CN221423880U - Butterfly valve used for ultra-high temperature working condition and having rectification function - Google Patents
Butterfly valve used for ultra-high temperature working condition and having rectification function Download PDFInfo
- Publication number
- CN221423880U CN221423880U CN202323179661.9U CN202323179661U CN221423880U CN 221423880 U CN221423880 U CN 221423880U CN 202323179661 U CN202323179661 U CN 202323179661U CN 221423880 U CN221423880 U CN 221423880U
- Authority
- CN
- China
- Prior art keywords
- rectifying
- cylinder body
- cavity
- butterfly valve
- cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001816 cooling Methods 0.000 claims abstract description 55
- 239000000110 cooling liquid Substances 0.000 claims description 12
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 8
- 230000010355 oscillation Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Details Of Valves (AREA)
Abstract
The utility model discloses a butterfly valve with a rectifying function for an ultra-high temperature working condition, which comprises a valve body and a rectifying device arranged at the medium outflow end of the valve body, wherein the rectifying device comprises a rectifying body structure, the rectifying body structure is of a conical cylindrical structure, a flange is welded at one end with a large diameter, and the flange and the valve body are fixedly arranged through bolts; the cooling inlet and the cooling outlet are respectively arranged on the lower side and the upper side of the flange, a first cooling channel is arranged in the flange, a second cooling channel is arranged in the rectifying body structure, and the first cooling channel is communicated with the second cooling channel. The butterfly valve solves the problems of flow field oscillation and pressure fluctuation of the outflow end, has good cooling effect, can ensure the strength and stability under the over-temperature working condition, has a simple structure and a small length, occupies a small space, is convenient for the arrangement of pipelines, and has strong application value.
Description
[ Field of technology ]
The utility model belongs to the technical field of butterfly valves, and particularly relates to a butterfly valve with a rectification function for an ultra-high temperature working condition.
[ Background Art ]
Butterfly valves are often used as flow control and regulation devices in industrial applications such as power engineering, chemical engineering, marine applications, etc. due to their relatively simple structure and convenient operation. When the butterfly valve is not fully opened, namely, the butterfly valve is small in flow area, the speed, pressure and density of the medium are changed, and according to the fluid mechanics principle, when the fluid flows in the narrow channel, the flow speed is increased, so that the pressure is reduced, and when the medium passes through the narrow channel, pressure oscillation is generated due to the damage of a stable state and the action of inertia effect. When the butterfly valve is not fully opened and flow control is implemented, larger flow separation often occurs behind the valve, and adverse phenomena such as structural surge, noise, pressure fluctuation and the like are extremely easy to occur.
The patent publication No. CN101162053A discloses a silencing gas butterfly valve, which comprises a valve body, the tip is fixed with the amortization pipe behind the valve body, is provided with the rectification cup in the amortization pipe, and the cup section of thick bamboo of rectification cup is the toper, and the cup end is connected to the less one end of diameter, and the great one end of diameter is fixed on the amortization pipe inner wall, and be located and be close to valve body one side, evenly distributed has a plurality of rectification holes on the cup section of thick bamboo of rectification cup and the cup end, and the rectification cup can comb the turbulent air flow steadily, weakens the noise, reaches the noise elimination effect.
The patent publication No. CN 219062625U discloses a hole type butterfly valve of making an uproar falls, including the butterfly valve body, the butterfly valve export of butterfly valve body is installed and is fallen the device of making an uproar, the base of falling the device of making an uproar is fixed in the butterfly valve board and rotates regional outside, the base is being close to one side of butterfly valve export is installed an arcwall face, distributes on the arcwall face and has the hole of making an uproar that falls, the hole evenly distributed of making an uproar falls on the arcwall face, through making the medium that circulates in the butterfly valve pass through the device of making an uproar that falls in the flow process, noise and vibration that the medium produced in the flow process are reduced.
Although the two technical schemes are that a rectifying device with a pore plate is arranged at the outlet of a butterfly valve to achieve the rectifying and noise reducing effects, on some special ultra-high temperature adjusting devices, the medium temperature can reach 1200 ℃, the rectifying device behind the butterfly valve needs to bear medium pressure and high-temperature impact at the same time, in the two technical schemes, the rectifying device is arranged in a tubular channel behind the butterfly valve, the rectifying device is easy to deviate under the condition of multiple impact at high temperature, meanwhile, the strength of the rectifying device is reduced under the high temperature, and the rectifying device can fail to cause the condition requirement of the ultra-high temperature to be not met.
