Self-operated flow regulating valve

Abstract

A connecting pipe is arranged between an upper valve pipe and a lower valve pipe, cavities of the upper valve pipe and the lower valve pipe are conical cavities, the small ends of the upper valve pipe and the lower valve pipe are opposite, a guide sleeve is connected into the connecting pipe through a supporting frame, the guide sleeve and the connecting pipe are coaxial, and a connecting rod is arranged in the guide sleeve. One end of the connecting rod extends into the cavity of the upper valve pipe and is provided with a driving floating ball, and the other end of the connecting rod extends into the cavity of the lower valve pipe and is provided with a driven floating ball. According to the utility model, the flow of the fluid is directly regulated instead of regulating the pressure in front of / behind the valve, so that the flow can be more directly and accurately controlled. According to terminal requirements, the fluid flow can be integrally increased or reduced, different requirements of different terminal users for the fluid flow are met, and uniform flow distribution of a multi-terminal fluid system can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of flow regulating devices, and in particular relates to a self-operated flow regulating valve. Background Art

[0002] A self-operated regulating valve is a valve that is driven by the properties of the medium flowing through the regulating valve, such as the temperature, pressure, flow rate, etc. of the medium, thereby regulating the medium flowing through the valve. It does not rely on external power or signals.

[0003] Self-operated regulating valves can be divided into three types: self-operated pressure regulating valves, self-operated differential pressure regulating valves, and self-operated flow regulating valves.

[0004] In existing technologies, the three types of control valves mentioned above all achieve self-operated regulation of pressure, differential pressure, and flow by detecting pressure upstream and downstream of the valve and converting it into an adjustment signal for automatic adjustment. However, in actual applications, self-operated flow control valves do not directly detect flow, making precise adjustment impossible and failing to meet industrial application requirements.

[0005] In multi-terminal parallel fluid distribution networks, flow must be evenly distributed across all terminals, with the ability to increase or decrease the overall flow rate based on end-user needs. Because fluid pressure is higher near the source and lower at the distal end, self-operated flow valves that rely solely on pressure regulation are prone to significant flow variations between terminals in the distribution network, hindering industrial production.

[0006] In view of the above situation, there is an urgent need for a self-operated flow control valve that can directly perform feedback regulation on the fluid flow. Utility Model Content

[0007] The technical problem to be solved by the utility model is to overcome the shortcomings of the existing technology and provide a self-operated flow regulating valve with reasonable design, simple structure and the ability to evenly distribute flow in a multi-terminal parallel fluid distribution network.

[0008] The technical solution adopted to solve the above technical problems is: a self-operated flow regulating valve, a connecting pipe is arranged between the upper valve tube and the lower valve tube, the cavities of the upper valve tube and the lower valve tube are both conical cavities and the small ends of the two are opposite, a guide sleeve is connected to the connecting pipe through a support frame, the guide sleeve is coaxial with the connecting pipe, a connecting rod is arranged in the guide sleeve, one end of the connecting rod extends into the cavity of the upper valve tube and an active float is arranged at the end portion, and one end of the connecting rod extends into the cavity of the lower valve tube and a driven float is arranged at the end portion.

[0009] As a preferred technical solution, the connecting rod is composed of an upper connecting rod and a lower connecting rod, the lower end of the upper connecting rod and the upper end of the lower connecting rod are both located in the guide sleeve, and the lower end of the upper connecting rod and the upper end of the lower connecting rod are both provided with a sliding plate, and the sliding plate has the same inner diameter as the guide sleeve.

[0010] As a preferred technical solution, a guide tube is provided between the guide sleeve wall and the connecting tube wall. The guide tube is located between the two sliding plates. A guide port is provided on the guide tube wall. The connecting tube cavity is connected to the cavity between the two sliding plates in the guide sleeve through the guide port and the guide tube. An adjusting bolt threadedly connected to the guide tube is provided on the side wall of the connecting tube. The adjusting bolt adjusts the size of the guide port opening.

[0011] As a preferred technical solution, the shape of the inner cavity of the lower valve tube can also be a shape formed by rotating a parabola or a hyperbola around the central axis of the lower valve tube.

[0012] The beneficial effects of the utility model are as follows:

[0013] This utility model directly regulates fluid flow, rather than adjusting the pressure before or after the valve, enabling more direct and precise flow control. It can increase or decrease fluid flow overall based on terminal requirements, meeting the varying fluid flow demands of different end users. This can achieve uniform flow distribution across multi-terminal fluid systems, avoiding large flow deviations in individual branches and ensuring even flow distribution across all terminals. It features a simple actuator and manufacturing process, reducing manufacturing costs and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of embodiment 1 of the present utility model.

[0015] Figure 2 This is a schematic diagram of the connecting pipe of Example 2 of the present utility model.

[0016] Figure 3 This is a schematic structural diagram of embodiment 2 of the present invention connected to a fluid distribution network.

[0017] Among them: lower valve tube 1; driven float 2; connecting rod 3; upper connecting rod 31; sliding plates 32, 33; lower connecting rod 34; connecting tube 4; guide sleeve 41; guide port 42; adjusting bolt 43; guide tube 44; active float 5; upper valve tube 6. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and examples, but the present invention is not limited to the following embodiments.

