Dust-free screening elevator for powders

Abstract

This invention discloses a dust-free screening and lifting machine for powdered materials, comprising: a screening and lifting unit including a lifting cylinder and a screening cylinder, wherein the lifting cylinder is provided with a lifting chamber and a discharge chamber, the screening cylinder is coaxially rotatably disposed in the lifting chamber, a spiral plate is spirally arranged around the periphery of the screening cylinder, a screen is provided on the upper surface of the spiral plate, and the bottom opening of the screening cylinder extends into the discharge chamber; a discharge unit including a cylinder cover and a collecting hopper, wherein the bottom of the collecting hopper is provided with a discharge cylinder, an elastic element and a connecting rod, an avoidance groove is provided on the discharge cylinder, a sliding rod is provided on the cylinder cover, a claw cover is slidably disposed on the sliding rod, and the claw cover is inserted into the discharge cylinder through the avoidance groove. This invention, through a reasonable structural design, can screen powdered materials of different fineness while lifting, saving processes and improving efficiency. Furthermore, no dust is generated during lifting and screening, making it healthy, environmentally friendly, safe and reliable.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and specifically to a dust-free screening elevator for powdered materials. Background Technology

[0002] When preparing flour and other powdered materials, granular or lumpy raw materials need to be crushed and rolled multiple times to improve the quality of the powder. The equipment used for crushing and rolling typically involves feeding the raw materials from a height. Under gravity, the materials pass through the grinding discs and other components of the equipment, turning them into powder before being discharged. However, a single crushing and rolling process is usually insufficient to produce powder of the correct fineness from all raw materials, requiring secondary or even tertiary crushing and rolling. This necessitates lifting the previously processed raw materials to a higher height for re-feeding. The traditional method involves using a screening machine to remove the finely ground materials, while the unfinely ground materials are lifted by an elevator. However, traditional elevators typically use pipes for suction, and the strong airflow can cause some powder to spill out, seriously threatening human health and environmental safety. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a dust-free screening and lifting machine for powdered materials. Through reasonable structural design, it can screen powdered materials of different fineness while lifting, saving processes and improving efficiency. At the same time, no dust is generated during lifting and screening, making it healthy, environmentally friendly, safe and reliable.

[0004] To solve the above-mentioned technical problems, the present invention provides a dust-free screening and lifting machine for powdered materials, comprising: a screening and lifting unit, the screening and lifting unit including a lifting cylinder and a screening cylinder, the lifting cylinder having a lifting chamber and a discharge chamber, the bottom and top of the lifting chamber respectively having a feed inlet and a discharge outlet, the screening cylinder being coaxially rotatably disposed within the lifting chamber, the screening cylinder having a spiral plate spirally arranged around its periphery, the upper surface of the spiral plate having a screen mesh communicating with the interior of the screening cylinder, the bottom of the screening cylinder being open and extending into the discharge chamber; and a discharge unit, wherein... The discharge unit includes a cylindrical cover covering the bottom of the discharge chamber and a collection hopper slidably disposed within the discharge chamber. The bottom of the collection hopper is provided with a discharge cylinder, an elastic element, and a connecting rod. The discharge cylinder has a clearance groove. The elastic element is located between the cylindrical cover and the collection hopper. The connecting rod extends through the cylindrical cover. A sliding rod is provided on the cylindrical cover, and a claw cover is slidably disposed on the sliding rod. The claw cover is hinged to the connecting rod and inserted into the discharge cylinder via the clearance groove. A drive unit is also included, disposed on the lifting cylinder and connected to the screening cylinder, for driving the screening cylinder to rotate.

[0005] In a preferred embodiment of the present invention, the connecting rod further includes a first connecting rod and a second connecting rod. The first connecting rod is disposed at the bottom of the collecting hopper and extends through the bottom of the cylinder cover. One end of the second connecting rod is hinged to the end of the first connecting rod that extends through the cylinder cover. The sliding rod is disposed at the bottom of the cylinder cover, and a slider is slidably disposed on the sliding rod. The other end of the second connecting rod is hinged to the slider. The claw cover includes a first claw cover and a second claw cover that are opposite each other. The first claw cover and the second claw cover are respectively disposed on two sliders. The clearance groove is formed on the discharge cylinder along the direction of the central axis of the lifting cylinder, and the first claw cover and the second claw cover are inserted into the clearance groove.

[0006] In a preferred embodiment of the present invention, the first claw cover and the second claw cover are respectively provided with three fork teeth and two fork teeth, and the clearance grooves are respectively provided with three and two on the side of the first claw cover and the second claw cover. The first claw cover and the second claw cover are inserted into the discharge cylinder through the clearance grooves and completely block the discharge cylinder after being assembled.

[0007] In a preferred embodiment of the present invention, the elastic element is further comprising a spring.

