JP2013170641A - Fluid pipe branching device and method of branching fluid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid pipe branching device which prevents various parts from being concentrated at only a working pipe part side, makes it unnecessary to open and close a branched fluid at a branch hole of which positional accuracy is required, and enables a branch pipe to be easily connected to the branch pipe part with an opening/closing valve of the branch pipe part closed, and to provide a method of branching a fluid.SOLUTION: A fluid pipe 1 is fitted externally by a case body 3 in a sealed state with at least a partially required space S formed between the case body and the outer circumferential surface of the fluid pipe. The case body 3 includes a working pipe part 15, which is communicated with the required space S to drill a branch hole 13 in the fluid pipe 1, and a branch pipe part 11 provided with an opening/closing valve 9. In the working pipe part 15, a prevention means 19 is disposed that prevents a fluid from flowing outside out of a working opening.

Description

  The present invention relates to a fluid pipe branching device for branching a fluid flowing in a fluid pipe in a direction different from the predetermined direction in an uninterrupted flow state through a branch hole formed by drilling from the fluid pipe in a predetermined direction. The present invention relates to a fluid branching method.

  A fluid pipe branching device and a fluid branch for branching a fluid flowing in the fluid pipe in a direction different from the predetermined direction in an uninterrupted state through a branch hole formed by drilling from a predetermined direction of a conventional fluid pipe As a method, a case body provided with a branch pipe part and a work pipe part is fitted in a sealed manner to the fluid pipe in a state where a required space is partially formed on the outer peripheral surface of the fluid pipe, and the cutter is inserted through the work pipe part. After inserting and drilling a branch hole at the top of the fluid pipe, the valve body for opening and closing the branch hole is inserted again through the work pipe section, and the branch pipe section is closed with the required There is one in which a branch passage is obtained by maintaining a valve body in an open state after connecting a branch pipe. (For example, refer to Patent Document 1).

Japanese Patent No. 3752321 (page 3, FIG. 6)

  However, in Patent Literature 1, a branch hole is drilled into the fluid pipe through the work pipe portion, and a valve element is opened and closed with respect to the branch hole. Various components are concentrated on the work pipe portion side. Not only does the structure become too complicated, but the fluid is shut off and opened to the branch pipe with the valve body that opens and closes the branch hole drilled in the fluid pipe. There was also a problem that was required.

  The present invention has been made paying attention to such a problem, and prevents various parts from concentrating only on the side of the work tube, and further, a branch hole that requires dimensional accuracy and position accuracy to open and close the branch fluid. It is an object of the present invention to provide a fluid pipe branching device and a fluid branching method that can be easily performed by connecting the branch pipe to the branch pipe section by closing the on-off valve of the branch pipe section. And

In order to solve the above problems, a fluid pipe branching device of the present invention is
A fluid pipe branching device for branching a fluid flowing in the fluid pipe through a branch hole formed by drilling from a predetermined direction of the fluid pipe in a non-continuous flow state in a direction different from the predetermined direction,
The fluid pipe is externally fitted in a sealed manner in a state where at least a part of the required space is formed between the fluid pipe and the outer peripheral surface of the fluid pipe, and the case body is provided with the branch hole. A working pipe section, and a branch pipe section provided with an on-off valve communicating with the working pipe section through the required space, and preventing a flow of fluid flowing out from the working opening section to the working pipe section. It is characterized in that a blocking means is arranged.
According to this feature, an on-off valve is provided in the branch pipe part to prevent various parts from concentrating only on the work pipe part side, and the branch flow can be opened and closed with the on-off valve of the work pipe part. There is no need to open or close the branch hole using a valve element that requires high positional accuracy. Further, by disposing the blocking means, it is possible to remove the work valve or the like attached to the work pipe part from the work opening part and obtain a compact fluid pipe branching device.

The fluid pipe branching device of the present invention is
The case body is composed of a plurality of divided bodies, and one of the divided bodies is provided with the working tube portion and the branch tube portion.
According to this feature, since the branch pipe part and the work pipe part are collectively provided in one of the plurality of divided bodies, assembly and removal work can be easily performed.

