Throttling assembly and machining tool

Abstract

The utility model provides a throttling assembly and a machining tool, the throttling assembly comprises a plurality of annular cylinders which are sequentially nested from outside to inside, and the side wall of each annular cylinder is circumferentially provided with a plurality of flow guide holes which are distributed in an array shape; every two adjacent annular cylinders are mutually staggered in the circumferential direction, so that each flow guide hole in each annular cylinder is partially overlapped with one or more flow guide holes in the adjacent annular cylinder; the machining tool comprises an upper tray, a lower tray and a center rod. A first annular step is arranged on the edge of the lower end of the upper tray, the upper end of the throttling assembly is connected to the first annular step in a sleeving mode and abuts against the upper tray, a second annular step is arranged on the edge of the upper end of the lower tray, and the lower end of the throttling assembly is connected to the second annular step in a sleeving mode and abuts against the lower tray. The central rod axially penetrates through the middle parts of the upper tray and the lower tray and is fixed with the upper tray and the lower tray; the throttling assembly has the advantages of being simple in structure and easy to machine.

Description

Technical Field

[0001] The utility model relates to the technical field of regulating valve accessories, in particular to a throttling component and a processing tool. Background Art

[0002] Control valves are widely used in power plants, metallurgy, petrochemicals, textiles, papermaking and other industrial sectors. They are important links and key equipment for automatic control of parameters such as temperature, pressure, flow, and liquid level in industrial processes. With the improvement of industrial automation levels and the continuous expansion of production scales, industrial automation devices are developing towards large-scale, high-parameter and high-performance directions, which puts forward more and more stringent requirements on control valves.

[0003] The most common scenario for the use of high-pressure differential control valves is thermal power generation. In order to improve thermal efficiency, thermal power stations have higher and higher water supply parameters, resulting in some control valves being used under extremely high pressure differentials. Due to the large inlet and outlet pressure differential of the control valve in this system, severe cavitation will occur to control valves of ordinary structure. Cavitation is very destructive to the valve core and valve seat. Once it occurs, the valve seat sealing surface will be severely damaged in two to three months at most, or one or two weeks at least, causing the leakage to reach more than 30% of the rated flow rate. The control valve will lose its adjustment and closing functions, affecting the normal operation of the unit.

[0004] As a key component of the high-pressure differential regulating valve, the throttling assembly has the characteristics of low noise, anti-cavitation, and ability to withstand high-pressure differentials. The throttling assembly composed of common discs is a disc (metal disc) with several independent grooves processed on it. The pressure is reduced layer by layer while the flow rate is also controlled, and the discs are then stacked to form a throttling assembly.

[0005] However, since the thickness of the disc is generally thin and many grooves with complex structures need to be processed on the disc, the processability is poor. Multiple discs also need to be processed one by one, which further increases the processing difficulty. At the same time, the connection of multiple discs is also a process difficulty. In summary, the throttling assembly composed of the above-mentioned discs has the disadvantages of complex structure and high processing difficulty. Summary of the invention

[0006] The technical problem to be solved by the utility model is to provide a throttling component and a processing tool, which, compared with the throttling components composed of discs currently on the market, have the advantages of simple structure and simple processing.

[0007] The utility model provides a throttling component, comprising a plurality of annular cylinders which are nested in sequence from outside to inside, a plurality of flow guide holes distributed in an array are circumferentially arranged on the side wall of each annular cylinder, every two adjacent annular cylinders are circumferentially staggered with each other so that each flow guide hole on each annular cylinder partially overlaps with one or more flow guide holes on an adjacent annular cylinder, and every two adjacent annular cylinders are fixed to each other.

[0008] After adopting the above structure, the utility model can achieve the purpose of throttling because each two adjacent annular cylinders are circumferentially offset from each other so that each guide hole on each annular cylinder partially overlaps with one or more guide holes on the adjacent annular cylinder. The throttling component of this structure has the advantages of simple structure and simple processing.

