Pile side annular grouting valve

Abstract

The utility model discloses a pile side annular grouting valve which is characterized in that a plurality of grout outlets are formed in an annular pipe, and protective sleeves are attached to the peripheries of the grout outlets; a vertical feeding pipe is arranged at the upper part of the annular pipe and is communicated with the annular pipe, a spring blocking piece is arranged in the vertical feeding pipe, one end of a spring is blocked by the spring blocking piece, the other end of the spring is extruded on a sealing piece, and the sealing piece is extruded at the lower part of the feeding hole; a plurality of slurry through holes are formed in the upper part of the spring blocking piece; and a locking part fixed with the outside is arranged at the top end of the vertical feeding pipe. The utility model adopts the steel ring pipe design, is mounted on the outer side of the ground pile, has high loading capacity, ensures that the grout outlet direction is fixed to the outer side of the pile wall, adopts the semicircular design, is convenient for field installation, and can realize high-pressure grout injection and reverse backflow blocking of grout by virtue of the built-in one-way check valve; the pressure maintaining time of slurry in soil around the ground pile can be effectively prolonged, and the reinforcing effect on the ground pile is promoted.

Description

Technical Field

[0001] The utility model belongs to the technical field of grouting valves in the field of construction, and in particular relates to a pile-side annular grouting valve for preventing concrete backflow. Background Art

[0002] During the construction of ground pile casting, the commonly used casting process is to erect a steel cage in the base. This steel cage is formed by combining horizontal circular steel bars and vertical steel bars and then pouring concrete. After the ground pile is cast, additional pouring or secondary pouring is carried out at the junction of the side of the ground pile and the soil. Its purpose is to achieve an extended connection between the surrounding area of ​​the ground pile and the soil casting, thereby improving the casting strength of the ground pile.

[0003] In the prior art, the device used to assist in the secondary pouring is a rubber tube, through which high-pressure mortar is released around the formed ground piles, and the soil around the ground piles is driven away by the high-pressure slurry, so that the slurry and the ground piles are combined, and at the same time, the slurry can be promoted to penetrate into the soil and form a whole with the soil. However, the technical problem currently encountered by this construction process is that during the secondary high-pressure grouting, the slurry will not be absorbed instantly after injection, and it needs to be combined with the soil and the surrounding of the ground piles within a certain period of time. If the above-mentioned rubber tube or metal tube is open, it is impossible to form a pressure-maintaining state, causing the high-pressure slurry to flow back, and the actual required effect of the secondary grouting cannot be achieved. Moreover, because the existing feed pipes of this type are mostly rubber hoses, they cannot meet the above-mentioned high-pressure requirements.

[0004] Therefore, in response to the above technical problems, as technical personnel in this industry, the technical problem that urgently needs to be solved is: to design and develop a pile-side annular grouting valve, which can realize secondary grouting around the ground pile, and on the premise of ensuring the grouting pressure, it can prevent the slurry from flowing backwards after grouting, thereby ensuring the reinforcement effect of the secondary grouting. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the utility model proposes a pile-side annular grouting valve, which can effectively prevent the reverse flow of slurry while ensuring the pressure supply strength by providing an annular material pipe and a reverse check structure in the material pipe.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A pile side annular grouting valve, comprising an annular tube, the annular tube is provided with a plurality of grout outlets; a vertical feed pipe is provided on the upper part of the annular tube and is connected with the annular tube, a spring stopper is provided in the vertical feed pipe, the spring stopper blocks one end of the spring, the other end of the spring is pressed on the sealing member, the sealing member is pressed on the lower part of the feed port, and the sealing member is arranged between the spring stopper and the feed port;

[0008] The spring stopper is set through, and a plurality of slurry holes are arranged on its upper part; a locking part fixed to the outside is arranged on the top of the vertical feed pipe, and the locking part is a plug-in section or a threaded section or a welding section; a protective sleeve is attached to the periphery of the slurry outlet.

[0009] The annular tube is designed in sections, and each adjacent section is fixed together by a clamp, and a sealing gasket is arranged between the clamp and the annular tube; the inner side of the clamp ring and the junction of the annular tube are concave-convex plug-in fit.

[0010] The sealing element is a combination of a sealing ball and a baffle with holes or a combination of a sealing ball and a reducing port.

[0011] The outer periphery of the protective sleeve is fitted with an adhesive, and the protective sleeve is secondarily fixed to the outer periphery of the slurry outlet through the adhesive. This structure can prevent the protective sleeve from being offset due to friction resistance when the annular grouting valve on the pile side is lowered.

[0012] The locking portion is processed by shrinking the tube, and its diameter is smaller than the main body diameter of the vertical feed tube.

