Device for preventing tobacco leaves from being polluted by leakage of main oil cylinder of preforming press

Abstract

The utility model discloses a device for preventing a main oil cylinder of a pre-press from leaking to pollute tobacco leaves, and particularly relates to the field of tobacco leaf packaging, which comprises a piston, and the surface of the piston is sleeved with a first V-shaped sealing assembly, a first guide copper sleeve, a second V-shaped sealing assembly, a second guide copper sleeve, a pressing cylinder cap and a dustproof ring from top to bottom. A piston end cover is installed on the surface of the piston, a cleaning cover is installed on the piston end cover, a nylon sleeve dust suction device is connected to the cleaning cover, the nylon sleeve dust suction device is installed on the pressing cylinder cap, and a plurality of suction ports are evenly formed in the nylon sleeve dust suction device. The oil liquid dust cleaning cover is installed on the outer side of the dustproof ring on the end face of the piston, the air suction ports are formed in the outer ring of the cleaning cover, and the air suction ports are connected with the external high-pressure centrifugal fan, so that the centrifugal fan is started when the piston returns, and oil liquid or dust on the surface of the piston can be cleaned and absorbed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a device for preventing leakage and pollution of tobacco leaves by a main oil cylinder of a pre-pressing machine. BACKGROUND

[0002] Currently, the packing equipment in the tobacco industry mainly uses a hydraulic oil cylinder piston to drive a pressure head for compaction or packing. The piston end face is sealed and isolated by a dustproof ring to isolate the oil and dust. However, in actual use, oil and a large amount of dust will still gather around the end face dustproof ring, affecting use. On the one hand, the permeated (leaked) oil gathers and drips down along the piston rod, and on the other hand, the oil mixed with dust adheres to the piston surface, affecting operation (or slides down the piston rod into the material). Currently, the conventional way of manual regular inspection and cleaning is used to solve this problem.

[0003] The pre-pressing machine of the tobacco leaf threshing and redrying production line generally uses a hydraulic oil cylinder to compact and form 200Kg of tobacco leaves. The main oil cylinder of the hydraulic system has the characteristics of fast speed, good rigidity, large pressure, and convenient control, and is widely used. However, the hydraulic system has a fatal weakness for tobacco processing, that is, hydraulic leakage will cause pollution of the tobacco leaves. In order to avoid the pollution of the processed tobacco leaves caused by hydraulic leakage, various methods are used by various manufacturers. There are three common modes:

[0004] The first is to increase the oil cylinder sealing (or add an oil absorption cloth sleeve at the position where the main oil cylinder piston rod extends). This way not only increases the resistance of the oil cylinder, causing wear of the piston rod, but also still has the risk of leakage after the sealing element is damaged (the cloth sleeve is full of oil, there is a risk of oil dripping, and replacing the oil absorption cloth sleeve also takes half an hour). In order to prevent the leakage of tobacco leaves during the feeding and compaction process, the pre-pressing and packing pressure head position often adopts a fully enclosed dust removal structure, which is not convenient for observing the leakage of the oil cylinder, thus causing hidden dangers of pollution of the tobacco leaves. When discovered, it may have caused huge losses of pollution of the tobacco leaves.

[0005] The second is to add fluorescent powder to the hydraulic oil, and then use a special light source to irradiate the piston rod. When the piston rod is detected to have hydraulic oil, the fluorescent light is reflected to alarm and stop the machine to replace the sealing element of the hydraulic system. This mode increases the impurities of fluorescent powder in the hydraulic oil, increases the wear of the hydraulic components, and the slight leakage cannot be detected. After detection, the sealing element needs to be replaced for two to three hours at the fastest, directly affecting the continuous operation of the tobacco leaf threshing and redrying production line. A large amount of tobacco material head and tail is wasted.

