CN212228124U - Intake flow nozzle assembly and intake flow measuring device - Google Patents
Intake flow nozzle assembly and intake flow measuring device Download PDFInfo
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- CN212228124U CN212228124U CN202021261039.6U CN202021261039U CN212228124U CN 212228124 U CN212228124 U CN 212228124U CN 202021261039 U CN202021261039 U CN 202021261039U CN 212228124 U CN212228124 U CN 212228124U
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Abstract
The utility model relates to a gas turbine inlet flow test equipment technical field especially relates to an inlet flow nozzle assembly and inlet flow measuring device. The air inlet flow nozzle assembly comprises a plurality of nozzle flow meters and a connecting seat with a plurality of connecting through holes which are arranged in an array manner, wherein the nozzle flow meters are arranged in the connecting through holes in a one-to-one correspondence manner; the predetermined number of nozzle flowmeters which are uniformly distributed relative to the connecting seat in the plurality of nozzle flowmeters can be simultaneously started so that the upper measurement limit of the air inflow nozzle assembly reaches the predetermined air inflow. The air inlet flow nozzle assembly and the air inlet flow measuring device are combined with a preset number of nozzle flow meters, so that the air inlet flow nozzle assembly and the air inlet flow measuring device can be suitable for air inlet flow measurement of gas turbine tests of various models and power grades, and are high in flexibility.
Description
Technical Field
The utility model relates to a gas turbine inlet flow test equipment technical field especially relates to an inlet flow nozzle assembly and inlet flow measuring device.
Background
The air inlet flow of the turbine is accurately measured, and the method is of great importance in the aspects of calculation of the performance of the turbine, surge analysis of the gas compressor and the like. A conventional test bed for the whole turbine is characterized in that a twisted-pair flow tube is connected to an air inlet channel to perform an air inlet flow measurement test.
In the related art, the measurement accuracy of the flow tube has a requirement on the Mach number of the inlet air, and the Mach number of the inlet air is not applicable due to the fact that the flow tube is too large in size, so that the flow tube with a small size is required to be used for measuring the heavy-duty turbine on the ground. However, the smaller size of the flow tube means that only a small range of intake air flow can be measured, and when the required intake air flow of the turbine to be tested exceeds the measurement range of the flow tube, the problem that the flow tube is not suitable or the measurement result is inaccurate is caused, so that the existing flow tube cannot be used for measuring the intake air of turbines with various models and different power levels, and the flexibility is low.
SUMMERY OF THE UTILITY MODEL
A first object of the utility model is to provide an inlet flow nozzle assembly to solve to a certain extent among the prior art because the inlet flow pipe can only measure the inlet flow in less within range, lead to the inlet flow pipe can only be applicable to the gas turbine inlet flow test of less model, power level.
A second object of the present invention is to provide an intake air flow measuring device to solve to a certain extent in the prior art because intake air flow measuring device can only measure the intake air flow in the less scope, lead to intake air flow measuring device can only be applicable to the gas turbine intake air flow test of less model, power level.
In order to achieve the above object, the present invention provides the following technical solutions;
based on the first purpose, the utility model provides an air inlet flow nozzle assembly, including a plurality of nozzle flow meters and a connecting seat with a plurality of connecting through holes arranged in an array, the nozzle flow meters are arranged in the connecting through holes in a one-to-one correspondence manner;
and a predetermined number of the nozzle flow meters which are uniformly distributed relative to the connecting seat in the plurality of nozzle flow meters can be simultaneously started so that the air inflow measuring range of the air inflow nozzle assembly reaches a predetermined air inflow.
In any of the above technical solutions, optionally, the plurality of connecting through holes are arranged in a matrix array.
In any of the above technical solutions, optionally, the plurality of connecting through holes are arranged in a multi-layer surrounding form in an array.
In any of the above technical solutions, optionally, the intake flow nozzle assembly further includes a stop plate, the nozzle flowmeter is detachably disposed in the connection through hole, and the stop plate is detachably plugged in the connection through hole.
In any of the above technical solutions, optionally, the intake flow nozzle assembly further includes a plugging assembly, the plugging assembly includes a sealing cover, a plugging blind plate, and a through-flow orifice plate, the nozzle flow meter is provided with a slot, the slot is located between the connecting plate and an outlet of the nozzle flow meter, the sealing cover is detachably covered on an inlet of the nozzle flow meter, and the plugging blind plate and the through-flow orifice plate are detachably disposed in the slot.
