阅读说明：本技术 一种高密闭干法机挤压密封结构 (Extrusion sealing structure of high-tightness dry method machine ) 是由 方正 朱礼宾 江聪聪 孙健 黄建民 郦骏 赵冬魁 于 2020-03-20 设计创作，主要内容包括：本发明公开了一种高密闭干法机挤压密封结构,包括挤压部件及前罩门,所述挤压部件包括上挤压箱体及下挤压箱体,其特征在于,所述上挤压箱体上设有上气密封快接头,所述上挤压箱体内设有上挤压密封结构,并通过上气密封快接头通入压力气流进入上挤压密封结构,反吹阻止物料渗入；所述下挤压箱体上设有下气密封快接头,下挤压箱体内设有下挤压密封结构,并通过下气密封快接头通入压力气流进入下挤压密封结构,反吹阻止物料渗入。本发明的有益效果是：通过设置的气密封通道、气流通道、通气挡环能够向上挤压箱体或下挤压箱体内通入了一定压力的气流,则将反吹阻止物料渗入,起到气密封作用。(The invention discloses an extrusion sealing structure of a high-tightness dry machine, which comprises an extrusion part and a front cover door, wherein the extrusion part comprises an upper extrusion box body and a lower extrusion box body; the lower extrusion box body is provided with a lower air sealing quick connector, a lower extrusion sealing structure is arranged in the lower extrusion box body, pressure air flow is introduced through the lower air sealing quick connector to enter the lower extrusion sealing structure, and materials are prevented from permeating through back blowing. The invention has the beneficial effects that: the air-tight sealing channel, the airflow channel and the air-tight baffle ring can extrude the box body upwards or extrude the box body downwards, and air flow with certain pressure is introduced into the box body, so that the material is prevented from permeating through back flushing, and the air-tight sealing effect is achieved.)

1. A high-tightness dry machine extrusion sealing structure comprises an extrusion part (1) and a front cover door (2), wherein the extrusion part (1) comprises an upper extrusion box body (102) and a lower extrusion box body (105), and is characterized in that an upper air sealing quick connector (107) is arranged on the upper extrusion box body (102), an upper extrusion sealing structure is arranged in the upper extrusion box body (102), pressure air flow is introduced into the upper extrusion sealing structure through the upper air sealing quick connector (107), and materials are prevented from permeating through back flushing; the lower extrusion box body (105) is provided with a lower air-tight quick connector (106), the lower extrusion box body (104) is internally provided with a lower extrusion sealing structure, pressure air flow is introduced through the lower air-tight quick connector (106) to enter the lower extrusion sealing structure, and material infiltration is prevented by back flushing.

2. The extrusion sealing structure of the high-tightness dry machine is characterized in that the upper extrusion sealing structure comprises a main shaft (109), an extrusion box body end cover (124), a front cover door bottom plate (123), a sealing end cover (121) and a sealing connecting plate (112), wherein the sealing end cover (121) is in threaded connection with the extrusion box body end cover (124), the extrusion box body end cover (124) is fixed on the upper extrusion box body (102), and the sealing end cover (121) is fixedly connected with the sealing connecting plate (112) through a screw member (120); a first sealing gasket (113), a first framework oil seal (114), a ventilation baffle ring (115), a second framework oil seal (116), a second sealing gasket (117) and a V-shaped rotary sealing ring (118) are sequentially sleeved on the main shaft (109); an air flow channel is arranged on the end cover (124) of the extrusion box body at the position corresponding to the air blocking ring (115), an air sealing channel (110) is arranged on the extrusion box body (102), and the air sealing channel (110) is communicated with the air flow channel.