[0013] The utility model has the following beneficial effects: the utility model is provided with a plurality of slurry outlets on the annular tube, and a protective sleeve is attached to the outer periphery of the slurry outlet; a vertical feeding pipe is provided on the upper part of the annular tube and is connected with the annular tube, a spring blocking member is provided in the vertical feeding pipe, the spring blocking member blocks one end of the spring, and the other end of the spring is squeezed on the sealing member, the sealing member is squeezed on the lower part of the feed port, and the sealing member is arranged between the spring blocking member and the feed port; the spring blocking member is arranged through, and a plurality of slurry through holes are arranged on the upper part thereof; a locking portion fixed to the outside is arranged at the top of the vertical feeding pipe. Through the above structural arrangement, the utility model adopts a steel annular tube design, which is installed on the outside of the ground pile, has a high pressure bearing capacity, and the slurry outlet direction is fixed to the outside of the pile wall. The semicircular design is adopted for easy on-site installation, and a built-in one-way check valve can realize high-pressure injection of slurry, and at the same time, reverse backflow of the slurry is blocked, which can effectively prolong the pressure holding time of the slurry in the soil around the ground pile, and promote the reinforcement effect of the ground pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of a vertical feed pipe;

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the clamp locking part;

[0018] Figure 4for Figure 2 A schematic diagram of the enlarged structure of the middle A area;

[0019] Figure 5 for Figure 3 A magnified schematic diagram of the structure of the middle B region;

[0020] Figure 6 This is a schematic diagram of the use state of the utility model;

[0021] In the figure, 1, ground pile reinforcement cage, 11, horizontal ring reinforcement, 12, vertical reinforcement;

[0022] Annular tube, 21, tube body, 22, slurry outlet, 23, protective sleeve, 24, covering belt, 25, concave ring;

[0023] 3. vertical feeding pipe, 31. spring blocking member, 32. slurry through hole, 33. spring, 34. blocking ball, 35. reducing port, 36. locking part, 37. feeding port;

[0024] 4. a hoop, 41. a hoop, 42. a locking plate, 43. a locking hole, 44. a projection;

[0025] 5. Sealing gasket. DETAILED DESCRIPTION

[0026] The present invention is further described below through an implementation method. Those skilled in the art should understand that what is disclosed here is only a specific implementation case of the present technical solution. Those skilled in the art can understand the present technical solution based on the content disclosed in the following case, and can make further technical extensions based on the understanding of the present technical solution. If such technical extension covers the present technical solution as a whole, it should fall within the scope of protection of this patent.

[0027] As shown in the attached figure, a pile side annular grouting valve is used in Figure 1 On the ground pile reinforcement cage 1, usually, a pile-side annular grouting valve is fixed on the periphery of the ground pile reinforcement cage 1, and secondary grouting is achieved through the pile-side annular grouting valve after the ground pile is cast and tested. Example

[0028] As shown in the accompanying drawings, a pile-side annular grouting valve includes an annular tube 2, on which a plurality of slurry outlets 22 are provided; a vertical feed pipe 3 is provided on the upper portion of the annular tube 2 and is connected to the annular tube 2. Normally, technicians in this field process a hole on the upper portion of the annular tube 2 and weld the vertical feed pipe 3 above the hole.

[0029] A spring stopper 31 is provided in the vertical feed pipe 3. In this embodiment, the spring stopper 31 is a plate-shaped stainless steel sheet or a U-shaped cover with a slurry through hole 32, which is a vertical through-design. A spring 34 is provided above the spring stopper 31. One end of the spring 34 is blocked by the spring stopper 31, and the other end of the spring 34 is pressed on the seal. The seal is pressed on the lower part of the feed port 37. The seal is a combination of a blocking ball 34 and a perforated baffle or a combination of a blocking ball 34 and a reducing port 35. In this embodiment, the sealing member adopts a combination of a blocking ball 34 and a reducing port 35, and the blocking ball 34 is provided between the spring stopper 31 and the feed port 36.

[0030] A locking portion 36 fixed to the outside is provided on the top end of the vertical feed pipe 3, and the locking portion 36 is a plug-in section, a threaded section, or a welding section. In the present embodiment, the locking portion 36 adopts a threaded section or a smooth plug-in section structure. When a smooth plug-in section structure is adopted, it is fixed to the external feed pipe for a second time by plugging and then welding. When a thread is adopted, it can be threadedly connected to the external feed pipe with the aid of a transition locking piece.

[0031] In this embodiment, the locking portion 36 of the vertical feed pipe 3 is processed by shrinking the tube, and its diameter is smaller than the main body diameter of the vertical feed pipe. This shrinking tube design can realize the forming of the reducing port 35, and the reducing port 35 can cooperate with the blocking ball 34 to form a seal.

