Spiral feeding stop device

Abstract

According to the spiral feeding stop device, when the multistage tower-shaped sealing sleeve and the rotating shaft need to be sealed, an external inflation device is connected with the micro-positive pressure air inlet, inflation is conducted between the multistage tower-shaped sealing sleeve and the rotating shaft, a micro-positive pressure space is formed, and sealing of the rotating shaft is achieved; the pneumatic seal can avoid friction between parts when the rotating shaft is driven. When air extraction is needed, the air extraction opening is connected with an external air extraction pump, lateral air extraction is carried out on the interior of the charging barrel, the internal pressure of the charging barrel is made to be uniform, excessive air extraction is avoided, and materials in the charging barrel are stably conveyed and metered. When the end of the charging barrel needs to be pneumatically sealed, a pushing air cylinder in the baffle pneumatic unit drives a pushing rod to be pushed out, the shaft penetrating baffle is made to be close to the end of the rotating shaft, after the upper end of the shaft penetrating baffle is close to the elastic positioning block, the pushing air cylinder is stopped, sealing of the end of the rotating shaft is completed, and powdery materials are prevented from entering the end of the charging barrel.

Description

Technical Field

[0001] The invention relates to the technical field of spiral feeding, in particular to a spiral feeding cut-off device. Background Art

[0002] At present, the known electronic metering devices (such as quantitative packaging scales and electronic batching scales) are composed of a feeding mechanism, a weighing mechanism and a unloading mechanism. There are many forms of feeding mechanisms for electronic metering devices, and the spiral feeder is the most commonly used one. When the electronic scale is working, the spiral feeder is started to transport the material to the weighing mechanism for weighing. When the required weight is reached, the spiral feeder stops working, the weighing mechanism unloads the material, and the weighing ends. The existing spiral feeding cut-off device has the following problems at the driving end: 1. Generally, it is connected through bearings or exposed connections, which easily causes friction between components and damage to components; 2. When transporting powder or feeding, the end is evacuated, and the exhaust pressure is uneven, which easily leads to over-extraction problems; 3. When transporting powder or feeding, its end is easily immersed in powder, causing jamming and damage to bearings and rotating shafts. Summary of the invention

[0003] In order to solve the above technical problems, the technical solution adopted by the present invention is: a spiral feeding cut-off device, which comprises:

[0004] Barrel 1;

[0005] A feed port 2, which is mounted on one end of the barrel 1;

[0006] A discharge port 3, which is mounted on the other end of the barrel 1;

[0007] A rotating shaft 4 is inserted into the barrel 1;

[0008] A slightly positive pressure driving side sealing mechanism 5, which is arranged on the driving end of the rotating shaft 4, is used to perform a slightly positive pressure sealing on the driving end, and is installed in the barrel 1 near one end of the feed port 2;

[0009] A side-mounted vacuum mechanism 6 is arranged in the middle of the barrel 1 to evacuate the inside of the barrel 1, thereby forming a vacuum inside the barrel 1 and preventing excessive vacuuming;

[0010] An end sealing mechanism 7, which is arranged at the end of the rotating shaft 4 close to the discharge port 3, is used to seal the end of the barrel to prevent the powdered material from entering the end of the barrel;

[0011] The material breaking block 8 is mounted on the rotating shaft 4 and is used to break up the material for easy transmission.

[0012] Furthermore, the slightly positive pressure driving side sealing mechanism 5 comprises:

[0013] A rotating shaft driving unit 501, used to drive the rotating shaft 4;

[0014] A multi-stage tower-shaped sealing sleeve 502, which is sleeved on the rotating shaft 4;

[0015] The housing 503 is mounted on the multi-stage tower-shaped sealing sleeve 502, and one end of the housing 503 is mounted on the barrel 1, and the other end of the housing 503 is mounted on the rotating shaft driving unit 501;

[0016] Among them, both ends of the multi-stage tower-shaped sealing sleeve 502 are provided with micro-positive pressure air inlets 504, and the micro-positive pressure air inlets 504 are connected to the inflation device to complete the inflation between the multi-stage tower-shaped sealing sleeve 502 and the rotating shaft 4, forming a micro-positive pressure space to achieve sealing.

