A gate valve with a quick-opening transmission structure

Abstract

The present invention discloses a gate valve with a quick-opening transmission structure, comprising a valve body, a gate plate, a first vortex disc and a main rack; the valve body is provided with an inlet and an outlet, the gate plate is slidably arranged on the valve body and is located between the inlet and the outlet, the main rack is slidably arranged on the valve body and one end is connected to the gate plate, the main rack can drive the gate plate to reciprocate relative to the valve body, the first vortex disc is provided with a first vortex and can form a meshing connection with the main rack, and the first vortex disc rotates one circle to drive the main rack to move a distance of M tooth pitches relative to the valve body, M>1. The gate valve with a quick-opening transmission structure can not only continuously and accurately provide a small flow rate, but also has a faster opening and closing speed, thereby having a higher use efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of gate valves, and in particular to a gate valve with a quick-opening transmission structure. Background Art

[0002] The gate valve is a commonly used pipeline valve, and its main function is to cut off or regulate the flow of fluid medium. The valve has a simple and compact structure and is easy to operate. It is widely used in water supply and drainage, petroleum, chemical industry, natural gas and other industrial fields.

[0003] At present, when the gate valve is in use, the valve stem is generally driven to rotate by rotating the handle, and then the gate plate is driven to lift and lower to complete the opening and closing action. In the prior art, a thread is generally set on the valve stem, and the thread on the valve stem and the thread on the valve cover cooperate, so that the valve stem can move slowly when rotating, so that the gate valve can be in a small opening working state to provide a continuous small flow, thereby preventing the gate valve from opening too much, causing waste of medium resources such as water, oil, and natural gas, thereby achieving the effect of saving water, oil, and natural gas. However, because the thread fit and the pitch are too small, the gate valve needs to turn the handle too many times when opening and closing, and the lifting speed of the gate plate is too slow, and the long adjustment process also causes waste of the medium, which also affects the working efficiency of the gate valve when using it; at the same time, due to the thread fit, under special circumstances, the gate valve cannot be quickly converted from the closed state to the fully open state, so that the current gate valve cannot meet the use requirements of existing working conditions. Summary of the invention

[0004] In view of the above problems, the present invention proposes a gate valve with a quick-opening transmission structure, which has a reasonable structure and effectively reduces the waste of the medium in the gate valve.

[0005] A gate valve with a quick-opening transmission structure comprises a valve body, a gate plate, a first vortex disc and a main rack; the valve body is provided with an inlet and an outlet, the gate plate is slidably arranged on the valve body and is located between the inlet and the outlet, the main rack is slidably arranged on the valve body and one end is connected to the gate plate, the main rack can drive the gate plate to reciprocate relative to the valve body, the first vortex disc is provided with a first vortex and can form a meshing connection with the main rack, and the first vortex disc can drive the main rack to move a distance of M tooth pitches relative to the valve body when it rotates one circle, M>1.

[0006] Preferably, the gate valve with a quick-opening transmission structure also includes a second vortex disk, on which a second vortex is provided. The second vortex can form a meshing connection with the main rack while the first vortex is disengaged from the meshing connection with the main rack. One rotation of the second vortex disk can drive the main rack to move a distance of N tooth pitches relative to the valve body, where N<M.

[0007] Preferably, the gate valve with a quick-opening transmission structure also includes a valve stem, which is rotatably arranged with the valve body, the first vortex disk is coaxially connected to the valve stem and can rotate synchronously with the valve stem, and the second vortex disk is coaxially connected to the valve stem and can rotate synchronously with the valve stem; the first vortex disk can move back and forth along the axial direction of the valve stem to form a meshing connection or disengagement with the main rack; the second vortex disk can move back and forth along the axial direction of the valve stem to form a meshing connection or disengagement with the main rack.

[0008] Preferably, the gate valve with a quick-opening transmission structure also includes a first rack, a second rack and a gear, and the valve stem is provided with a valve stem groove arranged along its axial direction; the gear is rotatably arranged at the valve stem groove, the first rack is arranged on the first vortex disk along the axial direction of the valve stem and is meshed with the gear, and the second rack is arranged on the second vortex disk along the axial direction of the valve stem and is meshed with the gear; the first rack and the second rack can move in the opposite direction along the axial direction of the valve stem through the gear.

