KR101375824B1 - Check valve - Google Patents

Abstract

The present invention relates to a check valve. According to the present invention, a male cone surface is formed in the actuator and a valve-shaped cone surface corresponding to the male cone surface is formed to operate even when the actuator is lowered in an inclined state within a tolerance range without being vertically lowered when the actuator is closed. Since the male cone surface of the sieve and the female cone surface of the valve seat are in close contact with each other, the automatic cone action between the male cone surface and the female cone surface ensures that the male cone surface and the female cone surface are closely contacted with each other without creating a gap therebetween, so that fluid leakage is reliably prevented and checked. Functions as a valve can be faithfully performed, and the closing force exerted on the valve seat by the opening and closing plate is sprayed by the male cone surface of the opening and closing plate and the female cone surface of the valve seat and distributed to the valve seat and the valve seat support ring. Service life by minimizing damage to valve seat Is formed at the top and inserted into the lower end of the valve seat support ring through the inlet, without using a separate union joint that allows to extend, and increase the installation height of the check valve, formed at the bottom A connection pipe having a male screw portion connected to a pipe line and the like, and a locking piece formed between the insertion portion and the male screw portion; Installation of a check valve further comprises a union connector including a locking jaw formed at a lower end and a locking jaw caught by the locking piece and a female nut formed at an upper end and screwed to a male thread formed on an outer circumferential surface of the inlet. By lowering the height, it is possible to eliminate the interference with the surrounding equipments, and in connection with the pipe line, etc., the valve body can be installed to face the desired direction.

Description

Check valve

The present invention relates to a check valve, and more specifically, the opening and closing operation is made precisely, and the leakage is reliably prevented in the closed state, and the damage of the valve seat is prevented by dispersing the closing force applied to the valve seat to prevent the service life. It extends and relates to a check valve which makes installation very simple.

Check valve is a valve that allows the flow of the fluid in one direction only, it is required that the opening and closing operation is accurate, there should be no fluid leakage in the closed state, and the installation is easy.

In order to meet this demand, the present inventor (applicant) has developed a "check valve having a multi-directional flow path" of the Republic of Korea Patent Application No. 2010-0026362.

6 and 7, the check valve of the preceding application has a valve body 1 having a single inlet 1a and a plurality of outlets 1b, and an inner side of the inlet 1a. The spherical plate 4a which is operated at the upper seat 2a and the lower seat 2b provided at the end and the inner space S of the valve body 1 and is in close contact with the upper seat 2a by the spring 3. It is a structure including an actuator (4) having a).

The check valve of the preceding application has a favorable reputation from users because it has the advantage of reducing the flow resistance and noise due to less influence of the vortex on the multi-directional flow path.

The present inventors have continued to study the check valve of the present invention, and as a result of the contact between the upper seat (2a) and the spherical plate (4a) is formed by the spherical surface (4b) is not closed correctly occurs It has been found that there is a problem of losing its function as a check valve.

That is, the stem 4c constituting the actuator 4 is configured to be guided to the guide ring 1d of the support 1c formed on the valve body 1, but between the stem 4c and the guide ring 1d. According to the tolerance, the actuator 4 can be operated in an inclined state rather than being operated in a straight line. In this case, the spherical surface 4b of the spherical plate 4a is the spherical contact surface 2c of the upper sheet 2a. The contact between the spherical surface 4b of the spherical plate 4a and the spherical contact surface 2b of the upper sheet 2a causes a leakage of fluid, resulting in loss of function as a check valve. There is this.

In addition, the spherical surface 4b of the spherical plate 4a comes into contact only with the spherical contact surface 2b of the top sheet 2a. Generally, the top sheet 2a is made of a resin material having heat resistance, chemical resistance, abrasion resistance, and high elasticity. Although it is configured, there is a problem in that it is easily damaged by the repeated operation of the check valve and shortens the life of the check valve.

In addition, the check valve of the preceding application has a male screw portion 1e formed at the lower end of the valve body 10 for coupling to an installation object such as an automatic control pump or a piping line. However, when the male screw portion 1e is directly screwed to the female screw portion of the installation object by using the male screw portion 1e formed at the lower end of the valve body 1, the direction of the check valve is always constant. Since it is fastened in a different direction every time, the check valve can be fastened in a desired direction through a separate union between the male screw portion 1e and the female screw portion of the installation object.

