JP5199778B2 - Flow path blocking device and on-off valve updating method for fluid piping system - Google Patents

Description

  The present invention, for example, in a fluid piping system in which a fluid device such as an air valve or a fire hydrant is attached to a branch pipe portion of a fluid pipe such as a water pipe via an on-off valve, has reached the end of its service life or has a leak or failure. The present invention relates to a flow path cutoff device and a method for updating an on-off valve in a fluid piping system, which are used when an on-off valve that has occurred is updated.

  In the conventional flow path blocking device, as shown in Patent Document 1, a cylindrical outer operation shaft that can be inserted into the branch pipe portion through an on-off valve connected to the branch pipe portion of the fluid pipe, and an axial core with respect to this In the branch pipe portion by the first pulling movement of the inner operation shaft with respect to the outer operation shaft to one end side portion (inner end side portion entering the branch pipe portion) with the inner operation shaft slidably inserted in the direction The retaining locking means that can be switched to a position that can be engaged with the position on the upper side in the branch axis direction with respect to the flow path blocking position, and the second pull-out movement of the inner operation shaft with respect to the outer operation shaft, There is provided a channel blocking means that can be switched to a state of blocking the channel.

  To constitute the flow path blocking means, a first pressing member having a pressing surface is fixed to one end portion of the outer operation shaft, and the first pressing member is pressed to one end portion of the inner operation shaft. A second pressing member having a pressing surface facing the surface in the operation axis direction is externally fitted to be slidable in the operation axis direction, and is relatively slid from the second pressing member to the first pressing member. The mounting cylinder portion that is integrally extended in a freely fitted state is provided with a flow-blocking elasticity that is elastically deformed radially outward as the pressing surfaces of the two pressing members move relative to each other. A screw member that contacts the second pressing member at the end of the first pulling movement of the retaining locking means is attached to the screw shaft portion formed on the one end side of the inner operation shaft. It is screwed.

  When the second pressing member is moved closer to the first pressing member by the pressing action of the screw member along with the second pulling movement of the inner operating shaft with respect to the outer operating shaft, the pressing surfaces of both pressing members The elastic annular body is compressed between them and bulges outward in the radial direction, and the flow path of the branch pipe portion is blocked.

  In order to constitute the retaining means, the first cylindrical movement of the inner operating shaft with respect to the outer operating shaft and the mounting cylinder slidable in the operating shaft core direction on the screw shaft portion of the inner operating shaft. At the same time, a screw member that presses and moves the mounting cylinder toward the second pressing member is attached, and the first operating movement of the inner operation shaft relative to the outer operation shaft is performed across the mounting cylinder and the second pressing member. A pair of locking links are attached so as to project radially outward and swing.

  Then, the pivot connecting portion projecting radially outward of the both locking links engages with the upper side portion in the branch axis direction with respect to the flow path blocking position in the branch pipe section by the flow path blocking means. Accordingly, the flow path blocking means is configured to be retained and held at a predetermined flow path blocking position against the fluid pressure.

  Each of the outer operating shaft and the inner operating shaft is a work case attached to the on-off valve in a state where the elastic annular body of the flow path blocking means is located on the fluid pipe side with respect to the flow path blocking setting position in the branch pipe section. It is composed of an operating shaft which is handled as a substantially single shaft having a length protruding outward.

Japanese Patent Laid-Open No. 2005-133877

  In the conventional flow path breaker, each of the outer operation shaft and the inner operation shaft is slidably supported through the ceiling wall portion of the work case, and the retaining and locking means and the flow are fixed in the work case. Since the outer operating shaft and the inner operating shaft project greatly outward from the ceiling wall of the working case, the outer operating shaft and the inner operating shaft are greatly extended outward from the ceiling wall of the working case. It is necessary to secure a work space. Therefore, when such a large work space cannot be secured, the on-off valve renewal method using the flow path shut-off device cannot be employed, and the flow path shut-off is large and heavy. Since the entire apparatus is handled as one, a great amount of labor is required and workability is reduced.

  The present invention has been made in view of the above situation, and the first main problem is that even under construction conditions in which a large working space cannot be secured on the outer side of the working case. It is possible to adopt an on-off valve renewal method using a road shut-off device, to reduce labor and improve workability, and to improve operability with rational improvements utilizing the configuration for that purpose. The improvement is to provide a flow path blocking device that can be improved at the same time, and the second main problem is that even under construction conditions in which a large working space cannot be secured on the outer side of the working case. In addition, the present invention is to provide a method for renewing an on-off valve for a fluid piping system that can adopt an on-off valve renewal method using a flow path shut-off device and can reduce labor and improve workability.

A first characteristic configuration according to the present invention includes a cylindrical outer operation shaft that can be inserted into a branch pipe portion through an on-off valve connected to the branch pipe portion of the fluid pipe and a work case attached thereto, and a shaft relative thereto. At one end of the inner operation shaft that is slidably inserted in the core direction, a flow passage blocking means that is switched to a state in which the flow passage in the branch pipe portion is blocked by a relative movement operation of both operation shafts is provided. A flow path blocking device comprising:
Wherein each of the outer operating shaft and the inner operating shaft is composed of an outer split operation shaft and inner split operation shaft is divided into a plurality in operation the axial direction of the adjacent end of the outer split operation shaft and the inner division operation shaft In each of the adjacent end portions, a connecting portion that is detachably connected from the operation axis direction is formed,
Of the connecting portions that form a pair on the outer divided operation shaft side, the inner peripheral surface of the connecting portion located on the radially inner side is a guide surface that guides the relative movement of the inner divided operation shaft in the axial direction. Of the connecting portions formed on the outer divided operation shaft side and formed on the outer divided operation shaft side, the outer peripheral surface of the connecting portion located on the radially outer side is the operation axis direction applied to the outer divided operation shaft A mounting surface for clamping is provided that can clamp and fix the receiving portion that receives the moving force to
The first inner and outer divided operation shafts provided with the flow path blocking means among the inner and outer divided operation shafts are slidably penetrating through the top plate portion of the work case,
Over the working case and the receiving portion clamped and fixed on the clamping mounting surface on the first outer divided operation shaft side or the receiving portion clamped and fixed on the clamping mounting surface on the outer divided operation shaft side connected thereto The first and second split operation shafts on the inner and outer sides and the inner and outer split operation shafts connected to and connected to the work case are sequentially and forcibly fed in order. .

According to the above characteristic configuration, each of the outer operation shaft and the inner operation shaft that switches the flow passage blocking unit to the flow passage cut-off state is divided into a plurality of outer divided operation shafts and inner divided operations in the operation axis direction. because and a shaft, for example, in order to update the on-off valve which is attached to the branch pipe portion of the fluid conduit, to the on-off valve, attaching the work Goke over scan assembled with the outer operating shaft and the inner operating shaft when, in this work Goke over scan, since the both split operating shaft of the first inner and outer side provided with the flow path blocking means is simply slidably penetrated is, the operation Goke over the scan even under circumstances to store the passage interrupting means, it is possible to reduce greatly the projecting margin of the two half operating shaft of the first inner and outer side projecting to the outside from the acting Goke over scan.

Moreover, through the operation Goke over scan After the both split operating shaft of the first inner and outer set amount just pushing operates on the connecting portion to the both split operating shaft of the first th mediolateral 2 by th connecting replenishing the both split operating shaft of the inner and outer side, the replenishment even during, reducing significantly the projecting margin of the two half operating shaft of the second inner and outer projecting from work Goke over scan outside This can similarly reduce the protrusion margin of both the inner and outer split operation shafts added after the third even when there is a subsequent addition.

  Further, of the connecting parts paired on the outer divided operation shaft side, the inner peripheral surface of the connecting part located on the radially inner side guides the relative movement in the axial direction of the inner divided operation shaft. Since it is formed on the surface, the relative movement operation of both operation shafts can be smoothed.

Thus, for example, in the update work of the opening and closing valve attached to the branch pipe portion of the fluid pipe, it is not possible to secure a large working space to the outside side of the work Goke over scan attached to the on-off valve construction conditions Even so, the channel blocking means provided at one end portion of the two operation shafts can be surely sent to the predetermined channel blocking position in the branch pipe portion, and handling by dividing both the operation shafts It is possible to reduce the labor and improve the workability by promoting the simplification of the connection, and further, using the inner and outer arrangement structure of the connecting portion for that purpose, the connecting portion positioned on the radially inner side can be used. By using the inner peripheral surface as the guide surface of the inner divided operation shaft, it is possible to achieve smooth movement of both operation shafts while simplifying the structure and reducing the manufacturing cost.
In addition, using the highly rigid connecting part structure that connects the outer split operation shafts, the mounting for holding that can hold and fix the receiving part on the outer peripheral surface of the connecting part located on the radially outer side of them By forming the surface, it is possible to reliably receive the moving force in the direction of the operation axis that acts on the receiving portion.

According to a second feature of the present invention, there is provided a cylindrical outer operation shaft that can be inserted into the branch pipe portion through an on-off valve connected to the branch pipe portion of the fluid pipe and a work case attached thereto, and a shaft relative thereto. The first relative movement operation of the two operation shafts to one end of the inner operation shaft that is slidably inserted in the core direction with respect to the upstream portion of the flow path blocking position in the branch pipe section. A flow path provided with a retaining locking means that can be switched to a posture that can be combined, and a flow path blocking means that can be switched to a state where the flow path in the pipe portion is blocked by the second relative movement operation of the two operating shafts. A shut-off device,
Wherein each of the outer operating shaft and the inner operating shaft is composed of an outer split operation shaft and inner split operation shaft is divided into a plurality in operation the axial direction of the adjacent end of the outer split operation shaft and the inner division operation shaft In each of the adjacent end portions, a connecting portion that is detachably connected from the operation axis direction is formed,
Of the connecting portions that form a pair on the outer divided operation shaft side, the inner peripheral surface of the connecting portion located on the radially inner side is a guide surface that guides the relative movement of the inner divided operation shaft in the axial direction. Of the connecting portions formed on the outer divided operation shaft side and formed on the outer divided operation shaft side, the outer peripheral surface of the connecting portion located on the radially outer side is the operation axis direction applied to the outer divided operation shaft A mounting surface for clamping is provided that can clamp and fix the receiving portion that receives the moving force to
The first inner and outer divided operation shafts provided with the flow path blocking means among the inner and outer divided operation shafts are slidably penetrating through the top plate portion of the work case,
Over the working case and the receiving portion clamped and fixed on the clamping mounting surface on the first outer divided operation shaft side or the receiving portion clamped and fixed on the clamping mounting surface on the outer divided operation shaft side connected thereto The first and second split operation shafts on the inner and outer sides and the inner and outer split operation shafts connected to and connected to the work case are sequentially and forcibly fed in order. .

According to the above characteristic configuration, each of the outer operation shaft and the inner operation shaft for switching the retaining locking means and the flow path blocking means to the flow path blocking state is divided into a plurality of outer divisions in the operation axis direction. Since it is composed of an operation shaft and an inner divided operation shaft, for example, in order to update the on-off valve attached to the branch pipe portion of the fluid pipe, the outer operation shaft and the inner operation shaft are assembled to the on-off valve. when mounting the Goke over scan, in this work Goke over scan, the both split operating shaft of the first inner and outer side provided with the retaining locking means and passage interrupting means simply slidably penetrated by since it is, even under conditions of storing the retaining locking means and passage interrupting means to the work Goke over the scan, the first th inner and outer projecting outward from the acting Goke over scan The protrusion margin of both split operation shafts can be greatly reduced.