Based on the second objective, the utility model provides an intake flow measuring device, including intake pipe, connecting pipe and the intake flow nozzle assembly as described in any of the above technical solutions;
the connecting seat of the air inlet flow nozzle assembly is connected between the outlet of the air inlet pipe and the inlet of the connecting pipe, the inlet of the nozzle flow meter of the air inlet flow nozzle assembly is communicated with the outlet of the air inlet pipe, the outlet of the nozzle flow meter is detachably communicated with the inlet of the connecting pipe, and the outlet of the connecting pipe is used for being communicated with the air inlet chamber of the device to be tested.
In any of the above technical solutions, optionally, the connecting seat includes a first connecting seat and a second connecting seat, and the connecting through hole penetrates through the first connecting seat and the second connecting seat;
the intake air flow measuring device also comprises a diffuser pipe and a rectifying chamber; the rectifying chamber is connected between the outlet of the air inlet pipe and the first connecting seat, the inlet of the nozzle flow meter penetrates through the first connecting seat and extends into the rectifying chamber, and a silencer and a filtering device which are sequentially arranged along the airflow direction are arranged in the rectifying chamber;
the diffuser pipe is connected between the second connecting seat and the inlet of the connecting pipe, the outlet of the nozzle flowmeter penetrates through the second connecting seat and extends into the diffuser pipe, and the diffuser pipe extends for a first preset distance along the airflow flow in a diameter expansion shape.
In any of the above technical solutions, optionally, a pipe wall of the rectification chamber is further provided with a first access door located between the muffler and the filtering device, and a second access door located between the filtering device and the first connecting seat;
and a third access door is arranged on the pipe wall of the diffuser pipe and is positioned at the inlet of the diffuser pipe.
In any one of the above technical solutions, optionally, the intake air flow measuring device further includes a plenum and a reducer connected in sequence between the diffuser pipe and the connecting pipe along the airflow direction;
the pressure stabilizing chamber is in a constant diameter shape and extends for a second preset distance along the airflow direction, the reducer pipe is in a reducing shape and extends for a third preset distance along the airflow direction, and the second preset distance and the third preset distance are smaller than the first preset distance.
In any of the above technical solutions, optionally, the intake air flow measuring device further includes a turning pipe communicated between the reducer pipe and the connecting pipe, where the turning pipe includes a plurality of sub-pipes connected in sequence along the airflow direction, and an included angle is formed between the length directions of two adjacent sub-pipes;
the flow guide plate is arranged at the joint of the two sub-pipes in the steering pipe and comprises a first flow guide part, a second flow guide part and a transition part which are sequentially connected along the flow direction of air flow, the length direction of the first flow guide part and the length direction of the second flow guide part form an included angle, and the transition part is in a smooth transition shape.
Adopt above-mentioned technical scheme, the beneficial effects of the utility model are that:
the utility model provides an air inlet flow nozzle assembly includes a plurality of nozzle flow meters and has a plurality of connect the through-hole's that the array was arranged connecting seat, and the nozzle flow meter one-to-one sets up in the through-hole that connects. The method comprises the steps of determining preset air inflow according to test requirements of a device to be tested, determining a preset number of nozzle flowmeters which are simultaneously started in a plurality of nozzle flowmeters according to the preset air inflow, uniformly distributing all the started nozzle flowmeters relative to a connecting seat, summing measurement results of the preset number of nozzle flowmeters to obtain the air inflow of the device to be tested, and therefore the air inflow nozzle assembly is suitable for air inflow tests of gas turbines of various models and power grades by combining the preset number of nozzle flowmeters, and is high in flexibility.
The utility model provides an air inlet flow measuring device, including foretell air inlet flow nozzle assembly, therefore can realize all beneficial effects of this air inlet flow nozzle assembly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a first embodiment of an intake flow nozzle assembly according to the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 at view A (nozzle flow meter omitted);
fig. 3 is a second schematic structural view of an intake flow nozzle assembly according to an embodiment of the present invention;
FIG. 4 is a schematic view of a through-flow orifice plate of an inlet flow nozzle assembly according to an embodiment of the present invention;
FIG. 5 is a schematic view of a blind sealing hole of an inlet flow nozzle assembly according to an embodiment of the present invention;
FIG. 6 is a schematic view of eight arrangements of the intake flow nozzle assembly shown in FIG. 1 or FIG. 3, a, b, c, d, e, f, g, h;
fig. 7 is a third schematic view of an intake flow nozzle assembly according to an embodiment of the present invention;
fig. 8 is a schematic structural view of an intake flow rate testing device according to a second embodiment of the present invention.
