Pneumatic cut-off adjusting butterfly valve

Abstract

The utility model belongs to the field of pneumatic butterfly valves, and particularly relates to a pneumatic cut-off adjusting butterfly valve which comprises a valve body, a valve rod fixing seat is arranged at the top of the valve body, a valve rod is rotatably arranged in the valve rod fixing seat, a gear transmission box is arranged above the valve rod fixing seat, a gear is rotatably arranged in the gear transmission box, and the gear is fixedly connected with the top of the valve rod. A first rack and a second rack are in meshed connection with the two sides of the gear correspondingly, a limiting sliding block is slidably arranged on one side of the first rack, a first pneumatic pushing assembly and a second pneumatic pushing assembly are arranged on one side of the gear transmission box correspondingly, and the output end of the first pneumatic pushing assembly is fixedly connected with one end of the first rack; the output end of the second pneumatic pushing assembly is fixedly connected with one end of the second rack. Through the arrangement of structures such as the limiting sliding block, the limiting sliding block can be driven to horizontally move by rotating the screw rod, and the limiting sliding block limits the movement of the second rack, so that the rotating angle of the valve plate is changed.

Description

Technical Field

[0001] The utility model belongs to the technical field of pneumatic butterfly valves, in particular to a pneumatic cut-off regulating butterfly valve. Background Art

[0002] Pneumatic butterfly valve is composed of pneumatic actuator and valve body. Pneumatic butterfly valve is a pneumatic valve that uses a circular butterfly plate that rotates with the valve stem to open and close to realize the activation action. It is mainly used as a shut-off valve, and can also be designed to have the function of regulation or section valve and regulation. Butterfly valves are increasingly used in low-pressure large and medium-diameter pipelines. This feature of pneumatic butterfly valves is particularly significant. They are installed in high-altitude dark passages and are easy to operate through the control of a two-position five-way solenoid valve. Butterfly valves are increasingly used in low-pressure large and medium-diameter pipelines.

[0003] When the cam is in the air, the cam is in the air, and the push-pull mechanism is turned on the fly, and the push-pull mechanism is turned on the air-conditioner the upper and lower ends of the cam, and the push-pull mechanism is turned on the air-conditioner the lower end.

[0004] In the prior art, a spring is set, and when the power is off, the pneumatic mechanism cannot drive the push plate and the rack to close the valve plate. At this time, the spring drives the push plate and the rack to close the valve plate through its own elastic tension. However, there are still some shortcomings: First, the existing butterfly valve provides power for closing the valve plate through the tension of the spring itself, and as the working time of the spring increases, its own elastic tension will gradually decrease, so that the kinetic energy it provides for closing the valve plate becomes smaller and smaller, making it impossible for the spring to effectively close the valve plate, affecting the normal operation of the butterfly valve.

[0005] Moreover, the existing pneumatic regulating butterfly valve cannot adjust the butterfly valve flow rate according to demand, thereby reducing the practicality of the butterfly valve. Utility Model Content

[0006] To overcome the shortcomings of the prior art, the present invention provides a pneumatic shut-off regulating butterfly valve. The present invention utilizes a limit slider and a screw structure to enable the limit slider to move horizontally by rotating the screw. The movement of the limit slider changes the distance between the limit slider and the second rack, thereby changing the rotation angle of the valve plate when the second rack drives the gear transmission box to rotate. The limit slider also supports one end of the second rack and drives the second rack to move horizontally. The second rack drives the gear transmission box to rotate, thereby closing the butterfly valve.

[0007] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pneumatic cut-off regulating butterfly valve, comprising a valve body, a valve stem fixing seat is provided on the top of the valve body, a valve stem is rotatably provided inside the valve stem fixing seat, a gear transmission box is provided above the valve stem fixing seat, a gear is rotatably provided inside the gear transmission box, the gear is fixedly connected to the top of the valve stem, a first rack and a second rack are respectively meshed and connected on both sides of the gear, a limiting slider is slidably provided on one side of the first rack, a first pneumatic pushing component and a second pneumatic pushing component are respectively provided on one side of the gear transmission box, the output end of the first pneumatic pushing component is fixedly connected to one end of the first rack, and the output end of the second pneumatic pushing component is fixedly connected to one end of the second rack.

[0008] Optionally, a screw is rotatably provided inside a side wall of one side of the gear transmission box, and one end of the screw is rotatably connected to one side of the limiting slider.

