A high-precision liquid level detection device

Abstract

This utility model discloses a high-precision liquid level detection device, relating to the field of liquid level detection technology. It includes a hot water tank with an installation port at the top. An installation plate is mounted inside the installation port via an elastic snap-fit ​​mechanism. A detection rod slides through the installation plate, and a float is mounted at the bottom of the detection rod via a locking and connecting mechanism. This utility model achieves high-precision liquid level detection by installing a float at the bottom of the detection rod that rises and falls with changes in liquid level. A laser rangefinder sensor monitors the rise and fall of the lifting ring on the detection rod in real time, thereby obtaining accurate values ​​of changes in liquid level within the hot water tank. Furthermore, the installation plate is detachably installed inside the installation port via the elastic snap-fit ​​mechanism, and the float is detachably installed at the bottom of the detection rod via the locking and connecting mechanism. This allows for convenient installation and removal of the float and installation plate from the hot water tank, facilitating regular maintenance and repair.

Description

Technical Field

[0001] This utility model relates to the field of liquid level detection technology, and in particular to a high-precision liquid level detection device. Background Technology

[0002] A liquid level detection device is an instrument used to measure the height (liquid level) of liquid in a container or equipment. It achieves accurate monitoring through physical, electronic or optical principles. In boiler production workshops, hot water tanks, as containers for condensate recovery, are usually equipped with corresponding liquid level detection devices to monitor the liquid level height in the hot water tanks.

[0003] For example, utility model patent application number 202223242338.7 discloses a hot water tank liquid level detection device, including a float, a marker, a liquid level detection mechanism and a controller. The top of the marker extends through the top of the hot water tank, and a limiting guide mechanism is provided on the top of the hot water tank. The liquid level detection mechanism includes a detection transmitter on the marker, a support rod at one end of the top of the hot water tank, a high liquid level detector at the top of the support rod and a low liquid level detector at the bottom of the support rod.

[0004] Based on existing technology, most liquid level detection devices have a simple structure and only have the function of monitoring the approximate height of the liquid level. They cannot obtain accurate values ​​of liquid level changes in real time, and the detection accuracy needs to be improved. In addition, the fixed structure of the device makes it inconvenient to disassemble and install the components from the hot water tank, which brings certain difficulties to the regular maintenance and repair work and is inconvenient to use. Therefore, this utility model proposes a high-precision liquid level detection device to solve the problems existing in the prior art. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this invention is to propose a high-precision liquid level detection device that solves the issues of existing liquid level detection devices being unable to obtain accurate values ​​of liquid level height changes in real time, having insufficient detection accuracy, and having a fixed device structure that makes it inconvenient to disassemble and assemble the various components.

[0006] To achieve the purpose of this utility model, the present utility model is implemented through the following technical solution: a high-precision liquid level detection device, including a hot water tank body, an installation port is opened at the top of the hot water tank body, an installation plate is installed on the inner side of the installation port through an elastic snap-fit ​​mechanism, a detection rod is slidably passed through the installation plate, a float is installed at the bottom end of the detection rod through a locking docking mechanism, a support frame is fixed at the top of the installation plate and sleeved on the outside of the detection rod, a lifting ring is fixedly sleeved on the outer wall of the detection rod, a laser ranging sensor adapted to the position of the lifting ring is fixed at the top of the installation plate, and a ranging display electrically connected to the laser ranging sensor is fixed on the outer wall of the support frame.

[0007] A further improvement is that: a limiting ring located around the detection rod is fixed at the center of both the mounting plate and the support frame, and limiting balls that contact the detection rod are fixed at equal intervals on the inner wall of the limiting ring.

[0008] A further improvement is that: both sides of the inner wall of the support frame are fixed with blocks that are symmetrically distributed vertically, a touch sensor is fixed on the side of the block near the lifting ring, and an alarm that is electrically connected to the touch sensor is fixed on the outer wall of the support frame.

[0009] A further improvement is that the locking and docking mechanism includes a threaded screw tube that is slidably sleeved on the lower part of the detection rod and a threaded post that is fixed on the top of the float, wherein the external thread of the outer wall of the threaded post is adapted to the internal thread of the threaded screw tube.

