Rotary gate valve

Abstract

The invention belongs to the technical field of valves, and discloses a rotary gate valve. The rotary gate valve comprises a gate valve body and a driving mechanism, the gate valve body comprises a valve body, a valve cover, a valve rod and a valve seat cylinder, when the gate valve body is closed, the valve seat cylinder is located at a first working position, and when the gate valve body is opened, the valve seat cylinder rotates to a second working position from the first working position; the driving mechanism can drive the valve rod to rotate. According to the rotary gate valve, the valve rod can be driven to rotate through an external driving device, so that the valve seat cylinder is rapidly switched between the first working position and the second working position, and rapid opening and closing of the rotary gate valve are achieved; the valve rod can be driven to rotate through the driving mechanism, and the valve seat cylinder can be switched between the first working position and the second working position, so that the driving modes for opening and closing the rotary gate valve are increased, and normal work of the rotary gate valve is ensured under the conditions that a driving device is not arranged and the driving device does not have working conditions; and the working reliability of the rotary gate valve is improved.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a rotary gate valve. Background Art

[0002] Most of the existing gate valves are of a rotary lifting rod structure, that is, the gate plate is driven to move in a straight line by rotating the hand wheel. When opening and closing the gate valve, it needs to rotate multiple circles, and the opening and closing is relatively slow. Therefore, the invention with the existing publication number CN116221439A discloses a rotary gate valve, including a valve body, a valve cover, a valve stem arranged through the valve cover, and a valve seat assembly arranged at the lower end of the valve stem. A flow channel is opened on the valve body, and the valve stem is used to drive the valve seat assembly to rotate. The valve seat assembly includes a support seat, a channel and a groove opened on the support seat, and a valve seat arranged in the groove. The support seat can be driven to rotate by the rotation of the valve stem, so that the channel on the support seat and the flow channel on the valve body are mutually connected or staggered to realize the opening and closing of the valve.

[0003] The above-mentioned rotary gate valve only needs to rotate 90° to open and close the gate valve, but the rotation of the valve stem needs to be driven by an external driving device, resulting in a single driving mode of the rotary gate valve. It cannot work normally when it is not equipped with a driving device or the driving device does not meet the operating conditions, affecting the stability of the rotary gate valve. Summary of the invention

[0004] The object of the present invention is to provide a rotary gate valve which can realize opening and closing of the gate valve in a variety of ways, so as to cope with the situation that there is no driving device or the driving device does not have the working conditions, thereby improving the working stability of the rotary gate valve.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A rotary gate valve, the rotary gate valve comprises a gate valve body, the gate valve body comprises a valve body, a valve cover, a valve stem and a valve seat cylinder, the valve cover is arranged on the valve body, a cavity is provided between the valve body and the valve cover, the valve seat cylinder is arranged inside the cavity, the valve stem passes through the valve cover and is connected to the valve seat cylinder; when the gate valve body is closed, the valve seat cylinder is in a first working position, when the gate valve body is opened, the valve seat cylinder rotates from the first working position to a second working position, the rotary gate valve also comprises a driving mechanism, the driving mechanism comprises:

[0007] A driving cylinder body, wherein the driving cylinder body is arranged on a side of the valve cover away from the valve body, and the valve stem extends out of the driving cylinder body;

[0008] a sliding member, the sliding member being slidably disposed inside the driving cylinder along an axial direction parallel to the valve stem, the sliding member being capable of sliding from a third working position to a fourth working position; and

[0009] A transmission assembly is connected between the sliding member and the valve stem, and the transmission assembly can drive the valve seat tube to switch between the first working position and the second working position when the sliding member slides between the third working position and the fourth working position.

