A negative pressure weighing hood that is easy to clean

Abstract

This utility model relates to the field of negative pressure weighing hood technology, specifically a negative pressure weighing hood that is easy to clean. It includes a weighing hood body, a three-way pipe, and a receiving box. A filter mechanism is detachably installed inside the filter housing on the weighing hood body. One top end of the three-way pipe is connected to the input end of a first negative pressure fan inside the filter housing, and the other top end of the three-way pipe is connected to a second negative pressure fan. The receiving box is slidably connected to the bottom of the filter housing inside the weighing hood body. This utility model facilitates the disassembly and assembly of the filter mechanism through the mounting base. The connection pipe, three-way pipe, solenoid valve, and second negative pressure fan facilitate reverse cleaning of the filter mechanism, reducing the frequency of disassembly and cleaning. The cleaning mechanism facilitates the shaking and removal of dust from the dust collector bag, effectively cleaning the dust and further reducing the frequency of disassembly and cleaning the filter mechanism, thus providing convenience for use.

Description

Technical Field

[0001] This utility model relates to the field of negative pressure weighing hood technology, specifically a negative pressure weighing hood that is easy to clean. Background Technology

[0002] A negative pressure weighing hood is a highly efficient and accurate device specifically designed for weighing powdery materials. It mainly consists of a sealed container and a negative pressure system. The negative pressure system extracts air from the container to create a negative pressure state, causing the powdery material to flow downwards under the influence of gravity, facilitating weighing.

[0003] Chinese Patent No. CN222104873U discloses an easy-to-clean negative pressure weighing hood, including an outer cover structure. This utility model's easy-to-clean negative pressure weighing hood significantly reduces the frequency of cleaning the main filter element, saving manpower. Furthermore, the designed lighting structure utilizes the circulating air characteristic of the negative pressure weighing hood to provide better heat dissipation for LED lights, extending their lifespan and maximizing the overall effectiveness of the negative pressure weighing hood.

[0004] However, the above-mentioned publicly available solutions have the following shortcomings: After a period of use, the dust collector bag of the easy-to-remove filter structure will be clogged with dust. It is necessary to disassemble the easy-to-remove filter structure regularly to clean the dust collector bag, so as to avoid interfering with the normal use of the main filter element, which brings inconvenience to use and reduces work efficiency. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing a negative pressure weighing hood that is easy to clean.

[0006] The technical solution of this utility model is as follows: A negative pressure weighing hood that is easy to clean includes a weighing hood body, a filter box on which a filter mechanism is detachably installed. The filter mechanism consists of a socket, two sets of sealing frames, and a limiting frame adsorbed at the bottom of the socket. The socket is detachably installed in the weighing hood body. The two sets of sealing frames abut against the socket through the limiting frame. Multiple sets of openings are evenly arranged on the socket, sealing frames, and limiting frame. A main filter element and a dust collector bag are respectively arranged on the two sets of sealing frames, with the dust collector bag corresponding to the opening. A three-way pipe is connected to the top of the filter mechanism. One end of the top of the three-way pipe is connected to the input end of a first negative pressure fan inside the filter box, and the other end of the top of the three-way pipe is connected to a second negative pressure fan. Solenoid valves are arranged at both ends of the top of the three-way pipe. The input end of the second negative pressure fan extends to the outside of the weighing hood body. A receiving box is slidably connected to the bottom of the filter box inside the weighing hood body and is located below the filter mechanism.

[0007] Preferably, the filter box on the weighing hood body is equipped with an installation base, and multiple sets of connecting covers are evenly connected on the installation base. The connecting covers are set to correspond to the ports, and connecting pipes are connected between the multiple sets of connecting covers. The bottom end of the tee pipe is connected to the connecting pipe.

[0008] Preferably, the mounting base has two sets of slots symmetrically provided, and the socket is inserted into the two sets of slots.

[0009] Preferably, a magnet is embedded at the bottom of the socket, and an iron block is embedded at the top of the limiting frame.