[0010] A further improvement is that the end of the threaded tube far from the threaded post extends inward at a 90-degree angle, and a retaining ring adapted to the threaded tube is fixedly sleeved on the lower part of the detection rod.

[0011] A further improvement is that the elastic snap-fit ​​mechanism includes cavities opened on both sides inside the mounting plate and sliders slidably disposed inside the cavities. Each of the two sets of sliders has an elastic pin fixed at one end that slides through to the outside of the mounting plate. The inner walls on both sides of the mounting port are provided with insertion holes adapted to the elastic pins. The top of the slider slides through to the top of the mounting plate via a connecting block and is fixed with a pull ring.

[0012] A further improvement is that a limiting spring is movably sleeved on one side of the elastic pin located inside the cavity, and the limiting spring is fixed between the slider and the inner wall of the cavity.

[0013] The beneficial effects of this utility model are as follows: This utility model includes a hot water tank body. A float that rises and falls with the liquid level is installed at the bottom of a detection rod. The rise and fall of the lifting ring on the detection rod is monitored in real time by a laser rangefinder sensor, thereby obtaining an accurate value of the liquid level change in the hot water tank body in real time, achieving high-precision liquid level detection. Furthermore, an installation plate is detachably installed in the installation port through an elastic snap-fit ​​mechanism, and the float is detachably installed at the bottom of the detection rod through a locking docking mechanism. This allows the float and installation plate to be easily installed and removed from the hot water tank body, thus facilitating regular maintenance and repair work and making it convenient to use. Attached Figure Description

[0014] Figure 1 This is a front view of the present invention;

[0015] Figure 2 This is a front sectional view of the present invention;

[0016] Figure 3 This is the utility model Figure 2 Enlarged view of point A in the image;

[0017] Figure 4 This is the utility model Figure 2 Enlarged view of point B in the image;

[0018] Figure 5 This is the utility model Figure 2 Enlarged view of point C in the image;

[0019] Figure 6 This is a cross-sectional view of the connection between the threaded screw tube and the threaded post of this utility model.

[0020] The components include: 1. Hot water tank body; 2. Installation port; 3. Mounting plate; 4. Detection rod; 5. Float; 6. Support frame; 7. Lifting ring; 8. Laser rangefinder sensor; 9. Rangefinder display; 10. Limiting ring; 11. Limiting ball; 12. Stop; 13. Touch sensor; 14. Alarm; 15. Threaded screw connector; 16. Threaded post; 17. Retaining ring; 18. Cavity; 19. Slider; 20. Elastic pin; 21. Insertion hole; 22. Pull ring; 23. Limiting spring. Detailed Implementation

[0021] To deepen the understanding of this utility model, the following detailed description will be provided in conjunction with embodiments. These embodiments are only used to explain this utility model and do not constitute a limitation on the scope of protection of this utility model.

[0022] according to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, this embodiment provides a high-precision liquid level detection device, including a hot water tank 1 for storing condensate and an installation port 2 located at the center of the top of the hot water tank 1. Water inlet pipes and outlet pipes with built-in electrically controlled valves are fixed to the outer walls of the left and right sides of the hot water tank 1, respectively. An installation plate 3 is embedded inside the installation port 2, and the installation plate 3 is detachably fixed to the installation port 2 via an elastic snap-fit ​​mechanism. A detection rod 4 extends through the installation plate 3 and into the interior of the hot water tank 1. A float 5, which rises and falls with the water level, is detachably installed at the bottom of the detection rod 4 via a locking and connecting mechanism. The installation plate 3 is detachably installed in the installation port 2 via the elastic snap-fit ​​mechanism, and the float 5 is detachably installed at the bottom of the detection rod 4 via the locking and connecting mechanism, thus enabling convenient assembly and disassembly of the float 5 and the installation plate 3 on the hot water tank 1. The top of the installation plate 3 is secured by a screw... A support frame 6 is fixed in place, and a detection rod 4 slides through the top of the support frame 6. A lifting ring 7, which moves up and down synchronously with the detection rod 4, is fixedly sleeved on the outer wall of the detection rod 4. A laser range sensor 8 is fixed to the top of the mounting plate 3 by screws, and the detection end of the laser range sensor 8 is vertically upward and adapted to the position of the lifting ring 7, for real-time monitoring of the displacement of the lifting ring 7. A range display 9 is fixed to the outer wall of the right side of the support frame 6. The laser range sensor 8 is connected to the device's built-in PLC control system, for sending monitoring data back to the range display 9 for display, so that the user can know the liquid level height. By installing a float 5 at the bottom of the detection rod 4 that moves up and down with the liquid level height, and by monitoring the rise and fall of the lifting ring 7 on the detection rod 4 in real time through the laser range sensor 8, the accurate value of the liquid level height change in the hot water tank 1 can be obtained in real time.

