Large-flow reversing valve

Abstract

The invention belongs to the technical field of valves, and discloses a high-flow reversing valve. Comprising a valve body, a valve element is slidably connected into the valve body, a first reset spring is arranged between the valve element and the valve body, a sliding piston rod is slidably connected into the valve body, and symmetrically-distributed inner sliding columns are slidably connected to the sliding piston rod in a penetrating mode; the end, away from the inner sliding column, of the sliding piston rod is slidably connected with symmetrically-distributed outer sliding columns in a penetrating mode, and the lower side of the inner sliding column is fixedly connected with a wedge-shaped connecting crank. Through cooperation of structures such as the valve element and the wedge-shaped extrusion block, the valve element drives the limiting sliding block to slide, then the wedge-shaped extrusion block is driven to slide, then the wedge-shaped pressurization block slides downwards through the wedge-shaped fixed sliding way, the sliding piston rod slides downwards, and then liquid flows into the pressure dividing channel.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, in particular to a large-flow reversing valve. Background Art

[0002] A high-flow reversing valve is a reversing valve specially designed to handle high-flow liquids or gases. A high-flow reversing valve can handle large amounts of liquids or gases and is usually used in systems that require rapid transmission or processing of large volumes of fluids. In order to meet high-flow working requirements, a high-flow reversing valve needs to have good stability and reliability to ensure normal operation under high pressure and high flow rate conditions.

[0003] During the reversing process of a large-flow reversing valve, the area of ​​the outlet channel increases from small to large. When the area of ​​the outlet channel is small, the large-flow liquid can easily cause the reversing valve to vibrate. This high-frequency vibration can easily damage the valve core and valve body, reducing the service life of the reversing valve. Summary of the invention

[0004] In order to solve the problem that the large flow reversing valve mentioned in the above background technology is prone to vibration during the reversing process, the present invention provides a large flow reversing valve.

[0005] To achieve the above object, the present invention provides the following technical solution: a large flow reversing valve, comprising a valve body, a valve core is slidably connected in the valve body, a first return spring is arranged between the valve core and the valve body, and a sliding piston rod is slidably connected in the valve body;

[0006] Among them, the sliding piston rod is slidably connected with a symmetrically distributed inner sliding column, the end of the sliding piston rod away from the inner sliding column is slidably connected with a symmetrically distributed outer sliding column, the lower side of the inner sliding column is fixedly connected with a wedge-shaped connecting crank, the lower side of the sliding piston rod is fixedly connected with a symmetrically distributed vertical limiting slide, the vertical limiting slide is slidably connected with a wedge-shaped control slide rod, a fourth return spring is arranged between the wedge-shaped control slide rod and the vertical limiting slide, and the lower side of the sliding piston rod away from the vertical limiting slide is fixedly connected with a symmetrically distributed The cam is provided with a plurality of return springs, and the plurality of return springs are provided between the plurality of return springs and the plurality of return springs.

[0007] Preferably, a limiting sliding plate is slidably connected inside the valve core, a symmetrically distributed second return spring is arranged between the limiting sliding plate and the valve core, a connecting sliding shaft is slidably connected inside the limiting sliding plate, and a wedge-shaped extrusion block is fixedly connected to the lower side of the connecting sliding shaft.

[0008] Preferably, the wedge-shaped extrusion block is fixedly connected with a symmetrically distributed connecting slider, and the valve body has a symmetrically distributed wedge-shaped fixed slideway fixedly connected to the sliding piston rod. The wedge-shaped extrusion block is wedge-shapedly matched with the wedge-shaped fixed slideway, and a slideway for the connecting slider to slide is provided in the wedge-shaped fixed slideway.

[0009] Preferably, the sliding piston rod is slidably connected with a fixed sliding ring, the fixed sliding ring is fixedly connected to the valve body, and a third return spring is arranged between the fixed sliding ring and the sliding piston rod.

[0010] Preferably, the fixed slip ring is fixedly connected with a symmetrically distributed driven air chamber, a driven connecting piston is slidably connected in the driven air chamber, the driven connecting piston is slidably connected to the fixed slip ring, an air chamber connecting frame is fixedly connected to the driven air chamber, a transmission air chamber is fixedly connected in the air chamber connecting frame, a transmission connecting piston is slidably connected to the transmission air chamber, the transmission connecting piston is fixedly connected to a wedge-shaped connecting crank, a seventh return spring is fixedly connected to the lower side of the wedge-shaped connecting crank, and the seventh return spring is fixedly connected to the sliding piston rod.

