Sensor with purging function

Abstract

The utility model discloses a sensor with a purging function, and particularly relates to the technical field of sensors, the sensor comprises an instrument transmitter, a sensor body and an induction electrode installed on the sensor body, the instrument transmitter is arranged at the top of the sensor body, the instrument transmitter is in threaded connection with the sensor body, and the sensor body is in threaded connection with the instrument transmitter. A functional assembly for blowing dirt is arranged outside the sensor body; the functional assembly comprises a sensor metal shell installed outside the sensor body. According to the utility model, gas is guided to the gas distribution pipe through the compressed gas inlet pipe, and then is guided through the sealing area, the distribution area, the mixing area and the flow guide area, so that the gas can purge the outside of the sensing electrode, and pollutants are prevented from being attached to the junction of the sensing electrode and the sensor metal shell; the sensor body is effectively prevented from being shielded and corroded, so that the sensor can be normally used in a high-pollution environment, and the use performance of the sensor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, and more specifically to a sensor with a purging function. Background Art

[0002] An electrostatic sensor is a device used to detect and monitor static charges and is widely used in industries such as electronics and thin films. Electrostatic sensors mainly work based on the principle of electrostatic induction or through charge transfer. When an electrostatic sensor works through electrostatic induction, its sensing principle can be explained by an equivalent capacitance sensor. This is because a charged object can be modeled as one plate of a capacitor, and the electrode itself can be modeled as the other plate. The movement of this charged object relative to the electrode changes the value of the capacitance between the two plates. As a result, the amount of charge on the object may change over time.

[0003] For the detection of dust concentration in a highly polluted and toxic environment, existing electrostatic sensors mainly use an insertion type for inductive measurement. However, due to reasons such as high concentration, high humidity, and high corrosion inside the dust collector, when the instrument is inserted into the flue, it will cause various effects such as corrosion and shielding, resulting in the need for frequent maintenance of the equipment or even the inability to work properly, thus affecting the performance of the sensor. Summary of the Utility Model

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a sensor with a purging function. The gas is guided to the gas distribution pipe through the compressed gas inlet pipe, and then the gas is diverted through the sealing area, distribution area, mixing area, and diversion area, so that the gas can purge the outside of the induction electrode, preventing pollutants from adhering to the junction of the induction electrode and the metal shell of the sensor, effectively preventing the sensor body from being shielded and corroded, and enabling the utility model to be used normally in a highly polluted environment to solve the problems presented in the above background art.

[0005] To achieve the above object, the utility model provides the following technical solution: A sensor with a purging function, including an instrument transmitter, a sensor body, and an induction electrode installed on the sensor body. The instrument transmitter is arranged on the top of the sensor body and is threadedly connected to the sensor body. A functional component for purging dirt is arranged outside the sensor body;

[0006] The functional component includes a sensor metal shell installed outside the sensor body. The top of the sensor metal shell is fixedly communicated with a compressed gas inlet pipe, and a drainage pipe is installed at one end of the sensor metal shell away from the instrument transmitter.

[0007] In a preferred embodiment, a guiding member for guiding gas is arranged inside the sensor metal shell;

[0008] The guiding member includes a gas distribution pipe sleeved outside the sensor body, and the gas distribution pipe is successively composed of a sealing area, a distribution area, a mixing area and a diversion area from top to bottom;

[0009] An air outlet for blowing air is provided between the drainage pipe and the mixing area. The gas is guided to the gas distribution pipe through the compressed gas inlet pipe, and then the gas is drained through the sealing area, the distribution area, the mixing area and the diversion area, so that the gas can purge the outside of the induction electrode and prevent pollutants from attaching to the junction of the induction electrode and the sensor metal housing to cause shielding or corrosion.

[0010] In a preferred embodiment, the position of the compressed gas inlet pipe corresponds to the sealing area left and right for guiding the flow of the gas.

[0011] In a preferred embodiment, a plurality of drainage grooves are formed on one side of the gas distribution pipe corresponding to the distribution area, and the plurality of drainage grooves are evenly spaced for dispersing the gas to make the gas evenly distributed.

