Fire-fighting wireless liquid level sensor

Abstract

The invention provides a fire-fighting wireless liquid level sensor, and relates to the technical field of wireless liquid level sensors, the fire-fighting wireless liquid level sensor comprises a liquid level sensor body, the liquid level sensor body comprises a shell, a connecting wire and a detection probe, a protective shell for protection is arranged below the shell, two connecting plates are arranged in the protective shell, and connecting rings are arranged in the two connecting plates; two connecting seats are fixedly connected to the annular side face of the connecting ring, the connecting plate can be attached to the other connecting plate when moving upwards, damping pads are fixed between the connecting plate and the connecting plate, the two pairs of damping pads can generate elastic deformation when making contact, vibration energy is converted into elastic potential energy, and therefore the vibration amplitude transmitted to the sensor is reduced, and the reliability of the sensor is improved. And a group of damping springs are also compressed to absorb the vibration force, the pressure is dispersed to a group of diffusion plates, and the vibration force is dispersed, so that the vibration can be effectively reduced, the sensor is kept stable, and the precision of liquid level measurement is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless liquid level sensors, and more specifically, particularly relates to a fire-fighting wireless liquid level sensor. Background Art

[0002] As a key monitoring device in the fire-fighting system, the fire-fighting wireless liquid level sensor is widely used in places such as fire-fighting water tanks and fire-fighting pools to accurately monitor the liquid level height in real time, providing key data support for fire-fighting water management and ensuring the sufficient supply of fire-fighting water in case of emergencies such as fires. It usually involves the following key technologies and components:

[0003] 1. Sensor probe: It is the core component that directly contacts the liquid and senses the liquid level change. It works based on different principles. For example, the hydrostatic type calculates the liquid level by sensing the liquid pressure, the ultrasonic type measures the liquid level using the propagation characteristics of ultrasonic waves, and the radar type determines the liquid level height by means of radar wave reflection;

[0004] 2. Wireless communication module: It is responsible for wirelessly transmitting the liquid level data collected by the sensor. Common communication protocols include NB-IoT, 4G, LoRaWAN, etc., which can realize remote data transmission, enabling monitoring personnel to real-time control the liquid level dynamics.

[0005] Currently, to ensure the reliability and accuracy of fire-fighting liquid level monitoring, various manufacturers have adopted a variety of design and technical means. Some manufacturers focus on optimizing the sensor accuracy, using high-precision pressure sensors and advanced algorithms to reduce measurement errors; some manufacturers work on the stability of wireless transmission, ensuring uninterrupted transmission of liquid level data by enhancing antenna performance and optimizing communication protocols; in addition, some manufacturers are committed to improving the environmental adaptability of the sensor, enabling the product to still work normally in high-temperature, humid, and corrosive environments.

[0006] However, there are still some problems in the existing technology that need to be solved urgently. In terms of shock absorption, most fire-fighting wireless liquid level sensors do not fully consider the vibration factors in the installation environment, such as the operation of water pumps in the fire pump room and the vibration of building structures. These vibrations are easily transmitted to the sensor, causing the probe to shake. On the one hand, it affects the accurate perception of pressure by the static pressure sensor, resulting in deviation of measurement data. On the other hand, it also interferes with the signal transmission and reception of ultrasonic or radar sensors, reducing the liquid level measurement accuracy. It may even cause the internal electronic components of the sensor to loosen and be damaged, shortening the service life. In terms of probe protection and cleaning, many products have insufficient protection measures. The probe is easily collided, worn by impurities in the water, and corroded by chemical substances. Moreover, there is a lack of convenient and effective cleaning means. As the use time increases, dirt accumulates on the surface of the probe, and the staff needs to carry complex cleaning tools additionally, thus reducing the work efficiency. In response to these problems, this application proposes an innovative solution, designing a fire-fighting wireless liquid level sensor with an efficient shock absorption structure and perfect probe protection and cleaning functions to improve the stability, reliability and measurement accuracy of the sensor in a complex fire environment.

[0007] In view of this, research and improvement are carried out on the existing structure and deficiencies, and a fire-fighting wireless liquid level sensor is provided with the expectation of achieving a more practical value purpose. Summary of the Invention

[0008] In order to solve the above technical problems, the present invention provides a fire-fighting wireless liquid level sensor to solve the above problems.