Icon: 1, an air inlet pipe; 2-a silencer; 3-a filtration device; 4-a rectification chamber; 51-a first access door; 52-a second access door; 53-a third access door; 6-nozzle flow meter; 7-a first connection seat; 8-a second connecting seat; 9-a diffuser pipe; 10-a pressure stabilizing chamber; 11-a reducer pipe; 12-a steering tube; 13-a deflector; 14-a connecting tube; 16-a seal; 17-a connecting flange; 18-a stopper plate; 19-sealing the cover; 20-plugging a blind plate; 21-a through-flow orifice plate; 22-connecting vias.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
The intake flow nozzle assembly provided by the embodiment is used for an intake flow measuring device.
Referring to fig. 1 to 7 in combination with fig. 8, the intake flow nozzle assembly of the present embodiment includes a plurality of nozzle flow meters 6 and a connection base having a plurality of connection through holes 22 arranged in an array, and the nozzle flow meters 6 are disposed in the connection through holes 22 in a one-to-one correspondence. Each of the nozzle flow meters 6 is provided with a support and fixing function by a connection base provided with a connection through-hole 22, so that a plurality of nozzle flow meters 6 are combined to form an intake flow nozzle assembly.
The predetermined number of nozzle flow meters 6 among the plurality of nozzle flow meters 6, which are uniformly arranged with respect to the connection base, can be simultaneously turned on to reach a predetermined intake air flow rate through the intake air flow rate measurement range of the intake air flow rate nozzle assembly. Wherein the predetermined number is a positive integer not less than one and not more than the total number of the nozzle flow meters 6. By uniformly arranged, it is meant that the intake cross-sections of a predetermined number of nozzle flow meters 6 form a rotationally symmetrical pattern.
Because the air inlet flow nozzle assembly is used as an air flow channel when the air inlet flow is measured, the nozzle flow meters 6 with the preset number are uniformly distributed on the connecting seat, the measuring result of the air inlet flow nozzle assembly can be closer to the measuring result measured by one flow tube, so that the accuracy of the measuring result is improved, the uniformity of the air flow flowing out of the air inlet flow nozzle assembly can be improved, and more uniform air inlet flow is provided for a device to be tested.
Optionally, the intake flow nozzle assembly comprises two, three, four, five, etc. nozzle flow meters 6.
Alternatively, the plurality of nozzle flow meters 6 are all the same in model and specification, so that the intake flow nozzle assembly can be adapted to devices to be tested of various models and various power levels by adjusting the size of the predetermined number. Specifically, if the upper limit value of the intake air flow rate of the device under test is small, the intake air flow nozzle assembly can be adapted for the intake air flow rate test of the device under test by reducing the predetermined number. If the upper limit value of the intake air flow rate of the device to be tested is large, the intake air flow nozzle assembly can be adapted for the intake air flow rate test of the device to be tested by increasing a predetermined number. This adjustment is simple and easy to operate, facilitating rapid determination of the predetermined quantity based on the predetermined intake air flow rate.
Optionally, the plurality of nozzle flow meters 6 includes a plurality of models and specifications of nozzle flow meters 6, so that the combination strategy can be adjusted according to the model specifications of the nozzle flow meters 6, so that the intake air flow nozzle assembly is suitable for the devices to be tested with a plurality of models and power levels. This adjustment is advantageous for achieving differential adjustment and fine adjustment of the predetermined intake air flow rate.
Alternatively, the nozzle flow meter 6 is not limited to a twisted pair nozzle flow meter.
Optionally, a seal 16 is provided between the nozzle flow meter 6 and the connecting through bore 22.
The intake flow nozzle assembly in this embodiment includes a plurality of nozzle flow meters 6 and a connection seat having a plurality of connection through holes 22 arranged in an array, and the nozzle flow meters 6 are disposed in the connection through holes 22 in a one-to-one correspondence. The method comprises the steps of determining preset air inflow according to test requirements of a device to be tested, determining a preset number of nozzle flowmeters 6 which are simultaneously opened in a plurality of nozzle flowmeters 6 according to the preset air inflow, enabling all the opened nozzle flowmeters 6 to be uniformly distributed relative to a connecting seat, summing measurement results of the preset number of nozzle flowmeters 6 to obtain the air inflow of the device to be tested, and therefore the air inflow nozzle assembly is suitable for air inflow tests of gas turbines of various models and power grades by combining the preset number of nozzle flowmeters 6.