The fluid pipe branching device of the present invention is
A rust-proof core is fitted in the branch hole.
According to this feature, the rust-proof core can be easily fitted into the branch hole using the work tube portion having the branch hole.

The fluid pipe branching device of the present invention is
The rust-proof core is formed integrally with the blocking means.
According to this feature, the branch hole is fitted with the rust-proof core, and the flow of the fluid flowing out from the work tube portion can be simultaneously blocked by the blocking means, so that installation is not troublesome and various types of attachments to the work tube portion are possible. Parts can be removed efficiently.

The fluid pipe branching device of the present invention is
The on-off valve of the branch pipe section includes a gate valve that can move the fluid flow in the branch pipe section in a closeable manner, and an eccentric rotary valve that guides the movement of the gate valve and closes the gate valve insertion hole after removal of the gate valve It is characterized by comprising.
According to this feature, the movement of the gate valve and the closing of the gate valve insertion hole can be selectively performed by the rotation operation of the eccentric rotary valve, so that the gate valve can be easily moved and the partition attached to the branch pipe portion can be easily operated. A compact fluid pipe branching device can be obtained by removing the valve from the gate valve insertion hole.

The fluid branching method of the present invention comprises:
A fluid branching method for branching a fluid flowing in the fluid pipe in an uninterrupted state in a direction different from the predetermined direction through a branch hole formed by drilling from a predetermined direction of the fluid pipe,
A case body in which a working pipe portion and a branch pipe portion provided with an opening / closing valve communicate with each other through a required space externally fits a fluid pipe in a sealing manner, and then closes the opening / closing valve, via the working pipe portion. A branching hole is drilled in the fluid pipe using the drilling means, and the branch pipe is connected to the branch pipe portion, and thereafter, a blocking means for blocking the flow of the fluid flowing out from the work opening to the outside is disposed in the working pipe portion. The on-off valve is opened to allow the fluid flowing in the fluid pipe to flow to the branch pipe portion side through the branch hole.
According to this feature, the branch pipe part and the work pipe part extend in different directions, and the branch hole is drilled in the fluid pipe using the drilling means through the work pipe part with the on-off valve closed. Since the branch pipe can be connected to the branch pipe portion during the operation, the branch operation of the fluid pipe can be easily and quickly performed. Further, by disposing the blocking means, it is possible to remove the work valve or the like attached to the work pipe part from the work opening part and obtain a compact fluid pipe branching device.

1 is a front sectional view of a fluid pipe branching device in Embodiment 1. FIG. 1 is a side view of a fluid pipe branching device in Embodiment 1. FIG. It is front sectional drawing which shows the state which the cutter before the fluid pipe | tube drilling in Example 1 waits in the upper position of a working valve. FIG. 3 is a front cross-sectional view illustrating a state where a branch hole is formed in the fluid pipe in the first embodiment. It is front sectional drawing which shows the state which covered the rust prevention core in the branch hole in Example 1, installed the placing piece in the work pipe part, obstruct | occluded the on-off valve, and connected the branch pipe to the branch pipe part. It is front sectional drawing of the fluid pipe | tube branch apparatus which shows the state which open | released the on-off valve in Example 1, and constructed | assembled the branch flow path. It is front sectional drawing of the fluid pipe branching apparatus in Example 2. FIG. It is a side view of the fluid pipe branching apparatus in Example 2. (A) is a front view of an insert body in which a rust-proof core and a placing piece in Example 2 are integrated, (b) is a cross sectional view of (c), (c) is a right side view of the insert body, (D) is a cross-sectional view of Rolo in (e), (e) is a cross-sectional view of Hooch in (c), (f) is a cross-sectional view of Haha in (g), and (g) is a cross-sectional view of Nini in (a). FIG. 6 is a front cross-sectional view showing a state where a branch hole is formed in a fluid pipe in Embodiment 2. FIG. It is front sectional drawing which shows the state which attached the cover body to the work opening part of the work pipe part in Example 2 in the sealing form. 6 is a front sectional view of a fluid pipe branching device in Embodiment 3. FIG. It is a side view of the fluid pipe branching device in Example 3. 6 is a front sectional view showing a state where a branch hole is formed in a fluid pipe in Example 3. FIG. It is front sectional drawing which shows the state which attached the cover body to the work opening part of the work pipe part in Example 3 in the sealing form.

