A multifunctional liquid level detector

Abstract

The present invention discloses a multifunctional liquid level detector, comprising a shell, a float ball is installed in the shell, the float ball is connected to a swing arm, the swing shaft is installed on the swing arm, the float ball and the swing arm can drive the swing shaft to swing together, the swing shaft extends through the shell to the back, and a fixing unit and a liquid level detection unit matched therewith are arranged along the direction of the axis. The multifunctional liquid level detector provided by the present invention realizes liquid level detection and specific gravity detection by arranging three kinds of accessories with different structures inside the shell with the same structure, and can feed back the detection information to the control system at the same time, and can realize the function of maintaining the liquid level in combination with other components such as pumps and valves.

Description

Technical Field

[0001] The invention belongs to the technical field of liquid level monitoring, and in particular relates to a multifunctional liquid level detector. Background Art

[0002] The existing liquid level maintainer can only realize the on-off function of the liquid through the switch, but cannot monitor the liquid level, nor can it monitor the specific gravity with other liquids, and cannot achieve the purpose of multi-functional detection.

[0003] Therefore, providing a multifunctional liquid level detection device is a problem that needs to be solved by those skilled in the art. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a multifunctional liquid level detector which can monitor the liquid level and specific gravity.

[0005] In order to achieve the above-mentioned purpose, the multifunctional liquid level detector provided by the present invention includes: a shell, a float is installed in the shell, the float is connected to the swing arm, the swing shaft is installed on the swing arm, the float and the swing arm can drive the swing shaft to swing together, the swing shaft extends through the shell to the back side, and a fixing unit and a liquid level detection unit matching with it are arranged along the direction of the axis.

[0006] Furthermore, the fixing unit includes a rotating shaft fixing seat, a sleeve, a first sealing ring, a third sealing ring, a positioning ring, a locking nut, a sealing nut and a second sealing ring which are sequentially arranged along the swing axis.

[0007] Furthermore, the liquid level detection unit includes a liquid level detection component, which includes a magnet and a position sensor PCB, the magnet is installed on a magnet fixing seat, and the magnet fixing seat is installed on the other end of the swing shaft; the position sensor PCB is installed on a position sensor support, and the position sensor PCB and the position sensor support maintain a coaxial relationship with the magnet through a positioning ring.

[0008] Furthermore, the liquid level detection unit includes a liquid level detection component, and the liquid level detection component includes a swing needle and a position switch. One end of the swing needle is connected to the swing shaft, and the other end is drivingly connected to the position switch.

[0009] Furthermore, the liquid level detection unit includes a specific gravity detection component, which includes a magnet and a position sensor PCB, the magnet is installed on a magnet fixing seat, and the magnet fixing seat is installed on the other end of the swing shaft; the position sensor PCB is installed on a position sensor support, and the position sensor PCB and the position sensor support maintain a coaxial relationship with the magnet through a positioning ring; the specific gravity detection component also includes a spring traction mechanism, the spring traction mechanism includes a spring and a spring fixing seat, one end of the spring is connected to the swing shaft through a swing pin, and the other end is installed on the spring fixing seat.

[0010] Furthermore, a transparent cover is installed on the front of the shell.

[0011] The multifunctional liquid level detector provided by the present invention realizes liquid level detection and specific gravity detection by arranging three accessories with different structures inside a shell with the same structure. At the same time, the detection information can be fed back to the control system. In combination with other components, such as pumps and valves, the liquid level maintenance function can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0013] Figure 1a It is a structural diagram 1 of embodiment 1;

[0014] Figure 1b It is a structural schematic diagram 2 of embodiment 1;

[0015] Figure 1c It is a structural diagram 3 of embodiment 1;

[0016] Figure 1d It is a structural diagram 4 of the first embodiment;

[0017] Figure 2a This is a structural diagram 1 of Embodiment 2;

[0018] Figure 2b This is a structural diagram 2 of Embodiment 2;

[0019] Figure 2c It is the structural diagram 3 of the second embodiment;

[0020] Figure 2d It is a structural diagram 4 of the second embodiment;

[0021] Figure 3a This is a structural diagram 1 of Embodiment 3;

[0022] Figure 3b This is a structural diagram 2 of Embodiment 3;

[0023] Figure 3cThis is a structural diagram 3 of Embodiment 3;

[0024] Figure 3d This is structural diagram 4 of embodiment 3.

