CN109404595B - Automatic upper chain type smoke exhaust valve actuating mechanism - Google Patents
Automatic upper chain type smoke exhaust valve actuating mechanism Download PDFInfo
- Publication number
- CN109404595B CN109404595B CN201811606615.3A CN201811606615A CN109404595B CN 109404595 B CN109404595 B CN 109404595B CN 201811606615 A CN201811606615 A CN 201811606615A CN 109404595 B CN109404595 B CN 109404595B
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- Prior art keywords
- oil
- upper chain
- bottom plate
- driving wheel
- swinging
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- 230000007246 mechanism Effects 0.000 title claims abstract description 33
- 239000000779 smoke Substances 0.000 title claims abstract description 21
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 description 8
- 238000004804 winding Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 5
- 238000005461 lubrication Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
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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
- F16K31/44—Mechanical actuating means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention discloses an automatic upper chain type smoke exhaust valve actuating mechanism, which comprises a bottom plate and a main shaft for connecting a smoke exhaust valve plate, wherein the main shaft penetrates through the bottom plate and is fixed with a driving wheel, a main torsion spring for enabling the driving wheel to rotate positively is sleeved on the main shaft, a limiting notch is formed in the driving wheel, a swinging rod is rotatably arranged on the bottom plate through a swinging rod shaft, a swinging frame is rotatably arranged on the bottom plate through a swinging frame shaft, an electromagnet is further arranged on the bottom plate, a mandrel of the electromagnet is connected with the head end of the swinging rod, a bayonet for clamping the head end of the swinging frame is arranged at the tail end of the swinging rod, a convex column for clamping the limiting notch to stop the driving wheel from rotating positively is arranged on the swinging frame, and a reset tension spring for enabling the convex column of the swinging frame to approach the driving wheel is arranged between the swinging frame and the bottom plate; the driving wheel is provided with a plurality of upper chain notches, all the upper chain notches are positioned in a semicircular arc, the bottom plate is provided with an upper chain wheel driven by a motor, and the upper chain wheel is provided with an upper chain pin for engaging the upper chain notches to reversely reset and rotate the driving wheel. The mechanism can automatically reset the uplink.
Description
Technical Field
The invention relates to the field of safety engineering, in particular to an automatic upper chain type smoke exhaust valve executing mechanism.
Background
The valve plate of the smoke exhaust valve is arranged in the ventilating duct of the building, specifically, the valve plate is rotatably connected with the ventilating duct through a main shaft, and the upper end of the main shaft extends out of the ventilating duct to be connected with the executing mechanism. The actuating mechanism of the prior art comprises a bottom plate, a main shaft penetrates through the bottom plate and is fixed with a cam, a limiting notch is formed in the cam, a swing rod is rotatably arranged on the bottom plate through a swing rod shaft, a swing frame is rotatably arranged on the bottom plate through a swing frame shaft, an electromagnet is further arranged on the bottom plate, a mandrel of the electromagnet is connected with the head end of the swing rod, under normal conditions, the electromagnet is powered off, the mandrel of the electromagnet stretches out, a bayonet at the tail end of the swing rod is clamped with the head end of the swing frame, a convex column at the middle section of the swing frame is clamped into the limiting notch of the cam, a tension spring for enabling the swing frame to close to the cam is arranged between the swing frame and a shell, a main torsion spring for enabling the cam to positively rotate is sleeved on the main shaft, and the valve body is in a closed state.
When a fire occurs, the electromagnet is electrified, the mandrel retracts and pulls the head end of the swing rod, the tail end of the swing rod is lifted and separated from the swing frame, and the swing frame which loses the constraint of the swing rod cannot prevent the positive rotation of the cam because the force of the main torsion spring is larger than that of the reset tension spring, namely, the convex column of the swing frame is pushed out from the limit notch by the cam, and the positive rotation of the cam drives the rotation of the main shaft and the valve plate, so that the valve body opens the smoke exhaust.
The above prior art actuators have the following two drawbacks. Firstly, the mechanism cannot be reset automatically, and the mechanism must be reset manually after each action, so that the labor cost and the labor intensity are increased. Secondly, a plurality of relatively important nodes in the actuating mechanism, such as the joint of the tail end of the swing rod and the head end of the swing frame, the joint of the main shaft and the bottom plate, the joint of the swing rod and the swing rod shaft and the like, are likely to rust and be blocked after long-term operation, so that the mechanism cannot normally act and cannot timely open a smoke exhaust valve and other bad conditions occur.
Disclosure of Invention
The invention aims to solve the technical problem of providing an automatic chained smoke exhaust valve executing mechanism capable of automatically resetting a chained smoke exhaust valve.
