A rotary reversing valve and a high-pressure disc valve

Abstract

The present invention belongs to the technical field of valves, and particularly relates to a rotary reversing valve and a high-pressure disc valve. The high-pressure disc valve includes a housing, a cylinder assembly, a rotary reversing valve, a first valve disc, a first piston, a second valve disc, and a second piston. Through the rotary reversing valve, the high-pressure gas in the inlet pipeline can be utilized to open or close the first valve disc and the second valve disc. Without a power source or other power devices, the opening and closing of the valve can be achieved. The operation of the valve is independent of external power support, enabling the valve to be installed in a wider range of positions; when the high-pressure disc valve is in the closed state, high-pressure gas can be accumulated in the middle cavity of the housing. When the gas pressure in the inlet pipeline decreases, the middle cavity can still maintain a high-pressure state, applying pressure to the first valve disc and the second valve disc to keep them tightly against the valve seat, maintaining good sealing performance of the high-pressure disc valve.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and particularly to a high-pressure disc valve. Background Art

[0002] In the field of valves, a driving device is usually required to be installed on the valve to provide power for operating the valve to open or close. For example, installing a motor or a hydraulic cylinder, etc., requires an additional power source, which is greatly restricted by the site. In remote oil and gas transportation pipelines, it is relatively difficult to obtain power. The installation and maintenance of other power devices (such as diesel engines) are also relatively troublesome. The valve disc is heavy and often cannot be manually operated.

[0003] Moreover, the sealing device of the disc valve usually only uses a sealing ring to contact and seal with the valve disc. When the sealing ring wears, the sealing performance cannot be maintained, the sealing property weakens, and thus leakage occurs. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the prior art such as the disc valve relying on external power devices and poor sealing performance, and to propose a high-pressure disc valve.

[0005] To achieve the above object, according to the first aspect of the present invention, the present invention provides a rotary reversing valve, which includes a valve body and a valve core. The valve core is rotatably arranged in the inner cavity of the valve body. A first flow channel and a second flow channel are provided in the valve core. The first flow channel includes a horizontally arranged first arc-shaped flow channel, a first transverse flow channel, a second transverse flow channel, and vertically arranged first vertical flow channel and second vertical flow channel. One end of the first arc-shaped flow channel is simultaneously connected to the first vertical flow channel and the first transverse flow channel, and the other end of the first arc-shaped flow channel is simultaneously connected to the second vertical flow channel and the second transverse flow channel. The second flow channel includes a horizontally arranged second arc-shaped flow channel, a third transverse flow channel, and vertically arranged third vertical flow channel and fourth vertical flow channel. One end of the second arc-shaped flow channel is connected to the third vertical flow channel, and the other end of the second arc-shaped flow channel is simultaneously connected to the fourth vertical flow channel and the third transverse flow channel. The radius of the first arc-shaped flow channel is greater than that of the second arc-shaped flow channel, and the first transverse flow channel, the second transverse flow channel, and the third transverse flow channel are evenly distributed in the circumferential direction of the valve core. A pressure port and a pressure relief port are provided at the bottom of the inner cavity of the valve body. A first connecting pipe, a second connecting pipe, and a third connecting pipe are evenly installed on the outer circumference of the valve body. A fourth connecting pipe and a fifth connecting pipe are provided at the bottom of the valve body. The pressure port and the pressure relief port are respectively connected to the fourth connecting pipe and the fifth connecting pipe. The rotary reversing valve has three working positions. When the rotary reversing valve is in the first working position, the first transverse flow channel, the second transverse flow channel, and the third transverse flow channel are respectively connected to the first connecting pipe, the second connecting pipe, and the third connecting pipe. The second vertical flow channel is connected to the pressure port, and the fourth vertical flow channel is connected to the pressure relief port. When the rotary reversing valve is in the second working position, the first transverse flow channel, the second transverse flow channel, and the third transverse flow channel are respectively connected to the second connecting pipe, the third connecting pipe, and the first connecting pipe. The first vertical flow channel is connected to the pressure port, and the third vertical flow channel is connected to the pressure relief port. When the rotary reversing valve is in the third working position, the first transverse flow channel, the second transverse flow channel, and the third transverse flow channel are respectively connected to the third connecting pipe, the first connecting pipe, and the second connecting pipe. The pressure port and the pressure relief port are closed by the lower end surface of the valve core.

