JP2008240741A - Check valve device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily perform maintenance work such as washing of a pipe body and a check valve device and to easily perform disassembling/assembling work accompanying it by easily performing removal and assembling of the check valve device from the pipe body, in the front pressure closure type check valve device. <P>SOLUTION: The check valve device (A) is provided with a valve element retaining body (5) attachable/detachable to connector pipes (1, 2) and provided with a valve seat (51); a valve rod (60); a valve element (6) having a valve head (61) provided on the valve rod (60) slidably attached while penetrating through the valve element retaining body (5); and a valve spring (7) for urging the valve element (6) in a direction that the valve head (61) closes the valve seat (51) of the valve element retaining body (5). On the valve element retaining body (5), a feed port (54) communicated with the valve seat (51) from the opposite side to the valve seat (51) in a circulation direction is provided. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a check valve device. More specifically, for example, in a front pressure blocking type check valve device, the check valve device can be easily removed from the tube as a unit, and maintenance work such as cleaning of the tube and the check valve device, Further, the present invention relates to an apparatus that can be easily disassembled and assembled accordingly.

  For example, in a device that stores liquid food having fluidity in a tank and stirs the food by ejecting air into the food, a check valve device that prevents liquid food from leaking out of the tank from the air supply unit. in use. Such a check valve device includes a back pressure closing type (for example, Japanese Patent Laid-Open No. 2001-99350) in which the valve seat is closed by receiving pressure from the back side of the valve head with respect to the valve head of the valve body. There is a front pressure blocking type (for example, Japanese Patent No. 2600488) in which the valve seat is closed by receiving pressure from the front side of the valve head. In addition, FIG. 11 is shown as a general structure of the front pressure block type.

Since the back pressure check type check valve device normally has a valve body and a valve body support mechanism in a flow path on one side of a valve seat provided in the pipe body, When cleaning the valve device, the valve body and the valve body support mechanism portion can be detached from the tube body as a whole, and can be integrated as well. Thereby, the cleaning work and the accompanying disassembly and assembly work can be easily performed.
Japanese Patent No. 2600488

  On the other hand, in the front pressure blocking type check valve device described in Patent Document 1, the valve head of the valve body and the valve body support mechanism are disposed on both sides of the valve seat provided on the pipe body. (See also FIG. 11). For this reason, when cleaning the pipe body and the check valve device, the valve body and the valve body support mechanism must be disassembled in order to remove the check valve device from the pipe body. Also need to assemble this. As described above, the front pressure blocking type check valve device requires a long time and requires much time for the cleaning work and the disassembly and assembly work associated therewith, compared with the back pressure blocking type check valve device. .

  In addition, as shown in Patent Document 1 and FIG. 11, the conventional front pressure check type check valve device is provided with a flow hole in the valve body holder that supports the valve body, and ensures a sufficient flow rate. For this purpose, a large number of flow holes are provided. In the processing process of these flow holes, it is indispensable to chamfer to remove burrs on the hole edge. However, since this chamfering cannot be automated, it is all manual work. Therefore, many steps are required for forming the valve body holder, and it takes time.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is, for example, in a front pressure blocking type check valve device, so that the check valve device can be easily removed from the flow path and incorporated into the flow path, so that the flow path and the check valve It is intended to facilitate maintenance work such as cleaning of the apparatus and the accompanying disassembly and assembly work.

  In addition to the above object, another object of the present invention is that the valve body holder can be easily formed with fewer steps compared to the conventional structure in which a large number of flow holes are provided in the valve body holder. Is to do so.

Means taken by the present invention to solve the above problems are as follows.
The present invention
A check valve device that can be combined with a valve body and a valve seat and integrated into the flow path or taken out of the flow path as an integrated object,
A valve body holder provided with a valve seat;
A valve body, and a valve body having a valve head provided on the valve body, and slidably mounted through the valve body holder;
A biasing means for biasing the valve body in a direction in which the valve head closes a valve seat of the valve body holding body;
With
The valve body holder is a check valve device provided with a supply port that leads to the valve seat from the side opposite to the valve seat in the flow direction.

