JPH1194104A - Check valve cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a check valve cartridge which is used with being mounted on a connecting section of piping or piping equipment of waterworks, is easily removed, and provides easy maintenance and replacement of a check valve. SOLUTION: A valve seat member 23 is mounted at an opening of a nonclosed housing 25, and a valve element 27 energized by a spring is arranged in the inside. A cover body 73 is mounted on the outer periphery of the valve seat member 23. This cartridge with the cover body is mounted to a body 2 by threadedly engaged the cover body 73 with the body 2, and a contact surface 77 inside of a first annular part 75 in the cover element 73 is sealed in contact with the outside surface of an outer end coating part 51 of the valve seat member 23 and the inner peripheral surface 80 of the body 2 is sealed by the outer peripheral part of the outer end coating part 51.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve cartridge which is inserted and fixed in a water supply pipe or a connecting portion of equipment to prevent reverse flow of a fluid. And a check valve cartridge convenient for maintenance.

[0002]

2. Description of the Related Art Conventionally, various types of check valves for preventing backflow of fluid have been used. One of such check valves, for example, is inserted in the middle of a water supply pipe, and There is a cartridge type check valve that is mounted and fixed at a position. Here, an example shown in FIG. 2 will be described.

FIG. 2 is a sectional view of a single check valve 1 constructed using a check valve cartridge 21. The cartridge 21 includes an annular valve seat member 23 and a housing 2.
5 and a valve body 27. The bottom of the housing 25 includes a central hub 29, a plurality of arms 31 extending radially from the hub 29, and a bottom annular portion 33 connecting the outer ends of the arms 31. The side portion of the housing 25 is constituted by a plurality of ribs 35 extending from the bottom annular portion 33 in a direction orthogonal to the arm 31.
The other end of the rib is connected to an annular valve seat member mounting portion 37 for mounting the valve seat member 23. Accordingly, the housing 25 is provided with the fluid inlet or opening 2 of the valve seat member 23.
4 is in a non-closed form in which the fluid flowing from 4 can flow between the ribs 35 and between the arms 31. The cross-sectional shape of the valve seat member mounting portion 37 is a shape having a groove opened outward as shown in the figure.

A post 39 is formed in the hub 29 in the same direction as the rib 35, and a blind hole 28 formed in the center of the valve body 27 is fitted into the post 39. The valve body 27 slides along the post 39. It is free to move. And post 3 as urging means
9 is urged toward the valve seat member 23 by a spring 41 arranged to surround the same.

The valve seat member 23 includes a metal ring 43 made of a material such as stainless steel or phosphor bronze, and a rubber cover or packing 4 integrally formed on the metal ring 43.
5 is comprised. The covering body 45 includes a sealing portion 47 on which the valve body 27 is detached and seated, an inner diameter covering portion 49 covering the inner diameter portion of the metal ring 43, and an outer end surface covering portion 51 covering the outer side surface of the metal ring 43. As shown in the figure, the metal ring 43 is formed so as to embrace it. Also, the sealing portion 4
A mounting portion 50 having a shape corresponding to the cross-sectional shape of the valve seat member mounting portion 37 of the housing is formed outside the housing 7, and the valve seat member 23 is mounted on the housing 25 as shown in the figure. Note that, instead of forming the outer end surface covering portion 51, a configuration in which an O-ring or a flat packing is disposed is also possible.

Reference numeral 2 denotes a case or a main body for accommodating the cartridge 21 therein, and a shoulder portion 33 formed therein.
The bottom annular portion 3 of the housing 25 of the cartridge 21
3 are positioned and held in contact with each other. Reference numeral 5 denotes a socket connected to the main body 2 by a screw portion 7, and by tightening the screw portion 7, the contact surface 6 presses the outer end surface covering portion 51 of the valve seat member 23, and this portion is Between the contact surface 6, the metal ring 43 and the inner peripheral surface 11 of the main body 2. The amount of tightening is limited by the end face 4 of the main body 2. In this case, a seal is formed between the contact surface 6 of the socket and water on the upstream side is prevented from leaking from between the end surface 4 of the main body and the contact surface 6 of the socket. Even in the case where the backflow is prevented by contacting the stop portion 47, the inner peripheral surface 11 of the main body 2 is sealed, so that the function of preventing leakage of water on the downstream side is achieved. Reference numeral 8 denotes a cap nut attached to the socket via a direct connection ring 9. Other pipes or devices are respectively attached to the outer thread portion of the main body 2 and the inner thread portion of the cap nut 8.

