JP4324286B2 - Simple exchange type check valve and stop cock using the check valve - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a check valve, and more particularly to a check valve that can be suitably used by being attached to a water faucet or the like. More specifically, it is very easy to attach and remove parts such as the valve body mounted in the check valve body, and when it is attached to a stop cock, etc., the sealing at the attachment part is good. It relates to a check valve that can be used. The present invention further relates to a water stop cock using such a check valve.
[0002]
[Prior art]
Generally, in domestic water supply, a stop cock is used in combination with a meter, and when performing construction or the like on the downstream side, the stop cock is closed to stop water. And in order to prevent the backflow from the downstream side when it is in a water flow state, a check valve is also provided. In recent years, this check valve is often attached to a water stop cock.
[0003]
By the way, if the check valve is damaged due to, for example, damage to the valve body or entry of dust or the like, it must be removed and replaced. Therefore, it is desirable that the check valve can be easily attached and detached.
[0004]
As a check valve that can easily replace parts such as the valve body, Japanese Utility Model Laid-Open No. 5-75568 is a check valve connected to a ball valve or the like, and a spring is provided in a substantially cylindrical main body. The check valve body is energized and a stopper ring for receiving the check valve body is fitted to the opening end of the main body, and a retaining ring divided into two to hold the stopper ring is opened in the main body. A check valve is disclosed which is fitted to the end and fitted with an O-ring fitted to the outer periphery of the retaining ring. By removing this O-ring, the split ring can be removed and the valve element can be removed. The check valve is attached to the secondary opening of the ball valve using a cap nut.
[0005]
By the way, this O-ring has been conventionally used for sealing between the outer periphery of the check valve body and the inner periphery of the secondary opening of the ball valve. In order to prevent leakage from between the outer periphery of the check valve body and the inner periphery of the secondary opening of the ball valve, another sealing member is provided between the ball valve, the check valve body and the cap nut. A check valve is provided in between, and is compressed when the cap nut is tightened to attach the ball valve. However, the sealing performance of this sealing member depends on the tightening of the cap nut, and lacks certainty. Conventionally, there is a gap between the outer periphery of the check valve body and the inner periphery of the secondary opening of the ball valve. The above-mentioned O-ring mainly fulfilled the function of sealing.
[0006]
In actual open Hei 5-75568, this O-ring is used, but the member fixed to the check valve main body with the O-ring is a retaining ring divided into two, and this divided into two parts Has gaps and no sealing at all. Therefore, even if an O-ring is used, this portion cannot be sealed. As described above, the other sealing member has a problem in sealing performance, and as a result, the sealing between the check valve main body and the secondary side opening of the ball valve lacks certainty. .
[0007]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described conventional problems, and it is easy to attach and remove parts such as a valve body, and when attached to a water stopcock or the like, the attachment portion is reliably sealed. It is an object of the present invention to provide a check valve that can be used, and a water stopcock using such a check valve.
[0008]
In order to solve the above-mentioned problems, in the present invention, a valve body, a valve seat, and a biasing member, which are dimensioned to be taken out from one end side, are disposed in a hollow cylindrical check valve body, and vice versa. The check valve body includes a slit formed through the peripheral wall of the check valve body in a circumferential direction at a position closer to the one end side than the valve seat in the axial direction of the check valve body. In the axial direction of the check valve main body, the slit is not formed at the same position as the slit, but is formed on the inner periphery of the peripheral wall of the check valve main body in the remaining range in the circumferential direction. There is provided a locking member mounting portion composed of a circumferential groove connected to both ends of the slit, the outer periphery of the locking member mounting portion being larger than the opening on the one end side of the check valve body, 360 degrees smaller than the opening on the one end side of the check valve body. Annularly formed plate-shaped engaging member it is removably inserted through the slit. Thereby, the said valve seat, a valve body, and an urging | biasing member are hold | maintained in a predetermined position.
[0010]
In still another embodiment, shoulder portions extending between the bottom of the circumferential groove and the outer periphery of the check valve body are formed at both ends of the circumferential groove, and the locking member is A small-diameter portion located in the groove and a large-diameter portion located in the slit are provided, and shoulder portions formed at both ends of the large-diameter portion are attached in contact with the shoulder portions of the check valve body.
[0011]
In yet another embodiment, the locking member is divided into two.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, the scope of the present invention is not limited to the embodiments described below.