[0009] Preferably, the gate valve with a quick-opening transmission structure also includes a control rod; the control rod is slidably connected to the valve stem, and one end of the control rod extends to connect with the second scroll disk to drive the second scroll disk to reciprocate along the axial direction of the valve stem.

[0010] Preferably, the valve stem is provided with a first annular groove, a second annular groove and an axial groove, and the outer surface of the control rod is provided with a control pin extending radially thereof; the first annular groove and the second annular groove are arranged at intervals along the axial direction of the valve stem, and the axial groove connects the first annular groove and the second annular groove; the control pin can reciprocate in the first annular groove and the second annular groove respectively and reciprocate along the axial groove; when the control pin is located in the first annular groove, the first vortex disk is meshed and connected with the main rack, and the second vortex disk is disconnected from the main rack; when the control pin is located in the second annular groove, the first vortex disk is disconnected from the main rack, and the second vortex disk is meshed and connected with the main rack.

[0011] Preferably, the gate valve with a quick-opening transmission structure also includes a connecting rod frame; the connecting rod frame is rotatably arranged on the valve body, one end of the connecting rod frame serves as an operating end, and the other end of the connecting rod frame is rotatably connected to the gate plate; the connecting rod frame can rotate relative to the valve body to drive the gate plate to move relative to the valve body.

[0012] Preferably, the valve stem is rotatably arranged at an operating end of the connecting rod frame, and the connecting rod frame can drive the valve stem to rotate until the first scroll plate and the second scroll plate are disengaged from the meshing connection with the main rack.

[0013] Preferably, the gate valve with a quick-opening transmission structure also includes a positioning claw, and a positioning groove is provided on the connecting rod frame; one end of the positioning claw is rotatably arranged on the valve body through a positioning torsion spring, and the positioning torsion spring can drive the positioning claw to rotate until it extends into the positioning groove to limit the rotation of the connecting rod frame relative to the valve body.

[0014] Preferably, the gate valve with a quick-opening transmission structure further comprises a handle, wherein the handle is connected to the valve stem to drive the valve stem to rotate.

[0015] The gate valve with a quick-opening transmission structure of the present invention has the following beneficial technical effects:

[0016] 1. In the present invention, the main rack and the first scroll disk are matched, and since the first scroll disk drives the main rack to move a distance of M tooth pitches each time it rotates one circle, M>1, the gate valve with a quick-opening transmission structure can be opened and closed normally faster, thereby improving the use efficiency of the gate valve with a quick-opening transmission structure, preventing the waste of the medium in the gate valve during the opening and closing process, and playing a role in saving water, oil, natural gas and other media.

[0017] 2. In the present invention, by arranging the main rack and the second vortex disk to cooperate, since the second vortex disk rotates one circle, it will drive the main rack to move a distance of N tooth pitches, N<M, so that the gate valve with a quick-opening transmission structure can be more accurate in adjusting the flow rate, and can be accurately adjusted to a small opening working position, so that the gate valve can continuously provide a small flow rate, thereby improving the performance of the gate valve with a quick-opening transmission structure; at the same time, by first using the first vortex disk, the gate plate can quickly reach the vicinity of the adjustment position, and then the second vortex disk is used to fine-tune the gate plate position, which saves adjustment time without affecting the adjustment accuracy, thereby achieving the effect of saving water, oil, natural gas and other media.

[0018] 3. In the present invention, by arranging the main rack and the first vortex disk and the second vortex disk in coordination, since the first vortex disk and the second vortex disk can be quickly separated from the main rack, when the gate plate needs to be opened quickly, the gate plate can be quickly freed from the restraint, and has the conditions for quick opening, thereby further improving the use efficiency and performance of the gate valve with a quick-opening transmission structure.