[0006] Preferably, a valve cover is fixedly provided at the top of the valve body.

[0007] Preferably, it further includes a valve rod. The top of the valve core is fixedly connected to the valve rod, and the valve rod is connected to a driving device.

[0008] Preferably, the driving device is a motor or a handwheel.

[0009] According to a second aspect of the present invention, the present invention further provides a high-pressure disc valve, including a rotary reversing valve, and further including: a housing, a flow passage is provided inside the housing, an inlet is provided at one end of the flow passage, an outlet is provided at the other end of the flow passage, the middle part of the flow passage is a middle cavity, an installation sleeve is integrally formed on the upper part of the housing, the middle cavity extends upward into the installation sleeve, and a first valve seat and a second valve seat are respectively provided on the housing on both sides of the middle cavity; a cylinder assembly, the cylinder assembly is fixedly installed on the top of the installation sleeve, a cylinder head is hermetically installed on the top of the cylinder assembly, the cylinder assembly includes a first cylinder and a second cylinder, a first piston is slidably arranged in the first cylinder, a second piston is slidably arranged in the second cylinder, the first piston divides the inner cavity of the first cylinder into a first lower cavity and a first upper cavity, the second piston divides the inner cavity of the second cylinder into a second lower cavity and a second upper cavity, the lower end of the first piston is connected to a first valve disc through a first valve rod, the second piston is connected to a second valve disc through a second valve rod, the first valve disc can cooperate with the first valve seat to block the passage facing the inlet, and the second valve disc can cooperate with the second valve seat to block the passage facing the outlet; an upstream air inlet for connecting a fourth connecting pipe is provided on one side of the housing close to the inlet, a downstream air outlet for connecting a fifth connecting pipe is provided on one side of the housing close to the outlet, a middle cavity connection hole communicating with the middle cavity is provided on the lower side wall of the cylinder assembly, a first lower cavity connection hole connecting the first lower cavity of the first cylinder is further provided on the lower side wall of the cylinder assembly, a second upper cavity connection hole communicating with the second upper cavity is provided on the top of the cylinder assembly, and the first lower cavity connection hole, the middle cavity connection hole, and the second upper cavity connection hole are respectively communicated with a first connecting pipe, a second connecting pipe, and a third connecting pipe; a first pressure leakage channel and a second pressure leakage channel are provided between the inner cavities of the first cylinder and the second cylinder, the first pressure leakage channel is used for communicating the first lower cavity and the second lower cavity, and the second pressure leakage channel is used for the first upper cavity and the second upper cavity.

[0010] Preferably, a first spring is provided between the first piston and the cylinder head, and a second spring is provided between the second piston and the cylinder head.

[0011] Preferably, when the rotary reversing valve is in the first working position, the first lower cavity connection hole and the middle cavity connection hole communicate with the upstream air inlet, and the second upper cavity connection hole communicates with the downstream air outlet; when the rotary reversing valve is in the second working position, the middle cavity connection hole and the second upper cavity connection hole communicate with the upstream air inlet, and the first lower cavity connection hole communicates with the downstream air outlet; when the rotary reversing valve is in the third working position, the pressurizing port and the pressure relief port are both closed.

[0012] Preferably, when the first piston moves to the highest point, the first pressure leakage channel communicates the first lower cavity and the second lower cavity.

[0013] Preferably, a baffle is abutted against one side of the first valve disc away from the first valve seat, the baffle is fixedly arranged on the inner wall of the valve body, the baffle is in a semi-circular convex shape, and the first valve disc is slidably arranged between the valve seat and the baffle.

[0014] Preferably, a check valve is provided on the fifth connecting pipe, so that the gas can only flow from the pressure relief port to the downstream air outlet.

[0015] A high-pressure disc valve proposed by the present invention has the following beneficial effects:

[0016] 1. By rotating the reversing valve, the high-pressure gas in the inlet pipe can be used to open or close the first valve disc and the second valve disc. Without a power supply or other power devices, the opening and closing of the valve can be achieved, and the operation of the valve is separated from external power support, making the installation position of the valve more extensive.

[0017] 2. When the high-pressure disc valve is in the closed state, high-pressure gas can be accumulated in the middle cavity of the housing. When the gas pressure in the inlet pipe decreases, the middle cavity can still remain in the high-pressure state, applying pressure to the first valve disc and the second valve disc to keep them tightly against the valve seat, maintaining the good sealing performance of the high-pressure disc valve.

