JP3757290B2 - Pipe fitting attachment / detachment operation mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pipe joint attaching / detaching operation mechanism, and an object thereof is to provide a mechanism suitable for smoothly and quickly attaching / detaching a pipe joint using an automatic operation mechanism.
[0002]
[Prior art]
It is indispensable to use a joint to connect a pipe line body for conveying and supplying or discharging a fluid to a device, and it has been used in various ways for a long time. Is based on a technique of assembling or disassembling joints manually using a tool such as a spanner. In particular, since it is common to seal the packing by tightly pressing the packing body and the connection port of the device, manual tightening operation is indispensable in order to tightly seal the packing in this case.
[0003]
[Problems to be solved by the invention]
However, it is necessary to remove and connect repeatedly as described above when the pipe connection device as described above is frequently converted in various constructions, etc., and the work man-hours, tools, A lot of time is required, and the work is interrupted anyway during that time. Therefore, it is naturally preferable to carry out the above-described vehicle removal and connection in as short a time as possible, and there is a great demand for easy and shortening such operations and saving labor.
[0004]
For example, in order to supply water for excavation to a shield machine in shield construction using water, and to drain mud after excavation, it is necessary to connect each pipe. It is extremely complicated to connect and disengage with each other, and at least during that time, the work will be completely interrupted, especially under the conditions that each part mechanism in such equipment is appropriately implemented by remote operation or switching operation in the cab. Is causing serious disadvantages.
[0005]
[Means for Solving the Problems]
The present invention has been repeatedly studied to solve the problems in the prior art as described above, and a packing which is a sealing material and a housing which accommodates the packing have a specific configuration, and a tight seal by the packing is performed by one-touch operation means. The operation is achieved easily, reliably, and instantaneously by tightening as follows.
[0006]
(1) Using an elastic packing having a U-shaped cross section formed to have a larger diameter than the seal outer diameter of the pipe to be applied in the released state, the housing for accommodating the packing is divided into four or more and elastic between the divided end faces. A restraint member for interposing a material, locking one end of the housing to the base tube, and connecting to a piston of an operation cylinder attached to the base tube, and locking to the other end of the housing A pipe joint attaching / detaching operation mechanism characterized in that a slide member to which a pressure sensor is attached is provided, and a pressure receiving portion joined to an inclined surface formed on the inner surface of the slide member is formed on the housing.
[0007]
(2) The base tube body is provided with a first engagement portion that engages with the housing and a second engagement portion that engages with the slide member, and the second member described above is disposed on the slide member or the piston of the operation cylinder. The pipe joint attaching / detaching operation mechanism according to the item (1), wherein a stopper is provided that engages with the engaging portion to limit the operating range of the slide member.
[0008]
(3) The pipe joint attachment / detachment according to any one of (1) and (2) above, wherein a porous elastic material such as a sponge material is inserted into the inner cavity of the U-shaped elastic packing. Operation mechanism.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention as described above will be described with reference to the accompanying drawings. In the present invention, an elastic packing having a U-shaped cross section is used for connecting a pipe line to the above-described equipment. The packing 1 employs a specific one as shown in FIG. 1 in the present invention. In other words, the use of the packing 1 having a U-shaped cross section built in the housing for connecting the pipes to each other has been conventionally used, but the conventional U-shaped packing 1b is shown on the left side of FIG. In contrast, in the present invention, as shown in the middle of FIG. 1, the right side of the tube body 10 is formed with a diameter that is appropriately smaller than the outer diameter of the tube body to be connected. The packing 1a formed to have an appropriately larger diameter than the outer diameter 10a of the tube 10 to be applied shown in FIG.
[0010]
That is, in the prior art, the small diameter packing 1b is used in a natural state to expand the diameter and attach and release it, thereby joining and sealing the tube body surface. In the present invention, the diameter is set at a predetermined position without increasing the diameter. Then, the diameter of the housing is reduced and the packing 1 is pressed and sealed to the tube body 10. For this reason, the housing 2 is divided into a plurality of pieces as shown in FIG. 2, and the divided end faces of the divided housings 2a are respectively provided. A receiving portion 11 is formed, and the circular elastic material 3 is interposed between the divided housings. When released, the diameter is expanded as shown in FIG. 2A, and when tightened, the diameter is reduced as shown in FIG. It is a state.