[0010] Preferably, the filter box on the weighing hood body is further provided with a cleaning mechanism. The cleaning mechanism includes a drive component, which is provided on the weighing hood body; and multiple sets of connecting rods. The multiple sets of connecting rods are driven by the drive component to reciprocate and adjust along the horizontal direction inside the filter box on the weighing hood body. One end of the connecting rod is connected to the drive component, and the other end of the connecting rod is equipped with a clamp, which clamps the bottom end of the dust collector bag.

[0011] Preferably, the driving component includes an incomplete gear, which is driven to rotate by a motor mounted on the outer wall of the weighing hood body; a slide plate, which is slidably connected to the weighing hood body, the slide plate being L-shaped, one end of the slide plate being fitted with an elastic element, the other end of the elastic element being connected to the weighing hood body, and the other end of the slide plate extending into the interior of the filter box on the weighing hood body and connected to multiple sets of connecting rods; and a rack, which is mounted on the slide plate, and the slide plate is intermittently meshed with the incomplete gear.

[0012] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects: the installation base facilitates the disassembly and assembly of the filter mechanism, and the connection pipe, three-way pipe, solenoid valve and second negative pressure fan facilitate reverse cleaning of the filter mechanism, reducing the frequency of disassembly and cleaning of the filter mechanism; the cleaning mechanism facilitates the shaking and removal of dust from the dust collector bag, achieving the effect of cleaning dust, further reducing the frequency of disassembly and cleaning of the filter mechanism, making cleaning easier and providing convenience for use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a front view of the connection between the filter mechanism and the mounting base of this utility model;

[0015] Figure 3 This is a perspective view of the connection between the filter mechanism and the mounting base of this utility model;

[0016] Figure 4 This is a schematic diagram of the filter mechanism structure of this utility model;

[0017] Figure 5 This is a schematic diagram of the cleaning mechanism structure of this utility model.

[0018] Reference numerals in the attached drawings: 1. Weighing hood body; 2. Mounting base; 201. Connecting cover; 202. Connecting pipe; 203. T-pipe; 204. Solenoid valve; 205. Second negative pressure fan; 3. Socket; 301. Through port; 302. Sealing frame; 303. Dust collector bag; 304. Limiting frame; 4. Incomplete gear; 401. Slide plate; 402. Rack; 403. Elastic element; 404. Connecting rod; 405. Clamp; 5. Receiving box. Detailed Implementation

[0019] Example 1

[0020] like Figures 1 to 4 As shown, this utility model proposes a negative pressure weighing hood that is easy to clean, including a weighing hood body 1, a three-way pipe 203, and a receiving box 5. A filter mechanism is detachably installed inside the filter box on the weighing hood body 1. The filter mechanism consists of a socket 3, two sets of sealing frames 302, and a limiting frame 304 adsorbed at the bottom of the socket 3. The socket 3 is detachably installed in the weighing hood body 1. The two sets of sealing frames 302 abut against the socket 3 through the limiting frame 304. A sealing gasket is provided at the abutting end of the sealing frame 302. Multiple sets of openings 301 are evenly arranged on the socket 3, the sealing frames 302, and the limiting frame 304. A main filter element and a dust collector bag 303 are respectively provided on the two sets of sealing frames 302. The weighing hood body 1 and the main filter element are existing technologies; the specific structure is described in the patent application. The patent with publication number CN222104873U describes this in detail, so it will not be repeated here. The dust collector bag 303 is set to correspond with the port 301; the three-way pipe 203 is connected to the top of the filter mechanism, one end of the top of the three-way pipe 203 is connected to the input end of the first negative pressure fan inside the filter box, and the other end of the top of the three-way pipe 203 is connected to the second negative pressure fan 205. Solenoid valves 204 are set at both ends of the top of the three-way pipe 203. The input end of the second negative pressure fan 205 extends to the outside of the weighing hood body 1. A filter screen is installed at the input end of the second negative pressure fan 205 to prevent external impurities from being sucked into the weighing hood body 1; the receiving box 5 is slidably connected to the bottom of the filter box inside the weighing hood body 1 and is set below the filter mechanism.