[0011] Preferably, the driven air chamber is communicated with the transmission air chamber.

[0012] Preferably, a pressure dividing baffle is fixedly connected to the lower side of the driven connecting piston, and the pressure dividing baffle is slidably connected to the valve body.

[0013] Preferably, two outlet channels are provided in the valve body, a pressure dividing channel is provided in the valve body between the two outlet channels, connecting channels are provided in the pressure dividing channel and the outlet channel in the valve body respectively, and the pressure dividing baffles respectively control the switching of the connecting channels.

[0014] Preferably, a pressure dividing piston is slidably connected in the valve body, a pressure dividing chamber is fixedly connected at the lower side of the valve body, and a pressure dividing spring is arranged between the pressure dividing chamber and the pressure dividing piston.

[0015] Preferably, the elastic force of the pressure dividing spring is only less than the pressure caused when both outlet channels of the valve body are closed.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention cooperates with structures such as a valve core and a wedge-shaped extrusion block, and the valve core drives the sliding of the limit slide, thereby driving the sliding of the wedge-shaped extrusion block, and then the wedge-shaped pressure block slides downward through the wedge-shaped fixed slideway, and then the sliding piston rod slides downward, so that the liquid flows into the pressure-dividing channel;

[0018] The present invention cooperates with structures such as a wedge-shaped extrusion block and a pressure-dividing baffle plate, and as the wedge-shaped extrusion block slides, the inner sliding column slides downward, and then the pressure-dividing baffle plate slides downward through the wedge-shaped connecting crank, so that the liquid in the pressure-dividing channel flows into the outlet channel;

[0019] The present invention cooperates with structures such as an inner sliding column and a wedge-shaped control sliding rod, so that the inner sliding column is driven by the wedge-shaped extrusion block to slide downward, and then the wedge-shaped transmission block is driven downward to slide the wedge-shaped control sliding rod, so that the wedge-shaped control sliding rod is reset, and the wedge-shaped connecting crank is reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a half-section schematic diagram of the structure of the present invention;

[0022] Figure 3 A half-section schematic diagram of the connection between the valve core and the limit sliding plate of the present invention;

[0023] Figure 4 An exploded view of the movement of the sliding connecting rod of the present invention;

[0024] Figure 5 For the present invention Figure 4 The enlarged view of point A in the middle;

[0025] Figure 6 A half-section schematic diagram of the pressure relief connection structure of the present invention;

[0026] Figure 7 It is an exploded view of the pressure relief connection structure of the present invention;

[0027] Figure 8 It is a half-section schematic diagram of the pressure-dividing chamber of the present invention.

[0028] In the figure: 100, valve body; 101, valve core; 102, first return spring; 200, limit sliding plate; 201, second return spring; 202, connecting sliding shaft; 203, wedge-shaped fixed slideway; 204, connecting slider; 205, wedge-shaped extrusion block; 300, fixed sliding ring; 301, sliding piston rod; 302, third return spring; 400, inner sliding column; 401, outer sliding column; 402, driven air chamber; 403, driven connecting piston; 404, pressure dividing baffle; 405, air chamber connecting frame ; 406, transmission air chamber; 407, transmission connecting piston; 408, wedge-shaped connecting crank; 409, seventh return spring; 500, wedge-shaped control slide; 501, vertical limit slide; 502, fourth return spring; 503, horizontal limit slide; 504, fifth return spring; 505, wedge-shaped control slide; 506, wedge-shaped follower block; 507, fixed sliding ring; 508, sixth return spring; 509, wedge-shaped transmission block; 600, pressure-dividing chamber; 601, pressure-dividing piston; 602, pressure-dividing spring. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 8 As shown, the present invention provides a large flow reversing valve, including a valve body 100, a valve core 101 is slidably connected in the valve body 100, a first return spring 102 is arranged between the valve core 101 and the valve body 100, and a sliding piston rod 301 is slidably connected in the valve body 100;

