JP4014747B2 - High pressure fluid injection device and injection agent discharge member used for high pressure fluid injection device - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a high-pressure fluid injection device for injecting a high-pressure fluid into a hole drilled in a wall portion, and an injecting agent discharge member used for the high-pressure fluid injection device.
[0002]
[Prior art]
Concrete buildings and structures are required to have fire resistance and durability, but they may gradually deteriorate and crack due to various causes such as changes in the external environment over time, such as differences in temperature and temperature, wind and rain, etc. . When the generated crack can be dealt with only by repair, an operation of injecting synthetic resin or cement paste into the crack is performed. Examples of the synthetic resin used for such work include low-viscosity epoxy, polyurethane, and acrylamide, and examples of the cement paste include inorganic polymer cement paste and organic polymer cement.
[0003]
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 is schematically shown as a nipple member 22, a male screw member 24, and a cylindrical shape. The rubber packing member 26 and a washer 28 with a prevention mechanism are provided.
[0004]
The nipple member 22 has a nipple head portion 22a having an external shape capable of being fluid-tightly connected to an injection coupling of a device for injecting a high-pressure fluid, and a nipple member having a hexagonal nut portion 22b that engages with a rotating means such as a wrench or spanner. The main body 22c is integrally formed. A central hole 22d penetrating in the longitudinal direction is formed at the center, and a female screw 22e is formed over a predetermined length from the end of the center hole 22d on the nipple body side (the left end in the figure).
[0005]
The male screw member 24 is integrally formed with a base portion 24a having a large diameter and a stem portion 24c having a male screw 24b screwed to the female screw 22e of the nipple member 22 on the outer peripheral surface. A central hole 24d penetrating in the longitudinal direction and communicating with the central hole 22d of the nipple member 22 is formed at the center. An annular seat 24e is provided at a predetermined position on the base portion 24a side of the center hole 24d, and a coil spring 24g that presses the ball 24f against the annular seat 24e to prevent backflow of fluid is mounted. .
[0006]
The rubber packing member 26 and the washer 28 are mounted around the stem portion 24 c of the male screw member 24. Although not shown, the washer 28 is provided with a plurality of removal prevention claws that move the rubber packing member 26 in the compression direction (left side in the figure) but do not move it in the direction in which the washer 28 comes out. The above-mentioned action is performed by engaging the pull-out preventing claw with the male screw 24b of the stem portion 24c from the four circumferences.
[0007]
A method of repairing, for example, a crack generated on the wall of an apartment using the conventional high-pressure fluid injection plug 20 will be described (see FIG. 6).
[0008]
First, a hole 36 having a straight line slightly larger than the outer diameter of the high-pressure fluid injection plug 20 is drilled in the apartment wall 34. This hole 36 must be continuous with a crack 34 a generated in the wall 34. The high pressure fluid injection plug 20 is inserted into the hole 36 so that the hexagon nut 22b is exposed to the outside of the wall 34. Next, the hexagon nut 22b is rotated using a rotating means such as a spanner or a hexagon wrench. Thereby, the female screw 22e of the nipple member 22 enters so as to be deeply engaged with the male screw 24b of the male screw member 24. Since the distance between the end face of the nipple member 22 and the base portion 24a of the male screw member 24 is small, the rubber packing member 26 is compressed in the longitudinal direction and expanded in the circumferential direction to be tightly fixed to the hole 36 in the wall 34. The Thereafter, an injection coupling of a device used for injecting fluid is attached to the nipple head portion 22a of the high-pressure fluid injection plug 20, and synthetic resin, cement paste, or the like is injected.
[0009]
After the injection is finished, the nipple member 22 is removed from the high-pressure fluid injection plug 20 by rotating the hexagonal nut 22b of the nipple member 22 in the reverse direction by a rotating means such as a spanner, and the hole 36 is filled with the joint material 38. To complete the work.