[0032] The utility model arranges a protective sleeve 23 on the outer periphery of the slurry outlet 22 on the annular tube 2, and the protective sleeve is used to prevent gravel and soil from entering the slurry outlet 22; such protective sleeve is usually made of rubber or plastic material, and during use, after the ground pile is cast and prefabricated, high-pressure cement slurry is poured into the vertical feed pipe 3 through an external high-pressure feed pipe, and when the cement slurry enters the annular tube 2 and the slurry pressure is high enough to destroy the protective sleeve 23, the high-pressure cement fluid impacts the sealing ball 34 and the reducer 35 to separate to form an open state of the one-way valve, and slurry is supplied to the ground pile through the one-way valve here. When the slurry supply is completed, the slurry supply is stopped, and the sealing ball 34 is reversely fitted under the action of the spring 34 to achieve sealing.

[0033] Furthermore, the outer periphery of the protective sleeve 23 is fitted with an adhesive. The adhesive in this embodiment is an adhesive covering tape 24, and the protective sleeve 23 is fixed to the outer periphery of the annular tube 2 for a second time through the covering tape 24. This structure can prevent the protective sleeve 23 from being offset due to friction resistance when the annular grouting valve on the pile side is lowered.

[0034] When the utility model is installed in a ring around the outer periphery of the ground pile reinforcement cage 1, if it is directly installed through the ring structure, it is impossible to smoothly move down the outer periphery of the ground pile reinforcement cage 1. In order to facilitate the construction of personnel, the applicant designs the annular pipe 2 in sections, and each adjacent two sections of the pipe body 21 are fixed to one body through a clamp 4, such as Figure 5 As shown, the hoop 4 comprises a hoop ring 41 with an annular opening and two locking plates 42 at the bottom of the hoop ring 41, and locking and fixing are achieved by the two locking plates 42. Those skilled in the art can realize the assembly and forming of the annular tube 2 by on-site assembly.

[0035] After the utility model is assembled on site, it brings convenience to the actual construction, but there is a risk of leakage or loosening in the joint area of ​​the clamp 4 during assembly and use. The utility model further improves the above structure, and designs the joint between the inner side of the clamp ring 41 of the clamp 4 and the annular tube 2 as a concave-convex plug-in matching structure, such as Figure 6 As shown, a protrusion 44 is provided on the inner side surface of the hoop ring 41, and a concave ring 25 matching with the protrusion 44 is provided on the outer diameter of the annular tube 2. After assembly, the hoop ring 41 is first matched with the annular tube 2, and then a rubber sealing gasket 5 is provided between the hoop ring 41 and the annular tube 2. After the two locking plates 42 are locked and fixed, axial anti-separation is achieved through the concave-convex plug-in matching structure, and anti-seepage and anti-leakage after assembly are achieved through the sealing gasket 5.

[0036] To sum up, the utility model adopts the above structural setting, which adopts a steel ring pipe design and is installed on the outside of the ground pile. It has a high pressure-bearing capacity, and the slurry discharge direction is fixed to the outside of the ground pile wall. The semicircular design is convenient for on-site installation, and the built-in one-way check valve can realize high-pressure injection of slurry and block the reverse backflow of the slurry at the same time, which can effectively prolong the pressure holding time of the slurry in the soil around the ground pile and promote the reinforcement effect of the ground pile.

Claims

1. A pile side annular grouting valve, characterized in that: It comprises an annular tube, on which a plurality of pulp outlets are arranged; a vertical feed pipe is arranged on the upper part of the annular tube and is connected with the annular tube, a spring stopper is arranged in the vertical feed pipe, the spring stopper blocks one end of the spring, the other end of the spring is pressed on the sealing member, the sealing member is pressed on the lower part of the feed port, and the sealing member is arranged between the spring stopper and the feed port; The spring stopper is set through, and a plurality of slurry holes are arranged on its upper part; a locking part fixed to the outside is arranged on the top of the vertical feed pipe, and the locking part is a plug-in section or a threaded section or a welding section; a protective sleeve is attached to the periphery of the slurry outlet.

2. A pile side annular grouting valve as claimed in claim 1, characterized in that: The annular tube is designed in sections, and each adjacent section is fixed together by a clamp, and a sealing gasket is arranged between the clamp and the annular tube; the inner side of the clamp ring and the junction of the annular tube are concave-convex plug-in fit.

3. A pile side annular grouting valve as claimed in claim 1, characterized in that: The sealing element is a combination of a sealing ball and a baffle with holes or a combination of a sealing ball and a variable diameter port.

4. A pile side annular grouting valve as claimed in claim 1, characterized in that: The outer periphery of the protective sleeve is fitted with an adhesive, and the protective sleeve is secondarily fixed to the outer periphery of the slurry outlet through the adhesive.

5. A pile-side annular grouting valve as claimed in claim 1, characterized in that: The locking portion is processed by shrinking the tube, and its diameter is smaller than the main body diameter of the vertical feed tube.

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