Pressure control system of flexible cutter door and tobacco cutter

Abstract

The utility model relates to the technical field of tobacco cutting, and provides a pressure control system of a flexible cutter door and a tobacco cutter. The pressure control system of the flexible knife door is characterized by comprising an air source, a first pipeline, a second pipeline, a third pipeline, a valve group and an air cylinder, the valve group is connected with an air source through a first pipeline, the cylinder is connected with the valve group through a third pipeline, and two ends of a second pipeline are respectively connected with the first pipeline and a pilot hole of the valve group; the pressure of the compressed air in the second pipeline is larger than or equal to the pressure needed when the valve set is conducted, and the pressure of the compressed air in the first pipeline is smaller than the pressure of the compressed air in the second pipeline. According to the pressure control system of the flexible knife door, the compressed air in the air source can be directly introduced into the valve bank through the second pipeline, the valve bank is promoted to be in a conducting state, the compressed air in the first pipeline enters the air cylinder through the third pipeline, the pressure of the compressed air is small, the quality of tobacco shreds cannot be affected, and then the quality of the tobacco shreds is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tobacco cutting machine and a flexible knife door pressure control system. BACKGROUND

[0002] The tobacco cutting machine uses compressed air as power, and the compressed air provides power for a knife door cylinder of the tobacco cutting machine to move the knife door cylinder and compact the material. The compressed air is also used to blow away the broken material between the upper chain transmission system and the wall plate.

[0003] The knife door cylinder is usually connected with an electromagnetic valve, and the electromagnetic valve drives the knife door cylinder to act when it is turned on. However, to make the electromagnetic valve in the on state, a high air pressure needs to be provided to move the valve core of the electromagnetic valve. When the pressure of the compressed air is high, the pressure applied to the material by the knife door cylinder is too large, which affects the cutting quality of the material, causes the tobacco to be "woven" and "adhere", and makes the color of the tobacco darker, directly affecting the sensory quality of the finished tobacco. At the same time, it also aggravates the wear of the equipment parts, causes the driving shaft to break, the bearing to be damaged, the conveying chain to be worn, and the wear plate to be worn, and other faults. SUMMARY

[0004] The utility model provides a flexible knife door pressure control system and a tobacco cutting machine to solve the defect that the pressure of the compressed air acting on the material is too large in the prior art.

[0005] The utility model provides a flexible knife door pressure control system, which comprises an air source, a first pipeline, a second pipeline, a third pipeline, a valve group and a cylinder, the valve group is connected with the air source through the first pipeline, the cylinder is connected with the valve group through the third pipeline, and the two ends of the second pipeline are connected with the first pipeline and a pilot hole of the valve group respectively, the pressure of the compressed air in the second pipeline is greater than or equal to the pressure required when the valve group is turned on, and the pressure of the compressed air in the first pipeline is less than the pressure of the compressed air in the second pipeline.

[0006] According to the flexible knife door pressure control system, the valve group comprises a proportional pressure reducing valve and a first pilot valve, the proportional pressure reducing valve is connected with the first pipeline and the first pilot valve, the first pilot valve is connected with the cylinder through the third pipeline, the two ends of the first pilot valve are provided with the pilot hole, and the second pipeline is connected with the pilot hole.

[0007] According to the flexible knife door pressure control system, the number of the third pipelines is two, one third pipeline is communicated with a rodless cavity of the cylinder, and one third pipeline is communicated with a rod cavity of the cylinder.

[0008] The pressure control system of the flexible knife door further comprises a plurality of throttle valve groups, each of the throttle valve groups is arranged on one third pipeline, and the throttle valve group is located between the first pilot valve and the air cylinder.

[0009] The pressure control system of the flexible knife door further comprises a plurality of throttle valve groups, each of the throttle valve groups is arranged on one third pipeline, and the throttle valve group is located between the first pilot valve and the air cylinder.