[0013]
FIG. 1 is a longitudinal sectional view of a check valve 1 according to the first embodiment of the present invention. Reference numeral 3 denotes a main body of the check valve 1. The check valve main body 3 in this embodiment is a hollow substantially cylindrical member as shown in the figure, and includes a large diameter portion 3a and a small diameter portion 3b having different diameters and a connecting portion 3c between the two. Yes. Specifically, the check valve main body 3 in this embodiment is referred to as a so-called “expandable pipe” that is slidably attached in a liquid-tight state to the secondary opening of the stop cock, as will be described later. Is. However, the main body 3 is not limited to this, and a different shape can be used depending on the application of the check valve 3. The distal end portion 6 of the large diameter portion 3a is a valve seat side distal end portion on the side where a valve seat member 11 of the valve unit 5 described later is disposed. The outer diameter of the valve seat side distal end portion 6 is increased. Yes. Reference numeral 8 is an O-ring that seals between the outer periphery of the large-diameter portion 3a and the inner periphery of the secondary opening of the stop cock when the check valve 1 is attached to the stop cock. It is a circumferential groove.
[0014]
The check valve 1 in the present embodiment is a cartridge type. In other words, the valve body 9, the valve seat member 11, and the spring 13 that urges the valve body 9 are attached to or stored in the housing 7 to form the valve unit 5.
[0015]
The housing 7 is a non-closed type. That is, the central bottom portion 7a and the annular bottom annular portion 7b surrounding the central bottom portion 7a are provided with a plurality of transverse ribs 7c provided in the circumferential direction and extending in the radial direction. Further, the bottom annular portion 7b A ring-shaped valve seat ring portion 7d formed to be spaced apart in the axial direction of the bottom ring portion 7b and the housing 7; and a plurality of ring seats provided in the circumferential direction and extending in the axial direction of the housing 7 The vertical ribs 7e are integrated. A guide shaft 7 f for guiding the valve body 9 is formed extending from the central bottom portion 7 a in the axial direction of the housing 7. As shown in the figure, the valve seat ring portion 7d is provided with a circumferential groove 7g on the outer peripheral side. In a state where the valve unit 5 is attached to the main body 3, the outer side surface 7 h of the bottom ring portion 7 b comes into contact with the shoulder portion 3 d formed on the inner surface side of the connecting portion 3 c of the main body 3.
[0016]
For example, the valve seat member 11 made of an elastic material such as rubber is an annular member having a substantially C-shaped cross section, and a locking portion 11 a formed at one end is a circumference of the casing 7. It fits in the groove 7g and is attached so as to surround the outer periphery, the distal end surface and the inner peripheral surface of the distal end portion of the valve seat ring portion 7d as shown in the figure. A tapered seat portion 11b is formed at the inner peripheral end portion, and the valve body 9 is seated on and off.
[0017]
The valve body 9 has a bowl shape, and includes a spherical shell-shaped head portion 9a, a short cylindrical portion 9b that hangs from the outer edge of the head portion 9a, and a valve shaft 9c that hangs from the center of the head portion 9a. The valve shaft 9c is provided with a guide hole 9d corresponding to the guide shaft 7f of the housing 7 provided at the center thereof and a deep circumferential groove 9e provided around the guide hole 9d.
[0018]
One end side of the spring 13 is accommodated in the circumferential groove 9e of the valve body 9, and the other end side is received by the central bottom portion 7a of the housing 7, and urges the valve body 9 toward the seat portion 11b of the valve seat member 11. ing. When the valve body 9 moves, not only the guidance by the guide shaft 7f and the guide hole 9d but also the outer periphery of the cylindrical portion 9b of the valve body 9 is guided by the inner peripheral surface of the vertical rib 7e of the housing 7. It has become.
[0019]
Reference numeral 15 denotes a washer, which is disposed in contact with the valve seat member 11 of the valve unit 5 in the large diameter portion 3 a of the check valve body 3. Reference numeral 17 denotes a stop ring as a holding member or a retaining member attached to the ring attaching portion 4 of the check valve body 3 in order to hold the valve unit 5 and the washer 15 at the illustrated positions. This will be described with reference to FIG.
