Double-check-valve grouting needle head for building leak repairing

Abstract

The utility model provides a double-check-valve grouting needle head for building leak repairing, and relates to the field of building waterproof and leak-stopping auxiliary workpieces matched with a high-pressure grouting machine for use, the double-check-valve grouting needle head comprises a vertically-through needle cylinder, a vertically-through screw rod is screwed at the lower end of the needle cylinder, and a rubber ring and a gasket which are clamped between the screw rod and the lower end of the needle cylinder are sleeved outside the screw rod. A first vertically-through through hole is formed in the screw rod, and the inner diameter of the first through hole is gradually increased from top to bottom. A front non-return piece is arranged in the first through hole, a barb which protrudes inwards and is used for blocking the front non-return piece is arranged at the lower end of the first through hole, a second vertically-through through hole is formed in the needle cylinder, a rear non-return piece is arranged in the second through hole, and a blocking piece is arranged in the second through hole. According to the double-check-valve grouting needle head for building leak repairing, the front check piece is arranged in the first through hole of the screw rod, meanwhile, the rear check piece is arranged in the second through hole of the needle cylinder, dual protection is achieved, grout is prevented from flowing back and falling off from the needle cylinder, and environmental pollution or safety problems are avoided, and therefore the grouting needle head is environmentally friendly, safe and worthy of market popularization.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary workpieces for waterproofing and plugging leaks in buildings used in conjunction with a high-pressure grouting machine, in particular to a grouting needle head for building leak plugging with a double-check valve. Background Art

[0002] In the construction industry, there will be leakage of walls or other building surfaces, such as leakage in subways, tunnels, and sewers. Leakage leads to water seepage, which can easily damage the building surface in the long run, causing collapse and seriously affecting safety issues. Therefore, grouting needles are used together with high-pressure grouting machines to inject chemical liquid into the cracks, and the chemical liquid fills the cracks to form a waterproof effect. There are many such products on the market, but most of them have the problem of difficult assembly. The spring and rubber ball need to be installed into the metal syringe, and then the screw at the tail is screwed in, etc. This requires a strict assembly procedure to ensure that the assembly will not go wrong.

[0003] Patent 201922454886.8 discloses a grouting needle for building leak repair, including a syringe that passes through from top to bottom, a screw that passes through from top to bottom is screwed on the lower end of the syringe, the screw outer sleeve is provided with a rubber ring and a gasket stuck between the screw and the lower end of the syringe, the screw has a through hole that passes through from top to bottom, the inner diameter of the through hole gradually increases from top to bottom, rubber particles and a tower spring that presses against the lower end of the rubber particles are inserted into the through hole, and the lower end of the through hole has an inward convex barb that is used to block the lower end of the tower spring.

[0004] The above-mentioned grouting needle for building leak repair has the following problems in the actual construction process: after the grouting needle is inserted into the ceiling to be repaired, due to the rubber particles set in the screw, there will be residual slurry in the syringe, and the refluxed slurry will drip from the through hole at the top of the syringe, which is easy to pollute the environment. More importantly, the construction workers are in a high-altitude repair work and are in an upward-looking state. If the slurry accidentally flows into the glasses, it will damage the eyesight and even cause the construction workers to fall from a height. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a grouting needle for building leak repair with a double check valve, which solves the problems raised in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] To achieve the above purpose, the utility model is implemented through the following technical scheme: a double check valve grouting needle for building leak repair, including a syringe that passes through from top to bottom, a screw that passes through from top to bottom is screwed on the lower end of the syringe, a rubber ring and a gasket are clamped between the screw and the lower end of the syringe, and a through hole one that passes through from top to bottom is provided in the screw, and the inner diameter of the through hole one gradually increases from top to bottom, and it is characterized in that a front check piece is provided in the through hole one, the lower end of the through hole one has an inner convexity and a barb for blocking the front check piece, the syringe has a through hole two that passes through from top to bottom, a rear check piece is provided in the through hole two, and a blocking piece for blocking the rear check piece is provided in the through hole two.

[0009] Preferably, the front check member is a spherical bead, and the spherical bead is accommodated in through hole one.

[0010] Preferably, the rear check member is a spherical bead.

