Manual gate valve opening indicating mechanism

Abstract

The utility model relates to the technical field of manual gate valves, in particular to an opening indicating mechanism of a manual gate valve, which is characterized in that a rotating nut is mounted in a flange seat, and a gear ring is mounted on an outer ring; a flange seat notch is formed in the side face of the flange seat, and the gear ring part of the rotating nut is exposed out of the notch. The flange seat is connected with the valve body through the support, the lifting screw is connected with the valve plate, the lifting screw penetrates through an inner hole of the rotating nut, the rotating nut rotates to drive the lifting screw to move up and down, and then the valve plate is controlled to be opened and closed. A mounting frame is fixed to one side of the support, a screw shaft is arranged on the mounting frame, a gear is mounted on the screw shaft, and the gear is meshed with an outer gear ring of the rotating nut; the screw shaft is in threaded connection with a base of the base pointer, and the screw shaft rotates to drive the base pointer to move up and down. According to the device, the opening degree of the valve is visually displayed in a limited space by utilizing mutual conversion between rotary motion and linear motion. And over-pressure damage of the valve sleeve or improper valve closing caused by manual misoperation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of manual gate valves, in particular to an opening indicating mechanism of a manual gate valve. Background Art

[0002] The gate valve is an on-off valve, and the movement direction of the gate is perpendicular to the direction of the fluid. Common valve power mechanisms are divided into pneumatic and electric automatic control methods and manual control methods of rotating handwheels.

[0003] Electric and pneumatic automatic control methods can indirectly determine the valve opening by detecting the number of motor revolutions, travel switches, or the position of the pneumatic push rod, but manual control mainly relies on experience to determine the valve opening.

[0004] At present, manual gate valves are often used in industrial pipelines. Since the valves are connected to the pipeline flanges, it is difficult to judge the position of the valve plate from the appearance during operation, which can easily lead to misoperation or damage to the valve. In addition, some industrial pipelines can adjust the opening of the valve according to the properties of the medium to meet the requirements of the system operation. Since there is no way to judge the opening of the valve, it is difficult to adjust it. When the valve is damaged, maintenance must stop production and cause losses.

[0005] To this end, the present application designs a manual gate valve opening indication mechanism to solve the above-mentioned problem. Utility Model Content

[0006] In order to make up for the deficiencies in the prior art, the utility model provides a manual gate valve opening indicating mechanism.

[0007] A manual gate valve opening indicating mechanism, comprising a bracket, a flange seat, a rotating nut, a screw shaft, a gear, a mounting frame, a seat pointer, a scale, a lifting screw, a valve plate, etc., characterized in that:

[0008] The rotating nut is installed in the flange seat, and the upper and lower shaft shoulders are equipped with thrust ball bearings. The rotating nut has screw threads inside and a gear ring is installed on the outer ring.

[0009] A notch is provided on the side of the flange seat to expose the gear ring part of the rotating nut.

[0010] The flange seat is connected to the valve body through a bracket, the lifting screw is connected to the valve plate, the lifting screw passes through the inner hole of the rotating nut, and the rotation of the rotating nut can drive the lifting screw to move up and down, thereby controlling the opening and closing of the valve plate.

[0011] The gear is mounted on the mounting frame through the screw shaft, the gear is meshed with the outer gear ring of the rotating nut, and is fixed on the bracket through the mounting frame.

[0012] The base of the seated pointer has a threaded hole, which is installed on the screw shaft. The gear drives the screw shaft to rotate, and then drives the seated pointer to move up and down through the thread.

[0013] Furthermore, a vertical guide groove is provided on the mounting frame to ensure that the pointer with seat moves up and down in the groove.

[0014] Furthermore, a scale is marked with an opening indication of 0%-100%, which is fixed on one side of the mounting frame. The arrow indication of the seat pointer indirectly reflects the movement position of the valve plate and displays the opening.

[0015] The beneficial effects of the utility model are:

[0016] The device of the utility model utilizes the mutual conversion of rotary motion and linear motion to visually display the valve opening in a limited space, thereby avoiding the overpressure damage of the valve sleeve or the incomplete closing of the valve caused by human misoperation, and ensuring production safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a main schematic diagram of the utility model;

[0018] Figure 2 It is a side cross-sectional schematic diagram of the utility model;

[0019] Figure 3 It is a schematic diagram of the axial side of the utility model.

