CN109550748B - Gas purging device - Google Patents
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- CN109550748B CN109550748B CN201710876219.1A CN201710876219A CN109550748B CN 109550748 B CN109550748 B CN 109550748B CN 201710876219 A CN201710876219 A CN 201710876219A CN 109550748 B CN109550748 B CN 109550748B
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- 238000010926 purge Methods 0.000 title claims abstract description 63
- 238000004891 communication Methods 0.000 claims abstract description 5
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a gas purging device, which comprises: a body and an air intake assembly, wherein the body defines therein first and second chambers arranged in spaced apart relation, the first chamber having a first inlet and a first outlet to form an air flow, the second chamber having a second inlet and a second outlet to form an air flow, the first outlet communicating with the second chamber and the first outlet being vented toward the second outlet, the first outlet having a size less than a size of the first inlet; the air inlet assembly is in communication with the first inlet to intake air into the first inlet. The gas purging device provided by the embodiment of the invention is an efficient and energy-saving gas multiplication mode, does not need movable equipment and a power supply, is stable and reliable in operation, can realize total gas flow adjustment, is suitable for test benches and industrial platforms with different gas requirements, and is simple in structure, easy to process and manufacture and low in cost, and structural design is carried out based on a compressible gas dynamics principle.
Description
Technical Field
The invention relates to a gas purging and cleaning technology in the field of experiments and industrial production (including energy, electric power, chemical industry, food and the like) and the field of compressible gas dynamics, in particular to a gas purging device which is based on the principle of compressible gas dynamics, is efficient and energy-saving, is universally applicable to occasions requiring cleaning in test benches and industrial platforms and has adjustable flow.
Background
Currently, in the field of industrial production (including energy, electric power, chemical industry, food, etc.) and in the field of testing, test bed pipelines, industrial platform pipelines, equipment external surfaces and auxiliary facility external surfaces, it is often necessary to remove impurities by an air purging method. For pipelines with nominal diameters of less than 600mm and working medium flowing inside, before the pipeline system is put into service (before strength test and tightness test), the pipeline needs to be cleaned in sections and purged by gas, so that the inside of the pipeline is ensured to be clean and dry. After a period of use of the piping system, the interior of the piping is also cleaned by air purging in order to ensure that the interior of the piping is free of impurities. For industrial platforms and thermal hydraulic test benches of energy, electric power and chemical industry, a large air compressor is generally adopted to provide an air source, or the large air compressor is adopted to provide air for a large air storage tank in the bench device and is used as the air source, the pipeline is purged, and the purging flow rate is not less than 20m/s. Because of the large diameter of the pipes in these industrial platforms and thermal hydraulic test benches, the flow rate required for purging is high, and therefore a larger amount of air is required to be provided by the air source, the energy consumption of the large air compressor is also high.
Disclosure of Invention
The present invention aims to solve at least to some extent one of the above technical problems.
Therefore, the invention provides the gas purging device which is efficient, energy-saving, reliable in operation, simple in structure, convenient to process and universally applicable to test benches/industrial platforms.
According to an embodiment of the present invention, a gas purging device includes:
A body defining a first chamber and a second chamber disposed in spaced apart relation therein, the first chamber having a first inlet and a first outlet to form an air flow, the second chamber having a second inlet and a second outlet to form an air flow, the first outlet in communication with the second chamber and the first outlet being vented toward the second outlet, the first outlet having a size less than a size of the first inlet;
And the air inlet assembly is communicated with the first inlet so as to feed air into the first inlet.
According to the gas purging device provided by the embodiment of the invention, the first chamber and the second chamber which are arranged at intervals are limited in the body by adopting the device combining the body and the air inlet assembly, air is introduced into the first inlet through the air inlet assembly, the pressure at the first outlet is reduced because the size of the first outlet is smaller than that of the first inlet, a large amount of gas is conveniently introduced from the second inlet of the second chamber, the gas in the first chamber and the gas in the second chamber are mixed in the second chamber and flow out from the second outlet, so that a large flow of purging gas is formed, the energy consumption of the air inlet assembly is reduced, the high efficiency and the energy saving are realized, the adjustable purging gas amount is realized by adjusting the flow of the air inlet assembly, and the gas purging device is suitable for a pipeline system of a test bench/industrial platform with different purging gas requirements.