[0009] A fire-fighting wireless liquid level sensor includes a liquid level sensor body. The liquid level sensor body includes a housing, a connecting wire and a detection probe. A protective shell for protection is arranged below the housing. Two connecting plates are arranged in the protective shell. A connecting ring is arranged in the two connecting plates. Two connecting seats are fixedly connected to the circumferential side of the connecting ring. Two diffusion plates are arranged on the opposite sides of the two connecting seats. Fixed blocks are arranged below the two pairs of diffusion plates. A damping telescopic rod is arranged between each diffusion plate and each fixed block. A shock absorption spring is movably sleeved on the circumferential side of each damping telescopic rod. A connecting block is movably clamped above the protective shell. A protective mesh cover is arranged on the circumferential side of the detection probe. A cleaning scraping ring is fixedly connected in the protective mesh cover. A threaded ring is fixedly connected to the left surface of the detection probe. The threaded ring is threadedly sleeved with the protective mesh cover.

[0010] Preferably, two limiting blocks are fixedly connected to the inner wall of the protective shell. Card slots are respectively arranged on the left and right sides of the connecting block. The two card slots are respectively movably connected to the two limiting blocks. The upper connecting plate of the two connecting plates is fixedly connected to the connecting block.

[0011] Preferably, two L-shaped blocks are fixedly connected to the annular side surface of the connecting ring, and the two L-shaped blocks are fixedly connected to the upper connecting plate among the two connecting plates. Two shock pads are fixedly connected to the opposite surfaces of the two connecting plates, and two connecting shafts are respectively fixedly connected to the opposite surfaces of the two pairs of diffusion plates.

[0012] Preferably, the two connecting shafts are respectively rotatably connected to the two connecting seats. Fixed seats are fixedly connected to the opposite surfaces of a set of diffusion plates and a set of fixed blocks, and the two sets of fixed seats are respectively fixedly connected to a set of damping telescopic rods and a set of shock-absorbing springs.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In the present invention, the two pairs of diffusion plates are rotatably connected to the two connecting seats. As the distance between the diffusion plates and the fixed blocks changes, a set of damping telescopic rods will be driven to expand and contract. When the damping telescopic rod expands and contracts, the piston rod arranged therein moves in the cylinder barrel, thereby driving the viscous liquid to flow through the pores. When the liquid passes through the pores, it will be subjected to resistance, and this resistance will hinder the flow of the liquid, converting the kinetic energy of the fluid into heat energy, thereby absorbing this part of the vibration energy and further improving the shock absorption effect. When the connecting plate moves upward, it will fit with the other connecting plate, and a shock pad is fixed between the two. When the two pairs of shock pads come into contact, elastic deformation will occur, converting the vibration energy into elastic potential energy, thereby reducing the vibration amplitude transmitted to the sensor.

[0015] In the present invention, a set of shock-absorbing springs will also be compressed to absorb the shock force, and the pressure will be dispersed to a set of diffusion plates. By dispersing the shock force, these vibrations can be effectively reduced, keeping the sensor stable, thereby improving the accuracy of liquid level measurement. And through shock absorption, the impact force on the internal components of the sensor can be reduced, thereby extending their service life.

[0016] In the present invention, due to the rotation and removal of the protective mesh cover, the cleaning scraping ring will slide and scrape along the surface of the detection probe, scraping off the dirt on the surface of the detection probe. By timely cleaning the dirt and corrosive substances on the surface of the detection probe, these substances can be prevented from causing long-term damage to the detection probe. The design of the cleaning scraping ring makes the cleaning work of the detection probe simple, and the staff does not need to carry additional complex cleaning tools, which can greatly improve work efficiency in the daily maintenance of fire-fighting facilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 is a schematic diagram of the protective shell structure of the present invention;

[0019] Figure 3It is a schematic structural diagram of the protective net cover of the present invention;

[0020] Figure 4 It is a schematic structural diagram of the connection block of the present invention;

[0021] Figure 5 It is a schematic structural diagram of the limit block of the present invention;

[0022] Figure 6 It is a schematic structural diagram of the connection plate of the present invention;

[0023] Figure 7 It is a schematic structural diagram of the diffusion plate of the present invention.

