WO2013056450A1

WO2013056450A1 - Brushing apparatus for shotcreting machine and sprayer assembly of shotcreting machine

Info

Publication number: WO2013056450A1
Application number: PCT/CN2011/081035
Authority: WO
Inventors: 郭岗; 闫琼; 刘小明; 刘健宁
Original assignee: 中联重科股份有限公司; 湖南中联重科专用车有限责任公司
Priority date: 2011-10-20
Filing date: 2011-10-20
Publication date: 2013-04-25

Abstract

Disclosed is a brushing apparatus for a shotcreting machine. The brushing apparatus comprises a first rotary drive member (30) and a rotating member (40) with one side connected to an output end of the first rotary drive member (30), and a plurality of eccentric mounting positions being provided on an end surface of the other side of the rotating member (40), wherein a connecting shaft (13) is optionally mounted at one of the eccentric mounting positions, and when the connecting shaft is located at a different eccentric mounting position, the included angle between the axis of the connecting shaft (13) and the axis of rotation of the rotating member (40) is different. Furthermore, also disclosed is a sprayer assembly for a shotcreting machine having the brushing apparatus. The brushing apparatus and the sprayer assembly having the brushing apparatus can spray concrete at an appropriate brushing angle adjusted according to different spray surfaces, thereby reducing the rebound rate of the concrete and decreasing non-cured concrete slump, so as to improve concrete spraying efficiency.

Description

Nozzle assembly for concrete jet brushing device and concrete jet machine

The present invention relates to the field of concrete construction, and in particular to a brushing device for a concrete jet machine and a concrete jet nozzle assembly using the same. Background technique

The concrete jet machine is a construction machine that continuously transports concrete mix by using compressed air and sprays it onto the spray surface to form a support structure to strengthen and protect the surface of the building. At present, the commonly used concrete jets are dry concrete jets and wet concrete jets. Among them, the wet concrete jet machine has been widely used because of its small amount of concrete rebound, low dust content in the air, and little harm to the human body.

The nozzle assembly of the existing wet concrete jet machine generally adjusts the position of the nozzle assembly according to the injection surface, and after the position is determined, the injection surface is continuously sprayed, and then the nozzle assembly is moved to spray other spray surfaces, thereby finally Form concrete support.

However, due to the influence of the spray distance and the concrete aggregate ratio, if the above method of directly spraying the concrete is used, it is very likely that the sprayed concrete is collapsed due to aerodynamic interference when the concrete has not completely solidified. In addition, the sprayed concrete may not completely adhere to the spray surface, which will inevitably cause the concrete to rebound.

Therefore, it is necessary to improve the nozzle assembly of the concrete jet machine to improve the injection efficiency of the concrete. Summary of the invention

A first object of the present invention is to provide a concrete jet brushing device capable of adjusting a brushing angle and adjusting to different brushing positions according to different ejection faces. Set, spray the concrete at different brushing angles to improve the jetting efficiency of the concrete.

A second object of the present invention is to provide a nozzle assembly for a concrete jet using the above-described concrete jet brushing device.

In order to achieve the above first object, the present invention provides a concrete jet brushing device, the brushing device comprising a first rotary drive member and a rotary member connected to an output end of the first rotary drive member, A plurality of eccentric mounting positions are disposed on the other end surface of the rotating member, and the connecting shaft is selectively mounted at an eccentric mounting position at different eccentric mounting positions, the axis of the connecting shaft and the rotation axis of the rotating member The angle between them is different.

Preferably, a plurality of wedge-shaped grooves are respectively disposed at the plurality of eccentric mounting positions, the inclined faces of the plurality of wedge-shaped grooves are inclined toward the first rotary driving member, and the inclined faces of the plurality of wedge-shaped grooves are opposite to the rotating member The rotation axes respectively have different declination angles from each other, and mounting holes are respectively provided in the plurality of wedge-shaped grooves, and the connection shafts are selectively installed in one mounting hole.

Preferably, the wedge-shaped grooves in the plurality of eccentric mounting positions are circumferentially equidistantly disposed on an end surface of the rotating member.