[0011] Preferably, the spherical beads are made of plastic.

[0012] Preferably, the spherical beads are made of rubber.

[0013] Preferably, the number of the rubber rings and gaskets is at least two, the rubber rings and gaskets are distributed at intervals, and a gasket is arranged between the rubber ring and the syringe.

[0014] Preferably, the gasket is an anti-slip gasket.

[0015] Preferably, the outer circumference of the stopper is engaged with the interior of the syringe, and openings are provided between the stoppers.

[0016] (III) Beneficial effects

[0017] The utility model provides a grouting needle for double check valve building leak repair. It has the following beneficial effects:

[0018] The double-check valve grouting needle for building leak repair has a front check piece in the through hole one of the screw and a rear check piece in the through hole two of the syringe, thereby providing double protection to prevent slurry from flowing back from the syringe and falling, causing environmental pollution or safety problems. Therefore, the grouting needle is green and safe and worthy of market promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a grouting needle for building leak repair with double check valves of the utility model;

[0020] Figure 2 This is a cross-sectional view of a grouting needle for building leak repair with a double check valve according to the utility model;

[0021] Figure 3 It is an enlarged view of point A (schematic diagram of barb structure);

[0022] Figure 4 The utility model is an exploded schematic diagram of a grouting needle for building leak repair with a double check valve.

[0023] In the figure: 1. syringe; 2. screw; 3. rubber ring; 4. gasket; 5. through hole 1; 6. front check piece; 7. barb; 8. through hole 2; 9. rear check piece; 10. stopper; 11. slurry inlet; 12. slurry outlet. DETAILED DESCRIPTION

[0024] The utility model embodiment provides a double check valve building leak repair grouting needle, such as Figure 1-4 As shown, it comprises a syringe 1 which is passed through from top to bottom, a screw 2 which is passed through from top to bottom is screwed on the lower end of the syringe 1, a rubber ring 3 and a gasket 4 which are stuck between the screw 2 and the lower end of the syringe 1 are covered on the outer cover of the screw 2, a through hole 1 5 which is passed through from top to bottom is provided in the screw 2, and the inner diameter of the through hole 1 5 gradually increases from top to bottom, and it is characterized in that: a front check piece 6 is provided in the through hole 1 5, and a barb 7 which is convex at the lower end of the through hole 1 5 and used to block the front check piece 6, a through hole 2 8 which is passed through from top to bottom is provided in the syringe 1, a rear check piece 9 is provided in the through hole 2 8, and a stopper 10 which is used to block the rear check piece 9 is provided in the through hole 2 8. The front and rear check pieces 9 are intended to make the slurry enter from the slurry inlet 11 of the needle head and flow out from the slurry outlet 12 in a one-way flow.

[0025] In the above technical solution, the technical features of the double check valve are given, and double protection is provided to prevent the slurry from flowing back and falling from the syringe 1, thereby improving the anti-leakage effect of the needle. The installation is also relatively simple and convenient, and is worthy of market promotion.

[0026] like Figure 2 and 4 As shown in the first embodiment, the front stopper 6 is a spherical bead, which is accommodated in the through hole 5. Figure 1 and 3 The barb 7 shown prevents the front check piece 6 from flowing out of the slurry outlet 12. Correspondingly, the rear check piece 9 is also a spherical bead, which is placed in the through hole 8, and a blocking member 10 is placed in the through hole 8. The blocking member 10 is used to prevent the rear check piece 9 from flowing into the through hole 8 of the syringe 1.

[0027] In the second embodiment (not shown in the figure), the front check member 6 can be a trapezoidal frustum, and its outer circumferential surface is matched with the through hole 1 5, which can also achieve the effect of unidirectional flow.

[0028] In the above-mentioned implementation one or two, a tower spring can be set in the through hole one 5, and set at the front end of the spherical bead to increase the return effect of the front check member 6. Similarly, a spring can also be added in the through hole two 8 to increase the return effect of the rear check member 9.

[0029] In terms of material selection, in the above-mentioned embodiment 1 or 2, the front and rear check members 9 can be made of plastic material or rubber material.