  A fluid branching device and a fluid branching method according to the present invention will be described below based on examples.

  A fluid pipe branching apparatus and a fluid branching method according to a first embodiment will be described with reference to FIGS. As shown in FIG. 1, the fluid pipe 1 of the present embodiment is made of, for example, ductile cast iron for waterworks buried in the ground, is formed in a substantially circular shape in cross section, and the inner peripheral surface is not shown in the figure. Covered with body coating or mortar layer. The fluid pipe according to the present invention may be made of metal such as cast iron or steel, or made of vinyl chloride, polyethylene or polyolefin. Furthermore, in the present embodiment, the fluid in the fluid pipe 1 is clean water, but the fluid flowing in the fluid pipe is not necessarily limited to clean water. For example, in addition to industrial water, agricultural water, sewage, etc., gas or gas It may be a gas-liquid mixture of liquid and liquid.

  The fluid pipe 1 is externally fitted by a case body 3 composed of an upper case body 3a and a lower case body 3b, which is a divided body of the present invention, and more specifically, between the case body 3 and the outer peripheral surface of the fluid pipe 1. At least a part of the required space S is formed in a sealed manner. The case body of the present invention may have a divided structure composed of a plurality of three or more divided bodies, or does not have a divided structure, and is continuously formed by a mold, welding, machining, or the like. It does not matter. Further, the material of the case body 3 is made of a metal material such as cast iron. However, various materials can be used as in the case of the fluid pipe described above as long as the material is applied according to the material of the fluid pipe. May be.

  The dividing surface of the upper case body 3a and the lower case body 3b divided into two is inclined at approximately 45 degrees with respect to the vertical plane passing through the tube axis of the fluid pipe 1, both of which are in the required space S via the packing 5. In order to prevent fluid from flowing out, the bolts and nuts 7 are joined in a sealed manner. The upper case body 3a has a work tube portion 15 for drilling the branch hole 13 substantially vertically above the fluid tube 1, and an open / close valve 9 extending in a direction substantially orthogonal to the work tube portion 15. A branch pipe portion 11 having a split specification. The branch pipe part 11 and the work pipe part 15 communicate with the required space S at the inner part.

  The branch pipe portion 11 will be described in more detail. The branch pipe portion 11 includes a receiving port portion 11a extending in a substantially horizontal direction of the case body 3 and an on-off valve 9 inserted and connected to the receiving port portion 11a. And the valve joint 11b, and the receiving port 11a and the valve joint 11b are connected by the connector 4. Moreover, since the sealing ring 8 is interposed in the gap between the inner peripheral surface of the receiving portion 11a and the outer peripheral surface of the valve joint 11b, it can be connected in a sealed manner. In addition, the branch pipe part is not limited to the above-described configuration, and may be, for example, a branch pipe part extended from the case body alone, and the tip shape of the branch pipe part connected to the branch pipe is: For example, a receptacle shape, an insertion shape, or a cut end face shape may be used.

  The on-off valve 9 provided in the branch pipe part 11 can be moved up and down by an operation part 9a provided on the head and extending upward from a valve casing 12 connected in a sealed manner to the branch pipe part 11. This is a gate valve type that opens and closes the fluid flowing in the branch pipe section 11, and is maintained in a normally open state when the branch flow path is formed. On the other hand, the work tube portion 15 is provided with a sealing lid 17 for blocking the flow of fluid flowing out from the work opening portion 15a and a placing piece 19 as blocking means of the present invention. Although the attachment of the sealing lid 17 is not described in detail, the flange 15b of the working tube portion 15 is flange-joined via a sealing member.

