CN208872360U - A kind of Venturi nozzle - Google Patents
A kind of Venturi nozzle Download PDFInfo
- Publication number
- CN208872360U CN208872360U CN201821512335.1U CN201821512335U CN208872360U CN 208872360 U CN208872360 U CN 208872360U CN 201821512335 U CN201821512335 U CN 201821512335U CN 208872360 U CN208872360 U CN 208872360U
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- outer cylindrical
- cylindrical portion
- nozzle
- pressure pipe
- canister portion
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Abstract
The utility model discloses a kind of Venturi nozzle, the rate-of flow detection technique field being related in pipeline is easily leaked since in existing Venturi nozzle, although being capable of measuring for having is accurate, solder joint is more；Some is not easy to leak, but measures inaccurate.This programme includes tube body, tube body includes outer cylindrical portion, nozzle canister portion, nozzle canister portion periphery wall is adjacent on outer cylindrical portion internal perisporium, tube body is divided into entrance, contraction section, throat, diffuser, outlet section along liquid flow direction, and contraction section, throat, diffuser are respectively positioned on the inside of nozzle canister portion；It is provided with grading ring slot on nozzle canister portion periphery wall, and the internal perisporium of outer cylindrical portion closes the notch of grading ring slot, several pressure ports are provided in nozzle canister portion, a negative pressure pipe and a positive pressure pipe are fixedly connected on outer cylindrical portion peripheral wall.This programme is provided only with two solder joints, then leakage probability can be reduced, and be equipped with grading ring slot and multiple pressure ports, to improve measurement accuracy.
Description
Technical field
The utility model relates to the rate-of flow detection technique fields in pipeline, and in particular to a kind of Venturi nozzle.
Background technique
Venturi nozzle is mainly used to measure the flow of liquid in pipeline, with reference to Fig. 1, the Venturi nozzle master of existing national standard
It to be provided with the grading ring 18 of toroidal cavity including Venturi nozzle tube body 1, inside, positive pressure pipe 16, negative pressure pipe 17, connect
Pipe 19 (referring to GB/T2624.3-2006), and along the flow direction of medium in Venturi nozzle tube body 1, it successively include entrance
Section 11, contraction section 12, throat 13, diffuser 14, outlet section 15.Positive pressure pipe 16 is connected to inlet port section 11, and negative pressure pipe 17 is around text
Nozzle body 1 is equipped at least four (national regulations, at least four) in mound, and 17 one end of negative pressure pipe is connected into throat 13, the other end
It is connected into grading ring 18, connects 19 one end of pipe and be connected into grading ring 18.The liquid of entrance 11 can be then measured by positive pressure pipe 16
Pressure measures the pressure of throat 13 by connecting pipe 19, and by substituting into the difference of two pressure
In, the intracorporal flow of pipe is calculated.Wherein, qv、c、ε、β、d、ρ1Respectively flow (m3/ h), efflux coefficient, inflatable system
Number (water 1), 13 diameter of throat and 11 diameter ratio of entrance, 13 diameter of throat, the density of liquid in operational conditions.
It is negative due to being connected between grading ring and Venturi nozzle tube body in place of above-mentioned this kind of Venturi nozzle Shortcomings
Pressure pipe, then tie point is required to be fixed by way of welding everywhere, i.e., positive pressure pipe, negative pressure pipe, connect pipe with
The connection welding of each component will at least have at ten.Then during transportation, it may be split due to vibration etc. at solder joint
Also easily there is crack (such as in cryogenic air separation unit and in the process of running under the cold and hot variation of certain media, at solder joint in seam
Field, for the temperature of liquid at -160 DEG C to -180 DEG C, range of temperature is big, and under the impact expanded with heat and contract with cold, solder joint is easily split
Seam；When for another example the device is used in the ice chest of large-scale oxygen generating plant, the temperature change of liquid equally easily leads to solder joint and goes out
Existing crack).
And once there is crack in solder joint, then liquid releases the accuracy for not only affecting flow detection, even more serious
Normal operation inside the equipment such as the ice chest that has been the low temperature liquid strong influence released, and if it find that not in time, it is likely that
Lead to the equipment scrappings such as entire ice chest.And the maintenance process in later period is cumbersome, and shutdown maintenance is even more to leverage entirely
The running of engineering is lost inestimable.
