Vacuum-pumping forced feeder and working method thereof

Abstract

The vacuumizing forced feeder comprises a feeding bin, a spiral shaft, a shaft drive and a cheek plate assembly, the feeding bin comprises a top cover and a conical shell, the conical shell is provided with a plurality of upper-section vacuumizing filter plates, a plurality of lower-section vacuumizing filter plates and mounting supporting legs, and the top cover is provided with a driving base, a stuffing box, a center hole and a feeding opening; a cheek plate mounting plate is arranged at the bottom of the conical shell; an external thread, a round nut, a material cleaning scraper and a detachable spiral section are arranged on the spiral shaft, the spiral shaft penetrates through the stuffing box, and the stuffing box penetrates through the center hole to be installed on the top cover; the shaft drive is mounted on a top cover of the feeding bin and connected with the spiral shaft through a flat key, and axial positioning of the spiral shaft is achieved through an external thread and a round nut; the cheek plate assembly comprises a movable wear-resisting plate and an elastic propelling device, and the elastic propelling device is installed below the cheek plate installation plate. According to the invention, loss caused by fragmentation of product blocks can be reduced, the product quality is improved, the yield is increased, and energy consumption and equipment noise can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of roll forming, and in particular relates to a vacuum forced feeder and a working method thereof. Background Art

[0002] The existing forced feeder has a screw shaft and a feeding bin that accommodates the screw shaft. When the screw shaft rotates, the material in the feeding bin is pushed by the screw shaft to the rolling area between the double rollers below, and finally rolled into a product agglomerate. Due to the pores between and inside the material particles, part of the air inside the pores is wrapped in the product agglomerate during rolling and maintains high pressure for a certain period of time; when the product agglomerate separates from the double rollers, the external pressure disappears, and the high-pressure gas wrapped inside is released from the weak position of the product agglomerate, causing the product agglomerate to crack or break, seriously affecting the product quality and output. When the gas in the product agglomerate is released rapidly, it is usually accompanied by a loud blasting noise, which further affects the stable operation of the equipment. Summary of the invention

[0003] In order to solve the defects and shortcomings in the above-mentioned prior art, the present invention provides a vacuum forced feeder and a working method thereof which can reduce the loss caused by the breakage of product agglomerates, improve product quality, increase the yield rate, and reduce energy consumption and equipment noise.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a vacuum forced feeder, comprising a feeding bin, a spiral shaft, a shaft drive and a cheek plate assembly, the feeding bin comprising a top cover and a conical shell, the conical shell being provided with a plurality of upper vacuum filter plates, a lower vacuum filter plates and mounting legs, the top cover being provided with a driving seat, a stuffing box, a center hole and a feed port; a cheek plate mounting plate being provided at the bottom of the conical shell; the spiral shaft being provided with an external thread, a round nut, a cleaning scraper and a detachable spiral section, the spiral shaft passing through the stuffing box, the stuffing box passing through the center hole and being mounted on the top cover by a bolt pair; the shaft drive being mounted on the top cover of the feeding bin by a driving seat, being connected to the spiral shaft by a flat key, and realizing axial positioning of the spiral shaft by an external thread and a round nut; the cheek plate assembly comprising a movable wear-resistant plate and an elastic propulsion device, the elastic propulsion device being mounted below the cheek plate mounting plate by a bolt pair.

[0005] Preferably, the external thread and the round nut can axially lift or lower the screw shaft, thereby adjusting the gap between the screw shaft and the inner wall of the conical shell to eliminate the gap change caused by machining and assembly errors and wear, and achieve good positioning of the screw shaft.

[0006] Preferably, the cleaning scraper rotates with the spiral shaft in the feeding bin to prevent the material from staying in the upper middle section of the feeding bin.

[0007] Preferably, the movable wear-resistant plate is pushed by an elastic propulsion device and is always in close contact with the double rollers to ensure good sealing of the rolling area and avoid material leakage and pressure loss.

[0008] Preferably, the upper vacuum filter plate and the lower vacuum filter plate are powder sintered microporous filter plates.

[0009] Preferably, several upper vacuum filter plates are connected to the upper vacuum manifold through hoses, and several lower vacuum filter plates are connected to the lower vacuum manifold through hoses. The upper vacuum manifold and the lower vacuum manifold are respectively connected to the vacuum pump, which can simplify the pipeline and optimize the vacuum effect.

[0010] Preferably, the upper vacuum manifold and the lower vacuum manifold are respectively connected to arch breakers, and compressed air is intermittently sprayed into the vacuuming process to achieve automatic reverse clearing of the vacuum filter plate.

[0011] Preferably, the lower shell section of the conical shell can be disassembled independently so as to replace the detachable spiral section separately.

