Micro-positive pressure driving side sealing mechanism and spiral feeding cut-off device thereof

Abstract

The utility model provides a micro-positive pressure drive side sealing mechanism and its spiral feeding cut-off device, the mechanism includes: rotary shaft drive unit, multistage tower type seal cartridge and mounting casing, the device includes above-mentioned micro-positive pressure drive side sealing mechanism, when the multistage tower type seal cartridge and rotary shaft need to be sealed, the spiral feeding cut-off device is installed on the rotary shaft drive unit, and the spiral feeding cut-off device is installed on the rotary shaft drive unit. An external inflation device is connected with the micro-positive pressure air inlet, inflation is carried out between the multi-stage tower-shaped sealing sleeve and the rotating shaft, a micro-positive pressure space is formed, sealing of the rotating shaft is achieved, and friction between components can be avoided when the rotating shaft is driven through pneumatic sealing.

Description

TECHNICAL FIELD

[0001] The utility model relates to spiral feeding cutoff technical field especially relates to the driving side sealing mechanism of micro positive pressure and spiral feeding cutoff device thereof. BACKGROUND

[0002] At present, the known electronic metering device (such as quantitative packaging scale, electronic batching scale) is composed of feeding mechanism, weighing mechanism and unloading mechanism etc. The feeding mechanism of electronic metering device has multiple forms, and spiral feeder is one of the most commonly used. When the electronic scale works, the spiral feeder is started to deliver material to the weighing mechanism for weighing, when the required weight is reached, the spiral feeder stops working, and the weighing mechanism unloads the material, and the weighing is finished. Since the driving end of the existing spiral feeding cutoff device is generally connected through bearing or exposed, friction between components is easy to cause damage to the components. SUMMARY

[0003] To solve the above technical problems, one of the technical solutions of the utility model is: the driving side sealing mechanism of micro positive pressure, which is arranged on the driving end of the rotating shaft 2 of the material cylinder 1 and is used for micro positive pressure sealing of the driving end, and the mechanism comprises:

[0004] A rotating shaft driving unit 3 is used for driving the rotating shaft 2.

[0005] A multistage tower type sealing sleeve 4 is sleeved on the rotating shaft 2.

[0006] An installation shell 5 is sleeved on the multistage tower type sealing sleeve 4, one end of the installation shell 5 is installed on the material cylinder 1, and the other end of the installation shell 5 is installed on the rotating shaft driving unit 3.

[0007] Wherein, the two ends of the multistage tower type sealing sleeve 4 are provided with micro positive pressure air inlets 6, the micro positive pressure air inlets 6 are connected with the air charging device, air charging between the multistage tower type sealing sleeve 4 and the rotating shaft 2 is completed, a micro positive pressure space is formed, and sealing is realized.

[0008] Further, the multistage tower type sealing sleeve 4 is a sleeve body with a plurality of annular uniform grooves 7 in the inside.

[0009] Further, the rotating shaft driving unit 3 is a driving motor.

[0010] Further, the installation shell 5 is fixed with the material cylinder 1 and the rotating shaft driving unit 3 through the locking device.

[0011] Another technical solution of the utility model is: the spiral feeding cutoff device, which comprises the above-mentioned driving side sealing mechanism of micro positive pressure.

[0012] The advantages and positive effects of this utility model are: when it is necessary to seal between the multi-stage tower-type sealing sleeve 4 and the rotating shaft 2, the external inflation device 8 is connected to the micro-positive pressure air inlet 6 to inflate the space between the multi-stage tower-type sealing sleeve 4 and the rotating shaft 2, forming a micro-positive pressure space, thereby achieving the sealing of the rotating shaft 2. This pneumatic seal can avoid friction between components when driving the rotating shaft 2. Attached Figure Description

[0013] Figure 1 A schematic diagram of the drive-side sealing mechanism under slight positive pressure;

[0014] Figure 2 This is a schematic diagram of the spiral feeding shut-off device;

[0015] Figure 3 This is a side view of the spiral feeding shut-off device;

[0016] In the diagram: 1. Material cylinder; 2. Rotating shaft; 3. Rotating shaft drive unit; 4. Multi-stage tower-type sealing sleeve; 5. Mounting housing; 6. Micro-positive pressure air inlet; 7. Annular uniform distribution groove; 8. Air filling device. Detailed Implementation

[0017] To better understand this utility model, the present utility model will be further described below with reference to specific embodiments and accompanying drawings.

