JP2009250388A - Connecting structure for pipe with pipe laying apparatus and pipe laying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting structure for a pipe with a pipe laying apparatus capable of enhancing the easiness to execute the operations and also the anti-seismic performance. <P>SOLUTION: A spigot 43 of a gate valve is inserted into a socket 36 of the pipe 32, where a spigot projection 46 is formed on the peripheral surface of the spigot 43, on which 43 a push ring 48 for hindering it 43 from slipping off from the socket 36 is fitted externally and coupled fast with the socket 36 by bolt(s) 49, and a slipoff preventive projection 57 is formed on the push ring 48. The spigot projection 46 is engaged with the slipoff preventive projection 57 about the drawn-out direction B of the spigot 43, while the push ring 48 is furnished with a notch 61 to admit passage of the spigot projection 46 through the slipoff preventive projection 57 in the pipe axis 31a direction, and in case the spigot projection 46 and the notch 61 are positioned identical in the circumferential direction, the spigot projection 46 can pass through the slipoff preventive projection 57. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a connection structure between a pipe body and a pipe laying apparatus in which an insertion opening is provided in one of the pipe and a pipe laying apparatus such as a valve and a receiving opening is provided in the other, and a pipe The present invention relates to a body laying device.

  Conventionally, as this type of connection structure, for example, as shown in FIGS. 16 and 17, there is a connection structure between a pipe body 11 such as a cast iron pipe and a gate valve 12 which is an example of a pipe body laying device. A straight tubular insertion port 13 is provided on the inlet side of the gate valve 12, and a receiving port 14 is provided at one end of the tube body 11. The insertion opening 13 is inserted into the receiving opening 14, and a space between the outer peripheral surface of the insertion opening 13 and the inner peripheral surface of the receiving opening 14 is sealed with an annular rubber seal ring 15.

  A push ring 16 that presses and compresses the seal ring 15 to the back of the receiving opening 14 is fitted on the insertion opening 13. The pusher wheel 16 is connected and fixed to the opening end of the receiving port 14 by connecting means 17 including a plurality of bolts and nuts 18 and 19. Concave portions 20 are formed at a plurality of locations at equal intervals in the circumferential direction on the inner peripheral surface of the press wheel 16.

  A retaining member 21 is provided in each recess 20, and a biting protrusion 22 that bites into the outer peripheral surface of the insertion opening 13 is formed on the retaining member 21. A plurality of pressing bolts 23 that press the respective retaining members 21 inward in the pipe radial direction are screwed to the pusher wheel 16.

  According to this, when the pressing bolt 23 is tightened, the retaining member 21 is pressed inward in the pipe diameter direction, and the biting protrusion 22 bites into the outer peripheral surface of the insertion opening 13. When the gate valve 12 is fully closed, a pulling force F is generated at the insertion port 13 due to water pressure from the inlet side acting on the valve body. Even in such a case, since the biting protrusion 22 of each retaining member 21 bites into the outer peripheral surface of the insertion opening 13 as described above, it is possible to prevent the insertion opening 13 from being removed from the receiving opening 14. This ensures seismic performance.

The connection structure as described above is described in, for example, Patent Document 1 below.
JP 2004-138234 A

  However, in the above conventional type, the frictional force between the retaining member 21 and the outer peripheral surface of the insertion opening 13 prevents the insertion opening 13 from being pulled out from the receiving opening 14, so that there is a problem that the earthquake resistance is low. is there. Furthermore, since it is necessary to tighten the plurality of pressing bolts 23 when the insertion port 13 is inserted into the receiving port 14 and connected, it is necessary to manage the tightening operation of the pressing bolts 23 and tightening torque. There is a problem that it takes time and effort.

  An object of this invention is to provide the connection structure of a pipe body and a pipe-laying apparatus, and a pipe-laying apparatus which workability improves and a seismic performance improves.

