Cloth bag dust removal equipment and dust removal method in mineral product sample preparation

Abstract

The invention provides cloth bag dust removal equipment and a dust removal method in mineral product sample preparation, and relates to the technical field of cloth bag dust removal, and the cloth bag dust removal equipment comprises a cloth bag dust remover main body, an air outlet pipe group, a controllable cut-off assembly and a backflow cleaning assembly. According to the bag-type dust collector, by designing the controllable cut-off assembly and the backflow cleaning assembly, part of airflow in the dust collection working process of the bag-type dust collector body can be guided into the backflow cleaning assembly, a vortex-induced vibration assembly of the backflow cleaning assembly is driven to vibrate, and the vortex-induced vibration assembly directly acts in the bag-type dust collector body; the vibration is easily transmitted and acts on the cylindrical cloth bag of the bag-type dust collector main body, and the cleaning work of the cylindrical cloth bag can be completed by low-power vibration; and compared with the traditional mode of cleaning the cloth bag by adopting pulse reverse circulation, the dust removal operation process does not need to be stopped.

Description

Technical Field

[0001] The present invention relates to the technical field of bag dust removal, and specifically to a bag dust removal device and a dust removal method in mineral sample preparation. Background Art

[0002] In the process of development and utilization of mineral resources, sample preparation is the core link to ensure the accuracy of ore quality analysis, involving processes such as crushing, screening, grinding, and splitting. However, these physical processing processes will inevitably generate a large amount of dust. In particular, mineral particles have the characteristics of wide particle size distribution, high density, and easy dispersion. The escape of dust not only poses a threat to the respiratory health of operators, but also pollutes the workshop environment, affects the stability of precision instruments, and even causes cross-contamination of samples, reducing the credibility of test results.

[0003] Bag dust removal is one of the means of dust control. It mainly captures particulate matter in the dust-containing gas stream through filter bags and collects dust inside the housing. After a period of use, dust will accumulate on the surface of the filter bag (bag), affecting gas flow and reducing the dust removal efficiency. Therefore, the filter bag needs to be cleaned regularly. Currently, the commonly used methods mainly include two types: one is to reverse the flow of air (pulse air flow) into the bag, and the air flow impacts the bag to make the dust break away from the surface of the filter bag. In this process, the equipment needs to be shut down and carried out at a specific time, which may affect normal operations. The other is to use an additional vibration device to vibrate the filter bag to make the dust break away from the surface of the filter bag. Generally, the vibration device cannot be arranged inside the bag dust collector for a long time (the inside of the bag dust collector is in a dust environment for a long time). Based on the fact that transmitting vibration from the outer shell of the bag dust collector to the filter bag has an insignificant effect or requires a large power / long action time of the vibration device, this brings problems of inconvenient use and high use cost. Therefore, the present invention provides a bag dust removal device and a dust removal method in mineral sample preparation. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a bag dust removal device and a dust removal method in mineral sample preparation, which solve the problems that traditional bag dust collectors need to be shut down / when cleaning the dust accumulated on the surface of the filter bag (bag), they are inconvenient to use and have high use costs.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A bag dust removal device in mineral sample preparation, comprising: The main body of the bag dust collector, on the side of which an air outlet pipe group is arranged. The air outlet pipe group includes: a pipe, and a centrifugal fan with adjustable flow rate installed on the pipe; A controllable current intercepting component, the controllable current intercepting component having a first air inlet, a first air outlet interface, and a second air outlet interface, the first air inlet communicating with the first air outlet interface, the first air inlet being controllably communicated with / blocked from the second air outlet interface, and the first air inlet being connected to the air outlet end of an air outlet pipe group; A reflux cleaning component, the reflux cleaning component including: a drainage pipe and a vortex-induced vibration component, the vortex-induced vibration component being arranged inside the main body of the bag filter, a first end of the drainage pipe being connected to the second air outlet interface, and a second end of the drainage pipe being connected to the vortex-induced vibration component.

[0006] Preferably, the main body of the bag filter includes: A main housing, the top of the main housing being open, a guiding portion being provided at the bottom of the main housing, a dust collection port being fixedly provided at the bottom end of the guiding portion, and a gas inlet being fixedly provided on the side surface of the main housing; An upper cover, the upper cover being fixedly installed at the top of the main housing, and a gas discharge port being fixedly provided at the top of the upper cover; A cylindrical cloth bag, a top mounting plate being hermetically and fixedly installed inside the main housing and near the open top of the main housing, mounting holes being provided on the top mounting plate and corresponding in number to the cylindrical cloth bags, a ring-shaped member being fixedly provided at the top end of the cylindrical cloth bag, and the ring-shaped member being fixedly clamped inside the mounting holes; A bottom support plate, the bottom support plate being installed inside the main housing through an elastic frame, a dust falling hole being provided on the bottom support plate, a metal head corresponding to each cylindrical cloth bag being fixedly installed on the top of the bottom support plate, a flat-top cone head being provided on the top of the metal head, and the bottom end of the cylindrical cloth bag being fixedly installed with the flat-top cone head through screws; The vortex-induced vibration component is installed at the bottom of the bottom support plate.

