Spiral blanking degassing blowback device

Abstract

The utility model discloses a spiral blanking degassing blowback device, which belongs to the technical field of a bottom filling type degassing packaging machine, and the bottom filling type degassing packaging machine comprises a feeding barrel, a spiral feeding rod arranged in the feeding barrel and a mesh type filter arranged on the outer side of the spiral feeding rod in a surrounding manner, a vacuum cavity shell is arranged between the feeding barrel and the mesh type filter and is arranged on the outer side of the mesh type filter at intervals, so that a closed vacuum cavity is formed in the part in the vacuum cavity shell; the vacuum cavity is communicated with the back flushing mechanism, and the back flushing mechanism blows high-pressure gas into the vacuum cavity to clean blocked meshes on the mesh type filter. By arranging the vacuum cavity shell and the back flushing mechanism, back flushing is carried out on filter meshes in the bottom filling type degassing packaging machine so as to ensure that materials can be degassed smoothly.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery, and particularly relates to a spiral feeding degassing and backwashing device. Background Art

[0002] Bottom filling degassing packaging machines are widely used in the packaging sites of materials with fine particles that are prone to generate dust. A spiral feeding pipe is used for material transportation and extrusion from the bottom of the packaging machine. Since a lot of air will be generated inside the material during transportation, stirring, and spiral feeding, it is necessary to degas the material during filling. And in order to reduce dust during subsequent filling, a sintered filter element is wrapped outside the spiral feeding pipe for filtration. For example, in the prior art, a bottom filling degassing pipe disclosed in a Chinese utility model patent with the publication number CN207725722U and the publication date of August 14, 2018, the outer pipe is connected by a degassing section at the upper part, a filtering section in the middle, and an air extraction section at the lower part. Among them, degassing ports are arranged on the outer wall of the upper part of the degassing section, and the degassing ports are connected to a vacuum source. An inner pipe lower flange is arranged at the bottom of the degassing section, and a feeding inner pipe is arranged inside the degassing section; a filter mesh pipe is arranged inside the filtering section; a filter mesh top cylinder is arranged inside the air extraction section, and a welding screw sleeve is arranged at the bottom of the air extraction section, and an air extraction port is arranged inside the welding screw sleeve; a filter mesh upper flange is arranged on the top surface of the filter mesh pipe, a filter mesh lower flange is arranged on the bottom surface of the filter mesh pipe, and a reinforcing flange is arranged on the outer cylindrical surface in the middle of the filter mesh pipe.

[0003] However, since the sintered filter element will be blocked after working for a period of time, the degassing effect of the material is not ideal, and there is still too much air in the packaging bag after sealing, resulting in the situation of stack collapse during palletizing and transportation. Content of the Utility Model

[0004] The utility model aims to solve the problem that the sintered filter element is blocked in the prior art, resulting in an unsatisfactory degassing effect and causing stack collapse during subsequent palletizing of the packaging bag, and proposes a spiral feeding degassing and backwashing device. The device regularly cleans the mesh filter in the degassing device through the setting of a vacuum chamber and a backwashing mechanism to ensure the smooth degassing of the material.

[0005] In order to achieve the above utility model purpose, the technical solution of the utility model is as follows:

[0006] A spiral feeding degassing and backwashing device includes a feeding cylinder, a spiral feeding rod arranged inside the feeding cylinder, and a mesh filter. The mesh filter surrounds the outside of the spiral feeding rod. It is characterized in that a vacuum chamber housing is arranged at intervals outside the mesh filter. The vacuum chamber housing is located between the feeding cylinder and the mesh filter, and the part inside the vacuum chamber housing forms a closed vacuum chamber; the vacuum chamber is communicated with a backwashing mechanism, and high-pressure gas is blown into the vacuum chamber by the backwashing mechanism to clean the blocked mesh holes on the mesh filter.

