CN214407695U

CN214407695U - Explosion-proof liquid level detector of no lead wire formula

Info

Publication number: CN214407695U
Application number: CN202120589825.7U
Authority: CN
Inventors: 孙金龙; 张爱杰
Original assignee: Beijing Allway Instrument Co ltd
Current assignee: Beijing Allway Instrument Co ltd
Priority date: 2021-03-17
Filing date: 2021-03-17
Publication date: 2021-10-15
Anticipated expiration: 2031-03-17

Abstract

The utility model relates to a sensor, in particular to be applied to induction system of liquid level position detection in the container. A leadless explosion-proof liquid level detector, comprising: an alarm and a sensor; the alarm is provided with an inductive switch; the sensor is arranged in the container and can move up and down along with the position of the liquid level in the container, when the position of the liquid level reaches a set height, the sensor moves up to trigger the inductive switch, the alarm gives an alarm, and when the position of the liquid level descends, the sensor moves down to be far away from the inductive switch, and the alarm releases the alarm. The utility model provides a produce the signal through the response between sensor and the alarm, need not the signal line and connect, guaranteed the reliability of detection achievement, the utility model discloses especially, close the liquid level detection who is suitable for volatilizable, inflammable, explosive liquid.

Description

Explosion-proof liquid level detector of no lead wire formula

Technical Field

The utility model relates to a sensor, in particular to be applied to induction system of liquid level position detection in the container.

Background

The detection of the level of liquid in the container is very important and can only be detected by a sensor if the level of liquid in the container cannot be visually detected when liquid is discharged into the container. When the liquid level reaches the warning height, the sensor is required to give an alarm to an operator in time, otherwise, the liquid overflows the container to cause environmental hazard or greater life and property loss.

At present, the detection of the liquid level of flammable, explosive and volatile liquid in a sealed container mainly comprises two methods:

the first method comprises the following steps: the magnetic liquid level floating ball reed pipe is of a lead type; as shown in figure 1, a reed switch of a magnetic sensor is sealed in a detection rod, a magnetic floating ball capable of sliding up and down is installed outside the detection rod, when the liquid level reaches an alarm position, the floating ball floats and triggers the reed switch in the detection rod, and the reed switch is connected with an alarm through a signal line to trigger the alarm. This method has the following disadvantages: 1) the electric wire between the magnetic sensitive reed switch and the alarm is easy to break; 2) the signal line and the alarm interface are easy to corrode; 3) the magnetic sensitive dry reed pipe and the signal wire are sealed in the detection rod and immersed in liquid, when the sealing rod is damaged, the circuit is in contact with the liquid, and the risk of igniting and detonating the liquid is easily caused.

And the second method comprises the following steps: a capacitor sensing type; as shown in figure 2, a capacitive sensor is arranged on the outer side of the container, and when the liquid level reaches an alarm position, the capacitive sensor inputs a type signal line to trigger alarm. This method has the following disadvantages: 1) the material of the used container is limited, and only glass, plastic and other materials can be used; 2) the container needs to be replaced frequently, and the capacitor sensor is difficult to fix with the outer wall of the container; 3) when the capacitive sensor is adopted, the whole alarm circuit is in a real-time power-on state, and the consumption of the electric quantity of the battery is large.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: aiming at the defects of the prior art, the non-lead type explosion-proof liquid level detector is provided.

The technical scheme of the utility model is that: a leadless explosion-proof liquid level detector, comprising: an alarm and a sensor; the alarm is provided with an inductive switch; the sensor is arranged in the container and can move up and down along with the position of the liquid level in the container, when the position of the liquid level reaches a set height, the sensor moves up to trigger the inductive switch, the alarm gives an alarm, and when the position of the liquid level descends, the sensor moves down to be far away from the inductive switch, and the alarm releases the alarm. The alarm is preferably an audible and visual alarm.

On the basis of the scheme, the container is further provided with a sealing cover, and the alarm and the sensor are both arranged on the sealing cover; the sealing cover is provided with an alarm mounting hole and a sensor mounting hole; the alarm mounting hole and the sensor mounting hole are opposite up and down but are not communicated; the alarm is installed in the alarm mounting hole, and the sensor is installed in the sensor mounting hole.

