JP6172793B2 - Packing integrated fittings - Google Patents

Description

  The present invention is a pipe member used for pipes, buried pipes, temporary pipes, etc. in various fields such as waterworks, civil engineering, and building facilities, and in particular, an end of a pipe member in which an annular flange is formed on the outer peripheral surface of the end. In connection with the improvement of housing-type pipe joints that connect each other in a butted manner, an annular split packing in which the packing arranged across the two piping members to be connected is split in two in the diametrical direction. The packing and housing are integrated by inserting into the split annular housing, and the piping member can be connected easily and easily in a short time, and it has excellent sealing properties and is attached to the piping member. The present invention relates to a packing-integrated pipe joint that sometimes has little backlash.

  Generally, pipes with hooks are used for pipes, buried pipes, temporary pipes and the like for waterworks and civil engineering works. Examples of the pipe member with a hook include a straight pipe, an elbow, a cheese, and a telescopic pipe.

  The pipe member with the flange is formed by forming an annular flange on the outer peripheral surface of the end of the member, and the two piping members are arranged so that the flanges of the two pipe members to be connected are opposed to each other. The end of the housing is covered with a housing-type pipe joint, and the flange of the piping member is covered with the housing of the pipe joint to prevent it from coming off, and is sealed with an annular packing inside the housing.

  On the other hand, as a pipe joint for connecting the pipe member with the flange, an annular packing is put on the flange portion of the two pipe members arranged in an opposing manner, and this packing is covered with a half annular housing and tightened. A housing-type pipe joint is known in which two pipe members are connected in an airtight state in a butted manner (see, for example, Patent Document 1).

  That is, as shown in FIGS. 17 and 18, the conventional pipe joint includes an annular packing 10 made of rubber and straddling the flanges Pa of two piping members P arranged in an opposing manner, and an annular packing 10. And a half annular housing 11 comprising a semicircular upper housing 11 ′ and a lower housing 11 ″ which are covered with the flange Pa of the piping member P and engaged with the flange Pa of the piping member P; From a connecting pin 12 that rotatably connects one end portions of the housing 11 ′ and the lower housing 11 ″, and a bolt 13a and a nut 13b that fasten and fix the other end portions of the upper housing 11 ′ and the lower housing 11 ″. The upper housing 11 ′ and the lower housing 11 ″ are connected to each other by a connecting pin 12 so that the upper housing 11 ′ can be opened and closed. It has a structure to tighten in fastener 13 and the other end portions of the grayed 11 'and the lower housing 11 ".

Thus, when the two piping members P with the flange Pa are connected to each other using the housing-type pipe joint, the following steps (1) to (5) are performed.
(1) First, after confirming that the packing 10 and the flange portions Pa of the two piping members P are not damaged or dirty, the flange portions Pa of the two piping members P are brought into contact with each other.
(2) Next, the center position (axial center position) of the two piping members P is matched.
(3) Thereafter, the two piping members P to be connected are maintained in a horizontal posture.
(4) Then, the annular packing 10 previously fitted to one piping member P is moved to the abutting portion of the piping member P, and the center position in the width direction of the packing 10 is the flange Pa where the piping member P abuts. The packing 10 is evenly covered on the outer peripheral surfaces of both flange portions Pa so as to be located at the center position (abutment surface of the flange portions Pa).
(5) Finally, a lubricant is applied to the packing 10 and the housing 11, and the upper housing 11 ′ and the lower housing 11 ″ are covered with the flanges Pa that are in contact with the packing 10, and the upper housing 11 ′ and the lower housing 11 are covered. ″ Is fastened and fixed by the fastener 13.

By the way, the connection work of the piping member P with the flange portion Pa using the pipe joint having the above-described structure requires the holding of both the piping members P, and the center position in the width direction of the annular packing 10 is set to the piping member P. Since it must be aligned with the center position of the buttocks Pa (butting surface of the buttocks Pa), it takes a long time to connect and may cause problems such as leakage due to construction mistakes or damage to members. .
This problem is caused by the structure of the pipe joint using the annular packing 10 described above. Specifically, the following problem occurs in the connection work of the piping member P using the conventional pipe joint. Was.

  That is, in the conventional pipe joint, since the annular packing 10 must be evenly covered on both flanges Pa where the piping member P is abutted, if the piping member P is long or heavy, the surface of the ground on which the piping is laid. In the case where the unevenness is large, when the piping member P is abutted in the air, it is very difficult to maintain the states (1) to (3) of the connection procedure described above.

  Moreover, in the conventional pipe joint, since the inner diameter of the annular packing 10 is smaller than the outer diameter of the flange portion Pa of the piping member P, the connection procedure described above is performed with the packing 10 extended and expanded. The operation (4) must be performed, and it is further difficult to perform the operation (4) in the states (1) to (3) of the connection procedure.

