JP2013044418A - Check valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a check valve device which is reduced in manufacturing costs by controlling a pressure loss low when a fluid passes, and reducing the number of components and simplifying a manufacturing process.SOLUTION: A check valve device 1 includes: a tubular body 2; a cylindrical guide member 4 accommodated in the body and including a folded part 4b in which one end is folded inside; a valve element 3 which is accommodated in the guide member and in which the valve opening actuation limit is regulated by the folded part; and a valve seat member 5 mounted in another end of the guide member and including a valve seat 5b connected to and disconnected from the valve element; wherein while accommodating, within the body, a valve assembly 7 comprised of the guide member, the valve element and the valve seat member, either one or both side parts adjacent to a part of the body, in which the valve assembly is accommodated, are subjected to drawing compound, and thereby, the valve assembly is positioned and held within the body. The valve assembly may include a seal member 6 in a recessed groove 5c formed on an outer peripheral surface of the valve seat member, and the leakage of a fluid between an inner peripheral surface of the body and the outer peripheral surface of the valve seat member can be prevented effectively by the seal member.

Description

  The present invention relates to a check valve device used for piping (particularly, a branching portion) of an air conditioning cycle.

Conventionally, in an air-conditioning cycle installed in a building having a large number of rooms, a check valve is used for switching a refrigerant flow path to a pipe (particularly, a branching section). As such a check valve, in Patent Document 1, a valve body having a valve seat portion, a valve body having a valve portion slidably disposed inside the valve body and closing the valve seat portion, A regulating pin that regulates the valve opening operation limit of the valve body, and an engagement means that engages with the regulating pin at the valve opening operation limit of the valve body is provided on the opposite side of the valve portion of the valve body to open the valve body In some cases, a check valve is described in which the valve opening operation limit of the valve body is restricted by a restriction pin, and the rotation of the valve body is prevented by the engaging means.
Japanese Patent No. 3395731

  In the check valve described in Patent Document 1, the valve opening operation limit of the valve element is restricted by the restriction pin. However, since the restriction pin protrudes into the flow path, a fluid such as a refrigerant flows through the flow path. There was a problem that the pressure loss increased.

  In addition, rattling or disengagement of the restriction pin may cause abnormal noise or malfunction, so the restriction pin is fixed to the cylindrical valve body and the valve body is firmly fixed to the tube. There is a need to. As a result, the number of parts increases and the number of steps for manufacturing the check valve increases, leading to an increase in manufacturing cost.

  Therefore, the present invention has been made in view of the problems in the above-described conventional check valve, and suppresses the pressure loss when the fluid passes through the inside of the valve, reduces the number of parts, and reduces the manufacturing process. It aims at providing the non-return valve apparatus with low manufacturing cost by simplifying.

  In order to achieve the above object, the present invention is a check valve device having a tubular main body and a cylindrical guide member accommodated in the main body, wherein one end of the check valve device is bent inward. A valve having a guide member, a valve body accommodated in the guide member, the valve opening limit of which is restricted by the bent portion, and a valve seat that is attached to the other end of the guide member and contacts and separates from the valve body Both sides adjacent to the portion of the main body in which the valve assembly is accommodated in a state where the valve assembly comprising the guide member, the valve body and the valve seat member is accommodated in the main body. The valve assembly is positioned and held in the main body by drawing one or both of the portions.

  And according to this invention, since the valve opening action | operation limit of a valve body is controlled by the bending part formed in the end of a guide member, and this bending part can be formed so that it may protrude only a little into a flow path, The pressure loss during passage can be kept low, and the conventional regulation pin is not required, reducing the number of parts, reducing the man-hours for manufacturing the check valve device, and reducing the manufacturing cost. Can do.

  In addition, a valve assembly including a guide member, a valve body, and a valve seat member is accommodated in the main body, and one or both of both side portions adjacent to the portion where the valve assembly of the main body is accommodated are drawn. Since the valve assembly can be positioned and held in the main body, separate members other than the main body are not required to position and hold the valve assembly, which leads to a reduction in the number of parts and man-hours, and thus the manufacture of check valve devices. Cost can be reduced.

