JP5476176B2 - Drain valve - Google Patents

Description

  The present invention relates to a drainage vent valve that is attached to a drainage pipe such as a kitchen sink, a bathtub, or a toilet provided in a building such as a house and is used for inhaling outside air when the inside of the drainage pipe has a negative pressure.

  The drain pipe has a trap portion curved in an S shape or a U shape, and drainage is accumulated in the trap portion. This prevents the bad odor drifting from the downstream of the drain pipe from filling the room because the residual waste water blocks the inside of the trap portion. It also prevents the invasion of pests that creep up from the downstream side of the drain pipe.

  However, when the pressure in the drain pipe decreases and becomes negative due to the downstream state of the drain pipe, the residual drainage in the trap portion may be sucked and flowed downstream. Therefore, by providing a vent valve downstream from the trap part of the drain pipe, it is necessary to suck the outside air and prevent the residual drain from flowing when the inside of the distribution pipe becomes negative pressure. In addition, considering the ease of installation, drainage efficiency, etc., most drain pipes are installed in the vertical direction (same as the direction of gravity) or in the horizontal direction.

  There are various types of vent valves attached to the drain pipe. For example, a drain vent device 70 of Patent Document 1 is known.

  FIG. 4A is a perspective view in which the drainage ventilation device 70 of Patent Document 1 is attached to a drain pipe P1 installed in the vertical direction. The drainage ventilation device 70 is attached to a joint E1 that is fastened and fixed to the drainage pipe P1 by a lock nut B. Further, the drain ventilation device 70 is attached so as to be parallel to the drain pipe P1.

  FIG. 4B shows a cross-sectional view of the drainage ventilation device 70 of FIG. The drainage ventilator 70 is fixed by inserting the fitting portion 71 of the drainage ventilator 70 into the protruding opening E1a on the joint E1 side, so that the drainage ventilator 70 can be easily attached. The valve body 44 of the ventilation valve 50 that closes the ventilation hole 45 is fixed to a valve shaft 44 a that is slidably inserted into the valve bearing 48. Further, a check valve 60 is provided in order to prevent the backflow of drainage from the drain pipe P1, but it has the same structure as the vent valve 50 except that the biasing force by the spring S is used.

  When the pressure in the drain pipe P1 becomes negative, the valve body 54 of the check valve 60 is sucked, and the valve body 54 slides downward against the urging force of the spring S. Next, the valve body 44 of the vent valve 50 is sucked through the valve chamber 56, slides upward against the weight of the valve body 44, and outside air is sucked from the vent hole 45 and reaches the drain pipe P1. When the pressure inside the drain pipe P1 is no longer negative, the valve body 44 of the vent valve 50 slides downward again due to the weight of the valve body 44 to block the vent hole 45. Further, the valve body 54 of the check valve 60 slides upward again by the urging force of the spring S.

  Since the opening and closing operations of the vent valve 50 and the check valve 60 are adjusted by the weight of the valve body (44, 54), the valve body cannot reliably block the vent hole when the weight direction changes. In some cases, the valve body may not slide during negative pressure, and the desired valve function cannot be maintained.

  Therefore, when the drain pipe P2 is installed in the horizontal direction as shown in FIG. 4C, the drain aeration apparatus 70 is installed using the joint E2 so as to be perpendicular to the drain pipe P2. Will be. As a result, the drainage ventilation device 70 is installed in the vertical direction as in FIG. Therefore, since the weight direction of the valve body does not change, the valve function is maintained without changing the opening / closing characteristics.

  Thus, in order to attach the drainage ventilation device 70 to the drain pipe installed in the vertical direction or the horizontal direction, two joints (E1, E2) must be separately prepared. When attaching the drainage venting device 70, it is necessary to facilitate different joints depending on the installation direction of the drainage pipe, which is troublesome and costly.

Japanese Patent Application No. 2002-154191

  Accordingly, in view of the above problems, the present invention provides a drainage vent valve that can maintain a valve function without requiring a joint separately depending on whether the drain pipe is arranged in a vertical direction or a horizontal direction. With the goal.

  The drainage vent valve of the present invention comprises a main pipe part having a connection port to which a drain pipe is connected at both ends, and a branch pipe provided by branching from the main pipe part. The valve body is provided with a valve body that opens the vent hole when the inside of the pipe becomes negative pressure, and the valve body moves at an angle of 45 degrees with respect to the axial direction of the main pipe section so that the vent hole can be opened and closed. It is characterized by being made.