Moreover, after the two split operation axis of the first inner and outer side only pushed set amount with respect to the operation Goke over scan, via the connection of male and female in both split operating shaft of the first th mediolateral Te by connecting replenishing the both split operating shaft of the second inner and outer side, the replenishment even during, greatly reduces the projected margin of the two half operating shaft of the second inner and outer projecting from work Goke over scan outside This can similarly reduce the protrusion margins of the inner and outer split operation shafts added after the third even when there is a subsequent addition.

  Further, of the connecting parts paired on the outer divided operation shaft side, the inner peripheral surface of the connecting part located on the radially inner side guides the relative movement in the axial direction of the inner divided operation shaft. Since it is formed on the surface, the relative movement operation of both operation shafts can be smoothed.

Thus, for example, in the update work of the opening and closing valve attached to the branch pipe portion of the fluid pipe, it is not possible to secure a large working space to the outside side of the work Goke over scan attached to the on-off valve construction conditions Even so, it is possible to reliably feed the retaining locking means and the flow path blocking means provided at one end portion of the both operation shafts to the predetermined flow path blocking position in the branch pipe portion, Facilitating handling by dividing the shaft, reducing labor and improving workability, and using the internal and external arrangement structure of the connecting part for that purpose, on the radially inner side By using the inner peripheral surface of the connecting portion positioned as the guide surface of the inner divided operation shaft, it is possible to achieve smooth operation of moving both operation shafts while simplifying the structure and reducing the manufacturing cost.
In addition, using the highly rigid connecting part structure that connects the outer split operation shafts, the mounting for holding that can hold and fix the receiving part on the outer peripheral surface of the connecting part located on the radially outer side of them By forming the surface, it is possible to reliably receive the moving force in the direction of the operation axis that acts on the receiving portion.
According to a third characteristic configuration of the present invention, the shaft coupling portion that is fixedly coupled detachably across one end portion of the outer divided operation shaft and one end portion of the inner divided operation shaft that protrudes outside the top plate portion of the work case, The receiving portion and a substantially T-shaped shaft connecting member fixedly connected to the receiving portion and screwed and fixed to the connecting portion of the inner divided operation shaft,
The forcible feeding means is provided over the receiving portion of the shaft connecting portion and the work case.

The fourth characteristic configuration of the present invention is that the sealing material before sealing between coupling surfaces of the coupling portions paired in Kisotogawa division operation shaft side.

According to the above characteristic configuration, each of the outer operation shaft and the inner operation shaft that switches the flow passage blocking unit to the flow passage cut-off state is divided into a plurality of outer divided operation shafts and inner divided operations in the operation axis direction. because and a shaft, for example, in order to update the on-off valve which is attached to the branch pipe portion of the fluid conduit, to the on-off valve, attaching the work Goke over scan assembled with the outer operating shaft and the inner operating shaft when, in this work Goke over scan, since the both split operating shaft of the first inner and outer side provided with the flow path blocking means is simply slidably penetrated is, the operation Goke over the scan even under circumstances to store the passage interrupting means, it is possible to reduce greatly the projecting margin of the two half operating shaft of the first inner and outer side projecting to the outside from the acting Goke over scan.

Moreover, through the operation Goke over scan After the both split operating shaft of the first inner and outer set amount just pushing operates on the connecting portion to the both split operating shaft of the first th mediolateral 2 by th connecting replenishing the both split operating shaft of the inner and outer side, the replenishment even during, reducing significantly the projecting margin of the two half operating shaft of the second inner and outer projecting from work Goke over scan outside This can similarly reduce the protrusion margin of both the inner and outer split operation shafts added after the third even when there is a subsequent addition.

  Further, when the flow path blocking means provided at one end portion of the two operation shafts is sent to a predetermined flow path blocking position in the branch pipe portion, the pressure fluid is temporarily supplied from between the connecting portions connecting the outer divided operation shafts. Even if the liquid enters, the pressure fluid can be prevented from being ejected from the end of the operation shaft that opens to the outside through the annular space between the inner peripheral surface of the outer divided operation shaft and the outer peripheral surface of the inner divided operation shaft. .

Thus, for example, in the update work of the opening and closing valve attached to the branch pipe portion of the fluid pipe, it is not possible to secure a large working space to the outside side of the work Goke over scan attached to the on-off valve construction conditions Even so, the channel blocking means provided at one end portion of the two operation shafts can be reliably fed into the predetermined channel blocking position in the branch pipe section without fluid leakage, and the both operations It is possible to facilitate the handling by dividing the shaft to reduce labor and improve workability.

According to a fifth feature of the present invention, there is provided a cylindrical outer operation shaft that can be inserted into the branch pipe portion through an on-off valve connected to the branch pipe portion of the fluid pipe and a work case attached thereto, and a shaft relative thereto. At one end side of the inner operation shaft that is slidably inserted in the core direction, a flow path blocking means that can be switched to a state in which the flow path in the branch pipe section is blocked by a relative movement operation of both operation shafts is provided. An on-off valve update method for a fluid piping system that updates the on-off valve after shutting off the flow path in the branch pipe section while maintaining fluid transportation in the fluid pipe using a flow path shut-off device,
Constructed from the passage of each of the outer operating shaft and the inner operating shaft of the shut-off device is divided into a plurality in operation the axial direction of the outer split operation shaft and inner split operation axis, adjacent ends of the outer split operation shaft and Each of the adjacent end portions of the inner divided operation shaft is formed with a connection portion that is detachably connected to each other from the operation axis direction,
Of the connecting portions that form a pair on the outer divided operation shaft side, the inner peripheral surface of the connecting portion located on the radially inner side is a guide surface that guides the relative movement of the inner divided operation shaft in the axial direction. Of the connecting portions formed on the outer divided operation shaft side and formed on the outer divided operation shaft side, the outer peripheral surface of the connecting portion located on the radially outer side is the operation axis direction applied to the outer divided operation shaft A mounting surface for clamping is formed to clamp and fix the receiving part that receives the moving force to
Both split operating shaft of the first inner and outer side provided with the flow path blocking means is slidably disposed through the top plate portion of the working casing, forcing the two half operating shaft of the inner and outer side of the working casing The forcible feeding means for feeding into the gripping portion is clamped between the work case and the receiving portion clamped and fixed on the clamping mounting surface on the first outer divided operation shaft side, or on the clamping mounting surface on the outer divided manipulation shaft side connected to and connected thereto while sequentially replaced over the fixed receiver, the forced feeding means operates the first th inner and outer both split operation shaft and two half operating shaft of the inner and outer side coupled replenishment thereto relative to said work casing Are forcibly sent sequentially.

According to the above characteristic configuration, when the channel blocking unit of the channel blocking device is inserted into the channel blocking position in the branch pipe portion of the fluid pipe to block the channel, the channel blocking unit is in the channel blocking state. since each of the outer operating shaft and an inner operating shaft to the switching operation and an outer split operation shaft and inner split operation shaft is divided into a plurality in operation axis direction, it is attached to the branch pipe portion the on-off valve, will be mounted a working case where only the first two half operating shaft of the inner and outer side provided with the flow path blocking means is penetrated slidably, the operation Goke over the scan even under circumstances to store the passage interrupting means, it is possible to reduce greatly the projecting margin of the two half operating shaft of the first inner and outer side projecting to the outside from the acting Goke over scan.

Moreover, after only pushed set amount in the first inner and outer side of the forced feeding means both split operating shaft with respect to the operation Goke over scan, the both split operating shaft of the first th mediolateral 2 by th connecting replenishing the both split operating shaft of the inner and outer side, the replenishment even during, reducing significantly the projecting margin of the two half operating shaft of the second inner and outer projecting from work Goke over scan outside This can similarly reduce the protrusion margin of both the inner and outer split operation shafts added after the third even when there is a subsequent addition.

Accordingly, the updating work of the opening and closing valve attached to the branch pipe portion of the fluid pipe, there at the construction conditions can not be secured a large work space on the outer side of the work Goke over scan attached to the on-off valve However, the channel blocking means provided at one end portion of the two operation shafts can be reliably sent to the predetermined channel blocking position in the branch pipe portion, and easy to handle by dividing the two operation shafts. The inner circumference of the connecting portion located on the radially inner side can be reduced by using the inner and outer arrangement structure of the connecting portion. By using the surface as the guide surface of the inner divided operation shaft, it is possible to achieve smooth movement operation of both operation shafts while simplifying the structure and reducing the manufacturing cost.
In addition, using the highly rigid connecting part structure that connects the outer split operation shafts, the mounting for holding that can hold and fix the receiving part on the outer peripheral surface of the connecting part located on the radially outer side of them By forming the surface, it is possible to reliably receive the moving force in the direction of the operation axis that acts on the receiving portion.

According to a sixth aspect of the present invention, there is provided a cylindrical outer operation shaft that can be inserted into the branch pipe portion through an on-off valve connected to the branch pipe portion of the fluid pipe and a work case attached thereto, and a shaft relative thereto. The first relative movement operation of the two operation shafts on the one end side portion with the inner operation shaft slidably inserted in the core direction with respect to the upstream portion of the flow path blocking position in the branch pipe portion A stop-and-hold locking means that can be switched to an engageable posture, and a flow path blocking means that can be switched to a state where the flow path in the branch pipe section is blocked by the second relative movement operation of the two operation shafts. An on-off valve update method for a fluid piping system that updates the on-off valve after shutting off a flow path in the branch pipe portion while maintaining fluid transportation in the fluid pipe using a path shut-off device,
Constructed from the passage of each of the outer operating shaft and the inner operating shaft of the shut-off device is divided into a plurality in operation the axial direction of the outer split operation shaft and inner split operation axis, adjacent ends of the outer split operation shaft and Each of the adjacent end portions of the inner divided operation shaft is formed with a connection portion that is detachably connected to each other from the operation axis direction,
Of the connecting portions that form a pair on the outer divided operation shaft side, the inner peripheral surface of the connecting portion located on the radially inner side is a guide surface that guides the relative movement of the inner divided operation shaft in the axial direction. Of the connecting portions formed on the outer divided operation shaft side and formed on the outer divided operation shaft side, the outer peripheral surface of the connecting portion located on the radially outer side is the operation axis direction applied to the outer divided operation shaft A mounting surface for clamping is formed to clamp and fix the receiving part that receives the moving force to
Wherein both split operation shaft of the retaining locking means and the first inner and outer side provided with a passage interrupting means slidably disposed through the top plate portion of the working casing, both internal and external side of the working casing Forced feeding means for forcibly feeding the split operation shaft is provided on the outer split operation shaft side connected to the work case and the first mounting portion on the first outer split operation shaft side. The forcible feeding means is operated while sequentially changing over the receiving portion clamped and fixed to the clamping mounting surface, and the first inner and outer divided operation shafts and the first and second split operation shafts are sequentially added and connected to the work case. Both the inner and outer split operation shafts are forcibly sent to a state where the receiving portion clamped and fixed to the clamping mounting surface comes into contact with the top plate portion of the work case .

According to the above characteristic configuration, when the flow path blocking means of the flow path blocking device is inserted into the flow path blocking position in the branch pipe portion of the fluid pipe to block the flow path, the retaining locking means and the flow path blocking Each of the outer operation shaft and the inner operation shaft for switching the means is composed of an outer divided operation shaft and an inner divided operation shaft divided into a plurality in the direction of the operation axis, and is attached to the branch pipe portion. A work case in which only the first inner and outer split operation shafts provided with the retaining locking means and the flow path blocking means are slidably penetratingly installed, even under circumstances to store the retaining locking means and passage interrupting means in the work Goke over scan, the 1st inner and outer projecting outward from the acting Goke over scan of both the divided operating shaft The protrusion margin can be greatly reduced.

