Gate valve

Abstract

The utility model relates to the technical field of gate valves, in particular to a gate valve which comprises a valve body and a first valve seat, a fixing support is arranged on the valve body, a nut seat is arranged on the fixing support, a valve plate is arranged in the valve body, a connecting rod is coaxially arranged at the end, close to the valve plate, of a screw rod, and the connecting rod is fixedly connected with the valve plate. The end, away from the connecting rod, of the screw rod is coaxially and fixedly connected with a first hand wheel, the screw rod and the nut base are coaxially arranged, and an adjusting mechanism is arranged on the valve plate. The mounting hole is formed in the valve plate, when the required circulation amount of a pipeline medium is low, the second hand wheel is rotated to enable the worm and the worm gear to be in meshing transmission, then the valve rod drives the sealing disc to rotate, and the medium in the pipeline circulates through the mounting hole; adjustment and throttling of a medium in a pipeline are achieved by adjusting the rotating angle of the sealing disc, and the application range is wide.

Description

Technical Field

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

[0002] The opening and closing part of a gate valve is the valve disc. The direction of movement of the valve disc is perpendicular to the direction of the medium. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The valve disc has two sealing surfaces. The two sealing surfaces of the most commonly used model valve disc valve form a wedge shape. The wedge angle varies with the valve parameters, usually 5°, and 2°52' when the medium temperature is not high. The valve disc of a wedge-type gate valve can be made into a whole, called a rigid valve disc; it can also be made into a valve disc that can produce slight deformation to improve its processability and compensate for the deviation of the sealing surface angle during the processing process. This type of valve disc is called an elastic valve disc.

[0003] Referring to the Chinese patent application with publication number CN208281538U, a gate valve is disclosed. This new gate valve achieves a blocking effect by inserting a double-layer valve plate on the diverter plate in the gate body. The valve plate will not wear out. The sealing gasket provided ensures the absolute sealing of the valve plate, thereby improving the sealing performance of the gate valve.

[0004] However, in the prior art, a double-layer valve plate is inserted into the diverter plate in the gate body to achieve the blocking effect. Although the impact on the valve plate is reduced, it affects the full opening of the valve. At the same time, the existing gate valve cannot achieve the effects of regulation and throttling, and is not suitable for the complex transportation environment in the pipeline. For this reason, we designed a gate valve. Summary of the Invention

[0005] A gate valve provided in an embodiment of the present application can achieve the technical problem of regulating and throttling the medium in the pipeline.

[0006] The embodiment of the present application provides a gate valve, comprising a valve body and a first valve seat, wherein flange mounting plates are provided at both ends of the valve body, a fixing bracket is provided on the valve body, a nut seat is provided on the fixing bracket, a valve plate is provided within the valve body, a connecting rod is coaxially provided at one end of the screw rod close to the valve plate, the connecting rod is fixedly connected to the valve plate, a first hand wheel is coaxially fixedly connected at one end of the screw rod away from the connecting rod, the screw and the nut seat are coaxially arranged, an adjusting mechanism is provided on the valve plate, and the adjusting mechanism is used to achieve throttling of the medium in a complex conveying environment in the pipeline;

[0007] By connecting the flange mounting plates at both ends of the valve body with the pipeline, and since the nut seat is fixed to the valve body through a fixed bracket, when the first hand wheel is turned to rotate the screw, the screw drives the connecting rod and the valve plate at the bottom of the connecting rod to move up and down in the mounting cavity of the valve body, thereby realizing the opening and closing of the pipeline, and at the same time, the regulating mechanism is used to realize throttling of the medium in a complex conveying environment in the pipeline.

[0008] The above technical solutions in the embodiments of the present application have at least the following technical effects:

[0009] 1. The present application is to open a mounting hole on the valve plate, provide a second valve seat on the inner wall of the mounting hole, and provide a valve stem in the vertical direction of the mounting hole. One end of the valve stem is fixedly connected to the inner wall of the bottom end of the mounting hole, and the other end passes through the top of the valve plate. At the same time, the valve stem is coaxially inserted in the screw. When the first hand wheel is rotated, the screw drives the valve plate to move upward with the cooperation of the nut seat on the fixed bracket, thereby realizing full opening and full closing of the pipeline. When the required flow rate of the pipeline medium is low, the worm and the worm gear are engaged by rotating the second hand wheel, and then the valve stem drives the sealing disk to rotate. The medium in the pipeline flows through the mounting hole. The medium in the pipeline is regulated and throttled by adjusting the rotation angle of the sealing disk. The application range is wide.