The union used here consists of a first member which is fastened to the female threaded portion of the installation object and a second member which is rotatably coupled to the first member and fastened to the male threaded portion 1e of the valve body 1. When installed on the installation object is the installation height of the check valve is high, thereby causing problems such as causing interference with the surrounding equipment depending on the conditions of the installation location.

Accordingly, it is an object of the present invention to provide a check valve that can be accurately opened and closed and prevents leakage in a closed state.

Another object of the present invention is to provide a check valve in which the closing force applied to the valve seat is dispersed to prevent damage to the valve seat, thereby extending the service life.

Still another object of the present invention is to provide a check valve that facilitates installation of an installation object, minimizes the height of installation, excludes interference with surrounding facilities, and allows installation in a desired direction.

The present invention to achieve the above object, the valve body having an inlet and at least one outlet; An actuator having an opening and closing plate for opening and closing the inlet, and a male conical surface formed along an outer circumference of the opening and closing plate; A ring-shaped valve is provided between the inner end of the inlet of the valve body and the upper portion of the valve seat support ring, and has a conical surface that is in contact with the male cone surface of the opening and closing plate, and is coupled to an upper surface of the valve seat support ring. Sheet; A valve seat support ring having an outer circumferential surface coupled to an inner end of the inlet of the valve body and having a contact portion in which the male conical surface of the opening and closing plate contacts; And an elastic member installed between the opening / closing plate of the actuator and the support of the valve body to elastically support the opening / closing plate in a closed direction to block the inflow of fluid.

The valve seat may be coupled to a valve seat support ring coupled to the inlet end of the valve body.

The valve seat support ring preferably includes a contact portion for contacting the male cone surface of the opening and closing plate, such that the male cone surface of the opening and closing plate contacts the contact portion at the same time as the male cone surface of the valve seat.

The contact portion may be configured in the form of a circular rim surface or may be formed of a female cone surface located on an extension surface of the female cone surface of the valve seat.

A coupling protrusion is formed on a lower surface of the valve seat, and a coupling groove corresponding to the coupling protrusion is formed on an upper surface of the valve seat support ring.

A connection part formed at an upper end and inserted into the lower end of the valve seat support ring through the inlet part, a male thread part formed at a lower part connected to a pipe line, and a hook piece formed between the insertion part and the male thread part; Tube; And a connection nut having a locking jaw formed at a lower end thereof and having a female screw formed on the upper end of the locking jaw formed at the upper end and screwed to a male thread formed on the outer circumferential surface of the inlet by a left screw. Can be configured.

Between the upper inner circumferential surface of the connecting nut and the outer peripheral surface of the inlet of the valve body is inserted a stop ring which is caught on the upper end of the male threaded portion of the inlet, and when the connecting nut is turned 1/2 to 1 turn in the release direction, it is no longer released. Rotate 1/2 to 1 turn in the tightening direction so that it is completely tightened.

According to the present invention, a male cone surface is formed in the actuator and a valve-shaped cone surface corresponding to the male cone surface is formed to operate even when the actuator is lowered in an inclined state within a tolerance range without being vertically lowered when the actuator is closed. Since the male cone surface of the sieve and the female cone surface of the valve seat are in close contact with each other, the automatic cone action between the male cone surface and the female cone surface ensures that the male cone surface and the female cone surface are closely contacted with each other without creating a gap therebetween, so that fluid leakage is reliably prevented and checked. The function as a valve can be faithfully performed.

In addition, the present invention, the opening and closing plate and the valve seat is in contact with the male cone surface and the male cone surface bar, the closing force applied to the valve seat by the vertically closed valve seat in the process of closing the valve according to the oblique surface of the magnetic cone surface Since the first inclination component and the second inclination component perpendicular to the first inclination component are dispersed, the damage of the valve seat made of resin material can be minimized, and the male cone surface of the opening / closing plate is formed on the conical surface of the valve seat. At the same time being in close contact with the contact portion of the valve seat support ring, the contact pressure applied between the male cone surface of the opening and closing plate and the female cone surface of the valve seat by the elastic member is distributed to the valve seat support ring through the contact portion, thereby repeatedly opening and closing It is possible to minimize the damage of the valve seat due to the operation and to extend the service life.