[0010] Preferably, the interior of the driving cylinder is provided with a first sealing cavity and a second sealing cavity along its axial direction;

[0011] The sliding member comprises:

[0012] a first ring portion, wherein an outer ring of the first ring portion is slidably connected to an inner wall of the first sealing cavity, and the first ring portion and the first sealing cavity are sealed together; and

[0013] a second ring portion, wherein the outer diameter of the second ring portion is larger than or smaller than the outer diameter of the first ring portion, the outer ring of the second ring portion is slidably connected to the inner wall of the second sealing cavity, and the second ring portion and the second sealing cavity are sealed;

[0014] The outer ring of the sliding member and the inner wall of the driving cylinder body cooperate to form a driving chamber with variable volume. The driving cylinder body is provided with a medium channel connected to the driving chamber. When the medium is filled into or extracted from the driving chamber, the sliding member can be driven to slide.

[0015] Preferably, the sliding member further comprises:

[0016] A mounting seat is located at an end of the first ring portion away from the second ring portion, and a first elastic member is provided between the mounting seat and the drive cylinder body, and the first elastic member can reset the sliding member in the fourth working position to the third working position.

[0017] Preferably, the first elastic member is a return spring, a bearing is provided between the mounting seat and the return spring, and one end of the return spring close to the mounting seat can rotate relative to the mounting seat.

[0018] Preferably, one of the second ring portion and the driving cylinder body is provided with a guide groove along a sliding direction parallel to the first ring portion, and the other of the second ring portion and the driving cylinder body is connected with a guide member, which is plug-fitted with the guide groove and can slide relative to the guide groove along the length direction of the guide groove.

[0019] Preferably, the transmission assembly comprises:

[0020] a transmission ring, the transmission ring being coaxially arranged with the valve stem and having a spiral groove; and

[0021] A transmission member is inserted into the interior of the spiral groove; one of the transmission ring and the transmission member is connected to the valve stem, and the other is connected to the sliding member.

[0022] Preferably, a plurality of the spiral grooves are provided along the circumference of the transmission ring, and one transmission member is provided corresponding to each of the spiral grooves.

[0023] Preferably, a convex ring is disposed on the outside of the driving cylinder, and the rotary gate valve further comprises:

[0024] The outer shell is located at a side of the medium channel away from the valve body, the outer shell is covered on the outside of the driving cylinder body and is sealed with the outer ring of the convex ring, and the valve stem extends out of the outer shell.

[0025] Preferably, a driving panel is provided on a side of the housing away from the valve body, a driving head is rotatably provided on the driving panel, and the driving head is coaxially connected to the valve stem.

[0026] Preferably, a second elastic member is provided between the valve stem and the valve cover, and the second elastic member can apply an elastic force to the valve stem away from the valve cover.

[0027] Beneficial effects of the present invention:

[0028] The rotary gate valve of the present invention can not only directly drive the valve stem to rotate through an external driving device to enable the valve seat cylinder to quickly switch between the first working position and the second working position; it can also utilize a sliding slide to drive the valve stem to rotate synchronously through a transmission assembly, so that the valve seat cylinder can also switch between the first working position and the second working position, thereby increasing the driving mode for opening and closing the rotary gate valve, so as to ensure the normal operation of the rotary gate valve even when the driving device is not equipped or the driving device does not have the operating conditions, thereby improving the reliability of the rotary gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a cross-sectional view of the rotary gate valve of the present invention along the radial direction of the valve stem;

[0030] Figure 2 yes Figure 1 One of the enlarged views of the part in the figure;

[0031] Figure 3 yes Figure 1 The second enlarged view of the part in the middle;

[0032] Figure 4 is a partial schematic diagram of the valve stem of the present invention;

[0033] Figure 5 It is a structural schematic diagram of the transmission ring of the present invention;

[0034] Figure 6 It is a top view of the rotary gate valve of the present invention.

[0035] In the figure:

[0036] 1. Valve body; 11. Flow channel; 2. Valve cover; 21. Cavity; 3. Valve stem; 31. Crimp ring; 311. Boss; 4. Valve seat cylinder; 42. Mounting groove; 43. Valve seat; 44. Sealing elastic member; 5. Drive cylinder; 51. First sealing cavity; 52. Second sealing cavity; 53. Connecting ring; 54. Guide member; 55. Medium channel; 56. Drive cavity; 57. Boss ring; 58. Press ring; 6. Sliding member; 61. First ring portion; 62. Second ring portion; 621, guide groove; 622, contact surface; 63, mounting seat; 631, thrust bearing; 7, transmission assembly; 71, transmission ring; 711, spiral groove; 712, groove; 72, transmission member; 8, outer shell; 81, ring shell; 82, end cover; 91, first elastic member; 92, second elastic member; 10, drive panel; 101, open mark; 102, close mark; 103, drive head; 1031, indicator arrow. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] Refer to the following Figures 1 to 6 The rotary gate valve provided by the present invention is described.

