Pile head breaking structure used before initial setting of concrete

Abstract

The utility model provides a pile breaking head structure used before initial setting of concrete, and relates to the field of pile breaking machinery, the pile breaking head structure comprises a material suction pipe and a material suction head, the output end of the material suction pipe is used for connecting a negative pressure suction mechanism, the material suction head is fixedly connected to the input end of the material suction pipe, and the opening of the material suction head faces downwards and is communicated with the interior of the material suction pipe; at least one notch is formed in the side wall of the material suction head and close to the lower port of the material suction head; by arranging the material suction head with the notch structure, when the pile head breaking structure is used for breaking a pile head, especially breaking an uncondensed concrete pile head, pulpified concrete can be smoothly sucked into the material suction opening under the air flow coercing effect generated at the notch under the negative pressure suction effect, construction is easy, the pile head breaking effect is good, and the pile head breaking effect is good. The problem that the suction effect is affected due to the fact that the suction port is easily blocked due to the fact that the viscosity of the concrete is large when a plain-end suction port in the prior art is used for suction operation on uncoagulated concrete is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction machinery, and particularly relates to a pile head breaking structure for concrete before initial setting, which is applicable to pile head removal of pile foundations for bridge, building and other pile foundation projects. Background Technique

[0002] At present, when pouring and casting concrete bridge piers in engineering construction, the top elevation of the cast-in-place pile should be 0.8 - 2.0 m higher than the designed pile top elevation to ensure the strength of the pile head concrete. However, the pile head part higher than the designed pile top elevation must be chiseled off during the subsequent construction process. The work of chiseling off this part of the concrete pile head is pile head breaking.

[0003] Pile head breaking usually adopts manual or mechanical methods to break the super-cast concrete at the pile top after the concrete has solidified. Although the speed of mechanical pile head breaking is many times faster than that of manual work, there are large environmental pollutions during the process of mechanical pile head breaking and the process of handling the broken pile head. When lifting the broken pile head, it poses a great safety risk to construction workers.

[0004] In the prior art, the utility model patent with the publication number of CN212670568U discloses a pile head breaking device for concrete before initial setting, and proposes that after the cast-in-place pile is poured and before the concrete initial sets, the device is placed inside the super-cast part of the cast-in-place pile. When breaking, water or mud enters the conduit through the feed pipe and is ejected from the vertical spray pipe and the lateral spray pipe at the lower end of the conduit, so as to dilute and cut the concrete inside the pile head of the cast-in-place pile. However, the device still has the following problems during actual construction:

[0005] 1. When using this device, it is necessary to first insert it inside the super-cast part of the cast-in-place pile. Limited by the performance of the concrete such as different setting times and slumps, especially for concrete with a low slump, it is very difficult to perform this insertion action, so it is difficult to carry out subsequent operations and the construction difficulty is great.

[0006] 2. This device uses the vertical spray pipe and the lateral spray pipe to jointly spray water or mud, but it is not applicable to this action when it is about 20 cm or more above the pile foundation elevation. The reason is that the water ejected from the vertical spray pipe easily destroys the proportion of the pile foundation concrete, thereby affecting the strength of the pile foundation. Especially when spraying mud, it is more likely to affect the strength of the pile foundation. In addition, there is a certain distance between the nozzles of the vertical spray pipe and the lateral spray pipe in the horizontal direction, which is likely to cause a central construction dead angle. Moreover, the spray pipe can wash away the ash and sand components in the concrete, but it is difficult to achieve the effect of scouring and breaking the stones in it. Therefore, the device cannot complete the complete breaking of the pile head.

[0007] 3. This device is only used for diluting and cutting the concrete around the nozzle. According to the construction requirements of breaking the pile head, usually, the diluted and cut concrete also needs to be collected and transported. Therefore, corresponding collection and transportation devices need to be additionally configured, which is not conducive to the synchronous collection of pile head breaking construction and waste materials.

[0008] Therefore, there is an urgent need to develop a pile head breaking structure for pre-setting concrete, which is easy to construct, has a good pile head breaking effect, and can synchronously collect waste materials. Summary of the Utility Model

[0009] The utility model provides a pile head breaking structure for pre-setting concrete in view of the above problems existing in the prior art.