Moreover, after only pushed set amount in the first inner and outer side of the forced feeding means both split operating shaft with respect to the operation Goke over scan, the both split operating shaft of the first th mediolateral 2 by th connecting replenishing the both split operating shaft of the inner and outer side, the replenishment even during, reducing significantly the projecting margin of the two half operating shaft of the second inner and outer projecting from work Goke over scan outside This can similarly reduce the protrusion margin of both the inner and outer split operation shafts added after the third even when there is a subsequent addition.

Accordingly, the updating work of the opening and closing valve attached to the branch pipe portion of the fluid pipe, there at the construction conditions can not be secured a large work space on the outer side of the work Goke over scan attached to the on-off valve However, it is possible to reliably feed the retaining locking means and the flow path blocking means provided at one end portion of the both operation shafts to the predetermined flow path blocking position in the branch pipe portion, and Ease of handling by promoting division can be promoted to reduce labor and improve workability . In addition, the inner and outer arrangement structure of the connecting portion is used for this purpose, so that it is positioned on the radially inner side. By using the inner peripheral surface of the connecting portion as the guide surface of the inner divided operation shaft, it is possible to achieve smooth movement operation of both operation shafts while simplifying the structure and reducing the manufacturing cost.
In addition, using the highly rigid connecting part structure that connects the outer split operation shafts, the mounting for holding that can hold and fix the receiving part on the outer peripheral surface of the connecting part located on the radially outer side of them By forming the surface, it is possible to reliably receive the moving force in the direction of the operation axis that acts on the receiving portion.

According to a seventh characteristic configuration of the present invention, the shaft coupling portion that is fixedly coupled detachably over one end portion of the outer divided operation shaft and one end portion of the inner divided operation shaft that protrudes outside the top plate portion of the work case, The receiving portion and a substantially T-shaped shaft connecting member fixedly connected to the receiving portion and screwed and fixed to the connecting portion of the inner divided operation shaft,
The forced feeding means is in a point that is provided over and the receiving portion of the shaft coupling portion and the working case.

With the above construction, by mounting the shaft connecting portion over the one end portion of the one end portion and the inner split operation axis of the outer split operation shaft projecting on the top plate portion outside of the working casing, the relative movement of the two division operation shaft And the retaining means and the flow passage blocking means can be maintained in a predetermined state, and the receiving portion of the shaft connecting portion for maintaining the predetermined state is attached to one side of the forced feeding means. By using it as a member, it is possible to equalize the forced feeding force applied to both split operation shafts penetrating the work case.

[First Embodiment]
As shown in FIG. 1, a connecting flange portion (an example of a connecting portion) of a branch pipe portion 2 formed to protrude radially outward in the middle of a water pipe 1 which is an example of a fluid pipe constituting a fluid piping system. 2c, the upstream (lower side) connecting flange portion (an example of the connecting portion) 3a of the gate valve 3 which is an example of the on-off valve is detachable through a bolt 4A and a nut 4B which are an example of the fastener 4. It is tightened and connected in a state (sealed state), and a downstream side connection flange portion (an example of a connection portion) 3b of the gate valve 3 is connected to a connection flange portion (a connection portion of an air valve 6) which is an example of a fluid device. (Example) In a branch connection structure in which 6a is detachably tightened and connected in a watertight manner via bolts 4A and nuts 4B, which are examples of the fastener 4, water in the water pipe 1 (water supply which is an example of fluid) Water) FIG. 23 shows the reason of leakage or failure due to deterioration or deterioration due to deterioration, for example, the gate valve 3 that has become inoperable in the embodiment and the air valve 6 that has reached the set durability in FIG. A method for updating a gate valve 8 as an example of a selected new on-off valve as shown and an air valve 9 as an example of a selected new fluid device as shown in FIG. 1] to [24].

  The branch pipe section 2 includes a large-diameter first branch pipe section 2A formed integrally with the water pipe 1, a connection flange section 2a of the first branch pipe section 2A, and an upstream connection of the gate valve 3. A throttle shape having connecting flange portions 2b and 2c that are detachably connected to the flange portion 3a via bolts 4A and nuts 4B in a watertight state, and the connecting port portion connected to the gate valve 3 has a small diameter. The second branch pipe portion 2B.

[1] As shown in FIG. 2, both connecting flanges generated by loosening operation of waterproof bolts 4C and nuts 4D on the connecting flange portion 2c of the branch pipe portion 2 and the upstream connecting flange portion 3a of the gate valve 3 are provided. A plate valve type channel shut-off device A equipped with a thin plate-like partition plate valve 11 which can be inserted and moved to a position where the branch channel is shut off through a gap between the parts 2c and 3a is attached. After shutting off the branch flow path P with the partition plate valve 11 of the device A, the air valve 6 is removed from the downstream connection flange portion 3 b of the partition valve 3.

  As shown in FIGS. 3 and 4, the plate-valve type flow shut-off device A seals the outer periphery of the connection flange portion 2 c of the branch pipe portion 2 and the upstream connection flange portion 3 a of the gate valve 3. Branching flow from the flow path opening position through the clearance between the joint surfaces of the connecting flange portions 2c and 3a generated by the loosening operation of the waterproofing bolt 4C and nut 5D, and the blocking work cover A1 that can be detachably attached in the state A thin plate-like partition plate valve 10 that can be inserted and moved to a flow path shut-off position that shuts off the path P is provided as a main component, and a plurality of locations in the circumferential direction of the shut-off work cover A1 (circumferential in this embodiment) At three locations in the direction, clearance forming means A2 that pushes between the joint surfaces of both the connecting flange portions 2c and 3a within the range of the loosening operation allowance of the waterproof bolt 4C and nut 5D is provided.

  As the fastener 4, a plurality of bolts 4 </ b> A and nuts 4 </ b> B of a normal specification (four sets in the embodiment) and a plurality of waterproof specifications (four sets in the embodiment) having an excellent sealing (water stopping) function are used. It consists of bolts 4C and nuts 4D. At the start of replacement work of the gate valve 3 and air valve 6, the normal specification bolts 4A and nuts 4B are replaced with waterproof specification bolts 4C and nuts 4D, and at the end of the replacement work. Replace the waterproof bolt 4C and nut 4D with the normal bolt 4A and nut 4B.

  The blocking work cover A1 includes an annular elastic sealing material 11 provided with a substantially semicircular annular seal portion 11a in cross-sectional view that can be pressed from the radially outer side to the outer peripheral surfaces of the connecting flange portions 2c and 3a. The annular elastic sealing material 11 is composed of a two-part structure fastening ring 12 that fastens and fixes the annular elastic seal material 11 from the outside in the radial direction.

  The annular elastic sealing material 11 has a branch axis direction of both connecting flange portions 2c and 3a when a set maximum clearance is formed between the joint surfaces of both connecting flange portions 2c and 3a so that the partition plate valve 10 can be inserted. Are formed integrally in an annular shape with a width equal to or substantially equal to the outer surface interval at the bottom, and the minimum inner diameter of both seal portions 11a is configured to be slightly smaller than the outer diameter of the outer peripheral surfaces of the connecting flange portions 2c and 3a. ing.

  Further, the annular elastic sealing material 11 is formed with openings 11b that allow the partition plate valve 10 to be inserted and moved, and a part that is located on both sides in the circumferential direction of the opening 11b and a part that is opposed to the opening 11b in the radial direction. Are formed through holes 11c through which the distal ends of the separation bolts 13 constituting the gap forming means A2 penetrate from the radially outer side.

  The tightening ring 12 is fixed to a pair of substantially semicircular arc-shaped tightening split rings 12A having a width larger than the width of the annular elastic seal material 11 in the branch axis direction, and to both ends in the circumferential direction of each tightening split ring 12A. Among the connected pieces 12B, the connecting pieces 12B facing each other in the insertion / extraction direction of the partition plate valve 10 are constituted by bolts 12C and nuts 12D, and the bolts 12C and nuts 12D are tightened with a set torque. In the state in which the relative separation movement due to the water pressure between the branch pipe portion 2 and the gate valve 3 accompanying the loosening operation of the fastener 4 is allowed, both the seal portions 11a of the annular elastic seal material 11 are connected to both the connecting flange portions 2c and 3a. The outer peripheral surface is configured to be sealed and pressed with a set pressing force.

  Further, in one of the clamped divided wheels 12A, a similarity that is slightly larger than the cross-sectional shape of the valve plate 10A of the partition plate valve 10 is provided at a circumferentially central position opposite to the opening 11b of the annular elastic seal material 11 in the radial direction. A slit-shaped opening 12a having a shape and having a function of slidingly guiding the insertion / removal movement of the partition valve 10 is formed to penetrate therethrough, and each through-hole 11c of the annular elastic sealing material 11 in both tightening split rings 12A. At three locations in the circumferential direction opposite to each other in the radial direction, through holes 12b through which the separation bolts 13 constituting the gap forming means A2 penetrate from the radially outer side are formed.

  In addition, one tightening split ring 12A can accommodate most of the valve plate 10A with a part of the semicircular tip edge of the partition plate valve 10 slidably entering the slit-shaped opening 12a. A valve case 15 having a storage space 14 is fixed, and an operation transmission shaft 10B of the partition plate valve 10 is inserted into and removed from the connection flange portion 15A formed at the rear end portion of the valve case 15. A lid body 16 that is slidably guided in a direction is fastened and fixed by bolts 17.

  [2] As shown in FIG. 5, the upstream connection portion of the work on / off valve 19 can be detachably attached to the downstream connection flange portion 3 b of the gate valve 3 via a bolt 4 </ b> A which is an example of the fastener 4. A cleaning device B for tightening and connecting in a watertight state and removing a rust and the like present at a location corresponding to a flow path blocking on the inner peripheral surface of the branch pipe portion 2 is connected to the upstream side connection portion of the work on-off valve 19. The bolt 4A which is an example of the fastener 4 is detachably connected in a watertight state.

  After the work on / off valve 19 is installed or the cleaning device B is installed, the partition plate valve 11 of the plate valve type flow path shutoff device A is opened, and this opened state is flown in step [15]. Maintain until road breaker A is removed.

  The cleaning device B is connected to a top plate portion 20B of a cleaning work case 20 having a connection flange portion 20A that is tightened and connected to a downstream side connection portion of the work on / off valve 19 on the inner peripheral surface of the branch pipe portion 2. The scraping cleaning tool 21 provided with a scraping plate 21B capable of scraping rust and the like at the tip of the operation shaft 21A having a length that can be inserted up to the location corresponding to the flow path blocking is arranged in the direction of the branch axis (up and down The cleaning work case 20 is attached to the cleaning work case 20 so that it can be moved in the direction) and swingable, and the rust and the like scraped by the scraping plate 21B of the scraping cleaning tool 21 are discharged to the outside. The drain valve 22 is connected to a small-diameter drain valve 23 to which a water pressure gauge or the like can be attached when the water stop state of the cleaning work case 20 is inspected.

