Multifunctional valve

Abstract

The present invention relates to an invention, and in particular to a multifunctional valve, comprising: a valve body, a valve stem, a valve seat, a disc plate, a valve plate, a driving device and a guiding mechanism; wherein the valve body has a flow channel, the valve seat is arranged in the valve body, and has a water passage hole connected to the flow channel, the valve stem is inserted into the valve body along an axial direction perpendicular to the flow channel, and enters the flow channel, the driving device is connected to the valve stem, and the guiding mechanism is used to drive the valve stem to move along an axial direction perpendicular to the flow channel, forcing the valve stem to rotate by a preset angle. Compared with the prior art, the valve plate is used to form a seal with the valve seat when the valve stem moves from the starting position to the ending position, and close the water passage hole; the disc plate is used to form a seal with the valve seat when the valve stem moves from the ending position to the starting position, and open the water passage hole, and the disc plate is also used to rotate with the valve stem during the movement of the valve stem from the starting position to the ending position, and adjust the opening of the water passage hole, so that the multifunctional valve has both the characteristics of a gate valve and a butterfly valve.

Description

Technical Field

[0001] The embodiments of the present invention relate to a switch valve, and more particularly to a multifunctional valve. Background Art

[0002] In long-distance pipelines such as oil and natural gas, the use of flat gate valves is becoming increasingly common. However, in industrial systems, it is usually necessary to throttle and adjust the flow and pressure of pipeline media. However, most existing flat gate valves are only used as switch valves. As for the regulation of the medium in the pipeline, due to the design of the flat gate valve itself, it is impossible to achieve accurate flow regulation like a butterfly valve in some special pipelines. If only a butterfly valve is used as a switch valve, its pressure resistance and sealing performance are far inferior to those of a gate valve after throttling the pipeline. Therefore, in order to avoid this phenomenon, a new valve needs to be provided. Summary of the invention

[0003] The purpose of the embodiments of the present invention is to design a multifunctional valve that can satisfy the throttling of the medium in the pipeline and realize the precise regulation of the medium flow in the pipeline.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a multifunctional valve, comprising: a valve body, a valve stem and a valve seat; wherein the valve body has a flow channel, and the two ends of the flow channel along its own axis are respectively an inlet side and an outlet side, the valve seat is arranged in the valve body, and has a water hole communicated with the flow channel, the valve stem is inserted into the valve body along the axis direction perpendicular to the flow channel, and enters the flow channel, and the multifunctional valve comprises:

[0005] The disc plate and the valve plate are both arranged on the valve stem; the disc plate and the valve plate are arranged opposite to each other along the axis direction of the valve stem;

[0006] A driving device, connected to the valve stem, and used to drive the valve stem to move along an axial direction perpendicular to the flow channel;

[0007] A guide mechanism is provided on the valve body and slidably cooperates with the valve stem; the guide mechanism is used to force the valve stem to rotate a preset angle when the valve stem moves in a direction perpendicular to the axis of the flow channel;

[0008] When the valve stem moves from the starting position to the ending position along the axis direction perpendicular to the flow channel, the valve stem first drives the disc plate to rotate by a preset angle to adjust the opening of the water passage, and then moves the disc plate out of the flow channel and brings the valve plate into the flow channel until a seal is formed between the valve plate and the valve seat to close the water passage;

[0009] When the valve stem moves from the end position to the start position along the axial direction perpendicular to the flow channel, the valve plate is moved out of the flow channel, and the disc plate is brought into the flow channel until a seal is formed between the disc plate and the valve seat.

