Manual gate valve capable of accurately controlling flow

Abstract

The utility model relates to the related field, in particular to a manual gate valve capable of accurately controlling flow, which comprises a valve body, a valve plate, a valve rod, a hand wheel, a connecting pipe, a mounting frame, a hollow disc, a rotating circular plate, a circulating hole, a groove, a worm, worm gear teeth, a rotating wheel, a fixed disc, scale marks, a pointer, a buffer film, a ceramic coating and the like. According to the utility model, the hollow disc and the rotating circular plate are arranged, and the rotating circular plate rotates in the hollow disc, so that the area of the overlapped part of the circulating holes in the hollow disc and the rotating circular plate is adjusted, the area of a medium flowing through the circulating holes is finely adjusted, and the flow control is realized; and the rotating angle of the rotating circular plate can be more accurately calculated through cooperation of the pointer and the scale marks, then the size of the area of the overlapped part of the circulating holes in the hollow disc and the rotating circular plate is calculated, the flow in the gate valve can be further accurately controlled, the gate valve can meet more actual requirements, and the practicability of the gate valve is improved.

Description

Technical Field

[0001] The utility model relates to the field of gate valves, and in particular to a manual gate valve for accurately controlling flow. Background Art

[0002] A gate valve, also known as a disc valve or a gate valve, is a common type of valve, mainly used to regulate the flow of fluids (such as water, oil, gas, etc.) in pipeline systems. Its basic working principle is to control the opening and closing of the channel through a gate (or door plate) that can move up and down. When the gate is lifted upward, it separates from the valve seat, allowing the fluid to pass; when it moves downward, the gate fits tightly against the valve seat, thereby blocking the flow of fluid.

[0003] When in use, the gate valve is mainly used to connect or cut off the medium in the pipeline. It is difficult to control the flow rate very well. In some situations where there is a temporary flow adjustment demand or an emergency, a gate valve that is difficult to control the flow rate is difficult to meet actual needs and easily reduces the practicality of the gate valve. Summary of the invention

[0004] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a manual gate valve for accurately controlling flow to solve the above-mentioned technical problems.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a manual gate valve for accurately controlling flow, comprising a valve body, a valve plate slidably installed in the valve body, a valve stem inserted into the valve plate and threadedly connected thereto, a connecting pipe is arranged at each of the left and right ends of the valve body, the valve stem is rotatably installed in the valve body, and the valve stem is connected to the hand wheel above the valve body after moving through the inner side of the valve body, a mounting frame is fixedly installed in the connecting pipe near the water inlet end of the valve body, a hollow disk is fixedly installed on the mounting frame, a rotating circular plate is rotatably installed in the hollow disk, and a groove is provided on the inner top of the hollow disk;

[0006] The rotating circular plate and the hollow disk are both provided with flow holes, and the flow holes on the rotating circular plate and the hollow disk are interconnected;

[0007] A worm is rotated in the groove, the worm is meshed with the worm gear teeth arranged on the rotating circular plate, and the worm moves through the hollow disk and the side surface of the connecting pipe;

[0008] The movable sleeve on the worm is provided with a fixed disk connected with the connecting pipe, the side surface of the worm is installed with a pointer located at the rear end of the fixed disk, and the rear end surface of the fixed disk is provided with scale lines.

[0009] Preferably, a buffer film is pasted on the mounting frame, and the buffer film is in contact with the side surface of the hollow disk.

[0010] Preferably, the inner circle of the flow hole is coated with a ceramic coating.

[0011] Preferably, a rotating wheel is fixedly mounted on the rear end of the worm.

[0012] Preferably, the distribution length of the worm gear teeth on the rotating circular plate is smaller than the inner length of the groove.

[0013] Preferably, the left and right sides of the valve plate are inclined surfaces that taper from top to bottom.

