Air-lift reverse circulation slurry suction head device

Abstract

The present invention discloses an air-lift reverse circulation slurry suction head device, which includes a main housing. A plurality of slurry suction ports are arranged around the main housing. An upper frustum part is provided at the upper part of the main housing. The upper end of the upper frustum part is connected with an upper conduit joint. An air bag cavity housing is arranged on the upper frustum part. An air bag cavity is formed between the air bag cavity housing, the upper frustum part and the upper conduit joint. The air bag cavity is provided with air bag exhaust holes along the side wall of the upper conduit joint. An air pipe joint is arranged on the air bag cavity housing. The air bag cavity, the air bag exhaust holes, the main housing and the slurry suction ports constitute an air-lift reverse circulation system. After high-pressure air is sent into the air bag cavity housing through the air pipe joint, it is mixed with the slurry in the air bag cavity. After being inflated, a pressure area is generated in the air bag cavity. The pressure difference between the inside and outside of the continuously inflated slurry suction head increases continuously. When a certain pressure difference is reached, the balance is broken, and then the slurry is forced to return and spray out through the slurry suction ports and the conduit joint under the action of high pressure.

Description

Technical Field

[0001] The present invention relates to the field of pile foundations, and particularly to an air-lift reverse circulation slurry suction head device. Background Art

[0002] At present, the traditional method of air-lift reverse circulation hole cleaning for pile foundations is to insert a galvanized pipe about 2 / 3 of the hole depth into the conduit to send high-pressure air into the conduit at a depth of 2 / 3 of the hole, mix with the slurry in the conduit, generate a low-pressure area in the conduit after inflation, continuously increase the pressure difference inside and outside the continuously inflated conduit. When a certain pressure difference is reached, the balance is broken, forcing the slurry to return and spray upward from the conduit under high pressure. At the same time, the bottom-hole rock debris is carried by the high-speed slurry and ejected from the conduit to the hole opening.

[0003] This traditional construction method has the following disadvantages:

[0004] 1. The slurry can only be sucked out from the lower opening of the conduit, the hole cleaning range is small, and the conduit needs to be moved regularly.

[0005] 2. The cleaning effect of the mud skin and residue between the steel reinforcement cage and the hole wall is not ideal. Summary of the Invention

[0006] In order to overcome the deficiencies of the prior art, one of the purposes of the present invention is to provide an air-lift reverse circulation slurry suction head device, which can solve the problems of small hole cleaning range and unsatisfactory residue cleaning effect.

[0007] One of the purposes of the present invention is achieved by adopting the following technical solutions:

[0008] An air-lift reverse circulation slurry suction head device includes a main housing. The main housing is provided with a plurality of slurry suction ports around the perimeter. The upper part of the main housing is provided with an upper frustum part. The upper end of the upper frustum part is connected to an upper conduit joint. An air bag cavity housing is arranged on the upper frustum part. An air bag cavity is formed between the air bag cavity housing, the upper frustum part and the upper conduit joint. The air bag cavity is provided with air bag exhaust holes along the side wall of the upper conduit joint. An air pipe joint is arranged on the air bag cavity housing.

[0009] Further, the slurry suction port is an inclined hole. The main housing includes a cylindrical section, an upper frustum part and a lower frustum part. The two ends of the cylindrical section are respectively connected to the upper frustum part and the lower frustum part. The slurry suction port is located in the cylindrical section.

[0010] Further, the air-lift reverse circulation slurry suction head device further includes an inner frustum. The inner frustum is arranged inside the main housing. The inner frustum protrudes upward and the opening position of the slurry suction port faces the inner frustum.

[0011] Further, a lower through hole is provided at the lower part of the lower frustum part.

[0012] Further, the cylindrical section is vertically arranged, and the height of the upper frustum is greater than that of the lower frustum.

[0013] Further, a fixing ring is arranged at the upper end of the upper conduit joint, and the fixing ring is provided with a plurality of fixing holes.

[0014] Further, the air-lift reverse circulation slurry suction head device further includes a plurality of hanging lugs, and the hanging lugs are connected to the upper frustum.

[0015] Further, the air bag cavity housing includes an upper annular sheet and a barrel-shaped side wall. The upper annular sheet is connected to the barrel-shaped side wall, and the lower part of the barrel-shaped side wall is connected to the main housing.

[0016] Further, the air bag exhaust hole is an inclined hole.