  According to the above feature, since the valve body is provided at an angle of 45 degrees with respect to the axial direction of the main pipe section, even if the main pipe section is connected to the vertical drain pipe, the parallel drain pipe Even if it connects to, the angle which the said valve body and a drain pipe make is 45 degree | times. And since the said valve body can open and close a vent hole, according to arrangement | positioning of a drain pipe, it does not require a different joint separately.

  Next, the drainage vent valve of the present invention is characterized in that the valve body is urged so as to close the vent hole.

  According to the above feature, even when the valve body is urged to close the vent, the valve body moves at an angle of 45 degrees with respect to the axial direction of the main pipe portion so that the vent can be opened and closed. Therefore, the function of the vent valve is not lost.

  Next, the drainage vent valve of the present invention is characterized in that the valve body is biased by repulsion or attraction of a magnet.

  According to the above feature, the opening / closing operation of the vent is performed more smoothly by using the non-contact biasing means by repulsion or attraction of the magnet.

  As described above, according to the drainage vent valve of the present invention, it is not necessary to prepare a separate joint depending on whether the drain pipe is arranged in the vertical direction or the horizontal direction, and the valve function can be maintained. .

It shows an example of the drainage vent valve of the present invention, (a) is a cross-sectional view in which the axial direction of the main pipe part is a vertical direction, (b) is a cross-sectional view in which the axial direction of the main pipe part is a horizontal direction. is there. It is another example of the vent valve for drainage of this invention, (a) is sectional drawing which showed the case where the valve body is urged | biased by magnetic force, (b) is the case where the branch pipe is curving. The use aspect which has installed the vent valve for drainage of this invention in the drain pipe is shown. As an example of the background art of the present invention, a drainage ventilation device is shown, (a) is a perspective view of a drainage ventilation device installed in a vertical drain pipe, (b) is a cross-sectional view of the drainage ventilation device, (C) is a perspective view of the drainage ventilator installed in the horizontal drain pipe.

DESCRIPTION OF SYMBOLS 1 Main pipe part 2 Connection port 3 Branch pipe 4 Valve body 5 Vent hole 6 Upper cover 7 Insect net 8 Valve bearing 9 Valve body guide 10 Drain valve for drainage
S spring
P1 Vertical drainage pipe
P2 Horizontal drainage pipe
B Lock nut
E1, E2 Fitting

  Embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1 (a), a drainage vent valve 10 has a main pipe portion 1 provided with a connection port 2a for an upstream drainage pipe and a connection port 2b for a downstream drainage pipe at both ends. The branch pipe 3 and the vent hole 5 branched from 1 are directed upstream. Thus, since the branch pipe 3 and the vent 5 are arranged so as to face the upstream side, the drainage can be prevented from flowing backward and flowing out from the vent 5.

  The vent valve tip 10a attached to the tip of the branch pipe 3 is provided with a valve body 4 so that it can slide at an angle of 45 degrees with respect to the axial direction of the main pipe part 1. An upper lid 6 is provided above the vent 5, and an insect net 7 is stretched between the upper lid 6 and the vent 5. The upper lid 6 and the insect net 7 prevent the invasion of pests from the vent hole 5.

  The valve body 4 includes a valve shaft 4a, a protrusion 4b, and a valve plate 4c, and the valve shaft 4a is provided vertically from the center of the valve plate 4c. The valve shaft 4a is slidably supported by a valve bearing 8, and a spring S is attached to the valve shaft 4a. The upper end of the spring S is fixed to the lower part of the valve body 4, the lower end of the spring 4 is fixed to the valve bearing 8, and the valve body 4 is urged toward the vent hole 5 to block the vent hole 5. . The vent hole 5 has a circular shape, and the valve plate 4 c has a concentric circular shape with a radius larger than that of the vent hole 5. Therefore, the vent hole 5 can be reliably closed by the valve body 4.

  The valve bearing 8 extends from the inside of the vent valve tip 10a and has a through hole 8a. And the valve shaft 4a is inserted in the through-hole 8a, and is supported so that a slide is possible. The center of the through hole 8 a of the valve bearing 8 coincides with the center of the valve shaft 4 a and forms 45 degrees with respect to the axial direction of the main pipe portion 1. Therefore, the valve body 4 always slides at an angle of 45 degrees with respect to the axial direction of the main pipe portion 1 and is urged toward the vent hole 5.