[0014] Beneficial effects of the utility model:

[0015] The utility model provides a hollow disk and a rotating circular plate, and the rotating circular plate rotates in the hollow disk, thereby adjusting the area of ​​the overlapping portion of the flow holes on the hollow disk and the rotating circular plate, so as to fine-tune the area of ​​the medium flowing through the flow holes, thereby realizing flow control. The rotation angle of the rotating circular plate can be more accurately calculated by a pointer in conjunction with a scale line, and then the size of the overlapping portion of the flow holes on the hollow disk and the rotating circular plate can be calculated, which helps to further accurately control the flow in the gate valve, helps the gate valve meet more practical needs, and improves the practicality of the gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the side view connection structure of the hollow disk of the utility model;

[0018] Figure 3 It is a schematic diagram of the scale line distribution structure of the utility model.

[0019] Among them: valve body-1, valve plate-2, valve stem-3, hand wheel-4, connecting pipe-5, mounting frame-6, hollow disk-7, rotating circular plate-8, flow hole-9, groove-10, worm-11, worm gear teeth-12, rotating wheel-13, fixed disk-14, scale line-15, pointer-16, buffer film-17, ceramic coating-18. DETAILED DESCRIPTION

[0020] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0021] like Figure 1 As shown, the utility model provides a manual gate valve for accurately controlling flow, comprising a valve body 1, a valve plate 2 slidably mounted in the valve body 1, the valve plate 2 can move vertically up and down along the inner side of the valve body 1, a valve stem 3 inserted into the valve plate 2 and threadedly connected thereto, a connecting pipe 5 is respectively arranged at the left and right ends of the valve body 1, the valve stem 3 is rotatably mounted in the valve body 1, the valve stem 3 can rotate horizontally in the valve body 1, and the valve stem 3 is connected to a hand wheel 4 above the valve body 1 after moving through the inner side of the valve body 1, so that the valve stem 3 can be driven to rotate horizontally by the hand wheel 4;

[0022] In this embodiment, the left and right sides of the valve plate 2 are inclined surfaces that taper from top to bottom. The inclined surface design of the side surface of the valve plate 2 can optimize the flow direction of the fluid when passing through the gate valve and reduce the generation of eddy currents and turbulence.

[0023] Specifically, when in use, it can be connected to an external medium delivery pipeline through a connecting pipe 5 to realize the gate valve connecting pipeline. When the gate valve needs to be controlled, the valve stem 3 can be driven to rotate by manually operating the hand wheel 4, and the valve stem 3 drives the valve plate 2 to move vertically up and down in the valve body 1. When the valve plate 2 moves upward, the gate valve opens to allow the medium to pass through. When the valve plate 2 moves downward and fits against the bottom inner side of the valve body 1, the gate valve closes, and the medium is not allowed to pass through.

[0024] like Figures 1 to 3 As shown, in this embodiment, a mounting frame 6 is fixedly installed in the connecting pipe 5 near the water inlet end of the valve body 1, and a hollow disk 7 is locked and fixed on the mounting frame 6. A rotating circular plate 8 is rotatably installed in the hollow disk 7. The rotating circular plate 8 can rotate vertically in the hollow disk 7, and a groove 10 is opened on the inner top of the hollow disk 7;

[0025] The rotating circular plate 8 and the hollow disk 7 are both provided with flow holes 9, the flow holes 9 on the rotating circular plate 8 and the hollow disk 7 are interconnected, and the flow holes 9 are used to transport the medium;

[0026] A worm 11 rotates in the groove 10, and the worm 11 meshes with the worm gear 12 provided on the top of the rotating circular plate 8, so that the circular rotating plate 8 can be driven to rotate in the hollow disk 7 by the worm 11 and the worm gear 12. The worm 11 moves horizontally through the side surfaces of the hollow disk 7 and the connecting pipe 5.