The check valve device of the present invention is
The valve body holder includes a flow path forming portion having a valve seat side flow channel that protrudes toward the valve stem and is recessed inside, and a large-diameter portion and a cutout portion are provided on a side surface of the flow path forming portion. It is preferable that a supply port leading to the valve seat side flow path in the flow path forming portion is formed in the notch portion.

The present invention
A check valve structure in which any one of the above-described check valve devices is housed in a joint portion of a flow channel pipe joined in an airtight or liquid tight manner.

(Function)
The operation of the check valve device according to the present invention will be described. Note that, here, each constituent element of the present invention is given and described in correspondence with the reference numerals given to the respective parts in the embodiments described later, but this provision of reference numerals is only for easy understanding of the explanation. However, it does not mean that the constituent elements are limited to the above-described parts.

The valve body (6) of the check valve device (A) is urged in the closing direction by the urging means (7), and the valve head (61) is normally in the valve seat of the valve body holder (5). (51) is blocked.
For example, when the pressure of the fluid is received from the back side of the valve head (61) and this pressure exceeds the combined force of the urging force of the urging means (7) and the pressure by the fluid received from the front side of the valve head (61), The valve body (6) slides in the direction in which the valve seat (51) opens, the fluid passes through the valve seat (51) opened from the flow path pipe (1), and the flow path on the opposite side across the valve seat (51) Sent to tube (2).

  When the supply of the fluid for opening the valve seat (61) is stopped, the valve body (61) is caused by the urging force of the urging means (7) and the pressure by the fluid that the valve head (61) receives from the front side. The valve seat (51) of (5) is slid in the closing direction, and the valve head (61) closes the valve seat (51). Thereby, the back flow of the fluid which applies pressure to the valve head (61) from the front side does not occur.

  When cleaning the flow path pipe (1, 2) to which the check valve device (A) is attached and the check valve apparatus (A), first fix both flow path pipes (1, 2). Remove the fasteners and separate the flow pipe (1, 2) and packing. Next, the check valve device (A) is integrated with the flow pipe (1) by removing the valve body holder (5) attached to the flow pipe (1, 2) from the flow pipe (1). ) Can be removed. In addition, the check valve device (A) can be integrated into the flow channel pipe (1) during assembly. As a result, it is possible to easily perform the cleaning operation and the accompanying disassembly / assembly operation.

  For example, a valve body holding body is formed by first forming a disk-shaped mounting portion and a columnar portion serving as a flow path forming portion and a columnar portion serving as an insertion portion on one side of the mounting portion, and the center of the columnar portion serving as the insertion portion. In addition, a hole is formed so as to penetrate the entire front and back surfaces, and a valve seat side flow path that is concentric with the hole and has a large diameter is formed from the surface side of the mounting portion to the cylindrical portion side that becomes the flow path forming portion. In addition, the notch portion is provided by cutting the required portion of the cylindrical portion that becomes the flow path forming portion so that the cylindrical portion that becomes the insertion portion remains, and is applied to the valve seat side flow passage, The check valve device (A) according to claim 2, which is obtained by forming a supply port leading to the valve seat side flow path, can substantially automate the manufacturing process of the valve body holder by an NC machine tool or the like. As a result, the number of steps required for human hands is reduced, and the valve body holder (5) can be easily manufactured.

(A) In the check valve device of the present invention, for example, when the check pipe device and the check valve device are cleaned, first, a clamp that fixes both the flow pipes. The check valve device can be removed from the flow path pipe as a whole by removing the valve body, separating the flow path pipe and the packing, and then removing the valve body holder attached to the flow path pipe. In addition, the check valve device can be integrated into the flow channel pipe during assembly. As a result, it is possible to easily perform the cleaning operation and the accompanying disassembly / assembly operation.