[0018] 3. When the high-pressure disc valve is opened, the rotating reversing valve can connect the middle cavity with the inlet pipe, eliminating the pressure difference on both sides of the first valve disc and making it easier to open the first valve.

[0019] 4. By setting a pressure leakage channel between the first cylinder and the second cylinder, the first valve disc and the second valve disc can be opened sequentially, avoiding the valve disc vibration and damage caused by sudden pressure changes when the first valve disc and the second valve disc are opened simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments and descriptions thereof are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0021] Figure 1 is a schematic structural diagram of the rotating reversing valve of the present invention;

[0022] Figure 2 is a schematic structural diagram of the through hole at the bottom of the valve body of the rotating reversing valve of the present invention;

[0023] Figure 3 is a cross-sectional view of the valve core of the rotating reversing valve of the present invention;

[0024] Figure 4 is a cross-sectional view of the valve core of the rotating reversing valve of the present invention along the Figure 3 dotted line X-X in

[0025] Figure 5 is a schematic diagram of the position of the valve core of the rotating reversing valve of the present invention in the first working position;

[0026] Figure 6 is a schematic diagram of the position of the valve core of the rotating reversing valve of the present invention in the second working position;

[0027] Figure 7 Schematic diagram of the spool position when the rotary reversing valve of the present invention is in the third working position;

[0028] Figure 8 Schematic diagram of the structure of the high-pressure disc valve of the present invention in the closed state;

[0029] Figure 9 Schematic diagram of the structure of the high-pressure disc valve of the present invention during the opening process;

[0030] Figure 10 Schematic diagram of the fully opened structure of the high-pressure disc valve of the present invention.

[0031] In the figure: housing 1, inlet 101, outlet 102, middle cavity 103, upstream air inlet 104, downstream air outlet 105, baffle 106, mounting sleeve 107, first valve seat 108, second valve seat 109, cylinder assembly 2, middle cavity connection hole 2101, first lower cavity connection hole 2102, first lower cavity 2103, first upper cavity 2104, second lower cavity 2201, second upper cavity 2202, first pressure leakage channel 2301, second pressure leakage channel 2302, cylinder head 3, second upper cavity connection hole 301, first valve disc 401, first valve rod 402, first piston 403, second valve disc 501, second valve rod 502, second piston 503, valve body 6, first connecting pipe 601, second connecting pipe 602, third connecting pipe 603, fourth connecting pipe 604, fifth connecting pipe 605, pressurizing port 606, pressure relief port 607, valve cover 7, valve rod 8, spool 9, first arc-shaped flow channel 9101, first vertical flow channel 9102, first horizontal flow channel 9103, second vertical flow channel 9104, second horizontal flow channel 9105, second arc-shaped flow channel 9201, third vertical flow channel 9202, fourth vertical flow channel 9203, third horizontal flow channel 9204.

[0032] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present invention. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other arbitrarily.

[0034] Unless the context clearly requires otherwise, the words "comprising", "including" and similar words in the whole specification and claims shall be interpreted in an inclusive sense rather than an exclusive or exhaustive sense; that is to say, it is the meaning of "including but not limited to".