[0019] Example 1

[0020] exist Figure 1 In the self-operated flow regulating valve of this embodiment, a connecting pipe 4 is connected between the upper valve tube 6 and the lower valve tube 1 through a flange. The cavities of the upper valve tube 6 and the lower valve tube 1 are both conical cavities and the small ends of the two are opposite to each other. A guide sleeve 41 is connected to the connecting pipe 4 through a support frame. The guide sleeve 41 is coaxial with the connecting pipe 4. A connecting rod 3 is arranged in the guide sleeve 41. One end of the connecting rod 3 extends into the cavity of the upper valve tube 6 and an active float 5 is arranged at the end portion. One end of the connecting rod 3 extends into the cavity of the lower valve tube 1 and a driven float 2 is arranged at the end portion.

[0021] Connect this regulating valve to the fluid distribution network, and the fluid enters the upper valve pipe 6 through the lower valve pipe 1 and the connecting pipe 4. The active ball and the driven ball move axially upward under the buoyancy generated by the fluid, and eventually move to the balance point of buoyancy and gravity. At this time, the fluid resistance increases, resulting in a decrease in flow rate. The two balls work together to stabilize the fluid flow at a set value.

[0022] Example 2

[0023] exist Figure 2 In the embodiment, the connecting rod 3 is composed of an upper connecting rod 31 and a lower connecting rod 34. The lower end of the upper connecting rod 31 and the upper end of the lower connecting rod 34 are both located in the guide sleeve 41. The lower end of the upper connecting rod 31 and the upper end of the lower connecting rod 34 are fixedly connected with a sliding plate 32 and a sliding plate 33 respectively. The sliding plates 32 and 33 have the same inner diameter as the guide sleeve 41. A guide pipe 44 is provided between the wall of the guide sleeve 41 and the wall of the connecting pipe 4. The guide pipe 44 is located between the two sliding plates 32 and 33. A guide port 42 is processed on the wall of the guide pipe 44. The cavity of the connecting pipe 4 is connected to the cavity between the two sliding plates 32 and 33 in the guide sleeve 41 through the guide port 42 and the guide pipe 44. An adjusting bolt 43 threadedly connected to the guide pipe 44 is provided on the side wall of the connecting pipe 4. The area of ​​the guide port 42 covered is adjusted by adjusting the bolt 43, thereby adjusting the opening size of the guide port 42. The fluid in the cavity of the connecting pipe 4 enters the guide pipe 44 through the guide port 42 and flows into the cavity between the two sliding plates 32 and 33 in the guide sleeve 41. Under the action of hydraulic pressure and the gravity of the two floats, the two floats automatically adjust their positions up and down until a balance point is found, thereby realizing flow regulation.

[0024] Other components and their connection relationships are the same as those in Example 1.

[0025] like Figure 3, the flow control valve of this embodiment is installed on branch 1, branch 2, and branch 3 of the fluid distribution network. Since the distances between each branch and the fluid source are different, the pressure at the root of the main line of each branch is P0>P11>P21>P31, while the terminal expects P12=P22=P32. If an ordinary self-operated control valve is used, the above function may be achieved under rated working conditions. However, under higher or lower load working conditions, due to the change in P0 pressure, P11, P21, and P31 will drop in different proportions, resulting in nonlinear changes in the pressure before each control valve, and the valve cannot maintain the original even distribution of flow at each terminal. Through the overall rebalancing of the flow control valve of this embodiment, even distribution of flow at each terminal under the new load state can be achieved. Because industrial equipment cannot always operate under rated working conditions, the utility model greatly meets the application needs in this regard.

[0026] Example 3

[0027] In Examples 1 and 2, the cavity shape of the lower valve tube 1 can also be a shape formed by rotating a parabola or a hyperbola around the central axis of the lower valve tube to achieve flow control for different requirements. Other components and their connection relationships are the same as those in the corresponding embodiments.

Claims

1. A self-operated flow regulating valve, characterized in that: A connecting pipe is provided between the upper valve pipe and the lower valve pipe. The cavities of the upper valve pipe and the lower valve pipe are both conical cavities and the small ends of the two are opposite to each other. A guide sleeve is connected to the connecting pipe through a support frame. The guide sleeve is coaxial with the connecting pipe. A connecting rod is provided in the guide sleeve. One end of the connecting rod extends into the cavity of the upper valve pipe and an active float is provided at the end portion. One end of the connecting rod extends into the cavity of the lower valve pipe and a driven float is provided at the end portion.

2. The self-operated flow regulating valve according to claim 1, characterized in that: The connecting rod is composed of an upper connecting rod and a lower connecting rod, the lower end of the upper connecting rod and the upper end of the lower connecting rod are both located in the guide sleeve, and the lower end of the upper connecting rod and the upper end of the lower connecting rod are both provided with a sliding plate, and the sliding plate has the same inner diameter as the guide sleeve.

3. The self-operated flow regulating valve according to claim 2, characterized in that: A flow guide pipe is provided between the guide sleeve wall and the connecting pipe wall. The flow guide pipe is located between the two sliding plates. A flow guide port is provided on the flow guide pipe wall. The connecting pipe cavity is connected to the cavity between the two sliding plates in the guide sleeve through the flow guide port and the flow guide pipe. An adjusting bolt threadedly connected to the flow guide pipe is provided on the side wall of the connecting pipe. The adjusting bolt adjusts the size of the flow guide port opening.

4. The self-operated flow regulating valve according to claim 1 or 3, characterized in that: The shape of the inner cavity of the lower valve tube may also be a shape formed by rotating a parabola or a hyperbola around the central axis of the lower valve tube.

Images