Protective structure of electrostatic sensor

Abstract

The embodiment of the utility model discloses a protection structure of an electrostatic sensor in the technical field of sensors. The protective sleeve comprises a limiting gasket, a sleeve extension pipe is installed at the lower end of the limiting gasket, a metal probe is installed at the lower end of the middle of the electrostatic sensor, a corrosion-resistant sleeve is installed outside the metal probe, and a probe protective layer is installed outside the corrosion-resistant sleeve. The probe protection layer is located in a middle hole cavity of the sleeve extension pipe, the lower end of the field equipment pipeline comprises a high-pollution boundary layer, and the sleeve extension pipe penetrates through the high-pollution boundary layer. The sleeve extension pipe penetrates through the high-pollution boundary layer, the electrostatic sensor is prevented from being directly exposed in a high-pollution area, the sleeve extension pipe can meet the requirement for effective detection of the electrostatic sensor in a high-pollution environment, the maintenance amount of equipment in a high-risk environment is reduced, the maintenance cost of the equipment is reduced, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of sensors, and in particular to a protective structure of an electrostatic sensor. Background Art

[0002] The main installation locations of electrostatic sensors are pipeline entrances and exits in environments with high concentration, high corrosion, high humidity, salt formation, conductive dust, etc. Electrostatic sensors are often installed in the power industry, chemical industry, steel industry, cement industry, coal industry, petrochemical industry, non-ferrous metal industry, waste incineration industry and other industries.

[0003] For the detection of dust concentration in the existing highly polluted and toxic environment, the existing electrostatic sensors mainly use insertion type for induction measurement. However, due to the high concentration, high humidity and high corrosion inside the dust collector, the instrument will cause corrosion, shielding and other effects after being inserted into the flue, causing the equipment to require frequent maintenance or even unable to work normally.

[0004] For the detection of this type of dust concentration, the following points should be noted:

[0005] 1. There is a high-concentration, high-humidity medium in the flue, which will cause the medium to adhere to the surface of the sensor inserted into the pipe. Large-area adhesion, such as overlapping with the flue wall, will form a shielding layer on the sensor surface. For sensors based on the principle of electrostatic induction, the shielding layer will directly shield the measured signal, causing the instrument to be unable to sense the signal.

[0006] 2. There is highly corrosive dust in the flue, especially at the turbulent area where the sensor is inserted. Due to temperature and other factors, a large amount of acid will be produced here, which will corrode the surface of the sensor inserted in the pipe and reduce the service life of the product. In severe cases, the sensor inserted in the pipe will be corroded and broken, causing the risk of damage to the equipment inside the pipe.

[0007] Therefore, in view of the above situation, it is necessary to focus on protecting the sensor insertion position to ensure that the equipment can be used normally, reduce the corrosion problem of the equipment, and avoid accidents. The main method used by existing industry products is to insert the internal sensor directly with a bare stainless steel rod or cover the surface with corrosion-resistant materials. Bare rods or sensors covered with corrosion-resistant materials cannot operate for a long time. The sensor surface will quickly adhere to salt due to high internal concentrations and high humidity environments, causing part of the sensing signal to be shielded. The equipment cannot measure valid data and requires frequent maintenance to ensure measurement. The measured environment is mostly a highly polluted and toxic positive pressure environment. The equipment does not have the conditions for dismantling and maintenance at any time. A lot of protection or shutdown is required before it can be disassembled for maintenance. If the existing equipment is not maintained, the measured data will not be authentic. Utility Model Content

[0008] To this end, an embodiment of the utility model provides a protective structure of an electrostatic sensor to solve the problem that the surface of the electrostatic sensor in the prior art is prone to corrosion.

[0009] In order to achieve the above purpose, the embodiment of the utility model provides the following technical solutions:

[0010] A protective structure for an electrostatic sensor comprises a protective sleeve for protecting the electrostatic sensor.

[0011] The outside of the protective sleeve is provided with a field equipment pipeline for supporting and limiting the protective sleeve.

[0012] The protective sleeve comprises a limiting gasket, and a sleeve extension tube is installed at the lower end of the limiting gasket.