[0007] Further, a quick-connect flange is provided outside the upper end of the vacuum chamber housing. A countersunk hole is provided in a circle on the flange surface of the quick-connect flange and is fixedly connected to the mesh filter.

[0008] Further, a positioning step is provided at the lower end of the quick-connect flange. The positioning step positions the vacuum chamber housing, the mesh filter, and the feeding cylinder and closes their openings.

[0009] Further, a positioning and sealing base is provided at the lower end of the vacuum chamber housing. One end of the positioning and sealing base closes the bottom openings of the vacuum chamber housing and the feeding cylinder, and the other end is provided with a thread for installing a cut-off valve.

[0010] Further, the backflush mechanism includes a blow pipe, a gas storage tank, and a control valve.

[0011] Further, one end of the blow pipe is communicated with the outlet of the gas storage tank, and the other end is communicated with the inside of the vacuum chamber; the control valve is provided at the outlet of the gas storage tank and is used to control the opening or closing of the gas storage tank.

[0012] Further, the blow pipe is connected to the side wall of the quick-connect flange. A hole communicating with the inside of the vacuum chamber is provided on the quick-connect flange, and the outlet end of the blow pipe is communicated with the hole.

[0013] Further, the control valve is a one-way valve.

[0014] The working principle of the present utility model is as follows:

[0015] In this device, the gas storage tank of the backflush mechanism stores high-pressure gas, which has a large pressure at the moment of release. When it is necessary to clean the mesh filter, the control valve is opened, and the high-pressure gas in the gas storage tank instantly occupies the inside of the vacuum chamber through the blow pipe. Since only the mesh holes of the filter can allow air to pass through in the vacuum chamber, the high-pressure gas is squeezed into the fine holes on the filter, achieving the effect of backflushing and cleaning the filter.

[0016] In summary, the present utility model has the following advantages:

[0017] The present utility model backflushes the mesh holes of the filter inside the bottom filling type degassing packaging machine through the provided backflush cleaning device, preventing the blockage of the filter mesh holes from affecting the material degassing effect, ensuring that the air content in the packaging bag can meet the standard, and improving the stability of the packaged material during subsequent palletizing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall structure diagram of the present utility model;

[0019] Figure 2 is the front view of the present utility model;

[0020] Figure 3 This is the top view of the present utility model;

[0021] Figure 4 is Figure 3 the sectional view taken along the C-C direction of

[0022] Figure 5 is Figure 3 the sectional view taken along the B-B direction of

[0023] In the figure:

[0024] 1. Feeding cylinder, 2. Mesh filter, 3. Vacuum chamber, 4. Vacuum chamber housing, 5. Blowing pipe, 6. Control valve, 7. Air storage tank, 8. Screw feeding rod, 9. Positioning step, 10. Quick-connect flange, 11. Positioning and sealing base. Specific embodiments

[0025] It should be noted that the described embodiments are only part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0026] It should also be noted here that in the description of the present utility model, the orientation or positional relationship indicated by terms such as "front", "back", "horizontal", "vertical", "up", "down", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0027] Existing bottom-filling degassing packaging machines generally include a screw feeding cylinder 1, a screw feeding rod 8 and a mesh filter 2 arranged inside the screw feeding cylinder 1. The mesh filter 2 is wrapped around the screw feeding rod 8, and the degassing mechanism is communicated with the inside of the screw feeding cylinder 1 to degas the materials inside the vacuum chamber. During the feeding process, the mesh filter 2 can be used to filter the dust generated by the materials and at the same time facilitate the degassing mechanism to perform degassing treatment on the materials. The mesh filter in this solution refers to a sintered filter element. Aiming at the problem that the mesh filter 2 is prone to blockage after running for a period of time, resulting in poor degassing and packaging effects, the present utility model provides a screw feeding degassing and backwashing device, which blows back the mesh filter 2 through the setting of a vacuum chamber 3 and a backwashing mechanism to clean the mesh holes.