The technical scheme of the invention is that the automatic chained smoke exhaust valve actuating mechanism comprises a bottom plate and a main shaft used for connecting a smoke exhaust valve plate, wherein the main shaft penetrates through the bottom plate and is fixed with a driving wheel, a main torsion spring used for enabling the driving wheel to rotate positively is sleeved on the main shaft, a limiting notch is arranged on the driving wheel, the bottom plate is rotatably provided with a swinging rod through a swinging rod shaft, the bottom plate is rotatably provided with a swinging frame through a swinging frame shaft, the bottom plate is also provided with an electromagnet, the core shaft of the electromagnet is connected with the head end of the swinging rod, the tail end of the swinging rod is provided with a bayonet used for clamping the head end of the swinging frame, the swinging frame is provided with a convex column used for clamping the limiting notch to stop the driving wheel from rotating positively, and a reset tension spring used for enabling the convex column of the swinging frame to be close to the driving wheel is arranged between the swinging frame and the bottom plate; the driving wheel is provided with a plurality of upper chain notches, all the upper chain notches are positioned in a semicircular arc, the bottom plate is provided with an upper chain wheel driven by a motor, and the upper chain wheel is provided with an upper chain pin for engaging the upper chain notches to reversely reset and rotate the driving wheel.
Compared with the prior art, the automatic upper chain type smoke exhaust valve executing mechanism with the structure has the following advantages.
When a fire occurs, the electromagnetic valve is electrified, the mandrel contracts, the head end of the swing rod is pulled down to lift the tail end of the swing rod, the bayonet of the swing rod is separated from the head end of the swing frame, and the force of the main torsion spring is larger than that of the reset tension spring, so that the swing frame and the convex column which lose the clamping constraint of the swing rod can not prevent the driving wheel any more, and the driving wheel pushes the convex column out of the limiting pit and rotates positively under the action of the main torsion spring, so that the main shaft is driven to rotate the valve plate, and the valve body is opened; after the fire is over, the motor drives the upper chain wheel to rotate, the upper chain pins on the upper chain wheel are clamped into the corresponding upper chain notches one by one, the driving wheel is driven to reversely rotate, when the limit notch of the driving wheel reversely rotates to be opposite to the swing frame convex column, the convex column is clamped into the limit notch again under the action of the reset torsion spring, and when the convex column and the swing frame are reset, the head end of the swing rod is ejected out by the powered-off mandrel, so that the tail end of the swing rod just clamps the head end of the swing frame again.
According to the analysis of the dynamic process, the structure completely realizes full-automatic reset uplink, completely replaces the effect of manual uplink reset, reduces labor intensity, saves labor cost, and is more convenient and reliable.
Preferably, the bottom plate is provided with a limit stop pin, the driving wheel is provided with an arc-shaped through hole concentric with the main shaft, and the limit stop pin is inserted into the arc-shaped through hole; the structure essentially adds double limiting for the driving wheel, limits the initial position and the final position of the driving wheel and the main shaft, and further controls the swing angle of the valve plate, so that the valve plate is limited in two states of being completely opened and completely closed.
Preferably, the actuating mechanism is further provided with an oiling system, the oiling system comprises an external oil storage tank, an oiling device, a multi-way valve and a plurality of oil nozzles, the oiling device is stressed by the swing rod, the oil is discharged when the swing rod stretches, the oiling device absorbs oil, the oil storage tank is connected with an inlet of the oiling device through an oil suction pipe, an outlet of the oiling device is connected with an inlet of the multi-way valve through a main oil discharge pipe, and each outlet of the multi-way valve is connected with the oil nozzles through a branch oil discharge pipe. Therefore, when the actuating mechanism acts, the swing rod can also act necessarily, the tail end of the swing rod can press the oiling device, so that the oiling device can synchronously oil a plurality of nodes which are rusted and blocked in the actuating mechanism through the multi-way valve and each oil outlet nozzle, a plurality of important nodes in the actuating mechanism can be fully lubricated, the nodes are prevented from being blocked, and the actuating mechanism is fast in action, sensitive in response, smooth and stable in valve body opening and closing process and good in working stability; moreover, the oiling process does not need manual oiling operation on each node one by one, but utilizes an oiling system to automatically trigger and finish oiling of each node at one time, so that the workload and the labor intensity are greatly reduced, the labor cost is saved, and the time and the labor are saved; when the actuating mechanism is reset, the swing rod is retracted, and the oil in the oil storage tank is automatically absorbed into the oil injection device by the aid of the stretching oil injection device, and the resetting process is fully automatic and completely free of manual operation, namely, the whole process from oil absorption to oil injection does not need to consume manpower, and a worker only needs to pour enough oil into the oil storage tank when the actuating mechanism is initially installed, so that the long-term oil injection and lubrication requirements of the mechanism are met, namely, frequent oil supplement is not needed, and the labor intensity and labor cost are further reduced; moreover, according to the safety regulations, even if no fire occurs, in order to ensure safety, the mechanism is prevented from aging, the actuating mechanism must be operated once every a period of time, such as 3 months, so that the swing rod must be operated once every a period of time, the oil injection device also automatically sucks oil from the oil storage tank and injects oil to the key parts of the actuating mechanism once along with the test operation, that is, the oil suction and oil injection processes do not separately increase operation steps, that is, the workload and burden of workers are not additionally increased, and the oil suction and oil injection processes are integrated in the existing and necessary test operation processes and are automatically completed by the mechanism, so that reasonable lubrication is synchronously realized.
