An adjustable throttling device

Abstract

The present invention relates to an adjustable throttling device, which includes an outer sleeve, a plurality of first inner core columns, a second inner core column, a third inner core column, a limit snap ring, a limit rib, and a limit snap ring; the plurality of first inner core columns, the second inner core column, and the third inner core column are axially fixedly connected in sequence through positioning bosses and positioning grooves, and then axially positioned through the outer sleeve, the limit rib on the outer sleeve, and the limit snap ring. The outer diameter of the second inner core column is smaller than that of the first inner core column. The third inner core column includes an open cylindrical part and an inner hollow cylindrical part, and the outer diameter of the inner hollow cylindrical part is larger than that of the open cylindrical part. In the present invention, when the pressure reduction requirement changes, there is no need to re-design. Only through simple calculation, it is necessary to determine the number of first inner core columns to be selected, as well as to determine the outer cylindrical diameter of the second inner core column and the number and aperture of the throttling holes on the third inner core column, so as to achieve the purpose of reusing a set of devices.

Description

Technical Field

[0001] The present invention relates to a throttling device, and more particularly to an adjustable throttling device that can achieve the purpose of reusing a set of devices without re - designing when the pressure reduction requirement changes, and only needs to determine the number of the first inner core columns, the outer cylindrical diameter of the second inner core column, and the number and aperture of the throttling holes on the third inner core column through simple calculations. Background Art

[0002] At present, the traditional orifice plate flowmeter is for specific working conditions. When the working conditions change, it is necessary to re - design and replace the device, and it is prone to step - type pressure drop and cavitation. When measuring high - temperature and high - pressure fluids, the structure of the orifice plate flowmeter is prone to deformation, and it is easy to have structural changes due to cavitation, resulting in unstable discharge coefficient and low measurement accuracy; impurities are easily deposited in the orifice plate; the outlet flow field is disordered, etc. Summary of the Invention

[0003] Aiming at the above problems, the main object of the present invention is to provide an adjustable throttling device that can achieve the purpose of reusing a set of devices without re - designing when the pressure reduction requirement changes, and only needs to determine the number of the first inner core columns, the outer cylindrical diameter of the second inner core column, and the number and aperture of the throttling holes on the third inner core column through simple calculations.

[0004] The present invention solves the above - mentioned technical problems through the following technical solutions: An adjustable throttling device, the adjustable throttling device includes: an outer sleeve, a plurality of first inner core columns, a second inner core column, a third inner core column, a limit retaining ring, a limit rib, and a limit retaining ring; the plurality of first inner core columns, the second inner core column, and the third inner core column are axially fixedly connected in sequence through positioning bosses and positioning grooves, and then axially positioned through the outer sleeve, the limit rib on the outer sleeve, and the limit retaining ring.

[0005] In a specific embodiment of the present invention, the outer diameter of the second inner core column is smaller than the outer diameter of the first inner core column. The third inner core column includes an open - ended cylindrical portion and an inner - hollow cylindrical portion. The outer diameter of the inner - hollow cylindrical portion is larger than the outer diameter of the open - ended cylindrical portion, and the outer diameter of the open - ended cylindrical portion is smaller than the outer diameter of the second inner core column.

[0006] In a specific embodiment of the present invention, the outer sleeve includes an outer sleeve body, on which a limit rib, a limit card slot, and an outer flange are provided; the limit rib and the limit card slot are located on the inner sides of the upper and lower ends of the outer sleeve body, the outer flange is located on the outer sides of the upper and lower ends of the outer sleeve body, and the limit retaining ring is arranged in the limit card slot.

[0007] In a specific embodiment of the present invention, each first inner core column includes: a first positioning boss, an annular throttling groove, an axial throttling groove, and a first positioning groove; the first positioning boss and the first positioning groove are distributed at the upper and lower ends of the first inner core column, the annular throttling groove radially surrounds the first inner core column, the axial throttling groove is axially arranged on the first inner core column, and the annular throttling groove and the axial throttling groove are communicated.

