Detachable anti-blocking liquid level meter

Abstract

The utility model discloses a detachable anti-blocking liquid level meter, which relates to the technical field of liquid level sensors and comprises a connecting cylinder, the outer surface of the connecting cylinder is in threaded connection with a protective cover, the bottom surface of the protective cover is provided with a first liquid inlet and four second liquid inlets for liquid to enter and exit, and a filter screen is arranged in the protective cover. The inner wall of the connecting cylinder is in threaded connection with a sealing block. According to the liquid level sensor, the filter screen is used for filtering liquid entering the liquid level sensor through the liquid inlet hole, so that impurities in the liquid are prevented from obstructing a detection area of a detection element of the liquid level sensor, the possibility of a detection blind area is reduced, and the detection precision is ensured; the liquid level sensor is simple in structure and convenient to use, the speed of liquid entering the liquid level sensor can be increased, the detection efficiency of the liquid level sensor is improved, the detection end of the liquid level sensor is protected when the liquid level sensor is not used, the influence of external dust and other impurities on a detection element is avoided, and meanwhile the liquid level sensor can be conveniently disassembled and overhauled.

Description

Technical Field

[0001] This utility model relates to the field of liquid level sensor technology, specifically a detachable anti-clogging liquid level gauge. Background Technology

[0002] A liquid level sensor (static pressure level gauge / level transmitter / water level sensor) is a pressure sensor that measures liquid level. Liquid level sensors are divided into two categories: one is contact type, including single-flange static pressure / double-flange differential pressure level transmitters, float-type level transmitters, magnetic level transmitters, submersible level transmitters, electric internal float level transmitters, electric float level transmitters, capacitive level transmitters, magnetostrictive level transmitters, servo level transmitters, etc.; the second category is non-contact type, including ultrasonic level transmitters, radar level transmitters, etc.

[0003] In existing liquid level sensors, liquid enters through the inlet and the internal sensing element detects the static pressure. The static pressure is then converted into an electrical signal, which is further compensated for by temperature and linearly corrected before being transmitted to a display for liquid level indication. However, the liquid enters the sensor slowly through the inlet, and impurities in the liquid can easily enter the sensor along with the liquid, obstructing the detection area of ​​the sensing element and creating a blind spot. To address these issues, we provide a liquid level sensor that solves these problems. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a detachable anti-clogging level gauge.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a detachable anti-clogging level gauge, comprising a connecting cylinder, a protective cover threadedly connected to the outer surface of the connecting cylinder, a first inlet and four second inlets for liquid entry and exit on the bottom surface of the protective cover, a filter screen inside the protective cover, a sealing block threadedly connected to the inner wall of the connecting cylinder, a detection element for liquid level detection installed on the inner wall of the connecting cylinder, a venting cable electrically connected to the signal transmission end of the detection element penetrating the sealing block and extending above the sealing block, a display being electrically connected to the end of the venting cable away from the detection element, and a protective component for improving the protective performance of the detachable anti-clogging level gauge provided outside the protective cover.

[0006] Furthermore, the four second liquid inlets are arranged in a circular pattern on the bottom surface of the protective cover, and the protrusions at the bottom of the protective cover are also arranged in a circular pattern on the bottom surface of the protective cover. Through the coordinated arrangement of the above structures, the speed at which liquid enters the removable anti-clogging level gauge can be accelerated, thereby improving the detection efficiency of the removable anti-clogging level gauge.

[0007] Furthermore, the protective assembly includes a protective sleeve slidably connected to the protective cover and two limiting rods. The protective sleeve is slidably connected to the limiting rods, and a fixing block is fixedly connected to the end of each limiting rod away from the protective cover. A return spring is sleeved on the outer surface of each limiting rod, and the two ends of the return spring are fixed to the protective sleeve and the fixing block, respectively. Through the cooperation between the above structures, external dust and other impurities can be prevented from entering the liquid level detection chamber through the filter hole at the bottom of the protective cover, thereby avoiding any impact on the detection element.

[0008] Furthermore, the inner wall of the protective cover is provided with a first sealing gasket, the outer surface of the sealing block is fitted with a second sealing gasket, and the protective cover is provided with a groove for accommodating the first sealing gasket. The first sealing gasket can improve the sealing performance at the connection between the connecting cylinder and the protective cover, thereby improving the detection accuracy of the detachable anti-clogging level gauge.