[0024] In the figure, the corresponding relationship between the structural names and the drawing numbers is as follows: 1. Outer shell; 2. Connecting wire; 3. Detection probe; 4. Protective net cover; 5. Connection block; 6. Protective shell; 7. Connection plate; 8. Threaded ring; 9. Cleaning scraping ring; 10. Card slot; 11. Limit block; 12. Connection ring; 13. Connection seat; 14. Diffusion plate; 15. Fixed block; 16. L-shaped block; 17. Connecting shaft; 18. Fixed seat; 19. Shock-absorbing spring; 20. Damping telescopic rod; 21. Shock-absorbing pad. Specific embodiments

[0025] The following further describes in detail the embodiments of the present invention in conjunction with the drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0026] Please refer to Figure 1 - Figure 7, the present invention provides a fire-fighting wireless liquid level sensor, which includes a liquid level sensor body. The liquid level sensor body includes a housing 1, a connecting wire 2 and a detection probe 3. A protective shell 6 for protection is arranged below the housing 1. Two connecting plates 7 are arranged inside the protective shell 6. A connecting ring 12 is arranged inside the two connecting plates 7. Two connecting seats 13 are fixedly connected to the circumferential side of the connecting ring 12. Two diffusion plates 14 are arranged on the opposite sides of the two connecting seats 13. Fixed blocks 15 are arranged below the two pairs of diffusion plates 14. A damping telescopic rod 20 is arranged between each diffusion plate 14 and each fixed block 15. A shock-absorbing spring 19 is movably sleeved on the circumferential side of each damping telescopic rod 20. A connecting block 5 is movably clamped above the protective shell 6. A protective mesh cover 4 is arranged on the circumferential side of the detection probe 3. A cleaning scraping ring 9 is fixedly connected inside the protective mesh cover 4. A threaded ring 8 is fixedly connected to the left surface of the detection probe 3. The threaded ring 8 is threadedly sleeved with the protective mesh cover 4. During use, first, a suitable position needs to be selected for installing the sensor according to the measurement requirements, mostly at the top or side openings of containers such as fire-fighting water tanks and pools, and the detection probe 3 should be in a position where it is completely immersed in the liquid and not easily affected by water flow impact and debris interference. The detection probe 3 will sense the pressure exerted by the liquid. The change in the liquid level will cause a change in the pressure received by the detection probe 3. The pressure signal sensed by the detection probe 3 will be converted into an electrical signal by the circuit inside the sensor, and after signal processing such as amplification and filtering, an electrical signal related to the liquid level height can be obtained. Finally, the liquid level data represented by this electrical signal is sent out through the wireless communication module.

[0027] Two limit blocks 11 are fixedly connected to the inner wall of the protective shell 6. Card slots 10 are formed on both the left and right sides of the connecting block 5. The two card slots 10 are respectively movably connected to the two limit blocks 11. The upper connecting plate 7 of the two connecting plates 7 is fixedly connected to the connecting block 5. In response to the multi-vibrational environment at the site, the vibration force is transmitted to the connecting plate 7 through the protective shell 6. Affected by the vibration, the connecting plate 7 will drive the two pairs of fixing blocks 15 fixed thereto to move upward. During the movement of the two pairs of fixing blocks 15, the two pairs of diffusion plates 14 rotatably connected thereto will be driven to move. The two pairs of diffusion plates 14 are rotatably connected to the two connecting seats 13. As the distance between the diffusion plates 14 and the fixing blocks 15 changes, a set of damping telescopic rods 20 will be driven to expand and contract. When the damping telescopic rods 20 expand and contract, the piston rods provided therein move within the cylinder barrels, thereby driving the viscous liquid to flow through the pores. When the liquid passes through the pores, it will be subject to resistance, and this resistance will impede the flow of the liquid, converting the kinetic energy of the fluid into heat energy, thereby absorbing this part of the vibration energy and further improving the damping effect. When the connecting plate 7 moves upward, it will fit with the other connecting plate 7, and a damping pad 21 is fixed between the two. When the two pairs of damping pads 21 come into contact, elastic deformation will occur, converting the vibration energy into elastic potential energy, thereby reducing the amplitude of the vibration transmitted to the sensor. Moreover, a set of damping springs 19 will also be compressed to absorb the vibration force, dispersing the pressure onto a set of diffusion plates 14. By dispersing the vibration force, these vibrations can be effectively reduced, keeping the sensor stable, thereby improving the accuracy of liquid level measurement. Additionally, through damping, the impact force on the internal components of the sensor can be reduced, thereby extending their service life.