As still preferable, the multi-way valve is a four-way valve, the four-way valve is connected with three oil outlet nozzles, the first oil outlet nozzle is aligned with the joint of the tail end of the swing rod and the head end of the swing frame, the second oil outlet nozzle is aligned with the joint of the main shaft and the bottom plate, and the third oil outlet nozzle is aligned with the joint of the swing rod and the swing rod shaft; according to the scheme, the parts which are likely to rust inside the execution mechanism are screened out to be pertinently lubricated, the oiling system is automatically completed at one time, and compared with manual oiling of three nodes one by one, the oiling efficiency is obviously higher.
As further preferable, a cylindrical oil storage cavity is arranged in the shell of the oiling device, a plunger is slidably matched in the oil storage cavity, the outer end of the plunger extends out of the oil storage cavity, a connector for connecting the tail end of the swing rod is arranged at the outer end of the plunger, an inlet of the oil storage cavity is provided with a first check valve in the inlet direction, each oil outlet nozzle is provided with a second check valve in the outlet direction, and an oil immersion sponge block is further fixed on the oil outlet nozzle; the sponge block is arranged on the oil nozzle, so that the oil can uniformly infiltrate the key part of the actuating mechanism, and the lubrication effect is more ideal; the swing rod pushes up the plunger through the connector, so that the oil storage cavity is compressed, oil flows to each oil outlet nozzle through the multi-way valve, and lubrication is realized; the swing rod pulls down the plunger through the connector, and further stretches and enlarges the oil storage cavity, so that oil in the oil storage cavity enters the oil storage cavity through the first one-way valve for the next lubrication; the structure is exquisite and reasonable in design and stable and reliable in action; moreover, the outlet check valve is arranged on the oil outlet nozzle and is not arranged in the shell of the oiling device, so that the advantages are that after oil is absorbed from the oil storage tank, the oil is stored in the oil storage cavity, each oil drain pipe and each oil outlet nozzle, the space for temporary oil storage and the oil storage capacity are increased, and the oiling device is pressed, the oil injection pressure is higher, and the oiling effect is more ideal.
Drawings
Fig. 1 is a schematic top view of the automatic up-link type smoke exhaust valve actuator of the present invention in a valve opening state.
Fig. 2 is a schematic top view of the automatic up-link type smoke exhaust valve actuator of the present invention when the valve is closed.
Fig. 3 is an enlarged schematic view of the oiling system of the automatic up-chain type smoke exhaust valve actuator of the present invention.
