CN210767872U

CN210767872U - Elbow pipe, material conveying device and engineering vehicle

Info

Publication number: CN210767872U
Application number: CN201921128386.9U
Authority: CN
Inventors: 葛超波; 曹富龙; 王友刚; 庄维林
Original assignee: Xuzhou XCMG Schwing Machinery Co Ltd
Current assignee: Xuzhou XCMG Schwing Machinery Co Ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-06-16
Anticipated expiration: 2029-07-18

Abstract

The utility model relates to an engineering vehicle technical field, in particular to return bend, material conveyor and engineering vehicle. The utility model provides an elbow, including the body, body inside has hollow lumen, and the central axis of lumen is space curve, and this is favorable to promoting engineering vehicle's such as mobile concrete pump place current ability.

Description

Elbow pipe, material conveying device and engineering vehicle

Technical Field

The utility model relates to an engineering vehicle technical field, in particular to return bend, material conveyor and engineering vehicle.

Background

In engineering vehicles such as concrete pump trucks and the like, generally, a material conveying device is obliquely arranged under the influence of a chassis axle, the feeding height and the like, a bent pipe is arranged between a hopper outlet and a conveying pipe inlet for connection, and the lowest point of the bent pipe forms the lowest point of the material conveying device.

In the prior art, the central axis of the pipe cavity of the elbow is generally a plane curve, and under the condition, the lowest point of the elbow is closer to the ground, so that the field traffic capacity of vehicles is influenced, the accumulation of materials in the elbow is easily caused, the smoothness of material conveying is influenced, and the problems of pipe blockage, pipe explosion and the like are even caused.

Disclosure of Invention

The utility model discloses a technical problem who solves does: the field traffic capacity of the engineering vehicle is improved.

In order to solve the technical problem, the utility model discloses the first aspect provides an elbow, and it includes the body, and the body is inside to have hollow lumen, and the central axis of lumen is space curve.

In some embodiments, the pipe body includes a first pipe section and a second pipe section, the second pipe section is bent relative to the first pipe section, an end of the first pipe section far away from the second pipe section is a first end of the pipe body, and an end of the second pipe section far away from the first pipe section is a second end of the pipe body.

In some embodiments, the second tube segment is bent 90 ° relative to the first tube segment.

In some embodiments, the cross-section of the tube is circular.

The utility model discloses the second aspect still provides a material conveying device, and it includes first material transport piece and second material transport piece, and still include the utility model discloses a return bend, first material transport piece, return bend and second material transport piece are arranged along material direction of delivery in proper order, and the first end and the second end of body are connected with first material transport piece and second material transport piece respectively, and the second end of body is higher than the first end of body.

In some embodiments, a normal of the first end surface of the pipe body is perpendicular to a surface of the first material conveying member for connecting with the pipe body.

In some embodiments, the first material transport is a hopper; and/or the second material conveying piece is a conveying pipe.

In some embodiments, the elbow is removably connected to at least one of the first material transport and the second material transport.

The utility model discloses the third aspect still provides an engineering vehicle, and it includes the chassis, and it still includes the utility model discloses a material conveyor, material conveyor sets up on the frame.

In some embodiments, the engineering vehicle is a concrete pump truck or a shotcrete truck.

The utility model provides an elbow, the central axis of its lumen no longer be plane curve, and for space curve, when this makes to be applied to engineering vehicle's such as concrete pump truck material conveyor with this elbow on, the minimum of elbow can be rised to be favorable to promoting engineering vehicle's such as concrete pump truck place current ability.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 shows a schematic diagram of the structure of a concrete pump truck in the prior art.

Fig. 2 shows a front view of the elbow of fig. 1.

Fig. 3 shows a bottom view of fig. 2.

Fig. 4 is a schematic diagram showing the structure of a concrete pump truck according to an embodiment of the present invention.

Fig. 5 shows a front view of the elbow of fig. 4.

Fig. 6 shows a bottom view of fig. 5.