[0042] Reference Figure 1 and Figure 2 The rotary gate valve includes a gate valve body and a driving mechanism. The gate valve body includes a valve body 1, a valve cover 2, a valve stem 3 and a valve seat cylinder 4. A cavity 21 is provided between the valve body 1 and the valve cover 2. The valve body 1 is provided with a plurality of flow channels 11 connected to the cavity 21. The valve seat cylinder 4 is placed inside the cavity 21. One end of the valve stem 3 is connected to the valve seat cylinder 4. A channel is provided on the valve seat cylinder 4. The valve stem 3 can drive the valve seat cylinder 4 to rotate to a first working position that isolates the flow channel 11 from the cavity 21, and a second working position that connects the flow channel 11 to the cavity 21 through the channel. The driving mechanism can drive the valve stem 3 to rotate.

[0043] Specifically in this embodiment, the valve body 1 and the valve cover 2 in this embodiment are arranged in sequence from bottom to top, and a metal sealing ring is provided at the connection between the valve body 1 and the valve cover 2 to seal the connection between the valve body 1 and the valve cover 2. The following content describes the rotary gate valve in detail with respect to this orientation relationship. In some other embodiments, the rotary gate valve can also be arranged horizontally, or tilted at a certain angle, and the specific angle is not limited. In addition, the valve stem 3 in this embodiment adopts a multi-stage arrangement, that is, the valve stem 3 is formed by connecting a plurality of coaxially arranged rods, and the specific connection method is not limited. In some other embodiments, the valve stem 3 can also be arranged as a whole.

[0044] By way of example, in this embodiment, two flow channels 11 are provided at the bottom of the valve body 1, and the flow channels 11 are arranged in an L shape, and the two ends of the flow channels 11 are connected to the cavity 21 and the outside of the valve body 1 respectively. The valve seat tube 4 is arranged horizontally and cylindrically, and a channel (not shown in the figure) is provided on the valve seat tube 4 corresponding to each flow channel 11, that is, two channels are provided along the radial direction of the valve seat tube 4. In order to improve the blocking effect of the flow channel 11, two mounting grooves 42 are also provided at the bottom of the valve seat tube 4 along the radial direction of the valve seat tube 4. The mounting grooves 42 are stepped grooves with larger outer sides and smaller inner sides. The distribution direction of the two mounting grooves 42 is perpendicular to the distribution direction of the two channels. A valve seat 43 is provided inside each mounting groove 42, and a sealing elastic member 44 is abutted between the valve seat 43 and the groove bottom of the mounting groove 42. The sealing elastic member 44 in this embodiment is a spring.

[0045] Based on the above arrangement, when the valve seat tube 4 is in the first working position (refer to Figure 1 ), at this time, the rotary gate valve is in a closed state, and the two flow channels 11 are blocked respectively by the two valve seats 43, thereby reducing the possibility of leakage between the valve seats 43 and the flow channels 11. When the valve stem 3 is rotated by a tool or a driving member until the valve seat cylinder 4 rotates to the second working position, that is, the valve seat cylinder 4 rotates 90°, the rotary gate valve is in an open state, and the two flow channels 11 are connected to the cavity 21 through two channels.

[0046] It is worth noting that in some other embodiments, a gate valve body in which the direction of the flow channel 11 is perpendicular to the axis of the valve stem 3 and the valve plate is vertically arranged may also be adopted, that is, the specific form and specification of the gate valve body may be adaptively selected.