[0028] Two L-shaped blocks 16 are fixedly connected to the annular side surface of the connecting ring 12. The two L-shaped blocks 16 are fixedly connected to the upper connecting plate 7 among the two connecting plates 7. Two shock pads 21 are fixedly connected to the opposite surfaces of the two connecting plates 7. Two connecting shafts 17 are fixedly connected to the opposite surfaces of the two pairs of diffusion plates 14 respectively. The two connecting shafts 17 are respectively rotatably connected to the two connecting seats 13. Fixed seats 18 are fixedly connected to the opposite surfaces of a group of diffusion plates 14 and a group of fixing blocks 15 respectively. The two groups of fixed seats 18 are respectively fixedly connected to a group of damping telescopic rods 20 and a group of shock springs 19. A protective mesh cover 4 is arranged on the surface of the detection probe 3 for protection, which can prevent damage caused by the impact of foreign objects from the outside. The fire-fighting water may contain impurities, such as rust and sediment in the water tank or pool. The protective mesh cover 4 can filter out these large-particle impurities and prevent them from adhering to the surface of the detection probe 3 and affecting the measurement accuracy. The protective mesh cover 4 is fixed by a threaded ring 8, and the installation and removal operations are relatively simple. When the staff rotates the protective mesh cover 4 counterclockwise in the way of threaded connection and removes it from the surface of the detection probe 3, the cleaning scraping ring 9 arranged in the protective mesh cover 4 contacts the surface of the detection probe 3. Due to the rotational movement of the protective mesh cover 4 to take it out, the cleaning scraping ring 9 will slide and scrape along the surface of the detection probe 3, scraping off the dirt on the surface of the detection probe 3. By timely cleaning the dirt and corrosive substances on the surface of the detection probe 3, the long-term damage to the detection probe 3 caused by these substances can be prevented. The design of the cleaning scraping ring 9 makes the cleaning work of the detection probe 3 simple. The staff does not need to carry additional complex cleaning tools, which can greatly improve the work efficiency in the daily maintenance of fire-fighting facilities and reduce the risk of damage to the detection probe 3 caused by improper cleaning at the same time.

[0029] Working principle:

[0030] First step, during use, first select a suitable position to install the sensor according to the measurement requirements. Mostly at the top or side openings of containers such as fire fighting water tanks and pools, and the detection probe 3 should be in a position where it is completely immersed in the liquid and not easily affected by water flow impact and debris interference. The detection probe 3 will sense the pressure exerted by the liquid. The change in the liquid level will cause a change in the pressure received by the detection probe 3. The pressure signal sensed by the detection probe 3 will be converted into an electrical signal by the circuit inside the sensor. After signal processing such as amplification and filtering, an electrical signal related to the liquid level height can be obtained. Finally, the liquid level data represented by this electrical signal is sent out through the wireless communication module. In the case of a multi-vibrating environment on site, the vibration force will be transmitted to the connecting plate 7 through the protective shell 6. The connecting plate 7 affected by the vibration will drive the two pairs of fixing blocks 15 fixed to it to move upward. During the movement of the two pairs of fixing blocks 15, they will drive the two pairs of diffusion plates 14 rotatably connected to them to move. The two pairs of diffusion plates 14 are rotatably connected to the two connecting seats 13. As the distance between the diffusion plates 14 and the fixing blocks 15 changes, it will drive a set of damping telescopic rods 20 to expand and contract. When the damping telescopic rod 20 expands and contracts, the piston rod arranged inside it moves in the cylinder barrel, thereby driving the viscous liquid to flow through the pores. The liquid will be resisted when passing through the pores. This resistance will impede the flow of the liquid, convert the kinetic energy of the fluid into heat energy, and thus absorb this part of the vibration energy, further improving the damping effect. When the connecting plate 7 moves upward, it will fit with another connecting plate 7, and a damping pad 21 is fixed between the two. The two pairs of damping pads 21 will undergo elastic deformation when they come into contact, converting the vibration energy into elastic potential energy, thereby reducing the vibration amplitude transmitted to the sensor. And a set of damping springs 19 will also be compressed to absorb the vibration force and disperse the pressure to a set of diffusion plates 14. By dispersing the vibration force, these vibrations can be effectively reduced, keeping the sensor stable, thereby improving the accuracy of liquid level measurement. And through damping, the impact force on the internal components of the sensor can be reduced, thereby extending their service life.