[0025] Meaning of the symbols in the figure:

[0026] Figure 1a-1d :

[0027] 1-1, transparent cover; 1-2, floating ball; 1-3, housing; 1-4, limit block; 1-5, swing arm; 1-6, position sensor support; 1-7, swing shaft; 1-8, shaft fixing seat; 1-9, sleeve; 1-10, first sealing ring; 1-11, locking nut; 1-12, sealing nut; 1-13, position sensor PCB; 1-14, magnet; 1-15, magnet fixing seat; 1-16, second sealing ring; 1-17, positioning ring; 1-18, third sealing ring;

[0028] Figure 2a-2d :

[0029] 2-1, transparent cover; 2-2, float; 2-3, housing; 2-4, limit block; 2-5, swing arm; 2-6, swing needle; 2-7, position switch; 2-8, swing shaft; 2-9, shaft fixing seat; 2-10, sleeve; 2-11, first sealing ring; 2-12, locking nut; 2-13, sealing nut; 2-14, second sealing ring; 2-15, positioning ring; 2-16, third sealing ring;

[0030] Figure 3a-3d :

[0031] 3-1, transparent cover; 3-2, float; 3-3, housing; 3-4, limit block; 3-5, swing arm; 3-6, position sensor support; 3-7, swing needle; 3-8, swing shaft; 3-9, spring; 3-10, spring fixing seat; 3-11, shaft fixing seat; 3-12, bushing; 3-13, first sealing ring; 3-14, locking nut; 3-15, sealing nut; 3-16, position sensor PCB; 3-17, magnet; 3-18, magnet fixing seat; 3-19, second sealing ring; 3-20, positioning ring; 3-21, third sealing ring. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific diagrams.

[0033] In view of the problems existing in the prior art, the present invention provides a multifunctional liquid level detector, which realizes three different functions, namely analog output type, switch output type and specific gravity measurement type, by arranging three accessories with different structures inside a shell with the same structure. The detector is used to observe and maintain the cooling water level, vent, drain and detect the specific gravity of the fuel, maintain the liquid level of the engine oil and detect the quality of the engine oil, and all these functions can be achieved by simply replacing the internal accessories.

[0034] The three different functions of the multifunctional liquid level detector are specifically described below through three embodiments.

[0035] Example 1: Analog output type

[0036] like Figure 1a-1d As shown, the analog output type multifunctional liquid level detector provided in this example includes a shell 1-3, a transparent cover 1-1 is installed in the front of the shell 1-3, a float 1-2 is installed in the shell 1-3, the float 1-2 is welded to the swing arm 1-5, and the swing shaft 1-7 is installed on the swing arm 1-5. The float 1-2 and the swing arm 1-5 can drive the swing shaft 1-7 to swing together. The swing shaft 1-7 extends through the shell 1-3 to the back side. Along the direction of the axis, there are parts such as a rotating shaft fixing seat 1-8, a sleeve 1-9, a first sealing ring 1-10, a third sealing ring 1-18, a positioning ring 1-17, a locking nut 1-11, a sealing nut 1-12, and a second sealing ring 1-16.

[0037] A magnetic steel fixing seat 1-15 is installed at the other end of the swing shaft 1-7, on which a magnetic steel 1-14 is installed. The position sensor PCB1-13 is installed on the position sensor support 1-6. The position sensor PCB1-13 and the position sensor support 1-6 maintain a coaxial relationship with the magnetic steel 1-14 through the positioning ring 1-17.

[0038] At the same time, a limit block 1-4 is provided together with the swing arm 1-5 to ensure that the swing arm 1-5 swings within a corresponding range, thereby ensuring the accuracy of monitoring.

[0039] Based on the analog output multifunctional liquid level detector of the above structure, in specific application, when the liquid flows into / out of the shell, the liquid level begins to change, and the float 1-2 begins to rise or fall under the action of buoyancy. The float 1-2 drives the swing arm 1-5 and the swing shaft 1-7 to drive the magnet 1-14 to rotate. The position sensor PCB1-13 detects the rotation of the magnet 1-14 and the change of the magnetic field, and then outputs an electrical signal related to the position, and transmits this signal to the control system to judge the height of the liquid level (continuously measure the liquid position). When the liquid level drops and reaches the set low level, the control system starts the liquid replenishment program, starts the pump and valve devices, and replenishes the liquid into the device being replenished. When the liquid rises to the set high level, the control system shuts down the pump and valve devices and stops the liquid replenishment action.

