Wind powder sensor

Abstract

A wind powder sensor belongs to the technical field of wind powder detection. According to the utility model, the problems of many components, many matching surfaces and large construction workload of the existing annular wind powder sensor are solved. Comprising a sensor body, a shield and a mounting flange, the sensor body and the mounting flange are fixedly connected through a plurality of screws, the shield and the mounting flange are fixedly connected through a plurality of screws, and the sensor body comprises a waveguide rod, a waveguide rod mounting base, three strip-shaped electrodes, three electrode mounting plates, three electrode pressing plates and three 7-shaped induction pieces. And one end surfaces, far away from the shield, of each strip-shaped electrode, each electrode mounting plate and the waveguide rod mounting plate are cambered surfaces. One end face of each strip-shaped electrode, one end face of each electrode mounting plate and one end face of each waveguide rod mounting plate, which are far away from the shield, are cambered surfaces, the matching surface is only the cambered surface, and each strip-shaped electrode and the corresponding electrode mounting plate are fixed in an up-and-down pressing manner, so that the structure is simple, the processing is easy, the processing and manufacturing cost is low, and the sealing is reliable.

Description

Technical Field

[0001] This utility model relates to a wind-dust sensor, belonging to the field of wind-dust detection technology. Background Technology

[0002] The air-coal sensor is an intuitive and effective online monitoring device for parameters such as air velocity and coal powder concentration in pulverized coal boilers of power plants. It provides important scientific basis for operators to make reasonable adjustments to combustion conditions. By monitoring and recording flow parameters such as coal powder concentration, air temperature, and air velocity in the air ducts online, it can effectively improve the stability, safety, and economy of boiler operation.

[0003] Existing coal-air pulverizer sensors all employ a ring-shaped sealed cavity design, with the inner diameter of the ring matching the inner diameter of the on-site coal pulverizer pipe, and four sets of electrodes evenly distributed. During actual assembly, the numerous components and mating surfaces make sealing the ring-shaped cavity difficult, posing a risk of water vapor ingress and coal pulverizer leakage from the furnace. Furthermore, on-site installation requires cutting a section of the coal pulverizer pipe along its circumference and welding a flange, resulting in a large workload and high difficulty. Therefore, considering both performance and cost, a new type of coal-air pulverizer sensor is urgently needed to effectively solve the aforementioned problems of traditional ring-shaped coal-air pulverizer sensors. Summary of the Invention

[0004] The present invention aims to solve the above-mentioned technical problems and thereby provide a wind-powder sensor.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A wind-powder sensor includes a sensor body, a protective cover, and a mounting flange, wherein the sensor body and the mounting flange, as well as the protective cover and the mounting flange, are fixedly connected by a number of screws.

[0007] The sensor body includes a waveguide rod, a waveguide rod mounting base, three strip electrodes, three electrode mounting plates, three electrode pressure plates, and three 7-shaped sensing elements. The three electrode mounting plates and the three strip electrodes are arranged alternately from top to bottom, and are fixed together by several first screws. Each strip electrode is fixed to the electrode mounting plate above it. The waveguide rod mounting base and the lowest strip electrode are arranged parallel to each other, and are fixed to the lowest electrode mounting plate by at least two second screws. The waveguide rod is horizontally arranged and fixedly inserted into the waveguide rod mounting base, with both ends extending beyond the mounting base. Each strip electrode, each electrode mounting plate, and the end face of the waveguide rod mounting plate away from the protective cover are curved surfaces.

[0008] Each strip electrode has a slot at its bottom, and the electrode pressure plate is correspondingly installed in the slot. One end of each of the three 7-shaped sensing plates is clamped between the three strip electrodes and the three electrode pressure plates, while the other end passes horizontally through and extends out of the electrode mounting plate.

[0009] Furthermore, a limiting groove and a through hole are connected in the horizontal direction on the waveguide rod mounting base. A rubber pad is installed in the limiting groove, and the waveguide rod is sequentially inserted into the rubber pad and the through hole.

