CN203286190U

CN203286190U - Concrete transportation wear-resisting elbow and concrete pump truck

Info

Publication number: CN203286190U
Application number: CN2013202387842U
Authority: CN
Inventors: 张鹏程; 冯敏; 李效龙
Original assignee: Xuzhou XCMG Schwing Machinery Co Ltd
Current assignee: Xuzhou XCMG Schwing Machinery Co Ltd
Priority date: 2013-05-06
Filing date: 2013-05-06
Publication date: 2013-11-13
Anticipated expiration: 2023-05-06

Abstract

The utility model relates to a concrete transportation wear-resisting elbow and a concrete pump truck. The elbow is a single-layer concrete transportation elbow and comprises an inner wall and an outer wall. A pit is arranged on the arc-shaped inner surface of the outer wall in a dug mode, the pit is placed on the largest-curvature position of the inner surface of the outer wall and extends towards two sides along the position; a wear-resisting layer is boned to the pit. The concrete transportation wear-resisting elbow has the advantages of being simple in technology, low in cost, easy to popularize and good in wear resistance, impact resistance, toughness and stability.

Description

A kind of concrete conveyance abrasion-proof bent tube and concrete mixer

Technical field

The utility model relates to engineering machinery field, relates in particular to a kind of concrete conveyance abrasion-proof bent tube and is provided with the concrete mixer of this concrete conveyance abrasion-proof bent tube.

Background technique

Concrete mixer refers to be equipped with simultaneously on the motor vehicle chassis machinery of concrete pumping unit and distributing arm support.The delivery pipe bend pipe that uses on concrete mixer is commonly referred to concrete conveying elbow pipe, is mainly used in changing the arc pipe of concrete flows.Because the structural type of concrete conveying elbow pipe is varied, but its position that impacted by concrete is generally the position of from the mid point of circular arc, to both sides, extending, the mid point of circular arc is the impact maximum that the position of curvature maximum is subject to, therefore wearing and tearing are the most serious, along with reducing of the curvature of circular arc, the degree of wear diminishes gradually.

What Fig. 1 showed is the generalized section of individual layer concrete conveying elbow pipe in prior art.As shown in Figure 1, traditional concrete conveying elbow pipe is quenching manganese steel pipe, and cast inblock forms, and the thickness of outer wall 1 ' and inwall 2 ' is different.The internal surface of outer wall 1 ' is the main region that is subjected to concrete impact and friction, its serious wear, easily puncture, the minor details arm penultimate concrete conveying elbow pipe of concrete mixer particularly, more easily puncture, therefore the thickness of making is usually larger, such as: 18mm, 15mm and 12.5mm etc., thus make the overall weight of concrete conveying elbow pipe lay particular stress on.Because inwall 2 ' wearing and tearing are lighter, therefore relative outer wall 1 ', thickness is relatively less than normal, is about 7.5mm.

What Fig. 2 showed is the generalized section of composite double layer concrete conveying elbow pipe in prior art.As shown in Figure 2, outer tube 3 ' and 4 ' material are high tenacity low-carbon (LC) seamless steel pipe or aluminum alloy, and toughness and impact resistance are better than the concrete conveying elbow pipe in Fig. 1.Inner tube 5 ' and 6 ' material are the high abrasion fine ceramics, ceramic inner pipe is to utilize high temperature resistant powerful viscose glue alumina ceramic plate to be sticked on the inwall of outer tube 3 ' and 4 ', then form wearing layer through heating cure, manufacturing process is complicated, manufacturing cycle is long, and the stupalith price is more expensive, and cost is higher.But the composite double layer concrete conveying elbow pipe has that hardness is high, wear resistance good, impact resistance is strong, smooth surface and lightweight advantage.