(B) Since the check valve device according to claim 2 can substantially automate the manufacturing process of the valve body holding body by using an NC machine tool or the like, the number of processes required by humans is reduced, and the valve body holding body can be simplified. Can be manufactured.

The present invention will be described in detail based on the embodiments shown in the drawings.
FIG. 1 shows an embodiment of a check valve device according to the present invention, and is a cross-sectional explanatory view of a structure in which the check valve device is attached to a joint pipe.
2 is an exploded perspective view of the structure of FIG.
3 shows a perspective view of the check valve device, (a) is a front perspective view, (b) is a rear perspective view,
FIG. 4 is a front view of the check valve device,
FIG. 5 is a rear view of the check valve device,
FIG. 6 is a plan view of the check valve device,
FIG. 7 is a bottom view of the check valve device,
FIG. 8 is a right side view of the check valve device,
FIG. 9 is a left side view of the check valve device.
The sectional direction of the valve body holder in FIG. 1 is shifted by 90 ° in the axial circumferential direction on the upper side and the lower side of the valve body for convenience of illustration.

  As shown in FIG. 1, the check valve device A is housed and incorporated in a joint portion of joint pipes 1 and 2 that are flow path pipes. The joint pipes 1, 2 are watertight by interposing the packing 3 between the joint flanges 10, 20, and further applying a force so as to press the packing 3 with the joint flanges 10, 20 by the fasteners 4. It is joined to. In addition, since such a joining structure is a very general structure, description is abbreviate | omitted about a detailed structure.

The check valve device A includes a valve body holding body 5, a valve body 6 inserted through the valve body holding body 5 so as to be movable back and forth, and a valve spring 7 that biases the valve body 6.
The valve body holder 5 has a disk-shaped mounting flange 50. The outer diameter portion of the mounting flange 50 is formed so as to be accommodated inside the accommodating recess 11 provided on the end surface of the joint flange 10 of the joint pipe 1 on the one side.
In the central portion of the mounting flange 50, a valve seat side flow channel 57 is provided to be depressed over a flow channel forming portion 53, which will be described later, and a circular valve seat surface 52 is formed on the entire periphery of the mouth portion. Thereby, the valve seat 51 is provided.

  A flow path forming portion 53 projects from a central portion of the mounting flange 50 on the side opposite to the valve seat surface 52. The large diameter portion 531 of the flow path forming portion 53 is formed so that it can be fitted into the inner diameter portion of the joint tube 1 with almost no gap. The rising portion of the flow path forming portion 53 is provided with a notch portion 532 by cutting the large diameter portion 531 at two opposite positions.

  Each notch 532 is formed with a supply port 54 that communicates with the valve seat side flow path 57. The notch 532 and the supply port 54 are not limited to two places, respectively, and can be provided at one place or three or more places in consideration of the flow rate and strength. Further, a circular tubular insertion portion 55 having a guide hole 56 through which a valve rod 60 of the valve body 6 described later can be slidably inserted is provided at the center of the flow path forming portion 53.

Here, the process of manufacturing the valve body holder 5 by cutting will be described. The valve body holder 5 can be manufactured by casting.
(1) A disk-shaped mounting flange 50, a protruding portion (for example, a cylindrical portion) that becomes the flow path forming portion 53 on one side of the mounting flange 50, and a protruding portion (for example, a cylindrical portion) that becomes the insertion portion 55 thereon ).
(2) A guide hole 56 is formed at the center of the protruding portion serving as the insertion portion 55 so as to penetrate the entire front and back surfaces.
(3) The valve-seat-side flow path 57 that is concentric with the guide hole 56 and larger in diameter than the guide hole 56 is extended from the surface side of the mounting flange 50 (the right side surface in FIG. 1) to the protruding portion that becomes the flow path forming portion 53. Form. A valve seat surface 52 is formed at the mouth edge of the valve seat side flow path 57, thereby forming the valve seat 51.