[0035] Refer to Figures 1-7, a first embodiment of the present invention is provided, and a rotary reversing valve is proposed, which includes a valve body 6 and a valve core 9. The valve core 9 is rotatably arranged in the inner cavity of the valve body 6. A first flow channel and a second flow channel are provided in the valve core 9. The first flow channel includes a horizontally arranged first arc-shaped flow channel 9101, a first transverse flow channel 9103, a second transverse flow channel 9105, and vertically arranged first vertical flow channels 9102 and 9104. One end of the first arc-shaped flow channel 9101 is simultaneously connected to the first vertical flow channel 9102 and the first transverse flow channel 9103, and the other end of the first arc-shaped flow channel 9101 is simultaneously connected to the second vertical flow channel 9104 and the second transverse flow channel 9105. The second flow channel includes a horizontally arranged second arc-shaped flow channel 9201, a third transverse flow channel 9204, and vertically arranged third vertical flow channels 9202 and 9203. One end of the second arc-shaped flow channel 9201 is connected to the third vertical flow channel 9202, and the other end of the second arc-shaped flow channel 9201 is simultaneously connected to the fourth vertical flow channel 9203 and the third transverse flow channel 9204. The radius of the first arc-shaped flow channel 9101 is greater than that of the second arc-shaped flow channel 9201. The first transverse flow channel 9103, the second transverse flow channel 9105, and the third transverse flow channel 9204 are evenly distributed in the circumferential direction of the valve core 9, that is, the included angles between the flow channel axes of the three are all 120°. A pressure port 606 and a pressure relief port 607 are provided at the bottom of the inner cavity of the valve body 6. The first connecting pipe 601, the second connecting pipe 602, and the third connecting pipe 603 are evenly installed on the outer circumference of the valve body 6 (the included angles between the flow channel axes of the three are also all 120°). The fourth connecting pipe 604 and the fifth connecting pipe 605 are provided at the bottom of the valve body 6. The pressure port 606 and the pressure relief port 607 are respectively connected to the fourth connecting pipe 604 and the fifth connecting pipe 605. The rotary reversing valve has three working positions. When the rotary reversing valve is in the first working position, the first transverse flow channel 9103, the second transverse flow channel 9105, and the third transverse flow channel 9204 are respectively connected to the first connecting pipe 601, the second connecting pipe 602, and the third connecting pipe 603. The second vertical flow channel 9104 is connected to the pressure port 606, and the fourth vertical flow channel 9203 is connected to the pressure relief port 607. When the rotary reversing valve is in the second working position, the first transverse flow channel 9103, the second transverse flow channel 9105, and the third transverse flow channel 9204 are respectively connected to the second connecting pipe 602, the third connecting pipe 603, and the first connecting pipe 601. The first vertical flow channel 9102 is connected to the pressure port 606, and the third vertical flow channel 9202 is connected to the pressure relief port 607. When the rotary reversing valve is in the third working position, the first transverse flow channel 9103, the second transverse flow channel 9105, and the third transverse flow channel 9204 are respectively connected to the third connecting pipe 603, the first connecting pipe 601, and the second connecting pipe 602. The pressure port 606 and the pressure relief port 607 are closed by the lower end surface of the valve core 9.By setting the flow channels and through-hole structures inside the valve core, the pressurization and pressure relief of each through-hole of the rotary reversing valve can be satisfied. The operation is simple, and each channel can also be closed to achieve three functions: pressurization, pressure relief, and closing.

[0036] The rotary reversing valve further includes a valve cover 7, and the valve cover 7 is fixedly provided at the top of the valve body 6; the rotary reversing valve further includes a valve rod 8, the top of the valve core 9 is fixedly connected to the valve rod 8, and the valve rod 8 is connected to a driving device. The driving device is a motor or a handwheel. The motor can be controlled by a controller, and the controller can be connected to a remote server through a wireless network, thus facilitating remote control. As a pilot valve for opening and closing the high-pressure disc valve, operating the rotary reversing valve is much easier than directly operating the high-pressure disc valve. Therefore, the handwheel required for operating the rotary reversing valve does not need to be too large, and it is very easy to operate manually. If a motor is used for operation, the size and power of the motor are also not large, and a smaller solar panel and battery can meet the power consumption needs of the motor.