[0019] 4. In the present invention, by arranging the connecting rod frame and the gate plate to cooperate, when quick opening is required, the connecting rod frame can be pulled downward, thereby driving the gate plate to move upward quickly to complete the quick opening and meet the quick opening requirement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic cross-sectional structure diagram of a gate valve with a quick-opening transmission structure according to this embodiment;

[0021] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0022] Figure 3 for Figure 1 The schematic diagram of the local enlarged structure at position I in the middle;

[0023] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along the BB direction;

[0024] Figure 5 In this embodiment, the second scroll plate and the main rack cooperate Figure 1 Schematic diagram of the local enlarged structure at point I in the middle. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] Combination Figures 1 to 5 As shown, the gate valve with a quick-opening transmission structure in this embodiment includes a valve body 1, a gate plate 2, a main rack 3 and a first vortex disc 4. Among them, an inlet and an outlet are provided on the valve body 1, and the gate plate 2 is slidably arranged on the valve body 1 and is located between the inlet and the outlet to control the on-off between the inlet and the outlet. The main rack 3 is slidably arranged on the valve body 1 and the lower end is connected to the gate plate 2. The main rack 3 can drive the gate plate 2 to reciprocate relative to the valve body 1. The end surface of the first vortex disc 4 is provided with a first vortex 5 and can form a meshing connection with the main rack 3 through the first vortex 5. When the first vortex disc 4 rotates one circle, the main rack 3 can be driven by the first vortex 5 to move a distance of M tooth pitches relative to the valve body 1. In this embodiment, M is equal to 2.

[0027] At this time, by setting the main rack and the first vortex disk to cooperate, the main rack is driven to move two tooth pitches each time the first vortex disk rotates one circle, so that the gate valve can be opened and closed normally faster and the use efficiency is improved. Of course, in other embodiments, the parameters of the first vortex can be adjusted according to different use environments, so that the first vortex disk rotates one circle and drives the main rack to move a distance of other number of tooth pitches, such as 3 tooth pitches or 4 tooth pitches.

[0028] Combination Figures 1 to 5As shown, in the gate valve with a quick-opening transmission structure of this embodiment, a second vortex disc 6 is also provided. The end surface of the second vortex disc 6 is provided with a second vortex 7, and the second vortex 7 can also form a meshing connection with the main rack 3, while the first vortex 5 can be disengaged from the meshing connection with the main rack 3, that is, the first vortex 5 and the second vortex 7 can both form a meshing connection with the main rack 3 or disengage. When the second vortex disc 6 rotates one circle, it can drive the main rack 3 to move a distance of N tooth pitches relative to the valve body 1 through the second vortex 7, where N is less than M, and in this embodiment, N is equal to 1.

[0029] At this time, by arranging the main rack and the second vortex disk to cooperate, since the second vortex disk rotates one circle, it will drive the main rack to move a distance of one tooth pitch, so that the gate valve can adjust the flow more accurately and improve the performance of the gate valve. Of course, in other embodiments, according to different use environments and different parameters of the first vortex, the parameters of the second vortex can be adjusted, so that the second vortex disk rotates one circle and drives the main rack to move a distance of other number of tooth pitches, such as 2 tooth pitches or 3 tooth pitches.

[0030] Combination Figures 1 to 5 As shown, in the gate valve with a quick-opening transmission structure of this embodiment, a valve stem 8 is also provided. The valve stem 8 can rotate relative to the valve body 1, the first scroll disc 4 is coaxially connected to the valve stem 8 and can rotate synchronously with the valve stem 8, and the second scroll disc 6 is coaxially connected to the valve stem 8 and can rotate synchronously with the valve stem 8. At the same time, the first scroll disc 4 can reciprocate along the axial direction of the valve stem 8 to form a meshing connection or disengagement with the main rack 3; the second scroll disc 6 can reciprocate along the axial direction of the valve stem 8 to form a meshing connection or disengagement with the main rack 3.

[0031] At this time, by controlling the rotation of the valve stem, the first vortex disk and the second vortex disk can be driven to rotate back and forth, thereby driving the main rack to move back and forth, and by controlling the axial movement of the first vortex disk and the second vortex disk along the valve stem, the meshing relationship between the first vortex disk and the second vortex disk and the main rack can be controlled, thereby realizing the valve stem driving the main rack to move at different speeds through the first vortex disk and the second vortex disk, thereby realizing the control of the movement speed of the gate relative to the valve body.