[0007] Preferably, the elastic frame includes: a bottom frame, a top frame, and an elastic filling member located between the bottom frame and the top frame, one end of the bottom frame being fixedly connected to one end of the top frame.

[0008] Preferably, the controllable current intercepting component includes: An outer pipe body, a shrinkable joint being provided at the bottom of the outer pipe body, the bottom end of the shrinkable joint being the first air inlet, the bottom end of the shrinkable joint being connected to the air outlet end of the air outlet pipe group, and the first air outlet interface being provided on the side surface of the outer pipe body; A top plate, the top plate being fixedly installed inside the outer pipe body, a through hole being provided on the top plate, and a sealing ring member being hermetically and fixedly installed inside the through hole; An inner pipe body, the inner pipe body being located inside the outer pipe body, the top end of the inner pipe body being fixedly connected to the top plate, the sealing ring member corresponding to the center of the inner pipe body, and a second air outlet interface being fixedly connected to the side surface of the inner pipe body, the second air outlet interface passing through the side wall of the outer pipe body and extending to the outside of the outer pipe body; A flow - intercepting conical head, a fitting seat is non - fixedly connected to the inner side of the inner pipe body and near the bottom end. A conical hole is provided at the center of the fitting seat. The flow - intercepting conical head is arranged inside the conical hole. The flow - intercepting conical head is a shell part, and side air holes are provided on the conical side of the flow - intercepting conical head. Bottom air holes are opened on the bottom surface of the flow - intercepting conical head; An electric - drive telescopic member, the electric - drive telescopic member is fixedly installed upside - down at the top end of the outer pipe body, and the telescopic end of the electric - drive telescopic member is located inside the outer pipe body; A transmission rod, the transmission rod is slidably installed inside the sealing ring member, the top end of the transmission rod is fixedly installed with the telescopic end of the electric - drive telescopic member, and the bottom end of the transmission rod is fixedly installed with the top end of the flow - intercepting conical head.

[0009] Preferably, the connection part of the first air - outlet interface and the outer pipe body is located outside the inner pipe body.

[0010] Preferably, the drainage pipe includes: a guiding pipe part, a header section, and a sub - branch pipe section connected in sequence. The sub - branch pipe section is fixedly connected to the main housing, and one end of the sub - branch pipe section is located inside the main housing, and one end of the sub - branch pipe section is connected to the vortex - induced vibration assembly.

[0011] Preferably, multiple groups of the sub - branch pipe sections and the vortex - induced vibration assemblies are provided.

[0012] Preferably, the vortex - induced vibration assembly includes: A square - pipe channel, vertical guiding holes are opened on the side surface of the square - pipe channel; A sliding shaft, the sliding shaft is slidably installed inside the guiding hole, and a cylinder is fixedly connected to the sliding shaft and located inside the square - pipe channel; A spring, a side plate is fixedly installed outside the square - pipe channel, one end of the spring is fixedly connected to the side plate, and the other end of the spring is fixedly connected to the sliding shaft.

[0013] Preferably, multiple groups of the guiding holes, sliding shafts, cylinders, springs, and side plates are arranged along the length direction of the square - pipe channel.

[0014] A dust - removal method, using the bag - type dust - removal equipment in the above - mentioned mineral sample preparation, specifically includes the following steps: Dust - removal operation Control the first air - inlet and the second air - outlet interfaces to be cut off. The centrifugal fan with adjustable flow rate in the air - outlet pipe group operates, driving the dust - carrying air flow to pass through the main body of the bag - type dust collector. The dust - carrying air flow is dust - removed in the main body of the bag - type dust collector. The cleaned air flow after dust - removal passes through the area between the first air - inlet and the first air - outlet interfaces of the air - outlet pipe group and the controllable flow - intercepting component, and is discharged from the first air - outlet interface; Bag cleaning During the dust removal operation, the first air inlet is controlled to communicate with the second air outlet interface, and the power of the centrifugal fan with adjustable flow rate is increased. During the synchronous implementation of the dust removal operation, part of the cleaned air flow after dust removal passes through the area between the first air inlet and the second air outlet interface of the controllable throttling component, then enters the reflux cleaning component from the second air outlet interface, and then drives the vortex-induced vibration component to vibrate to clean the cloth bag of the main body of the bag filter. The air flow after driving the vortex-induced vibration component to vibrate passes through the main body of the bag filter and the air outlet pipe group again during the dust removal operation and enters the controllable throttling component.

