JP6396140B2 - Valve body mounting structure - Google Patents

Description

The present invention relates to a valve body mounting structure for mounting a valve body in a casing that encloses a fluid pipe in a sealed manner and in which the fluid pipe is cut in an uninterrupted state .

  Conventionally, when a fluid pipe is cut in an uninterrupted state in a case body (housing) that encloses the fluid pipe in a sealed state, and a lid (installation body) is attached to the opening of the housing, a fluid force acts. In a state where the lid is temporarily fixed with the temporary fixing member, the fixing member is inserted into the groove formed in the opening of the housing to fix the lid, and then the temporary fixing means is removed (for example, a patent Reference 1).

Japanese Patent No. 4325768 (5th page, FIGS. 1 to 4)

  In Patent Document 1, since the lid attached to the housing is a simple lid and has a simple configuration, a sufficient space for inserting the fixing member into the groove formed in the opening of the housing is secured. I was able to work in the state. However, when the installation body is a valve device, since the packing box is formed on the valve lid, the space of the opening of the housing is narrow, and a sufficient space for inserting the fixing member into the groove is ensured. I couldn't. For this reason, it becomes difficult to insert the fixing member, and it takes a long time to insert the fixing member.

  The present invention has been made paying attention to such a problem, and even if the work space in the housing is narrow and sufficient space for inserting the fixing member into the groove portion cannot be secured, the fixing is performed. It is an object of the present invention to provide an installation body mounting structure in which a member can be easily inserted and work time for installing the installation body can be shortened.

In order to solve the above problems, the valve body mounting structure of the present invention is:
A valve body mounting structure for mounting a valve body in the casing in which the fluid pipe is cut off in an uninterrupted flow state in a casing surrounding the fluid pipe in a sealed manner, and the valve body closes the casing opening. An opening closing member, and a fixing member attached across the opening closing member and the housing,
The valve body mounting structure includes a guiding unit that guides the fixing member in a forward / backward direction with respect to the housing, and the guiding unit includes a recess formed in a part of the circumferential direction of the housing opening , The recess has an inner wall that restricts movement of the valve body in the circumferential direction by engaging with the side wall of the fixing member.
According to this feature, it is possible to easily attach the fixing member so as to straddle the casing and the opening closing member of the valve body by using the guiding means for guiding the fixing member in the advancing / retreating direction with respect to the casing. As a result, the valve body can be attached in a short time.

Before SL guide means is characterized in that it comprises a groove portion formed in the opening closing member.
According to this feature, since the fixing member can be guided along the groove formed in the opening closing member, it is easy to straddle the fixing member between the opening of the housing and the opening closing member. Can be installed on.

The concave portion is opposed to the groove portion.
According to this feature, the movement of the valve main body in the circumferential direction can also be restricted by the fixing member attached so as to straddle the groove and the recess formed in the housing opening facing the groove.

Before SL guide means is in the long hole formed in the moving direction of the fixing member, a guide member provided in the opening closure member to induce the long hole, characterized in that it comprises a.
According to this feature, since the elongated hole formed in the advancing / retreating direction of the fixing member is guided by the guide member formed in the opening closing member, the fixing member is connected to the opening of the housing, the valve body, and the like. It can be easily installed so as to straddle.

Before SL guide means is characterized in that it comprises a support for supporting the jig for advancing and retracting the fixing member.
According to this feature, the fixing means can be easily moved using the support portion that supports the jig for moving the fixing member.

It is a partial front sectional view which shows the state which installed the fluid pipe | tube cutting device in the housing | casing attached to the existing fluid pipe | tube. It is a partial cross section figure of A arrow of FIG. It is a partial front sectional view which shows the state which installed the valve main body in the housing | casing by the valve main body insertion apparatus. (A) is a BB arrow line view of Drawing 3, and is a figure showing the state where a valve lid was temporarily fixed with a presser screw, and (b) is a figure showing the state where temporary fixing of a presser screw was canceled. It is a partial front sectional view which shows the process of installing a valve main body in a housing | casing and inserting a fixing member in a recessed part. (A) is a top view which shows the state which inserted the fixing member in the housing | casing recessed part, (b) is a partial front sectional view. It is a figure which shows the process of attaching an upper cover to a flange part. (A) is a top view which shows the state which attached the upper cover to the flange part, and completed the installation body attachment process, (b) is a partial front sectional view. (A) is an enlarged part of dotted line enclosing part C of Drawing 6, and is a figure showing the state before inserting a fixing member into a crevice, and (b) is a figure showing the state where a fixing member was inserted in a crevice similarly. . (A) is a top view which shows the modification which applied the installation body attachment structure of this invention to the switching valve, (b) is a partial front sectional view.

