JP4724671B2 - Check valve unit - Google Patents

Description

  The present invention is used in combination with a stopcock or meter attached to a pipe body such as a water pipe or a water supply pipe of a building such as a building, an apartment house, or a detached house, and reversely prevents the water in the pipe from flowing backward. It relates to a stop valve unit.

  Conventionally, a check valve unit that prevents reverse flow of water in a pipe in combination with a stopcock or meter attached to a pipe such as a water pipe or water pipe of a building, apartment house, detached house, etc. Is used (see Patent Document 1).

  As shown in FIG. 10, this check valve unit is provided in a pipe P connected to the downstream side of the stop cock 40, and has a flange at the opening end of the pipe P on the stop cock 40 side. An annular valve seat 41 is fitted. A valve body 42 is detachably provided on the valve seat 41, and the valve body 42 is moved in the contact / separation direction by a cylindrical valve body holder 43 fitted to the peripheral edge of the valve seat 41. It is held movable.

  The valve body 42 in the valve body holder 43 has a head portion 44 that contacts and separates from the valve seat of the valve seat 41 and a valve shaft 45 that extends downstream from the head portion 44. The valve body holder 43 has a cylindrical shape, and has a plurality of slits in the length direction on its side surface, and water passes through the slits (see FIG. 3 of the embodiment of the present invention).

  The valve shaft 45 is passed through a cylindrical guide portion 46 formed so as to rise from the bottom surface of the valve body holder 43 toward the valve seat, and the valve body 42 is biased to the outer periphery of the guide portion 46 in the valve closing direction. A coil spring 47 is attached. The valve element 42 is held in the valve element holder 43 so as to be movable in the contact / separation direction, and is urged in the valve closing direction by the elastic force of the coil spring 47.

  As shown in FIG. 11 (a), the valve body holder 43 includes a locking claw 48 provided on the inner peripheral portion of the upstream end portion thereof, and an engagement provided on the outer peripheral portion of the valve seat of the valve seat 41. The pawls 49 are engaged with each other to be connected to the valve seat 41.

  As described above, when the valve body holder 43 is connected to the valve seat 41 by engagement, the valve body holder 43 into which the valve body 42 is inserted is engaged with the valve seat 41 to thereby check the valve unit. Can be assembled easily. In addition, when the check nut unit is fitted to the pipe body P, the check valve unit can be easily provided at the opening end of the pipe body P by turning the cap nut with respect to the water stop cock. Good workability.

  When the stop cock 40 is opened, the valve body 42 moves in the downstream direction against the urging force of the coil spring 47 due to the water flow, the valve is opened, and the water passes through the slit of the valve body holder 43 and the tube body. It flows in P (see arrow in FIG. 10).

On the other hand, when the stop cock 40 is closed, the valve body 42 is pressed against the valve seat 41 by the urging force of the coil spring 47 to be in a closed state, thereby preventing the backflow of water in the pipe P.
Japanese Patent Laid-Open No. 9-72442

  In the check valve unit, the valve seat 41 and the valve body holder 43 are connected by engagement of the locking claws 48 and 49. In this structure, as shown in FIG. 11 (b), the valve seat 41 is deteriorated due to aging and the impact on the valve body holder 43 due to the movement of the valve body 42 due to the opening / closing operation of the stop cock 40, as shown in FIG. There is a possibility that the engagement of the seat 41 and the valve body holder 43 by the locking claws 48 and 49 is released, and the valve body holder 43 falls off the valve seat 41.

  Accordingly, an object of the present invention is to prevent the valve element holder from falling off the check valve unit.

  In order to solve the above-mentioned problems, the present invention provides a receiving device on the downstream side of the valve body holder in the tubular body, and stops the downstream movement of the valve body holder with the receiving device.

  If it does in this way, it can stop so that a valve body holder may not remove from a valve seat sheet by providing in a pipe body in the state where the above-mentioned receptacle was in contact with a valve body holder, It is possible to prevent the valve body holder from moving downstream in the tubular body by providing the tubular body away from the tubular body.

  As a configuration of the present invention, a valve seat having an annular valve seat is provided in a pipe body, and a valve body provided so as to be able to contact and separate from the valve seat is urged in a valve closing direction by an elastic body. A valve body holder that holds one end and holds the valve body movably in the contact / separation direction is engaged with the valve seat, and the valve body is moved by the pressure of fluid flowing through the pipe body. In the check valve unit that moves in the valve opening direction against the urging force of the valve, a receiver is provided on the downstream side in the fluid flow direction of the valve body holder to prevent the valve body holder from moving downstream. It was made.

