KR960005723B1 - Dual direction conversion valve - Google Patents

Abstract

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Description

2-way selector valve

1 is a longitudinal sectional view of a two-way switching valve of the first embodiment;

2 is a cross-sectional view taken along the line X-X of FIG.

FIG. 3 is a longitudinal sectional view showing a state in which the valve body of FIG. 1 is reversely rotated and restrained at the other end of the engaging piece. FIG.

4 is a cross-sectional view taken along the line Y-Y of FIG.

5 is an explanatory perspective view of the valve body and the female joint of the first embodiment.

6 is an enlarged cross-sectional view around the inclined step of the valve element.

7 is a longitudinal sectional view of the two-way selector valve of the first embodiment attached to an excavation drill;

8 is an excavated side view of the excavation bottom hardening liquid injection method incorporating a two-way switching valve;

9 is an enlarged cross-sectional view around the gas opening of the second embodiment.

10 is an enlarged cross-sectional view of the gas opening attention of the second embodiment.

* Explanation of symbols for main parts of the drawings

1: valve box 2: valve system

3: hook piece 4: excavation drill

8 micro switch 11 gas opening

12: liquid opening 21: notch

23: supply port 24: outlet

25: supply path

[Industrial use]

According to the present invention, after the excavation is performed with a pneumatic drill drill by the operation of compressed air, the upper solidification liquid is switched from the compressed air to the bottom solidifying liquid at the upper position of the excavation drill, and the bottom solidifying liquid is continued without first lifting the excavation drill into the ground. It relates to a two-way selector valve used in the excavation bottom hardening liquid injection method that can be injected.

It is used in the field of foundation pile construction which installs the pile already made on the ground which has rock or rock etc. with low noise and low vibration.

[Prior art]

Conventionally, the already produced piles that have been hit by hitting have been excavated with holes approximately equal to the pile volume to be installed with low noise and low vibration, and then moved to a buried method. Since this method damages the pile base or pile tip ground, the bearing capacity of the pile is weakened, and the bottom hardening liquid (such as cement milk) is injected for the purpose of improvement.

Here, high-pressure strike type drilling drills that exert power for rock and other excavation by using the impact movement by compressed air operation (JP-A 55-25265, J-57-35356, J-K Japanese Laid-Open Publication No. 58-5354, etc.), and the down-the-hole hammer is referred to by the name of the super drill (Japanese Patent Publication No. 63-52197, etc.). Compressed air is sent to the excavation drill (4), and the reciprocating motion of the piston is transmitted to the button bit (54) to excavate with the force of the button bit.

[Problem to Solve Invention]

By the way, when the excavation drill is excellent in excavation such as a rock layer or the excavation formed in the ground to be excavated, and then used as a device of construction to bury the foundation pile by sedimenting the already produced concrete piles, etc. Once the entire drilling drill was not taken out to the ground, it was impossible to inject the bottom hardening liquid, which resulted in the drawback of taking too much air.

Rapidly raising the excavation drill to improve this caused the collapse of the hole wall caused the height of the pile to stop. On the other hand, if the bottom consolidation liquid is to be reduced in the excavation drill having a complicated mechanism by taking a method of converting and injecting the bottom consolidation liquid from the air into the air inlet 41 of the excavation drill 4 through which compressed air flows. As a result, the excavation drill lost its function.

The present invention overcomes the above problems, and when excavating a pile hole with a pneumatic percussion type drilling drill, when pulling out such a device, at the same time to leave the bottom hardening liquid on the pile hole bottom to reduce the air shortening An object of the present invention is to provide a two-way switching valve that can be switched from compressed air to a bottom solidifying liquid at an upper position of the excavation drill so that the solidifying liquid injection method can be adopted.

[Means for solving the problem]

In the first invention, the two-way switching valve is an excavation bottom hardening liquid injection method in which a bottom hardening liquid is injected by switching from compressed air to a bottom hardening liquid at an upper position of the excavation drill after excavation by an excavation drill during a pneumatic strike. As a valve box (1) and a columnar body having a gas opening for sending compressed air to the excavation drill and a liquid opening for guiding the bottom hardening fluid out of the excavating drill, the cylindrical cylinder is placed on the bottom of the user's cylindrical shape. The valve body 2 having a supply path penetrating forward and backward and passing from an supply port provided at the center of the upper surface to an outlet port provided eccentrically near the outer surface of the lower surface, and having an arcuate cutout at the circumferential wall of the columnar body 2 And a locking piece (3) accommodated in the cutout portion and the space formed by the valve box, and fixed to the valve box. It is characterized in that the outlet is coincided with one end of the locking piece so that the outlet is coincident with the gas opening, and the valve body is reversely rotated and restrained at the other end of the locking piece.