3. The extrusion sealing structure of the high-tightness dry machine is characterized in that the lower extrusion sealing structure comprises a main shaft (109), an extrusion box body end cover (124), a front cover door bottom plate (123), a sealing end cover (121) and a sealing connecting plate (112), wherein the sealing end cover (121) is in threaded connection with the extrusion box body end cover (124), the extrusion box body end cover (124) is fixed on the lower extrusion box body (105), and the sealing end cover (121) is fixedly connected with the sealing connecting plate (112) through a screw member (120); a first sealing gasket (113), a first framework oil seal (114), a ventilation baffle ring (115), a second framework oil seal (116), a second sealing gasket (117) and a V-shaped rotary sealing ring (118) are sequentially sleeved on the main shaft (109); an air flow channel is arranged on the end cover (124) of the extrusion box body at the position corresponding to the air blocking ring (115), an air sealing channel (110) is arranged on the extrusion box body (102), and the air sealing channel (110) is communicated with the air flow channel.

4. The extrusion sealing structure of the high-tightness dry machine according to claim 2 or 3, characterized in that a sealing groove is formed on the surface of the sealing end cover (121) matched with the sealing connecting plate (112), and a first O-shaped sealing ring member (119) is arranged in the sealing groove.

5. The extrusion sealing structure of the high-tightness dry machine according to claim 2 or 3, characterized in that a sealing groove is formed on the joint surface of the sealing end cover (121) and the front cover door bottom plate (123), a second O-shaped sealing ring member (122) is arranged in the sealing groove, and the sealing groove is jointed between the two surfaces by the compression amount set by the second O-shaped sealing ring member (122).

6. The extrusion sealing structure of the high-tightness dry machine as claimed in claim 2 or 3, characterized in that a sealing groove is arranged on the end cover (124) of the extrusion box body outside the inlet of the air flow channel, and a third O-shaped sealing ring member (125) is arranged in the sealing groove to prevent the air from leaking.

7. The extrusion sealing structure of the high-tightness dry machine is characterized in that a sealing shaft sleeve (108) is arranged on the main shaft (109) and is positioned outside a sealing connecting plate (112).

8. The extrusion sealing structure of the high-tightness dry machine is characterized in that an inner hole of the V-shaped rotary sealing ring (118) is in interference fit with an outer circle of the main shaft (109), and a bevel edge of an end face of the V-shaped rotary sealing ring (118) is tightly attached to an end face of the sealing end cover (121).

9. The extrusion sealing structure of the high-tightness dry machine is characterized in that two holes on which the upper extrusion wheel (101) and the lower extrusion wheel (104) are positioned on the surface of the bottom plate (123) of the front cover door are respectively provided with a kidney-shaped hole, so that the second O-shaped sealing ring piece (122) is far away from the edge of the hole.

10. The extrusion sealing structure of the high-tightness dry machine is characterized in that 18 phi 4 air holes are uniformly distributed on the surface of the air venting baffle ring (115) for air venting.

Technical Field

The invention relates to the technical field of dry granulator sealing, in particular to a high-tightness dry granulator extrusion sealing structure.

Background

The extrusion sealing structure of the high-tightness dry-method granulator mainly comprises an extrusion box, an upper end cover, a lower end cover of the extrusion box, an upper end cover, a lower end cover, an upper connecting plate and a lower connecting plate which are connected with the end covers of the extrusion box.

When the material conveying device works, materials are conveyed forwards through the conveying mechanism, when the materials pass between the two extrusion wheels, the two extrusion wheels perform extrusion action on the materials, so that the upper box body of the extrusion box and related parts of the connected end cover need to move up and down simultaneously, and due to the fact that the upper box body and the related parts of the connected end cover move up and down, the abrasion loss can be increased, which is one of sealing risks; meanwhile, the relative rotation between the end cover framework oil seal of the extrusion box and the rotating shaft can influence the matching precision of the inner ring, and after gradual abrasion, the clearance is too large, so that the material can leak along the axial direction, which is the sealing risk II.

The extrusion sealing structure is a part of a dry granulator for producing antitumor drugs, when the dry granulator is in work or is cleaned, if the sealing performance of an extrusion part is not high, particles or liquid medicine generated in cleaning can be leaked, and the antitumor drugs are very toxic and can cause harm to human bodies and the environment, so that the dry granulator has high sealing performance requirement and cannot leak, and belongs to a highly-closed dry granulator.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the extrusion sealing structure of the high-tightness dry machine, which has reasonable structural design.