So also someone in order to reduce leads to the probability of equipment damage since liquid releases, reduce the quantity of solder joint,
That is, being not provided with grading ring, and negative pressure pipe also only sets one, pressure inspection is directly carried out to throat by this root negative pressure pipe
It surveys.If Authorization Notice No. be CN202869560U a kind of monoblock type Venturi nozzle, which includes tube body, in tube body according to
Secondary to set fluid inlet section, contraction section, cylindrical throat, diffuser and fluid outlet section, tube body is on the tube wall of fluid inlet section
Equipped with positive pressure pipe, tube body is equipped with negative pressure pipe on the tube wall of cylindrical throat；Positive pressure pipe and negative pressure pipe pass through setting
Through-hole on tube wall is connected to tubular body, and positive pressure pipe and negative pressure pipe are welded on the outer wall of tube body at the position of through-hole
On.
This setting form in documents, although can reduce Venturi nozzle the probability leaked occurs, it is pressed
Strong detection accuracy is greatly reduced.Because liquid is during proceeding to throat from entrance, caliber changes, then liquid
It will appear turbulent flow, liquid caused often to differ larger along the pressure values of throat's circumferential direction each point, then detected in single negative pressure pipe
Pressure values tend not to represent the true pressure values of throat；And wave also can constantly occur for the pressure values in single negative pressure pipe
It is dynamic, cause to be difficult accurately and rapidly to know the true pressure values of throat.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of Venturi nozzle, this programme
Two solder joints are provided only with, then leakage probability can be reduced, and be equipped with grading ring slot and multiple pressure ports, to improve measurement accuracy.
To achieve the above object, the utility model provides following technical solution: a kind of Venturi nozzle, including tube body,
The tube body includes outer cylindrical portion, the nozzle canister portion being installed on inside outer cylindrical portion, and nozzle canister portion periphery wall is adjacent in outer cylindrical portion inner circumferential
On wall, tube body is divided into entrance, contraction section, throat, diffuser, outlet section, and contraction section, larynx along liquid flow direction
Portion, diffuser are respectively positioned on the inside of nozzle canister portion；Grading ring slot, and the internal perisporium envelope of outer cylindrical portion are provided on nozzle canister portion periphery wall
Close the notch of grading ring slot, nozzle canister portion circumferential be equidistantly equipped with several and be used to be connected to taking for throat and grading ring slot around it
Hole is pressed, a negative pressure pipe is fixedly connected on outer cylindrical portion peripheral wall, negative pressure pipe one end is connected to grading ring slot and the other end connects
The outside of outer cylindrical portion is passed through, a positive pressure pipe is fixedly connected on outer cylindrical portion peripheral wall, positive pressure pipe one end is connected to entrance
The interior and other end is connected to the outside of outer cylindrical portion.
By using above-mentioned technical proposal, can reduce leads to the probability leaked because pad in the prior art, with
And improve the detection accuracy of flow.
It is directed at first point: due to being only welded with two root canals, i.e. a positive pressure pipe and a negative pressure in outer cylindrical portion
Pipe, then can be reduced to two solder joints from ten original solder joints, to substantially reduce the probability that the intracorporal liquid of pipe leaks.
It is directed to second point: circumferential etc. due to offering grading ring slot in the periphery of nozzle canister portion, and around nozzle canister portion
Spacing is equipped with multiple pressure ports, then grading ring slot can capture the liquid pressure of the circumferential equidistant multiple points of throat, and press
It carries out pressure in annular groove to handle, the liquid pressure for enabling each point to capture is mutually balanced in grading ring slot, to make to pass through
The pressure values that negative pressure pipe measures can be more close to the actual liquid pressure values of throat, and the pressure values that detected are more steady
It is fixed, it is not in the case where fluctuating widely repeatedly.
Simultaneously as the number of openings of pressure port is not associated with the quantity of solder joint, then no matter between equal in nozzle canister portion
Away from how many a pressure ports are opened up, the quantity of total pad maintains two always, then can be while reducing leakage probability, can
To improve the pressure detection accuracy of negative pressure pipe as far as possible.
The utility model is further arranged to: abutment ring, and nozzle canister portion are fixed on the internal perisporium of the outer cylindrical portion
It is connected to and is abutted on ring-side wall far from entrance one end；Abutment ring is welded on the internal perisporium of outer cylindrical portion, or in processing outer cylinder
When the internal perisporium in portion, the part internal perisporium of outer cylindrical portion is fallen by vehicle, to leave a circle abutment ring.