In addition, due to concrete mixer easily plugging in practical work process, and concrete conveying elbow pipe is easily damaged parts, frequency of maintenance is higher, the concrete mixer miantainers tend to adopt the percussion power of different sizes to remove to knock pipeline,, to fix a breakdown, guarantee the work of concrete mixer safety and stability.Although the hardness of ceramic inner pipe is high, wear resistance is good, and impact resistance is strong, and poor toughness is knocked easy fragmentation, sticks on outer tube wall because pottery utilizes high temperature resistant powerful viscose glue again, beats easily and comes off, and therefore is difficult for the maintenance of concrete mixer.

The model utility content

The purpose of this utility model be propose a kind of lightweight, the life-span is long, and low concrete conveyance abrasion-proof bent tube and the concrete mixer of cost.

For achieving the above object, the utility model provides following technological scheme:

A kind of concrete conveyance abrasion-proof bent tube, described bend pipe is the individual layer concrete conveying elbow pipe, comprises inner and outer wall; Wherein: the circular arc internal surface of described outer wall has dug a pit, and described pit is positioned at the position of described outer wall interior surface curvature maximum, and along this position, to both sides, extends; On described pit in conjunction with one deck wearing layer.

Further, described welding wear-resistant layer is connected on described pit.

Further, the internal surface of described wearing layer and described outer wall is one-body molded.

Further, the degree of depth of described pit is 3-5mm.

Further, the length of described wearing layer is 1/2 of whole described outer wall overall length.

The utility model also provides a kind of concrete mixer, and it comprises the described concrete conveyance abrasion-proof bent tube in the various embodiments described above.

Based on the arbitrary technological scheme in technique scheme, the utility model embodiment can produce following technique effect at least:

The utility model digs pit by the zone that the outer wall internal surface at the individual layer concrete conveying elbow pipe is vulnerable to concrete impact and wearing and tearing most, and on this pit the build-up wear-resistant layer, or one-body molded wearing layer, because the individual layer concrete conveying elbow pipe that digs pit is still formed by the tratitional technology casting, therefore not only technique is simple, cost is lower, is easy to promote, but also has all advantages preferably of wear resistance, impact resistance, toughness and stability.

In addition, the utility model also adopts ripe welding procedure to carry out the build-up wear-resistant material at pit, this technique is not only comparatively simple, can also extend the working life of this conveyance conduit, and wearing layer is combined closely with outer wall, even if the concrete mixer miantainers adopt larger percussion power to remove to knock pipeline, wearing layer can not split away off from outer wall yet, thus less frequency of maintenance.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not form improper restriction of the present utility model.In the accompanying drawings:

Fig. 1 is the generalized section of individual layer concrete conveying elbow pipe in prior art;

Fig. 2 is the generalized section of composite double layer concrete conveying elbow pipe in prior art;

Fig. 3 is the generalized section after concrete conveyance abrasion-proof bent tube provided by the utility model digs pit;

Fig. 4 is the generalized section of concrete conveyance abrasion-proof bent tube bonded wear-resistant layer provided by the utility model;

Mark in figure: 1 ', outer wall; 2 ', inwall; 3 ', outer tube; 4 ', outer tube; 5 ', inner tube; 6 ', inner tube; 1, inwall; 2, outer wall; 3, pit; 4, wearing layer.

Embodiment

Below by drawings and Examples, the technical solution of the utility model is described in further detail.

Because being subject to zone that concrete impacts, concrete conveying elbow pipe is generally the zone of from the mid point of the circular arc internal surface of pipeline outer wall, to both sides, extending, the mid point of circular arc is the position of curvature maximum, the impact that this position is subject to is maximum, therefore wearing and tearing are the most serious, along with reducing of the curvature of circular arc, the degree of wear diminishes gradually.

As shown in Figure 3, Figure 4, these characteristics according to concrete conveying elbow pipe, the utility model has dug a pit 3 at the circular arc internal surface of the outer wall 2 of individual layer concrete conveying elbow pipe, pit 3 is positioned at the position of outer wall 2 interior surface curvature maximums, and along this position, to both sides, extend, and end at from 2 two sides of outer wall and count 1/4 place that is positioned at outer wall 2 overall lengths, therefore, the length of wearing layer 4 is almost 1/2 of whole outer wall 2 overall lengths.That is to say the region division pit 3 that the most easily is hit and weares and teares the most serious in the inside of outer wall 2.