[0047] Reference Figure 2 and Figure 3 The driving mechanism includes a driving cylinder 5, a sliding member 6 and a transmission assembly 7. The driving cylinder 5 is vertically arranged. The sliding member 6 is slidably arranged inside the driving cylinder 5 along an axial direction parallel to the valve stem 3. The sliding member 6 can slide from the third working position to the fourth working position. The transmission assembly 7 is connected between the driving member and the valve stem 3. The transmission assembly 7 can enable the sliding member 6 to slide between the third working position and the fourth working position, thereby driving the valve seat tube 4 to switch between the first working position and the second working position.

[0048] Illustratively, a connecting ring 53 is connected to the bottom of the driving cylinder body 5 in this embodiment, and the connecting ring 53 is detachably connected to the valve cover 2 by screws. The interior of the driving cylinder body 5 is sequentially provided with a first sealing chamber 51 and a second sealing chamber 52 along its axial direction. The first sealing chamber 51 and the second sealing chamber 52 are sequentially arranged from bottom to top and are connected. A medium channel 55 connected to the junction of the first sealing chamber 51 and the second sealing chamber 52 is opened on the driving cylinder body 5.

[0049] Furthermore, the sliding member 6 includes a first ring portion 61, a second ring portion 62 and a mounting seat 63, which are arranged in sequence from bottom to top, the inner diameter of the first ring portion 61 is consistent with the inner diameter of the second ring portion 62, the outer diameter of the first ring portion 61 is larger than the outer diameter of the second ring portion 62, and the diameter of the connection between the first ring portion 61 and the second ring portion 62 gradually increases from top to bottom, so that the connection between the first ring portion 61 and the second ring portion 62 forms an annular contact surface 622, and the contact surface 622 is inclined. The first ring portion 61 is slidably connected to the inner wall of the first sealing cavity 51, and the second ring portion 62 is slidably connected to the inner wall of the second sealing cavity 52, so that the sliding member 6 and the driving cylinder 5 cooperate to form a variable-volume driving cavity 56, and the medium channel 55 is connected to the driving cavity 56.

[0050] Based on the above, when the sliding member 6 in this embodiment is at the highest position, it is the third working position of the sliding member 6 (refer to Figure 3 ), at this time, the contact surface 622 faces the medium channel 55. When the medium is filled into the driving chamber 56, the first ring portion 61 is pushed downward by the pressure of the medium until the sliding member 6 reaches the fourth working position. When the medium in the driving chamber 56 is drawn out, the sliding member 6 can be moved upward to the third working position, thereby realizing the sliding of the sliding member 6 through the input and output of the medium.

[0051] It should be noted that in some other embodiments, the outer diameter of the second ring portion 62 can be larger than the outer diameter of the first ring portion 61, and the bottom position of the sliding member 6 is the third working position, so that after the medium is filled into the interior of the driving chamber 56, the sliding member 6 slides upward to the fourth working position.

[0052] For example, the medium in this embodiment is hydraulic oil, and an oil tank and an oil pump are provided on one side of the drive cylinder 5 to drive the sliding member 6 to slide. In other embodiments, the medium may also be control liquid, and the sliding member 6 slides by filling and extracting the control liquid into the driving chamber 56; the medium may also be compressed air, and the sliding member 6 slides by inflating and deflating the driving chamber 56.

[0053] In addition, in order to ensure the sealing effect of the driving chamber 56, sealing rings are provided on the inner ring of the driving cylinder body 5 and the outer ring of the second ring portion 62 to ensure the sealing effect between the first ring portion 61 and the first sealing chamber 51 and the sealing effect between the second ring portion 62 and the second sealing chamber 52.

[0054] Reference Figure 3The rotary gate valve also includes a housing 8, which includes an annular shell 81 and an end cover 82 arranged in sequence from bottom to top. The outer wall of the driving cylinder 5 is connected with a convex ring 57. The annular shell 81 is located above the medium channel 55. The annular shell 81 is covered on the outside of the driving cylinder 5 and is sealed with the outer ring of the convex ring 57. The end cover 82 is connected to the top of the annular shell 81 and seals the top of the annular shell 81. The valve stem 3 rotates through the end cover 82, and a bearing is provided at the connection between the valve stem 3 and the end cover 82 to reduce the rotation resistance of the valve stem 3. The upper part of the rotary gate valve is sealed by the housing 8 to prevent external substances from contacting the transmission assembly 7 and other components installed between the valve stem 3 and the housing 8.