In an alternative of this embodiment, the predetermined intake air flow rate is m, the predetermined number is n, and the relationship between n and m is: n is through A/A1Rounding up to obtain A ═ f (m), A is the total cross-sectional area of the device to be tested which needs to be provided by the air inlet flow nozzle component, and A is1The cross-sectional area of the nozzle flow meter 6.
That is, the predetermined intake air flow rate is determined based on the estimated intake air amount of the device under test, and the cross-sectional area of the flow meter 6 at each nozzle is A1On the premise that the total cross-sectional area A required to be provided by the nozzle flowmeter can be calculated according to the preset air inflow, so that the total cross-sectional area A can be calculated according to A and A1Together defining a predetermined number n. It should be noted that when n is not an integer, n is determined by rounding up.
Specifically, the specific relationship between the total cross-sectional area a provided by the nozzle flow meter required by the device to be tested and the predetermined air inflow m is as follows: and a ═ f (m, P, T, Ma), where P is the predetermined operating pressure, T is the predetermined operating temperature, and Ma is the mach number of the gas stream inside the nozzle flow meter. Namely, the predetermined number n is determined by comprehensively considering the influence of m, P, T and Ma, so that the accuracy of the predetermined number n can be further improved, and the matching degree of the predetermined air inlet flow of the air inlet flow nozzle assembly and the estimated air inlet amount of the device to be tested can be further improved.
Where a ═ f (m, P, T, Ma) specifically means m ═ K × a × P × q/√ T, the coefficient K is the adiabatic index of the gas, q is the reduced flow rate, where K is the adiabatic index and λ is the dimensionless velocity, and for a given value of K, the number of Ma corresponds one to λ. Specifically, the method comprises the following steps:
optionally, the mach number Ma of the gas flow inside the nozzle flow meter ranges from 0.2 to 0.6.
In an alternative of this embodiment, as shown in fig. 2, a plurality of the connection through holes 22 are arranged in a matrix array.
For example, as shown in fig. 6, the number of the connecting through holes 22 is nine, and the nine connecting through holes 22 are arrayed in a 3-step matrix, wherein a, b, c, d, e, f, g, h of fig. 6 sequentially show the predetermined number of nine, eight, seven, six, five, four, three, and one. The nozzle flow meter 6 is shown in the closed state by means of cross-hatching, and the remaining unfilled circle shows the nozzle flow meter 6 in the open state.
In an alternative of this embodiment, shown in fig. 7, the connecting through-holes 22 are arrayed in a multi-layer surrounding form. For example, the number of the connecting through holes 22 is nine, and the nine connecting through holes 22 are arranged in an array in a manner that eight connecting through holes 22 uniformly surround one connecting through hole 22, that is, in a two-layer surrounding manner.
In an alternative of this embodiment, as shown in fig. 1, the intake flow nozzle assembly further includes a stopper plate 18, the nozzle flow meter 6 is detachably disposed in the connecting through hole 22, and the stopper plate 18 is detachably plugged in the connecting through hole 22. Specifically, the nozzle flowmeter 6 is closed in a mode that the nozzle flowmeter 6 is detached from the connecting seat, and then the connecting through hole 22 after the nozzle flowmeter 6 is detached is plugged through the stop plate 18, so that the air flow is prevented from flowing through the connecting through hole 22 beyond the nozzle flowmeter 6, all the air flow flowing through the nozzle flowmeters 6 with the preset number is guaranteed, and the accuracy of the air flow test of the device to be tested is guaranteed.
Optionally, the stop plate 18 is a bulkhead flange. In order to improve the convenience of assembling and disassembling the blank flange, the connecting flange 17 which can be detachably connected with the blank flange is welded at the periphery of the connecting seat corresponding to the connecting through hole 22.
In an alternative of this embodiment, referring to fig. 3, the intake flow nozzle assembly further includes a plugging assembly, the plugging assembly includes a sealing cap 19, a plugging blind plate 20, and a through-flow orifice plate 21, the nozzle flow meter 6 is provided with a slot, the slot is located between the connection plate and an outlet of the nozzle flow meter 6, the sealing cap 19 is detachably covered on an inlet of the nozzle flow meter 6, and the plugging blind plate 20 and the through-flow orifice plate 21 are detachably disposed in the slot.