[0008] In a specific embodiment of the present invention, the second inner core column includes: a second positioning boss, a cylindrical surface, and a second positioning groove; the second positioning boss is butted with the first positioning groove of the first inner core column, and the second positioning groove is butted with the positioning boss on the third inner core column; the second positioning boss, the cylindrical surface, and the second positioning groove are integrally formed.

[0009] In a specific embodiment of the present invention, the third inner core column includes a plurality of radial throttling holes; the radial throttling holes are arranged on the open cylindrical part.

[0010] In a specific embodiment of the present invention, the outer diameter of the second inner core column is 4 / 5 - 9 / 10 of the inner diameter of the outer sleeve.

[0011] In a specific embodiment of the present invention, the inner diameter of the radial throttling hole is 3 / 10 - 2 / 5 of the inner core inner diameter of the third inner core column, and the number is 4 - 6.

[0012] In a specific embodiment of the present invention, the inlet and outlet of the outer sleeve are flange-connected.

[0013] The positive and progressive effects of the present invention are as follows: The adjustable throttling device provided by the present invention has the following advantages:

[0014] (1) For a set of throttling devices, when the pressure reduction requirement changes, there is no need to re-design. Only simple calculations are required to determine the number of the first inner core columns 1 to be selected, and to determine the outer cylindrical diameter of the second inner core column 2 and the number and aperture of the throttling holes on the third inner core column 3, so as to achieve the purpose of reusing a set of devices.

[0015] (2) For the annular flow channel, the fluid is affected by the centrifugal force when advancing in the flow channel, and the pressure gradually decreases, avoiding the stepwise pressure drop of the fluid in the orifice flowmeter, and effectively avoiding the cavitation phenomenon;

[0016] (3) The annular groove medium composed of a plurality of first inner core columns 1 makes a circular motion, and the axial length can be reduced to achieve the pressure reduction purpose. At the same time, the number can be selected to make the pressure drop controllable and adjustable.

[0017] (4) With a certain inner diameter of the outer sleeve, by adjusting the outer diameter of the second inner core column 2, the gap between them can be adjusted, so as to make the pressure drop of this part controllable and adjustable.

[0018] (5) The throttling holes on the third inner core column 3, the number and diameter of the holes are selected according to needs to achieve controllable and adjustable pressure drop.

[0019] (6) After the fluid flows through the annular throttling device, there is basically no backflow, which changes the disadvantage of the disordered flow field at the outlet of the orifice flowmeter, can effectively improve the scaling condition at the back end of the flowmeter, and thus extend the service life of the flowmeter.

[0020] (7) The device of the present invention has a simple structure and is easy to disassemble, assemble and clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the outer sleeve tube of the present invention.

[0022] Figure 2-1 It is an exploded view of other components after removing the outer sleeve tube of the present invention.

[0023] Figure 2-2 It is Figure 2-1 A schematic structural diagram after assembly is completed.

[0024] Figure 2-3 It is Figure 2-1 A longitudinal sectional view of

[0025] Figure 2-4 It is Figure 2-2 A longitudinal sectional view of

[0026] Figure 3 It is a schematic structural diagram of the fluid flow direction of the present invention.

[0027] The following are the names corresponding to the reference numerals in the present invention:

[0028] The first inner core column 1, the second inner core column 2, the third inner core column 3, the outer sleeve tube 4, the limit snap ring 5, the limit rib 6, the limit groove 7, the outer flange 8, the outer sleeve tube body 9;

[0029] The first positioning boss 101, the annular throttling groove 102, the axial throttling groove 103, the first positioning groove 104;

[0030] The second positioning boss 201, the cylindrical surface 202, the second positioning groove 203;

[0031] The open cylindrical part 301, the hollow cylindrical part 302, the radial throttling hole 303. DETAILED DESCRIPTION OF THE INVENTION

[0032] The following provides a preferred embodiment of the present invention in conjunction with the drawings to elaborate in detail on the technical solution of the present invention.

