CN209084134U - A kind of explosion-proof type vent cabinet air-valve transmission mechanism - Google Patents
A kind of explosion-proof type vent cabinet air-valve transmission mechanism Download PDFInfo
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- CN209084134U CN209084134U CN201821787988.0U CN201821787988U CN209084134U CN 209084134 U CN209084134 U CN 209084134U CN 201821787988 U CN201821787988 U CN 201821787988U CN 209084134 U CN209084134 U CN 209084134U
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Abstract
A kind of explosion-proof type vent cabinet air-valve transmission mechanism, including transmission mechanism, the form being connect by conveyer belt with transmission mechanism and the air-valve being connect with transmission mechanism, the transmission mechanism includes two spaced fixed plates, transmission shaft A is provided with by bearing between the fixing plates, transmission shaft B and transmission shaft C, the transmission shaft A passes through fixed plate and is connect by conveyer belt with form shaft, belt pulley is provided on the transmission shaft A and transmission shaft B, it is connected between two belt pulleys by driving belt, described one end transmission shaft C passes through fixed plate and connect with the blade rotor on air valve blades, the self-locking mechanism of transmission and self-locking function has been provided on the transmission shaft B and transmission shaft C, the transmission mechanism is ingenious in design, realize the miniaturization of transmission mechanism, be easy for installation and maintenance disassembly, implementation mechanism from Lock function improves service life simultaneously, has buffering protection function.
Description
Technical field
The utility model relates to laboratory hood technical fields, are specifically exactly a kind of explosion-proof type vent cabinet air-valve biography
Motivation structure realizes the Linear Control of vent cabinet ventilation quantity, has the function of self-lock protection.
Background technique
Vent cabinet is an indispensable component part in laboratory ventilation design, in order to make laboratory worker not
Suck or swallow some chemical substances and organism toxic, can causing a disease or toxicity is unknown, should have in laboratory it is good
Ventilation, for the absorption for preventing some steams, gas and particle (smog, coal smoke, dust and aerosol), polluter must use ventilation
Cabinet, ventilator cowling or the method for local ventilation remove.
Currently, the vent cabinet that uses of present laboratory internal is to realize the Linear Control of vent cabinet ventilation quantity, generally
It is the high sensor of installation door on vent cabinet by installing actuator on air-valve, while air quantity sensing is installed inside ventilation shaft
Device, three act on the balanced Linear Control of the entire laboratory internal vent cabinet ventilation quantity of ability, the control of existing vent cabinet simultaneously
System there is a problem of controlling component complexity, while above-mentioned component needs Electronic control in control process, cannot reach logical
The explosion-proof purpose of wind cabinet proposes the scheme of solution in 107838163 A of patent CN, there is problems, on form
When lower mobile drive air-valve open and close, after arrival air-valve is either fully open or fully closed, air-valve can not achieve locking, wind-force
Or under the minute movement of form, air-valve can generate small rotation, influence the ventilation quantity of air-valve, and form is moving up and down
To after the positioning of minimum or high limit position, it cannot be guaranteed that the air valve blades of connection realize positioning completely, that is, can generate
The small transformation of position, at the same form drive air valve blades rotation without protection buffer structure, for a long time using will affect use
Service life, it may appear that repair the higher cost of replacement, the problems such as installation is inconvenient, and structure is larger.
Summary of the invention
The purpose of this utility model is to provide a kind of explosion-proof type vent cabinet air-valve transmission mechanism, transmission mechanism design is skilful
It is wonderful, realize the miniaturization of transmission mechanism, be easy for installation and maintenance disassembly, the self-locking function of implementation mechanism, while improving using the longevity
Life has buffering protection function.