By using above-mentioned technical proposal, when nozzle canister portion to be installed into outer cylindrical portion, the end of nozzle canister portion can be made
It abuts to ring-side wall is abutted, so that positioning action is played during installation, so that negative pressure pipe can be connected to grading ring slot.Moreover,
In the process of running, with the continuous impact of liquid, nozzle canister portion has the tendency that deviating along the liquid direction of motion, but is supporting
It connects under the support of ring, can prevent nozzle canister portion from deviating along the liquid direction of motion, to guarantee that negative pressure pipe can be with grading ring slot
Connection, reduces the probability of dislocation.
The utility model is further arranged to: the grading ring slot is more than or equal to all along tube body radial slot sectional area
The sum of pressure port orifice area.
By using above-mentioned technical proposal, biggish grading ring slot space can be such that the pressure in grading ring slot does not fluctuate too
Obviously, thus can be more stable by the pressure that negative pressure pipe detects, it is unlikely to recurrent fluctuations.
The utility model is further arranged to: it successively includes thin segment that the outer cylindrical portion is axial along tube body, thick section, thin
Wall section, and positive pressure pipe and negative pressure pipe are connected on thick section.
By using above-mentioned technical proposal, due to being equipped with thick section, and positive pressure pipe and negative pressure pipe are connected to thick section
On, then when positive pressure pipe and negative pressure pipe are by axially or radially impacting, thick section can reduce outer cylindrical portion and come into the picture and cause
The probability of damage.
The utility model is further arranged to: positive connecting hole and negative connecting hole, positive connecting hole are provided on the thick section
Connect the outside of entrance and outer cylindrical portion, the outside of negative connecting hole connection grading ring slot and outer cylindrical portion；Positive connecting hole is far from outer cylinder
The flaring of portion, one end, central axes has positive installing port, and positive pressure pipe end is fixedly mounted in positive installing port；Negative connecting hole is far from outer
The flaring of canister portion central axes one end has negative installing port, and negative pressure pipe end is fixedly mounted in negative installing port.
It is convenient that positive pressure pipe and negative pressure pipe are positioned before welding by using above-mentioned technical proposal, thus
Improve the accuracy of welding.
The utility model is further arranged to: the pressure port is around nozzle canister portion circumferential direction spaced set, and quantity is
Six.
By using above-mentioned technical proposal, regulation is at least four pressure ports in national standard, and six purposes are arranged herein
It is enhancing detection accuracy, it is of course also possible to open up more than six.
The utility model is further arranged to: the contraction section is along the section of nozzle canister portion axial direction by a quarter Duan Yuan
Segmental arc composition.
By using above-mentioned technical proposal, due in existing national standard technique (referring to GB/T2624.3-2006), contraction section
Usually by both ends circular arc contour group at, and close to entrance more another section of circular arc of circular arc radius it is bigger.Two sections of circular arcs are set
Purpose be first to improve the gradient along liquid direction of motion contraction section, then reduce the gradient along liquid direction of motion contraction section, from
And when making liquid by contraction section, at the beginning since internal diameter is sharply shunk, then velocity variable is larger, then gradually with the gradient
It is slow, velocity variable also gradually become smaller (wherein it is worth noting that, compared to one section circular arc of two sections of circular arcs, the gradient of journey thereafter
The amount of slowing down is bigger, i.e., under the premise of identical total internal diameter shrinkage, the rear journey velocity variable under two sections of circular arc settings is smaller), then
The turbulence level of throat's liquid is reduced, measurement accuracy is improved.
Two sections of circular arcs are but set and apply in general to the liquid of big flow, and are directed to the flow detection of small flow liquid
When, general quarter circular arc, which is just enough to realize, accurately to be had detected.So here for difficulty of processing, selection only setting one is reduced
A quadrant segmental arc.
And the change of contraction section, will lead to efflux coefficient c is different from state's scale value, through experiment it is found that contraction section uses four
After/mono- arc section, efflux coefficient c substantially 0.7.
And contraction section is using another advantage of quadrant segmental arc: the Venturi nozzle being made to be more suitable for little Lei
The liquid flow detection of promise number.
