Ash bucket negative pressure detection device for dust remover

Abstract

The utility model relates to the technical field of dust removers, in particular to a dust hopper negative pressure detection device for a dust remover, which comprises a pressure gauge, a pressure gauge dial tube, an internal thread ball valve, an anti-blocking sampler, mounting tubes and protective channel steel, the mounting tubes are welded at different heights along the vertical direction of the dust hopper, and the anti-blocking sampler is obliquely inserted into the dust hopper through the mounting tubes and is vertically mounted. The pressure gauge is connected to an air outlet connecting pipe of the anti-blocking sampler through a pressure gauge dial pipe and an internal thread ball valve, three layers of anti-blocking mechanisms are arranged in the anti-blocking sampler and can filter dust and buffer air pressure fluctuation, and the protective channel steel covers the upper side of the mounting pipe to prevent ash block impact. The ash level height is judged by detecting the negative pressure value in the ash hopper, the problems of misinformation and rejection of a traditional level gage are solved, and the level gage has the advantages of being high in blocking resistance and measurement precision, convenient to maintain and the like.

Description

Technical Field

[0001] This utility model relates to the field of dust collector technology, specifically a negative pressure detection device for a dust collector hopper. Background Technology

[0002] In the field of industrial dust removal, the stable operation of the dust collector hopper is crucial to the efficiency and safety of the entire dust removal system. Most dust collectors are equipped with level gauges for material level alarms.

[0003] Currently, various types of level switches are used to detect the operating status of dust collector hoppers, including passive nuclear non-contact type, intelligent radio frequency admittance type, tuning fork type, vibrating rod type, and rotary paddle type. When the ash level in the hopper reaches the height of the level gauge, the level gauge probe senses the dust and sends an alarm signal. Maintenance personnel then promptly discharge ash and inspect the hopper based on the alarm signal. However, these level switches are frequently affected by changes in the ash quality and viscosity of fly ash, as well as the limitations of the equipment itself, often leading to malfunctions, false alarms, or false alarms, making it impossible for operators to accurately determine the operating status of the dust collector hopper.

[0004] Therefore, this technical solution proposes a negative pressure detection device for dust collector hoppers. Utility Model Content

[0005] The purpose of this invention is to provide a negative pressure detection device for a dust collector hopper to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A negative pressure detection device for a dust collector hopper includes a pressure gauge, an internal threaded ball valve, an anti-clogging sampler, a protective channel steel, and a dust collector hopper. The anti-clogging sampler is inserted obliquely into the dust collector hopper through an installation pipe and is kept vertically installed. The pressure gauge is connected to the top outlet pipe of the anti-clogging sampler through a pressure gauge coil and the internal threaded ball valve. The protective channel steel is installed on the inner wall of the dust collector hopper.

[0008] The anti-clogging sampler includes a three-layer anti-clogging mechanism, consisting of a primary filter, a secondary buffer chamber, and a tertiary flow guide grid. This mechanism filters dust and stabilizes airflow. The three-layer anti-clogging mechanism buffers the gas, preventing excessive fluctuations in measured wind pressure and inaccurate measurement results.

[0009] Compared with the prior art, the beneficial effects of this utility model are: the three-stage anti-clogging mechanism filters dust, avoids pipe blockage, and reduces maintenance frequency;

[0010] Pressure fluctuations are buffered by the pressure gauge coil, and data stability is ensured by combining it with a vertically installed anti-clogging sampler.

[0011] The modular design supports welding and installation at various heights, adapting to different working conditions.

[0012] The inverted U-shaped channel steel effectively resists the impact of ash blocks and extends the service life of the equipment;

[0013] The detachable flange structure and internally threaded ball valve design facilitate quick cleaning and component replacement. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a negative pressure detection device for a dust collector hopper.

[0015] Figure 2 This is a partially enlarged schematic diagram of a negative pressure detection device for a dust collector hopper.