[0010] Furthermore, a waveguide rod pressure plate is attached to one end of the rubber pad away from the through hole, and the waveguide rod pressure plate is fixed to the waveguide rod mounting base by a fifth screw.

[0011] Furthermore, an O-ring seal is used to seal the connection between the mounting flange and the protective cover.

[0012] Furthermore, the mounting flange and the sensor body are sealed with a gasket.

[0013] Furthermore, the protective cover is fixed to the mounting flange by a number of circumferentially distributed third screws.

[0014] Furthermore, the upper part of the mounting flange is fixed to the uppermost electrode mounting plate by at least two fourth screws, and the lower part of the mounting flange is fixed to the waveguide rod mounting base by at least two fourth screws.

[0015] Furthermore, each strip electrode is fixed to its corresponding electrode mounting plate above it by a sixth screw.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] Each strip electrode, each electrode mounting plate, and the waveguide rod mounting plate has an arc-shaped end face away from the protective cover, with only this one mating surface. Furthermore, each strip electrode is fixed to the electrode mounting plate by pressing it against the top and bottom. Compared to existing technologies, this design features simpler component structure, easier processing, lower manufacturing costs, and reliable sealing. During on-site construction, only a corresponding hole needs to be drilled in the side wall of the pulverized coal pipeline; the entire pipeline section does not need to be cut, simplifying the operation. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the main cross-section of the present invention;

[0020] Figure 3 This is an exploded view of the present invention;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the sensor body;

[0022] Figure 5 This is a schematic diagram of the explosion of the sensor body.

[0023] In the picture:

[0024] 1. Sensor body; 11. Waveguide rod; 12. Waveguide rod mounting base; 13. Strip electrode; 14. Electrode mounting plate; 15. Electrode pressure plate; 16. 7-shaped sensing element; 17. First screw; 18. Second screw; 19. Rubber pad; 20. Waveguide rod pressure plate; 21. Fifth screw; 22. Sixth screw; 2. Protective cover; 3. Mounting flange; 4. Third screw; 5. Fourth screw; 6. O-ring; 7. Sealing gasket. Detailed Implementation

[0025] Specific implementation method one: Combining Figures 1-5 This description explains the technical solutions in the embodiments of the present utility model in a clear and complete manner. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that the descriptions of "left," "right," "left side," "right side," "upper part," "lower part," "top," and "bottom" in this utility model are defined based on the orientation or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and are not intended to indicate or imply that the described structure must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0027] In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] A wind-powder sensor includes a sensor body 1, a protective cover 2, and a mounting flange 3, wherein the sensor body 1 and the mounting flange 3, as well as the protective cover 2 and the mounting flange 3, are fixed together by a plurality of screws.

[0029] The sensor body 1 includes a waveguide rod 11, a waveguide rod mounting base 12, several strip electrodes 13, several electrode mounting plates 14, several electrode pressure plates 15, and several 7-shaped sensing sheets 16. The electrode mounting plates 14 and strip electrodes 13 are arranged alternately from top to bottom, and the electrode mounting plates 14 are fixed together by several first screws 17. Each strip electrode 13 is fixed to the electrode mounting plate 14 above it. The waveguide rod mounting base 12 and the lowest strip electrode 13 are arranged parallel to each other, and the waveguide rod mounting base 12 and the lowest electrode mounting plate 14 are fixed together by at least two second screws 18. The waveguide rod 11 is horizontally arranged and fixedly inserted into the waveguide rod mounting base 12, with both ends of the waveguide rod 11 extending out of the waveguide rod mounting base 12. The end face of each strip electrode 13, each electrode mounting plate 14, and the waveguide rod 11 mounting plate away from the protective cover 2 is an arc surface.

[0030] Each strip electrode 13 has a slot at its bottom, and the electrode pressure plate 15 is correspondingly installed in the slot. One end of several 7-shaped sensing plates 16 is correspondingly clamped between several strip electrodes 13 and several electrode pressure plates 15, and the other end passes horizontally through and extends out of the electrode mounting plate 14.