[0011]
With respect to the number of divisions of the housing 2 as described above, the packing 1a is reduced in diameter so as to limit the amount of movement between the state in which the housing 2 is locked to the tubular body and the state in which the tightening is released. The determination is made in consideration of the relationship shown in FIG. 3 (A) and FIG. 3 (B). That is, when the number of divisions is small, as shown in FIG. 3A, both ends 2a 'of the divided housing 2a require a large radial movement in order to release from the locked state with respect to the tube locking portion. In the state of FIG. 3B in which the number of divisions is increased and the width of the divided housing 2a is reduced, the tube body 10 having the same diameter can be retracted and released from the locked state with a small amount of movement. Moreover, when the divided housing 2a slides in the radial direction as described above, the divided housings 2a, 2a are internally provided when the divided housing 2a is reduced in diameter, especially when the number of divided parts is small and the sliding amount is large. It is preferable to increase the number of divisions accordingly.
[0012]
On the other hand, if the number of divisions is increased, the structure becomes complicated and the manufacturing handling becomes complicated. From these relationships, the number of divisions of the divided housing 2a is determined in consideration of the tube diameter to be applied. For example, when the tube outer diameter to be applied is 10 cm, it is preferable to be individual, 15 cm, individual, 20 cm, individual, 30 cm, individual, and 50 cm. .
[0013]
An example of the attaching / detaching operation mechanism for the divided housing 2a having the packing 1a as described above is as shown in FIG. 4, and the base tube body 4 provided as in the apparatus main body as described above has a hydraulic type or the like. The operating cylinder 5 is attached at its mounting seat 13, and a slide member that is slid along the base tube 4 is connected to the piston 15. That is, in the illustrated case, the sliding member is the first slide member 6. And a second slide member 7, and a restraint member 8 is attached to the tip of the second slide member 7.
[0014]
That is, the first slide member 6 is connected to the piston 5 by the attachment means 17 via the stopper 9, and the tip of the stopper 9 faces the second locking portion 42 of the base tubular body 4, and is caused by the piston 5. The first slide member 6 is locked and fixed to the second slide member 7 by the locking member 16, and the second slide member 7 thus attached has an inner surface on the inner surface of the second slide member 7. First and second inclined guide surfaces 7a and 7b are formed, and the joint portions 12 and 12a formed on the back surface of the divided housing 2a as described above are exposed to the inclined guide surfaces 7a and 7b.
[0015]
In addition, the 1st latching | locking part 41 and the 2nd latching | locking part 42 are provided in the outer surface of the base tubular body 4, The 1st latching | locking part 41 engages with the engagement groove | channel 21 of the housing 2a, and the radial direction of the housing 2a The second locking portion 42 faces a locking step 62 formed on the inner surface of the first slide member 6 to limit the retracting position of the slide member 6 by the piston 15, and thus the slide member. 6 and 7 are reciprocally operated within the range of the stopper 9 and the locking step 62, and each split housing 2a is connected to the base tube by the joints 12 and 12a during the reciprocating operation as shown by an arrow in FIG. The body 4 and the connecting tube 10 connected thereto are pushed in and tightened.
[0016]
The restraining member 8 attached to the distal end of the second slide member 7 as described above has an inclined claw 18 formed at the distal end thereof, and faces the distal end of the housing 2a as described above. When the housing 2a is released, the housing 2a is pulled outward in the radial direction, that is, when the housing 2a is not expanded by the restoring force of the circular elastic member 3 and the packing 1a, Acting and forcibly lifting up to ensure release.
[0017]
The operation procedure by the attachment / detachment operation mechanism of the present invention as described above is as shown in FIG. 5, and the connection tube 10 is shown by the arrow in FIG. 5A in the state shown in FIG. 5B, when further inserted from the state of FIG. 5A and joined to the end of the base tube 4, the result is as shown in FIG. 5B, when the operation cylinder 5 operates and the piston 15 extends, the second slide member 7 advances through the first slide member 6 as shown in FIG. 5C. The first inclined guide surface 7a is in contact with the joint portion 12 and the second inclined guide surface 7b is joined to the shoulder portion of each divided housing 2a.
[0018]
When the piston 15 further advances from the state of FIG. 5C as described above, each of the divided housings 2a is placed on the surfaces of the tubular bodies 4 and 10 as shown in FIG. 5D by the guide surfaces 7a and 7b as described above. The two lip portions of the packing 1a are pressed against the ends of the tubular bodies 4 and 10. When the cylinder piston 15 further extends from the state shown in FIG. 5D, the guide surfaces 7a and 7b get over the joints 12a and 12 of each divided housing 2a as shown in FIG. The divided housing 2a and the packing 1a are pressed against both the pipes 4 and 10 by the second slide part 7 to complete the connection by the joint mechanism.
