JPS6242979Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a swivel connection device for grout injection, and its purpose is to facilitate the attachment and detachment of the injection pipe,
Another object of the present invention is to provide a swivel that can be inserted and removed without causing twisting of the inner tube of the injection tube.

When delivering various injection drugs, one method is to use a concentric injection tube, but in order to prevent clogging in the tube and ensure a sufficient flow path cross-sectional area, it is recommended to use a parallel injection tube with inner tubes arranged side by side. It is more advantageous to use However,
When trying to connect this injection pipe and swivel,
When connecting, circumferential torque acts on the inner tube and causes it to twist, or rotational torque applied to the outer tube when drilling a hole may be transmitted to the inner tube and cause it to twist, causing trouble.

The present invention has been developed in view of these points, and will be described below with reference to embodiments shown in the drawings.

In this example, three flow paths are secured, and the swivel outer tube 1 has a first block 3 having a C liquid feed port 2, a second block 5 having a B liquid feed port 4, and a liquid A feed port. A third block 7 having a feed port 6 is screwed together to form a swivel body. Reference numeral 8 denotes a swivel inner tube, which is rotatably supported within the swivel body via a bearing 9. Further, a swivel side A liquid passage 10 and a swivel side B liquid passage 11 are formed in parallel along the longitudinal direction in the swivel inner tube 8, and the base end of the B liquid passage 11 is closed by a blind plug 12. There is.

Reference numeral 13 denotes an annular sealing having a rectangular cross section and sealing the gaps between the blocks 3, 5, 7 and the swivel inner tube 8. The A liquid supply port 6 is connected to the A liquid path 10.
The B liquid supply port 4 communicates with the B liquid path 11 through the introduction port 14 formed in the swivel inner tube 8, and the C
As shown in the cross section, the liquid supply port 2 passes through the side channels 8a, 8a of the swivel inner tube 8, and connects to the inner joint 2.
It communicates with the side channels 15, 15 of No.6. Reference numerals 16 denote drain holes formed in the seal portions of the blocks, and if liquid flows out from these drain holes, it can be determined that there is an abnormality in the sealing 13.

Reference numeral 17 denotes an injection tube outer tube body, inside which inner tube bodies 18 and 19 are arranged side by side. These are connected to a distal end device of an injection tube (not shown). Reference numeral 20 denotes a protruding joint in which a liquid A guide path 21 and a liquid B guide path 22 are formed, and are connected to the inner tube bodies 18 and 19, respectively. The C liquid guide path 23 is made up of a cutout portion of the protruding joint 20 and a gap between the outer tube body 17 and the inner tube bodies 18 and 19.

Further, the outer tube main body 17 is threadedly connected to the swivel inner tube 8 via outer joints 24 and 25 that form part of the outer tube. Inside the outer joints 24 and 25 are inner joints 26,
27 is installed inside. An independent A liquid path 28 and a B liquid path 29 are formed in the inner joint 26, and the A liquid path 28 is connected to the A liquid guide path 21 of the protruding joint 20.
After the B liquid path 29 exits from the inside, it passes through the gap between the inner joint 26 and the inner joint 27 and communicates with the B liquid guide path 22. The C liquid path 30 serves as a gap between the inner joint 27 and the outer joint 25 and a cutout of the inner joint 27.

32 and 33 are joints that connect the A liquid path 10 and B liquid path 11 of the swivel inner tube 8, and the A liquid path 2 of the inner joint 26.
8 and B liquid path 29.

To inject grout, when liquids A, B, and C are fed from the feed ports 6, 4, and 2, respectively, liquid A flows through channels 10, 31, 28, 21, and 18 in the order of B.
The liquid flows in the order of channels 11, 32, 29, 22, 19,
The C liquid flows in the order of flow paths 8a, 15, 30, and 23, respectively.

