A grouting stop valve

Abstract

This application discloses a grouting stop valve, which is a rotating structure made of elastic material, including a top, middle and tail section arranged coaxially in sequence. The grouting stop valve has a hollow cavity inside. The end face of the top protrudes in the direction away from the middle section, and a through slit is opened at the apex of the end face. After the through slit deforms and opens, it connects to the outside and the cavity. The tail section has an insertion port that communicates with the cavity and is used for inserting a grouting gun at the end away from the top. This grouting stop valve is used for grouting construction and can improve the problem of poor sealing when using traditional wooden plugs.

Description

Technical Field

[0001] This application relates to the field of grouting equipment technology, and in particular to a grouting stop valve. Background Technology

[0002] Grouting connection using rebar sleeves is one of the main methods of rebar connection in prefabricated buildings. It achieves a reliable connection of the rebars by injecting high-strength mortar into the sleeve. During the grouting process, grout is injected through injection holes, and after grouting, the injection holes must be sealed to ensure connection strength. Currently, the industry commonly uses a grouting gun for injection followed by manual sealing.

[0003] In the current process of grouting rebar sleeves, the nozzle is inserted into the grouting hole for grouting. After grouting is completed, the nozzle is removed and the grouting hole is sealed with a wooden plug. However, the wooden plug method does not provide a good seal, and grout will leak out from the gaps. Summary of the Invention

[0004] A grout stop valve is provided to address the problem of grout leakage due to poor sealing of the grouting hole when using traditional wooden plugs.

[0005] The above-mentioned objective of this utility model is achieved through the following technical solution: A grouting stop valve is characterized by having a rotating body structure made of elastic material, comprising a top, a middle and a tail arranged coaxially in sequence. The grout stop valve has a hollow internal cavity. The top end face protrudes in the direction away from the middle, and a through slit is opened at the apex of the end face. After the through slit is deformed and opened, it connects to the outside world and the receiving cavity. The tail end facing away from the top has an insertion port that communicates with the accommodating cavity and allows the grouting gun to be inserted.

[0006] By adopting the above technical solution, the grout stop valve is pressed into the grouting hole before grouting. After the grouting gun is inserted into the grout stop valve from the insertion port at the tail, the grouting increases the pressure in the accommodating cavity, causing the grout stop valve to undergo elastic deformation, which expands the gap to allow the grout to pass through. After grouting is completed, the gun head is pulled out, and the gap automatically closes to form a seal. Under the grouting pressure, the gap is opened, and the grout flows out smoothly. The grouting and stopping functions are integrated, the operation is simple, and the sealing performance is improved.

[0007] Optionally, the top end face is an elliptic parabola.

[0008] By adopting the above scheme, the top end face is an elliptical paraboloid, which is more conducive to opening and closing the gap, and can reduce the resistance when inserting into the channel, making it easier to install and position, and also easier to insert into the grouting hole.

[0009] Optional, the seam can be cross-shaped.

[0010] By adopting the above technical solution, during grouting, the cross valve is propped open under the action of pump pressure, forming an unobstructed slurry flow channel; after the grouting is completed and the pressure is released, the valve automatically closes relying on the elasticity of the material and the pressure of external slurry, effectively preventing slurry backflow, having strong anti-blocking capability, and achieving superior pressure resistance and sealing performance.

[0011] Optionally, an uneven texture structure is provided on the outer layer of the middle part.

[0012] By adopting the above technical solution, the texture structure increases the friction between the grouting check valve and the contact surface of the grouting hole wall or concrete, effectively preventing the valve body from being pushed out reversely or displaced by high-pressure slurry when the grouting pressure increases or the equipment vibrates, and enhances the stability of the grouting check valve in the working state.

[0013] Optionally, the raised part of the texture structure is higher than the highest point of the top part.

[0014] By adopting the above technical solution, interference fit is realized, and the friction between the grouting check valve and the grouting hole is further increased.

[0015] Optionally, the texture structure is a spiral thread.

[0016] By adopting the above technical solution, the adoption of spiral thread texture increases friction and prevents withdrawal on one hand; on the other hand, the spiral thread will generate a downward rotating component force when the valve body is pressed into the grouting hole, making the installation process more labor-saving and smoother.

[0017] Optionally, a groove is provided on the inner surface of the tail part.

[0018] By adopting the above technical solution, after the grouting is finished and the slurry is solidified, a corresponding hook can be used to take out the grouting check valve through the groove provided at the tail part.

[0019] Optionally, the groove is an annular groove surrounding the inner surface of the tail part for one circle.

[0020] By adopting the above technical solution, the annular groove ensures the uniformity of contraction and expansion of the tail sleeve in the circumferential direction, which enables the valve body to be smoothly guided in during installation and to be uniformly stressed during taking out, avoids jamming, twisting or tearing caused by unilateral stress concentration, and makes both the installation and taking out processes smoother and more reliable.

[0021] Optionally, the cross-section of the groove is L-shaped.

[0022] By adopting the above technical solution, the L-shaped cross-section groove facilitates taking out the grouting check valve with an n-shaped hook, and the corner of the L-shaped groove can better disperse the stress generated in repeated installation and taking out cycles, prolonging the service life of the valve body and ensuring the stability of its performance.