[0006] Third, the main cylinder piston rod on the pre-pressing machine is sleeved with a white cloth cover, and the main cylinder piston rod extending part is isolated from the tobacco. The white cloth cover can feedback the oil leakage point, and the cloth cover can be directly replaced after the oil point appears. However, the time for replacing the cloth cover is relatively long each time, and the cloth cover becomes a kind of consumable, thereby increasing the production cost of the threshing and redrying production line.

[0007] Therefore, we make improvements on this, and propose a device for preventing the main cylinder of the pre-pressing machine from leaking and polluting the tobacco. Content of the utility model

[0008] In order to solve the above technical problems, the utility model provides the following technical scheme:

[0009] The utility model discloses a device for preventing the main cylinder of the pre-pressing machine from leaking and polluting the tobacco, which comprises a piston, V-shaped sealing assembly one, guiding copper sleeve one, V-shaped sealing assembly two, guiding copper sleeve two, a pressing cylinder cap and a dustproof ring are installed on the surface of the piston from top to bottom, a piston end cover is installed on the surface of the piston, a cleaning cover is installed on the piston end cover, a nylon cover dust collection device is connected to the cleaning cover, the nylon cover dust collection device is installed on the pressing cylinder cap, and a plurality of suction ports are uniformly arranged on the nylon cover dust collection device.

[0010] As a preferred technical scheme of the utility model, the nylon cover dust collection device is sealed through a soft rubber pad between the buckle and the pressing cylinder cap, and there is a gap between the lower opening of the nylon cover dust collection device and the piston, and the gap is 1.5-2mm.

[0011] As a preferred technical scheme of the utility model, the nylon cover dust collection device is composed of two half cover bodies arranged symmetrically, and the nylon cover dust collection device is fixed on the pressing cylinder cap through four bolts.

[0012] As a preferred technical scheme of the utility model, a wrench rotating hole is arranged on the pressing cylinder cap, and the nylon cover of the nylon cover dust collection device is hung on the wrench rotating hole.

[0013] As a preferred technical scheme of the utility model, the suction port comprises an inner suction port and an outer suction port, the outer suction port is connected with a hose, and the outer suction port is connected to a dust collector through the hose.

[0014] As a preferred technical scheme of the utility model, the inner suction port is connected with an air pipe connecting port, the air pipe connecting port is connected with an inner side air suction channel, and there is a gap between the inner side air suction channel and the piston.

[0015] The utility model has the advantages of:

[0016] The utility model discloses a dust cleaning cover is arranged on the outer side of the dustproof ring of the piston end face, and a plurality of air inlets are arranged on the outer ring of the cleaning cover, the air inlets are connected with the external high-pressure centrifugal fan, and when the piston returns, the centrifugal fan is started, so that the oil or dust on the surface of the piston can be cleaned and absorbed.

[0017] In the utility model, the cleaning cover is bisected in the middle, so that it is convenient to install and disassemble. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings are used to provide further understanding of the utility model and constitute a part of the specification, are used together with the embodiments of the utility model to explain the utility model, and do not constitute the limitation on the utility model. In the drawings:

[0019] Figure 1 It is the structure diagram of the device for preventing the leakage of the main oil cylinder of the pre-press machine from polluting tobacco leaves Figure 1 ;

[0020] Figure 2 It is the structure diagram of the device for preventing the leakage of the main oil cylinder of the pre-press machine from polluting tobacco leaves Figure 2 ;

[0021] Figure 3 It is the structure diagram of the device for preventing the leakage of the main oil cylinder of the pre-press machine from polluting tobacco leaves Figure 3 ;

[0022] Figure 4 It is the structure diagram of the device for preventing the leakage of the main oil cylinder of the pre-press machine from polluting tobacco leaves Figure 4 ;

[0023] Figure 5 It is the structure diagram of the device for preventing the leakage of the main oil cylinder of the pre-press machine from polluting tobacco leaves Figure 5 ;

[0024] Figure 6 It is the structure diagram of the device for preventing the leakage of the main oil cylinder of the pre-press machine from polluting tobacco leaves Figure 6 .