The utility model has the advantage that
1, this programme is provided only with two solder joints, and can reduce leads to the probability leaked because pad in the prior art,
And it is equipped with grading ring slot and multiple pressure ports, to improve measurement accuracy；
2, this programme is not associated with due to the number of openings of pressure port with the quantity of solder joint, then regardless of in nozzle canister portion etc.
Spacing opens up how many a pressure ports, and the quantity of total pad maintains two always, then can while reducing leakage probability,
The pressure detection accuracy of negative pressure pipe can be improved as far as possible；
3, in the present solution, biggish grading ring slot space can be such that the pressure in grading ring slot does not fluctuate too obviously, thus
Can be more stable by the pressure that negative pressure pipe detects, it is unlikely to recurrent fluctuations.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the Venturi nozzle in existing national standard；
Fig. 2 is the structural schematic diagram of the present embodiment one；
Fig. 3 is the structural schematic diagram of the present embodiment two.
Appended drawing reference: 1, Venturi nozzle tube body；11, entrance；12, contraction section；13, throat；14, diffuser；15,
Outlet section；16, positive pressure pipe；17, negative pressure pipe；18, grading ring；19, connecting pipe, (label before the label is attached drawing 1
In label)；2, tube body；21, outer cylindrical portion；211, thick section；212, thin segment；22, nozzle canister portion；23, entrance；24, it receives
Contracting section；25, throat；26, diffuser；27, outlet section；28, abutment ring；3, grading ring slot；31, pressure port；4, positive connecting hole
41, positive installing port；42, positive pressure pipe；5, negative connecting hole；51, negative installing port；52, negative pressure pipe.
Specific embodiment
Clear, complete description is carried out to the technical solution of the utility model below with reference to attached drawing, it is clear that described
Embodiment is only a part of the embodiment of the utility model, instead of all the embodiments.Implementation based on the utility model
Example, those of ordinary skill in the art's obtained all other embodiment without making creative work, all belongs to
In the range that the utility model is protected.
The utility model is described further referring to attached drawing.
Embodiment one: a kind of Venturi nozzle, with reference to Fig. 2, including tube body 2, tube body 2 includes outer cylindrical portion 21, is installed on outside
Nozzle canister portion 22 inside canister portion 21, outer cylindrical portion 21 and nozzle canister portion 22 are coaxially set, 22 periphery wall interference of nozzle canister portion patch
Tightly on 21 internal perisporium of outer cylindrical portion.Tube body 2 is divided into entrance 23, contraction section 24, throat 25, diffusion along liquid flow direction
Section 26, outlet section 27, and contraction section 24, throat 25, diffuser 26 are respectively positioned on the inside of nozzle canister portion 22, entrance 23 and outlet
Section 27 is located at the axial ends of nozzle canister portion 22.
The internal diameter of entrance 23 is the internal diameter of outer cylindrical portion 21, and contraction section 24 is along the axial section of nozzle canister portion 22 by four points
One of section arc section composition, throat 25 be entire nozzle canister portion 22 in internal diameter it is one section the smallest, diffuser 26 is along liquid flowing side
To internal diameter become larger, the internal diameter of outlet section 27 is the internal diameter of outer cylindrical portion 21.
Grading ring slot 3 is provided on 22 periphery wall of nozzle canister portion, the internal perisporium of outer cylindrical portion 21 closes the slot of grading ring slot 3
Mouthful, nozzle canister portion 22 circumferentially equidistantly sets that there are six for being connected to the pressure port 31 of throat 25 Yu grading ring slot 3 around it.Press
Annular groove 3 is more than or equal to the sum of all 31 orifice areas of pressure port along 2 radial slot sectional area of tube body, that is, with nozzle canister portion 22
The plane that central axes are overlapped cuts nozzle canister portion 22, and under the state, the cross section area of grading ring slot 3 is greater than all pressure ports 31 and leans on
The sum of the area in aperture of nearly 22 central axes of nozzle canister portion, and the cross section area of grading ring slot 3 can be in all 31 apertures of pressure port
Twice or more of the sum of area.