  Furthermore, in the conventional pipe joint, while maintaining the state in which the above-described connection procedure (4) has been completed, the above-described connection procedure (5) is performed, and the packing 10 and the butted flange Pa Since the upper housing 11 ′ and the lower housing 11 ″ are covered with each other and both the housings 11 ′ and 11 ″ must be tightened with the fasteners 13, the operation is very difficult. If the state of (4) collapses during the operation of (5), the housing 11 cannot be fastened and fixed, and even if the housing 11 can be fastened and fixed, the packing 10 and the collar part Pa are attached to the housing 11. There is a possibility of biting, which may cause water leakage.

  In addition, in the conventional pipe joint, the annular packing 10 is put on the outer peripheral surfaces of both flange portions Pa of the two pipe members P that are abutted, and the outer peripheral surface of both flange portions Pa and the inner peripheral surface of the annular packing 10. As a result, the following problems occurred.

That is, the piping member P with the flange Pa protrudes outward from the outer peripheral surface of the piping member 10, and the outer peripheral surface of the flange Pa is damaged or small foreign matter (dust) while the piping member is handled. , Sand, dust, etc.)
Therefore, if the worker overlooks the scratches and foreign matters attached to the outer peripheral surface of the flange Pa of the piping member P, or if the scratches and foreign matters attached to the outer peripheral surface of the flange Pa of the piping member P cannot be confirmed visually, Even if the outer peripheral surface of the collar portion Pa is covered with the annular packing 10 and sealed, there is a problem that the sealing performance is greatly impaired.
In particular, when the long piping member P is dragged and carried, the outer peripheral surface of the flange Pa is likely to be damaged or foreign matter, and the above problem becomes more prominent.

Thus, in the conventional pipe joint, since the packing 10 is formed in an annular shape and is separate from the housing 11, there is a problem that connection work of the piping member P is troublesome and cannot be performed in a short time. there were.
Moreover, in the conventional pipe joint, since sealing is performed between the outer peripheral surface of the flange portion Pa of the piping member P and the inner peripheral surface of the annular packing 10 that are likely to be damaged or foreign matter, sealing performance is improved. There was a problem of getting worse.

Japanese Patent Laid-Open No. 2004-1000077

  The present invention has been made in view of such problems, and the object thereof is to enable a simple and easy connection in a short time to connect a piping member having an annular flange on the outer peripheral surface of the end. It is another object of the present invention to provide a packing-integrated pipe joint that is excellent in sealing properties and has little backlash when mounted on a piping member.

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is characterized in that two piping members having annular flanges formed on the outer peripheral surface of the end portion are arranged in an opposing manner, Covered with a split annular housing through an annular split packing with the end split in two in the diametrical direction, and tightened the split housing in the reduced diameter direction to connect the two piping members in a butted manner A packing-integrated pipe joint, wherein the packing-integrated pipe joint is covered with both flange portions of the two facing pipe members and the outer peripheral surface portion of the piping member adjacent to each flange portion, and includes at least two A split annular housing comprising a semicircular upper housing and a lower housing each formed with a groove for inserting packing on the inner peripheral surface facing the outer peripheral surface portion adjacent to each flange of the piping member; Two semicircular packings that are inserted into the packing insertion concave grooves of the upper housing and the lower housing, and are in close contact with the outer peripheral surface portions adjacent to the flanges Pa of the two piping members P facing each other. And the two semicircular packings are formed to have the same shape and the same size. A pair of semicircular arc portions facing the outer peripheral surface of the piping member adjacent to the flanges of the two facing pipe members, and an inner peripheral surface of the pair of arc portions facing the radial direction of the arc portion. The cross-sectional shape that is pressed in close contact with the outer peripheral surface portion adjacent to the flanges of the pair of pipe members that are formed to protrude and face each other is a tapered lip portion, and the outer peripheral surface of the pair of arc portions is an arc portion. Formed along Each of the two semicircular packings is provided with a concave groove and a rectangular parallelepiped tongue formed in a state of being connected to the lip portion at a boundary portion between both ends of the inner peripheral surface of each arc portion and both end surfaces of the arc portion. Both semicircular packings project from both end surfaces of the upper and lower housings when inserted into the packing insertion concave grooves of the upper housing and lower housing, and further, both semicircles It is characterized in that both end surfaces of the cylindrical packing are formed as inclined surfaces that are inclined upward from the outside to the inside .

  The invention of claim 2 of the present invention has a semicircular shape in which both ends accommodating both flange portions of the two pipe members opposed to each other are opened on the inner peripheral surfaces of the semicircular upper housing and the lower housing. A feature is that each of the flange housing recesses is formed, and the inner side surfaces of the flange housing recesses facing each other can be brought into contact with the inner side surfaces of the flange portions of the two pipe members opposed to each other.

