Dust charge quantity detection device

Abstract

The utility model discloses a dust charge quantity detection device, a dust charge quantity detection probe comprises a metal insertion rod, a dust inlet and outlet channel is arranged on the metal insertion rod, an annular groove is arranged on the inner wall of the dust inlet and outlet channel, and the dust charge quantity detection probe also comprises an annular electrode arranged in the annular groove; the detection channel is formed in the side wall of the dust hopper, the section of the metal insertion rod is in an oval shape, and the cambered surfaces of the upper end and the lower end of the oval shape are both matched and attached to the arc-shaped grooves; directional positioning can be achieved, and the axis of the dust inlet and outlet channel is vertically arranged. And the section of the detection channel is matched with the elliptical metal insertion rod. When dust detection is not needed, the sealing sheet closes the detection channel to prevent internal dust from overflowing to cause environmental pollution; when the dust charge quantity detection device needs to be used, the dust charge quantity detection probe is connected through a buckle, the dust charge quantity detection probe pushes out the sealing piece, and the connecting ring can block the detection channel to prevent dust from overflowing.

Description

Technical Field

[0001] The utility model relates to the field of detection instruments, in particular to a dust charge detection device. Background Art

[0002] The current dust removal system uses an ash hopper, so there will be suspended dust in the ash hopper. In addition to maintaining the main physical and chemical properties of the original solid coal, the dust will also have many new properties, such as explosiveness, charge, dispersibility, wettability and other new properties. The charge of the dust depends on the size and density of the dust particles, and is also affected by the temperature and humidity of the working environment. When the charged dust is close to polymer materials and equipment, it is absorbed and accumulated to form an object with charge, causing the electrostatic potential to be as high as tens to hundreds of kilovolts. The electrostatic power source formed becomes a potential factor in causing gas dust explosion accidents. In summary, it is necessary to obtain a dust charge detection device, but the existing dust charge detection device is difficult to be fixed and installed according to needs. When the detection probe is not used for detection, the dust is easy to overflow along the insertion channel. Therefore, it is very important to obtain a dust charge detection device that overcomes the above defects. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a dust charge detection device, including a dust charge detection probe, a DSP processing module, a signal conditioning module and an A / D conversion module, the dust charge detection probe is electrically connected to the signal conditioning module, the signal conditioning module is electrically connected to the A / D conversion module, and the A / D conversion module is electrically connected to the DSP processing module, wherein the circuit part of the dust charge detection device also includes a human-machine interface interaction module, a standard signal output module and a display module, and the standard signal output module includes a 4-20mA current output module and a 232 / 485 signal output module. It also includes a power supply module to supply power to the above modules.

[0004] The dust charge detection probe comprises a metal insertion rod, a dust inlet and outlet channel is formed on the metal insertion rod, an annular groove is formed on the inner wall of the dust inlet and outlet channel, and an annular electrode is installed in the annular groove;

[0005] It also includes a detection channel opened on the side wall of the ash hopper, a first limiting protrusion is provided on the inner wall of the ash hopper at the first end of the detection channel, and a sealing member, the sealing member includes a sealing sheet for blocking the detection channel, a first spring sheet and a second spring sheet symmetrically arranged and integrally formed on the sealing sheet, the first spring sheet and the second spring sheet are respectively integrally formed with a second limiting protrusion that matches the first limiting protrusion, an arc groove is provided on the first spring sheet and the second spring sheet, the cross section of the metal insertion rod is an ellipse, and the arc surfaces at the upper and lower ends of the ellipse are both adapted to fit the arc groove; it can achieve directional positioning, so that the axis of the dust inlet and outlet channel is vertically arranged. The cross section of the detection channel matches the elliptical metal insertion rod.

[0006] The outer ash hopper of the detection channel is integrally formed with a third limiting protrusion, and a spring is fixed between the first limiting protrusion and the second limiting protrusion.