[0037] Refer to Figures 8-10, a second embodiment of the present invention is provided, and a high-pressure disc valve is proposed, which includes the above-mentioned rotary reversing valve, and further includes: a housing 1, a flow passage is provided inside the housing 1, one end of the flow passage is provided with an inlet 101, the other end of the flow passage is provided with an outlet 102, the middle part of the flow passage is a middle cavity 103, an installation sleeve 107 is integrally formed on the upper part of the housing 1, the middle cavity 103 extends upward into the installation sleeve 107, and a first valve seat 108 and a second valve seat 109 are respectively provided on the housing 1 on both sides of the middle cavity 103; a cylinder assembly 2, the cylinder assembly 2 is fixedly installed on the top of the installation sleeve 107, a cylinder head 3 is hermetically installed on the top of the cylinder assembly 2, the cylinder assembly 2 includes a first cylinder and a second cylinder, a first piston 403 is slidably arranged in the first cylinder, a second piston 503 is slidably arranged in the second cylinder, the first piston 403 divides the inner cavity of the first cylinder into a first lower cavity 2103 and a first upper cavity 2104, the second piston 503 divides the inner cavity of the second cylinder into a second lower cavity 2201 and a second upper cavity 2202, the lower end of the first piston 403 is connected to a first valve disc 401 through a first valve rod 402, the second piston 503 is connected to a second valve disc 501 through a second valve rod 502, the first valve disc 401 can cooperate with the first valve seat 108 to block the passage facing the inlet 101, and the second valve disc 501 can cooperate with the second valve seat 109 to block the passage facing the outlet 102; an upstream air inlet 104 for connecting a fourth connecting pipe 604 is provided on one side of the housing 1 close to the inlet 101, a downstream air outlet 105 for connecting a fifth connecting pipe 605 is provided on one side of the housing 1 close to the outlet 102, a middle cavity connection hole 2101 communicating with the middle cavity 103 is provided on the lower side wall of the cylinder assembly 2, a first lower cavity connection hole 2102 connecting the first lower cavity 2103 of the first cylinder is further provided on the lower side wall of the cylinder assembly 2, a second upper cavity connection hole 301 communicating with the second upper cavity 2202 is provided on the top of the cylinder assembly 2, and the first lower cavity connection hole 2102, the middle cavity connection hole 2101, and the second upper cavity connection hole 301 are respectively communicated with a first connecting pipe 601, a second connecting pipe 602, and a third connecting pipe 603; a first pressure leakage channel 2301 and a second pressure leakage channel 2302 are provided between the inner cavities of the first cylinder and the second cylinder, the first pressure leakage channel 2301 is used for communicating the first lower cavity 2103 and the second lower cavity 2201, and the second pressure leakage channel 2302 is used for the first upper cavity 2104 and the second upper cavity 2202.

[0038] A first spring is provided between the first piston 403 and the cylinder head 3, and a second spring is provided between the second piston 503 and the cylinder head 3. By setting the spring, the valve disc can be more easily reset to the closed position. Of course, if the self-weight of the valve disc, valve rod, and piston is sufficient to ensure the downward movement of the valve disc, the spring may not be provided.

[0039] When the rotary direction-changing valve is in the first working position, the first lower chamber connection hole 2102 and the middle chamber connection hole 2101 communicate with the upstream air inlet 104, and the second upper chamber connection hole 301 communicates with the downstream air outlet 105; when the rotary direction-changing valve is in the second working position, the middle chamber connection hole 2101 and the second upper chamber connection hole 301 communicate with the upstream air inlet 104, and the first lower chamber connection hole 2102 communicates with the downstream air outlet 105; when the rotary direction-changing valve is in the third working position, the pressurizing port 606 and the pressure-relieving port 607 are both closed.

[0040] When the first piston 403 moves to the highest point, the first pressure bypass channel 2301 communicates the first lower chamber 2103 and the second lower chamber 2201, so that after the first valve disc is opened, the second valve disc can be opened through the first pressure bypass channel, avoiding the valve disc vibration and damage caused by sudden pressure change when the first valve disc and the second valve disc are opened simultaneously.

[0041] One side of the first valve disc 401 away from the first valve seat 108 abuts against a baffle 106. The baffle 106 is fixedly arranged on the inner wall of the valve body. The baffle 106 is in a semi-circular convex shape. The first valve disc 401 is slidably arranged between the valve seat 108 and the baffle 106. Through the arrangement of the baffle, the first valve disc can be kept fixed in the horizontal direction, preventing the first valve disc from vibrating or being damaged left and right under the action of the pressure difference.

[0042] A check valve is provided on the fifth connecting pipe 605, so that the gas can only flow from the pressure-relieving port 607 to the downstream air outlet 105, avoiding the gas at the downstream air outlet 105 from returning to the pressure-relieving port 607.

[0043] In the present invention, the high-pressure disc valve is used to transport high-pressure gas. There is high-pressure gas at the inlet of the high-pressure disc valve. When the valve is closed, since the gas at the outlet has been released or used, the gas pressure at the outlet is relatively low or close to the atmospheric pressure. When the valve is in the open state, the gas pressure at the inlet is slightly greater than the gas pressure at the outlet. By adjusting the working position of the rotary direction-changing valve, the high-pressure gas at the inlet is guided to enter or discharge from the cylinder assembly, thereby controlling the opening and closing of the high-pressure disc valve. In this way, there is no need to rely on an external power device to open and close the valve, eliminating the cumbersome power device and saving costs.