Specifically, the nozzle flow joint is closed by covering the sealing cover 19 on the inlet of the nozzle flow meter 6 and inserting the blind plugging plate 20 into the insertion slot, so that the sealing cover 19 forms a stopping effect on the air flow at the inlet of the nozzle flow meter 6, and the blind plugging plate 20 forms a stopping effect on the air flow at the outlet of the nozzle flow meter 6.
Alternatively, as shown in FIG. 4, the perforated plate 21 is a flange with a hole in the middle. Referring to fig. 5, the blind plugging plate 20 is a plate-type flat plate blind plate.
Alternatively, the blind plugging plate 20 and the perforated plate 21 are formed integrally using an existing 8-shaped blind plate.
Example two
The second embodiment provides an intake flow measuring device, which comprises the intake flow nozzle assembly of the first embodiment, and the technical features of the intake flow nozzle assembly disclosed in the first embodiment are also applicable to the second embodiment, and the technical features of the intake flow nozzle assembly disclosed in the first embodiment are not repeated.
Referring to fig. 8 in combination with fig. 1 to 7, the intake air flow measuring device provided in the present embodiment includes an intake pipe 1, a connecting pipe 14, and the intake air flow nozzle assembly of the first embodiment.
The connecting seat of the air inlet flow nozzle assembly is connected between the outlet of the air inlet pipe 1 and the inlet of the connecting pipe 14, the inlet of the nozzle flowmeter 6 of the air inlet flow nozzle assembly is communicated with the outlet of the air inlet pipe 1, the outlet of the nozzle flowmeter 6 can be detachably communicated with the inlet of the connecting pipe 14, and the outlet of the connecting pipe 14 is used for being communicated with an air inlet of a device to be tested.
Optionally, the device to be tested is a turbine, in particular a gas turbine.
The intake flow measuring device includes an intake pipe 1, a connecting pipe 14, and an intake flow nozzle assembly. The air inlet pipe 1 is arranged to play a role in gathering inlet air flow, and the inlet air flow nozzle assembly is connected with the device to be tested through the connecting pipe 14 so as to measure the inlet air flow of the device to be tested through the inlet air flow nozzle assembly. In addition, because the outlet of the nozzle flowmeter 6 is detachably communicated with the inlet of the connecting pipe 14, the specification of the connecting pipe 14 can be changed according to different devices to be tested so as to adapt to various relative position relations of the devices to be tested and the air inlet flow nozzle assembly on the spatial layout.
In an alternative of this embodiment, the connection holder includes a first connection holder 7 and a second connection holder 8, and the connection through-hole 22 penetrates the first connection holder 7 and the second connection holder 8. Optionally, the first connecting seat 7 and the second connecting seat 8 are both flanges provided with a plurality of connecting through holes 22.
The intake air flow measuring device also comprises a diffuser pipe 9 and a rectification chamber 4; the rectifying chamber 4 is connected between the outlet of the air inlet pipe 1 and the first connecting seat 7, the inlet of the nozzle flowmeter 6 penetrates through the first connecting seat 7 and extends into the rectifying chamber 4, and the silencer 2 and the filtering device 3 which are sequentially arranged along the air flow direction are arranged in the rectifying chamber 4.
The rectifying chamber 4 is arranged between the air inlet pipe 1 and the first connecting seat 7, so that the inlet air flow is adjusted to be a stable and uniform flow field, the impact influence on the nozzle flowmeter 6 is reduced, and the measurement precision of the nozzle flowmeter 6 is improved. In addition, through setting up filter equipment 3, can improve the cleanliness factor of the air current that enters into in the nozzle flow meter 6, avoid impurity shutoff nozzle flow meter 6 to improve the stability of nozzle flow meter 6 work, reduce the maintenance frequency.
Optionally, in the test process, the device to be tested does not need to operate for a long time, so that the filtering device 3 only needs to perform rough filtering, the cost is reduced, and the pressure loss of the intake airflow in the intake flow measuring device is reduced.
By providing the muffler 2, optionally, the muffler 2 is provided at the joint between the intake pipe 1 and the rectification chamber 4, the sound attenuation effect can be improved.