[0010] It is not difficult to find from the above content that since the valve stem of the multifunctional valve is provided with a butterfly plate and a valve plate at the same time, and the butterfly plate and the valve plate are arranged relatively along the axis direction of the valve stem, and the multifunctional valve also includes: a driving device and a guiding mechanism, wherein the driving device is used to drive the valve stem to move along the axis direction perpendicular to the flow channel, and the guiding mechanism is arranged on the valve body, and the valve stem is slidably matched, and can force the valve stem to rotate a preset angle when the valve stem moves along the axis direction perpendicular to the flow channel. Therefore, in actual application, when the driving device drives the valve stem to move from the starting position to the end position, the valve plate can be brought into the flow channel by the valve plate, and a seal is formed between the valve seat and the valve seat to close the water hole. When the valve stem moves from the end position to the start position, the corresponding valve plate can be moved out of the flow channel, and the butterfly plate can then be brought into the flow channel by the valve stem to form a seal with the valve seat to open the water hole. At the same time, the disc plate is also used to rotate with the valve stem during the movement of the valve stem from the start position to the end position to achieve the purpose of adjusting the opening of the water hole. Therefore, the multifunctional valve of this embodiment has both the characteristics of a gate valve and a butterfly valve, that is, it can meet the throttling of the medium in the pipeline and realize precise adjustment of the opening of the water hole.

[0011] Furthermore, the disc plate is used to be parallel to the axial direction of the flow channel when the valve stem moves from the end position to the start position; the disc plate is also used to move out of the flow channel and perpendicular to the axial direction of the flow channel when the valve stem moves from the start position to the end position.

[0012] Furthermore, the valve plate and the disc plate are both fixedly connected to the valve stem, and the orthographic projection of the disc plate along the axial direction of the valve stem is located within the thickness range of the valve plate.

[0013] Furthermore, the valve plate is rotatably connected to the valve stem, and the disc plate is fixedly connected to the valve stem; the valve plate is always perpendicular to the axial direction of the flow channel.

[0014] Furthermore, the valve body also has a first accommodating chamber for accommodating the disc plate and a second accommodating chamber for accommodating the valve plate. The first accommodating chamber and the second accommodating chamber are relatively arranged along the axial direction of the valve stem, and are both connected to the flow channel; wherein the disc plate is used to enter the first accommodating chamber when the valve stem moves from the starting position to the ending position; and the valve plate is used to enter the second accommodating chamber when the valve stem moves from the ending position to the starting position.

[0015] Furthermore, the guiding mechanism comprises:

[0016] A positioning pin, arranged on the valve stem;

[0017] A bracket is arranged on the top of the valve body along the axis direction of the valve stem; a portion of the valve stem enters the bracket; and a sliding groove is provided on the bracket to slide with the positioning pin;

[0018] The positioning pin is used to cooperate with the slide groove when the valve stem moves from the starting position to the ending position, so as to drive the valve stem to rotate along the trajectory of the slide groove and around its own axis by a preset angle.

[0019] Furthermore, the slide groove includes: a vertical groove section extending along the axial direction of the valve stem and a spiral groove section connected to the vertical groove section; one end of the spiral groove section is connected to one end of the vertical groove section relative to the valve body, and the other end extends spirally toward the valve body and around the axial direction of the valve stem.

[0020] Furthermore, a first annular seal is provided on one side of the valve seat relative to the valve stem, and the first annular seal is used to form a first sealing surface with the valve plate;

[0021] A second annular seal is provided on one side of the valve seat opposite to the flow channel, and the second annular seal is used to form a second sealing surface with the disc plate.

[0022] Furthermore, the valve body is provided with an annular mounting groove around the axial direction of the flow channel, the valve seat is arranged in the annular mounting groove, and the valve seat comprises:

[0023] an annular seat body, arranged in the annular mounting groove and slidingly matched with the groove wall of the annular mounting groove; the first annular seal is arranged on a side of the annular seat body relative to the valve stem, and the second annular seal is arranged on a side of the annular seat body relative to the flow channel;

[0024] A plurality of rebound connection components; each of the rebound connection components is arranged at the bottom of the annular mounting groove and is equidistantly arranged around the axial direction of the annular seat body; each of the rebound connection components is connected to the annular seat body and is used to apply a rebound force to the annular seat body along the axial direction perpendicular to the valve stem.