[0009] Optionally, a rotation groove is provided on one side of the limiting sliding block, a rotation block is rotatably provided inside the rotation groove, and a side wall of the rotation block is fixedly connected to one end of the screw rod.

[0010] Optionally, fixing plates are provided at upper and lower ends of the first rack and the second rack.

[0011] Optionally, the first pneumatic propulsion assembly includes a first cylinder body arranged on one side of the gear transmission box, a first piston is slidably arranged inside the first cylinder body, and one side surface of the first piston is fixedly connected to one end of the first rack.

[0012] Optionally, a connecting pipe is provided at the bottom of the first cylinder body and the second cylinder body.

[0013] Optionally, fixing hoops are provided on the outer sides of the first cylinder body and the second cylinder body, and a fixing rod is connected between the first cylinder body and the fixing hoops provided on the first piston.

[0014] In summary, compared with the prior art, the beneficial effects of this solution are:

[0015] (1) The utility model provides a limit slider and a screw structure, so that the limit slider can be driven to move horizontally by rotating the screw. The movement of the limit slider causes the distance between the limit slider and the second rack to change, thereby causing the valve plate rotation angle to change when the second rack drives the gear transmission box to rotate, thereby changing the flow rate through the butterfly valve;

[0016] (2) The utility model uses the limit slider and the screw lamp structure to make it so that when the power is off, the external air source cannot push the first rack to close the butterfly valve. At this time, the screw can be rotated to drive the limit slider to move horizontally. The limit slider supports one end of the second rack and drives the second rack to move horizontally. The second rack drives the gear transmission box to rotate, thereby closing the butterfly valve, effectively preventing the butterfly valve from being unable to close during a power outage.

[0017] (3) The utility model provides a connecting pipe and other structures so that when the first pneumatic pushing component pushes the first rack, the gas below the first piston in the first cylinder body flows to the inside of the second cylinder body through the connecting pipe, thereby pushing one end of the second piston, thereby reducing the external air pressure required for closing the butterfly valve. Similarly, when the butterfly valve is opened, the air pressure required for opening can be effectively reduced, thereby saving the energy required for opening and closing the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the utility model;

[0019] Figure 2 The main view of the utility model;

[0020] Figure 3 for Figure 2 A three-dimensional cross-section at AA in the middle;

[0021] Figure 4 for Figure 2 A three-dimensional cross-sectional view of the middle BB;

[0022] Figure 5 for Figure 3 A partial enlarged view of point C in the middle;

[0023] Figure 6 for Figure 4 A partial enlarged view of point D in the middle.

[0024] In the figure: valve body 10, valve stem fixing seat 11, valve stem 12, gear transmission box 13, gear 14, first rack 15, second rack 16, first cylinder body 17, first piston 18, second cylinder body 19, second piston 20, connecting pipe 21, fixing hoop 22, fixing rod 23, fixing plate 24, limiting slider 25, screw 26, rotating groove 27, rotating block 28, rotating disk 29. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] Example 1:

[0027] like Figure 1 、 Figure 2 、 Figure 3 and Figure 5 As shown, a pneumatic cut-off regulating butterfly valve includes a valve body 10, a valve stem fixing seat 11 is provided on the top of the valve body 10, a valve stem 12 is rotatably provided inside the valve stem fixing seat 11, a gear transmission box 13 is provided above the valve stem fixing seat 11, a gear 14 is rotatably provided inside the gear transmission box 13, the gear 14 is fixedly connected to the top of the valve stem 12, a first rack 15 and a second rack 16 are respectively meshed and connected on both sides of the gear 14, a limiting slider 25 is slidably provided on one side of the second rack 16, a first pneumatic push component and a second pneumatic push component are respectively provided on one side of the gear transmission box 13, the output end of the first pneumatic push component is fixedly connected to one end of the first rack 15, and the output end of the second pneumatic push component is fixedly connected to one end of the second rack 16.

[0028] Specifically, the first pneumatic push component is started to drive the first rack 15 to close the butterfly valve, and the second pneumatic push component is started to drive one end of the second rack 16 to open the butterfly valve. The limit slider 25 is set on one side of the second rack 16. The distance between the second rack 16 and the limit slider 25 is controlled by moving the limit slider 25, so that the second rack 16 drives the gear 14 to rotate, and the angle of rotation of the gear 14 is changed to control the opening angle of the valve plate of the butterfly valve, thereby controlling the flow rate of the butterfly valve, and by controlling the limit slider 25 to move toward the second pneumatic push component, the second rack 16 can be driven to move horizontally toward the second pneumatic push component. The second rack 16 drives the gear 14 to rotate, thereby realizing the closure of the valve, so that the butterfly valve can still be closed in the case of power failure.

