KR101303223B1 - Check valve for spray device - Google Patents

Abstract

The present invention relates to a check valve for a fluid injector, and the present invention relates to a check valve of a check valve. It can be removed to prevent the back flow of the fluid as much as possible.

Description

CHECK VALVE FOR SPRAY DEVICE

The present invention relates to a check valve for a fluid injector, and more particularly, to the check block of the check valve by integrally forming a protruding tip or by detachably attaching a remover that can bend elastically. The present invention relates to a check valve for a fluid injector capable of removing foreign matters such as granules included in an elastic coat to prevent backflow of the fluid as much as possible.

In general, the air spray is in the form of a gun (gun) and is connected to the air hose to perform the painting and sand blasting operations while spraying materials such as paint and sand with high pressure air.

Among them, air spray guns for elastic coats are mainly used in construction interior painting work.

Here, the elastic coat is a high-grade interior paint designed with a special water-soluble resin and a high-quality pigment, which is crack-covered, easy to repair, and is an environmentally friendly water-based special paint made of natural marble.

In particular, the elastic coat is used for the wall is used to prevent corrosion, durability, moisture of cement. At this time, the elastic coat supply hose for supplying the elastic coat to the air spray gun is provided with a ball check valve so that the supplied elastic coat does not flow back.

As shown in FIG. 1, an apparatus for supplying an elastic coat to an air spray gun (not shown) transfers a cylinder 1, which is advanced back and forth by pneumatic or hydraulic pressure, and an elastic coat supplied and extended to the cylinder 1, to an air spray gun. And a check valve (3) connected to the supply pipe (2) for guiding the elastic coat when the cylinder (1) is retracted to the supply pipe (2) and preventing backflow of the elastic coat when the cylinder (1) is advanced. ).

In particular, the check valve 3 opens and closes the body 4 forming the outer shape, the check block 5 and the check hole 6 which are provided inside the body 4 and through which the check holes 6 communicate with each other. A check ball 7, an elastic member 8 for supporting the check ball 7 elastically in contact with the check block 5, and a position fixing of the elastic member 8 inside the body 4. It consists of a mounting rib (9).

Thus, when the cylinder 1 is reversed, the elastic coat is forced to flow into the supply pipe 2 through the check hole 6, which forces the check ball 7 to the check block 5 And the elastic coat is transferred to the supply pipe (2).

In addition, when the elastic coat loses the force forcibly supplied into the body 4 of the check valve 3, the check ball 7 is lowered by the elastic restoring force of the elastic member 8 and the check hole 6 is closed. The cylinder 1 is advanced. For this reason, the elastic coat supplied to the supply pipe 2 is sprayed through the air spray gun.

The check valve of the existing device that supplies the elastic coat to the air spray gun, because the paint particles contained in the elastic coat is buried in the ball-type check ball by the back flow of the elastic coat due to the gap between the check block and the check ball There is a problem that does not work. Therefore, there is a need to improve this.

The present invention has been made in order to improve the problems described above, by forming a protruding tip integrally protruding the check block of the check valve to prevent the backflow through the block of the check ball through the check hole of the check block It is possible to remove foreign substances such as granules contained in the elastic coat on the surface, and this allows the check ball to be in close contact with the check block corresponding to the edge of the check hole, thereby preventing the backflow of the fluid to the maximum. It is an object of the present invention to provide a check valve.

In addition, the present invention is provided on the surface of the check ball by detachably attaching a remover made of an elastic material such as rubber to the check block of the check valve through the check hole of the check block to prevent backflow through blockage of the check ball. It is possible to remove foreign substances such as granules contained in the elastic coat so that the check ball can be brought into close contact with the check block corresponding to the edge of the check hole, so that the back flow of the fluid can be prevented as much as possible. The purpose is to provide a valve.

In addition, an object of the present invention is to provide a check valve for a fluid injector to improve the sealing force for preventing backflow of fluid by changing the shape of the check ball and the shape of the remover to increase the contact area.

