CN112032359B - Switching device for outlet channel of sealing fan - Google Patents
Switching device for outlet channel of sealing fan Download PDFInfo
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- CN112032359B CN112032359B CN202011048086.7A CN202011048086A CN112032359B CN 112032359 B CN112032359 B CN 112032359B CN 202011048086 A CN202011048086 A CN 202011048086A CN 112032359 B CN112032359 B CN 112032359B
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- pipeline
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- gate valve
- pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/14—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by one actuating member, e.g. a handle
- F16K11/16—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by one actuating member, e.g. a handle which only slides, or only turns, or only swings in one plane
- F16K11/161—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by one actuating member, e.g. a handle which only slides, or only turns, or only swings in one plane only slides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/003—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by throttling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/403—Casings; Connections of working fluid especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention discloses a switching device for an outlet channel of a sealing fan, which comprises a first pipeline and a second pipeline, wherein a first gate valve is arranged on the first pipeline, and a second gate valve is arranged on the second pipeline; one end of the first pipeline is used for being communicated with an outlet of the first sealed fan, one end of the second pipeline is used for being communicated with an outlet of the second sealed fan, and the other end of the first pipeline and the other end of the second pipeline are respectively connected to the air outlet main pipe; the piston and the two ends of the cylinder body form a first cavity and a second cavity respectively; the first cavity and the second cavity are respectively communicated with an outlet of the first sealed fan and an outlet of the second sealed fan, and the first piston rod and the second piston rod are respectively in driving connection with the first gate valve and the second gate valve. The gate valve has good sealing performance; the single-piston double-head rod is used as an actuating mechanism to realize mechanical interlocking; the automatic switching is realized by the pressure difference of the system.
Description
Technical Field
The invention relates to the field of automatic switching control, in particular to a switching device for an outlet channel of a sealing fan.
Background
At present, all adopt the fan of parallel arrangement as the power source of sealed wind in power plant boiler powder process system, parallelly connected fan (sealed fan) one is equipped with one and uses the setting, because must guarantee in the powder process system operation that sealed wind is incessant, under the fan fault condition for guaranteeing the operation, quick automatic switch-over to reserve fan, set up a tee bend baffle door at two fan exports usually, the tee bend baffle passes through the wind pressure control under the normal condition, also can control through supporting actuating mechanism under the special circumstances, after a fan starts, produce the wind pressure on the outlet duct of this fan, the baffle that promotes the tee bend baffle door beats to another fan outlet side, thereby realize that the fan starts the back automatic passageway of opening, close the function of offside fan passageway, thereby reach the purpose of automatic fast switch-over outlet duct.
Above-mentioned three-way baffle's mode, though can realize reaching automatic switch, satisfy the basic function requirement of fan operation, nevertheless have certain defect and not enough in the use: (1) because the baffle is arranged in the common air duct of the two fans, the baffle has faults of jamming or falling off and the like, and the baffle cannot be overhauled on line; (2) because the baffle is a pure baffle and has no sealing surface, the sealing performance is not enough; (3) because the baffle is arranged in the air duct, the stroke position of the baffle cannot be visually seen, so that the actual position of the baffle cannot be judged; (4) the rotating shaft and the baffle door of the baffle are arranged inside the air duct, so that maintenance cannot be carried out, and the operation condition of the fan is influenced after the rotating shaft and the baffle door are separated or jammed, so that the safety of the unit is influenced.
Disclosure of Invention
The invention discloses a switching device for an outlet channel of a sealing fan, which aims to solve the problems that the existing three-way baffle has insufficient sealing performance, cannot visually see the position of the baffle, cannot be overhauled on line and the like.
In order to solve the problems, the invention adopts the following technical scheme:
a sealed fan outlet channel switching device comprising:
the pipeline structure comprises a first pipeline and a second pipeline, wherein the first pipeline and the second pipeline are arranged in parallel, a first gate valve is arranged on the first pipeline, and a second gate valve is arranged on the second pipeline; one end of the first pipeline is used for being communicated with an outlet of a first sealed fan, one end of the second pipeline is used for being communicated with an outlet of a second sealed fan, and the other end of the first pipeline and the other end of the second pipeline are respectively connected to an air outlet main pipe;
the cylinder comprises a cylinder body, a piston positioned in the cylinder body, and a first piston rod and a second piston rod which are positioned on two sides of the piston, wherein a first cavity and a second cavity are respectively formed at two ends of the piston and the cylinder body;
the first cavity and the second cavity are respectively communicated with an outlet of the first sealed fan and an outlet of the second sealed fan, and the first piston rod and the second piston rod are respectively in driving connection with the first gate valve and the second gate valve.