  Further, a lowering restricting tool 24 for preventing the operation shaft 21A of the scraping cleaning tool 21 from being lowered by its own weight with respect to the top plate portion 20B of the cleaning work case 20 is provided. A pair of holding plates 24A capable of holding and fixing an operation shaft 21A of the cleaning tool 21 or an outer operation shaft 31 of a flow path shut-off device C described later, and a bolt 24B with a hexagon head that fastens and fixes both the holding plates 24A in a holding state. And a bolt 24C with a rotation operation unit.

  In the first embodiment, a large work space cannot be secured on the outer side (upper side) of the cleaning work case 20, in other words, from the upper surface of the work on-off valve 19 to the ceiling wall W of the structure. Since the height H of the working space is limited, the operation shaft 21A of the scraping cleaning tool 21 is divided into a plurality of parts according to the restricted height of the working space.

  In this embodiment, the operation shaft 21A includes a main operation shaft portion 21a provided with a scraping plate 21B, and a length of an operation shaft portion that can be selectively screwed to the main operation shaft portion 21a. The first and second handle shaft portions 21b and 21c are different from each other. In FIG. 5, the main operation shaft portion 21a and the first handle shaft portion 21b are used.

  [3] As shown in FIG. 6 and FIG. 7, it is an example of a jumping-out restricting means for restricting the operation shaft 21A of the scraping cleaning tool 21 from jumping upward due to water pressure. A tightening fixture 25 for holding or tightening the operation shaft 21A of the scraping cleaning tool 21 on the cleaning work case 20 is provided.

  The tightening fixture 25 includes a first hook 25 </ b> A that can be locked to a locking body 26 fixed to the cleaning work case 20, and a second hook that can be locked to the operation shaft 21 </ b> A of the scraping cleaning tool 21. 25B and a lever block including an operation lever 25D that winds up a chain (or wire) 25C that is connected so that the first hook 25A can be pulled out to the tightening side.

  The operation lever 25D of the lever block 25 is wound up to the tightening side to hold the operation shaft 21A of the scraping cleaning tool 21 in the cleaning work case 20, and then the work on-off valve 19 is opened. The first handle shaft portion 21b of the cleaning device B held in position against the water pressure is pushed to the set push position.

  The lever block 25 forcibly feeds one or a plurality of sets of inner and outer divided operation shafts 31A to 31C and inner divided operation shafts 32A to 32C, which are penetrated into a flow path blocking work case 30 described later. The force-feeding means is also used.

  Next, the first handle shaft portion 21b is removed from the main operation shaft portion 21a of the cleaning device B, and instead the second handle shaft portion 21c is screwed and connected, and the second handle shaft portion 21c is set to the set push-in position. The drain valve 22 is opened, the second handle shaft portion 21c is moved up and down and swinged, and the flow of the inner peripheral surface of the branch pipe portion 2 is detected by the scraping plate 21B of the cleaning device B. The rust and the like present at the location corresponding to the road block are scraped off, and the removed rust and the like are discharged together with a part of clean water through the drain valve 22 to a predetermined external location.

  [4] As shown in FIGS. 8 and 9, when the cleaning of the portion corresponding to the flow path blocking on the inner peripheral surface of the branch pipe portion 2 is completed, the downstream connecting portion of the work on-off valve 19 and the cleaning device B are cleaned. The fixed working connection with the working case 20 is released, the cleaning working case 20 is removed from the working on-off valve 19, and the flow in the branch pipe portion 2 is connected to the downstream connecting portion of the working on-off valve 19. The flow path blocking work case 30 of the flow path blocking apparatus C having the following configuration that blocks the branch flow path P at the path blocking setting position is fixedly connected in a watertight state.

  The flow path blocking device C will be described in detail. A bottomed cylindrical flow path blocking work case having a connection flange portion 30a that can be fixedly connected in a watertight manner to the upstream connection portion of the work opening / closing valve 19. A cylindrical outer operation shaft 31 that slidably penetrates the central portion of the top plate portion 30B in a watertight state in the direction of the branch axis, and an inner axis of the outer operation shaft 31. An inner operation shaft 32 that slidably penetrates in the direction (branch axis direction) is provided in a penetrating state, and the branch pipe portion 2 is provided on the inner end (lower end) side of the outer operation shaft 31 and the inner operation shaft 32. A channel blocking means D that can be switched to a state in which the branch channel P is blocked, and a large-diameter pipe wall portion upstream of the channel blocking portion by the channel blocking means D, that is, the second branch tube section. 2B is stretched while being bent in a diameter-enlarging posture that can be engaged with the peripheral edge of the branch channel opening on the inner peripheral surface. A retaining locking means E having a pair of locking links 45 and 46 is provided, and the flow path blocking means D and the retaining locking means E are operated from the outside via both operation shafts 31 and 32. An operating means F is provided.

  The flow path blocking work case 30 includes a first work case part 30A provided with the connection flange part 30a and a second work case part 30B provided with the top plate part 30b, and the first work case. The connecting flange portion 30c integrally formed on the other opening edge of the portion 30A and the connecting flange portion 30d integrally formed on the opening edge of the second work case portion 30B are bolts 4A, which are an example of the fastener 4. The nut 4B is detachably connected in a watertight manner in a detachable manner, and the connection flange portion 30d of the second work case portion 30B can be engaged with the first hook 25A or the second hook 25B of the lever block 25. A locking member 38 is attached.

  As shown in FIG. 9, the flow path blocking means D is formed on the inner end portion (lower end portion) of the outer operation shaft 31 and on the distal end side with a mounting base portion 33A that can be fitted on the inner end portion. A first pressing plate 33 provided with a cylindrical body 33B on which an annular pressing surface 33a is formed is fitted and fixed, and a first pressing plate is provided on the inner end side (lower end side) of the inner operation shaft 32. It is slidable from the axial direction with respect to the pressing plate portion 34A forming an annular pressing surface 34a opposite to the pressing surface 33a of 33 and the hollow portion 33b of the cylindrical body 33B. A second pressing plate 34 having a cylindrical body 34 </ b> B that fits inside is slidably fitted in the direction of the operation axis, and is below the second pressing plate 34 with respect to the inner operation shaft 32 (for work). Stopper nut 35 and lock nut for setting the maximum movement position to the on-off valve 19 side) 6, is screwed to the screw shaft portion 32a formed on the inner end side of the inner operating shaft 32 (lower side).

  The outer diameter of the first pressing plate 33 and the outer diameter of the second pressing plate 34 are taken in and out of the branch pipe portion 2 of the water pipe 1 through the work opening / closing valve 19 and the gate valve 3 from the flow path blocking work case 30. In order to be able to operate, it is formed in the outer diameter smaller than each inner diameter of the branch pipe part 2, the gate valve 3, and the work on-off valve 19.

  Further, the cylindrical portion 34B of the second pressing plate 34 is formed to have an outer diameter smaller than the inner diameter of the working on-off valve 19 in a non-pressurized state (natural state), and both the pressing plates 33, 34. Rubber that shields the flow path between the inner peripheral wall surface by elastically deforming into a diameter-expanded state in close contact with the inner peripheral wall surface of the branch pipe portion 2 by the clamping pressure from the operation axis direction by the pressing surfaces 33a, 34a A diameter-expanding elastic body 37 made of metal is packaged.

  As shown in FIG. 9, the maximum facing distance between the pressing surfaces 33a, 34a of both pressing plates 33, 34 is set across the mounting base portion 33A of the first pressing plate 33 and the pressing plate portion 34A of the second pressing plate 34. An interval regulating bolt 39 and a nut 40 for regulating the facing interval are provided.

  As shown in FIG. 9, the retaining latching means E is configured to lock the downstream side at three locations in the circumferential direction of the upstream end surface (lower end surface) of the pressing plate portion 34 </ b> A of the second pressing plate 34. The ends of the link 45 are pivotally connected so as to be swingable, and at three locations in the circumferential direction of the outer peripheral surface of the mounting cylinder 47 slidably fitted to the screw shaft portion 32a of the inner operation shaft 32. The end of the locking link 46 on the upstream side is pivotally connected so as to be swingable, and further, a stopper nut 48 for restricting and setting the maximum movement position of the mounting cylinder 47 relative to the inner operation shaft 32 to the upstream side. Is screwed into the distal end side of the screw shaft portion 32a of the inner operation shaft 32.

  The pair of locking links 45, 46 are upstream of the shielding portion by the diameter-enlarging elastic body 37 in conjunction with the sliding of the inner operation shaft 32 to the outer end side (upper side) with respect to the outer operation shaft 31. The inner peripheral wall surface of the side, that is, the inner peripheral surface of the second branch pipe portion 2B is configured to protrude while being bent into a diameter-enlarging posture that can be engaged with the peripheral edge of the branch flow channel opening.

  Each of the outer operation shaft 31 and the inner operation shaft 32 is limited in the height H of the work space from the upper surface of the work on-off valve 19 to the ceiling wall W of the structure, as shown in FIGS. Therefore, the outer divided operation shafts 31A to 31C and the inner divided operation shafts 32A to 32C are divided into a plurality of portions in the operation axis direction corresponding to the restricted height H of the work space.

  In this embodiment, the outer operation shaft 31 includes a first outer divided operation shaft 31A connected to the first pressing plate 33, and a male / male connection portion with respect to the upper end portion of the first outer divided operation shaft 31A. The second outer divided operation shaft 31B is fixedly connected to the operation axis from the direction of the operation axis through 50 and 51, and the upper end portion of the second outer divided operation shaft 31B is connected via the male and male connection portions 50 and 51. The third outer divided operation shaft 31C is fixedly connected in a detachable manner from the operation axis direction and is divided into three parts.

  Similarly to the outer operation shaft 31, the inner operation shaft 32 also includes a first inner divided operation shaft 32A coupled to the retaining locking means E and the second pressing plate 34, and the first inner divided operation shaft 32A. A second inner divided operation shaft 32B that is fixedly connected to the upper end portion of the second inner divided operation shaft 52B through a male and female coupling portions 52, 53, and an upper end portion of the second inner divided operation shaft 32B. The third inner divided operating shaft 32C is fixedly connected to the male and female connecting portions 52 and 53 so as to be detachable from the operating axis direction.

  Of the male and female connecting portions 50 and 51 formed at the adjacent ends of the outer split operation shafts 31A to 31C, they are fixed to the upper end portion of the first outer split operation shaft 31A and the upper end portion of the second outer split operation shaft 31B. The female-side connecting portion 50 is composed of a cylindrical screw member having a female screw formed on the inner peripheral surface, and a lower end portion of the second outer divided operation shaft 31B and a third outer divided operation shaft. The male connecting portion 51 fixed to or integrally formed with the lower end of 31C is composed of a cylindrical screw member or a cylindrical screw portion in which a male screw that can be screwed to the screw member 50 is formed. Among them, the inner peripheral surface 51a of the male screw member 51 located on the radially inner side is formed as a guide surface that guides the relative movement of the inner divided operation shafts 32A to 32C in the operation axis direction.

  At the lower end of the female screw member 50, a fitting connection portion 50a that fits inside the upper end of the first outer split operation shaft 31A and the upper end of the second outer split operation shaft 31B is formed integrally. In the vicinity of the fitting connection portion 50 a on the inner peripheral surface of the female screw member 50, a sealing material that seals between the connecting surfaces of the inner peripheral surface of the female screw member 50 and the outer peripheral surface of the male screw member 51. Is attached to the lower end of the second outer split operation shaft 31B, and the upper end of the male screw member 51 fixed to the lower end of the second outer split operation shaft 31B is connected to the lower end of the second outer split operation shaft 31B. A fitting connection portion 51b that fits inside is integrally formed.