According to a third aspect of the present invention , a rectangular frame-shaped packing insertion concave groove is formed around each of the semicircular upper housing and lower housing flange receiving recesses in plan view, The circular packing is characterized by being formed in a square frame shape in plan view and a semicircular arc shape in side view .

The invention according to claim 4 of the present invention relates to either one or both of the upper housing and the lower housing, when both end surfaces of the upper housing and the lower housing are brought into contact with each other on both end surfaces of the mating housing. It is characterized in that a positioning projection for positioning the upper housing and the lower housing is formed protrudingly .

The packing-integrated pipe joint according to claim 1 of the present invention is an annular structure composed of two semicircular packings that are in close contact with the outer peripheral surface portions adjacent to the flanges of the two facing pipe members. Insert the two semi-circular packings into a two-part annular housing consisting of a semi-circular upper housing and a lower housing each formed with a groove for inserting packing, and the packing and housing are integrated. Therefore, when connecting two pipe members, the flanges of the two pipe members are abutted with each other, and the center position (axial position) of both pipe members is aligned so that both pipe members are in a horizontal posture. The work of maintaining and the work of evenly covering the butted butted parts while extending and expanding the packing are not required, and the connection work of the piping members can be performed easily and easily in a short time.
In the packing-integrated pipe joint according to claim 1 of the present invention, two semicircular packings are respectively inserted into the groove insertion concave grooves of the semicircular upper housing and the lower housing, Since the structure is integrated with the housing, when the housing is attached to the butted portion of the piping member, construction mistakes such as packing biting do not occur, and the cause of water leakage is eliminated.
Further, in the packing-integrated pipe joint according to claim 1 of the present invention, the two semicircular packings are respectively inserted into the packing insertion concave grooves of the semicircular upper housing and the lower housing, Since the housing is integrated, when connecting the two piping members, the flanges of the two piping members are inserted into the lower housing, the two piping members are leveled, and the upper housing is connected to the two piping members. Since it is only necessary to tighten the upper housing and lower housing with tightening tools on the heel of the pipe, there is no need to hold long piping members or heavy piping members for a long time, and piping work at uneven work sites or in the air It can be easily connected in a short time even in piping work.
Furthermore, the packing-integrated pipe joint according to claim 1 of the present invention is located at a location facing the outer peripheral surface portion adjacent to the flange portion of the piping member on the inner peripheral surface of the semicircular upper housing and lower housing. Piping members that are difficult to get scratches and foreign matter (dust, sand, dust, etc.) because each groove has a groove for packing insertion, and a semicircular packing is inserted into each groove for inserting packing. Compared with the conventional pipe joint that seals between the outer peripheral surface portion adjacent to the flange portion and the annular split packing, and seals on the outer peripheral surface of the flange portion of the piping member that is easily damaged. Excellent sealing performance.
Furthermore, the packing-integrated pipe joint according to claim 1 of the present invention is located at a location facing the outer peripheral surface portion adjacent to the flange portion of the piping member on the inner peripheral surface of the semicircular upper housing and lower housing. Since the groove for inserting the packing into which the semicircular packing is inserted is formed, the width of the two annular housings is inevitably widened. As a result, the two annular housings are opposed to each other. When mounted on a piping member, rattling is reduced.
Furthermore, in the packing-integrated pipe joint according to claim 1 of the present invention, since the two semicircular packings are formed in the same shape and the same size, the type of mold for creating the packing Therefore, the manufacturing cost can be reduced.
Further, in the packing-integrated pipe joint according to claim 1 of the present invention, when two semicircular packings are respectively inserted into the packing insertion concave grooves of the upper housing and the lower housing, both semicircular shapes are formed. Since both end surfaces of the packing protrude from both end surfaces of the upper housing and the lower housing, both ends of the upper housing and the lower housing of both semicircular packings when the upper housing and the lower housing are tightened and fixed. The portion protruding from the surface is strongly pressed and deformed tightly, and the sealing of the butt portion of both semicircular packings can be performed reliably and satisfactorily.
Further, in the packing-integrated pipe joint according to claim 1 of the present invention, since both end faces of both semicircular packings are formed as inclined surfaces that are inclined upward from the outside to the inside, both semicircular shapes The inner portions of the both end faces of the packing are pressed more strongly than the outer portions, and the airtightness of the butted surfaces of both semicircular packings can be made more reliably and satisfactorily.

The packing-integrated pipe joint according to claims 2 to 4 of the present invention can further exhibit the following excellent effects in addition to the above-described effects.

