CN109366736B - Rotary sealing device of mixer truck with non-fixed rotary shaft - Google Patents
Rotary sealing device of mixer truck with non-fixed rotary shaft Download PDFInfo
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- CN109366736B CN109366736B CN201811531455.0A CN201811531455A CN109366736B CN 109366736 B CN109366736 B CN 109366736B CN 201811531455 A CN201811531455 A CN 201811531455A CN 109366736 B CN109366736 B CN 109366736B
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- ring
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- barrel
- sealing cover
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/42—Apparatus specially adapted for being mounted on vehicles with provision for mixing during transport
- B28C5/4203—Details; Accessories
- B28C5/4262—Closures; Sealing mechanisms
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Accessories For Mixers (AREA)
Abstract
The invention discloses a rotary sealing device of a stirring truck with a non-fixed rotary shaft, which comprises a stirring barrel and a moving part, wherein a rotary sealing cover which rotates along with the stirring barrel is arranged on the stirring truck; a shifting ring is arranged on the outer wall of the feeding cylinder; the rotary sealing cover is pressed at the tail part of the stirring barrel by the moving part through the pressing mechanism. The invention breaks through the traditional thinking, eliminates the rotary supporting device, avoids the problems of component damage, leakage and the like caused by repeated positioning, reduces the later maintenance workload and reduces the cost.
Description
Technical Field
The invention relates to a rotary sealing device applied to a concrete mixer truck.
Background
The mixing drum of the traditional concrete mixing transport vehicle is open, and has the defects of poor weather resistance and driving safety, easy spillage, poor trafficability and the like. The applicant in 2010 puts forward the invention of a rotary sealing device for a mixing drum of a concrete mixing transport vehicle, which solves the problems at one time, and also has the problems of heavy device weight, large maintenance amount, more easily damaged parts, higher replacement cost and the like.
Patent publication number CN107344401a, hollow shaft rotary sealed concrete mixer truck filed on 29 of 2017, 08, solves the above-mentioned problems, but it brings new problems: the excircle of rotary seal lid with the agitator contacts, follows the agitator gyration, simultaneously, and rotary seal lid passes through rotary strutting arrangement and installs on removing the frame, and rotary seal lid is fixed a position by two sets of slewing mechanism promptly, however in practical application, the agitator can appear the subsidence of different degree under concrete gravity effect, and the mixer truck is unavoidable jolt in the process of traveling, and the axis of agitator and the axis of rotary support must not coincide, this just results in: (1) The sealing element between the stirring barrel and the rotary sealing cover and the rotary supporting device are stressed greatly and are easy to damage; (2) The closure of the rotary sealing cover can be influenced, leakage is easy to occur, and the sealing effect is influenced.
On the other hand, the slewing support is easy to enter sediment, so that the resistance is increased until the sediment is blocked, and the maintenance workload is large and the cost is high. However, the rotary supporting device is an essential important part of the concrete mixer truck, and the service environment of the mixer truck is difficult to improve.
Disclosure of Invention
The invention provides a rotary sealing device of a mixer truck with a non-fixed rotary shaft, which aims at: the problems of easy damage to parts, poor sealing effect and high maintenance cost are solved.
The technical scheme of the invention is as follows:
the stirring truck rotary sealing device of the non-fixed rotary shaft comprises a stirring barrel which is arranged on a truck body and can rotate relative to the truck body, and a moving part which is arranged on the truck body and can move relative to the truck body, wherein a rotary sealing cover is arranged, the outer edge of the rotary sealing cover is contacted with the outer edge of an outlet of the stirring barrel so that the rotary sealing cover rotates relative to the moving part along with the stirring barrel under the driving of the stirring barrel; the middle part of the rotary sealing cover is provided with a through hole; install the feeder hopper on the moving part, the exit of feeder hopper is connected with and passes the sealed lid through-hole of gyration and stretches into the feed cylinder of agitator, its characterized in that: the rotary sealing cover comprises a supporting ring positioned at the through hole, and a gap is formed between the supporting ring and the outer wall of the feeding cylinder, so that the supporting ring can move along the feeding cylinder, and the impact force generated when the mixer truck runs and jolts can be solved, thereby reducing the adverse effects on the sealing effect and the service life of components;
the flexible sealing mechanism is fixedly arranged on the supporting ring and is in contact with the feeding cylinder so as to realize the sealing between the rotary sealing cover and the feeding cylinder;
a shifting ring is arranged on the outer wall of the feeding cylinder and positioned at the front side of the supporting ring;
the rotary sealing cover is pressed at the tail part of the stirring barrel by the moving part through the pressing mechanism.