  Of the male and female connecting portions 52 and 53 formed at the adjacent ends of the inner split operation shafts 32A to 32C, the female-side connecting portion 52 includes the upper end portion of the first inner split operation shaft 32A and the second inner split operation. The upper end portion of the shaft 32B is composed of a screw hole in which a female screw is formed, and the male connection portion 53 includes a lower end portion of the second inner divided operation shaft 32B and a lower end portion of the third inner divided operation shaft 32C. The screw shaft is formed with a male screw.

  Of the male and female connecting portions 50 and 51 formed at the adjacent ends of the outer split operation shafts 31A to 31C, they are fixed to the upper end portion of the first outer split operation shaft 31A and the upper end portion of the second outer split operation shaft 31B. The outer peripheral surface of the female-side connecting portion 50 is moved in the direction of the operating axis applied to the outer divided operating shafts 31A and 31B, that is, the operating force of the lever block 25, the water pressure in the water pipe 1, etc. Is formed on the gripping mounting surface 50b, which is an example of a mounting portion for the receiving portion 55 that receives the moving force due to.

  The receiving portion 55 has two first hooks 25A or 25B of the lever block 25 at two locations in the circumferential direction of a holding cylinder 55A that is clamped and fixed to the holding mounting surface 50b of the connecting portion 50 with a bolt or the like. The holding piece 55B of the receiving portion 55 is fixed to the holding cylinder 55A, and the inner divided operation shafts 32A and 32B projecting out of the flow path blocking work case 30 are provided on the holding cylinder 55A. A screw hole 55C is formed for fixing a substantially T-shaped shaft coupling member 56, which is detachably screwed to one end, with a bolt 57 and a nut 58, and the receiving portion 55 and the shaft coupling member 56 are formed. And a shaft coupling portion G that is detachably fixedly connected to one end portion of the outer divided operation shafts 31A to 31C and one end portion of the inner divided operation shafts 32A to 32C that project outside the flow path blocking work case 30. Is There.

  The shaft connecting member 56 is fixed to a connecting plate 56A in which a pair of insertion holes for the bolts 57 are formed, and the upper end portion of the first inner divided operation shaft 32A. And a connecting screw shaft 56B that is detachably coupled to screw holes (connecting portions) 52, 53 formed at the upper end of the second inner divided operation shaft 32B.

  As shown in FIGS. 8 to 20, the outer operating shaft 31 is formed on the external threaded portion formed in substantially the entire outer peripheral surface of the third inner divided operating shaft 32 </ b> C of the inner operating shaft 32. An operation screw member 60 that can be brought into contact with the upper end of the third outer divided operation shaft 31C via a thrust bearing 59 is screwed and fixed to the third outer divided operation shaft 31C in a detachable manner. As shown in FIG. 20, the stopper nut 35 is second pressed across the lower receiver 70 and the upper receiver 80 that is detachably screwed to the upper portion of the third inner divided operation shaft 32C. A pair of hydraulic jacks 61 that detachably slide the inner operation shaft 32 upwardly with respect to the outer operation shaft 31 while being in contact with the lower surface of the plate 34 are detachably attached. First Due to the clamping action accompanying the proximity movement of the pressing plate 34 toward the first pressing plate 33, the elastic body 37 for expanding the diameter in an uncompressed state is elastically deformed into a diameter-expanded state in close contact with the inner peripheral wall surface of the branch pipe portion 2. Then, the branch flow path P in the branch pipe part 2 is shielded in a sealed state.

  As shown in FIGS. 16 to 20, the lower support 70 is formed on the lower surface of the mounting substrate 71 in which the insertion hole 71 a of the third outer divided operation shaft 31 </ b> C is formed. A pair of engaging plates 72 that are engaged with the engaging grooves 31a continuously or intermittently formed in the circumferential direction from the left and right in the horizontal direction within the range of the long holes 72a formed in the engaging plates 72. The nuts 74 are fixedly connected to the left and right side portions of the lower surface of the mounting board 71 by screwing a lock bolt 75 for holding the engagement plate 72 in the engaged state. Configured.

  The mounting board 71 is formed with a screw hole 71b for the bolt 73, and a lower surface of the mounting board 71 is provided with a guide surface 76a for guiding the movement of the engagement plate 72 in the left-right direction. A pair of reinforcing plates 76 are fixed.

  The upper receiving member 80 includes a screw cylinder shaft 81 that is detachably fixed to the upper portion of the third inner divided operation shaft 32C, and a jack receiving plate 82 that is fixed to the upper end of the screw cylinder shaft 81. It consists of and.

  8 and 9, the top plate portion 30b of the flow path blocking work case 30 fixedly connected to the downstream connection portion of the work on / off valve 19 is provided with the outer operation shaft divided as described above. Among the outer divided operation shafts 31 </ b> A to 31 </ b> C and the inner divided operation shafts 32 </ b> A to 32 </ b> C of the inner operation shaft 32, both the first outer and inner divisions having the retaining locking means E and the flow path blocking means D are provided. Operation shafts 31A and 32A are slidably provided.

  In addition, a holding cylinder 55A of the receiving portion 55 constituting one of the shaft coupling portions G is connected to the female screw member 50 on one end portion side of the first outer divided operation shaft 31A protruding outside the flow path blocking work case 30. Is held and fixed, and the screw hole 52 at one end of the first inner split operation shaft 32A protruding out of the flow path blocking work case 30 is connected to the connecting screw of the shaft connecting member 56 constituting the other of the shaft connecting portions G The shaft 56B is screwed and fixed, and the connecting plate 56A of the shaft connecting member 56 is fixedly connected to the holding cylinder 55A of the receiving portion 55 with bolts 57 and nuts 58.

  Further, the locking body 38 attached to both the locking pieces 55B of the receiving portion 55 and the connecting flange portion 30d of the second working case portion 30B has an inner and outer portion penetrating the working case 30 for blocking the flow path. An example of forcible feeding means for forcibly feeding one set or a plurality of sets of outer divided operation shafts 31A to 31C and inner divided operation shafts 32A to 32C, the first hook 25A and the second hook 25B of the lever block 25 are engaged. In addition, the top plate portion 30b of the flow path blocking work case 30 has a lowering restricting tool 24 that holds the base end side (lower end side) of the first outer divided operation shaft 31A of the outer operation shaft 31. It is in contact.

  [5] As shown in FIG. 10, after the lowering restrictor 24 is removed from the base end side of the first outer split operation shaft 31A, the operation lever 25D of the lever block 25 is wound with a chain (or wire) 25C. The first first outer divided operation shaft 31A and the first inner divided operation shaft 32A penetrating through the flow path blocking work case 30 are operated to the holding side of the receiving portion 55. The body 55 </ b> A is forcibly sent to a state where the body 55 </ b> A contacts the top plate portion 30 b of the flow path blocking work case 30.

  [6] As shown in FIG. 11, the fixed connection between the connecting plate 56A of the shaft connecting member 56 and the holding cylinder 55A of the receiving portion 55 is released, and the connecting screw shaft 56B of the shaft connecting member 56 is operated to be split inward. Remove from the screw hole 52 at one end of the shaft 32A. In this state, there is no restricting member that prevents the first inner divided operation shaft 32A from moving upward, so that the retaining locking means E of the first inner divided operation shaft 32A moves upward due to water pressure. The pair of locking links 45 and 46 project outward in the radial direction while bending in a “<” shape in the flow path of the gate valve 3.

  [7] As shown in FIG. 12, the screw shaft 53 at the lower end of the second inner divided operation shaft 32B is screwed and connected to the screw hole 52 at the upper end of the first inner divided operation shaft 32A. The male screw member 51 at the lower end of the second outer divided operation shaft 31B is screwed to the female screw member 50 at the upper end portion of the first outer divided operation shaft 31A. The connecting screw shaft 56B of the shaft connecting member 56 is screwed and fixed into the screw hole 52 at the upper end.

  [8] As shown in FIG. 13, after once removing the connecting screw shaft 56B of the shaft connecting member 56 from the screw hole 52 of the second inner divided operation shaft 32B, it protrudes out of the flow path blocking work case 30. A second inner divided operation shaft that protrudes out of the flow path blocking work case 30 by holding the holding cylinder 55A of the receiving portion 55 to the female screw member 50 on the upper end side of the second outer divided operation shaft 31B. The connecting screw shaft 56B of the shaft connecting member 56 is screwed and fixed into the screw hole 52 at the upper end portion of 32B, and a bolt 57 and a nut 58 are attached to the holding cylinder 55A of the receiving portion 55 of the connecting plate 56A of the shaft connecting member 56. Connect with fixed.

  The second hook 25B of the lever block 25 is changed in order from the both locking pieces 55B of the receiving portion 55 located on the lower side to the both locking pieces 55B of the receiving portion 55 located on the upper side.

  [9] As shown in FIG. 14, after removing the receiving portion 55 located on the lower side from the female screw member 50 at the upper end of the first outer split operation shaft 31A, the operation lever 25D of the lever block 25 is By operating the chain (or wire) 25C to the tension side to wind up the second and second divided outer operation shafts 31B and 32B penetrating the work case 30 for blocking the flow path. Then, the holding cylinder 55A of the receiving portion 55 located on the upper end side of the second outer split operation shaft 31B is forcibly sent to a state where it contacts the top plate portion 30b of the flow path blocking work case 30.

  [10] As shown in FIG. 15, the fixed connection between the connecting plate 56A of the shaft connecting member 56 and the holding cylinder 55A of the receiving portion 55 is released, and the connecting screw shaft 56B of the shaft connecting member 56 is operated to be divided inwardly. Remove from the screw hole 52 at one end of the shaft 32A. In this state, since there is no restricting member that prevents the first and second inner divided operation shafts 32A and 32B from moving upward, the first and second inner divided operation shafts 32A and 32B are moved upward due to water pressure. As a result, the pair of locking links 45 and 46 of the locking locking means E project outward in the radial direction while bending in the shape of a "<", and the branch flow channel opening on the inner peripheral surface of the second branch pipe portion 2B Engage with the periphery.

  The screw shaft 53 at the lower end of the third inner divided operation shaft 32C is screwed into the screw hole 52 at the upper end portion of the second inner divided operation shaft 32B, and the upper end of the second outer divided operation shaft 31B is connected. A male screw 51 at the lower end of the third outer split operation shaft 31C is screwed to the female screw member 50.

  [11] As shown in FIG. 16, a pair of engagement plates 72 of the lower support 70 are inserted into the engagement groove 31a formed in the third outer divided operation shaft 31C in the circumferential direction continuously or intermittently from the horizontal direction. In this state, both engagement plates 72 are fixedly connected to the lower surface of the mounting substrate 71 with bolts 73, and the engagement plate 72 is locked by a lock bolt 75 screwed to both nuts 74 on the lower surface of the mounting substrate 71. Is prevented from moving toward the disengagement side.

  The second hook 25B of the lever block 25 is replaced in order by appropriate means from the both locking pieces 55B of the receiving portion 55 positioned on the lower side to the mounting substrate 71 of the lower receiving tool 70 positioned on the upper side.

  [12] As shown in FIGS. 16 and 18, after the receiving portion 55 located on the lower side is removed from the female screw member 50 at the upper end of the second outer divided operation shaft 31B, the operation lever of the lever block 25 is operated. 25D is operated to the tension side which winds up the chain (or wire) 25C, and the third third outer divided operation shaft 31C and the third inner divided operation shaft held in the flow path blocking work case 30 32C is forcibly fed until the stopper nut 35 comes into contact with the lower surface of the second pressing plate 34.