[0007]

In the conventional check valve cartridge 21 having the above structure, even if the socket 5 is removed for maintenance of the cartridge 21, the packing 45, an O-ring, a flat packing, or the like is used. The main body 2 such as packing
The portion protruding from the end face 4 is only a compression allowance at the time of sealing, and is extremely short. Therefore, even if the cartridge 21 is to be removed, it cannot be easily removed. Therefore, the main body 2
It is also necessary to remove the connection with the piping or equipment attached to the device. However, this type of cartridge 21
Is used not only in the form shown in the example shown, but also in various parts of the tubing, for example, it may be attached to the end of a longer tubular member instead of the body 2 shown. In this case, it is not easy to remove the check valve 21 even if the piping or equipment connected to this member is removed.

The present invention has been made in view of the above problems, and has as its object to provide a check valve cartridge that can be easily removed from an attached pipe or equipment.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a check valve cartridge according to the present invention is provided with a mounting member for detachably mounting the cartridge to a pipe or a connecting portion of equipment. The mounting member is formed with a first annular portion provided with a center hole communicating with the fluid inlet of the valve seat member, and is connected to the first annular portion. A second annular portion having a large inner diameter and a mounting portion attached to a pipe or a connection portion of equipment are provided, and an inner peripheral surface of the second annular portion is fitted to an outer peripheral portion of the seal portion. The shoulder formed on the side of the second annular portion of the first annular portion is configured to abut the outer surface of the seal portion.

[0010] In a more specific embodiment, a female thread is engraved at a connecting portion of a pipe or a device, and a male screw is engraved at a mounting portion of a mounting member. Also,
The mounting member has a flange that can abut on an end of a pipe or a connection portion of the device.

[0011] In a more specific embodiment, the valve seat portion and the seal portion of the valve seat member are formed integrally. Also,
The valve seat member is composed of a metal ring and a coating made of an elastic material that covers the metal ring, and the coating is formed on one side of the ring near the inner peripheral portion thereof. And an inner peripheral covering portion for covering the inner periphery of the ring, and the seal portion formed on the other surface side of the ring.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings, but the scope of the present invention is not limited to the embodiments described below.

FIG. 1 is a sectional view of a single check valve 61 constructed using a check valve cartridge 71 according to a specific embodiment of the present invention. The same reference numerals are used for the same members as those in the conventional example of FIG. 2, and the detailed description is omitted.

The cartridge 71 has the same members as those of the conventional cartridge 21 shown in FIG. That is, the cartridge 71 includes the hub 29, the arm 31, and the bottom annular portion 3.
3, a housing 25 including a rib 35, a valve seat member attaching portion 37, a post 39, and the like; a metal ring 43 attached to the valve seat member attaching portion 37 of the housing 25;
A valve seat member 23 comprising a sealing member 47, a covering member 45 having an inner diameter covering portion 49, and an outer end covering portion 51, a valve member 27 guided by a post 39, and a spring as an urging means. 4
1 is provided.

[0015] Cartridge 71 in the present embodiment
Further includes a substantially ring-shaped cover body 73 as an attachment member. The cover body 73 includes the first annular portion 7.
5 and a hole 76 at the center thereof is provided with the opening 2 of the valve seat member 23.
It leads to 4. The second annular portion 79 is the first annular portion 75
It is provided continuously. The size of the inner circumference 80 of the second annular portion 79 is larger than that of the hole 76. The cover 73 further includes a first annular portion 75 to a second annular portion 79.
And a flange 83 that spreads outward on the side opposite to the side. Then, as shown, the inner circumference 8 of the second annular portion 79 is formed.
Numeral 0 is fitted from the outer peripheral portion of the outer end covering portion 51 of the valve seat member 23 to the outer peripheral portion of the metal ring 43 to the covering body 45 or the outer peripheral portion of the valve seat member 23. On the other hand, the first annular portion 75
The side surface on the side of the second annular portion 79 is a contact surface 77 that contacts the outer surface of the outer end covering portion 51.

