Throttling device for valve

Abstract

The utility model discloses a throttling device for a valve, relates to the technical field of valves, and aims to reduce the installation cost, simplify the installation process and flexibly adjust whether to operate or not. A through hole penetrating through the inside and the outside is formed in the inner wall of the flow channel and covered with a cover plate, and the cover plate is rotationally connected with the valve body. A bottom frame is further fixedly installed on the valve body, an inner cavity communicated with the through hole is formed in the bottom frame, and a control mechanism for controlling the cover plate to be turned up towards the interior of the flow channel is installed on the bottom frame. The cover plate is turned up through the control mechanism, so that the effective sectional area of the flow channel is changed, the flow of fluid is controlled, and the actual flow capacity of the flow channel is reduced; therefore, the throttling degree is quickly adjusted according to actual requirements, and the flexibility and adaptability of the system are improved; due to the fact that a simple mechanical structure is adopted and is directly and integrally formed with a valve of an original pipeline, installation is easier and faster, cost is low, and the throttling valve is suitable for throttling scenes with low requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a throttling device for valves. Background Art

[0002] In the process of industrial production, the transportation of fluids often needs to be controlled through a pipeline system. Especially in industries such as chemical engineering, petroleum, and natural gas, the control of fluid pressure, temperature, and flow rate is particularly important. To achieve this goal, devices such as throttle valves and regulating valves are usually installed in the pipeline to achieve the required flow control effect. However, the installation of these control valves in the pipeline is costly and only applicable to high-demand application scenarios. Moreover, adding valves to the pipeline usually requires professional technicians, and the installation process may involve processes such as welding and flange connection, which not only increases the installation cost but also extends the installation period. In addition, once such valves are installed, it is difficult to cancel their configuration, and the throttling effect is always generated, which limits the flexibility and adaptability of the pipeline system. Summary of the Invention

[0003] Objective of the utility model: To overcome the defects of the prior art, the utility model provides a throttling device for valves, which aims to reduce the installation cost, simplify the installation process, and enable flexible adjustment of whether it operates.

[0004] Technical solution of the utility model: It includes a valve body. A flow channel is opened in the valve body. Through holes penetrating inside and outside are opened on the inner wall of the flow channel. A cover plate covers the through holes, and the cover plate is rotatably connected to the valve body. A bottom frame is also fixedly installed on the valve body. An inner cavity communicating with the through holes is provided in the bottom frame, and a control mechanism for controlling the cover plate to turn up into the flow channel is installed on the bottom frame.

[0005] By adopting the above technical solution, the cover plate is turned up through the control mechanism, thereby changing the effective cross-sectional area of the flow channel, and further controlling the flow rate of the fluid, reducing the actual flow capacity of the flow channel. Therefore, the throttling degree can be quickly adjusted according to actual needs, improving the flexibility and adaptability of the system. Since a simple mechanical structure is adopted and it is integrally formed with the valve of the original pipeline directly, there is no need to additionally install valves such as throttle valves on the pipeline. This device does not require a complex pipeline installation process, and pipeline installers do not need professional welding or flange connection. The installation is simpler, faster, and less costly, and is applicable to low-demand throttling scenarios. In addition, when throttling is not required, the cover plate can be restored to the initial position through the control mechanism, so that the flow channel is restored to an unobstructed state, avoiding the problem that the traditional valve cannot cancel the throttling effect.

[0006] In a possible design, the control mechanism includes a tension spring and an adjusting bolt. One end of the tension spring is rotatably connected to the adjusting bolt, and the other end is fixed to the cover plate. The adjusting bolt is threadedly installed on the bottom frame from the outside to the inside.

[0007] With the above design, by rotating the adjusting bolt, the tension of the tension spring can be easily adjusted, thereby controlling the position of the cover plate, allowing the user to quickly adjust the throttling degree according to needs. Moreover, the elastic characteristics of the tension spring enable the opening of the cover plate to be larger and the effective cross-sectional area to be reduced when the fluid pressure in the flow channel increases, achieving the effect of flexibly controlling the downstream fluid flow rate.