The technical solution adopted by the utility model to solve its technical problems is that: a kind of explosion-proof type vent cabinet air-valve driver
Structure, including transmission mechanism 5, the form being connect by conveyer belt 4 with transmission mechanism 52 and the air-valve 6 being connect with transmission mechanism 5,
The transmission mechanism 5 includes two spaced fixed plates 9, and bearing is provided with transmission shaft between fixed plate 9
A10, transmission shaft B11 and transmission shaft C12, the transmission shaft A10 pass through fixed plate 9 and are connected by conveyer belt 4 and form shaft 3
It connects, belt pulley 14 is provided on the transmission shaft A10 and transmission shaft B11, passes through driving belt between two belt pulleys 14
13 connections, described one end transmission shaft C12 passes through fixed plate 9 and connect with the blade rotor 8 on air valve blades 7, in the biography
The self-locking mechanism of transmission and self-locking function is provided on moving axis B11 and transmission shaft C12, the self-locking mechanism includes that setting exists
Runner A15 on transmission shaft B11, the runner B16 being arranged on transmission shaft C12 and transmission shaft is co-axially located at runner A15
Pivoted arm 17 on B11 is provided with guiding axis 18 in the outboard end of the pivoted arm 17, is provided on the runner B16 along diameter
To the guide groove 19 in direction, the guiding axis 18 is mounted on 19 inside of guide groove and can slide along guide groove 19.
As optimization, it is provided with the fixed link positioned at quadrangle between the fixed plate, leads between fixed plate and fixed plate
Screw connection is crossed, the side of fixed plate is fixedly connected with vent cabinet main body upper end.
As optimization, the pivoted arm 17 and runner A15 are coaxially mounted on transmission shaft B11, and the pivoted arm 17 is length
Strip structure, the length of pivoted arm 17 are greater than the radius of runner A15.
As optimization, arc-shaped slot A20 is provided on the runner A15, the pivoted arm 17 is arranged in arc-shaped slot A20
Middle position, arc-shaped slot A20 is symmetrically distributed along pivoted arm 17.
As optimization, opened on the runner B16 there are two the identical arc-shaped slot B21 of radius, the arc-shaped slot
B21 is symmetrically distributed along guide groove 19, and the guide groove 19 is arranged along the radius of runner B16, and runner B16
The center of circle is on the center line of the length direction of guide groove 19.
As optimization, the distance between the transmission shaft B11 and transmission shaft C12 are less than runner A15 and runner B16 radius
The sum of.
As optimization, the radius of the arc-shaped slot B21 is equal with the radius size of runner A15.
As optimization, the radius of the arc-shaped slot A20 is equal with the radius size of runner B16.
As optimization, by flanged joint, the setting of blade rotor 8 exists for the transmission shaft C12 and blade rotor 8
On the rotation centerline of air valve blades 7.
As optimization, the guide groove 19 is to be arranged outward along the radial direction of runner B16, and guide groove 19
Outside is open-minded, and the guiding axis 18 can be slided along guide groove 19, and can completely disengage out guide groove 19.
The beneficial effects of the utility model are: compared with prior art, a kind of explosion-proof type vent cabinet wind of the utility model
Valve driving mechanism, miniaturized structure are easily installed, and realize that form moves up and down the open and close for being converted into air valve blades, simultaneously
Air-valve is realized by self-locking mechanism to completely close or self-locking function when fully open state, is effectively prevented complete in air-valve
The air valve blades as caused by under the action of wind-force in air-valve rotate when full opening or completely closed state, while effective control
The rotation beginning and end for having made air valve blades avoids air-valve rotation excessive, causes to damage the extruding of air valve blades, mention
High service life, avoids rotation excessive, also avoids air-valve since wind speed increases, transmission mechanism is driven to cause form mobile,
It is mobile to prevent air-valve Reverse Turning Control form, and the design is easy for assemble or unload.
