JP2000192669A - High pressure fluid injecting apparatus and impregnant discharging member for use in the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high pressure fluid injecting apparatus and an impregnant injecting member for use in the same, which are strong in strength and can be manufactured on a large scale and at low cost by using a general purpose machine without using a special manufacturing machine, etc. SOLUTION: This high pressure fluid injecting apparatus is made up of a high pressure fluid injecting nipple 12, an impregnant discharging member, and a packing member 16. The injecting nipple 12 is obtained by integrally forming a nipple head potion 12a at which a nonreturn mechanism for preventing back flow of an impregnant is formed, and a nipple main body 12b at which a rotating means engaging portion and a notch are formed. The impregnant discharging member has a pipe member and a discharging portion at which a check valve for preventing back flow of the impregnant is arranged. The packing member 16 is cylindrical in shape and formed of an elastic material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure fluid injection device for injecting a high-pressure fluid into a hole formed in a wall portion, and an injectant discharge member used in the high-pressure fluid injection device.

[0002]

2. Description of the Related Art Fire resistance is applied to concrete structures and structures.
Although durability is required, the deterioration may gradually occur and cracks may occur due to changes in the external environment over time, for example, various causes such as a difference in temperature and temperature and wind and rain. When a crack that has occurred can be dealt with only by repair, an operation of injecting a synthetic resin, cement paste, or the like into the crack is performed. As a synthetic resin used for such work,
For example, there are low-viscosity epoxy, polyurethane, acrylic amide and the like, and examples of the cement paste include inorganic polymer cement paste and organic polymer cement.

As shown in FIG. 6, a conventional high-pressure fluid injection plug 20 used for injecting such a synthetic resin or cement paste into a crack generally includes a nipple member 22, a male screw member 24, It is composed of a cylindrical rubber packing member 26 and a washer 28 with a detachment prevention mechanism.

The nipple member 22 has a nipple head 22a having an outer shape capable of being connected in a liquid-tight manner to an injection coupling of a device for injecting a high-pressure fluid, and a hexagon nut portion 22b engaged with a rotating means such as a wrench or a spanner. Is formed integrally with the nipple body 22c having A center hole 22d penetrating in the longitudinal direction is formed at the center thereof, and the end of the center hole 22d on the nipple body side (left end in the figure)
, A female screw 22e is formed over a predetermined length.

The male screw member 24 is formed integrally with a large-diameter base portion 24a and a stem portion 24c having a male screw 24b screwed into the female screw 22e of the nipple member 22 on the outer peripheral surface. A central hole 24d penetrating in the longitudinal direction communicating with the central hole 22d of the nipple member 22 is formed at the center thereof. Base 24a of center hole 24d
An annular seat 24e is provided at a predetermined position on the side, and a coil spring 24g that presses a ball 24f against the annular seat 24e to prevent backflow of fluid is mounted.

[0006] Rubber packing member 26 and washer 28
Is mounted around the stem 24c of the male screw member 24. Although not shown, the washer 28 is provided with a plurality of slip-off preventing claws that move the rubber packing member 26 in the direction of compressing (left side in the figure) but do not move it in the direction in which the washer 28 comes out. The above-described action is performed by engaging the slip-off preventing claw with the male screw 24b of the stem portion 24c from four rounds.

Using a conventional high pressure fluid injection plug 20,
For example, a method of repairing a crack generated in a wall of an apartment will be described (see FIG. 6).

First, a hole 3 having a direct line slightly larger than the outer diameter of the high-pressure fluid injection plug 20 is formed in the wall 34 of the apartment.
Punch 6. The hole 36 is formed by a crack 34 generated in the wall 34.
It is necessary to be continuous with a. The high-pressure fluid injection plug 20 is inserted into the hole 36 such that the hexagon nut portion 22b is exposed outside the wall 34. Next, the hexagon nut portion 22b is rotated using a rotating means such as a spanner or a hexagon wrench. Thereby, the female screw 2 of the nipple member 22
2e enters so as to be screwed deeply with the male screw 24b of the male screw member 24. End face of nipple member 22 and male screw member 2
Since the distance between the rubber packing member 26 and the base 24a becomes small, the rubber packing member 26 is pressed and shrunk in the longitudinal direction and expands in the circumferential direction to be tightly fixed to the hole 36 in the wall 34. Thereafter, the injection coupling of the device used for injecting the fluid is connected to the nipple head 22a of the high-pressure fluid injection plug 20.
And inject synthetic resin or cement paste.