[0029] Further, such as Figure 4 and Figure 6 As shown, fixing plates 24 are provided at the upper and lower ends of the first rack 15 and the second rack 16 .

[0030] Specifically, multiple fixed plates 24 cooperate to form sliding tracks for the first rack 15, the second rack 16 and the limiting slider 25, which limit the first rack 15, the second rack 16 and the limiting slider 25, and effectively prevent the first rack 15, the second rack 16 and the limiting slider 25 from being displaced during operation, causing damage to the device.

[0031] Further, such as Figure 3 As shown, the first pneumatic pushing component includes a first cylinder body 17 arranged on one side of the gear transmission box 13, and a first piston 18 is slidably arranged inside the first cylinder body 17, and one side surface of the first piston 18 is fixedly connected to one end of the first rack 15. The second pneumatic pushing component includes a second cylinder body 19 arranged on one side of the gear transmission box 13, and a second piston 20 is slidably arranged inside the second cylinder body 19, and one side surface of the second piston 20 is fixedly connected to one end of the second rack 16.

[0032] Specifically, the first cylinder body 17 and the second cylinder body 19 are inflated by an external air source, and the air pressure inside the first cylinder body 17 and the second cylinder body 19 increases, forming a supporting force on one side of the first piston 18 and the second piston 20, thereby driving the first rack 15 and the second rack 16 connected to the first piston 18 and the second piston 20 respectively to move, thereby forming the opening and closing of the butterfly valve.

[0033] Furthermore, as shown in the figures and the drawings, a connecting pipe 21 is provided at the bottom of the first cylinder body 17 and the bottom of the second cylinder body 19.

[0034] Specifically, the setting of the connecting pipe 21 enables the external air source to inflate one of the first cylinder body 17 and the second cylinder body 19, and the atmospheric pressure will drive the first piston 18 and the second piston 20 sliding in the first cylinder body 17 and the second cylinder body 19 to move. When moving, the first piston 18 and the second piston 20 will compress the air inside the first cylinder body 17 and the second cylinder body 19 on the other side. Through the setting of the connecting pipe 21, this part of the air can be filled into the other cylinder, forming a thrust on the other piston, effectively helping to open or close the butterfly valve, and saving the air pressure required to open and close the butterfly valve.

[0035] Further, such as Figure 1 and Figure 3 As shown, a fixing hoop 22 is provided on the outer side of the first cylinder body 17 and the second cylinder body 19 , and a fixing rod 23 is connected between the fixing hoop 22 provided on the first cylinder body 17 and the first piston 18 .

[0036] Specifically, the provision of the fixing hoop 22 and the fixing rod 23 further reinforces the first cylinder body 17 and the second cylinder body 19, thereby effectively improving the strength of the device.

[0037] Further, such as Figure 5As shown, a screw 26 is rotatably provided inside the side wall of one side of the gear transmission box 13, one end of the screw 26 is rotatably connected to one side of the limit slider 25, and a rotating disk 29 is provided at the other end of the screw 26. A rotating groove 27 is provided on one side of the limit slider 25, and a rotating block 28 is rotatably provided inside the rotating groove 27, and one side wall of the rotating block 28 is fixedly connected to one end of the screw 26.

[0038] Specifically, the screw rod 26 is threadedly connected to the side wall of the gear transmission box 13 , and the limit slider 25 is driven to move horizontally by rotating the screw rod 26 . The setting of the rotating disk 29 makes it easier for workers to rotate the screw rod 26 .

[0039] First, when closing the butterfly valve, it is only necessary to inflate the interior of the first cylinder body 17, and under the action of air pressure, the first piston 18 is driven to move, the first piston 18 drives the first rack 15 to move, and the first rack 15 drives the gear 14 to rotate. During this process, the gas on the other side of the first piston 18 flows into the interior of the second cylinder body 19 through the connecting pipe 21, forming a thrust on one side of the second piston 20, effectively assisting the closing of the butterfly valve.