  That is, the packing-integrated pipe joint according to claim 2 of the present invention has both ends that accommodate both flange portions of the two pipe members opposed to each other on the inner peripheral surfaces of the semicircular upper housing and lower housing. Opened semicircular flange housing recesses are respectively formed, and the inner side surfaces of the flange housing recesses facing each other are in contact with the inner side surfaces of the two pipe members facing each other. For this reason, sealing is also performed between the inner side surface of the flange housing recess and the inner surface of the piping member closer to the inner side, and the sealing performance is excellent.

The packing-integrated pipe joint according to claim 3 of the present invention is formed by forming a rectangular frame-shaped packing insertion concave groove around the flange housing recesses of the semicircular upper housing and the lower housing in plan view. In addition, since the two semicircular packings to be respectively inserted into the respective groove for inserting the packing are formed in a square frame shape in a plan view and in a semicircular arc shape in a side view, It is possible to accurately insert the circular packing into predetermined positions of the upper housing and the lower housing, and to prevent the semicircular packing from being displaced from the upper housing and the lower housing after the insertion. Can do.
Further, in the packing-integrated pipe joint according to claim 3 of the present invention, since the two semicircular packings are formed in a square frame shape in plan view, a material such as a synthetic rubber forming the semicircular packing is used. Less.

In the packing-integrated pipe joint according to claim 4 of the present invention, when both end surfaces of the upper housing and the lower housing are butted against either one or both of the upper housing and the lower housing, Since the positioning protrusions that are locked to both side surfaces of the end portion to position the upper housing and the lower housing are formed to protrude, the upper housing and the lower housing are abutted in a state where they are accurately positioned. As a result, both end faces of the two split packings are also abutted accurately and reliably, and a reliable seal can be achieved.

1 shows a packing-integrated pipe joint according to an embodiment of the present invention, wherein (a) is a side view of the upper housing and the lower housing opened, and (b) is a side view of the upper housing and lower housing closed. FIG. It is a top view of the packing integrated pipe joint in the state which opened the upper housing and the lower housing. It is the sectional view on the AA line of FIG. FIG. 4 is an enlarged sectional view taken along line B-B in FIG. 3. FIG. 4 is an enlarged sectional view taken along the line CC in FIG. 3. It is a top view of the housing of the state which opened the upper housing and the lower housing. It is the DD sectional view taken on the line of FIG. It is a side view of a split packing. It is a front view of a split packing. It is a top view of split packing. It is the EE sectional view taken on the line of FIG. FIG. 10 is a sectional view taken along line FF in FIG. 9. It is the GG sectional view taken on the line of FIG. It is a top view of the state which showed the connection procedure of the piping member using a packing integral type pipe joint, and inserted the collar part of the two piping members to connect in the collar part accommodating recessed part of a lower housing. It is a side view of the state which covered the upper housing on the collar part of two piping members, and was fastened and fixed with the clamp. It is the HH sectional view taken on the line of FIG. It is a partially cutaway perspective view of the state which connects two piping members using the conventional pipe joint. It is a perspective view of the conventional pipe joint (a packing is abbreviate | omitted).

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 5 show a packing-integrated pipe joint according to an embodiment of the present invention. The packing-integrated pipe joint is a piping member P used for piping for waterworks or civil engineering, buried piping, temporary piping, or the like. In particular, two pipe members P (for example, straight pipes, elbows, cheeses, expansion pipes, etc.) having an annular flange Pa formed on the outer peripheral surface of the end are connected in a butted manner, An annular split packing 2 in which the packing disposed over the piping member P is divided in two in the diametrical direction, and the split packing 2 is inserted into an annular housing 1 that is also divided in two in the diametrical direction to install the packing 2 and the housing. 1 and the piping member P can be connected easily and easily in a short time, the sealing performance can be improved, and the backlash is reduced when it is attached to the piping member. Those were Unishi.

  That is, as shown in FIGS. 1 to 5, the packing-integrated pipe joint covers both the flange portions Pa of the two facing pipe members P and the outer peripheral surface portion of the pipe member P adjacent to each flange portion Pa. A semicircular upper housing 1 ′ and a lower housing 1, each of which is formed with a groove 1 e for inserting a packing on the inner peripheral surface thereof facing the outer peripheral surface portion adjacent to each flange Pa of the at least two piping members P. Adjacent to the flanges Pa of the two piping members P that are respectively inserted into the packing insertion concave grooves 1e of the upper annular housing 1 and the upper housing 1 'and the lower housing 1 ". An annular split packing 2 made up of two semicircular packings 2 'that are in close contact with the outer peripheral surface portion, and a connecting pin that rotatably connects one end of the upper housing 1' and the lower housing 1 " When, and a fastener 4 for fastening and fixing the other ends of the upper housing 1 'and the lower housing 1 ".