[0010] The technical solution of the utility model to solve the above technical problems is as follows: A pile head breaking structure for pre-setting concrete, characterized in that it includes a suction pipe and a suction head. The output end of the suction pipe is used to connect to a negative pressure suction mechanism. The suction head is fixedly connected to the input end of the suction pipe. The suction head opens downward and is internally connected to the suction pipe. At least one notch is provided on the side wall of the suction head, near its lower port.

[0011] In the above technical solution, especially the design of the notch structure is aimed at sucking and removing the unhardened concrete and the slurry-like materials to be sucked, such as those in oil fields and sedimentation tanks. The design background is as follows: The conventional suction head structure is generally a flat mouth or a serrated mouth, that is, the above notch structure is not provided. This type of structure has a good effect when sucking ground soil base materials. However, when applied to unhardened concrete and slurry-like materials in oil fields, sedimentation tanks, etc., the inventor found that because such substances are more viscous and less fluid than conventional ground soil base materials, when using the conventional flat mouth or serrated mouth suction head structure for suction, the suction port is frequently blocked by the sucked materials, resulting in the inability to smoothly complete the suction. Workers need to frequently manually shift the suction head to continue working, seriously affecting the suction effect and work efficiency. Instead, using a suction head with a notch structure can achieve a good suction effect on concrete-like substances.

[0012] In a preferred technical solution of the utility model, it further includes a high-pressure nozzle and a water supply pipeline connected to the high-pressure nozzle. The high-pressure nozzle is fixedly connected to the outside of the suction head, at the end side of the notch. The nozzle of the high-pressure nozzle protrudes downward from the bottom suction port of the suction head. The water spraying area of the high-pressure nozzle is located outside the notch. When it is difficult to suck the materials through the suction port due to factors such as concrete solidification, the water supply pipeline can be started and high-pressure water can be supplied. The high-pressure water flow ejected from the high-pressure nozzle is used to cut and break the materials below the concrete surface outside the notch, and then smoothly sucked into the suction port through the notch.

[0013] Furthermore, a high-pressure nozzle is respectively arranged on both end sides of the notch, and the nozzles of the two high-pressure nozzles are arranged opposite to each other.

[0014] Furthermore, the nozzles of the two high-pressure nozzles arranged opposite to each other on both end sides of the notch are arranged in a vertically staggered manner.

[0015] Furthermore, the high-pressure nozzle is of a fan-shaped nozzle structure, and the high-pressure water flow ejected therefrom is in a fan-shaped surface.

[0016] Furthermore, the bottom of the high-pressure nozzle is of an inverted conical structure.

[0017] Further, the notch is in an arch shape or a square arch shape.

[0018] Further, the material suction head is of a flared structure.

[0019] Further, the water supply pipeline includes a main pipeline, an intermediate pipeline and a branch pipeline that are connected in sequence. The main pipeline is fixed on the material suction pipe. The intermediate pipeline is of an annular channel structure and is fixed at the connection between the material suction pipe and the material suction head. The branch pipeline is fixed on the outer wall of the material suction head, and each high-pressure nozzle is respectively connected to a branch pipeline.

[0020] The beneficial effects of the present utility model are as follows:

[0021] 1. By means of the material suction pipe of the externally connected suction mechanism and the material suction head with a notch structure connected to the input end of the material suction pipe provided in the present utility model, when the pile head breaking structure breaks the pile head, especially when breaking the unhardened concrete pile head, the air flow entrainment effect generated at the notch under the negative pressure suction action can smoothly suck the pulpy concrete into the material suction port. The construction is easy, the pile head breaking effect is good, and the waste can be collected through the material suction pipe synchronously. At the same time, the problem that the suction port is blocked due to the large viscosity of the concrete when sucking the unhardened concrete by using the flat suction port of the prior art, which affects the suction effect, is solved.

[0022] 2. Further, by means of the high-pressure nozzle structure additionally installed at a specific position and with a specific nozzle orientation in the present utility model, in combination with the material suction head with a notch structure, the materials below the concrete surface outside the notch can be cut and broken by means of the high-pressure water flow when needed, so as to smoothly suck and discharge the materials through the material suction port.