Thereafter, an operation screw member 60 that can be brought into contact with the upper end of the third outer divided operation shaft 31C of the outer operation shaft 31 via the thrust bearing 59 is screwed onto the third inner divided operation shaft 32C, and the outer operation shaft. After the disengagement operation of the retaining locking means E caused by the downward movement of the inner operation shaft 32 with respect to 31 is prevented, the lever block 25 is removed.
In this state, the pair of locking links 45 and 46 of the retaining locking means E are configured to engage with a set locking position on the peripheral edge of the branch flow channel opening on the inner peripheral surface of the second branch pipe portion 2B. ing.

  [13] As shown in FIGS. 19 and 20, after the screw cylinder shaft 81 of the upper receiving member 80 is screwed and fixed to the upper part of the third inner divided operation shaft 32C, the jack of the upper receiving member 80 is jacked. A pair of hydraulic jacks 61 are mounted between the receiving plate 82 and the mounting substrate 71 of the lower receiving member 70, and the second pressing plate 34 is moved closer to the first pressing plate 33 side by the extension operation of the hydraulic jack 61. The elastic body 37 for expanding the diameter in a non-compressed state is elastically deformed into a diameter-expanding state in close contact with the inner peripheral wall surface of the branch pipe part 2 by the clamping action accompanying the Shield in a sealed state.

  [14] As shown in FIG. 21, the operating screw member 60 screwed into the third inner divided operation shaft 32C is connected to the upper end of the third outer divided operation shaft 31C of the outer operation shaft 31 via a thrust bearing 59. The outer operation shaft 31 and the inner operation shaft 32 are prevented from moving relative to each other in the operation axis direction.

  Next, the pair of hydraulic jacks 61 that have contracted the hydraulic jack 61 are removed from between the jack receiving plate 82 of the upper receiving member 80 and the mounting substrate 71 of the lower receiving member 70, and the upper receiving member The 80 jack receiving plates 82 are removed from the upper side of the third inner divided operation shaft 32C, and the lower receiving tool 70 is further removed from the upper end of the third outer divided operation shaft 31C.

  [15] As shown in FIG. 22, the gate valve 3 fixedly connected to the connection flange portion 2 c of the branch pipe portion 2, the connection flange portion 2 c of the branch pipe portion 2, and the upstream side connection flange portion of the gate valve 3 The plate valve-type flow path cutoff device A attached to 3a, the work on / off valve 19 fixedly connected to the gate valve 3, and the flow path cutoff work case 30 fixedly connected thereto are divided. 30 A of 1 work case parts and the 2nd work case part 30B are removed in order in the state decomposed | disassembled separately from the 2nd work case part 30B side.

  [16] As shown in FIG. 23, the gate valve 8 which is an example of the selected novel on-off valve is connected with a limited gap between the ceiling wall W of the structure and the upper end of the third inner divided operation shaft 32C. The outer operation shaft 31 and the inner operation shaft 32 are externally passed through, and the connection flange portion 2c of the branch pipe portion 2 is provided with an upstream connection flange portion (an example of a connection portion) 8A of the gate valve 8 as an example of the fastener 4. These are bolted and connected in a watertight state (sealed state) through a bolt 4A and a nut 4B.

  [17] As shown in FIG. 24, the first work case portion 30A and the second work case portion 30B that constitute the flow path blocking work case 30 are divided into a ceiling wall W of the structure and a third inner divided operation shaft. After the outer operation shaft 31 and the inner operation shaft 32 are individually packaged through a limited gap between the upper end of the 32C, the connection flange portion 30a of the first work case portion 30A is connected to the downstream connection flange of the gate valve 8. It is fastened and connected in a watertight state (sealed state) to a part (an example of a connecting part) 8B via a bolt 4A and a nut 4B as an example of a fastener 4 and is further connected to the connecting flange part of the first work case part 30A. 30c and the connection flange portion 30d of the second work case portion 30B are tightened and connected in a watertight state so as to be detachable through bolts 4A and nuts 4B as an example of the fastener 4.

  [18] As shown in FIG. 25, a first presser operating rod provided with a pair of short locking rings 85 and a pair of long locking rings 86 at the upper end of the third outer split operation shaft 31C. 87 is detachably fitted and held, and the lever 38 attached to the short side locking ring 85 of the first presser operating rod 87 and the connecting flange portion 30d of the second work case portion 30B has the lever The first hook 25A and the second hook 25B of the block 25 are engaged.

  Next, the operating screw member 60 that is in contact with the upper end surface of the third outer divided operating shaft 31C of the outer operating shaft 31 via the thrust bearing 59 is screwed to the loose side, and the both pressing plates 33, 34 are operated. The maximum facing distance between the pressing surfaces 33a and 34a is returned to the set facing distance, and the elastic body 37 for diameter expansion is elastically returned to the open state of the flow path when not compressed.

  [19] As shown in FIG. 26, a second presser provided with a fitting portion 88A fitted and held on the upper end portion of the third inner divided operation shaft 32C so as to be detachable from the operation axis direction. An operating rod 88 is attached, and both long-side locking rings 86 of the first presser operating rod 87 are engaged with the second presser operating rod 88 while pushing the third inner divided operating shaft 32C of the inner operating shaft 32 downward. As a result, the distance from the lower surface of the second pressing plate 34 to the mounting cylinder 47 that is slidably fitted to the screw shaft portion 32a of the inner operation shaft 32 is restored to the set facing distance, and the retaining The pair of locking links 45 and 46 of the locking means E is switched to a substantially straight non-locking posture.

  Thereafter, the operation lever 25D of the lever block 25 is extended to the loose side of the chain 25C, and the third outer divided operation shaft 31C and the third inner divided operation shaft 32C are moved to the top of the flow path blocking work case 30 by this extending operation. Pull outward from the plate 30b.

  [20] As shown in FIG. 27, the holding cylinder 55A of the receiving portion 55 is attached to the female screw member 50 on the upper end side of the second outer divided operation shaft 31B protruding outside the flow path blocking work case 30. The second hook 25B of the lever block 25, which is held and fixed and engaged with the short-side locking ring 85 of the first presser operating bar 87, is attached to both locking pieces 55B of the receiving portion 55 located on the lower side. Change the order.

  In this state, both long-side locking rings 86 of the first presser operating rod 87 engaged with the second presser operating rod 88 are disengaged, and the fitting portion 88A of the second presser operating rod 88 is released. Is removed from the upper end of the third inner split operation shaft 32C, and the first presser operating bar 87 is removed from the upper end of the third outer split operation shaft 31C.

  [21] As shown in FIG. 28, the screw connection between the screw hole 52 at the upper end of the second inner divided operation shaft 32B and the screw shaft 53 at the lower end of the third inner divided operation shaft 32C is released, After releasing the threaded connection between the female screw member 50 at the upper end of the second outer split operation shaft 31B and the male screw member 51 at the lower end of the third outer split operation shaft 31C, the flow blocking work is performed. A connecting screw shaft 56B of a shaft connecting member 56 constituting the other of the shaft connecting portions G is screwed and fixed to the screw hole 52 at the upper end portion of the second inner divided operation shaft 32B protruding outside the case 30. The connecting plate 56A of the member 56 is fixedly connected to the holding cylinder 55A of the receiving portion 55 with bolts 57 and nuts 58 while pushing the second inner divided operation shaft 32B downward.

  In this state, the distance from the lower surface of the second pressing plate 34 to the mounting cylinder 47 that is slidably fitted to the screw shaft portion 32a of the inner operation shaft 32 returns to the set facing distance, and the retaining The pair of locking links 45 and 46 of the locking means E is switched to a substantially straight non-locking posture.

  [22] As shown in FIG. 29, the operation lever 25D of the lever block 25 is extended to the loose side of the chain 25C, and the second outer divided operation shaft 31B and the second inner divided operation shaft 32B are flown by this operation. Pull out outward from the top plate portion 30b of the road blocking work case 30.

  Next, the holding cylinder 55A of the receiving portion 55 is clamped and fixed to the female screw member 50 on the upper end side of the first outer divided operation shaft 31A protruding outside the flow path blocking work case 30, and the second The second hook 25B of the lever block 25 engaged with both locking pieces 55B of the receiving portion 55 located on the upper end side of the outer divided operation shaft 31B is located on the upper end side of the first outer divided operation shaft 31A. It replaces in order to the both locking pieces 55B of the receiving part 55.

  [23] As shown in FIG. 30, while releasing the screw connection between the screw hole 52 at the upper end of the first inner split operation shaft 32A and the screw shaft 53 at the lower end of the second inner split operation shaft 32B, After the threaded connection between the female screw member 50 at the upper end of the first outer split operation shaft 31A and the male screw member 51 at the lower end of the second outer split operation shaft 31B is released, the flow blocking work is performed. A connecting screw shaft 56B of a shaft connecting member 56 constituting the other of the shaft connecting portions G is screwed and fixed into a screw hole 52 at the upper end portion of the first inner divided operation shaft 32A protruding outside the case 30. The connecting plate 56A of the member 56 is fixedly connected to the holding cylinder 55A of the receiving portion 55 with bolts 57 and nuts 58 while pushing the first inner divided operation shaft 32A downward.

  [24] As shown in FIG. 31, the operating lever 25D of the lever block 25 is fed out to the loose side of the chain 25C, and the first outer divided operating shaft 31A and the first inner divided operating shaft 32A are flown by this feeding operation. After taking out into the storage space in the road blocking work case 30 and closing the valve body of the gate valve 8, the connection flange portion 30a of the first work case portion 30A and the downstream side connection flange portion 8B of the gate valve 8 are closed. The fixed connection with is released, and the flow path blocking device C is removed.

  Thereafter, a connecting flange portion 9A of an air valve 9 as an example of a selected novel fluid device is connected to a downstream side connecting flange portion 8B of the gate valve 8 via a bolt 4A and a nut 4B as an example of a fastener 4. Tightly connect in a watertight state (sealed state) so as to be detachable.

[Second Embodiment]
In the above-described first embodiment, the cylindrical outer operation shaft 31 that can be inserted into the branch pipe portion 2 through the gate valve (open / close valve) 3 connected to the branch pipe portion 2 of the water pipe 1 and the same A flow path blocking position in the branch pipe portion 2 by the first relative movement operation of the operation shafts 31 and 32 at one end side portion with the inner operation shaft 32 inserted slidably in the operation axis direction. The retaining / engaging means E that can be switched to a position that can be engaged with the upstream side portion and the second relative movement operation of the operation shafts 31 and 32 block the flow path in the branch pipe portion 2. After the flow path in the branch pipe section 2 is shut off while maintaining the transport of clean water in the water pipe 1 using the flow path cutoff device C provided with the flow path cutoff means D that can be switched to the state of Although the on-off valve updating method of the fluid piping system for updating the gate valve 3 has been described, FIGS. As shown in FIG. 8, the flow that is switched to a state in which the flow path in the branch pipe portion 2 is blocked by the relative movement operation of the operation shafts 31 and 32 at one end side portion of the outer operation shaft 31 and the inner operation shaft 32. Using the channel shut-off device C provided with only the channel shut-off means D, the channel in the branch pipe part 2 is shut off while maintaining the water supply transport in the water pipe 1, and then the gate valve 3 is updated. You may comprise.

