CN217716509U - Synthetic gas venturi flowmeter for synthetic ammonia device adopting double-circular-arc contraction - Google Patents
Synthetic gas venturi flowmeter for synthetic ammonia device adopting double-circular-arc contraction Download PDFInfo
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- CN217716509U CN217716509U CN202221088170.6U CN202221088170U CN217716509U CN 217716509 U CN217716509 U CN 217716509U CN 202221088170 U CN202221088170 U CN 202221088170U CN 217716509 U CN217716509 U CN 217716509U
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Abstract
The utility model discloses an adopt synthetic ammonia synthesis gas venturi flowmeter for device of biarc shrink, be in including the venturi nozzle with dock respectively left flange and the right flange at both ends about the venturi nozzle, the jet orifice of venturi nozzle includes the big cylinder hole of the entrance that connects gradually from a left side to the right side, the biarc hole of contraction section, the small circle post hole of bottleneck section and the circular cone hole of diffuser the venturi nozzle excircle respectively be provided with first induced pressure hole and the second induced pressure hole that the jet orifice of venturi nozzle is linked together, first induced pressure hole site in big cylinder hole with the position that biarc hole is adjacent, the second induced pressure hole site in the middle part position of small circle post hole. The utility model discloses realize the installation of venturi flowmeter in the limited length space to improve flow measurement's precision and stability, and manufacturing cost is lower.
Description
Technical Field
The utility model relates to a flow detection technical field, concretely relates to synthetic gas venturi flowmeter for ammonia plant that adopts the shrink of bi-arc.
Background
The venturi tube flowmeter is widely applied in the field of fluid measurement. A conventional venturi tube flowmeter in the prior art includes an inlet cylindrical section, a conical contraction section, a closing-in cylindrical section, and a conical expansion section that are integrally connected in sequence according to the direction of fluid flow. Fluid enters from the inlet end, is contracted by the conical contraction section, and flows out from the conical diffusion section after passing through the closed cylindrical section with the smallest caliber. A pair of pressure taking ports are respectively arranged on an inlet cylindrical section and a closing cylindrical section of the Venturi tube, a fluid pressure detection sensor (differential pressure transmitter) is arranged on each pressure taking port, the pressure difference of the pair of pressure taking ports can be measured, and then the flow value of the fluid is obtained through conversion according to the pressure difference.
The technical improvement project of a certain synthetic ammonia device needs to use a venturi flowmeter to detect the flow rate of synthetic gas, but because the reserved space size for connecting into the venturi flowmeter is limited, if the venturi flowmeter with a conventional structure is adopted, the total length of the whole venturi pipe is longer due to the longer lengths of the cone contraction section and the cone diffusion section, the total length of the whole venturi pipe is longer, and the whole venturi pipe cannot be installed in a limited length space. If the method for shortening the lengths of the conical contraction section and the conical diffusion section is adopted, the air flow can be suddenly contracted and suddenly diffused, and therefore the stable measurement and the high-precision measurement of the flow are not facilitated.
Therefore, it is necessary to improve the existing venturi tube flowmeter structure to improve the accuracy and stability of flow measurement.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides an adopt synthetic gas venturi flowmeter for ammonia device of biarc shrink aims at realizing the installation of venturi flowmeter in the limited length space to improve flow measurement's precision and stability. The specific technical scheme is as follows:
the utility model provides an adopt synthetic gas venturi flowmeter for ammonia device of biarc shrink, includes the venturi nozzle and dock respectively left flange and right flange at both ends about the venturi nozzle, the jet orifice of venturi nozzle includes from the big cylinder hole of the entrance that connects gradually from a left side to the right side, the biarc hole of contraction section, the small circle post hole of bottleneck section and the circular cone hole of diffuser the venturi nozzle excircle on be provided with respectively with first pressure inducing hole and the second pressure inducing hole that the jet orifice of venturi nozzle is linked together, first pressure inducing hole site in big cylinder hole with the position that biarc hole is adjacent, the second pressure inducing hole site in the middle part position of small circle post hole.