[0010]
25cm In such a case the actual measurement values Once the surface crack width conventional high-pressure fluid injection plug 20 is used in cracking of 0.25mm synthetic resin or the like to measure the length of penetration injection pressure is 3 kg / cm ² The penetration length was ~ 30 cm. Therefore, when the length of the crack 34a is expected to exceed 30 cm, the injection pressure is increased to inject synthetic resin, cement paste, or the like.
[0011]
In addition, it has been confirmed that synthetic resin, cement paste, and the like do not easily penetrate into cracks that are not connected to the outer surface intersecting with cracks that have entered directly 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 as such a branch line, it is injected at a pressure exceeding 30 kg / cm ² .
[0012]
However, when a synthetic resin, cement paste, or the like is injected at a high pressure, an accident has occurred in which the claw for preventing the washer 28 from coming off from the male screw 24 b of the male screw member 24 is lost due to the pressure. As a result, the injecting agent leaked together with the rubber packing member 26 and the washer 28, and in an extreme case, it was blown out in a spray form. When such an injection enters the eye, it reacts with water in the eyeball and may cause damage to the eyeball, causing a problem in terms of ensuring the safety of workers.
[0013]
However, the method of removing the nipple member 22 from the high-pressure fluid injection plug 20 after the synthetic resin or cement paste is completely cured is adopted from the viewpoint of work efficiency in the field where work must be performed with a scaffold. could not. In addition, when the number of times for rotating the nipple member 22 a predetermined number of times is large, the nipple member 22 does not become stupid, and the injection agent adheres to the inner surface of the center hole 22d of the high-pressure fluid injection plug 20 so that the nipple member 22 is attached to the high-pressure fluid. In some cases, it could not be removed from the injection plug 20.
[0014]
Therefore, the applicant generally removes the portion protruding from the hole safely and in a short time without injecting the high-pressure fluid injection plug from the hole even if the injection agent is injected at a high pressure as shown in FIG. Invented and applied for a patent for a high-pressure fluid injection plug that can be folded and filled with a material (Japanese Patent Application No. 9-225550)
[0015]
[Problems to be solved by the invention]
However, the leakage of the injection agent such as synthetic resin and cement paste, the spray-like blowout, etc., which were the conventional problems, can be solved, but the check screw is formed inside the male screw member 44. Since the large-diameter check valve portion 44c and the stem portion 44a having a male screw 44b cut off on the outer peripheral surface thereof are integrally formed, a bolt-like shape is formed. The long hole processing for forming the central hole 44d penetrating in the longitudinal direction of 44 has a problem that it takes much labor and cost.
Further, when the male screw member 44 enters the nipple member 42 and the packing member 46 expands in the circumferential direction, the male screw 44b portion rarely breaks.
[0016]
Accordingly, the present invention provides a high-pressure fluid injection device and a high-pressure fluid injection device that can further increase the strength of the threaded portion and can be manufactured in large quantities and at low cost with a general-purpose machine without using a special manufacturing machine or the like. It aims at providing the injection agent discharge member to be used.
[0017]
[Means for Solving the Problems]
In order to solve the above problems, the present invention according to claim 1 injects high-pressure fluid in an injecting agent discharge member used in a high-pressure fluid injection device for injecting high-pressure fluid into a hole drilled in a wall. A nipple head having an outer shape that can be closely connected to an injection coupling of an apparatus to be operated, a rotating means engaging portion that engages with a rotating means such as a spanner on the outer peripheral surface, and a hammering means such as a hammer. A nipple main body in which a notch that can be folded is formed, and a female thread portion is threaded over a predetermined length on an inner peripheral surface of a central hole that penetrates in a longitudinal direction formed inside. A high-pressure fluid injection nipple formed integrally; a through-hole that has a male screw portion screwed into a female screw portion provided in a central hole of the nipple main body and is threaded on the outer peripheral surface and penetrates the inside in the longitudinal direction Pies with drilled And parts, a infusate discharge member having a discharge portion which check valve ejects infusate provided inside for preventing the backflow of disposed at an end of the pipe section infusate discharge portion And the pipe part are formed as separate members, and the injection agent discharge part is constructed by connecting the discharge part to one end side of the pipe part ; and the pipe part of the injection agent discharge member is mounted. A cylindrical packing member formed of an elastic body, and the pipe member is expanded in the radial direction by screwing the pipe portion into the center hole of the nipple body, thereby drilling in the wall portion. It is characterized in that it is fixed in close contact with the hole.