[0016] Figure 3 This is a schematic diagram of the anti-clogging sampler in a negative pressure detection device for a dust collector hopper.

[0017] Among them: 1-pressure gauge, 2-pressure gauge coil, 3-internal threaded ball valve, 4-anti-clogging sampler, 5-installation pipe, 6-protective channel steel, 7-dust collector ash hopper. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly 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 mechanical connection or an electrical 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.

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] Please see Figures 1-3 A negative pressure detection device for a dust collector hopper includes a pressure gauge 1, an internal threaded ball valve 3, an anti-clogging sampler 4, a protective channel steel 6, and a dust collector hopper 7. The anti-clogging sampler 4 is inserted obliquely into the dust collector hopper 7 through an installation pipe 5 and is kept vertically installed. The pressure gauge 1 is connected to the top outlet pipe of the anti-clogging sampler 4 through a pressure gauge coil 2 and the internal threaded ball valve 3. The protective channel steel 6 is installed on the inner wall of the dust collector hopper 7.

[0023] The anti-clogging sampler 4 includes a three-layer anti-clogging mechanism, consisting of a primary filter, a secondary buffer chamber, and a tertiary flow guide grid. These mechanisms are used to filter dust and stabilize airflow. The three-layer anti-clogging mechanism can buffer the gas and prevent excessive fluctuations in the measured wind pressure, which could lead to inaccurate measurement results.

[0024] The primary filter screen is made of corrosion-resistant stainless steel with a mesh size of 2-3mm. It is installed at an angle of 30° at the inlet end of the anti-clogging sampler 4 to intercept large particles of dust (such as ash slag with a diameter ≥3mm) in the dust collector ash hopper 7, preventing them from directly entering the subsequent pipeline and preventing probe blockage.

[0025] Optionally, a vibrating motor or manual dust removal handle can be installed on the primary filter screen to periodically vibrate and shake off accumulated dust. Detailed installation and types will not be described here.

[0026] The secondary buffer chamber is a conical cavity located behind the primary filter screen, with a volume of 300-500mL. The inner wall is equipped with a spiral guide plate. By increasing the cross-sectional area of ​​the cavity, the airflow velocity is reduced, which promotes the settling of suspended dust due to gravity.

[0027] The spiral guide plate guides the airflow to rotate, and uses centrifugal force to separate medium-sized dust particles (0.5-2mm) to the bottom of the cavity. At the same time, there is a dust discharge port at the bottom of the cavity, and the dust is discharged periodically by a ball valve.

[0028] The three-stage flow guide grid consists of several staggered ceramic flow guide plates with a spacing of 1 mm. The surface is coated with a polytetrafluoroethylene (PTFE) anti-stick coating. The three-stage flow guide grid is used to further intercept fine dust of ≤0.5 mm. At the same time, the labyrinth flow channel design disperses the airflow, eliminates turbulence, and stabilizes air pressure fluctuations (fluctuation range ≤±10 Pa).

[0029] Preferably, the ceramic sheet is resistant to high temperatures (≤300℃), and the PTFE coating reduces dust adhesion and prevents grid clogging;

[0030] The dust-laden airflow passes through a primary filter to intercept large particles, a secondary buffer chamber to slow down and settle medium particles, and a tertiary flow guide grid for fine filtration and pressure stabilization. Finally, the clean airflow enters the pressure gauge pipeline to ensure stable and reliable measurement values.

[0031] The connection between the anti-clogging sampler 4 and the installation pipe 5 is equipped with a detachable flange structure, which facilitates dust removal and maintenance.

[0032] Specifically, the detachable flange structure includes a flange, connecting bolts, and sealing gaskets; close the internal threaded ball valve 3 to cut off the airflow, remove the connecting bolts, separate the anti-clogging sampler 4 from the installation pipe 5, remove the old gasket and clean the flange sealing surface, replace the new gasket, and then tighten the bolts again.