The first pipeline comprises a first air inlet pipe and a first air outlet pipe, the second pipeline comprises a second air inlet pipe and a second air outlet pipe, the first air inlet pipe is used for being communicated with an outlet of a first sealed fan, the second air inlet pipe is used for being communicated with an outlet of a second sealed fan, the first air outlet pipe and the second air outlet pipe are respectively connected to the air outlet female pipe, the first gate valve is located the first air inlet pipe and between the first air outlet pipe, and the second gate valve is located the second air inlet pipe and between the second air outlet pipe.
The first valve rod of the first gate valve and the second valve rod of the second gate valve are arranged oppositely, the cylinder is located between the first valve rod and the second valve rod, the first piston rod is connected with the first valve rod, and the second piston rod is connected with the second valve rod.
The first gate valve and the second gate valve are located at the same height.
A first adjusting nut is arranged between the first piston rod and the first valve rod, and a second adjusting nut is arranged between the second piston rod and the second valve rod.
The tail ends of the first piston rod and the first valve rod are respectively provided with threads with opposite turning directions, and the tail ends of the second piston rod and the second valve rod are respectively provided with threads with opposite turning directions.
The first cavity is communicated with the first air inlet pipe through a first air pressure pipe, and the second cavity is communicated with the second air inlet pipe through a second air pressure pipe.
And a first shutoff valve is arranged on the first air pressure pipe, and a second shutoff valve is arranged on the second air pressure pipe.
The first cavity and the second cavity are communicated with an auxiliary air source through a third pipeline and a fourth pipeline respectively.
And a third shutoff valve is arranged on the third pipeline, and a fourth shutoff valve is arranged on the fourth pipeline.
The technical scheme adopted by the invention can achieve the following beneficial effects: the switching device for the outlet channel of the sealing fan adopts the gate valve for sealing, and has good sealing performance and high reliability; the gate valves are positioned on different branches, and can control the on-off of the branches in the system running state to overhaul the gate valves of the cut-off branches; the on-off condition of each gate valve can be determined by observing the position of the valve rod of the gate valve.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of the outlet channel switching device of the sealing fan of the present invention.
Description of reference numerals:
1 first gate valve
2 second gate valve
3 first sealed fan
4 second sealing fan
5 air outlet main pipe
6 cylinder
7 cylinder body
8 piston
9 first piston rod
10 second piston rod
11 first chamber
12 second Chamber
13 first air inlet pipe
14 first air outlet pipe
15 second intake pipe
16 second air outlet pipe
17 first valve stem
18 second valve stem
19 first adjusting nut
20 second adjusting nut
21 first wind pressure pipe
22 second wind pressure pipe
23 first shut-off valve
24 second shut-off valve
25 third pipeline
26 fourth pipeline
27 third shut-off valve
28 fourth shutoff valve
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides a device for switching an outlet channel of a sealed blower, including a first pipeline and a second pipeline which are arranged in parallel, wherein one end of the first pipeline is communicated with an outlet of a first sealed blower 3, one end of the second pipeline is communicated with an outlet of a second sealed blower 4, the other end of the first pipeline and the other end of the second pipeline are respectively connected to a main outlet pipe 5, the first pipeline and the second pipeline are respectively connected to the first sealed blower 3 and the second sealed blower 4, the first sealed blower 3 and the second sealed blower 4 are used as backup, the sealed blower connected with the communicating pipeline is controlled to work by controlling the on-off state of the first pipeline and the second pipeline, at this time, the sealed blower connected with the shut-off pipeline can be overhauled, and thus the operation of a system is not required to be shut off when the sealed blower is overhauled.
Set up first push-pull valve 1 on the first pipeline, set up second push-pull valve 2 on the second pipeline, control first pipeline and second pipeline through the push-pull valve, the push-pull valve leakproofness is good, can improve whole auto-change over device's reliability, and the valve rod position of push-pull valve can demonstrate directly perceivedly, so the user can observe the break-make condition of pipeline directly perceivedly.