(4) Depth of the large diameter portion 531 of the flow path forming portion 53 so that the protruding portions that become the insertion portions 55 remain at two opposite positions in the diametrical direction and to the vicinity of the surface of the mounting flange 50. Are cut in parallel to form a notch 532. Each notch 532 is applied to a valve seat side flow path 57 formed from the surface side of the mounting flange 50 to the flow path forming portion 53, whereby the notch portion 532 of the flow path forming portion 53 is connected to the valve seat side. A supply port 54 communicating with the flow path 57 is formed.

  It should be noted that the size of the supply port 54 that affects the flow rate can be appropriately set by adjusting the height of the protruding portion that becomes the flow path forming portion 53, the size of the cutout portion 532, and the like. Moreover, since the manufacturing process of the said valve body holding body 5 can be automated by NC machine tools etc., the valve body holding body 5 can be manufactured easily.

  The valve body 6 inserted through the valve body holding body 5 is a rod body having a circular cross section (round bar shape) and a valve rod 60 having a required length. A valve head 61 is provided at one end of the valve stem 60. The front side of the valve head 61 (the right side in FIG. 1 where the fluid pressure is applied in the flow path formed by the joint pipes 1 and 2) is formed in a conical surface shape, and on the opposite side is a partial conical surface shape. A close contact surface 62 is formed.

  The valve body 6 is incorporated in the valve body holder 5 by inserting the valve rod 60 from the valve seat surface 52 side. The valve body 6 closes the valve seat 51 by bringing the contact surface 62 of the valve head 61 into close contact with the valve seat surface 52 provided on the valve seat 51 of the valve body holder 5 (the valve of the valve seat 51). The seat side channel 57 can be closed).

  A substantially circular spring stopper 63 is fitted to the valve stem 60 so as to be movable back and forth in the axial direction of the valve stem 60. A large-diameter stopper 64 is provided at one end of the small-diameter part (reference numeral omitted) of the spring stopper 63. Further, a screw portion 65 is provided at the other end portion of the valve stem 60, and a nut 66 is screwed to the screw portion 65. The nut 66 can be adjusted to advance and retract in the axial direction of the valve rod 60, thereby adjusting the strength of a valve spring 7 (biasing force against the valve body 6) described later.

  A valve spring 7, which is a coil spring, is fitted into the small diameter portion of the spring stopper 63 and the insertion portion 55. The valve spring 7 constitutes an urging means. One end of the valve spring 7 is in contact with the stopper 64 of the spring stopper 63, and the other end is in contact with the end face of the flow path forming part 53 located at the base of the insertion part 55. The valve body 6 normally closes the valve seat 51 by bringing the contact surface 62 of the valve head 61 into close contact with the valve seat surface 52 of the valve seat 51 by the biasing force of the valve spring 7.

(Function)
FIG. 10 is an explanatory view showing a use state of the check valve device.
The operation of the check valve device A will be described with reference to FIGS. The apparatus shown in FIG. 10 is an agitation tank apparatus 8 that agitates liquid food stored in the tank with high-pressure air.

  As shown in FIG. 1, the valve body 6 of the check valve device A that is housed and attached to the joint portion of the joint pipes 1 and 2 connected to the tank 80 of the stirring tank device 8 is closed by the valve spring 7. The valve head 61 normally closes the valve seat 51 of the valve body holder 5 (the state shown in FIG. 1).

  From this state, for example, when the pressure of the high pressure air is received from the back side of the valve head 61 and the pressure of the high pressure air exceeds the combined force of the urging force of the valve spring 7 and the pressure of the liquid food received by the valve head 61 from the front side. The valve body 6 slides in the direction in which the valve seat 51 opens, and high pressure air is sent from the joint pipe 1 through the opened valve seat 51 to the joint pipe 2 side, which is the opposite flow path across the valve seat 51. It is done. Further, the high-pressure air is sent to the tank 80, and the liquid food is agitated by aeration.