After the injection is completed, the nipple member 22 is removed from the high-pressure fluid injection plug 20 by rotating the hexagon nut portion 22b of the nipple member 22 in the reverse direction by a rotating means such as a spanner, and the joint material 38 is inserted into the hole 36. To complete the operation.

[0010] Such a conventional high-pressure fluid injection plug 20
Is used for a crack having a surface crack width of 0.25 mm, and the length of penetration of a synthetic resin or the like is measured. The measured value is 25 cm to 30 cm when the injection pressure is 3 kg / cm ^2.
Was the permeation length. Therefore, when the length of the crack 34a is expected to exceed 30 cm, the injection pressure is increased to inject a synthetic resin, a cement paste, or the like.

Further, it has been confirmed that a synthetic resin, cement paste, or the like hardly penetrates into cracks not connected to the outer surface intersecting cracks directly entering from the surface. Therefore, when a synthetic resin, cement paste, or the like is injected into a crack that is not connected to the outer surface, which is a branch line, the injection is performed at a pressure exceeding 30 kg / cm ² .

However, when the synthetic resin or the cement paste is injected with a high pressure, the nail for preventing the washer 28 from coming off comes off the male screw 24b of the male screw member 24 due to the pressure. As a result, the injection material leaked out together with the rubber packing member 26 and the washer 28, and in an extreme case, was sprayed out. When such an injectant enters the eyes, it reacts with water in the eyeballs and may damage the eyeballs, and thus has a problem in terms of ensuring the safety of workers.

However, the method of removing the nipple member 22 from the high-pressure fluid injection plug 20 after the synthetic resin or the cement paste has completely hardened is a work method in which the work must be carried out by scaffolding. I couldn't take it for a point. In addition, the trouble of rotating the nipple member 22 a predetermined number of times does not become stupid if the number is large. In some cases, the plug could not be removed from the injection plug 20.

[0014] Therefore, the applicant can safely and quickly remove the protruding portion from the hole without injecting the high-pressure fluid injection plug from the hole even if the injectant is injected at a high pressure as shown in FIG. And invented a high-pressure fluid injection plug capable of beating and squeezing and filling a joint material (Japanese Patent Application No. 9-2).
25550)

[0015]

However, although the conventional problems such as leakage of the injectant such as synthetic resin and cement paste and spray-like blowing have been solved,
The male screw member 44 has a bolt-like shape in which a large-diameter check valve portion 44c having a check valve formed therein and a stem portion 44a having a male screw 44b formed on the outer peripheral surface are integrally formed. For this reason, there is a problem that processing for disposing the check valve and processing for elongating the center hole 44d penetrating in the longitudinal direction of the male screw member 44 are very troublesome and costly. The male screw member 44 is connected to the nipple member 42.
The male screw 44b sometimes rarely breaks when it enters inside and the packing member 46 expands in the circumferential direction.

Accordingly, the present invention provides a high-pressure fluid injection device and a high-pressure fluid injection device which can increase the strength of a screw portion and can be manufactured in large quantities at low cost with a general-purpose machine without using a special manufacturing machine or the like. An object of the present invention is to provide an injecting agent discharge member used for an injecting device.

[0017]

According to one aspect of the present invention, there is provided a high-pressure fluid injection device for injecting a high-pressure fluid into a hole formed in a wall. A nipple head having an outer shape that can be closely connected to an injection coupling of a device for injecting a high-pressure fluid, and a rotating means engaging portion for engaging a rotating means such as a spanner on an outer peripheral surface, and a hammer or the like. A notch portion that can be beaten and broken by the hitting means is formed, and a female screw portion is threaded over a predetermined length on an inner peripheral surface of a central hole formed in the longitudinal direction and penetrating therethrough. A high-pressure fluid injection nipple integrally formed with a nipple body; a male screw part screwed into a female screw part provided in a center hole of the nipple body is threaded on the outer peripheral surface and the inside is longitudinally extended. A penetrating through hole was drilled An injecting agent discharging member having an i.p. portion and a discharging portion for discharging the infusing agent provided at an end of the pipe portion and having a check valve for preventing backflow of the injecting agent; A cylindrical packing member formed of an elastic body and attached to a pipe portion of the agent discharge member. The packing member is radially expanded by screwing the pipe portion into a center hole of the nipple body. It is thereby characterized in that it is tightly fixed to a hole formed in the wall.

According to a second aspect of the present invention, there is provided an injectable discharge member used in the high-pressure fluid injection device according to the first aspect, wherein the discharge portion and the pipe portion are formed as separate members. The injection agent discharge section is characterized in that the injection section is connected to one end side of the pipe section by connecting the discharge section.