[0032] Combination Figures 1 to 5 As shown, in the gate valve with a quick-opening transmission structure of this embodiment, a first rack 9, a second rack 10 and a gear 11 are also provided, and a valve stem groove 12 arranged along the axial direction thereof is provided on the valve stem 8. Among them, the gear 11 is rotatably arranged at the valve stem groove 12, the first rack 9 is arranged on the first volute disk 4 along the axial direction of the valve stem 8 and is meshed with the gear 11, and the second rack 10 is arranged on the second volute disk 6 along the axial direction of the valve stem 8 and is meshed with the gear 11. The first rack 9 and the second rack 10 can move in the opposite direction along the axial direction of the valve stem 8 through the gear 11.

[0033] At this time, when controlling the first vortex disk or the second vortex disk to move along the axial direction of the valve stem, the second vortex disk or the first vortex disk can be automatically controlled to move in the opposite direction through the first rack, the second rack and the gear. That is, when the first vortex disk is controlled to move toward the main rack, the second vortex disk moves away from the main rack. Conversely, when the first vortex disk is controlled to move away from the main rack, the second vortex disk moves toward the main rack, thereby realizing the rapid switching of the meshing relationship between the first vortex disk and the second vortex disk and the main rack, further improving the convenience and flexibility of the fast gate operation and the control speed of the gate.

[0034] Combination Figures 1 to 5 As shown, in the gate valve with a quick-opening transmission structure of this embodiment, a control rod 13 is further provided. The control rod 13 is coaxially slidably arranged with the valve stem 8, one end of the control rod 13 is located outside the valve stem 8, and one end of the control rod 13 extends to form a connection with the second scroll 6 to drive the second scroll 6 to reciprocate along the axial direction of the valve stem 8.

[0035] At this time, by driving the control rod to move back and forth axially relative to the valve stem, the second scroll disk can be driven to move axially along the valve stem, and then the first scroll disk can be driven to move in the opposite direction, thereby realizing the change of the meshing connection relationship between the first scroll disk, the second scroll disk and the main rack.

[0036] Combination Figure 3 and Figure 5 As shown, in the gate valve with a quick-opening transmission structure of this embodiment, a first annular groove 14, a second annular groove 15 and an axial groove 16 are provided on the valve stem 8, and a control pin 17 extending radially thereof is provided on the outer surface of the control rod 13. The first annular groove 14 and the second annular groove 15 are arranged at intervals along the axial direction of the valve stem 8, and the axial groove 16 connects the first annular groove 14 and the second annular groove 15 along the axial direction of the valve stem 8. The control pin 17 can reciprocate in the first annular groove 14 and the second annular groove 15 and reciprocate along the axial groove 16, respectively.

[0037] When the control pin 17 is located in the first annular groove 14, the first scroll 4 is in a meshing connection with the main rack 3, while the second scroll 6 is disconnected from the main rack 3. Conversely, when the axial groove 16 of the control pin 17 moves to the second annular groove 15, the first scroll 4 is switched to a disconnected relationship with the main rack 3, while the second scroll 6 moves to a meshing connection with the main rack 3.

[0038] At this time, by driving the control rod to control the position of the pin during the movement of the valve stem, the positions of the first vortex disk and the second vortex disk can be quickly and accurately positioned, thereby achieving rapid and accurate switching of the meshing relationship between the first vortex disk and the second vortex disk and the main rack, thereby improving the ease of use of the gate valve with a quick-opening transmission structure.

[0039] Combination Figures 1 to 5 As shown, in the gate valve with a quick-opening transmission structure of this embodiment, a connecting rod frame 18 is further provided. The middle position of the connecting rod frame 18 is rotatably arranged on the valve body 1, the upper end of the connecting rod frame 18 serves as an operating end, and the lower end of the connecting rod frame 18 is rotatably connected to the gate plate 2 via a connecting shaft. The connecting rod frame 18 can rotate relative to the valve body 1 to drive the gate plate 2 to reciprocate relative to the valve body 1.