[0031] In the second step, a protective mesh cover 4 is provided on the surface of the detection probe 3 for protection, which can prevent damage caused by the impact of foreign objects from the outside. The fire-fighting water may contain impurities, such as rust and sediment in water tanks or pools. The protective mesh cover 4 can filter out these large-particle impurities and prevent them from adhering to the surface of the detection probe 3 and affecting the measurement accuracy. The protective mesh cover 4 is fixed by a threaded ring 8, and the installation and removal operations are relatively simple. When the staff rotates the protective mesh cover 4 counterclockwise in the way of threaded connection and removes it from the surface of the detection probe 3, the cleaning scraping ring 9 provided in the protective mesh cover 4 contacts the surface of the detection probe 3. Due to the rotational movement of the protective mesh cover 4 to take it out, the cleaning scraping ring 9 will slide and scrape along the surface of the detection probe 3 to scrape off the dirt on the surface of the detection probe 3. By timely cleaning the dirt and corrosive substances on the surface of the detection probe 3, it can prevent these substances from causing long-term damage to the detection probe 3. The design of the cleaning scraping ring 9 makes the cleaning work of the detection probe 3 simple, and the staff does not need to carry additional complex cleaning tools. This can greatly improve the work efficiency in the daily maintenance of fire-fighting facilities and reduce the risk of damage to the detection probe 3 caused by improper cleaning at the same time.

[0032] The examples of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention so as to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A fire wireless liquid level sensor, comprising a liquid level sensor body, the liquid level sensor body including a housing (1), a connecting wire (2) and a detection probe (3), characterized in that: A protective shell (6) for protection is provided below the outer shell (1). Two connecting plates (7) are provided inside the protective shell (6). A connecting ring (12) is provided inside the two connecting plates (7). Two connecting seats (13) are fixedly connected to the circumferential side of the connecting ring (12); Wherein, two diffusion plates (14) are provided on the opposite sides of the two connecting seats (13). Fixed blocks (15) are provided below the two pairs of diffusion plates (14). A damping telescopic rod (20) is provided between each diffusion plate (14) and each fixed block (15). A shock-absorbing spring (19) is movably sleeved on the circumferential side of each damping telescopic rod (20). A connecting block (5) is movably clamped above the protective shell (6). A protective mesh cover (4) is provided on the circumferential side of the detection probe (3). A cleaning scraping ring (9) is fixedly connected inside the protective mesh cover (4).

2. The fire wireless liquid level sensor according to claim 1, characterized in that, A threaded ring (8) is fixedly connected to the left surface of the detection probe (3); Wherein, the threaded ring (8) is threadedly sleeved with the protective mesh cover (4).

3. The fire-fighting wireless liquid level sensor according to claim 1, wherein, Two limiting blocks (11) are fixedly connected to the inner wall of the protective shell (6).

4. The fire-fighting wireless liquid level sensor according to claim 3, characterized in that, Card slots (10) are provided on both the left and right sides of the connecting block (5); Wherein, the two card slots (10) are respectively movably connected to the two limiting blocks (11).

5. The fire-fighting wireless liquid level sensor according to claim 1, wherein The upper connecting plate (7) of the two connecting plates (7) is fixedly connected to the connecting block (5).

6. The fire-fighting wireless liquid level sensor according to claim 1, wherein Two L-shaped blocks (16) are fixedly connected to the circumferential side of the connecting ring (12); Wherein, the two L-shaped blocks (16) are fixedly connected to the upper connecting plate (7) of the two connecting plates (7).

7. The fire-fighting wireless liquid level sensor according to claim 1, characterized in that, Two shock-absorbing pads (21) are fixedly connected to the opposite surfaces of the two connecting plates (7).

8. The fire-fighting wireless liquid level sensor according to claim 1, wherein Two connecting shafts (17) are respectively fixedly connected to the opposite surfaces of the two pairs of diffusion plates (14).

9. The fire-fighting wireless liquid level sensor according to claim 8, wherein, The two connecting shafts (17) are respectively rotatably connected to the two connecting seats (13).

10. The fire-fighting wireless liquid level sensor according to claim 1, wherein Fixed seats (18) are fixedly connected to the opposite surfaces of a group of diffusion plates (14) and a group of fixed blocks (15); Wherein, the two groups of fixed seats (18) are respectively fixedly connected to a group of damping telescopic rods (20) and a group of shock-absorbing springs (19).

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