In addition, the gas purging device according to the embodiment of the invention can also have the following additional technical characteristics:
According to one embodiment of the present invention, the second chamber is formed in a substantially cylindrical shape, one end of the second chamber is provided with the second inlet, the other end of the second chamber is provided with the second outlet, the first chamber is provided at a side portion of the second chamber, the first inlet is provided at a side portion of the first chamber, the first outlet is provided at a side portion of the second chamber, and the first outlet axis is directed substantially toward the second outlet.
According to one embodiment of the present invention, the first chamber is formed in a ring shape extending in a circumferential direction of the second chamber, one end of the first chamber is flush with one end of the second chamber, and the other end of the first chamber extends to be adjacent to the second outlet and communicates with the second chamber to form the first outlet.
According to one embodiment of the invention, the body comprises:
The shell is approximately formed into a column shape and comprises a first pipe section, a second pipe section and a third pipe section in the axial direction, the first pipe section is formed into a column shape, one end of the first pipe section is provided with the second inlet, the other end of the first pipe section is open, the side part of the first pipe section is provided with the first inlet, one end of the second pipe section is connected with the other end of the first pipe section, the second pipe section is formed into a reducing pipe along the axial direction towards the other end of the second pipe section, the third pipe section is formed into a column shape with the radial dimension smaller than that of the first pipe section, one end of the third pipe section is open and connected with the other end of the second pipe section, and the other end of the third pipe section is provided with the second outlet;
The drainage tube is columnar and inserted into the first tube section and the second tube section, the outer wall surface of the drainage tube is spaced apart from the inner wall surfaces of the first tube section and the second tube section to define the first chamber, the drainage tube is matched with the third tube section to define the second chamber, and the drainage tube is axially spaced apart from the third tube section to define the first outlet.
According to one embodiment of the invention, the radial dimension of the draft tube is equal to the radial dimension of the third tube section.
According to an embodiment of the present invention, the gas purging device of the embodiment of the present invention further includes: the rectifying plate is arranged in the first cavity and located between the first pipe section and the second pipe section, the rectifying plate is formed into an annular shape sleeved on the drainage pipe, and the rectifying plate is provided with a plurality of first through holes penetrating in the thickness direction of the rectifying plate.
According to one embodiment of the invention, the rectifying plate is formed as a grating plate.
According to one embodiment of the invention, one end of the draft tube is open and communicates with the second inlet, and the gas purging device further comprises: the drainage plate is arranged at one end of the drainage tube, and a plurality of second through holes penetrating along the thickness direction of the drainage plate are formed in the drainage plate.
According to one embodiment of the invention, at least a part of the second through holes are arranged at intervals in the radial direction of the drainage plate.
According to one embodiment of the invention, the first tube section, the second tube section and the third tube section are integrally formed.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of a gas purging apparatus according to an embodiment of the invention;
FIG. 2 is a schematic structural view of a rectifying plate of a gas purging device according to an embodiment of the present invention;
FIG. 3 is a schematic view of the structure of a first gas outlet annulus of a gas purging device according to an embodiment of the invention;
FIG. 4 is a schematic view of the structure of a draft tube inlet orifice of a gas sweep apparatus according to an embodiment of the present invention;
FIG. 5 is a graph of the gas flow multiplication factor of a gas purge apparatus according to an embodiment of the invention.
Reference numerals:
A gas purge device 100;
a body 10; a housing 11; drainage tube 12; a first pipe section 13; a second tube section 14; a third pipe section 15;
An air intake assembly 20; an air compressor 21; a gas tank 22; a regulating valve 23; a pressure gauge 24; a flow meter 25;
A first chamber 30; a first inlet 31; a first outlet 32;
A second chamber 40; a second inlet 41; a second outlet 42;
A rectifying plate 50; a first through hole 51;
a drainage tube 60; a second through hole 61; a draft tube inlet orifice 62;
a first gas outlet annulus 70; the first gas flows through the annulus 80.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
A gas purging device 100 according to an embodiment of the present invention is specifically described below with reference to the accompanying drawings.