In order to achieve the above object, the first invention is a connection structure between a pipe body and a pipe laying device connected to the pipe body,
An insertion port is provided in one of the tube body and the tube laying device and a receiving port is provided in the other,
The insertion is inserted into the receptacle,
On the outer peripheral surface of the insertion port at the outside away from the receiving port in the tube axis direction, an insertion projection projecting radially outward is formed,
A retaining member for preventing the insertion port from being removed from the receiving port is externally fitted to the insertion port and connected to a connecting portion provided on the retaining member and a connecting portion provided on the receiving port. Are connected and fixed by members,
A drawing protrusion that protrudes radially inward is formed on the drawing member,
The insertion projection is located on the receiving side from the extraction projection, and engages with the extraction projection in the drawing direction of the insertion port,
The retaining member is formed with a passage allowing portion that allows the insertion projection to pass through the retaining projection in the tube axis direction,
When the position of the insertion projection and the position of the passage allowing portion coincide with each other in the circumferential direction of the tube body, the insertion projection can pass through the retaining projection in the tube axis direction,
When the position of the insertion projection and the position of the passage allowing portion are shifted in the circumferential direction of the tube body, the insertion projection is configured not to pass through the retaining projection in the tube axis direction. It is.

  According to this, when connecting the insertion port and the receiving port, the insertion port is inserted into the retaining member, and the position of the insertion projection and the position of the passage allowing portion of the retaining member coincide in the circumferential direction of the tubular body. The insertion protrusion is allowed to pass from the drawing direction side of the passage allowing part to the insertion direction side, and is positioned closer to the receiving side than the retaining protrusion. After that, if the position of the insertion protrusion and the position of the passage allowing portion are shifted in the circumferential direction of the tubular body, the insertion opening is inserted into the receiving port in this state, and the retaining member is connected and fixed to the receiving port by the connecting member Good.

  When a pulling force (thrust force) is generated with the insertion port and the receiving port connected, the insertion port protrudes from the receiving port because the insertion port engages with the retaining projection in the pulling direction of the insertion port. It can be prevented from being pulled out.

  As described above, in the connection structure of the present invention, it is not necessary to use a plurality of pressing bolts that press the retaining member instead of retaining the retaining member due to the frictional force between the retaining member and the insertion opening as in the prior art. This eliminates the need for troublesome work and tightening torque management, improves workability, and improves seismic performance.

In the second invention, the insertion port is provided in the pipe laying device,
When the retaining member is connected and fixed to the receiving port with the connecting member at the normal position where the tube laying device and the tube are used, the position of the insertion protrusion is the circumference of the tube relative to the position of the passage allowing portion. It is configured to be displaced in the direction.

According to this, the retaining member can be connected and fixed to the receiving port by the connecting member in a state where the tube laying apparatus is definitely in the normal position.
Further, according to the third aspect of the present invention, at least one of the connecting portion of the retaining member and the connecting portion of the receiving port has an adjustment function capable of adjusting the connecting position of the retaining member and the receiving port in the circumferential direction of the tubular body. It is what you have.

  According to this, when connecting and fixing the retaining member to the receiving port with the connecting member, the position of the retaining member relative to the receiving port can be adjusted in the circumferential direction of the tubular body. Thereby, even if the receiving port is displaced in the circumferential direction of the tubular body with respect to the insertion port, the retaining member can be accurately positioned at the engagement position where the retaining projection and the insertion projection are engaged. it can.

  Further, according to the fourth aspect of the present invention, when the insertion protrusion is engaged with the retaining protrusion in the drawing direction of the insertion opening, the insertion protrusion and the retaining protrusion are engaged in the circumferential direction of the insertion opening. The engaging means to be provided is provided on either the insertion projection or the retaining projection.

  According to this, it is possible to prevent the insertion port from rotating in the circumferential direction with respect to the receiving port by engaging the retaining projection and the insertion port projection by the engaging means in the circumferential direction of the insertion port. . As a result, it is possible to prevent the insertion opening from rotating due to vibrations such as an earthquake and the like so that the position of the insertion protrusion coincides with the position of the passage allowing portion in a state where the insertion opening and the receiving opening are connected. it can. Thereby, it is possible to prevent the insertion opening from being accidentally detached from the reception opening.

Moreover, this 5th invention is a pipe | tube laying apparatus connected by the connection structure of any one of the said 1st invention to the 4th invention,
The pipe laying device is a valve,
An opening is provided in the valve box of the valve,
The whole surface of the valve box is powder coated.