[0044] The working principle of the present invention is: Refer to the appendix Figure 5, when the control rotary directional valve 9 is in the first working position, the high-pressure gas at the high-pressure disc valve inlet 101 enters the fourth connecting pipe 604 through the upstream air inlet 104. Then, the gas successively passes through the pressurizing port 606, the second vertical flow channel 9104, and the first arc-shaped flow channel 9101. Then, the high-pressure gas passes through the first horizontal flow channel 9103, the first connecting pipe 601, and the first lower cavity connecting hole 2102 to enter the first lower cavity 2103. Another part of the high-pressure gas passes through the second horizontal flow channel 9105, the second connecting pipe 602, and the middle cavity connecting hole 2101 to communicate with the gas in the middle cavity 103. At the same time, the gas in the first upper cavity 2104 and the second upper cavity 2202 successively passes through the second upper cavity connecting hole 301, the third connecting pipe 603, the third horizontal flow channel 9204, the fourth vertical flow channel 9203, the pressure relief port 607, the fifth connecting pipe 605, and the downstream air outlet 105 for pressure relief. In this way, when the control rotary directional valve is in the first working position, the pressure in the first lower cavity 2103 increases, the pressures on both sides of the first valve disc 401 tend to be balanced, and the pressures in the first upper cavity 2104 and the second upper cavity 2202 decrease. Thus, driven by the high-pressure gas, the piston, valve stem, and valve disc move upward to overcome the elastic forces of the first spring and the second spring and the self-weights of the piston, valve stem, and valve disc, thereby opening the valve. When the valve is in the closed state, since the pressure upstream of the first valve disc is relatively high and the pressure downstream of the second valve disc is relatively low or close to atmospheric pressure, if the first valve disc and the second valve disc are opened simultaneously, due to the excessive pressure difference between the upstream and downstream, the first valve disc and the second valve disc will vibrate, which is likely to damage the valve. In the present invention, a pressure leakage channel is provided between the first cylinder and the second cylinder to open the first valve disc and the second valve disc in sequence, avoiding the vibration of the valve disc when the first valve disc and the second valve disc are opened simultaneously.

[0045] Refer to the appendix Figure 6, when the spool of the control rotary directional valve 9 rotates counterclockwise by 120°, and the rotary directional valve is in the second working position, the high-pressure gas at the high-pressure disc valve inlet 101 enters the fourth connecting pipe 604 through the upstream air inlet 104. Then, the gas successively passes through the pressurizing port 606, the first vertical flow channel 9102, and the first arc-shaped flow channel 9101. Then, the high-pressure gas passes through the first horizontal flow channel 9103, the second connecting pipe 602, and the middle cavity connecting hole 2101 to communicate with the gas in the middle cavity 103. Another part of the high-pressure gas passes through the second horizontal flow channel 9105, the third connecting pipe 603, and the second upper cavity connecting hole 301, so that the high-pressure gas enters the first upper cavity 2104 and the second upper cavity 2202. At the same time, the gas in the first lower cavity 2103 passes through the first lower cavity connecting hole 2102, the first connecting pipe 601, the third horizontal flow channel 9204, the second arc-shaped flow channel 9201, the third vertical flow channel 9202, the pressure relief port 607, the fifth connecting pipe 605, and the downstream air outlet 105 for pressure relief. In this way, when the control rotary directional valve is in the second working position, the pressure in the first lower cavity 2103 decreases, the pressures on both sides of the first valve disc 401 tend to be balanced, and the pressures in the first upper cavity 2104 and the second upper cavity 2202 increase. Thus, under the action of the high-pressure gas pressure, the elastic forces of the first spring and the second spring, and the self-weights of the piston, valve stem, and valve disc, the piston, valve stem, and valve disc move downward, and then the valve is closed. When the valve is in the open state, the pressure upstream of the first valve disc and the pressure downstream of the second valve disc are similar. Closing the first valve disc and the second valve disc simultaneously will not affect the valve.