In addition, the present invention is formed on the upper end is inserted into the lower end of the valve seat support ring through the inlet and the bottom is formed without using a separate union joint that causes the installation height of the check valve, the pipe A connecting pipe having a male screw portion connected to a line or the like and a catching piece formed between the insertion portion and the male screw portion; Installation of a check valve further comprises a union connector including a locking jaw formed at a lower end and a locking jaw caught by the locking piece and a female nut formed at an upper end and screwed to a male thread formed on an outer circumferential surface of the inlet. By lowering the height, it is possible to eliminate the interference with the surrounding equipment, and when installing the pipe line or the like, the valve body can be connected to face the desired direction.

1 to 6 show a first preferred embodiment of the check valve according to the present invention,
1 is a longitudinal front view of a check valve according to the present invention;
2 is a sectional view taken along the line AA in Fig. 1,
3 is a plan view of a check valve according to the present invention;
4 is an exploded perspective view,
5 is an exploded cross-sectional view,
6 is a longitudinal front view of a conventional check valve;
7 is a plan view of a conventional check valve.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the check valve according to the present invention will be described in detail.

The check valve according to the present embodiment includes a valve body 10 having an inlet part 11, an outlet part 12, and an inner space S; An actuator 20 installed to be elevated in the internal space S to open and close the inlet 11; A valve seat 30 provided inside the inlet part 11 of the valve body 10 and normally closed by the actuator 20; It includes; the elastic member 40 for elastically supporting the actuator 20 in the normally closed direction.

The valve body 10 may be provided with one inlet 11 and one outlet 12, respectively, and the outlet 12 is the main outlet as necessary, and the auxiliary outlet 13, 14, 15) may be further provided.

The outlet 12 may be connected to a main fluid line, and the auxiliary outlets 13, 14, and 15 may be connected to an auxiliary fluid line or a pressure gauge, a flow meter, a flow switch, or the like.

Internal threaded portions 12a, 14a, and 15a for connecting a pipe line and a pressure gauge are formed on the inner circumferential surfaces of the outlet 12 and the auxiliary outlets 14 and 15, respectively, and the outer peripheral surface of the auxiliary outlet 13 is formed. The male screw portion 13a for connecting the piping line is formed.

do. In addition, hexagonal portions 12b and 13b are formed on the outer circumferential surfaces of the outlet 12 and the auxiliary outlet 13.

An inner space S of the valve body 10 is provided with a guide ring 16 for guiding the actuator 20 to be elevated. The guide ring 16 is integrally formed on the valve body 10 through a plurality of supporters 17 (three in the figure) extending from the inner circumferential surface of the inner space S.

The actuator 20 is coupled to the opening and closing plate 21 for opening and closing the inlet portion 11, the stem 25 is coupled to the upper surface of the opening and closing plate 21 is supported by the valve body 10 in a linear motion. ).

The opening and closing plate 21 has a male conical surface 22 formed along the outer circumference.

The upper surface of the opening and closing plate 21 is formed with an elastic member support groove 23 for supporting the lower end of the elastic member 40.

The lower surface of the opening and closing plate 21 is formed to form a concave surface 24 so that the inlet pressure of the fluid flowing through the inlet 11 is sufficiently transmitted to the opening and closing plate 21.

The valve seat 30 is coupled to the inner end of the inlet 11 and has a conical surface 31 corresponding to the male conical surface 22 of the actuator 20.

The male conical surface 22 of the opening and closing plate 21 and the female conical surface 31 of the valve seat 30 are opened and closed by self-alignment of the actuator 20 with respect to the valve seat 30. It is intended to be accurate and to prevent the leakage in the closed state.

The valve seat 30 is formed in a ring shape by the resin material having a heat resistance, chemical resistance, wear resistance, high elasticity, the valve seat 30 is directly coupled to the inner end of the inlet 11 of the valve body (10). As shown in the drawing, the outer circumferential surface of the valve seat support ring 33 is coupled to the inner end of the inlet 11 of the valve body 10 so as to be coupled to the upper surface of the valve seat support ring 33. desirable.

The valve seat support ring 33 has a contact portion 34 at which the male conical surface 22 of the opening and closing plate 21 is in contact with an upper end thereof, so that the male conical surface 22 of the opening and closing plate 21 is the valve seat. It is preferable to minimize the damage to the valve seat 30 so that the service life is extended by making contact with the contact portion 34 at the same time as contacting the female cone surface 31 of the (30).