The utility model discloses in, the biarc hole is including controlling first circular arc hole and the second circular arc hole of adjacent connection, first circular arc hole is surrounded by one section first circular arc generating line the central axis of venturi nozzle gyration a week and form, the second circular arc hole is surrounded by one section second circular arc generating line the central axis of venturi nozzle gyration a week and form, just first circular arc generating line with second circular arc generating line forms the tangential connection in adjacent junction, second circular arc generating line with the side generating line of small circle post hole forms the tangential connection in adjacent junction.
The utility model discloses in, be provided with respectively on the excircle of venturi nozzle with first pressure hole connected first draw presses the pipe, with the second pressure hole connected second draws presses the pipe.
Preferably, left side flange and right flange are the neck flange, left side flange's neck terminal surface with the left side drill way terminal surface of venturi nozzle docks each other, right side flange's neck terminal surface with the right side drill way terminal surface of venturi nozzle docks each other.
As a further improvement the right-hand member of venturi nozzle sprays delivery outlet position and still is provided with one section and sprays delivery outlet truncation tail structure, it is in for setting up to spray delivery outlet truncation tail structure the tang in one section of the drill way terminal surface of the circular cone hole of venturi nozzle, the diameter of interior tang is greater than the drill way diameter of circular cone hole, right side flange's neck terminal surface with the terminal surface of interior tang docks each other.
Preferably, the workblanks of the left connecting flange, the right connecting flange, the Venturi nozzle, the first pressure leading pipe and the second pressure leading pipe are all III-grade forgings made of 15 CrMo.
Preferably, the left connecting flange, the right connecting flange, the first pressure guiding pipe and the second pressure guiding pipe are respectively connected with the venturi nozzle in a welding mode.
Preferably, the conical angle of the conical inner hole of the upper diffusion section of the venturi nozzle is 30 degrees.
The utility model discloses in the flange terminal surface of left side flange and right flange is provided with protruding tang respectively, be provided with trapezoidal cross-section's ring channel on the terminal surface of protruding tang, just the notch width size of ring channel is greater than the tank bottom width size of ring channel.
The utility model discloses in, the bolted connection hole of a plurality of quantity has been arranged along circumference interval respectively on left side flange and the right flange.
The beneficial effects of the utility model are that:
first, the utility model discloses an adopt synthetic ammonia synthesis gas venturi flowmeter for device of biarc shrink, the contraction section hole of venturi nozzle adopts the biarc hole, can shorten the length of contraction section on the one hand, make the total length of venturi nozzle shorten, thereby realize the installation of the venturi nozzle in the finite length space, on the other hand is owing to set up the tangential connection structure between the biarc in the biarc hole and the tangential connection structure between biarc hole and the small circle post hole, thereby can avoid the air current at the abrupt shrink of venturi nozzle contraction section, make the flow of air current comparatively steady and the resistance little. Therefore, the installation of the Venturi flowmeter in the space with the limited length is realized, and the accuracy and the stability of flow measurement are improved.
Second, the utility model discloses an adopt synthetic ammonia venturi flowmeter for device of biarc shrink, the circular cone hole of venturi nozzle's diffuser adopts the truncation project organization, because the built-in mouth size of truncation design is big, consequently can not increase loss of pressure and influence measuring precision and stability, and this kind of truncation project organization can further shorten venturi nozzle's total length to be fit for the installation of interior venturi flowmeter in limited length space more.
Third, the utility model discloses an adopt synthetic gas venturi flowmeter for ammonia device of biarc shrink, the shortening of venturi nozzle total length also is favorable to reducing the material quantity to reduce manufacturing cost.
Fourth, the utility model discloses an adopt synthetic ammonia synthesis gas venturi flowmeter for device of biarc shrink, the venturi nozzle adopts forging combination welded structure, has further made things convenient for the manufacturing and has reduced manufacturing cost.
Drawings
Fig. 1 is a schematic structural diagram of a syngas venturi flowmeter for a synthetic ammonia plant using bi-arc contraction of the present invention.
