Non-return grouting valve

Abstract

The utility model discloses a non-return grouting valve, which is characterized in that a grout outlet is arranged on a vertical pipe, a spring blocking part with a penetrating structure is arranged in the vertical pipe corresponding to the grout outlet, the spring blocking part blocks one end of a spring, the other end of the spring is extruded on a sealing element, and the sealing element is extruded on a feed port. The sealing piece is arranged between the slurry outlet and the feeding hole; a locking part fixed with the outside is arranged on the vertical pipe, and the locking part is an inserting section or a threaded section or a welding section; and when the slurry outlet is formed in the side part of the vertical pipe, a protective sleeve is attached to the periphery of the slurry outlet. By means of the structural arrangement, the device can be installed at the bottom end or the top of a vertical grouting pipe, reverse backflow blocking is carried out on injected grout, the pressure maintaining time of the grout in soil around a ground pile can be effectively prolonged, the reinforcing effect on the ground pile is promoted, meanwhile, the device can be used as auxiliary equipment for ultrasonic detection, and the practicability is high. And a flaw detection device does not need to be additionally mounted.

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 non-return grouting valve for preventing concrete backflow. Background Art

[0002] During the construction of ground pile casting, the commonly used casting process is to set up a steel cage in the base, such as Figure 1 As shown, this type of steel cage is combined with horizontal annular steel bars and vertical steel bars. When the steel bars are combined, vertical grouting pipes are set around the steel cage. Its purpose is to perform additional pouring or secondary pouring on the joint at the bottom of the steel cage after the ground pile is poured. Its purpose is to achieve one-piece pouring around the ground pile and effectively ensure the pouring strength of the ground pile. At the same time, after the first pouring and before the second pouring, the vertical grouting pipe is required to perform ultrasonic testing of the internal strength of the ground pile.

[0003] In the prior art, this type of vertical grouting pipe is set outside the steel cage. During the secondary pouring, the slurry is injected through high-pressure equipment. The purpose is to drive away the soil around the piles through the high-pressure slurry, so that the slurry and the piles can be combined, and at the same time, the slurry can be promoted to penetrate into the soil and form a whole with the soil. The technical problem currently encountered 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 piles within a certain period of time. If the vertical grouting pipe 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.

[0004] In response to the above technical problems, as technical personnel in this industry, the technical problem that urgently needs to be solved is: it is urgent to design and develop a check grouting valve, which can realize grouting around the ground piles, and at the same time prevent the slurry from flowing back after grouting, so as to ensure the reinforcement effect of the secondary grouting. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the utility model proposes a non-return grouting valve, which can effectively prevent the reverse flow of slurry by providing a material pipe and a reverse non-return structure in the material pipe.

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

[0007] A non-return grouting valve, comprising a vertical pipe, on which a slurry outlet is arranged; corresponding to the slurry outlet, a spring blocking part is arranged in the vertical pipe, the spring blocking part blocks one end of the spring, and the other end of the spring is pressed on a sealing member, the sealing member is pressed on the lower part of the feed inlet, and the sealing member is arranged between the slurry outlet and the feed inlet;

[0008] A locking portion fixed to the outside is provided on the top end of the vertical tube, and the locking portion is a plug-in section, a threaded section, or a welding section;

[0009] When the slurry outlet is arranged on the side of the vertical pipe, a protective sleeve is attached to the outer periphery of the slurry outlet.

[0010] The sealing element comprises a combination of a sealing ball and a baffle with holes or a combination of a sealing ball and a variable diameter 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 vertical pipe through the adhesive. This structure can prevent the protective sleeve from being offset due to friction resistance when the check grouting valve 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 tube.

[0013] The bottom end of the vertical pipe is designed as a taper, and the slurry outlet is arranged at the upper part of the tapered end. The discharge end of the vertical pipe can be arranged at the bottom to the greatest extent.

[0014] The vertical tube is provided with a thickened structure in the middle, and the overall supporting strength is improved by the thickened area.