Preferably, the rotating member is provided with a first wedge groove, a second wedge groove and a third wedge groove, and the inclined surfaces of the first wedge groove, the second wedge groove and the third wedge groove are opposite to the rotating member The rotation axes have different declination angles, α ₂ and α _{3 , respectively} .

Preferably, the rotating member includes a connecting cover and a mounting plate mounted on the connecting cover, and the connecting cover is connected to an output end of the first rotating driving member through a flange, the end surface of the mounting plate A plurality of eccentric mounting positions are provided, and the connecting shaft is selectively mounted in an eccentric mounting position.

Preferably, the brushing device comprises an upper support and a lower support, the first rotary drive member is mounted at a front end of the upper support, and one end of the lower support is fixed at a connection with a connecting shaft On the front end of the support, the other end of the lower support is fixedly connected to the rear end of the upper support.

Preferably, the rear end of the upper support and the other end of the lower support are fixedly connected by an elastic member. Preferably, the connecting shaft is coupled to the lower support by a bearing.

In order to achieve the second object of the present invention, the present invention provides a nozzle assembly for a concrete jet machine, the nozzle assembly of the concrete jet comprising a feed pipe, a nozzle, and the above-described concrete jet brushing device, The nozzle is provided with a nozzle connecting member, and the feeding tube is mounted on the lower holder through the nozzle connecting member, and the nozzle is installed at an end of the conveying pipe.

Preferably, the nozzle assembly of the concrete jet machine includes a second driving member and a mounting bracket, the second driving member is mounted at one end of the mounting bracket, and an output end of the second driving member and the upper portion The holder is fixedly coupled to swing the upper holder to the left and right.

Preferably, the nozzle assembly of the concrete jet machine includes a third drive member, and the output end of the third drive member is vertically fixedly coupled to the other end of the mounting bracket to swing the mounting bracket up and down.

In the above-mentioned concrete jet brushing device, the connecting shaft is installed at different eccentric mounting positions, so that the angle between the axis of the connecting shaft and the rotating axis of the rotating member is different, and thus the concrete jet brushing device has different Brush the angle. Therefore, the nozzle assembly using the above brushing device can be sprayed according to different spray surfaces to adjust the appropriate brushing angle, thereby reducing the rebound rate of the concrete and reducing the collapse of the unsolidified concrete, thereby improving the injection efficiency of the concrete. .

Other features and advantages of the invention will be described in detail in the detailed description which follows. DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are in the In the drawing:

Figure 1 is a schematic view of the brushing device of the concrete jet of the present invention;

Figure 2 is a partial cross-sectional view showing the brushing device of the concrete jet of the present invention; Figure 3 is an exploded perspective view of the rotating member and the connecting shaft of the concrete jetting device of the present invention; Figure 4 is a schematic view of the nozzle assembly of the concrete jetting device of the present invention. Description of the reference numerals

10 third drive member 11 upper support 12 lower support

13 Connecting shaft 14 bearing 15 Elastic parts

16 nozzle connector 17 mounting bracket 20 second driver

30 first rotary drive 31 flange 40 rotary

41 Connection cover 42 Mounting plate 43 Wedge groove

43a first wedge groove 43b second wedge groove 43c third wedge groove

44 Mounting holes 50 Feed pipe 60 Nozzle

70 arm frame

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are intended to be illustrative and not restrictive.

In the present invention, the orientation words "up, down, left, and right" are generally used to refer to the boom of a concrete jet, and the orientation words "before and after" are usually When the concrete jet is working, it is close to the spray surface and rearward from the spray surface.

The concrete jet brushing device of the present invention can be preferably applied to the nozzle assembly of various wet concrete sprayers, but is not limited to this range of use. The concrete jet machine uses the brushing device to cause the nozzle assembly to be brushed and sprayed.