[0031] Among them, the sliding piston rod 301 is slidably connected with a symmetrically distributed inner sliding column 400, the end of the sliding piston rod 301 away from the inner sliding column 400 is slidably connected with a symmetrically distributed outer sliding column 401, the lower side of the inner sliding column 400 is fixedly connected with a wedge-shaped connecting crank 408, the lower side of the sliding piston rod 301 is fixedly connected with a symmetrically distributed vertical limiting slide 501, the vertical limiting slide 501 is slidably connected with a wedge-shaped control slide bar 500, a fourth reset spring 502 is arranged between the wedge-shaped control slide bar 500 and the vertical limiting slide 501, and the lower side of the sliding piston rod 301 away from the vertical limiting slide 501 is fixedly connected with a symmetrically distributed horizontal limiting spring 506. Slide plate 503, a wedge-shaped control slide bar 505 is slidably connected through the horizontal limit slide plate 503, a fifth return spring 504 is arranged between the wedge-shaped control slide bar 505 and the horizontal limit slide plate 503, a wedge-shaped follower block 506 is fixedly connected to the end of the wedge-shaped control slide bar 505 away from the wedge-shaped control slide bar 500, the wedge-shaped control slide bar 505 is wedge-matched with the wedge-shaped control slide bar 500, a wedge-shaped transmission block 509 is fixedly connected to the outer sliding column 401, the wedge transmission block 509 is wedge-matched with the wedge-shaped follower block 506, a fixed sliding ring 507 is slidably connected through the outer sliding column 401, and a sixth return spring 508 is arranged between the fixed sliding ring 507 and the outer sliding column 401.

[0032] A limiting sliding plate 200 is slidingly connected inside the valve core 101, a symmetrically distributed second return spring 201 is arranged between the limiting sliding plate 200 and the valve core 101, a connecting sliding shaft 202 is slidingly connected inside the limiting sliding plate 202, and a wedge-shaped extrusion block 205 is fixedly connected to the lower side of the connecting sliding shaft 202.

[0033] A symmetrically distributed connecting slider 204 is fixedly connected to the wedge-shaped extrusion block 205, and a symmetrically distributed wedge-shaped fixed slideway 203 is fixedly connected to the sliding piston rod 301 in the valve body 100. The wedge-shaped extrusion block 205 is wedge-matched with the wedge-shaped fixed slideway 203, and a slideway for the connecting slider 204 to slide is opened in the wedge-shaped fixed slideway 203.

[0034] The sliding piston rod 301 passes through and is slidably connected with a fixed slip ring 300 . The fixed slip ring 300 is fixedly connected to the valve body 100 . A third return spring 302 is provided between the fixed slip ring 300 and the sliding piston rod 301 .

[0035] A symmetrically distributed driven air chamber 402 is fixedly connected to the fixed slip ring 300, a driven connecting piston 403 is slidably connected in the driven air chamber 402, the driven connecting piston 403 is slidably connected to the fixed slip ring 300, an air chamber connecting frame 405 is fixedly connected to the driven air chamber 402, a transmission air chamber 406 is fixedly connected in the air chamber connecting frame 405, a transmission connecting piston 407 is slidably connected to the transmission air chamber 406, the transmission connecting piston 407 is fixedly connected to the wedge-shaped connecting crank 408, a seventh return spring 409 is fixedly connected to the lower side of the wedge-shaped connecting crank 408, and the seventh return spring 409 is fixedly connected to the sliding piston rod 301.

[0036] The driven air chamber 402 is connected to the transmission air chamber 406 .

[0037] A pressure dividing baffle 404 is fixedly connected to the lower side of the driven connecting piston 403 , and the pressure dividing baffle 404 is slidably connected to the valve body 100 .

[0038] Two outlet channels are opened in the valve body 100 , and a pressure dividing channel is opened in the valve body 100 between the two outlet channels. The pressure dividing channel and the outlet channel in the valve body 100 are respectively opened with connecting channels, and the pressure dividing baffle 404 controls the opening and closing of the connecting channels respectively.

[0039] The above scheme is adopted: when the reversing valve is in the process of reversing, in order to avoid the vibration of the outlet channel that may be caused by the large flow during the reversing process, the valve core 101 slides, and under the elastic force of the symmetrically distributed second return spring 201, the limit sliding plate 200 slides with the sliding of the valve core 101, thereby driving the connecting sliding shaft 202 and the wedge-shaped extrusion block 205 to slide in the wedge-shaped fixed slide 203, and then through the wedge-shaped fixed slide 203 and the wedge-shaped extrusion block 205 The wedge-shaped cooperation makes the wedge-shaped extrusion block 205 slide downward during the sliding process, and then drives the sliding piston rod 301 to slide downward, and then compresses the third return spring 302, and then releases the closed state formed between the sliding piston rod 301 and the valve body 100, so that the liquid flowing into the inlet channel of the valve body 100 flows into the pressure-dividing channel.