[0025] Furthermore, the annular seat body is provided with a plurality of air inlet channels around its own axial direction; each of the air inlet channels has a first air inlet side opposite to the valve stem and a second air inlet side opposite to the groove wall of the annular mounting groove, and in any of the air inlet channels, the first air inlet side and the second air inlet side are interconnected. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0027] Figure 1 This is a schematic diagram of the internal structure of the valve body in the first embodiment of the present invention;

[0028] Figure 2 It is a schematic diagram of the assembly of the multifunctional valve according to the first embodiment of the present invention;

[0029] Figure 3 It is a schematic diagram of the positioning pin in the slide groove when the valve stem is in the end position in the first embodiment of the present invention;

[0030] Figure 4 It is a schematic diagram of the positioning pin in the slide groove when the valve stem moves from the end position to the start position in the first embodiment of the present invention;

[0031] Figure 5 It is a schematic diagram of the positioning pin in the slide groove when the valve stem is in the starting position in the first embodiment of the present invention;

[0032] Figure 6 for Figure 1 A partial enlarged view of the middle A part;

[0033] Figure 7 It is a schematic diagram of the assembly of the valve seat and the valve body in the second embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the embodiments of the present invention, many technical details are provided to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can be implemented.

[0035] A first embodiment of the present invention relates to a multifunctional valve, such as Figure 1 and Figure 2 As shown, it comprises: a valve body 1, a valve stem 2 and a valve seat 3. The valve body 1 has a flow channel 11, and the two ends of the flow channel 11 along its own axis are an inlet side 111 and an outlet side 112 respectively. The valve seat 3 is arranged in the valve body 1 and has a water hole 31 connected with the flow channel 11. The valve stem 2 is inserted into the valve body 3 along the axis direction perpendicular to the flow channel 11 and enters the flow channel 11.

[0036] And, if Figure 1 and Figure 2 As shown, the multifunctional valve of this embodiment includes: a disc plate 4 and a valve plate 5 both arranged on the valve stem 2 , and the disc plate 4 and the valve plate 5 are arranged opposite to each other along the axial direction of the valve stem 2 .

[0037] In addition, if Figure 1 and Figure 2 As shown, the multifunctional valve of this embodiment further includes: a driving device 6 connected to the valve stem 2, and a guide mechanism 7 disposed on the valve body 3. The driving device 6 is used to drive the valve stem 2 to move along the axis direction perpendicular to the flow channel 11. The guide mechanism 7 is slidably matched with the valve stem 2, and the guide mechanism 7 is used to force the valve stem 2 to rotate a preset angle when the valve stem 2 moves along the axis direction perpendicular to the flow channel 11.

[0038] In actual application, Figure 1 and Figure 2 As shown, the valve stem 2 can move along the axis direction perpendicular to the flow channel 11 under the drive of the driving device 6, that is, when the valve stem 2 moves from the starting position to the ending position along the axis direction perpendicular to the flow channel 11, the valve stem 2 can first drive the disc plate 4 to rotate by a preset angle, so as to adjust the opening of the water hole 31, and then the valve stem 2 moves the disc plate 4 out of the flow channel 11, and brings the valve plate 5 into the flow channel 11, until a seal is formed between the valve plate 5 and the valve seat 3, and the water hole 31 is closed. When the valve stem 2 moves from the ending position to the starting position along the axis direction perpendicular to the flow channel 11, the valve stem 2 can move the valve plate 3 out of the flow channel 11, and the disc plate 4 can be brought into the flow channel 11, until a seal is formed between the disc plate 4 and the valve seat 3, so as to open the water hole 31, and the disc plate 4 can adjust the opening of the water hole 31. It is not difficult to see that the multifunctional valve of this embodiment has both the characteristics of a gate valve and a butterfly valve, that is, it can satisfy the throttling of the medium in the pipeline and the regulation of the flow of the medium in the pipeline.