As a further improvement of the invention: the compressing mechanism is a transition ring, the transition ring is sleeved on the feeding cylinder, one end of the transition ring is contacted with the supporting ring, and the other end of the transition ring is contacted with the moving part;
or the pressing mechanism is a pressing wheel arranged on the moving part; the pinch roller is in contact with the support ring.
As a further improvement of the invention: the transition ring is in contact fit with the supporting ring through the conical surface, so that the centering effect of the rotary sealing mechanism is achieved.
As a further improvement of the invention: the sealing mechanism is a sealing inner ring, the sealing inner ring is fixedly arranged on the supporting ring, and the inner hole is contacted with the outer wall of the feeding barrel.
As a further improvement of the invention: the stirring barrel is internally provided with a central charging barrel, the central charging barrel rotates along with the stirring barrel, and the rear end of the central charging barrel is contacted with the front end face of the sealing inner ring or is provided with a gap with the front end face of the sealing inner ring.
As a further improvement of the invention: a central charging barrel is also arranged in the stirring barrel and rotates along with the stirring barrel; the sealing mechanism comprises a circumferential sealing ring and an end surface sealing ring, an inner hole of the circumferential sealing ring is in contact with the outer wall of the feeding cylinder, and the rear end of the central feeding cylinder is in contact with the front end surface of the end surface sealing ring.
As a further improvement of the invention: a baffle ring is arranged between the front side of the circumferential sealing ring and the supporting ring and the feeding cylinder, and the baffle ring has the function of pushing the cover sliding on the feeding cylinder to move backwards along with the moving part when the cover is opened.
As a further improvement of the invention: the movable part is provided with a guide hole, an electromagnet for adsorbing the rotary sealing cover is arranged in the guide hole, a compression spring is further arranged on the inner side of the guide hole, one end of the compression spring is connected with the movable part, and the other end of the compression spring is connected with the electromagnet and used for pushing the electromagnet to the rear side.
As a further improvement of the invention: the feeding cylinder is also sleeved with an annular rubber plate, the annular rubber plate is positioned at the front side of the shifting ring, the front end of the annular rubber plate is positioned at the front side of the front end of the feeding cylinder, and the inner wall of the rear part of the annular rubber plate is provided with a saw tooth ring, so that the annular rubber plate has the effect of carrying out sediment remained on the inner wall of the central charging basket when the moving part moves backwards.
Compared with the prior art, the invention has the following positive effects: (1) According to the invention, a rotary supporting device which plays a role in fixing and rotating is removed from a moving part and a rotary sealing cover, a flexible sealing inner ring is arranged between the rotary sealing cover and a feeding cylinder, a gap is reserved between a supporting ring of the rotary sealing cover and the feeding cylinder, the rotary sealing cover can move back and forth along the feeding cylinder relative to the moving part, and meanwhile, a compacting mechanism is utilized to ensure close contact between the rotary sealing cover and a stirring barrel, so that the rotary sealing cover moves along the movement of the stirring barrel as much as possible, and the problems of part damage, leakage and the like caused by repeated positioning are avoided; (2) Because the necessary rotary supporting device of the existing mixer truck is eliminated, the inertia thinking in the field is broken, the purposes of reducing the weight, the production cost and the workload and the cost of later maintenance are achieved, and a series of long-term unsolved problems surrounding the rotary supporting are solved; (3) When the transition ring contacts the supporting ring in a conical surface manner, the transition ring not only can provide forward thrust for the rotary sealing cover, but also can play a role in supporting and centering the rotary sealing cover, and can serve as a wear-and-tear piece to reduce wear of the supporting ring and the moving part; (4) When the compression wheel is used for applying pressure to the rotary sealing cover, the rotation of the rotary sealing cover cannot be influenced by the compression wheel when the rotary sealing cover moves along with the jolt of the stirring barrel; (5) An electromagnet device is adopted to hold the rotary sealing cover, so that the rotary sealing cover is ensured to normally open and close; (6) The stirring barrel structure with the central charging barrel adopts two fixed seals of a sealing outer ring of a barrel opening of the stirring barrel and a sealing inner ring of a barrel opening of the central barrel and rotary seal between the sealing inner ring and an outer circle of the charging barrel, so that the problem of rotary seal of the stirring barrel is well solved, and the maintenance amount is very small.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment.