[0021] Furthermore, an installation base 2 is installed inside the filter box on the weighing hood body 1. Multiple sets of connecting covers 201 are evenly connected on the installation base 2. The connecting covers 201 are correspondingly set with the ports 301. Connecting pipes 202 are connected between the multiple sets of connecting covers 201. The bottom end of the three-way pipe 203 is connected to the connecting pipe 202.

[0022] Furthermore, the mounting base 2 has two sets of slots symmetrically arranged, and the socket 3 is inserted into the two sets of slots. A sealing gasket is provided at the connection between the slot and the socket 3.

[0023] Furthermore, a magnet is embedded at the bottom of the socket 3, and an iron block is embedded at the top of the limiting frame 304, so that the limiting frame 304 and the socket 3 can be attracted to each other.

[0024] In this embodiment, the main filter element and the dust collector bag 303 are fitted together so that the two sets of sealing frames 302 abut against each other. Then, the sealing frames 302 are abutted against the bottom of the socket 3. Next, the opening 301 on the limiting frame 304 is passed through the dust collector bag 303 until the limiting frame 304 is attracted to the socket 3. At this time, the two sets of sealing frames 302 are installed on the socket 3 through the limiting frame 304. The installation and removal are convenient and quick. The socket 3 is slid into the two sets of slots on the mounting base 2. The sealing door is closed. The first negative pressure fan is started by the controller to start filtering the gas through the filtration mechanism. The specific working principle is described in detail in the patent with authorization announcement number CN222104873U. The process is detailed below. After the main filter element and dust collector bag 303 have been used for a period of time, the controller closes the valve port of the solenoid valve 204 corresponding to the first negative pressure fan on the three-way pipe 203, while opening the valve port of another set of solenoid valves 204. The second negative pressure fan 205 is started to filter the external air and introduce it into the three-way pipe 203. Then, it is diverted to multiple sets of connecting covers 201 through the connecting pipe 202, and then quickly blows out onto multiple sets of main filter elements and dust collector bags 303. This can blow some of the dust particles attached to the main filter element and dust collector bag 303 into the receiving box 5, which plays a role in reverse cleaning, reduces the frequency of disassembly and cleaning of the cleaning mechanism, and provides convenience for use.

[0025] Example 2

[0026] like Figure 1 , Figure 2 and Figure 5 As shown, the present invention proposes a negative pressure weighing hood that is easy to clean. Compared with Embodiment 1, the filter box on the weighing hood body 1 is also provided with a cleaning mechanism. The cleaning mechanism includes a drive component and a connecting rod 404. The drive component is set on the weighing hood body 1. Multiple sets of connecting rods 404 are provided. The multiple sets of connecting rods 404 are driven by the drive component to reciprocate and adjust along the horizontal direction inside the filter box on the weighing hood body 1. One end of the connecting rod 404 is connected to the drive component, and the other end of the connecting rod 404 is equipped with a clamp 405. The clamp 405 clamps the bottom end of the dust collector bag 303. The clamp 405 is prior art and is convenient for adjusting and clamping and disassembling the bottom end of the dust collector bag 303.

[0027] Furthermore, the driving components include an incomplete gear 4, a sliding plate 401, and a rack 402; the incomplete gear 4 is driven to rotate by a motor installed on the outer wall of the weighing hood body 1. The incomplete gear 4 and the motor are equipped with a housing, which is not shown and is existing technology, used for protection; the sliding plate 401 is slidably connected to the weighing hood body 1, and the sliding plate 401 is L-shaped. One end of the sliding plate 401 is equipped with an elastic element 403, which is a spring. The other end of the elastic element 403 is connected to the weighing hood body 1, and the other end of the sliding plate 401 extends into the filter box on the weighing hood body 1 and is connected to multiple sets of connecting rods 404; the rack 402 is installed on the sliding plate 401, and the sliding plate 401 is intermittently meshed with the incomplete gear 4.