[0020]
2A is a cross-sectional view of the check valve body 3 taken along line A-A in FIG. 1, and FIG. 2B is a plan view of the stop ring 17. The ring attachment portion 4 formed on the valve seat side distal end portion 6 of the main body 3 has a circumference extending in the circumferential direction formed at the same position in the axial direction of the main body 3, specifically, at a position adjacent to the washer 15. It consists of a groove 4a and a slit 4b penetrating the circumferential wall of the main body. That is, a circumferential groove 4a having a bottom is formed in a predetermined range in the circumferential direction on the inner peripheral side of the large diameter portion 3a. A slit 4b whose width is the same as the width of the circumferential groove 4a is formed in the remaining portion in the circumferential direction on the same cross section. Therefore, both side surfaces of the groove 4a and both side surfaces of the slit 4b form the same side surface 4c (4d). Further, shoulder portions 4e and 4f are formed in the horizontal direction at the boundary between the groove 4a and the slit 4b. As shown in the figure, the shape of the ring mounting portion 4 is symmetrical.
[0021]
The stop ring 17 has a central hole 17a, and has an upper diameter portion 17b whose radius is equal to the radius of the valve seat side distal end portion 6 of the check valve body 3, and a lower radius radius check valve. It consists of a small diameter portion 17c equal to the radius to the bottom of the circumferential groove 4a of the main body 3. In the vicinity of both end portions of the small diameter portion 17c, vertical portions 17d and 17e cut so as to be parallel to each other are formed, and further, horizontal shoulder portions 17f and 17g are formed at both end portions of the large diameter portion 17b. Yes. The distance between the vertical portions 17d and 17e is slightly smaller than the distance between the inner ends of the shoulders 4e and 4f formed at both ends of the groove 4a of the main body 3. As shown in the figure, the shape of the stop ring 17 is symmetrical.
[0022]
The stop ring 17 is inserted into the slit 4c of the main body 3 with the small diameter portion 17c facing down, and the small diameter portion 17c is received in the groove 4a of the main body 3. At this time, the shoulder portions 17f and 17g of the stop ring 17 are respectively placed on the shoulder portions 4e and 4f of the check valve body 3, and the outer peripheral portion of the large diameter portion 17b of the stop ring 17 is the valve seat side of the check valve body 3. It is substantially flush with the outer periphery of the tip 6. As a result, the valve unit 5 and the washer 15 are held in the illustrated position in the check valve body 3. The stop ring 17 can be removed by inserting the fingertip from the valve seat side tip 6 of the check valve body 3, and the washer 15 and the valve unit 5 can be easily removed by pushing from the opposite end 10 side of the body 3. Can do. 2 (b) shows the inner peripheral surface 6b of the counter pressure receiving portion 6a of the tip portion 6 of the check valve body 3, and the stop ring 17 is shown by the two-dot chain line. Even when the side surface is supported by the counter pressure receiving portion 6a of the tip portion 6 of the check valve body 3 at the outer side portion and the counter pressure from the opposite end portion 10 side of the check valve body 3 is applied, The valve unit 5 is held withstanding this.
[0023]
FIG. 3 is a vertical cross-sectional view of the stop cock 21 to which the above-described check valve 1 is attached. In the stop cock main body 23, a ball 25 having an internal flow path 25 a is arranged, and the ball presser 27 is stopped. It is attached to the faucet body 23 and holds the ball 25 in the state shown in the figure. The ball retainer 27 includes a downstream side, that is, secondary side opening 28. A spindle 29 is attached to the ball 25 so as to rotate integrally, and the ball 25 is rotated by operating a handle 31 attached to the upper end of the spindle 29 to switch between water flow and water stop. Reference numeral 33 denotes a spindle press for preventing the spindle 29 from coming off, 35 denotes a handle guide for restricting the rotation of the spindle 29 or the handle 31 to a predetermined range, and 37 denotes a handle guide press. Since these configurations are known, detailed description thereof will be omitted.
[0024]
As shown, the check valve 1 is attached to the secondary opening 28 of the water stop cock. As described above, the sealing O-ring 39 is disposed in the circumferential groove 8 formed at the valve seat side distal end portion 6 of the main body 3 at a position closer to the opposite end portion 10 than the stop ring mounting portion 4. In addition, the space between the inner periphery of the secondary side opening 28 and the outer periphery of the check valve body 3 is liquid-tightly sealed. The check valve body 3 is slidable in the axial direction at the secondary opening 28.
[0025]
Reference numeral 41 denotes a joint packing, which is disposed between the tip of the secondary opening 28, the outer periphery of the check valve body 3, and a joint washer 43, which is an annular member having an L-shaped cross section. Reference numeral 45 denotes a joint nut, which is screwed into a screw formed on the outer periphery of the secondary side opening 28 to compress the joint packing 41 and prevent the check valve 1 from coming off from the secondary side opening 28. is doing. Reference numeral 47 is a cap nut attached to the opposite end 10 of the check valve body 3, and reference numeral 49 is a ring that prevents the cap nut 47 from coming off.