[0028] Embodiment 1

[0029] This embodiment provides a screw feeding degassing and backwashing device, as shown in Figures 1 to 5As shown in the figure, a vacuum chamber housing 4 is provided between the spiral feeding cylinder 1 and the mesh filter 2. The vacuum chamber housing 4 is arranged outside the mesh filter 2, and a gap is left between the inner wall of the vacuum chamber housing 4 and the outer wall of the mesh filter 2. The part inside the vacuum chamber housing 4 forms a closed vacuum chamber 3. The inside of the vacuum chamber 3 is connected to the backflush mechanism and the degassing mechanism. The degassing mechanism degasses the materials inside the vacuum chamber, and the backflush mechanism blows high-pressure gas into the vacuum chamber 3 to clean the blocked filter holes on the mesh filter 2.

[0030] In this solution, a backflush cleaning device is set to backflush the filter holes inside the bottom filling degassing packaging machine, preventing the blockage of the filter holes from affecting the degassing effect of the materials, ensuring that the air content in the packaging bag can meet the standard, and improving the stability of the packaged materials during subsequent palletizing.

[0031] Embodiment 2

[0032] This embodiment provides a spiral feeding degassing and backflush device, including a vacuum chamber housing 4 arranged between the spiral feeding cylinder 1 and the mesh filter 2. The vacuum chamber housing 4 is spaced outside the mesh filter 2, so that the part inside the vacuum chamber housing 4 forms a closed vacuum chamber 3. The inside of the vacuum chamber 3 is connected to the backflush mechanism and the degassing mechanism. The degassing mechanism degasses the materials inside the vacuum chamber, and the backflush mechanism blows high-pressure gas into the vacuum chamber 3 to clean the blocked filter holes on the mesh filter 2.

[0033] In this embodiment, a quick-connect flange 10 is provided outside the upper end of the vacuum chamber housing 4, and its flange surface is fixedly connected to the mesh filter 2 through countersunk holes arranged in a circle. A positioning step 9 is provided at the lower end of the quick-connect flange 10, and the positioning step positions the vacuum chamber housing 4, the mesh filter 2 and the feeding cylinder 1 and closes their openings. A positioning and sealing base 11 is also provided at the lower end of the vacuum chamber housing 4. One end of the positioning and sealing base 11 closes the bottom openings of the vacuum chamber housing 4 and the spiral feeding cylinder 1, and the other end is provided with threads for installing a cut-off valve.

[0034] Embodiment 3

[0035] This embodiment provides a spiral feeding degassing and backflush device, including a vacuum chamber housing 4 arranged between the spiral feeding cylinder 1 and the mesh filter 2. The vacuum chamber housing 4 is spaced outside the mesh filter 2, so that the part inside the vacuum chamber housing 4 forms a closed vacuum chamber 3. The inside of the vacuum chamber 3 is connected to the backflush mechanism and the degassing mechanism. The degassing mechanism degasses the materials inside the vacuum chamber, and the backflush mechanism blows high-pressure gas into the vacuum chamber 3 to clean the blocked filter holes on the mesh filter 2.

[0036] In this embodiment, a quick-connect flange 10 is provided outside the upper end of the vacuum chamber housing 4, and the flange surface is fixedly connected to the mesh filter 2 by countersunk holes arranged in a circle. A positioning step 9 is provided at the lower end of the quick-connect flange 10, and the positioning step positions the vacuum chamber housing 4, the mesh filter 2, and the feeding cylinder 1 and closes the opening.

[0037] A positioning and sealing base 11 is further provided at the lower end of the vacuum chamber housing 4. One end of the positioning and sealing base 11 closes the bottom openings of the vacuum chamber housing 4 and the screw feeding cylinder 1, and the other end is provided with threads for installing a cut-off valve.