[0031] The number of strip electrodes 13, electrode mounting plates 14, electrode pressure plates 15, and 7-shaped sensing sheets 16 are preferably three.

[0032] Each strip electrode 13, each electrode mounting plate 14, and the end face of the waveguide rod 11 mounting plate away from the protective cover 2 are arc-shaped. Each strip electrode 13 and the electrode mounting plate 14 are fixed by pressing from top to bottom. Compared with the prior art, the component structure is simple, easy to process, and has low processing and manufacturing costs, and the sealing is reliable. During on-site construction, only a corresponding hole needs to be opened on the side wall of the pulverized coal pipeline, without having to cut off the entire pipeline, making the operation simpler.

[0033] The sensor body 1 and the protective cover 2 are fixedly connected by the mounting flange 3. Several screws used to fix the protective cover 2 and the mounting flange 3 are designated as third screws 4; several screws used to fix the sensor body 1 and the mounting flange 3 are designated as fourth screws 5. The third screws 4 and fourth screws 5 facilitate the installation and removal of the protective cover 2 from the mounting flange 3, and between the mounting flange 3 and the sensor body 1.

[0034] Three strip electrodes 13 are sandwiched between three parallel electrode mounting plates 14 and waveguide rod mounting base 12, with each strip electrode 13 fixedly connected to the electrode mounting plate 14 above it, thus fixing the relative position of the strip electrode 13 and the electrode mounting plate 14.

[0035] By opening a slot at the bottom of the strip electrode 13, the circumferential positioning of the electrode pressure plate 15 can be achieved, while the vertical positioning of the electrode pressure plate 15 can be achieved through the corresponding electrode mounting plate 14 below it.

[0036] The number of first screws 17 is preferably three, and they are arranged along the length of the electrode mounting plate 14;

[0037] The second screw 18 is preferably two in number and is arranged along the length of the waveguide rod mounting base 12.

[0038] The function of waveguide rod 11 is to be inserted into the pulverized coal pipeline and conduct the mechanical energy of the pulverized coal impacting the waveguide rod. Its two ends extend out of the waveguide rod mounting seat 12, which is beneficial for the analysis of impact data. This structure is existing technology and will not be described in detail here.

[0039] The other end of the 7-shaped induction plate 16 passes horizontally through and extends out of the electrode mounting plate 14 for connecting cables.

[0040] The strip electrode 13 is used to extract the sensed coal powder charge for analysis.

[0041] The waveguide rod mounting base 12 has a limiting groove and a through hole connected in the horizontal direction. A rubber pad is installed in the limiting groove, and the waveguide rod 11 is sequentially inserted into the rubber pad and the through hole. In this design, the rubber pad is used to fix the waveguide rod and isolate the impact signal of coal dust on mechanical bodies other than the waveguide rod. Preferably, the top of the limiting groove is open.

[0042] A waveguide rod pressure plate 20 is fitted onto the end of the rubber pad away from the through hole, and the waveguide rod pressure plate 20 is fixed to the waveguide rod mounting base 12 by a fifth screw 21. This design limits the position of the rubber pad using the waveguide rod pressure plate 20 and the fifth screw 21. Preferably, there are two fifth screws 21, distributed on both sides of the waveguide rod 11. When installing the waveguide rod 11, first place the waveguide rod 11 and the rubber pad into the waveguide rod mounting base 12, adjust the insertion depth of the waveguide rod 11, and then fix the waveguide rod 11 using the waveguide rod pressure plate 20 and the fifth screw 21. A washer is provided between the screw and the waveguide rod pressure plate 20.

[0043] The mounting flange 3 and the protective cover 2 are sealed by an O-ring 6. This design uses the O-ring 6 to achieve a sealed connection between the protective cover 2 and the mounting flange 3, protecting the 7-shaped sensor 16, as well as the cables, adapter circuit boards, and other structures welded to the 7-shaped sensor, from dust and water.

[0044] The mounting flange 3 and the sensor body 1 are sealed by a gasket 7. This design, with the gasket 7, achieves a sealed connection between the mounting flange 3 and the sensor body 1, preventing water vapor and coal dust from entering the coal dust pipeline through the mounting surface of the mounting flange.