  According to this, the anticorrosion paint was conventionally applied by using a brush, but the anticorrosion effect is improved in the powder coating as compared with the brush coating because the coating film is thick and the adhesion to the background is large. In addition, when the insertion port is connected to the receiving port, the insertion port protrusion is prevented from being separated by engaging with the retaining projection, so that the retaining member is pressed against the outer peripheral surface of the insertion port as in the past. It is not necessary to bite the outer peripheral surface of the insertion hole. Thereby, peeling of the coating film of the valve box insertion opening can be prevented.

  As described above, according to the present invention, when a pulling force is generated in a state where the insertion port and the receiving port are connected, the insertion port protrusion is engaged with the retaining projection in the pulling direction of the insertion port. Can be prevented from being removed from the receptacle.

  As described above, the connection structure of the present invention eliminates the need for a plurality of pressing bolts that press the retaining member as in the prior art, thereby eliminating the work of tightening the pressing bolts and managing the tightening torque and improving workability. In addition, seismic performance is improved.

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, reference numeral 31 denotes a pipe line, and the pipe line 31 includes a plurality of pipe bodies 32 and a gate valve 33 (an example of a pipe body laying device) connected to the pipe body 32. The pipe body 32 is a cylindrical straight pipe made of cast iron, for example, and has a pipe insertion opening 35 at one end and a pipe receiving opening 36 at the other end.

  The gate valve 33 includes a valve box 38, a lid 39 attached to the upper part of the valve box 38, a valve body 40 provided in the valve box 38, and a valve rod 41 provided in the vertical direction. is doing. The valve box 38 has a cylindrical valve insertion port 43 on the inlet side and a valve receiving port 44 on the outlet side.

  The valve insertion opening 43 of the gate valve 33 is inserted into the pipe receiving port 36 of the upstream pipe body 32, the inlet side of the gate valve 33 is connected to the upstream pipe body 32, and the downstream pipe body 32 is connected. The pipe insertion port 35 is inserted into the valve receiving port 44 of the gate valve 33, and the outlet side of the gate valve 33 and the downstream pipe body 32 are connected.

First, the structure of the first connection portion J1 between the valve insertion port 43 and the tube receiving port 36 on the inlet side (upstream side) of the gate valve 33 will be described.
As shown in FIGS. 1 to 3, the valve insertion opening 43 has a cylindrical straight pipe portion 45 provided on the inlet side of the valve box 38. A plurality of insertion projections 46 are formed on the outer peripheral surface of the valve insertion port 43 outside the tube receiving port 36 in the direction of the tube axis 31a. The insertion projections 46 are formed at a plurality of locations at equal intervals in the circumferential direction of the valve insertion port 43.

  An annular seal ring 47 made of rubber that seals between the inner peripheral surface of the opening end of the tube receiving port 36 and the outer peripheral surface of the valve insertion port 43 is fitted over the valve insertion port 43. As shown in FIGS. 1, 2, and 4, the tube receiving port 36 is configured such that the seal ring 47 is pressed to the back of the tube receiving port 36 and the valve insertion port 43 is removed from the tube receiving port 36. A push ring 48 (an example of a retaining member) for blocking is attached. The pusher wheel 48 is externally fitted to the valve insertion port 43 and is connected and fixed to the tube receiving port 36 with a plurality of T-shaped bolts and nuts 49 and 50 (an example of a connecting member).

The tube receiving port 36 has a flange portion 51 on the outer peripheral surface of the opening end portion, and a plurality of bolt holes 52 (an example of a connecting portion) are formed in the flange portion 51.
The push ring 48 includes an annular main body 54, a pressing portion 55 that presses the seal ring 47, a flange portion 56, and a plurality of retaining protrusions 57. The flange portion 56 is formed on the outer periphery of the main body portion 54, and a plurality of bolt holes 58 (an example of a connecting portion) are formed in the flange portion 56. The T-shaped bolt 49 is inserted into the bolt holes 52 and 58, and the nut 50 is screwed into the T-shaped bolt 49.