Therefore, it is necessary to provide a butterfly valve with rectification function for ultra-high temperature conditions to solve the above technical problems.
[ utility model ]
The utility model mainly aims to provide the butterfly valve with the rectification function for the ultra-high temperature working condition, solves the problems of flow field oscillation and pressure fluctuation of an outflow end, has a good cooling effect, can ensure the strength and stability under the ultra-high temperature working condition, has a simple structure, is small in length and small in occupied space, is convenient for the arrangement of pipelines, and has a very high application value.
The utility model realizes the aim through the following technical scheme: the butterfly valve comprises a valve body and a rectifying device arranged at the medium outflow end of the valve body, wherein the rectifying device comprises a rectifying body structure, the rectifying body structure is of a conical cylindrical structure, a flange is welded at one end with a large diameter, and the flange and the valve body are fixedly arranged through bolts; the cooling inlet and the cooling outlet are respectively arranged on the lower side and the upper side of the flange, a first cooling channel is arranged in the flange, a second cooling channel is arranged in the rectifying body structure, and the first cooling channel is communicated with the second cooling channel.
Further, the rectifying body structure comprises a first barrel with a decreasing diameter and a second barrel with a constant diameter arranged at the tail part, the high-speed vortex medium flows through the first barrel and is converged in a central area of a medium flow passage, and stable flow is formed under a short flow path when the medium flows through the second barrel.
Furthermore, the periphery of the rectifying body structure and the inner wall of the pipeline arranged at the rear end of the rectifying device form an instantaneous stagnation area, the medium in the instantaneous stagnation area can form stable flow under a short flow path by being carried by high-speed airflow of the main flow.
Further, the rectifying body structure is arranged to be of a double-layer cylindrical structure and comprises an inner cylinder body and an outer cylinder body, the inner cylinder body and the outer cylinder body both comprise a first cylinder body and a second cylinder body, a first cavity is formed in the middle of the first cylinder body of the inner cylinder body and the two first cylinder bodies of the outer cylinder body, a second cavity is formed in the middle of the second cylinder body of the inner cylinder body and the two second cylinder bodies of the outer cylinder body, and the tail end of the second cavity is arranged to be a closed end.
Further, the inner cylinder and the outer cylinder are respectively provided with a first end face and a second end face at one end of the first cylinder, and the second end face is arranged on the periphery of the inner cylinder; the inlet and the outlet of the cooling liquid inlet and outlet of the rectifying body structure are arranged on opposite sides and have the same structure, and are formed by being jointly enclosed by the first end face, the second end face and the outer wall of the inner cylinder; the rectifying body structure is provided with the second cooling channel which flows from the inlet to the interiors of the first cavity and the second cavity and is converged to the outlet from the interiors of the first cavity and the second cavity.
Further, the first end face is welded at one end inside the flange, the second end face is welded at the other end inside the flange, the cooling inlet is communicated with the inlet, and the cooling outlet is communicated with the outlet.
Further, a plurality of guide plate ribs are arranged between the inner cylinder body and the outer cylinder body, the guide plate ribs comprise first guide plate ribs clamped between the first end face and the second end face and second guide plate ribs extending into the first cavity, and one side of each second guide plate rib is propped against the inner cylinder body, and the other side of each second guide plate rib is propped against the outer cylinder body.
Further, a plurality of dredging holes are formed in the second guide plate ribs, and cooling liquid fills the cavity at the lower side of the rectifying body structure and enters the cavity at the upper side of the rectifying body structure through the dredging holes.