[0007] An insulating layer is installed between the annular electrode and the annular groove, a grounding wire is led out from the outer wall of the metal insertion rod, and a signal wire of the annular electrode passes through the metal insertion rod and is led out to the outside.

[0008] The end of the metal insertion rod is integrally formed with a connecting ring, a slot matching the outer wall of the detection channel is provided in the connecting ring, a plurality of snap-in protrusions are provided on the inner wall of the slot, and a snap-in groove matching the snap-in protrusions is provided on the outer wall of the detection channel.

[0009] The sealing sheet is fitted to the inner wall of the ash hopper, and a silicone pad is arranged between them.

[0010] The axis of the annular electrode and the axis of the metal insertion rod have an included angle, so that when the metal insertion rod is vertically inserted into the inclined wall of the ash hopper, the axis of the annular electrode is vertically arranged to facilitate the entry of dust.

[0011] The outside of the metal insert rod may be wrapped with 316 stainless steel.

[0012] Compared with the prior art, the utility model has the following benefits: the utility model has a simple structure, and when dust detection is not needed, the sealing plate closes the detection channel to prevent internal dust from overflowing and causing environmental pollution; when it is needed, the dust charge detection probe of the utility model is connected by a snap, and the dust charge detection probe pushes out the sealing plate, and its connecting ring can block the detection channel to prevent dust from overflowing.

[0013] Based on the principle that flowing charged dust can induce a certain amount of charge on the dust charge detection probe, the weak charge signal detected by the dust charge detection probe is converted into a voltage signal that is easier to process. The voltage signal is amplified and filtered, and then input into the A / D conversion module to quantify the analog signal into digital information. The DSP processing module collects the digital signal output by the A / D conversion module, and further filters the signal inside the DSP processing module to obtain the dust charge signal, which is then sent to the measurement and display module for display. Relevant settings can also be made through the human-machine interface interaction module. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a circuit diagram of the utility model;

[0015] Figure 2 This is a schematic top view of a closed cross section of the sealing sheet of the utility model;

[0016] Figure 3 This is a schematic top view of an open cross section of the sealing sheet of the utility model;

[0017] Figure 4 This is a cross-sectional top view of the utility model with the dust charge detection probe installed;

[0018] Figure 5 It is a three-dimensional diagram of the sealing sheet;

[0019] Figure 6 This is a cross-sectional stereogram of the dust charge detection probe;

[0020] Figure 7 It is a side cross-sectional schematic diagram of the utility model;

[0021] 1 power module; 2 DSP processing module; 3 human-machine interface module; 4 display module; 5 dust charge detection probe; 6 signal conditioning module; 7 A / D conversion module; 8 standard signal output module; 8014-20mA current output module; 802232 / 485 signal output module;

[0022] 501 metal insertion rod; 502 dust inlet and outlet channel; 504 annular electrode; 505 insulating layer;

[0023] 9 ash hopper; 901 detection channel; 902 first limit protrusion; 903 third limit protrusion; 904 spring; 905 connecting ring; 906 clamping protrusion; 907 clamping groove;

[0024] 10 sealing member; 1001 sealing sheet; 1002 first spring sheet; 1003 second spring sheet; 1004 second limiting protrusion; 1005 arc groove. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present invention and to more clearly define the scope of protection claimed by the present invention, the present invention is described in detail below with respect to certain specific embodiments of the present invention. It should be noted that the following are only certain specific implementation methods of the present invention, which are only part of the embodiments of the present invention, and the specific and direct description of the relevant structures is only for the convenience of understanding the present invention, and the specific features do not naturally and directly limit the scope of implementation of the present invention.