  The pressing portion 55 is formed at the end portion of the main body portion 54 on the pressing direction A side. The drawing protrusions 57 protrude radially inward from the main body 54 and are formed at a plurality of locations at equal intervals in the circumferential direction at the end of the main body 54 on the drawing direction B side.

  The insertion projection 46 is located between the extraction projection 57 and the tube receiving port 36, and engages with the extraction projection 57 in the extraction direction B of the valve insertion port 43. The pusher wheel 48 is provided with a notch 61 (an example of a passage allowing portion) that allows the insertion projection 46 to pass through the retaining projection 57 in the direction of the tube axis 31a. The notches 61 are formed between the retaining protrusions 57 in the circumferential direction, and the positions of the insertion protrusions 46 and the positions of the notches 61 are equal in the circumferential direction of the tube body 32 as shown in FIG. When doing so, each insertion projection 46 can pass between each retaining projection 57 in the direction of the tube axis 31a.

  Moreover, as shown in FIG. 5, when the position of each insertion protrusion 46 and the position of each notch 61 are shifted in the circumferential direction of the tube body 32, each insertion protrusion 46 is in the direction of the tube axis 31a. Since the abutment comes into contact with each of the retaining protrusions 57, the retaining protrusions 57 cannot pass through.

Next, as shown in FIG. 1, the structure of the 2nd connection part J2 of the valve receiving port 44 and the pipe insertion port 35 in the exit side (downstream side) of the gate valve 33 is demonstrated.
As shown in FIG. 6, a rubber annular seal ring 70 that seals between the inner peripheral surface of the opening end of the valve receiving port 44 and the outer peripheral surface of the tube insertion port 35 is fitted over the tube insertion port 35. Has been. A push ring 71 that presses the seal ring 70 to the back of the valve receiving port 44 is attached to the valve receiving port 44. The pusher wheel 71 is externally fitted to the tube insertion opening 35 and is connected and fixed to the valve receiving port 44 with a plurality of T-shaped bolts and nuts 72 and 73. The structure of the second connecting portion J2 corresponds to the joint structure defined in “Japan Ductile Iron Pipe Association Standard K-type Ductile Cast Iron Pipe JIS G 5526/5527”.

Further, powder coating is applied to the entire inside and outside of the valve box 38 (including the valve insertion opening 43 and the valve receiving opening 44).
Hereinafter, the operation of the above configuration will be described.

About the 1st connection part J1 of the valve insertion port 43 and the pipe receiving port 36 When connecting the valve insertion port 43 and the pipe receiving port 36, the valve insertion port 43 is inserted in the push ring 48 and the seal ring 47, and a push ring As shown in FIG. 4, 48 is rotated in the circumferential direction so that the position of the notch 61 coincides with the position of the insertion projection 46 in the circumferential direction. As a result, the insertion projections 46 can pass through the notches 61, and the insertion projections 46 are passed from the drawing direction B side of each notch 61 to the pushing direction A side in the tube axis 31a direction.

  Thereafter, as shown in FIG. 5, the pusher wheel 48 is rotated by 45 ° (predetermined angle) in the circumferential direction so that the position of the bolt hole 58 of the pusher wheel 48 matches the position of the bolt hole 52 of the tube receiving port 36. Thereby, the position of each notch part 61 shifts in the circumferential direction from the position of each insertion opening protrusion 46, and as shown in FIG. 2, each insertion opening protrusion 46 has each retaining protrusion 57 and pressing part 55. And faces each of the retaining projections 57 in the direction of the tube axis 31a.

  Then, the valve insertion port 43 is inserted into the tube receiving port 36, and the seal ring 47 is fitted between the outer peripheral surface of the valve insertion port 43 and the inner peripheral surface of the opening end of the tube receiving port 36. Thereafter, a T-shaped bolt 49 is inserted into the bolt hole 58 of the push ring 48 and the bolt hole 52 of the tube receiving port 36, and tightened with a nut 50. Thereby, the push ring 48 is connected and fixed to the tube receiving port 36, and the valve insertion port 43 of the gate valve 41 and the tube receiving port 36 of the tube body 32 are connected.