[0040] As the wedge-shaped extrusion block 205 slides on the sliding piston rod 301, it pushes the inner sliding column 400 to slide downward, and then drives the transmission connection piston 407 to slide downward through the wedge-shaped connection crank 408, and then the driven connection piston 403 slides downward through the connection between the transmission air chamber 406 and the driven air chamber 402, and then the pressure dividing baffle 404 slides downward, and then the channel connecting the pressure dividing channel and the outlet channel is opened, and then the liquid flows into the outlet channel through the pressure dividing channel, thereby reducing the holes in the outlet channel that gradually increase as the valve core 101 slides directly between the valve core 101 and the valve body 100, thereby reducing the vibration that may be caused by large flow.

[0041] As the wedge-shaped extrusion block 205 continues to slide until it contacts the valve body 100, the wedge-shaped extrusion block 205 slides to the end point, and the valve core 101 continues to slide, so that the second return spring 201 is stretched or compressed. When the wedge-shaped extrusion block 205 slides to the end point, the hole between the valve core 101 and the valve body 100 is enlarged, which can avoid vibration caused by large flow. At this time, the pressure dividing baffle 404 needs to be slid upward to close the connecting channel.

[0042] When the wedge-shaped extrusion block 205 slides to the end point, the outer sliding column 401 is first pushed downward, thereby driving the wedge-shaped transmission block 509 to slide downward along the fixed sliding ring 507, thereby driving the wedge-shaped driven block 506 to slide along the direction of the horizontal limit slide plate 503, and then driving the wedge-shaped control slide bar 505 to slide in the same direction. During the downward sliding process of the inner sliding column 400, due to the wedge-shaped cooperation between the wedge-shaped connecting crank 408 and the wedge-shaped control slide bar 500, the wedge-shaped control slide bar 500 clamps the wedge-shaped connecting crank 408, so that the connection passage The channel continues to open. With the sliding of the wedge-shaped control slide bar 505, the wedge-shaped control slide bar 505 cooperates with the wedge shape of the wedge-shaped control slide bar 500, so that the wedge-shaped control slide bar 500 slides in the opposite direction along the vertical limit slide plate 501, and then the elastic force of the seventh return spring 409 returns the inner sliding column 400, and then the pressure-dividing baffle 404 closes the connecting channel. When the wedge-shaped extrusion block 205 slides over the outer sliding column 401, the sixth return spring 508 returns the outer sliding column 401 upward, and then the wedge-shaped control slide bar 505 returns.

[0043] like Figure 8 As shown, a pressure dividing piston 601 is slidably connected inside the valve body 100 , a pressure dividing chamber 600 is fixedly connected to the lower side of the valve body 100 , and a pressure dividing spring 602 is provided between the pressure dividing chamber 600 and the pressure dividing piston 601 .

[0044] The elastic force of the pressure dividing spring 602 is only slightly smaller than the pressure caused when both outlet channels of the valve body 100 are closed.

[0045] The above scheme is adopted: when the reversing valve is in the process of reversing, in order to avoid the internal pressure increasing when both outlet channels are closed, when one outlet channel is opened, the channel opening increases from small to large, and in order to avoid the vibration of the channel opening due to the large flow in this process, thereby causing damage, when the two outlet channels are closed, the pressure-dividing piston 601 slides downward under pressure, and the pressure-dividing spring 602 is compressed. When the outlet channel is gradually opened, the elastic force of the pressure-dividing spring 602 pushes the pressure-dividing piston 601 to slide upward as the outlet channel opens, thereby reducing the vibration that may be caused by the large flow and increasing the service life of the device.

[0046] The working principle and use process of the present invention:

[0047] When the reversing valve is in the process of reversing, in order to avoid vibration of the outlet channel caused by large flow during the reversing process, the valve core 101 slides and the limiting sliding plate 200 slides with the sliding of the valve core 101 under the elastic force of the symmetrically distributed second return spring 201, thereby driving the connecting sliding shaft 202 and the wedge-shaped extrusion block 205 to slide in the wedge-shaped fixed slide 203, and then the wedge-shaped fixed slide 203 cooperates with the wedge shape of the wedge-shaped extrusion block 205, so that the wedge-shaped extrusion block 205 slides downward during the sliding process, thereby driving the sliding piston rod 301 to slide downward, thereby compressing the third return spring 302, thereby releasing the closed state between the sliding piston rod 301 and the valve body 100, and thereby allowing the liquid flowing into the inlet channel of the valve body 100 to flow into the pressure-dividing channel.