Compared with the prior art, the butterfly valve with the rectification function for the ultra-high temperature working condition has the beneficial effects that: (1) The rectifying device arranged on the butterfly valve comprises a rectifying body structure, wherein the rectifying body structure is of a conical cylindrical structure and comprises a first cylinder body with the diameter gradually reduced and a second cylinder body with the diameter unchanged, wherein the diameter arranged on the tail part of the first cylinder body is fixed with the flange arranged on one end of the first cylinder body through bolt installation, and the rectifying device can still keep stable in structure even under medium pressure and high temperature impact through bolt installation and fixation; the rectifying body structure of the conical cylindrical structure is arranged in a turbulent flow field after throttling of the ultra-high temperature butterfly valve, so that medium of flowing high-speed vortex airflow flows through the first cylinder to be converged in a central area of a channel, the flow speed and the pressure of the medium are rapidly reduced, and then stable flow is formed under a short flow when the medium flows through the second cylinder with the same diameter, so that vibration generated in the medium flow is reduced;
(2) The rectifying body structure is a double-layer cylindrical structure, the rectifying body structure comprises an inner cylinder body and an outer cylinder body, the inner cylinder body and the outer cylinder body are jointly formed with a second cooling channel which flows from an inlet to a first cavity, a second cavity and is converged to an outlet from the first cavity and the second cavity, cooling liquid enters the cavity filled with the lower side of the rectifying body structure from the first cooling channel of the flange and enters the cavity at the upper side through the sparse holes, so that the cooling liquid is filled with the whole cavity of the rectifying body structure, and enters the cooling outlet of the flange from the cavity at the upper side of the rectifying body structure.
Therefore, the butterfly valve of this scheme has not only solved the flow field of outflow end and has oscillated and pressure fluctuation's problem, has good cooling effect moreover, can guarantee intensity and stability under the super temperature operating mode, and fairing simple structure and length are little simultaneously, and occupation of land space is few, and the pipeline's of being convenient for is arranged, has very strong using value.
[ Description of the drawings ]
FIG. 1 is a schematic view of a butterfly valve in a three-dimensional structure according to an embodiment of the utility model;
FIG. 2 is a schematic diagram of a cross-sectional structure of a butterfly valve according to an embodiment of the utility model;
FIG. 3 is a schematic cross-sectional view of a rectifying device according to an embodiment of the present utility model;
FIG. 4 is a schematic cross-sectional view of a rectifying device according to an embodiment of the present utility model;
FIG. 5 is a schematic perspective view of a rectifying device according to an embodiment of the present utility model;
FIG. 6 is a schematic diagram illustrating a three-dimensional structure of a rectifying body according to an embodiment of the present utility model;
the figures represent the numbers:
100-butterfly valve, 200-pipeline;
1-a valve body and 2-a rectifying device;
3-rectifying body structure, 31-first cylinder, 311-first end face, 312-second end face, 32-second cylinder, 33-inner cylinder, 34-outer cylinder, 351-first cavity, 352-second cavity, 36-inlet, 37-outlet, 38-guide rib, 381-first guide rib, 382-second guide rib, 39-guide hole;
4-flange, 41-cooling inlet, 42-cooling outlet, 43-first cooling channel;
5-second cooling channel, 6-transient stagnation zone.
[ Detailed description ] of the invention
Referring to fig. 1-6, the present embodiment is a butterfly valve with rectification function for ultra-high temperature conditions, and the butterfly valve 100 includes a valve body 1 and a rectification device 2 mounted at a medium outflow end of the valve body 1.
The rectifying device 2 comprises a rectifying body structure 3, the rectifying body structure 3 is of a conical tubular structure, one end with a large diameter is welded with a flange 4, the flange 4 and the valve body 1 are fixedly installed through bolts, and the rectifying device 2 and the valve body are fixedly installed through bolts, so that the rectifying device 2 can keep stable in structure even under medium pressure and high-temperature impact; the lower side and the upper side of the flange 4 are respectively provided with a cooling inlet 41 and a cooling outlet 42, a first cooling channel 43 is arranged in the flange 4, a second cooling channel 5 is arranged in the rectifying body structure 3, and the first cooling channel 43 is communicated with the second cooling channel 5.