  The installation body mounting structure according to the first embodiment will be described with reference to FIGS. 1 to 10.

  As shown in FIGS. 1 to 3, the installation body mounting structure 1 of the present embodiment includes an existing fluid pipe 2 as a fluid pipe, and a housing attached to the outer peripheral surface of the existing fluid pipe 2 to seal the existing fluid pipe 2. A body 4, a valve main body 5 as an installation body installed in the housing 4, and removal prevention metal fittings 6 and 6 that prevent the existing fluid pipe 2 from being detached are provided.

  Here, the existing fluid pipe 2 is made of, for example, ductile cast iron for waterworks buried in the ground, is formed in a substantially circular shape in cross section, and has an inner peripheral surface covered with an epoxy resin layer. The fluid pipe according to the present invention may be made of metal such as cast iron or steel, or asbestos, concrete, vinyl chloride, polyethylene, or polyolefin. Furthermore, the inner peripheral surface of the fluid pipe is not limited to the epoxy resin layer, and may be coated with, for example, mortar or the like, or an appropriate material may be coated on the inner peripheral surface of the fluid pipe with powder coating. In this embodiment, the fluid in the fluid pipe is clean water, but is not limited to clean water in this embodiment. For example, in addition to industrial water, agricultural water, sewage, etc., gas or gas-liquid mixture of gas and liquid It does not matter. Further, the material of the housing 4 and the valve body 5 may be adapted to the above.

  As shown in FIG. 3 and FIG. 4, the valve body 5 includes a valve lid 5a, a valve seat body 5b, a valve body 5v movable within the valve seat body 5b, and a valve operation connected to the upper portion of the valve body 5v. A packing box 5h is provided for storing a packing for sealing the shaft 5j and the valve operating shaft 5j. The valve seat body 5b and the housing 4 are sealed by a sealing member 5e. Then, by rotating the valve operating shaft 5j, the valve body 5v can be moved, and the flow of the existing fluid pipe 2 can be controlled by opening and closing the hole 5f provided in the valve seat body 5b.

  As shown in FIG. 1, the housing 4 is a so-called split T-shaped tube, and is divided into a housing upper portion 41 and a housing lower portion 42 in the radial direction (vertical direction in this embodiment) of the existing fluid tube 2. It has a structure.

The housing top 41 neck 41a, a flange portion 41b continuous to該首portion 41a, the housing opening 41 e communicating with the inner housing continues into the flange portion 41b is formed, the end of the further casing opening 41 e The part is formed with a housing recess 41c for inserting and fixing a fixing member 7 to be described later. A fluid pipe cutting device 70, a valve body insertion device 80 (see FIG. 3), and the like can be attached to the flange portion 41b via a fixed flange body 50 and a work valve 60 described later.

  On the other hand, the housing lower part 42 has a bowl-shaped housing bottom 42d, and a discharge hole 42b is formed in the center of the housing bottom 42d. The discharge hole 42b can be connected to a valve 49. As will be described later, chips generated when the existing fluid pipe 2 is cut can be discharged together with fluid from the discharge hole 42b by operating the valve 49. Yes.

  In the present embodiment, the case upper part 41 and the case lower part 42 will be described. However, the division direction of the case is not limited to the top and bottom, and may be, for example, a horizontal direction or a predetermined angle of inclination. The number of divisions may be 3 or more. Similarly, the piping direction of the existing fluid pipe 2 is not limited to the horizontal direction, and may be, for example, the vertical direction. Furthermore, the cutting direction of the cutter 72 described later is not limited to the vertical direction, and may be, for example, a horizontal direction.

  In addition, as shown in FIG. 1, with the casing 4 sealed and attached to the existing fluid pipe 2, the flange portion 41 b of the casing upper portion 41 has a fixed flange body 50, a work valve body 60, and a fluid pipe cutting. A device 70 is attached.

  As shown in FIGS. 1 and 2, a seal member 53 is inserted into a joint surface between the fixed flange portion 51 and the flange portion 41 b of the fixed flange main body 50, and tightened by a bolt and nut 54. The fixed flange portion 51 and the flange portion 41b are sealed. In the radial direction of the fixed flange portion 51, a plurality of press screws 52 are attached in a sealed manner with a predetermined interval in the circumferential direction. When the valve body 5 is inserted into the housing 4 as will be described later. The valve body 5 can be temporarily fixed.