  The outer operating shaft 31 and the inner operating shaft 32 used in this fluid piping system on-off valve updating method are for working from the upper surface of the gate valve 3 to the ceiling wall W of the structure, as in the first embodiment. Since the height of the space is limited, the outer divided operation shafts 31A to 31C and the inner divided operation shaft 32A divided into a plurality of parts (three divisions) in the operation axis direction corresponding to the restricted height of the work space. ~ 32C.

  The channel blocking means D of the channel blocking device C is also configured in substantially the same manner as the channel blocking means D described in the first embodiment, but the most different point is the first inner divided operation shaft 32A. The second pressure plate 34 is screwed and fixed to the screw shaft portion 32a of the first inner divided operation shaft 32A connected to the second pressure plate 34, and the first inner divided operation shaft 32A and the second pressure plate 34 are connected. It is configured to move integrally along the operation axis direction.

  Further, the flow path blocking work case 30 fixedly connected in a watertight manner to the downstream connection flange portion 3b of the gate valve 3 is connected to the valve body 3A of the gate valve 3 which is closed. The first pressing plate 33, the second pressing plate 34, and the diameter-expanding elastic body 37 constituting D are configured in an internal space that can be accommodated.

  The lowering restricting tool 24 for preventing the first inner divided operation shaft 32A from dropping by its own weight with respect to the top plate portion 30d of the flow path blocking work case 30 is the same as in the first embodiment described above. A pair of holding plates 24A capable of holding and fixing the inner divided operation shaft 32A, a bolt 24B with a hexagonal head that fastens and fixes both holding plates 24A in a holding state, and a bolt 24C with a rotation operation portion.

  Further, as a forcible feeding means for forcibly feeding one or a plurality of sets of inner and outer divided operation shafts 31A to 31C and inner divided operation shafts 32A to 32C penetrating in the flow path blocking work case 30, A lever block 25 is used as in the first embodiment.

Next, the fluid piping system on-off valve updating method in the second embodiment will be described based on the following steps [25] to [32].
[25] As shown in FIG. 32, the flow of the flow path shutoff device C that shuts off the branch flow path P at the flow path cut-off setting position in the branch pipe section 2 is connected to the downstream connection flange portion 3b of the gate valve 3. The road blocking work case 30 is fixedly connected in a watertight state, and the top plate portion 30b of the flow path blocking work case 30 has outer divided operation shafts 31A to 31C of the outer operation shaft 31 divided as described above and Of the inner divided operation shafts 32A to 32C of the inner operation shaft 32, the first outer inner divided operation shafts 31A and 32A provided with the flow path blocking means D are slidably provided.

  Of the first inner divided operation shaft 32A, the base shaft portion immediately after protruding the top plate portion 30d of the flow path blocking work case 30 is clamped and fixed by the pair of clamping plates 24A of the lowering restrictor 24. The lower surface of the holding plate 24A is brought into contact with the top plate portion 30d of the flow path blocking work case 30.

  A pair of locking rings is provided at a location near the upper end of the first outer split operation shaft 31A protruding outside the flow path blocking work case 30 while preventing the first inner split operation shaft 32A from lowering its own weight. A third presser operation lever 91 provided with 90 is detachably held, and the downstream connection flange portion 3b of the gate valve 3 is engaged with the first hook 25A or the second hook 25B of the lever block 25. A mounting board 94 having a possible locking body 92 and a mounting bracket 93 is fixedly connected, and the locking body 92 of the mounting board 94 and the locking ring 90 of the third presser operating rod 91 are connected to the lever block 25. The first hook 25A and the second hook 25B are engaged.

  Next, after the lowering restrictor 24 is removed from the base end side of the first outer split operation shaft 31A, the operation lever 25D of the lever block 25 is operated to the tension side where the chain 25C is wound, and the flow path The first outer divided operation shaft 31A and the first inner divided operation shaft 32A that are provided in the work case 30 for blocking are forcibly fed.

[26] As shown in FIG. 33, the first outer split operation shaft 31A that protrudes out of the flow path blocking work case 30 over the upper end portion of the support column 95 fixedly connected to the pair of mounting brackets 93 of the mounting substrate 94. Both end portions of the fourth presser operating rod 96 that is clamped and fixed to the female screw member 50 on the one end portion side are fixedly connected.

  Although not shown in the figure, the fourth presser operating rod 96 is a split gripper that can be externally attached to any part of one or a plurality of outer divided operation shafts 31A to 31C provided through the flow path blocking work case 30. There is provided a gripping and fixing operation portion including a ring and a fastening tool such as a bolt and a nut for switching the split gripping wheel between a gripping fixed state and a gripping release state.

  By the mounting substrate 94, a pair of support columns 95, and a fourth presser operating rod 96, one or a plurality of sets of outer divided operation shafts 31A to 31C and inner divided inside and outside the passage blocking work case 30 are provided. A shaft fixing machine frame is configured to fix and hold the operation shafts 32A to 32C at predetermined positions against water pressure.

In the state of FIG. 33, the upward movement of the first outer and inner split operation shafts 31A and 32A provided with the flow path blocking means D is held by the fourth presser operation rod 96 of the shaft fixing machine frame. It is blocked by the fixing action and the tension fixing action by the lever block 25.
It should be noted that the upward movement of both split operation shafts 31A and 32A can be prevented by only one of the holding and fixing operation by the fourth presser operation rod 96 of the shaft fixing machine frame and the tension fixing operation by the lever block 25. it can.

[27] As shown in FIG. 34, the second inner divided operation shaft 32B and the third inner divided operation shaft 32C are sequentially screwed and connected to the first inner divided operation shaft 32A, and the first outer divided operation shaft. The second outer divided operation shaft 31B and the third outer divided operation shaft 31C are screwed and connected in order to 31A.

  Further, a first presser operating rod 87 having a pair of short locking rings 85 and a pair of long locking rings 86 is detachably fitted and fixed to the upper end portion of the third outer split operation shaft 31C. Then, the second hook 25B of the lever block 25 engaged with the locking ring 90 of the third presser operating rod 91 is sequentially replaced with the short-side locking ring 85 of the first presser operating rod 87. The third presser operating rod 91 is removed from the first outer split operating shaft 31A.

[28] As shown in FIG. 35, after the holding and fixing operation portion of the fourth presser operating rod 96 is operated to release the grip, the operation lever 25D of the lever block 25 is operated to the tension side for winding the chain 25C. The outer divided operation shafts 31A to 31C of the outer operation shaft 31 and the inner divided operation shafts 32A to 32C of the inner operation shaft 32 that are provided in the flow path blocking work case 30 are forcibly fed.

[29] As shown in FIG. 36, it is threadedly engaged with the male thread portion of the third inner divided operation shaft 32C in a state of contacting the upper end of the third outer divided operation shaft 31C of the outer operation shaft 31 via the thrust bearing 59. When the operating screw member 60 is screwed to the tightening side, the second pressing plate 34 is moved closer to the first pressing plate 33 as the inner operating shaft 32 is lifted with respect to the outer operating shaft 31. Due to the clamping action of the pressing plates 33, 34, the diameter-expanding elastic body 37 that is in an uncompressed state is elastically deformed into a diameter-expanding state in close contact with the inner peripheral wall surface of the branch pipe portion 2, The flow path P is shielded in a sealed state.

  The upward movement of the outer divided operating shafts 31A to 31C of the outer operating shaft 31 and the inner divided operating shafts 32A to 32C of the outer operating shaft 31 penetrating in the flow path blocking work case 30 is a shaft fixing machine. It is blocked by the holding and fixing action by the fourth presser operation lever 96 of the frame and the tension fixing action by the lever block 25.

[30] As the steps of FIGS. 36 to 37, while maintaining the holding and fixing action by the fourth presser operating rod 96 of the shaft fixing machine frame and the tension fixing action by the lever block 25, the branch pipe section 2 The fixed connection between the connection flange portion 2c and the upstream connection flange portion 3a of the gate valve 3 is released, and the gate valve 3 and the flow path blocking work case 30 are separated and moved upward from the connection flange portion 2c of the branch pipe portion 2. Let

  The fourth presser operating rod 96 removed from the upper ends of the pair of support columns 95 is replaced with the lower side portions of the two support columns 95 or another prepared fourth presser operating rod 96 is connected to the lower side portion of the two support columns 95. And the base portion of the first outer split operation shaft 31A exposed by the separation movement of the gate valve 3 and the flow path blocking work case 30 is held and fixed by the holding and fixing operation portion of the fourth presser operating rod 96.

[31] As shown in FIG. 38, the short-side locking ring 85 and the mounting board 94 of the first presser operating rod 87 are maintained while maintaining the holding and fixing action of the fourth presser operating rod 96 of the shaft fixing machine frame. After removing the lever block 25 engaged with the locking body 92 and removing the first presser operating rod 87 from the upper end portion of the third outer divided operation shaft 31C, the gate valve 3 and the flow path shut-off are removed. The work cases 30 are removed in order in an individually disassembled state.

[32] After the step [31], the gate valve 8 which is an example of the new on-off valve selected by the reverse procedure and the air valve 9 which is an example of the selected new fluid device are attached.

In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.
In this embodiment, the mounting substrate 94 is fixedly connected to the downstream connection flange portion 3b of the gate valve 3. However, the mounting substrate 94 is connected to the branch pipe portion 2, the fluid pipe 1 or a fixing portion existing in the vicinity thereof. It may be attached.

[Other Embodiments]
(1) In the first and second embodiments described above, the fluid piping system in which the branch pipe portion 2 is integrally formed in the middle of the fluid pipe 1 such as a water pipe has been described. A branch pipe portion 2 provided with a plurality of split joint bodies fixedly connected in a detachable manner along the direction, and communicating with a through hole formed in the fluid pipe 1 in one split joint body from the pipe radial direction. The technique of the present invention may be applied to a fluid piping system in which a protruding pipe joint is mounted and an on-off valve is attached to a branch pipe portion of the pipe joint.

(2) The flow path blocking means D has any structure as long as it can be switched to a state in which the flow path in the pipe portion is blocked by the relative movement operation of the outer operation shaft 31 and the inner operation shaft 32. May be used.
(3) As the retaining locking means E, the first relative movement operation of the outer operation shaft 31 and the inner operation shaft 32 can be engaged with the upstream portion of the flow path blocking position in the pipe section. Any structure can be used as long as it can be switched to a different posture.