In the actual spraying operation, due to the complicated shape of the injection surface and the difference of the concrete aggregate ratio, the existing single brushing angle cannot meet the actual working conditions. In other words, if different brushing angles are required, different brushing devices need to be replaced, which increases the workload of the operator and increases Production costs. The brushing device provided by the invention can select different brushing angle ranges according to different working conditions. Since different brushing angles are applied to different ejection faces, the rebound rate of the concrete can be more effectively reduced and the collapse of the unsolidified concrete can be reduced, thereby improving the ejection efficiency.

As shown in FIG. 1, the concrete jet brushing device of the present invention comprises a first rotary drive member 30 and a rotary member 40 on one side connected to the output end of the first rotary drive member 30, on the other side of the rotary member 40. The end face is provided with a plurality of eccentric mounting positions, and the connecting shaft 13 is selectively mounted at an eccentric mounting position at different eccentric mounting positions, and the angle between the axis of the connecting shaft 13 and the axis of rotation of the rotating member 40 is different. .

The first rotary drive member 30 can be any drive device capable of driving the rotary member 40 to perform a rotary motion, such as a motor or the like. In the present invention, a hydraulic motor is preferably used to drive the rotary member 40 for the swinging motion.

When the concrete jet brushing device is in the working state, by rotating the first rotary drive member 30, the rotary member 40 connected to the output end of the first rotary drive member 30 is rotated, and then driven to be mounted on the other side of the rotary member 40. The connecting shaft 13 rotates. Since the connecting shaft 13 is mounted in an eccentric mounting position, an angle is formed between the axis of the connecting shaft 13 and the rotational axis of the rotary member 40. Also, since the rotary member 40 has a plurality of eccentric mounting positions, when the connecting shaft 13 is mounted at different eccentric mounting positions, the angle between the axis of the connecting shaft 13 and the rotational axis of the connecting shaft 13 is different.

As described above, according to the present invention, the concrete brushing device can be adjusted to a suitable brushing angle to spray the concrete according to different spray surfaces, thereby reducing the rebound rate of the concrete and reducing the collapse of the unsolidified concrete, thereby improving the jetting of the concrete. Efficiency and good spray results. Moreover, when different brushing angles are required, it is only necessary to adjust the mounting position of the connecting shaft 13 and adjust the installation of the relevant components, thereby reducing the workload of the operator, and further eliminating the need to equip the concrete jet with multiple concretes. Brushing the device reduces manufacturing costs.

It can be understood that in the above brushing device, the eccentric mounting position can have various structural forms. These structural forms are not detailed one by one, and the following is only an example of one of them. Choose the structure.

Referring to Fig. 2, wedge-shaped grooves 43 are respectively provided at a plurality of eccentric mounting positions, the inclined faces of the wedge-shaped grooves 43 are all inclined toward the first rotary driving member 30, and the inclined faces of the plurality of tapered grooves 43 and the end faces of the rotary member 40 are There are respectively different yaw angles from each other, and mounting holes 44 are respectively provided in the plurality of wedge-shaped grooves 43, and the connecting shaft 13 is selectively mounted in one mounting hole 44. The brushing cone angle can be changed by mounting the connecting shaft 13 in the mounting hole 44 of the different wedge-shaped groove 43, and the spraying range of the brushing device has a plurality of gear positions.

Specifically, the slope of the wedge groove 43 has an off angle α with the original end surface of the rotary member 40. Thus, the axis of the connecting shaft 13 mounted in the mounting hole 44 in the inclined surface is at an angle with the axis of rotation thereof. Mounting the connecting shaft 13 in a different mounting hole 44 has a different said angle. Further, since the slope of the wedge groove 43 is inclined toward the first rotary driving member 30, the rotation locus of the connecting shaft 13 exhibits a taper which diverges from the mounting end to the free end.

Preferably, the plurality of wedge-shaped grooves 43 in the eccentric mounting positions are circumferentially equidistantly disposed on the end faces of the rotary member 40 to balance the force of the rotary member 40 as much as possible during the turning, thereby reducing stress concentration.

Other structural modifications may be made by those skilled in the art from the description of the above structures, and such structural deformations should fall within the scope of the present invention.