The technical scheme of the invention is as follows:

a high-tightness dry-method machine extrusion sealing structure comprises an extrusion part and a front cover door, wherein the extrusion part comprises an upper extrusion box body and a lower extrusion box body, and is characterized in that an upper air-tight quick connector is arranged on the upper extrusion box body; the lower extrusion box body is provided with a lower air sealing quick connector, a lower extrusion sealing structure is arranged in the lower extrusion box body, pressure air flow is introduced through the lower air sealing quick connector to enter the lower extrusion sealing structure, and materials are prevented from permeating through back blowing.

The extrusion sealing structure of the high-tightness dry machine is characterized by comprising a main shaft, an extrusion box body end cover, a front cover door bottom plate, a sealing end cover and a sealing connecting plate, wherein the sealing end cover is in threaded connection with the extrusion box body end cover, the extrusion box body end cover is fixed on an upper extrusion box body, and the sealing end cover is fixedly connected with the sealing connecting plate through a screw piece; the main shaft is sequentially sleeved with a first sealing gasket, a first framework oil seal, a ventilation baffle ring, a second framework oil seal, a second sealing gasket and a V-shaped rotary sealing ring; an air flow channel is arranged at the position, corresponding to the ventilating baffle ring, on the end cover of the extrusion box body, an air sealing channel is arranged on the extrusion box body, and the air sealing channel is communicated with the air flow channel.

The extrusion sealing structure of the high-tightness dry machine is characterized by comprising a main shaft, an extrusion box body end cover, a front cover door bottom plate, a sealing end cover and a sealing connecting plate, wherein the sealing end cover is in threaded connection with the extrusion box body end cover, the extrusion box body end cover is fixed on the lower extrusion box body, and the sealing end cover is fixedly connected with the sealing connecting plate through a screw piece; the main shaft is sequentially sleeved with a first sealing gasket, a first framework oil seal, a ventilation baffle ring, a second framework oil seal, a second sealing gasket and a V-shaped rotary sealing ring; an air flow channel is arranged at the position, corresponding to the ventilating baffle ring, on the end cover of the extrusion box body, an air sealing channel is arranged on the extrusion box body, and the air sealing channel is communicated with the air flow channel.

The extrusion sealing structure of the high-tightness dry machine is characterized in that a sealing groove is formed in the surface, matched with the sealing connecting plate, of the sealing end cover, and a first O-shaped sealing ring piece is arranged in the sealing groove.

The extrusion sealing structure of the high-tightness dry machine is characterized in that a sealing groove is formed in the joint surface of the sealing end cover piece and the front cover door bottom plate, a second O-shaped sealing ring piece is arranged in the sealing groove, and the sealing groove is jointed between the two surfaces through the compression amount set by the second O-shaped sealing ring piece.

The extrusion sealing structure of the high-tightness dry machine is characterized in that sealing grooves are respectively formed in two sides of an inlet of an air flow channel on an end cover of an extrusion box body, and a third O-shaped sealing ring piece is arranged in each sealing groove to prevent gas from leaking.

The extrusion sealing structure of the high-tightness dry machine is characterized in that a sealing shaft sleeve is arranged on the main shaft and positioned on the outer side of a sealing connecting plate.

The extrusion sealing structure of the high-tightness dry machine is characterized in that an inner hole of the V-shaped rotary sealing ring is in interference fit with an excircle of a main shaft, and the bevel edge of the end face of the V-shaped rotary sealing ring is tightly attached to the end face of the sealing end cover.

The extrusion sealing structure of the high-tightness dry machine is characterized in that two holes, where the upper extrusion wheel and the lower extrusion wheel are located, on the bottom plate surface of the front cover door are respectively in a kidney-shaped hole, so that the second O-shaped sealing ring piece is far away from the edge of the hole.