According to a third aspect of the present invention, there is provided an injectable discharge member used in a high-pressure fluid injection device for injecting a high-pressure fluid into a hole formed in a wall. A male screw portion, which is screwed to a female screw portion provided in a center hole of the nipple body according to claim 1, is threaded on the outer peripheral surface, and a through hole penetrating the inside in the longitudinal direction is formed. A pipe member, and a discharge member that discharges the injecting agent, which is provided at an end of the pipe portion and has a check valve for preventing backflow of the injecting agent. The discharge part is connected to one end side.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A high-pressure fluid injection device according to the present invention and an injectant discharging member used in the high-pressure fluid injection device will be described with reference to the drawings. FIG. 1 is an exploded perspective view of one embodiment of a high-pressure fluid injection device according to the present invention, and FIG.
2 (b) is a side view of the embodiment shown in FIG.

First, the high-pressure fluid injection device 10 according to the present invention
Is generally configured to include a high-pressure fluid injection nipple 12, an injection agent discharge member 15, and a cylindrical packing member 16.

The high-pressure fluid injection nipple 12 is integrally formed with a nipple head 12a and a nipple body 12b having a rotating means engaging portion for engaging with rotating means such as a spanner. Since it is formed integrally, there is no space or space between the nipple head 12a and the nipple body 12b where the infused fluid leaks. The high-pressure fluid injection nipple 12 can be made of steel or brass, similarly to the conventional grease injection nipple, and can be easily manufactured using the manufacturing technology. Nipple head 1
The outer shape of 2a is adapted to be liquid-tightly connected to a device for injecting a high-pressure fluid, for example, an injection coupling or a chuck type nozzle of a high-pressure pump. For example, the outer shape of the nipple head 12a in the embodiment shown in FIG. 1 has a conventionally well-known shape, but is not limited thereto.
For example, it may be a cylindrical type or the like.

In the illustrated preferred embodiment, the entire nipple body 12b is comprised of a long nut having a hexagonal cross section. Regardless of which part of the nipple body 12b is engaged with a rotating means such as a wrench, the high-pressure fluid injection nipple 12 can be rotated, and the operation becomes easy. Of course, the hexagonal nut portion may be formed only on the portion adjacent to the nipple head 12a, even if the whole does not have a hexagonal cross section. Note that the outer shape of the nipple body 12b changes depending on what is selected as the rotating means.
For example, the outer shape of the nipple body 12b is a quadrangle for a square spanner, and the outer shape of the rotary jig having a pair of projections has a pair of holes fitted to it.

A notch 12c is formed on the outer peripheral surface of the nipple main body 12b so that the nipple main body 12b can be bent by a hitting means such as a hammer. Notch 12c
Makes a round around the outer peripheral surface of the nipple main body 12b of the high-pressure fluid injection nipple 12, and its cross-sectional shape is determined by hitting means H such as a hammer at the position of the notch 12c.
b is formed in a shape that can be knocked and folded, for example, a U shape, a V shape, or a trapezoidal shape. Since the notch 12c extends around the outer peripheral surface of the nipple main body 12b, the high-pressure fluid injection nipple 12 on the nipple head 12a side is broken by the notch 12c, even if the high-pressure fluid injection nipple 12 is hit from any direction. be able to.

As best shown in FIG. 4, the internal thread 1 cut into the center hole 12d of the high pressure fluid injection nipple 12
The position of the innermost part of 2e is set to be closer to the end face of the nipple body 12b than the position where the notch 12c is formed. Female screw 1 in center hole 12d of nipple body 12b
A pipe member 14a, in which the male screw 14b of the injectable discharge member 14 is cut, is screwed into 2e, but the depth of the pipe member 14a is shorter than the position where the notch 12c is formed. Thereby, when the high-pressure fluid injection nipple 12 is beaten by the hitting means H, the high-pressure fluid injection nipple 12 closer to the nipple head 12a than the notch 12c does not enter the pipe member 14a of the injectant discharge member 14, so that it is simple and easy. Can be separated and removed without fail.

The total length of the high-pressure fluid injection nipple 12 is not particularly limited, but is preferably about 2.5 cm to 20 cm in consideration of a drill hole formed in a concrete wall.