As shown in fig. 1 to 4, the gas purging device 100 according to the embodiment of the present invention includes a body 10 and a gas inlet assembly 20.
Specifically, the body 10 defines therein first and second chambers 30, 40 arranged in spaced apart relation, the first chamber 30 having a first inlet 31 and a first outlet 32 to form an air flow, the second chamber 40 having a second inlet 41 and a second outlet 42 to form an air flow, the first outlet 32 communicating with the second chamber 40 and the first outlet 32 being vented toward the second outlet 42, the first outlet 32 having a size smaller than the size of the first inlet 31, the air intake assembly 20 communicating with the first inlet 31 to intake air into the first inlet 31.
In other words, the gas purging device 100 according to the embodiment of the present invention is mainly composed of a body 10 and a gas inlet assembly 20, wherein a first chamber 30 and a second chamber 40 are defined in the body 10, the first chamber 30 is spaced apart from and communicates with the second chamber 40, the first chamber 30 has a first inlet 31 and a first outlet 32 to form a gas flow, the gas inlet assembly 20 communicates with the first inlet 31 to deliver a first gas into the first inlet 31, the first gas enters the first chamber 30 through the first inlet 31, and flows out of the first chamber 30 through the first outlet 32, and since the size of the first outlet 32 is smaller than that of the first inlet 31, the flow rate of the first gas at the first outlet 32 is increased and the pressure is decreased. The second chamber 40 has a second inlet 41 and a second outlet 42 to form a gas flow, the first outlet 32 is communicated with the second chamber 40, the first outlet 32 is air-out towards the second outlet 42, the second gas is convenient to flow into the second chamber 40 from the second inlet 41 due to the pressure reduction of the first gas flowing out from the first outlet 32, the second gas flows out from the second outlet 42 after being mixed with the first gas to form a purge gas, and the second outlet 42 is a purge device outlet.
Therefore, according to the gas purging device 100 of the embodiment of the present invention, by adopting the device that combines the body 10 and the gas inlet assembly 20, the first gas is introduced from the first inlet 31, and since the size of the first outlet 32 is smaller than that of the first inlet 31, the flow rate of the first gas flowing out from the first outlet 32 is increased, the pressure is reduced, so that the second gas with large flow rate can be conveniently introduced into the second chamber 40, and the first gas and the second gas are mixed to form the purging gas with large flow rate, thereby reducing the work done by the gas inlet assembly 20, and being a high-efficiency and energy-saving gas multiplication mode.
The first gas flowing in through the first inlet 31 is exemplified by air, the second gas flowing in through the second inlet 41 is exemplified by air, and the second gas is exemplified by compressed air.
According to one embodiment of the invention, the second chamber 40 is formed substantially in a column shape, one end of the second chamber 40 is provided with a second inlet 41, the other end of the second chamber 40 is provided with a second outlet 42, the first chamber 30 is provided at a side of the second chamber 40, the first inlet 31 is provided at a side of the first chamber 30, the first outlet 32 is provided at a side of the second chamber 40 and the first outlet 32 is axially directed substantially towards the second outlet 42.
That is, the gas inlet assembly 20 allows a first gas to enter the first chamber 30 through the first inlet 31 and flow out of the first chamber 30 from the first outlet 32 and into the second chamber 40 and toward the second outlet 42.
Further, the first chamber 30 is formed in a ring shape extending in the circumferential direction of the second chamber 40.
Specifically, one end of the first chamber 30 is flush with one end of the second chamber 40, one end of the first chamber 30 is closed, the other end of the first chamber 30 extends to be adjacent to the second outlet 42 and is communicated with the second chamber 40 to form a first outlet 32, and the first gas flows toward the first outlet 32 and flows out of the first chamber 30 to enter the second chamber 40.
In some embodiments of the present invention, the body 10 includes: a housing 11 and a drain tube 12.