[0033] Figure 1 It is a schematic structural diagram of the outer sleeve tube of the present invention, Figure 2-1Explosion diagram of other components after removing the outer sleeve of the present invention Figure 2-2 is Figure 2-1 structural schematic diagram after assembly Figure 2-3 is Figure 2-1 longitudinal sectional view of Figure 2-4 is Figure 2-2 longitudinal sectional view of Figure 3 structural schematic diagram of the fluid flow direction of the present invention. As shown in the above figures: The adjustable throttling device provided by the present invention includes: an outer sleeve 4, a plurality of first inner core columns 1, a second inner core column 2, a third inner core column 3, a limit retaining ring 5, and a limit rib 6; the plurality of first inner core columns 1, the second inner core column 2, and the third inner core column 3 are axially fixedly connected in sequence through positioning bosses and positioning grooves, and then axially positioned through the outer sleeve 4, the limit rib 6 on the outer sleeve, and the limit retaining ring 5.

[0034] The outer diameter of the second inner core column 2 is smaller than the outer diameter of the first inner core column 1. The third inner core column 3 includes an open cylindrical part 301 and a hollow cylindrical part 302. The outer diameter of the hollow cylindrical part 302 is larger than the outer diameter of the open cylindrical part 301, and the outer diameter of the open cylindrical part 301 is smaller than the outer diameter of the second inner core column 2.

[0035] The outer sleeve 4 includes an outer sleeve body 9. The outer sleeve body 9 is provided with a limit rib 6, a limit card slot 7, and an outer flange 8; the limit rib 6 and the limit card slot 7 are located inside the upper and lower ends of the outer sleeve body 9, the outer flange 8 is located outside the upper and lower ends of the outer sleeve body 10, and the limit retaining ring 5 is arranged in the limit card slot 7.

[0036] Each first inner core column 1 includes: a first positioning boss 101, an annular throttling groove 102, an axial throttling groove 103, and a first positioning groove 104; the first positioning boss 101 and the first positioning groove 104 are distributed at the upper and lower ends of the first inner core column 1. The annular throttling groove 102 is radially wound around the first inner core column 1, and the axial throttling groove 103 is axially arranged on the first inner core column 1. The annular throttling groove 102 and the axial throttling groove 103 are communicated.

[0037] The second inner core column 2 includes: a second positioning boss 201, a cylindrical surface 202, and a second positioning groove 203; the second positioning boss is butted against the first positioning groove 104 of the first inner core column 1, and the second positioning groove is butted against the positioning boss on the third inner core column 3; the second positioning boss 201, the cylindrical surface 202, and the second positioning groove 203 are integrally formed.

[0038] The third inner core column 3 includes a plurality of radial throttling holes 303; the radial throttling holes 303 are arranged on the open cylindrical part 301.

[0039] In the specific implementation process, the outer diameter of the second inner core column 2 is 4 / 5 - 9 / 10 of the inner diameter of the outer sleeve 4. The inner diameter of the radial throttle hole 303 is 3 / 10 - 2 / 5 of the inner core diameter of the third inner core column 3, and the number is 4 - 6. The above parameters can be selected according to specific requirements for other parameters or ranges.

[0040] In the specific implementation process, the inlet and outlet of the outer sleeve 4 are flange-connected.

[0041] In the specific implementation process of the present invention, when the pressure reduction requirement changes, there is no need to redesign. Only through simple calculations, the number of the first inner core columns 1 is selected, and the outer cylindrical diameter of the second inner core column 2 and the number and diameter of the throttle holes on the third inner core column 3 are determined (that is, the adjustable variables are: the number of the first inner core columns 1, the outer cylindrical diameter of the second inner core column 2, the diameter and number of the throttle holes on the third inner core column 3), so as to meet the requirements of different application scenarios and achieve the purpose of reusing a set of devices.

[0042] A number of the first inner core columns 1, the second inner core columns 2, and the third inner core columns 3 are strung together through concave and convex platforms to form an inner core, and are positioned by the upper limit ribs and limit snap rings on the outer sleeve.

[0043] Figure 3 It is a structural schematic diagram of the fluid flow direction of the present invention. As shown in Figure 3: The black arrow indicates the flow direction of the liquid medium. The high-pressure liquid medium flows in from the throttle device flange inlet and can only pass through the annular throttle groove of the first inner core column 1, then through the annular cylindrical gap between the outer circle of the second inner core column 2 and the outer sleeve, reaches the third inner core column 3 and passes through a number of throttle holes on it, and finally flows out from the throttle device outlet flange, completing the purpose of reducing the pressure of the liquid medium from high pressure to low pressure.