[0015] The present invention provides a bag dust removal device and a dust removal method in mineral sample preparation. It has the following beneficial effects: 1. In the present invention, by designing the controllable throttling component and the reflux cleaning component, part of the air flow during the dust removal process of the main body of the bag filter can be guided into the reflux cleaning component, driving the vortex-induced vibration component of the reflux cleaning component to vibrate, and the vortex-induced vibration component directly acts inside the main body of the bag filter, which is easy to transfer and act on the cylindrical cloth bag of the main body of the bag filter. The cleaning work of the cylindrical cloth bag can be completed with a small power vibration; compared with the traditional method of cleaning the cloth bag by pulse reverse circulation, it does not need to stop the dust removal operation process; compared with arranging a vibration device outside the main body of the bag filter, it is located inside the main body of the bag filter, and the effect is better, and it can directly act on the cylindrical cloth bag of the main body of the bag filter by relying on a small amplitude of vibration, reducing the damage to the main body of the bag filter, and does not require an additional power source, can be operated at any time, and has a good use effect. Without an additional power source and vibration device, the cost is also reduced.

[0016] 2. In the present invention, through the specific design of the arrangement and installation structure of the cylindrical cloth bag inside the main body of the bag filter, the top mounting plate and the bottom support plate are used to tension and fix the cylindrical cloth bag at the upper and lower ends, and the vortex-induced vibration component is installed at the bottom of the bottom support plate. The design of this structure is more conducive to the transmission of vibration and ensures the cleaning effect of the cylindrical cloth bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of a bag dust removal device in mineral sample preparation proposed by the present invention; Figure 2 is a front view of a bag dust removal device in mineral sample preparation proposed by the present invention; Figure 3 is a top view of a bag dust removal device in mineral sample preparation proposed by the present invention; Figure 4 is a side view of a bag dust removal device in mineral sample preparation proposed by the present invention; Figure 5 is Figure 2 a cross-sectional view taken along the section line A-A in Figure 6 is Figure 5 The partial enlarged view at position C in Figure 7 is Figure 4 The sectional view of the section line B - B in Figure 8 The schematic diagram of the cloth bag distribution of a cloth bag dust removal device in ore sample preparation proposed by the present invention; Figure 9 The schematic diagram of the cloth bag distribution of a cloth bag dust removal device in ore sample preparation proposed by the present invention; Figure 10 is Figure 9 The partial enlarged view at position D in Figure 11 The schematic diagram of the cloth bag installation of a cloth bag dust removal device in ore sample preparation proposed by the present invention; Figure 12 The three - dimensional schematic diagram of the reflux cleaning component of a cloth bag dust removal device in ore sample preparation proposed by the present invention; Figure 13 The three - dimensional schematic diagram of the vortex - induced vibration component of a cloth bag dust removal device in ore sample preparation proposed by the present invention; Figure 14 is Figure 13 The partial enlarged view at position E in Figure 15 The three - dimensional schematic diagram of the intercepting cone head and the mating seat of a cloth bag dust removal device in ore sample preparation proposed by the present invention.

[0018] Among them, 1. Bag filter main body; 101. Main housing; 101a. Guide part; 102. Dust collection port; 103. Upper cover; 104. Gas inlet; 105. Gas outlet; 106. Top mounting plate; 107. Cylindrical cloth bag; 107a. Ring part; 108. Metal head; 108a. Flat top cone head; 109. Bottom support plate; 1010. Elastic frame; 1010a. Bottom frame; 1010b. Top frame; 1010c. Elastic filling part; 2. Outlet air pipe group; 201. Pipe; 202. Centrifugal fan with adjustable flow rate; 3. Return flow cleaning component; 301. Guide pipe part; 302. Header section; 303. Sub-branch pipe section; 304. Vortex-induced vibration component; 304a. Square pipe channel; 304b. Guide hole; 304c. Sliding shaft; 304d. Cylinder; 304e. Side plate; 304f. Spring; 4. Controllable throttling component; 401. Outer pipe body; 402. Shrinkable joint; 403. First air outlet interface; 404. Top plate; 405. Sealing ring part; 406. Electrically driven telescopic part; 407. Second air outlet interface; 408. Inner pipe body; 409. Transmission rod; 4010. Fitting seat; 4011. Throttling cone head; 4011a. Side air holes; 4011b. Bottom air holes. Specific embodiments

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0020] As Figure 1 - Figure 15 shown, the embodiment of the present invention provides a bag dust removal device in mineral sample preparation, which is used to clean / collect the dust generated in the processes of crushing, screening, grinding, and sample reduction in mineral sample preparation. Specifically, it includes: a bag filter main body 1, an outlet air pipe group 2, a controllable throttling component 4, and a return flow cleaning component 3, which can realize the normal dust removal operation process and the bag cleaning process.