[0009] Furthermore, a reinforcing block is fixedly connected to the outer surface of the ventilation cable, and the reinforcing block is fixedly connected to the sealing block. By setting the reinforcing block, the stability of the connection between the detection element and the ventilation cable can be improved, thereby avoiding the impact on the transmission of electrical signals.

[0010] Furthermore, the outer surface of the display is fixedly connected to two symmetrically arranged mounting blocks, and the front of the mounting blocks is provided with mounting holes. The fixing bolts are passed through the mounting holes on the mounting blocks and screwed into the reserved holes opened at the display mounting position to install and fix the display.

[0011] Compared with existing technologies, this detachable anti-clogging level gauge has the following advantages:

[0012] 1. This utility model utilizes a filter screen to filter the liquid entering the liquid level sensor through the inlet hole, thereby preventing impurities in the liquid from obstructing the detection area of ​​the liquid level sensor's detection element, thus reducing the possibility of detection blind spots and ensuring detection accuracy. It can also accelerate the speed at which liquid enters the liquid level sensor, thereby improving the detection efficiency of the liquid level sensor. Furthermore, it protects the detection end of the liquid level sensor when it is not in use, thereby preventing external dust and other impurities from affecting the detection element, and at the same time, it facilitates the disassembly and maintenance of the liquid level sensor.

[0013] 2. By setting a first sealing gasket and a second sealing gasket, this utility model can improve the sealing performance of the liquid level sensor, thereby improving the detection accuracy of the liquid level sensor. By setting a reinforcing block, the stability of the connection between the detection element and the ventilation cable can be improved, thereby avoiding the impact on the transmission of electrical signals. By setting a mounting block, the display can be easily installed and fixed. Attached Figure Description

[0014] Figure 1 This is a front view of the three-dimensional structure of this utility model;

[0015] Figure 2 This is a partial structural cross-sectional view of the present invention;

[0016] Figure 3 This is a schematic diagram of the partial explosion structure of this utility model. Figure 1 ;

[0017] Figure 4 This is a schematic diagram of the partial explosion structure of this utility model. Figure 2 ;

[0018] Figure 5 This is a schematic diagram of the protective cover structure of this utility model;

[0019] Figure 6 This is a schematic diagram of the structure and connection of the protective component of this utility model.

[0020] In the diagram: 1. Connecting cylinder; 2. Protective cover; 3. Sealing block; 4. Filter screen; 5. Detection element; 6. Ventilation cable; 7. Display; 8. First liquid inlet; 901. Protective sleeve; 902. Limiting rod; 903. Fixing block; 904. Return spring; 10. First sealing gasket; 11. Second sealing gasket; 12. Reinforcing block; 13. Mounting block; 14. Second liquid inlet. Detailed Implementation

[0021] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0022] As described in the background art, the liquid enters the liquid level sensor through the inlet hole at a slow speed, and impurities in the liquid can easily enter the liquid level sensor at the same time, causing obstruction to the detection area and resulting in a detection blind zone. Therefore, this embodiment provides a liquid level sensor.

[0023] See Figures 1 to 6 This embodiment proposes a detachable anti-clogging level gauge, including a connecting cylinder 1. A protective cover 2 is threadedly connected to the outer surface of the connecting cylinder 1. The bottom surface of the protective cover 2 has a first liquid inlet 8 for liquid entry and exit and four second liquid inlets 14. The four second liquid inlets 14 are evenly distributed in a circular arrangement on the bottom surface of the protective cover 2. The protrusions at the bottom of the protective cover 2 are evenly distributed in a circular arrangement on the bottom surface of the protective cover 2.

[0024] By setting a first liquid inlet 8 and four second liquid inlets 14, the liquid to be tested can easily enter the interior of the protective cover 2, and large particulate impurities can be initially filtered and blocked. At the same time, the protrusion at the bottom of the protective cover 2 can prevent the liquid level sensor from blocking the first liquid inlet 8 and the four second liquid inlets 14 when it is at the bottom, thereby speeding up the speed at which the liquid enters the interior of the detachable anti-clogging liquid level gauge and thus improving the detection efficiency of the detachable anti-clogging liquid level gauge.