[0040] Embodiment 2: Switching output type

[0041] like Figure 2a-2d As shown, the switch output type multifunctional liquid level detector provided in this example includes a shell 2-3, a transparent cover 2-1 is installed in the front of the shell 2-3, a float 2-2 is installed in the shell 2-3, the float 2-2 is welded to the swing arm 2-5, and the swing shaft 2-8 is installed on the swing arm 2-5. The float 2-2 and the swing arm 2-5 can drive the swing shaft 2-8 to swing together. The swing shaft 2-8 extends through the shell 2-3 to the back side. Along the direction of the axis, there are parts such as the shaft fixing seat 2-9, the sleeve 2-10, the first sealing ring 2-11, the third sealing ring 2-16, the positioning ring 2-15, the locking nut 2-12, the sealing nut 2-13, the second sealing ring 2-14 and so on.

[0042] On the basis of the analog multifunctional liquid level detector in Example 1, the magnet, the magnet fixing seat, the position sensor PCB and the position sensor support are removed, and a position switch 2-7 is installed under the pendulum needle 2-6. The switch action is driven by the rotation of the pendulum needle 2-6, wherein the pendulum needle 2-6 is fastened together with the other end of the swing shaft 2-8.

[0043] At the same time, a limit block 2-4 is provided together with the swing arm 2-5 to ensure that the swing arm 2-5 swings within a corresponding range, thereby ensuring the accuracy of monitoring.

[0044] Based on the switch output type multifunctional liquid level detector set up with the above structure, in specific applications, when the liquid flows into / out of the shell, the liquid level begins to change, and the float 2-2 begins to rise or fall under the action of buoyancy. The float 2-2 drives the swing arm 2-5 and the swing shaft 2-8 to drive the pendulum needle 2-6 to rotate, and the pendulum needle 2-6 drives the position switch 2-7 to operate. When the liquid level is high, the switch is closed, and when the liquid level is low, the switch is opened, and a switch on-off signal is output to the control system. This signal is transmitted to the control system, and the control system can judge the height of the liquid level based on this (only the highest and lowest points of the liquid level can be measured). When the liquid level drops and triggers the position switch 2-7 to open, the control system starts the liquid replenishment program, starts the pump and valve devices, and replenishes the liquid into the device being replenished. When the liquid rises to the set position, the position switch 2-7 is closed, and the control system shuts down the pump and valve devices and stops the liquid replenishment action.

[0045] Example 3: Specific gravity measurement type

[0046] like Figure 3a-3d As shown, the specific gravity measurement type multifunctional liquid level detector provided in this example includes a shell 3-3, a transparent cover 3-1 is installed in the front of the shell 3-3, a float 3-2 is installed in the shell 3-3, the float 3-2 is welded to the swing arm 3-5, and the swing shaft 3-8 is installed on the swing arm 3-5. The float 3-2 and the swing arm 3-5 can drive the swing shaft 3-8 to swing together. The swing shaft 3-8 extends through the shell 3-8 to the back side. Along the direction of the axis, there are parts such as the shaft fixing seat 3-11, the sleeve 3-12, the first sealing ring 3-13, the third sealing ring 3-21, the positioning ring 3-20, the locking nut 3-14, the sealing nut 3-15, the second sealing ring 3-19 and the like.

[0047] A magnetic steel fixing seat 3-18 is installed at the other end of the swing shaft 3-8, on which a magnetic steel 3-17 is installed. The position sensor PCB3-16 is installed on the position sensor support 3-6. The position sensor PCB3-16 and the position sensor support 3-6 maintain a coaxial relationship with the magnetic steel 3-17 through the positioning ring 3-20.

[0048] A spring traction mechanism is added on the basis of the analog multifunctional liquid level detector in the first embodiment. The spring traction mechanism includes a spring 3-9 and a spring fixing seat 3-10.

[0049] Among them, one end of the spring 3-9 is connected to the swing shaft 3-8 through the swing pin 3-7, and the other end is installed on the spring fixing seat 3-10.