[0017] Furthermore, the multi-stage tower-shaped sealing sleeve 502 is a sleeve body having multi-stage annular evenly distributed grooves 505 formed therein.

[0018] Furthermore, the side-mounted air extraction mechanism 6 comprises:

[0019] An external mounting body 601, which is located on the outer surface of the barrel 1;

[0020] A mounting cavity 602, which is inserted into the external mounting body 601;

[0021] At least two layers of semicircular bodies 603, which are located in the mounting cavity 602 and fit tightly with the opening of the barrel 1;

[0022] The air extraction port 604 is used to connect an external air extraction pump;

[0023] Wherein, ventilation holes are evenly opened on the semicircular body 603.

[0024] Furthermore, a side-mounted exhaust mechanism end cover 605 is provided at the lower end of the installation cavity 602 , and the exhaust port 604 is located on the side-mounted exhaust mechanism end cover 605 .

[0025] Furthermore, when the semicircular body 603 is multi-layered, a filter layer 606 is provided between each layer of the semicircular body 603 .

[0026] Furthermore, the end sealing mechanism 7 comprises:

[0027] The mounting base 701 is used to carry the components of the mechanism, and the mounting base 3 and the barrel are arranged perpendicular to each other;

[0028] The baffle pneumatic unit 702 is used to pneumatically seal the end of the barrel 1. The baffle pneumatic unit 702 is installed on the mounting base 701, and its movement direction is parallel to the axis of the rotating shaft 4;

[0029] The rotary seal support unit 703 is used to seal the end of the rotary shaft 4. The rotary seal support unit 703 is mounted on the mounting base 701, and its mounting position is parallel to the movement direction of the baffle pneumatic unit 4.

[0030] The baffle pneumatic unit 702 and the rotary seal support unit 703 are both mounted on the mounting base 701 via a common base end cover 704 .

[0031] Furthermore, the baffle pneumatic unit 702 includes:

[0032] A mounting body 7021, which is mounted on the base end cover 704;

[0033] A push rod 7022, which is installed in the installation body 7021;

[0034] A pushing cylinder 7023 is installed at one end of the mounting body 7021 away from the base end cover 704, and the pushing end of the pushing cylinder 7023 is fixedly connected to the push rod 7022;

[0035] The shaft-penetrating baffle 7024 has its upper end mounted on the push rod 7022;

[0036] The housing end cover 7025 is located at an end away from the base end cover 704;

[0037] The lower end of the through-axis baffle 7024 passes through the rotating shaft 4, so that the through-axis baffle 7024 moves along the axial direction of the rotating shaft 4;

[0038] An elastic positioning block 7026 is provided on the inner wall of the mounting base 701 which is arranged opposite to the through-shaft baffle 7024;

[0039] An adjustment sheet 7027 is provided between the through-axis baffle 7024 and the push rod 7022 for adjusting the distance between the rotating shaft 2 and the through-axis baffle 7024;

[0040] The adjusting piece 7027 is slidably mounted on the rotating shaft 4 at one end close to the rotating shaft 4;

[0041] There are mounting bearings 7028 between the adjustment piece 7027 and the rotating shaft 4 , between the shaft-penetrating baffle 7024 and the rotating shaft 4 , and between the push rod 7022 and the mounting body 7021 .

[0042] Furthermore, the rotary seal support unit 703 includes:

[0043] A sealing mounting block 7031, which is mounted on the base end cover 704;

[0044] The sealing ring 7032 and the sealing bearing 7033 are sequentially mounted on the rotating shaft 4;

[0045] Seal end cap 7034.