The rectifying body structure 3 comprises a first cylinder 31 with a decreasing diameter and a second cylinder 32 with a constant diameter, wherein the diameter is arranged at the tail part of the second cylinder, the rectifying body structure 3 with a conical cylindrical structure is arranged in a turbulent flow field after throttling of an ultra-high temperature butterfly valve, so that high-speed vortex media flow through the first cylinder 31 and are converged in a central area of a media flow channel, the flow speed and the pressure of the media are rapidly reduced, and then the media flow through the second cylinder 32 to form stable flow in a very short flow path, thereby reducing noise and vibration generated in the media flow; meanwhile, an instantaneous stagnation area 6 is formed outside the rectifying body structure 3 and the inner wall of the pipeline 200 arranged at the rear end of the rectifying device 2, and medium in the instantaneous stagnation area 6 can form stable flow under a short flow when being carried by high-speed airflow of main flow; therefore, the flow field vibration and pressure fluctuation problem of the butterfly valve outflow end is solved by the rectifying body structure 3, and meanwhile, the rectifying body structure 3 is simple in structure, small in length, small in occupied space, convenient for arrangement of pipelines and high in application value.
The rectifying body structure 3 is arranged into a double-layer cylindrical structure and comprises an inner cylinder 33 and an outer cylinder 34, wherein the inner cylinder 33 and the outer cylinder 34 both comprise a first cylinder 31 and a second cylinder 32 arranged at the tail part, a first cavity 351 is formed between the two first cylinders 31 of the inner cylinder 33 and the outer cylinder 34, a second cavity 352 is formed between the two second cylinders 32 of the inner cylinder 33 and the outer cylinder 34, and the first cavity 351 is communicated with the second cavity 352; the inner barrel 31 and the second barrel 32 of the outer barrel 34 are connected to each other at their ends to form a closed end, i.e., the end of the second cavity 352 is a closed end.
The inner cylinder 33 and the outer cylinder 34 are provided with a first end surface 311 and a second end surface 312 at one end of the first cylinder 31, respectively, and the second end surface 312 is provided on the outer periphery of the inner cylinder 33; the inlet 36 and the outlet 37 for the cooling liquid to enter and exit the rectifying body structure 3 are arranged on opposite sides and have the same structure, and are formed by being jointly enclosed by the first end face 311, the second end face 312 and the outer wall of the inner barrel 33; the rectifying body structure 3 is provided with a second cooling passage 5 flowing from the inlet 36 to the inside of the first cavity 351 and the second cavity 352 and converging from the inside of the first cavity 351 and the second cavity 352 to the outlet 37.
A plurality of guide plate ribs 38 are arranged between the inner cylinder 33 and the outer cylinder 34, the guide plate ribs 38 comprise a first guide plate rib 381 which is clamped between the first end face 311 and the second end face 312 and a second guide plate rib 382 which extends into the first cavity 352, one side of the second guide plate rib 382 is abutted against the inner cylinder 33, and the other side is abutted against the outer cylinder 34; the second guide rib 382 is provided with a plurality of dredging holes 39, cooling liquid is filled in the cavity at the lower side of the rectifying body structure 3 and enters the cavity at the upper side through the dredging holes 39, so that the cooling liquid is filled in the whole cavity of the rectifying body structure 3, and good cooling effect of the rectifying body structure 3 can be ensured.
The first end face 311 of the inner cylinder 33 is welded to one end inside the flange 4, the second end face 312 of the outer cylinder 34 is welded to the other end inside the flange 4, the cooling inlet 41 in the flange 4 is in communication with the inlet 36 of the rectifying body structure 3, and the cooling outlet 42 in the flange 4 is in communication with the outlet 37 of the rectifying body structure 3.
The cooling principle of this scheme: the cooling liquid enters the first cooling channel 43 from the cooling inlet 41 of the flange 4 of the rectifying device 2, the first cooling channel 43 is communicated with the inlet 36 of the rectifying body structure 3, flows from the inlet 36 to the inside of the first cavity 351 and the second cavity 352, is converged to the outlet 37 of the rectifying body structure 3 from the inside of the first cavity 351 and the inside of the second cavity 352, and flows from the outlet 37 to the first cooling channel 43 of the flange 4 so as to flow out from the cooling outlet of the flange 4.