[0008] In a preferred embodiment of the present invention, the lifting cylinder is further included to be hollow inside, and a partition plate is provided inside the lifting cylinder to divide the hollow part of the lifting cylinder into the lifting chamber and the discharge chamber. The inlet and the outlet are both connected to the lifting chamber, and the inlet is located at the bottom of the lifting chamber and the outlet is located at the top of the lifting chamber.

[0009] In a preferred embodiment of the present invention, the screening cylinder is further comprising a hollow interior, with a closed top and an open bottom, the hollow portion of the screening cylinder forming a collection chamber, and the top of the screening cylinder being not lower than the discharge port.

[0010] In a preferred embodiment of the present invention, the screening cylinder is further provided with a connecting port spirally formed around its periphery, the maximum diameter of the spiral plate is consistent with the inner diameter of the lifting chamber, the interior of the spiral plate is hollow to form a screening chamber, and the screening chamber is connected to the screen and the connecting port respectively.

[0011] In a preferred embodiment of the present invention, the bottom of the cylinder cover is provided with a guide hole along the central axis of the lifting cylinder, and the discharge cylinder is slidably disposed in the guide hole.

[0012] In a preferred embodiment of the present invention, the collecting hopper is further shaped like a funnel.

[0013] In a preferred embodiment of the present invention, the driving unit further includes a motor and a drive shaft. The motor is disposed at the top end of the lifting cylinder, and the drive shaft is disposed at the free end of the motor. The drive shaft passes through the lifting cylinder and is connected to the screening cylinder.

[0014] The beneficial effects of this invention are:

[0015] This invention relates to a dust-free powder screening and lifting machine. The machine incorporates a screening and lifting unit where raw materials are fed into the lifting chamber through the inlet. The rotating screening cylinder drives a spiral plate, lifting the raw materials upwards. The raw materials on the spiral plate are primarily supported by a screen. As the raw materials move upwards on the screen, those with a fineness smaller than the screen's standard will fall into the screening chamber, where they are collected and then fall back down. Ultimately, raw materials with a fineness greater than the screen's standard are lifted to the outlet and discharged, while those with a fineness smaller than the screen's standard fall back down into the discharge chamber, achieving both lifting and screening. The discharge unit is designed to ensure that the powder discharged through the discharge cylinder remains stationary, preventing dust from spreading and protecting personnel safety and the environment, thus avoiding extreme situations such as dust explosions. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the dust-free screening and lifting machine for powdered materials in a preferred embodiment of the present invention;

[0017] Figure 2 This is a cross-sectional schematic diagram of a dust-free screening and lifting machine for powdered materials in a preferred embodiment of the present invention;

[0018] Figure 3 For the present invention Figure 2 Enlarged diagram of section A in the middle;

[0019] Figure 4 This is a front view of the discharge unit in its closed state;

[0020] Figure 5 This is a bottom view of the closed discharge unit.

[0021] Figure 6 This is a front view of the discharge unit with the part partially open.

[0022] Figure 7 This is a bottom view of the material discharge unit with the part partially open.

[0023] Explanation of the labels in the diagram:

[0024] 1-Screening and lifting unit, 2-Drive unit, 3-Discharge unit;

[0025] Elevating cylinder, 101-Inlet, 102-Divider plate, 103-Elevating chamber, 104-Outlet, 105-Discharge chamber;

[0026] 11-Screening cylinder, 111-Collection chamber, 112-Connecting port, 113-Spiral plate, 114-Screen, 115-Screening chamber;

[0027] 13-Cylinder cap, 130-Guide hole;

[0028] 14-Collection hopper, 141-Discharge cylinder;

[0029] 150-Elastic element, 151-First connecting rod, 152-Second connecting rod, 153-Sliding rod, 154-Sliding block, 155-First claw cover, 156-Second claw cover, 157-Allowing groove;

[0030] 20 - Motor, 21 - Drive shaft. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention. Example

[0032] This invention discloses a dust-free screening and lifting machine for powdered materials, with reference to... Figures 1-3 As shown, it includes a screening and lifting unit 1, a driving unit 2, and a discharge unit 3.

[0033] The aforementioned screening and lifting unit 1 includes a lifting cylinder 10 and a screening cylinder 11.

[0034] The aforementioned lifting cylinder 10 is hollow inside. A partition plate 102 is provided inside the lifting cylinder 10. The partition plate 102 divides the hollow part of the lifting cylinder 10 into a lifting chamber 103 and a discharge chamber 105. The lifting cylinder 10 is provided with a feed inlet 101 and a discharge outlet 104. Both the feed inlet 101 and the discharge outlet 104 are connected to the lifting chamber 103, with the feed inlet 101 located at the bottom of the lifting chamber 103 and the discharge outlet 104 located at the top of the lifting chamber 103.