The injection agent discharge member 14 used in the high-pressure fluid injection device according to the present invention comprises a pipe member 14a
4e. Pipe member 14a
Has a through hole 14c penetrating therethrough in the longitudinal direction. A central hole 12d of the nipple body 12b of the high-pressure fluid injection nipple 12 is provided on the outer peripheral surface of the pipe member 14a.
Male screw 14 which is screwed into the female screw 12e provided in
b is threaded. The pipe member 14a is connected to and fixed to one end of the discharge portion 14e. The injectant discharge member 14 corresponds to the male screw member 44 in which the stem portion 44a and the check valve portion 44c shown in FIG. 5 are integrally formed as one member.

The discharge portion 14e is provided with a concave portion 14f for receiving the pipe member 14a.
f is communicated. A female screw 14p that is screwed with a male screw 14b provided on the outer peripheral surface of the pipe member 14a is cut on the inner wall of the concave portion 14f. Accordingly, the two members are connected by screwing the pipe member 14a into the recess 14f of the discharge portion 14e. of course,
The method of connecting the pipe member 14a and the discharge portion 14e is not limited to this. For example, engaging portions are provided in the vicinity of the end of the pipe member 14a connected to the concave portion 14f and the concave portion 14f, respectively. A method may be used in which the two members are fixed when they are fitted into the recesses 14f.

A check valve 14g for preventing backflow of the injectant is provided inside the discharge portion 14e, and the check valve 14g includes a ball 14h and a compression spring 14j. The ball 14h is housed inside the discharge portion 14e, and has a shape in which a part of the inner surface of the discharge portion 14e protrudes inward so that the ball 14h does not fall off to the concave portion 14f side. The discharge portion 14e has a shape in which the distal end on the discharge port 14k side is bent inward, and locks one end of the compression spring 14j at this portion to press the ball 14h with a predetermined force. The check valve is not limited to this, but may be constituted by a leaf valve and a ball, or may be constituted by another method.

The packing member 16 has a cylindrical shape having a hole at the center for inserting the pipe member 14a of the injectant discharging member 14, and is formed of, for example, natural rubber, synthetic rubber, synthetic resin, or the like. Have been. A washer 19a and a washer 19b with internal teeth are inserted into both ends of the packing member 16. The high-pressure fluid injection device 10 is formed by assembling the above-described members.

Next, a method of using the high-pressure fluid injection device according to the present invention will be described with reference to FIG. Repair object,
For example, a hole 36 having a diameter slightly larger than the outer diameter of the high-pressure fluid injection device 10 is formed in the wall 34 of the building. This hole 3
6 needs to be generated on the wall 34 and be continuous with the crack 34a. In this hole 36, the high-pressure fluid injection device 10
Is inserted (see FIG. 4A), and the high-pressure fluid injection nipple 12 is rotated in the direction of arrow X by rotating means such as a spanner. The packing member 16 attached to the pipe member 14a of the injectant discharge member 14 is connected to the discharge portion 14e and the nipple body 12a.
It is compressed and shrunk in the longitudinal direction between the end face b and the radial direction, and is tightly fixed to the hole 36. Thereafter, an injection coupling (not shown) of a device used for injecting a fluid is attached to the nipple head 12a, and an injection agent such as a synthetic resin or a cement paste is injected (FIG. 4).
(B)).

Immediately after the injection of the injection agent, the portion of the high-pressure fluid injection nipple 12 projecting from the hole 36 is hit by a hitting means H such as a hammer (see FIG. 4C). Thereby, the nipple head 12a side is separated from the high-pressure fluid injection device 10 from the notch 12c and comes off. On the other hand, the internal thread 12e side of the notch 12c of the nipple body 12b is
Is left in the high-pressure fluid injection device 10 while being screwed. Therefore, since the cylindrical packing member 16 is kept compressed in the longitudinal direction, it is kept tightly fixed in the hole 36 (see FIG. 4D). Therefore, high pressures, for example, 30
Even when injecting a synthetic resin or cement paste at a pressure exceeding kg / cm ² , the high-pressure fluid injection device 10
6 does not come off or loosen, and the accident that the injectate is sprayed out can be eliminated. Therefore, the injection agent can be injected at a considerably high pressure, and a synthetic resin or cement paste can be injected even into a crack that is not connected to the outer surface which is a branch line as shown in FIG.

After removing the portion of the high-pressure fluid injection nipple 12 protruding from the hole 36, the hole 36 is filled with a joint material 38 to complete the operation. In the field, the scaffold can be immediately moved to another position, as if the scaffold is assembled, thereby improving work efficiency. Although the high-pressure fluid injection device 10 of the present invention has been described as an example of repairing a crack in a concrete wall, it goes without saying that other devices can also be used.