[0010] The pressure control system of the flexible knife door further comprises a second pilot valve, the second pilot valve is arranged on the first pipeline and located upstream of the proportional pressure reducing valve.

[0011] The pressure control system of the flexible knife door further comprises a pressure sensor, the pressure sensor is arranged on the first pipeline and located upstream of the second pilot valve, and the connection position of the second pipeline and the first pipeline is located between the pressure sensor and the second pilot valve.

[0012] The pressure control system of the flexible knife door further comprises a second one-way valve, a fourth pipeline and a dust removal mechanism, the second one-way valve is arranged on the first pipeline and located between the second pilot valve and the pressure sensor, the dust removal mechanism is connected with the first pipeline through the fourth pipeline, and the connection position of the fourth pipeline and the first pipeline is located upstream of the second one-way valve.

[0013] The pressure control system of the flexible knife door further comprises a pressure reducing valve and a third pilot valve, the pressure reducing valve and the third pilot valve are arranged on the fourth pipeline, the pressure reducing valve is located upstream of the third pilot valve, and the third pilot valve is located upstream of the dust removal mechanism.

[0014] The utility model further provides a tobacco cutter, including flexible knife door and like above described pressure control system of flexible knife door, the air cylinder in pressure control system of flexible knife door is connected with flexible knife door.

[0015] The pressure control system of the flexible knife door provided by the utility model can directly introduce compressed air in the air source into the valve group through the second pipeline, the pressure of the part of compressed air is large, can directly promote the valve core of the valve group to move, and make the valve group in the on state, when the valve group is in the on state, the compressed air in the first pipeline enters the air cylinder through the third pipeline, the pressure of the part of compressed air is small, will not cause the influence to the quality of tobacco shred, and further guarantees the quality of tobacco shred. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the pressure control system for the flexible knife gate provided by this utility model.

[0018] Figure label:

[0019] 10. Air source; 21. First pilot valve; 22. Proportional pressure reducing valve; 30. Cylinder; 40. Second pilot valve; 50. Pressure sensor; 60. Throttling valve assembly; 70. Second check valve; 80. Pressure reducing valve; 90. Third pilot valve; 100. Dust removal mechanism; 201. First pipeline; 202. Second pipeline; 203. Third pipeline; 204. Fourth pipeline; 601. Throttling valve; 602. First check valve. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] The following is combined with Figure 1 This invention describes a pressure control system for a flexible blade gate and a tobacco shredder.

[0022] like Figure 1 As shown in the embodiment of this utility model, the pressure control system of the flexible knife gate includes: an air source 10, a valve assembly, a cylinder 30, a first pipeline 201, a second pipeline 202, and a third pipeline 203. The valve assembly is connected to the air source 10 through the first pipeline 201, the cylinder 30 is connected to the valve assembly through the third pipeline 203, and both ends of the second pipeline 202 are connected to the first pipeline 201 and the pilot hole of the valve assembly, respectively. The pressure of the compressed air in the second pipeline 202 is greater than or equal to the pressure required for the valve assembly to be turned on, and the pressure of the compressed air in the first pipeline 201 is less than the pressure of the compressed air in the second pipeline 202.

[0023] Specifically, the valve assembly has pilot holes at both ends, and the second pipe 202 is connected to the pilot holes of the valve assembly. Compressed air from the air source 10 enters the valve assembly through the pilot holes via the first pipe 201 and the second pipe 202. Since the pressure of the compressed air in the second pipe 202 is greater than or equal to the pressure required for the valve assembly to open, the valve assembly is thus activated. The air source 10 is also connected to other air inlets of the valve assembly via the first pipe, and compressed air can also directly enter the valve assembly through the first pipe 201. When the valve assembly is activated, this portion of compressed air enters the cylinder 30 through the third pipe 203, causing the cylinder 30 to move the flexible blade to cut the tobacco.