[0009] In a possible embodiment, the upper end and the lower end of each two adjacent annular cylinders are fixed by soldering; by adopting this structure, the upper end and the lower end of each two adjacent annular cylinders can be reliably fixed together, and it has the advantage of convenient fixing. After the two adjacent annular cylinders are fixed, relative rotation can be avoided.

[0010] The throttling assembly is a kind of processing tool, and is used to process the above-mentioned throttling assembly, and the processing tool comprises an upper tray, a lower tray and a center rod; the upper tray and the lower tray are respectively located above and below the throttling assembly in the axial direction, and a first annular step is provided at the edge of the lower end of the upper tray, the upper end of the throttling assembly is sleeved on the first annular step and abuts against the upper tray, and a second annular step is provided at the edge of the upper end of the lower tray, and the lower end of the throttling assembly is sleeved on the second annular step and abuts against the lower tray, and the center rod is axially penetrated through the middle of the upper tray and the lower tray and fixed to the upper tray and the lower tray so that the upper tray and the lower tray clamp the throttling assembly, and the center rod is used for transmission connection with the processing machine tool; after adopting this processing tool, when in use, first, the throttling assembly formed by the nesting of a plurality of annular cylinders is matched and plugged with the first annular step and the second annular step, and then the center rod is passed through the lower tray and the upper tray and The center rod fixes the lower tray and the upper tray. At this time, the upper tray and the lower tray can clamp the throttling assembly. Then the center rod is assembled in the processing machine. Then the processing machine punches a row of guide holes in the throttling assembly along the axial direction of the throttling assembly. Then the processing machine drives the center rod to rotate a certain angle. Then the processing machine continues to punch a row of guide holes in the throttling assembly along the axial direction of the throttling assembly. By repeating the above punching steps, the process of punching guide holes in the circumferential direction of the throttling assembly is completed. After the throttling assembly is completed with the guide holes punched, the processing tool and the throttling assembly are removed from the processing tool, and then the throttling assembly is removed from the processing tool. Then the angle of each adjacent two annular cylinders is adjusted so that each guide hole on each annular cylinder partially overlaps with one or more guide holes on the adjacent annular cylinder. Finally, each adjacent two annular cylinders are fixed.

[0011] In a possible embodiment, an annular boss is provided on the outer wall of the center rod, and the annular boss abuts against the lower end surface of the lower tray, and the processing tooling also includes a gasket and a nut, which are sequentially sleeved on the outside of the center rod located above the upper tray from bottom to top, and the nut is threadedly fastened with the center rod so that the upper tray and the lower tray clamp the throttling assembly, and the lower end of the center rod is used for transmission connection with the rotating shaft in the processing machine tool, and a thimble hole is coaxially provided in the middle of the upper end of the center rod, and the thimble hole is used for the thimble in the processing machine tool to be inserted and rotated with the thimble; by adopting this structure, after the nut is threadedly fastened with the center rod, the upper tray and the lower tray can reliably clamp the throttling assembly, and in addition, after the lower end of the center rod is transmission connected with the rotating shaft in the processing machine tool, and after the thimble in the processing machine tool is inserted into the thimble hole, after the processing machine tool punches a row of guide holes in the throttling assembly along the axial direction of the throttling assembly, the processing machine tool can reliably drive the throttling assembly to rotate a certain angle through the center rod.

[0012] In a possible embodiment, an upper friction pad is mounted on the top surface of the first annular step, and a lower friction pad is mounted on the bottom surface of the second annular step, and the upper and lower ends of the throttling assembly are respectively abutted against the upper friction pad and the lower friction pad; by adopting this structure, after the upper and lower ends of the throttling assembly are respectively abutted against the upper friction pad and the lower friction pad, the friction force between the throttling assembly and the upper tray and the lower tray can be increased, so that after the upper tray and the lower tray clamp the throttling assembly, the throttling assembly can be effectively prevented from rotating relative to the upper tray and the lower tray, that is, the reliability of the upper tray and the lower tray after clamping the throttling assembly can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the three-dimensional structure of the throttling component;