  The placing piece 19 is installed on the inner peripheral surface of the working tube portion 15 via a packing 19a in order to prevent the flow of fluid from the required space S to the working opening 15a, and is branched by a sealing action by the packing 19a. The working valve 21a (see FIG. 3) used at the time of drilling the hole can be removed. The placing piece 19 may be of any known type as long as it can block the flow in the working tube portion 15. Further, the branch hole 13 is covered with a rust prevention core 14 having a rust prevention member 14a on the outer peripheral portion in order to prevent corrosion of the piercing portion drilled by the cutter 23 (see FIG. 3) which is the drilling means of the present invention. It is fitted.

  Next, based on FIG. 3 thru | or FIG. 6, the process and fluid branching method of assembling the fluid pipe branching apparatus of Example 1 in a non-discontinuous flow state are demonstrated. As shown in FIG. 3, a work valve case body 21 having a work valve 21 a is provided above the upper case body 3 a, and a cutter 23 is disposed above the work valve case body 21 via a flange short pipe 30. The operation shaft sliding guide case body 25 is connected in a sealed manner, the work valve 21a opens the flow path in the work valve case body 21, and the cutter 23 stands by at a position above the work valve 21a. The on-off valve 9 of the branch pipe part 11 closes the flow path in the branch pipe part 11.

  As shown in FIG. 4 from the cutter standby state of FIG. 3, the working valve 21a is fully opened, the cutter 23 is lowered toward the top of the fluid pipe 1, and the top of the fluid pipe 1 is cut to form the branch hole 13. To do. At this time, since the on-off valve 9 of the branch pipe portion 11 is maintained in the closed state, the fluid ejected from the fluid pipe 1 to the required space S through the branch hole 13 does not flow downstream from the on-off valve 9. Further, by opening the drain 26 provided in the operation shaft sliding guide case body 25, chips generated when the branch holes 13 are drilled are multiplied by the fluid ejected into the required space S and discharged to the outside.

  After the branch hole 13 is formed in the fluid pipe 1, as shown in FIG. 5 using a core insertion machine (not shown) instead of the cutter while the on-off valve 9 of the branch pipe portion 11 is kept closed. A cylindrical rust-proof core 14 is fitted and fitted in the branch hole 13 so as not to be detached, and a placing piece insertion machine (not shown) is used instead of the core insertion machine to place the placing piece 19 on the work tube portion 15. Further, a predetermined number of presser bolts 20 (see FIG. 3) provided in the circumferential direction of the work tube portion 15 are screwed in the inner diameter direction so as to contact the upper surface of the placement piece 19, so that the placement piece 19 is applied. The placing piece 19 is held against the fluid pressure. Thereafter, the work valve case body 21 provided with the work valve 21a, the flange short pipe 30, and the operating shaft sliding guide case body 25 are removed from the upper case body 3a, and the sealing lid 17 is hermetically joined to the flange 15b of the work pipe portion 15. . A branch pipe 27 is inserted and coupled in a sealed manner to the end of the branch pipe portion 11 facing the upper case body 3a.

  Finally, if the on-off valve 9 is slid upward as shown in FIG. 6 to open it, a part of the fluid flowing through the flow path of the fluid pipe 1 is fitted in the branch hole 13. From the inside of the cylinder 14, it can flow toward the branch pipe 27 connected to the branch pipe portion 11 branched in the substantially horizontal direction of the fluid pipe through the required space S, and a flow path is secured. In addition, since the on-off valve 9 is configured in the branch pipe portion 11 as described above, for example, after the branch pipe 27 is installed, the flow path of the branch pipe portion 11 is temporarily blocked by the on-off valve 9, and the branch pipe 27 The degree of freedom of pipe laying is increased, such as disposing another piping member or valve body or a lid member at the connection end of the valve joint 11 from which is removed.

