WO2021203943A1

WO2021203943A1 - Oscillating rotary sealing system

Info

Publication number: WO2021203943A1
Application number: PCT/CN2021/081729
Authority: WO
Inventors: 盛镝
Original assignee: 烟台盛利达工程技术有限公司
Priority date: 2020-04-10
Filing date: 2021-03-19
Publication date: 2021-10-14
Also published as: CN111283874A

Abstract

Disclosed is an oscillating rotary sealing system, comprising a mixing tank and a sealing cover. The mixing tank is connected to the sealing cover by means of a rotary sealing device. A mixer truck further comprises a stopping mechanism for preventing the sealing cover from rotating together with the mixing tank. When the stopping mechanism is in a braking position, the sealing cover is stationary relative to a truck body of the mixer truck; when the stopping mechanism is in a non-braking position, the sealing cover is driven by the rotary sealing device to rotate together with the mixing tank. The oscillating rotary sealing system further comprises a feeding hopper fixedly mounted on the truck body. A discharging hole is further provided on the sealing cover. In the invention, an oscillating structure controls the position of the discharging hole. When the discharging hole moves together with the sealing cover to a top portion, the sealing cover is closed to achieve rotary sealing so as to prevent spilling. Feeding is performed by means of the feeding hopper. The discharging hole has only the functions of ventilation and gas discharging. When the discharging hole moves together with the sealing cover to a bottom portion, rotary sealing is released so as to perform discharging. The invention has a simple structure, is light, and allows a material to be fed and discharged easily.

Description

Swing type rotary sealing system

Technical field

The invention relates to a rotary sealing system for the mixing barrel of a concrete mixer truck, and can also be used in other rotary sealing occasions.

Background technique

The open structure of the concrete mixer tank is one of the defects of the concrete mixer, causing many problems: concrete heat preservation and moisture retention is not good, heat dissipation is fast, energy saving is poor, the quality of concrete is poor, which is not conducive to meeting the requirements of high-quality social development; The bucket tilt angle is too large, resulting in poor concrete quality and driving safety and passing performance; due to the open mouth, the concrete is also easy to spill, which not only pollutes the environment, affects driving safety, but also causes a waste of resources, which is not in line with the modern and future four sections. 1. Environmental protection and green construction requirements.

In order to overcome the above-mentioned problems, the prior art proposes a rotary sealing device, but it has problems such as complex structure and heavy weight.

technical problem

The invention proposes a swing type rotary sealing system, and its purpose is to simplify the structure of the rotary sealing at the tail of the mixing barrel and the feeding and discharging mechanism, reduce the weight, and simplify the feeding and discharging operation.

Technical solutions

The technical scheme of the present invention is as follows:

A swing type rotary sealing system, comprising a mixing bucket installed on the body of a mixer truck and a sealing cover located on the rear side of the mixing bucket, wherein the mixing bucket is connected with the sealing cover through a rotating sealing device;

The mixer truck also includes a stop mechanism for preventing the sealing cover from rotating with the mixing drum. When the stop mechanism is in the braking position, the sealing cover is stationary relative to the body of the mixer truck. When the stop mechanism is in the non-braking position When the sealing cover is driven by the rotary sealing device, it rotates together with the mixing barrel;

It also includes a feed hopper fixedly installed on the vehicle body, the front end of the feed hopper passes through the central hole on the sealing cover and is located inside the mixing tank;

The sealing cover is also provided with a discharge hole.

As a further improvement of the system: the feeding hopper is connected with the central hole of the sealing cover through a slewing ring.

As a further improvement of the system: the rear end surface of the sealing cover is also installed with sealing tapes located on the left and right sides of the discharge hole, and the rear end of the sealing tape is used to contact the front end surface of the upper part of the hopper; One end of the sealing belt close to the axis of the mixing barrel is connected with the rotating ring.

As a further improvement of the system: the upper front end surface of the hopper is provided with a sealing plate for contact with the rear end of the sealing belt.

As a further improvement of the system: the stop mechanism includes bosses arranged on the left and right sides of the sealing cover and stoppers arranged on the sealing cover, and the bosses are used to block the stoppers to prevent the sealing cover from following the stirring. The barrel turns.

As a further improvement of the system: the discharge hole has a fan ring shape, and the center of the fan ring part coincides with the center of the sealing cover;

or,

The discharging hole is fan-shaped, the circle center of the fan-shaped part coincides with the circle center of the sealing cover, and a stop belt is provided at the junction of the fan-shaped linear part and the revolving ring.