  When the pressure in the drain pipe becomes negative, the valve body 4 is pulled in the direction of the main pipe section 1 and slides downward, and outside air is sucked from the vent hole 5. A valve body guide 9 provided parallel to the valve shaft 4a guides the protrusion 4b so that the valve body 4 does not rotate or become inclined. When the pressure inside the drain pipe is no longer negative, the valve body 4 is pushed back upward by the urging force of the spring S and closes the vent hole 5 again.

  The characteristics of the opening / closing operation of the valve body 4 as described above are determined by the rigidity of the spring S. Further, the weight of the valve body 4 is always added in the extending and contracting direction of the spring S. Therefore, the rigidity of the spring S is such that the valve body 4 can be urged to the vent hole 5 in a state where the weight of the valve body 4 is added, and against the urging force of the spring S when negative pressure is applied. It is adjusted so that 4 can slide downward.

  Here, the weight F1 of the valve body 4 acting in the expansion / contraction direction of the spring S in FIG. The drainage vent valve 10 is installed in a drain pipe P1 provided in the vertical direction, and the valve body 4 and the valve shaft 4a form 45 degrees with respect to the vertical direction. Therefore, when the weight of the valve body 4 is W [N] and the weight W of the valve body 4 is disassembled in the direction of the valve shaft 4a, F1 = Wcos 45 ° (W cos 45 °, the same applies hereinafter).

  Next, FIG. 1B shows the drainage vent valve 10 shown in FIG. 1A installed in a drain pipe P2 provided in the horizontal direction. The valve body 4 and the valve shaft 4a form 45 degrees with respect to the horizontal direction. Therefore, the weight F2 of the valve body 4 acting in the expansion / contraction direction of the spring S is F2 = Wsin45 ° when the weight W of the valve body 4 is disassembled in the valve shaft 4a direction.

  Here, since sin45 ° and cos45 ° have the same value, it can be seen that F1 and F2 are equal. And since the valve body 4 slides at an angle of 45 degrees with respect to the axial direction of the main pipe part 1 connected to the drain pipes (P1, P2) in the vertical direction and the horizontal direction, the spring S is always in the expansion / contraction direction of the spring S. The size (F1, F2) of the working valve body 4 is constant. Further, since the valve plate 4 c has a circular shape, the center of gravity is always at the center of the valve body 4. Therefore, even when the drainage vent valve 10 is attached to the vertical and horizontal drain pipes (P1, P2), the urging force of the valve body 4 toward the vent 5 is equal in the opening / closing operation, so that the opening / closing is performed. The operating characteristics do not change. The valve plate 4 c does not have to be circular, and can be any shape as long as the center of gravity is located at the center of the valve body 4.

  Thus, if the valve body 4 slides at an angle of 45 degrees with respect to the axial direction of the main pipe section 1, even if the main pipe section 1 is installed in the vertical direction or the horizontal direction, The valve function can be maintained without requiring a joint.

  FIG. 2A shows a case where the valve body 14 is urged by a magnetic force. The drainage vent valve 10 shown in FIG. 1 (a) has the same configuration except that magnets (M1, M2) are used as urging means, and the valve body 14 has a main pipe section 11. It can slide at an angle of 45 degrees with respect to the axial direction.

  The valve body 14 includes a magnet M1, a protrusion 14b, and a valve plate 14c, and the magnet M1 is provided at the center of the valve plate 14c. The magnet M1 is arranged so as to repel the magnet M2 fixed to the vent valve tip 20a below the valve body 14. Further, since the surface M1a of the magnet M1 and the surface M2a of the magnet M2 are arranged so as to be parallel to the vent 15 and the valve body 14, the repulsive force of the magnets (M1, M2) It is transmitted evenly to the contact surface with the body 14, and the vent hole 15 can be reliably closed.

  When the pressure in the drain pipe becomes negative, the valve body 14 is pulled in the direction of the main pipe section 11 and slides downward, and outside air is sucked from the vent hole 15. At this time, the valve body guide 19 that forms an angle of 45 degrees with respect to the axial direction of the main pipe section 11 is provided with a projection 14b so that the valve body 14 can slide at an angle of 45 degrees with respect to the axial direction of the main pipe section 11. Is induced. When the pressure in the drain pipe is no longer negative, the valve body 14 is pushed back upward by the repulsive force of the magnets M1 and M2, and closes the vent hole 15 again.