The upper housing 1 ′ and the lower housing 1 ″ forming the annular housing 1 are each formed in a semicircular shape from a ferrous material such as stainless steel, a ductile cast iron, a non-ferrous material such as an aluminum alloy or a copper alloy, and a resin material. The upper housing 1 ′ and the lower housing 1 ″ are configured so as to form an annular shape when the two end faces are brought into contact with each other.
In this embodiment, both the upper housing 1 ′ and the lower housing 1 ″ are made of stainless steel.

  Specifically, as shown in FIGS. 1 to 7, the upper housing 1 ′ is a half in which both flanges Pa and one semicircular packing 2 ′ of two pipe members P opposed to each other are inserted. A circular arc-shaped housing part 1a, a bifurcated connecting piece 1b projecting outwardly connected to the outer peripheral surface of one end of the arc-shaped housing part 1a, and an outer peripheral surface of the other end of the arc-shaped housing part 1a And a bifurcated fastening piece 1c that protrudes outward.

Moreover, the semicircular eaves part accommodating recessed part by which the both ends with which both eaves part Pa of the two facing piping members P was accommodated was open | released in the inner peripheral surface of the width direction center part of the circular-arc-shaped housing part 1a. 1d is formed in a posture along the circumferential direction from the end face of one end of the arcuate housing part 1a to the end face of the other end.
As shown in FIG. 16, the inner side surfaces of the flange housing recess 1 d that are opposed to each other when both flanges Pa of the two pipe members P opposed to each other are stored in the flange housing recess 1 d. The inner side surface of the flange portion receiving recess 1d and the inner side surface of the flange portion Pa of the piping member P are sealed.

  Further, in the plan view as shown in FIG. 6, there is a rectangular frame around the flange housing recess 1d of the upper housing 1 '(both end portions of the inner peripheral surface of the arc-shaped housing portion 1a and both end surfaces of the arc-shaped housing portion 1a). A cylindrical groove 1e for packing insertion is formed.

On the other hand, as shown in FIGS. 1 to 7, the lower housing 1 ″ has a semicircular shape into which both flanges Pa of the two facing pipe members P and the other semicircular packing 2 ′ are inserted. An arcuate housing portion 1a, a bifurcated connecting piece 1b that is connected to the outer peripheral surface of one end of the arcuate housing portion 1a, protrudes outward, and is inserted between the connecting pieces 1b of the upper housing 1 ′, It has a bifurcated fastening piece 1c that is connected to the outer peripheral surface of the other end portion of the arc-shaped housing part 1a and protrudes outward and comes into contact with the fastening piece 1c of the upper housing 1 ′.

Moreover, the semicircular eaves part accommodating recessed part by which the both ends with which both eaves part Pa of the two facing piping members P was accommodated was open | released in the inner peripheral surface of the width direction center part of the circular-arc-shaped housing part 1a. 1d is formed in a posture along the circumferential direction from the end face of one end of the arcuate housing part 1a to the end face of the other end.
As shown in FIG. 16, the inner side surfaces of the flange housing recess 1 d that are opposed to each other when both flanges Pa of the two pipe members P opposed to each other are stored in the flange housing recess 1 d. The inner side surface of the flange portion receiving recess 1d and the inner side surface of the flange portion Pa of the piping member P are sealed.

  Further, in the plan view as shown in FIG. 6, there is a rectangular frame around the flange housing recess 1d of the upper housing 1 '(both end portions of the inner peripheral surface of the arc-shaped housing portion 1a and both end surfaces of the arc-shaped housing portion 1a). A cylindrical groove 1e for packing insertion is formed.

  In addition, the upper housing 1 ′ is tightened when both end surfaces of the upper housing 1 ′ and the lower housing 1 ″ are abutted against the outer surface of the base end of the bifurcated fastening piece 1 c of the lower housing 1 ″. Positioning protrusions 1f are formed so as to protrude from both sides of the piece 1c and position the upper housing 1 ′ and the lower housing 1 ″.

  The upper housing 1 ′ and the lower housing 1 ″ are connected to the two connecting pieces 1 b by inserting the bifurcated connecting piece 1 b of the upper housing 1 ′ between the bifurcated connecting pieces 1 b of the lower housing 1 ″. By inserting the pin 3 and preventing it from coming off with the bush nut 5, the pin 3 is rotatably connected.

  Each of the two semicircular packings 2 'forming the annular split packing 2 is formed in a square frame shape in a plan view by a synthetic rubber such as nitrile rubber (NBR), and in a semicircular shape in a side view. The two semicircular packings 2 'are configured so as to form an annular shape when they are brought into contact with each other.