As a further improvement of the system: the rotary sealing device includes a ring rail arranged at the rear of the mixing tank, and the inner edge of the ring rail is in contact with or with the outer circular surface of the middle part of the cylindrical part at the rear of the mixing tank. The rear end of the mixing tank is connected, and the ring rail is located on the front side of the sealing cover;

The rotary sealing device also includes a connecting ring installed at the front end of the sealing cover and sleeved on the outer side of the ring rail, and a fixed ring installed at the front end of the connecting ring and located on the front side of the ring rail; the ring rail is located at the connecting ring and the fixed ring. In the enclosed annular space, the ring rail is slidingly matched with the connecting ring and the fixed ring, and an annular sealing mechanism is also arranged in the annular space.

As a further improvement of the system: when the inner edge of the ring rail is in contact with the middle outer circular surface of the cylindrical part at the rear of the mixing barrel, the sealing mechanism in the annular space is a sealing ring; The front end surface is in contact with the rear end surface of the fixed ring, and the rear end surface of the ring rail is in contact with the front end surface of the sealing ring; an annular groove is provided inside the front end of the connecting ring, and the outer edge of the ring rail is located in the annular groove The sealing ring is located in the space enclosed by the ring rail, the cylindrical part at the end of the mixing tank, the sealing cover and the connecting ring;

When the inner edge of the ring rail is connected to the rear end of the mixing barrel, the sealing mechanism in the annular space includes a sealing ring and a sealing ring; the cross-sectional shape of the sealing ring is L-shaped, including a ring part and a front end and a ring The cylindrical part where the inner edges of the ring-shaped part meet; the front end surface of the ring rail is in contact with the rear end surface of the fixed ring, and the rear end surface of the ring rail is in contact with the front end surface of the ring part; the front end of the connecting ring is provided inside There is an annular groove, the outer edge of the ring rail and the annular part are all located in the annular groove; the sealing ring is located in the space enclosed by the annular part, the cylindrical part, the sealing cover and the connecting ring.

As a further improvement of the system: a gap is left between the outer circular surface of the sealing ring and the connecting ring, a wedge-shaped compression ring is installed in the gap, and the back end of the compression ring is in contact with the sealing cover .

As a further improvement of the system: the top of the connecting ring is also provided with a lubricant cavity, and the lubricant cavity communicates with the annular groove.

Beneficial effect

Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention realizes swing-type rotary sealing and feeding and discharging. When the discharging hole moves to the top with the sealing cover, the feeding hopper can be used for feeding and discharging. The material hole plays the role of ventilation and exhaust. When the material hole moves to the bottom with the sealing cover, the material can be discharged. The structure is simple, the weight is light, and the operation of feeding and discharging is convenient; (2) The sealing can be conveniently controlled by the stop mechanism The stop position of the cover realizes the switching of the feeding and discharging state; (3) During transportation and feeding, the sealing tape can prevent the concrete from spilling, and when the material is discharged, it can prevent the concrete from splashing. The role of the retaining belt is to prevent overflow. When it is located below, it plays the role of preventing the splash of the discharge, and the role of the stop belt is to prevent the splash of the discharge; (4) The present invention integrates the slewing support and the slewing seal, which not only simplifies the structure, but also reduces the weight. At the same time, it is convenient for operation and maintenance, and also improves the reliability of the system; (5) The sealing device is connected to the mixing drum, which reduces external force damage to the seal caused by vehicle bumps and mixing drum deformation, reduces wear and reduces movement Resistance; (6) The lubrication of the connecting ring as the slewing support and the sealing ring and the sealing ring as the slewing seal can be completed in one cavity. At the same time, because the lubricant first lubricates the connecting ring, and then the sealing ring, The sealing ring is lubricated, so that the sealing ring can act as a rotary oil seal at the same time as a seal. It can achieve multiple goals, simplifying the structure, increasing the function, improving the efficiency, and reducing the spillage of the lubricant; (7) ) The rotary seal device can rotate with the mixing barrel to reduce the wear of the rotary seal; (8) The mud in the mixing barrel that penetrates through the sealing ring and penetrates into the rotary support will gather and discharge in the lubricant cavity and will not spill over and pollute the environment. , Completely solve the problem of transportation leakage.

Description of the drawings

Figure 1 is a rear view in the feeding state.

Figure 2 is a side view of the feeding state, in which a cross-sectional view of the mixing barrel and the rotary sealing device is carried out.

Figure 3 is a rear view in the discharging state.

Figure 4 is a side view of the discharging state, in which a section of the mixing barrel and the rotary sealing device is carried out.

Fig. 5 is a schematic diagram of the structure of the rotary sealing device in the first embodiment.

Fig. 6 is a schematic diagram of the structure of the rotary sealing device in the second embodiment.