[0028] In this embodiment, since the dust collector bag 303 intercepts and adheres to a large number of dust particles, the clamp 405 is adjusted during the filtration process to clamp the bottom of the dust collector bag 303. After a period of use, the controller starts the motor to drive the incomplete gear 4 to rotate. The incomplete gear 4 intermittently meshes with the rack 402. At the same time, under the elastic recovery action of the elastic element 403, the slide plate 401 slides back and forth along the horizontal direction of the weighing cover body 1, thereby driving multiple sets of connecting rods 404 to reciprocate horizontally. This, in turn, causes multiple sets of clamps 405 to shake multiple sets of dust collector bags 303, shaking off large dust particles adhering to the outside of the dust collector bag 303 into the receiving box 5 for collection. This further automatically cleans the dust collector bag 303, reducing the frequency of cleaning the disassembly and cleaning mechanism.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A negative pressure weighing hood that facilitates cleaning, characterized in that, include The weighing hood body (1) has a filter mechanism that can be detachably installed inside the filter box. The filter mechanism consists of a socket (3), two sets of sealing frames (302) and a limiting frame (304) adsorbed at the bottom of the socket (3). The socket (3) can be detachably installed in the weighing hood body (1). The two sets of sealing frames (302) abut against the socket (3) through the limiting frame (304). Multiple sets of openings (301) are evenly arranged on the socket (3), sealing frames (302) and limiting frame (304). The two sets of sealing frames (302) are respectively provided with a main filter element and a dust collector bag (303). The dust collector bag (303) is correspondingly arranged with the opening (301). A three-way pipe (203) is connected to the top of the filter mechanism. One end of the top of the three-way pipe (203) is connected to the input end of the first negative pressure fan inside the filter box. The other end of the top of the three-way pipe (203) is connected to a second negative pressure fan (205). Solenoid valves (204) are provided at both ends of the top of the three-way pipe (203). The input end of the second negative pressure fan (205) extends to the outside of the weighing hood body (1). And the receiving box (5), which is slidably connected to the bottom of the filter box on the weighing cover body (1), and the receiving box (5) is located below the filter mechanism.

2. The negative pressure weighing hood for easy cleaning according to claim 1, characterized in that The filter box on the weighing hood body (1) is equipped with a mounting base (2). Multiple sets of connecting covers (201) are evenly connected on the mounting base (2). The connecting covers (201) are correspondingly set with the ports (301). Connecting pipes (202) are connected between the multiple sets of connecting covers (201). The bottom end of the three-way pipe (203) is connected to the connecting pipe (202).

3. A negative pressure weighing hood for easy cleaning according to claim 2, characterized in that The mounting base (2) has two sets of slots symmetrically arranged, and the socket (3) is inserted into the two sets of slots.

4. The negative pressure weighing hood for easy cleaning according to claim 1, characterized in that, A magnet is embedded at the bottom of the socket (3), and an iron block is embedded at the top of the limiting frame (304).

5. The negative pressure weighing hood for easy cleaning according to claim 1, characterized in that, The filter box on the weighing hood body (1) is also equipped with a cleaning mechanism, which includes... A drive component is mounted on the weighing hood body (1); And connecting rods (404), which are provided in multiple sets. The multiple sets of connecting rods (404) are driven by the driving component to reciprocate and adjust along the inside of the filter box on the weighing hood body (1) in the horizontal direction. One end of the connecting rod (404) is connected to the driving component, and the other end of the connecting rod (404) is equipped with a clamp (405). The clamp (405) is clamped to the bottom end of the dust collector bag (303).

6. A negative pressure weighing hood for easy cleaning according to claim 5, characterized in that Drive components include The incomplete gear (4) is driven to rotate by a motor installed on the outer wall of the weighing hood body (1); The slide plate (401) is slidably connected to the weighing hood body (1). The slide plate (401) is L-shaped. One end of the slide plate (401) is equipped with an elastic element (403). The other end of the elastic element (403) is connected to the weighing hood body (1). The other end of the slide plate (401) extends into the filter box on the weighing hood body (1) and is connected to multiple sets of connecting rods (404). And a rack (402), which is mounted on a slide plate (401), which is intermittently engaged with an incomplete gear (4).

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