[0015] The top of the vertical pipe is provided with a top reduction section, and the top reduction section is provided with an external thread. The external thread is provided with a locking nut, a gasket and an expansion ring from top to bottom; the side of the vertical pipe is provided with a slurry outlet, and the bottom end of the vertical pipe is provided with a support member that can penetrate vertically; after the vertical pipe is vertically inserted into the vertical grouting pipe, the expansion ring can be used to achieve the fit and fixation of the non-return grouting valve and the vertical pipe.

[0016] The utility model has the following beneficial effects: the utility model is provided with a slurry outlet on the vertical pipe, and a spring blocking part of a penetrating structure is provided in the vertical pipe corresponding to the slurry outlet, the spring blocking part blocks one end of the spring, and the other end of the spring is pressed on the sealing part, the sealing part is pressed on the feed port, and the sealing part is arranged between the slurry outlet and the feed port; the vertical pipe is provided with a locking part fixed to the outside, and the locking part is a plug-in section or a threaded section or a welding section; when the slurry outlet is arranged on the side of the vertical pipe, a protective sleeve is attached to the outer periphery of the slurry outlet. Through the above structural arrangement, the utility model can be installed at the bottom or top of the vertical grouting pipe to block the reverse backflow of the injected slurry, which can effectively prolong the pressure holding time of the slurry in the soil around the ground pile, promote the reinforcement effect of the ground pile, and can also be used as an auxiliary equipment for ultrasonic detection, without the need to install a flaw detection device separately; the device has a novel structural design and is simple to operate, and can effectively reinforce and cast the ground pile, and the pressure holding and anti-reverse effect is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the exterior structure of the ground pile reinforcement cage;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of Example 1;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of Example 2;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of Example 3;

[0022] Figure 5 This is a schematic diagram of the front cross-sectional structure of Example 1;

[0023] Figure 6 This is a schematic diagram of the front cross-sectional structure of Example 2;

[0024] Figure 7 This is a schematic diagram of the front cross-sectional structure of Example 3;

[0025] Figure 8 for Figure 6 A schematic diagram of the enlarged structure of the middle A area;

[0026] Fig. 9 This is a schematic diagram of the use status of the utility model Figure Ⅰ ;

[0027] Fig.10 This is a schematic diagram of the use status of the utility model Figure II ;

[0028] Fig.11 This is a schematic diagram of the use status of the utility model Figure III ;

[0029] Fig.12 for Fig.10 A schematic diagram of the structure of the middle B region;

[0030] Fig.13 for Fig.10 A magnified schematic diagram of the structure of the middle C region;

[0031] In the figure, 1, ground pile reinforcement cage, 11, horizontal ring reinforcement, 12, vertical reinforcement, 13, vertical grouting pipe, 14, small tunnel guide tube;

[0032] 2. vertical tube, 21. tube body, 22. baffle with holes, 221. circular hole, 23. slurry outlet on the side wall, 24. cone head, 25. thickened tube diameter, 26. slurry outlet on the bottom;

[0033] 3. Locking part, 31. Variable diameter area, 32. Locking nut, 33. Washer, 34. Expanding support ring, 35. Feeding port, 36. Peripheral reinforcement ring;

[0034] 4. Block the ball;

[0035] 5. Spring;

[0036] 6. Protective sleeve, 61. Covering belt;

[0037] 7. Spring blocking ring, 71. Through hole;

[0038] 8. Tapered through connector. DETAILED DESCRIPTION

[0039] 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.

[0040] As shown in the attached figure, a check grouting valve is used in Figure 1 The ground pile reinforcement cage 1 is used. Usually, a vertical grouting pipe 13 is arranged on the periphery of the ground pile reinforcement cage 1. The product disclosed in the utility model is arranged at the top or bottom of the vertical grouting pipe 13 for use.

[0041] Example 1: Use in vertical grouting pipe

[0042] like Figure 1 , 4 As shown, a non-return grouting valve includes a vertical pipe 2, wherein the vertical pipe is a pipe body 21 with a top shrinkage design, the bottom end of the pipe body 21 is a taper design, and the bottom end is blocked to form a cone head 24, and four side wall slurry outlets 23 are arranged on the side wall of the vertical pipe 2, and the four side wall slurry outlets 23 are evenly distributed on the outer wall of the vertical pipe 2.