The best mode of the present invention

实施例一Example one

As shown in Figures 1 to 4, a swing type rotary sealing system includes a mixing tank 1 installed on the body of the mixer truck and a sealing cover 3 located on the rear side of the mixing tank 1. The sealing cover 3 is connected.

The system also includes a feed hopper 4 fixedly installed on the vehicle body. The cylindrical discharge port at the front end of the feed hopper 4 passes through the central hole on the sealing cover 3 and is located inside the mixing tank 1; The hopper 4 is connected with the center hole of the sealing cover 3 through a revolving ring 6. The slewing ring 6 and the sealing cover 3 can be a soft connection or a hard connection. The slewing ring 6 can be made of rubber or fiber materials, or can be an annular sealing mechanism made of elastic or soft materials. The outer circle of the sealing cover 3 is connected with the rotary sealing device 2. The upper front end of the hopper 4 is a closed vertical plate.

The sealing cover 3 is also provided with a discharge hole 10. The discharge hole 10 has a fan ring shape, and the center of the fan ring part coincides with the center of the sealing cover 3; or, the discharge hole 10 has a fan shape, and the center of the fan shape coincides with the center of the sealing cover 3; or, In order to enlarge or reduce the discharge hole 10, the circle center of the fan-shaped part and the center of the sealing cover 3 may not overlap; a soft stop belt 11 is provided at the junction of the fan-shaped part and the slewing ring 6 to reduce the area of the discharge hole 10 , To prevent the concrete from overflowing during the feeding and transportation, and also to prevent the concrete from splashing during the discharging.

The mixer truck also includes a stop mechanism for preventing the sealing cover 3 from following the rotation of the mixing drum 1. When the stop mechanism is in the braking position, the sealing cover 3 is stationary relative to the body of the mixer truck. In the braking position, the sealing cover 3 is driven by the rotary sealing device 2 to follow the mixing tank 1 to rotate together.

The stop mechanism includes bosses 9 provided on the left and right sides of the sealing cover 3 and stoppers 8 provided on the sealing cover 3. The bosses 9 are used to block the stoppers 8 to prevent the sealing cover 3 from following the stirring. Barrel 1 rotates.

In this embodiment, the bosses 9 are fixedly arranged, and are respectively arranged on both sides of the sealing cover 3. As shown in Figures 1 and 2, when one side of the boss 9 is in contact with the stopper 8, the discharge hole 10 is located above and is in a feeding or transportation state. As shown in Figures 3 and 4, when the boss 9 on the other side is in contact with the stopper 8, the discharging hole 10 is located below and in a discharging state. The boss 9 can also be changed to a movable type according to needs, and its position can be controlled manually, by air cylinders, or oil cylinders.

As shown in Figures 1 to 4, the rear end surface of the sealing cover 3 is also equipped with soft sealing tapes 5 on the left and right sides of the discharge hole 10. Contact with the front end face. The end of the sealing belt 5 close to the axis of the mixing tank 1 is connected with the rotating ring 6. The sealing tape 5 is used to seal the gap between the linear section of the feed hole on the feed hopper 4 and the sealing cover 3, so that the feed hopper 4 and the sealing cover 3 can move with each other or be sealed by contact.

Further, the upper front end surface of the hopper 4 is provided with a sealing plate 7 for contacting the rear end of the sealing band 5 to increase the contact area. Stop bands 11 are also provided on both sides of the fan-shaped hole 10.

At the upper front end of the hopper 4, near the sealing cover 3, a cover plate for rain and splash prevention is also provided.

As shown in Fig. 5, the structure of the rotary sealing device 2 is as follows: includes a ring rail 2-3 arranged at the rear of the mixing tank 1, and the inner edge of the ring rail 2-3 is cylindrical The outer circular surfaces of part of the middle part are connected, and the ring rails 2-3 are located on the front side of the sealing cover 3.

The rotary sealing device 2 also includes a connecting ring 2-2 installed at the front end of the sealing cover 3 and sleeved outside the ring rail 2-3, and a connecting ring 2-2 installed at the front end of the connecting ring 2-2 and located on the front side of the ring rail 2-3. Fixed ring 2-1. The fixed ring 2-1 is a split type, which is formed by splicing more than two sets of arc-shaped fixed rings, which is convenient for disassembly and assembly.

The ring rail 2-3 is located in the annular space enclosed by the connecting ring 2-2 and the fixed ring 2-1, and the ring rail 2-3 is slidingly fitted with the connecting ring 2-2 and the fixed ring 2-1.