The contact portion 34 may be configured as a circular edge (circular rim surface) surface, as shown in the example, but as a conical surface located on the extension surface of the female cone surface 31 of the valve seat 30 It may be formed.

The coupling protrusion 32 and the coupling groove 35 are formed on the lower surface of the valve seat 30 and the upper surface of the valve seat support ring 33 to couple the valve seat 30 and the valve seat support ring 33 to each other. It is desirable to. The coupling protrusion 32 and the coupling groove 35 may be formed in a ring shape so that the coupling is formed over the entire lower surface of the valve seat 30 and the entire upper surface of the valve seat support ring 33. When the valve seat 30 and the valve seat support ring 33 are coupled, an adhesive is applied between the coupling protrusion 32 and the coupling groove 35 to be fitted by the coupling protrusion 32 and the coupling groove 35. The valve seat 32 and the valve seat support ring 33 are firmly coupled by the adhesive force by the adhesive.

In order to couple the valve seat support ring 33 to the inner end of the inlet 11 of the valve body 10, an inner threaded portion 11a is formed at the inner end of the inlet 11, and the valve seat is supported. On the outer circumferential surface of the ring 33, a male screw portion 33a corresponding to the female screw portion 11a is formed.

The valve body 10 and the lower end of the male screw portion (33a) formed on the outer peripheral surface of the valve seat support ring 33 and the lower end of the female screw portion (11a) formed on the inner peripheral surface of the inlet portion (11) of the valve body (10). An airtight holding member 37 is provided for maintaining the airtightness between the valve seat support rings 33. As the hermetic holding member 37, an O-ring, a packing, or the like can be used.

The elastic member 40 is installed between the opening and closing plate 21 of the actuator 20 and the support 17 of the valve body 10 as shown in Figures 1 and 5 is the opening and closing piece 21 To support the elasticity in the closing direction to block the flow of fluid, a compression coil spring is used.

In the check valve according to the present invention configured as described above, when the fluid is introduced into the inlet 11, the actuator 20 is raised, and when the fluid is not introduced into the inlet 11, the actuator 20 is provided. The actuator 20 is lowered by the elastic member 40 that has stored the elastic force during the ascending process.

Since the stem 25 of the actuator 20 is guided by the guide ring 16 formed in the valve body 10 during the lifting and lowering of the actuator 20, the actuator 20 is vertically operated. The lift will work.

If the fluid does not flow into the inlet 11, the male and female of the opening and closing plate 21 constituting the actuator 20 is elastically supported by the elastic member 40, as shown in the solid line of Figs. Conical surface 22 is in close contact with the female cone surface 31 of the valve seat 30 is maintained in a state of closing between the inlet 11 and outlet 12 and the secondary outlet (13, 14, 15). .

At this time, the opening and closing plate 21 and the valve seat 30 is in contact with the male conical surface 22 and the female cone surface 31, the valve seat 30 by the opening and closing plate 21 in the process of closing the valve. The closing action force applied to the vertical portion is distributed to the first inclined component along the oblique surface of the conical surface 31 and the second inclined component perpendicular to the first inclined component, thereby preventing damage to the valve seat 30 made of resin. It can be minimized.

In addition, when the valve seat support ring 33 is provided, the male cone surface 22 of the opening and closing plate 21 is in close contact with the female cone surface 31 of the valve seat 30 and the valve seat support ring 33 Contact pressure (34) of the contact portion applied by the elastic member 40 between the male cone surface 22 of the opening and closing plate 21 and the female cone surface 31 of the valve seat 30 is the contact portion ( 34 is distributed to the valve seat support ring 33, thereby minimizing damage to the valve seat 30 due to repeated opening and closing operations and extending the service life.

When the fluid flows through the inlet 11, as shown in the phantom lines of FIGS. 1 and 2, the actuator 20 rises while compressing the elastic member 40 by the fluid pressure, thereby actuating the actuator 20. As the male conical surface 22 of the opening and closing plate 21 constituting the deviating from the female conical surface 31 of the valve seat 30, the inlet portion 11 is opened so that the inflowed fluid flows into the outlet portion 12 and the auxiliary outlet portion. (13, 14, 15) flows to the pipe line or pressure gauge.