In the figure:

1', an oil cylinder; 3', a conveying cylinder; 4', a hopper; 5', bending a pipe; 5 a', a first end; 5 b', a second end; 5 c', a central axis; 6', a conveying pipe; 7', a chassis;

1. an oil cylinder; 3. a delivery cylinder; 4. a hopper; 5. bending the pipe; 51. a first tube section; 52. a second tube section; 5a, a first end; 5b, a second end; 5c, a central axis; 6. a delivery pipe; 7. a chassis.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by the ordinary skilled person in the art without developing the creative work belong to the protection scope of the present invention.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

In the description of the present invention, it should be understood that the terms "first", "second", etc. are used to define the components, and are only used for the convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, should not be interpreted as limiting the scope of the present invention.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

The present invention relates to a concrete pump truck, a concrete spraying truck, and the like, and for convenience of description, the following description will be made only by taking the case where the construction vehicle is a concrete pump truck as an example.

The concrete pump truck is an engineering vehicle for realizing continuous concrete conveying by utilizing pressure, is generally formed by modifying an automobile chassis, and generally comprises the automobile chassis, a material conveying device, an arm support system and the like which are integrated on the automobile chassis. Besides the on-site concrete pumping, the concrete pump truck can complete the material distribution operation through the boom system, and the pouring point of the concrete can be changed at will within the working range of the boom.

The concrete pump truck is generally used in cooperation with a concrete mixing truck, and according to the requirements of relevant regulations, the distribution height of the concrete mixing truck needs to be limited within a certain range, and correspondingly, the height of the concrete pump truck is also limited.

Fig. 1 to 3 show a material conveying device of a conventional concrete pump truck and an elbow structure thereof. As shown in fig. 1 to 3, the material conveying apparatus of the concrete pump truck is provided on a chassis 7 'and includes an oil cylinder 1', a conveying cylinder 3 ', a hopper 4', an elbow pipe 5 'and a conveying pipe 6' which are arranged and connected in sequence along a conveying direction of a material (i.e., concrete). During operation, the oil cylinder 1 'pushes the piston of the conveying cylinder 3' forwards and backwards to realize forward pumping and backward absorption of concrete in the hopper 4 ', wherein the concrete pumped forwards flows into the conveying pipe 6' from the hopper 4 'through the elbow pipe 5' to realize forward conveying of the concrete.

As can be seen from fig. 1, the oil cylinder 1 ', the conveying cylinder 3', the hopper 4 'and the elbow 5' are all arranged in a downward inclination along the material conveying direction, while the conveying pipe 6 'extends upward from the elbow 5', so that the elbow 5 'forms the lowest point of the material conveying device and the lowest point of the elbow 5' forms the lowest point of the material conveying device. In fact, the lowest point of the bend 5' is also the lowest point of the entire boarding system. In this case, the height above the ground of the lowest point of the elbow 5' is important for the passing performance of the entire vehicle.

However, in practicing the present invention, the inventor has found that the present elbow 5 ', as shown in fig. 2 and 3, has a central axis 5 c' of its lumen that is a planar curve, in this case, the elbow 5 'is a straight elbow, the first end 5 a' and the second end 5b 'of its tubular body are coplanar with each other, and the line connecting the center of the first end 5 a' and the center of the second end 5b 'is along the normal direction of the end surface of the first end 5 a', in other words, the line connecting the center of the first end 5a 'and the center of the second end 5 b' is collinear with the normal direction of the end surface of the first end 5a ', so that when the elbow 5' is installed in the material conveying device, as shown in fig. 1, the line connecting the center of the first end 5a 'and the center of the second end 5 b' is collinear with the normal direction of the installation plane (i.e., the surface of the hopper 4 'for connecting with the elbow 5'), resulting in that the ground clearance h of the lowest point of the elbow, namely, the lowest point of the elbow pipe 5' is close to the ground, the departure angle of the concrete pump truck is small, the passing performance is poor, and the concrete pump truck is easy to collide with other objects in the driving process, so that structural parts are damaged, and even safety accidents are caused. The departure angle is a minimum included angle formed between a plane tangent to the two rear wheels through any protruding point at the rear part of the vehicle and a supporting surface, and is used for representing the capability of the vehicle not to collide when the vehicle leaves an obstacle (such as a hill, a ditch and the like). The larger the departure angle, the better the vehicle's trafficability.