[0012] In a preferred embodiment, a sealing O-ring is sleeved outside one end of the gas distribution pipe close to the instrument transmitter, and the sealing O-ring is arranged inside the sensor metal housing to prevent the gas from flowing into the instrument transmitter.

[0013] In a preferred embodiment, the length of the gas distribution pipe is greater than the total length of the sensor metal housing and the drainage pipe, and one end of the gas distribution pipe far from the instrument transmitter penetrates outside the drainage pipe.

[0014] The technical effects and advantages of the present utility model:

[0015] The gas is guided to the gas distribution pipe through the compressed gas inlet pipe, and then the gas is drained through the sealing area, the distribution area, the mixing area and the diversion area, so that the gas can purge the outside of the induction electrode and prevent pollutants from attaching to the junction of the induction electrode and the sensor metal housing, effectively preventing the sensor body from being shielded and corroded, enabling the present utility model to be normally used in a high-pollution environment and improving the use performance of the present utility model. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 It is a front view of the sensor body of the present utility model;

[0018] Figure 3 It is a front view of the gas distribution pipe of the present utility model;

[0019] Figure 4 It is a front view of the drainage groove of the present utility model;

[0020] Figure 5 This is the bottom view of the sensor metal housing of the present utility model.

[0021] The reference numerals are: 1, instrument transmitter; 2, sensor body; 3, induction electrode; 4, sensor metal housing; 5, compressed gas inlet pipe; 6, drainage pipe; 7, gas distribution pipe; 71, sealing area; 72, distribution area; 73, mixing area; 74, diversion area; 75, air outlet; 8, drainage groove; 9, sealing O-ring. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Refer to the attached drawings of the specification Figures 1-5 The present utility model provides a sensor with a purging function, including an instrument transmitter 1, a sensor body 2, and an induction electrode 3 installed on the sensor body 2. The instrument transmitter 1 is arranged on the top of the sensor body 2, and the instrument transmitter 1 is threadedly connected to the sensor body 2. A functional component for purging dirt is arranged outside the sensor body 2;

[0024] As Figure 1 , 2 and shown in 5, the functional component includes a sensor metal housing 4 installed outside the sensor body 2. A compressed gas inlet pipe 5 is fixedly communicated with the top of the sensor metal housing 4, and a drainage pipe 6 is installed at one end of the sensor metal housing 4 away from the instrument transmitter 1.

[0025] The instrument transmitter 1 and the sensor body 2 are connected into an integral detection device by bolts, and then fixed on the equipment pipeline at the site through threads or flanges. Then, the on-site compressed gas can be connected through the compressed gas inlet pipe 5;

[0026] Compressed gas enters the sealed area 71 on the gas distribution pipe 7 through the compressed gas inlet pipe 5. The sealed O-ring 9 can effectively prevent the compressed gas from flowing back into the instrument transmitter 1, allowing the gas to be transported to the mixing area 73 at multiple angles only through the multiple drainage grooves 8 on the distribution. The mixing area 73 buffers the compressed gas to ensure that the gas volume at each angle is constant when passing through the diversion area 74, preventing pollution caused by uneven gas distribution resulting in no gas ejection in some areas. The gas is discharged through the air outlet 75. Due to the influence of the diversion area 74, a conical air curtain is formed, which can prevent pollutants from adhering to the junction of the induction electrode 3 and the sensor metal housing 4, and also allow the sensor body 2 to pass through the heavily polluted area, effectively preventing the sensor body 2 from being shielded and corroded, thus solving the problem of inability to operate for a long time in a highly polluted environment.