[0048] As the wedge-shaped extrusion block 205 slides on the sliding piston rod 301, it pushes the inner sliding column 400 to slide downward, and then drives the transmission connection piston 407 to slide downward through the wedge-shaped connection crank 408, and then the driven connection piston 403 slides downward through the connection between the transmission air chamber 406 and the driven air chamber 402, and then the pressure dividing baffle 404 slides downward, and then the channel connecting the pressure dividing channel and the outlet channel is opened, and then the liquid flows into the outlet channel through the pressure dividing channel, thereby reducing the holes in the outlet channel that gradually increase as the valve core 101 slides directly between the valve core 101 and the valve body 100, thereby reducing the vibration that may be caused by large flow.

[0049] As the wedge-shaped extrusion block 205 continues to slide until it contacts the valve body 100, the wedge-shaped extrusion block 205 slides to the end point, and the valve core 101 continues to slide, so that the second return spring 201 is stretched or compressed. When the wedge-shaped extrusion block 205 slides to the end point, the hole between the valve core 101 and the valve body 100 is enlarged, which can avoid vibration caused by large flow. At this time, the pressure dividing baffle 404 needs to be slid upward to close the connecting channel.

[0050] When the wedge-shaped extrusion block 205 slides to the end point, the outer sliding column 401 is first pushed downward, thereby driving the wedge-shaped transmission block 509 to slide downward along the fixed sliding ring 507, thereby driving the wedge-shaped driven block 506 to slide along the direction of the horizontal limit slide plate 503, and then driving the wedge-shaped control slide bar 505 to slide in the same direction. During the downward sliding process of the inner sliding column 400, due to the wedge-shaped cooperation between the wedge-shaped connecting crank 408 and the wedge-shaped control slide bar 500, the wedge-shaped control slide bar 500 clamps the wedge-shaped connecting crank 408, so that the connection passage The channel continues to open. With the sliding of the wedge-shaped control slide bar 505, the wedge-shaped control slide bar 505 cooperates with the wedge shape of the wedge-shaped control slide bar 500, so that the wedge-shaped control slide bar 500 slides in the opposite direction along the vertical limit slide plate 501, and then the elastic force of the seventh return spring 409 returns the inner sliding column 400, and then the pressure-dividing baffle 404 closes the connecting channel. When the wedge-shaped extrusion block 205 slides over the outer sliding column 401, the sixth return spring 508 returns the outer sliding column 401 upward, and then the wedge-shaped control slide bar 505 returns.

[0051] When the reversing valve is in the process of reversing, in order to avoid the internal pressure increasing when both outlet channels are closed, when one outlet channel is opened, the channel opening increases from small to large, and to avoid the vibration of the channel opening due to large flow in this process, thereby causing damage, when the two outlet channels are closed, the pressure-dividing piston 601 slides downward under pressure, and the pressure-dividing spring 602 is compressed. When the outlet channel is gradually opened, the elastic force of the pressure-dividing spring 602 pushes the pressure-dividing piston 601 to slide upward as the outlet channel opens, thereby reducing the vibration that may be caused by large flow and increasing the service life of the device.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large flow reversing valve, comprising a valve body (100), characterized in that: A valve core (101) is slidably connected inside the valve body (100), a first return spring (102) is provided between the valve core (101) and the valve body (100), and a sliding piston rod (301) is slidably connected inside the valve body (100); The sliding piston rod (301) is slidably connected with symmetrically distributed inner sliding columns (400), the end of the sliding piston rod (301) away from the inner sliding columns (400) is slidably connected with symmetrically distributed outer sliding columns (401), the lower side of the inner sliding columns (400) is fixedly connected with a wedge-shaped connecting crank (408), the lower side of the sliding piston rod (301) is fixedly connected with symmetrically distributed vertical limiting slides (501), the vertical limiting slide (501) is slidably connected with a wedge-shaped control slide bar (500), a fourth reset spring (502) is arranged between the wedge-shaped control slide bar (500) and the vertical limiting slide (501), the lower side of the sliding piston rod (301) away from the vertical limiting slide (501) is fixedly connected with symmetrically distributed horizontal limiting slides (501), and the lower side of the sliding piston rod (301) is fixedly connected with a symmetrically distributed horizontal limiting slide (501). 3), a wedge-shaped control slide bar (505) is slidably connected to the horizontal limit slide plate (503), a fifth return spring (504) is arranged between the wedge-shaped control slide bar (505) and the horizontal limit slide plate (503), a wedge-shaped follower block (506) is fixedly connected to the end of the wedge-shaped control slide bar (505) away from the wedge-shaped control slide bar (500), the wedge-shaped control slide bar (505) and the wedge-shaped control slide bar (500) are wedge-matched, a wedge-shaped transmission block (509) is fixedly connected to the outer sliding column (401), the wedge-shaped transmission block (509) and the wedge-shaped follower block (506) are wedge-matched, a fixed sliding ring (507) is slidably connected to the outer sliding column (401), and a sixth return spring (508) is arranged between the fixed sliding ring (507) and the outer sliding column (401).