[0046] The advantages and positive effects of the present invention are: when it is necessary to seal between the multi-stage tower-type sealing sleeve and the rotating shaft, the external inflation device is connected to the micro-positive pressure air inlet, and the space between the multi-stage tower-type sealing sleeve and the rotating shaft is inflated to form a micro-positive pressure space, thereby achieving sealing of the rotating shaft. This pneumatic seal can avoid friction between components when driving the rotating shaft.

[0047] When vacuuming is required, the vacuum port is connected to an external vacuum pump to perform lateral vacuuming in the barrel to make the internal pressure of the barrel uniform, avoid over-vacuuming, and ensure smooth transportation and metering of the material in the barrel.

[0048] When it is necessary to pneumatically seal the end of the barrel, the push cylinder in the baffle pneumatic unit drives the push rod to push out, so that the through-shaft baffle is close to the end of the rotating shaft. When the upper end of the through-shaft baffle is close to the elastic positioning block, the pushing cylinder is stopped to complete the sealing of the end of the rotating shaft to prevent powdered materials from entering the end of the barrel.

[0049] When it is necessary to adjust the specific distance between the through-shaft baffle and the rotating shaft, it can be achieved by fine-tuning the adjustment sheet.

[0050] And through the multi-layer sealing ring and sealing bearing in the rotating seal support unit, better sealing effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a structural schematic diagram of the spiral feeding cut-off device;

[0052] Figure 2 It is a side view of the spiral feeding cut-off device;

[0053] Figure 3 is a schematic structural diagram of a rotary shaft drive unit;

[0054] Figure 4 It is a structural schematic diagram of a side-mounted air extraction mechanism;

[0055] Figure 5 It is a side view of the side-mounted air extraction mechanism;

[0056] Figure 6 is a structural schematic diagram of the end sealing mechanism;

[0057] In the figure: 1. barrel; 2. feed port; 3. discharge port; 4. rotating shaft; 5. slightly positive pressure driving side sealing mechanism;

[0058] 501, rotating shaft driving unit; 502, multi-stage tower type sealing sleeve; 503, mounting housing; 504, slightly positive pressure air inlet;

[0059] 6. Side-mounted air extraction mechanism; 601. External mounting body; 602. Mounting cavity; 603. Semicircular body; 604. Air extraction port; 605. Side-mounted air extraction mechanism end cap; 606. Filter layer;

[0060] 7. End sealing mechanism; 701. Mounting base; 702. Baffle pneumatic unit; 7021. Mounting body; 7022. Push rod; 7023. Push cylinder; 7024. Through-shaft baffle; 7025. Shell end cover; 7026. Elastic positioning block; 7027. Adjustment sheet; 7028. Mounting bearing; 703. Rotary seal support unit; 7031. Seal mounting block; 7032. Seal ring; 7033. Seal bearing; 7034. Seal end cover; 704. Base end cover; 8. Material scattering block. DETAILED DESCRIPTION

[0061] In order to better understand the present invention, the present invention is further described below in conjunction with specific embodiments and drawings.

[0062] like Figure 1-2 As shown, the spiral feeding cut-off device comprises:

[0063] Barrel 1;

[0064] A feed port 2, which is mounted on one end of the barrel 1;

[0065] A discharge port 3, which is mounted on the other end of the barrel 1;

[0066] A rotating shaft 4 is inserted into the barrel 1;

[0067] A slightly positive pressure driving side sealing mechanism 5, which is arranged on the driving end of the rotating shaft 4, is used to perform a slightly positive pressure sealing on the driving end, and is installed in the barrel 1 near one end of the feed port 2;

[0068] like Figure 3 As shown, further, the slightly positive pressure driving side sealing mechanism 5 comprises:

[0069] A rotating shaft driving unit 501, used to drive the rotating shaft 4;

[0070] A multi-stage tower-shaped sealing sleeve 502, which is sleeved on the rotating shaft 4;

[0071] The housing 503 is mounted on the multi-stage tower-shaped sealing sleeve 502, and one end of the housing 503 is mounted on the barrel 1, and the other end of the housing 503 is mounted on the rotating shaft driving unit 501;

[0072] Among them, both ends of the multi-stage tower-shaped sealing sleeve 502 are provided with micro-positive pressure air inlets 504, and the micro-positive pressure air inlets 504 are connected to the inflation device to complete the inflation between the multi-stage tower-shaped sealing sleeve 502 and the rotating shaft 4, forming a micro-positive pressure space to achieve sealing.

