TWI635230B - Check valve for drain - Google Patents

Abstract

A check valve for a drainage device, comprising: a body having an upper casing and a lower cover, the lower cover being combined with the upper casing and forming a chamber therein; an eccentric structure disposed in the cavity Indoor, the eccentric structure itself or an inner wall of the chamber forms an eccentric space, the eccentric space is connected to the chamber; and a check ball is movably accommodated in the eccentric space, and the check ball is The diameter system is larger than the diameter of the first water inlet, so that the backstop ball is tightly closed to the edge of the first water inlet.

Description

Check valve for drain

The present invention relates to a drainage device, and more particularly to a check valve for a drainage device.

In the air conditioner or the radiator, in order to prevent the discharged condensate from flowing back into the body, a check valve is often provided in the discharge line.

Please refer to the patent No. WO2014035938, which is a diaphragm metering pump. As can be seen from Fig. 2, the suction side (23) is connected to the fluid source (28), and the suction side (23) contains the inlet fitting ( 36), the inlet fitting (36) is connected and the inlet fitting has a check valve (38), and the check valve (38) has a valve seat (43) and a check ball (40).

Therefore, when the fluid is introduced into the valve seat, the back gauge ball moves upward and is fixed by a fixed claw structure, so that the check ball does not shake excessively in the valve seat, and the fluid is used by the fluid. The clearance between the ball and the opening below the valve seat passes through and enters the check valve, and then flows out of the check valve through the gap of the fixed claw; when the fluid stops entering, the ball stops moving downward to the lower side of the valve seat. The opening prevents the fluid flowing out of the check valve from flowing back into the lower opening, thereby achieving the effect of the backstop.

However, the above-mentioned fixed claw structure can be seen from the drawing, in order to avoid noise when the ball is excessively shaken in use, the part of each fixed claw is contacted with the check ball to achieve the ball. The fixing effect is also because, in order to prevent the ball from loosening, the movement space for the backstop is quite limited. In view of this, the applicant believes that after a long period of use, and the moving space is quite narrow, the dirt between the ball and the fixed claws and between the ball and the valve seat is relatively easy to accumulate. Instead, it will reduce the effect of the backstop. Therefore, the Applicant believes that the above-mentioned check valve structure, the problem of dirt accumulation needs to be improved.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a check valve for a drain device which can reduce noise generation.

Further, another main object of the present invention is to provide a check valve for a drain device, which can effectively reduce the accumulation of dirt.

In order to achieve the above object, the present invention provides a check valve for a drain device, comprising: a body having an upper casing and a lower cover, the upper casing having a first water outlet, the lower cover having a a first water inlet, the lower cover is combined with the upper casing and defines a chamber therein, and the chamber is respectively connected to the first water outlet and the first water outlet; an eccentric structure is disposed in the cavity The eccentric structure itself or an inner wall of the chamber forms an eccentric space, the eccentric space is connected to the chamber; and a check ball is movably accommodated in the eccentric space, and the check ball is The diameter is larger than the diameter of the first water inlet, so that the check ball can be adhered to the edge of the first water inlet.

Thereby, the invention can effectively reduce the noise generation by the eccentric space of the eccentric structure and the structural features of the check ball.

Moreover, the present invention can be freely movably accommodated in the eccentric space by the check ball, and can effectively reduce dirt accumulation between the check ball and the plurality of limit claws, and the check ball and the annular seat piece. The situation between them happens.

In order to explain in detail the technical features of the present invention, the following first preferred embodiment will be described with reference to the following drawings, wherein:

As shown in FIG. 1 to FIG. 5, a check valve 10 for a drain device according to a first preferred embodiment of the present invention is mainly composed of a body 11, an eccentric structure 21 and a check ball 31. among them:

The main body 11 has an upper casing 13 and a lower cover 15. The upper casing 13 has a first water outlet 131. The lower cover 15 has a first water inlet 151, and the lower cover 15 and the upper casing 13 A chamber 17 is formed in the interior, and the chamber 17 is in communication with the first water inlet 151 and the first water outlet 131, respectively.