Specifically, the housing 11 is formed substantially in a column shape and includes a first tube section 13, a second tube section 14, and a third tube section 15 in the axial direction, the first tube section 13 is formed in a column shape, one end of the first tube section 13 is provided with a second inlet 41 and the other end is open, the side portion of the first tube section 13 is provided with a first inlet 31, one end of the second tube section 14 is connected to the other end of the first tube section 13, the second tube section 14 is formed into a reducer along the axial direction thereof toward the other end, the third tube section 15 is formed in a column shape having a radial dimension smaller than that of the first tube section 13, one end of the third tube section 15 is open and connected to the other end of the second tube section 14, and the other end of the third tube section 15 is provided with a second outlet 42.
Drain tube 12 is formed in a cylindrical shape and is inserted into first tube segment 13 and second tube segment 14, an outer wall surface of drain tube 12 is spaced apart from an inner wall surface of first tube segment 13 and second tube segment 14 to define a first chamber 30, drain tube 12 cooperates with third tube segment 15 to define a second chamber 40, and drain tube 12 is axially spaced apart from third tube segment 15 to define a first outlet 32.
That is, first chamber 30 is defined by drain tube 12 and first tube segment 13 and second tube segment 14, one end of first chamber 30 is closed, one end is communicated with second chamber 40, the first gas enters first chamber 30 through first inlet 31, the flow rate of the first gas is increased under the action of the reducing tube, the pressure is reduced, the flow rate of the first gas is maximum when the first gas flows out of first chamber 30, the pressure is minimum, a negative pressure can be formed, second chamber 40 is defined by drain tube 12 and third tube segment 15, one end of second chamber 40 is provided with second inlet 41, second inlet 41 can be communicated with the external environment, and because the pressure near first outlet 32 is small, even negative pressure is formed, drain tube 12 can be driven to introduce a large amount of second gas from the external environment.
The first gas outlet annular space 70 is formed at a position where the first outlet 32 communicates with the second chamber 40, and the first gas flow annular space 80 is formed between the first inlet 31 and the first outlet 32 in the first chamber 30.
Further, the radial dimension of the drainage tube 12 is equal to that of the third tube section 15, so that on one hand, the second gas with large flow rate is conveniently introduced, and the second gas and the first gas are mixed to form the purge gas with large flow rate, and on the other hand, the device is conveniently processed, and the production cost is reduced.
Optionally, the gas purging device 100 further comprises: and a rectifying plate 50.
Specifically, the rectifying plate 50 may be disposed in the first chamber 30 and between the first pipe section 13 and the second pipe section 14, the rectifying plate 50 may be formed in a ring shape to be sleeved on the draft tube 12, the rectifying plate 50 may be provided with a plurality of first through holes 51 penetrating in a thickness direction thereof, and the rectifying plate 50 may rectify the first gas flowing at a high speed to obtain a uniform compressed air flow field.
Preferably, the rectification plate 50 may be formed as a grid plate.
According to one embodiment of the present invention, one end of drain tube 12 is open to communicate with second inlet 41, drain tube 12 may introduce a large flow of a second gas through second inlet 41, which communicates with the external environment, and gas purging device 100 further includes: a drainage tube 60.
Specifically, the drain tube 60 is provided at one end of the drain tube 12, the drain tube 60 is provided with a plurality of second through holes 61 penetrating in the thickness direction thereof, the second through holes 61 are provided on a drain tube inlet orifice 62, and the second through holes 61 can be used for filtering larger impurities in the environment.
Preferably, at least a portion of the second through holes 61 are arranged at intervals in the radial direction of the draft tube 60.
Preferably, the first pipe section 13, the second pipe section 14 and the third pipe section 15 are integrally formed, so that not only is the assembly efficiency improved, but also the equipment processing production is facilitated, and the production input cost is reduced.
It should be noted that, the air intake assembly 20 mainly comprises an air compressor 21, an air storage tank 22, a regulating valve 23, a pressure gauge 24 and a flow meter 25, according to the requirement of the test bench/industrial platform for the purge gas, the air compressor 21 provides a first gas with a certain flow rate and pressure, the first gas flows out after stabilizing the pressure by the air storage tank 22, the compressed air flow rate is regulated by the regulating valve 23, and the flow rate and pressure of the first gas are measured by the pressure gauge 24 and the flow meter 25.