When the valve seat support ring 33 is provided, the male cone surface 22 of the opening and closing plate 21 constituting the actuator 20 is separated from the female cone surface 31 of the valve seat 30 and the valve The contact portion 34 of the seat support ring 33 is released.

When the inflow of the fluid through the inlet portion 11 is blocked, the actuator 20 is lowered by the elastic force of the elastic member 40, the opening and closing plate 21 constituting the actuator 20 The male conical surface 22 is in close contact with the female conical surface 31 of the valve seat 30 to close the inlet 11.

At this time, even if the actuator 20 guided by the guide ring 16 is not vertically lowered, the stem 25 is lowered in an inclined state within the tolerance range of the stem 25 and the guide ring 16. Since the actuator 20 and the valve seat 30 are in close contact with the male cone surface 22 and the female cone surface 31, the male cone surface 22 of the actuator 20 and the female cone surface 31 of the valve seat 30 are in close contact with each other. The automatic conical action of the male conical surface 22 and the female conical surface 31 is in close contact with them without any gap therebetween, so that the leakage of fluid is surely prevented, so that the function as a check valve can be faithfully performed.

The present invention may further include a union type connector 50 for connecting the inlet part 11 to a pipe line or the like, so that the inlet 11 may be directly connected to a pipe line without using a separate union joint.

The union connector 50 is formed at the upper end of the insertion portion 52 is inserted into the lower end of the valve seat support ring 33 through the inlet 11, the number formed at the lower end connected to the piping line, etc. A connecting tube 51 having a screw portion 53 and a catching piece 54 formed between the insert portion 52 and the male screw portion 53;

A connection having a locking jaw 56 formed at a lower end and caught by the locking piece 54 and a female screw part 57 formed at an upper end and screwed to a male screw part 11b formed on an outer circumferential surface of the inflow part 11. A nut 55.

The male screw portion 11b formed on the outer circumferential surface of the inlet portion 11 of the valve body 10 and the female screw portion 57 formed on the inner circumferential surface of the connecting nut 55 are composed of left screws, and the remaining valve body 10 Female threaded portions 11a formed on the inner circumferential surface of the inlet 11 and male threaded portions 33a formed on the outer circumferential surface of the valve seat support ring 33 and female threaded portions 12a and 14a formed on the outer circumferential surfaces of the outlets 12, 14, and 15. , 15a), the male screw portion 13a formed on the outer circumferential surface of the outlet portion 13, and the male screw portion 53 formed on the outer circumferential surface of the connecting pipe 51 are all composed of right-hand threads.

This is because when the connecting nut 55 is screwed in the direction of release of the left screw while the male screw portion 53 of the connecting pipe 51 is fastened to the female screw portion such as a piping line, the force of the male screw portion of the connecting pipe 51 53) acts in the loosening direction of the right hand screw, the force acts in the tightening direction of the right hand screw on the male screw portion 53 of the connector 51 when the connecting nut 55 is turned in the tightening direction of the left hand screw. It is for the connection pipe 51 not to loosen in female thread parts, such as a piping line.

On the outer circumferential surface between the male screw portion 53 and the engaging piece 54 of the connecting pipe 51 and the outer circumferential surface of the connecting nut 55, a hexagonal portion 51a for fixing with a spanner or a pipe wrench when connecting a piping line, 55a) is formed.

A stop ring 59 is inserted between the upper inner circumferential surface of the connection nut 55 and the outer circumferential surface of the inlet portion 11 of the valve body 10. In the inner peripheral surface of the upper end of the connection nut 55, it is preferable to form a groove 58 into which the stop ring 59 is inserted.

The stop ring 59 is installed to be caught by the upper end of the male screw portion 11b formed on the outer circumferential surface of the inlet portion 11 so that the connection nut 55 is not completely separated from the valve body 10.

In addition, the stop ring 59 is configured so that the connection nut 55 can be returned to the tightening direction and the release direction only within the range of 1/2 to 1 wheel, without turning the connection nut 55 several times. It is preferable that the 51 is completely tightened to the valve body 10 or the connecting pipe 51 is configured to be in a state of being relatively rotatable with respect to the valve body 10.

The stop ring 59 may be inserted into the groove 58 by forming a “C” shaped ring, but the insertion nut 58a is formed in the connection nut 55 to communicate with the groove 58. It is preferable to insert the wire through the insertion hole 58a in the state in which the connecting nut 55 is screwed to the valve body 10 so that the wire is rolled along the groove 58 to have a ring shape.