[0018] Example 1

[0019] like Figure 1 As shown, a micro-positive pressure drive-side sealing mechanism is installed on the drive end of the rotating shaft 2 of the material cylinder 1, and is used to provide a micro-positive pressure seal to the drive end. This mechanism includes:

[0020] Rotary shaft drive unit 3 is used to drive rotary shaft 2;

[0021] A multi-stage tower-shaped sealing sleeve 4 is fitted onto the rotating shaft 2;

[0022] The housing 5 is fitted onto the multi-stage tower-type sealing sleeve 4, with one end mounted on the material cylinder 1 and the other end mounted on the rotary shaft drive unit 3.

[0023] Specifically, there are multiple sealing rings between the mounting housing 5 and the multi-stage tower-shaped sealing sleeve 4.

[0024] The multi-stage tower-shaped sealing sleeve 4 has micro-positive pressure air inlets 6 at both ends. The micro-positive pressure air inlets 6 are connected to the inflation device 8 to inflate the space between the multi-stage tower-shaped sealing sleeve 4 and the rotating shaft 2, forming a micro-positive pressure space and achieving sealing.

[0025] Furthermore, the multi-stage tower-shaped sealing sleeve 4 is a sleeve with multiple levels of annular evenly distributed grooves 7 inside.

[0026] Furthermore, the rotary shaft drive unit 3 is a drive motor.

[0027] Furthermore, the mounting housing 5 is fixed to the material cylinder 1 and the rotating shaft drive unit 3 by a locking device.

[0028] Its working process: When it is necessary to seal between the multi-stage tower-type sealing sleeve 4 and the rotating shaft 2, the external inflation device 8 is connected to the micro-positive pressure air inlet 6 to inflate the space between the multi-stage tower-type sealing sleeve 4 and the rotating shaft 2, forming a micro-positive pressure space to achieve the sealing of the rotating shaft 2. This pneumatic seal can avoid friction between components when driving the rotating shaft 2.

[0029] Example 2

[0030] like Figures 2-3 As shown, the spiral feeding shut-off device includes the slightly positive pressure drive-side sealing mechanism described in Embodiment 1 above.

[0031] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made within the scope of this utility model should still fall within the scope of this patent.

Claims

1. A driving side seal mechanism of a micro-positive pressure, characterized by: The device is arranged on the driving end of the rotating shaft (2) of the barrel (1) and is used for micro-positive pressure sealing of the driving end, and comprises: a rotating shaft driving unit (3) for driving the rotating shaft (2); a multi-stage tower type sealing sleeve (4) sleeved on the rotating shaft (2); a mounting shell (5) sleeved on the multi-stage tower type sealing sleeve (4) and mounted on the barrel (1) at one end and on the rotating shaft driving unit (3) at the other end; wherein both ends of the multi-stage tower type sealing sleeve (4) are provided with micro-positive pressure air inlets (6) connected with air charging devices to complete air charging between the multi-stage tower type sealing sleeve (4) and the rotating shaft (2), form a micro-positive pressure space and realize sealing.

2. The positive micro-pressure drive side sealing mechanism according to claim 1, characterized by: The multi-stage tower type sealing sleeve (4) is a sleeve body with a plurality of annular uniform grooves (7) formed in the interior.

3. The positive micro-pressure drive side seal mechanism according to claim 2, characterized by: The rotating shaft driving unit (3) is a driving motor.

4. The positive micro-pressure drive side seal mechanism according to claim 3, characterized by: The mounting shell (5) is fixed with the barrel (1) and the rotating shaft driving unit (3) through locking devices.

5. A screw feed cutoff device characterized by: The device comprises the micro-positive pressure driving side sealing mechanism of any one of claims 1-4.

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