The eccentric structure 21 is disposed in the chamber 17, and the eccentric structure 21 itself forms an eccentric space 27 that communicates with the chamber 17.

The check ball 31 is movably accommodated in the eccentric space 27, and the diameter of the check ball 31 is larger than the diameter of the first water inlet 151, and the check ball 31 can be closely adhered to the first water inlet. 151's mouth.

In the first preferred embodiment, the eccentric structure 21 is composed of a plurality of limiting claws 23 and an annular seat piece 25, wherein the limiting claws 23 are arranged in an annular shape, and the limiting claws 23 are one end. The end portion 231 is gradually formed, and the other end is expanded and extended to be connected to the annular seat piece 25, and at least one of the plurality of limiting claws 23 is directed toward the plurality of limiting claws 23 and the annular seat piece 25. A predetermined thickness is added to the enclosed range to form the eccentric space 27, and a second water outlet 233 is formed between each of the two adjacent claws 23, and the eccentric space 27 is formed by each The second water outlet 233 communicates with the chamber 17. Moreover, the inside of the annular seat piece 25 is a second water inlet 251. The second water inlet 251 communicates with the eccentric space 27 and the first water inlet 151, respectively, and the annular seat piece 25 faces the second water inlet 251. At least one limiting portion 253 is disposed therein. In the first preferred embodiment, the substantial number of the at least one of the limiting claws 23 is taken as an example, and the effect is mainly to achieve an eccentric effect in the moving path in the eccentric space 27. It is the protection of the present invention to vary the number of the radially extending claws 23 and to cause a change in the eccentric effect of the movement path.

In the first preferred embodiment, the number of the at least one limiting portion 253 is three, and each of the limiting portions 253 is inwardly protruded from the annular seat piece 25, and the plurality of limiting portions 253 The diameter of the first water inlet 151 is smaller than the diameter of the plurality of limiting portions 253, and the main purpose thereof is to limit the check ball 31 by the plurality of limiting portions 253. The eccentric space 27 does not fall out; and each of the limiting portions 253 extends obliquely downward toward the axis of the annular seat piece 25 and slopes downwardly, mainly for the purpose of the check ball 31. Provide a more stable limit effect.

In addition, in the first preferred embodiment, the inner wall of the upper casing 13 has a downward facing shoulder surface 133, and the outer edge of the annular seat panel 25 extends a ring-shaped locking portion 255. The lower cover 15 Splicing to the upper casing 13 to clamp the annular engaging portion 255 between the shoulder surface 133 and the lower cover 15; thereby ensuring that the present invention is only by the first water inlet 151, Outside the space in which the second water inlet 251, the eccentric space 27, the plurality of second water outlets 233, the chamber 17 and the first water outlet 131 communicate, there is no longer any other space to communicate with each other.

The structure of the first preferred embodiment of the present invention has been described above. Next, the state of use of the first preferred embodiment of the present invention will be described below.

Referring to FIG. 6 and in conjunction with FIG. 5, when the present invention is not in use, the check ball 31 abuts against each of the protrusions 253 and exposes a portion of the check ball 31 to the first entrance. The nozzle 151 prevents the first water inlet 151 from communicating with the second water inlet 251.

When the present invention is in use, a fluid W enters from the first water inlet 151. When the hydraulic pressure is sufficient to push the check ball 31, the check ball 31 starts to move upward. At this time, the first water inlet 151 and the second water inlet 251 are changed into communication by disconnection, and after the fluid W enters the second water inlet 251, the second water inlet 251 flows through the second water inlet 251, the eccentric space 27, and the plurality of second water outlets 233. The chamber 17 and the first water outlet 131 discharge the fluid W. When the fluid W stops flowing into the first water inlet 151, the check ball 31 starts to move downward to return to the state of the first water inlet 151 due to insufficient hydraulic pressure.

