Round flaw reducing pore plate device

Abstract

A segmental variable-diameter pore plate device comprises a fixed cover plate A, a fixed cover plate B and a movable clamping plate, and the fixed cover plate A and the fixed cover plate B are connected to a chemical pipeline; an overflowing circular hole A and an overflowing circular hole B which have the same diameter as the chemical pipeline are respectively formed in the lower parts of the centers of the fixed cover plate A and the fixed cover plate B; the movable clamping plate is sealed between the fixed cover plate A and the fixed cover plate B. The upper portion of the movable clamping plate is connected with the connecting rod. The upper ends of the fixed cover plate A and the fixed cover plate B are sealed by metal diaphragms, the inner sides of the metal diaphragms are connected with the connecting rod, and transmission structures are arranged in the centers of the outer sides of the metal diaphragms.

Description

Technical Field

[0001] This patent relates to the technical field of throttling devices, and specifically to a circular variable diameter orifice plate device. Background Art

[0002] At present, the chemical industry needs to control and regulate pressure or fluid flow, and this process often requires the use of throttling devices such as throttling orifice plates. As for orifice plates, the most widely used is the standard orifice plate, which is generally in the shape of a disc with a circular hole in the middle. Under the condition of sonic speed, the mass flow of the fluid passing through the orifice is correlated to the pressure in front of the orifice plate. Therefore, the pressure in front of the orifice plate can be controlled to more accurately control the flow through the orifice, thereby controlling the flow rate for the chemical system.

[0003] According to the application scenarios, a variety of orifice plates have been invented and applied: standard orifice plates, circular segment orifice plates, eccentric orifice plates, balanced orifice plates, flange orifice plates, etc. Among them, the circular segment orifice plate is named because its shape is a circular segment flow aperture cut out on a disc. The circular segment orifice plate is very suitable for the transportation of multiphase coexisting fluids: when the circular segment aperture faces upward, the circular segment orifice plate is suitable for the transportation of gas-liquid mixed media containing a small amount of gas; when the circular segment aperture faces downward, the circular segment orifice plate is suitable for the transportation of solid-liquid or solid-gas mixed media containing a small amount of solid.

[0004] However, the existing segmented orifice plates cannot change their segmented aperture size. When the mass flow of the chemical system is greatly adjusted, it may exceed the pressure adjustment range before the orifice plate, so it is often necessary to replace the orifice plate device with a new aperture size. This orifice plate replacement operation is usually accompanied by evacuation, purging, sampling, plate installation, leak detection, passivation and other operations, which is time-consuming and labor-intensive. Summary of the invention

[0005] The purpose of the present invention is to transform the circular segment orifice plate into a limit mechanism and a movable clamping plate by performing baffle transformation on the circular segment orifice plate, introduce an actuator, and achieve the goal of changing the diameter of the circular segment orifice plate.

[0006] The technical scheme of the present invention is as follows: a circular segment variable diameter orifice plate device, comprising a fixed cover plate A, a fixed cover plate B and a movable clamping plate, wherein the fixed cover plate A and the fixed cover plate B are connected to a chemical pipeline; a flow circular hole A and a flow circular hole B with the same diameter as the chemical pipeline are respectively opened at the lower center of the fixed cover plate A and the fixed cover plate B; the movable clamping plate is sealed between the fixed cover plate A and the fixed cover plate B, and the upper part of the movable clamping plate is connected to a connecting rod; the upper ends of the fixed cover plates A and the fixed cover plates B are sealed with a metal diaphragm, the inner side of the metal diaphragm is connected to the connecting rod, and a transmission structure is provided at the center of the outer side of the metal diaphragm.

[0007] The fixed cover plate A and the fixed cover plate B are connected to the chemical pipeline through flanges.

[0008] During assembly, the centers of the flow holes A and B are aligned with the center axis of the chemical pipeline.

[0009] The movable card board is rectangular.

[0010] A connecting rod is welded to the upper part of the moving card plate.

[0011] The metal diaphragm is curved in shape and has a certain elasticity.

[0012] A transmission structure is welded at the center of the outer side of the metal diaphragm.

[0013] The upper end of the movable card plate is lower than the upper ends of the fixed cover plates A and B, and the lower end of the movable card plate covers a part of the flow circular holes A and B.