The extrusion sealing structure of the high-tightness dry machine is characterized in that 18 phi 4 air holes are uniformly distributed on the surface of the ventilation baffle ring and used for ventilation.

The invention has the beneficial effects that:

1) the air-tight sealing channel, the airflow channel and the air-tight baffle ring can extrude the box body upwards or extrude the box body downwards, and air flow with certain pressure is introduced into the box body, so that the material is prevented from permeating through back flushing, and the air-tight sealing effect is achieved.

2) The air-tight channel in the extrusion sealing structure is communicated with the air holes on the end cover of the extrusion box body and the ventilation retaining ring by the side surfaces of the upper extrusion box body and the lower extrusion box body, so that the structure is compact, and the space is reduced.

3) The V-shaped rotary sealing ring piece has the dual functions of axial sealing and end face sealing, and the nitrile rubber has the characteristics of high wear resistance, good oil resistance and good air tightness, can prevent dust, oil and water, is simple to install and is directly sleeved on a shaft.

Drawings

FIG. 1 is a schematic view of the overall structure of the dry granulator according to the present invention;

FIG. 2 is a schematic view of the structure of the extrusion part of the present invention;

FIG. 3 is a schematic view of the cross-sectional structure A-A of the present invention;

FIG. 4 is a schematic view of the cross-sectional structure B-B of the present invention;

FIG. 5 is a schematic view of the cross-sectional structure of C-C of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1-5, a high-tightness dry-method machine extrusion sealing structure comprises an extrusion component 1 and a front cover door 2; the extrusion part 1 comprises an upper extrusion box body 102 and a lower extrusion box body 105, an upper air sealing quick connector 107 is arranged on the side surface of the upper extrusion box body 102, an upper extrusion sealing structure is arranged in the upper extrusion box body 102, pressure air flow is introduced into the upper extrusion sealing structure through the upper air sealing quick connector 107, and materials are prevented from permeating through back blowing; the side surface of the lower extrusion box body 105 is provided with a lower air-tight quick connector 106, a lower extrusion sealing structure is arranged in the lower extrusion box body 104, and pressure airflow is introduced through the lower air-tight quick connector 106 to enter the lower extrusion sealing structure, so that the materials are prevented from permeating in a back blowing mode.

The upper extrusion sealing structure comprises a main shaft 109, an extrusion box body end cover 124, a front cover door bottom plate 123, a sealing end cover 121 and a sealing connecting plate 112, wherein the sealing end cover 121 is in threaded connection with the extrusion box body end cover 124, the extrusion box body end cover 124 is fixed on the upper extrusion box body 102, and the sealing end cover 121 is fixedly connected with the sealing connecting plate 112 through a screw piece 120; a first sealing gasket 113, a first framework oil seal 114, a ventilation baffle ring 115, a second framework oil seal 116, a second sealing gasket 117 and a V-shaped rotary sealing ring 118 are sequentially sleeved on the main shaft 109; an air flow channel is arranged on the extrusion box body end cover 124 at the position corresponding to the air blocking ring 115, an air sealing channel 110 is arranged on the extrusion box body 102, and the air sealing channel 110 is communicated with the air flow channel.

The lower extrusion sealing structure comprises a main shaft 109, an extrusion box body end cover 124, a front cover door bottom plate 123, a sealing end cover 121 and a sealing connecting plate 112, wherein the sealing end cover 121 is in threaded connection with the extrusion box body end cover 124, the extrusion box body end cover 124 is fixed on the lower extrusion box body 105, and the sealing end cover 121 is fixedly connected with the sealing connecting plate 112 through a screw piece 120; a first sealing gasket 113, a first framework oil seal 114, a ventilation baffle ring 115, a second framework oil seal 116, a second sealing gasket 117 and a V-shaped rotary sealing ring 118 are sequentially sleeved on the main shaft 109; an airflow channel is arranged on the extrusion box body end cover 124 at the position corresponding to the air blocking ring 115, an air-tight channel 110 is arranged on the extrusion box body 102, and the air-tight channel 110 is communicated with the airflow channel.