[0040] When opening the valve again, it is necessary to inflate the interior of the second cylinder body 19. Under the action of air pressure, the second piston 20 is driven to move horizontally, driving the relevant connecting parts to work, thereby opening the butterfly valve. Similarly, through the setting of the connecting pipe 21, the air pressure required to open the butterfly valve is smaller.

[0041] When the power is off or the external air source equipment is damaged, the rotating disk 29 is rotated, and the rotating disk 29 drives the screw 26 to rotate, and the screw 26 drives the limit slider 25 to move horizontally. One end of the limit slider 25 forms a support for one end of the second rack 16, and drives the second rack 16 to move horizontally. The second rack 16 drives the gear 14 to rotate, forming a closure of the butterfly valve.

[0042] By controlling the relative position of the limit slider 25 and one end of the second rack 16, the horizontal movement distance of the second rack 16 when the butterfly valve is opened is controlled, and then the rotation angle of the gear 14 is controlled, so that the rotation angle of the valve plate of the butterfly valve is controlled, effectively changing the flow rate of the butterfly valve.

[0043] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of the components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0044] It should be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or system. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of other identical elements in the product or system comprising the element.

[0045] The above description shows and describes several preferred embodiments of the present application. However, as previously mentioned, it should be understood that the present application is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present application can be used in various other combinations, modifications, and environments and can be modified within the scope of the application concept described herein through the above teachings or technology or knowledge in the relevant field. Modifications and changes made by those skilled in the art that do not depart from the spirit and scope of the present application should be protected by the claims appended hereto.

Claims

1. A pneumatic shut-off regulating butterfly valve, comprising a valve body (10), a valve stem fixing seat (11) being provided on the top of the valve body (10), a valve stem (12) being rotatably provided inside the valve stem fixing seat (11), characterized in that: A gear transmission box (13) is provided above the valve stem fixing seat (11), and a gear (14) is rotatably provided inside the gear transmission box (13). The gear (14) is fixedly connected to the top of the valve stem (12), and a first rack (15) and a second rack (16) are respectively meshed and connected on both sides of the gear (14). A limiting slider (25) is slidably provided on one side of the second rack (16). A first pneumatic propulsion component and a second pneumatic propulsion component are respectively provided on one side of the gear transmission box (13), and the output end of the first pneumatic propulsion component is fixedly connected to one end of the first rack (15), and the output end of the second pneumatic propulsion component is fixedly connected to one end of the second rack (16).

2. A pneumatic cut-off regulating butterfly valve according to claim 1, characterized in that: A screw rod (26) is rotatably provided inside a side wall of one side of the gear transmission box (13), and one end of the screw rod (26) is rotatably connected to one side of the limiting slider (25).

3. A pneumatic cut-off regulating butterfly valve according to claim 2, characterized in that: A rotation groove (27) is provided on one side of the limiting sliding block (25), a rotation block (28) is rotatably provided inside the rotation groove (27), and a side wall of the rotation block (28) is fixedly connected to one end of the screw rod (26).

4. The pneumatic shut-off regulating butterfly valve according to claim 1, characterized in that: Fixed plates (24) are provided at the upper and lower ends of the first rack (15) and the second rack (16).

5. The pneumatic shut-off regulating butterfly valve according to claim 1, characterized in that: The first pneumatic propulsion assembly includes a first cylinder body (17) arranged on one side of the gear transmission box (13), a first piston (18) is slidably arranged inside the first cylinder body (17), and a side surface of the first piston (18) is fixedly connected to one end of the first rack (15).

6. The pneumatic shut-off regulating butterfly valve according to claim 5, characterized in that: The second pneumatic propulsion assembly includes a second cylinder body (19) arranged on one side of the gear transmission box (13), a second piston (20) is slidably arranged inside the second cylinder body (19), and a side surface of the second piston (20) is fixedly connected to one end of the second rack (16).

7. The pneumatic shut-off regulating butterfly valve according to claim 6, characterized in that: A connecting pipe (21) is provided at the bottom of the first cylinder body (17) and the bottom of the second cylinder body (19) so as to communicate with each other.

8. The pneumatic shut-off regulating butterfly valve according to claim 7, characterized in that: The outer sides of the first cylinder body (17) and the second cylinder body (19) are both provided with fixing hoops (22), and a fixing rod (23) is connected between the first cylinder body (17) and the fixing hoops (22) provided on the first piston (18).

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