[0019]
The operation for releasing the pipes 4 and 10 connected as described above is as shown in FIG. 6, and when the piston 15 of the cylinder 5 is retracted from the state shown in FIG. 6), the reduction of the guide surfaces 7a and 7b with respect to the joint portions 12 and 12a is released, and the distal end portion of the restraint portion body 8 faces the end corner portion 22 of the housing 2a. As shown in FIG. 6B in which the piston 15 is further pulled from the state, the distal end of the restraining member 8 is engaged with the end corner portion 22.
[0020]
When the piston 15 is further retracted from the state of FIG. 6B and pushes up the end corner portion 22 of the divided housing 2a, the restoring action of the packing 1 and the circular elastic member 3 in the housing is as shown in FIG. Then, the housing 2a is detached, and then the limit of the cylinder 5 is reached as shown in FIG. In the state of FIG. 6D, the connecting tube 10 can be extracted without any resistance or restraint, and is extracted as shown in FIG.
[0021]
That is, it is clear that such an attaching / detaching operation mechanism can be connected one-touch by an operation such as a momentary valve or switch, and can be released by remote operation. It is also clear that operation or work can be automated.
[0022]
FIG. 7 shows the relationship of pipe connection operation in shield construction using the above-described attachment / detachment operation mechanism of the present invention. That is, in the shield construction for excavating and promoting the soil layer, it is necessary to supply water to the shield machine that is the main body and to discharge the mud, and the piping 30 for them is led to the shield mechanism 31 and the shield mechanism 31 is excavated Accordingly, the piping 30 needs to be extended, and the piping 30b such as a hose for the shield mechanism 31 is led to the connection mechanism 33 portion via the hose reel 32.
[0023]
The operation is to release the detachable joint 28 as shown in FIG. 7 (A), and in this released state, the connection mechanism 33 is moved as shown in FIG. 7 (B), and then a new pipe 30a as shown in FIG. Then, the new pipe 30a is connected to the existing pipe 30 as shown in FIG. In addition, the joint portion of the pipe drawn from the hose reel 32 is connected to a new pipe 30a as shown in FIG. 9E, and then the shield mechanism 31 is advanced as shown in FIG. It is clear that the pipe connection can be made as quickly as within a few seconds when the attachment / detachment operation mechanism according to the present invention which can be connected to each other is used.
[0024]
FIG. 8 shows a case where the attachment / detachment operation mechanism according to the present invention is used in a mechanical device 36 that travels on a track and requires a fluid such as cooling water. However, the mechanical device 36 is simply moved along the track 35. A quick connection or release can be made by simply entering or exiting after the release operation as shown in FIG. 6 (E).
[0025]
4 to 6 according to the present invention is formed such that an engagement groove 24 is formed in the connection tube body 10, and the protrusion 14 of the divided housing 2a is engaged with the engagement groove 24 to form a connection state. However, such a connection replaces the engagement groove 24, and an engagement ring is provided on the peripheral surface of the connection tube 10 or is attached to the end of the connection tube by welding or the like. Or it can employ | adopt similarly with respect to a headless tube type thing.
[0026]
Further, in the case where the present invention is applied to the mud 8 (water) pipe in the sealing mechanism as shown in FIG. 7 described above, foreign matter such as mud is deposited and deposited in the inner cavity of the U-shaped packing 1 in the cross section. In the case where there is a possibility that the instantaneous connection or disconnection operation may be hindered, it is assumed that a porous elastic material 27 such as sponge rubber is attached to the inner cavity 26 of the packing 1 as shown in FIGS. It is preferable to do. That is, such a porous elastic material 27 can effectively prevent the foreign matter from entering and accumulating in the lumen 26 and smoothly perform the instantaneous attachment / detachment operation as described above.
[0027]
As described above, according to the present invention, the connecting pipe body enters or leaves without resistance in the released state by using an elastic packing having a U-shaped cross section formed to have a larger diameter than the seal outer diameter of the pipe to be applied in the released state. It is possible to make a quick and easy detachment operation.
[0028]
The housing that accommodates the packing having a larger diameter than the seal outer diameter of the applicable pipe in the released state as described above is divided into four or more, and an elastic material is interposed between the divided end surfaces, thereby making the housing a packing. The diameter is integrated and expanded to facilitate the loading and unloading of the pipe, and the diameter of the pipe is reduced to provide a connected seal state.
One end of the housing divided as described above is locked to the base tube, and is connected to the piston of the operating cylinder attached to the base tube, and is also locked to the other end of the housing. A slide member attached with a cylinder is provided, and a pressure receiving portion joined to the inclined surface formed on the inner surface of the slide member is formed on the above-described housing, so that a smooth and accurate attachment / detachment operation is performed as in a remote operation using an operation cylinder. Close.