[0018]
In order to solve the above-mentioned problems, the present invention described in claim 2 provides a high-pressure fluid injection device provided with the injection discharge member according to claim 1 .
[0020]
DETAILED DESCRIPTION OF THE INVENTION
The high-pressure fluid injection device according to the present invention and the infusate discharge 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 an embodiment of the high-pressure fluid injection device according to the present invention, FIG. 2A is an exploded sectional view of the embodiment shown in FIG. 1, and FIG.
[0021]
First, and high pressure fluid injection apparatus 10 according to the present invention, as schematically, a high-pressure fluid injection nipple 12, the infusion discharge member 1 4, and a cylindrical packing member 16.
[0022]
The high-pressure fluid injection nipple 12 is integrally formed with a nipple main body 12b having a nipple head portion 12a and a rotating means engaging portion that engages with rotating means such as a spanner. Since they are integrally formed, there is no space or space for the injected fluid to leak between the nipple head 12a and the nipple body 12b.
The high-pressure fluid injection nipple 12 can be made of steel or brass like a conventional grease injection nipple, and can be easily manufactured by using its manufacturing technique. The outer shape of the nipple head 12a can be fluidly connected to a device for injecting a high-pressure fluid, such as a high-pressure pump injection coupling or a chuck type nozzle. 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, and may be, for example, a cylindrical shape.
[0023]
In the preferred embodiment shown, the entire nipple body 12b is composed of a long nut having a hexagonal cross section. The high-pressure fluid injection nipple 12 can be rotated regardless of which part of the nipple main body 12b is engaged with a rotating means such as a spanner, and the operation is facilitated. Of course, the hexagonal nut portion may be formed only at a portion adjacent to the nipple head portion 12a even if the whole does not have a hexagonal cross section. The outer shape of the nipple main body 12b varies depending on what is selected as the rotating means. For example, the outer shape of the nipple main body 12b is a quadrangle for a square spanner, and the outer shape of the rotary jig having a pair of protrusions is a shape having a pair of holes fitted therein.
[0024]
A cutout portion 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 hammering means such as a hammer. The notch portion 12c makes a round around the outer peripheral surface of the nipple main body 12b of the high-pressure fluid injection nipple 12, and the cross-sectional shape thereof is a shape in which the nipple main body 12b can be tapped at the position of the notch portion 12c by hammering means H such as a hammer. For example, it is U-shaped, V-shaped or trapezoidal. Since the cutout portion 12c makes a round on the outer peripheral surface of the nipple main body 12b, the high pressure fluid injection nipple 12 on the nipple head 12a side is struck by the cutout portion 12c regardless of which direction the high pressure fluid injection nipple 12 is beaten. be able to.
[0025]
As best shown in FIG. 4, the position of the innermost part of the female screw 12e cut in the central hole 12d of the high-pressure fluid injection nipple 12 is closer to the end face side of the nipple body 12b than the position where the notch 12c is formed. It is set to become. The pipe member 14a in which the male screw 14b of the injecting agent discharge member 14 is cut is screwed into the female screw 12e of the center hole 12d of the nipple main body 12b. The depth of the pipe member 14a is in front of the position where the notch 12c is formed. It is. Thereby, when the high pressure fluid injection nipple 12 is beaten by the striking means H, the high pressure fluid injection nipple 12 on the nipple head 12a side from the notch portion 12c does not enter the pipe member 14a of the injecting agent discharge member 14, and therefore, It can be reliably separated and removed.
[0026]
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 drilled in the concrete wall.