2. The large flow reversing valve according to claim 1, characterized in that: The valve core (101) is slidably connected to a limit sliding plate (200), a symmetrically distributed second return spring (201) is provided between the limit sliding plate (200) and the valve core (101), the limit sliding plate (200) is slidably connected to a connecting sliding shaft (202), and a wedge-shaped extrusion block (205) is fixedly connected to the lower side of the connecting sliding shaft (202).

3. The large flow reversing valve according to claim 2, characterized in that: The wedge-shaped extrusion block (205) is fixedly connected to symmetrically distributed connecting sliders (204), and the valve body (100) is fixedly connected to the sliding piston rod (301) to symmetrically distributed wedge-shaped fixed slideways (203). The wedge-shaped extrusion block (205) and the wedge-shaped fixed slideway (203) are wedge-matched, and a slideway for the connecting slider (204) to slide is provided in the wedge-shaped fixed slideway (203).

4. The large flow reversing valve according to claim 3 is characterized in that: The sliding piston rod (301) is slidably connected to a fixed sliding ring (300), the fixed sliding ring (300) is fixedly connected to the valve body (100), and a third return spring (302) is arranged between the fixed sliding ring (300) and the sliding piston rod (301).

5. The large flow reversing valve according to claim 4, characterized in that: The fixed sliding ring (300) is fixedly connected with a symmetrically distributed driven air chamber (402), a driven connecting piston (403) is slidably connected in the driven air chamber (402), the driven connecting piston (403) is slidably connected to the fixed sliding ring (300), an air chamber connecting frame (405) is fixedly connected to the driven air chamber (402), a transmission air chamber (406) is fixedly connected in the air chamber connecting frame (405), a transmission connecting piston (407) is slidably connected in the transmission air chamber (406), the transmission connecting piston (407) is fixedly connected to a wedge-shaped connecting crank (408), a seventh return spring (409) is fixedly connected to the lower side of the wedge-shaped connecting crank (408), and the seventh return spring (409) is fixedly connected to the sliding piston rod (301).

6. The large flow reversing valve according to claim 5, characterized in that: The driven air chamber (402) is in communication with the transmission air chamber (406).

7. The large flow reversing valve according to claim 5, characterized in that: A pressure dividing baffle (404) is fixedly connected to the lower side of the driven connecting piston (403), and the pressure dividing baffle (404) is slidably connected to the valve body (100).

8. The large flow reversing valve according to claim 7, characterized in that: The valve body (100) is provided with two outlet channels, the valve body (100) is provided with a pressure dividing channel between the two outlet channels, the pressure dividing channel and the outlet channel in the valve body (100) are respectively provided with connecting channels, and the pressure dividing baffle (404) respectively controls the opening and closing of the connecting channels.

9. The large flow reversing valve according to claim 8, characterized in that: A pressure dividing piston (601) is slidably connected inside the valve body (100), a pressure dividing chamber (600) is fixedly connected to the lower side of the valve body (100), and a pressure dividing spring (602) is provided between the pressure dividing chamber (600) and the pressure dividing piston (601).

10. The large flow reversing valve according to claim 9, characterized in that: The elastic force of the pressure dividing spring (602) is only slightly smaller than the pressure caused when both outlet channels of the valve body (100) are closed.

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