[0014] Driven by the transmission structure, the metal diaphragm moves up and down, driving the connecting rod to move up and down, driving the movable clamping plate to move up and down, so that the area covered by the movable clamping plate on the flow holes A and the flow holes B changes, thereby changing the flow area between the rectangular movable clamping plate and the flow holes A and the flow holes B.

[0015] The movable pallet can only move up and down, and is restricted from moving in other directions.

[0016] The significant effect of the present invention is that compared with the prior art, the beneficial effect of the present invention is that the "a circular variable diameter orifice plate device" has the following advantages:

[0017] (1) Simple structure and good sealing performance. Compared with the existing "shutter-type" variable diameter orifice plate, the circular variable diameter orifice plate only needs one movable card plate and two fixed cover plates to complete the diameter change. It has a simple structure and few potential fault points. At the same time, it is not easy for dirt to block the movable structure and make the diameter change ineffective. It is more practical. The use of metal diaphragm seal to separate the actuator and the variable diameter orifice plate not only realizes the transmission of the movable structure, but also achieves the sealing effect, achieving the goal of safe and reliable diameter change.

[0018] (2) The flow area can be controlled freely. When the pressure in front of the orifice plate remains unchanged, the flow area of ​​the orifice plate can be changed by moving the movable clamp plate up and down, thereby controlling the flow rate through the orifice plate. Within the allowable adjustment range of the pressure in front of the orifice plate, the flow area of ​​the orifice plate can be controlled and changed, so that the flow rate through the orifice can be adjusted within a larger range.

[0019] (3) Save a lot of manpower and material resources. The circular variable diameter orifice plate can adjust the flow rate through the orifice in the chemical pipeline within a larger range, so it is suitable for chemical solutions with a larger flow range. It greatly reduces the orifice plate replacement operation caused by the conversion of chemical solutions, which not only saves the need to purchase orifice plates with similar apertures, but also saves manpower investment. At the same time, for chemical systems that do not require strict control of pressure and flow at the same time, the orifice plate's variable diameter function replaces the pressure control function of the pressure regulating equipment before the orifice plate, thereby saving the need for these pressure regulating equipment and their supporting facilities (such as zero position equipment).

[0020] (4) Significantly improve the automation level of the chemical system. The circular segment variable diameter orifice plate is equipped with an actuator to transmit the pressure before and after the orifice plate and the orifice plate opening to the control system. A certain program is set in the control system to automatically control the flow in the chemical pipeline using the "pressure-flow-opening" curve. The traditional uncontrollable circular segment orifice plate becomes an automatically controllable circular segment variable diameter orifice plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attached Figure 1 The utility model is a schematic diagram of the installation of a circular variable diameter orifice plate device of the present invention.

[0022] Attached Figure 2 It is a structural schematic diagram of a circular variable diameter orifice plate device of the present invention.

[0023] In the figure: 1 fixed cover plate A, 2 fixed cover plate B, 3 movable clamping plate, 4 flow hole A, 5 flow hole B, 6 connecting rod, 7 metal diaphragm, 8 transmission structure. DETAILED DESCRIPTION

[0024] Many specific details are described in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present application, so the present application is not limited by the specific implementation disclosed below.

[0025] The terms used in one or more embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of the present application. The singular forms of "a", "said" and "the" used in one or more embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in one or more embodiments of the present application refers to and includes any or all possible combinations of one or more associated listed items.

[0026] It should be understood that, although the terms first, second, etc. may be used to describe various information in one or more embodiments of the present application, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0027] A circular segment variable diameter orifice device comprises a fixed cover plate A1, a fixed cover plate B2 and a movable clamping plate 3, wherein the fixed cover plates A1 and B2 are connected to a chemical pipeline 9 through flanges. A flow hole A4 and a flow hole B5 having the same diameter as the chemical pipeline 9 are opened at the lower center of the fixed cover plates A1 and B2, and the center of the holes is aligned with the central axis of the chemical pipeline 9 during assembly; the movable clamping plate 3 is rectangular and is always sealed between the fixed cover plates A1 and B2, and a connecting rod 6 is welded to the upper part of the movable clamping plate 3; the upper ends of the fixed cover plates A1 and B2 are sealed with a bent metal diaphragm 7 having a certain elasticity, the inner side of the metal diaphragm 7 is connected to the connecting rod 6, and a transmission structure 8 is welded to the center of the outer side of the metal diaphragm 7.