An annular sealing mechanism is also provided in the above-mentioned annular space. The sealing mechanism is a sealing ring 2-6; the sealing ring 2-6 is made of fiber or elastic material, and the cross-sectional shape is square or rectangular, which is one or more groups.

The front end surface of the ring rail 2-3 is in contact with the rear end surface of the fixed ring 2-1, and the rear end surface of the ring rail 2-3 is in contact with the front end surface of the sealing ring 2-6; the connecting ring 2-2 The inner side of the front end is provided with an annular groove, and the outer edges of the ring rail 2-3 are all located in the annular groove; the sealing ring 2-6 is located on the ring rail 2-3, the cylindrical part at the end of the mixing tank 1, and the sealing cover 3. And the space enclosed by the connecting ring 2-2.

The connecting ring 2-2 and the fixed ring 2-1 jointly define the position of the ring rail 2-3, which has the effect of slewing support. The sealing ring 2-6 also plays a role in sealing the gap between the connecting ring 2-2 and the ring rail 2-3.

Embodiments of the present invention

The second embodiment: The difference between this embodiment and the first embodiment is mainly in the structure of the rotary sealing device 2:

The inner edge of the ring rail 2-3 is connected with the rear end of the mixing tank 1. The sealing mechanism in the annular space includes a sealing ring 2-5 and a sealing ring 2-6; the cross-sectional shape of the sealing ring 2-5 is L-shaped, including an annular part and a cylindrical shape whose front end is connected to the inner edge of the annular part Part; the front end surface of the ring rail 2-3 is in contact with the rear end surface of the fixed ring 2-1, and the rear end surface of the ring rail 2-3 is in contact with the front end surface of the ring part; the connecting ring 2-2 The inner side of the front end is provided with an annular groove, and the outer edge of the ring rail 2-3 and the annular part are located in the annular groove; the sealing ring 2-6 is located in the annular part, the cylindrical part, the sealing cover 3 and the connecting ring In the space enclosed by 2-2.

Further, a wedge-shaped compression ring 2-7 is installed in the gap between the sealing ring 2-6 and the connecting ring 2-2, and the rear end of the compression ring 2-7 is connected to the sealing cover 3 To contact. The compression ring 2-7 is wedged between the sealing ring 2-6 and the connecting ring 2-2, and the sealing ring 2-6 can be compressed to enhance the sealing effect. A series of compression rings 2-7 with different thicknesses can be set. When the sealing rings 2-6 are continuously worn and thinned, the sealing effect will become worse. Replace the thicker compression rings 2-7 in time to restore the sealing effect, which is convenient for maintenance. . The compression ring 2-7 can also be in the form of a ring pad, a tension band, and other structures. The compression ring 2-7 preferentially use materials that will not deteriorate in contact with water or oil, or other materials that will swell in contact with lubricating media.

A lubricant cavity is also opened on the top of the connecting ring 2-2, and the lubricant cavity communicates with the annular groove. A cover is provided on the top of the lubricant cavity, and a lubricant tube 2-8 for injecting lubricating medium into the lubricant cavity is also provided. The lubricant first lubricates the connecting ring 2-2 and the ring rail 2-3, and then lubricates the seal ring 2-5 and the seal ring 2-6, and at the same time acts as an oil seal for the slewing support system. In addition to lubricating the rotary seal system, the lubricant will also accumulate in the rotary seal cavity and play a sealing role with the sealing ring 2-6. Doing multiple things in this way not only simplifies the structure, improves the sealing effect, increases the efficiency, but also reduces the spillage of the lubricant.

On the other hand, since deposits of infiltrated concrete slurry tend to accumulate in the cavity of the slewing support and the rotary seal, these deposits will accumulate in the lubricant cavity. A box containing lubricant can be added to the lubricant cavity. Lubricant pipes 2-8 are connected to this box, which is easy to disassemble as a whole, and it is convenient to disassemble the box without cleaning the deposits inside.

Claims

A swing type rotary sealing system, which is characterized in that it comprises a mixing tank (1) installed on the body of the mixer truck and a sealing cover (3) located on the rear side of the mixing tank (1). The mixing tank (1) Connect with the sealing cover (3) through a rotary sealing device (2);

The mixer truck also includes a stop mechanism for preventing the sealing cover (3) from rotating with the mixing drum (1). When the stop mechanism is in the braking position, the sealing cover (3) is stationary with respect to the body of the mixer truck. When the stop mechanism is in the non-braking position, the sealing cover (3) is driven by the rotary sealing device (2) to follow the mixing tank (1) to rotate together;

It also includes a feed hopper (4) fixedly installed on the vehicle body, the front end of the feed hopper (4) passes through the central hole on the sealing cover (3) and is located inside the mixing tank (1) ；