The scheme is that the rectifying device 2 arranged on the butterfly valve 100 comprises a rectifying body structure 3, wherein the rectifying body structure 3 is of a conical cylindrical structure and comprises a first cylinder 31 with gradually reduced diameter and a second cylinder 32 with unchanged diameter arranged at the tail, a flange 4 arranged at one end of the first cylinder 31 is fixedly arranged on the valve body 1 through bolts, and the rectifying device 2 can still keep stable in structure even under medium pressure and high-temperature impact through the bolt installation and fixation; the rectifying body structure 3 with a conical cylindrical structure is arranged in a turbulent flow field after the ultra-high temperature butterfly valve throttles, so that the medium of the flowing high-speed vortex air flow flows through the first cylinder 31 to be converged in the central area of the channel, the flow speed and the pressure of the medium are rapidly reduced, and then the medium flows through the second cylinder 32 with the same diameter to form stable flow under a short flow path, so that the vibration generated in the medium flow is reduced;
(2) The rectifying body structure 3 is a double-layer cylindrical structure, and comprises an inner cylinder 33 and an outer cylinder 34, wherein the inner cylinder 33 and the outer cylinder 34 are jointly formed with a second cooling channel 5 which flows from an inlet 36 to a first cavity 351 and a second cavity 352 and is converged to an outlet 37 from the first cavity 351 and the second cavity 352, cooling liquid enters the cavity filled with the lower side of the rectifying body structure 3 from the first cooling channel 43 of the flange 4 and enters the cavity at the upper side through a sparse guide hole 39, so that the cooling liquid fills the whole cavity of the rectifying body structure 3, and enters a cooling outlet of the flange 4 from the cavity at the upper side of the rectifying body structure 3, and the rectifying device 2 has good cooling effect and can ensure strength and stability under an over-temperature working condition.
Therefore, compared with the prior art, the butterfly valve 100 of the scheme not only solves the problems of flow field oscillation and pressure fluctuation of the outflow end, but also has good cooling effect, can ensure the strength and stability under the over-temperature working condition, and meanwhile, the rectifying device 2 has the advantages of simple structure, small length, small occupied space, convenience in arrangement of the pipeline 200 and high application value.
What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.
Claims (8)
1. A butterfly valve that is used for super high temperature operating mode and has rectification function, its characterized in that: the rectifying device comprises a rectifying body structure, wherein the rectifying body structure is of a conical cylindrical structure, a flange is welded at one end with a large diameter, and the flange and the valve body are fixedly arranged through bolts; the cooling inlet and the cooling outlet are respectively arranged on the lower side and the upper side of the flange, a first cooling channel is arranged in the flange, a second cooling channel is arranged in the rectifying body structure, and the first cooling channel is communicated with the second cooling channel.
2. The butterfly valve for ultra-high temperature conditions and having a rectifying function according to claim 1, wherein: the rectifying body structure comprises a first barrel with a decreasing diameter and a second barrel with a constant diameter, wherein the second barrel is arranged at the tail part of the first barrel, high-speed vortex media flow through the first barrel and are converged in a central area of a media flow passage, and stable flow is formed under a short flow path when the media flow through the second barrel.
3. The butterfly valve for ultra-high temperature conditions and having a rectifying function according to claim 1, wherein: the periphery of the rectifying body structure and the inner wall of the pipeline arranged at the rear end of the rectifying device form an instantaneous stagnation area, the instantaneous stagnation area is carried by high-speed airflow of main flow, and a medium in the instantaneous stagnation area can form stable flow in a short flow.
4. The butterfly valve for ultra-high temperature conditions and having a rectifying function according to claim 2, wherein: the rectifying body structure is arranged to be of a double-layer cylindrical structure and comprises an inner cylinder body and an outer cylinder body, wherein the inner cylinder body and the outer cylinder body both comprise a first cylinder body and a second cylinder body, a first cavity is formed in the middle of the first cylinder body and two of the inner cylinder body and the outer cylinder body, a second cavity is formed in the middle of the second cylinder body and two of the outer cylinder body, and the tail end of the second cavity is arranged to be a closed end.