[0023] 3. The pile head breaking structure of the present utility model can be applied not only to the suction of unhardened concrete, but also to the suction and removal of pulpy materials under working conditions such as oil fields and sedimentation tanks. Description of the Drawings

[0024] Figure 1 It is the front view structural schematic diagram of the pile head breaker in an embodiment of the present utility model;

[0025] Figure 2 is Figure 1 a schematic cross-sectional structure diagram;

[0026] Figure 3 is a schematic structure diagram of the present utility model in a usage state of an embodiment;

[0027] In the figure: 1. Suction pipe, 2. Suction head, 21. Suction port, 3. Water supply pipeline, 31. Main pipeline, 32. Intermediate pipeline, 33. Branch pipeline, 4. High-pressure nozzle, 41. Nozzle opening, 5. Notch. Specific embodiments

[0028] The principles and features of the present utility model will be described below. The examples given are only used to explain the present utility model and are not used to limit the scope of the present utility model.

[0029] As Figure 1 and Figure 2 shown, the structure for breaking the pile head before the initial setting of concrete in this embodiment includes a suction pipe 1 and a suction head 2. The output end of the suction pipe 1 is used to connect to a negative pressure suction mechanism. The suction head 2 is fixedly connected to the input end of the suction pipe 1. The suction head 2 in this embodiment has a horn-shaped structure. The horn-shaped structure increases the suction range of the suction port under the condition of a certain diameter of the suction pipe 1. The suction head 2 opens downward and is internally connected to the suction pipe 1. At least one notch 5 is provided on the side wall of the suction head 2 near its lower port; as Figure 3 shown, two opposite notches 5 are provided in this embodiment. The shape of the notch 5 can be Figure 1 the arched shape shown. In other embodiments, the shape of the notch 5 can also be set as a square arch.

[0030] After the concrete is poured and the cement slurry backflow ends and impurities fall into the pile head, when the pile head has not yet set, the structure for breaking the pile head in this embodiment is used to perform a suction operation on the pile head part with more slurry and impurities, and all the higher parts of the pile head are sucked out, so as to remove the pile head part containing too much water slurry and with soil.

[0031] During use, the suction pipe 1 is connected to a negative pressure suction mechanism, and the water supply pipeline 3 is connected to a high-pressure water supply system. The suction head is placed on the surface of the pile head concrete, so that the suction port 21 of the suction head 2 just contacts the slurry-concrete mixture at the top of the pile. See Figure 3As shown, start the negative pressure suction to suck the slurry concrete mixture into the material suction port 21 and discharge it to the corresponding storage system. Since there are openings 5 on both sides of the suction head 2, at this time, under the action of negative pressure suction, the air flow passes through the openings 5 at a high speed. Due to the entrainment effect of the air flow, it is beneficial to smoothly suck the material into the material suction port, quickly suck the slurry concrete mixture at the pile top into the storage system, and gradually suck out all the concrete in the elevated part of the pile head. While completing the pile head breaking, the collection of materials is realized, and the construction is convenient. The pile head breaking effect is complete and will not affect the self-performance of the cast-in-place pile. Compared with the conventional flat mouth type material suction port structure (i.e., without the opening 5) in the prior art, this solution can effectively solve the problem that when using the flat mouth type material suction port to suck the unhardened concrete, the suction port is easily blocked by the sucked material due to the large viscosity of the concrete, which affects the suction effect.

[0032] On the basis of the above embodiment, in another preferred embodiment of the present invention, the pile head breaking structure further includes a high-pressure nozzle and a water supply pipeline 3 connected to the high-pressure nozzle. The high-pressure nozzle 4 is fixedly connected to the outside of the suction head 2, at the end side of the opening 5. The nozzle of the high-pressure nozzle 4 protrudes below the bottom of the suction head 2 of the material suction port, and the water spraying area of the high-pressure nozzle 4 is located outside the opening. The high-pressure nozzle 4 can adopt a fan-shaped nozzle structure or a columnar nozzle structure.