  Specifically, the two semicircular packings 2 ′ are formed in the same shape and the same size as shown in FIGS. 1 to 5 and FIGS. 8 to 13. A pair of semicircular arc portions 2a, which are respectively inserted into portions located at both ends of the inner peripheral surface of the arc-shaped housing portion 1a of the groove 1e for packing insertion of the side housing 1 ″, and a pair of arc portions 2a Both ends of the pair of arc portions 2a are connected to the outer surfaces of both end portions so as to protrude outward, and the arc-shaped housing of the groove 1e for packing insertion of the upper housing 1 'and the lower housing 1 " A pair of planar U-shaped connecting portions 2b that are respectively inserted into portions located on both end surfaces of the portion 1a, and projecting in the radial direction of the arc portion 2a on the inner peripheral surfaces of the pair of arc portions 2a. The flanges Pa of the pair of piping members P opposed to each other The lip portion 2c is connected to the lip portion 2c at the boundary portion between the both ends of the inner peripheral surface of each arc portion 2a and both end surfaces of the arc portion 2a. When the two end surfaces of the two semicircular packings 2 'are abutted with each other, a large deformation of both end portions of the lip portion 2c is prevented, and the airtightness of the abutting surfaces of the semicircular packings 2' is prevented. A rectangular parallelepiped tongue 2d is provided.

  These two semicircular packings 2 'are both semicircular packings when the two semicircular packings 2' are inserted into the packing insertion grooves 1e of the upper housing 1 'and the lower housing 1 ", respectively. Both end surfaces of 2 'protrude from both end surfaces of the upper housing 1' and the lower housing 1 ".

  Further, both end faces of the arc portion 2a of the two semicircular packings 2 'are inclined surfaces that are inclined upward from the outside to the inside (inclined surfaces in a state where the inner portion protrudes in the circumferential direction from the outer portion). Is formed.

  Furthermore, the inner diameter of both semicircular packings 2 'is formed smaller than the outer diameter of the flange portion Pa of the piping member P to be connected.

  As shown in FIGS. 1 and 2, the tightening tool 4 is swingably connected between the tightening pieces 1c of the lower housing 1 ″ via a rivet pin 6 and is inserted between the tightening pieces 1c of the upper housing 1 ′. A bolt 4a and a nut 4b screwed to the bolt 4a. The bolt 4a is inserted between the tightening pieces 1c of the upper housing 1 'and the nut 4b screwed to the bolt 4a is tightened. The other ends of the upper housing 1 ′ and the lower housing 1 ″ (clamping pieces 1 c) can be clamped and fixed.

  Next, the case where the two piping members P formed with the flange portion Pa are connected to each other using the packing-integrated pipe joint described above will be described.

First, it is checked whether the semicircular packing 2 'is securely inserted in the packing insertion concave groove 1c of the upper housing 1' and the lower housing 1 ", and the two pipe members P to be connected are damaged. Check if there are any foreign objects on the pipe member P. If the pipe member P is severely damaged, do not use it.

  Next, a lubricant is applied to the two semicircular packings 2 ′, and the upper housing 1 ′ and the lower housing 1 ″ are opened, and the flange portions Pa of the two pipe members P to be connected are formed on the lower housing 1 ″. It inserts in the part accommodation recessed part 1d (refer FIG. 14).

  Thereafter, the two piping members P to be connected are leveled, both end surfaces of the piping member P are butted, and the upper housing 1 'is placed on the flange Pa of the piping member P facing the upper housing 1' while maintaining this state.

  Finally, the upper housing 1 ′ and the lower housing 1 ″ are fastened and fixed in the direction of diameter reduction by the tightening tool 4 (see FIG. 15). At this time, both end surfaces of the upper housing 1 ′ and the lower housing 1 ″ contact each other. Tighten with the fasteners 4 until. Also, it is confirmed whether the positioning projection 1f is in contact with one end face of the upper housing 1 '.

  Then, the inner side surfaces of the flange housing recesses 1d of the upper housing 1 ′ and the lower housing 1 ″ are locked to the inner side surface of the flange portion Pa of the piping member P opposed to each other, and both the piping members P are integrated with the packing. While being prevented from coming off from the pipe joint, it is pressed in close contact with the outer peripheral surface portion adjacent to each flange portion Pa of the piping member P facing the annular split packing 2, thereby connecting both the piping members P in an airtight manner. (See FIG. 16).

  As described above, the packing-integrated pipe joint uses the split packing 2 that is divided in two in the diametrical direction, and the split packing 2 and the split housing 1 are integrated, so that two piping members P are connected. When doing so, like the conventional pipe joint using an annular packing, the flange portions Pa of the two piping members P are abutted with each other, and the center position (axial center position) of both the piping members P is matched to both the piping members. The work of keeping P in a horizontal position and the work of evenly covering the butted portion Pa while extending and expanding the packing become unnecessary, and the connection work of the piping member P can be performed easily and easily in a short time. .