[0055] In order to enable the sliding member 6 to be accurately positioned at the third working position, the mounting seat 63 is connected to the top of the second ring portion 62, and a first elastic member 91 is provided between the mounting seat 63 and the driving cylinder 5. The first elastic member 91 in this embodiment is a return spring, and the return spring abuts between the mounting seat 63 and the convex ring 57. When the top of the mounting seat 63 abuts the end cover 82, the return spring is still in a compressed state, that is, the return spring always applies an upward elastic force to the mounting seat 63, so that the top of the mounting seat 63 always abuts the end cover 82, and finally when the rotary gate valve is closed, the sliding member 6 is accurately positioned at the third working position, ensuring the stability of the rotary gate valve; the return spring can also drive the sliding member 6 to return to the third working position by its own elastic force after the sliding member 6 slides downward.

[0056] It should be noted that, in some other embodiments, the return spring may also be fixedly connected between the mounting seat 63 and the convex ring 57; in some other embodiments, the first elastic member 91 may also be other elastic components such as a rubber column.

[0057] In addition, a bearing is arranged between the mounting seat 63 and the return spring. The bearing in this embodiment is a thrust bearing 631. The axis of the thrust bearing 631 is arranged vertically, the top of the thrust bearing 631 is connected to the mounting seat 63, and the bottom of the thrust bearing 631 is connected to the return spring, so that the end of the return spring close to the mounting seat 63 can rotate relative to the mounting seat 63, which can offset the horizontal torsion when the return spring is compressed and extended, prevent the return spring from being deformed due to torsion, and improve the working stability of the return spring.

[0058] It is further preferred that in order to enable the sliding member 6 to slide in a straight line and be accurately positioned at the fourth working position, one of the second ring portion 62 and the driving cylinder body 5 is provided with a guide groove 621 along a sliding direction parallel to the first ring portion 61, and the other is connected with a guide member 54, which is plugged into the guide groove 621 and can slide relative to the guide groove 621 along the length direction of the guide groove 621.

[0059] Specifically in this embodiment, the guide groove 621 is provided on the outer ring of the second ring portion 62, and a plurality of guide grooves 621 are evenly provided along the circumference of the second ring portion 62. A guide member 54 is provided corresponding to each guide groove 621. The guide member 54 in this embodiment is a guide block, which is slidably provided inside the guide groove 621. All guide blocks are detachably connected to the drive cylinder 5 by screws, so as to replace excessively worn guide blocks, guide blocks of other different specifications, or guide blocks of other different materials. Therefore, during the sliding process of the sliding member 6, the sliding member 6 is guided and limited by the cooperation of the guide member 54 and the guide groove 621, and the two extreme positions of the sliding member 6 are limited, so that the sliding member 6 can be accurately positioned at the third working position and the fourth working position.

[0060] Reference Figure 3 , Figure 4 and Figure 5 The transmission assembly 7 includes a transmission ring 71 and a transmission member 72. The transmission ring 71 is coaxially arranged with the valve stem 3. A spiral groove 711 is provided on the transmission ring 71. The transmission member 72 is inserted into the spiral groove 711. One of the transmission ring 71 and the transmission member 72 is connected to the valve stem 3, and the other is connected to the sliding member 6. Specifically in this embodiment, the middle section of the valve stem 3 is provided with a crimping ring 31 with a diameter larger than that of its body, and the top of the crimping ring 31 is processed with two positioning grooves along its radial direction, so that the top of the crimping ring 31 forms a straight-line boss 311; the transmission ring 71 is sleeved on the outside of the valve stem 3, and a straight-line groove 712 is provided at the bottom end of the transmission ring 71. The boss 311 and the groove 712 are plugged and matched, thereby realizing the circumferential positioning of the transmission ring 71, so that the transmission ring 71 can rotate synchronously with the valve stem 3.