Also, when attaching and detaching the injection tube, please use the swivel inner tube 8.
Insert the joints 32 and 33 into the joints 3 and 3.
2 and 33 and the inlet on the base side of the inner joint 26 are fitted together, and the inner joint 27 is screwed onto the inner joint 26. Thereafter, the injection tube main body shown in FIG. 2 and the swivel main body shown in FIG. 1 are brought into contact and screwed together. In this state, when the outer joint 25 is rotated in the circumferential direction, as the outer joint 25 and the outer tube main body 17 are screwed together, the tip of the protruding joint 20 enters the outlet of the inner joint 26, and the A liquid The passage 28 and the A liquid guide passage 21 communicate with each other,
The entrance of the B liquid guide path 22 faces into the inner joint 27 and communicates with the B liquid path 29. Further, at this time, the C flow path 30 communicates with the C liquid guide path 23. In this way, each channel of the swivel body communicates with each channel of the injection tube body. To remove it, do the opposite.

On the other hand, when the injection tube outer tube main body 17 is fixed with a wrench so as not to rotate in the circumferential direction, and the outer joint 25 is rotated in the circumferential direction, the outer joint 24 and the swivel inner tube are rotated along with this rotation. 8. The joints 32 and 33 and the inner joints 26 and 27 rotate, and as the injection tube main body 17 and the outer joint 25 screw together, the joint 20 is fitted into the inner joints 26 and 27. At this time, the inner joints 26 and 27 rotate, but since the inner joints 26 and 27 are fitted concentrically with the joint 20, they are fitted linearly and concentrically, parallel to each other on the swivel side. In the case of connecting a plurality of parallel inner tubes with a plurality of parallel inner tubes of the injection tube, it is possible to prevent twisting of the inner tubes as seen in (for example, Utility Model Applications No. 54-177104, 55-94988, etc.).

As a result, the protruding joint 20 fits linearly into the inner joints 26, 27. Therefore, when fitting, the members constituting the flow path will not be twisted into each other, and the sealing O-ring will not be damaged. Furthermore, when the parallel channels are made to communicate with each other, the inner joints 26 and 27 and the protruding arm 20 are used to guide the parallel channels once into the concentric channels and then guide them back into the parallel channels. This also guarantees the linear insertion described above.

On the other hand, when the outer joints 24 and 25 are rotated while being held while drilling, the entire outer tube portion of the injection tube rotates. Since the swivel inner tube 8 is screwed into the outer joint 24, it rotates together with the outer joint 24, and the inner tube portion of the injection tube body also rotates accordingly. Therefore, since the inner tube portion of the swivel body and the inner tube portion of the injection tube body rotate at the same time, they do not twist relative to each other.

As described above, in the present invention, when connecting the parallel channels, the concentric swivel side joint and the injection pipe joint are inserted and fitted, so that the insertion and removal at the time of connection are smooth. At the same time, it is possible to prevent the swivel-side inner tube portion and the injection tube-side inner tube portion from twisting during hole drilling, etc., and to reliably eliminate troubles caused by this.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the swivel part according to the present invention,
Figure 2 is a sectional view of the main body of the injection tube, Figure 3 is -
4 is a cross-sectional view taken along the line arrow,
FIG. 5 is a perspective view of the inner tube portion of the swivel. 2, 4, 6... feeding port, 8... swivel inner tube,
17... Injection tube outer tube body, 18, 19... Inner tube body, 20... Butt joint, 24, 25... Outer joint,
26, 27...Inner joint.

Claims (1)

[Scope of utility model registration request] A swivel inner tube that is rotatably supported within the swivel body and has a plurality of independent parallel flow paths formed along the longitudinal direction, a swivel outer tube that is integrated with the swivel inner tube, and an injection tube outer tube. A plurality of injection tube inner tubes are provided, each forming a plurality of parallel independent flow paths, and the parallel flow paths at the end of the swivel inner tube on the side of the injection tube are used as independent concentric flow paths. comprising a swivel joint for guiding, and an injection pipe joint at the swivel end of the injection pipe inner tube for guiding each flow path of each injection pipe inner tube as an independent concentric flow path, A swivel for grout injection, characterized in that the injection pipe outer pipe and the swivel outer pipe are screwed together, and the swivel joint and the injection pipe joint are coaxially inserted and removably inserted. Coupling device.