[0030] Further, such as Figure 1 As shown, the number of rubber rings 3 and gaskets 4 is at least two, the rubber rings 3 and gaskets 4 are distributed at intervals, a gasket 4 is arranged between the rubber ring 3 and the syringe 1, and the rubber ring 3 and gasket 4 play a sealing role.

[0031] The gasket 4 is preferably an anti-skid gasket 4 , and an anti-skid protrusion can be provided on the inner side of the cap of the screw 2 , both to effectively prevent circumferential sliding between the rubber ring 3 and the gasket 4 , and between the rubber ring 3 and the screw 2 .

[0032] Further, specific, such as Figure 4 As shown, the outer circumference of the stopper 10 is engaged with the inside of the syringe 1, and openings are provided between the stoppers 10, which can prevent the rear check member 9 from falling out without hindering the slurry from flowing forward.

[0033] Working principle:

[0034] During assembly, first rotate the rear check piece 9 into the syringe 1, then install the stopper 10, then put the rubber ring 3 and the gasket 4 on the outer sleeve of the screw 2, then screw the upper end of the screw 2 with the syringe 1, and then insert the front check piece 6 from the lower end of the screw 2 in sequence, set the barb 7, and the assembly is completed and enter the application scene;

[0035] When in use, when the double check valve building leak repair grouting needle is used, the rear end of the syringe 1 is connected to the high-pressure grouting machine. When grouting is performed in the syringe 1, the slurry respectively flushes the rear check piece 9 and the front check piece 6, opens the second through hole 8 and the first through hole 5, and the slurry flows in from the slurry inlet 11 and flows out from the slurry outlet 12. After the grouting is completed, the slurry flows back under the action of gravity, driving the front check piece 6 to reset and block the first through hole 5, and at the same time driving the rear check piece 9 to return to block the second through hole 8, thereby preventing the slurry in the syringe 1 from dripping, polluting the environment or falling into people's eyes.

[0036] In summary, the double check valve grouting needle for building leak repair has a front check piece 6 arranged in the through hole 1 5 of the screw 2, and a rear check piece 9 arranged in the through hole 2 8 of the syringe 1, thereby providing double protection to prevent the slurry from flowing back from the syringe 1 and falling, causing environmental pollution or safety problems. Therefore, the grouting needle is green and safe, and is worthy of market promotion.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grouting needle for double check valve building leak repair, comprising a needle barrel (1) that passes through from top to bottom, a screw rod (2) that passes through from top to bottom is screwed on the lower end of the needle barrel (1), a rubber ring (3) and a gasket (4) that are clamped between the screw rod (2) and the lower end of the needle barrel (1) are covered on the outer sleeve of the screw rod (2), and a through hole (5) that passes through from top to bottom is provided in the screw rod (2), and the inner diameter of the through hole (5) gradually increases from top to bottom, characterized in that: The through hole one (5) is provided with a front check piece (6), the lower end of the through hole one (5) has a barb (7) which is convex inwardly and used to block the front check piece (6), the syringe (1) has a through hole two (8) which passes through from top to bottom, the through hole two (8) is provided with a rear check piece (9), and the through hole two (8) has a blocking piece (10) which is used to block the rear check piece (9).

2. A grouting needle for double check valve building leak repair according to claim 1, characterized in that: The front check piece (6) is a spherical bead, and the spherical bead is accommodated in the through hole (5).

3. A grouting needle for double check valve building leak repair according to claim 1, characterized in that: The rear check piece (9) is a spherical bead.

4. A grouting needle for building leak repair with double check valve according to any one of claims 2-3, characterized in that: The spherical beads are made of plastic material.

5. A grouting needle for building leak repair with double check valve according to any one of claims 2-3, characterized in that: The spherical beads are made of rubber material.

6. A grouting needle for double check valve building leak repair according to claim 1, characterized in that: The number of the rubber ring (3) and the gasket (4) is at least two, the rubber ring and the gasket are distributed at intervals, and a gasket is arranged between the rubber ring and the syringe.

7. The grouting needle for double check valve building leak repair according to claim 1, characterized in that: The gasket (4) is an anti-slip gasket.

8. The grouting needle for double check valve building leak repair according to claim 1, characterized in that: The outer circumference of the stopper (10) is engaged with the inside of the syringe (1), and openings are provided between the stoppers (10).

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