An airtight holding member 60 is inserted between the lower end of the valve seat support ring 33 and the upper surface of the locking piece 54 of the union connector 50 to maintain the airtightness. A groove 36 into which the hermetic holding member 60 is inserted is formed in the lower end of the valve seat support ring 33.

As the hermetic holding member 60, an O-ring, a packing, or the like can be used.

The union connector 50 is a connector 51 is rotatably inserted into the insertion portion 52, the inlet portion 11, the number formed on the outer peripheral surface of the inlet portion 11 of the valve body 10 The thread portion 11b and the female thread portion 57 of the connecting nut 55 are screwed together, and the stop ring 59 fitted into the recess 58 of the connecting nut 55 is the male thread portion 11b of the valve body 10. ), So that the connecting nut 55 is not completely separated from the valve body 10 by being caught at the upper end thereof, and the connecting pipe 51 has the engaging piece 54 at the locking jaw 56 of the connecting nut 55. The female threaded portion 57 of the connecting nut 55 is prepared in a state of being released 1/2 to 1 turn with respect to the male threaded portion 11b of the valve body 10.

In connecting the check valve of the present invention to the pipe line by the union connector 50, the male screw portion 53 of the connecting pipe 51 is screwed to the female screw portion (not shown) such as the piping line. Completely connect 51 and the piping line.

At this time, the connecting pipe 51 is rotatably inserted into the inlet portion 11 of the valve body 10 of the upper end of the connecting pipe 51 to adjust the direction by turning the valve body 10 in the desired direction. Can be.

When the direction adjustment of the valve body 10 is completed, turn the connecting nut 55 in the tightening direction of the left screw of the 1/2 to 1 wheel, and the female thread 57 of the connecting nut 55 is the inlet of the valve body 10. It is tightened to the male screw portion (11b) formed on the outer circumferential surface of (11), wherein the tightening force acts in the tightening direction of the right screw to the male screw portion 53, the male screw portion of the connector (51) 53 is not loosened from the female thread part of a piping line.

In the process of tightening the connecting nut 55 to the valve body 10, the connecting pipe 51 on which the locking piece 54 is caught by the locking jaw 56 of the connecting nut 55 moves toward the valve seat support ring 33. When the upper surface of the locking piece 54 is pulled close to the valve seat support ring 33, the airtight holding member 60 sandwiched therebetween is pressed and the airtightness between them is maintained.

As described above, when the check valve is separated from the pipe line while the check valve according to the present invention is connected to the pipe line or the like, turning the connecting nut 55 in the loosening direction of the left screw causes the force to be connected to the connecting pipe ( 51) acts in the loosening direction of the right hand screw.

Therefore, according to the present invention, since the valve body 10 can be connected to the piping line by the union type connector 50 without using a separate union which causes the installation height of the check valve to be high, the installation height of the check valve is increased. It can be lowered and the interference with surrounding facilities can be excluded.

In addition, since the insertion part 52 of the connection pipe 51 is rotatably inserted into the inner circumferential surface of the inflow part 11, the entire valve body 10 is rotated even when the connection pipe 51 is completely connected to the piping line. Since the valve body 10 is rotated in a desired direction, the connection pipe 55 is connected to the inlet portion 11 of the valve body 10 by the connecting nut 55. The connection can be installed facing the direction.

Since the hermetic holding member 60 is inserted between the upper end of the insertion part 52 and the lower end of the valve seat support ring 33, the airtightness between the inlet part 11 and the connection pipe 51 is maintained.

In addition, a male thread portion 11b having a stop ring 59 inserted between the upper inner circumferential surface of the connection nut 55 and the outer circumferential surface of the inlet portion 11 is formed on the outer circumferential surface of the inlet portion 11 of the valve body 10. It is caught by the upper end of the connection nut 55 is to prevent from being completely separated from the valve body (10). In addition, the stop ring (59) is 1/2 to 1/2 of the connection nut (55) in a state where the male screw portion (11b) formed on the outer circumferential surface of the inflow portion (11) and the female thread portion (57) of the connection nut (55) are completely tightened. When one turn is turned in the direction of release, the stop ring 59 is caught by the upper end of the male screw portion 11b so that the connection nut 55 no longer returns to the release direction. In this state, the direction of the check valve is adjusted. Next, when the connecting bolt 55 is turned in the tightening direction of 1/2 to 1 turn, the female threaded portion 57 of the connecting nut 55 is completely tightened to the male threaded portion 11b of the inlet 11 to be connected to the valve body 10. The pipe 51 is in a state of being fully tightened.