[0013] A metal probe is installed at the lower middle end of the electrostatic sensor, a corrosion-resistant sleeve is installed outside the metal probe, a probe protective layer is installed outside the corrosion-resistant sleeve, and the probe protective layer is located in the middle cavity of the sleeve extension tube.

[0014] Furthermore, an instrument transmitter is installed at the upper end of the electrostatic sensor, a first flange is installed at the middle of the electrostatic sensor, and a plurality of first limiting holes are opened at the edge of the first flange.

[0015] Furthermore, a sealing gasket is sleeved on the middle part of the electrostatic sensor, and the sealing gasket is located at the lower end of the first flange.

[0016] Furthermore, a second flange is installed at the upper end of the field equipment pipeline, and a plurality of second limiting holes are opened on the edge of the second flange.

[0017] Furthermore, a plurality of bolts for cooperating with the first limiting holes and the second limiting holes to fix the sensor are installed at the upper end of the first flange, and nuts are installed at the lower ends of the bolts, and the nuts are located at the lower end of the second flange.

[0018] Furthermore, the lower end of the field equipment pipeline includes a high-contamination boundary layer, and the sleeve extension pipe penetrates the high-contamination boundary layer.

[0019] The utility model embodiment has the following advantages:

[0020] The sleeve extension tube passes through the high-pollution boundary layer, preventing the electrostatic sensor from being directly exposed to the high-pollution area, so that the sleeve extension tube can meet the effective detection of the electrostatic sensor in a high-pollution environment, reduce the maintenance of the equipment in a high-risk environment, reduce the maintenance cost of the equipment and increase the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0022] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the protective sleeve of the utility model;

[0025] Figure 3 For this utility model Figure 1 A magnified image of point A;

[0026] Figure 4 For this utility model Figure 1 Enlarged view of point B.

[0027] In the figure: 10-instrument transmitter, 20-sealing gasket, 30-high-contamination boundary layer, 100-sensor, 110-first flange, 111-first limiting hole, 120-bolt, 121-nut, 130-probe protective layer, 140-corrosion-resistant sleeve, 150-metal probe, 200-field equipment pipeline, 210-second flange, 211-second limiting hole, 300-protective sleeve, 310-limiting gasket, 320-sleeve extension tube. DETAILED DESCRIPTION

[0028] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0030] See also Figure 1-Figure 4 The utility model provides a protective structure of an electrostatic sensor, including a protective sleeve 300 for protecting the electrostatic sensor 100, and the protective sleeve 300 includes a limiting gasket 310, and a sleeve extension tube 320 is fixedly installed at the lower end of the limiting gasket 310.

[0031] The instrument transmitter 10 is installed at the upper end of the electrostatic sensor 100, and the first flange 110 is fixedly installed in the middle of the electrostatic sensor 100. The edge of the first flange 110 is provided with a plurality of first limiting holes 111. The middle of the electrostatic sensor 100 is sleeved with a sealing gasket 20, and the sealing gasket 20 is located at the lower end of the first flange 110 and the upper end of the limiting gasket 310.

[0032] The protective sleeve 300 is provided with a field equipment pipeline 200 for supporting and limiting the protective sleeve 300 on the outside. The lower end of the field equipment pipeline 200 includes a high-contamination boundary layer 30, and the sleeve extension tube 320 penetrates the high-contamination boundary layer 30. The upper end of the field equipment pipeline 200 is fixedly mounted with a second flange 210, and the limiting gasket 310 is located at the upper end of the second flange 210. The edge of the second flange 210 is provided with a plurality of second limiting holes 211, and the second limiting holes 211 are aligned with the first limiting holes 111. The lower end of the second flange 210 is provided with a connecting pipe for connecting with the field equipment pipeline 200, and the sleeve extension tube 320 is inserted in the connecting pipe and penetrates the high-contamination boundary layer 30.