In some embodiments of the present invention, the solid wall of the body 10 may be formed as a 304 stainless steel piece, corrosion resistant, and life-prolonging.
In summary, according to the gas purging device 100 of the embodiment of the present invention, by providing the first chamber 30 and the reducer, negative pressure is naturally formed in the first chamber 30, and the second gas is introduced from the external environment through the draft tube 60, so that the work done by the air compressor 21 of the air intake assembly 20 is greatly reduced, which is an efficient and energy-saving gas multiplication mode. Meanwhile, the gas purging device 100 according to the embodiment of the invention does not need any active equipment or power supply, runs stably and reliably, reduces the subsequent maintenance cost, can realize total gas flow adjustment through the flow control of the first gas of the gas inlet assembly 20, and is suitable for test benches and industrial platforms with different gas consumption requirements; in addition, the gas purging device 100 according to the embodiment of the invention is structurally designed based on the principle of compressible gas dynamics, and has the advantages of simple structure, simple processing and manufacturing and low cost.
The invention also provides a calculation method for calculating device structural parameters and gas flow of the gas purging device 100 according to the embodiment of the invention.
The first gas is compressed air and the second gas is air in the external environment.
Let the pressure of the first gas entering from the first inlet 31 be p 1, the density be ρ 1, the flow rate be u 1, the cross-sectional area of the annular chamber flow channel be A 1, the volume flow be Q 1＝ρ1u1, and the mass flow be Q m1＝ρ1u1A1. The first gas from the first gas outlet annulus 70 has a pressure p 2, a density ρ 2, a flow rate u 2, and a cross-sectional flow area A 2.
The pressure of the second gas at the inlet of the draft tube 60 is p 0, the density ρ 0, the flow rate u 0, the flow passage cross-sectional area A 0, and therefore the mass air flow rate from the outside environment is Q m0＝ρ0u0A0. The pressure of the second gas at the position of the first gas outlet annulus 70 is p 3, the density is ρ 3, the flow rate is u 3, and the flow passage sectional area of the draft tube is A 3. Wherein p 3＝p2 is present because the first gas is mixed with the second gas at the location of the first gas outlet annulus 70. The local sound velocity is C.
According to bernoulli's equation, the first gas flow equation:
Second gas flow equation:
First gas mass conservation equation:
ρ1u1A1＝ρ2u2A2 (3)
Second gas mass conservation equation:
ρ0u0A0＝ρ3u3A3 (4)
for the first gas, density and flow rate relationships are based on the principle of compressible gas dynamics:
For the first gas, the velocity coefficient is:
according to the first gas mass conservation equation, the following relation holds:
The velocity coefficient lambda 2 is calculated by iterative solution (7) to obtain the first gas flow velocity u 2 at the location of the first gas outlet annulus 70 and the first gas density ρ 2. According to the first gas flow equation (1), the pressure p 2 at the location of the first gas outlet annulus 70 is obtained.
For the second gas, the relationship between compressible gas density and flow rate:
for the second gas, the velocity coefficient relationship:
And (3) iteratively solving equations (2) (8) (9) to calculate the air flow velocity u 3 in the drainage tube 60 and the first gas density rho 3 of the second gas on the cross section of the position of the first gas outlet annular gap 70, thereby obtaining the air mass flow rho 3u3A3 drained from the external environment, wherein the air mass flow Q m0 is equal to the air mass flow drained from the external environment according to mass conservation.
Thus, the multiplication factor of the mass flow of gas by the body 10 is the ratio of the total flow of gas in the purge device outlet to the first flow of gas provided by the gas inlet assembly 20:
By calculating the multiplication factor of the gas mass flow to be much greater than 2, it is shown that the flow of the second gas introduced from the external environment by the body 10 is much greater than the flow of the first gas provided by the air intake assembly 20, and high efficiency and energy saving are achieved.