[0038] Furthermore, in this embodiment, the backflush mechanism includes a blowpipe 5, a gas storage tank 7, and a control valve 6. High-pressure gas is stored in the gas storage tank 7. One end of the blowpipe 5 is connected to the outlet of the gas storage tank 7, and the other end is connected to the inside of the vacuum chamber 3; the control valve 6 is provided at the outlet of the gas storage tank 7 and is used to open or close the gas storage tank 7. In this embodiment, the blowpipe 5 in the backflush mechanism is connected to the side wall of the quick-connect flange 10, and the quick-connect flange 10 is provided with a hole communicating with the inside of the vacuum chamber 3, and the air outlet end of the blowpipe 5 is communicated with this hole.

[0039] Preferably, the control valve 6 is a one-way valve.

[0040] The working principle of the present utility model is as follows:

[0041] The gas storage tank 7 stores high-pressure gas, which has a large pressure at the moment of release. When it is necessary to clean the sintered filter element, the control valve 6 is opened, and the high-pressure gas in the gas storage tank 7 instantaneously occupies the inside of the vacuum chamber 3 through the blowpipe 5. Since only the mesh part of the filter in the vacuum chamber 3 can allow air to pass through, the high-pressure gas is squeezed into the fine holes on the filter, achieving the effect of backflushing the filter.

[0042] The above is only a preferred embodiment of the present utility model, and does not impose any form of limitation on the present utility model. Any simple modification or equivalent change made to the above embodiments based on the technical essence of the present utility model falls within the protection scope of the present utility model.

Claims

1. A spiral feeding degassing back-blowing device, comprising a feeding barrel (1), a spiral feeding rod (8) and a mesh filter (2) arranged in the feeding barrel (1), wherein the mesh filter (2) is arranged outside the spiral feeding rod (8), characterized in that: A vacuum chamber shell (4) is arranged at an interval on the outer side of the mesh filter (2); the vacuum chamber shell (4) is located between the feeding cylinder (1) and the mesh filter (2); the portion inside the vacuum chamber shell (4) forms a closed vacuum chamber (3); the vacuum chamber (3) is connected to a back-blowing mechanism, and the back-blowing mechanism blows high-pressure gas into the vacuum chamber (3) to clean the blocked mesh holes on the mesh filter (2).

2. A spiral feeding degassing back-flushing device according to claim 1, characterized in that: A quick-connect flange (10) is provided on the outside of the upper end of the vacuum chamber housing (4); countersunk holes are provided around the flange surface of the quick-connect flange (10) for fixed connection with the mesh filter (2).

3. A spiral material feeding degassing back-flushing device according to claim 2, characterized in that: A positioning step (9) is provided at the lower end of the quick-connect flange (10), and the positioning step (9) positions the vacuum chamber housing (4), the mesh filter (2) and the feed cylinder (1) and closes their openings.

4. The spiral material feeding degassing back-flushing device according to claim 1 is characterized in that: A positioning sealing base (11) is provided at the lower end of the vacuum chamber housing (4); one end of the positioning sealing base (11) closes the bottom openings of the vacuum chamber housing (4) and the feeding cylinder (1); and the other end is provided with a thread for mounting a cut-off valve.

5. The spiral material feeding degassing back-flushing device according to claim 2 is characterized in that: The back-blowing mechanism comprises an air blowing pipe (5), an air storage tank (7) and a control valve (6).

6. The spiral material feeding degassing and back-flushing device according to claim 5 is characterized in that: One end of the air blowing pipe (5) is in communication with the outlet of the air storage tank (7), and the other end is in communication with the interior of the vacuum chamber (3); the control valve (6) is arranged at the outlet of the air storage tank (7) and is used to control the opening or closing of the air storage tank (7).

7. The spiral material feeding degassing and back-flushing device according to claim 6 is characterized in that: The air blowing pipe (5) is connected to the side wall of the quick-connect flange (10); a hole communicating with the interior of the vacuum chamber (3) is provided on the quick-connect flange (10); and an air outlet end of the air blowing pipe (5) is communicated with the hole.

8. The spiral material feeding degassing and back-flushing device according to claim 5 is characterized in that: The control valve (6) is a one-way valve.

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