[0073] Furthermore, the multi-stage tower-shaped sealing sleeve 502 is a sleeve body having multi-stage annular evenly distributed grooves 505 formed therein.

[0074] A side-mounted vacuum mechanism 6 is arranged in the middle of the barrel 1 to evacuate the inside of the barrel 1, thereby forming a vacuum inside the barrel 1 and preventing excessive vacuuming;

[0075] like Figure 4-5 As shown, further, the side-mounted air extraction mechanism 6 includes:

[0076] An external mounting body 601, which is located on the outer surface of the barrel 1;

[0077] A mounting cavity 602, which is inserted into the external mounting body 601;

[0078] At least two layers of semicircular bodies 603, which are located in the mounting cavity 602 and fit tightly with the opening of the barrel 1;

[0079] The air extraction port 604 is used to connect an external air extraction pump;

[0080] Wherein, ventilation holes are evenly opened on the semicircular body 603.

[0081] Furthermore, a side-mounted exhaust mechanism end cover 605 is provided at the lower end of the installation cavity 602 , and the exhaust port 604 is located on the side-mounted exhaust mechanism end cover 605 .

[0082] Furthermore, when the semicircular body 603 is multi-layered, a filter layer 606 is provided between each layer of the semicircular body 603 .

[0083] like Figure 6 As shown, the end sealing mechanism 7 is arranged at the end of the rotating shaft 4 close to the discharge port 3, and is used to seal the end of the barrel to prevent the powdered material from entering the end of the barrel;

[0084] The mounting base 701 is used to carry the components of the mechanism, and the mounting base 3 and the barrel are arranged perpendicular to each other;

[0085] The baffle pneumatic unit 702 is used to pneumatically seal the end of the barrel 1. The baffle pneumatic unit 702 is installed on the mounting base 701, and its movement direction is parallel to the axis of the rotating shaft 4;

[0086] The rotary seal support unit 703 is used to seal the end of the rotary shaft 4. The rotary seal support unit 703 is mounted on the mounting base 701, and its mounting position is parallel to the movement direction of the baffle pneumatic unit 702.

[0087] The baffle pneumatic unit 702 and the rotary seal support unit 703 are both mounted on the mounting base 701 via a common base end cover 704 .

[0088] Furthermore, the baffle pneumatic unit 702 includes:

[0089] A mounting body 7021, which is mounted on the base end cover 704;

[0090] A push rod 7022, which is installed in the installation body 7021;

[0091] A pushing cylinder 7023 is installed at one end of the mounting body 7021 away from the base end cover 704, and the pushing end of the pushing cylinder 7023 is fixedly connected to the push rod 7022;

[0092] The shaft-penetrating baffle 7024 has its upper end mounted on the push rod 7022;

[0093] The housing end cover 7025 is located at an end away from the base end cover 704;

[0094] The lower end of the through-axis baffle 7024 passes through the rotating shaft 4, so that the through-axis baffle 7024 moves along the axial direction of the rotating shaft 4;

[0095] An elastic positioning block 7026 is provided on the inner wall of the mounting base 701 which is arranged opposite to the through-shaft baffle 7024;

[0096] An adjustment sheet 7027 is provided between the through-axis baffle 7024 and the push rod 7022 for adjusting the distance between the rotating shaft 2 and the through-axis baffle 7024;

[0097] The adjusting piece 7027 is slidably mounted on the rotating shaft 4 at one end close to the rotating shaft 4;

[0098] There are mounting bearings 7028 between the adjustment piece 7027 and the rotating shaft 4 , between the shaft-penetrating baffle 7024 and the rotating shaft 4 , and between the push rod 7022 and the mounting body 7021 .