In a specific embodiment of the invention, three different wedge slots 43 are now exemplified. As shown in FIG. 3, a first wedge-shaped groove 43a, a second wedge-shaped groove 43b and a third wedge-shaped groove 43c are provided on the rotary member 40, and the first wedge-shaped groove 43a, the second wedge-shaped groove 43b and the third wedge-shaped groove 43c are provided. The inclined surface and the rotation axis of the rotary member 40 respectively have different off angles a (1 ₂ and (1 _{3 )} . In other words, when the connection shaft 13 is mounted in the mounting hole 44 of the first wedge groove 43a, the connection shaft 13 is The axis has a first angle with its axis of rotation. When the first slewing drive 30 is in operation, the connecting shaft 13 will drive the downstream component to brush at a cone angle of 2[ _alpha ].

Similarly, the connecting shaft 13 is mounted in the second wedge groove 43b and the third wedge groove 43c, respectively, and the downstream members will be brushed at the taper angles of 2 and 2α ₃ , respectively. Referring to FIGS. 2 and 3, the rotary member 40 of the present invention may include a connection cover 41 and a mounting plate 42 mounted on the connection cover 41. Specifically, a connection hole is provided in the connection cover 41 and the mounting plate 42, and the mounting plate 42 and the connection cover 41 can be fixedly connected by the fasteners 45.

As is known in the art, the connection cover 41 can be coupled to the output of the first rotary drive member 30 in various ways, for example, via the flange 31 to the output of the first rotary drive member 30. Also, a plurality of eccentric mounting positions are provided on the end face of the mounting plate 42, and the connecting shaft 13 is selectively mounted at an eccentric mounting position.

The structure of the above-mentioned rotary member 40 facilitates the processing and facilitates the mounting and handling of downstream components. As shown in FIGS. 1 and 4, the brushing device includes an upper support 11 and a lower support 12. The first rotary drive member 30 is mounted on the front end of the upper support 11, and one end of the lower support 12 is connected to the connecting shaft 13. The other end of the lower holder 12 is fixedly coupled to the rear end of the upper holder 11 while being fixed to the front end of the upper holder 11.

Preferably, the rear end of the upper holder 11 and the other end of the lower holder 12 are fixedly coupled by an elastic member 15. The elastic member 15 can be made of an elastic material known to those skilled in the art, and the elastic member 15 is connected to the upper support 11 and the lower support 12 by an existing connection. When the end of the lower holder 12 follows the rotation of the connecting shaft 13, since the elastic member 15 is fixedly coupled to the other end of the lower holder 12, the lower holder 12 is cushioned and positioned. At this time, the resilience of the elastic member 15 ensures the smoothness of brushing and the efficiency of brushing of the brushing device of the concrete jet.

Preferably, the connecting shaft 13 is connected to the lower support 12 via a bearing 14. As is known to those skilled in the art, the bearing 14 is mounted to the lower support 12 in any manner known to those skilled in the art. The connecting shaft 13 is mounted in the bearing 14, thereby transmitting the rotary motion of the connecting shaft 13 to one end of the lower support 12, and since the other end of the lower support 12 is fixedly coupled to the elastic member 15, the entire lower support 12 The trajectory of motion is formed into a cone, a so-called brushing. By the brushing of the lower support 12, the brushing of the downstream component is driven, and finally the nozzle 60 is swept to spray the concrete on the spray surface in a range of a certain cone angle. As described above, when the connecting shaft 13 is mounted at different eccentric mounting positions (in the mounting holes 44 of the different wedge grooves 43), the axis of the connecting shaft 13 and the rotating shaft of the rotating member 40 are rotated. The angle between the lines is different, and the lower support 12 connected to the connecting shaft 13 is further brushed at different brushing angles, so that the nozzle 60 is finally sprayed with different brushing angles to adapt to different injections. surface. The case of the nozzle 60 will be described below.

The concrete jet brushing device has been described in detail above. In addition, the present invention also relates to a nozzle assembly for a concrete jet machine, the nozzle assembly including a delivery tube 50, a nozzle 60, and the above-described concrete jet brushing device, and a nozzle connector 16 is disposed on the lower holder 12, The delivery tube 50 is mounted to the lower support 12 via a spray head connector 16, which is mounted at the end of the delivery tube 50.