[0021] Specifically, an air outlet pipe group 2 is provided on the side of the main body 1 of the bag filter. The air outlet pipe group 2 includes: a pipe 201 and a centrifugal fan 202 with adjustable flow rate installed on the pipe 201. The centrifugal fan 202 with adjustable flow rate provides power to drive the air flow to flow through the air outlet pipe group 2, that is, to attract the air flow inside the main body 1 of the bag filter, forming an air flow inside the main body 1 of the bag filter. The gas inlet of the main body 1 of the bag filter is connected to a pipe for collecting gas, and the collected gas carrying dust is sent into the main body 1 of the bag filter. According to the length of the pipe for collecting gas, a booster fan can be installed on the pipe for collecting gas. The ultimate purpose is to ensure that the air flow can smoothly pass through the main body 1 of the bag filter to achieve the purpose of filtering and dust removal. The controllable throttling component 4 has a first air inlet, a first air outlet interface 403, and a second air outlet interface 407. The first air inlet is communicated with the first air outlet interface 403, and the first air inlet is controllably communicated / blocked with the second air outlet interface 407. The first air inlet is connected to the air outlet end of the air outlet pipe group 2. During the general dust removal operation, the air flow sent out by the air outlet pipe group 2 passes through the area between the first air inlet and the first air outlet interface 403 and is discharged from the first air outlet interface 403. That is, the controllable throttling component 4 only plays a general channel role. The reflux cleaning component 3 includes: a drainage pipe and a vortex-induced vibration component 304. The vortex-induced vibration component 304 is arranged inside the main body 1 of the bag filter. The first end of the drainage pipe is connected to the second air outlet interface 407, and the second end of the drainage pipe is connected to the vortex-induced vibration component 304. During the bag cleaning process, the channel between the first air inlet and the second air outlet interface 407 is opened. Part of the clean air flow coming out of the air outlet end of the air outlet pipe group 2 is guided to pass through the area between the first air inlet and the second air outlet interface 407 and flows into the drainage pipe from the second air outlet interface 407. The clean air flow enters the inside of the main body 1 of the bag filter through the vortex-induced vibration component 304. This process drives the vortex-induced vibration component 304 to vibrate, playing a vibrating role inside the main body 1 of the bag filter, acting on the cylindrical bag 107 of the main body 1 of the bag filter to clean the cylindrical bag 107. Compared with the traditional method of cleaning the bag by pulse reverse circulation, it does not require stopping the dust removal operation process. Compared with arranging a vibration device outside the main body 1 of the bag filter, it is located inside the main body 1 of the bag filter, and the effect is better. Moreover, it can directly act on the cylindrical bag 107 of the main body 1 of the bag filter by a small amplitude of vibration, reducing the damage to the main body 1 of the bag filter, and does not require an additional power source, and can be operated at any time with good use effect.

[0022] During the dust removal operation, the first air inlet and the second air outlet interface 407 are controlled to be cut off, and the centrifugal fan 202 with adjustable flow rate in the air outlet pipe group 2 operates, driving the airflow carrying dust through the main body 1 of the bag filter. The airflow carrying dust is dust-removed (filtered) in the main body 1 of the bag filter. The cleaned airflow after dust removal passes through the area between the first air inlet and the first air outlet interface 403 of the controllable throttling component 4 and is discharged from the first air outlet interface 403; when the bag needs to be cleaned, during the dust removal operation, the first air inlet and the second air outlet interface 407 are controlled to be connected, and the power of the centrifugal fan 202 with adjustable flow rate is increased. During the process of synchronously realizing the dust removal operation, part of the cleaned airflow after dust removal passes through the area between the first air inlet and the second air outlet interface 407 of the controllable throttling component 4, then enters the reflux cleaning component 3 from the second air outlet interface 407, and then drives the vortex-induced vibration component 304 to vibrate to clean the bag in the main body 1 of the bag filter. The airflow after driving the vortex-induced vibration component 304 to vibrate passes through the main body 1 of the bag filter and the air outlet pipe group 2 again during the dust removal operation and enters the controllable throttling component 4.

[0023] The calculation process of increasing the power of the centrifugal fan 202 with adjustable flow rate is based on the predetermined working flow rate Q1 of the main body 1 of the bag filter and the circulating working flow rate Q2 passing through the area between the first air inlet and the second air outlet interface 407 of the controllable throttling component 4, then entering the reflux cleaning component 3 from the second air outlet interface 407, and then passing through the main body 1 of the bag filter and the air outlet pipe group 2 and entering the controllable throttling component 4. The power of the centrifugal fan 202 with adjustable flow rate is increased so that the generated flow rate Q is not less than Q1 + Q2.