5. The butterfly valve for ultra-high temperature conditions and having a rectifying function according to claim 4, wherein: the inner cylinder body and the outer cylinder body are respectively provided with a first end face and a second end face at one end of the first cylinder body, and the second end face is arranged on the periphery of the inner cylinder body; the inlet and the outlet of the cooling liquid inlet and outlet of the rectifying body structure are arranged on opposite sides and have the same structure, and are formed by being jointly enclosed by the first end face, the second end face and the outer wall of the inner cylinder; the rectifying body structure is provided with the second cooling channel which flows from the inlet to the interiors of the first cavity and the second cavity and is converged to the outlet from the interiors of the first cavity and the second cavity.
6. The butterfly valve for ultra-high temperature conditions and having a rectifying function according to claim 5, wherein: the first end face is welded at one end inside the flange, the second end face is welded at the other end inside the flange, the cooling inlet is communicated with the inlet, and the cooling outlet is communicated with the outlet.
7. The butterfly valve for ultra-high temperature conditions and having a rectifying function according to claim 5, wherein: the inner cylinder body and the outer cylinder body are provided with a plurality of guide plate ribs therebetween, the guide plate ribs comprise first guide plate ribs clamped between the first end face and the second end face and second guide plate ribs extending into the first cavity, one side of each second guide plate rib is propped against the inner cylinder body, and the other side of each second guide plate rib is propped against the outer cylinder body.
8. The butterfly valve for ultra-high temperature conditions and having a rectifying function according to claim 7, wherein: and a plurality of dredging holes are formed in the second guide plate ribs, and cooling liquid fills the cavity at the lower side of the rectifying body structure and enters the cavity at the upper side of the rectifying body structure through the dredging holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323179661.9U CN221423880U (en) | 2023-11-24 | 2023-11-24 | Butterfly valve used for ultra-high temperature working condition and having rectification function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323179661.9U CN221423880U (en) | 2023-11-24 | 2023-11-24 | Butterfly valve used for ultra-high temperature working condition and having rectification function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221423880U true CN221423880U (en) | 2024-07-26 |
Family
ID=92013282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323179661.9U Active CN221423880U (en) | 2023-11-24 | 2023-11-24 | Butterfly valve used for ultra-high temperature working condition and having rectification function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221423880U (en) |
-
2023
- 2023-11-24 CN CN202323179661.9U patent/CN221423880U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111468319B (en) | Multi-jet-hole gas-liquid two-phase atomizing nozzle | |
| CN112627904B (en) | Novel bucket type air film cooling hole and design method thereof | |
| CN221423880U (en) | Butterfly valve used for ultra-high temperature working condition and having rectification function | |
| CN103486328B (en) | Low noise cage type regulating valve | |
| CN215172716U (en) | Novel bypass pressure reducing valve | |
| CN111895175B (en) | Mobile self-adaptive rectifying device for process valve | |
| CN212930540U (en) | Vortex tube based on Laval nozzle expansion section | |
| CN211501654U (en) | Satisfy governing valve that bubble level let out leakage quantity under hard seal | |
| CN111895098A (en) | Throttling device for flow-regulating pressure-regulating valve | |
| CN112413917A (en) | Vortex tube with double-layer structure | |
| CN109973154B (en) | aeroengine turbine blade with cooling structure | |
| CN109237830A (en) | Coaxial type pulse pipe refrigerator cold end and refrigeration machine based on the cold end | |
| CN104454656A (en) | Flow control method adopting hole-type circumferentially slotted casing treatment with back cavities | |
| CN103174874B (en) | Low-noise line pipe butterfly valve | |
| CN210105928U (en) | Novel impingement cooling turbulence structure | |
| CN202927240U (en) | Butterfly-valve noise-attenuating device | |
| CN112240650B (en) | Straight-through slit precooling heat exchanger of precooling type low-temperature throttling refrigerator and manufacturing method | |
| CN112145233B (en) | S-shaped rotary cavity laminate cooling structure | |
| CN207879963U (en) | Low noise throttle valve on oil-pressure damper | |
| CN210522282U (en) | Combined cavitator capable of being adjusted online | |
| CN114876582B (en) | Turbine blade and aeroengine | |
| CN220134737U (en) | Expansion valve and air conditioning system | |
| CN204533719U (en) | External seal butterfly valve diverter unit | |
| CN205401769U (en) | Squirrel -cage piston control valve | |
| CN114110198B (en) | Low-noise valve core device based on bionic structure vein fractal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |