TWI664367B - Switching valve structure - Google Patents

Abstract

A switching valve structure includes a first valve seat provided with a first inlet and a first channel communicating with the first inlet. A second valve seat is provided with an outlet and a second passage communicating therewith. A third valve seat is provided with a second inlet and a third passage communicating with the second inlet. A fourth valve seat has a piston chamber and a fourth passage. A piston plate of a switching assembly is disposed in the piston chamber, and a valve core passes through the second channel, the third channel, and the fourth channel, and the valve core is fixedly connected to the other end of the piston plate. A stopper is formed in the second passage. When the stopper part abuts the first passage, the second inlet is in communication with the outlet; when the stopper part abuts the third passage, the first inlet is in communication with the outlet.

Description

Switching valve structure

The present invention relates to a structure of a valve, and more particularly to a structure of a fluid switching valve.

Generally, the pipelines for conveying liquid or gas will use valves to control the blocking or conduction of the connected pipelines, and then control the supply of fluid or the direction of fluid transportation.

The three-way valve system is a valve that is commonly used in fluid pipelines to control the supply of fluids. In principle, the three-way valve system has three communicating open ends on the valve body, and one of them is open. A valve hole is formed at the channel at the end, and a stopper portion that can shield the valve hole is provided at the valve hole. In addition, the valve body has a peripheral portion that projects into the valve body and is connected to the stopper portion. The driving element that drives the stopper to move, so that the stopper can be driven by the driving element to shield the valve hole or change the state that the valve hole is opened.

The blocking part of the conventional three-way valve is usually a sphere or a circular plate that shields the valve hole, and mainly rotates in place, so that the perforation on the sphere is directly facing the valve hole or the circular plate and the valve. The way of staggered holes allows the fluid to pass through the perforation of the sphere or the gap between the circular plate and the valve hole, thereby achieving the purpose of opening the valve hole.

However, when the valve body is opened or closed by the rotation of the sphere, the perforation of the sphere is rotated to a longer stroke relative to the valve hole, which will cause a temporary interruption of the window period of the fluid in the pipeline, resulting in a fluid flow rate and flow velocity. Stability issues.

The main purpose of this creation is to provide a switching valve structure, which has the effect of maintaining a stable feeding amount and can achieve the purpose of smooth feeding.

In order to achieve the above-mentioned object and effect, the switching valve structure disclosed in the present invention includes a first valve seat with a first inlet on the peripheral side, and the first valve seat has a first flow passage and a first passage inside. The two ends of the first-stage channel communicate with the first inlet and the first channel, respectively, and the first inlet allows a first fluid to enter the first valve seat.

A second valve seat is provided with an outlet on the peripheral side. The second valve seat has a second flow passage and a second passage inside. The two ends of the second flow passage communicate with the outlet and the second passage, respectively. A second valve seat is stacked on the first valve seat, and the second passage is connected to the first passage to form a communication.

A third valve seat has a second inlet on the peripheral side, the third valve seat has a third flow passage and a third passage inside, the third valve seat is stacked on the second valve seat, and the third valve seat The two ends of the flow channel are in communication with the second inlet and the third channel, respectively. The third channel is in communication with the second channel, and the second inlet allows a second fluid to enter the third valve seat.

A fourth valve seat has a piston chamber in the axial direction, one end of the piston chamber is an open end, and the other end opposite to the open end is a bottom, and the bottom has a fourth channel communicating with the piston chamber. A valve seat is stacked on the third valve seat, and the fourth channel is connected to the third channel to form a communication.

A switching assembly is composed of a piston plate and a valve core. The piston plate is disposed in the piston chamber of the fourth valve seat. The valve core passes through the second channel, the third channel, and the communication channel. A fourth channel, one end of the valve core is fixed to the piston plate, the other end of the valve core forms a stopper and is located in the second channel, and an end surface of the stopper is opposite to the first channel and the third In the passage, the movement of the valve core can make the side of the stop portion approach and away from the outlet. A cover is arranged in the axial direction of the fourth valve seat and is used to seal the piston chamber.

Wherein, when the combination of the valve core and the piston plate is subjected to a force, the stopper generates a linear displacement in the second passage; when the end surface of the stopper abuts the first passage, the second inlet and the outlet When communicating, the second fluid can be output from the outlet; when the stopper portion abuts the third channel, the first inlet is in communication with the outlet, the first fluid can be outputted from the outlet; the side of the stopper portion is opposite to The relative displacement of the outlet and the abutment of the stopper to the first channel and the third channel are used to perform output switching of the first fluid and the second fluid.