The diffuser pipe 9 is connected between the second connecting seat 8 and the inlet of the connecting pipe 14, the outlet of the nozzle flowmeter 6 penetrates through the second connecting seat 8 and extends into the diffuser pipe 9, and the diffuser pipe 9 extends for a first preset distance along the airflow flow in a diameter expansion shape. The diffusion and deceleration effect on the air inlet flow can be achieved by arranging the diffusion pipe 9, so that the flow speed of the air inlet flow is reduced to meet the flow speed requirement of an air inlet chamber of the device to be tested.
Alternatively, in order to improve the connection sealing performance between the rectifying chamber 4 and the first connecting seat 7, the outer peripheral side wall of the first connecting seat 7 is welded to the inner peripheral side wall of the diffuser pipe 9; in order to improve the connection sealability between the diffuser pipe 9 and the second coupling seat 8, the outer circumferential side wall of the second coupling seat 8 is welded to the inner circumferential side wall of the diffuser pipe 9.
In an alternative of this embodiment, the duct wall of the rectification chamber 4 is further provided with a first access door 51 and a second access door 52. The first access door 51 is located between the muffler 2 and the filtering device 3, and the second access door 52 is located between the filtering device 3 and the first connection seat 7, by providing the first access door 51 and the second access door 52, it is possible to install and service the muffler 2 and the filtering device 3.
The pipe wall of the diffuser pipe 9 is provided with a third access door 53, and the third access door 53 is arranged at the inlet of the diffuser pipe 9, so that the filter device 3 and the intake flow nozzle assembly can be conveniently installed and maintained by arranging the second access door 52 and the third access door 53.
In an alternative of this embodiment, the intake air flow rate measuring device further includes a surge tank 10 and a reducer pipe 11 connected in series between the diffuser pipe 9 and the connecting pipe 14 in the flow direction of the air flow.
The pressure stabilizing chamber 10 is in a constant-diameter shape and extends for a second preset distance along the airflow direction, the second preset distance is smaller than the first preset distance, and the pressure stabilizing chamber 10 can play a role in stabilizing the flow speed and homogenizing the flow field of the intake airflow after being decelerated by the diffuser pipe 9.
The reducer 11 is reduced in diameter and extends for a third predetermined distance along the airflow direction, and the third predetermined distance is smaller than the first predetermined distance. The reducer pipe 11 plays a role in reducing between the connecting pipe 14 and the pressure stabilizing chamber 10, so that the standardized connecting pipe 14 is convenient to adopt, and the convenience of test operation is improved.
In an alternative of this embodiment, the intake air flow measuring device further includes a turning pipe 12 communicated between the reducer pipe 11 and the connecting pipe 14, the turning pipe 12 includes a plurality of sub-pipes connected in sequence along the airflow direction, and an included angle is formed between the length directions of two adjacent sub-pipes, so that the problem that the inlet of the connecting pipe 14 and the outlet of the reducer pipe 11 are not arranged oppositely can be overcome by providing the turning pipe 12.
Optionally, the steerer tube 12 is a standardized elbow.
A guide plate 13 is arranged at the joint corresponding to the two sub-pipes in the steering pipe 12, the guide plate 13 comprises a first guide part, a second guide part and a transition part which are sequentially connected along the airflow direction, the length direction of the first guide part and the length direction of the second guide part form an included angle, and the transition part is in a smooth transition shape. Specifically, along the airflow direction, the two sub-pipes are respectively a first sub-pipe and a second sub-pipe, the first flow guide part is arranged in the first sub-pipe, the length direction of the first flow guide part is consistent with the airflow direction in the first sub-pipe, the second flow guide part is arranged in the second sub-pipe, the length direction of the second flow guide part is consistent with the airflow direction in the second sub-pipe, and therefore the first flow guide plate 13 and the second flow guide plate 13 can play a role in guiding the inflow airflow to flow forwards and turn to the airflow direction, and the transition part is in a smooth transition shape, so that the phenomenon that the airflow changes the flowing direction between the first flow guide part and the second flow guide part in an overlarge amplitude can be avoided, the purpose of enabling the airflow to turn is achieved, and the disturbance of a flow field is avoided.
Optionally, the number of the baffles 13 is multiple, and multiple baffles 13 are arranged side by side, so as to further improve the uniformity of the airflow.