[0014] Figure 2 is a first cross-sectional structural schematic diagram of a throttling assembly;

[0015] Figure 3 is a second cross-sectional structural schematic diagram of the throttling assembly;

[0016] Figure 4 It is a schematic diagram of the three-dimensional structure after the throttling component and the processing tooling are assembled;

[0017] Figure 5 It is a schematic diagram of the cross-sectional structure after the throttling component and the processing tooling are assembled. DETAILED DESCRIPTION

[0018] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0019] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0020] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0021] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] See also Figure 1-3 As shown, an embodiment of the present application discloses a throttling assembly, comprising a plurality of annular cylinders 1 nested in sequence from the outside to the inside, a plurality of guide holes 11 distributed in an array are circumferentially arranged on the side wall of each annular cylinder 1, and every two adjacent annular cylinders 1 are circumferentially offset from each other so that each guide hole 11 on each annular cylinder 1 partially overlaps with one or more guide holes 11 on the adjacent annular cylinder 1, and every two adjacent annular cylinders 1 are fixed to each other.

[0023] The upper and lower ends of each two adjacent annular cylinders 1 are fixed by soldering; by adopting this structure, the upper and lower ends of each two adjacent annular cylinders can be reliably fixed together, and it has the advantage of convenient fixing. After the two adjacent annular cylinders are fixed, relative rotation can be avoided.

[0024] See also Figure 4 and 5As shown, a processing tool is used to process the above-mentioned throttling component, the processing tool comprises an upper tray 2, a lower tray 3 and a center rod 4; the upper tray 2 and the lower tray 3 are respectively located above and below the throttling component in the axial direction, and a first annular step 21 is provided at the edge of the lower end of the upper tray 2, the upper end of the throttling component is sleeved on the first annular step 21 and abuts against the upper tray 2, and a second annular step 31 is provided at the edge of the upper end of the lower tray 3, the lower end of the throttling component is sleeved on the second annular step 31 and abuts against the lower tray 3, the center rod 4 axially penetrates the middle of the upper tray 2 and the lower tray 3 and is fixed to the upper tray 2 and the lower tray 3 so that the upper tray 2 and the lower tray 3 clamp the throttling component, and the center rod 4 is used for transmission connection with the processing machine tool; after adopting this processing tool, when in use, first the throttling component formed by nesting a plurality of annular cylinders is plugged into the first annular step and the second annular step, and then The center rod is passed through the lower tray and the upper tray and the center rod fixes the lower tray and the upper tray. At this time, the upper tray and the lower tray can clamp the throttling assembly. The center rod is then assembled in the processing machine. The processing machine then punches a row of guide holes in the throttling assembly along the axial direction of the throttling assembly. The processing machine then drives the center rod to rotate a certain angle. Then the processing machine continues to punch a row of guide holes in the throttling assembly along the axial direction of the throttling assembly. The above punching steps are repeated until the process of punching guide holes in the circumferential direction of the throttling assembly is completed. After the throttling assembly has completed the guide holes, the processing tool and the throttling assembly are removed from the processing tool. The throttling assembly is then removed from the processing tool. The angle of each adjacent two annular cylinders is then adjusted so that each guide hole on each annular cylinder partially overlaps with one or more guide holes on the adjacent annular cylinder. Finally, each adjacent two annular cylinders are fixed.

[0025] An annular boss 41 is provided on the outer wall of the center rod 4, and the annular boss 41 abuts against the lower end surface of the lower tray 3. The processing tooling also includes a gasket 5 and a nut 6. The gasket 5 and the nut 6 are sequentially sleeved on the outside of the center rod 4 located above the upper tray 2 from bottom to top. The nut 6 is threadedly fastened to the center rod 4 so that the upper tray 2 and the lower tray 3 clamp the throttling assembly. The lower end of the center rod 4 is used for transmission connection with the rotating shaft in the processing machine tool. The middle part of the upper end of the center rod 4 is coaxially provided with an ejector hole 42. The ejector hole 42 It is used for the insertion of the ejector in the processing machine tool and for rotating with the ejector; by adopting this structure, after the nut is threadedly tightened with the center rod, the upper tray and the lower tray can reliably clamp the throttling assembly. In addition, the lower end of the center rod is transmission connected to the rotating shaft in the processing machine tool, and after the ejector in the processing machine tool is inserted into the ejector hole, after the processing machine tool drills a row of guide holes in the throttling assembly along the axial direction of the throttling assembly, the processing machine tool can reliably drive the throttling assembly to rotate a certain angle through the center rod.