In addition, the straight-line bent pipe is easy to cause problems such as material accumulation and blockage. Because the elbow pipe 5 'is the lowest position of the material conveying device, after the concrete pump truck works, partial concrete is easy to remain in the elbow pipe 5', and generally water is used for cleaning in order to prevent the concrete from solidifying in the pipe, even if a small amount of residues exist, the residues can be accumulated at the lowest position of the elbow pipe 5 'under the action of self weight or reverse pump and can be solidified at the lowest position, more concrete can be solidified at the position in the past, the smoothness of pumping is influenced, and the problems of pipe blockage, pipe explosion and the like even occur, and the problems are more prominent when the lowest point of the elbow pipe 5' is closer to the ground. Therefore, the conventional straight elbow pipe 5' is likely to cause problems such as material accumulation and clogging.

In order to the above situation, the utility model discloses self structure to the return bend improves to realize the optimization to material conveyor pipeline arrangement mode based on modified return bend structure, and then promote the trafficability characteristic of concrete pump truck, and improve the pump sending ride comfort of concrete.

Fig. 4-6 show the concrete pump truck and the structure of the elbow pipe thereof according to an embodiment of the present invention.

As shown in fig. 4 to 6, in this embodiment, the concrete pump truck includes a chassis 7 and a material conveying device provided on the chassis 7, the material conveying device includes an oil cylinder 1, a conveying cylinder 3, a hopper 4, an elbow 5, a conveying pipe 6, and the like, and the oil cylinder 1, the conveying cylinder 3, the hopper 4, the elbow 5, and the conveying pipe 6 are arranged in this order along a material conveying direction and connected to each other.

During operation, the oil cylinder 1 pushes the piston of the conveying cylinder 3 forwards and backwards to realize forward pumping and backward absorption of concrete in the hopper 4, wherein the forward pumped concrete flows into the conveying pipe 6 from the hopper 4 through the bent pipe 5 to realize forward conveying of the concrete.

As can be seen from fig. 4, the oil cylinder 1, the conveying cylinder 3, the hopper 4 and the elbow 5 are all arranged obliquely downwards along the material conveying direction, while the conveying pipe 6 extends upwards from the elbow 5, so that the elbow 5 forms the lowest point of the material conveying device and the lowest point of the elbow 5 forms the lowest point of the material conveying device. In fact, the lowest point of the bend 5 is also the lowest point of the entire boarding system.

As shown in fig. 4 to 6, in this embodiment the elbow 5 still comprises a tube body, inside which a lumen is also provided, however, the central axis 5c of the lumen is no longer a planar curve but is configured as a spatial curve (e.g. a spiral).

By configuring the central axis 5c of the lumen of the elbow 5 as a spatial curve, the first end 5a (or inlet) and the second end 5b (or outlet) of the tube are no longer in the same plane but are out of plane with each other, and have a height difference therebetween, wherein the second end 5b of the tube is higher than the first end 5a of the tube, and the line connecting the center of the first end 5a and the center of the second end 5b is no longer along the normal direction of the end surface of the first end 5a, but has an angle with the normal direction of the end surface of the first end 5a, in other words, the line connecting the center of the first end 5a and the center of the second end 5b has an inclination angle with respect to the normal direction of the end surface of the first end 5 a.

Based on this, as shown in fig. 1, when the elbow pipe 5 is installed, the first end 5a with the lower height is connected to the hopper 4, and the second end 5b with the higher height is connected to the delivery pipe 6, so that the ground clearance h of the lowest point (specifically, the bent point) of the elbow pipe 5 can be effectively raised, and the connecting line of the center of the first end 5a and the center of the second end 5b becomes inclined with respect to the normal direction of the installation plane (i.e., the surface of the hopper 4 for connecting with the elbow pipe 5), and is specifically inclined upwards, so that the departure angle of the concrete pump truck can be increased, the risk of collision or hooking with other objects during driving can be reduced, and the field passing performance of the concrete pump truck can be improved.

Moreover, because the lowest point of the elbow pipe 5 is lifted, particularly, as shown in fig. 4, the lowest point of the elbow pipe 5 is lifted to be higher than the lowest position of the discharge port of the hopper 4, the accumulation of concrete at the lowest point of the elbow pipe 5 can be reduced, so that after the conveying pipe 6, the elbow pipe 5 and the like are cleaned, the residual materials can flow to the hopper 4 through the elbow pipe 5, the cleanliness in the conveying pipe 6 and the elbow pipe 5 is improved, the smoothness of material conveying is improved, and the occurrence probability of problems such as pipe blockage and pipe burst is reduced.