[0040] At this time, by controlling the connecting rod frame to rotate relative to the valve body, the gate plate can move quickly relative to the valve body, realizing faster opening and closing operations of the gate plate, thereby meeting the rapid opening and closing requirements of the fast gate plate and improving the use efficiency of the fast gate plate.

[0041] Combination Figures 1 to 5 As shown, in the gate valve with a quick-opening transmission structure of this embodiment, the valve stem 8 is rotatably arranged at the operating end of the connecting rod frame 18. When the connecting rod frame 18 rotates relative to the valve body 1, it can not only drive the gate plate 2 to move relative to the valve body 1, but also drive the valve stem 8 to rotate, so that the first scroll plate 4 and the second scroll plate 6 are simultaneously disengaged from the meshing connection with the main rack 3, thereby realizing the quick opening operation of the quick gate plate.

[0042] Combination Figure 3 and Figure 5 As shown, in the gate valve with a quick-opening transmission structure of this embodiment, a positioning claw 19 is further provided, and a corresponding positioning groove 20 is provided on the connecting rod frame 18. One end of the positioning claw 19 is rotatably arranged on the valve body 1 through a positioning torsion spring 21, and the positioning torsion spring 21 can drive the positioning claw 19 to rotate until it extends into the positioning groove 20, so as to limit the rotation of the connecting rod frame 18 relative to the valve body 1.

[0043] At this time, when it is necessary to rotate the connecting rod frame, the positioning claw is first driven to overcome the force of the positioning torsion spring and disengage from the positioning groove, thereby releasing the rotation restriction on the connecting rod frame, and then the connecting rod frame can be driven to rotate relative to the valve body; conversely, when it is not necessary to rotate the connecting rod frame, the positioning claw can be kept in the positioning groove under the action of the positioning torsion spring, thereby fixing the position of the connecting rod frame and keeping the position of the valve stem unchanged.

[0044] Combination Figure 1As shown, in the gate valve with a quick-opening transmission structure of this embodiment, a fixing frame 22 as a part thereof is provided on the valve body 1. The fixing frame 22 is arranged in the vertical direction, and the main rack 3 passes through the fixing frame 22 and forms a sliding connection with the fixing frame 22, so that the reciprocating movement of the main rack 3 can be positioned and guided by means of the fixing frame 22. In addition, the positioning claw 19 is directly arranged on the fixing frame 22 through the positioning torsion spring 21, and the fixing frame 22 can be used to assist in positioning the rotation position of the connecting rod frame 18, thereby ensuring the accuracy and stability of the position of the connecting rod frame 18, and improving the accuracy and stability of the first scroll plate 4 and the second scroll plate 6 driving the main rack 3.

[0045] In addition, according to Figure 3 As shown, in the gate valve with a quick-opening transmission structure of this embodiment, a handle 23 is further provided. The handle 23 is connected to the valve stem 8 to drive the valve stem 8 to rotate and drive the connecting rod frame 18 to rotate.

[0046] In addition, combined Figure 1 and Figure 2 As shown, in the gate valve with a quick-opening transmission structure of this embodiment, a connecting block 24 is provided on the top of the gate plate 2, and the main rack 3 and the connecting rod frame 18 are connected to the connecting block 24 to achieve movement control of the gate plate 2.

[0047] Combination Figures 1 to 5 As shown, the specific working process of the gate valve with a quick-opening transmission structure in this embodiment is as follows:

[0048] When the gate valve with a quick-opening transmission structure of this embodiment needs to be opened and closed normally, Figure 1 As an example, the handle 23 is first turned to drive the valve stem 8 to rotate synchronously. At this time, the first scroll disc 4 is meshed with the main rack 3, and the second scroll disc 6 is out of mesh with the main rack 3. Therefore, when the valve stem 8 drives the first scroll disc 4 to rotate, the first scroll disc 4 drives the main rack 3 to rotate through the first scroll 5. Figure 1 The first scroll plate 4 moves in the vertical direction as shown, thereby driving the gate plate 2 to move up and down through the connecting block 24 to realize the opening and closing of the gate valve with a quick opening transmission structure. Since the first scroll plate 4 rotates one circle, the main rack 3 can move a distance of 2 tooth pitches, thereby forming a faster opening and closing speed than the existing thread-driven gate.