A check valve for a fluid injector according to an embodiment of the present invention includes: a fluid spaced apart from a check ball blocking the check hole by a force of a fluid flowing through a check hole of a check block provided in the body; In the check valve for injector, it characterized in that the protruding tip protruding to the check block along the check hole to remove the foreign matter on the surface of the check ball in contact when the pushing force of the fluid is removed.

In addition, the check valve for a fluid injector according to another embodiment of the present invention: spaced apart the check ball blocking the check hole by the force of the fluid forced through the check hole of the check block provided in the body A check valve for a fluid injector, comprising: a remover that flexes elastically in a check block along the check hole to remove foreign matter from the surface of the check ball that is contacted when the pushing force of the fluid is removed. .

The check block is preferably to form a fitting groove on the upper side for installing the remover.

Preferably, the check block forms an inclined surface along the edge of the check hole, and the fitting groove is formed in the inclined surface to insert the remover inclined with respect to the vertical line.

The remover may be gradually tapered to closely contact the check ball.

The remover may extend to form a support member that is gradually thicker to firmly support the check ball that is removed from the foreign matter returning to the check block side.

The check ball may form an inclined contact surface portion on the circumferential surface to increase the contact area with the remover.

The check ball is preferably arranged in a plurality of mounting grooves in the circumferential direction, the remover is preferably provided with a mounting protrusion that is fitted one to one in the mounting groove when the check ball completely blocks the check hole.

As described above, the check valve for the fluid injection device according to the present invention, unlike the prior art through the check hole of the check block through the check block of the check valve of the check valve to prevent backflow through the blockage of the check ball integrally By forming the protrusion, it is possible to remove foreign substances such as granules contained in the elastic coat on the surface of the check ball. As a result, the check ball can be brought into close contact with the check block corresponding to the edge of the check hole. Can be.

In addition, the present invention is provided on the surface of the check ball by detachably attaching a remover made of an elastic material such as rubber to the check block of the check valve through the check hole of the check block to prevent backflow through blockage of the check ball. It is possible to remove foreign matters such as granules contained in the elastic coat, thereby allowing the check ball to be in close contact with the check block corresponding to the edge of the check hole, thereby preventing the back flow of the fluid as much as possible.

In addition, the present invention can improve the sealing force for preventing the back flow of the fluid by changing the shape of the check ball and the shape of the remover to increase the contact area.

1 is a cross-sectional view of a fluid injector having a conventional check valve.
2 is a sectional view showing main parts of a check valve for a fluid injector according to a first embodiment of the present invention.
3 is a perspective view of a check block of a check valve for a fluid injector according to a first embodiment of the present invention.
4 is a sectional view of principal parts of a check valve for a fluid injector according to a second embodiment of the present invention.
5 is an exploded perspective view of a check block and a remover of a check valve for a fluid injection device according to a second embodiment of the present invention.
6 is a cross-sectional view of main parts of a check valve for a fluid injector according to a third embodiment of the present invention.
7 is an exploded perspective view of a check block and a remover of a check valve for a fluid injection device according to a third embodiment of the present invention.
8 and 9 are different embodiments showing the remover shape of the check valve for a fluid injector according to the present invention.
10 is another embodiment showing the check ball shape of the check valve for a fluid injector according to the present invention.
11 is a cross-sectional view showing the coupling of the check ball and the remover of the check valve for a fluid injection device according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a check valve for a fluid injector according to the present invention. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

2 is a cross-sectional view of essential parts of a check valve for a fluid injector according to a first embodiment of the present invention, and FIG. 3 is a perspective view of a check block of a check valve for a fluid injector according to a first embodiment of the present invention.

4 is a cross-sectional view illustrating main parts of a check valve for a fluid injector according to a second embodiment of the present invention, and FIG. 5 is an exploded perspective view of a check block and a remover of a check valve for a fluid injector according to a second embodiment of the present invention. .