[0023] Limiting rings 10 are fixed at the center of both the mounting plate 3 and the support frame 6. The limiting rings 10 are located around the detection rod 4. Limiting balls 11 are fixed on the inner wall of the limiting rings 10 in annular and equidistant arrangement. The limiting balls 11 are in contact with the detection rod 4 and play a limiting role in the detection rod 4, making it more stable during the lifting and lowering process.

[0024] Two sets of symmetrically distributed blocks 12 are fixed to the inner walls of the left and right sides of the support frame 6 by bolts. A touch sensor 13 is fixed to the side of the block 12 near the lifting ring 7. An alarm 14 is fixed to the outer wall of the support frame 6. The touch sensor 13 is connected to the PLC control system of the device and is used to drive the alarm 14 to sound an alarm when it is touched by the lifting ring 7.

[0025] The locking and docking mechanism includes a threaded screw-in connector 15 and a threaded post 16. The threaded screw-in connector 15 is slidably sleeved on the lower part of the detection rod 4, and the threaded post 16 is welded and fixed to the center position of the top of the float 5. The external thread of the outer wall of the threaded post 16 is adapted to the internal thread of the threaded screw-in connector 15, so that the threaded screw-in connector 15 can be screwed onto the threaded post 16. A retaining ring 17 adapted to the threaded screw-in connector 15 is fixedly sleeved on the lower part of the detection rod 4. The end of the threaded screw-in connector 15 away from the threaded post 16 extends inward at a 90-degree angle and cooperates with the retaining ring 17 to form a limiting block. When the threaded screw-in connector 15 is continuously screwed onto the threaded post 16, under the action of the retaining ring 17, it can drive the bottom end of the detection rod 4 to dock and lock with the top end of the threaded post 16.

[0026] The elastic locking mechanism includes a cavity 18 and sliders 19. The cavity 18 has two sets of sliders, one on each side of the mounting plate 3. The sliders 19 also have two sets, each sliding within the cavity 18. Each set of sliders 19 has an elastic pin 20 fixed to one end at an opposite position. The end of the elastic pin 20 away from the slider 19 slides through to the outside of the mounting plate 3. The inner walls of the mounting opening 2 on both sides have insertion holes 21 that mate with the elastic pins 20. Installation is achieved by inserting the elastic pins 20 into the insertion holes 21. The plate 3 is installed and fixed in the mounting port 2. The top of the slider 19 slides through the connecting block to the top of the mounting plate 3 and is fixed with a pull ring 22, so that the user can move the slider 19 by pulling the pull ring 22. The elastic pin 20 is located in the cavity 18 and is movably sleeved with a limiting spring 23. The limiting spring 23 is fixed between the slider 19 and the inner wall of the cavity 18. The limiting spring 23 provides elastic contraction force to the slider 19, thereby driving the elastic pin 20 to push outward at all times, and has an automatic rebound reset function.

[0027] In actual use, the float 5, carrying the detection rod 4, floats on the water surface inside the hot water tank 1. The detection rod 4 moves along the mounting plate 3 and support frame 6, driving the lifting ring 7 to move up and down with the fluctuation of the condensate in the hot water tank 1. At the same time, the laser range sensor 8 monitors the up and down movement distance of the lifting ring 7 in real time, and the measurement result is sent to the range display 9 for display. The liquid level height inside the hot water tank 1 is determined based on the up and down movement distance of the lifting ring 7, realizing digital high-precision liquid level detection. During the up and down movement of the lifting ring 7, if it rises or falls to the position of the touch sensor 13 and touches the touch sensor 13, the alarm 14 is activated to sound an alarm, indicating that the liquid level height inside the hot water tank 1 is higher or lower than the preset value at this time, so as to remind relevant personnel to add water or drain water in time.