In the above-mentioned scheme, it is specific, the alarm includes: the alarm device comprises a shell provided with an end cover, an alarm driving circuit board arranged in the shell, a battery used for supplying power to the alarm driving circuit board, and an inductive switch used for communicating the alarm driving circuit board and the battery; the shell is fixedly installed in the alarm installation hole, the alarm is not provided with a signal line interface and is in a sealed state, and the corrosion resistance is high. Further, the inductive switch is a magnetic sensitive switch. The end cover and the shell are preferably made of HDPE, PTFE, PP, PVDF and other translucent or transparent materials. The end cover is connected with the shell in a sealing mode through threads, and a circuit in the alarm is in a sealing state, so that the alarm is isolated from being contacted with external combustible gas, and the detector has explosion-proof capacity.

In the foregoing solution, specifically, the sensor includes: the floating ball, the magnet matched with the inductive switch and the connecting rod for connecting the floating ball and the magnet; the magnet is arranged in the fixed seat, the fixed seat is fixedly arranged in the sensor mounting hole, the floating ball is arranged in the container, and the sensor is not provided with any circuit device, so that the danger of explosion is avoided. Furthermore, the floating ball, the connecting rod and the fixed seat are preferably made of HDPE, PTFE, PP and PVDF materials.

Has the advantages that: the utility model provides a produce the signal through the response between sensor and the alarm, need not the signal line and connect, guaranteed the reliability of detection achievement, the utility model discloses especially, close the liquid level detection who is suitable for volatilizable, inflammable, explosive liquid.

Drawings

FIG. 1 is a schematic diagram of a magnetic liquid level float reed switch lead wire type detector in the background art;

FIG. 2 is a schematic diagram of a prior art capacitance sensor probe;

FIG. 3 is a schematic structural view of the present invention in a non-alarm state;

FIG. 4 is a schematic structural view of the utility model in an alarm state;

fig. 5 is a schematic structural view of the alarm of the present invention;

fig. 6 is a schematic structural diagram of the middle sensor of the present invention.

Wherein: 1-alarm, 1.1-inductive switch, 1.2-alarm drive circuit board, 1.3-battery, 1.4-shell, 1.5-end cover, 2-sensor, 2.1-floating ball, 2.2-connecting rod, 2.3-magnet, 2.4-fixing seat, 3-sealing cover and 4-container.

Detailed Description

Example 1, referring to fig. 3 and 4, a leadless explosion-proof liquid level detector comprises: an alarm 1 and a sensor 2; the alarm 1 is provided with an inductive switch 1.1; the sensor 2 is arranged in the container 4 and can move up and down along with the position of the liquid level in the container 4, when the position of the liquid level reaches a set height, the sensor 2 moves up to trigger the inductive switch 1.1, the alarm 1 gives an alarm, and when the position of the liquid level descends, the sensor 2 moves down to be far away from the inductive switch 1.1, and the alarm 1 releases the alarm. The alarm 1 is preferably an audible and visual alarm.

In embodiment 2, the configuration of the alarm 1 and the sensor 2 is specifically limited based on embodiment 1.

The container 4 is provided with a sealing cover 3, and the alarm 1 and the sensor 2 are both arranged on the sealing cover 3; the sealing cover 3 is provided with an alarm mounting hole and a sensor mounting hole; the alarm mounting hole and the sensor mounting hole are opposite up and down but are not communicated; alarm 1 is installed in the alarm mounting hole, and sensor 2 is installed in the sensor mounting hole.

Referring to fig. 5, the alarm 1 comprises: the alarm device comprises a shell 1.4 provided with an end cover 1.5, an alarm driving circuit board 1.2 arranged in the shell 1.4, a battery 1.3 used for supplying power to the alarm driving circuit board 1.2, and an inductive switch 1.1 used for communicating the alarm driving circuit board 1.2 and the battery 1.3; the shell 1.4 is fixedly arranged in the alarm mounting hole. Furthermore, the inductive switch 1.1 is a magnetic sensitive switch. The end cap 1.5 and the housing 1.4 are preferably made of a translucent or transparent material such as HDPE, PTFE, PP, PVDF, etc. The end cover 1.5 is connected with the shell 1.4 through thread sealing.