Fig. 2 is a schematic structural diagram of a second embodiment.
Fig. 3 is a schematic structural diagram of the third embodiment.
Fig. 4 is a schematic structural diagram of the fourth embodiment.
Fig. 5 is a schematic structural diagram of a fifth embodiment.
Fig. 6 is a schematic structural diagram of a sixth embodiment.
Fig. 7 is a schematic structural diagram of an electromagnetic clamping mechanism in the first embodiment.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings:
example 1
Referring to fig. 1, a rotary sealing device of a mixer truck with a non-fixed rotary shaft, the mixer truck comprises a mixer drum which is arranged on a truck body and can rotate relative to the truck body, and a moving part 11 which is arranged on the truck body and can move relative to the truck body, a rotary sealing cover 1 is arranged, the outer edge of the rotary sealing cover 1 is contacted with the outer edge of an outlet of the mixer drum, and a sealing outer ring is arranged at the contact position, so that the rotary sealing cover 1 rotates relative to the moving part 11 along with the mixer drum under the driving of the mixer drum; the middle part of the rotary sealing cover 1 is provided with a through hole; the feeding hopper 2 is installed on the moving part 11, and a feeding barrel 4 penetrating through the through hole of the rotary sealing cover 1 and extending into the stirring barrel is connected to the outlet of the feeding hopper 2.
The rotary sealing cover 1 comprises a supporting ring 7 positioned at the through hole, a rubber wear-resistant ring is arranged on the inner circular surface of the supporting ring 7, and a gap is formed between the wear-resistant ring and the outer wall of the feeding cylinder 4, so that when the stirring barrel jolts or sinks, the rotary sealing cover 1 moves along with the stirring barrel and cannot interfere with mechanisms such as the feeding cylinder 4, the moving part 11 and the like; when the rotary seal cap 1 moves rearward out of contact with the agitator, the wear ring is in sliding contact with the feed cylinder 4.
In terms of sealing, a flexible sealing mechanism is fixedly arranged on the supporting ring 7, and the sealing mechanism is in contact with the feeding cylinder 4 to realize sealing between the rotary sealing cover 1 and the feeding cylinder 4.
Specifically, the sealing mechanism is a sealing inner ring 6, the sealing inner ring 6 is fixedly arranged on a supporting ring 7, and an inner hole is in contact with the outer wall of the feeding barrel 4. The elastic modulus of the seal inner ring 6 is lower than that of the seal outer ring, softer rubber or a seal ring with a seal leaf ring is adopted to form matching with the seal outer ring, the seal outer ring is a main seal, the main seal is pressed by the seal outer ring, the seal inner ring 6 is a sealing device with a small soft compression amount or a seal leaf ring for movable sealing, and the movement of the rotary seal cover 1 relative to the feeding cylinder 4 is not influenced.
When the central charging barrel 3 is arranged in the stirring barrel, the central charging barrel 3 rotates along with the stirring barrel, the rear end of the central charging barrel 3 is provided with a sealing flange, and the inner end of the sealing inner ring 6 is in contact with the sealing flange to realize the sealing between the charging barrel 4 and the central charging barrel 3.
A shifting ring 8 is fixedly arranged on the outer wall of the feeding barrel 4, and the shifting ring 8 is positioned on the front side of the supporting ring 7. A gap is formed between the shifting ring 8 and the supporting ring 7, and the gap is large enough to ensure the compression of the rotary sealing cover 1.
At the front end of the shifting ring 8, an annular rubber plate 14, which is now commonly used, can be used to prevent concrete from spilling along the gap between the feed cylinder 4 and the central feed cylinder 3. The front end of the annular rubber plate 14 is positioned at the front side of the front end of the feeding cylinder 4. Further, a transverse sawtooth ring or wire brush may be added to the rear part of the annular rubber plate 14 near the dial ring 8 for carrying out concrete and sand in the central cylinder 3 when the moving mechanism is retreated.
The rotary sealing cover 1 is pressed at the tail part of the stirring barrel by the moving part 11 through the pressing mechanism.