[0039] Specifically, in this embodiment, if Figure 1 and Figure 2As shown, when the valve stem 2 moves from the end position to the start position, the disc plate 4 is parallel to the axis direction of the flow channel 11, that is, the disc plate 4 is in a state of fully opening the water hole 31 of the valve seat 3, that is, the opening of the water hole 31 is the largest at this time. When the valve stem 2 moves from the start position to the end position, the guide mechanism 7 can be used to slide with the valve stem 2, so that the valve stem 2 can drive the disc plate 4 to rotate a preset angle, that is, the disc plate 4 can achieve the purpose of adjusting the opening of the water hole 31 by its own rotation, until the disc plate 4 is completely perpendicular to the axis of the flow channel 11, that is, the disc plate 4 completely closes the water hole 31. At this time, the valve stem 2 continues to be driven by the driving device 6 to move to the end position. At this time, the disc plate 4 can be gradually moved out of the flow channel 11 under the drive of the valve stem 2, and the corresponding valve plate 5 is brought into the flow channel 11, and when the valve stem 2 moves to the start position, the valve plate 5 can completely close the water hole 31, thereby achieving the purpose of throttling the medium in the flow channel 11.

[0040] Furthermore, it is worth mentioning that in order to satisfy the rotation drive of the valve stem 2 by the guide mechanism 7, Figures 2 to 5 As shown, the guide mechanism 7 includes: a bracket 71 arranged on the top of the valve body 1, and a positioning pin 72 arranged on the valve stem 2. Among them, the bracket 71 is arranged along the axial direction of the valve stem 2, and the positioning pin 72 is arranged along the axial direction perpendicular to the valve stem 2, and the valve stem 2 partially enters the bracket 71 and is rotatably connected with the bracket 71. At the same time, a slide groove 73 that can slide with the positioning pin 72 is also provided on the bracket 71, and the slide groove 73 slides with the positioning pin 72. For example, the two sides of the bracket 71 are respectively provided with a slide groove 73, the positioning pin 72 passes through the valve stem 2, and the two ends of the positioning pin 72 are respectively penetrated in the slide grooves 73 on both sides of the bracket 71, and slide with the slide groove 73. Through the cooperation of the two ends of the positioning pin 72 with the slide grooves 73 on both sides of the bracket 71, the lifting and rotating movement of the valve stem 2 can be realized. In actual application, the positioning pin 72 is used to cooperate with the slide groove 73 when the valve stem 2 moves from the starting position to the end position, and forcibly drives the valve stem 2 to rotate around its own axis by a preset angle.

[0041] Specifically, in this embodiment, if Figure 1 and Figure 2 As shown, the valve body 1 also has a first accommodating chamber 12 for accommodating the disc plate 4 and a second accommodating chamber 13 for accommodating the valve plate 5. The first accommodating chamber 12 and the second accommodating chamber 13 are arranged opposite to each other along the axis direction of the valve stem 2, and are both connected to the flow channel 11, that is, the first accommodating chamber 12 is located at the top of the flow channel 11, and the second accommodating chamber 13 is located at the bottom of the flow channel 11. Therefore, through Figure 1It is not difficult to see that when the valve stem 2 is in the starting position, the valve plate 5 is located in the second accommodating chamber 13, and the disc plate 4 is located in the flow channel 11 and forms a seal with the valve seat 3, and when the valve stem 2 moves from the starting position to the ending position, the disc plate 4 can be moved out of the flow channel 11 and enter the first accommodating chamber 12, and the corresponding valve plate 5 will leave the second accommodating chamber 13, and be brought into the flow channel 11 by the valve stem 2, and form a seal with the valve seat 3. Conversely, when the valve plate 2 moves from the ending position to the starting position, the valve plate 5 can be moved out of the flow channel 11 driven by the valve stem 2 and re-enter the second accommodating chamber 13, and the corresponding disc plate 4 can re-enter the flow channel 11 from the first accommodating chamber 12 and form a seal with the valve seat 3.