[0061] It should be noted that, in some other embodiments, the transmission ring 71 can also be fixedly connected to the outside of the valve stem 3, so that the transmission ring 71 and the valve stem 3 rotate synchronously; the valve stem 3 and the transmission ring 71 can also be penetrated by components such as pins or screws at the same time, so that the transmission ring 71 and the valve stem 3 can rotate synchronously.

[0062] In this embodiment, the transmission member 72 is used as a positioning pin, and the positioning pin is connected to the mounting seat 63 as an example. When the mounting seat 63 slides, the positioning pin is driven to slide synchronously, so that the positioning pin pushes against the side wall of the spiral groove 711, thereby causing the transmission ring 71 to rotate, thereby driving the valve stem 3 to rotate synchronously, thereby realizing the opening and closing of the rotary gate valve.

[0063] Furthermore, a plurality of spiral grooves 711 are provided along the circumference of the transmission ring 71 . In this embodiment, two are used as an example, and a transmission member 72 is provided with one corresponding to each spiral groove 711 , so that the transmission ring 71 is subjected to a more uniform force and works more stably.

[0064] Reference Figure 1 and Figure 6In order to make the rotary gate valve of this embodiment applicable to underwater environment, a driving panel 10 is provided on the side of the housing 8 away from the valve body 1, and a driving head 103 is rotatably provided on the driving panel 10, and the driving head 103 is coaxially connected to the valve stem 3. The driving panel 10 in this embodiment is an ROV panel that can be docked with an ROV (Remote Operated Vehicle), and the driving head 103 is a connecting sleeve that can be docked with an ROV, so that when the rotary gate valve is used in an underwater environment, the valve stem 3 is driven by the ROV to realize the opening and closing of the rotary gate valve.

[0065] In addition, an open mark 101 and a closed mark 102 are also provided on the drive panel 10, and an indicator arrow 1031 is provided on the drive head 103. When the valve stem 3 is in the first working position, the indicator arrow 1031 points to the closed mark 102. When the valve stem 3 is in the second working position, the indicator arrow 1031 points to the closed mark 102. Therefore, the current state of the rotary gate valve can be identified according to the open mark 101 and the closed mark 102.

[0066] In addition, a second elastic member 92 is provided between the valve stem 3 and the valve cover 2, and the second elastic member 92 can apply an elastic force to the valve stem 3 away from the valve cover 2. Specifically, the inner ring of the driving cylinder 5 is threadedly connected with a pressing ring 58, and the second elastic member 92 is a spring, which is sleeved on the outside of the valve stem 3 and abuts between the pressing ring 58 and the crimping ring 31. The spring always applies an upward elastic force to the crimping ring 31 (i.e., the valve stem 3) to offset the water pressure borne by the valve stem 3, thereby helping to prevent the valve stem 3 from being easily axially moved.

[0067] It is worth noting that, in some other embodiments, in order to adapt to other environments, the driving panel 10 may also be replaced by a panel adapted thereto.

[0068] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A rotary gate valve, comprising a gate valve body, the gate valve body comprising a valve body (1), a valve cover (2), a valve stem (3) and a valve seat cylinder (4), the valve cover (2) being arranged on the valve body (1), a cavity (21) being provided between the valve body (1) and the valve cover (2), the valve seat cylinder (4) being arranged inside the cavity (21), the valve stem (3) passing through the valve cover (2) and being connected to the valve seat cylinder (4); when the gate valve body is closed, the valve seat cylinder (4) is in a first working position, and when the gate valve body is opened, the valve seat cylinder (4) rotates from the first working position to a second working position, characterized in that: The rotary gate valve further comprises a driving mechanism, wherein the driving mechanism comprises: A drive cylinder (5), the drive cylinder (5) being arranged on a side of the valve cover (2) away from the valve body (1), and the valve stem (3) extending out of the drive cylinder (5); a sliding member (6), the sliding member (6) being slidably disposed inside the driving cylinder body (5) along an axial direction parallel to the valve stem (3), the sliding member (6) being capable of sliding from a third working position to a fourth working position; and A transmission assembly (7), wherein the transmission assembly (7) is connected between the sliding member (6) and the valve stem (3), and the transmission assembly (7) is capable of driving the valve seat cylinder (4) to switch between the first working position and the second working position when the sliding member (6) slides between the third working position and the fourth working position.