Detailed description of the invention
Fig. 1 is utility model works state diagram one；
Fig. 2 is utility model works state diagram two；
Fig. 3 is the utility model transmission mechanism internal structure enlarged drawing；
Fig. 4 is the utility model transmission mechanism main view；
Transmission mechanism internal structure enlarged drawing when Fig. 5 is the utility model air-valve opening state；
Transmission mechanism internal structure enlarged drawing when Fig. 6 is the utility model air-valve closed state；
Fig. 7 is the utility model transmission mechanism self-locking state enlarged drawing；
Wherein, 1 vent cabinet, 2 forms, 3 form shafts, 4 conveyer belts, 5 transmission mechanisms, 6 air-valves, 7 air valve blades, 8 blades
Shaft, 9 fixed plates, 10 transmission shaft A, 11 transmission shaft B, 12 transmission shaft C, 13 driving belts, 14 belt pulleys, 15 runner A, 16 runners
B, 17 pivoted arms, 18 guiding axis, 19 guide grooves, 20 arc-shaped slot A, 21 arc-shaped slot B.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.Therefore, below to attached
The detailed description of the embodiments of the present invention provided in figure is not intended to limit the range of claimed invention,
But it is merely representative of the selected embodiment of the utility model.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without creative efforts, belongs to the model of the utility model protection
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, or
The invention product using when the orientation or positional relationship usually put, be merely for convenience of description the utility model and simplification retouched
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it should not be understood as limiting the present invention.It is retouched in addition, term " first ", " second ", " third " etc. are only used for distinguishing
It states, is not understood to indicate or imply relative importance.
A kind of explosion-proof type vent cabinet air-valve transmission mechanism, including transmission mechanism 5, connect with transmission mechanism 5 by conveyer belt 4
Form 2 and the air-valve 6 that is connect with transmission mechanism 5, the transmission mechanism 5 include two spaced fixed plates 9,
Transmission shaft A10, transmission shaft B11 are provided with by bearing between fixed plate 9 and transmission shaft C12, the transmission shaft A10 pass through solid
Fixed board 9 is connect by conveyer belt 4 with form shaft 3, is provided with belt pulley 14 on the transmission shaft A10 and transmission shaft B11,
It is connected between two belt pulleys 14 by driving belt 13, described one end transmission shaft C12 passes through fixed plate 9 and air valve blades 7
On blade rotor 8 connect, be provided on the transmission shaft B11 and transmission shaft C12 be driven and self-locking function it is self-locking
Mechanism, the self-locking mechanism include the runner A15 being arranged on transmission shaft B11, the runner B16 being arranged on transmission shaft C12
And it is co-axially located at the pivoted arm 17 on transmission shaft B11 with runner A15, the outboard end of the pivoted arm 17 is provided with guiding axis
18, guide groove 19 radially is provided on the runner B16, the guiding axis 18 is mounted on inside guide groove 19
And it can be slided along guide groove 19.
In Fig. 1 and embodiment shown in Fig. 2, the form of vent cabinet front end can be under the manual operation of experimenter on
Lower movement is provided with the belt of vertical distribution in the rear side end positions of form, while being provided in the apical position of vent cabinet
Form shaft, form shaft are engaged with the belt on form, and form moves up and down the rotation for driving form shaft, in form shaft
Transmission is realized by transmission band connection between transmission mechanism, the blade rotor connection on the other end and air-valve of transmission mechanism,
Air valve blades are installed on blade rotor, the open and close of air valve blades, entire driver are driven by the rotation of blade rotor
Structure is fixedly mounted on the apical position of vent cabinet main body, and the fixation of the fixed plate of transmission mechanism is realized by fixing bolt, thus
It realizes the fixation of transmission mechanism, and dismantles easy for installation.
In the embodiment shown in fig. 3, transmission mechanism is arranged between two fixed plates, and be arranged in three it is different
On transmission shaft, three transmission shafts, the two sides of transmission shaft pass through bearing and are mounted in the fixed plate of two sides, transmission shaft A and transmission
It is connected between axis B by driving belt, runner A and pivoted arm is also equipped on transmission shaft B, runner A and pivoted arm pass through transmission shaft B
Rotation rotate simultaneously, be fixedly connected between runner A and pivoted arm, arc-shaped slot A, the circular arc of arc-shaped slot A be provided on runner A
Center line is overlapped with the length direction center line of pivoted arm, is provided with guiding axis on one end towards outside of pivoted arm, is being driven
The guide groove being arranged radially is provided on the runner B installed on axis C, guiding axis can pass through guiding axis in guide groove internal slide
It is rotated along the transmission shaft B axle heart, guiding axis can be along guide groove internal slide, and sliding while will drive runner B along transmission
The axle center of axis C rotates, to realize the ability transmission between transmission shaft B and transmission shaft C.