The switching device further comprises a cylinder 6, the cylinder 6 is in a single-piston double-head belt rod mode, the cylinder 6 comprises a cylinder body 7, a piston 8 located in the cylinder body 7, a first piston rod 9 and a second piston rod 10 located on two sides of the piston 8, a first cavity 11 and a second cavity 12 are formed at two ends of the piston 8 and two ends of the cylinder body 7 respectively, and the single-piston double-head rod is adopted as an executing mechanism to achieve mechanical interlocking.
Wherein, first cavity 11 and second cavity 12 communicate with the export of first sealed fan 3 and the export of first sealed fan 3 respectively, first piston rod 9 and second piston rod 10 are connected with the drive of first push-pull valve 1 and second push-pull valve 2 respectively, the export of two sealed fans communicates with two cavitys of cylinder 6 respectively, utilize the pressure differential of two sealed fans to realize piston 8's control, the state of sealed fan is different, the pressure of its exit (two cavitys promptly) is also different, the motion of controlling cylinder 6 piston through this pressure, thereby drive the motion of piston rod, two piston rods are connected with the push-pull valve drive on the pipeline respectively, thereby the state of control push-pull valve, can be one-on-off or two all switch on half, thereby realize realizing the automatic switch-over of passageway according to the sealed fan state.
The invention realizes automatic switching control by utilizing the pressure difference of the system, adopts a single-piston double-end rod as an actuating mechanism, realizes mechanical interlocking, namely, utilizes the pressure difference of the outlet of the sealing fan, adopts two piston rods of a single cylinder 6 to control the states of two gate valves in a linkage manner, realizes the functions of mechanical interlocking and automatic switching of the outlet channel switching device, and achieves the purpose that the outlet channel of the sealing fan is switched according to the starting and stopping of the fan.
In an embodiment of the present invention, the first pipeline includes a first inlet pipe 13 and a first outlet pipe 14, the second pipeline includes a second inlet pipe 15 and a second outlet pipe 16, the first inlet pipe 13 is used for communicating with an outlet of the first sealing fan 3, the second inlet pipe 15 is used for communicating with an outlet of the second sealing fan 4, the first outlet pipe 14 and the second outlet pipe 16 are respectively connected to the outlet main pipe 5, the first gate valve 1 is located between the first inlet pipe 13 and the first outlet pipe 14, and the second gate valve 2 is located between the second inlet pipe 15 and the second outlet pipe 16.
The gate valve includes opening, valve plate and valve rod, and the valve rod is connected with the valve plate, thereby controls the valve plate motion and makes valve plate shutoff opening and open the opening, realizes the break-make of gate valve, sets up seal structure in the gate valve on the valve plate, improves the leakproofness when the gate valve is shut off, and the first valve rod 17 of first gate valve 1 and the second valve rod 18 of second gate valve 2 set up relatively, and cylinder 6 is located between first valve rod 17 and the second valve rod 18, and first piston rod 9 is connected with first valve rod 17, and second piston rod 10 is connected with second valve rod 18. Thereby realize that a cylinder 6 realizes the control to two valve rods to the break-make of two push-pull valves of control.
Preferably, first push-pull valve 1 and second push-pull valve 2 are located the same height, and preferably first valve rod 17 and second valve rod 18 are also located the same height, are located collinear and relative setting, and the centre sets up cylinder 6, and cylinder 6 carries out coordinated control to two valve rods.
A first adjusting nut 19 is arranged between the first piston rod 9 and the first valve stem 17 and a second adjusting nut 20 is arranged between the second piston rod 10 and the second valve stem 18. Through rotating the adjusting nut, the piston rod and the valve rod of the gate valve can be close to or far away from each other, so that the relative distance between the piston rod and the valve rod of the gate valve is adjusted, the piston rod drives the valve rod to move, and the valve rod drives the valve plate of the gate valve to move, so that the gate valve is controlled to be turned on or off. The relative position of the valve rod and the piston rod is adjusted by adopting the adjusting nut, so that the precise control is realized.
In one form, the ends of the first piston rod 9 and the first valve stem 17 are provided with threads of opposite hand, and the ends of the second piston rod 10 and the second valve stem 18 are provided with threads of opposite hand, respectively, and the adjusting nut is screwed in one direction, the piston rods and the valve stems being far from or close to each other.