  When the gate valve 41 is fully closed and the flow path in the valve box 38 is shut off, a pulling force (force in the pulling direction B) acts on the valve insertion port 43 by water pressure from the inlet side acting on the valve body 40. In this way, when the pulling force is applied, each insertion protrusion 46 comes into surface contact with each retaining protrusion 57 and engages with each retaining protrusion 57 in the pulling direction B. Thereby, it is possible to prevent the valve insertion port 43 from being detached from the tube receiving port 36.

  Therefore, since it is not a retaining by the frictional force between the retaining member and the insertion opening as in the prior art, the earthquake resistance performance is greatly improved, and moreover, a plurality of pressing bolts that press the retaining member are not required. This saves the trouble of tightening work and tightening torque management and improves workability.

  Further, since the powder coating is applied to the entire inside and outside of the valve box 38, the corrosion resistance of the valve box 38 is improved. Further, it is not necessary to press the retaining member against the outer peripheral surface of the insertion opening as in the prior art, so that the biting protrusion does not bite into the outer peripheral surface of the insertion opening, thereby preventing the coating film from peeling off the valve insertion opening 43 of the valve box 38. And corrosion resistance can be improved.

  Moreover, as shown in FIG. 1, the gate valve 33 is used in the regular position C where the valve rod 41 becomes the up-down direction. When the gate valve 33 is set to the normal position C as described above, and the presser wheel 48 is connected and fixed to the tube receiving port 36 with a T-shaped bolt 49 and a nut 50 as shown in FIG. The position of the insertion projection 46 is configured to be shifted in the circumferential direction of the tubular body 32 with respect to the position of each notch 61.

Accordingly, the pusher wheel 48 can be connected and fixed to the tube receiving port 36 by the T-shaped bolt 49 and the nut 50 in a state where the gate valve 33 is definitely in the normal position C.
Moreover, although the said pipe body 32 is a straight pipe, it is not limited to a straight pipe, A curved pipe may be arrange | positioned horizontally. For this reason, the normal position in the circumferential direction when using the pipe body 32 is determined, and the normal position is set by the mark provided on the outer surface of the pipe body 32 or the bolt hole 52 of the flange portion 51. The pipe body 32 is laid and constructed.

  Thus, like the gate valve 33, the pusher wheel 48 can be connected and fixed to the tube receiving port 36 by the T-shaped bolt 49 and the nut 50 in a state where the tube body 32 is definitely in the normal position.

In the first embodiment, the insertion port 43 is provided in the gate valve 33 and the receiving port 36 is provided in the tube body 32. However, the receiving port 36 is provided in the gate valve 33 and the insertion port 43 is provided in the tube body 32. May be provided.
Next, a second embodiment of the present invention will be described with reference to FIGS.

  Each bolt hole 58 of the pusher wheel 48 has a long hole shape that is long in the circumferential direction. Thereby, each said bolt hole 58 has an adjustment function which can adjust the connection position of the push ring 48 and the pipe socket 36 in the circumferential direction.

Hereinafter, the operation of the above configuration will be described.
When the presser wheel 48 is connected and fixed to the tube receiving port 36 with the T-shaped bolt 49 and the nut 50, the position of the presser wheel 48 with respect to the tube receiving port 36 is changed within the range of the long diameter of the bolt hole 58, thereby Can be adjusted. Thereby, even if the pipe receiving port 36 is displaced in the circumferential direction with respect to the valve insertion port 43, the position of the push ring 48 is adjusted so that the retaining projection 57 and the insertion projection 46 are accurately engaged. be able to.

In the second embodiment, each bolt hole 58 of the pusher wheel 48 has a long hole shape, but each bolt hole 52 (see FIG. 2) of the tube receiving port 36 may have a long hole shape.
Next, a third embodiment of the present invention will be described with reference to FIGS.