  As shown in FIG. 1, the joint surface between the working valve housing 61 and the fixed flange main body 50 of the work valve main body 60 is inserted with a seal member 63 and tightened by a bolt 55, so that the work valve main body 60 and the fixed flange main body are tightened. 50 is sealed. A work valve 62 that can be opened and closed between the housing 4 and the fluid pipe cutting device 70 by being slid horizontally is attached to the work valve housing 61 of the work valve main body 60 in a sealed manner.

  In addition, a sealing member 73 is inserted in a joint surface between the fluid pipe cutting device 70 and the work valve main body 60 and tightened by a bolt 74, and the fluid pipe cutting device 70 and the work valve main body 60 are sealed. The Further, a cutter 72 attached to the cutter shaft 75 is attached to the punching device casing 71 in a sealing manner so as to be movable up and down and rotatable. The cutter 72 and the cutter shaft 75 can be driven to rotate from the outside of the fluid pipe cutting device 70 by a driving device (not shown).

  Hereinafter, the cutting process of the existing fluid pipe 2 and the installation body attaching process will be described.

  First, the cutting process will be described. As shown in FIG. 1, the existing fluid pipe 2 is cut in an uninterrupted flow state by the cutter 72 with the work valve 62 opened. Since the cutter 72 has a cylindrical shape, the pipe cutting portion of the existing fluid pipe 2 is formed in an arc shape along the cylindrical cutter 72 when viewed from the cutter shaft 75 direction. The chips generated when cutting the existing fluid pipe 2 are operated by operating a valve 49 attached to a discharge hole 42b provided in the center of the lower part 42 of the casing, and discharge the chips together with the fluid.

  After cutting the existing fluid pipe 2, the cutter 72 is raised, the work valve 62 of the work valve housing 61 is closed, and the space between the housing 4 and the fluid pipe cutting device 70 is sealed. Thereafter, the fluid in the fluid pipe cutting device 70 is discharged, the fluid pipe cutting device 70 is removed from the work valve body 60, and the cutting process work for the existing fluid pipe 2 is completed.

  Next, as shown in FIG. 3, the valve body insertion device 80 is attached to the upper portion of the work valve body 60 in a sealed manner. The valve body insertion device 80 includes an insertion device housing 86, an insertion shaft 87, and a holding portion 83 that holds the valve body 5 attached to one end of the insertion shaft 87 by a mounting bolt 88. At the end, a screw portion 89 screwed into the insertion shaft 87 and a handle 90 for rotating the screw portion 89 are provided, and the insertion shaft 87 is moved up and down by rotating the handle 90 so that the valve body 5 Can be inserted into and removed from the housing 4.

  When the handle 90 is pivoted to lower the insertion shaft 87 and the valve body 5 on which the fixing members 7 and 7 are installed is inserted into the housing 4 and installed, as shown in FIG. A presser screw 52 provided on the flange main body 50 is screwed in, and the valve cover inclined surface 5 c formed on the outer periphery of the valve cover 5 a of the valve main body 5 is temporarily fixed by the presser screw 52. Thereafter, the fluid in the valve body insertion device 80 is discharged, the insertion device lid 84 is removed, the mounting bolt 88 that connects the holding portion 83 and the insertion shaft 87 is removed from the working hole 85, and the valve body insertion device 80 is operated. After removing from the valve body 60, the holding part 83 of the valve body insertion device 80 is removed from the valve body 5 (see FIG. 3).

  Next, as shown in FIG. 5, when the valve body insertion device 80 is removed from the work valve body 60, it is fixed in a substantially rectangular shape in plan view in a housing recess 41 c formed in the housing upper portion 41 described later. Install the members 7 and 7. And the fixing member 7 can hold | maintain the fluid force added to the valve lid 5a by attaching the fixing member 7 so that it may straddle the valve lid 5a and the housing | casing recessed part 41c here. At this time, the working valve housing 61b has a small working space due to the presence of the valve box 5h and the like, and the distance from the working valve housing flange 61a of the working valve housing 61 to the fixing member is also small. Since it is far, it is difficult to insert the fixing member. Therefore, the work jig 92 can be inserted between the valve lid 5a and the fixing member 7 so that the fixing member 7 can be inserted into the housing recess 41c. As shown in FIG. 9, the fixing member 7 is provided with a tapered portion 7d, and the work jig 92 can be easily inserted even in a narrow work space. Furthermore, the fixing member 7 is provided with a plurality of holes 7e, 7e. By inserting a work jig (not shown) into the holes 7e and 7e, not only can the fixing member 7 be inserted into the housing recess 41c even if the work space is narrow, but the fixing member 7 can be inserted into the housing recess 41c. Can be easily removed.