  In the check valve device, the valve assembly may include a seal member in a concave groove formed in an outer peripheral surface of the valve seat member, and the seal member allows the inner peripheral surface of the main body and the valve to be By sealing between the outer peripheral surface of the seat member, fluid leakage between the inner peripheral surface of the main body and the outer peripheral surface of the valve seat member can be effectively prevented.

  As described above, according to the present invention, it is possible to provide a check valve device that has low pressure loss, reduces the number of parts, and simplifies the manufacturing process, thereby reducing manufacturing costs.

It is sectional drawing which shows one Embodiment of the non-return valve apparatus concerning this invention. It is a figure which shows the valve body of the non-return valve apparatus of FIG. 1, Comprising: (a) is a front view, (b) is a left view, (c) is a right view. It is a figure which shows the guide member of the non-return valve apparatus of FIG. 1, Comprising: (a) is sectional drawing, (b) is a left view, (c) is a right view. It is a figure which shows the valve seat member of the non-return valve apparatus of FIG. 1, Comprising: (a) is a partial cross section figure, (b) is a left view, (c) is a right view. FIGS. 4A and 4B are diagrams for explaining a method of manufacturing the guide member in FIG. 3, wherein FIG. 3A is a cross-sectional view illustrating a state before bending an end portion, and FIG. (C) is an enlarged view of the end part after a bending process, (d) is an expanded sectional view which shows the state which the valve body contact | abutted to the edge part. It is explanatory drawing of the drawing process for accommodating the valve assembly of the non-return valve apparatus of FIG. 1 in a main body, and hold | maintaining positioning, (a) is a state before accommodating a valve assembly in a main body. FIG. 5B is a cross-sectional view showing a state in which the main body is drawn after the valve assembly is accommodated in the main body. It is sectional drawing for demonstrating operation | movement of the non-return valve apparatus of FIG.

  Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In the following description, the case where the refrigerant is allowed to flow in a certain direction using the check valve device according to the present invention will be described as an example.

  FIG. 1 shows an embodiment of a check valve device according to the present invention. The check valve device 1 includes a tubular body 2, a valve body 3 inside the body 2, and a valve body 3. A cylindrical guide member 4 for guiding the valve body 3 in the horizontal direction, a valve seat member 5 provided with a valve seat 5b to which the valve portion 3a of the valve body 3 contacts and separates, and an outer peripheral surface of the valve seat member 5 A unitized valve assembly 7 constituted by a seal member 6 arranged between the inner surface of the main body 2 is arranged.

  The main body 2 is made of a copper pipe or the like, and has a large diameter portion 2a that accommodates the valve assembly 7, and small diameter portions 2b and 2c that are located on both sides of the large diameter portion 2a and form an inlet port 2f and an outlet port 2g, It is comprised by the taper parts 2d and 2e which exist between these and the large diameter part 2a.

  The valve body 3 is made of resin, and as shown in FIG. 2, the valve body 3 has a valve portion 3a at the left end portion, and four blade-like portions 3b are connected to the cylindrical portion 3c.

  As shown in FIG. 3, the guide member 4 is made of metal and includes a cylindrical base portion 4a having both ends opened and a bent portion 4b bent inward at the right end portion of the base portion 4a.

  As shown in FIG. 4, the valve seat member 5 is made of resin or the like, and accommodates a cylindrical base portion 5 a having both ends opened, a valve seat 5 b positioned at the right end portion of the base portion 5 a, and a seal member 6. And a concave groove 5c.

  In manufacturing the guide member 4, for example, as shown in FIG. 5, a jig 10 having a columnar small diameter portion 10a and a columnar large diameter portion 10b is used, and the small diameter portion 10a is made of metal. The bent portion 4b can be formed by mounting the cylindrical member 4 ′ and bending the right end portion.