Specifically, the hold-down mechanism is transition ring 5, the cross sectional shape of transition ring 5 and support ring 7 is the rectangle, and transition ring 5 suit is on feed cylinder 4, and preceding terminal surface contacts with the terminal surface behind support ring 7, the terminal surface with moving part 11 or feeder hopper 2 contact. The transition ring 5 is positioned outside the rotary sealing cover 1 and is a wearing piece convenient to replace.
The moving part 11 can be a moving frame body, a moving plate or other structural forms, and is in sliding connection with the vehicle body through a sliding rail or other guiding mechanisms, an oil cylinder or an air cylinder is arranged on the vehicle body, the moving part 11 moves back and forth relative to the vehicle body under the driving of the oil cylinder or the air cylinder, and the moving part 11, the feed hopper 2, the feed cylinder 4 and the shifting ring 8 form a fixedly connected whole. When the moving part 11 moves forwards, a pressing plate or a beam device at the front end of the moving part 11 can be contacted with the transition ring 5, so that the transition ring 5 is pressed against the rotary sealing cover 1; when the moving part 11 moves backwards, the feed hopper 2, the feed cylinder 4 and the shifting ring 8 synchronously move backwards, the shifting ring 8 contacts with the supporting ring 7, and the supporting ring 7 is pushed backwards, so that the rotary sealing cover 1 is separated from the stirring barrel, and the rotary sealing cover 1 moves to open and close.
Further, as shown in fig. 7, a guiding hole may be further formed in the moving member 11, an electromagnet 10 for adsorbing the rotary seal cover 1 is installed in the guiding hole, a compression spring 12 is further installed inside the guiding hole, one end of the compression spring 12 is connected with the moving member 11, and the other end of the compression spring is connected with the electromagnet 10, so as to push the electromagnet 10 to the rear side away from the rotary seal cover 1, thereby avoiding friction and damage between them. The front end of the electromagnet 10 is an electromagnetic action block, and the rear part is a guide rod. When the rotary sealing cover 1 needs to be opened, the stirring barrel stops rotating, the electromagnet 10 is electrified, the compression spring 12 is compressed, the electromagnet 10 stretches out and is adsorbed on the rotary sealing cover 1, then the moving part 11 acts under the action of the oil cylinder, and the rotary sealing cover 1 is opened by means of the holding force of the electromagnet 10. After the rotary sealing cover 1 is closed, the electromagnet 10 is powered off, the compression spring 12 retracts the electromagnet 10, and the rotary sealing cover 1 is pressed on the stirring barrel by the pressing mechanism and rotates along with the stirring barrel.
Example two
As shown in fig. 2, this embodiment differs from the first embodiment in that there is a gap between the rear end of the center cylinder 3 or the front end surface of the seal inner ring 6.
Example III
As shown in fig. 3, the difference between this embodiment and the first embodiment is that the sealing mechanism is not an integral sealing inner ring 6, but a split structure, including a circumferential sealing ring 61 and an end sealing ring 62, wherein the inner hole of the circumferential sealing ring 61 is in contact with the outer wall of the feed cylinder 4, and the rear end of the central feed cylinder 3 is in contact with the front end face of the end sealing ring 62.
Example IV
As shown in fig. 4, this embodiment is a further improvement on the basis of the third embodiment: a baffle ring 13 is arranged at the front side of the circumferential sealing ring 61 and between the supporting ring 7 and the feeding cylinder 4, and gaps are arranged at the inner circle and the outer circle of the baffle ring 13 for preventing concrete from entering the circumferential sealing ring 61.
Example five
As shown in fig. 5, the difference between the embodiment and the first embodiment is that the cross-sectional shapes of the transition ring 5 and the supporting ring 7 are right trapezoid, and the two are in contact fit through the conical surface, so that the transition ring 5 not only can provide forward thrust for the rotary sealing cover 1, but also can play a role in supporting the rotary sealing cover 1.
Example six
As shown in fig. 6, the present embodiment is different from the third embodiment in that the pressing mechanism is a pressing wheel 9 mounted on a moving member 11; the pinch roller 9 is in contact with the support ring 7.
The pressing mechanism may also be other devices such as balls pressed on the rotary seal cover 1 for transmitting axial pressure.