[0099] Furthermore, the rotary seal support unit 703 includes:

[0100] A sealing mounting block 7031, which is mounted on the base end cover 704;

[0101] The sealing ring 7032 and the sealing bearing 7033 are sequentially mounted on the rotating shaft 4;

[0102] Seal end cap 7034.

[0103] The material breaking block 8 is mounted on the rotating shaft 4 and is used to break up the material for easy transmission.

[0104] Furthermore, the end sealing mechanism 7 comprises:

[0105] Its working process: the material enters from the feed port, is transmitted through the rotating shaft, and is broken up by the material breaking block for easy transmission, and then is sent out through the discharge port.

[0106] When it is necessary to seal between the multi-stage tower-type sealing sleeve and the rotating shaft, the external inflation device is connected to the micro-positive pressure air inlet, and air is inflated between the multi-stage tower-type sealing sleeve and the rotating shaft to form a micro-positive pressure space to achieve sealing of the rotating shaft. This pneumatic seal can avoid friction between components when driving the rotating shaft.

[0107] When vacuuming is required, the vacuum port is connected to an external vacuum pump to perform lateral vacuuming in the barrel to make the internal pressure of the barrel uniform, avoid over-vacuuming, and ensure smooth transportation and metering of the material in the barrel.

[0108] When it is necessary to pneumatically seal the end of the barrel, the push cylinder in the baffle pneumatic unit drives the push rod to push out, so that the through-shaft baffle is close to the end of the rotating shaft. When the upper end of the through-shaft baffle is close to the elastic positioning block, the pushing cylinder is stopped to complete the sealing of the end of the rotating shaft to prevent powdered materials from entering the end of the barrel.

[0109] When it is necessary to adjust the specific distance between the through-shaft baffle and the rotating shaft, it can be achieved by fine-tuning the adjustment sheet.

[0110] And through the multi-layer sealing ring and sealing bearing in the rotating seal support unit, better sealing effect can be achieved.

[0111] The embodiments of the present invention are described in detail above, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of this patent.

Claims

1. Spiral feeding cut-off device, characterized by: The device includes: Barrel (1); A feed port (2) mounted on one end of the barrel (1); A discharge port (3) mounted on the other end of the barrel (1); A rotating shaft (4) inserted into the barrel (1); A micro-positive pressure driving side sealing mechanism (5), which is arranged on the driving end of the rotating shaft (4) and is used to perform micro-positive pressure sealing on the driving end, and is installed on the barrel (1) near one end of the feed port (2); A side-mounted air extraction mechanism (6) is arranged in the middle of the barrel (1) to extract air from the inside of the barrel (1), thereby forming a vacuum inside the barrel (1) and preventing excessive air extraction; An end sealing mechanism (7) is arranged at the end of the rotating shaft (4) close to the discharge port (3) and is used to seal the end of the barrel to prevent powdered material from entering the end of the barrel; The material breaking block (8) is mounted on the rotating shaft (4) and is used to break up the material for easy transmission.

2. The spiral feeding cut-off device according to claim 1 is characterized in that: The slightly positive pressure driving side sealing mechanism (5) comprises: A rotating shaft driving unit (501), used for driving the rotating shaft (4); A multi-stage tower-shaped sealing sleeve (502) is sleeved on the rotating shaft (4); The mounting shell (503) is mounted on the multi-stage tower-shaped sealing sleeve (502), and one end of the mounting shell is mounted on the barrel (1), and the other end of the mounting shell is mounted on the rotating shaft driving unit (501); Wherein, micro-positive pressure air inlets (504) are provided at both ends of the multi-stage tower-shaped sealing sleeve (502), and the micro-positive pressure air inlets (504) are connected to the inflation device to inflate the space between the multi-stage tower-shaped sealing sleeve (502) and the rotating shaft (4), thereby forming a micro-positive pressure space and achieving sealing.