Because the limiting claw 23 of the present invention is increased in the predetermined thickness, the ball 31 is affected by the limiting claw 23 during the upward movement of the check ball 31, so that the check ball 31 is The distance that can be moved left and right in the eccentric space 27 is limited, and the predetermined thickness of the fluid W that is also radially extended by the limiting claw 23 through the eccentric space 27 reduces the impact force of the fluid W. The structure can make the sway of the check ball 31 in the eccentric space 27 softer, thereby reducing the generation of noise.

Accordingly, the present invention can reduce the generation of noise by one of the limiting claws 23 of the limiting claw 23 to increase the structural feature of the predetermined thickness radially in the receiving portion.

In addition, the present invention can be freely movably accommodated in the eccentric space 27 by the check ball 31, and can effectively reduce the accumulation of dirt between the check ball 31 and the plurality of limit claws 23, and the check ball 31. A condition occurs with the annular seat piece 25.

It is worth mentioning that the end portion 231 is formed with a bump 235 from the bottom thereof, and the bump 235 is spherical. Since the check ball 31 abuts against the bump 235, the spherical surface of the check ball 31 does not completely abut the end portion 231, so the fluid W does not match the check ball 31 and the ball The end portion 231 generates an excessive suction force, so that the check ball 31 does not occur due to the adsorption force between the two, and the first water inlet 151 should be reset and attached without being reset.

Next, please refer to FIG. 7 to FIG. 10 again. The second preferred embodiment of the present invention provides a check valve 10' for a drain device, which is mainly similar to the first first preferred embodiment, except that :

The eccentric structure 21' is a cylinder, and the eccentric structure 21' is radially added to the chamber 17' by a predetermined thickness, and the eccentric structure 21' is disposed at a lower edge of the first water outlet 131'. The eccentric space 27' is formed around the inner wall of the chamber 17'.

In the second preferred embodiment, there is a first pillar column 42' and a second pillar 43'. The first pillar 42' and the second pillar 43' are disposed on the first water outlet 131'. The lower edge of the rim is arranged in a ring shape with the eccentric structure 21 ′, and the axial length of the eccentric structure 21 ′ is larger than the first struts 42 ′ and the second struts 43 ′, and the first struts 42 The axial length of ' is greater than the axial length of the second leg 43'. Thereby, when the check ball 31' moves upward, the first leg 42' is first touched and then offset against the second leg 43' for positioning of the check ball 31'. And reducing the backstop ball 31' excessively shaking in the eccentric space 27' to generate noise.

In the second preferred embodiment, please refer to FIGS. 11 and 12, when the check ball 31' is pushed by the fluid W', since the eccentric structure 21' faces the chamber 17' radially. Adding a predetermined thickness to the inside, therefore, the check ball 31' is eccentrically moved along the eccentric space 27', and then, since the axial length of the first leg 42' is larger than the axis of the second leg 43' To the length, therefore, the check ball 31' is first touched by the first post 42', and then offset by a predetermined path to the second post 43', thereby reinforcing the fixing of the check ball 31'. And effectively reducing the noise generated by the check ball 31'. The structure and the effect achieved by the second preferred embodiment are the same as those of the first preferred embodiment, and will not be described again.

10 Check valve for draining device 11 Main body 13 Upper casing 131 First water outlet 133 Shoulder surface 15 Lower cover 151 First water inlet 17 Chamber 21 Eccentric structure 23 Restricting claw 231 End 233 Second water outlet 235 Convex Block 25 annular seat piece 251 second water inlet 253 limit portion 255 annular card abutment portion 27 eccentric space 31 check ball W fluid 10' check valve for drain device 131' first water outlet 17' chamber 21' eccentric Structure 27' eccentric space 31' check ball 42' first leg 43' second leg W' fluid

