of the inner hole of the float, the inner hole is slidably sleeved on the outside of the diaphragm, the protrusion structure applies extrusion pressure to the diaphragm and the wires, causing the wires to undergo elastic deformation, thereby making the two wires contact.

[0015] In one possible implementation, the detection rod is provided with axially extending slide grooves at two relative positions on the outer surface, the diaphragm is located at the junction of the slide groove and the isolation cavity inside the detection rod, the outer surface of the inner hole has a slider matching the slide groove, and the protruding structure is located on the side of the slider facing the diaphragm.

[0016] In a possible implementation, the gravity of the float and the buoyancy of the float in the liquid are both greater than the friction between the protruding structure and the diaphragm.

[0017] In a possible implementation, a connection seat is provided near the upper end of the detection rod, a plurality of connection holes are provided on the connection seat, and the connection seat is used to install the detection rod on the container.

[0018] In a possible implementation, the display screen is disposed on a front cover plate, and the front cover plate is detachably mounted on a front side surface of the display and control unit.

[0019] A liquid level transmitter controller in this application has the following advantages:

[0020] Two wires are arranged inside the detection rod. When the float slides on the detection rod, the wires will be squeezed. The wires touch at the squeezed position to form an electrical circuit. The display and control circuit board determines the contact position according to the current on the wires, and then determines the liquid level height, with high detection accuracy. Moreover, after using two wires, the connection between the detection rod and the display and control unit can be achieved through two contact heads and two contact slots, which not only reduces the resource occupation of the chip on the display and control circuit board, but also the connection structure is very simple, greatly reducing the possibility of failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the external structure of a liquid level transmitter controller provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of the disassembled state of the display and control unit in the liquid level transmitter controller provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of a partial cross-sectional structure of a float and a detection rod provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of a partial structure of a connecting plug provided in an embodiment of the present application;

[0026] Figure 5 A schematic diagram of the partial structure of the connection socket provided in an embodiment of the present application.

[0027] Explanation of the accompanying drawings: 100, display and control unit; 101, front cover; 110, cable socket; 120, display screen; 130, display and control circuit board; 200, connection socket; 210, contact slot; 300, detection rod; 301, slide slot; 302, diaphragm; 303, wire; 304, isolation chamber; 310, connection plug; 311, contact head; 320, connection seat; 321, connection hole; 400, float. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] Figures 1-5 This is a schematic diagram of the structure of a liquid level transmitter controller provided in an embodiment of the present application. This embodiment of the present application provides a liquid level transmitter controller, including:

[0030] A display control unit 100, on which a display screen 120 and a cable socket 110 are disposed, and a display control circuit board 130 is disposed inside the display control unit 100, and the display control circuit board 130 is electrically connected to the display screen 120 and the cable socket 110 respectively;

[0031] The connection socket 200 is fixedly arranged at the bottom of the display and control unit 100, and two contact grooves 210 are arranged on the bottom surface of the connection socket 200;

[0032] A detection rod 300, wherein a connection plug 310 is disposed at the upper end of the detection rod 300, and two contact heads 311 are disposed on the top surface of the connection plug 310, and the position of each contact head 311 corresponds to a contact slot 210. After the connection plug 310 is connected to the connection socket 200, the two contact heads 311 are correspondingly inserted into the two contact slots 210, so that the contact heads 311 are electrically connected to the display control circuit board 130 through the contact slots 210;

[0033] The float 400 is axially slidably arranged on the outside of the detection rod 300. The detection rod 300 is a hollow structure. Two wires 303 are arranged inside the detection rod 300. The two wires 303 are electrically connected to two contact heads 311 respectively. When the float 400 slides on the detection rod 300, the two wires 303 are squeezed. The two wires 303 are in contact at the squeezed position. The display and control circuit board 130 determines the liquid level height according to the contact position of the wires 303.

[0034] Exemplarily, the display screen 120 can be a liquid crystal display screen or a digital tube, which is used to display the liquid level height data processed by the display control circuit board 130. The display control circuit board 130 is provided with a processing chip and a power supply chip. The processing chip can adopt a single-chip microcomputer of the STM32 series. The analog-to-digital conversion pin of the processing chip is connected to two wires 303. The power supply chip can adopt AH8651, which can convert the 220V power input through the cable socket 110 into 3.3V power and 5V power. The 3.3V power among them is used to supply power to the processing chip and the display screen 120, while the 5V power is used to supply power to one wire 303. When the wire 303 is not squeezed by the float 400, the two wires 303 do not contact, and thus there is no electrical circuit. At this time, no current is input to the analog-to-digital conversion pin of the processing chip. When the float 400 is installed on the detection rod 300, the float 400 will exert pressure on the wire 303. The wire 303 in the present application has a certain resistance. When the squeezed positions come into contact to form an electrical circuit, current will be input to the analog-to-digital conversion pin of the processing chip. The magnitude of this current is directly related to the contact position. The higher the liquid level, the shorter the length of the wire 303 in the electrical circuit. At this time, because the resistance is smaller, the current is relatively large. After the processing chip converts the analog signal current into a digital signal, it determines the liquid level height corresponding to the current magnitude and displays it on the display screen 120.