[0024] Furthermore, in this embodiment, by adding a second pipeline 202, the pressure of the compressed air in the second pipeline 202 is relatively large, which can independently open the valve group; while the pressure of the compressed air entering the cylinder 30 through the valve group and the third pipeline 203 is relatively small. When the cylinder 30 drives the flexible knife gate to move, it will not cause the tobacco to "stick together" or "adhere" to the tobacco, thus ensuring the quality of the tobacco.

[0025] The pressure control system for the flexible knife gate provided in this embodiment of the utility model connects the second pipeline to the first pipeline and the pilot hole of the valve group. Compressed air from the air source can be directly introduced into the valve group through the second pipeline. The pressure of this compressed air is relatively high, which can directly cause the valve core of the valve group to move, so that the valve group is in the conducting state. When the valve group is in the conducting state, the compressed air in the first pipeline enters the cylinder through the third pipeline. The pressure of this compressed air is relatively low, which will not affect the quality of the tobacco, thereby ensuring the quality of the tobacco.

[0026] like Figure 1 As shown, in an embodiment of this utility model, the valve group includes: a first pilot valve 21 and a proportional pressure reducing valve 22. The proportional pressure reducing valve 22 is connected to the first pipeline 201 and the first pilot valve 21. The first pilot valve 21 is connected to the cylinder 30 through the third pipeline 203. The first pilot valve 21 has pilot holes at both ends, and the second pipeline 202 is connected to the pilot holes.

[0027] Specifically, in this embodiment, the first pilot valve 21 is a three-position five-way pilot valve. Pilot holes are provided at both ends of the first pilot valve 21. The second pipeline 202 connects to the pilot holes and then communicates with the first pipeline 201. The first pipeline 201 is connected to the proportional pressure reducing valve 22, which is connected to one of the air inlets of the first pilot valve 21.

[0028] In this embodiment, the cylinder 30 has a double piston and double telescopic rod structure. The space between the two pistons is the rodless chamber of the cylinder 30, and the chamber containing the telescopic rod is the rod chamber of the cylinder 30. There are two third pipes 203, one connected to the rodless chamber of the cylinder 30 and the other connected to the two rod chambers of the cylinder 30. The other two ends of the two third pipes 203 are connected to the two air holes of the first pilot valve 21.

[0029] When compressed air enters the first pilot valve 21 through the second pipeline 202, the valve core of the first pilot valve 21 moves, and the first pilot valve 21 is opened. The compressed air in the first pipeline 201 enters the rodless chamber of the cylinder 30 through the third pipeline 203, and the compressed air in the rod chamber enters the first pilot valve 21 through the third pipeline 203, causing the telescopic rod to extend and drive the flexible knife gate to cut the tobacco. Correspondingly, when the valve core of the first pilot valve 21 switches positions, compressed air enters the rod chamber of the cylinder 30, and compressed air in the rodless chamber enters the first pilot valve 21, causing the telescopic rod to retract, thereby driving the flexible knife gate away from the tobacco.

[0030] like Figure 1 As shown in the embodiment of this utility model, the pressure control system of the flexible knife gate also includes multiple throttle valve groups 60, each throttle valve group 60 is disposed in a third pipeline 203, and each throttle valve group 60 is located between the first pilot valve 21 and the cylinder 30.

[0031] Specifically, in this embodiment, each third pipeline 203 is equipped with a throttle valve assembly 60, and each throttle valve assembly 60 includes a first check valve 602 and a throttle valve 601. Taking one throttle valve assembly 60 as an example, when compressed air enters the rodless chamber of the cylinder 30 through the first pilot valve 21, the compressed air flows through the throttle valve 601 into the rodless chamber of the cylinder 30. The throttle valve 601 reduces the flow rate, thereby reducing the pressure of the compressed air entering the rodless chamber. When the gas in the rodless chamber enters the first pilot valve 21, the compressed air flows through the first check valve 602 into the first pilot valve 21. Correspondingly, the principle of the other throttle valve assembly 60 is the same, so it will not be described again here.