The material of the delivery tube 50, the structure of the nozzle 60, and the like are well known in the art and will not be described again. The nozzle 60 is mounted at the end of the delivery tube 50 in a variety of achievable manners such that any movement of the lower support 12 will be transmitted through the spray head connector 16 to the nozzle 60 at the end of the delivery tube 50. Brush the movement.

Referring to Figure 4, the nozzle assembly of the concrete jet of the present invention includes a second drive member 20 and a mounting bracket 17, the second drive member 20 being fixedly mounted at one end of the mounting bracket 17, and the output end of the second drive member 20 and the upper portion The holder 11 is fixedly coupled so that the upper holder 11 can swing left and right.

It will be appreciated that the output of the second drive member 20 and the upper support 11 can be fixedly connected by any means known in the art, such as by a flange (not shown) or the like. The second driving member 20 may be a plurality of driving devices known to those skilled in the art. In the present invention, the cycloidal motor is preferably used, that is, the output shaft of the second driving member 20 is continuously oscillated within a certain angular range. Thereby, the second driving member 20 can be controlled to cause the second driving member 20 to drive the upper holder 11 and its downstream member to continuously swing. In the actual spraying operation, the left and right swing of the head assembly with respect to the boom 70 of the concrete jet can be achieved.

Preferably, the nozzle assembly of the concrete jet machine comprises a third driving member 10, the output end of which is vertically fixedly connected to the other end of the mounting bracket 17, and at the same time, the third driving member 10 and the mounting bracket 17 are additionally One end is mounted on the boom 70 so that the mounting bracket 17 can swing up and down. Likewise, the third drive member 10 and the other end of the mounting bracket 17 can be fixedly coupled by any means known in the art. And wherein the third driving member 10 can also be a driving device of various forms. Preferably, a cycloidal motor is used as the third drive member 10. The third driving member 10 can be driven to drive the mounting bracket 17 and its downstream components to continuously swing by controlling the third driving member 10. In the actual spraying operation, the upper and lower swings of the head assembly with respect to the boom 70 can be achieved.

It should be noted that the above-mentioned mounting bracket 17 can have various structural forms, and is preferably a vertical bracket in the present invention. As shown in FIGS. 1 and 4, the mounting bracket 17 is integrally formed by mutually perpendicular portions such that the output shafts of the second driving member 20 and the third driving member 10 mounted on the mounting bracket 17 have mutually perpendicular axes. Further, the downstream components of the mounting bracket 17 and the mounting bracket 17 are oscillated in different directions.

In the prior art, there has been a technical solution for realizing the up and down swing and the left and right swing of the nozzle assembly as described above, and will not be described in further detail herein.

Therefore, the nozzle 60 of the concrete jet of the present invention realizes ejection on any ejection surface in a three-dimensional space by the above-described up-and-down swing and left-right swing. Further, the surface spray operation of the concrete jet machine is realized by the above-described brushing device. Since the nozzle 60 is brushed in the range of the cone angle of 2α, the surface spray range of the concrete jet is expanded. During the brushing of the nozzle 60, a certain solidification time can be provided for the concrete that has been sprayed on the spray surface, preventing the aerodynamic interference of the high-pressure airflow on the concrete on the spray surface when the concrete is sprayed again, and reducing the collapse of the unsolidified concrete. Drop, thereby improving the efficiency of the injection and the utilization of the concrete. Moreover, depending on the specific spray surface condition, different mounting positions of the connecting shaft 13 can be set to perform different spraying operations with a suitable brushing taper angle.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments, and various simple modifications of the technical solutions of the present invention may be made within the scope of the technical idea of the present invention. These simple variations are within the scope of the invention. For example, the number of wedge grooves 43 can be changed, the brushing position of the concrete jet machine can be increased or decreased, and the like.