The two-way switching valve according to the second aspect of the present invention provides a signal signal to the contact surface of the valve body with the engaging piece so that the valve body is displayed on the operation panel of the ground operator when the valve body is rotated forward or reversely and the switching is completed. It is characterized by installing a micro switch.

Here, "forward rotation" means the rotational direction of the motor at the time of excavation, and "reverse rotation" means the rotational direction of the motor when the excavation drill is raised to the ground after completion of excavation.

[Action]

Pneumatic impact drilling drill is the motor and the reducer gives the rotation to the excavation drill, the button bead to be excavated while applying the rotation and impact, according to the two-way switching valve of the present invention when the reducer is rotated forward to the valve The sieve also rotates forward. Then, after one end of the cutout part is caught, the catching member caught by the valve body and the valve box to which it is fixed are rotated forward so that the valve box rotates forward to connect with the valve box. During this excavation, since the outlet port coincides with the gas opening and the valve body is pressed by the cut-off part, this does not occur.

On the other hand, after excavating a pile hole, when a reduction gear is reversed, a valve body is restrained by the other end of a latching piece. In this case, the valve body is pushed to the other end of the notch by the reverse rotation reducer. In this case, since the outlet port coincides with the opening port, when the bottom solidifying liquid is injected into the supply port while raising the excavator under this state, The bottom firming liquid does not enter and can fill the bottom of the pile hole with the desired bottom firming liquid.

EXAMPLE

Hereinafter, an Example demonstrates this invention concretely.

(1) Example 1

1 to 8 illustrate one embodiment of a two-way selector valve according to the present invention, and include a valve box 1, a valve body 2, and a locking piece 3.

The outer diameter of the valve box 1 is substantially the same as the diameter of the screw rod 51, forms a user cylinder shape, and the gas opening 11 and the liquid opening 12 are provided in the bottom face at equidistant distance from the center. The gas opening 11 communicates with the air inlet 41 of the excavation drill 4 via the air hole 13. On the other hand, the liquid opening 12 communicates with the conduit 61 provided on the outer circumferential wall of the valve box via the passage hole 14 reaching the side wall of the valve box 1.

The conduit 61 is provided to the lower end of the cell body 6 covering the excavation drill 4 (Fig. 7).

The bottom of the valve box 1 is provided with a hexagonal main hole 15 fitted into the hexagonal main nozzle 42 of the excavation drill 4. 16 denotes a pin groove, the hexagonal main nozzle 42 is subtracted into the hexagonal main hole 15, and the pin 43 is inserted into the valve box 1 to be integrated with the excavation drill 4.

The valve body 2 is a cylindrical body which is mounted on the bottom face 17 of the valve box 1 and has the notch 21 which cut | circulated a part of bottom part in circular arc shape at approximately 270 degree angle (FIG. 1, 5th). Degree)

The circumferential portion 22 side which is not cut off slides the inner circumferential wall of the valve box 1, and the cutout portion 21 slides the inner circumferential wall of the catching piece 3 without causing side shake. (2) is able to rotate forward and backward within an approximately 180 degree angle (FIG. 2).

Here, the locking piece 3 is an arc-shaped body that suppresses the rotation range of the valve body within approximately 180 degrees, and is accommodated in the space formed by the cutout portion 21 and the valve box 1, and inside the valve box 1. It is attached to the main wall. The locking piece 3 height is slightly lower than the cutting height of the notch 21 (FIG. 1).

The valve body 2 is provided with a supply path 25 penetrating through the outlet port 24 eccentrically provided near the bottom outer periphery of the supply port 23 provided at the center of the upper surface.

The supply passage 25 is connected to the through hole 71 vertically passing through the female joint 7 fixed to the valve body 2, and the through hole 71 connects the screw rod 51 and the swivel 52. Passed through the compressed air pipe (53). Moreover, the female joint 7 is provided with the pin groove 73 in the hexagonal circumferential joining part 72, and the general part 74 which fixes the joint part 72 to the valve body 2 is circumferential.

The outlet 24 is joined to the gas opening 11 when the valve body 2 is rotated forward (in this embodiment, referred to as right turn) and stopped at the right end of the locking piece 3 (FIGS. 1 and 2). On the other hand, when it comes to the position which restrained from the left end of the locking piece 3 by reverse rotation (refering to left rotation in this embodiment), it is made to join the liquid opening 12 (FIG. 3, FIG. 4).

Reference numeral 26 denotes a seal ring of copper attached to it by increasing the diameter of the supply passage 23 near the outlet 24. The reason why copper is used is because adhesiveness is increased. Although not shown in the present embodiment, the periphery of the gas opening 11 and the liquid opening 12 is also made of copper to improve the sealing property.