[0033] The advantage of this solution is that when encountering a certain degree of solidification and hardening of the concrete, due to its poor fluidity and suspension, it is difficult for the suction head to suck. Start the high-pressure water supply system to make the high-pressure water spray out from the water supply pipeline 3 through the high-pressure nozzle 4, perform high-pressure water flow cutting on the material outside the opening, break the adhered material, and make the material smoothly suck into the suction head through the opening.

[0034] In a preferred embodiment of the present invention, a high-pressure nozzle 4 is respectively arranged at both end sides of the opening 5, and the nozzles of the two high-pressure nozzles 4 are arranged oppositely. The nozzles of the two high-pressure nozzles 4 arranged oppositely at both end sides of the opening 5 are arranged in a vertically staggered manner, as shown in Figure 1 As shown, it is more conducive to cutting the concrete block. Correspondingly, the water supply pipeline 3 includes a main pipeline 31, an intermediate pipeline 32 and a branch pipeline 33 connected in sequence. The main pipeline 31 is fixed on the outer wall of the suction pipe 1, the intermediate pipeline 32 is a ring channel structure and is fixed at the connection between the suction pipe 1 and the suction head 2, and the branch pipeline 33 is fixed on the outer wall of the suction head 2. Each high-pressure nozzle 4 is respectively connected to a branch pipeline 33.

[0035] In a preferred embodiment of the present invention, to facilitate inserting the high-pressure nozzle 4 below the concrete surface, the bottom of the high-pressure nozzle 4 is provided with an inverted conical structure.

Claims

1. A pile head breaking structure used before initial setting of concrete, characterized in that: The invention comprises a suction pipe (1) and a suction head (2), wherein the output end of the suction pipe (1) is used to connect to a negative pressure suction mechanism, and the suction head (2) is fixedly connected to the input end of the suction pipe (1), the suction head (2) is opened downward and communicates with the inside of the suction pipe (1), and at least one notch (5) is provided on the side wall of the suction head (2) near its lower end.

2. The pile head breaking structure for concrete before initial setting according to claim 1 is characterized in that: It also comprises a high-pressure nozzle (4) and a water supply pipeline (3) connected to the high-pressure nozzle (4); the high-pressure nozzle (4) is fixedly connected to the outside of the suction head (2) and is located at the end side of the notch (5); the nozzle of the high-pressure nozzle (4) protrudes downward from the suction port at the bottom end of the suction head (2); and the water spraying area of ​​the high-pressure nozzle (4) is located outside the notch.

3. The pile head breaking structure for concrete before initial setting according to claim 2 is characterized in that: A high-pressure nozzle (4) is respectively arranged on both end sides of the notch (5), and the nozzles of the two high-pressure nozzles (4) are arranged opposite to each other.

4. The pile head breaking structure for concrete before initial setting according to claim 3 is characterized in that: The nozzles of the two high-pressure nozzles (4) arranged opposite to each other at the two ends of the notch (5) are arranged in an up-and-down staggered manner.

5. The pile head breaking structure for concrete before initial setting according to claim 2 is characterized in that: The high-pressure nozzle (4) is a fan-shaped nozzle structure.

6. The pile head breaking structure for use before initial setting of concrete according to any one of claims 2 to 5, characterized in that: The bottom of the high-pressure nozzle (4) is in an inverted cone-shaped structure.

7. The pile head breaking structure for use before initial setting of concrete according to claim 1 or 2, characterized in that: The notch (5) is in an arch shape or a square arch shape.

8. The pile head breaking structure for concrete before initial setting according to claim 1 or 2, characterized in that: The material suction head (2) is in a trumpet-shaped structure.

9. The pile head breaking structure for concrete before initial setting according to claim 2, characterized in that: The water supply pipeline (3) comprises a main pipeline (31), an intermediate pipeline (32) and a branch pipeline (33) which are connected in sequence, and each high-pressure nozzle (4) is respectively connected to a branch pipeline (33).

10. The pile head breaking structure for concrete before initial setting according to claim 9, characterized in that: The intermediate pipeline (32) is an annular channel structure.

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