[0027]
The infusate discharge member 14 used in the high-pressure fluid injection device according to the present invention is composed of two members, a pipe member 14a and a discharge portion 14e. The pipe member 14a has a through-hole 14c penetrating in the longitudinal direction. Further, on the outer peripheral surface of the pipe member 14a, a male screw 14b that is screwed into a female screw 12e provided in the center hole 12d of the nipple main body 12b of the high-pressure fluid injection nipple 12 is screwed. And the pipe member 14a is connected and fixed to the one end part side of the discharge part 14e. The injecting agent 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.
[0028]
The discharge portion 14e is provided with a recess 14f that receives the pipe member 14a, and the discharge port 14k and the recess 14f are communicated with each other. A female screw 14p is formed in the inner wall of the recess 14f so as to be screwed with a male screw 14b provided on the outer peripheral surface of the pipe member 14a. Therefore, both members are connected by screwing the pipe member 14a into the recess 14f of the discharge portion 14e. Of course, the connection method of the pipe member 14a and the discharge part 14e is not restricted to this, For example, the engaging part is provided in the vicinity of the edge part of the pipe member 14a of the side connected with the recessed part 14f, and the recessed part 14f, respectively. A method may be employed in which both member members are fixed when the member 14a is fitted into the recess 14f.
[0029]
A check valve 14g for preventing the backflow of the injection agent 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 a part of the inner surface of the discharge portion 14e protrudes inward so that the ball 14h does not fall out toward the concave portion 14f. And the discharge part 14e is made into the shape by which the front-end | tip part by the side of the discharge outlet 14k was bent inside, The one end part of the compression spring 14j is latched in this part, and the ball 14h is pressed with predetermined force. Needless to say, the check valve is not limited to this, and may be constituted by a leaf valve and a ball, or may be constituted by other methods.
[0030]
The packing member 16 has a cylindrical shape having a hole in the center for insertion of the pipe member 14a of the injecting agent discharge member 14, and is formed of, for example, natural rubber, synthetic rubber, synthetic resin, or the like. . And the washer 19a and the internal toothed washer 19b are inserted in the both ends of the packing member 16.
The high-pressure fluid injection device 10 is formed by assembling the above-described members.
[0031]
Next, a method for using the high-pressure fluid injection device according to the present invention will be described with reference to FIG.
A hole 36 having a diameter slightly larger than the outer diameter of the high-pressure fluid injection device 10 is drilled in a repair target, for example, a building wall 34. The hole 36 is generated in the wall 34 and needs to be continuous with the crack 34a. The high-pressure fluid injection device 10 is inserted into the hole 36 (see FIG. 4A), and the high-pressure fluid injection nipple 12 is rotated in the direction of arrow X by a rotating means such as a spanner. The packing member 16 attached to the pipe member 14a of the injecting agent discharge member 14 is compressed in the longitudinal direction between the discharge portion 14e and the end face of the nipple main body 12b and expands in the radial direction to be tightly fixed in the hole 36. . Thereafter, an injection coupling (not shown) of an apparatus used for injecting fluid is attached to the nipple head 12a, and an injection agent such as synthetic resin or cement paste is injected (FIG. 4B). ).
[0032]
Immediately after the injection of the injection, the portion protruding from the hole 36 of the high-pressure fluid injection nipple 12 is beaten by a hammering 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 detached. On the other hand, the female screw 12e side from the notch 12c of the nipple main body 12b remains in the high-pressure fluid injection device 10 while being screwed with the male screw 14b cut in the pipe member 14a of the injecting agent discharge member 14. Accordingly, since the cylindrical packing member 16 remains pressed in the longitudinal direction, it remains tightly fixed in the hole 36 (see FIG. 4D). Therefore, even when the synthetic resin or cement paste is injected at a high pressure, for example, a pressure exceeding 30 kg / cm ² , the high-pressure fluid injection device 10 does not come off or loosen from the hole 36, and the injection is sprayed. Accidents can be eliminated. Therefore, the injection agent can be injected at a considerably high pressure, and the synthetic resin or the cement paste can be injected into cracks that are not connected to the outer surface, which is a branch line as shown in FIG.