[0008] In a possible design, the top surface of the cover plate is in the shape of an arc curved surface and fits the shape of the inner wall of the valve body.

[0009] With the above design, ensuring the tight fit between the cover plate and the inner wall of the valve body can effectively reduce the formation of turbulence of the fluid during throttling, thereby reducing noise and vibration and improving the smoothness of the fluid passing through the throttling device.

[0010] In a possible design, a guide plate is integrally provided in the inner cavity of the bottom frame, and the guide plate inclines towards the bottom of the bottom frame in the flowing direction into the flow channel.

[0011] With the above design, the fluid in the throttling part is guided to be relatively more stable after entering the inner cavity, improving the dynamic characteristics of the fluid when passing through the throttling device, helping the fluid to flow more smoothly, reducing the formation of turbulence in the bottom frame, and improving the smoothness of the fluid entering the bottom frame.

[0012] In a possible design, a drain bolt is also installed on the bottom of the bottom frame by threading.

[0013] With the above design, deposits are likely to accumulate in the bottom frame, enabling the user to open the bottom of the bottom frame through the drain bolt to remove impurities or deposits that may have accumulated in the bottom frame, facilitating cleaning and maintenance. Description of the Drawings

[0014] Figure 1 It is a cross-sectional view of the valve of the present utility model;

[0015] Figure 2 It is an external view of a specific embodiment of the present utility model;

[0016] Figure 3 It is a cross-sectional view of the cover plate of the present utility model in the closed state;

[0017] Figure 4 It is a cross-sectional view of the cover plate of the present utility model in the open state;

[0018] Among them, 1. Valve body; 11. Flow channel; 12. Through hole; 2. Cover plate; 3. Bottom frame; 31. Inner cavity; 32. Guide plate; 33. Drain bolt; 4. Control mechanism; 41. Tension spring; 42. Adjusting bolt. Detailed Embodiment

[0019] AsFigures 1 - 4 A throttling device for a valve as shown, comprising a valve body 1. A flow channel 11 is provided inside the valve body 1, and the flow channel 11 is for the passage of fluid. Through holes 12 penetrating inside and outside are provided on the inner wall of the flow channel 11, and a cover plate 2 is covered on the through holes 12. The cover plate 2 is rotatably connected to the valve body 1, and the cover plate 2 can be turned up into the flow channel 11, thereby changing the effective cross-sectional area of the flow channel 11. A bottom frame 3 is also fixedly installed on the valve body 1. An inner cavity 31 communicating with the through hole 12 is provided inside the bottom frame 3, and the inner cavity 31 is for carrying the throttled fluid and guiding the fluid in the throttling part into the inner cavity 31. A control mechanism 4 for controlling the cover plate 2 to turn up into the flow channel 11 is installed on the bottom frame 3, and the control mechanism 4 is responsible for manipulating the turning up and resetting of the cover plate 2. The valve can be one of a series of valves such as a ball valve, a butterfly valve, a globe valve, etc. ( Figure 1 in the figure is a ball valve), which means that the throttling device of the present application can be used in most types of valves. In addition, the throttling device of the present application can also be arranged around the inner wall of the valve body 1 and can have more than two. The control mechanism 4 can turn the cover plate 2 up and down, control the degree of the cover plate 2 entering the flow channel 11, change the effective cross-sectional area of the flow channel 11, and realize flow control, so that the user can quickly adjust the throttling degree according to actual needs, improving the flexibility and adaptability of the system. The device can not only adjust the throttling degree according to needs, but also when throttling is not required, the cover plate 2 can be restored to the initial position through the control mechanism 4, so that the flow channel 11 is restored to the unobstructed state, avoiding the problem that the traditional valve cannot cancel the throttling effect. Through a simple mechanical structure, the device can quickly adjust the throttling degree to meet the flow requirements under different working conditions. Compared with the traditional pipeline system with an additional throttle valve, the device does not require complex pipeline installation and is installed on the opening and closing valve originally installed on the pipeline, greatly reducing the installation cost and time.