[0023] In summary, this application has at least the following beneficial effects: Before grouting, the grout stop valve is pressed into the grouting hole. After the grouting gun is inserted into the grout stop valve, the grouting causes the grout stop valve to undergo elastic deformation through grouting, which expands the gap to allow the grout to pass through. After grouting is completed, the gun head is pulled out, and the cross gap automatically closes to form a seal. Under the grouting pressure, the gap is opened, and the grout flows out smoothly. The functions of stopping grouting and grouting are integrated, which improves the problem of grout leakage. Attached image description: Figure 1 This is a front view of a grouting stop valve; Figure 2 This is a cross-sectional view of the top of a grouting stop valve; Figure 3 This is a vertical cross-sectional view of a grouting stop valve; Figure 4 This is a cross-sectional view of the tail end of a grouting stop valve.

[0024] Figure label: 1. Top; 11. Seam; 2. Middle; 21. Spiral pattern; 3. Tail; 31. Insertion port; 32. Groove; 4. Receiving cavity. Detailed Implementation

[0025] like Figure 1 and Figure 2 As shown, a grouting stop valve is a one-piece injection-molded rotary body made of elastic material. In this embodiment, the elastic material is rubber, and the interior is hollow with a receiving cavity 4.

[0026] The grouting stop valve includes a top section 1, a middle section 2, and a tail section 3, which are coaxially arranged.

[0027] The end face of the top 1 protrudes in the direction away from the middle, and the protruding part of the top 1 is a rotating parabolic object; The top of the protrusion 1 is provided with a through-slit 11. In this embodiment, the through-slit 11 is cross-shaped, and the axis of the grouting stop valve passes through the intersection of the cross of the through-slit 11. The cross through-slit 11 is normally closed and opens under pressure.

[0028] The middle part 2 is seamlessly connected to the top part 1. The middle part 2 is cylindrical, and the outer surface near the top part 1 is provided with a textured structure that protrudes relative to the outer surface of the top part 1. In this embodiment, the textured structure is a single spiral pattern 21, and the maximum outer diameter of the middle part 1 is greater than the maximum outer diameter of the top part 1.

[0029] The tail section 3 is seamlessly connected to the middle section 2, and the tail section 3 is a frustum-shaped sleeve. The diameter of the tail section 3 gradually increases from the end connected to the middle section 2 to the other end.

[0030] like Figure 1 , Figure 3 and Figure 4As shown in the figure, the tail portion 3 is hollowed inside to form an insertion opening 31 for inserting a grouting gun; a groove 32 is provided on the inner surface of the tail portion 3. In this embodiment, the groove 32 is an annular groove 32 that rotates one revolution along the rotation axis of the grouting and stop-grouting valve, the cross-section of the groove 32 in this embodiment is L-shaped, one end of the groove 32 faces the accommodating cavity 4, and the other end of the groove 32 faces away from the middle portion 2.

[0031] The working process of the utility model is as follows: during grouting, the grouting and stop-grouting valve is stuffed into the grouting hole. Due to the helical threads 21 on the middle portion 2, the grouting and stop-grouting valve is in close contact with the grouting hole, generating a large static friction force. After the grouting gun is inserted into the grouting and stop-grouting valve from the insertion opening 31 of the tail portion 3, grouting is performed, the slurry enters the accommodating cavity 4, pressure is generated in the accommodating cavity 4, so that the slits 11 on the top portion 1 are opened, and the slurry flows into the area to be grouted through the opened opening of the slits 11. After grouting is completed and the slurry is solidified, an inverted U-shaped hook is inserted into the groove 32 located on the tail portion 3 to take out the grouting and stop-grouting valve.

[0032] This specific embodiment is only an explanation of the utility model, and it is not a limitation to the utility model. Those skilled in the art can make modifications without creative contribution to this embodiment as needed after reading this specification, but as long as they are within the protection scope claimed by the utility model, they are protected by the patent law.

Claims

1. A grout injection stop valve, characterized by It is a rotating body structure made of elastic material, including a top (1), a middle (2) and a tail (3) arranged coaxially in sequence. The grout stop valve has a hollow cavity (4) inside. The top (1) has an end face that protrudes away from the center, and a through slit (11) is provided at the apex of the end face; after the through slit (11) is deformed and opened, it connects to the outside world and the accommodating cavity (4). The tail (3) has an insertion port (31) at the end opposite to the top, which communicates with the accommodating cavity (4) and is used for inserting the grouting gun.

2. The grouting stop valve according to claim 1, wherein the end face of the top (1) is an elliptical parabola.

3. The grouting stop valve according to claim 1, wherein the through-slit (11) is cross-shaped.

4. A grouting stop valve according to claim 1, characterized in that, The outer layer of the middle part (2) is provided with an uneven textured structure.

5. A grouting stop valve according to claim 4, characterized in that, The raised portion of the texture structure is higher than the highest point of the top (1).

6. A grouting stop valve according to claim 4, characterized in that, The texture structure is a spiral pattern (21).

7. A grouting stop valve according to claim 1, characterized in that, The inner surface of the tail (3) is provided with a groove (32).

8. A grouting stop valve according to claim 7, characterized in that, The groove (32) is an annular groove (32) that surrounds the inner surface of the tail (3).

9. A grouting stop valve according to claim 7, characterized in that, The groove (32) has an L-shaped cross-section.

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