6 is a cross-sectional view of main parts of a check valve for a fluid injector according to a third embodiment of the present invention, and FIG. 7 is an exploded perspective view of a check block and a remover of the check valve for a fluid injector according to a third embodiment of the present invention. .

8 and 9 are different embodiments showing the remover shape of the check valve for a fluid injector according to the present invention.

10 is another embodiment showing a check ball shape of the check valve for a fluid injector according to the present invention, Figure 11 is a cross-sectional view showing the coupling of the check ball and the remover of the check valve for a fluid injector according to the present invention.

2 and 3, the check valve 100 for the fluid injector according to the first embodiment of the present invention protrudes the protruding tip 200 to the check block 120 provided inside the body 110. Characterized by forming.

In particular, the check valve 100 is provided to allow only one-way flow of the fluid having a grain, such as an elastic coat, to prevent the flow in the other direction.

For example, the check valve 100 includes a body 110, a check block 120 having a check hole 122, a check ball 130a, an elastic member 140, and a mounting rib 150. Of course, the detailed configuration of the check valve 100 is not limited.

At this time, the body 110 is to form an outer shape of the check valve 100 can be changed to a variety of shapes and materials, and is connected to a supply pipe (not shown) for guiding the flow of the fluid, such as an elastic coat. Here, the body 110 is formed to be open to both sides because the fluid is supplied to guide the supply pipe side.

In addition, the check block 120 is located inside the body 110 and bisects the inside of the body 110. In particular, the check block 120 passes through the check holes 122 that communicate with both sides along the axial direction of the body 110 to allow one-way flow of the fluid.

In addition, the check ball 130a serves to block the check hole 122 by its own weight or an external force on one side of the check block 120 or open it by a pushing force caused by the one-way flow of the fluid to allow the flow of the fluid. . That is, the check ball 130a serves to allow flow of external fluid only to the supply pipe.

In addition, the elastic member 140 serves to block the check hole 122 of the check block 120 by pushing the check ball (130a) with an external force, preferably as a coil spring. That is, when the force pushing the fluid in one direction of the check hole 122 does not act, the elastic member 140 elastically pushes the check ball 130a in the other direction of the check hole 122 check hole 122 It serves to prevent. Thus, the fluid does not flow back.

In addition, the mounting rib 150 serves to fix the position by mounting the elastic member 140 inside the body (110). The mounting ribs 150 may be deformed into various shapes and various materials. Of course, the elastic member 140 may be directly connected to the body 110 and fixed in position. Of course, the mounting rib 150 may be formed integrally with the body 110, it may be formed detachably.

As such, the check valve 100 for the fluid injector opens the check hole 122 by a force of fluid flowing through the check hole 122 of the check block 120 provided inside the body 110. It serves to allow the flow of fluid by spaced apart the check ball (130a) blocking.

In particular, when the fluid includes a foreign material 10 such as granules, such as paint, such as an elastic coat, the check ball 130a is buried in the foreign material 10 on the surface, thereby, the check ball 130a is a check hole Along the edge of the 122 is spaced apart from the check block 120. Thus, the fluid can flow back.

Accordingly, the check block 120 protrudes the protruding tip 200 along the check hole 122 to remove the foreign matter 10 deposited on the surface of the check ball 130a which is contacted when the pushing force of the fluid is removed. desirable.

That is, the check block 120 protrudes the protruding tip 200 continuously along the edge of the check hole 122 in the direction in which the fluid flows backward. At this time, the protruding tip 200 is preferably formed or molded during the mold manufacturing or injection molding of the check block 120.

Of course, the protrusion tip 200 is preferably formed in a variety of shapes.

In more detail, the check ball 130a compresses the elastic member 140 by the pushing force due to the one-way flow of the fluid and is spaced apart from the check block 120 to remove the one-way pushing force of the fluid. The elastic restoring force moves in the direction of the check block 120 and blocks the check hole 122. The protruding tip 200 has a foreign material 10 on the circumferential surface of the check ball 130a moving in the direction of the check block 120. ) To scrape and remove.