  In the fluid pipe branching apparatus according to the first embodiment, the case body 3 has a working pipe portion 15 extending substantially upward in the vertical direction of the fluid pipe 1 and a substantially perpendicular direction with respect to the working pipe portion 15. Since the branch pipe portion 11 is provided, the approach from above to both pipe portions can be easily performed without interfering with each other. However, even if both pipe portions are not arranged orthogonally, Even if the pipe part 15 does not extend upward in the vertical direction with respect to the fluid pipe 1, if the extending direction of both pipe parts of the work pipe part and the branch pipe part is different, the work pipe part side or branch Various parts can be prevented from concentrating only on the pipe side, and opening and closing of the branch flow is performed by the on-off valve 9 of the branch pipe part 11, so that dimensional accuracy and position accuracy are required as in a conventional branch device. There is no need to open and close the branch hole using a valve body.

  Further, the case body 3 provided with a working pipe portion 15 extending substantially upward in the vertical direction of the fluid pipe 1 and a branch pipe portion 11 extending in a direction substantially orthogonal to the working pipe portion 15 is divided into two vertically. Since the dividing surface is inclined at approximately 45 degrees with respect to the vertical plane passing through the tube axis of the fluid tube, the branch tube portion 11 and the work tube portion 15 can be provided together in the upper case body 3a. Easy assembly and removal work from above.

  When the anticorrosion core 14 is fitted into the branch hole 13, the anticorrosion core 14 can be easily fitted into the branch hole 13 by using the work tube portion 15 provided with the branch hole 13.

  Further, by placing a placing piece 19 for preventing the flow of fluid flowing out from the work opening 15a to the work tube portion 15 from the work opening portion 15a, the case body and work valve attached to the work tube portion 15 are removed from the work opening portion 15a. Thus, a compact fluid pipe branching device can be obtained.

  Further, in the fluid branching method using the fluid pipe branching device in the first embodiment, the branch pipe part 11 and the work pipe part 15 extend in different directions, and the work is performed with the on-off valve 9 closed. Since the branch pipe 27 can be connected to the branch pipe section 11 while the branch hole 13 is drilled in the fluid pipe from the pipe section 15 using the cutter 23, the branch work of the fluid pipe 1 can be easily and quickly performed. Can be done.

  A fluid pipe branching apparatus and a fluid branching method according to the second embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the part which is common in the fluid pipe branching apparatus which concerns on Example 1, and the overlapping description of the same structure is abbreviate | omitted.

  As shown in FIG. 7, the work tube portion 15 has a sealing lid 17 that prevents the flow of fluid flowing out from the work opening portion 15 a, and a rust-proof core portion 31 b fitted in the placing piece portion 31 a and the branch hole 13. Is an integral insertion member 31. Of the case body 3 ′ of the second embodiment that externally fits the fluid pipe 1, there is no space on the lower case body 3 b ′ side, and a required space S ′ is formed only on the upper case body 3 a ′ side. Thereby, the structure of case body 3 'can be made compact. The upper case body 3 a ′ and the lower case body 3 b ′ are joined in a sealed manner by fitting a fitting member 16 having a substantially U-shaped cross-sectional view into both flanges facing each other via the packing 5 in the tube axis direction. Has been. The fitting member 16 is prevented from coming off by screwing the holding bolt 16a into the fitting member 16 and abutting the tip of the bolt against the flange.

  Further, the upper case body 3a 'that forms the required space S' has a sufficiently large flow-down cross-section up to the branch pipe portion 11 ', and can flow the fluid without stagnation. Further, in the valve joint 11b ′ constituting the branch pipe portion 11 ′, a locking ring 18 is fitted to the insertion portion inserted into the receiving portion 11a ′, and this locking ring 18 is connected to the receiving portion 11a. The valve joint 11b ′ is prevented from coming off by being locked between the inner end surface of “′” and the bulging end portion 11c ′ of the valve joint 11b ′.