[0027] To facilitate guiding the gas to the induction electrode 3, as Figure 5 shown, a guiding member for guiding the gas is provided inside the sensor metal housing 4; the guiding member includes a gas distribution pipe 7 sleeved outside the sensor body 2, and the gas distribution pipe 7 is successively composed of a sealed area 71, a distribution area 72, a mixing area 73, and a diversion area 74 from top to bottom. A plurality of drainage grooves 8 are opened on one side of the gas distribution pipe 7 corresponding to the distribution area 72, and the plurality of drainage grooves 8 are evenly spaced. Through the plurality of drainage grooves 8, the gas can be dispersed evenly and the flow direction of the gas can be guided. The compressed gas inlet pipe 5 corresponds to the sealed area 71 in terms of position. The corresponding position of the compressed gas inlet pipe 5 and the sealed area 71 allows the gas to start flowing from the sealed area 71, and then be drained successively through the distribution area 72, the mixing area 73, and the diversion area 74; an air outlet 75 for blowing air is provided between the drainage pipe 6 and the mixing area 73. Through the cooperation of the sealed area 71, the distribution area 72, the mixing area 73, and the diversion area 74 on the gas distribution pipe 7, the flow of the gas can be guided, so that the gas can purge and clean the induction electrode 3, thereby avoiding dirt adhesion and affecting the use performance of the induction motor 3.

[0028] To ensure the flow direction of the gas and prevent the gas from flowing into the instrument transmitter 1, as Figure 3 shown, a sealed O-ring 9 is sleeved outside one end of the gas distribution pipe 7 close to the instrument transmitter 1. The sealed O-ring 9 is arranged inside the sensor metal housing 4. By blocking the top of the gas distribution pipe 7 with the sealed O-ring 9, the gas can be prevented from flowing into the instrument transmitter 1, preventing the gas from entering the instrument transmitter 1 and affecting the use stability of the instrument transmitter 1.

[0029] To facilitate guiding the gas to purge and clean the induction electrode 3, as Figure 3 and 4As shown, the length of the gas distribution pipe 7 is greater than the total length of the sensor metal housing 4 and the drainage pipe 6, and the end of the gas distribution pipe 7 far from the instrument transmitter 1 penetrates outside the drainage pipe 6. By setting the length of the gas distribution pipe 7 to be greater than the total length of the sensor metal housing 4 and the drainage pipe 6, the gas distribution pipe 7 can guide the gas to the induction electrode 3 for purging and cleaning, thereby improving the practicability of the present utility model.

[0030] Finally, the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A sensor with a purge function, characterized in that: The invention comprises an instrument transmitter (1), a sensor body (2), and a sensing electrode (3) mounted on the sensor body (2), wherein the instrument transmitter (1) is arranged on the top of the sensor body (2), and the instrument transmitter (1) is threadedly connected to the sensor body (2), and a functional component for blowing away dirt is arranged outside the sensor body (2); The functional component comprises a sensor metal shell (4) mounted outside the sensor body (2), the top of the sensor metal shell (4) being fixedly connected to a compressed gas inlet pipe (5), and an end of the sensor metal shell (4) away from the instrument transmitter (1) being mounted with a drainage pipe (6).

2. A sensor with a purge function according to claim 1, characterized in that: A guide member for guiding gas is provided inside the metal housing (4) of the sensor; The guide member comprises a gas distribution pipe (7) sleeved on the outside of the sensor body (2), and the gas distribution pipe (7) is composed of a sealing area (71), a distribution area (72), a mixing area (73) and a guide area (74) from top to bottom; An air outlet (75) for supplying air is provided between the drainage pipe (6) and the mixing zone (73).

3. A sensor with a purge function according to claim 2, characterized in that: The compressed gas inlet pipe (5) and the sealing area (71) are located in left-right correspondence with each other.

4. A sensor with a purge function according to claim 2, characterized in that: A plurality of drainage grooves (8) are provided on one side of the gas distribution pipe (7) corresponding to the distribution area (72), and the plurality of drainage grooves (8) are evenly spaced and distributed.

5. The sensor with purge function according to claim 2, characterized in that: A sealing O-ring (9) is sleeved on the outside of one end of the gas distribution pipe (7) close to the instrument transmitter (1), and the sealing O-ring (9) is arranged inside the metal housing (4) of the sensor.

6. The sensor with purge function according to claim 2, characterized in that: The length of the gas distribution pipe (7) is greater than the total length of the sensor metal housing (4) and the drainage pipe (6), and one end of the gas distribution pipe (7) away from the instrument transmitter (1) passes through the outside of the drainage pipe (6).

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