The cartridge 71 constructed as described above
Is inserted into the main body 2 as in the conventional example. that time,
A male screw 88 formed on the outer periphery of the first annular portion and the second annular portion of the cover body 73 and a female screw 89 formed on the inner peripheral side of the main body 2 are screwed together, and the cartridge 71 is inserted into the main body 2. Let me enter. Then, the bottom annular portion 33 of the housing 25 is brought into contact with the shoulder portion 3 inside the main body 2, and the outer end covering portion 51 of the covering body 45 of the valve seat member is compressed. Thereby, the inner peripheral portion 80 of the second annular portion 79 of the cover body 73 and the first annular portion 7
5 is sealed. The inner surface 84 of the flange 83 contacts the end surface 4 of the main body 2, and
Is restricted from entering the main body 2. Reference numeral 85 denotes an O-ring for sealing disposed on a screw portion where the cover body 73 and the main body 2 are screwed.

The socket 5 is attached to the main body 2 at the screw portion 7 as in the conventional example. At this time, the O-ring 87 received in the groove formed in the outer surface 78 of the first annular portion 75 of the cover 73 is compressed and sealed at this portion.

Incidentally, the outer diameter of the outer end covering portion 51 of the covering body 45 of the valve seat member 23 shown in FIG. 1 is further enlarged, and the inner peripheral portion of the cover body 73 corresponding to this portion is extended in the circumferential direction. An extended groove may be formed, and the enlarged portion of the outer end covering portion 51 may be fitted into this groove, so that the connection between the cover body 73 and the valve seat member 23 can be made more reliable, and Alternatively, mutual detachment during the removal operation can be more reliably prevented.

[0019]

As described above, in the check valve cartridge according to the present invention, unlike the conventional cartridge, the cover that functions to seal the outer periphery and the outer end surface of the seal portion of the valve seat member. Since the body is provided and the cover body is attached to, for example, the end of the pipe, the cartridge can be easily removed, which is extremely convenient for maintenance work or cartridge replacement work.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a simple check valve using a check valve cartridge according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a simple check valve using a conventional check valve cartridge.

[Explanation of symbols]

 Reference Signs List 61 single check valve 71 check valve cartridge 23 valve seat member 25 housing 27 valve body 41 spring 51 outer end covering portion (seal portion) 73 cover body (attachment member) 75 first annular portion 75 second circle Ring part 83 Flange 87 Male thread (Mounting part)

Claims (5)

[Claims] 1. An annular valve seat member forming a central fluid inlet, and the valve seat member is coupled to one end side opening, and is in a non-closed form so as to allow passage of fluid flowing from the inlet. And a housing provided in the housing,
A valve body pressed against the valve seat member by a biasing means, wherein the valve seat member is formed and arranged inside the one end side opening of the housing so that the valve body is detached and seated. And a seal part disposed at the one end of the housing, the check valve cartridge used by being inserted into a water supply pipe or a connection part of equipment, wherein the check valve cartridge is A first annular member having a center hole communicating with the fluid inlet of the valve seat member; and a mounting member for removably mounting the cartridge to the pipe or the connection portion of the device. Department and
A second annular portion formed to be connected to the first annular portion and having an inner diameter larger than the inner diameter of the first annular portion; and an attaching portion attached to a connection portion of the pipe or device. Wherein an inner peripheral surface of the second annular portion is fitted to an outer peripheral portion of the seal portion, and a shoulder portion formed on the second annular portion side of the first annular portion is the shoulder portion. A non-return valve cartridge configured to contact an outer surface of a seal portion. 2. The check valve cartridge according to claim 1, wherein a female screw is formed in a connecting portion of the pipe or the device, and a male screw is formed in a mounting portion of the mounting member. A check valve cartridge characterized by the above-mentioned. 3. The check valve cartridge according to claim 2, wherein the attachment member includes a flange that can abut on an end of the pipe or a connection portion of the device. Valve cartridge. 4. The check valve cartridge according to claim 1, wherein the valve seat portion and the seal portion of the valve seat member are integrally formed. , Check valve cartridge. 5. The check valve cartridge according to claim 4, wherein the valve seat member includes a metal ring, and the valve seat portion formed on one surface side of the ring near an inner peripheral portion thereof.
An inner peripheral covering portion for covering the inner periphery of the ring, and a sealing member formed on the other surface side of the ring, the covering member being formed of a material having elasticity and having a resilience. Characterized by a cartridge for a check valve.