[0010] 2. The present application provides a sealing suction strip on the side of the first valve seat close to the valve plate. When the valve plate is closed, the sealing suction strip adsorbs the contact surface between the valve plate and the first valve seat under the medium pressure, that is, the sealing surface of the valve plate is pressed toward the first valve seat on the other side by relying on the medium pressure to ensure the sealing of the sealing surface, realize self-sealing, and further enhance the sealing performance of the valve plate and the first valve seat.

[0011] In some embodiments, the regulating mechanism includes a sealing disk, and the regulating mechanism further includes a valve stem and a transmission assembly, wherein the valve stem is coaxially arranged in the mounting cavity of the screw and the connecting rod, one end of the valve stem is rotatably connected to the mounting hole, and the other end is rotatably connected to the mounting box, the valve stem is fixedly connected to the sealing disk, and the transmission assembly is arranged in the mounting box, and the transmission assembly is used to adjust the rotation angle of the sealing disk on the valve plate;

[0012] By adopting the above technical solution, the worm and the worm wheel are meshed and driven by rotating the second hand wheel, so that the valve stem drives the sealing disk to rotate, and the medium in the pipeline flows through the installation hole.

[0013] In some embodiments, the transmission assembly includes:

[0014] a second handwheel, a worm and a worm wheel, wherein the second handwheel is arranged on the outside of the mounting box, a mounting pillow block is provided in the mounting box, the worm is arranged in the cavity of the mounting box through the mounting pillow block, the second handwheel is coaxially fixedly connected to a rotating shaft, an end of the rotating shaft away from the second handwheel is coaxially fixedly connected to the worm, the worm wheel is coaxially fixedly connected to the valve stem, and the worm and worm wheel are meshed for transmission;

[0015] By adopting the above technical solution, when the medium in the pipeline flows through the installation hole, the medium in the pipeline can be regulated and throttled by adjusting the rotation angle of the sealing disk.

[0016] In some embodiments, a mounting hole is formed on the valve plate, a second valve seat is formed on the inner wall of the mounting hole, the outer wall of the sealing disk is closely attached to the second valve seat, and a mounting cavity is coaxially formed in the screw and the connecting rod.

[0017] Optionally, a support frame is movably connected to the first hand wheel, and an installation box is provided at one end of the support frame away from the first hand wheel, wherein a cavity is provided in the installation box;

[0018] By adopting the above technical solution, the installation box is arranged on the valve body through the support frame, which facilitates the installation of the transmission assembly.

[0019] Optionally, an annular limiting groove is provided on the first handwheel and a slider is provided at the bottom of the support frame. When the first handwheel rotates, since the support frame is movably connected to the first handwheel, the slider provided at the bottom of the support frame remains stationary in the limiting groove, making it convenient to adjust the rotation angle of the sealing disk through the transmission assembly, thereby achieving throttling of the medium in the circulation pipeline.

[0020] In some embodiments, a sealing suction strip is provided on the first valve seat;

[0021] By adopting the above technical solution, when the valve plate is closed, the sealing suction strip adsorbs the contact surface between the valve plate and the first valve seat under the medium pressure, that is, the sealing surface of the valve plate is pressed toward the first valve seat on the other side by the medium pressure to ensure the sealing of the sealing surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 A schematic structural diagram of a gate valve provided in an embodiment of the present application;

[0024] Figure 2 A side view of a gate valve provided in an embodiment of the present application;

[0025] Figure 3 for Figure 2 sectional view of

[0026] Figure 4 A schematic diagram of a valve plate structure of a gate valve provided in an embodiment of the present application;

[0027] Figure 5 A schematic diagram of an adjustment mechanism of a gate valve provided in an embodiment of the present application.

[0028] Among them, the reference numerals in the figures are:

[0029] 1. Valve body; 2. Flange mounting plate; 3. First valve seat; 4. Fixing bracket; 5. Nut seat; 6. Screw; 7. First handwheel; 8. Valve plate; 9. Mounting hole; 10. Sealing plate; 11. Valve stem; 12. Mounting box; 13. Support frame; 14. Second handwheel; 15. Worm; 16. Worm gear; 17. Connecting rod; 18. Sealing suction strip. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the accompanying drawings are intended to cover non-exclusive inclusions.

[0032] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0035] In this application, "and / or" is simply a way to describe the relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0036] It should be noted that, in this application, words such as "in this embodiment", "exemplarily", and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in this embodiment", "exemplarily", and "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in this embodiment", "exemplarily", and "for example" is intended to present related concepts in a concrete way, meaning that specific features, structures, or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the above words in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] The gate valve is a type of valve. The opening and closing part of the gate valve is the valve plate. The movement direction of the valve plate is perpendicular to the direction of the medium. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The valve plate has two sealing surfaces. The most commonly used mode is that the two sealing surfaces of the valve plate valve form a wedge shape, and the wedge angle varies with the valve parameters.