[0026] As shown in the attached drawings, the utility model adopts the following technical scheme: a dust charge detection device, including a dust charge detection probe 5, a DSP processing module 2, a signal conditioning module 6 and an A / D conversion module 7, wherein the dust charge detection probe 5 is electrically connected to the signal conditioning module 6, the signal conditioning module 6 is electrically connected to the A / D conversion module 7, and the A / D conversion module 7 is electrically connected to the DSP processing module 2, wherein the circuit part of the dust charge detection device also includes a human-machine interface interaction module 3, a standard signal output module 8 and a display module 4, wherein the standard signal output module 8 includes a 4-20mA current output module 801 and a 232 / 485 signal output module 802. It also includes a power supply module 1 to supply power to the above modules. The circuit part of the utility model adopts the existing circuit to improve the dust charge detection probe 5 and the installation structure:

[0027] The dust charge detection probe 5 includes a metal insertion rod 501, a dust inlet and outlet channel 502 is formed on the metal insertion rod 501, an annular groove is formed on the inner wall of the dust inlet and outlet channel 502, and an annular electrode 504 is installed in the annular groove;

[0028] It also includes a detection channel 901 opened on the side wall of the ash hopper 9, a first limiting protrusion 902 is provided on the inner wall of the ash hopper 9 at the first end of the detection channel 901, and a sealing member 10, the sealing member 10 includes a sealing sheet 1001 for blocking the detection channel 901, a first elastic sheet 1002 and a second elastic sheet 1003 symmetrically arranged and integrally formed on the sealing sheet 1001, and a second limiting protrusion 1004 that cooperates with the first limiting protrusion 902 is integrally formed on the first elastic sheet 1002 and the second elastic sheet 1003, respectively, and an arc groove 1005 is provided on the first elastic sheet 1002 and the second elastic sheet 1003, and the cross section of the metal insertion rod 501 is an ellipse, and the arc surfaces at the upper and lower ends of the ellipse are adapted to fit the arc groove 1005; it can achieve directional positioning, so that the axis of the dust inlet and outlet channel 502 is vertically arranged. The cross section of the detection channel 901 cooperates with the elliptical metal insertion rod 501.

[0029] The outer ash hopper 9 of the detection channel 901 is integrally formed with a third limiting protrusion 903 , and a spring 904 is fixed between the first limiting protrusion 902 and the second limiting protrusion 1004 .

[0030] An insulating layer 505 is installed between the annular electrode 504 and the annular groove. A ground wire is led out from the outer wall of the metal insertion rod 501 . A signal wire of the annular electrode 504 passes through the metal insertion rod 501 and is led out to the outside.

[0031] The end of the metal insertion rod 501 is integrally formed with a connecting ring 905, a slot is provided in the connecting ring 905 to cooperate with the outer wall of the detection channel 901, a plurality of snap-in protrusions 906 are provided on the inner wall of the slot, and a snap-in groove 907 to cooperate with the snap-in protrusion 906 is provided on the outer wall of the detection channel 901.

[0032] In other embodiments, the connecting ring can be rotatably connected to the outer end of the metal insert rod, that is, the outer end of the metal insert rod is fixed with a rotating shaft, a rotating hole is opened in the center of the connecting ring, a bearing can be provided between the rotating shaft and the rotating hole, and a thread is opened on the inner wall of the connecting ring for threaded connection with the outer wall of the detection channel, and a corresponding thread is opened on the outer wall of the detection channel to increase the firmness of the assembly.

[0033] The sealing sheet 1001 is fitted to the inner wall of the ash hopper 9, and a silicone pad is provided therebetween, for example, the silicone pad is fixedly glued to the sealing sheet.

[0034] The axis of the annular electrode 504 and the axis of the metal insertion rod 501 have an included angle, so that when the metal insertion rod 501 is vertically inserted into the inclined wall of the ash hopper 9, the axis of the annular electrode 504 is vertically arranged to facilitate the entry of dust.