  Next, the structure of the insertion member 31 will be described with reference to FIGS. 9A to 9G. As shown in FIGS. 9A, 9C, 9E, and 9G, the ceiling portion of the insertion member 31 is closed. 9B, and an opening 32 is formed over an angular range in which the central portion is slightly smaller than the substantially semicircular circumference, as shown in FIGS. 9B, 9D, and 9F. ing. A ring groove 34 for receiving the packing 33 (see FIG. 7) is formed on the placing piece portion 31a side. When the insertion member 31 is installed on the inner surface of the working tube portion 15, the working opening portion is formed from the required space S ′. Block fluid flow to 15a.

  The angle range in which the opening 32 is formed is also set as appropriate according to the size of the required space S ′ from the work tube portion 15 toward the branch tube portion 11 ′. A rust-proof core portion 31b having an inner peripheral portion opened in a ring shape is formed at the lower portion of the insertion member 31, and a rust-proof member 35 (see FIG. 7) is provided on the outer peripheral portion. To prevent corrosion of the drilled surface.

  Next, based on FIG. 10, FIG. 11, the process and fluid branching method of assembling the fluid pipe branching device of Example 2 in an uninterrupted state will be described. Although not particularly shown, the work valve 21a opens the flow path in the work valve case body 21, the cutter 23 stands by at a position above the work valve 21a, and the on-off valve 9 of the branch pipe portion 11 ′ is connected to the branch pipe portion 11 ′. The point that the inner flow path is closed is the same as that of the first embodiment.

  As shown in FIG. 10 from this cutter standby state, the work valve 21a is fully opened, the cutter 23 is lowered toward the top of the fluid pipe 1, the top of the fluid pipe 1 is cut, and the branch hole 13 is formed. At this time, since the on-off valve 9 of the branch pipe portion 11 ′ is maintained in the closed state, the fluid ejected from the fluid pipe 1 through the branch hole 13 to the required space S ′ does not flow downstream from the on-off valve 9. Absent.

  After the branch hole 13 is drilled in the fluid pipe 1, the insertion member 31 is replaced with an inserter insertion machine (not shown) instead of the cutter while the on-off valve 9 of the branch pipe portion 11 'is kept closed. The rust preventive core portion 31b is mounted and fitted in the branch hole 13 so as not to be detached, and the placing piece portion 31a integrated with the rust preventive core portion 31b is disposed in the work tube portion 15. Thereafter, the work valve case body 21 provided with the work valve 21a and the operation shaft sliding guide case body 25 are removed from the upper case body 3a ′ and removed, and the sealing lid 17 is attached to the flange 15b of the work pipe portion 15 as shown in FIG. And a branch pipe (not shown) is inserted and coupled in a sealed manner to the end of the branch pipe portion 11 ′ facing the upper case body 3 a ′.

  Finally, as shown in FIG. 7, when the on-off valve 9 is slid upward to open, a part of the fluid flowing through the flow path of the fluid pipe 1 is passed through the branch hole 13 and the required space S ′. The flow path which can flow toward the branch pipe connected to branch pipe part 11 'branched to 1 of the substantially horizontal direction is ensured.

  Thus, in the fluid pipe branching device according to the second embodiment, the rust prevention core part 31b is integrally formed with the placing piece part 31a that prevents the flow of the fluid flowing out from the work pipe part 15 to the outside. Since the branch hole 13 is fitted in the rust-proof core portion 31b and the flow of the fluid flowing out from the work tube portion 15 can be simultaneously blocked by the placing piece portion 31a, it is attached to the work tube portion 15 without trouble in mounting. Various parts can be removed efficiently.

  A fluid pipe branching apparatus and a fluid branching method according to a third embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the part which is common in the fluid pipe | tube branch apparatus which concerns on Example 1, 2, and the overlapping description of the same structure is abbreviate | omitted.