  When the supply of high-pressure air is stopped to stop stirring, the valve body 6 closes the valve seat 51 of the valve body holding body 5 by the biasing force of the valve spring and the pressure of the liquid food received from the front side of the valve head 61. The valve head 61 closes the valve seat 51. Thereby, the backflow of the liquid food which applies pressure to the valve head 61 from the front side does not occur.

  When cleaning the joint pipes 1 and 2 to which the check valve apparatus A is attached and the check valve apparatus A, first, the fastener 4 that fixes both the joint pipes 1 and 2 is removed, and the joint pipe is removed. 1 and 2 and packing 3 are separated. Next, the valve body holder 5 attached to the joint pipe 1 on one side is removed from the housing recess 11 of the joint pipe 1. In the check valve device A, since the component parts such as the valve body holding body 5 having the valve seat 51, the valve body 6 and the valve spring 7 are integrally formed, the check valve device A is integrally formed from the joint pipe 1. Can be removed. In addition, the check valve device A can be incorporated as an integral part during assembly. As a result, it is possible to easily perform the cleaning operation and the accompanying disassembly / assembly operation.

  Note that the terms and expressions used in the present specification are merely explanatory and not restrictive, and do not exclude terms and expressions equivalent to the above terms and expressions. The present invention is not limited to the illustrated embodiment, and various modifications can be made within the scope of the technical idea.

Sectional explanatory drawing of the structure which showed one Embodiment of the non-return valve apparatus which concerns on this invention, and attached the non-return valve apparatus to the joint pipe, 1 is an exploded perspective view of the structure of FIG. The perspective view of a non-return valve apparatus is shown, (a) is a front side perspective view, (b) is a back side perspective view. The front view of a non-return valve apparatus. The rear view of a non-return valve apparatus. The top view of a non-return valve apparatus. The bottom view of a non-return valve apparatus. The right view of a non-return valve apparatus. The left view of a non-return valve apparatus. Explanatory drawing which shows the use condition of a non-return valve apparatus. Cross-sectional explanatory drawing which shows the structure of the conventional check valve.

Explanation of symbols

A Check valve device 1, 2 Joint pipe 10, 20 Joint flange 11 Housing recess 3 Packing 4 Fastening tool 5 Valve body holder 50 Mounting flange 51 Valve seat 52 Valve seat surface 53 Flow path forming portion 531 Large diameter portion 532 Notch Portion 54 Supply port 55 Insertion portion 56 Guide hole 57 Valve seat side flow path 6 Valve body 60 Valve rod 61 Valve head 62 Contact surface 63 Spring stopper 64 Stopping portion 65 Screw portion 66 Nut 7 Valve spring 8 Stirring tank device 80 Tank

Claims (3)

This is a check valve device that combines a valve body (6) and a valve seat (51) into a single body, and can be incorporated into the flow path (1, 2) or taken out from the flow path (1, 2) as a single body. And
A valve body holder (5) provided with a valve seat (51);
A valve disc (6) having a valve stem (60) and a valve head (61) provided on the valve stem (60) and slidably mounted through the valve disc holder (5) )When,
An urging means (7) for urging the valve body (6) in a direction in which the valve head (61) closes the valve seat (51) of the valve body holding body (5);
With
The valve body holder (5) is provided with a supply port (54) that communicates with the valve seat (51) from the opposite side of the valve seat (51) in the flow direction.
Check valve device. The valve body holder (5) includes a flow path forming part (53) having a valve seat side flow path (57) protruding toward the valve stem (60) and recessed therein, and the flow path forming part (53 ) Is provided with a large diameter portion (531) and a notch portion (532), and the notch portion (532) is a supply port that communicates with the valve seat side flow path (57) in the flow path forming section (53). (54) is formed,
The check valve device according to claim 1. The check valve device (A) according to claim 1 or 2 is housed in a joint portion of the flow channel pipes (1, 2) joined in an airtight or liquid tight manner.
Check valve structure.

Images