3. The spiral feeding cut-off device according to claim 2 is characterized in that: The multi-stage tower-shaped sealing sleeve (502) is a sleeve body having multi-stage annular evenly distributed grooves (505) formed therein.

4. The spiral feeding cut-off device according to claim 1 is characterized in that: The side-mounted air extraction mechanism (6) comprises: An external mounting body (601) located on the outer surface of the barrel (1); A mounting cavity (602) inserted into the external mounting body (601); At least two layers of semicircular bodies (603), which are located in the mounting cavity (602) and fit tightly with the opening of the barrel (1); An air extraction port (604) for connecting an external air extraction pump; Wherein, ventilation holes () are evenly arranged on the semicircular body (603).

5. The spiral feeding cut-off device according to claim 4 is characterized in that: A side-mounted air suction mechanism end cover (605) is provided at the lower end of the installation cavity (602), and the air suction port (604) is located on the side-mounted air suction mechanism end cover (605).

6. The spiral feeding cut-off device according to claim 5 is characterized in that: When the semicircular body (603) is multi-layered, a filter layer (606) is provided between each layer of the semicircular body (603).

7. The spiral feeding cut-off device according to claim 1 is characterized in that: The end sealing mechanism (7) comprises: A mounting base (701) is used to carry various components of the mechanism, wherein the mounting base (3) and the barrel are arranged perpendicular to each other; A baffle pneumatic unit (702) is used to pneumatically seal the end of the barrel (1), wherein the baffle pneumatic unit (702) is mounted on the mounting base (701), and its movement direction is parallel to the axis of the rotating shaft (4); A rotary seal support unit (703) is used to seal the end of the rotary shaft (4), wherein the rotary seal support unit (703) is mounted on the mounting base (701), and its mounting position is parallel to the movement direction of the baffle pneumatic unit (4); The baffle pneumatic unit (702) and the rotary seal support unit (703) are both mounted on the mounting base (701) via a common base end cover (704).

8. The spiral feeding cut-off device according to claim 7 is characterized in that: The baffle pneumatic unit (702) comprises: A mounting body (7021) mounted on the base end cover (704); A push rod (7022) mounted in the mounting body (7021); A pushing cylinder (7023) is installed at one end of the mounting body (7021) away from the base end cover (704), and the pushing end of the pushing cylinder (7023) is fixedly connected to the push rod (7022); A shaft-penetrating baffle (7024), the upper end of which is mounted on the push rod (7022); A shell end cover (7025) located at an end away from the base end cover (704); The lower end of the through-axis baffle (7024) passes through the rotating shaft (4), so that the through-axis baffle (7024) moves along the axial direction of the rotating shaft (4); An elastic positioning block (7026) is provided on the inner wall of the mounting base (701) arranged opposite to the through-shaft baffle (7024); An adjustment sheet (7027) is provided between the through-axis baffle (7024) and the push rod (7022) for adjusting the distance between the rotating shaft (2) and the through-axis baffle (7024); The adjusting piece (7027) is slidably mounted on the rotating shaft (4) at one end close to the rotating shaft (4); There are mounting bearings (7028) between the adjustment sheet (7027) and the rotating shaft (4), between the shaft-penetrating baffle (7024) and the rotating shaft (4), and between the push rod (7022) and the mounting body (7021).

9. The spiral feeding cut-off device according to claim 7, characterized in that: The rotary seal support unit (703) comprises: A sealing mounting block (7031) mounted on the base end cover (704); A sealing ring (7032) and a sealing bearing (7033) are sequentially mounted on the rotating shaft (4); Seal end cap (7034).

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