[0042] In addition, in this embodiment, combined with Figures 3 to 5 As shown. The slide groove 73 includes: a vertical groove section 731 extending along the axial direction of the valve stem 2, and a spiral groove section 732 connected to the vertical groove section 731. Among them, one end of the spiral groove section 732 is connected to one end of the vertical groove section 731 relative to the valve body 1, and the other end of the spiral groove section 732 is directed toward the valve body 1 and spirally extends around the axial direction of the valve stem 2. It is not difficult to see that when the valve stem 2 moves from the starting position to the ending position in the initial stage along the axial direction perpendicular to the flow channel 11, as shown in FIG. Figure 3 and Figure 4 As shown, the valve stem 2 can firstly use the spiral groove section 732 to forcibly guide the positioning pin 72 by means of the cooperation between the spiral groove section 732 and the positioning pin 72, forcing the positioning pin 72 to drive the valve stem 2 to rotate at a certain angle, and the disc plate 4 can rotate synchronously with the valve stem 2 under the rotation of the valve stem 2, thereby adjusting the opening of the water hole 31. When the disc plate 4 rotates to a direction perpendicular to the axis of the flow channel 11, as shown in FIG. Figure 4 and Figure 5 As shown, at this time, if the driving device 6 continues to drive the valve stem 2 to move toward the end position, the positioning pin 72 can directly enter the vertical groove section 731 of the slide groove 73. With the help of the sliding cooperation between the vertical groove section 731 and the positioning pin 72, the valve stem 2 can drive the disc plate 4 and the valve plate 5 to move linearly, gradually moving the disc plate 4 out of the flow channel 11 and gradually bringing it into the first accommodating chamber 12, and bringing the valve plate 5 from the second accommodating chamber 13 into the flow channel 11, and gradually closing the water hole 31. On the contrary, if Figures 3 to 5 As shown, when the driving device 6 drives the valve stem 2 to move from the end position to the starting position, the valve plate 5 can be gradually moved out of the flow channel 11 by the valve stem 2 and re-enter the second accommodating chamber 13, and the disc plate 4 can be moved back into the flow channel 11 from the first accommodating chamber 12 and re-establish the seal with the valve seat 3.

[0043] It is not difficult to see that, with the help of the cooperation between the positioning pin 72 and the spiral groove section 732 and the vertical groove section 731 of the slide 73, not only the linear lifting movement of the valve stem 2 is realized, but also the rotational movement of the valve stem 2 can be realized in the initial stage of the movement of the valve stem 2 from the starting position to the end position, so that the valve plate 5 can block the water hole 31, complete the throttling effect of the medium in the flow channel 11, and can also ensure that the disc plate 4 adjusts the opening of the water hole 31 to achieve precise control of the flow of the medium in the flow channel 11. At the same time, with the help of the cooperation between the spiral groove section 732 and the vertical groove section 731, the valve stem 2 can feedback a certain sense of segmentation to the staff through the manual drive device during the movement from the starting position to the end position, so that the staff can further improve the controllability of the valve stem 2.

[0044] Furthermore, it should be noted that, in order to realize the driving of the valve stem 2, in this embodiment, Figure 2 As shown, the driving device 6 can be a hand wheel driving device, and by manually rotating the hand wheel, the lifting and lowering linear motion of the valve stem 2 can be realized. Alternatively, the driving device 6 can also be an electric driving device, through which the lifting and lowering motion of the valve stem 2 can be automatically controlled, so that the rotation of the disc plate 4 can be more accurately adjusted.