In the embodiment of the present invention, the first cavity 11 is communicated with the first air inlet pipe 13 through a first air pressure pipe 21, and the second cavity 12 is communicated with the second air inlet pipe 15 through a second air pressure pipe 22. The pressure at the cavity is ensured to be the same as the pressure at the outlet of the communicated sealing fan, so that the pressure in the cavity is controlled according to the state of the sealing fan, the movement of the piston 8 is realized, and further the movement of the piston rod is driven, a first shut-off valve 23 is arranged on the first air pressure pipe 21, a second shut-off valve 24 is arranged on the second air pressure pipe 22, and the on-off of the pipeline can be manually controlled by setting the shut-off valves. Can set up annular groove at 6 both sides tip of cylinder, set up the trompil on the recess, insert the wind-pressure pipe through the trompil.
The first chamber 11 and the second chamber 12 are respectively communicated with an auxiliary air source through a third pipeline 25 and a fourth pipeline 26. Compressed air can be supplemented to the air cylinder 6 through a third pipeline 25 and a fourth pipeline 26, a third shut-off valve 27 is arranged on the third pipeline 25, a fourth shut-off valve 28 is arranged on the fourth pipeline 26, and the shut-off valves can be arranged to control the on-off of the pipelines manually. Under the condition that the sealing fans on the two sides are stopped, the position of the piston 8 can be controlled by the on-off of the auxiliary air source, so that the positions of the gate valves on the two sides are controlled. Can set up annular groove at 6 both sides tip of cylinder, set up the trompil on the recess, insert the pipeline with supplementary air supply intercommunication through the trompil.
When the air conditioner works normally, the side A sealing fan operates, the side B sealing fan stops operating, and because the outlet pressure of the side A sealing fan is greater than the outlet pressure of the side B sealing fan, the piston 8 moves towards the side B, the side A gate valve is opened, and the side B gate valve is closed. When the A side sealing fan is out of order and stopped, the B side sealing fan is started in an interlocking mode, the outlet pressure of the B side sealing fan is larger than the outlet pressure of the A side sealing fan, the piston 8 moves towards the A side, the B side gate valve is opened, the A side gate valve is closed, and therefore automatic switching of the outlet channel is achieved. When the sealing fans on the two sides operate simultaneously, the pistons 8 are in the middle positions due to pressure balance, and therefore the gate valves on the two sides are half opened. Under the condition that the sealing fans on the two sides are stopped, the position of the piston 8 can be controlled by the on-off of the auxiliary air source, so that the positions of the gate valves on the two sides are controlled.
The invention adopts the gate valve for control, has good sealing performance, and can visually see the position of the valve rod of the gate valve, thereby visually seeing the state of the gate valve and simultaneously overhauling can be carried out through isolating one side under the condition of failure. The cylinder 6 adopts a mode of a single-piston double-end rod to realize mechanical interlocking, and the relative positions of the two doors can be accurately positioned by adjusting the adjusting nut. The piston position control is realized by adopting the self pressure difference, and the automatic switching control is realized in a mechanical mode without any external intervention in a normal state.
In the above embodiments of the present invention, the difference between the embodiments is mainly described, and different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory, and further description is omitted here in view of brevity of the text.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a sealed fan outlet passage auto-change over device which characterized in that includes:
the pipeline comprises a first pipeline and a second pipeline, wherein the first pipeline and the second pipeline are arranged in parallel, a first gate valve (1) is arranged on the first pipeline, and a second gate valve (2) is arranged on the second pipeline; one end of the first pipeline is used for being communicated with an outlet of a first sealing fan (3), one end of the second pipeline is used for being communicated with an outlet of a second sealing fan (4), and the other end of the first pipeline and the other end of the second pipeline are respectively connected to a gas outlet main pipe (5);
the cylinder comprises a cylinder body (7), a piston (8) positioned in the cylinder body (7), a first piston rod (9) and a second piston rod (10) positioned on two sides of the piston (8), and a first cavity (11) and a second cavity (12) are respectively formed at two ends of the piston (8) and two ends of the cylinder body (7);
the first cavity (11) and the second cavity (12) are communicated with an outlet of the first sealing fan (3) and an outlet of the second sealing fan (4) respectively, and the first piston rod (9) and the second piston rod (10) are in driving connection with the first gate valve (1) and the second gate valve (2) respectively.