  Subsequently, as shown in FIG. 6, the fixing members 7, 7 are locked by a plurality of bolts 7a, 7a. Thereafter, the presser screw 52 is loosened (see FIG. 4B), and the fixed flange body 50 and the work valve body 60 are removed. As described above, the fixing flange main body 50 can be removed, so that the fixing flange main body 50 and the plurality of presser screws 52 provided on the fixing flange main body 50 are left in the housing 4 so that the structure of the installation body does not deteriorate over time. Not only can it be simplified, but the fixed flange main body 50 and the plurality of presser screws 52 that have been removed can be attached to another housing and reused.

  Finally, as shown in FIGS. 7 and 8, the upper lid 43 is attached to the flange portion 41b with bolts and nuts 43b, and the installation process of the installation body is completed. Further, an upper lid convex portion 43 a that holds the fixing member 7 is provided at a position where the upper lid 43 faces the fixing member 7. Since the fixing member 7 is also held by the upper lid convex portion 43a in a state where the upper lid 43 is fastened to the flange portion 41b by the bolt and nut 43b, the pressure received by the fixing member 7 can be reduced. The upper lid 43 is formed with an upper lid convex portion 43c so as to hold not only the fixing member 7 but also the valve lid 5a, but may be omitted.

  Hereinafter, the guiding means of the present invention will be described. As shown in FIG. 5, there is a relatively long distance from the opening of the work valve housing flange 61a to the fixing member 7, and furthermore, the work valve housing interior 61b has a valve box 5h of the valve body 5. The space is narrow and it is often difficult to move the fixing member 7 with a hand. Further, since the fixing member 7 needs to maintain a large fluid pressure acting on the valve lid 5a for a long period of time, the fixing member 7 is formed to be wide and substantially rectangular in a plan view to reduce the pressure received by the fixing member 7. It is desirable. However, if the fixing member 7 is not properly inserted into a predetermined position of the housing recess 41c, only one fixing member 7 out of a plurality of fixing members or a contact between the local portions of the fixing member 7 and the valve lid 5a. Large pressure acts, leading to long-term reliability degradation. Therefore, the present invention provides guiding means for guiding the fixing member in the advancing and retreating direction so that the fixing member 7 is fixed to the predetermined portion of the housing recess 41c even if the work space for inserting the fixing member 7 into the housing recess 41c is narrow. It was made possible to insert it appropriately and easily in position.

  As shown in FIG. 9, the valve lid 5a is formed with a valve lid groove 5k as guiding means. The valve lid groove portion 5k has valve lid groove side wall portions 5m and 5m and a valve lid groove inner wall portion 5n, and the radially outer side of the valve lid 5a is opened. As shown in FIG. 9A, when the fixing member 7 is brought close to the valve lid groove inner wall portion 5n of the valve lid groove portion 5k, the arcuate wall surface 7b of the fixing member 7 protrudes from the outer peripheral portion of the valve lid 5a. Therefore, the valve body 5 can be easily inserted into the housing 4. Further, the fixing member 7 can be freely moved along the valve lid groove side wall portion 5m while being inserted into the valve lid groove portion 5k. The fixing member 7 and the valve lid groove 5k are adjusted so as to contact each other.

  On the other hand, as shown in FIG. 9A, in the state where the valve body 5 is attached to the housing 4, a housing recess 41c is provided on the inner peripheral portion of the housing upper portion 41 facing the valve lid groove portion 5k. It has been. The housing recess 41c is open on the inside in the radial direction, and the opened surface faces the valve lid groove 5k. The width and height of the housing recess 41 c are formed to be substantially the same as or slightly larger than the width and height of the fixing member 7 so that the fixing member 7 can be accommodated. Further, the fixing member 7 and the housing recess 41c are also adjusted so as to contact each other.