Referring to fig. 6, the sensor 2 includes: the floating ball 2.1 is used for a magnet 2.3 matched with the inductive switch 1.1 and a connecting rod 2.2 connecting the floating ball 2.1 and the magnet 2.3; magnet 2.3 is arranged in fixing base 2.4, and fixing base 2.4 fixed mounting is in the sensor mounting hole, and floater 2.1 is arranged in container 4. Furthermore, the floating ball 2.1, the connecting rod 2.2 and the fixed seat 2.4 are preferably made of HDPE, PTFE, PP or PVDF materials.

When the alarm works, when the liquid level in the container 4 reaches a certain height, the floating ball 2.1 floats upwards to push the connecting rod 2.2 and the magnet 2.3 above the connecting rod 2.2 to move upwards, when the magnet 2.3 approaches the induction switch 1.1 in the alarm 1, the induction switch 1.1 is in a conducting state under the action of a magnetic field, at the moment, the battery 1.3 supplies power to the alarm driving circuit board 1.2, and the alarm 1 gives out audible and visual alarm.

When the liquid level in the container 4 drops to a certain position and the magnet 2.3 is far away from the inductive switch 1.1, the power supply of the alarm driving circuit board 1.2 is disconnected, and the alarm does not work at the moment.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A leadless explosion-proof liquid level detector, comprising: an alarm (1) and a sensor (2); the method is characterized in that: the alarm (1) is provided with an inductive switch (1.1); sensor (2) set up in container (4), can follow liquid level position reciprocates in container (4), reaches the settlement height when the liquid level position, sensor (2) move up the trigger inductive switch (1.1), alarm (1) report to the police, descend when the liquid level position, sensor (2) move down and keep away from inductive switch (1.1), alarm (1) are relieved and are reported to the police.

2. The leadless explosion-proof liquid level detector of claim 1, wherein: the container (4) is provided with a sealing cover (3); an alarm mounting hole and a sensor mounting hole are formed in the sealing cover (3); the alarm mounting hole and the sensor mounting hole are opposite up and down but are not communicated; the alarm (1) is installed in the alarm installation hole, and the sensor (2) is installed in the sensor installation hole.

3. The leadless explosion-proof liquid level detector of claim 2, wherein: the alarm (1) comprises: the alarm device comprises a shell (1.4) provided with an end cover (1.5), an alarm driving circuit board (1.2) arranged in the shell (1.4), a battery (1.3) used for supplying power to the alarm driving circuit board (1.2), and an inductive switch (1.1) used for communicating the alarm driving circuit board (1.2) and the battery (1.3); the shell (1.4) is fixedly arranged in the alarm mounting hole.

4. A leadless explosion-proof liquid level detector as defined in claim 3, wherein: the inductive switch (1.1) is a magnetic sensitive switch.

5. The leadless explosion-proof liquid level detector of claim 4, wherein: the sensor (2) comprises: the floating ball (2.1), the magnet (2.3) which is matched with the inductive switch (1.1), and the connecting rod (2.2) which is connected with the floating ball (2.1) and the magnet (2.3); the magnet (2.3) is arranged in the fixing seat (2.4), the fixing seat (2.4) is fixedly arranged in the sensor mounting hole, and the floating ball (2.1) is arranged in the container (4).

6. A leadless explosion-proof liquid level detector as defined in claim 3, wherein: the end cover (1.5) and the shell (1.4) are made of HDPE, PTFE, PP and PVDF materials.

7. The leadless explosion-proof liquid level detector of claim 6, wherein: the end cover (1.5) is connected with the shell (1.4) in a sealing mode through threads.

8. The leadless explosion-proof liquid level detector of claim 5, wherein: the floating ball (2.1), the connecting rod (2.2) and the fixed seat (2.4) are made of HDPE, PTFE, PP and PVDF materials.

9. The leadless explosion-proof liquid level detector of claim 1, wherein: the alarm (1) adopts an audible and visual alarm.