[0024] In an embodiment, the main body 1 of the bag filter includes: a main housing 101, an upper cover 103, a cylindrical bag 107, a top mounting plate 106, a metal head 108, a bottom support plate 109, and an elastic frame 1010.

[0025] The top of the main housing 101 is open, facilitating the installation of various components inside the main housing 101. A guiding portion 101a is provided at the bottom of the main housing 101. The guiding portion 101a has a structure that slopes and contracts, facilitating the guiding of dust to fall. A dust collection port 102 is fixedly provided at the bottom end of the guiding portion 101a. During use, a dust collection cylinder is installed at the dust collection port 102 or inserted into a water pool to collect the dust falling at the dust collection port 102. A gas inlet 104 is fixedly provided on the side of the main housing 101. The gas inlet 104 is connected to the outlet end of the dust collection system designed in the factory building. The upper cover 103 is fixedly installed at the top of the main housing 101. The upper cover 103 and the main housing 101 form a chamber. A gas discharge port 105 is fixedly provided at the top of the upper cover 103. The cleaned gas is discharged through the gas discharge port 105. A top mounting plate 106 is hermetically and fixedly installed inside the main housing 101 and near the top opening of the main housing 101. Installation holes equal in number to the cylindrical cloth bags 107 are provided on the top mounting plate 106. An annular member 107a is fixedly provided at the top end of the cylindrical cloth bag 107. The annular member 107a is fixedly clamped inside the installation hole. The bottom support plate 109 is installed inside the main housing 101 through an elastic frame 1010, enabling the bottom support plate 109 to have the function of transmitting / enhancing elastic vibration. Dust falling holes are provided on the bottom support plate 109. Generally, dust falling holes are also formed between the outside of the bottom support plate 109 and the inside of the main housing 101. Dust falls through the dust falling holes. A metal head 108 corresponding to each cylindrical cloth bag 107 is fixedly installed on the top of the bottom support plate 109. A flat-top cone head 108a is provided at the top of the metal head 108. The bottom end of the cylindrical cloth bag 107 is fixedly installed with the flat-top cone head 108a through screws. The metal head 108 directly transmits vibration to the cylindrical cloth bag 107. The vortex-induced vibration assembly 304 is installed at the bottom of the bottom support plate 109.

[0026] During the dust removal operation, the airflow carrying dust flows into the area below the top mounting plate 106 inside the main housing 101 through the gas inlet 104. The airflow needs to pass through the cylindrical cloth bags 107 to enter the area above the top mounting plate 106, realizing the filtration of the gas carrying dust. The dust falls / attaches to the side of the cylindrical cloth bags 107. The cleaned gas after filtration passes upward through the gas discharge port 105 and is discharged. During the cleaning process of the cloth bags, the vortex-induced vibration assembly 304 generates vibration, which acts on the bottom support plate 109. Since the bottom support plate 109 is installed inside the main housing 101 through the elastic frame 1010, the bottom support plate 109 can transmit / enhance elastic vibration and drive the metal head 108 to vibrate, thereby driving the cylindrical cloth bags 107 to vibrate and vibrating off the dust attached to the outer surface of the cylindrical cloth bags 107, realizing the function of cleaning the dust on the outer surface of the cylindrical cloth bags 107. In one embodiment, the elastic frame 1010 includes: a bottom frame 1010a, a top frame 1010b, and an elastic filling member 1010c located between the bottom frame 1010a and the top frame 1010b. One end of the bottom frame 1010a is fixedly connected to one end of the top frame 1010b.

[0027] The bottom frame 1010a and the top frame 1010b can be formed by bending a group of sheet-like long-strip metal pieces, and the elastic filling member 1010c is fixedly glued between the bottom frame 1010a and the top frame 1010b. The formed elastic frame 1010 has good elasticity and the function of preventing vibration from being transmitted to the inner wall of the main housing 101.

[0028] In one embodiment, the controllable current-cutoff assembly 4 is composed of a three-way pipe and a stop valve, and the stop valve is installed on the branch where the second air outlet interface 407 is located.

[0029] In one embodiment, the controllable current-cutoff assembly 4 includes: an outer pipe body 401, a top plate 404, a sealing ring member 405, an inner pipe body 408, a current-cutoff cone head 4011, an electric drive telescopic member 406, and a transmission rod 409.