[0025] The protective cover 2 is equipped with a filter screen 4. The inner wall of the connecting cylinder 1 is threaded with a sealing block 3. The inner wall of the connecting cylinder 1 is equipped with a detection element 5 for liquid level detection. The signal transmission end of the detection element 5 is electrically connected to a ventilation cable 6 that passes through the sealing block 3 and extends to the top of the sealing block 3. The end of the ventilation cable 6 away from the detection element 5 is electrically connected to a display 7.

[0026] The bottom of the connecting cylinder 1 can be sealed by the protective cover 2 and the detection element 5 to form a liquid level detection chamber. The top of the connecting cylinder 1 can be sealed by the sealing block 3 to form a storage chamber for the liquid level detection element 5. The filter screen 4 is located between the protective cover 2 and the detection element 5 and defines its position. The filter screen 4 can filter the liquid entering the liquid level sensor through the liquid inlet hole at the bottom of the protective cover 2, thereby preventing impurities in the liquid from obstructing the detection area of ​​the detection element 5 of the liquid level sensor, thus reducing the possibility of detection blind spots and ensuring detection accuracy.

[0027] The detection element 5 uses an isolated diffused silicon sensitive element or a ceramic capacitive pressure sensitive sensor. The vent cable 6 uses a special cable with a vent conduit in the middle and a special sealing technology, which not only ensures the watertightness of the liquid level sensor, but also allows the reference pressure chamber to communicate with the ambient pressure, thereby ensuring high accuracy and high stability of the measurement. The static pressure of the liquid can be detected by the detection element 5, and then the static pressure is converted into an electrical signal. After temperature compensation and linear correction, it is converted into a standard electrical signal and transmitted to the display 7 through the vent cable 6 for liquid level height display.

[0028] Two symmetrically arranged mounting blocks 13 are fixedly connected to the outer surface of the display 7. The front of the mounting block 13 has a mounting hole. The fixing bolt is passed through the mounting hole on the mounting block 13 and screwed into the reserved hole opened at the installation position of the display 7 to install and fix the display 7.

[0029] The inner wall of the protective cover 2 is provided with a first sealing gasket 10, and the outer surface of the sealing block 3 is fitted with a second sealing gasket 11. (See also...) Figure 2 and Figure 4It is known that the protective cover 2 has a groove for accommodating the first sealing gasket 10. The first sealing gasket 10 can improve the sealing performance at the connection between the connecting cylinder 1 and the protective cover 2, and can also improve the sealing performance at the connection between the connecting cylinder 1 and the sealing block 3, thereby improving the detection accuracy of the liquid level sensor.

[0030] A reinforcing block 12 is fixedly connected to the outer surface of the ventilation cable 6, and the reinforcing block 12 is fixedly connected to the sealing block 3. The reinforcing block 12 is composed of an annular block and a cylindrical ring, which can improve the stability of the connection between the detection element 5 and the ventilation cable 6, thereby avoiding the impact on the transmission of electrical signals.

[0031] The protective cover 2 is provided with a protective component to improve the protection performance of the liquid level sensor. The protective component includes a protective sleeve 901 that is slidably connected to the protective cover 2 and two limiting rods 902. The protective sleeve 901 is slidably connected to the limiting rods 902. A fixing block 903 is fixedly connected to one end of each limiting rod 902 away from the protective cover 2. A return spring 904 is sleeved on the outer surface of each limiting rod 902. The two ends of the return spring 904 are fixed to the protective sleeve 901 and the fixing block 903, respectively.

[0032] By sliding the limiting rod 902 into the inner wall of the protective sleeve 901 and the protective cover 2 respectively, the position of the limiting rod 902 can be limited, thereby preventing external dust and other impurities from entering the liquid level detection chamber through the filter hole at the bottom of the protective cover 2, thus avoiding affecting the detection element 5. Furthermore, the limiting rod 902 can be limited and supported by the fixing block 903 and the return spring 904, thereby preventing the limiting rod 902 from sliding out of the inner wall of the protective sleeve 901 and the protective cover 2 on its own.

[0033] The components in the accompanying drawings of this utility model are for styling reference only and are not specific dimensional standards. The specific dimensions are determined according to the actual production requirements, and the materials of each component can be replaced accordingly based on actual needs.

[0034] All electrical components in this invention are commercially available, conventional equipment known to those skilled in the art. Models can be selected or customized according to actual needs. The setting method, installation method, and electrical connection method can be easily understood by those skilled in the art by following the instructions for use, and will not be described in detail here.