As shown in table 1, the structural parameters of the gas purge device were calculated according to the formulas (1) to (10).
TABLE 1
| Parameters (parameters) | Example 1 | Example 2 |
| Working air flow moving ring cavity inner diameter d 1 mm | 200 | 200 |
| The inner diameter d 2 mm of the drainage tube | 100 | 100 |
| Working gas outlet annulus width delta, mm | 0.5 | 0.8 |
| Inlet air density ρ 0,kg/m3 | 1.293 | 1.293 |
| Local sound velocity C, m/s | 340 | 340 |
| Working gas inlet flow rate Q 1,m3/h | 10-130 | 10-130 |
| Gas flow multiplication factor eta, 1 | 47.88-71.66 | 42.63-45.18 |
As shown in fig. 5, the structural parameters of the gas purge apparatus according to the embodiment of the present invention can calculate the gas flow multiplication factor.
According to the gas purging device 100 disclosed by the embodiment of the invention, under the condition that the first gas inlet flow Q1=10-130 m 3/h provided by the air inlet assembly 20 is under the structural parameters of the table 1, the gas flow multiplication coefficient eta=47.88-71.66 shows that the air flow of the second gas obtained by the body 10 through drainage from the external environment is 46.88-70.66 times that of the first gas provided by the air inlet assembly 20, and the calculation shows that the body 10 only depends on the structural design and does not need any active equipment, namely, the work of the air compressor 21 is greatly saved, and the effect of high efficiency and energy conservation is achieved.
In summary, the gas purging device 100 of the embodiment of the present invention is based on the principle of compressible gas dynamics, and is provided with a body 10 (mainly composed of a first gas flow annulus 80, a shrink tube, a first gas outlet annulus 70, a draft tube 60) and a gas inlet assembly 20. The body 10 has no active equipment and simple structure, and realizes multiplication and adjustability of gas flow. The air intake assembly 20 provides a first gas and the ambient atmosphere provides a second gas that are mixed to form a purge gas. According to Bernoulli's equation, the first gas flow rate increases and the pressure decreases as the first gas flows from the shrink tubing to the first gas outlet annulus 70; when the pressure in the annular space 70 of the first gas outlet is reduced to the minimum, and negative pressure is formed, a large amount of air is introduced into the draft tube 60 from the ambient atmosphere, and the first gas and the second gas are mixed in the draft tube 60 and then flow out from the outlet of the purging device, so that a large flow of purging air is formed. According to structural design calculation of the gas purging device 100, the air flow of the second gas introduced from the ambient atmosphere can reach 70 times of the flow of the first gas, meanwhile, no active equipment is arranged in the body 10, no power supply is needed, the gas purging device 100 of the embodiment of the invention greatly reduces the energy consumption of the air compressor 21 in the air inlet assembly 20 under the condition of meeting the purging gas requirement of the same flow, high efficiency and energy saving are realized, and the adjustable purging gas consumption can be realized by adjusting the flow of the first gas through the adjusting valve 23 of the air inlet assembly 20, and the gas purging gas consumption is applicable to the pipeline systems of test benches/industrial platforms with different purging gas requirements.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention.