Reference numeral 27 denotes an elastic body made of foamed urethane resin forming a hollow disk shape, and the seal ring 26 is always urged to the bottom face 17. In order to improve the sealing.

When the seal ring 26 is in the shape of a tip taper and coincides with the gas opening 11, it is pressurized as the elastic body 27, enters the gas opening 11, and comes into a close state to prevent leakage. When the valve body 2 reversely rotates, the process of escaping from the gas opening 11 becomes a state in which the seal ring 26 is introduced into the valve body 2, and the valve body 2 is restrained by the locking piece 3. When the outlet 24 coincides with the liquid opening 12, the sealing ring 26 again protrudes from the elastic body 27 and enters the liquid opening 12 (FIG. 3).

The valve body 2 is provided with an inclined step 212 at both ends 211 of the notch 21, and the micro switch 8 is attached thereto, and the ground operator 81 has completed the forward or reverse rotation. The signal can be sent to be displayed on the operation panel 82 of Fig. 8 (Fig. 8). The backup power supply board 83 is assembled inside the valve body (FIG. 6).

As shown in FIG. 6, when the valve body 2 rotates and contacts the locking piece 3, the limiting micro switch 8 is easy to operate, and the locking piece 3 also forms a slope 31. As shown in FIG. . It is wirelessly transmitted to the operation panel 82. Specifically, the valve body 2 is restrained on the locking piece 3, and when the micro switch 8 enters, the supply passage 25, the through hole 71, and the screw rod A radio wave signal is transmitted by skipping the hollow part through which the compressed air of 51 passes.

Reference numeral 9 represents a platen. The platen 9 is made up of a hollow platen, and after the valve body 2 is placed inside the valve box 1, the platen 9 is brought into contact with the side surface of the cone of the upper part of the valve body 2 so that the valve box is brought into contact with the valve box. It is fixed to (1). This is to eliminate the fluctuation of the valve body 2 in the vertical direction.

The example which performed the construction which inject | poured the bottom hardening | curing liquid to the pile landfill site to be piled up using the 2 way switching valve comprised in this way is shown (FIG. 7, 8).

7 shows a state in which the two-way selector valve of the present invention is attached to the excavation drill 4. Numeral 8 denotes a cell body covering the excavation drill 4, and the hexagonal opening on the upper surface is fitted into the hexagonal main nozzle 42 to be integrated with the excavation drill 4. The outer wall of the cell body 6 is provided with a conduit 61 from the upper end to the lower end. The top and conduit 61 here lead to the through hole 14. The valve box 1 is directly attached to the hexagon nozzle 42 of the excavation drill 4 with a pin 43. To reduce the seam.

Reference numeral 95 denotes a vibration absorber. The head part of the male joint 963 is fitted into the hexagonal main hole 962 of the female joint 951 having a hexagonal main hole, and the male joint 963 can move upward. 964 and 965 denote elastic bodies that are elastically deformed. The elastic bodies 964 and 965 absorb the strike reaction of the button bit 54.

At the time of excavation, the motor 91 and the reducer 92 rotate forward, and the screw rod 51, the vibration absorber 95, and the valve body 2 connected thereto also rotate forward. When the valve body 2 rotates forward and restrained by the locking piece 3, the micro switch 8 operates to inform the operation panel 82 of the operator 81 that the switching is completed. In this state, the compressed air is supplied from the compressed air pipe 53. The button bit 54 can then be operated to excavate.

Here, since the motor 91 and the reducer 92 are excavated while giving rotation to the excavation drill 4, the valve box 1 and the cell are in a state in which the valve body 2 presses the catching piece 3 during the excavation. The base 6 and the excavation drill 4 are rotated forward, and an external force that matches the gas opening 11 continues to operate at the outlet 24 (FIGS. 1 and 2). For this reason, malfunction does not occur.

Reference numeral 55 denotes a middle period, 56 a lead, 57 a wire, 58 a slide bracket, and 59 a support column.

When the desired pile hole is excavated and the motor 91 and the reducer 92 are rotated in reverse, the screw rod 51, the vibration absorber 95, and the valve body 2 also rotate in the reverse direction. When the valve body 2 abuts on the other end of the locking piece 3, the micro switch 8 attached to the valve body 2 enters, and the operation panel 82 of the operator 81 is notified that the switch is completed.

In addition, the valve box 1, the excavation drill 4, and the cell body 6 remain stopped until the reverse rotation is completed during the switching. When the conversion is completed, the outlet 24 is maintained in a state joined with the liquid opening 12. Thus, when the bottom fixing liquid is injected into the compressed air pipe 53 while the motor 91 and the reducer 92 are reversely rotated, and the excavation drill 4 is raised, the bottom fixing liquid is the screw rod 51 and the through hole 71. ), The vibration absorber 95, the supply passage 25 of the valve element, the liquid opening 12, the passage hole 14, the conduit 61, and the bottom firming liquid is left at the bottom of the pile hole.