[0035] The screening cylinder 11 is hollow inside, with a closed top and an open bottom. The hollow part inside the screening cylinder 11 is the collection chamber 111. The screening cylinder 11 is rotatably mounted inside the lifting cylinder 10 and is coaxial with the lifting cylinder 10. The top of the screening cylinder 11 is not lower than the discharge port 104. The bottom opening of the screening cylinder 11 extends through the partition plate 102 into the discharge chamber 105, so that the collection chamber 111 communicates with the discharge chamber 105. A connecting port 112 is spirally opened around the periphery of the screening cylinder 11. A spiral plate 113 is spirally arranged around the periphery of the screening cylinder 11. The maximum diameter of the spiral plate 113 is the same as the inner diameter of the lifting chamber 103. A screen 114 is laid on the upper surface of the spiral plate 113. The interior of the spiral plate 113 is hollow, forming a screening chamber 115. The screening chamber 115 is connected to both the screen 114 and the connecting port 112. During operation, raw materials are fed into the lifting chamber 103 through the feed inlet 101. The screening cylinder 11 rotates, driving the spiral plate 113 to rotate, thereby lifting the raw materials upward. The raw materials on the spiral plate 113 are mainly supported by the screen 114. As the raw materials move upward on the screen 114, those with a fineness smaller than the screen 114 standard will fall into the screening chamber 115, and then be collected and fall through the collection chamber 111. Ultimately, raw materials with a fineness greater than the screen 114 standard will be lifted to the discharge outlet 104 and discharged, while raw materials with a fineness smaller than the screen 114 standard will fall through the collection chamber 111 into the discharge chamber 105, thus achieving the lifting and screening of raw materials.

[0036] The aforementioned discharge unit 3 includes a cylinder cover 13, a collection hopper 14, and an opening / closing section.

[0037] The aforementioned cover 13 is placed over the bottom of the lifting cylinder 10. A guide hole 130 is provided at the bottom of the cover 13 along the central axis of the lifting cylinder 10.

[0038] The aforementioned collecting hopper 14 is funnel-shaped. The collecting hopper 14 is slidably disposed within the discharge chamber 105. A discharge cylinder 141 is provided at the bottom of the collecting hopper 14. The discharge cylinder 141 is slidably disposed within the guide hole 130 to prevent powdery materials from falling from the clearance hole.

[0039] Reference Figures 4-7 As shown, the opening and closing part includes an elastic element 150, a first connecting rod 151, a second connecting rod 152, a sliding rod 153, a slider 154, a first claw cover 155, a second claw cover 156, and a clearance groove 157.

[0040] The aforementioned elastic element 150 is disposed between the cylinder cover 13 and the collecting hopper 14. A first connecting rod 151 is disposed at the bottom of the collecting hopper 14 and extends through the bottom of the cylinder cover 13. One end of a second connecting rod 152 is hinged to the end of the first connecting rod 151 that extends through the cylinder cover 13. A sliding rod 153 is disposed at the bottom of the cylinder cover 13. A slider 154 is slidably disposed on the sliding rod 153, and the other end of the second connecting rod 152 is hinged to the slider 154. A first claw cover 155 and a second claw cover 156 are respectively disposed on the two sliders 154 in the two sets of opening and closing portions. A clearance groove 157 is formed on the discharge cylinder 141 along the central axis of the lifting cylinder. The first claw cover 155 and the second claw cover 156 are inserted into the clearance groove 157. During operation, the powder falling from the collection chamber 111 falls into the collection hopper 14; the lower layer of the collection hopper 14 is gradually filled with the settled powder, and as more powder falls, the weight of the collection hopper 14 increases; when the elastic force of the elastic element 150 is exceeded, the collection hopper 14 begins to slide down; the first connecting rod 151 and the second connecting rod 152 push the slider away from the discharge cylinder 141, thereby separating the first claw cover 155 and the second claw cover 156, opening the bottom of the discharge cylinder 141, and allowing the settled powder to fall out. The powder is discharged through the discharge cylinder 141. As the amount of powder settled in the collection hopper 14 decreases, the weight of the collection hopper 14 decreases, the collection hopper 14 rises, and the first claw cover 155 and the second claw cover 156 are reinserted into the clearance groove 157 and joined together to seal the discharge cylinder 141. The above optimized design ensures that the powder discharged through the discharge cylinder 141 is always settled, preventing dust from spreading everywhere, protecting personnel safety and environmental friendliness, and avoiding extreme situations such as dust explosions.

[0041] In some preferred embodiments of the present invention, the first claw cover 155 and the second claw cover 156 respectively have three fork teeth and two fork teeth. The clearance groove 157 has three and two grooves respectively on the sides of the first claw cover 155 and the second claw cover 156. The first claw cover 155 and the second claw cover 156 are inserted into the discharge cylinder 141 via the clearance groove 157, and after being assembled, completely block the discharge cylinder 141.