The intake air flow measuring device in the present embodiment has the advantages of the intake air flow nozzle assembly in the first embodiment, and the advantages of the intake air flow nozzle assembly disclosed in the first embodiment will not be described again.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention. Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
Claims (10)
1. An air inlet flow nozzle assembly is characterized by comprising a plurality of nozzle flow meters and a connecting seat with a plurality of connecting through holes arranged in an array, wherein the nozzle flow meters are arranged in the connecting through holes in a one-to-one correspondence manner;
a predetermined number of the plurality of nozzle flow meters can be simultaneously activated to bring an upper measurement limit of the intake flow nozzle assembly to a predetermined intake flow.
2. The intake flow nozzle assembly of claim 1, wherein a plurality of the connecting through-holes are arranged in a matrix array.
3. The intake flow nozzle assembly as claimed in claim 2, wherein a plurality of the connecting through holes are arranged in a multi-layer surrounding array.
4. The intake flow nozzle assembly of claim 1, further comprising a stop plate, the nozzle flow meter being removably disposed within the connection through bore, the stop plate being removably plugged into the connection through bore.
5. The intake flow nozzle assembly of claim 1, further comprising a plugging assembly including a sealing cap, a blind plugging plate, and a flow orifice plate, wherein the nozzle flow meter is provided with a socket between the connection base and an outlet of the nozzle flow meter, wherein the sealing cap is removably capped at an inlet of the nozzle flow meter, and wherein the blind plugging plate and the flow orifice plate are removably disposed within the socket.
6. An intake flow measuring apparatus, comprising an intake pipe, a connecting pipe, and the intake flow nozzle assembly as claimed in any one of claims 1 to 5;
the connecting seat of the air inlet flow nozzle assembly is connected between the outlet of the air inlet pipe and the inlet of the connecting pipe, the inlet of the nozzle flow meter of the air inlet flow nozzle assembly is communicated with the outlet of the air inlet pipe, the outlet of the nozzle flow meter is detachably communicated with the inlet of the connecting pipe, and the outlet of the connecting pipe is used for being communicated with an air inlet chamber of a device to be tested.
7. The intake flow measuring apparatus of claim 6, wherein the connecting seat includes a first connecting seat and a second connecting seat, and the connecting through-hole passes through the first connecting seat and the second connecting seat;
the intake air flow measuring device also comprises a diffuser pipe and a rectifying chamber; the rectifying chamber is connected between the outlet of the air inlet pipe and the first connecting seat, the inlet of the nozzle flow meter penetrates through the first connecting seat and extends into the rectifying chamber, and a silencer and a filtering device which are sequentially arranged along the airflow direction are arranged in the rectifying chamber;
the diffuser pipe is connected between the second connecting seat and the inlet of the connecting pipe, the outlet of the nozzle flowmeter penetrates through the second connecting seat and extends into the diffuser pipe, and the diffuser pipe extends for a first preset distance along the airflow flow in a diameter expansion shape.
8. The intake flow measuring device of claim 7, wherein the tube wall of the rectification chamber is further provided with a first access door between the muffler and the filter device and a second access door between the filter device and the first connection block;
and a third access door is arranged on the pipe wall of the diffuser pipe and is positioned at the inlet of the diffuser pipe.
9. The intake air flow measuring device of claim 7, further comprising a plenum and a reducer connected in series between the diffuser pipe and the connecting pipe in the direction of flow of the air;
the pressure stabilizing chamber is in a constant diameter shape and extends for a second preset distance along the airflow direction, the reducer pipe is in a reducing shape and extends for a third preset distance along the airflow direction, and the second preset distance and the third preset distance are smaller than the first preset distance.
10. The intake air flow measuring device of claim 9, further comprising a diversion pipe communicating between the reducer pipe and the connecting pipe, wherein the diversion pipe comprises a plurality of sub-pipes connected in sequence along the airflow direction, and an included angle is formed between the length directions of two adjacent sub-pipes;
the flow guide plate is arranged at the joint of the two sub-pipes in the steering pipe and comprises a first flow guide part, a second flow guide part and a transition part which are sequentially connected along the flow direction of air flow, the length direction of the first flow guide part and the length direction of the second flow guide part form an included angle, and the transition part is in a smooth transition shape.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115784154A (en) * | 2022-10-26 | 2023-03-14 | 宁波中科远东催化工程技术有限公司 | Burner of natural gas reformer |
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| CN115784154A (en) * | 2022-10-26 | 2023-03-14 | 宁波中科远东催化工程技术有限公司 | Burner of natural gas reformer |
| CN115784154B (en) * | 2022-10-26 | 2024-03-29 | 宁波中科远东催化工程技术有限公司 | Burner of natural gas reformer |
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