[0017] Further, the number of the air bag exhaust holes is 3 - 5.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] An upper conduit joint is connected to the upper end of the upper frustum. An air bag cavity housing is arranged on the upper frustum. An air bag cavity is formed between the air bag cavity housing, the upper frustum and the upper conduit joint. The air bag cavity is provided with air bag exhaust holes along the side wall of the upper conduit joint. An air pipe joint is arranged on the air bag cavity housing. The air bag cavity, the air bag exhaust holes, the main housing and the slurry suction port form an air-lift reverse circulation system. After high-pressure air is sent into the air bag cavity housing through the air pipe joint, it is mixed with the slurry in the air bag cavity. After being inflated, a pressure area is generated in the bag cavity. The pressure difference inside and outside the continuous inflation slurry suction head increases continuously. When a certain pressure difference is reached, the balance is broken, and then the slurry is forced to return and spray out through the slurry suction port and the conduit joint under high pressure. At the same time, the bottom-hole rock debris is carried by the high-speed slurry from around the slurry suction head through the structure of the slurry suction port and returns and sprays out of the hole opening through the conduit joint. It can effectively clean the mud skin and residues between the steel reinforcement cage and the pile foundation hole wall, without the need to move the position of the conduit joint regularly, and can avoid the situation of the conduit jamming the steel reinforcement cage, solving the problems of a small hole cleaning range and an unsatisfactory residue cleaning effect.

[0020] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following preferred embodiments are specifically given, and in conjunction with the drawings, the details are described as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the internal structure diagram of a preferred embodiment in the air-lift reverse circulation slurry suction head device of the present invention;

[0022] Figure 2 For Figure 1 the structural diagram of the air-lift reverse circulation slurry suction head device shown in the figure;

[0023] Figure 3 It is a physical diagram.

[0024] In the figure: 10, main housing; 11, slurry suction port; 12, upper frustum part; 13, lower frustum part; 14, lower through hole; 20, upper conduit joint; 30, air bag cavity housing; 31, air bag cavity; 32, air pipe joint; 40, suspension ear plate; 60, inner frustum. Specific implementation manners

[0025] Next, in combination with the accompanying drawings and specific implementation manners, the present invention will be further described. It should be noted that, on the premise of no conflict, any combination can be formed among the following-described embodiments or technical features.

[0026] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0028] Please refer to Figures 1-3A gas lift reverse circulation slurry suction head device comprises a main shell 10, wherein the main shell 10 is provided with a plurality of slurry suction ports 11 around the main shell 10, an upper frustum portion 12 is provided on the upper portion of the main shell 10, an upper conical portion 12 is connected with an upper conduit joint 20 at the upper end of the upper frustum portion 12, an air bag cavity shell 30 is provided on the upper frustum portion 12, an air bag cavity body 31 is formed between the air bag cavity shell 30, the upper frustum portion 12 and the upper conduit joint 20, the air bag cavity body 31 is provided with air bag exhaust holes along the side wall of the upper conduit joint 20, and an air pipe joint 32 is provided on the air bag cavity shell 30. The air bag cavity 31, the air bag exhaust hole, the main shell 10 and the slurry suction port 11 constitute an air lift reverse circulation system. After the high-pressure air is sent into the air bag cavity shell 30 through the air pipe joint 32, it is mixed with mud in the air bag cavity 31. After inflation, a pressure zone is generated in the cavity. The pressure difference between the inside and outside of the continuous inflation slurry suction head increases continuously. When a certain pressure difference is reached, the balance is broken, and the mud is forced to be ejected through the slurry suction port 11 and the catheter joint under the action of high pressure. At the same time, the rock residue at the bottom of the hole is carried by the high-speed mud from all around the slurry suction head through the structure of the slurry suction port 11 and is ejected from the hole through the catheter joint. The mud skin and residue between the steel cage and the wall of the pile foundation hole can be effectively cleaned. There is no need to move the position of the catheter joint regularly, which can avoid the situation where the catheter is stuck in the steel cage, solving the problems of a small hole cleaning range and unsatisfactory residue cleaning effect.

[0029] Specifically, when implementing the method of air lift reverse circulation hole cleaning pile foundation corresponding to the device of the present application, the steps are: a. The vehicle crane hangs the slurry suction head by wire rope to the hanging ear plate to align it; b. Use the vehicle crane to extend the conduit and the air pipe, and gradually extend them to the bottom of the pile foundation; c. Perform air lift reverse circulation hole cleaning.