Figure 1 is a perspective view of a first preferred embodiment of the present invention. Figure 2 is an exploded view of a first preferred embodiment of the present invention. Figure 3 is a partially exploded view of the first preferred embodiment of the present invention; showing the bottom state of the eccentric structure. Figure 4 is a top plan view of a first preferred embodiment of the present invention. Fig. 5 is a cross-sectional view taken along line 5-5 of Fig. 4. Figure 6 is a schematic view showing the state of use of the first preferred embodiment of the present invention. Figure 7 is a side view of a second preferred embodiment of the present invention. Figure 8 is a cross-sectional view taken along line 8-8 of Figure 7. Figure 9 is a cross-sectional view taken along line 9-9 of Figure 8; showing that the axial length of the first leg is greater than the axial length of the second leg. Figure 10 is a cross-sectional view taken along line 10-10 of Figure 8; showing the state of the eccentric structure and the first leg. Figure 11 is a schematic view showing the state of use of the second preferred embodiment of the present invention; showing that the check ball moves in the eccentric space. Fig. 12 is a view showing the state of use of another viewing angle of the second preferred embodiment of the present invention; showing a state in which the check ball is abutted against the second leg by the first leg.

Claims (11)

A check valve for a drain device, comprising: a body having an upper casing and a lower cover, the upper casing having a first water outlet, the lower cover having a first water inlet, the lower cover and the lower cover The upper casing is combined and internally forms a chamber, and the chamber is respectively connected to the first water inlet and the first water outlet; an eccentric structure is disposed in the chamber, and the eccentric structure itself or cooperates with the cavity An inner wall of the chamber forms an eccentric space, the eccentric space is connected to the chamber; and a check ball is movably accommodated in the eccentric space, and the diameter of the check ball is larger than the diameter of the first water inlet The backstop ball can be adhered to the edge of the first water inlet. A check valve for a drain device according to the first aspect of the patent application, wherein: the eccentric structure is composed of a plurality of limit claws and an annular seat piece, wherein the limit claws are annularly arranged, and the limit positions are One end of the claw system is gradually formed to form one end portion, and the other end is expanded and extended to be connected to the annular seat piece, and at least one of the plurality of limiting claws is bound to the annular seat piece toward the annular seat piece. a predetermined thickness is added in the range to form the eccentric space, and a second water outlet is formed between the two adjacent claws, and the eccentric space is connected by each of the second water outlets. a chamber; the inside of the annular seat is a second water inlet, and the second water inlet communicates with the eccentric space and the first water inlet respectively. The check valve for the drain device according to the second aspect of the patent application, wherein the annular seat piece is provided with at least one limiting portion in the second water inlet. According to the backstop valve for the drainage device of claim 3, wherein the at least one limiting portion is plural, each of the limiting portions is a protrusion protruding inward from the annular seat piece, and the The plurality of limiting portions are arranged in a ring shape. The check valve for the drain device according to the fourth aspect of the patent application, wherein: the diameter of the first water inlet is smaller than the diameter of the plurality of limit portions. The check valve for a drain device according to claim 5, wherein each of the limiting portions is inclined toward the axis of the annular seat piece and extends obliquely downward. A check valve for a drain device according to claim 6 wherein the end portion forms a projection from a bottom portion thereof. A check valve for a drain device according to claim 7 of the patent application, wherein: the bump is spherical. A check valve for a drain device according to claim 2, wherein: the inner wall of the upper casing has a downward facing shoulder surface, and the outer edge of the annular seat plate extends a ring-shaped abutting portion, the lower portion The cover is screwed to the housing such that the annular snap portion is clamped between the shoulder surface and the lower cover. A check valve for a drain device according to claim 1, wherein: the eccentric structure is a cylinder, and the eccentric structure is radially added to the chamber by a predetermined thickness, and the eccentric structure is disposed at the first The periphery of the lower edge of the water outlet is formed to cooperate with the inner wall of the chamber to form the eccentric space. A check valve for a drainage device according to claim 10, wherein: a first pillar and a second pillar are further disposed, and the first pillar and the second pillar are disposed at a lower edge of the first water outlet And surrounding the eccentric structure in an annular shape, and the axial length of the eccentric structure is greater than the first pillar and the second pillar, and the axial length of the first pillar is greater than the axis of the second pillar To the length.