In this embodiment, a sealing end cover 121 of the upper and lower extrusion sealing structure is provided with a sealing groove on a matching surface with the sealing connection plate 112, and a first O-ring 119 is disposed in the sealing groove.

In this embodiment, a sealing groove is formed on a surface of the sealing end cap 121 of the upper and lower squeeze sealing structures, which is attached to the bottom plate 123 of the front cover door, and a second O-ring 122 is disposed in the sealing groove and attached to a gap between the two surfaces by a compression amount set by the second O-ring 122.

In this embodiment, sealing grooves are respectively formed on the two sides of the inlet of the air flow passage on the end cover 124 of the extrusion box body in the upper and lower extrusion sealing structures, and a third O-ring 125 is arranged in the sealing groove to prevent the air from leaking.

In the present embodiment, the main shaft 109 of the upper and lower squeeze sealing structures is provided with a sealing sleeve 108 on the outer side of the sealing connecting plate 112.

In this embodiment, the inner hole of the V-shaped rotary seal ring 118 in the upper and lower extrusion seal structure is in interference fit with the outer circle of the main shaft 109, and the oblique edge of the end face of the V-shaped rotary seal ring 118 is tightly attached to the end face of the seal end cover 121.

In the embodiment, the two holes on which the upper extrusion wheel 101 and the lower extrusion wheel 104 are located on the front cover door bottom plate 123 surface in the upper and lower extrusion sealing structures are waist-shaped holes, so that the second O-shaped seal ring piece 122 is far away from the hole edge.

In this embodiment, 18 phi 4 air holes are uniformly distributed on the surface of the air blocking ring 115 in the upper and lower extrusion sealing structures for ventilation.

The working principle is as follows:

the working principle of the high-sealing dry method is as follows: the material is conveyed between an upper extrusion wheel 101 and a lower extrusion wheel 104 by a conveying system, the extrusion wheels are driven by a speed reduction motor to drive the upper extrusion wheel and the lower extrusion wheel to rotate relatively through gear transmission, scrapers on two side surfaces of an upper scraper component 103 scrape the material adhered on two side surfaces of the upper extrusion wheel 101, the material is pressed into sheets through the two extrusion wheels, the sheets are crushed into small pieces through crushing knives in a crushing system, the small pieces fall into a secondary granule finishing system, and the required particle mesh number is prepared through secondary granule finishing; the extrusion force of the extrusion wheel and the power for the upper box body to move up and down are provided by a hydraulic lifting system on the piece drying machine; when the upper extrusion box 102 moves up and down, the components move up and down along with the upper extrusion box.

The working principle of the extrusion component is as follows: in operation, the speed reduction motor 111 drives the main shaft 109 in the lower extrusion box 105 to rotate, and the main shaft 109 in the upper extrusion box 102 is driven by a pair of meshed gears on the main shaft 109 in the lower extrusion box 105 and the main shaft 109 in the upper extrusion box 102 to rotate relatively, so as to drive the lower extrusion wheel 104 and the upper extrusion wheel 101 to rotate simultaneously.

The sealing principle of the extrusion sealing structure is as follows: the first sealing gasket 113 and the second framework oil seal 114 are used for sealing lubricating oil in the upper extrusion box body and the lower extrusion box body to permeate along the surface of the main shaft 109, and meanwhile, sealing materials and liquid medicine generated in cleaning permeate into the upper extrusion box body and the lower extrusion box body; the surface of the baffle ring 115 is uniformly distributed with 18 air holes with size phi 4 for introducing the air flow flowing in from the airtight passage member 110, the pressure of the air flow is 0.5bar, and the function of the introduced air flow is as follows: 1) when the second framework oil seal 116, the second sealing gasket 117, the V-shaped rotary sealing ring element 8 (end face position) and the sealing shaft sleeve 108 are abraded, materials in the front cover door of the granulating box can permeate between the sealing parts such as the second framework oil seal 116 and the like and the main shaft 109 along the surface of the main shaft of the element, so that abrasion between the sealing parts and the shaft can be aggravated, and the materials are prevented from permeating through back flushing due to the fact that air flow with certain pressure is introduced, namely, the air sealing effect is achieved; 2) this air current has the sealed function who detects second skeleton oil blanket, the sealed pad of second, V-arrangement rotary seal circle, when wearing and tearing appear in second skeleton oil blanket, the sealed pad of second, V-arrangement rotary seal circle, the air current pressure that lets in then can reduce, and the components and parts controlled by the procedure then can report to the police this moment to show that need change the sealing member, in order to keep normal sealed.