  As shown in FIG. 12, the work tube portion 15 has a sealing lid 17 that prevents the flow of fluid flowing out from the work opening portion 15 a, and a rust-proof core portion 31 b fitted in the placing piece portion 31 a and the branch hole 13. Is an integral insertion member 31. In the case body 53 of the third embodiment in which the fluid pipe 1 is externally fitted, the lower case body 53b side has no required space, and the required space S ′ is formed only on the upper case body 53a side. 2 is the same configuration. Further, the branch pipe portion 51 of the third embodiment is formed integrally with the upper case body 53a, and is configured such that an on-off body 40 as an on-off valve of the present invention described later can be disposed.

  As shown in FIG. 14, the opening / closing body 40 provided on the branch pipe portion 51 side is composed of an eccentric rotary valve 41 and a gate valve 43. The state shown in FIG. The branching device is configured compactly.

  Next, a process of assembling the fluid pipe branching device according to the third embodiment in a continuous flow state and a fluid branching method will be described with reference to FIGS. Although not particularly illustrated, the work valve 21a opens the flow path in the work valve case body 21, the cutter 23 stands by at a position above the work valve 21a, and the gate valve 43 of the opening / closing body 40 of the branch pipe portion 51 is connected to the branch pipe. The flow path in the part 51 is opened. The gate valve 43 closes the flow path of the branch pipe portion 51 by an operation rod 47 disposed in a gate valve operation case body 45 provided in a sealed manner with the upper portion of the branch pipe portion 51. The flow path in the branch pipe part 51 can be opened and closed by the operation part 47a of the operation rod 47 extending to the outside of the case body 45.

  When the gate valve 43 is in a state of closing the flow path in the branch pipe part 51, the eccentric rotary valve 41 has a gate valve insertion hole provided in the connection part between the branch pipe part 51 and the gate valve operation case body 45. The communication openings 51a and 47b constituting the valve are in communication with each other, permitting opening / closing movement of the gate valve 43, and the gate valve 43 is slidably guided by the guide portion 41a of the eccentric rotary valve 41 during the opening / closing operation. In the eccentric rotary valve 41, the central axis of the cylindrical rod body capable of closing the communication opening 51a and the rotational central axis of the operation portion 41b (see FIG. 13) for rotationally driving the cylindrical rod body are eccentric, and the operation portion 41b With this rotation, the cylindrical rod body is configured to be largely separated from the communication opening 51a without closing the communication opening 51a or moving eccentrically and damaging the seal portion provided on the cylindrical rod body.

  As shown in FIG. 14 from this cutter standby state, the work valve 21a is fully opened, the cutter 23 is lowered toward the top of the fluid pipe 1, the top of the fluid pipe 1 is cut, and the branch hole 13 is formed. At this time, since the gate valve 43 of the branch pipe portion 51 is maintained in the closed state, the fluid ejected from the fluid pipe 1 to the required space S ′ via the branch hole 13 does not flow downstream from the gate valve 43. .

  After the branch hole 13 is drilled in the fluid pipe 1, the insertion member 31 of the insertion member 31 is replaced with an inserter insertion machine (not shown) instead of the cutter while the gate valve 43 of the branch pipe portion 51 is kept closed. The rust-proof core portion 31 b is mounted and fitted in the branch hole 13 so as not to be detached, and the placing piece portion 31 a integrated with the rust-proof core portion 31 b is disposed in the work tube portion 15. Thereafter, the work valve case body 21 provided with the work valve 21a and the operation shaft sliding guide case body 25 are removed from the upper case body 53a and removed, and the sealing lid 17 is connected to the flange 15b of the work pipe portion 15 as shown in FIG. The work opening 15a of the work tube portion 15 is sealed by sealing.

  Finally, as shown in FIG. 12, the gate valve 43 is moved upward until it is accommodated in the gate valve operation case body 45 to open the branch pipe portion 15 and flow toward the branch pipe connected to the branch pipe portion 51. The flow path is secured, and the eccentric rotary valve 41 is rotated from the outside to close the communication opening 51a of the branch pipe portion 51. And if the communication opening 51a is obstruct | occluded, the gate valve 43 and the gate valve operation case body 45 will be removed, and the communication opening 51a will be airtightly obstruct | occluded with the sealing lid 49 for branch pipe parts.