2. The sealing fan outlet channel switching device according to claim 1, wherein the first pipeline comprises a first air inlet pipe (13) and a first air outlet pipe (14), the second pipeline comprises a second air inlet pipe (15) and a second air outlet pipe (16), the first air inlet pipe (13) is used for being communicated with an outlet of a first sealing fan (3), the second air inlet pipe (15) is used for being communicated with an outlet of a second sealing fan (4), the first air outlet pipe (14) and the second air outlet pipe (16) are respectively connected to the air outlet main pipe (5), the first gate valve (1) is located between the first air inlet pipe (13) and the first air outlet pipe (14), and the second gate valve (2) is located between the second air inlet pipe (15) and the second air outlet pipe (16).
3. The sealing fan outlet channel switching device according to claim 2, characterized in that a first valve rod (17) of the first gate valve (1) and a second valve rod (18) of the second gate valve (2) are oppositely arranged, the cylinder (6) is located between the first valve rod (17) and the second valve rod (18), the first piston rod (9) is connected with the first valve rod (17), and the second piston rod (10) is connected with the second valve rod (18).
4. The switching device of the outlet channel of the sealing fan according to claim 3, characterized in that the first gate valve (1) and the second gate valve (2) are located at the same height.
5. The sealing fan outlet channel switching device according to claim 4, characterized in that a first adjusting nut (19) is arranged between the first piston rod (9) and the first valve stem (17), and a second adjusting nut (20) is arranged between the second piston rod (10) and the second valve stem (18).
6. The switching device of the outlet channel of the sealing fan as claimed in claim 5, wherein the ends of the first piston rod (9) and the first valve rod (17) are respectively provided with threads with opposite turning directions, and the ends of the second piston rod (10) and the second valve rod (18) are respectively provided with threads with opposite turning directions.
7. The device for switching the outlet channel of the sealing fan according to claim 2, wherein the first cavity (11) is communicated with the first air inlet pipe (13) through a first air pressure pipe (21), and the second cavity (12) is communicated with the second air inlet pipe (15) through a second air pressure pipe (22).
8. The device for switching the outlet channel of the sealing fan according to claim 7, wherein a first shut-off valve (23) is arranged on the first air pressure pipe (21), and a second shut-off valve (24) is arranged on the second air pressure pipe (22).
9. The switching device of the outlet channel of the sealing fan according to claim 2, characterized in that the first cavity (11) and the second cavity (12) are respectively communicated with an auxiliary air source through a third duct (25) and a fourth duct (26).
10. The switching device of the outlet channel of the sealing fan according to claim 9, characterized in that a third shut-off valve (27) is arranged on the third pipeline (25) and a fourth shut-off valve (28) is arranged on the fourth pipeline (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011048086.7A CN112032359B (en) | 2020-09-29 | 2020-09-29 | Switching device for outlet channel of sealing fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011048086.7A CN112032359B (en) | 2020-09-29 | 2020-09-29 | Switching device for outlet channel of sealing fan |
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| Publication Number | Publication Date |
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| CN112032359A CN112032359A (en) | 2020-12-04 |
| CN112032359B true CN112032359B (en) | 2022-04-05 |
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| CN202011048086.7A Active CN112032359B (en) | 2020-09-29 | 2020-09-29 | Switching device for outlet channel of sealing fan |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112665884A (en) * | 2020-12-11 | 2021-04-16 | 华能国际电力股份有限公司海门电厂 | Online maintenance system for parallel operation fans |
| CN113235990A (en) * | 2021-04-29 | 2021-08-10 | 齐君三 | Vertical flue pipe and garage with same |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3607659A1 (en) * | 1985-04-03 | 1986-10-16 | Hoerbiger Ventilwerke Ag, Wien | DEVICE FOR REGULATING THE FLOW RATE OF COMPRESSORS |
| AU2744701A (en) * | 1999-12-29 | 2001-07-09 | Hill-Rom Services, Inc. | Hospital bed |
| CN1603619A (en) * | 2004-10-29 | 2005-04-06 | 黄翔翊 | Magnetic drive high sealed gas supercharging blower |
| CN2880849Y (en) * | 2005-12-26 | 2007-03-21 | 中冶京诚工程技术有限公司 | Self-cleaning device for pressure taking port of vaporization cooling flue of converter |
| CN202141308U (en) * | 2011-06-17 | 2012-02-08 | 常州先锋干燥设备有限公司 | Fluidizing/drying and solvent-recycling machine |
| US9482346B2 (en) * | 2013-09-13 | 2016-11-01 | Clark Equipment Company | System and method for controlling a compressor inlet valve |
| CN109159764B (en) * | 2018-08-22 | 2021-11-02 | 浙江信基科技有限公司 | Heavy truck window glass cleaning equipment |
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