[0030] A shrinkable joint 402 is provided at the bottom of the outer pipe body 401. The bottom end of the shrinkable joint 402 is the first air inlet, and the bottom end of the shrinkable joint 402 is connected to the air outlet end of the air outlet pipe group 2. The first air outlet interface 403 is provided on the side of the outer pipe body 401. The top plate 404 is fixedly installed inside the outer pipe body 401. A through hole is opened on the top plate 404, and a sealing ring member 405 is fixedly installed inside the through hole in a sealed manner. The inner pipe body 408 is located inside the outer pipe body 401, and the top end of the inner pipe body 408 is fixedly connected to the top plate 404, and the sealing ring member 405 corresponds to the center of the inner pipe body 408. The second air outlet interface 407 is fixedly connected to the side of the inner pipe body 408, and the second air outlet interface 407 penetrates through the side wall of the outer pipe body 401 and extends to the outside of the outer pipe body 401. A mating seat 4010 is non-fixedly connected to the inner side of the inner pipe body 408 and near the bottom end. A tapered hole is provided at the center of the mating seat 4010. The current-cutoff cone head 4011 is arranged inside the tapered hole. The current-cutoff cone head 4011 is a shell member, and side air holes 4011a are provided on the tapered side of the current-cutoff cone head 4011. Bottom air holes 4011b are opened on the bottom surface of the current-cutoff cone head 4011. The electric drive telescopic member 406 is fixedly installed upside down at the top of the outer pipe body 401. The telescopic end of the electric drive telescopic member 406 is located inside the outer pipe body 401. The transmission rod 409 is slidably installed inside the sealing ring member 405, and the top end of the transmission rod 409 is fixedly installed with the telescopic end of the electric drive telescopic member 406. The bottom end of the transmission rod 409 is fixedly installed with the top end of the current-cutoff cone head 4011.

[0031] The drive rod 409 is driven to move downward by the electrostrictive element 406, thereby driving the throttling cone head 4011 to move downward. A gap is formed between the side surface of the throttling cone head 4011 and the inner side of the mating seat 4010, and gas can flow into the inner tube body 408 through this gap and then into the second air outlet interface 407. In order to make the flow rate intercepted by the throttling cone head 4011 larger, side air holes 4011a are provided on the conical side surface of the throttling cone head 4011, and bottom air holes 4011b are opened on the bottom surface of the throttling cone head 4011. The bottom surface of the throttling cone head 4011 is a relatively large plane, which can contact more air flow. The air flow enters the inside of the throttling cone head 4011 through the bottom air holes 4011b and then flows into the inner tube body 408 from the side air holes 4011a on the side surface of the throttling cone head 4011.

[0032] In one embodiment, the connection between the first air outlet interface 403 and the outer tube body 401 is located outside the inner tube body 408, giving priority to ensuring that a larger air flow is received at the bottom end of the inner tube body 408 and then diverted to the annular region between the inner tube body 408 and the outer tube body 401.

[0033] In one embodiment, the drain pipe includes: a guiding pipe portion 301, a header section 302, and a sub-branch pipe section 303 that are connected in sequence. The sub-branch pipe section 303 is fixedly connected to the main housing 101, and one end of the sub-branch pipe section 303 is located inside the main housing 101, and one end of the sub-branch pipe section 303 is connected to the vortex-induced vibration assembly 304.

[0034] In one embodiment, multiple sets of the sub-branch pipe section 303 and the vortex-induced vibration assembly 304 are provided to improve the vibration effect (designed according to the number of cylindrical cloth bags 107).

[0035] Vortex-induced vibration (VIV for short), its principle: A bluff body (cylinder) is placed in the pipeline. When the air flow bypasses the bluff body, periodically shedding vortices (Karman vortex street) are generated, causing the downstream flexible structure to vibrate.

[0036] In one embodiment, the vortex-induced vibration assembly 304 includes: a square pipe channel 304a, a sliding shaft 304, a cylinder 304d, a spring 304f, and a side plate 304e.

[0037] The side surface of the square pipe channel 304a is provided with a vertically arranged guiding hole 304b. The sliding shaft 304 is slidably installed inside the guiding hole 304b. A cylinder 304d is fixedly connected to the sliding shaft 304 and located inside the square pipe channel 304a. A side plate 304e is fixedly installed outside the square pipe channel 304a. One end of the spring 304f is fixedly connected to the side plate 304e, and the other end of the spring 304f is fixedly connected to the sliding shaft 304.

[0038] The air flow passes through the square pipe channel 304a and generates vortex-induced vibration when it encounters the cylinder 304d. The cylinder 304d and the sliding shaft 304 vibrate up and down. The volume of the square pipe channel 304a is small, and the vortex-induced vibration can drive the vibration of the square pipe channel 304a.