[0028] Driven by the transmission structure 8, the metal diaphragm 7 with a certain elasticity moves up and down, driving the connecting rod 6 to move up and down, driving the movable clamping plate 3 to move up and down, and the flow area between the rectangular movable clamping plate 3 and the flow holes A4 and B5 is changed, realizing the diameter-changing function of the circular orifice plate.

[0029] When the flow rate needs to be increased, the movable plate is lifted upward to increase the flow area; when the flow rate needs to be reduced, the movable orifice plate is lowered downward to reduce the flow area.

[0030] When in use, the movable card can only move up and down, and is restricted in other directions. In the direction of fluid flow, only a small amount of space is left between the fixed cover and the movable card, so that the movable card can move up and down. Leaving too much space between the two will cause turbulence in the through-hole fluid, so that the actual through-hole flow rate deviates greatly from the theoretical calculation result.

[0031] The above description is only a preferred embodiment of this patent and is not intended to limit this patent. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this patent should be included in the scope of protection of this patent.

[0032] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described action sequence, because according to the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0033] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0034] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The optional embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of the present application. The present application selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can understand and use the present application well.

Claims

1. A circular variable diameter orifice plate device, characterized in that: The invention comprises a fixed cover plate A (1), a fixed cover plate B (2) and a movable clamping plate (3), wherein the fixed cover plate A (1) and the fixed cover plate B (2) are connected to a chemical pipeline (9); a flow hole A (4) and a flow hole B (5) having the same diameter as the chemical pipeline (9) are respectively opened at the lower center of the fixed cover plate A (1) and the fixed cover plate B2; the movable clamping plate (3) is sealed between the fixed cover plate A (1) and the fixed cover plate B (2), and the upper part of the movable clamping plate (3) is connected to a connecting rod (6); the upper ends of the fixed cover plates A (1) and the fixed cover plates B2 are sealed by a metal diaphragm (7), the inner side of the metal diaphragm (7) is connected to the connecting rod (6), and the outer center of the metal diaphragm (7) is provided with a transmission structure (8).

2. A circular variable diameter orifice plate device according to claim 1, characterized in that: The fixed cover plate A (1) and the fixed cover plate B (2) are connected to the chemical pipeline (9) via flanges.

3. A circular variable diameter orifice plate device according to claim 1, characterized in that: During assembly, the centers of the flow holes A (4) and B (5) are aligned with the center axis of the chemical pipeline (9).

4. A circular variable diameter orifice plate device according to claim 1, characterized in that: The movable card plate (3) is rectangular.

5. The circular variable diameter orifice plate device according to claim 1, characterized in that: A connecting rod (6) is welded to the upper part of the movable clamping plate (3).

6. A circular variable diameter orifice plate device according to claim 1, characterized in that: The metal diaphragm (7) is curved in shape and has a certain elasticity.

7. The circular variable diameter orifice plate device according to claim 1, characterized in that: A transmission structure (8) is welded at the center of the outer side of the metal diaphragm (7).

8. The circular variable diameter orifice plate device according to claim 1, characterized in that: The upper end of the movable clamping plate (3) is lower than the upper ends of the fixed cover plate A (1) and the fixed cover plate B (2), while the lower end of the movable clamping plate (3) covers a portion of the flow circular hole A (4) and the flow circular hole B (5).

9. A circular variable diameter orifice plate device according to claim 8, characterized in that: Driven by the transmission structure (8), the metal diaphragm (7) moves up and down, driving the connecting rod (6) to move up and down, driving the movable clamping plate (3) to move up and down, so that the area of ​​the flow circular hole A (4) and the flow circular hole B (5) covered by the movable clamping plate (3) changes, thereby changing the flow area between the rectangular movable clamping plate (3) and the flow circular hole A (4) and the flow circular hole B (5).

10. The circular variable diameter orifice plate device according to claim 1, characterized in that: The movable card plate (3) can only move up and down, and is restricted from moving in other directions.

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