A positive connecting hole 4 and a negative connecting hole 5 are provided on 21 peripheral wall of outer cylindrical portion, positive connecting hole 4 is connected to entrance 23
With the outside of outer cylindrical portion 21, negative connecting hole 5 is connected to the outside of grading ring slot 3 and outer cylindrical portion 21.Positive connecting hole 4 is far from outer cylindrical portion 21
The flaring of central axes one end has positive installing port 41, and positive installing port 41 is embedded with a positive pressure pipe 42, positive pressure pipe 42 and outer cylinder
It welds in portion 21.Negative connecting hole 5 has negative installing port 51 far from the flaring of 21 central axes one end of outer cylindrical portion, and negative installing port 51 is embedded with one
Root negative pressure pipe 52, negative pressure pipe 52 and outer cylindrical portion 21 are welded.
Be fixed with abutment ring 28 on the internal perisporium of outer cylindrical portion 21, and nozzle canister portion 22 far from 23 one end of entrance be connected to
It connects on 28 side wall of ring.Then under the flowing of liquid, impact, nozzle canister portion 22 remain to it is stable be located in outer cylindrical portion 21, without
It shifts along nozzle canister portion 22 is axial, then reduces the probability that negative connecting hole 5 is staggered with grading ring slot 3.
Abutment ring 28 can be welded on the internal perisporium of outer cylindrical portion 21, can also be in the internal perisporium of processing outer cylindrical portion 21
When, fall the part internal perisporium of outer cylindrical portion 21, by vehicle to leave a circle abutment ring 28.
It successively includes thin segment 212, thick section 211, thin segment 212 that outer cylindrical portion 21 is axial along tube body 2, and positive pressure pipe 42
It is connected on thick section 211 with negative pressure pipe 52.
Principle is embodied: liquid flows successively through entrance 23, contraction section 24, throat 25, diffuser 26, outlet section 27,
The liquid pressure in entrance 23 can be detected by positive pressure pipe 42；And the liquid in throat 25 can by pressure port 31 into
To grading ring slot 3, then the liquid pressure in grading ring slot 3 can be detected by negative pressure pipe 52, and the stream in grading ring slot 3
Matter pressure is equal to the liquid pressure of throat 25.Then the difference Δ P of two pressure can be substituted into
In, the intracorporal flow of pipe is calculated.Wherein, qv、c、ε、β、d、ρ1Respectively flow (m3/ h), efflux coefficient, inflatable coefficient
(water 1), 25 diameter of throat and 23 diameter ratio of entrance, 25 diameter of throat, the density of liquid in operational conditions.
It is worth noting that this programme, which can reduce, leads to the probability leaked because pad in the prior art, and
Improve the detection accuracy of flow.
Be directed at first point: due to being only welded with two root canals in outer cylindrical portion 21, i.e. a positive pressure pipe 42 and one bear
Pressure pipe 52 can then be reduced from ten original solder joints to two solder joints, thus substantially reduce the liquid in tube body 2 leak it is general
Rate.
It is directed to second point: due to offering grading ring slot 3 in the periphery of nozzle canister portion 22, and around nozzle canister portion 22 weeks
To equidistantly setting there are six pressure port 31, then grading ring slot 3 can capture the liquid pressure of circumferential equidistant six points of throat 25,
And pressure processing is carried out in grading ring slot 3, the liquid pressure for enabling each point to capture is mutually balanced in grading ring slot 3,
To enable the pressure values measured by negative pressure pipe 52 more close to the actual liquid pressure values of throat 25, and detected
Pressure values are more stable, are not in the case where fluctuating widely repeatedly.
Simultaneously as the number of openings of pressure port 31 is not associated with the quantity of solder joint, then regardless of in nozzle canister portion 22
How many a pressure ports 31 are equidistantly opened up, the quantity of total pad maintains two always, then can reduce leakage probability
Meanwhile the pressure detection accuracy of negative pressure pipe 52 can be improved as far as possible.
Embodiment two: referring to Fig. 3, only difference is that, nozzle canister portion 22 is consolidated in the form of welding with embodiment one
Be scheduled on the inside of outer cylindrical portion 21, and need so that 22 periphery wall of nozzle canister portion is adjacent on 21 internal perisporium of outer cylindrical portion, with guarantee into
Liquid in mouthful section 23 will not be by the slot leakage between nozzle canister portion 22 and outer cylindrical portion 21 into grading ring slot 3.
Specific implementation principle: it is the same as example 1.
The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should refer to
Out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and
Retouching, these improvements and modifications also should be regarded as the protection scope of the utility model.