Therefore, in connecting the check valve of the present invention to a pipe line or the like, the male pipe part 53 of the connecting pipe 51 is screwed into a female screw part such as a piping line, and then the connecting pipe 55 is tightened by tightening the connecting nut 55. ) Is tightened to the valve body 10, the connection nut 55 is only 1/2 to 1 turn, so the operation is very simple. In addition, even when the connecting nut 55 is loosened in the disengaging direction so that the connecting pipe 51 can be relaxed in a rotatable state with respect to the valve seat support ring 33, the connecting nut 55 only needs to be turned 1/2 to 1 turn. The task is simplified.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

10: valve body 11: inlet
12, 13, 14, 15: outlet 20: actuator
21: opening and closing plate 22: conical surface
25 stem 30 valve seat
31: Conical surface 33: Valve seat support ring
34: contact portion 40: elastic member
50: union connector 51: connector
52: insertion portion 53: male thread portion
54: engaging piece 55: connecting nut
56: engaging jaw 57: female thread
59: stop ring 37, 60: airtight member

Claims (9)

A valve body (10) having an inlet (11) and at least one outlet;
An actuator 20 having an opening and closing plate 21 for opening and closing the inlet 11 and a male conical surface 22 formed along an outer circumference of the opening and closing plate 21;
The conical surface 31 is provided between the inner end of the inlet portion 11 of the valve body 10 and the upper portion of the valve seat support ring 33 and is in contact with the male conical surface 22 of the opening and closing plate 21. And a ring-shaped valve seat 30 coupled to the upper surface of the valve seat support ring 33;
A valve seat support ring 33 having an outer circumferential surface coupled to an inner end of the inlet part 11 of the valve body 10 and having a contact portion 34 in contact with the male conical surface 22 of the opening and closing plate 21; And
An elastic member 40 installed between the opening and closing plate 21 of the actuator 20 and the support 17 of the valve body 10 to elastically support the opening and closing plate 21 in a closed direction to block the inflow of fluid. Check valve, characterized in that comprises a. The method of claim 1,
Check valve, characterized in that the lower surface of the opening and closing plate 21 is provided with a concave surface (24). The method of claim 1,
Check valve, characterized in that the upper surface of the opening and closing plate 21 is provided with an elastic member support groove 23 for supporting the lower end of the elastic member (40). The method of claim 1,
Check valve, characterized in that the lower end of the valve seat support ring 33 is provided with a recess 36 is inserted into the airtight holding member (60). The method of claim 1,
The contact portion 34 is a check valve, characterized in that formed in a circular rim surface. The method of claim 1,
The contact portion (34) is a check valve, characterized in that formed in the conical surface is located on the extension surface of the female cone surface (31) of the valve seat (30). The method of claim 1,
A coupling protrusion 32 is formed on a lower surface of the valve seat 30, and a coupling groove 35 corresponding to the coupling protrusion 32 is formed on an upper surface of the valve seat support ring 33. Check valve. The method of claim 1,
An insertion part 52 formed at an upper end and inserted into a lower end of the valve seat support ring 33 through the inlet part 11, and a male screw part 53 formed at a lower end and connected to a pipe line and the insertion part. A connecting tube 51 having a catching piece 54 formed between the 52 and the external threaded portion 53; A female screw part of the left screw which is formed at the lower end and is caught by the locking jaw 56 and the male screw part 11b formed at the top and screwed to the male thread part 11b formed on the outer circumferential surface of the inflow part 11 as the left screw ( Check valve characterized in that it further comprises a union type connector (50) comprising a; connection nut (55) having a. 9. The method of claim 8,
Between the upper inner circumferential surface of the connection nut 55 and the outer circumferential surface of the inlet portion 11 of the valve body 10, a stop ring 59 is inserted and connected to the upper end of the male screw portion 11b of the inlet portion 11. Check nut, characterized in that configured to be completely tightened by turning the nut (55) 1/2 to 1 turn in the release direction no longer loosen, turning the connection nut (55) 1/2 to 1 turn in the tightening direction.

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