In the drawing, 1, a bottom plate, 2, a main shaft, 3, a driving wheel, 4, a main torsion spring, 5, a limit notch, 6, a swing rod shaft, 7, a swing rod, 8, a swing frame shaft, 9, a swing frame, 10, an electromagnet, 11, a bayonet, 12, a convex column, 13, a reset tension spring, 14, a winding notch, 15, a winding wheel, 16, a winding pin, 17, a limit stop pin, 18, an arc through hole, 19, an oil storage tank, 20, an oiling device, 21, an oil outlet nozzle, 22, an oil suction pipe, 23, a main oil suction pipe, 24, a branch oil suction pipe, 25, a four-way valve, 26, an oil storage cavity, 27, a plunger, 28, a connector, 29, a first one-way valve, 30, a second one-way valve, 31, a sponge block, 32, a reset compression spring, 33, a micro switch, 34 and a tensioning compression spring are shown.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
As shown in fig. 1, 2 and 3, the automatic upper chain type smoke exhaust valve actuating mechanism of the invention comprises a bottom plate 1 and a main shaft 2 used for connecting a smoke exhaust valve plate, wherein the main shaft 2 penetrates through the bottom plate 1 and is in rotatable fit with the bottom plate 1, and a driving wheel 3 is fixed on the part, extending out of the bottom plate 1, of the upper part of the main shaft 2. The main shaft 2 is sleeved with a main torsion spring 4 for enabling the driving wheel 3 to keep forward rotation trend, two ends of the main torsion spring 4 are respectively fixed with the main shaft 2 and the bottom plate 1, and a limiting notch 5 is formed in the driving wheel 3. The bottom plate 1 is rotatably provided with the swing rod 7 through the swing rod shaft 6, the bottom plate 1 is rotatably provided with the swing frame 9 through the swing frame shaft 8, the bottom plate 1 is also provided with the electromagnet 10, a mandrel of the electromagnet 10 is connected with the head end of the swing rod 7, the mandrel is sleeved with the reset pressure spring 32, and two ends of the reset pressure spring 32 are abutted against the shell of the electromagnet 10 and the head end of the swing rod 7. The tail end of the swing rod 7 is provided with a bayonet 11 for clamping the head end of the swing frame 9, the swing frame 9 is provided with a convex column 12 for clamping the limit notch 5 to stop the driving wheel 3 from rotating forwards, and a reset tension spring 13 for enabling the convex column 12 of the swing frame 9 to be close to the driving wheel 3 is arranged between the swing frame 9 and the bottom plate 1; the two ends of the reset tension spring 13 are respectively fixed with the head end of the swing frame 9 and the bottom plate 1.
The driving wheel 3 is provided with a plurality of winding notches 14, and in this embodiment, 3 winding notches 14. All of the winding gaps 14 are located within a half arc, in other words, the circumferential span of the three winding gaps 14 is no more than pi, in this embodiment, the three winding gaps 14 have a pi/2 arc. The base plate 1 is provided with an upper sprocket 15 driven by an electric motor which is also mounted on the base plate 1, the upper sprocket 15 being fixed to the output shaft of the electric motor. The upper sprocket 15 is provided with an upper chain pin 16 for engaging the upper chain notch 14 to reversely reset and rotate the drive pulley 3. The upper chain pins 16 are also three and correspond one-to-one with the upper chain notches 14.
The bottom plate 1 is also provided with a micro switch 33 for sensing the upward tilting of the swing frame 9, and the micro switch 33, the motor and the electromagnet 10 are all connected with a main controller of the actuating mechanism, such as a PLC chip. When the swing frame 9 is separated from the swing rod 7 and is sensed by the micro switch 33, the main controller cuts off the power of the electromagnet 10, so that the tail end of the swing rod 7 is pressed down, and the whole reset of the actuating mechanism is facilitated.
The bottom plate 1 is provided with a limiting stop pin 17, the driving wheel 3 is provided with an arc-shaped through hole 18 concentric with the main shaft 2, and the limiting stop pin 17 is inserted into the arc-shaped through hole 18.
The actuating mechanism is also provided with an oiling system, the oiling system comprises an external oil storage tank 19, an oiling device 20, a multi-way valve and a plurality of oil outlet nozzles 21, wherein the oiling device 20 is stressed by the swing rod 7, the oil outlet is stretched by the swing rod 7, the oil is absorbed, the oil storage tank 19 is connected with an inlet of the oiling device 20 through an oil absorption pipe 22, an outlet of the oiling device 20 is connected with an inlet of the multi-way valve through a main oil exhaust pipe 23, the multi-way valve in the embodiment is a four-way valve 25, and three outlets of the four-way valve 25 are respectively connected with the three oil outlet nozzles 21 through three branch oil exhaust pipes 24. The first oil outlet nozzle 21 is aligned with the joint of the tail end of the swing rod 7 and the head end of the swing frame 9, the second oil outlet nozzle 21 is aligned with the joint of the main shaft 2 and the bottom plate 1, and the third oil outlet nozzle 21 is aligned with the joint of the swing rod 7 and the swing rod shaft 6.
The shell of the oiling device 20 is also arranged on the bottom plate 1, a cylindrical oil storage cavity 26 is arranged in the shell of the oiling device 20, a plunger 27 is slidably matched in the oil storage cavity 26, the outer end of the plunger 27 extends out of the oil storage cavity 26, a connector 28 for connecting the tail end of the swing rod 7 is arranged at the outer end of the plunger 27, a tensioning pressure spring 34 is sleeved on the portion, extending out of the oil storage cavity 26, of the plunger 27, and two ends of the tensioning pressure spring 34 are respectively abutted against the connector 28 and the end portion of the shell of the oiling device 20.