Claims (8)
1. A gas purge apparatus, comprising:
A body defining therein first and second chambers arranged in spaced apart relation, the first chamber having a first inlet and a first outlet to form a gas flow, the second chamber having a second inlet and a second outlet to form a gas flow, the first outlet communicating with the second chamber and the first outlet being vented toward the second outlet, the first outlet being of a smaller size than the first inlet, a first gas entering the first chamber through the first inlet, a second gas flowing from the second inlet into the second chamber, a first gas outlet annulus being formed at a location where the first outlet communicates with the second chamber, a first gas flow annulus being formed in the first chamber between the first inlet and the first outlet, the first gas and the second gas mixing in the second chamber and exiting from the second outlet;
an air intake assembly in communication with the first inlet for intake of air into the first inlet;
The body includes:
The shell is approximately formed into a column shape and comprises a first pipe section, a second pipe section and a third pipe section in the axial direction, the first pipe section is formed into a column shape, one end of the first pipe section is provided with the second inlet, the other end of the first pipe section is open, the side part of the first pipe section is provided with the first inlet, one end of the second pipe section is connected with the other end of the first pipe section, the second pipe section is formed into a reducing pipe along the axial direction towards the other end of the second pipe section, the third pipe section is formed into a column shape with the radial dimension smaller than that of the first pipe section, one end of the third pipe section is open and connected with the other end of the second pipe section, and the other end of the third pipe section is provided with the second outlet;
The drainage tube is columnar and inserted into the first tube section and the second tube section, the outer wall surface of the drainage tube is spaced from the inner wall surfaces of the first tube section and the second tube section to define a first chamber, the drainage tube is matched with the third tube section to define a second chamber, the drainage tube is axially spaced from the third tube section to define a first outlet, and the first chamber is formed into an annular shape extending along the circumferential direction of the second chamber;
The rectifying plate is arranged in the first cavity and located between the first pipe section and the second pipe section, the rectifying plate is formed into an annular shape sleeved on the drainage pipe, and the rectifying plate is provided with a plurality of first through holes penetrating in the thickness direction of the rectifying plate.
2. A gas purge apparatus according to claim 1, wherein the second chamber is formed substantially in a column shape, one end of the second chamber is provided with the second inlet, the other end of the second chamber is provided with the second outlet, the first chamber is provided at a side portion of the second chamber, the first inlet is provided at a side portion of the first chamber, the first outlet is provided at a side portion of the second chamber and the first outlet axis is substantially directed toward the second outlet.
3. A gas purge apparatus according to claim 2, wherein the first chamber is formed in a ring shape extending in a circumferential direction of the second chamber, one end of the first chamber is flush with one end of the second chamber, and the other end of the first chamber extends to be adjacent to the second outlet and communicates with the second chamber to form the first outlet.
4. A gas purge arrangement according to claim 1, wherein the radial dimension of the draft tube is equal to the radial dimension of the third tube section.
5. A gas purging device as claimed in claim 1, wherein the rectifying plate is formed as a grating plate.
6. The gas purging device as set forth in claim 1, wherein one end of said draft tube is open in communication with said second inlet, said gas purging device further comprising: the drainage plate is arranged at one end of the drainage tube, and a plurality of second through holes penetrating along the thickness direction of the drainage plate are formed in the drainage plate.