[0045] The protective cover 2 is used to protect the 7-shaped sensor chip, the cables and adapter circuit boards soldered on the 7-shaped sensor chip, etc., from dust and water, and can be connected to an external converter.

[0046] The protective cover 2 and the mounting flange 3 are secured together by a number of circumferentially distributed third screws 4. This design ensures a stable connection between the protective cover 2 and the mounting flange 3.

[0047] The upper part of the mounting flange 3 is fixed to the uppermost electrode mounting plate 14 by at least two fourth screws 5, and the lower part of the mounting flange 3 is fixed to the waveguide rod mounting seat 12 by at least two fourth screws 5. This design achieves a stable connection between the sensor body 1 and the mounting flange 3.

[0048] Each strip electrode 13 is fixed to its corresponding electrode mounting plate 14 above it by a sixth screw 22. Preferably, there are two sixth screws 22, arranged along the length of the strip electrode 13.

Claims

1. A wind-powder sensor, characterized in that: The device includes a sensor body (1), a protective cover (2), and a mounting flange (3), wherein the sensor body (1) and the mounting flange (3) are fixed together by a number of screws, and the protective cover (2) and the mounting flange (3) are also fixed together. The sensor body (1) includes a waveguide rod (11), a waveguide rod mounting base (12), three strip electrodes (13), three electrode mounting plates (14), three electrode pressure plates (15), and three 7-shaped sensing plates (16). The three electrode mounting plates (14) and the three strip electrodes (13) are arranged alternately from top to bottom, and the three electrode mounting plates (14) are fixed together by several first screws (17). Each strip electrode (13) is fixed to the electrode mounting plate (14) above it. (12) is arranged parallel to the bottommost strip electrode (13), and the waveguide rod mounting base (12) is fixed to the bottommost electrode mounting plate (14) by at least two second screws (18). The waveguide rod (11) is arranged horizontally and fixedly inserted into the waveguide rod mounting base (12). Both ends of the waveguide rod (11) extend out of the waveguide rod mounting base (12). The end face of each strip electrode (13), each electrode mounting plate (14), and the waveguide rod (11) mounting plate away from the shield (2) is an arc surface. Each strip electrode (13) has a slot at its bottom, and the electrode pressure plate (15) is correspondingly installed in the slot. One end of each of the three 7-shaped sensing plates (16) is clamped between the three strip electrodes (13) and the three electrode pressure plates (15), and the other end passes horizontally through and extends out of the electrode mounting plate (14).

2. The air-powder sensor according to claim 1, characterized in that: The waveguide rod mounting base (12) has a limiting groove and a through hole connected in the horizontal direction. A rubber pad is installed in the limiting groove, and the waveguide rod (11) is sequentially installed in the rubber pad and the through hole.

3. A wind-powder sensor according to claim 2, characterized in that: A waveguide rod pressure plate (20) is attached to one end of the rubber pad away from the through hole, and the waveguide rod pressure plate (20) and the waveguide rod mounting base (12) are fixed together by a fifth screw (21).

4. A wind-powder sensor according to claim 1, 2 or 3, characterized in that: The mounting flange (3) and the protective cover (2) are sealed by an O-ring (6).

5. A wind-powder sensor according to claim 1, characterized in that: The mounting flange (3) is sealed to the sensor body (1) by a gasket (7).

6. A wind-powder sensor according to claim 1, characterized in that: The protective cover (2) is fixed to the mounting flange (3) by a number of circumferentially distributed third screws (4).

7. A wind-powder sensor according to claim 1, characterized in that: The upper part of the mounting flange (3) is fixed to the uppermost electrode mounting plate (14) by at least two fourth screws (5), and the lower part of the mounting flange (3) is fixed to the waveguide rod mounting seat (12) by at least two fourth screws (5).

8. A wind-powder sensor according to claim 1, characterized in that: Each strip electrode (13) is fixed to its corresponding electrode mounting plate (14) above it by a sixth screw (22).

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