[0045] In addition, it is worth mentioning that, in this embodiment, the valve plate 5 can be fixedly connected to the valve stem 2, or can be rotatably connected to the valve stem 2. Figure 1 and Figure 2 As shown, when the valve plate 5 and the valve stem 2 are fixedly connected, that is, the valve plate 5 and the valve stem 2 are locked and fixed by the corresponding locking member, the valve plate 5 and the disc plate 4 are arranged in the same direction, that is, the positive projection of the disc plate 4 along the axis direction of the valve stem 2 is always within the thickness range of the valve plate 5. Therefore, when the valve stem 2 moves from the starting position to the ending position, when the disc plate 4 rotates to a position perpendicular to the axis direction of the flow channel 11 following the valve stem 2, the valve plate 5 is also at this position. At this time, when the disc plate 4 and the valve plate 5 rise with the valve stem 2 again, they can directly pass through the joint of the first accommodating chamber 12 and the flow channel 11, and the joint of the second accommodating chamber 13 and the flow channel 11, respectively, so that the valve body 1 itself will not interfere with the rise of the disc plate 4 and the valve plate 5, and vice versa.

[0046] When the valve plate 5 and the valve stem 2 are connected in a rotating manner, that is, the valve plate 5 and the valve stem 2 can be pivoted with each other by a shaft sleeve, so that when the valve stem 2 rotates, the valve plate 5 will not rotate with the rotation of the valve stem 2. Therefore, when the valve plate 5 is installed, it is ensured that the valve plate 5 is always perpendicular to the axis of the flow channel 11. In this way, it can also be ensured that the valve body 1 will not interfere with the disc plate 4 and the valve plate 5 when they are lifted and lowered, so that the lifting and lowering movement of the disc plate 4 and the valve plate 5 can be realized.

[0047] In addition, in order to achieve the sealing between the disc plate 4, the valve plate 5 and the valve seat 3, in this embodiment, as shown in FIG. Figure 6 As shown, a first annular seal 8 is provided on the side of the valve seat 4 relative to the valve stem 2, and the first annular seal 8 is used to form a first sealing surface (not shown in the figure) with the valve plate 5. At the same time, a second annular seal 9 is provided on the side of the valve seat 3 relative to the flow channel 11, and the second annular seal 9 is used to form a second sealing surface (not shown in the figure) with the disc plate 4.

[0048] Specifically, in this embodiment, if Figure 6 As shown, the valve body 1 is provided with an annular mounting groove 14 around the axial direction of the flow channel 11, and the valve seat 3 is arranged in the annular mounting groove 14. In addition, the valve seat 3 comprises: an annular seat body 21 arranged in the annular mounting groove 14, a first annular seal 8 arranged on the side of the annular seat body 21 relative to the valve stem 2, and a second annular seal 9 arranged on the side of the annular seat body 21 relative to the flow channel 11. The first annular seal 8 is used to form a seal with the valve plate 5 after the valve plate 5 enters the flow channel 11, and the second annular seal 9 is used to form a seal with the disc plate 4 after the disc plate 4 enters the flow channel 11, and the annular seat body 21 is also slidably matched with the groove wall 141 of the annular mounting groove 14.

[0049] In addition, in this embodiment, if Figure 6 As shown, the valve seat 3 also includes: a plurality of rebound connection components 24. And each rebound connection component 24 is arranged at the groove bottom 142 of the annular mounting groove 14, and each rebound connection component is equidistantly arranged around the axial direction of the annular seat body 21. Each rebound connection component 24 is connected to the annular seat body 21, and is used to apply a rebound force to the annular seat body 21 along the axial direction perpendicular to the valve stem 2. It is not difficult to see that, with the help of the rebound force applied to the annular seat body 21 by each rebound connection component 24, the disc plate 4 can always fit tightly with the second annular seal 9 on the annular seat body 21 during the process of following the rotation of the valve stem 2, thereby avoiding leakage. And it should be noted that, in this embodiment, each rebound connection component 24 is as follows Figure 6 As shown, it specifically includes: a bolt 241 arranged in the annular mounting groove 14, a spring 242 sleeved on the bolt 241, and the root of the bolt 241 is fixed on the groove bottom 142 of the annular mounting groove 14, and the spring 242 is respectively connected to the groove bottom of the annular mounting groove 142 and the annular seat body 21. In actual application, with the help of the rebound force applied by each spring 242 to the annular seat body 21, the annular seat body 21 can always slide in the direction of the valve stem 2, thereby realizing the sealing of the first annular seal 8 and the valve plate 5, and realizing the sealing of the second annular seal 9 and the disc plate 4.