[0038] In the related art, the new gate valve achieves a blocking effect by inserting a double-layer valve plate on the diverter plate in the gate body, and the valve plate will not be worn. The provided sealing gasket ensures the absolute sealing of the valve plate, thereby improving the sealing of the gate valve. However, the blocking effect is achieved by inserting a double-layer valve plate on the diverter plate in the gate body. Although the impact on the valve plate is reduced, it affects the full opening of the valve.

[0039] Based on this, in order to improve the problem that the gate valve in the related technology cannot achieve the effect of regulation and throttling and is not suitable for the complex transportation environment in the pipeline, the embodiment of the present application provides the following solution.

[0040] See also Figures 1 to 5 A gate valve includes a valve body 1 and a first valve seat 3. Both ends of the valve body 1 are provided with a flange mounting plate 2. The valve body 1 is provided with a fixing bracket 4. The fixing bracket 4 is provided with a nut seat 5. A valve plate 8 is provided in the valve body 1. A connecting rod 17 is coaxially provided at one end of the screw 6 close to the valve plate 8. The connecting rod 17 is fixedly connected to the valve plate 8. The end of the screw 6 away from the connecting rod 17 is coaxially fixedly connected to a first hand wheel 7. The screw 6 is coaxially arranged with the nut seat 5. An adjusting mechanism is provided on the valve plate 8. The adjusting mechanism is used to achieve throttling of the medium in a complex conveying environment in the pipeline.

[0041] The regulating mechanism includes a sealing disk 10, a valve stem 11 and a transmission assembly. The valve stem 11 is coaxially arranged in the mounting cavity of the screw 6 and the connecting rod 17. One end of the valve stem 11 is rotatably connected to the mounting hole 9, and the other end is rotatably connected to the mounting box 12. The valve stem 11 is fixedly connected to the sealing disk 10. The transmission assembly is arranged in the mounting box 12. The transmission assembly is used to adjust the rotation angle of the sealing disk 10 on the valve plate 8.

[0042] The transmission assembly includes a second handwheel 14, a worm 15 and a worm gear 16. The second handwheel 14 is arranged on the outside of the installation box 12. A mounting pillow block is provided inside the installation box 12. The worm 15 is arranged in the cavity of the installation box 12 through the mounting pillow block. The second handwheel 14 is coaxially fixedly connected to a rotating shaft. The end of the rotating shaft away from the second handwheel 14 is coaxially fixedly connected to the worm 15. The worm gear 16 is coaxially fixedly connected to the valve stem 11. The worm 15 and the worm gear 16 are meshed and driven.

[0043] The effect of this arrangement is that by rotating the second hand wheel 14, the worm 15 and the worm wheel 16 are engaged and transmitted, and then the valve stem 11 drives the sealing disk 10 to rotate, and the medium in the pipeline flows through the mounting hole 9. By adjusting the rotation angle of the sealing disk 10, the medium in the pipeline can be regulated and throttled.

[0044] See also Figure 3 and Figure 4 , a sealing suction strip 18 is provided on the first valve seat 3;

[0045] The effect of this arrangement is that when the valve plate 8 is closed, the sealing suction strip 18 adsorbs the contact surface between the valve plate 8 and the first valve seat 3 under the medium pressure, that is, the sealing surface of the valve plate 8 is pressed toward the first valve seat 3 on the other side by the medium pressure to ensure the sealing of the sealing surface.

[0046] See also Figure 3 and Figure 4 , a mounting hole 9 is opened on the valve plate 8, a second valve seat is provided on the inner wall of the mounting hole 9, the outer wall of the sealing disk 10 is tightly arranged with the second valve seat, and a mounting cavity is coaxially opened in the screw 6 and the connecting rod 17;

[0047] The effect of this arrangement is that a mounting hole 9 is opened on the valve plate 8, a second valve seat is provided on the inner wall of the mounting hole 9, a valve stem 11 is provided in the vertical direction of the mounting hole 9, one end of the valve stem 11 is fixedly connected to the inner wall of the bottom end of the mounting hole 9, and the second hand wheel 14 is rotated to make the valve stem 11 drive the sealing disk 10 to rotate, and the medium in the pipeline flows through the mounting hole 9.