  In addition, since this packing-integrated pipe joint has a structure in which the split packing 2 and the housing 1 are integrated, when the housing 1 is attached to the flange portion Pa where the piping member P is abutted, the packing is engaged and the like. No mistakes occur and the cause of water leakage is eliminated.

  Further, when the two pipe members P are connected to each other, this packing-integrated pipe joint inserts the flange portions Pa of the two piping members P into the flange housing recesses 1d of the lower housing 1 ″, respectively. It is only necessary to place the upper housing 1 'on the flanges Pa of the two piping members P with the member P horizontal, and to fasten the upper housing 1' and the lower housing 1 "with the fasteners 4, so that the long piping member P or heavy piping It is not necessary to hold the member P for a long time, and it is possible to connect easily in a short time even in piping work in an uneven work site or in the air.

  Further, in this packing-integrated pipe joint, the annular split packing 2 is in close contact with the outer peripheral surface portion adjacent to the flange portion Pa of the piping member P where scratches and foreign matter (dust, sand, dust, etc.) are difficult to adhere. Therefore, it is excellent in sealing performance as compared with a conventional pipe joint that performs sealing on the outer peripheral surface of the flange portion Pa of the piping member P that is easily damaged.

  Further, this packing-integrated pipe joint is semicircular at a location facing the inner peripheral surface of the semicircular upper housing 1 ′ and lower housing 1 ″ and the outer peripheral surface adjacent to the flange portion Pa of the piping member P. Since the annular packing 2 'is inserted and attached, the width of the split annular housing 1 is inevitably widened, and as a result, when the annular housing 1 is attached to the two piping members P, rattling is reduced. .

  Further, this packing-integrated pipe joint is provided on the inner side of the flange portion Pa of the two pipe members P facing the inner side surfaces of the flange housing recesses 1d formed on the inner peripheral surfaces of the upper housing 1 ′ and the lower housing 1 ″. Since it is configured to come into contact with the side surfaces closer to each other, sealing is also performed between the inner side surface of the flange housing recess 1d and the side surface closer to the inner side of the flange portion Pa of the piping member P, and the sealing performance is further improved. It will be further improved.

Further, in this packing-integrated pipe joint, since both end surfaces of both semicircular packings 2 'protrude from both end surfaces of the upper housing 1' and the lower housing 1 ", respectively, the upper housing 1 'and the lower housing 1 When "" is tightened and fixed, the portions protruding from both end surfaces of the upper housing 1 'and the lower housing 1 "of both semicircular packings 2' are strongly pressed and tightly adhered, and both semicircular packings 2 ' Can be reliably and satisfactorily sealed.
In particular, since both end surfaces of the arc portion 2a of both semicircular packings 2 'are formed as inclined surfaces that are inclined upward from the outside to the inside, the inner portions of both end surfaces of the arc portion 2a are more than the outer portions. Is more strongly pressed, and the airtightness of the abutting surfaces of the two semicircular packings 2 'can be reliably maintained.

  Further, this packing-integrated pipe joint has a rectangular frame-shaped half groove in plan view in a rectangular frame-shaped packing insertion concave groove 1e formed around the flange housing recess 1d of the upper housing 1 ′ and the lower housing 1 ″. Since the circular packing 2 ′ is inserted, the two semicircular packings 2 ′ can be accurately inserted into predetermined positions of the upper housing 1 ′ and the lower housing 1 ″. It is possible to prevent the semicircular packing 2 ′ from being displaced with respect to the upper housing 1 ′ and the lower housing 1 ″.

  Furthermore, since this packing-integrated pipe joint is provided with positioning protrusions 1f locked to the upper housing 1 'on the lower housing 1 ", the upper housing 1' and the lower housing 1" are accurately positioned. As a result, both end surfaces of the two split packings 2 are also abutted accurately and reliably, and a reliable seal can be achieved.

  In the above-described embodiment, one end portions of the upper housing 1 ′ and the lower housing 1 ″ are rotatably connected by the connecting pin 3, and the other end portions of the upper housing 1 ′ and the lower housing 1 ″ are connected. The other ends of the upper housing 1 ′ and the lower housing 1 ″ are also fastened and fixed by the tightening tool 4 in other embodiments, although not shown in the drawings. You may do it.

  In the above embodiment, the upper housing 1 'and the lower housing 1 "are made of stainless steel. However, in other embodiments, the upper housing 1' and the lower housing 1" are made of other materials, for example, You may make it form with ductile cast iron, the nonferrous type of aluminum alloy, a copper alloy, and a resin material.