[0050] In addition, the first annular seal 21 and the second annular seal 22 used in this embodiment can be flexible sealing rings such as rubber, silicone or plastic, or can also be metal hard seals to achieve sealing with the valve plate 5 and the disc plate 4 respectively.

[0051] In addition, as a preferred solution, Figure 1 and Figure 2 As shown, in this embodiment, two valve seats 3 may be provided, and the two valve seats 3 may be respectively arranged with the axis of the valve stem 2 as the axis of symmetry, so that the two valve seats 3 can always apply a rebound force to the valve plate 5 or the butterfly plate 4, thereby further improving the sealing performance between the valve plate 5 or the butterfly plate 4 and the valve seat 3.

[0052] The second embodiment of the present invention relates to a multifunctional valve. The second embodiment is a further improvement on the first embodiment. The main improvement is as follows: Figure 7 As shown, the annular seat body 21 is further provided with a plurality of air inlet channels 25 around its own axis direction, and each air inlet channel 25 has a first air inlet side 251 disposed opposite to the valve stem 2 and a second air inlet side 252 disposed opposite to the groove wall 141 of the annular mounting groove 14. At the same time, in any air inlet channel 25, the first air inlet side 251 and the second air inlet side 252 are communicated with each other.

[0053] It is not difficult to see from the above contents that, by opening each air inlet channel 25 on the annular seat body 21, the air inlet channel 25 can be always filled with gas, so that when the valve plate 5 follows the valve stem 2 to perform lifting and lowering movements, the first air inlet side 251 can be used to avoid the formation of a vacuum zone between the annular seat body 21 and the valve plate 5, which causes the valve plate 5 to be stuck, so that the valve plate 5 can smoothly follow the valve stem 2 to perform linear movement between the first flow channel 11 and the second accommodating chamber 13. At the same time, by means of the second air inlet side 252, the annular seat body 21 can quickly slide freely in the annular mounting groove 14 with the help of each rebound connection component 24 during the rotation of the disc plate 4, avoiding the formation of a vacuum zone between the annular seat body 21 and the groove wall of the annular mounting groove 14, which causes the annular seat body 21 to be stuck in the annular mounting groove 14, so that the second annular seal 9 can always be closely attached to the disc plate 4, thereby improving its sealing performance.

[0054] As a preferred solution, in order to further improve the sealing performance between the annular seat body 21 and the groove wall 141 and the groove bottom 142 of the annular mounting groove 14, as shown in FIG. Figure 7 As shown, the annular seat body 21 is also provided with a sealing ring 10 and a sealing ring 20, through which the annular seat body can form sealing surfaces with the groove wall 141 and the groove bottom 142 of the annular mounting groove 14 respectively, thereby further improving the sealing performance between the annular mounting groove 14 and the annular seat body 21.

[0055] Those skilled in the art will appreciate that the above-mentioned embodiments are specific embodiments for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A multifunctional valve, comprising: A valve body, a valve stem and a valve seat; wherein the valve body has a flow channel, and the two ends of the flow channel along its own axis are respectively an inlet side and an outlet side, the valve seat is arranged in the valve body and has a water hole connected to the flow channel, the valve stem is inserted into the valve body along the axis direction perpendicular to the flow channel and enters the flow channel, characterized in that the multifunctional valve comprises: The disc plate and the valve plate are both arranged on the valve stem; the disc plate and the valve plate are arranged opposite to each other along the axis direction of the valve stem; A driving device, connected to the valve stem, and used to drive the valve stem to move along an axial direction perpendicular to the flow channel; A guide mechanism is provided on the valve body and slidably cooperates with the valve stem; the guide mechanism is used to force the valve stem to rotate a preset angle when the valve stem moves in a direction perpendicular to the axis of the flow channel; When the valve stem moves from the starting position to the ending position along the axis direction perpendicular to the flow channel, the valve stem first drives the disc plate to rotate by a preset angle to adjust the opening of the water passage, and then moves the disc plate out of the flow channel and brings the valve plate into the flow channel until a seal is formed between the valve plate and the valve seat to close the water passage; When the valve stem moves from the end position to the start position along the axis direction perpendicular to the flow channel, the valve plate is moved out of the flow channel, and the disc plate is brought into the flow channel until a seal is formed between the disc plate and the valve seat; The disc plate is used to be parallel to the axial direction of the flow channel when the valve stem moves from the end position to the start position; The disc plate is also used to move out of the flow channel and perpendicular to the axial direction of the flow channel when the valve stem moves from the starting position to the ending position; The valve plate and the disc plate are both fixedly connected to the valve stem, and the orthographic projection of the disc plate along the axis direction of the valve stem is located within the thickness range of the valve plate.