[0043] Corresponding to the side wall slurry outlet 23, a spring blocking part is arranged in the vertical tube 2. In this embodiment, the spring blocking part is the inner diameter of the cone head 24, and one end of the spring 5 is blocked by the inner diameter of the cone head 24. The other end of the spring 5 is squeezed on the seal, and the seal is extruded and arranged at the lower part of the feed port 35. The seal is arranged between the side wall slurry outlet 23 and the feed port 35.

[0044] In this embodiment, the sealing member comprises a combination of a sealing ball 4 and a perforated baffle plate 22. A circular hole 221 is provided at the center of the perforated baffle plate 22. The sealing ball 4 seals the circular hole 221 under the pressure of a spring, thereby achieving sealing of the forward grouting.

[0045] The top of the vertical pipe 2 is provided with a locking portion 3 fixed to the outside. The locking portion 3 is a shrink tube structure. The locking portion 3 has a smooth outer diameter or is welded with a peripheral reinforcement ring 36 on the outer diameter. The user can achieve the combination of the vertical pipe 2 and the bottom of the vertical grouting pipe 13 by plugging. After the combination, the peripheral reinforcement welding can be performed by welding. The purpose of setting the peripheral reinforcement ring 36 is to increase the welding angle and welding area, and improve the bonding strength between the vertical pipe 2 and the bottom of the vertical grouting pipe 13.

[0046] Furthermore, those skilled in the art can also process external threads on the periphery of the locking portion 3, such as Fig.11 As shown, the vertical pipe 2 and the vertical grouting pipe 13 can be connected with the help of a tapered through connector 8. The tapered through connector 8 is a rotating body component with an outer tapered design and an internal thread, which only serves as a transition component for connecting the vertical pipe 2 and the vertical grouting pipe 13.

[0047] Furthermore, the side wall slurry outlet 23 is preferably arranged at the upper part of the tapered end. This design can arrange the discharge end of the vertical pipe 2 at the bottom to the greatest extent.

[0048] A protective sleeve 6 is fitted around the outer periphery of the side wall slurry outlet 23, and the protective sleeve is used to prevent gravel and soil from entering the inside of the side wall slurry outlet 23; this protective sleeve is usually made of rubber or plastic. During use, after the pile is cast and prefabricated, high-pressure cement fluid is poured into the vertical grouting pipe 13. When the cement fluid pressure is high enough to destroy the protective sleeve 6, the high-pressure cement fluid impacts the sealing ball 4 and the perforated baffle 22 to separate and form a one-way valve open state, and slurry is supplied to the bottom of the vertical grouting pipe 13 through the one-way valve here. When the slurry supply is completed, the slurry supply is stopped, and the sealing ball 4 and the perforated baffle 22 are reversely fitted under the action of the spring 5 to achieve sealing.

[0049] Furthermore, the outer periphery of the protective sleeve 6 is fitted with an adhesive. The adhesive in this embodiment is an adhesive covering tape 61, and the protective sleeve 6 is fixed to the outer periphery of the vertical pipe for a second time through the covering tape 61. This structure can prevent the protective sleeve 6 from being offset due to friction resistance when the check grouting valve is lowered.

[0050] like Fig. 9 As shown, when the vertical pipe 2 is inserted, not all vertical grouting pipes 13 are provided with a check valve at the bottom, and at least one vertical grouting pipe 13 must be reserved for placing the ultrasonic detection sensor device.

[0051] Example 2: Dual use of acoustic testing and grouting

[0052] As in Example 1 Fig. 9 As shown, after the pile is formed, in order to ensure its forming quality, ultrasonic testing of the pile foundation is usually carried out by an ultrasonic testing device before secondary grouting to prevent defects such as cracks and sand holes inside the pile foundation. As shown in Example 1, when the check valve and the vertical pipe 2 are inserted, not all vertical grouting pipes 13 are provided with a check valve at the bottom, and at least one vertical grouting pipe 13 must be reserved for placing the ultrasonic testing sensor device. Therefore, this design increases the testing cost and requires a reserved work station for ultrasonic testing, which affects the secondary pouring effect at the bottom of the pile.