[0025] In the drawing: 1, V-shaped sealing assembly one, 2, guide copper bush one, 3, V-shaped sealing assembly two, 4, guide copper bush two, 5, press cylinder cap, 6, cleaning cover, 61, air pipe connecting port, 62, inner side air inlet, 7, dustproof ring, 8, piston, 9, soft rubber pad, 10, cylinder barrel, 11, gap, 12, piston end cover, 13, bolt, 14, inner suction port, 15, dust collector, 151, settling chamber, 152, oil level sensor, 16, hose. DETAILED DESCRIPTION

[0026] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model.

[0027] Embodiment: as Figures 1 to 5 shown, the utility model discloses a device for preventing leakage and pollution of tobacco of pre-pressing machine main oil cylinder, including piston 8, the surface of piston 8 is from top to bottom respectively set with V-shaped sealing assembly one 1, guide copper sleeve one 2, V-shaped sealing assembly two 3, guide copper sleeve two 4, press cylinder cap 5 and dustproof ring 7, piston 8 and V-shaped sealing assembly one 1, guide copper sleeve one 2, V-shaped sealing assembly two 3, guide copper sleeve two 4, press cylinder cap 5 and dustproof ring 7 sliding connection, and the outside of V-shaped sealing assembly one 1, guide copper sleeve one 2, V-shaped sealing assembly two 3, guide copper sleeve two 4 is commonly provided with cylinder barrel 10, dustproof ring 7 can play the role of isolation to external dust, guide copper sleeve one 2 and guide copper sleeve two 4 can play the role of support and fixed, reduce friction simultaneously, V-shaped sealing assembly one 1 and V-shaped sealing assembly two 3 play the role of sealing, the surface of piston 8 is installed with piston end cover 12, and cleaning cover 6 is installed on piston end cover 12, and nylon cover dust collection device is connected on cleaning cover 6, and the dust and oil can be adsorbed through the nylon cover dust collection device. Nylon cover dust collection device is installed on press cylinder cap 5, and a plurality of suction ports are evenly provided on the nylon cover dust collection device, and the suction port is 4-6, as Figure 4 4, and the distribution is as follows, Figure 5 6, and the distribution is as follows.

[0028] The leakage detection standard of hydraulic oil cylinder is that the pressure is less than or equal to 16 MPa, and the leakage amount is less than or equal to 0.75 mL / min. Generally, the surface of the piston 8 is attached with hydraulic oil, which will contact the ash during the compaction of tobacco and adhere to the ash. During the retraction of the piston 8, the ash will be shaken or scraped off by the dustproof ring 7 and fall back into the tobacco, causing pollution of the tobacco.

[0029] The nylon cover dust collection device is sealed between the upper buckle and the press cylinder cap 5 by the soft rubber pad 9, and there is a gap 11 between the lower opening of the nylon cover dust collection device and the piston 8, and the gap 11 is 1.5-2 mm. The gap 11 is more convenient for adsorbing oil and dust. The suction port includes an inner suction port 14 and an outer suction port, and the outer suction port is connected with a hose 16, and the outer suction port is communicated with a dust collector 15 through the hose 16. The hose 16 is a steel wire braided hose, and existing air pipe joints are arranged at both ends of the hose 16. Please refer to Figure 6For the convenience of understanding, a plurality of outer suction ports are marked in the figure, and the actual number can be adjusted according to the actual situation. The electric control valve is also installed on the hose 16, the dust collector 15 is a prior art, and a settling chamber 151 and an oil level sensor 152 are also arranged inside, and the specific working principle is not described in detail here. The arrangement of the oil level sensor 152 and the settling chamber 151 facilitates the observation and judgment of the condition of the collected hydraulic oil. The inner suction port 14 is connected with the air pipe connection port 61, the air pipe connection port 61 is connected with the inner side air inlet 62, and the inner side air inlet 62 has a gap with the piston 8. During adsorption, the oil and dust enter the air pipe connection port 61 from the inner side air inlet 62, then enter the inner suction port 14 and the outer suction port, and finally are discharged.