[0046] Refer to the appendix Figure 7 , when the spool of the control rotary directional valve 9 rotates counterclockwise by 120° again, and the rotary directional valve is in the third working position, the pressurizing port 606 and the pressure relief port 607 are closed by the lower end face of the spool 9. At this time, the third horizontal flow channel 9204, the second connecting pipe 602, and the middle cavity connecting hole 2101 are in a closed state with the middle cavity 103, so that the middle cavity 103 maintains a relatively high pressure, improving the sealing pressure of the first valve disc and the second valve disc. The greater the air pressure, the higher the sealing performance between the valve disc and the valve seat. The first horizontal flow channel 9103 and the second horizontal flow channel 9105 are connected through the first arc-shaped flow channel 9101, and the first lower cavity connecting hole 2102 and the second upper cavity connecting hole 301 are connected. Then, the pressure in the entire inner cavity of the piston remains balanced and is in an overall closed state. In this way, by releasing a part of the pressure in the upper cavity of the cylinder to the lower cavity of the cylinder, it is beneficial to shorten the time for pressurizing the lower cavity of the piston and relieving the pressure in the upper cavity of the piston when the rotary directional valve is in the first working position when preparing to open the valve next time, and the valve can be opened faster.

[0047] Although the preferred embodiments of the present invention have been described, additional changes and modifications can be made to these embodiments by those skilled in the art once they learn of the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present invention.

[0048] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the intention of the present invention also includes these modifications and variations.

Claims

1. A rotary reversing valve, comprising a valve body (6) and a valve core (9), wherein the valve core (9) is rotatably arranged in the inner cavity of the valve body (6); The valve core (9) is provided with a first flow channel and a second flow channel. The first flow channel includes a horizontally arranged first arc-shaped flow channel (9101), a first transverse flow channel (9103), a second transverse flow channel (9105), and vertically arranged first vertical flow channel (9102) and second vertical flow channel (9104). One end of the first arc-shaped flow channel (9101) is connected to the first vertical flow channel (9102) and the first transverse flow channel (9103) at the same time, and the other end of the first arc-shaped flow channel (9101) is connected to the second vertical flow channel (9104) and the second transverse flow channel (9105) at the same time; The second flow channel includes a horizontally arranged second arc-shaped flow channel (9201), a third transverse flow channel (9204), and vertically arranged third vertical flow channel (9202) and fourth vertical flow channel (9203). One end of the second arc-shaped flow channel (9201) is connected to the third vertical flow channel (9202), and the other end of the second arc-shaped flow channel (9201) is connected to the fourth vertical flow channel (9203) and the third transverse flow channel (9204) at the same time; The radius of the first arc-shaped flow channel (9101) is greater than that of the second arc-shaped flow channel (9201), and the first transverse flow channel (9103), the second transverse flow channel (9105), and the third transverse flow channel (9204) are evenly distributed in the circumferential direction of the valve core (9); The bottom of the inner cavity of the valve body (6) is provided with a pressure port (606) and a pressure relief port (607). The first connecting pipe (601), the second connecting pipe (602), and the third connecting pipe (603) are evenly installed on the outer circumference of the valve body (6). The bottom of the valve body (6) is provided with a fourth connecting pipe (604) and a fifth connecting pipe (605). The pressure port (606) and the pressure relief port (607) are respectively connected to the fourth connecting pipe (604) and the fifth connecting pipe (605); The rotary reversing valve has three working positions. When the rotary reversing valve is in the first working position, the first transverse flow channel (9103), the second transverse flow channel (9105), and the third transverse flow channel (9204) are respectively connected to the first connecting pipe (601), the second connecting pipe (602), and the third connecting pipe (603), the second vertical flow channel (9104) is connected to the pressure port (606), and the fourth vertical flow channel (9203) is connected to the pressure relief port (607); When the rotary reversing valve is in the second working position, the first transverse flow channel (9103), the second transverse flow channel (9105), and the third transverse flow channel (9204) are respectively connected to the second connecting pipe (602), the third connecting pipe (603), and the first connecting pipe (601), the first vertical flow channel (9102) is connected to the pressure port (606), and the third vertical flow channel (9202) is connected to the pressure relief port (607); When the rotary reversing valve is in the third working position, the first transverse flow channel (9103), the second transverse flow channel (9105), and the third transverse flow channel (9204) are respectively communicated with the third connecting pipe (603), the first connecting pipe (601), and the second connecting pipe (602), and the pressurizing port (606) and the pressure relief port (607) are closed by the lower end surface of the valve core (9).

2. A rotary reversing valve according to claim 1, wherein, it further includes a valve cover (7), and the valve cover (7) is fixedly provided at the top of the valve body (6).

3. A rotary reversing valve according to claim 1, wherein, it further includes a valve rod (8), the top of the valve core (9) is fixedly connected to the valve rod (8), and the valve rod (8) is connected to a driving device.