[0049] When it is necessary to adjust the flow rate of the gate valve with a quick-opening transmission structure of this embodiment, first rotate the control rod 13 to rotate the control pin 17 along the first annular groove 14 to a position aligned with the axial groove 16, and then push the control rod 13 to move relative to the valve stem 8, so that the control pin 17 moves along the axial groove 16 to the second annular groove 15. In this process, the control rod 13 drives the second vortex disk 6 to move in the direction close to the main rack 3 and finally forms a meshing connection with the main rack 3. At the same time, the second vortex disk 6 drives the second rack 10 to drive the gear 11 to rotate, and the gear 11 then drives the first vortex disk 4 to move in the direction away from the main rack 3 through the first rack 9 and finally disengages from the meshing connection with the main rack 3, completing the switching of the meshing connection relationship between the first vortex disk 4 and the second vortex disk 6 and the main rack 3. Then, rotate the handle 23, and the handle 23 drives the second vortex disk 6 to rotate through the valve stem 8, and then the second vortex disk 6 drives the main rack 3 to the direction through the second vortex 7. Figure 1 The gate plate 2 is moved in the vertical direction as shown, thereby driving the gate plate 2 to rise and fall through the connecting block 24. Since the second scroll plate 6 rotates one circle, the main rack 3 can move a distance of 1 tooth pitch, so that the gate plate 2 can be raised and lowered at a lower speed, forming a precise control of the gate plate lifting and lowering, which can not only adjust the gate valve to a working state with a small opening and continuously provide a small flow, but also achieve the effect of accurately adjusting the flow.

[0050] When encountering special circumstances and requiring the gate valve with a quick opening transmission structure of this embodiment to be opened quickly, first, the positioning claw 19 is rotated to overcome the force of the positioning torsion spring 21 and disengage from the positioning groove 20, thereby releasing the rotation restriction of the connecting rod frame 18, and then the operating handle 23 is moved downward to drive the connecting rod frame 18 to rotate. On the one hand, the valve stem 8 drives the first vortex disc 4 and the second vortex disc 6 to move away from the main rack 3 at the same time and disengage from the meshing connection with the main rack 3, and on the other hand, the gate plate 2 is driven to move upward quickly relative to the valve body 1, so as to realize the quick opening of the gate valve with a quick opening transmission structure. When it is necessary to resume the opening and closing operation of the gate valve with a quick opening transmission structure of this embodiment, the operating handle 23 is moved upward to drive the connecting rod frame 18 to rotate in the opposite direction, so that the positioning claw 19 re-enters the positioning groove 20 to resume the position fixation of the connecting rod frame 18, and the first vortex disc 4 resumes the meshing connection with the main rack 3.

Claims

1. A gate valve with a quick-opening transmission structure, characterized in that: The invention comprises a valve body (1), a gate plate (2), a first vortex disc (4) and a main rack (3); the valve body (1) is provided with an inlet and an outlet, the gate plate (2) is slidably arranged on the valve body (1) and is located between the inlet and the outlet, the main rack (3) is slidably arranged on the valve body (1) and one end of the main rack (3) is connected to the gate plate (2), the main rack (3) can drive the gate plate (2) to reciprocate relative to the valve body (1), the first vortex disc (4) is provided with a first vortex (5) and can form a meshing connection with the main rack (3), and the first vortex disc (4) can drive the main rack (3) to move a distance of M tooth pitches relative to the valve body (1) after one rotation, M>1; The gate valve with a quick-opening transmission structure also includes a second vortex disk (6), on which a second vortex (7) is provided, the second vortex (7) being able to form a meshing connection with the main rack (3) while the first vortex (5) is separated from the meshing connection with the main rack (3), and the second vortex disk (6) being able to drive the main rack (3) to move a distance of N tooth pitches relative to the valve body (1) after one rotation, N<M; The gate valve with a quick-opening transmission structure also includes a valve stem (8), the valve stem (8) is rotatably arranged with the valve body (1), the first vortex disk (4) is coaxially connected to the valve stem (8) and can rotate synchronously with the valve stem (8), and the second vortex disk (6) is coaxially connected to the valve stem (8) and can rotate synchronously with the valve stem (8); the first vortex disk (4) can move back and forth along the axial direction of the valve stem (8) to form a meshing connection or disengagement with the main rack (3); the second vortex disk (6) can move back and forth along the axial direction of the valve stem (8) to form a meshing connection or disengagement with the main rack (3).