  In this configuration, the valve seat has a flange projecting in the outer circumferential direction, the flange is engaged with the end surface of the tubular body, and the catch is a latch projecting in the outer circumferential direction at the other end. It is possible to adopt a structure in which the receiving member is provided on the tubular body by sandwiching the engaging portion between the end surface of the tubular body and the flange.

  Since the stopper is sandwiched between the end face of the tubular body and the flange, the receiver is easy to assemble and firmly fixed. In addition, if a flange is press-contacted to the end surface of a pipe body by connecting a pipe body to the downstream side of a water stop cock, the fixation will become strong.

  In addition, a valve shaft may be provided on the valve body in order to smoothly move the valve body in the contact / separation direction. In this case, the valve body has a head portion that is detachable from the valve seat, and a valve shaft that extends from the head portion in the valve opening direction (downstream of the fluid) and is movably held by the valve body holder. It is equipped with. At this time, assuming that the receiving member has a guide hole through which the valve shaft passes, not only the state in contact with the valve body holder engaged with the valve seat, but also the valve body holder removed from the valve seat is received. After that, since the receiving member passes the valve shaft of the valve body through the guide hole and holds the valve body so as to be movable in the tube axis direction, the function of the valve body as a check valve can be maintained.

  Further, the receiver includes an annular body having the guide hole and a plurality of arms extending radially from the outer peripheral edge of the annular body, the arms are bent toward the end surface of the tubular body, and the distal end portion thereof is For example, the receiving part can be easily manufactured by punching the receiving part into a predetermined shape by punching with a flat plate material and bending each arm extending from the annular body. It becomes possible.

  The receiver has a connecting portion along the inner peripheral surface of the tubular body, and when the receiver is attached to the tubular body, a cylindrical mounting jig is fitted in the connecting portion of the receiving body, When the mounting jig is inserted into the pipe body and provided in the pipe body, the check valve receiver can be easily inserted into the pipe body by inserting the mounting jig fitted in the connecting portion of the receiver into the pipe body. Can be installed.

  In the present invention, as described above, the receiving member is provided on the downstream side of the pipe body, and the receiving member receives the valve body holder that engages with the valve seat. Can be prevented from falling off.

  Embodiments of the present invention are shown in FIGS. In the check valve unit of this embodiment, as shown in FIG. 1, a pipe body P such as a water supply pipe is connected to the downstream side of the stop cock 10, and the open end of the pipe body P on the stop cock 10 side. The valve seat 12 is fitted to the seat.

  The valve seat 12 has an annular valve seat 11, and a valve body 13 is provided on the valve seat 11 so as to be able to contact and separate. The valve body 13 is held by a cylindrical valve body holder 14 so as to be movable in the contact / separation direction. The valve body holder 14 holding the valve body 13 is fitted into the outer peripheral portion of the valve seat 12 and the valve It is connected to the seat 12. A receiving tool 30 is attached to the downstream side of the valve element holder 14.

  As shown in FIG. 2A, the valve seat 12 has a flange 15 that continuously protrudes on the entire circumference in the outer diameter direction covered with an annular valve seat 11 and a rubber packing 16. When the pipe body P is fixed to the opening end of the stop cock 10 with a cap nut, the flange 15 is pressed between the pipe body P and the stop cock 10, and the stop cock 10 and the pipe body are pressed by the rubber packing 16. Seal between P.

  A locking claw 17 is formed on the outer periphery of the valve seat 11 of the valve seat 12. The locking claw 17 has a stepped portion that increases in diameter toward the downstream side and a tapered portion that decreases in diameter from the stepped portion toward the distal end portion (toward the downstream side).

  The valve body 13 held by the valve body holder 14 includes a hemispherical head 18 that contacts and separates from the inner peripheral surface of the valve seat 11, and a valve shaft 19 that extends from the flat portion of the head 18 in the contact and separation direction. And have. An annular rubber seal ring 20 is embedded at a position in contact with the inner peripheral surface of the valve seat 11 in the spherical portion of the head portion 18. By moving the valve body 13 in the valve closing direction and bringing the seal ring 20 into contact with the inner peripheral surface of the valve seat 11, water tightness between the valve seat 12 and the valve body 13 is ensured.

  As shown in FIG. 3, the valve body holder 14 has a cylindrical shape, and a plurality of slits in the length direction through which water passes are formed on the side surface thereof, and a cylinder through which the valve shaft 19 of the valve body 13 passes at the bottom. The guide portion 21 is integrally formed so as to rise toward the valve seat 11.

  The guide portion 21 is provided with a coil spring 22 as an elastic body that biases the valve body 13 in the valve closing direction, and one end thereof is applied and held. The other end is held by the head 18 of the valve body 13, and the valve body 13 is held in the valve body holder 14 so as to be movable in the contact / separation direction.