When the moving part 11 moves forwards, the pressing wheel 9 presses the rotary sealing cover 1 to be in close contact with the stirring barrel, and meanwhile, the position of the rotary sealing cover 1 is not limited, so that the rotary sealing cover 1 is in a relative floating state relative to the moving part 11, and the rotation and movement of the rotary sealing cover are prevented from being disturbed. When the moving member 11 moves backward, the dial ring 8 contacts the support ring 7, and the rotary seal cover 1 is pushed backward to be opened.
Furthermore, if necessary, the back side of the supporting ring 7 may be provided with a ring rail, the pressing wheel 9 is matched with the ring rail, and a proper gap is left at the matched position, so that on one hand, the rotation of the floating rotary sealing cover 1 is not affected, and on the other hand, a certain guiding effect is provided.
It is obvious that the sealing mechanism in this embodiment may also employ the sealing inner ring 6 similar to that of the first embodiment.
Claims (8)
1. The stirring truck rotary sealing device of the non-fixed rotary shaft comprises a stirring drum which is arranged on a truck body and can rotate relative to the truck body and a moving part (11) which is arranged on the truck body and can move relative to the truck body, wherein a rotary sealing cover (1) is arranged, the outer edge of the rotary sealing cover (1) is contacted with the outer edge of an outlet of the stirring drum so that the rotary sealing cover (1) rotates relative to the moving part (11) along with the stirring drum under the driving of the stirring drum; the middle part of the rotary sealing cover (1) is provided with a through hole; install feeder hopper (2) on moving part (11), the exit of feeder hopper (2) is connected with and passes rotary seal lid (1) through-hole and stretches into feed cylinder (4) of agitator, its characterized in that: the rotary sealing cover (1) comprises a supporting ring (7) positioned at the through hole, and a gap is reserved between the supporting ring (7) and the outer wall of the feeding barrel (4);
a flexible sealing mechanism is fixedly arranged on the supporting ring (7), and the sealing mechanism is contacted with the feeding cylinder (4) to realize the sealing between the rotary sealing cover (1) and the feeding cylinder (4);
a shifting ring (8) is arranged on the outer wall of the feeding cylinder (4), and the shifting ring (8) is positioned at the front side of the supporting ring (7);
the rotary sealing cover (1) is pressed at the tail part of the stirring barrel by the moving part (11) through the pressing mechanism.
2. The non-stationary rotary shaft rotary seal assembly for a mixer truck of claim 1 wherein: the sealing mechanism is a sealing inner ring (6), the sealing inner ring (6) is fixedly arranged on the supporting ring (7), and the inner hole is contacted with the outer wall of the feeding barrel (4).
3. The non-stationary rotary shaft rotary seal assembly for a mixer truck of claim 2 wherein: the stirring barrel is internally provided with a central charging barrel (3), the central charging barrel (3) rotates along with the stirring barrel, and the rear end of the central charging barrel (3) is contacted with the front end face of the sealing inner ring (6) or is provided with a gap with the front end face of the sealing inner ring (6).
4. The non-stationary rotary shaft rotary seal assembly for a mixer truck of claim 1 wherein: a central charging barrel (3) is further arranged in the stirring barrel, and the central charging barrel (3) rotates along with the stirring barrel; the sealing mechanism comprises a circumferential sealing ring (61) and an end surface sealing ring (62), wherein an inner hole of the circumferential sealing ring (61) is in contact with the outer wall of the feeding barrel (4), and the rear end of the central feeding barrel (3) is in contact with the front end surface of the end surface sealing ring (62).
5. The rotary seal device for a mixer truck with a non-stationary rotary shaft as set forth in claim 4, wherein: a baffle ring (13) is arranged between the front side of the circumferential sealing ring (61) and the feeding cylinder (4) and between the supporting ring (7).
6. The non-stationary rotary shaft rotary seal assembly for a mixer truck of claim 1 wherein: the movable part (11) is provided with a guide hole, an electromagnet (10) for adsorbing the rotary sealing cover (1) is arranged in the guide hole, a compression spring (12) is further arranged at the inner side of the guide hole, one end of the compression spring (12) is connected with the movable part (11), and the other end of the compression spring is connected with the electromagnet (10) and used for pushing the electromagnet (10) to the rear side.
7. A mixer truck swivel seal assembly of a non-stationary swivel shaft as claimed in any one of claims 1 to 6 wherein: the feeding cylinder (4) is further sleeved with an annular rubber plate (14), the annular rubber plate (14) is located at the front side of the shifting ring (8), and the front end of the annular rubber plate (14) is located at the front side of the front end of the feeding cylinder (4).