Claims (7)
1. a kind of Venturi nozzle, including tube body (2), it is characterized in that: the tube body (2) includes outer cylindrical portion (21), is installed on outside
The internal nozzle canister portion (22) of canister portion (21), nozzle canister portion (22) periphery wall are adjacent on outer cylindrical portion (21) internal perisporium, tube body (2)
It is divided into entrance (23), contraction section (24), throat (25), diffuser (26), outlet section (27) along liquid flow direction, and
Contraction section (24), throat (25), diffuser (26) are respectively positioned on the inside of nozzle canister portion (22)；It is opened on nozzle canister portion (22) periphery wall
Have grading ring slot (3), and the internal perisporium of outer cylindrical portion (21) closes the notch of grading ring slot (3), nozzle canister portion (22) is around its week
It is used to be connected to the pressure ports (31) of throat (25) Yu grading ring slot (3) to several are equidistantly equipped with, on outer cylindrical portion (21) peripheral wall
It is fixedly connected with a negative pressure pipe (52), negative pressure pipe (52) one end is connected to grading ring slot (3) and the other end is connected to outside
The outside of canister portion (21), a positive pressure pipe (42) is fixedly connected on outer cylindrical portion (21) peripheral wall, and positive pressure pipe (42) one end connects
It passes through in entrance (23) and the other end is connected to the outside of outer cylindrical portion (21).
2. a kind of Venturi nozzle according to claim 1, it is characterized in that: fixed on the internal perisporium of the outer cylindrical portion (21)
Have abutment ring (28), and nozzle canister portion (22) is connected on abutment ring (28) side wall far from entrance (23) one end；Abutment ring
(28) it is welded on the internal perisporium of outer cylindrical portion (21), or when processing the internal perisporium of outer cylindrical portion (21), outer cylindrical portion is fallen by vehicle
(21) part internal perisporium, to leave a circle abutment ring (28).
3. a kind of Venturi nozzle according to claim 1, it is characterized in that: the grading ring slot (3) is radial along tube body (2)
Slot cross-section product be more than or equal to the sum of all pressure ports (31) orifice area.
4. a kind of Venturi nozzle according to claim 1, it is characterized in that: the outer cylindrical portion (21) is axial along tube body (2)
It successively include thin segment (212), thick section (211), thin segment (212), and positive pressure pipe (42) and negative pressure pipe (52) connect
On thick section (211).
5. a kind of Venturi nozzle according to claim 4, it is characterized in that: being provided with positive connection on the thick section (211)
Hole (4) and negative connecting hole (5), the outside of positive connecting hole (4) connection entrance (23) and outer cylindrical portion (21), negative connecting hole (5) is even
The outside of logical grading ring slot (3) and outer cylindrical portion (21)；Positive connecting hole (4) has Zhengan County far from the flaring of outer cylindrical portion (21) central axes one end
It fills mouth (41), and positive pressure pipe (42) end is fixedly mounted in positive installing port (41)；Negative connecting hole (5) is far from outer cylindrical portion (21)
The flaring of central axes one end has negative installing port (51), and negative pressure pipe (52) end is fixedly mounted in negative installing port (51).
6. a kind of Venturi nozzle according to claim 1, it is characterized in that: the pressure port (31) is around nozzle canister portion (22)
Circumferential spaced set, and quantity is six.
7. a kind of Venturi nozzle according to claim 1, it is characterized in that: the contraction section (24) is along nozzle canister portion (22)
Axial section is made of a quarter section arc section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821512335.1U CN208872360U (en) | 2018-09-14 | 2018-09-14 | A kind of Venturi nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821512335.1U CN208872360U (en) | 2018-09-14 | 2018-09-14 | A kind of Venturi nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208872360U true CN208872360U (en) | 2019-05-17 |
Family
ID=66467696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821512335.1U Active CN208872360U (en) | 2018-09-14 | 2018-09-14 | A kind of Venturi nozzle |
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| Country | Link |
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| CN (1) | CN208872360U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114734369A (en) * | 2022-06-13 | 2022-07-12 | 中国航发上海商用航空发动机制造有限责任公司 | Pressurizing container, pressurizing device, finishing device and pressurizing method of hydraulic oil |
-
2018
- 2018-09-14 CN CN201821512335.1U patent/CN208872360U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114734369A (en) * | 2022-06-13 | 2022-07-12 | 中国航发上海商用航空发动机制造有限责任公司 | Pressurizing container, pressurizing device, finishing device and pressurizing method of hydraulic oil |
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