In addition, it should be noted that the specific technical features described in the foregoing specific embodiments may be combined in any suitable manner without contradiction, in order to avoid The necessary repetition of the present invention will not be further described in the various possible combinations.

In addition, any combination of various embodiments of the invention may be made, as long as it does not deviate from the idea of the invention, and should also be regarded as the disclosure of the invention.

Claims

Rights request

A concrete jet brushing device, wherein the brushing device comprises a first rotary drive member (30) and a rotary member (40) connected to an output end of the first rotary drive member (30) on one side, A plurality of eccentric mounting positions are provided on the other end surface of the rotating member (40), and the connecting shaft (13) is selectively mounted at an eccentric mounting position at different eccentric mounting positions, the connecting shaft (13) The angle between the axis of the rotating member and the axis of rotation of the rotating member (40) is different.

2. The concrete jet brushing device according to claim 1, wherein a plurality of wedge-shaped grooves (43) are respectively disposed at the plurality of eccentric mounting positions, and the inclined faces of the plurality of wedge-shaped grooves (43) face The first slewing drive member (30) is inclined, and the inclined faces of the plurality of wedge-shaped grooves (43) and the rotation axis of the rotary member (40) respectively have different yaw angles from each other, in the plurality of wedge shapes Mounting holes (44) are respectively provided in the slots (43), and the connecting shafts (13) are selectively mounted in one mounting hole (44).

3. The concrete jet brushing device according to claim 2, wherein the wedge-shaped grooves (43) in the plurality of eccentric mounting positions are circumferentially equidistantly disposed on the rotating member (40) On the end face.

4. The concrete jet brushing device according to claim 3, wherein the rotating member (40) is provided with a first wedge groove (43a), a second wedge groove (43b) and a third wedge shape. The groove (43c), the inclined faces of the first wedge groove (43a), the second wedge groove (43b) and the third wedge groove (43c) and the rotation axis of the rotating member (40) respectively have different from each other Deflection angle a α ₂ P

The concrete jet brushing device according to claim 1, wherein the rotating member (40) comprises a connecting cover (41) and a mounting plate (42) mounted on the connecting cover (41) , The connecting cover (41) is connected to the output end of the first rotary driving member (30) through a flange (31), and an end surface of the mounting plate (42) is provided with a plurality of eccentric mounting positions, and the connecting shaft (13) Optionally mounted in an eccentric mounting position.

6. The concrete jet brushing device according to claim 1, wherein the brushing device comprises an upper support (11) and a lower support (12), and the first rotary drive member (30) Mounted at the front end of the upper support (11), one end of the lower support (12) is fixed to the front end of the upper support (11) by being connected to the connecting shaft (13), The other end of the lower support (12) is fixedly coupled to the rear end of the upper support (11).

7. The concrete jet brushing device according to claim 6, wherein an elastic member is passed between the rear end of the upper support (11) and the other end of the lower support (12). ) Fixed connection.

8. A concrete jet brushing device according to claim 6, characterized in that the connecting shaft (13) is connected to the lower support (12) via a bearing (14).

9. A nozzle assembly for a concrete jet machine, characterized in that the nozzle assembly of the concrete jet comprises a delivery tube (50), a nozzle (60) and a method according to any one of claims 1-8 a concrete jet brushing device, on which the nozzle holder (16) is disposed, and the delivery tube (50) is mounted on the lower holder by the nozzle connector (16) (12) The nozzle (60) is mounted at an end of the delivery tube (50).

10. The nozzle assembly of a concrete jet according to claim 9, wherein the nozzle assembly of the concrete jet comprises a second driving member (20) and a mounting bracket (17), the second driving a member (20) fixedly mounted at one end of the mounting bracket (17), and the The output end of the two driving member (20) is fixedly connected to the upper support (11) to swing the upper support (11) to the left and right.

11. The nozzle assembly of a concrete jet according to claim 10, wherein the nozzle assembly of the concrete jet comprises a third drive member (10), an output end of the third drive member (10) A fixed fixed connection is made to the other end of the mounting bracket (17) to swing the mounting bracket (17) up and down.