  The characteristics of the opening / closing operation of the valve body 14 as described above are determined by the repulsive force of the magnets (M1, M2). The weight of the valve body 14 is always added in the sliding direction of the valve body 14. Therefore, the repulsive force of the magnets (M1, M2) is such that the valve body 14 can be urged to the vent hole 15 with the weight of the valve body 14 added, and the magnets (M1, M2) are under negative pressure. The valve element 14 is adjusted so that it can slide downward against the repulsive force.

  Even when the drainage vent valve 20 is attached to the drainage pipes (P1, P2) in the vertical direction and the horizontal direction, the magnitude of the weight added in the sliding direction of the valve body 14 is equal, and the valve body 14 Always slides at an angle of 45 degrees with respect to the axial direction of the main pipe part 11. Therefore, in the opening / closing operation, the urging force of the valve body 14 toward the vent 15 is equal, and the opening / closing operation characteristics do not change (see paragraphs [0026] to [0028]).

  Thus, by using a magnet as the urging means, there is no contact between the valve shaft 4a and the valve bearing 8, unlike the drainage vent valve 10 in FIG. It becomes. Further, even when the magnet M2 is fixed to the upper lid 16 side above the vent 15 and arranged to be attracted to the magnet M1, the valve body 14 can be urged to the vent 15 to perform the opening / closing operation. .

  FIG. 2B is a cross-sectional view showing a case where the branch pipe 23 is curved. In order to maintain the valve function, the valve body 24 only needs to be able to slide at an angle of 45 degrees with respect to the axial direction of the main pipe section 21. Therefore, the branch pipe 13 is connected to the main pipe section 11 as shown in FIG. May not be inclined at 45 degrees. Therefore, a curved shape like the branch pipe 23 may be used, and the shape can be made arbitrary.

  3A shows a perspective view in which a drainage vent valve 40 is installed in a vertical drain pipe P1 having a trap portion T. FIG. A drainage vent valve 40 is installed on the downstream side of the trap portion T so that the vent hole 35 faces the upstream side. In the drainage vent valve 40, the upstream drain pipe P1a is connected to the connection port 32a and is fastened and fixed by the lock nut B. Similarly, a downstream drain pipe P1b is connected to the connection port 32b and is fastened and fixed by a lock nut B.

  By installing the drainage vent valve 40 in this manner, even if the downstream side of the drainage pipe P1 becomes negative pressure, the valve function of the drainage vent valve 40 sucks outside air from the vent 35 and Residual drainage can be prevented from being washed away. Further, since the branch pipe 33 and the vent hole 35 are arranged so as to face the upstream side, it is possible to prevent the drainage from flowing backward and flowing out from the vent hole 35.

  The struts 36a and 36b that support the upper lid 36 above the vent hole 35 at the tip have different widths. The column 36a has a narrow width so that dust, dust and the like do not accumulate inside the column 36a. On the other hand, the column 36b is wide in order to prevent dust, dust, and the like falling from above from entering the vent hole 35.

  If the drain vent valve 40 is attached to the horizontal drain pipe P2 shown in FIG. 3B as it is, the wide column 36b will be below the vent 35. Thus, the top cover 36 or the tip 40a of the drainage vent valve 40 is rotatably attached to the branch pipe 33 so that the column 36b is positioned above the vent 35 as shown in FIG. it can.

  The drainage vent valve of the present invention is not limited to the above-described examples, and various modifications and combinations are possible within the scope of the claims and the scope of the embodiments. Examples and combinations are also included in the scope of rights.

  The drainage vent valve of the present invention is used in an industrial field in which it is required to suck outside air into the drainage pipe at the time of negative pressure in the drainage pipe of a kitchen sink, bathtub, toilet, etc. provided in a building such as a house. be able to.

Claims (3)

A main pipe part having a connection port to which a drain pipe is connected at both ends, and a branch pipe provided by branching from the main pipe part,
At the tip of the branch pipe is provided with a valve body that opens the vent hole by the negative pressure in the drain pipe,
The valve body is provided to be able to open and close the vent by moving at an angle of 45 degrees with respect to the axial direction of the main pipe part .
Furthermore, when the main pipe part is connected to a drain pipe installed in a vertical direction, a tip of the branch pipe is arranged toward the drain pipe on the inflow side .   The drain valve according to claim 1, wherein the valve body is biased so as to close the vent hole.   The drain valve according to claim 2, wherein the valve body is biased by repulsion or attraction of a magnet.

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