  According to this method, bending is performed at the corner R portion 10c of the small-diameter portion 10a of the jig 10 in a state where there are no other parts inside the guide member 4, as shown in FIG. The R portion having a desired small diameter can be formed with high accuracy, and, as shown in FIG. 5 (d), in the state where the valve body 3 accommodated in the guide member 4 has reached the valve opening operation limit, The contact length L for taking a sufficient contact area between the bent portion 4b and the blade-like portion 3b of the valve body 3 is set to the minimum length of the bent portion 4b (the minimum length necessary for obtaining a predetermined bend R). ) And the valve opening operation of the valve body 3 can be regulated with certainty. Further, in this processing method, the length of the bent portion 4b can be minimized and the protruding length of the bent portion 4b to the flow path side can be kept short, so that the pressure loss due to the bent portion 4b when the refrigerant R passes is reduced. It can be kept low.

  In order to assemble the check valve device 1, first, as shown in FIG. 6A, the small diameter portion 2 b and the tapered portion 2 d of the main body 2 are formed by drawing, and the valve assembly is formed from the right opening 2 j of the main body 2. The solid 7 is inserted into the main body 2. Next, as shown in FIG. 6B, in a state where the main body 2 is held by the holders 11 and 12, a cylindrical jig 13 is inserted into the main body 2 through the right opening 2j, and the roller 14 is used. The tapered portion 2e and the small diameter portion 2c are drawn to complete the assembly of the check valve device 1.

  As described above, since the valve assembly 7 can be positioned and held inside the main body 2 simply by drawing the main body 2, the manufacturing process is simplified and the manufacturing cost of the check valve device is reduced. Can be suppressed.

  As shown in FIG. 1, in the check valve device 1, the valve portion 3 a of the valve body 3 contacts the valve seat 5 b of the valve seat member 5 in a state where the pressure of the outlet port 2 g is higher than the pressure of the inlet port 2 f. Thus, the valve port 2h is closed and the flow of the refrigerant R is blocked.

  When the pressure at the inlet port 2f becomes higher than the pressure at the outlet port 2g from the state shown in FIG. 1, the valve body 3 moves to the right along the inner surface 4c of the guide member 4 as shown in FIG. The part 3a is separated from the valve seat 5b, the valve port 2h is opened, and the refrigerant R flows through the space between the four blade-like parts 3b as indicated by the arrows in the main body 2. The valve body 3 can abut on the bent portion 4b to restrict the valve opening operation limit.

  In the above embodiment, the valve assembly 7 is configured by the valve body 3, the guide member 4, the valve seat member 5, and the seal member 6. However, the valve body 3, the guide member 4, It is also possible to form the valve assembly 7 with the seat member 5 and provide the seal member 6 separately from the valve assembly 7.

DESCRIPTION OF SYMBOLS 1 Check valve apparatus 2 Main body 2a Large diameter part 2b, 2c Small diameter part 2d, 2e Taper part 2f Inlet port 2g Outlet port 2h Valve port 2j Right opening 3 Valve body 3a Valve part 3b Blade-like part 3c Cylindrical part 4 Guide member 4a Base part 4b Bent part 4c Inner surface 4 'Cylindrical member 5 Valve seat member 5a Base part 5b Valve seat 5c Concave groove 6 Seal member 7 Valve assembly 10 Jig 10a Small diameter part 10b Large diameter part 10c R part 11, 12 Holder 13 Jig 14 Roller

Claims (2)

A tubular body;
A cylindrical guide member accommodated in the main body, the guide member having a bent portion with one end bent inward;
A valve body housed in the guide member, the valve opening limit of which is restricted by the bent portion;
A valve seat member mounted on the other end of the guide member and provided with a valve seat that contacts and separates from the valve body;
In a state in which the valve assembly including the guide member, the valve body, and the valve seat member is accommodated in the main body, either one of both side portions adjacent to the portion in which the valve assembly is accommodated in the main body or A check valve device characterized in that the valve assembly is positioned and held in the main body by drawing both.   The valve assembly includes a seal member in a concave groove formed on the outer peripheral surface of the valve seat member, and seals between the inner peripheral surface of the main body and the outer peripheral surface of the valve seat member by the seal member. The check valve device according to claim 1.

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