10‧‧‧The first valve seat

12‧‧‧ first entrance

14‧‧‧First runner

16‧‧‧ the first channel

20‧‧‧Second valve seat

22‧‧‧Export

24‧‧‧Second runner

26‧‧‧Second Channel

30‧‧‧Third valve seat

32‧‧‧Second Entrance

34‧‧‧ third runner

36‧‧‧ third channel

360‧‧‧First Chamber

362‧‧‧Second Chamber

40‧‧‧Fourth valve seat

42‧‧‧Piston chamber

44‧‧‧ bottom

46‧‧‧Fourth Channel

47‧‧‧First control liquid inlet

48‧‧‧Second control liquid inlet

50‧‧‧Switching components

52‧‧‧Valve

54‧‧‧Piston plate

520‧‧‧Connection Department

522‧‧‧Shaft

524‧‧‧Reduction

526‧‧‧stop

60‧‧‧Cap

62‧‧‧Locking element

70‧‧‧Valve channel

72‧‧‧oil seal element

74‧‧‧ resisting fate

76‧‧‧ Clearance

80‧‧‧ the first barrel

82‧‧‧first fluid

84‧‧‧Second Barrel

86‧‧‧Second fluid

FIG. 1 is a schematic cross-sectional view of a combined structure according to a preferred embodiment of the present invention.

Figure 2 is a schematic diagram of the combined structure of the third channel and the valve core of the present invention.

FIG. 3 is a schematic structural diagram of the input and output of the first fluid according to the present invention.

Fig. 4 is an enlarged schematic view of a partial structure of Fig. 3 of the present invention.

FIG. 5 is a schematic structural diagram of the input and output of the second fluid according to the present invention.

Fig. 6 is an enlarged schematic view of a partial structure of Fig. 5 of the present invention.

FIG. 7 is a schematic diagram of a switching action of a valve core with respect to a second flow passage according to the present invention.

Figure 1 shows a preferred embodiment of the present invention. A switching valve is used to switch the output of fluids from different input sources. 30. A fourth valve seat 40, a switching assembly 50, and a cover 60. The first valve seat 10, the second valve seat 20, the third valve seat 30, the fourth valve seat 40, and the cover 60 may be cylindrical (circular plate) -shaped and have the same outer diameter. However, the above shapes are only examples and are not limited thereto.

The first valve seat 10 defines a first inlet 12 from the outer surface toward the inside. A first flow passage 14 is defined in the first valve seat 10. The first flow passage 14 may be along a radial direction of the first valve seat 10. The first valve seat 10 has a first passage 16 inside. The first passage 16 can be located in an axial direction of the first valve seat 10. One end of the first channel 16 is an open end, and the other end is a closed end. The first flow channel 14 is located between the first inlet 12 and the first channel 16, and two ends of the first flow channel 14 are connected to the first inlet 12 and the first channel 16. In this way, the first inlet 12, the first flow channel 14 and the first channel 16 are connected.

An outlet 22 is defined in the second valve seat 20 from the outer surface inward. A second flow passage 24 and a second passage 26 are defined in the second valve seat 20. The second passage 26 is located in the axial direction of the second valve seat 20 and has a through structure. The second flow passage 24 may be located in a radial direction of the second valve seat 20. One end of the second flow channel 24 is connected to the outlet 22, and the other end is connected to the second channel 26.

A second inlet 32 is defined in the third valve seat 30 from the outer surface inward. The third valve seat 30 has a third flow passage 34 and a third passage 36 therein. The third passage 36 is formed in the axial direction of the third valve seat 30, and the third flow passage 34 is formed in the third valve seat 30. The radial direction of the third valve seat 30. One end of the third flow channel 34 is connected to the second inlet 32, and the other end is connected to the third channel 36.

An axially inner portion of the fourth valve seat 40 has a piston chamber 42. One end of the piston chamber 42 is an open end, and the other end is a bottom 44 opposite to the open end. The bottom 44 has a fourth passage 46. The fourth passage 46 is located in the axial direction of the fourth valve seat 40 and has a through structure. In addition, the fourth valve seat 40 further includes a first control liquid inlet 47 and a second control liquid inlet 48, and the first control liquid inlet 46 and the second control liquid inlet 48 communicate with the piston chamber 42.

A switching assembly 50 is composed of a piston plate 54 and a valve core 52. The valve core 52 is a rod body member, and is axially moved from one end to the other end (top to bottom in the drawing direction) in order. The connecting portion 520, a shaft portion 522, a reduction portion 524, and a stop portion 526. The connecting portion 520 is used to couple the piston plate 54. The outer diameter of the reduced portion 524 is smaller than the outer diameter of the shaft portion 522. The stopping portion 526 has a thickness and an outer diameter larger than the shaft portion 526.