[0042] The aforementioned elastic element 150 can be a spring.

[0043] The aforementioned drive unit 2 includes a motor 20 and a drive shaft 21. The motor 20 is located at the top of the lifting cylinder 10. The drive shaft 21 is located at the free end of the motor 20. The drive shaft 21 passes through the lifting cylinder 10 and is connected to the screening cylinder 11. The motor 20 can drive the screening cylinder 11 to rotate via the drive shaft 21.

[0044] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A dust-free screening and lifting machine for powdered materials, characterized in that, include: A screening and lifting unit includes a lifting cylinder and a screening cylinder. The lifting cylinder is provided with a lifting chamber and a discharge chamber. The bottom and top of the lifting chamber are respectively provided with a feed inlet and a discharge outlet. The screening cylinder is coaxially rotatably disposed in the lifting chamber. The screening cylinder is spirally provided with a spiral plate around its periphery. A screen is provided on the upper surface of the spiral plate. The screen is in communication with the inside of the screening cylinder. The bottom of the screening cylinder is open and extends into the discharge chamber. The discharge unit includes a cylindrical cover covering the bottom of the discharge chamber and a collection hopper slidably disposed in the discharge chamber. The bottom of the collection hopper is provided with a discharge cylinder, an elastic element and a connecting rod. The discharge cylinder is provided with a clearance groove. The elastic element is located between the cylindrical cover and the collection hopper. The connecting rod extends out of the cylindrical cover. The cylindrical cover is provided with a sliding rod. A claw cover is slidably disposed on the sliding rod. The claw cover is hinged to the connecting rod. The claw cover is inserted into the discharge cylinder through the clearance groove. A drive unit is disposed on the lifting cylinder and connected to the screening cylinder, and is used to drive the screening cylinder to rotate; The connecting rod includes a first connecting rod and a second connecting rod. The first connecting rod is disposed at the bottom of the collecting hopper and extends through the bottom of the cylinder cover. One end of the second connecting rod is hinged to the end of the first connecting rod that extends through the cylinder cover. The sliding rod is disposed at the bottom of the cylinder cover, and a slider is slidably disposed on the sliding rod. The other end of the second connecting rod is hinged to the slider. The claw cover includes a first claw cover and a second claw cover that are opposite each other. The first claw cover and the second claw cover are respectively disposed on two sliders. The clearance groove is opened on the discharge cylinder along the direction of the central axis of the lifting cylinder, and the first claw cover and the second claw cover are inserted into the clearance groove. The screening cylinder has a spiral opening around its periphery, and the maximum diameter of the spiral plate is the same as the inner diameter of the lifting chamber. The interior of the spiral plate is hollow, forming a screening chamber, which is connected to the screen and the opening.

2. The dust-free screening and lifting machine for powdered materials as described in claim 1, characterized in that: The first claw cover and the second claw cover have three fork teeth and two fork teeth respectively. The clearance groove has three and two grooves on the side of the first claw cover and the second claw cover respectively. The first claw cover and the second claw cover are inserted into the discharge cylinder through the clearance groove and completely block the discharge cylinder after being assembled.

3. The dust-free screening and lifting machine for powdered materials as described in claim 2, characterized in that: The elastic element is a spring.

4. The dust-free screening and lifting machine for powdered materials as described in claim 1, characterized in that: The lifting cylinder is hollow inside, and a partition plate is provided inside the lifting cylinder. The partition plate divides the hollow part of the lifting cylinder into the lifting chamber and the discharge chamber. The inlet and the outlet are both connected to the lifting chamber, and the inlet is located at the bottom of the lifting chamber and the outlet is located at the top of the lifting chamber.

5. The dust-free screening and lifting machine for powdered materials as described in claim 4, characterized in that: The screening cylinder is hollow inside, with a closed top and an open bottom. The hollow part inside the screening cylinder forms a collection chamber, and the top of the screening cylinder is not lower than the discharge port.

6. The dust-free screening and lifting machine for powdered materials as described in claim 1, characterized in that: The bottom of the cylinder cover has a guide hole along the central axis of the lifting cylinder, and the discharge cylinder is slidably disposed in the guide hole.

7. The dust-free screening and lifting machine for powdered materials as described in claim 1, characterized in that: The collection hopper is funnel-shaped.

8. The dust-free screening and lifting machine for powdered materials as described in claim 1, characterized in that: The drive unit includes a motor and a drive shaft. The motor is located at the top of the lifting cylinder, and the drive shaft is located at the free end of the motor. The drive shaft passes through the lifting cylinder and is connected to the screening cylinder.

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