7. The gas purging device as recited in claim 6, wherein at least a portion of the second through holes are spaced apart along a radial direction of the flow directing plate.
8. The gas purging device as recited in claim 1, wherein the first tube segment, the second tube segment, and the third tube segment are integrally formed.
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| CN201710876219.1A CN109550748B (en) | 2017-09-25 | 2017-09-25 | Gas purging device |
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| CN201710876219.1A CN109550748B (en) | 2017-09-25 | 2017-09-25 | Gas purging device |
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| CN113020140A (en) * | 2019-12-09 | 2021-06-25 | 中国科学院大连化学物理研究所 | In-situ cleaning method for ion transfer tube |
| CN112701327B (en) * | 2020-12-29 | 2021-11-30 | 浙江高成绿能科技有限公司 | Air-cooled fuel cell purging system and shutdown method thereof |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000110569A (en) * | 1998-08-04 | 2000-04-18 | Toyota Motor Corp | Assist gas system for internal combustion engine |
| CN1321240A (en) * | 1999-09-07 | 2001-11-07 | 罗伯特·博施有限公司 | Device for measuring at least one parameter of flowing medium |
| CN1497083A (en) * | 2002-10-18 | 2004-05-19 | 津田驹工业株式会社 | Weft insertion nozzles for fluid jet looms |
| WO2008017567A1 (en) * | 2006-08-11 | 2008-02-14 | Team Smartfish Gmbh | Air inlet for a jet engine |
| CN201632240U (en) * | 2010-02-25 | 2010-11-17 | 横店集团东磁股份有限公司 | Air mixing nozzle |
| JP2011200807A (en) * | 2010-03-26 | 2011-10-13 | Jfe Engineering Corp | Method for mixing fluid and apparatus for mixing the fluid |
| CN102352956A (en) * | 2011-09-22 | 2012-02-15 | 吴强 | Rapid inflation gun |
| CN102770041A (en) * | 2010-02-04 | 2012-11-07 | 许景贤 | Breathable ventilation insole with air-enhancing effect |
| CN103350042A (en) * | 2013-06-17 | 2013-10-16 | 宁波奥特唯工具有限公司 | Siphonic energy-saving blowing gun |
| CN104534530A (en) * | 2014-10-24 | 2015-04-22 | 周月生 | No-clean range hood |
| CN204397374U (en) * | 2014-12-27 | 2015-06-17 | 漳州市福世通电子有限公司 | A kind of Working table structure of wiring board digital control drilling machine |
| CN106076685A (en) * | 2016-07-27 | 2016-11-09 | 无锡宙斯环保喷雾设备制造有限公司 | A kind of two-fluid spray spray gun |
| CN205868578U (en) * | 2016-07-15 | 2017-01-11 | 王龙 | Increase rascally rifle |
| CN206018623U (en) * | 2016-08-30 | 2017-03-15 | 浙江苏泊尔家电制造有限公司 | Burner and the gas-cooker with which |
| WO2017122260A1 (en) * | 2016-01-12 | 2017-07-20 | 正裕 井尻 | Supercharging device of internal combustion engine |
| CN207628847U (en) * | 2017-09-25 | 2018-07-20 | 国家电投集团科学技术研究院有限公司 | Gas purging device |
-
2017
- 2017-09-25 CN CN201710876219.1A patent/CN109550748B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000110569A (en) * | 1998-08-04 | 2000-04-18 | Toyota Motor Corp | Assist gas system for internal combustion engine |
| CN1321240A (en) * | 1999-09-07 | 2001-11-07 | 罗伯特·博施有限公司 | Device for measuring at least one parameter of flowing medium |
| CN1497083A (en) * | 2002-10-18 | 2004-05-19 | 津田驹工业株式会社 | Weft insertion nozzles for fluid jet looms |
| WO2008017567A1 (en) * | 2006-08-11 | 2008-02-14 | Team Smartfish Gmbh | Air inlet for a jet engine |
| CN102770041A (en) * | 2010-02-04 | 2012-11-07 | 许景贤 | Breathable ventilation insole with air-enhancing effect |
| CN201632240U (en) * | 2010-02-25 | 2010-11-17 | 横店集团东磁股份有限公司 | Air mixing nozzle |
| JP2011200807A (en) * | 2010-03-26 | 2011-10-13 | Jfe Engineering Corp | Method for mixing fluid and apparatus for mixing the fluid |
| CN102352956A (en) * | 2011-09-22 | 2012-02-15 | 吴强 | Rapid inflation gun |
| CN103350042A (en) * | 2013-06-17 | 2013-10-16 | 宁波奥特唯工具有限公司 | Siphonic energy-saving blowing gun |
| CN104534530A (en) * | 2014-10-24 | 2015-04-22 | 周月生 | No-clean range hood |
| CN204397374U (en) * | 2014-12-27 | 2015-06-17 | 漳州市福世通电子有限公司 | A kind of Working table structure of wiring board digital control drilling machine |
| WO2017122260A1 (en) * | 2016-01-12 | 2017-07-20 | 正裕 井尻 | Supercharging device of internal combustion engine |
| CN205868578U (en) * | 2016-07-15 | 2017-01-11 | 王龙 | Increase rascally rifle |
| CN106076685A (en) * | 2016-07-27 | 2016-11-09 | 无锡宙斯环保喷雾设备制造有限公司 | A kind of two-fluid spray spray gun |
| CN206018623U (en) * | 2016-08-30 | 2017-03-15 | 浙江苏泊尔家电制造有限公司 | Burner and the gas-cooker with which |
| CN207628847U (en) * | 2017-09-25 | 2018-07-20 | 国家电投集团科学技术研究院有限公司 | Gas purging device |
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|---|---|
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