  As described above, in the fluid pipe branching apparatus according to the third embodiment, the movement of the gate valve 43 can be selectively guided by the rotational operation of the eccentric rotary valve 41 and the gate valve insertion hole can be opened and closed. The operation is easy, and a compact fluid pipe branching device is obtained by removing the gate valve 43 and the gate valve operation case body 45 attached to the branch pipe portion by closing the gate valve insertion hole with the eccentric rotary valve 41. Can do.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the example in which the angle of the division surface of the case body is limited to approximately 45 degrees or the number of case bodies is divided into two has been described, but the angle and the number of divisions of the division surface are limited to this. However, it is appropriately selected depending on the application environment of the fluid pipe branching device, the material and size of the parts, and the like. Further, the planar cross-sectional shape of the branch hole formed in the fluid pipe is not limited to a circle or an ellipse, but may be a rectangular shape, and is appropriately selected in consideration of the type of cutter to be used, a required branch flow rate, and the like. Accordingly, it goes without saying that the rust-proof core is manufactured in accordance with the formed branch hole.

1 Fluid pipe 3 Case body 3a, 3a ', 53a Upper case body (divided body)
3b, 3b ', 53b Lower case body (divided body)
9 On-off valve
11, 11 ', 51 Branch pipe part 13 Branch hole
14 Rust prevention core 15 Work pipe part 19 Place piece (blocking means)
20 Presser bolt 23 Cutter (piercing means)
27 Branch pipe 31 Insertion member 31a Place piece 31b Rust prevention core 40 Opening / closing body (open / close valve)
41 Eccentric rotary valve 43 Gate valve S, S 'Required space

Claims (6)

A fluid pipe branching device for branching a fluid flowing in the fluid pipe through a branch hole formed by drilling from a predetermined direction of the fluid pipe in a non-continuous flow state in a direction different from the predetermined direction,
The fluid pipe is externally fitted in a sealed manner in a state where at least a part of the required space is formed between the fluid pipe and the outer peripheral surface of the fluid pipe, and the case body is provided with the branch hole. A working pipe section, and a branch pipe section provided with an on-off valve communicating with the working pipe section through the required space, and preventing a flow of fluid flowing out from the working opening section to the working pipe section. The fluid pipe branching device is characterized in that a blocking means is disposed.   The fluid pipe branching device according to claim 1, wherein the case body includes a plurality of divided bodies, and the working pipe section and the branch pipe section are provided in one of the divided bodies.   The fluid pipe branching device according to claim 1 or 2, wherein a rust-proof core is fitted in the branch hole.   The fluid pipe branching device according to claim 3, wherein the rust-proof core is formed integrally with the blocking means.   The on-off valve of the branch pipe section includes a gate valve capable of moving the fluid flow in the branch pipe section so as to be closed, and an eccentric rotary valve that guides the movement of the gate valve and closes the gate valve insertion hole after removal of the gate valve The fluid pipe branching device according to any one of claims 1 to 4, wherein the fluid pipe branching device is configured as follows. A fluid branching method for branching a fluid flowing in the fluid pipe in an uninterrupted state in a direction different from the predetermined direction through a branch hole formed by drilling from a predetermined direction of the fluid pipe,
A case body in which a working pipe portion and a branch pipe portion provided with an opening / closing valve communicate with each other through a required space externally fits a fluid pipe in a sealing manner, and then closes the opening / closing valve, via the working pipe portion. A branching hole is drilled in the fluid pipe using the drilling means, and the branch pipe is connected to the branch pipe portion, and thereafter, a blocking means for blocking the flow of the fluid flowing out from the work opening to the outside is disposed in the working pipe portion. The fluid branching method is characterized in that the on-off valve is opened so that the fluid flowing in the fluid pipe flows through the branch hole to the branch pipe part side.

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