2. The multifunctional valve according to claim 1, characterized in that: The valve plate is rotatably connected to the valve stem, and the disc plate is fixedly connected to the valve stem; the valve plate is always perpendicular to the axial direction of the flow channel.

3. The multifunctional valve according to claim 1, characterized in that: The valve body also has a first accommodating chamber for accommodating the disc plate and a second accommodating chamber for accommodating the valve plate. The first accommodating chamber and the second accommodating chamber are arranged opposite to each other along the axis direction of the valve stem and are both communicated with the flow channel. Wherein, the disc plate is used to enter the first accommodating chamber when the valve stem moves from the starting position to the ending position; the valve plate is used to enter the second accommodating chamber when the valve stem moves from the ending position to the starting position.

4. The multifunctional valve according to claim 1, characterized in that: The guiding mechanism comprises: A positioning pin, arranged on the valve stem; A bracket is arranged on the top of the valve body along the axis direction of the valve stem; a portion of the valve stem enters the bracket; and a sliding groove is provided on the bracket to slide with the positioning pin; The positioning pin is used to cooperate with the slide groove when the valve stem moves from the starting position to the ending position, so as to drive the valve stem to rotate along the trajectory of the slide groove and around its own axis by a preset angle.

5. The multifunctional valve according to claim 4, characterized in that: The slide groove comprises: a vertical groove section extending along the axis direction of the valve stem, and a spiral groove section connected to the vertical groove section; One end of the spiral groove section is connected to one end of the vertical groove section relative to the valve body, and the other end is spirally extended toward the valve body and around the axial direction of the valve stem.

6. The multifunctional valve according to any one of claims 1 to 5, characterized in that: A first annular seal is provided on one side of the valve seat relative to the valve stem, and the first annular seal is used to form a first sealing surface with the valve plate; A second annular seal is provided on one side of the valve seat opposite to the flow channel, and the second annular seal is used to form a second sealing surface with the disc plate.

7. The multifunctional valve according to claim 6, characterized in that: The valve body is provided with an annular mounting groove around the axis direction of the flow channel, the valve seat is arranged in the annular mounting groove, and the valve seat comprises: an annular seat body, arranged in the annular mounting groove and slidingly matched with the groove wall of the annular mounting groove; the first annular seal is arranged on a side of the annular seat body relative to the valve stem, and the second annular seal is arranged on a side of the annular seat body relative to the flow channel; A plurality of rebound connection components; each of the rebound connection components is arranged at the bottom of the annular mounting groove and is equidistantly arranged around the axial direction of the annular seat body; each of the rebound connection components is connected to the annular seat body and is used to apply a rebound force to the annular seat body along the axial direction perpendicular to the valve stem.

8. The multifunctional valve according to claim 7, characterized in that: The annular seat body is also provided with a plurality of air inlet passages around its own axis direction; Each of the air intake channels has a first air intake side arranged opposite to the valve stem and a second air intake side arranged opposite to the groove wall of the annular mounting groove. In any of the air intake channels, the first air intake side and the second air intake side are connected to each other.

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