The sealing cover (3) is also provided with a discharge hole (10).
The oscillating rotary sealing system according to claim 1, characterized in that: the feed hopper (4) is connected with the central hole of the sealing cover (3) through a slewing ring (6).
The swing type rotary sealing system according to claim 2, characterized in that: the rear end surface of the sealing cover (3) is also equipped with sealing bands (5) located on the left and right sides of the discharge hole (10), so The rear end of the sealing belt (5) is used to contact the front end surface of the upper part of the hopper (4); the end of the sealing belt (5) close to the axis of the mixing barrel (1) is connected to the slewing ring (6) .
The swing type rotary sealing system according to claim 3, characterized in that: the upper front end surface of the hopper (4) is provided with a sealing plate ( 7).
The swing type rotary sealing system according to claim 1, characterized in that: the stop mechanism includes bosses (9) arranged on the left and right sides of the sealing cover (3) and the sealing cover (3). A stopper (8), the boss (9) is used to block the stopper (8) to prevent the sealing cover (3) from following the rotation of the mixing barrel (1).
The swing type rotary sealing system according to claim 1, characterized in that: the discharge hole (10) has a fan ring shape, and the center of the fan ring part coincides with the center of the sealing cover (3);

or,

The discharging hole (10) is fan-shaped, the circle center of the fan-shaped part coincides with the circle center of the sealing cover (3), and a stop belt (11) is provided at the junction of the fan-shaped linear part and the slewing ring (6).
The swing type rotary sealing system according to any one of claims 1 to 6, characterized in that: the rotary sealing device (2) comprises a ring rail (2-3) arranged at the rear of the mixing tank (1), so The inner edge of the ring rail (2-3) is connected with the outer circular surface of the middle part of the cylindrical part at the rear of the mixing tank (1) or connected with the rear end of the mixing tank (1), and the ring rail (2- 3) Located on the front side of the sealing cover (3);

The rotary sealing device (2) also includes a connecting ring (2-2) installed at the front end of the sealing cover (3) and sleeved outside the ring rail (2-3), and installed at the front end of the connecting ring (2-2) And the fixed ring (2-1) located on the front side of the ring rail (2-3); the ring rail (2-3) is located in the ring formed by the connecting ring (2-2) and the fixed ring (2-1) In the space, the ring rail (2-3) is in sliding fit with the connecting ring (2-2) and the fixed ring (2-1), and an annular sealing mechanism is also arranged in the annular space.
The oscillating rotary sealing system according to claim 7, characterized in that: when the inner edge of the ring rail (2-3) and the outer circular surface of the middle part of the cylindrical part at the rear of the mixing tank (1) When connected, the sealing mechanism in the annular space is a sealing ring (2-6); the front end surface of the ring rail (2-3) is in contact with the rear end surface of the fixed ring (2-1), and the ring rail ( The rear end surface of 2-3) is in contact with the front end surface of the sealing ring (2-6); the inner side of the front end of the connecting ring (2-2) is provided with an annular groove, and the outer edges of the ring rail (2-3) are all located In the annular groove; the sealing ring (2-6) is surrounded by the ring rail (2-3), the cylindrical part of the tail end of the mixing barrel (1), the sealing cover (3) and the connecting ring (2-2) Within the space

When the inner edge of the ring rail (2-3) is connected to the rear end of the mixing tank (1), the sealing mechanism in the annular space includes a sealing ring (2-5) and a sealing ring (2-6); The cross-sectional shape of the sealing ring (2-5) is L-shaped, including a ring-shaped part and a cylindrical part whose front end is connected to the inner edge of the ring-shaped part; the front end surface of the ring rail (2-3) is connected to the fixed The rear end surface of the ring (2-1) is in contact, and the rear end surface of the ring rail (2-3) is in contact with the front end surface of the ring part; the inner side of the front end of the connecting ring (2-2) is provided with an annular groove, and the ring The outer edges of the rail (2-3) and the annular part are located in the annular groove; the sealing ring (2-6) is located in the annular part, the cylindrical part, the sealing cover (3) and the connecting ring (2-2) ) Within the enclosed space.
The swing type rotary seal system according to claim 8, characterized in that: there is a gap between the outer circular surface of the sealing ring (2-6) and the connecting ring (2-2), and the gap is installed A compression ring (2-7) with a wedge-shaped cross-section, and the rear end of the compression ring (2-7) is in contact with the sealing cover (3).
The swing type rotary seal system according to claim 8 or 9, characterized in that: the top of the connecting ring (2-2) is also provided with a lubricant cavity, and the lubricant cavity is in communication with the annular groove.