[0026]
Reference numerals 15 and 17 denote the washer and the stop ring, respectively. Since the valve unit 5 is shown and described in detail in FIG. 1, detailed illustration is omitted, and only the reference numeral 5 is shown.
[0027]
In the stop cock 21 configured as described above, the check valve 1 is removed from the stop cock 21 by removing the joint nut 41, and the valve unit 5 of the check valve 1 is simply removed by the procedure described above. The valve body 9 and other maintenance can be made to the throne, while the inner periphery of the secondary opening 28 and the outer periphery of the check valve body 3 can be securely sealed with an O-ring. It does not deteriorate the sealing performance.
[0028]
4A is a cross-sectional view of the stop ring mounting portion 64 of the main body 63 and FIG. 4B is a plan view of the stop ring 65 of the check valve according to the second embodiment. In this embodiment, the stop ring 65 is divided into an upper portion 67 and a lower portion 69. As can be seen from the figure, the stop ring upper portion 67 is a large diameter portion whose radius is equal to the radius of the outer periphery of the valve seat side tip portion (see FIG. 1) of the check valve body, and the stop ring lower portion 69 has a radius that stops. It is a small diameter portion equal to the radius to the bottom of the groove 64a of the ring mounting portion 64. The dimension between the side surfaces 64c and 64d is substantially equal to the thickness of the stop ring 65.
[0029]
In this embodiment, the circumferential groove 64a of the stop ring mounting portion 64 is formed over a wider range in the circumferential direction than the circumferential groove 4a in the first embodiment, and the range of the slit 64b is accordingly increased. It is narrower.
[0030]
The stop ring lower portion 69 includes horizontal portions 69 a and 69 b that are horizontally cut at both ends thereof, and inclined portions 69 c and 69 d that are inclined inward of the center hole 81. On the other hand, the stop ring upper portion 67 includes horizontal portions 69a and 69b of the stop ring lower portion 69, horizontal portions 67a and 67b, and inclined portions 67c and 67d corresponding to the inclined portions 69c and 69d. The portions 67e, 67f of the horizontal portions 67a, 67b of the stop ring upper portion and the horizontal portions 69a, 69b of the stop ring lower portion 69 of the circumferential groove 64a of the stop ring mounting portion 64 of the check valve main body 63 are formed. It will rest on the horizontal shoulders 64e and 64f formed at both ends.
[0031]
In order to attach the stop ring 65, the stop ring lower portion 69 is first inserted from the slit 64b and disposed in the circumferential groove 64a. At this time, the diameter of the outer periphery of the stop ring lower portion 69 is larger than the dimension between the shoulders 64e and 64f at the end of the circumferential groove 64a, so that one end is inserted into the slit 64b and rotated little by little. The whole will be inserted. Thereafter, the stop ring upper portion 67 is inserted so that the end portions 67e and 67f of the horizontal portion are placed on the shoulder portions 64e and 64f of the attachment portion 64.
[0032]
In this embodiment, since the stop ring 65 is divided into two, the range of the slit 64b of the mounting portion 64 can be narrowed, and the range in which the circumferential groove 64a is formed is increased accordingly, and the stop ring that receives back pressure. A larger portion of the counter pressure receiving portion 6a for receiving 65 is integrated with the check valve body through the bottom of the groove 64a. Therefore, there exists an advantage that the intensity | strength with respect to a back pressure increases.
[0033]
FIG. 5 is a plan view of a stop ring 75 used in the check valve according to the third embodiment. The stop ring 75 has a large-diameter portion 77 in the upper half and a small-diameter portion 79 in the lower half. Yes. Correspondingly, the slits and grooves of the ring mounting portion 4 of the check valve body 3 are also formed in a range of 180 degrees (not shown). As can be seen from the description of the first and second embodiments, the shape of the ring mounting portion 4 is such that the range in which the slit is formed is narrow, and the wider the range in which the groove is formed, Strength increases. However, when the thickness of the counter pressure receiving portion indicated by reference numeral 6a in FIG. 1 is sufficiently large, deformation of the slit portion due to the counter pressure hardly occurs, and a simpler shape as in the third embodiment is achieved. It is possible to use a stop ring. However, as in the case of a water meter valve, for example, the so-called dimension between the end face of the primary opening 26 of the stop cock main body 23 shown in FIG. The amount of expansion and contraction of the pipe 3 is determined by the specification, and therefore the thickness of the counter pressure receiving portion 6a may not be sufficiently obtained. In such a case, it is desirable to form the groove in a wide range by adopting the configuration as in the first or second embodiment.