The inlet of the oil storage cavity 26 is provided with a first check valve 29 which can not only enter and exit, each oil outlet nozzle 21 is provided with a second check valve 30 which can not only enter and exit, and the oil outlet nozzle 21 is also fixedly provided with an oil immersion sponge block 31.
Claims (2)
1. An automatic chained smoke exhaust valve actuating mechanism comprises a bottom plate (1) and a main shaft (2) for connecting a smoke exhaust valve plate, wherein the main shaft (2) penetrates through the bottom plate (1) and is fixed with a driving wheel (3), a main torsion spring (4) for enabling the driving wheel (3) to rotate positively is sleeved on the main shaft (2), a limit notch (5) is arranged on the driving wheel (3), a swinging rod (7) is rotatably arranged on the bottom plate (1) through a swinging rod shaft (6), a swinging frame (9) is rotatably arranged on the bottom plate (1) through a swinging frame shaft (8), an electromagnet (10) is further arranged on the bottom plate (1), a mandrel of the electromagnet (10) is connected with the head end of the swinging rod (7), a bayonet (11) for clamping the head end of the swinging frame (9) is arranged at the tail end of the swinging rod (7), a convex column (12) for clamping the limit notch (5) to stop the driving wheel (3) from rotating positively is arranged on the swinging frame (9), and a tension spring (13) for enabling the convex column (12) of the swinging frame (9) to approach the driving wheel (3) is arranged between the swinging frame (9) and the bottom plate (1); the method is characterized in that: a plurality of upper chain notches (14) are arranged on the driving wheel (3), all the upper chain notches (14) are positioned in a semicircular arc, the radian of the three upper chain notches (14) is pi/2, an upper chain wheel (15) driven by a motor is arranged on the bottom plate (1), upper chain pins (16) used for engaging the upper chain notches (14) to reversely reset and rotate the driving wheel (3) are arranged on the upper chain wheel (15), and the upper chain pins (16) are three and correspond to the upper chain notches (14) one by one; the motor drives the upper chain wheel (15) to rotate, and upper chain pins on the upper chain wheel (15) are clamped into corresponding upper chain notches (14) one by one;
a limiting stop pin (17) is arranged on the bottom plate (1), an arc-shaped through hole (18) concentric with the main shaft (2) is arranged on the driving wheel (3), and the limiting stop pin (17) is inserted into the arc-shaped through hole (18);
the oil injection system is further provided with an oil injection system, the oil injection system comprises an external oil storage tank (19), an oil injection device (20) for sucking oil when the oil is pressed by the swing rod (7) and is stretched by the swing rod (7), a multi-way valve and a plurality of oil outlet nozzles (21), the oil storage tank (19) is connected with an inlet of the oil injection device (20) through an oil suction pipe (22), an outlet of the oil injection device (20) is connected with an inlet of the multi-way valve through a main oil discharge pipe (23), and each outlet of the multi-way valve is connected with the oil outlet nozzle (21) through a branch oil discharge pipe (24);
the multi-way valve is a four-way valve (25), the four-way valve (25) is connected with three oil outlet nozzles (21), the first oil outlet nozzle (21) is aligned with the joint of the tail end of the swing rod (7) and the head end of the swing frame (9), the second oil outlet nozzle (21) is aligned with the joint of the main shaft (2) and the bottom plate (1), and the third oil outlet nozzle (21) is aligned with the joint of the swing rod (7) and the swing rod shaft (6).
2. The automatic up-chain smoke evacuation valve actuator of claim 1, wherein: be equipped with tube-shape oil storage chamber (26) in the shell of oiling device (20), interior sliding fit in oil storage chamber (26) has plunger (27), and plunger (27) outer end stretches out oil storage chamber (26) and plunger (27) outer end is equipped with connector (28) that are used for connecting pendulum rod (7) tail end, and oil storage chamber (26) entry is equipped with first check valve (29) of advancing to, and every glib talker (21) are equipped with out to second check valve (30), still are fixed with on glib talker (21) and soak oily sponge piece (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811606615.3A CN109404595B (en) | 2018-12-27 | 2018-12-27 | Automatic upper chain type smoke exhaust valve actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811606615.3A CN109404595B (en) | 2018-12-27 | 2018-12-27 | Automatic upper chain type smoke exhaust valve actuating mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109404595A CN109404595A (en) | 2019-03-01 |
| CN109404595B true CN109404595B (en) | 2024-01-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811606615.3A Active CN109404595B (en) | 2018-12-27 | 2018-12-27 | Automatic upper chain type smoke exhaust valve actuating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109404595B (en) |
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