[0032] like Figure 1 As shown, in an embodiment of this utility model, the pressure control system of the flexible knife gate further includes a second pilot valve 40. The second pilot valve 40 is disposed in the first pipeline 201 and located upstream of the proportional pressure reducing valve 22. The second pilot valve 40 is used to control the on / off connection between the first pipeline 201 and the valve group. When the second pilot valve 40 is in the open state, compressed air flows through the second pilot valve 40 and enters the valve group.

[0033] Furthermore, in this embodiment, the second pilot valve 40 is a two-position three-way pilot valve.

[0034] As Figure 1 shown in the embodiment of the utility model, the pressure control system of flexible knife door still includes pressure sensor 50, pressure sensor 50 sets up in first pipeline 201, and is located the upstream of second pilot valve 40, and the connecting place of second pipeline 202 and first pipeline 201 is located between pressure sensor 50 and second pilot valve 40.

[0035] Specifically, pressure sensor 50 is arranged between the air source 10 and the second pilot valve 40, and the pressure sensor 50 is used for detecting the pressure of the compressed air passing through the first pipeline 201.

[0036] As Figure 1 shown in the embodiment of the utility model, the pressure control system of flexible knife door still includes: second check valve 70, dust removal mechanism 100 and fourth pipeline 204. Second check valve 70 sets up in first pipeline 201, and is located between second pilot valve 40 and pressure sensor 50, dust removal mechanism 100 is connected with first pipeline 201 by fourth pipeline 204, and the connecting place of fourth pipeline 204 and first pipeline 201 is located the upstream of second check valve 70.

[0037] Specifically, the compressed air in the air source 10 flows into the valve group after passing through the second check valve 70 and entering the pilot hole of the first pilot valve 21 through the second pipeline 202; the compressed air in the air source 10 can also enter the dust removal mechanism 100 through the fourth pipeline 204 for purging.

[0038] As Figure 1 shown, the pressure control system of flexible knife door still includes: pressure reducing valve 80 and third pilot valve 90, pressure reducing valve 80 and third pilot valve 90 are both arranged in fourth pipeline 204, pressure reducing valve 80 is located the upstream of third pilot valve 90, and third pilot valve 90 is located the upstream of dust removal mechanism 100.

[0039] Specifically, the compressed air enters the dust removal mechanism 100 through the pressure reducing valve 80 and the third pilot valve 90, and the third pilot valve 90 is a two-position three-way pilot valve.

[0040] The embodiment of the utility model further provides a tobacco cutter, which comprises a flexible knife door and a pressure control system of the flexible knife door, and the air cylinder 30 in the pressure control system of the flexible knife door is connected with the flexible knife door.

[0041] Specifically, the pressure control system of the flexible knife door comprises: an air source 10, a valve group, an air cylinder 30, a first pipeline 201, a second pipeline 202 and a third pipeline 203. The valve group is connected with the air source 10 through the first pipeline 201, the air cylinder 30 is connected with the valve group through the third pipeline 203, and the two ends of the second pipeline 202 are connected with the first pipeline 201 and a pilot hole of the valve group respectively. The pressure of compressed air in the second pipeline 202 is greater than or equal to the pressure required when the valve group is turned on, and the pressure of compressed air in the first pipeline 201 is less than that in the second pipeline 202.

[0042] The valve group has a pilot hole at two ends, and the second pipeline 202 is communicated with the pilot hole of the valve group. The compressed air in the air source 10 enters the valve group through the first pipeline 201 and the second pipeline 202 and the pilot hole of the valve group, and since the pressure of compressed air in the second pipeline 202 is greater than or equal to the pressure required when the valve group is turned on, the valve group is turned on. The air source 10 is also communicated with other air inlet holes of the valve group through the first pipeline, and the compressed air can also directly enter the valve group through the first pipeline 201, and when the valve group is turned on, this part of compressed air enters the air cylinder 30 through the third pipeline 203, so as to drive the flexible knife door to move to cut the tobacco.