4. A rotary reversing valve according to claim 3, wherein, the driving device is a motor or a handwheel.

5. A high-pressure disc valve, wherein, it includes the rotary reversing valve according to any one of claims 1-4, and further includes: a housing (1), a flow passage is provided inside the housing (1), an inlet (101) is provided at one end of the flow passage, an outlet (102) is provided at the other end of the flow passage, the middle part of the flow passage is a middle cavity (103), an installation sleeve (107) is integrally formed on the upper part of the housing (1), the middle cavity (103) extends upward into the installation sleeve (107), and a first valve seat (108) and a second valve seat (109) are respectively provided on the housing (1) on both sides of the middle cavity (103); a cylinder assembly (2), the cylinder assembly (2) is fixedly installed on the top of the installation sleeve (107), a cylinder head (3) is hermetically installed on the top of the cylinder assembly (2), the cylinder assembly (2) includes a first cylinder and a second cylinder, a first piston (403) is slidably provided in the first cylinder, a second piston (503) is slidably provided in the second cylinder, the first piston (403) divides the inner cavity of the first cylinder into a first lower cavity (2103) and a first upper cavity (2104), the second piston (503) divides the inner cavity of the second cylinder into a second lower cavity (2201) and a second upper cavity (2202), the lower end of the first piston (403) is connected to a first valve disc (401) through a first valve rod (402), the second piston (503) is connected to a second valve disc (501) through a second valve rod (502), the first valve disc (401) can cooperate with the first valve seat (108) to block the passage facing the inlet (101), and the second valve disc (501) can cooperate with the second valve seat (109) to block the passage facing the outlet (102); On one side of the housing (1) close to the inlet (101), there is an upstream air inlet (104) connected to the fourth connecting pipe (604). On one side of the housing (1) close to the outlet (102), there is a downstream air outlet (105) connected to the fifth connecting pipe (605). On the lower side wall of the cylinder assembly (2), there is a middle cavity connecting hole (2101) communicating with the middle cavity (103). On the lower side wall of the cylinder assembly (2), there is also a first lower cavity connecting hole (2102) connected to the first lower cavity (2103) of the first cylinder. At the top of the cylinder assembly (2), there is a second upper cavity connecting hole (301) communicating with the second upper cavity (2202). The first lower cavity connecting hole (2102), the middle cavity connecting hole (2101), and the second upper cavity connecting hole (301) are respectively connected to the first connecting pipe (601), the second connecting pipe (602), and the third connecting pipe (603). There is a first pressure leakage channel (2301) and a second pressure leakage channel (2302) between the inner cavities of the first cylinder and the second cylinder. The first pressure leakage channel (2301) is used to connect the first lower cavity (2103) and the second lower cavity (2201), and the second pressure leakage channel (2302) is used for the first upper cavity (2104) and the second upper cavity (2202).

6. A high-pressure disc valve according to claim 5, characterized in that, There is a first spring between the first piston (403) and the cylinder head (3), and a second spring between the second piston (503) and the cylinder head (3).

7. A high-pressure disc valve according to claim 5, characterized in that, When the rotary reversing valve is in the first working position, the first lower cavity connecting hole (2102) and the middle cavity connecting hole (2101) are connected to the upstream air inlet (104), and the second upper cavity connecting hole (301) is connected to the downstream air outlet (105). When the rotary reversing valve is in the second working position, the middle cavity connecting hole (2101) and the second upper cavity connecting hole (301) are connected to the upstream air inlet (104), and the first lower cavity connecting hole (2102) is connected to the downstream air outlet (105). When the rotary reversing valve is in the third working position, the pressurizing port (606) and the pressure relief port (607) are both closed.

8. A high-pressure disc valve according to claim 5, characterized in that, When the first piston (403) moves to the highest point, the first pressure leakage channel (2301) connects the first lower cavity (2103) and the second lower cavity (2201).

9. A high-pressure disc valve according to claim 5, characterized in that, On the side of the first valve disc (401) away from the first valve seat (108), there is a baffle (106) in contact. The baffle (106) is fixedly arranged on the inner wall of the valve body. The baffle (106) is in the shape of a semi-circular protrusion. The first valve disc (401) is slidably arranged between the valve seat (108) and the baffle (106).

10. A high-pressure disc valve according to claim 5, characterized in that, There is a check valve on the fifth connecting pipe (605) so that the gas can only flow from the pressure relief port (607) to the downstream air outlet (105).

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