  A locking claw 23 is formed on the inner peripheral surface of the valve body holder 14 on the opening end side. The locking claw 23 has a stepped portion that increases in diameter toward the upstream side and a tapered portion that decreases in diameter from the stepped portion toward the distal end portion (toward the upstream side). By engaging the locking claw 23 with the locking claw 17 of the valve seat 11 described above, the seat valve seat 12 and the valve body holder 14 are connected (see FIG. 1).

  The receptacle 30 attached to the downstream side of the valve body holder 14 is made of a metal plate, and is formed by bending a plane plate of a predetermined shape as shown in FIG. The engaging portion 31 is sandwiched between the side end face and the flange 15 of the valve seat 12, the receiving portion 32 that receives the valve element holder 14, and the connecting portion 33 that connects the engaging portion 31 and the receiving portion 32. .

  In the receiving portion 32, three arms 35 extend radially from the outer peripheral edge of the annular body having a guide hole 34 in the center, and the valve shaft 19 of the valve body 13 can be passed through the guide hole 34 ( (Refer FIG.2 (b)). Since the receiving portion 32 has three arms 35 extending radially from the ring body, when the check valve unit is in the open state, water passes between the arms 35 and water passes into the tube P. Does not hinder.

  Furthermore, each arm 35 is extended to provide a locking piece 36 at the tip, and each arm 35 is bent toward the end surface of the tubular body P to form a connecting portion 33, and the locking piece 36 side of each arm 35 is provided. Further, the end portion is bent outward to form the locking portion 31. Thus, the receiving tool 30 can be easily manufactured by bending a plane plate having a predetermined shape.

  The connecting portion 33 may be formed in a cylindrical shape having a flange protruding at one end of the connecting portion 33 on the entire outer diameter direction, and the flange may be used as the locking portion 31 (see FIG. 5A). In this case, since the connection part 33 is attached along the inner peripheral surface of the tubular body P, mounting of the check valve unit is not hindered. Further, the connecting portion 33 may be formed in a cylindrical shape having a plurality of slits in the length direction (see FIG. 5B). In this case, the weight of the receiving tool can be reduced as compared with the cylindrical connecting portion 33 shown in FIG.

  As shown in FIG. 6, the receiving device 30 manufactured in this way is mounted in the tube body P by a cylindrical mounting jig 37 having a flange protruding at one end of the receiving device 30 in the entire outer diameter direction. At the time of mounting, the mounting jig 37 is fitted inside the connecting portion 33 of the receiving tool 30, and the locking piece 36 is inserted by being pushed into the tubular body P along the flange (FIG. 7A). reference).

  After the attachment jig 37 is inserted, as shown in FIG. 7 (b), the attachment jig 37 is pulled out, and the locking portion 31 is connected to the stop cock 10 side end surface of the pipe P, the flange 15 of the valve seat 12, and the like. The stop cock 10 and the pipe P are connected by a cap nut. Thereby, the said receiving tool 30 is attached in the pipe P in the state in which the receiving part 32 contacts the valve body holder 14 (refer Fig.2 (a)). At this time, as shown in FIG. 2 (a), the receiving member 30 has its engaging portion 31 sandwiched between the end face of the tube body P and the flange 15 of the valve seat 12. Installed securely in.

  As described above, since the receptacle 30 attached in the pipe body P receives the valve body holder 14 at the receiving portion 32, the valve body holder 14 can be prevented from falling off from the check valve unit. it can. At this time, since the receiving portion 32 is received in a state where the valve shaft 19 of the valve body 13 is passed through the guide hole 34, the valve body 13 is held so as to be movable in the tube axis direction, and functions as a check valve. Maintained.

  Next, another embodiment of the present invention is shown in FIG. As shown in FIG. 8A, this embodiment is described above in that the receiving tool 30 is mounted in the pipe body P with the receiving portion 32 positioned on the downstream side of the valve body holder 14. Unlike the embodiment, other configurations are the same as those of the above-described embodiment.

  In this embodiment, when the valve body holder 14 is detached from the valve seat 11 due to deterioration of the valve seat 12 or the like, the valve body holder 14 is received by the receiving portion 32 as shown in FIG. Further, since the receiving portion 32 is received in a state where the valve shaft 19 of the valve body 13 is passed through the guide hole 34, the valve body 13 is held so as to be movable in the tube axis direction, and the function as a check valve is maintained. Is done.

  Moreover, as shown in FIG. 9, the receiver 30 can be used in combination with a meter 24 instead of the stop cock 10. Similar to the stop cock 10 described above, the receptacle 30 is provided in the pipe body P connected to the downstream side of the meter 24, and the receptacle portion 32 comes into contact with the valve body holder 14. ing. For this reason, it is possible to prevent the valve element holder 14 from falling off the check valve unit.