[0035] In the embodiment of the present application, the contact groove 210 is annular. The two annular contact grooves 210 are both centered on the center of the bottom surface of the connection socket 200, and the two contact grooves 210 have different radii. The distances between the two contact heads 311 and the center of the top surface of the connection plug 310 are respectively the same as the radii of the two contact grooves 210.

[0036] Specifically, the outer side surface of the connection plug 310 has an external thread, and the inner side surface of the connection socket 200 has an internal thread. The connection plug 310 is screwed onto the connection socket 200 through the cooperation of the external thread and the internal thread. After adopting the screwing method, the contact head 311 can be inserted into the contact groove 210 and slide in the contact groove 210. As the sliding progresses, the connection plug 310 is gradually tightened in the connection socket 200, and at this time, the contact head 311 is also completely inserted into the contact groove 210, realizing a stable electrical connection.

[0037] Further, a contact layer is laid on the inner side surface of the contact groove 210. The contact layer is electrically connected to the display control circuit board 130. After the contact head 311 is inserted into the contact groove 210, it contacts the contact layer. The above-mentioned contact head 311 and the contact layer are both made of metal materials such as copper or aluminum. In order to increase the contact area, the contact head 311 can adopt a quadrangular prism structure, and the side surface thereof in contact with the contact layer is an arc-shaped structure matching the shape of the contact layer. Therefore, the contact surface between the contact layer and the contact head 311 is an arc surface with a relatively large area, improving the stability of the contact connection.

[0038] In a possible embodiment, an elastic diaphragm 302 is provided on the outer side surface of the detection rod 300. Two wires 303 are respectively provided at opposite positions on the inner side surface of the diaphragm 302. A convex structure is provided on the outer side surface of the inner hole of the float 400. The inner hole is slidably sleeved outside the diaphragm 302. The convex structure applies an extrusion force to the diaphragm 302 and the wires 303, causing the wires 303 to undergo elastic deformation, and further causing the two wires 303 to come into contact.

[0039] Exemplarily, the diaphragm 302 can be made of rubber. While having certain elasticity, it also has wear-resistant characteristics. Moreover, the liquid in the container can be isolated outside the isolation cavity 304 of the detection rod 300 through the diaphragm 302, avoiding mis-conduction between the two wires 303 caused by the liquid.

[0040] In the embodiment of the present application, sliding grooves 301 extending axially are provided at two opposite positions on the outer side surface of the detection rod 300. The diaphragm 302 is located at the position where the sliding groove 301 meets the isolation cavity 304 inside the detection rod 300. The outer side surface of the inner hole has a slider matching the sliding groove 301, and the convex structure is located on the side of the slider facing the diaphragm 302.

[0041] Specifically, the detection rod 300 is integrally made of an insulating material with a certain strength, such as hard plastic, etc. The detection rod 300 is provided with a sliding groove 301 communicating with the isolation cavity 304 on its side surface. The length of the sliding groove 301 is equivalent to the length of the detection rod 300, but the width of the sliding groove 301 is smaller, so that the width of the diaphragm 302 provided therein is also smaller, avoiding large deformation caused by the extrusion of the liquid when the width of the diaphragm 302 is larger, and preventing mis-conduction of the wires 303 adhered to the inner side surface of the diaphragm 302.

[0042] Furthermore, the gravity of the float 400 and the buoyancy of the float 400 in the liquid are both greater than the friction force between the convex structure and the diaphragm 302. Since the elastic force of the diaphragm 302 will also cause a large friction force with the float 400 when the float 400 squeezes the diaphragm 302, in order to avoid the float 400 being stuck due to the friction force, the float 400 of the present application can be set to have a larger volume, and the thickness of its side wall can also be larger. The larger volume can make it have sufficient buoyancy to slide upward on the detection rod 300 as the liquid level rises, and the larger side wall thickness can make the overall weight of the float 400 larger, enabling the float 400 to slide downward under the action of gravity when the liquid level height decreases, realizing accurate detection of the liquid level height.

[0043] In a possible embodiment, a connection base 320 is provided at a position near the upper end of the detection rod 300. A plurality of connection holes 321 are provided on the connection base 320, and the connection base 320 is used to mount the detection rod 300 on the container.