The assembled state of this embodiment is that the second valve seat 20 is disposed in the axial direction of the first valve seat 10, so that the second passage 26 is connected to the first passage 16. The third valve seat 30 is disposed in the axial direction of the second valve seat 20, so that the third passage 36 is connected to the second passage 26. The fourth valve seat 40 is disposed on the third valve seat 30 such that the fourth passage 46 is connected to the third passage 36.

According to the above-mentioned stacked forms of the first valve seat 10, the second valve seat 20, the third valve seat 30, and the fourth valve seat 40, the first passage 16, the second passage 26, and the third passage 36 and the fourth passage 46 communicate with each other, wherein the communicating second passage 26, the third passage 36, and the fourth passage 46 form a valve core passage 70, and the valve core passage 70 communicates with the piston chamber 42. The valve core 52 is disposed in the valve core passage 70. The connecting portion 520 of the valve core 52 is located in the piston chamber 42 for connecting the piston plate 54. The stopping portion 526 is located in the second passage 26, and an end surface of the stopping portion 526 is opposite to the open end of the first passage 16. In addition, the inner wall surface of the valve core passage 70 has a plurality of oil seal elements 72, and each of the oil seal elements 72 can contact the outer surface of the valve core 52.

The cover 60 is closed on the fourth valve seat 40 to close the piston chamber 42. It can be understood that the first valve seat 10, the second valve seat 20, the third valve seat 30, the fourth valve seat 40, and the cover 60 can be worn by an appropriate locking element 62 after being stacked and combined. Pass all parts and form a locked state.

Referring to FIG. 2, the third channel 36 includes a first chamber 360 connected to a second chamber 362. An inner diameter of the first chamber 360 is larger than an inner diameter of the second chamber 362. The second The chamber 362 is connected to the second channel 26, and the inner diameter of the second chamber 362 is smaller than the inner diameter of the second channel 26, so that the joint between the second channel 26 and the second chamber 362 forms an abutment.止 缘 74。 Stop edge 74.

The outer diameter of the reduced portion 524 of the valve core 52 is smaller than the inner diameter of the second cavity 362, so a gap 76 is formed between the outer surface of the reduced portion 524 and the inner wall surface of the second cavity 362. The thickness (d) of the stopping portion 526 of the valve core 52 may be equal to the inner diameter of the port of the second flow channel 24. The valve core 52 moves upward, and the stopping portion 526 abuts against the abutting edge 74.

Referring to FIG. 3, an appropriate liquid is input from the second control liquid inlet 48 into the piston chamber 42 to push the piston plate 54 to displace the valve core 52 upward. Referring to FIGS. 3 and 4, the upward displacement of the valve core 52 can cause the stopping portion 526 to abut against the abutting edge 74 to stop the third channel 36. In this way, the first fluid 82 from a first cartridge 80 can enter through the first inlet 12 (see FIG. 3), enter the second channel 26 through the first channel 16, and then pass through the first channel 16. The second runner 24 is output from the outlet 22.

Referring to FIG. 5, an appropriate liquid is input from the first control liquid inlet 47 into the piston chamber 42 to push the piston plate 54 to displace the valve core 52 downward. Referring to FIGS. 5 and 6, downward displacement of the valve core 52 can cause the end surface of the stopper portion 526 to abut against the open end of the first passage 16, thereby stopping the first passage 16. In this way, the second fluid 86 from a second cartridge 84 can enter from the second inlet 32, enter the second channel 26 through the third channel 36 and the gap 76, and then pass through the second flow channel. 24 is output from the outlet 22.

Please refer to FIG. 7. It is worth noting that since the thickness (d) of the stop portion 526 of the valve core 52 is equal to the inner diameter of the second flow passage 24, during the downward displacement of the valve core 52, When the valve core 52 is not completely opposite the second flow path 24, the first fluid 82 can still pass through the first The channel 16 and the second channel 26 are output from the outlet 22. When the stop portion 526 of the valve core 52 is completely opposite to the second flow path 24, neither the first fluid 82 from the first passage 16 nor the second fluid 86 from the third passage 36 can enter the The second flow channel 24; however, at the next instant of displacement, the stop portion 526 no longer blocks the second flow channel 24, and the end surface of the stop portion 526 is against the first channel 16 to stop the first fluid. 82. At this time, the second fluid 86 can enter the second flow channel 24 and be output by the outlet 22. This can achieve the effect of instantaneously switching the first fluid 82 and the second fluid 86 into the second passage 26, the second flow passage 24, and output from the outlet 22.