[0033]
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, as in the case where the scaffold is assembled, the scaffold can be immediately moved to another position, and the work efficiency is improved.
The high-pressure fluid injection device 10 of the present invention has been described by taking an example of repairing a crack in a concrete wall, but it goes without saying that it can be used for other purposes.
[0034]
【The invention's effect】
In the high-pressure fluid injection device according to the present invention, the injection discharge member to be used is composed of two members, that is, a pipe member and a discharge portion, so that it can be supplied in large quantities and at low cost. That is, when the male screw member has a bolt-like shape integrally formed with a check valve portion having a large diameter in which a check valve is formed and a stem portion in which a male screw is cut on the outer peripheral surface, However, according to the present invention, it can be used simply by cutting a screw on the outer peripheral surface of a pipe that is already mass-produced and is a general-purpose product. Therefore, there is an effect that it is possible to manufacture an injection agent discharging 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.
[0035]
In addition, since the pipe member is a general-purpose product, it can be selected from a wide variety of materials, so the range of choice has expanded, and pipe members made from materials with high mechanical strength can now be manufactured. . Therefore, there is an effect that it is possible to avoid the breakage of the screw at the time of use that occurs when the screw member has a bolt shape as in the prior art.
[0036]
Furthermore, since the discharge part is a separate member, it is easy to provide a check valve. In other words, a bolt-like shape in which a large-diameter check valve portion and a stem portion are integrally formed on a male thread member requires labor and cost for processing the check valve, making mass production difficult and costly. However, according to the present invention, since the discharge part can be manufactured in large quantities and at a low cost with a general-purpose machine without using a special manufacturing machine, etc. In combination, it is possible to provide a high-pressure fluid injection device that can be mass-produced at low cost.
[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.
2A is an exploded cross-sectional view of the embodiment shown in FIG. 1, and FIG. 2B is a side view thereof.
FIG. 3 is a longitudinal sectional view of an embodiment of an injecting agent discharge member according to the present invention.
4A to 4D are longitudinal sectional views of steps in the method of using the high-pressure fluid injection device of FIG.
FIG. 5 is a longitudinal sectional view of a conventional high-pressure fluid injection device.
FIGS. 6A to 6C are longitudinal sectional views of steps in a conventional method for using a high-pressure fluid injection plug. FIGS.
[Explanation of symbols]
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 screw, 14c Through hole,
14e discharge part, 14f recessed part, 14g check valve,
14h ball, 14j compression spring, 14k discharge port,
16 Packing member 19a Washer 19b Internal toothed washer 34 Wall 34a Crack 36 Hole

Claims (2)

In an infusate discharge member used in a high pressure fluid injection device for injecting a high pressure fluid into a hole drilled in a wall ,
A nipple head having an external shape that can be intimately connected to an injection coupling of a device that injects high-pressure fluid, a rotating means engaging portion that engages with a rotating means such as a spanner on the outer peripheral surface, and a hammer or the like A notch portion that can be struck by a striking means is formed, and a female screw portion is threaded over a predetermined length on the inner peripheral surface of a central hole that penetrates in the longitudinal direction and is bored inside. A high-pressure fluid injection nipple formed integrally with the nipple body;
A pipe portion in which a male screw portion that is screwed into a female screw portion provided in a central hole of the nipple body is threaded on the outer peripheral surface and a through-hole penetrating the inside in a longitudinal direction is formed; An injectant discharge member having a discharge part for discharging the infusate provided inside thereof with a check valve disposed at an end of the pipe part to prevent backflow of the infusate , the discharge part and the Each of the pipe parts is formed as a separate member, and the injectant discharge part is configured by connecting the discharge part to one end side of the pipe part ; and
A cylindrical packing member mounted on the pipe portion of the injecting agent discharge member and formed of an elastic body;
The pipe member is screwed into the center hole of the nipple body, whereby the packing member is expanded in the radial direction, thereby being closely fixed to the hole formed in the wall portion. Injectant discharge member used in the apparatus. A high-pressure fluid injection device comprising the injection discharge member according to claim 1 .

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