The pipe body may include only two pipe sections, or may include a plurality of pipe sections. Specifically, in this embodiment, as shown in fig. 5 and 6, the pipe body includes two pipe sections, namely a first pipe section 51 and a second pipe section 52, and the second pipe section 52 is bent relative to the first pipe section 51, in this case, one end of the first pipe section 51 far away from the second pipe section 52 is a first end 5a of the pipe body, and one end of the second pipe section 52 far away from the first pipe section 51 is a second end 5b of the pipe body. More specifically, as can be seen from fig. 5, the second pipe section 52 is bent 90 ° relative to the first pipe section 51, in this case, the bend 5 is a 90 ° bend, and when the material flows through the bend 5, the bend has a relatively sharp bend, a relatively high pressure, and a relatively high requirement for wear resistance and blockage prevention, so that the effect of improving the smoothness of material transportation of the bend 5 with the spatial curve as the axis is more obvious in this embodiment.

In addition, in order to facilitate the disassembly and assembly of the elbow pipe 5, the elbow pipe 5 and the hopper 4 and/or the conveying pipe 6 can be detachably connected in a hinged or threaded manner.

In fig. 4 to 5, the bent pipe 5 is a circular pipe, and the cross section of the pipe body is circular, but as a modification, the bent pipe 5 may be other forms such as a square pipe or a special pipe, that is, the cross section of the pipe body may be other shapes such as a square or a special shape. Meanwhile, the elbow 5 may have a constant wall thickness or a variable wall thickness or a constant diameter or a variable diameter, and the joint between the first pipe section 51 and the second pipe section 52 may transition in a curved line (such as an arc) or a straight line, which do not form a particular limitation to the present invention.

In addition, in this embodiment, a concrete pump truck is taken as an example, and the first end 5a and the second end 5b of the elbow pipe 5 are connected to the hopper 4 and the delivery pipe 6, respectively, but it should be understood that, when the working vehicle is another working vehicle such as a guniting truck, the first end 5a may be connected to other working vehicle than the hopper 4, and the second end 5b may be connected to other working vehicle than the delivery pipe 6. In fact, the first end 5a and the second end 5b can be connected to any first material handling element and second material handling element, respectively, as long as the first material handling element, the bend 5 and the second material handling element are arranged in succession in the material handling direction.

The above description is only exemplary embodiments of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An elbow (5) characterized by comprising a tube body having a hollow tube cavity inside, and a central axis (5c) of the tube cavity being a spatial curve.

2. The elbow (5) according to claim 1, characterized in that the pipe body comprises a first pipe section (51) and a second pipe section (52), the second pipe section (52) being bent in relation to the first pipe section (51), and that the end of the first pipe section (51) remote from the second pipe section (52) is a first end (5a) of the pipe body, and the end of the second pipe section (52) remote from the first pipe section (51) is a second end (5b) of the pipe body.

3. An elbow (5) according to claim 2, characterized in that the second pipe section (52) is bent 90 ° in relation to the first pipe section (51).

4. The elbow (5) according to claim 1, characterized in that the cross section of the tube body is circular.

5. A material conveying device comprising a first material conveying member and a second material conveying member, characterized by further comprising an elbow (5) according to any one of claims 1-4, the first material conveying member, the elbow (5) and the second material conveying member being arranged in sequence along a material conveying direction, a first end (5a) and a second end (5b) of the tubular body being connected to the first material conveying member and the second material conveying member, respectively, and the second end (5b) of the tubular body being higher than the first end (5a) of the tubular body.

6. A material transfer arrangement as in claim 5, characterised in that the normal to the end surface of the first end (5a) of the tubular body is perpendicular to the surface of the first material transfer element for connection to the tubular body.

7. The material conveying device according to claim 5, characterized in that the first material conveying member is a hopper (4); and/or the second material conveying piece is a conveying pipe (6).

8. A material conveying device according to claim 5, characterised in that the elbow (5) is detachably connected to at least one of the first material conveying member and the second material conveying member.

9. A working vehicle comprising a chassis (7), characterized in that it further comprises a material conveying device according to any one of claims 5-8, which is arranged on the chassis (7).

10. The engineering vehicle of claim 9, wherein the engineering vehicle is a concrete pump truck or a shotcrete truck.