  In the above embodiment, the annular split packing 2 is formed of synthetic rubber. However, in other embodiments, the split packing 2 is formed of a synthetic resin material such as natural rubber or Teflon (registered trademark). Anyway.

  In the above embodiment, the positioning projection 1f is formed on the lower housing 1 ″. However, in the other embodiments, the upper housing 1 ′ or the upper housing 1 ′ and the lower housing 1 ″ You may make it form the positioning protrusion 1f in both.

  1 is an annular housing, 1 ′ is an upper housing, 1 ″ is a lower housing, 1a is an arcuate housing part, 1b is a connecting piece, 1c is a fastening piece, 1d is a flange receiving recess, 1e is a groove for inserting a packing 1f is a positioning projection, 2 is an annular packing, 2 'is a semicircular packing, 2a is an arc portion, 2b is a U-shaped connecting portion, 2c is a lip portion, 2d is a tongue portion, 3 is a connecting pin, 4 is a clamp, 4a is a bolt, 4b is a nut, 5 is a bush nut, 6 is a rivet pin, P is a piping member, and Pa is a flange.

Claims (4)

Two piping members (P) having an annular flange (Pa) formed on the outer peripheral surface of the end portions are arranged in an opposing manner, and the ends of the two facing piping members (P) are divided into two in the diametrical direction. The two pipe members (P) are connected in a butt-like manner by covering with a two-ring annular housing (1) via an annular split packing (2) and tightening the two-part housing (1) in the direction of diameter reduction. A packing-integrated pipe joint, wherein the packing-integrated pipe joint is a pipe member adjacent to both flanges (Pa) and the flanges (Pa) of the two pipe members (P) opposed to each other. The groove (1e) for packing insertion is formed on the inner peripheral surface that is covered with the outer peripheral surface portion of (P) and faces the outer peripheral surface portion adjacent to the flanges (Pa) of at least two piping members (P). Formed semicircular upper housing (1 ') and The two annular housings (1) made up of the side housing (1 ″) and the packing insertion grooves (1e) of the upper housing (1 ′) and the lower housing (1 ″) are respectively inserted and faced to each other. An annular split packing (2) composed of two semicircular packings (2 ') in close contact with the outer peripheral surface portion adjacent to each flange Pa of the two piping members P, and an upper housing (1') And a fastener (4) for fastening and fixing the lower housing (1 ″) in the diameter reducing direction, and the two semicircular packings (2 ′) are formed in the same shape and the same size. A pair of semicircular arc portions (2a) facing the outer peripheral surface of the piping member (P) adjacent to the flanges (Pa) of the two facing piping members (P), and a pair of arcs Radius of the circular arc part (2a) on the inner peripheral surface of the part (2a) A lip portion (2c) having a tapered cross-sectional shape that is pressed in close contact with an outer peripheral surface portion adjacent to each flange portion (Pa) of the pair of piping members (P) formed to protrude in the direction facing each other. The groove (2e) formed along the arc portion (2a) on the outer peripheral surface of the pair of arc portions (2a), both end positions of the inner peripheral surface of each arc portion (2a), and both end surfaces of the arc portion (2a) And a rectangular parallelepiped tongue (2d) formed in a state of being connected to the lip (2c) at the boundary between the upper housing (1 ') and the lower housing (1') When inserted into the packing insertion groove (1e) of the housing (1 ″), both end faces of both semicircular packings (2 ′) are of the upper housing (1 ′) and the lower housing (1 ″). It protrudes from both end faces, and both ends of both semicircular packings (2 ') A packing-integrated pipe joint characterized in that the surface is formed as an upward inclined surface from the outside to the inside .   Both ends of the semicircular upper housing (1 ′) and lower housing (1 ″) that accommodate both flanges (Pa) of the two pipe members (P) opposed to each other are opened. Each of the semicircular flange housing recesses (1d) is formed, and the inner side surfaces of the flange housing recesses (1d) facing each other are closer to the inside of the flanges (Pa) of the two pipe members (P). The packing-integrated pipe joint according to claim 1, wherein the packing-integrated pipe joint can be brought into contact with each side surface. A rectangular frame-shaped packing insertion groove (1e) is formed around the flange housing recess (1d) of the semicircular upper housing (1 ') and lower housing (1 ") in plan view, and The packing-integrated pipe joint according to claim 2, wherein the two semicircular packings (2 ') are formed in a square frame shape in a plan view and a semicircular arc shape in a side view . When both end surfaces of the upper housing (1 ′) and the lower housing (1 ″) are brought into contact with one or both of the upper housing (1 ′) and the lower housing (1 ″), 3. A positioning projection (1f) for positioning the upper housing (1 ′) and the lower housing (1 ″), which is locked to both side surfaces of the end portion, is formed to project. Item 4. A packing-integrated pipe joint according to item 3 .

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