[0028] When it is necessary to disassemble the relevant components of the liquid level detection device for maintenance and repair, first release the elastic snap-fit ​​mechanism from the mounting plate 3, and the mounting plate 3, along with the detection rod 4 and the float 5, can be easily removed from the hot water tank 1. Then, release the locking and docking mechanism from the locking and docking mechanism between the detection rod 4 and the float 5, and the float 5 can be removed from the bottom of the detection rod 4. This completes the convenient disassembly of the relevant components, and then the corresponding maintenance and repair work can be carried out. During installation, first use the locking and docking mechanism to lock and fix the float 5 to the bottom of the detection rod 4, then put the float 5 into the hot water tank 1, and at the same time, embed the mounting plate 3 into the installation port 2. Then, use the elastic snap-fit ​​mechanism to snap and fix the mounting plate 3 into the installation port 2, thus completing the convenient installation, so that the liquid level detection work can continue.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-precision liquid level detection device, comprising a hot water tank (1), characterized in that: The hot water tank body (1) has an installation port (2) at the top. An installation plate (3) is installed inside the installation port (2) through an elastic snap-fit ​​mechanism. A detection rod (4) slides through the installation plate (3). A float (5) is installed at the bottom of the detection rod (4) through a locking docking mechanism. A support frame (6) is fixed at the top of the installation plate (3) and sleeved on the outside of the detection rod (4). A lifting ring (7) is fixedly sleeved on the outer wall of the detection rod (4). A laser range sensor (8) that is adapted to the position of the lifting ring (7) is fixed at the top of the installation plate (3). A range display (9) that is electrically connected to the laser range sensor (8) is fixed on the outer wall of the support frame (6).

2. The high-precision liquid level detection device according to claim 1, characterized in that: The mounting plate (3) and the support frame (6) are both fixed with a limiting ring (10) located around the detection rod (4). The inner wall of the limiting ring (10) is fixed with limiting balls (11) that are in contact with the detection rod (4) at equal intervals.

3. The high-precision liquid level detection device according to claim 1, characterized in that: Both sides of the support frame (6) are fixed with blocks (12) that are symmetrically distributed vertically. A touch sensor (13) is fixed on the side of the block (12) near the lifting ring (7). An alarm (14) that is electrically connected to the touch sensor (13) is fixed on the outer wall of the support frame (6).

4. The high-precision liquid level detection device according to claim 1, characterized in that: The locking and docking mechanism includes a threaded screw tube (15) slidably sleeved on the lower part of the detection rod (4) and a threaded column (16) fixed on the top of the float (5). The external thread of the outer wall of the threaded column (16) is adapted to the internal thread of the threaded screw tube (15).

5. The high-precision liquid level detection device according to claim 4, characterized in that: The threaded screw connector (15) extends inward at a 90-degree angle from the threaded post (16) at one end, and a retaining ring (17) adapted to the threaded screw connector (15) is fixedly sleeved on the lower part of the detection rod (4).

6. The high-precision liquid level detection device according to claim 1, characterized in that: The elastic snap-fit ​​mechanism includes cavities (18) opened on both sides inside the mounting plate (3) and sliders (19) slidably disposed inside the cavities (18). Each of the two sets of sliders (19) has an elastic pin (20) fixed at opposite ends that slides through to the outside of the mounting plate (3). The inner walls on both sides of the mounting port (2) are provided with insertion holes (21) that are adapted to the elastic pins (20). The top of the slider (19) slides through to the top of the mounting plate (3) through a connecting block and is fixed with a pull ring (22).

7. The high-precision liquid level detection device according to claim 6, characterized in that: The elastic pin (20) is movably fitted with a limiting spring (23) on one side inside the cavity (18), and the limiting spring (23) is fixed between the slider (19) and the inner wall of the cavity (18).

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