8. The non-stationary rotary shaft rotary seal assembly for a mixer truck of claim 7 wherein: the rear part of the annular rubber plate (14) is also provided with saw teeth.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811531455.0A CN109366736B (en) | 2018-12-14 | 2018-12-14 | Rotary sealing device of mixer truck with non-fixed rotary shaft |
| PCT/CN2019/119051 WO2020119390A1 (en) | 2018-12-14 | 2019-11-18 | Rotary sealing apparatus for non-fixed rotary axis concrete mixer vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811531455.0A CN109366736B (en) | 2018-12-14 | 2018-12-14 | Rotary sealing device of mixer truck with non-fixed rotary shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109366736A CN109366736A (en) | 2019-02-22 |
| CN109366736B true CN109366736B (en) | 2023-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811531455.0A Active CN109366736B (en) | 2018-12-14 | 2018-12-14 | Rotary sealing device of mixer truck with non-fixed rotary shaft |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109366736B (en) |
| WO (1) | WO2020119390A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109366736B (en) * | 2018-12-14 | 2023-08-01 | 烟台盛利达工程技术有限公司 | Rotary sealing device of mixer truck with non-fixed rotary shaft |
| CN110103339B (en) * | 2019-06-12 | 2024-02-20 | 烟台盛利达工程技术有限公司 | Spiral-compressed clutch type rotary sealing mechanism |
| CN110202695B (en) * | 2019-07-01 | 2023-12-29 | 盛镝 | Portable rotary sealing mechanism |
| CN111546496A (en) * | 2020-05-13 | 2020-08-18 | 山东精砼工程机械股份有限公司 | Lightweight maintenance-free rotary sealing device |
| CN112497503A (en) * | 2020-11-12 | 2021-03-16 | 山东精砼工程机械股份有限公司 | Rotary sealing mechanism for fixing central cylinder of stirring barrel |
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| JP2003185026A (en) * | 2001-12-13 | 2003-07-03 | Kitagawa Iron Works Co Ltd | Shaft seal structure of concrete mixer |
| CN201960667U (en) * | 2010-12-15 | 2011-09-07 | 中铁五局（集团）有限公司 | Shaft head sealing device of concrete slurry conveying vehicle |
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| GB2503218B (en) * | 2012-06-19 | 2014-07-30 | Brinsley Mcfarlane | Improved manhole cover for mixer drum |
| CN105365047B (en) * | 2015-11-06 | 2017-06-06 | 湖南汽车制造有限责任公司 | Sealing device and it is equiped with the trucd mixer of the sealing device |
| CN107344401B (en) * | 2017-08-29 | 2019-03-29 | 烟台盛利达工程技术有限公司 | The concrete mixing and transporting car of hollow shaft rotary sealing |
| CN107584672A (en) * | 2017-09-18 | 2018-01-16 | 莱州亚通重型装备有限公司 | A kind of multi-disc type rotary sealing system of concrete mixing and transporting car |
| CN108724465A (en) * | 2018-08-20 | 2018-11-02 | 烟台盛利达工程技术有限公司 | Inside and outside sleeve screw seal device |
| CN109366736B (en) * | 2018-12-14 | 2023-08-01 | 烟台盛利达工程技术有限公司 | Rotary sealing device of mixer truck with non-fixed rotary shaft |
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2018
- 2018-12-14 CN CN201811531455.0A patent/CN109366736B/en active Active
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2019
- 2019-11-18 WO PCT/CN2019/119051 patent/WO2020119390A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003185026A (en) * | 2001-12-13 | 2003-07-03 | Kitagawa Iron Works Co Ltd | Shaft seal structure of concrete mixer |
| CN201960667U (en) * | 2010-12-15 | 2011-09-07 | 中铁五局（集团）有限公司 | Shaft head sealing device of concrete slurry conveying vehicle |
| CN102310483A (en) * | 2011-09-27 | 2012-01-11 | 三一重工股份有限公司 | Device for sealing material of mixing drum and agitating truck |
| CN203374817U (en) * | 2013-07-23 | 2014-01-01 | 南通四建装饰工程有限公司 | Double-way back pressure type taper sleeve shaft-end sealing device of horizontal type mortar mixer |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2020119390A1 (en) | 2020-06-18 |
| CN109366736A (en) | 2019-02-22 |
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