[0034]

In the high-pressure fluid injection device according to the present invention, the injection agent discharge member used is composed of two members, a pipe member and a discharge portion, so that it can be supplied in large quantities and at low cost. became. That is, when the male screw member has a bolt-like shape formed integrally with a large-diameter check valve portion having a check valve formed therein and a stem portion having an external thread formed on the outer peripheral surface, However, according to the present invention, it can be used only by cutting a screw on the outer peripheral surface of a pipe which is already mass-produced and used as a general-purpose product. Therefore, there is an effect that it is possible to manufacture an injection discharge member used for a high-pressure fluid injection device in a large amount and at a low cost with a general-purpose machine without using a special dedicated machine.

Further, since the pipe member is a general-purpose product, it can be selected from various materials, so that the range of choice is widened, and the pipe member can be manufactured using a pipe manufactured from a material having high mechanical strength. Became. Therefore, there is an effect that breakage of the screw during use which occurs when the screw member has a bolt shape as in the related art can be avoided.

Further, since the discharge section is formed as a separate member, it is easy to provide a check valve. That is,
If the male screw member has a bolt-like shape in which a large-diameter check valve and stem are integrally formed, it takes time and effort to process the check valve, making mass production difficult and costly. However, according to the present invention, it is possible to manufacture the discharge section in a large amount and at a low cost with a general-purpose machine without using a special manufacturing machine or the like. There is an effect that a high-pressure fluid injection device that can be mass-produced at low cost can be provided.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an embodiment of a high-pressure fluid injection device according to the present invention.

FIG. 2A is an exploded sectional view of the embodiment shown in FIG. 1,
(B) is a side view thereof.

FIG. 3 is a longitudinal sectional view of one embodiment of an injection discharge member according to the present invention.

4 (a) to 4 (d) are longitudinal sectional views of respective steps in a method of using the high-pressure fluid injection device of FIG. 1;

FIG. 5 is a longitudinal sectional view of a conventional high-pressure fluid injection device.

6 (a) to 6 (c) are longitudinal sectional views of respective steps in a conventional method of using a high-pressure fluid injection plug.

[Explanation of symbols]

Reference Signs List 10 high-pressure fluid injection device 12 high-pressure fluid injection nipple 12a nipple head, 12b nipple body,
12c notch, 12d center hole, 12e
Female thread, 14 Injectant discharge member 14a Pipe member, 14b Male thread,
14c through hole, 14e discharge unit, 14f
Recess, 14 g check valve, 14 h ball, 14 j compression spring, 14 k discharge port, 16 packing member 19 a washer 19 b washer with internal teeth 34 wall 34 a crack 36 hole

Claims (3)

[Claims] A high-pressure fluid injection device for injecting a high-pressure fluid into a hole formed in a wall portion, the device having an outer shape capable of being closely connected to an injection coupling of a device for injecting a high-pressure fluid. A nipple head having a rotating means engaging portion for engaging with rotating means such as a wrench on the outer peripheral surface, and a notch portion which can be bent by a hitting means such as a hammer is formed, and A high-pressure fluid injection nipple integrally formed with a nipple body in which a female thread is threaded over a predetermined length on an inner peripheral surface of a provided central hole penetrating in the longitudinal direction; a central hole of the nipple body A male screw part screwed to a female screw part provided on the outer peripheral surface is threaded and a pipe part having a through hole penetrating the inside in the longitudinal direction, and an end of the pipe part Disposed to prevent backflow of infusate Discharge member having a discharge portion provided therein for discharging the filler, and a cylindrical packing formed of an elastic body and attached to the pipe portion of the filler discharge member. By screwing the pipe portion into the center hole of the nipple body, the packing member expands in the radial direction, and is thereby tightly fixed to the hole formed in the wall portion. A high-pressure fluid injection device, characterized in that: 2. The injectant discharge member used in the high-pressure fluid injection device according to claim 1, wherein the discharge portion and the pipe portion are formed as separate members, and the injectate discharge portion is connected to one end of the pipe portion. An injection discharge member for use in a high-pressure fluid injection device, characterized in that the discharge portion is connected to the portion side. 3. An injection discharging member used in a high-pressure fluid injection device for injecting a high-pressure fluid into a hole formed in a wall portion, wherein the injection member is provided in a center hole of the nipple body according to claim 1. A pipe member having a male screw portion screwed to the female screw portion formed on the outer peripheral surface and having a through hole penetrating therethrough in the longitudinal direction, and disposed at an end of the pipe portion. A check valve for preventing backflow of the filler is constituted by two members of a discharge member that discharges the filler provided inside, and that the discharge part is connected to one end side of the pipe member. An injection discharge member for use in a high-pressure fluid injection device.