As shown in FIGS. 9 and 10, a pair of engaging pieces 76 (an example of engaging means) protruding in the pulling direction B are provided at both ends in the circumferential direction of each insertion protrusion 46.
As shown in FIGS. 9, 12, and 13, when the gate valve 33 and the pipe body 32 are used, the insertion projections 46 are removed in the drawing direction B of the valve insertion port 43. At this time, the retaining projections 57 are fitted between the pair of engaging pieces 76, and the insertion projecting projections 46 and the retaining projections 57 are engaged by the engaging pieces 76 in the circumferential direction. opposite. For this reason, it is possible to prevent the valve insertion port 43 from rotating in the circumferential direction with respect to the tube receiving port 36.

  Therefore, in a state where the valve insertion opening 43 and the pipe receiving opening 36 are connected, the valve insertion opening 43 rotates due to vibrations such as an earthquake, and the position of the insertion protrusion 46 matches the position of the notch 61. Therefore, the valve insertion port 43 can be prevented from being carelessly detached from the tube receiving port 36.

  In the third embodiment, as shown in FIG. 9, when the valve insertion port 43 is inserted into the tube receiving port 36 and the valve insertion port 43 and the tube receiving port 36 are connected, As shown in FIG. 14, when the valve insertion port 43 and the tube receiving port 36 are connected as shown in FIG. 14, the insertion projection 46 and the extraction projection are brought into contact with the extraction projection 57. A gap 78 may be formed between the portion 57.

In the third and fourth embodiments, the engagement piece 76 is provided in the insertion protrusion 46, but may be provided in the retaining protrusion 57.
Next, a fifth embodiment of the present invention will be described with reference to FIG.

The retaining projection 57 has a circular cross section. Further, the insertion projection 46 has a semicircular cross section, and a pair of engagement portions 80 (an example of engagement means) are provided at both ends.
According to this, when the gate valve 32 and the pipe body 32 are in a position where they are used, each insertion projection 46 faces each retention projection 57 in the drawing direction B of the valve insertion port 43. The retaining projections 57 are fitted between the pair of engaging portions 80, and the insertion projecting portions 46 and the retaining projections 57 are opposed to each other by the engaging portions 80 in the circumferential direction. For this reason, it is possible to prevent the valve insertion port 43 from rotating in the circumferential direction with respect to the tube receiving port 36.

  In the fifth embodiment, when the valve insertion port 43 is inserted into the tube receiving port 36 and the valve insertion port 43 and the tube receiving port 36 are connected, the insertion projection 46 and the retaining projection 57 are connected. A gap 78 is formed between the two, but the gap 78 may be eliminated.

  In each of the above embodiments, the structure of the second connection portion J2 between the valve receiving port 44 and the pipe insertion port 35 on the downstream side of the gate valve 33 (see FIG. 6) is the valve insertion port on the upstream side of the gate valve 33. 43 and the structure of the first connection portion J1 between the pipe receiving port 36 (see FIG. 2), but may be the same as the structure of the first connection portion J1.

  In each of the above embodiments, as shown in FIG. 1, the gate valve 33 has the valve insertion port 43 on the inlet side and the valve receiving port 44 on the outlet side, but the valve receiving port 44 on the inlet side. And a valve insertion opening 43 on the outlet side. The tube body 32 has a tube insertion opening 35 at one end and a tube receiving opening 36 at the other end, but has a tube receiving opening 36 at one end and the tube insertion opening 35 at the other end. You may have.

  In each of the above-described embodiments, the gate valve 33 is used as an example of the pipe laying device. However, the gate valve 33 is not limited to the gate valve 33, and other types of valves or devices other than valves, such as pumps and branch pipes, are used. But you can.

  In each of the above embodiments, as shown in FIGS. 3, 4, 8, 10, and 11, the insertion protrusion 46, the retaining protrusion 57, and the notch 61 are each 90 ° in the circumferential direction. However, it is not limited to four places, and only one place or a plurality of places other than the four places may be provided.