  By being configured in this way, even if there is a working space for inserting the fixing member 7 into the housing recess 41c, the fixing member 7 inserted into the valve lid groove portion 5k extends along the valve lid groove side wall portion 5m. Be guided. Therefore, as shown in FIG. 9B, if the fixing member 7 is moved in the valve lid groove 5k, the fixing member 7 is guided to the housing recess 41c, and the fixing member 7 is guided to the valve lid 5a and the housing recess. It can be easily attached so as to straddle 41c. Further, by attaching the fixing member 7 so as to straddle the valve lid 5a and the housing recess 41c, the side wall of the fixing member 7 that has moved in the valve lid groove 5k is engaged with the inner wall 41d of the recess 41c. The movement of the valve body 5 in the circumferential direction can also be restricted.

  5 and 9, the work jig 92 is inserted between the valve lid groove inner wall portion 5n and the fixing member 7, and the valve lid groove inner wall portion 5n is used as a support portion for fixing. The member 7 can be moved to the housing recess 41c side, and the fixing member 7 can be inserted to the housing recess 41c side. In addition, you may utilize the other part of the valve lid 5a, the packing box 5h, etc. as a support part.

  Further, as shown in FIG. 9, the fixing member 7 has a plurality of elongated holes 7c formed in the advancing / retreating direction, so that the elongated holes 7c and the plurality of bolts 7a, 7a (guide members) are used as guiding means. It can also be used. By guiding the fixing member 7 along the bolts 7a inserted through the plurality of elongated holes 7c formed in the advancing and retreating direction of the fixing member 7, the fixing member 7 is connected to the housing concave portion 41c of the housing 4 and the valve body 5. It can be easily installed so as to straddle.

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

In the said Example, the housing | casing recessed part 41c which inserts the fixing member 7 was made into the shape which can control the movement of the circumferential direction of the housing 4 and the valve main body 5 by having the inner wall 41d . In addition, the recessed part of this invention does not need to be a groove | channel with a U-shaped cross section, and if the fixing member 7 can be hold | maintained so that it may not remove from the housing | casing 4, it may be a groove | channel with a reverse L-shaped cross section.

  Moreover, in the said Example, although the installation body was made into the valve apparatus, it is good also as not only this but the switching valve 15 as FIG. 10 shows. The switching valve 15 includes a switching valve main body casing 15a, a valve body 15v that can rotate within the switching valve main body casing 15a, and a valve operating shaft 15s that is connected to an upper portion of the valve body 15v. The valve body 15v can be rotated in the switching valve main body casing 15a by rotating by a driving means (not shown) so that the flow direction of the existing fluid pipe 2 can be switched. Even in such a switching valve 15, by providing the guiding means of the present invention, the fixing member 7 can be easily attached so as to straddle the switching valve 15 and the housing 4 even if the working space is narrow.

  The installation body may be an installation body for installing a rust prevention ring, valves such as a sluice valve, a plug, a butterfly valve, or a pipe connection member. Furthermore, although the cylindrical cutter was used for the cutting, a wire saw or a bite may be used.

1 Installation body mounting structure 2 Existing fluid pipe (fluid pipe)
4 Housing 5 Valve body (installed body)
5a Valve lid (opening closing member)
5k Valve lid groove (guide means, groove)
5n Valve lid groove inner wall (guide means, support part)
7 Fixing member 7a Bolt (guidance means, guide member)
7c Long hole (guidance means)
41c Housing recess (guidance means, recess)
41d inner wall
41e housing opening

Claims (5)

A valve body mounting structure for mounting a valve body in the casing in which the fluid pipe is cut off in an uninterrupted flow state in a casing surrounding the fluid pipe in a sealed manner, and the valve body closes the casing opening. An opening closing member, and a fixing member attached across the opening closing member and the housing,
The valve body mounting structure includes a guiding unit that guides the fixing member in a forward / backward direction with respect to the housing, and the guiding unit includes a recess formed in a part of the circumferential direction of the housing opening , The recess has an inner wall that restricts movement of the valve body in the circumferential direction by engaging with the side wall of the fixing member.   The valve body mounting structure according to claim 1, wherein the guide means includes a groove formed in the opening closing member.   The valve body mounting structure according to claim 2, wherein the concave portion faces the groove portion.   4. The guide means includes a long hole formed in a forward and backward direction of the fixing member, and a guide member provided in the opening closing member that guides the long hole. 5. The valve body mounting structure according to any one of the above.   The valve body mounting structure according to any one of claims 1 to 4, wherein the guide means includes a support portion that supports a jig for advancing and retracting the fixing member.

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