2. A rotary gate valve according to claim 1, characterized in that: A first sealing chamber (51) and a second sealing chamber (52) are arranged inside the driving cylinder body (5) along its axial direction; The sliding member (6) comprises: a first ring portion (61), wherein an outer ring of the first ring portion (61) is slidably connected to an inner wall of the first sealing cavity (51), and the first ring portion (61) and the first sealing cavity (51) are sealed and matched; and a second ring portion (62), wherein the outer diameter of the second ring portion (62) is larger or smaller than the outer diameter of the first ring portion (61), the outer ring of the second ring portion (62) is slidably connected to the inner wall of the second sealing cavity (52), and the second ring portion (62) and the second sealing cavity (52) are sealed and matched; The outer ring of the sliding member (6) and the inner wall of the driving cylinder (5) cooperate to form a driving chamber (56) with a variable volume. The driving cylinder (5) is provided with a medium channel (55) connected to the driving chamber (56). When the medium is filled into or drawn out of the driving chamber (56), the sliding member (6) can be driven to slide.

3. A rotary gate valve according to claim 2, characterized in that: The sliding member (6) further comprises: A mounting seat (63), wherein the mounting seat (63) is located at one end of the first ring portion (61) away from the second ring portion (62), and a first elastic member (91) is provided between the mounting seat (63) and the driving cylinder body (5), and the first elastic member (91) can reset the sliding member (6) in the fourth working position to the third working position.

4. A rotary gate valve according to claim 3, characterized in that: The first elastic member (91) is a return spring, a bearing is provided between the mounting seat (63) and the return spring, and one end of the return spring close to the mounting seat (63) is capable of rotating relative to the mounting seat (63).

5. A rotary gate valve according to claim 2, characterized in that: One of the second ring portion (62) and the driving cylinder body (5) is provided with a guide groove (621) along a sliding direction parallel to the first ring portion (61), and the other of the second ring portion (62) and the driving cylinder body (5) is connected with a guide member (54), and the guide member (54) is plug-fitted with the guide groove (621) and can slide relative to the guide groove (621) along the length direction of the guide groove (621).

6. A rotary gate valve according to any one of claims 1 to 5, characterized in that: The transmission assembly (7) comprises: a transmission ring (71), the transmission ring (71) being coaxially arranged with the valve stem (3), the transmission ring (71) being provided with a spiral groove (711); and, A transmission member (72), the transmission member (72) being inserted into the interior of the spiral groove (711); one of the transmission ring (71) and the transmission member (72) is connected to the valve stem (3), and the other is connected to the sliding member (6).

7. A rotary gate valve according to claim 6, characterized in that: A plurality of the spiral grooves (711) are provided along the circumference of the transmission ring (71), and one transmission member (72) is provided corresponding to each of the spiral grooves (711).

8. A rotary gate valve according to any one of claims 2 to 5, characterized in that: The driving cylinder (5) is provided with a convex ring (57) on the outside, and the rotary gate valve further comprises: A shell (8), wherein the shell (8) is located on a side of the medium channel (55) away from the valve body (1), the shell (8) is covered on the outside of the drive cylinder body (5) and is sealed with the outer ring of the convex ring (57), and the valve stem (3) extends out of the shell (8).

9. A rotary gate valve according to claim 8, characterized in that: A drive panel (10) is arranged on a side of the housing (8) away from the valve body (1), and a drive head (103) is rotatably arranged on the drive panel (10), and the drive head (103) is coaxially connected to the valve stem (3).

10. A rotary gate valve according to any one of claims 2 to 5, characterized in that: A second elastic member (92) is provided between the valve stem (3) and the valve cover (2), and the second elastic member (92) is capable of applying an elastic force to the valve stem (3) to move away from the valve cover (2).

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