Partially cutaway side view before updating showing the fluid piping system on-off valve updating method of the first embodiment of the present invention Partially cutaway side view when the air valve is removed Plan view of a plate valve type channel shut-off device used in the on-off valve update method Enlarged cross-sectional view of the main part of the plate valve type flow path blocking device Partial cutaway side view with cleaning device attached Partial cutaway side view when the cleaning device is sent to the cleaning position Enlarged sectional view of the main part of the cleaning device Side view with a part cut away when a flow-blocking device is installed Enlarged cross-sectional view of the channel blocker Partially cutaway side view when the first outer split operation shaft and the first inner split operation shaft are pushed in Partial cutaway side view when the shaft coupling member is removed Partially cutaway side view when the second outer split operation shaft and the second inner split operation shaft are connected Partial cutaway side view showing replacement of lever block Partially cutaway side view when the second outer split operation shaft and the second inner split operation shaft are pushed in Partially cutaway side view when the third outer split operation shaft and the third inner split operation shaft are connected Partial cutaway side view of the lower bracket Plan view, side view, front view of mounting board for lower support Partial cutaway side view when the lever block is removed Side view with part cut away when the upper support is attached Partial cutaway side view with hydraulic jack installed Partially cutaway side view when the hydraulic jack, upper receptacle, and lower receptacle are removed Partially cutaway side view when the work block for channel shutoff, the on-off valve for work, and the gate valve are removed Side view with a part cut away when a new gate valve is installed Partially cutaway side view when the flow path blocking work case is installed Partially cutaway side view with first presser foot and lever block attached Partially cutaway side view with the second presser foot Partially cutaway side view when the lever block is replaced with the receiving part and the both presser foot is removed Partially cutaway side view when the third outer split operation shaft and the third inner split operation shaft are removed Partially cutaway side view showing replacement of the lever block after the second outer divided operation shaft and the second inner divided operation shaft have been pulled out Partially cutaway side view when the second outer split operation shaft and the second inner split operation shaft are removed Partially cutaway side view when the flow blocker is removed and a new air valve is installed Partially cutaway side view showing an on-off valve updating method for a fluid piping system of a second embodiment of the present invention Partially cutaway side view when the first outer split operation shaft and the first inner split operation shaft are pushed in Partially cutaway side view when the second and third outer split operation shafts and the second and third inner split operation shafts are connected Partially cutaway side view when the second and third outer split operation shafts and the second and third inner split operation shafts are pushed in. Partial cutaway side view during flow path blocking operation Partial cutaway side view when the gate valve is disconnected Cross-sectional side view when the gate valve and flow path blocking work case are removed

Explanation of symbols

C Channel blocking device D Channel blocking means E Detent locking means G Shaft connecting part 1 Fluid pipe (water pipe)
2 Branch pipe section 3 On-off valve (gate valve)
8 On-off valve (gate valve)
25 Lever block (forced feeding means)
30 Working case for channel block (work case)
30b Top plate part 31 Outer operation shaft 31A Outer divided operation shaft (first outer divided operation shaft)
31B Outer split operation axis (second outer split operation axis)
31C Outer split operation axis (third outer split operation axis)
32 inner operation shaft 32A inner divided operation shaft (first inner divided operation shaft)
32B Inner division operation axis (second inner division operation axis)
33C Inner split operation axis (third inner split operation axis)
50 Connecting part (screw member)
50b wearing part (mounting surface for holding)
51 Connecting part (screw member)
51a Guide surface 52 Connecting part (screw hole)
53 Connecting part (screw shaft)
54 Sealing material (O-ring)
55 Receiver
56 Shaft coupling member

Claims (7)

A cylindrical outer operation shaft that can be inserted into the branch pipe section through an on-off valve connected to the branch pipe section of the fluid pipe and a work case attached thereto, and is slidably inserted in the axial direction with respect to this. A flow path blocking device provided with a flow path blocking means that can be switched to a state in which the flow path in the branch pipe portion is blocked by a relative movement operation of both operation shafts at one end side portion with the inner operation shaft,
Wherein each of the outer operating shaft and the inner operating shaft is composed of an outer split operation shaft and inner split operation shaft is divided into a plurality in operation the axial direction of the adjacent end of the outer split operation shaft and the inner division operation shaft In each of the adjacent end portions, a connecting portion that is detachably connected from the operation axis direction is formed,
Of the connecting portions that form a pair on the outer divided operation shaft side, the inner peripheral surface of the connecting portion located on the radially inner side is a guide surface that guides the relative movement of the inner divided operation shaft in the axial direction. Of the connecting portions formed on the outer divided operation shaft side and formed on the outer divided operation shaft side, the outer peripheral surface of the connecting portion located on the radially outer side is the operation axis direction applied to the outer divided operation shaft A mounting surface for clamping is provided that can clamp and fix the receiving portion that receives the moving force to
The first inner and outer divided operation shafts provided with the flow path blocking means among the inner and outer divided operation shafts are slidably penetrating through the top plate portion of the work case,
Over the working case and the receiving portion clamped and fixed on the clamping mounting surface on the first outer divided operation shaft side or the receiving portion clamped and fixed on the clamping mounting surface on the outer divided operation shaft side connected thereto A flow path cut-off means provided with a forcible feeding means for forcibly feeding the first inner and outer divided operation shafts and the inner and outer divided operation shafts connected to and connected to the work case while sequentially changing them. apparatus. A cylindrical outer operation shaft that can be inserted into the branch pipe section through an on-off valve connected to the branch pipe section of the fluid pipe and a work case attached thereto, and is slidably inserted in the axial direction with respect to this. A retaining member that is switched to a position that can be engaged with the upstream portion of the flow path blocking position in the branch pipe portion by the first relative movement operation of the two operating shafts at one end portion of the inner operating shaft. A flow path blocking device provided with a blocking means and a flow path blocking means that is switched to a state in which the flow path in the branch pipe section is blocked by a second relative movement operation of both the operation shafts,
Wherein each of the outer operating shaft and the inner operating shaft is composed of an outer split operation shaft and inner split operation shaft is divided into a plurality in operation axis direction, adjacent ends of the outer split operation shaft and the inner division operation shaft In each of the adjacent end portions, a connecting portion that is detachably connected from the operation axis direction is formed,
Of the connecting portions that form a pair on the outer divided operation shaft side, the inner peripheral surface of the connecting portion located on the radially inner side is a guide surface that guides the relative movement of the inner divided operation shaft in the axial direction. Of the connecting portions formed on the outer divided operation shaft side and formed on the outer divided operation shaft side, the outer peripheral surface of the connecting portion located on the radially outer side is the operation axis direction applied to the outer divided operation shaft A mounting surface for clamping is provided that can clamp and fix the receiving portion that receives the moving force to
The first inner and outer divided operation shafts provided with the flow path blocking means among the inner and outer divided operation shafts are slidably penetrating through the top plate portion of the work case,
Over the working case and the receiving portion clamped and fixed on the clamping mounting surface on the first outer divided operation shaft side or the receiving portion clamped and fixed on the clamping mounting surface on the outer divided operation shaft side connected thereto A flow path cut-off means provided with a forcible feeding means for forcibly feeding the first inner and outer divided operation shafts and the inner and outer divided operation shafts connected to and connected to the work case while sequentially changing them. apparatus. A shaft coupling portion that is detachably fixedly connected to one end portion of the outer divided operation shaft and one end portion of the inner divided operation shaft that protrudes outside the top plate portion of the work case is fixed to the receiving portion and the receiving portion. A generally T-shaped shaft coupling member that is coupled and screwed and fixed to the coupling portion of the inner divided operation shaft,
The flow path blocking device according to claim 2, wherein the forced feeding means is provided across the receiving portion of the shaft coupling portion and the work case. Before Kisotogawa divided passage interrupting device according to any one of the operation claims 1-3 sealing material is provided in the axial side sealing between coupling surfaces of the coupling portion of the pair. A cylindrical outer operation shaft that can be inserted into the branch pipe section through an on-off valve connected to the branch pipe section of the fluid pipe and a work case attached thereto, and is slidably inserted in the axial direction with respect to this. Using a flow path blocking device provided with a flow path blocking means that is switched to a state in which the flow path in the branch pipe portion is blocked by a relative movement operation of both operation shafts at one end of the inner operating shaft. An on-off valve update method for a fluid piping system that updates the on-off valve after blocking a flow path in the branch pipe portion while maintaining fluid transportation in the pipe,
Constructed from the passage of each of the outer operating shaft and the inner operating shaft of the shut-off device is divided into a plurality in operation the axial direction of the outer split operation shaft and inner split operation axis, adjacent ends of the outer split operation shaft and Each of the adjacent end portions of the inner divided operation shaft is formed with a connection portion that is detachably connected to each other from the operation axis direction,
Of the connecting portions that form a pair on the outer divided operation shaft side, the inner peripheral surface of the connecting portion located on the radially inner side is a guide surface that guides the relative movement of the inner divided operation shaft in the axial direction. Of the connecting portions formed on the outer divided operation shaft side and formed on the outer divided operation shaft side, the outer peripheral surface of the connecting portion located on the radially outer side is the operation axis direction applied to the outer divided operation shaft A mounting surface for clamping is formed to clamp and fix the receiving part that receives the moving force to
Both split operating shaft of the first inner and outer side provided with the flow path blocking means is slidably disposed through the top plate portion of the working casing, forcing the two half operating shaft of the inner and outer side of the working casing The forcible feeding means for feeding into the gripping portion is clamped between the work case and the receiving portion clamped and fixed on the clamping mounting surface on the first outer divided operation shaft side, or on the clamping mounting surface on the outer divided manipulation shaft side connected to and connected thereto while sequentially replaced over the fixed receiver, the forced feeding means operates the first th inner and outer both split operation shaft and two half operating shaft of the inner and outer side coupled replenishment thereto relative to said work casing The method for renewing the on-off valve of the fluid piping system is characterized by sequentially forcibly feeding the fluid. A cylindrical outer operation shaft that can be inserted into the branch pipe section through an on-off valve connected to the branch pipe section of the fluid pipe and a work case attached thereto, and is slidably inserted in the axial direction with respect to this. A retaining position that is switched to a position that can be engaged with the upstream portion of the flow path blocking position in the branch pipe portion by the first relative movement operation of the two operating shafts at one end portion of the inner operating shaft. The fluid pipe is provided with a flow path blocking device provided with a locking means and a flow path blocking means that can be switched to a state in which the flow path in the branch pipe section is blocked by a second relative movement operation of the two operation shafts. An on-off valve updating method for a fluid piping system in which the on-off valve is updated after the flow path in the branch pipe portion is shut off while maintaining fluid transportation at
Constructed from the passage of each of the outer operating shaft and the inner operating shaft of the shut-off device is divided into a plurality in operation the axial direction of the outer split operation shaft and inner split operation axis, adjacent ends of the outer split operation shaft and Each of the adjacent end portions of the inner divided operation shaft is formed with a connection portion that is detachably connected to each other from the operation axis direction,
Of the connecting portions that form a pair on the outer divided operation shaft side, the inner peripheral surface of the connecting portion located on the radially inner side is a guide surface that guides the relative movement of the inner divided operation shaft in the axial direction. Of the connecting portions formed on the outer divided operation shaft side and formed on the outer divided operation shaft side, the outer peripheral surface of the connecting portion located on the radially outer side is the operation axis direction applied to the outer divided operation shaft A mounting surface for clamping is formed to clamp and fix the receiving part that receives the moving force to
Wherein both split operation shaft of the retaining locking means and the first inner and outer side provided with a passage interrupting means slidably disposed through the top plate portion of the working casing, both internal and external side of the working casing Forced feeding means for forcibly feeding the split operation shaft is provided on the outer split operation shaft side connected to the work case and the first mounting portion on the first outer split operation shaft side. The forcible feeding means is operated while sequentially changing over the receiving portion clamped and fixed to the clamping mounting surface, and the first inner and outer divided operation shafts and the first and second split operation shafts are sequentially added and connected to the work case. An on-off valve of a fluid piping system forcibly feeding the inner and outer split operation shafts to a state where a receiving part clamped and fixed to the clamping mounting surface comes into contact with a top plate part of the work case Update method. A shaft coupling portion that is detachably fixedly connected to one end portion of the outer divided operation shaft and one end portion of the inner divided operation shaft that protrudes outside the top plate portion of the work case is fixed to the receiving portion and the receiving portion. A generally T-shaped shaft coupling member that is coupled and screwed and fixed to the coupling portion of the inner divided operation shaft,
The forced feeding means, said receiving portion and said working case-off valve update method of the fluid piping system of claim 6, wherein provided over the shaft coupling portion.

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