Accordingly, the protruding tip 200 is preferably to form a relatively sharp end. Accordingly, the protruding tip 200 is preferably formed to be inclined upward toward the check hole 122 at the edge of the check block 120. Of course, the protruding tip 200 may have a rounded end portion so as not to scratch the surface of the check ball 130a, and may be variously modified as a whole.

Meanwhile, referring to FIGS. 4 and 5, the check valve 100 for a fluid injector according to the second embodiment of the present invention includes a remover 300 that is elastically bent to the check block 120. It features.

Here, the check valve 100 is to allow the flow of the fluid in one direction and prevent the flow in the other direction, it can be made in a variety of configurations, as described above, the body 110, the check block having a check hole (122) 120, the check ball 130a, the elastic member 140 and the mounting ribs 150 will be made. Accordingly, the functions of the body 110, the check block 120 having the check hole 122, the check ball 130a, the elastic member 140 and the mounting rib 150 are replaced with those described above.

In particular, as described above, when the fluid includes a foreign material 10 such as granules such as a paint such as an elastic coat, the check ball 130a causes the foreign material 10 to be buried on the surface. 130a is spaced apart from the check block 120 along the edge of the check hole 122. Thus, the fluid can flow back.

Accordingly, the check block 120 includes a remover 300 that flexes elastically along the check hole 122 to remove the foreign matter 10 deposited on the surface of the check ball 130a that is contacted when the pushing force of the fluid is removed. It is preferable to.

That is, the check block 120 includes the remover 300 continuously along the edge of the check hole 122 in the direction in which the fluid flows backward. At this time, the remover 300 is preferably detachably installed in the check block 120 to enable maintenance.

Of course, the remover 300 is preferably formed in various shapes.

In addition, the remover 300 is applicable to a variety of materials that can be elastically bent, having a strength enough to remove the foreign material 10 is to be made of rubber that can be as close as possible to the surface of the check ball (130a) desirable.

In more detail, the check ball 130a compresses the elastic member 140 by the pushing force due to the one-way flow of the fluid and is spaced apart from the check block 120 to remove the one-way pushing force of the fluid. It moves in the direction of the check block 120 by the elastic restoring force to block the check hole 122, the remover 300 is the foreign matter 10 buried in the circumferential surface of the check ball 130a is moved in the direction of the check block 120 Wipe and remove the role.

At this time, the remover 300 is preferably installed in the check block 120 to be continuous along the edge of the check hole 122, it is preferably formed in a hollow circular column shape. The diameter D1 of the remover 300 is preferably smaller than the diameter D2 of the check ball 130a (D1 <D2). This removes the foreign matter 10 from the circumferential surface of the check ball 130a moving in the direction of the check block 120 and closes the circumferential surface of the check ball 130a blocking the check hole 122. This is to improve the reverse flow prevention. Of course, the remover 300 is elastically well formed to a thickness enough to remove the foreign matter 10 on the surface of the check ball (130a) well.

In addition, the check block 120 forms a fitting groove 310 on the upper side to install the remover 300 so that the remover 300 is easily detachably installed on the check block 120.

That is, the fitting groove 310 is formed in one side of the check block 120 to be continuous along the check hole (122). Accordingly, the remover 300 can be easily mounted on the check block 120. At this time, the fitting groove 310 is formed to a depth enough to insert the remover 300 so that the remover 300 for wiping the surface of the check ball 130a is not separated from the check block 120.

In this case, when the check ball 130a comes into contact with the check block 120 along the edge of the check hole 122, the remover 300 is opened as the distance from the check block 120 increases.

6 and 7, the check valve 100 for the fluid injection device according to the third embodiment of the present invention is provided to be gathered around the remover 300 of the check block 120. It features.