[0048] See also Figure 1 and Figure 2, a support frame 13 is movably connected to the first hand wheel 7, and an installation box 12 is provided at one end of the support frame 13 away from the first hand wheel 7, and a cavity is provided in the installation box 12;

[0049] The effect of such an arrangement is that it facilitates providing an installation location for the transmission assembly and facilitates adjusting the rotation angle of the sealing disk 10 through the transmission assembly, thereby achieving throttling of the medium in the flow pipeline.

[0050] From the above, we can see that the working principle of this application is as follows:

[0051] A mounting hole 9 is opened on the valve plate 8, a second valve seat is provided on the inner wall of the mounting hole 9, and a valve stem 11 is provided in the vertical direction of the mounting hole 9. One end of the valve stem 11 is fixedly connected to the inner wall of the bottom end of the mounting hole 9, and the other end passes through the top of the valve plate 8. At the same time, the valve stem 11 is coaxially inserted in the screw 6 and the connecting rod 17. When the first hand wheel 7 is rotated, the screw 6, in cooperation with the nut seat 5 on the fixed bracket 4, drives the valve plate 8 to move upward, thereby achieving full opening and full closing of the pipeline. When the required flow rate of the pipeline medium is adjusted, the worm 15 and the worm gear 16 are meshed and driven by rotating the second hand wheel 14, so that the valve stem 11 drives the sealing disk 10 to rotate, and the medium in the pipeline circulates through the mounting hole 9. The regulation and throttling of the medium in the pipeline are achieved by adjusting the rotation angle of the sealing disk 10.

[0052] When the valve plate 8 is closed, the sealing suction strip 18 adsorbs the contact surface between the valve plate 8 and the first valve seat 3 under the medium pressure, that is, the sealing surface of the valve plate 8 is pressed toward the first valve seat 3 on the other side by the medium pressure to ensure the sealing of the sealing surface.

[0053] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A gate valve, comprising a valve body (1), a first valve seat (3) and a screw (6), characterized in that: The valve body (1) is provided with a fixed bracket (4), the fixed bracket (4) is provided with a nut seat (5), a valve plate (8) is provided in the valve body (1), a connecting rod (17) is coaxially provided at one end of the screw rod (6) close to the valve plate (8), the connecting rod (17) is fixedly connected to the valve plate (8), the end of the screw rod (6) away from the connecting rod (17) is coaxially fixedly connected to a first hand wheel (7), the screw rod (6) and the nut seat (5) are coaxially arranged, and an adjusting mechanism is provided on the valve plate (8), the adjusting mechanism includes a sealing disk (10) for realizing throttling of the medium in a complex conveying environment in the pipeline.

2. A gate valve according to claim 1, characterized in that: The valve plate (8) is provided with a mounting hole (9), the inner wall of the mounting hole (9) is provided with a second valve seat, the outer wall of the sealing disk (10) is tightly arranged with the second valve seat, and the screw rod (6) and the connecting rod (17) are both coaxially provided with mounting cavities.

3. A gate valve according to claim 1, characterized in that: A support frame (13) is movably connected to the first hand wheel (7), and an installation box (12) is provided at one end of the support frame (13) away from the first hand wheel (7), and a cavity is provided in the installation box (12).

4. A gate valve according to any one of claims 1 to 3, characterized in that: The regulating mechanism also includes: A valve stem (11), the valve stem (11) being coaxially arranged in the mounting cavity of the screw rod (6) and the connecting rod (17), one end of the valve stem (11) being rotatably connected to the mounting hole (9), and the other end of the valve stem (11) being rotatably connected to the mounting box (12), and the valve stem (11) being fixedly connected to the sealing disk (10); A transmission assembly is arranged in a mounting box (12), and is used to adjust the rotation angle of a sealing disk (10) on a valve plate (8).

5. A gate valve according to claim 4, characterized in that: The transmission assembly comprises: A second hand wheel (14) and a worm (15), wherein the second hand wheel (14) is arranged on the outside of the installation box (12), a mounting pillow block is arranged inside the installation box (12), the worm (15) is arranged in the cavity of the installation box (12) through the mounting pillow block, the second hand wheel (14) is coaxially fixedly connected with a rotating shaft, and one end of the rotating shaft away from the second hand wheel (14) is coaxially fixedly connected with the worm (15); A worm wheel (16) is coaxially fixedly connected to the valve stem (11), and the worm (15) and the worm wheel (16) are meshed for transmission.

6. A gate valve according to claim 1, characterized in that: Both ends of the valve body (1) are provided with flange mounting plates (2).

7. A gate valve according to claim 1, characterized in that: A sealing suction strip (18) is provided on the first valve seat (3).

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