[0044] For a set of throttle devices provided by the present invention, when the pressure reduction requirement changes, there is no need to redesign. Only through simple calculations, the number of the first inner core columns 1 is selected, and the outer cylindrical diameter of the second inner core column 2 and the number and diameter of the throttle holes on the third inner core column 3 are determined, so as to achieve the purpose of reusing a set of devices.

[0045] In the annular flow channel of the present invention, the fluid is affected by the centrifugal force when advancing in the flow channel, and the pressure gradually decreases, avoiding the step-like pressure drop of the fluid in the orifice plate flowmeter and effectively avoiding the cavitation phenomenon; the medium in the annular groove composed of a number of the first inner core columns 1 makes a circular motion, and the purpose of reducing pressure can reduce the axial length, and at the same time, the number can be selected to make the pressure drop controllable and adjustable.

[0046] In the present invention, the inner diameter of the outer sleeve is fixed. By adjusting the outer circle diameter of the second inner core column 2, the gap between them is adjusted, so as to make the pressure drop of this part also controllable and adjustable.

[0047] The throttle holes on the third inner core column, the number and diameter of the holes are selected according to needs to achieve controllable and adjustable pressure drop.

[0048] After the fluid flows through the annular throttling device, there is basically no backflow, which changes the disadvantage of the disordered flow field at the outlet of the orifice flowmeter, can effectively improve the scaling condition at the back end of the flowmeter, and thus prolong the service life of the flowmeter.

[0049] The device of the present invention has a simple structure and is easy to disassemble, assemble and clean.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An adjustable throttling device, characterized in that: The adjustable throttling device includes: an outer sleeve, a plurality of first inner core columns, a second inner core column, a third inner core column, a limit snap ring, and a limit rib; the plurality of first inner core columns, the second inner core column, and the third inner core column are axially fixedly connected in sequence through positioning bosses and positioning grooves, and then axially positioned through the outer sleeve, the limit rib on the outer sleeve, and the limit snap ring; The outer diameter of the second inner core column is smaller than the outer diameter of the first inner core column. The third inner core column includes an open cylindrical portion and a hollow cylindrical portion. The outer diameter of the hollow cylindrical portion is larger than the outer diameter of the open cylindrical portion, and the outer diameter of the open cylindrical portion is smaller than the outer diameter of the second inner core column; The outer sleeve includes an outer sleeve body, on which a limit rib, a limit card slot, and an outer flange are provided; the limit rib and the limit card slot are located on the inner sides of the upper and lower ends of the outer sleeve body, the outer flange is located on the outer sides of the upper and lower ends of the outer sleeve body, and the limit snap ring is arranged in the limit card slot; Each first inner core column includes: a first positioning boss, an annular throttling groove, an axial throttling groove, and a first positioning groove; the first positioning boss and the first positioning groove are distributed at the upper and lower ends of the first inner core column, the annular throttling groove is radially wound around the first inner core column, the axial throttling groove is axially arranged on the first inner core column, and the annular throttling groove and the axial throttling groove are communicated; The second inner core column includes: a second positioning boss, a cylindrical surface, and a second positioning groove; the second positioning boss is butted with the first positioning groove of the first inner core column, and the second positioning groove is butted with the positioning boss on the third inner core column; the second positioning boss, the cylindrical surface, and the second positioning groove are integrally formed; The third inner core column includes a plurality of radial throttling holes; the radial throttling holes are arranged on the open cylindrical portion.

2. The adjustable throttling device according to claim 1, characterized in that: The outer diameter of the second inner core column is 4 / 5 - 9 / 10 of the inner diameter of the outer sleeve.

3. The adjustable throttling device according to claim 1, characterized in that: The inner diameter of the radial throttling hole is 3 / 10 - 2 / 5 of the inner core inner diameter of the third inner core column, and the number is 4 - 6.

4. The adjustable throttling device according to claim 1, characterized in that: The inlet and outlet of the outer sleeve are flange-connected.

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