[0030] Under the assistance of the dust collector 15, a negative pressure is formed between the outer suction port of the nylon sleeve dust collection device and the piston 8, and the piston 8 is cleaned, and the dust and leaked hydraulic oil are sucked away.

[0031] The nylon sleeve dust collection device is composed of two half sleeve bodies arranged symmetrically, and the nylon sleeve dust collection device is fixed on the pressing cylinder cap 5 through four bolts 13, facilitating disassembly and installation.

[0032] The pressing cylinder cap 5 is provided with a wrench rotation hole, and the nylon sleeve of the nylon sleeve dust collection device is hung on the wrench rotation hole.

[0033] The device can form a protection for the hydraulic oil cylinder piston 8, the hydraulic dust has been taken away by the dust collection device, avoiding being brought into the oil cylinder, protecting the sealing element and the hydraulic oil. The leaked hydraulic oil can also be sucked away in time, avoiding mixing with the soot to form oil ash and causing pollution of the tobacco leaves.

[0034] Even if the sealing element of the hydraulic system has a slight failure, the condition of the collected hydraulic oil can be judged through the connected dust collector 15, and the sealing element of the hydraulic oil cylinder can be replaced in time. Moreover, the oil cylinder has a slight leakage, and does not need to be stopped immediately. The dust collection system can clean the hydraulic oil on the piston 8. The sealing element can be replaced during daily maintenance shutdown.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A device for preventing leakage from the main hydraulic cylinder of a pre-compressor that contaminates tobacco leaves, characterized in that, The piston (8) is fitted with V-shaped sealing component 1 (1), guide copper sleeve 1 (2), V-shaped sealing component 2 (3), guide copper sleeve 2 (4), pressing cylinder cap (5) and dustproof ring (7) from top to bottom. The piston (8) is fitted with piston end cap (12), and a cleaning cover (6) is installed on piston end cap (12). A nylon sleeve dust collection device is connected to the cleaning cover (6). The nylon sleeve dust collection device is installed on pressing cylinder cap (5), and multiple suction ports are evenly opened on the nylon sleeve dust collection device.

2. The device for preventing leakage and contamination of tobacco leaves from the main hydraulic cylinder of a pre-compressor according to claim 1, characterized in that, The upper buckle of the nylon sleeve dust collection device is sealed with a soft rubber pad (9) between the clamping cylinder cap (5) and the lower opening of the nylon sleeve dust collection device and the piston (8), and the gap (11) is 1.5-2mm.

3. The device for preventing leakage and contamination of tobacco leaves from the main hydraulic cylinder of a pre-compressor according to claim 1, characterized in that, The nylon sleeve dust collection device consists of two symmetrically arranged half-sleeves, and the nylon sleeve dust collection device is fixed to the pressure cylinder cap (5) by four bolts (13).

4. The device for preventing leakage and contamination of tobacco leaves from the main hydraulic cylinder of a pre-compressor according to claim 1, characterized in that, The clamping cylinder cap (5) is provided with a wrench rotation hole, and the nylon sleeve on the nylon sleeve dust collection device is hung on the wrench rotation hole.

5. The device for preventing leakage and contamination of tobacco leaves from the main hydraulic cylinder of a pre-compressor according to claim 1, characterized in that, The suction port includes an inner suction port (14) and an outer suction port. The outer suction port is connected to a hose (16) and is connected to the vacuum cleaner (15) through the hose (16).

6. The device for preventing leakage and contamination of tobacco leaves from the main hydraulic cylinder of a pre-compressor according to claim 5, characterized in that, The inner suction port (14) is connected to the air pipe connection port (61), the air pipe connection port (61) is connected to the inner air intake channel (62), and there is a gap between the inner air intake channel (62) and the piston (8).

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