[0030] Preferably, the slurry suction port 11 is an oblique hole, the main shell 10 includes a cylindrical section, an upper frustum portion 12, and a lower frustum portion 13, the two ends of the cylindrical section are respectively connected to the upper frustum portion 12 and the lower frustum portion 13, and the slurry suction port 11 is located in the cylindrical section. The slurry suction port 11 is elliptical, and the slurry suction head can be connected to two air ducts, which can make the air pressure difference larger and the slurry suction capacity stronger.

[0031] Preferably, the air lift reverse circulation slurry suction head device also includes an inner cone 60, which is arranged inside the main shell 10. The inner cone 60 is protruding along the upper part and the opening position of the slurry suction port 11 is facing the inner cone 60. The lower part of the lower cone part 13 is provided with a lower through hole 14. The setting of "inner cone 60, lower through hole 14" provides a certain effect on cleaning mud skin and residue between the steel cage and the hole wall.

[0032] Preferably, the cylindrical section is arranged vertically, the height of the upper frustum 12 is greater than that of the lower frustum 13, a fixing ring is provided at the upper end of the upper conduit joint 20, and the fixing ring is provided with a plurality of fixing holes, which solves the problem of inconvenient installation.

[0033] Preferably, the air-lift reverse-circulation grout suction head device further includes a plurality of suspension lugs 40, and the suspension lugs 40 are connected to the upper frustum 12. The function of the suspension lugs 40 is to facilitate the hoisting of the grout suction head during use.

[0034] Preferably, the air bag cavity housing 30 includes an upper annular piece and a barrel-shaped side wall, the upper annular piece is connected to the barrel-shaped side wall, and the lower part of the barrel-shaped side wall is connected to the main housing 10. The air bag exhaust hole is an inclined hole. The number of the air bag exhaust holes is 3-5. The whole device has a compact structure, novel structure, ingenious design, strong applicability and is convenient for popularization.

[0035] The above embodiments are only the preferred embodiments of the present invention, and the scope of protection of the present invention cannot be limited thereby. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention belong to the scope of protection required by the present invention.

Claims

1. An air-lift reverse circulation slurry suction head device, comprising a main housing, characterized in that: A plurality of slurry suction ports are provided around the main housing. An upper frustum is provided at the upper part of the main housing. An upper conduit joint is connected to the upper end of the upper frustum. An air bag cavity housing is provided on the upper frustum. An air bag cavity is formed between the air bag cavity housing, the upper frustum and the upper conduit joint. An air bag exhaust hole is provided along the side wall of the upper conduit joint in the air bag cavity. An air pipe joint is provided on the air bag cavity housing.

2. The air-lift reverse circulation grout suction head device according to claim 1, characterized in that: The slurry suction port is an inclined hole. The main housing comprises a cylindrical section, an upper frustum and a lower frustum. The two ends of the cylindrical section are respectively connected to the upper frustum and the lower frustum. The slurry suction port is located in the cylindrical section.

3. The air-lift reverse circulation grout suction head device according to claim 2, characterized in that: The air-lift reverse circulation slurry suction head device further comprises an inner frustum, which is arranged inside the main housing. The inner frustum protrudes upwards and the opening position of the slurry suction port faces the inner frustum.

4. The air-lift reverse circulation slurry suction head device according to claim 2, wherein: A lower through hole is provided at the lower part of the lower frustum.

5. The air-lift reverse circulation grout suction head device according to claim 2, wherein: The cylindrical section is vertically arranged, and the height of the upper frustum is greater than that of the lower frustum.

6. The air-lift reverse circulation grout suction head device according to claim 1, characterized in that: A fixing ring is provided at the upper end of the upper conduit joint, and the fixing ring is provided with a plurality of fixing holes.

7. The air-lift reverse circulation grout suction head device according to claim 1, characterized in that: The air-lift reverse circulation slurry suction head device further comprises a plurality of suspension lugs, which are connected to the upper frustum.

8. The air-lift reverse circulation grout suction head device according to claim 1, wherein: The air bag cavity housing comprises an upper annular piece and a barrel-shaped side wall. The upper annular piece is connected to the barrel-shaped side wall, and the lower part of the barrel-shaped side wall is connected to the main housing.

9. The air-lift reverse circulation grout suction head device according to claim 1, characterized in that: The air bag exhaust hole is an inclined hole.

10. The air-lift reverse circulation grout suction head device according to claim 9, characterized in that: The number of the air bag exhaust holes is 3 - 5.

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