[0020] In the figure,

[0021] 1. Rotating nut, 2. Screw shaft, 3. Gear, 4. Mounting frame, 5. Pointer with seat, 6. Ruler, 7. Bracket, 8. Flange seat, 9. Lifting screw, 10. Valve plate, 801, Flange seat notch. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0024] Figure 1-Figure 3This is a specific embodiment of the utility model, which is a manual gate valve opening indication mechanism. The rotating nut 1 is installed in the flange seat 8. The upper and lower shoulders are equipped with thrust ball bearings. There are screw threads in the rotating nut 1, and the outer ring is equipped with a gear ring. The side of the flange seat 8 is provided with a flange seat notch 801, and the gear ring part of the rotating nut 1 is exposed at the notch. The flange seat 8 is connected to the valve body necklace through the bracket 7, and the lifting screw 9 is connected to the valve plate 10. The lifting screw 9 passes through the inner hole of the rotating nut 1. The rotation of the rotating nut 1 can drive the lifting screw 9 to move up and down, thereby controlling the opening and closing of the valve plate. A mounting frame 4 is fixed on one side of the bracket 7, and a screw shaft 2 is provided on the mounting frame 4. A gear 3 is installed on the screw shaft 2, and the gear 3 is meshed with the outer ring gear of the rotating nut 1; the screw shaft 2 is threadedly connected to the base of the seat pointer 5, and the rotation of the screw shaft 2 drives the seat pointer 5 to move up and down. The specific usage is:

[0025] The rotating nut 1 is installed in the flange seat 8. The rotation of the rotating nut 1 is controlled by a hand wheel. The rotating nut 1 is threadedly connected to the lifting screw 9 to convert the rotating motion into the up and down movement of the lifting screw 9, thereby driving the valve plate to open and close up and down, thereby realizing the opening and closing of the gate valve.

[0026] The gear 3 is mounted on the mounting frame 4 through the screw shaft 2, and a scale 6 is mounted on the outside. The mounting frame 4 is fixed on the bracket 7 of the gate valve. The gear 3 is meshed with the outer gear ring of the rotating nut 1 at the notch 801 of the flange seat 8. When the rotating nut 1 rotates to drive the lifting screw 9 to rise and fall, it also drives the gear 3 to rotate, thereby driving the screw shaft 2 to rotate.

[0027] The seat pointer 5 threadedly engaged with the screw shaft 2 also moves up and down along the screw shaft 2. The seat pointer 5 is located in the guide groove of the mounting bracket 4 to ensure that the seat pointer 5 can only move up and down, always indicating the reading on the scale 6, indirectly reflecting the moving position of the valve plate 10, thereby displaying the opening.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A manual gate valve opening indication mechanism, comprising a rotating nut (1), characterized in that: The rotating nut (1) is installed in the flange seat (8), and the upper and lower shaft shoulders are provided with thrust ball bearings. The rotating nut (1) has screw threads inside and a gear ring is installed on the outer ring. The side of the flange seat (8) is provided with a flange seat notch (801), and the gear ring part of the rotating nut (1) is exposed at the notch. The flange seat (8) is connected to the valve body necklace through the bracket (7), and the lifting screw (9) is connected to the valve plate (10). The lifting screw (9) passes through the inner hole of the rotating nut (1). The rotation of the rotating nut (1) can drive the lifting screw (9) to move up and down, thereby controlling the opening and closing of the valve plate. A mounting frame (4) is fixed on one side of the bracket (7), and a screw shaft (2) is provided on the mounting frame (4). A gear (3) is installed on the screw shaft (2), and the gear (3) is meshed with the outer ring gear of the rotating nut (1); the screw shaft (2) is threadedly connected to the base of the seat pointer (5), and the rotation of the screw shaft (2) drives the seat pointer (5) to move up and down.

2. The manual gate valve opening indicating mechanism according to claim 1 is characterized in that: The mounting frame (4) is provided with a vertical guide groove, and the seat pointer (5) moves up and down in the groove.

3. The manual gate valve opening indicating mechanism according to claim 2 is characterized in that: A scale (6) is provided on one side of the vertical guide groove of the mounting frame (4), and the scale (6) has an opening indication of 0%-100%, and indirectly reflects the movement position of the valve plate and displays the opening through the arrow indication of the seat pointer.

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