[0030]
The base tube body is provided with a first engagement portion that engages with the housing and a second engagement portion that engages with the slide member, and the second engagement portion described above on the slide member or the piston of the operation cylinder. By providing a stopper that restricts the operating range of the slide member by engaging with the operation cylinder, the operation by the operation cylinder is appropriately performed using the base tube as described above.
[0031]
By inserting a porous elastic material such as sponge material into the inner cavity of the elastic packing having a U-shaped cross section, the instantaneous attachment / detachment operation as described above can be accurately achieved even in a pipeline system for fluid mixed with earth and sand. .
[0032]
【The invention's effect】
According to the present invention as described above, it is possible to appropriately connect or remove piping instantaneously and one-touch, and since an operation cylinder such as a hydraulic cylinder is used, an operator can connect. There is no need to perform manual work close to the part, and it has the effect of enabling remote operation and enabling automation of driving and enabling effective and efficient work. It is a big invention.
In addition, according to the present invention, an operating cylinder in the mechanism as described above is attached using a base tube provided in an apparatus and the like, and the attaching / detaching operation is appropriately performed, or even under conditions where foreign matter such as earth and sand flows. Since the above-described one-touch attachment / detachment operation can be performed constantly and accurately, it is an invention with a large industrial effect in these respects.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a relationship between a packing according to the present invention and a pipe outer surface (seal surface) to be connected to a packing according to the prior art.
FIG. 2 is an explanatory diagram showing the operational relationship of a divided housing according to the present invention.
FIG. 3 is an explanatory view showing the engagement / disengagement relationship between an applied pipe outer surface and a divided housing in comparison with the relationship between the number of divided housings.
FIG. 4 is a partially cutaway side view showing a state in which the attachment / detachment operation mechanism according to the present invention is applied to piping.
FIG. 5 is an explanatory diagram showing a step-by-step process of completing pipe insertion or joint connection according to the present invention.
FIG. 6 is an explanatory view showing stepwise a joint releasing operation process according to the present invention.
FIG. 7 is an explanatory view showing stepwise the operation process when the present invention is used for the supply and drainage of the shield machine in the shield work and used for the operation of extending the pipe according to the excavation propulsion.
FIG. 8 is an explanatory diagram of connection and release operations when the apparatus according to the present invention is employed in a track traveling machine.
FIG. 9 is a cross-sectional view of the present invention in which foreign matter adherence and deposition are avoided in the packing lumen.
FIG. 10 is a partial side view of what FIG. 9 shows.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cross section U-shaped packing 1a Packing 1b of this invention Packing 2b of a prior art 2 Housing 2a Divided housing 3 Circular elastic material 4 Base tube 5 Operation cylinder 6 1st slide member 7 2nd slide member 7a The 1st inclination guide surface 7b The 2nd inclination guide surface 8 Holding part body 9 Stopper 10 Connecting pipe body 11 Receiving part 12 Joining part 12a Joining part 13 Mounting seat 14 Protrusion part 15 Piston (operation cylinder (5))
16 Locking member 17 Mounting means 18 Inclined claw portion 21 Engaging groove 22 End corner portion 24 Engaging groove 26 Housing lumen 27 Porous elastic material 28 Removable joint 30 Existing piping 30a New tube 31 Shield mechanism 32 Hose reel 35 Track 36 machinery

Claims (3)

Using an elastic packing having a U-shaped cross section formed to have a larger diameter than the seal outer diameter of the pipe to be applied in the released state, the housing for accommodating the packing is divided into four or more and elastic materials are respectively provided between the divided end faces. Interposing, locking one end of these housings to the base tube, connecting to the piston of the operating cylinder attached to the base tube, and attaching a restraining part that locks to the other end of the housing A pipe joint attaching / detaching operation mechanism characterized in that a slide member is provided, and a pressure receiving portion joined to an inclined surface formed on an inner surface of the slide member is formed on the housing. The base tube body is provided with a first engagement portion that engages with the housing and a second engagement portion that engages with the slide member, and the second engagement portion described above on the slide member or the piston of the operation cylinder. The pipe joint attaching / detaching operation mechanism according to claim 1, further comprising a stopper that restricts the operating range of the slide member by engaging with the sliding joint. The pipe joint attaching / detaching operation mechanism according to any one of claims 1 and 2, wherein a porous elastic material such as a sponge material is inserted into an inner cavity of the elastic packing having a U-shaped cross section.

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