In the figure: 1. the Venturi nozzle comprises a Venturi nozzle body, 2, a left connecting flange body, 3, a right connecting flange body, 4, a large cylindrical inner hole, 5, a double-arc inner hole, 6, a small cylindrical inner hole, 7, a conical inner hole, 8, a first pressure leading hole, 9, a second pressure leading hole, 10, a first arc inner hole, 11, a second arc inner hole, 12, a first arc bus, 13, a second arc bus, 14, a tangential connection, 15, a first pressure leading pipe, 16, a second pressure leading pipe, 17, a neck, 18, an inner spigot, 19, a welding connection, 20, a convex spigot, 21, an annular groove, 22 and a bolt connecting hole.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 is the utility model discloses an adopt synthetic gas venturi flowmeter's for ammonia device embodiment of bi-circular arc shrink, include venturi nozzle 1 and dock respectively left flange 2 and right flange 3 at both ends about venturi nozzle 1, venturi nozzle 1's jet orifice includes the big cylinder hole 4 of the entrance that connects gradually from a left side to the right side, the bi-circular arc hole 5 of shrink section, the small circle post hole 6 of bottleneck section and the circular cone hole 7 of diffuser section be provided with respectively on venturi nozzle 1 excircle with first induced pressure hole 8 and the second induced pressure hole 9 that venturi nozzle 1's jet orifice is linked together, first induced pressure hole 8 is located big cylinder hole 4 with the position that bi-circular arc hole 5 is adjacent, second induced pressure hole 9 is located the middle part position of small circle post hole 6.
In this embodiment, the double-arc inner hole 5 includes a first arc inner hole 10 and a second arc inner hole 11 which are connected adjacently left and right, the first arc inner hole 10 is surrounded by one section of first arc bus 12 and is formed by one circle of revolution of the central axis of the venturi nozzle 1, the second arc inner hole 11 is surrounded by one section of second arc bus 13 and is formed by one circle of revolution of the central axis of the venturi nozzle 1, the first arc bus 12 and the second arc bus 13 form a tangential connection 14 at an adjacent joint, the second arc bus 13 and a side bus of the small cylinder inner hole 6 form a tangential connection 14 at an adjacent joint.
In this embodiment, a first pressure guiding pipe 15 connected to the first pressure guiding hole 8 and a second pressure guiding pipe 16 connected to the second pressure guiding hole 9 are respectively disposed on an outer circle of the venturi nozzle 1.
Preferably, left side flange 2 and right flange 3 are the neck flange, the neck 17 terminal surface of left side flange 2 with the left side drill way terminal surface of venturi nozzle 1 docks each other, the neck 17 terminal surface of right side flange 3 with the right side drill way terminal surface of venturi nozzle 1 docks each other.
As the further improvement of this embodiment the right-hand member of venturi nozzle 1 sprays the delivery outlet position and still is provided with one section and sprays delivery outlet truncation tail structure, it is in to spray delivery outlet truncation tail structure for setting up tang 18 in one section of the downthehole mouth terminal surface of the circular cone of venturi nozzle 1 hole 7, the diameter of interior tang 18 is greater than the hole mouth diameter of circular cone hole 7, the neck 17 terminal surface of right side flange 3 with the mutual butt joint of the terminal surface of interior tang 18.
Preferably, the blanks of the left connecting flange 2, the right connecting flange 3, the venturi nozzle 1, the first pressure guiding pipe 15 and the second pressure guiding pipe 16 are III-grade forgings made of 15 CrMo.
Preferably, the left connecting flange 2, the right connecting flange 3, the first pressure guiding pipe 15 and the second pressure guiding pipe 16 are respectively connected with the venturi nozzle 1 in a welding manner.
Preferably, the conical angle of the conical inner hole 7 of the upper diverging section of the venturi nozzle 1 is 30 °.
In this embodiment, the flange end faces of the left connecting flange 2 and the right connecting flange 3 are respectively provided with a male end 20, the end face of the male end 20 is provided with an annular groove 21 with a trapezoidal section, and the width of the notch of the annular groove 21 is greater than the width of the groove bottom of the annular groove 21.
In this embodiment, a plurality of bolt connection holes 22 are circumferentially spaced on the left connection flange 2 and the right connection flange 3, respectively.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides an adopt synthetic gas venturi flowmeter for ammonia device of biarc shrink, a serial communication port, include the venturi nozzle and dock respectively left flange and right flange at both ends about the venturi nozzle, the jet orifice of venturi nozzle includes from a left side to the right side big cylinder hole of the entry that connects gradually, the biarc hole of shrink section, the little cylinder hole of bottleneck section and the circular cone hole of diffuser the venturi nozzle excircle respectively be provided with first induced pressure hole and the second induced pressure hole that the jet orifice of venturi nozzle is linked together, first induced pressure hole site in big cylinder hole with the position that biarc hole is adjacent, the second induced pressure hole site in the middle part position of little cylinder hole.