[0034]
In the above-described embodiment, the check valve is a cartridge type, and the valve unit 5 is configured by housing or attaching the valve body 9 or the like to the housing 7, and the valve unit 5 is connected to the stop rings 17 and 65. Although it is configured to be held in the main body, it is not limited to this format. That is, without using a housing, a plurality of ridges protruding inward, which correspond to the longitudinal ribs 7e of the housing 7, are formed in a strip shape in the axial direction of the body, thereby directly guiding the valve body. You may make it do. At that time, it is possible to receive and position one side of the washer at the end of the raised portion, and to attach the valve seat member integrally to the washer. And a stop ring can be arrange | positioned on the opposite surface side of a washer, and a valve body etc. can be hold | maintained. Moreover, although the ball-type water stop cock was demonstrated as a water stop cock, it is not limited to this.
[0035]
【The invention's effect】
As described above in detail, in the check valve according to the present invention, the valve body and the like can be attached and detached with a simple operation, which is extremely efficient in terms of maintenance. On the other hand, the check valve is used as a stop cock. When attached, the sealing performance at the attachment portion can be maintained satisfactorily. Therefore, the maintenance of the stop cock using this check valve can be performed efficiently.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a check valve according to a first embodiment of the present invention.
2 is a cross-sectional view of a check valve body mounting portion in a cross section taken along line AA in FIG. 1, and a plan view of a stop ring. FIG.
3 is a longitudinal sectional view of a water stop cock equipped with the check valve of FIG. 1. FIG.
FIGS. 4A and 4B are a cross-sectional view of a check valve body mounting portion of a check valve according to a second embodiment and a plan view of a stop ring. FIGS.
FIG. 5 is a plan view of a stop ring used for a check valve according to a third embodiment.
[Explanation of symbols]
1 Check valve 3 Check valve body 4 Ring mounting part (locking member mounting part)
4a groove 4b slit 4e, 4f shoulder 5 valve unit 7 housing 9 valve body 11 valve seat member 13 spring (biasing member)
15 Washer 17 Stop ring (locking member)
17b Large diameter part 17c Small diameter part 17f, 17g Shoulder part 21 Water stop cock 28 Secondary side opening part 8 Circumferential groove 39 O-ring

Claims (5)

A hollow cylindrical check valve body, a valve body disposed in the check valve body, and a biasing force that biases the valve body toward a valve seat disposed on one end side of the check valve body In the check valve, the valve body, the valve seat, and the biasing member have dimensions that can be taken out from the opening on the one end side of the check valve body.
The check valve body penetrates the peripheral wall of the check valve body over a predetermined range in the circumferential direction at a position closer to the one end side than the valve seat in the axial direction of the check valve body. Formed in the inner periphery of the peripheral wall of the check valve body in the range of the remaining slit in the circumferential direction where the slit is not formed at the same position as the slit in the axial direction of the check valve body. In addition, a locking member mounting portion is provided that is configured with a circumferential groove that is connected to both ends of the slit, respectively.
A plate formed in an annular shape over 360 degrees on the locking member mounting portion, whose outer periphery is larger than the opening on the one end side of the check valve body and whose inner diameter is smaller than the opening on the one end side of the check valve body A non-return valve characterized in that a shaped locking member is detachably inserted through the slit and holds the valve seat, the valve body and the biasing member in a predetermined position . 2. The check valve according to claim 1, wherein the check valve is formed at both ends of the circumferential groove and extends between a bottom of the circumferential groove and an outer periphery of the check valve body. The locking member includes a small-diameter portion located in the circumferential groove and a large-diameter portion located in the slit, and shoulder portions formed at both ends of the large-diameter portion are opposite to each other. A check valve, wherein the check valve abuts against a shoulder portion of the check valve body. The check valve according to claim 1 or 2, wherein the locking member is divided into two. A stop cock having a primary side opening and a secondary side opening and operating a valve body received inside the main body to switch between water flow and water stop, and at least a part of the main body at the secondary side opening. A check valve having a check valve into which the check valve is inserted, wherein the check valve is the check valve according to any one of claims 1 to 3, wherein the check valve further includes the check valve. A water stop cock, comprising a sealing member for liquid-tightly sealing between an outer periphery of a main body and an inner periphery of the secondary side opening. 5. The water stop cock according to claim 4, wherein the check valve body of the check valve is a telescopic pipe that is slidably attached to the secondary side opening in a liquid-tight state. Water faucet.

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