[0053] like Figure 3 , 6 As shown in Figure 10, in this embodiment, the vertical tube 2 is thickened. To facilitate the installation of the vertical grouting pipe 13, the locking portion 3 at the top of the vertical tube 2 is also shrunk so that the diameter of the locking portion 3 is smaller than the diameter of the tube body 21 in the middle of the vertical tube 2. At this time, the vertical tube 2 is a thickened structure in the middle, and the overall support strength is improved by the thickened area. After this structural setting, the vertical tube 2 can not only improve the overall support strength, but also effectively realize the vertical movement of the ultrasonic sensor in the vertical tube 2 and can fall to the bottom of the vertical tube 2, as shown in Figure 10. Fig.10 As shown, those skilled in the art can directly perform ultrasonic testing through the thickened check grouting valve.

[0054] The check grouting valve is a design that combines the bored pile acoustic detection pipe and the grouting pipe. The check grouting valve of this design has high bearing strength and is not prone to breakage. The built-in one-way check valve has a maximum pressure bearing capacity of 10 MPa. The check valve is set at the bottom, and the ultrasonic detection probe can effectively reach the bottom of the pile foundation. The valve body is designed with high fluidity.

[0055] Example 3: Small catheter only

[0056] Further structural expansion of the utility model, such as Figure 4 , 7 As shown in Figure 11, the top of the vertical pipe 2 is provided with a locking portion 3, and the locking portion 3 is a top shrinkage section, and the top shrinkage section is provided with an external thread, and the external thread is provided with a locking nut 32, a gasket 33 and an expansion support ring 34 from top to bottom; the side of the vertical pipe 2 is provided with a side wall slurry outlet 23, and the bottom end of the vertical pipe 2 is provided with a support member that can pass vertically; after the vertical pipe 2 is vertically inserted into the vertical grouting pipe 13, the gasket 33 can be squeezed by hanging the locking nut 32 to finally squeeze the expansion support ring 34 outward at the variable diameter area 31, thereby realizing the extrusion combination with the vertical grouting pipe 13. This fixed structure is used as shown in the following figure. Fig.11 shown.

[0057] The product disclosed in this embodiment 3 is suitable for the grouting design of the small tunnel duct 14 and the small slope duct. It is usually fixed at the pipe end of the small tunnel duct 14 or the small slope duct. The grouting hole is quickly locked through the expansion principle. After the grouting is completed, the slurry can be effectively prevented from flowing back. The pressure bearing capacity can reach 6-7 MPa.

[0058] In summary, the non-return grouting valve disclosed in this patent application has a novel structural design and is easy to operate. It can effectively reinforce and cast ground piles and has a stable pressure-maintaining and non-returning effect.

Claims

1. A non-return grouting valve, characterized in that: It includes a vertical tube, on which a pulp outlet is arranged; corresponding to the pulp outlet, a spring blocking part is arranged in the vertical tube, the spring blocking part blocks one end of the spring, and the other end of the spring is pressed on the sealing member, the sealing member is pressed on the lower part of the feed inlet, and the sealing member is arranged between the pulp outlet and the feed inlet; A locking portion fixed to the outside is provided on the top end of the vertical tube, and the locking portion is a plug-in section, a threaded section, or a welding section; When the slurry outlet is arranged on the side of the vertical pipe, a protective sleeve is attached to the outer periphery of the slurry outlet.

2. A check grouting valve according to 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 reducing port.

3. A check grouting valve according to 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 vertical pipe through the adhesive.

4. A check grouting valve according to 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 tube.

5. A check grouting valve according to claim 1, characterized in that: The bottom end of the vertical pipe is designed as a taper, and the slurry outlet is arranged at the upper part of the tapered end.

6. A check grouting valve according to claim 1, characterized in that: The vertical tube is provided with a thickened structure in the middle, and the overall supporting strength is improved by the thickened area.

7. A check grouting valve according to claim 1, characterized in that: The top of the vertical pipe is provided with a top reduction section, and the top reduction section is provided with an external thread. The external thread is provided with a locking nut, a gasket and an expansion ring from top to bottom; the side of the vertical pipe is provided with a slurry outlet, and the bottom end of the vertical pipe is provided with a support member that can penetrate vertically; after the vertical pipe is vertically inserted into the vertical grouting pipe, the expansion ring can be used to achieve the fit and fixation of the non-return grouting valve and the vertical pipe.

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