2. The synthesis gas venturi flowmeter for synthetic ammonia device that adopts bi-arc contraction according to claim 1, characterized in that, the bi-arc hole includes the first arc hole and the second arc hole that are adjacently connected from left to right, the first arc hole is formed by a section of first arc bus revolving around the central axis of the venturi nozzle for one circle, the second arc hole is formed by a section of second arc bus revolving around the central axis of the venturi nozzle for one circle, and the first arc bus and the second arc bus form tangential connection at the adjacent connection, the second arc bus and the side bus of the small cylinder hole form tangential connection at the adjacent connection.
3. The synthesis gas venturi flowmeter for the ammonia synthesis device adopting the bi-arc contraction as set forth in claim 1, wherein a first pressure guiding pipe connected to the first pressure guiding hole and a second pressure guiding pipe connected to the second pressure guiding hole are respectively provided on an outer circumference of the venturi nozzle.
4. The synthetic gas venturi flowmeter adopting the bi-arc contraction for the ammonia synthesis device according to claim 1, wherein the left connecting flange and the right connecting flange are both necked flanges, a neck end face of the left connecting flange is butted with a left side orifice end face of the venturi nozzle, and a neck end face of the right connecting flange is butted with a right side orifice end face of the venturi nozzle.
5. The synthetic gas venturi flowmeter adopting the bi-arc contraction for the ammonia synthesis device according to claim 4, wherein a section of jet output hole tail-cutting structure is further arranged at a jet output port position at the right end of the venturi nozzle, the jet output hole tail-cutting structure is a section of inner spigot arranged at the orifice end face of a conical inner hole of the venturi nozzle, the diameter of the inner spigot is larger than the orifice diameter of the conical inner hole, and the neck end face of the right connecting flange is butted with the end face of the inner spigot.
6. The synthesis gas venturi flowmeter for the ammonia synthesis device adopting the bi-arc contraction as claimed in claim 1, wherein blanks of the left connecting flange, the right connecting flange, the venturi nozzle, the first pressure guiding pipe and the second pressure guiding pipe are all class III forgings made of 15 CrMo.
7. The synthesis gas venturi flowmeter for the ammonia synthesis device adopting the bi-arc contraction as set forth in claim 1, wherein the left connecting flange, the right connecting flange, the first pressure guiding pipe and the second pressure guiding pipe are respectively welded to the venturi nozzle.
8. The synthesis gas venturi flowmeter for ammonia synthesis device adopting double circular arc contraction as claimed in claim 1, wherein the conical angle of the conical inner hole of the upper diverging section of the venturi nozzle is 30 °.
9. The synthesis gas venturi flowmeter for the synthesis ammonia device adopting the bi-arc contraction as set forth in claim 1, wherein the flange end faces of the left and right connecting flanges are respectively provided with a male spigot, the end faces of the male spigots are provided with annular grooves having trapezoidal cross sections, and the width dimension of the groove opening of the annular groove is greater than the width dimension of the groove bottom of the annular groove.
10. The synthesis gas venturi flowmeter for the synthetic ammonia device adopting the bi-arc contraction as set forth in claim 1, wherein the left and right connection flanges are respectively provided with a plurality of bolt connection holes at intervals along the circumferential direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221088170.6U CN217716509U (en) | 2022-05-09 | 2022-05-09 | Synthetic gas venturi flowmeter for synthetic ammonia device adopting double-circular-arc contraction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221088170.6U CN217716509U (en) | 2022-05-09 | 2022-05-09 | Synthetic gas venturi flowmeter for synthetic ammonia device adopting double-circular-arc contraction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117444551A (en) * | 2023-12-25 | 2024-01-26 | 常州可威尔仪表制造有限公司 | Manufacturing process and measuring method of high-precision venturi flowmeter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117444551A (en) * | 2023-12-25 | 2024-01-26 | 常州可威尔仪表制造有限公司 | Manufacturing process and measuring method of high-precision venturi flowmeter |
| CN117444551B (en) * | 2023-12-25 | 2024-03-12 | 常州可威尔仪表制造有限公司 | Manufacturing process and measuring method of high-precision venturi flowmeter |
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