The weight that is provided with the individual layer concrete conveying elbow pipe of pit 3 has obtained alleviating, and in the present embodiment, the depth bounds of pit 3 is 3-5mm, and this degree of depth also can be carried out free adjusting according to the actual conditions demand, is not limited in the utility model scope of disclosure.The individual layer concrete conveying elbow pipe adopts the manganese steel material, be made into the uneven texture of above inwall 1 and outer wall 2 by the cast-in-block mode, outer wall 2 is than the outer wall of individual layer concrete conveying elbow pipe of the prior art 2 thin (as shown in Figure 1), thereby the overall weight of conveyance conduit is alleviated.

For the wearing and tearing that withstand concrete impact and accumulate over a long period, be combined with one deck wearing layer 4 on pit 3, wearing layer 4 can be connected on the surface of pit 3 by the mode of welding, also can be one-body molded with the internal surface of outer wall 2.By at pit 3, wearing layer 4 being set, thereby make this zone wear resistance, impact resistance, toughness and stability better, and wearing layer 4 is with outer wall 2 in conjunction with tight, even if the concrete mixer miantainers adopt larger percussion power to remove to knock pipeline, wearing layer 4 can not split away off from outer wall 2 yet.

In the various embodiments described above, the material of wearing layer 4 can be selected wear resistance electrode, wear resistant alloy material or rich chromium cast iron etc.

The utility model digs pit by the zone that the outer wall internal surface at the individual layer concrete conveying elbow pipe is vulnerable to concrete impact and wearing and tearing most, and on this pit the build-up wear-resistant layer, or one-body molded wearing layer, because the individual layer concrete conveying elbow pipe that digs pit is still formed by the tratitional technology casting, technique is simple, cost is lower, is easy to promote.In addition, also adopt ripe welding procedure to carry out build-up wear-resistant material (such as wear resistance electrode or integrated antifriction metal (AFM)) at pit.The results show: the life-span of concrete conveying elbow pipe provided by the utility model has increased 3 times, and performance improves, and the cost increase seldom.

The utility model also provides a kind of concrete mixer, and concrete mixer comprises the concrete conveyance abrasion-proof bent tube in the various embodiments described above.The other parts of described concrete mixer can be with reference to prior art, and this paper no longer launches to describe.After concrete mixer adopted concrete conveyance abrasion-proof bent tube provided by the utility model, frequency of maintenance reduced, and has saved the man power and material.

Should be noted that finally: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although with reference to preferred embodiment, the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can modify or the part technical characteristics is equal to replacement embodiment of the present utility model; And not breaking away from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technological scheme scope that the utility model asks for protection.

Claims

1. concrete conveyance abrasion-proof bent tube, described bend pipe is the individual layer concrete conveying elbow pipe, comprises inwall (1) and outer wall (2); It is characterized in that: the circular arc internal surface of described outer wall (2) has dug a pit (3), and described pit (3) is positioned at the position of described outer wall (2) interior surface curvature maximum, and along this position, to both sides, extends; Described pit (3) is upper in conjunction with one deck wearing layer (4).

2. concrete conveyance abrasion-proof bent tube as claimed in claim 1, it is characterized in that: described wearing layer (4) is welded on described pit (3).

3. concrete conveyance abrasion-proof bent tube as claimed in claim 1 is characterized in that: described wearing layer (4) is one-body molded with the internal surface of described outer wall (2).

4. concrete conveyance abrasion-proof bent tube as claimed in claim 2 or claim 3, it is characterized in that: the degree of depth of described pit (3) is 3-5mm.

5. concrete conveyance abrasion-proof bent tube as claimed in claim 2 or claim 3, it is characterized in that: the length of described wearing layer (4) is 1/2 of whole described outer wall (2) overall length.

6. a concrete mixer, is characterized in that: comprise concrete conveyance abrasion-proof bent tube as described in any one in claim 1-5.