[0033] The protective channel steel 6 is set as an inverted U-shaped structure, welded to the inner wall of the ash hopper 7 and distributed on the upper part of the installation pipe 5; the protective channel steel 6 is used to block the ash blocks falling in the dust collector ash hopper 7 due to ash level fluctuations or ash discharge process, and prevent them from directly hitting the installation pipe 5 and causing deformation or breakage. At the same time, the arc-shaped top of the inverted U-shaped channel steel can guide the falling ash blocks to both sides, reducing the concentration of impact force.

[0034] Preferably, the protective channel steel 6 is made of Q235B carbon steel with hot-dip galvanizing treatment, which is corrosion resistant and wear resistant.

[0035] The pressure gauge coil 2 is a spiral metal hose with a length of not less than 30cm, used to buffer pressure fluctuations.

[0036] The three-stage flow guide grid consists of staggered ceramic plates with a spacing of 1-2 mm and a non-stick coating on the surface.

[0037] A sealing gasket made of high-temperature resistant silicone rubber is provided between the valve body of the internal thread ball valve 3 and the anti-clogging sampler 4.

[0038] The operation process of this utility model is as follows: Pressure detection: Changes in the ash level in the dust collector hopper 7 cause changes in the negative pressure value at different heights. When the ash level reaches the height of the anti-clogging sampler 4, the air pressure inside the sampler changes from negative pressure to ≥0 Pa, and the pressure gauge 4 displays the change in value.

[0039] The dust-laden airflow passes through a primary filter to intercept large dust particles, a secondary buffer chamber to slow down the flow rate, and a tertiary guide grid to further separate fine particles, ensuring that clean airflow enters the pressure gauge.

[0040] If the pipeline is blocked, close the internal thread ball valve 3, remove the flange nut of the anti-blockage sampler 4, and use compressed air to blow away the accumulated dust in the reverse direction;

[0041] Multiple detection devices are installed vertically along the ash hopper to accurately determine the ash distribution by comparing pressure values ​​at different heights.

[0042] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A dust collector ash hopper negative pressure detection device characterized by, The device includes a pressure gauge (1), an internal thread ball valve (3), an anti-clogging sampler (4), a protective channel steel (6), and a dust collector hopper (7). The anti-clogging sampler (4) is inserted obliquely into the dust collector hopper (7) through an installation pipe (5) and kept vertically installed. The pressure gauge (1) is connected to the internal thread ball valve (3) through a pressure gauge coil (2) and is connected to the top air outlet pipe of the anti-clogging sampler (4). The protective channel steel (6) is installed on the inner wall of the dust collector hopper (7).

2. The dust collector ash bin negative pressure detection device according to claim 1, characterized in that, The anti-clogging sampler (4) includes a three-layer anti-clogging mechanism, consisting of a primary filter, a secondary buffer chamber, and a tertiary flow guide grid, used to filter dust and stabilize airflow.

3. The dust collector ash bin negative pressure detection device according to claim 1, characterized in that, The connection between the anti-blocking sampler (4) and the installation pipe (5) is provided with a detachable flange structure.

4. The dust collector hopper negative pressure detection device according to claim 1, characterized in that, The protective channel steel (6) has an inverted U-shaped structure, is welded to the inner wall of the ash hopper (7), and wraps around the upper side of the installation pipe (5).

5. The dust collector ash bin negative pressure detection device according to claim 1, characterized in that, The pressure gauge coil (2) is a spiral metal hose.

6. The dust collector ash bin negative pressure detection device according to claim 2, characterized in that: The three-stage flow guide grid consists of staggered ceramic sheets with a spacing of 1-2 mm and a non-stick coating on the surface.

7. The dust collector ash bin negative pressure detection device according to claim 1, characterized in that: The internal thread ball valve (3) has a sealing gasket between its valve body and the anti-clogging sampler (4), which is made of high-temperature resistant silicone rubber.

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