  Furthermore, the receiving tool 30 used in combination with the meter 24 may be attached in the pipe body P in a state where the receiving portion 32 is located on the downstream side of the valve body holder 14 (not shown). Also in this case, when the valve body holder 14 is detached from the valve seat 11 due to deterioration of the valve seat 12 described above, the valve body holder 14 is received by the receiving portion 32.

Sectional drawing of check valve unit of one embodiment concerning this invention The principal part expanded sectional view of a check valve unit same as the above, (b) The expanded sectional view which shows the state which received the valve body holder with the receiving tool same as the above The perspective view which shows a valve seat seat same as the above, and a valve body holder The perspective view which shows a receiver same as the above (A) The perspective view which shows the other receptacle same as the above, (b) The perspective view which shows the other receptacle same as the above The perspective view which shows the attachment jig of a receiver same as the above. (A) Sectional drawing which shows the state which attaches a receiver same as the above, (b) Sectional drawing which shows the state which attached the receiver same as the above (A) The principal part expanded sectional view of the non-return valve unit of other embodiment, (b) The expanded sectional view which shows the state which received the valve body holder with the receiver same as the above. The figure which shows the other usage example of the non-return valve unit of one Embodiment which concerns on this invention Cross-sectional front view of a conventional check valve unit Sectional front view which shows the connection part of a valve body and valve body holder same as the above

Explanation of symbols

10 Stop cock 11 Valve seat 12 Valve seat 13 Valve body 14 Valve body holder 15 Flange 16 Rubber packing 17 Locking claw 18 Head 19 Valve shaft 20 Seal ring 21 Guide part 22 Coil spring 23 Locking claw 24 Meter 30 Reverse Stop valve holder 31 Locking portion 32 Receiving portion 33 Connecting portion 34 Guide hole 35 Arm 36 Locking piece 40 Stop cock 41 Valve seat seat 42 Valve body 43 Valve body holder 44 Head 45 Valve shaft 46 Guide portion 47 Coil spring 48 Locking claw 49 Locking claw P Tube

Claims (4)

A valve seat (12) having an annular valve seat (11) is provided in the pipe body (P), and the valve body (13) provided so as to be able to come into contact with and separate from the valve seat (11) is provided by an elastic body (22). The valve seat seat is urged in the valve closing direction, holds one end of the elastic body (22), and holds the valve body (13) movably in the contact / separation direction. A check valve that engages (12) and moves the valve body (13) in the valve opening direction against the urging force of the elastic body (22) by the pressure of the fluid flowing in the pipe body (P). In the unit
The flow direction downstream side of the fluid of the valve body holder (14), receptacle to prevent movement of the downstream side of the valve element holder (14) to (30) is provided, the valve seat sheet (12) the outer periphery A flange (15) projecting in the direction, the flange (15) is engaged with the end face of the pipe body (P), and the receptacle (30) projects in the outer peripheral direction at the other end. The stopper (31) is provided, and the catch (31) is sandwiched between the end surface of the tube (P) and the flange (15), so that the receiving device (30) is inserted into the tube. A check valve unit attached to (P). A valve seat (12) having an annular valve seat (11) is provided in the pipe body (P), and the valve body (13) provided so as to be able to come into contact with and separate from the valve seat (11) is provided by an elastic body (22). The valve seat seat is urged in the valve closing direction, holds one end of the elastic body (22), and holds the valve body (13) movably in the contact / separation direction. A check valve that engages (12) and moves the valve body (13) in the valve opening direction against the urging force of the elastic body (22) by the pressure of the fluid flowing in the pipe body (P). In the unit
A receiving member (30) for preventing the valve body holder (14) from moving downstream is provided on the downstream side in the fluid flow direction of the valve body holder (14), and the valve body (13) is provided with the valve A head (18) provided in contact with and away from the seat (11), and a valve shaft (19) extending from the head (18) in the valve opening direction and movably held by the valve body holder (14); The check valve unit has a guide hole (34) through which the valve shaft (19) passes. The valve body (13) can be moved to the valve body holder (14) extending from the head (18) to the valve seat (11) in a valve opening direction. The check valve according to claim 1 , characterized in that the check valve (19) has a guide hole (34) through which the valve shaft (19) passes. unit. The receiver (30) includes a ring body having a guide hole (34) and a plurality of arms (35) extending radially from the outer peripheral edge of the ring body, and the arms (35) are connected to the pipe body ( The check valve unit according to claim 3 , wherein the check valve unit is bent toward the end face of P), and the distal end portion thereof is bent outward to form the locking portion (31).

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