[0027] The movable sleeve on the worm 11 is provided with a fixed disk 14 connected to the rear end surface of the connecting tube 5, and a pointer 16 located at the rear end of the fixed disk 14 is vertically installed on the side surface of the worm 11, and a plurality of circular scale lines 15 equidistantly distributed on the rear end surface of the fixed disk 14 are provided;

[0028] In this embodiment, a buffer film 17 is attached to the mounting frame 6, and the buffer film 17 is in contact with the side surface of the hollow plate 7 to provide a buffer for the hollow plate 7 and improve the stability of the hollow plate 7 when in use;

[0029] In this embodiment, the inner ring of the flow hole 9 is coated with a ceramic coating 18. The ceramic coating 18 in this embodiment is an alumina ceramic coating, which can provide excellent anti-adhesion and corrosion resistance for the inner ring of the flow hole 9.

[0030] In this embodiment, a rotating wheel 13 is fixedly mounted at the rear end of the worm 11, so as to drive the worm 11 to rotate through the rotating wheel 13;

[0031] Among them, the distribution length of the worm gear teeth 12 on the rotating circular plate 8 is smaller than the inner length of the groove 10, so that the worm gear teeth 12 can move in the groove 10 easily;

[0032] Specifically, when the flow rate in the gate valve needs to be adjusted, the rotating wheel 13 can be manually turned, and the rotating wheel 13 drives the worm 11 to rotate. The worm 11 cooperates with the worm gear 12 to drive the rotating circular plate 8 to rotate, and the rotating circular plate 8 drives the flow holes 9 set on its outer surface to rotate, thereby adjusting the overlapping area of ​​the rotating circular plate 8 and the flow holes 9 on the hollow disk 7 to adjust the area of ​​the medium flowing through the flow holes 9, thereby achieving control of the flow rate flowing through the gate valve, and when the rotating wheel 13 rotates, it drives the pointer 16 to rotate synchronously. The pointer 16 cooperates with the scale line 15 to more accurately calculate the rotation angle of the rotating circular plate 8, and then calculate the size of the overlapping area of ​​the flow holes 9 on the hollow disk 7 and the rotating circular plate 8, which helps to further accurately control the flow rate in the gate valve.

[0033] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A manual gate valve for precise flow control, comprising a valve body, a valve plate slidably mounted in the valve body, a valve stem inserted into the valve plate and threadedly connected thereto, a connecting pipe being arranged at each of the left and right ends of the valve body, the valve stem being rotatably mounted in the valve body, and the valve stem being movable through the inner side of the valve body and connected to a hand wheel above the valve body; It is characterized in that A mounting frame is fixedly installed in the connecting pipe near the water inlet end of the valve body, a hollow disk is fixedly installed on the mounting frame, a rotating circular plate is rotatably installed in the hollow disk, and a groove is opened on the inner top of the hollow disk; The rotating circular plate and the hollow disk are both provided with flow holes, and the flow holes on the rotating circular plate and the hollow disk are interconnected; A worm is rotated in the groove, the worm is meshed with the worm gear teeth arranged on the rotating circular plate, and the worm moves through the hollow disk and the side surface of the connecting pipe; The movable sleeve on the worm is provided with a fixed disk connected with the connecting pipe, the side surface of the worm is installed with a pointer located at the rear end of the fixed disk, and the rear end surface of the fixed disk is provided with scale lines.

2. A manual gate valve for accurately controlling flow according to claim 1, characterized in that: A buffering film is pasted on the mounting frame, and the buffering film is in contact with the side surface of the hollow disk.

3. A manual gate valve for accurately controlling flow according to claim 1, characterized in that: The inner circle of the flow hole is coated with a ceramic coating.

4. A manual gate valve for accurately controlling flow according to claim 1, characterized in that: A rotating wheel is fixedly mounted on the rear end of the worm.

5. A manual gate valve for accurately controlling flow according to claim 1, characterized in that: The distribution length of the worm gear teeth on the rotating circular plate is smaller than the inner length of the groove.

6. A manual gate valve for accurately controlling flow according to claim 1, characterized in that: The left and right sides of the valve plate are in the shape of inclined surfaces which gradually decrease from top to bottom.

Images