[0012] Preferably, the stuffing box has a lubricating oil circuit and can be connected to an automatic grease injection system.

[0013] A working method of a vacuum forced feeder comprises the following steps: powdery or particulate material enters a feeding bin through a feed inlet, part of the air is extracted through an upper vacuum filter plate, when the material is pre-compressed by a rotating spiral section, the air between the material particles is further extracted through a lower vacuum filter plate; the material with reduced air content is finally pressed into a rolling area between double rollers and squeezed into a product mass by the double rollers.

[0014] The vacuum forced feeder of the present invention can effectively squeeze powdered or particulate materials into product agglomerates with greatly reduced air volume, fundamentally solving the problem of gas explosion when the product agglomerates separate from the double rollers, thereby avoiding cracking and breaking of the product agglomerates, reducing product losses, improving product quality and output, and reducing energy consumption and equipment noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the appearance of Example 1 of the present invention;

[0016] Figure 2 is an internal cross-sectional view of Embodiment 1 of the present invention;

[0017] Figure 3 This is a schematic diagram of the appearance of the feeding bin in Example 1 of the present invention;

[0018] Figure 4 Schematic diagram of the appearance of the spiral shaft in Example 1 of the present invention;

[0019] In the figure: 101 feed bin, 102 lower vacuum manifold, 103 stuffing box, 104 shaft drive, 105 upper vacuum filter plate, 106 upper vacuum manifold, 107 mounting legs, 108 double rollers, 109 cheek plate mounting plate, 110 movable wear-resistant plate, 111 elastic propulsion device, 112 cheek plate assembly;

[0020] 201 conical shell, 202 top cover, 203 lubricating oil circuit, 204 spiral shaft, 205 cleaning scraper, 206 lower vacuum filter plate, 207 detachable spiral section, 208 rolling area;

[0021] 301 lower shell, 302 feed port, 303 drive seat, 304 center hole;

[0022] 401 round nut, 402 flat key, 403 external thread. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1

[0025] A preferred embodiment of a vacuum forced feeder includes a feed bin 101, a screw shaft 204, a shaft drive 104, and a cheek plate assembly 112. The feed bin 101 has a top cover 202 and a conical shell 201, the conical shell 201 has a plurality of upper vacuum filter plates 105, a lower vacuum filter plate 206, and mounting legs 107, the top cover 202 has a drive seat 303, a center hole 304, and a feed port 302; the bottom of the conical shell 201 has a cheek plate mounting plate 109; the screw shaft 204 has an external thread 403, a round nut 401, a stuffing box 103, a cleaning scraper 205, and a detachable screw segment 207, the screw The swivel 204 passes through the stuffing box 103, and the stuffing box 103 passes through the center hole 304 and is installed on the top cover 202 through a bolt pair; the shaft drive 104 is installed on the feed bin top cover 202 through a drive seat 303, connected to the screw shaft 204 through a flat key 402, and the axial positioning of the screw shaft 204 is achieved through an external thread 403 and a round nut 401; the cheek plate assembly 112 has a movable wear-resistant plate 110 and an elastic propulsion device 111, and is installed below the cheek plate mounting plate 109 through a bolt pair.

[0026] The external thread 403 and the round nut 401 can axially lift or lower the screw shaft 204, thereby adjusting the gap between the screw shaft 204 and the inner wall of the conical shell 201 to eliminate the gap change caused by machining and assembly errors and wear, and achieve good positioning of the screw shaft 204. The cleaning scraper 205 rotates with the screw shaft in the feeding bin 101 to prevent the material from staying in the upper middle section of the feeding bin 101. The movable wear-resistant plate 110 is pushed by the elastic propulsion device 111 and is always close to the double rollers 108 to ensure good sealing of the rolling area 208 and avoid material leakage and pressure loss.

[0027] The upper vacuum filter plate 105 and the lower vacuum filter plate 206 are powder sintered microporous filter plates.

[0028] A plurality of upper vacuum filter plates 105 are connected to an upper vacuum manifold 106 via a hose, and a plurality of lower vacuum filter plates 206 are connected to a lower vacuum manifold 102 via a hose. The upper vacuum manifold 106 and the lower vacuum manifold 102 are respectively connected to a vacuum pump, which can simplify the pipeline and optimize the vacuum effect.

[0029] The upper vacuum manifold 106 and the lower vacuum manifold 102 are respectively connected to arch breakers, and compressed air is intermittently sprayed into the vacuuming process to achieve automatic reverse clearing of the vacuum filter plate.

[0030] The lower shell 301 of the conical shell 201 can be disassembled independently so that the detachable spiral segment 207 can be replaced separately.