[0035] Working principle: When using the detachable anti-clogging level gauge, the two fixed blocks 903 can be pulled in the opposite direction, which can drive the limiting rod 902 to slide in the inner wall of the protective cover 2 and the protective sleeve 901, and stretch the return spring 904 to produce elastic deformation. When the limiting rod 902 slides out completely from the inner wall of the protective cover 2 and the protective sleeve 901, the protective sleeve 901 can be removed from the protective cover 2. Then, the level sensor is put into the liquid to be used. The liquid can enter the interior of the protective cover 2 through the first liquid inlet 8 and the four second liquid inlets 14, and can initially filter and block large particulate impurities. At the same time, the protrusion at the bottom of the protective cover 2 can prevent the first liquid inlet 8 and the four second liquid inlets 14 from being blocked when the level sensor is at the bottom, thereby speeding up the speed at which the liquid enters the interior of the detachable anti-clogging level gauge, thereby improving the detection efficiency of the detachable anti-clogging level gauge.

[0036] Meanwhile, the filter screen 4 can filter the liquid entering the liquid level sensor through the inlet hole at the bottom of the protective cover 2, thereby preventing impurities in the liquid from obstructing the detection area of ​​the detection element 5 of the liquid level sensor, thus reducing the possibility of detection blind spots and ensuring detection accuracy. The detection element 5 can detect the static pressure of the liquid entering the liquid level detection chamber, and then convert the static pressure into an electrical signal. After temperature compensation and linear correction, it is converted into a standard electrical signal and transmitted to the display 7 through the ventilation cable 6 for liquid level display. After use, the protective cover 2 can be protected again with the protective sleeve 901 to prevent external dust and other impurities from entering the liquid level detection chamber through the filter hole at the bottom of the protective cover 2, thereby avoiding affecting the detection element 5. The liquid level sensor can also be easily disassembled and repaired.

Claims

1. A detachable anti-blocking liquid level gauge comprising a connecting cylinder (1), characterized in that: The outer surface of the connecting cylinder (1) is threadedly connected with a protective cover (2), the bottom surface of the protective cover (2) is provided with a first liquid inlet (8) and four second liquid inlets (14) for liquid inlet and outlet, the inside of the protective cover (2) is provided with a filter screen (4), the inner wall of the connecting cylinder (1) is threadedly connected with a closing block (3), the inner wall of the connecting cylinder (1) is mounted with a detection element (5) for liquid level detection, the signal transmission end of the detection element (5) is electrically connected with a ventilation cable (6) penetrating through the closing block (3) and extending above the closing block (3), the end of the ventilation cable (6) away from the detection element (5) is electrically connected with a display (7), and the outside of the protective cover (2) is provided with a protection assembly for improving the detachable anti-blocking performance of the liquid level meter.

2. A removable anti-clogging level gauge according to claim 1, characterized in that: The four second liquid inlets (14) are arranged in a circle and uniformly distributed on the bottom surface of the protective cover (2), and the protrusions on the bottom of the protective cover (2) are arranged in a circle and uniformly distributed on the bottom surface of the protective cover (2).

3. A removable anti-clogging level gauge according to claim 1, characterized in that: The protection assembly comprises a protective sleeve (901) and two limiting rods (902) in sliding connection with the protective cover (2), the protective sleeve (901) is in sliding connection with the limiting rods (902), one end of each limiting rod (902) away from the protective cover (2) is fixedly connected with a fixed block (903), the outer surface of each limiting rod (902) is sleeved with a reset spring (904), and both ends of the reset spring (904) are fixedly connected with the protective sleeve (901) and the fixed block (903).

4. A removable anti-clogging level gauge according to claim 1, characterized in that: The inner wall of the protective cover (2) is provided with a first sealing gasket (10), and the outer surface of the closing block (3) is sleeved with a second sealing gasket (11).

5. A removable anti-clogging level gauge according to claim 1, characterized in that: The outer surface of the ventilation cable (6) is fixedly connected with a reinforcing block (12), and the reinforcing block (12) is fixedly connected with the closing block (3).

6. A removable anti-clogging level gauge according to claim 1, characterized in that: The outer surface of the display (7) is fixedly connected with two symmetrically arranged mounting blocks (13), and the front surface of the mounting block (13) is provided with a mounting hole.

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