At this time, the check valve 100 is to allow the flow of the fluid in one direction and prevent the flow in the other direction, it can be made in a variety of configurations, as described above, the body 110, the check block having a check hole (122) 120, the check ball 130a, the elastic member 140 and the mounting ribs 150 will be made. Accordingly, the functions of the body 110, the check block 120 having the check hole 122, the check ball 130a, the elastic member 140 and the mounting rib 150 are replaced with those described above.

In an embodiment, the check block 120 forms an inclined surface 124 along the edge of the check hole 122.

The inclined surface 124 is gradually enlarged and formed toward the check ball 130a with respect to the center line of the check hole 122. In other words, the inclined surface 124 is formed to be inclined at an angle α in the direction of the edge of the check block 120 with respect to the vertical line parallel to the inner surface of the check hole 122.

At this time, the diameter D2 of the circle drawn along the circumferential direction above the inclined surface 124 is the same as the diameter D2 of the check ball 130a. Of course, the diameter of the circle drawn in the circumferential direction of the upper side of the inclined surface 124 may be formed smaller than the diameter (D2) of the check ball (130a).

In addition, the fitting groove 310 for fitting the remover 300 is formed on the inclined surface 124.

Accordingly, the fitting groove 310 is inserted inclined toward the center of the check hole 122. This, by installing the remover 300 inclined toward the center of the check hole 122 to remove the foreign material 10 on the surface of the check ball 130a by wiping the foreign material 10 from the lower surface of the check ball 130a. This is to improve the accuracy and to increase the adhesion with the check ball 130a blocking the check hole 122.

At this time, the fitting groove 310 is not limited to the angle formed with respect to the inclined surface 124 is formed in the check block 120 perpendicular to the inclined surface 124.

In addition, the remover 300 may increase the wiping degree of the foreign matter 10 on the surface of the check ball 130a when a plurality of removers 300 are provided.

Thus, a plurality of removers 300 are provided, and accordingly, a plurality of fitting grooves 310 are formed as many as the number of removers 300. In particular, when the remover 300 is made of the same diameter, it is assumed that the remover 300 is made of a different diameter because it is impossible to install a plurality. The fitting groove 310 is recessed in the check block 120 to insert each remover 300 one-to-one.

In addition, the remover 300 is shown to be formed in a hollow circular tube shape made of the same thickness from one side inserted into the fitting groove 310 of the check block 120 to the other side opposite to the other side.

In addition, the remover 300 may vary in thickness so as to give more flexibility to improve adhesion to the surface of the check ball 130a.

That is, as shown in Figure 8, the remover 300 is preferably formed to be gradually tapered from one side to the other side.

In other words, the remover 300 forms one thickness t1 thicker than the other thickness t2 (t1> t2). Thus, one side of the relatively thick remover 300 is inserted into the fitting groove 310 to firmly support the entire remover 300, and the other side of the relatively thin remover 300 checks the state of blocking the check hole 122. The area of maximum contact with the ball 130a is widened.

In addition, as shown in FIG. 9, the remover 300 returns to the check block 120 side and gradually supports the support member 320 formed to be thicker to the other side to firmly support the check ball 130a for removing the foreign material 10. It is preferable to form an extension.

In this case, the remover 300 may extend to form a support member 320 that is gradually thickened while being made of the same thickness, and as shown in FIG. 8, in a state where the thickness t1 of one side and the thickness t2 of the other side are different from each other. The support member 320 may be extended.

Here, the support member 320 is formed with a thickness equal to the thickness of the other side (t2) of the remover 300, the other side is formed thicker than one side. One side thickness of the remover 300 and the other side thickness of the support member 320 may be the same, or may be different.

For convenience, one side thickness t1 of the remover 300 and the other side thickness t1 of the support member 320 are shown to be the same.

In addition, the support member 320 is preferably formed integrally with the remover 300.

In particular, as the support member 320 is gradually thickened from one side to the other side, the support member 320 is firmly supported to maintain the contact with the check ball 130a, thereby improving the removal force of the foreign matter 10. Do it. That is, when the support member 320 extends to the remover 300, the support member 320 serves to substantially remove the foreign matter 10 of the check ball 130a.