[0043] Further, in the embodiment, by additionally arranging the second pipeline 202, the pressure of compressed air in the second pipeline 202 is relatively large, and the valve group can be independently opened; and the pressure of compressed air entering the air cylinder 30 through the valve group and the third pipeline 203 is relatively small, and when the flexible knife door is driven to move by the air cylinder 30, the phenomenon of “filament combination” and “adhesion” of the tobacco will not occur, so as to ensure the quality of the tobacco.

[0044] The tobacco cutting machine provided by the embodiment of the utility model, through the pressure control system of the flexible knife door, the compressed air in the air source can be directly introduced into the valve group through the second pipeline, the pressure of this part of compressed air is relatively large, and the valve core of the valve group can be directly driven to move, so that the valve group is in the turned-on state, when the valve group is in the turned-on state, the compressed air in the first pipeline enters the air cylinder through the third pipeline, the pressure of this part of compressed air is relatively small, and the quality of the tobacco will not be affected, so as to ensure the quality of the tobacco.

[0045] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, rather than limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A pressure control system for a flexible knife gate, characterized by, include: Air source, first pipeline, second pipeline, third pipeline, valve assembly and cylinder; The valve assembly is connected to the air source through the first pipeline, the cylinder is connected to the valve assembly through the third pipeline, and the two ends of the second pipeline are respectively connected to the first pipeline and the pilot hole of the valve assembly. The pressure of the compressed air in the second pipeline is greater than or equal to the pressure required for the valve group to be turned on, and the pressure of the compressed air in the first pipeline is less than the pressure of the compressed air in the second pipeline.

2. The flexible knife gate pressure control system of claim 1, wherein, The valve assembly includes a proportional pressure reducing valve and a first pilot valve, wherein the proportional pressure reducing valve is connected to the first pipeline and the first pilot valve. The first pilot valve is connected to the cylinder through the third pipeline. The first pilot valve has pilot holes at both ends, and the second pipeline is connected to the pilot holes.

3. The flexible knife gate pressure control system of claim 2, wherein, There are two third pipelines, one of which is connected to the rodless chamber of the cylinder, and the other is connected to the rod chamber of the cylinder.

4. The flexible knife gate pressure control system of claim 3, wherein, It also includes multiple throttle valve assemblies, each of which is disposed in one of the third pipelines, and the throttle valve assembly is located between the first pilot valve and the cylinder.

5. The flexible knife gate pressure control system of claim 4, wherein, The throttle valve assembly includes a throttle valve and a first check valve. Compressed air flows from the first pilot valve through the throttle valve into the cylinder, and compressed air flows from the cylinder through the first check valve into the first pilot valve.

6. The flexible knife gate pressure control system of claim 2, wherein, It also includes a second pilot valve, which is located in the first pipeline and upstream of the proportional pressure reducing valve.

7. The flexible knife gate pressure control system of claim 6, wherein, It also includes a pressure sensor, which is located in the first pipeline and upstream of the second pilot valve; The connection point between the second pipeline and the first pipeline is located between the pressure sensor and the second pilot valve.

8. The flexible knife gate pressure control system of claim 7, wherein, Also includes: The system includes a second one-way valve, a fourth pipeline, and a dust removal mechanism. The second one-way valve is located in the first pipeline and between the second pilot valve and the pressure sensor. The dust removal mechanism is connected to the first pipeline through the fourth pipeline, and the connection point between the fourth pipeline and the first pipeline is located upstream of the second one-way valve.

9. The flexible knife gate pressure control system of claim 8, wherein, Also includes: A pressure reducing valve and a third pilot valve are provided, both of which are located in the fourth pipeline. The pressure reducing valve is located upstream of the third pilot valve, and the third pilot valve is located upstream of the dust removal mechanism.

10. A tobacco cutter, characterized by The invention includes a flexible blade gate and a pressure control system for the flexible blade gate according to any one of claims 1-9, wherein a cylinder in the pressure control system of the flexible blade gate is connected to the flexible blade gate.

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