[0026] An upper friction pad 7 is mounted on the top surface of the first annular step 21, and a lower friction pad 8 is mounted on the bottom surface of the second annular step 31, and the upper and lower ends of the throttling assembly are respectively abutted against the upper friction pad 7 and the lower friction pad 8; by adopting this structure, after the upper and lower ends of the throttling assembly are respectively abutted against the upper friction pad and the lower friction pad, the friction force between the throttling assembly and the upper tray and the lower tray can be increased, so that after the upper tray and the lower tray clamp the throttling assembly, the throttling assembly can be effectively prevented from rotating relative to the upper tray and the lower tray, that is, the reliability of the upper tray and the lower tray after clamping the throttling assembly can be improved.

[0027] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A throttling assembly, characterized in that: The invention comprises a plurality of annular cylinders (1) which are nested in sequence from the outside to the inside, a plurality of flow guide holes (11) distributed in an array are circumferentially arranged on the side wall of each annular cylinder (1), and each adjacent two annular cylinders (1) are circumferentially offset from each other so that each flow guide hole (11) on each annular cylinder (1) partially overlaps with one or more flow guide holes (11) on an adjacent annular cylinder (1), and each adjacent two annular cylinders (1) are fixed to each other.

2. The throttling assembly according to claim 1, characterized in that: The upper ends and lower ends of each two adjacent annular cylinders (1) are fixed by welding.

3. A processing tool for processing the throttling assembly according to claim 1 or 2, characterized in that: The processing tooling comprises an upper tray (2), a lower tray (3) and a center rod (4); the upper tray (2) and the lower tray (3) are respectively located above and below the throttling assembly in the axial direction; a first annular step (21) is provided at the edge of the lower end of the upper tray (2); the upper end of the throttling assembly is sleeved on the first annular step (21) and abuts against the upper tray (2); a second annular step (31) is provided at the edge of the upper end of the lower tray (3); the lower end of the throttling assembly is sleeved on the second annular step (31) and abuts against the lower tray (3); the center rod (4) is axially penetrated through the middle of the upper tray (2) and the lower tray (3) and is fixed to the upper tray (2) and the lower tray (3) so that the upper tray (2) and the lower tray (3) clamp the throttling assembly; and the center rod (4) is used for transmission connection with a processing machine tool.

4. The processing tool according to claim 3, characterized in that: An annular boss (41) is provided on the outer wall of the center rod (4), and the annular boss (41) abuts against the lower end surface of the lower tray (3). The processing tool also includes a gasket (5) and a nut (6), and the gasket (5) and the nut (6) are sequentially sleeved on the outside of the center rod (4) located above the upper tray (2) from bottom to top. The nut (6) is threadedly fastened to the center rod (4) so ​​that the upper tray (2) and the lower tray (3) clamp the throttling assembly. The lower end of the center rod (4) is used for transmission connection with a rotating shaft in a processing machine tool. The middle part of the upper end of the center rod (4) is coaxially provided with an ejector hole (42), and the ejector hole (42) is used for inserting an ejector in the processing machine tool and rotating in cooperation with the ejector.

5. The processing tool according to claim 3 or 4, characterized in that: An upper friction pad (7) is mounted on the top surface of the first annular step (21), and a lower friction pad (8) is mounted on the bottom surface of the second annular step (31); the upper end and the lower end of the throttling assembly are respectively in contact with the upper friction pad (7) and the lower friction pad (8).

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