[0031] The stuffing box 103 has a lubricating oil passage 203 which can be connected to an automatic grease injection system.

[0032] Example 2

[0033] A working method of a vacuum forced feeder, the steps are as follows: powdery or particulate material enters the feeding bin 101 through the feed port 302, part of the air is extracted through the upper vacuum filter plate 105, when the material is pre-compressed by the rotating spiral section 207, the air between the material particles is further extracted through the lower vacuum filter plate 206; the material with reduced air content is finally pressed into the rolling area 208 between the double rollers 108, and is squeezed into a product mass by the double rollers 108. Since the amount of air contained in the product mass is greatly reduced, the problem of gas explosion when the product mass is separated from the double rollers 108 is fundamentally solved, thereby avoiding the cracking and breaking of the product mass, reducing product loss, improving product quality and output, and reducing energy consumption and equipment noise.

[0034] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit thereof, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum forced feeder, characterized in that: The invention comprises a feeding bin (101), a spiral shaft (204), a shaft drive (104) and a cheek plate assembly (112); the feeding bin (101) comprises a top cover (202) and a conical shell (201); the conical shell (201) is provided with a plurality of upper vacuum filter plates (105), a lower vacuum filter plate (206) and mounting legs (107); the top cover (202) is provided with a driving seat (303), a stuffing box (103), a center hole (304) and a feed port (302); a cheek plate mounting plate (109) is provided at the bottom of the conical shell (201); the spiral shaft (204) is provided with an external thread (403), a round nut (401), a cleaning scraper (205) and a detachable The screw shaft (204) passes through a stuffing box (103), and the stuffing box (103) passes through a center hole (304) and is mounted on a top cover (202) by a bolt pair; the shaft drive (104) is mounted on a top cover (202) of a feed bin (101) by a drive seat (303), is connected to the screw shaft (204) by a flat key (402), and axial positioning of the screw shaft (204) is achieved by an external thread (403) and a round nut (401); the cheek plate assembly (112) includes a movable wear-resistant plate (110) and an elastic propulsion device (111), and the elastic propulsion device (111) is mounted below a cheek plate mounting plate (109) by a bolt pair.

2. A vacuum forced feeder according to claim 1, characterized in that: The external thread (403) and the round nut (401) can axially lift or lower the screw shaft (204), thereby adjusting the gap between the screw shaft (204) and the inner wall of the conical shell (201), eliminating the gap change caused by machining and assembly errors and wear, and achieving good positioning of the screw shaft (204).

3. The vacuum forced feeder according to claim 1, characterized in that: The cleaning scraper (205) rotates with the spiral shaft in the feeding bin (101) to prevent the material from staying in the upper middle section of the feeding bin (101).

4. The vacuum forced feeder according to claim 1, characterized in that: The movable wear-resistant plate (110) is pushed by the elastic propulsion device (111) and is always in close contact with the double rollers (108), thereby ensuring good sealing of the rolling area (208) and avoiding material leakage and pressure loss.

5. The vacuum forced feeder according to claim 1, characterized in that: The upper vacuum filter plate (105) and the lower vacuum filter plate (206) are powder sintered microporous filter plates.

6. The vacuum forced feeder according to claim 1, characterized in that: A plurality of upper vacuum filter plates (105) are connected to an upper vacuum manifold (106) via a hose, and a plurality of lower vacuum filter plates (206) are connected to a lower vacuum manifold (102) via a hose. The upper vacuum manifold (106) and the lower vacuum manifold (102) are respectively connected to a vacuum pump, thereby simplifying the pipeline and optimizing the vacuuming effect.

7. A vacuum forced feeder according to claim 6, characterized in that: The upper vacuum manifold (106) and the lower vacuum manifold (102) are respectively connected to arch breakers, and compressed air is intermittently sprayed into the vacuuming process to achieve automatic reverse clearing of the vacuum filter plate.

8. The vacuum forced feeder according to claim 1, characterized in that: The lower shell (301) of the conical shell (201) can be disassembled independently so as to replace the detachable spiral segment (207) separately.

9. The vacuum forced feeder according to claim 1, characterized in that: The stuffing box (103) has a lubricating oil circuit (203) and can be connected to an automatic grease injection system.

10. A method for operating the vacuum forced feeder as claimed in claim 1, characterized in that: The steps are as follows: powdered or particulate materials enter the feed bin through the feed port, part of the air is extracted through the upper vacuum filter plate, and when the material is pre-compressed by the rotating spiral section, the air between the material particles is further extracted through the lower vacuum filter plate; the material with reduced air content is finally pressed into the rolling area between the double rollers and squeezed into product agglomerates by the double rollers.

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