Meanwhile, the check ball 130a may be spherical, but may be deformed into various shapes.

As shown in FIG. 10, the check ball 130b is preferably modified to increase the contact area with the remover 300.

That is, the check ball 130b forms an inclined contact surface portion 132 on the circumferential surface to increase the contact area with the remover 300.

The contact surface portion 132 is naturally formed by increasing the diameter from one side of the check ball (130b) to the other side.

This is because when the check ball 130b is joined to the check block 120 along the edge of the check hole 122, the remover 300 is wider as it moves away from the check block 120. That is, the check ball 130b forms an inclined contact surface portion 132 so as to be in contact with the remover 300 that is opened. At this time, the inclination angle of the contact surface portion 132 is not limited.

On the other hand, the remover 300 may allow backflow of fluid when the foreign matter 10 is not completely in contact with the contact surface portion 132 having a relatively large area.

At this time, the check ball 130b is preferably rounded on the lower side to improve the sealing force of the check hole 122.

The reference numerals not described are replaced with those described above.

Thus, as shown in FIG. 11, the check ball 130b arranges a plurality of mounting grooves 134 in the circumferential direction, and the remover 300 has the mounting groove 134 when the check ball 130b completely blocks the check hole 122. It is preferable to have a mounting protrusion 136 to be fitted one to one).

That is, the mounting protrusion 136 is fitted into the mounting groove 134, so that the remover 300 is completely in contact with the contact surface portion 132, thereby preventing the back flow of the fluid.

In this case, the check ball 130a may be applied in a spherical shape. The remover 300 may be partially wrapped inside the other side to partially wrap the check ball 130b. However, the remover 300 may be applied in the shape of the remover 300 or the shape shown in FIG. 8.

In addition, the mounting protrusion 136 may be modified into various shapes, and the mounting groove 134 is formed to correspond to the shape of the mounting protrusion 136.

In addition, the check ball 130b may be rounded on the lower side to improve the sealing force of the check hole 122.

In particular, the foreign material 10 is distributed between the check ball 130b and the remover 300, the upper side of the check ball 130b and the upper side of the check block 120, the mounting groove 134 and the mounting protrusion 136 Due to the increase in the contact area, even if a large distribution between the check ball 130b and the remover 300, it is possible to prevent the back flow of the fluid.

The reference numerals not described are replaced with those described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Therefore, the true technical protection scope of the present invention will be defined by the claims below.

100: check valve 110: body
120: check block 122: check hole
130a and 130b: check ball 140: elastic member
200: protruding tip 300: remover
310: fitting groove 320: support member

Claims (8)

delete In the check valve for a fluid injection device for separating the check ball blocking the check hole by the force of the fluid flowing through the check hole of the check block provided in the body,
The check block has a remover that is elastically curved along the check hole to remove foreign matter on the surface of the check ball that is in contact when removing the pushing force of the fluid, the upper groove for inserting the remover Check valve for fluid injector, characterized in that the forming.
delete The method of claim 2,
The check block forms an inclined surface along the edge of the check hole;
The fitting groove is formed on the inclined surface check valve for a fluid injection device, characterized in that for inserting the remover inclined with respect to the vertical line.
The method of claim 2,
The remover is a check valve for a fluid injector, characterized in that gradually formed to be in close contact with the check ball.
6. The method according to claim 2 or 5,
The remover is a check valve for a fluid injector, characterized in that for extending the support member gradually formed to thicken the support ball to remove the foreign matter returned to the check block side.
The method according to any one of claims 2, 4 and 5,
The check ball is a check valve for a fluid injector, characterized in that for forming a contact surface inclined to the circumferential surface to increase the contact area with the remover.
8. The method of claim 7,
The check ball is arranged a plurality of mounting grooves in the circumferential direction;
The remover has a check valve for a fluid injector, characterized in that it comprises a mounting protrusion that is fitted one to one in the mounting groove when the check ball completely blocks the check hole.

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