[0039] In one embodiment, multiple groups of guiding holes 304b, sliding shafts 304, cylinders 304d, springs 304f, and side plates 304e are arranged along the length direction of the square pipe channel 304a to improve the vibration effect (designed according to the number of cylindrical cloth bags 107). Embodiment

[0040] This embodiment provides a dust removal method, which uses the bag dust removal equipment in the mineral sample preparation in the first embodiment, and specifically includes the following steps: Dust removal operation Control the first air inlet and the second air outlet interface 407 to be cut off, and the centrifugal fan 202 with adjustable flow rate in the air outlet pipe group 2 operates to drive the airflow carrying dust through the bag dust collector main body 1. The airflow carrying dust is dust-removed in the bag dust collector main body 1, and the cleaned airflow after dust removal passes through the area between the first air inlet and the first air outlet interface 403 of the controllable throttling component 4 and is discharged from the first air outlet interface 403.

[0041] Bag cleaning During the dust removal operation, control the first air inlet and the second air outlet interface 407 to be connected, and increase the power of the centrifugal fan 202 with adjustable flow rate. During the synchronous implementation of the dust removal operation, part of the cleaned airflow after dust removal passes through the area between the first air inlet and the second air outlet interface 407 of the controllable throttling component 4, then enters the reflux cleaning component 3 from the second air outlet interface 407, and then drives the vortex-induced vibration component 304 to vibrate to clean the bag of the bag dust collector main body 1. The airflow after driving the vortex-induced vibration component 304 to vibrate passes through the bag dust collector main body 1 and the air outlet pipe group 2 again during the dust removal process and enters the controllable throttling component 4.

[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bag dust removal device for mineral sample preparation, characterized in that: include: A bag filter body (1), wherein an air outlet pipe group (2) is arranged on a side of the bag filter body (1), and the air outlet pipe group (2) comprises: a pipe (201), and a centrifugal fan (202) with adjustable flow rate installed on the pipe (201); A controllable shutoff component (4), the controllable shutoff component (4) comprising a first air inlet, a first air outlet interface (403), and a second air outlet interface (407), the first air inlet being connected to the first air outlet interface (403), the first air inlet being controllably connected / disconnected to the second air outlet interface (407), and the first air inlet being connected to the air outlet end of the air outlet pipe assembly (2); A backflow cleaning component (3), the backflow cleaning component (3) comprising: a drainage pipe and a vortex-induced vibration component (304), the vortex-induced vibration component (304) being arranged inside the bag filter body (1), the first end of the drainage pipe being connected to the second air outlet interface (407), and the second end of the drainage pipe being connected to the vortex-induced vibration component (304).

2. The bag dust removal equipment for mineral sample preparation according to claim 1 is characterized in that: The bag filter body (1) comprises: A main shell (101), the top end of the main shell (101) is open, a guide portion (101a) is provided at the bottom of the main shell (101), a dust collection port (102) is fixedly provided at the bottom end of the guide portion (101a), and a gas inlet port (104) is fixedly provided on the side of the main shell (101); An upper cover (103), the upper cover (103) being fixedly mounted on the top of the main shell (101), and a gas exhaust port (105) being fixedly provided on the top of the upper cover (103); A cylindrical cloth bag (107), wherein a top mounting plate (106) is sealed and fixedly mounted on the inner side of the main shell (101) and close to the top opening of the main shell (101), the top mounting plate (106) is provided with mounting holes having the same number as the cylindrical cloth bag (107), and an annular member (107a) is fixedly mounted on the top of the cylindrical cloth bag (107), and the annular member (107a) is fixedly clamped on the inner side of the mounting hole; A bottom support plate (109), the bottom support plate (109) being mounted on the inner side of the main housing (101) via an elastic frame (1010), the bottom support plate (109) being provided with a dust collection hole, a metal head (108) corresponding to the cylindrical cloth bag (107) being fixedly mounted on the top of the bottom support plate (109), a flat-top cone head (108a) being disposed on the top of the metal head (108), and the bottom end of the cylindrical cloth bag (107) being fixedly mounted on the flat-top cone head (108a) via a screw; The vortex-induced vibration assembly (304) is installed at the bottom of the bottom support plate (109).

3. The bag dust removal equipment for mineral sample preparation according to claim 2 is characterized in that: The elastic frame (1010) comprises: a bottom frame (1010a), a top frame (1010b), and an elastic filling piece (1010c) located between the bottom frame (1010a) and the top frame (1010b), and one end of the bottom frame (1010a) is fixedly connected to one end of the top frame (1010b).