[0044] Exemplarily, the connection base 320 is of a disc structure and is fixed to the lower end of the connection plug 310. The connection holes 321 on the connection base 320 are used for bolts to pass through, and the connection base 320 can be fixed to the container to be detected by bolts. At this time, the detection rod 300 will be inserted into the container, and the liquid level height in the container is detected by the float 400.

[0045] In a possible embodiment, the display screen 120 is provided on the front cover plate 101, and the front cover plate 101 is detachably mounted on the front side of the display control unit 100.

[0046] Exemplarily, the front cover plate 101 can be detachably connected to the front side of the display control unit 100 by snaps or screws. When maintenance is required, the front cover plate 101 can be opened. During normal use, the gasket between the front cover plate 101 and the display control unit 100 can ensure that the display control circuit board 130 inside the display control unit 100 is not affected by the external environment.

[0047] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present application.

[0048] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A liquid level transmitter controller, characterized in that: include: A display control unit (100), wherein a display screen (120) and a cable socket (110) are provided on the display control unit (100), a display control circuit board (130) is provided inside the display control unit (100), and the display control circuit board (130) is electrically connected to the display screen (120) and the cable socket (110) respectively; A connection socket (200) is fixedly arranged at the bottom of the display and control unit (100), and two contact grooves (210) are arranged on the bottom surface of the connection socket (200); A detection rod (300), wherein a connection plug (310) is disposed at the upper end of the detection rod (300), and two contact heads (311) are disposed on the top surface of the connection plug (310), and the position of each contact head (311) corresponds to one of the contact slots (210); after the connection plug (310) is connected to the connection socket (200), the two contact heads (311) are correspondingly inserted into the two contact slots (210), so that the contact heads (311) are electrically connected to the display control circuit board (130) through the contact slots (210); The float (400) is axially slidably arranged outside the detection rod (300); the detection rod (300) is a hollow structure; two wires (303) are arranged inside the detection rod (300); the two wires (303) are electrically connected to the two contact heads (311) respectively; when the float (400) slides on the detection rod (300), the two wires (303) are squeezed; the two wires (303) are in contact at the squeezed position; and the display and control circuit board (130) determines the liquid level height according to the contact position of the wires (303).

2. A liquid level transmitter controller according to claim 1, characterized in that: The contact groove (210) is annular, the two annular contact grooves (210) are both centered at the bottom center of the connection socket (200), and the two contact grooves (210) have different radii, and the distance between the two contact heads (311) and the top center of the connection plug (310) is the same as the radius of the two contact grooves (210).

3. A liquid level transmitter controller according to claim 2, characterized in that: A contact layer is laid on the inner side surface of the contact groove (210), the contact layer is electrically connected to the display and control circuit board (130), and the contact head (311) contacts the contact layer after being inserted into the contact groove (210).

4. A liquid level transmitter controller according to claim 2, characterized in that: The outer side surface of the connection plug (310) has an external thread, and the inner side surface of the connection socket (200) has an internal thread. The connection plug (310) is screwed onto the connection socket (200) through the matching of the external thread and the internal thread.

5. A liquid level transmitter controller according to claim 1, characterized in that: The outer side surface of the detection rod (300) is provided with an elastic diaphragm (302), and the two conductive wires (303) are respectively provided at opposite positions on the inner side surface of the diaphragm (302). The float (400) is provided with a protruding structure on the outer side surface of the inner hole, and the inner hole is slidably sleeved on the outside of the diaphragm (302). The protruding structure applies a squeezing force to the diaphragm (302) and the conductive wires (303), so that the conductive wires (303) undergo elastic deformation, thereby making the two conductive wires (303) contact each other.

6. A liquid level transmitter controller according to claim 5, characterized in that: The detection rod (300) is provided with axially extending slide grooves (301) at two relative positions on the outer side surface, the diaphragm (302) is located at the intersection of the slide groove (301) and the isolation cavity (304) inside the detection rod (300), the outer side surface of the inner hole has a slider matching the slide groove (301), and the protruding structure is located on the side of the slider facing the diaphragm (302).

7. A liquid level transmitter controller according to claim 5, characterized in that: The gravity of the float (400) and the buoyancy of the float (400) in the liquid are both greater than the friction between the protruding structure and the diaphragm (302).

8. The liquid level transmitter controller according to claim 1, characterized in that: The detection rod (300) is provided with a connection seat (320) at a position close to the upper end, and the connection seat (320) is provided with a plurality of connection holes (321). The connection seat (320) is used to install the detection rod (300) on a container.

9. The liquid level transmitter controller according to claim 1, characterized in that: The display screen (120) is arranged on the front cover plate (101), and the front cover plate (101) is detachably mounted on the front side of the display and control unit (100).

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