Conversely, the upward displacement of the valve core 52 can also achieve the instantaneous switching of the first fluid 82 and the second fluid 86 into the second channel 26 by the relative position of the stop portion 526 to the second flow channel 24. , The effect of the second flow channel 24 and the output from the outlet 22.

Since the first fluid 82 from the first cylinder 80 and the second fluid 86 from the second cylinder 84 are the same material, the use timing of the present invention may be the first fluid in the first cylinder 80 When a fluid 82 is about to run out, the second fluid 86 of the second cartridge 84 is ready to replace the first fluid 82. In particular, the change in the position of the valve core 52 relative to the second flow channel 24 provides an instantaneous switching function, so the empty window period of the material injection generated during the switching process can be greatly shortened, which can maintain a stable supply and achieve the material supply. The effect of smooth body flow (no obvious ripple).

The above-mentioned embodiments are merely for illustrative purposes to illustrate the technology of the present invention and its effects, and are not intended to limit the present invention. Anyone skilled in the art can modify and change the above embodiments without violating the technical principles and spirit of the present invention. Therefore, the scope of protection of the rights of the present invention should be listed in the scope of patent application described below. .

Claims (4)

A switching valve structure for switching output of fluids from different input sources includes a first valve seat having a first inlet on a peripheral side, and the first valve seat has a first flow passage and a first Channel, the two ends of the first flow channel are in communication with the first inlet and the first channel, the first inlet allows a first fluid to enter the first valve seat; a second valve seat with an outlet on the peripheral side, The second valve seat has a second flow passage and a second passage inside, the two ends of the second flow passage communicate with the outlet and the second passage, and the second valve seat is stacked on the first valve seat. The second passage is in communication with the first passage; a third valve seat has a second inlet on the peripheral side, and the third valve seat has a third flow passage and a third passage inside, the third passage A valve seat is stacked on the second valve seat, and the two ends of the third flow passage communicate with the second inlet and the third passage, respectively. The third passage is in communication with the second passage, and the second inlet is provided for communication. A second fluid enters the third valve seat; a fourth valve seat has a piston chamber in the axial direction, and the piston One end is an open end, and the other end opposite the open end is a bottom. The bottom has a fourth channel communicating with the piston chamber. The fourth valve seat is stacked on the third valve seat. The fourth channel and the The third channel is connected to form a communication; a switching component is composed of a piston plate and a valve core, and the piston plate is arranged in the piston chamber of the fourth valve seat, and the valve core passes through the second valve forming communication. Channel, the third channel and the fourth channel, one end of the valve core is fixedly connected to the piston plate, the other end of the valve core forms a stopper and is located in the second channel, and the end faces of the stopper are opposite to each other In the first channel and the third channel, the movement of the valve core can make the side of the stop portion approach and away from the outlet. The inner diameter of the ports of the channel is the same; a cover is arranged in the axial direction of the fourth valve seat and is used to seal the piston chamber; wherein, when the combination of the valve core and the piston plate is stressed, the stopper is at Linear displacement is generated in the second channel; when the end surface of the stopper part abuts against the first channel The second inlet is in communication with the outlet, and the second fluid can be output from the outlet; when the stopper portion abuts the third channel, the first inlet is in communication with the outlet, and the first fluid can be output from the outlet; The relative displacement of the side of the stopper portion to the outlet, and the abutment of the stopper portion to the first channel and the third channel are used to perform output switching of the first fluid and the second fluid. The switching valve structure according to item 1 of the scope of patent application, wherein the valve core includes a shaft section connected to a reduction section, and the reduction section is connected to the stopper, and the outer diameter of the reduction section is smaller than the inner diameter of the third channel. The diameter and the outer diameter of the shaft section cause a gap between the outer surface of the reduced section and the inner surface of the third channel. The stopper blocks the gap and the second fluid cannot flow to the outlet. The switching valve structure according to item 2 of the patent application scope, wherein the third channel inside the third valve seat includes a first chamber connected to a second chamber, and an inner diameter of the first chamber Larger than the inner diameter of the second chamber, the reduced section of the valve core is located in the first chamber, and the gap is formed between the outer surface of the reduced section and the wall surface of the second chamber. The switching valve structure according to item 3 of the scope of patent application, wherein the second chamber inside the third valve seat communicates with the two channels of the second valve seat, and the inner diameter of the second chamber is smaller than the first chamber. The inner diameters of the two channels, and the abutment edge is formed between the second chamber and the second channel, and the displacement of the valve core can make the stop portion abut against the abutment edge.