[0020] The control mechanism 4 includes a tension spring 41 and an adjusting bolt 42. One end of the tension spring 41 is rotatably connected to the adjusting bolt 42, and the other end is fixed to the cover plate 2. The adjusting bolt 42 is threadedly installed on the bottom frame 3 from the outside to the inside. By rotating the adjusting bolt 42, the tension of the tension spring 41 is adjusted, and then the position of the cover plate 2 is controlled to realize the quick adjustment of the throttling degree. A rotatable body is provided at the end of the adjusting bolt 42, and the tension spring 41 is hooked inside the rotatable body. When the adjusting bolt 42 rotates, the rotatable body rotates relative to the adjusting bolt 42, while the rotatable body remains stationary relative to the tension spring 41. In order to ensure no leakage, sealing measures need to be taken at the adjusting bolt 42.

[0021] The top surface of the cover plate 2 is in an arc-shaped curved surface and fits the shape of the inner wall of the valve body 1. When the cover plate 2 is manufactured, it is actually a part of the through hole 12 cut on the valve body 1, and then a rotating shaft is passed through the cover plate 2 and the valve body 1. Therefore, it fits well with the valve body 1 itself, so that the shape of the cover plate 2 reduces the turbulence of the fluid during throttling, reducing noise and vibration.

[0022] A flow guiding plate 32 is integrally provided in the inner cavity 31 of the bottom frame 3. The flow guiding plate 32 is inclined from one side of the orifice of the through hole 12 towards the bottom of the bottom frame 3 in the direction of the flow path 11. The flow guiding plate 32 guides the fluid in the throttling part to be relatively more stable after entering the inner cavity 31, improves the dynamic characteristics of the fluid when passing through the throttling device, helps the fluid to flow more smoothly, reduces the formation of turbulence in the bottom frame 3, and improves the smoothness of the fluid entering the bottom frame 3.

[0023] Due to the easy accumulation of sediments in the bottom frame 3, a drain bolt 33 is also installed on the bottom of the bottom frame 3 by means of threads. The user regularly opens the drain bolt 33 to discharge the sediments in the inner cavity 31 of the bottom frame 3, so as to keep the valve clean and operate efficiently.

Claims

1. A throttling device for a valve, comprising a valve body (1), wherein a flow channel (11) is provided in the valve body (1), wherein: A through hole (12) is provided on the inner wall of the flow channel (11) and is connected to the inside and the outside. The through hole (12) is covered with a cover plate (2), and the cover plate (2) is rotatably connected to the valve body (1). A bottom frame (3) is also fixedly mounted on the valve body (1), and the bottom frame (3) has an inner cavity (31) connected to the through hole (12). A control mechanism (4) for controlling the cover plate (2) to be turned up into the flow channel (11) is mounted on the bottom frame (3).

2. The throttling device for a valve according to claim 1, characterized in that: The control mechanism (4) comprises a tension spring (41) and an adjusting bolt (42); one end of the tension spring (41) is rotatably connected to the adjusting bolt (42), and the other end is fixed to the cover plate (2); the adjusting bolt (42) is threadedly mounted on the bottom frame (3) from outside to inside.

3. The throttling device for a valve according to claim 1 or 2, characterized in that: The top surface of the cover plate (2) is in the shape of an arc surface and fits the shape of the inner wall of the valve body (1).

4. The throttling device for a valve according to claim 1 or 2, characterized in that: A guide plate (32) is integrally provided in the inner cavity (31) of the bottom frame (3), and the flow direction of the guide plate (32) into the flow channel (11) is inclined towards the bottom of the bottom frame (3).

5. The throttling device for a valve according to claim 1 or 2, characterized in that: A sewage discharge bolt (33) is also threadedly mounted on the bottom of the bottom frame (3).

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