[0033] A plurality of bolts 120 for fixing the electrostatic sensor 100 in cooperation with the first limiting holes 111 and the second limiting holes 211 are installed at the upper end of the first flange 110, and nuts 121 are installed at the lower end of the bolts 120, and the nuts 121 are located at the lower end of the second flange 210. The sealing gasket 20 passes through the first limiting holes 111 and the second limiting holes 211, and the nuts 121 are screwed to the bottom of the bolts 120, so that the first flange 110 and the second flange 210 are close to each other, and the sealing gasket 20 and the limiting gasket 310 are pressed synchronously, so as to prevent the high pollution environment in the boundary turbulent area from directly corroding and interfering with the sensor.

[0034] A metal probe 150 is installed at the lower middle end of the electrostatic sensor 100 . The metal probe 150 is sheathed with a corrosion-resistant sleeve 140 . The corrosion-resistant sleeve 140 is sheathed with a probe protective layer 130 . The probe protective layer 130 is located in the middle cavity of the sleeve extension tube 320 .

[0035] The instrument transmitter 10 and the electrostatic sensor 100 are connected by threads to form an integral detection device, and then fixed to the second flange 210 at the upper end of the field equipment pipeline 200 by a first flange 110, bolts 120, nuts 121, sealing gasket 20 and protective sleeve 300.

[0036] The sleeve extension tube 320 is located in the middle layer between the electrostatic sensor 100 and the upper connecting tube of the field equipment pipeline 200. Its main function is to prevent the metal probe 150 from bridging with the field equipment pipeline 200, resulting in signal shielding and inability to measure, and to assist the probe to cross the high-pollution boundary layer 30.

[0037] The specific avoidance method is that the protective sleeve 300, the probe protective layer 130, the corrosion-resistant sleeve 140, and the sealing gasket 20 form an inverted cup-shaped structure, and the limiting gasket 310 is tightly attached to the upper end of the second flange 210, which will make it difficult for pollutants to contaminate the bottom position of the cup-shaped structure, and the electrostatic sensor 100 cannot be electrostatically shielded, thereby solving the problem of being unable to detect for a long time in a highly polluted environment.

[0038] according to Figure 1 The sleeve extension tube 320 is shown to pass through the high-pollution boundary layer 30, preventing the electrostatic sensor 100 from being directly exposed to the high-pollution area, and the opening portion of the cup-shaped structure passes through the high-pollution area, reducing the probability of internal contamination.

[0039] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A protective structure for an electrostatic sensor, comprising a protective sleeve (300) for protecting the electrostatic sensor (100), characterized in that: The exterior of the protective sleeve (300) is provided with a field equipment pipeline (200) for supporting and limiting the position of the protective sleeve (300); The protective sleeve (300) comprises a limiting gasket (310), and a sleeve extension tube (320) is installed at the lower end of the limiting gasket (310); A metal probe (150) is installed at the lower middle end of the sensor (100), a corrosion-resistant sleeve (140) is installed outside the metal probe (150), a probe protective layer (130) is installed outside the corrosion-resistant sleeve (140), and the probe protective layer (130) is located in the middle cavity of the sleeve extension tube (320).

2. The protective structure of an electrostatic sensor according to claim 1, characterized in that: An instrument transmitter (10) is installed at the upper end of the sensor (100), a first flange (110) is installed in the middle of the sensor (100), and a plurality of first limiting holes (111) are provided on the edge of the first flange (110).

3. The protective structure of an electrostatic sensor according to claim 2, characterized in that: A sealing gasket (20) is sleeved on the middle part of the sensor (100), and the sealing gasket (20) is located at the lower end of the first flange (110).

4. The protective structure of an electrostatic sensor according to claim 2, characterized in that: A second flange (210) is installed at the upper end of the field equipment pipeline (200), and a plurality of second limiting holes (211) are provided on the edge of the second flange (210).

5. The protective structure of an electrostatic sensor according to claim 4, characterized in that: A plurality of bolts (120) for cooperating with the first limiting holes (111) and the second limiting holes (211) to fix the sensor (100) are installed at the upper end of the first flange (110), and nuts (121) are installed at the lower ends of the bolts (120), and the nuts (121) are located at the lower end of the second flange (210).

6. The protective structure of an electrostatic sensor according to claim 1, characterized in that: The lower end of the field equipment pipeline (200) includes a high-pollution boundary layer (30), and the sleeve extension tube (320) penetrates the high-pollution boundary layer (30).

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