The V-shaped rotary seal ring piece 118 has double functions of axial seal and end face seal, and the material nitrile-butadiene rubber (NBR) has the characteristics of high wear resistance, good oil resistance and good air tightness, can prevent dust, oil and water, is simple to install and is directly sleeved on a shaft; the inner hole of the V-shaped rotary sealing ring piece 118 is in interference fit with the outer circle of the main shaft 109, and the V-shaped rotary sealing ring and the main shaft 109 rotate together during working without relative movement, so that the inner hole is not abraded; the bevel edge of the end face seal is tightly attached to the end face of the seal end cover 121, the roughness of the end face is 1.6, and the bevel edge of the end face of the V-shaped rotary seal ring 118 is ensured to have extremely small abrasion loss; because of its good elasticity and air tightness, the bevel edge of the V-shaped rotary seal ring 118 will naturally fall on the end face of the seal end cap 121 to maintain a sealed state, so as to prevent the infiltration of the materials outside the seal shaft sleeve 108, between the seal connecting plate 112 and the seal end cap 121, and the liquid medicine generated during cleaning.

The sealing sleeve 108 is used for sealing materials and cleaning chemicals to penetrate between the sealing part and the main shaft 109 from between the sealing connecting plate 112 and the main shaft 109 so as to avoid increasing abrasion. The sealing connecting plate 112 is connected with a sealing end cover 121 through a screw 120, and a sealing groove and a first O-shaped sealing ring piece 119 are arranged between the two matching surfaces for preventing materials and water from permeating; the sealing end cover 121 and the extrusion box body end cover 124 are in threaded connection to form a whole, and the second sealing gasket, the second framework oil seal, the ventilation baffle ring and the V-shaped rotary sealing ring are arranged in the inner cavities of the sealing end cover 121 and the extrusion box body end cover 124 to form a sealed chamber.

The sealing end cover 121 is attached to the surface of the front cover door bottom plate 123, a second sealing groove is arranged on the surface of the sealing end cover 121, a second O-shaped sealing ring is attached between the two surfaces through a set compression amount, and related parts such as a sealing part, the sealing end cover 121 and the like move up and down along with the upper box body without leakage; meanwhile, the left and right directions of two holes where the upper and lower squeezing wheels are located on the front cover door bottom plate 123 face are properly reduced, and the stroke of the upper box body is controlled in the vertical direction to form a waist-shaped hole, so that the second O-shaped sealing ring 122 is far away from the edge of the hole, and the sealing hidden trouble is avoided. The end cover 125 of the extrusion chamber is connected with the upper and lower extrusion chambers by screws, the air-tight passages 110 of the upper and lower extrusion chambers are integrally communicated with the vent holes of the respective end covers 124 of the extrusion chamber, a third sealing groove is formed on the mating surface of the end cover, and a third O-ring 125 is used for sealing the vent holes, which may cause leakage.

The upper and lower extrusion sealing structures are completely the same, back flushing materials are prevented from permeating, and the two-way sealing of the V-shaped rotary sealing ring, the framework oil seal and the sealing gasket are organically combined, so that the permeation of materials and liquid medicine generated during cleaning is prevented; sealing end covers and sealing groove structures on the end covers of the extrusion box body prevent materials and liquid medicine from seeping out; the extrusion component well guarantees each layer and each sealing of the upper and lower extrusion sealing structures, so that the high sealing function of the extrusion sealing structure of the dry granulator is realized.