2. The gate valve with a quick-opening transmission structure according to claim 1, characterized in that: The gate valve with a quick-opening transmission structure also includes a first rack (9), a second rack (10) and a gear (11); the valve stem (8) is provided with a valve stem groove (12) arranged along its axial direction; the gear (11) is rotatably arranged at the valve stem groove (12); the first rack (9) is arranged on the first vortex disk (4) along the axial direction of the valve stem (8) and is meshed with the gear (11); the second rack (10) is arranged on the second vortex disk (6) along the axial direction of the valve stem (8) and is meshed with the gear (11); the first rack (9) and the second rack (10) can move in the opposite direction along the axial direction of the valve stem (8) through the gear (11).

3. The gate valve with a quick-opening transmission structure according to claim 2, characterized in that: The gate valve with a quick-opening transmission structure also includes a control rod (13); the control rod (13) is slidably connected to the valve stem (8), and one end of the control rod (13) extends to connect with the second scroll disk (6) to drive the second scroll disk (6) to reciprocate along the axial direction of the valve stem (8).

4. The gate valve with a quick-opening transmission structure according to claim 3, characterized in that: The valve stem (8) is provided with a first annular groove (14), a second annular groove (15) and an axial groove (16); the outer surface of the control rod (13) is provided with a control pin (17) extending in the radial direction thereof; the first annular groove (14) and the second annular groove (15) are arranged at intervals along the axial direction of the valve stem (8); the axial groove (16) communicates with the first annular groove (14) and the second annular groove (15); the control pin (17) can be respectively inserted into the first annular groove (14) and the second annular groove (15); The control pin (17) is configured to reciprocate in the first annular groove (15) and reciprocate along the axial groove (16); when the control pin (17) is located in the first annular groove (14), the first vortex disk (4) is meshedly connected with the main rack (3), and the second vortex disk (6) is disconnected from the main rack (3); when the control pin (17) is located in the second annular groove (15), the first vortex disk (4) is disconnected from the main rack (3), and the second vortex disk (6) is meshedly connected with the main rack (3).

5. The gate valve with a quick-opening transmission structure according to claim 1, characterized in that: The gate valve with a quick-opening transmission structure also includes a connecting rod frame (18); the connecting rod frame (18) is rotatably arranged on the valve body (1), one end of the connecting rod frame (18) serves as an operating end, and the other end of the connecting rod frame (18) is rotatably connected to the gate plate (2); the connecting rod frame (18) can rotate relative to the valve body (1) to drive the gate plate (2) to move relative to the valve body (1).

6. The gate valve with a quick-opening transmission structure according to claim 5, characterized in that: The valve stem (8) is rotatably arranged at the operating end of the connecting rod frame (18), and the connecting rod frame (18) can drive the valve stem (8) to rotate until the first scroll plate (4) and the second scroll plate (6) are disengaged from the meshing connection with the main rack (3).

7. The gate valve with a quick-opening transmission structure according to claim 6, characterized in that: The gate valve with a quick-opening transmission structure also includes a positioning claw (19), and a positioning groove (20) is provided on the connecting rod frame (18); one end of the positioning claw (19) is rotatably arranged on the valve body (1) through a positioning torsion spring (21), and the positioning torsion spring (21) can drive the positioning claw (19) to rotate until it extends into the positioning groove (20) to limit the rotation of the connecting rod frame (18) relative to the valve body (1).

8. The gate valve with a quick-opening transmission structure according to claim 1, characterized in that: The gate valve with a quick-opening transmission structure also includes a handle (23), wherein the handle (23) is connected to the valve stem (8) to drive the valve stem (8) to rotate.

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