CN213574114U

CN213574114U - Pressure-maintaining check valve for grouting pipe

Info

Publication number: CN213574114U
Application number: CN202022235821.7U
Authority: CN
Inventors: 廖志雄
Original assignee: Putian Jiantai Industry And Trade Co ltd
Current assignee: Putian Jiantai Industry And Trade Co ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-06-29
Anticipated expiration: 2030-10-09

Abstract

The utility model discloses a check valve technical field's a pressurize check valve for slip casting pipe, including the installation urceolus that link up from top to bottom, the inner chamber top of installation urceolus is provided with contrary piston, the bottom of installation urceolus is provided with the end cap, be provided with compression spring between contrary piston and the end cap, the outer wall of installation urceolus has been seted up out the oar hole, contrary piston does not keep out under the pressurized state in go out oar downthehole side, the utility model discloses under the unpressurized state, compression spring supports contrary piston shutoff play oar hole, plays contrary anti-reflux effect to both sides all inlay about contrary piston's the outer wall and are equipped with O type sealing washer, two O type sealing washers are located out both sides about the oar hole under contrary piston non-pressurized state, can further guarantee the pressure-bearing and the sealed effect of check valve.

Description

Pressure-maintaining check valve for grouting pipe

Technical Field

The utility model relates to a check valve technical field specifically is a pressurize check valve for slip casting pipe.

Background

With the further development and utilization of underground space, more and more ultra-deep foundation pits, long-distance and large-section shield tunnels or pipe-jacking tunnels appear, which provides new challenges for engineering construction. Among the existing multiple auxiliary construction technologies, the grouting technology plays an important role in the aspects of seepage prevention of an underground structure, foundation pit reinforcement, ground settlement prevention, foundation treatment of a built structure, friction reduction and jacking of a jacking pipe and the like. The grouting technology is that certain solidifiable grout is injected into cracks and gaps of various media through certain pressure so as to change the physical and mechanical properties of soil or rock mass, and after the grout is solidified, a whole body with good impermeability and higher strength is formed, so that the purposes of water plugging and reinforcement are achieved. The grouting pipe does not have a grout stopping function, a plug or cotton threads are adopted to seal a grout inlet hole after the grouting is finished, and the operation is difficult when upward grouting, high-pressure grouting or large water pressure is acted.

Based on this, the utility model designs a pressurize check valve for slip casting pipe to solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pressurize check valve for slip casting pipe to solve above-mentioned technical problem.

In order to realize the purpose, the utility model provides the following technical scheme: the utility model provides a pressurize check valve for slip casting pipe, includes the installation urceolus that link up from top to bottom, the inner chamber top of installation urceolus is provided with contrary piston, the bottom of installation urceolus is provided with the end cap, be provided with compression spring between contrary piston and the end cap, the outer wall of installation urceolus has seted up out the oar hole, contrary piston is supported under the non-pressurized state in go out the oar hole inboard.

Preferably, O-shaped sealing rings are embedded in the upper side and the lower side of the outer wall of the check piston, and the two O-shaped sealing rings are located on the upper side and the lower side of the propeller outlet hole in the non-pressed state of the check piston.

Preferably, the number of the paddle outlet holes is three, and the three paddle outlet holes are distributed in a circumferential array.

Preferably, the upper end of the outer wall of the mounting outer cylinder is provided with an outer cylinder external thread.

Preferably, the plug is of a step cylinder structure, and the small-diameter end of the plug is in threaded connection with the lower end of the mounting outer cylinder.

Preferably, the centers of the bottom parts of the plug and the check piston are both provided with inner hexagonal wrench holes.

Preferably, the upper end of the inner wall of the mounting outer cylinder is provided with a limiting step, and the top end of the check piston is abutted against the step surface of the limiting step in an uncompressed state.

Compared with the prior art, utility model's beneficial effect does:

the utility model discloses check valve for slip casting pipe is mainly including the installation urceolus, contrary piston, the end cap, compression spring and play oar hole, the compression spring butt sets up between contrary piston and end cap, under the non-pressurized state, compression spring supports contrary piston shutoff play oar hole that ends, play contrary anti-return effect, and both sides all inlay about the outer wall of contrary piston and are equipped with O type sealing washer, two O type sealing washers, both sides about being located play oar hole under the non-pressurized state of contrary piston, can further guarantee the pressure-bearing and the sealed effect of check valve.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive work.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal cross-sectional structure of the present invention;

FIG. 3 is a schematic structural view of the check piston and the O-shaped sealing ring of the present invention;

fig. 4 is the schematic view of the plug structure of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-installing an outer cylinder, 2-a non-return piston, 3-a plug, 4-a compression spring, 5-a propeller outlet hole, 6-an O-shaped sealing ring, 7-an outer cylinder thread and 8-an inner hexagonal wrench hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.