4. The bag dust removal equipment for mineral sample preparation according to claim 1 is characterized in that: The controllable shut-off component (4) comprises: An outer tube body (401), wherein a shrinkable joint (402) is provided at the bottom of the outer tube body (401), the bottom end of the shrinkable joint (402) is a first air inlet, the bottom end of the shrinkable joint (402) is connected to the air outlet end of the air outlet pipe group (2), and the first air outlet interface (403) is provided on the side of the outer tube body (401); A top plate (404), the top plate (404) being fixedly mounted on the inner side of the outer tube body (401), the top plate (404) being provided with a through hole, and a sealing ring (405) being fixedly mounted on the inner side of the through hole in a sealing manner; An inner tube body (408), the inner tube body (408) being located on the inner side of the outer tube body (401), the top end of the inner tube body (408) being fixedly connected to the top plate (404), the sealing ring (405) corresponding to the center of the inner tube body (408), the side surface of the inner tube body (408) being fixedly connected to the second gas outlet interface (407), the second gas outlet interface (407) penetrating the side wall of the outer tube body (401) and extending to the outside of the outer tube body (401); A truncated cone head (4011), wherein a matching seat (4010) is non-fixedly connected to the inner side of the inner tube body (408) and near the bottom end, a conical hole is provided at the center of the matching seat (4010), the truncated cone head (4011) is provided on the inner side of the conical hole, the truncated cone head (4011) is a shell member, and a side air hole (4011a) is provided on the conical side of the truncated cone head (4011), and a bottom air hole (4011b) is provided on the bottom surface of the truncated cone head (4011); An electrically driven telescopic member (406), the electrically driven telescopic member (406) being inverted and fixedly mounted on the top end of the outer tube body (401), the telescopic end of the electrically driven telescopic member (406) being located on the inner side of the outer tube body (401); A transmission rod (409) is slidably mounted on the inner side of the sealing ring (405), and the top end of the transmission rod (409) is fixedly mounted on the telescopic end of the electric drive telescopic member (406), and the bottom end of the transmission rod (409) is fixedly mounted on the top end of the truncated cone head (4011).

5. The bag dust removal equipment for mineral sample preparation according to claim 4 is characterized in that: The connection point between the first gas outlet interface (403) and the outer tube body (401) is located outside the inner tube body (408).

6. The bag dust removal equipment in mineral sample preparation according to claim 2, characterized in that: The drainage pipe comprises: a guide pipe portion (301), a header section (302), and a secondary branch pipe section (303) which are connected in sequence; the secondary branch pipe section (303) is fixedly connected to the main shell (101), and one end of the secondary branch pipe section (303) is located on the inner side of the main shell (101); and one end of the secondary branch pipe section (303) is connected to a vortex-induced vibration component (304).

7. The bag dust removal equipment for mineral sample preparation according to claim 6 is characterized in that: The auxiliary branch pipe sections (303) and the vortex-induced vibration components (304) are both provided in multiple groups.

8. The bag dust removal equipment for mineral sample preparation according to claim 6, characterized in that: The vortex-induced vibration component (304) comprises: A square tube channel (304a), wherein a vertically arranged guide hole (304b) is provided on a side surface of the square tube channel (304a); A sliding shaft (304), the sliding shaft (304) being slidably mounted on the inner side of the guide hole (304b), a cylindrical body (304d) being fixedly connected to the sliding shaft (304) and located on the inner side of the square tube channel (304a); A spring (304f), a side plate (304e) is fixedly installed on the outer side of the square tube channel (304a), one end of the spring (304f) is fixedly connected to the side plate (304e), and the other end of the spring (304f) is fixedly connected to the sliding shaft (304).

9. The bag dust removal equipment for mineral sample preparation according to claim 8, characterized in that: The guide holes (304b), the sliding shaft (304), the cylinder (304d), the spring (304f), and the side plate (304e) are arranged in multiple groups along the length direction of the square tube channel (304a).

10. A dust removal method, characterized in that: Using the bag dust removal equipment in mineral sample preparation according to any one of claims 1 to 9 specifically comprises the following steps: Dust removal work The first air inlet and the second air outlet interface (407) are controlled to be closed, and the centrifugal fan (202) with an adjustable flow rate of the air outlet pipe group (2) is operated to drive the airflow carrying dust to pass through the bag filter body (1), and the airflow carrying dust is removed in the bag filter body (1). The clean airflow after dust removal passes through the air outlet pipe group (2), the area between the first air inlet and the first air outlet interface (403) of the controllable interception component (4), and is discharged from the first air outlet interface (403); Bag cleaning During the dust removal operation, the first air inlet is controlled to be connected to the second air outlet (407), and the power of the centrifugal fan (202) with adjustable flow is increased. During the dust removal operation, part of the clean airflow after dust removal passes through the area between the first air inlet and the second air outlet (407) of the controllable interception component (4), and then enters the reflux cleaning component (3) from the second air outlet (407), and then drives the vortex-induced vibration component (304) to vibrate to clean the bags of the bag-type dust collector body (1). The airflow after the vortex-induced vibration component (304) is driven to vibrate passes through the bag-type dust collector body (1) and the air outlet pipe group (2) again during the dust removal operation and enters the controllable interception component (4).

Images