[0050] At the same time, a limit block 3-4 is provided together with the swing arm 3-5 to ensure that the swing arm 3-5 swings within a corresponding range, thereby ensuring the accuracy of monitoring.

[0051] Based on the analog output multifunctional liquid level detector of the above structure, in specific application, when liquid flows into the shell, the float 3-2 rises under the action of buoyancy and pulls the spring 3-9. When the buoyancy and spring force reach a balance, the float 3-2 stops rising, and the corresponding position value can be measured by the position sensor PCB3-16. When the density of the liquid filled in the cavity is different, the buoyancy of the float 3-2 is different (according to the Archimedes principle, the float is completely immersed in the liquid, and the volume of liquid it displaces is certain, but due to the different density of the liquid, it affects the weight of the liquid it displaces. The buoyancy of the float in different liquids is different. When the density is large, the buoyancy is large, and when the density is small, the buoyancy is small), and the length of the spring 3-9 is also different, which affects the position value of the float. That is, in liquids of different densities, the position value measured by the position sensor PCB3-16 is different. Through calibration, the density (specific gravity) of the liquid can be detected by the position sensor PCB3-16.

[0052] The multifunctional liquid level detector provided by this scheme is provided with three accessories with different structures inside the same structural shell. When combined with other components (such as pumps and valves), the liquid flows in from the inlet, flows out from the outlet, and then flows into the component that needs to be replenished with liquid. The balance port on the top can be used to balance the air pressure inside the replenished component. The liquid level height and liquid state can be seen through the transparent cover plate. The liquid level height signal can be fed back to the control system through the attached sensor. The control system can control the action of the pump and valve according to this signal to maintain the height of the liquid level, thereby realizing the observation and maintenance of the cooling water level, the exhaust, drainage and specific gravity detection of the fuel, and the liquid level maintenance and oil quality detection of the engine oil.

[0053] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A multifunctional liquid level detector, characterized in that: include: A housing, a floating ball is installed in the housing, the floating ball is connected to a swing arm, a swing shaft is installed on the swing arm, the floating ball and the swing arm can drive the swing shaft to swing together, the swing shaft extends through the housing to the back, and a fixing unit and a liquid level detection unit matched therewith are arranged along the direction of the shaft. The liquid level detection unit comprises a liquid level detection component and a spring traction mechanism, wherein the liquid level detection component comprises a magnetic steel and a position sensor PCB, wherein the magnetic steel is mounted on a magnetic steel fixing seat, and the magnetic steel fixing seat is mounted on the other end of the swing shaft; the position sensor PCB is mounted on a position sensor support, and the position sensor PCB and the position sensor support maintain a coaxial relationship with the magnetic steel through a positioning ring; the spring traction mechanism comprises a spring and a spring fixing seat, wherein one end of the spring is connected to the swing shaft through a swing pin, and the other end is mounted on the spring fixing seat; When the liquid flows into / out of the shell, the liquid level begins to change, and the float begins to rise or fall under the action of buoyancy. The float drives the swing arm, and the swing shaft drives the magnet to rotate. The position sensor detects the rotation of the magnet and the change of the magnetic field, and then outputs an electrical signal related to the position, and transmits this signal to the control system to judge the height of the liquid level. At the same time, the float rises under the action of buoyancy and pulls the spring. When the buoyancy and spring force reach a balance, the float stops rising, and the corresponding position value is measured by the position sensor. When the density of the liquid filled in the cavity is different, the float will pull the spring to different lengths, which in turn affects the position value of the float. For liquids of different densities, the position value measured by the position sensor is calibrated, thereby detecting the density of the liquid through the position sensor.

2. The multifunctional liquid level detector according to claim 1, characterized in that: The fixing unit comprises a rotating shaft fixing seat, a shaft sleeve, a first sealing ring, a third sealing ring, a positioning ring, a locking nut, a sealing nut and a second sealing ring which are sequentially arranged along the swing shaft.

3. The multifunctional liquid level detector according to claim 1, characterized in that: The liquid level detection unit comprises a liquid level detection component, and the liquid level detection component comprises a swing needle and a position switch. One end of the swing needle is connected to the swing shaft, and the other end is drivingly connected to the position switch.

4. The multifunctional liquid level detector according to claim 1, characterized in that: A transparent cover plate is installed on the front of the shell.

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