[0035] Compared with the prior art, the utility model has the following benefits: the utility model has a simple structure. When dust detection is not needed, the sealing sheet 1001 closes the detection channel 901 to prevent internal dust from overflowing and causing environmental pollution. When it is needed, the dust charge detection probe 5 of the utility model is connected by a snap, and the dust charge detection probe 5 pushes out the sealing sheet 1001, and its connecting ring 905 can block the detection channel 901 to prevent dust from overflowing.

[0036] Using the principle that flowing charged dust can induce a certain amount of charge on the dust charge detection probe 5, the weak charge signal detected by the dust charge detection probe 5 is converted into a voltage signal that is easier to process, and the voltage signal is amplified and filtered before being input into the A / D conversion module 7, and the analog signal is quantified into digital information. The DSP processing module 2 collects the digital signal output by the A / D conversion module 7, and after further filtering the signal inside the DSP processing module 2, the dust charge signal is obtained, and the obtained charge signal is sent to the measurement power display module 4 for display. Relevant settings can also be made through the human-machine interface interaction module 3.

[0037] The above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A dust charge detection device, comprising a dust charge detection probe (5), a DSP processing module (2), a signal conditioning module (6) and an A / D conversion module (7), wherein the dust charge detection probe (5) is electrically connected to the signal conditioning module (6), the signal conditioning module (6) is electrically connected to the A / D conversion module (7), and the A / D conversion module (7) is electrically connected to the DSP processing module (2), characterized in that: The dust charge detection probe (5) comprises a metal insertion rod (501), a dust inlet and outlet channel (502) is provided on the metal insertion rod (501), an annular groove is provided on the inner wall of the dust inlet and outlet channel (502), and also comprises an annular electrode (504) installed in the annular groove; It also includes a detection channel (901) provided on the side wall of the ash hopper (9), a first limiting protrusion (902) is provided on the inner wall of the ash hopper (9) at the first end of the detection channel (901), and a sealing member (10), the sealing member (10) includes a sealing sheet (1001) for blocking the detection channel (901), a first elastic sheet (1002) and a second elastic sheet (1003) symmetrically arranged and integrally formed on the sealing sheet (1001), the first elastic sheet (1002) and the second elastic sheet (1003) respectively being integrally formed with a second limiting protrusion (1004) cooperating with the first limiting protrusion (902), the first elastic sheet (1002) and the second elastic sheet (1003) being both provided with an arc groove (1005), the cross section of the metal insertion rod (501) being an ellipse, and the arc surfaces at the upper and lower ends of the ellipse both being adapted to fit the arc groove (1005); The outer ash hopper (9) of the detection channel (901) is integrally formed with a third limiting protrusion (903), and a spring (904) is fixed between the first limiting protrusion (902) and the second limiting protrusion (1004).

2. The dust charge detection device according to claim 1, characterized in that: An insulating layer (505) is installed between the annular electrode (504) and the annular groove, a grounding wire is led out from the outer wall of the metal insertion rod (501), and a signal wire of the annular electrode (504) passes through the metal insertion rod (501) and is led out to the outside.

3. The dust charge detection device according to claim 1, characterized in that: It also includes a power supply module (1) for supplying power to the above modules.

4. The dust charge detection device according to claim 1, characterized in that: The end of the metal insertion rod (501) is integrally formed with a connecting ring (905), a slot matching the outer wall of the detection channel (901) is provided in the connecting ring (905), a plurality of snap-fitting protrusions (906) are provided on the inner wall of the slot, and a snap-fitting groove (907) matching the snap-fitting protrusions (906) is provided on the outer wall of the detection channel (901).

5. The dust charge detection device according to claim 1, characterized in that: The sealing sheet (1001) is in contact with the inner wall of the ash hopper (9), and a silicone pad is provided between them.

6. The dust charge detection device according to claim 1, characterized in that: The axis of the annular electrode (504) and the axis of the metal insertion rod (501) form an angle, so that when the metal insertion rod (501) is vertically inserted into the inclined wall of the ash hopper (9), the axis of the annular electrode (504) is vertically arranged.

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