It is a side view of a tubular body and a gate valve connected to the tubular body in the first embodiment of the present invention. It is sectional drawing of the 1st connection part of a pipe body and the entrance side of a gate valve equally. It is sectional drawing of the valve insertion opening of the 1st connection part same as the above. It is a front view of the push ring of the 1st connection part same as the above. FIG. 3 is an XX arrow view in FIG. 2. It is sectional drawing of the 2nd connection part of a pipe body and the exit side of a gate valve equally. It is a front view of the push ring of the 1st connection part of the pipe body in the 2nd Embodiment of this invention and the inlet side of a gate valve. It is sectional drawing of the 1st connection part same as the above. It is sectional drawing of the pipe receiving port and push ring of the 1st connection part of the pipe body in the 3rd Embodiment of this invention, and the inlet side of a gate valve. It is sectional drawing of the valve insertion opening of the 1st connection part same as the above. It is a front view of the push ring of the 1st connection part same as the above. It is sectional drawing of the 1st connection part same as the above. It is a XX arrow line view in FIG. It is sectional drawing of the pipe receiving port and push ring of the 1st connection part of the pipe body in the 4th Embodiment of this invention, and the inlet side of a gate valve. It is sectional drawing of the pipe receiving port and push ring of the 1st connection part of the pipe body and inlet side of a gate valve in the 5th Embodiment of this invention. It is sectional drawing of the connection part of the conventional pipe body and the inlet side of a gate valve. It is a XX arrow line view in FIG.

Explanation of symbols

31a Pipe shaft 32 Pipe body 33 Gate valve (pipe body laying device)
36 Tube receiving port 38 Valve box 43 Valve insertion port 46 Insertion protrusion 48 Push ring (extraction member)
49 Bolt (connecting member)
50 Nut (connection member)
52 Bolt hole (connecting part)
57 Extraction protrusion 58 Bolt hole (connection part)
61 Notch (passable part)
76 engagement piece (engagement means)
80 Engagement part (engagement means)
B Pull-out direction C Regular direction

Claims (5)

A connection structure between a pipe body and a pipe laying device connected to the pipe body,
An insertion port is provided in one of the tube body and the tube laying device and a receiving port is provided in the other,
The insertion is inserted into the receptacle,
On the outer peripheral surface of the insertion port at the outside away from the receiving port in the tube axis direction, an insertion projection projecting radially outward is formed,
A retaining member for preventing the insertion port from being removed from the receiving port is externally fitted to the insertion port and connected to a connecting portion provided on the retaining member and a connecting portion provided on the receiving port. Are connected and fixed by members,
A drawing protrusion that protrudes radially inward is formed on the drawing member,
The insertion projection is located on the receiving side from the extraction projection, and engages with the extraction projection in the drawing direction of the insertion port,
The retaining member is formed with a passage allowing portion that allows the insertion projection to pass through the retaining projection in the tube axis direction,
When the position of the insertion projection and the position of the passage allowing portion coincide with each other in the circumferential direction of the tube body, the insertion projection can pass through the retaining projection in the tube axis direction,
When the position of the insertion projection and the position of the passage allowing portion are shifted in the circumferential direction of the tube body, the insertion projection is configured not to pass through the retaining projection in the tube axis direction. A connection structure between a tubular body and a tubular body laying device. An insertion opening is provided in the tube laying device,
When the retaining member is connected and fixed to the receiving port with the connecting member at the normal position where the tube laying device and the tube are used, the position of the insertion protrusion is the circumference of the tube relative to the position of the passage allowing portion. The connection structure between a pipe body and a pipe body laying device according to claim 1, wherein the pipe body and the pipe body laying device are configured to be displaced in a direction. At least one of the connecting portion of the retaining member and the connecting portion of the receiving port has an adjustment function capable of adjusting the connecting position of the retaining member and the receiving port in the circumferential direction of the tubular body, A connection structure between the pipe body and the pipe body laying device according to claim 1 or 2. When the insertion projection is engaged with the retaining projection in the drawing direction of the insertion slot, an engaging means for engaging the insertion projection and the retention projection in the circumferential direction of the insertion slot is the insertion projection. The connection structure between a pipe body and a pipe body laying device according to any one of claims 1 to 3, wherein the pipe body and the pipe laying apparatus are provided on either the first part or the retaining projection part. A pipe laying device connected by the connection structure according to any one of claims 1 to 4,
The pipe laying device is a valve,
There is a slot in the valve box,
A pipe laying device characterized in that powder coating is applied to the entire surface of the valve box.

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