When the excavation drill is pulled up, the valve body 2 rotates in the reverse direction, pressurizes the locking piece 3 to rotate the valve box 1, the excavation drill 4, and the cell body 6 in reverse. 24 is subjected to a forced external force to be joined to the liquid opening (12). Therefore, the bottom firming liquid does not flow into the excavation drill. Thus, at the time when the excavation drill 4 is raised to the ground, the desired bottom hardening liquid is reliably filled in the bottom of the pile hole. Finally, the pile already made in this pile hole is settled and completed.

[(2) Example 2]

In this embodiment, after the elastic body 27 is placed thereon by increasing the hole diameter near the gas opening 11 of the air hole 13 and the liquid opening 12 of the through hole 14, the seal ring 26 ) (Figure 9, 10).

FIG. 9 illustrates the gas opening 11. When the water opening 11 is released from the outlet 24 and the seal ring 26 is touching the bottom of the valve body 2, the air hole is pressurized downward. (13) We are exiting in me. When the valve body 2 rotates and the outlet port 24 is joined to the gas opening 11, the sealing ring 26 enters the outlet port 24 by the elastic force of the elastic body 27 to increase the sealability (first). 10 degrees) and the surroundings of the liquid opening 12 take the same structure. The other structure is the same as that of Example 1.

[(3) Effect of Example]

The two-way switching valve according to the embodiment has a simple structure, and when this is used, it is possible to ensure the replacement of the compressed air and the bottom hardening liquid. The rotation operation of the motor 91 and the reducer 92 could be used for the switching operation as it is.

In addition, depending on the internal structure of the two-way switching valve, the rotational action of the motor acted as an external force to reliably maintain the supply path of the compressed air or the bottom hardening liquid. In detail, the forward rotation of the motor 91 and the reducer 92 acts as an external force for joining the outlet opening 24 to the gas opening 11, and reverse rotation of the outlet opening 24 is connected to the liquid opening 12. Since it acts as an external force for joining, the leakage of compressed air and the bottom hardening liquid were hardly guided by the excavation drill 4.

In addition, when the valve body 2 is rotated forward or reverse and the switching is completed, the micro switch 8 is operated to be transmitted to the operator 81, so that the operation can be performed with more accurate information. Incorrect operation of the operator could also be prevented.

In this way, the excavation drill was reversed and raised to the ground. Simultaneous with this operation, the bottom solidification liquid was reliably discharged to the bottom of the pile hole, and the air was greatly shortened.

In addition, in this invention, it is not limited to what was shown in the said specific Example, A various change is possible within the scope of this invention according to the objective and a use. The micro switch may use magnetic force or the like in addition to the limit method. The transmission to the operator is not limited to wireless but also includes laying wiring. The display on the operation panel of the ground operator may be not only a visual display but also an audible display. The elastic material may be any material as long as it is made of a material that is elastically deformed, such as synthetic resin or synthetic rubber.

[Effects of the Invention]

When the two-way switching valve of the present invention is used as described above, after excavating the pile hole with a pneumatic impact drilling drill, it is possible to leave the bottom firming liquid in the pile hole when extracting the pile hole. The process can be completed in one process, and work efficiency can be greatly improved.

Claims (2)

A user of the two-way switching valve used in the excavation bottom hardening liquid injection method in which the bottom hardening fluid is injected by switching from the compressed air to the bottom hardening liquid at the position above the excavation drill after the excavation by the pneumatic strike drilling drill. A valve box (1) having a gas opening for sending compressed air to the excavation drill and a liquid opening for guiding the bottom solidifying liquid out of the excavation drill on the bottom of the cylindrical shape, forms a columnar body, and is mounted on the bottom of the valve box for forward and reverse rotation. A valve body (2) having a supply path penetrating through an outlet port eccentrically installed near the lower surface of the supply port provided in the center of the upper surface, and having an arc-shaped cutout portion in the circumferential wall of the columnar body, the cutout portion and the above It consists of the engaging piece 3 accommodated in the space formed by the valve box, and fixed to the said valve box, The valve body rotates forward. When the stop piece is restrained at one end, the outflow port coincides with the gas opening, and when the valve body is reversely rotated and restrained at the other end of the stop piece, the outlet port is configured to coincide with the drop opening. 2-way selector valves used in. According to claim 1, wherein when the valve body is rotated forward or reverse, the switching is completed, a signal is signaled to the contact surface between the valve body and the engaging piece so as to display on the operation panel of the ground operator that the switching is completed. 2-way switching valve, characterized in that the micro switch is installed.