Referring to fig. 1-2, the utility model provides a technical solution: a pressure-maintaining check valve for a grouting pipe comprises an installation outer barrel 1 which is communicated up and down, outer barrel external threads 7 are arranged at the upper end of the outer wall of the installation outer barrel 1 and are used for being connected with an external grouting pipe pipeline, a check piston 2 is arranged above an inner cavity of the installation outer barrel 1, a limiting step is arranged at the upper end of the inner wall of the installation outer barrel 1, the top end of the check piston 2 is abutted to the step surface of the limiting step under the non-pressed state, a plug 3 is arranged at the bottom of the installation outer barrel 1, the plug 3 is of a step cylinder structure, the small-diameter end of the plug 3 is in threaded connection with the lower end of the installation outer barrel 1, inner hexagonal wrench holes 8 are formed in the centers of the bottoms of the check piston 2 and the plug 3, a hexagonal wrench is convenient to adjust the check piston 2 and screw the plug 3, a compression spring 4 is arranged between the check piston 2 and the plug 3, a propeller outlet hole 5 is formed in the, the number of the propeller outlet holes 5 is three, the three propeller outlet holes 5 are distributed in a circumferential array manner, so that uniform propeller outlet in the circumferential direction of concrete is facilitated, the O-shaped sealing rings 6 are embedded in the upper side and the lower side of the outer wall of the check piston 2, the two O-shaped sealing rings 6 are positioned on the upper side and the lower side of the propeller outlet holes 5 in the non-pressed state of the check piston 2, and are positioned on the upper side and the lower side of the propeller outlet holes 5 in the non-pressed state of the check piston 2, so that the pressure bearing and the sealing effect of the check valve can be; the pressure-bearing capacity of the check piston 2 is mainly determined by the compression spring 4, and the check valve has different pressure-bearing and pressure-maintaining capacities according to actual construction requirements, so that the pressure-bearing and pressure-maintaining capacities of the check valve can be adjusted between 1 MPa and 4MPa by replacing the compression spring 4 with different stiffness coefficients (length, diameter).

Working principle embodiment:

connecting an installation outer cylinder 1 of a check valve to the lower end of a grouting pipe through an outer cylinder external thread 7 on the top of the outer wall of the installation outer cylinder 1, attaching adhesive tapes to the outer side of a grout outlet 5 to prevent early-stage external silt from entering a cavity of the installation outer cylinder 1, binding and fixing the grouting pipe provided with the check valve and a reinforcement cage, placing the reinforcement cage in a pile hole of a cast-in-place pile, when grouting is performed, firstly introducing high-pressure water to the top end of the grouting pipe to flush the adhesive tapes, then switching to high-pressure grouting, allowing slurry to enter the installation outer cylinder 1 through the grouting pipe, using the impact pressure of the slurry to downwardly punch a check piston 2 against the elastic force of a compression spring 4 until the grout outlet 5 is exposed, so that the high-pressure slurry is output from the grout outlet 5, when the high-pressure grouting at the top end of the grouting pipe stops inputting, jacking the check piston 2 up due to the recovered elastic force of the compression spring 4 to seal the grout outlet 5, the underwater concrete hydrostatic pressure can be borne by 1-4MPa, so that the non-return effect is realized.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; the term "connected" may refer to a direct connection, an indirect connection through an intermediate, a connection between two elements or an interaction relationship between two elements, and unless otherwise specifically defined, the term should be understood as having a specific meaning in the present application by those skilled in the art.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a pressure maintaining check valve for slip casting pipe which characterized in that: including installation urceolus (1) that link up from top to bottom, the inner chamber top of installation urceolus (1) is provided with contrary piston (2), the bottom of installation urceolus (1) is provided with end cap (3), be provided with compression spring (4) between contrary piston (2) and end cap (3) of ending, oar hole (5) have been seted up out to the outer wall of installation urceolus (1), contrary piston (2) do not support under the pressurized state keep off in it is inboard to go out oar hole (5).

2. The pressure maintaining check valve for the grouting pipe as claimed in claim 1, wherein: both sides all inlay and are equipped with O type sealing washer (6) about the outer wall of contrary piston (2), two O type sealing washer (6) are in contrary piston (2) do not lie in under the pressurized state both sides about going out oar hole (5).

3. The pressure maintaining check valve for the grouting pipe as claimed in claim 1, wherein: the number of the propeller outlet holes (5) is three, and the propeller outlet holes (5) are distributed in a circumferential array shape.

4. The pressure maintaining check valve for the grouting pipe as claimed in claim 1, wherein: and an outer barrel external thread (7) is arranged at the upper end of the outer wall of the mounting outer barrel (1).

5. The pressure maintaining check valve for the grouting pipe as claimed in claim 1, wherein: the plug (3) is of a step cylinder structure, and the small-diameter end of the plug (3) is connected with the lower end of the installation outer cylinder (1) through threads.

6. The pressure maintaining check valve for the grouting pipe as claimed in claim 1, wherein: and the centers of the bottom parts of the plug (3) and the check piston (2) are provided with inner hexagonal wrench holes (8).

7. The pressure maintaining check valve for the grouting pipe as claimed in claim 1, wherein: the upper end of the inner wall of the installation outer cylinder (1) is provided with a limiting step, and the top end of the non-return piston (2) is abutted to the step surface of the limiting step in the non-pressed state.