In Fig. 4, there are two the identical arc-shaped slot B of shape, the diameters and runner A of arc-shaped slot B for setting on runner B
Diameter it is equal, runner A can rotate in the circular arc of arc-shaped slot B with the rotation of runner B under state at this time, this
When runner B rotated under the drive of guiding axis, while runner A and runner B rotate simultaneously, realize the transmission of rotation.
It is the driver composition of air-valve opening state when runner A and runner B rotate to state at this time in Fig. 5, this
When transmission shaft A rotated counterclockwise under conveyer belt drive, while runner A also rotates counterclockwise under the drive of driving belt, turns
The pivoted arm of wheel A coaxial arrangement also rotates counterclockwise, the guiding axis of pivoted arm front end along guide groove to moving on the outside of guide groove, together
When drive runner B rotated clockwise along transmission shaft C, runner B rotation drive blade rotor rotate clockwise, realize air-valve open
It opens.
It is the driver composition of air-valve closed state when runner A and runner B rotate to state at this time in Fig. 6, this
When transmission shaft A rotated clockwise under conveyer belt drive, while runner A is also rotated clockwise under the drive of driving belt, is turned
The pivoted arm of wheel A coaxial arrangement also rotates clockwise, the guiding axis of pivoted arm front end along guide groove to moving on the outside of guide groove, together
When drive runner B rotated counterclockwise along transmission shaft C, runner B rotation drive blade rotor rotate counterclockwise, realize air-valve close
It closes.
In Fig. 7, when runner A and runner B rotate to state at this time, the driver of greatest limit state is opened for air-valve
Composition, transmission shaft A rotates counterclockwise under conveyer belt drive at this time, while runner A is also counterclockwise under the drive of driving belt
The pivoted arm of rotation, runner A coaxial arrangement also rotates counterclockwise, and the guiding axis of pivoted arm front end is along guide groove to the outside of guide groove
It is mobile, while runner B being driven to rotate clockwise along transmission shaft C, runner B rotation drives blade rotor to rotate clockwise, and realizes
Air-valve is opened, and when form is moved upwards up to maximum position, pivoted arm at this time also rotates counterclockwise to maximum extreme position, this
When pivoted arm on guiding axis have been detached from out the guide groove on runner B, runner A can also rotate at this time, but runner B is completely disengaged
Guide groove, loses the drive of guiding axis, therefore runner B does not rotate at this time, while transmission shaft C also stops rotating, however passes
The distance between moving axis B and transmission shaft C are less than the sum of runner A15 and runner B16 radius, at this time the circle on runner location A runner B
Part inside arc groove B can cause to squeeze to runner A, cause runner A that cannot be further continued for rotating counterclockwise, form turn at this time
The locking between A and runner B is taken turns, the locking of entire transmission mechanism is realized, ensure that air valve blades do not continue to rotate, at this time
Air valve blades rotate to maximum state, and air-valve fully opens, and ventilation quantity is maximum.
Same principle is when pivoted arm rotates to the position such as the leftmost side in Fig. 7, that is, after rotating clockwise 90 degree,
An extreme position has been rotated to again, and air-valve is located at completely closed state at this time, at this time between transmission shaft B and transmission shaft C
Distance is less than the sum of runner A15 and runner B16 radius, at this time the part meeting inside the arc-shaped slot B on runner location A runner B
Runner A is caused to squeeze, causes runner A that cannot be further continued for rotating clockwise, forms the lock between runner A and runner B at this time
Tightly, the locking for realizing entire transmission mechanism ensure that air valve blades do not continue to rotate, and air-valve is in and completely closes shape at this time
State, and formed self-locking, when ventilation quantity changes in air-valve, it not will drive transmission mechanism and cause form mobile.
As optimization, it is provided with the fixed link positioned at quadrangle between the fixed plate, leads between fixed plate and fixed plate
Screw connection is crossed, the side of fixed plate is fixedly connected with vent cabinet main body upper end.
As optimization, the pivoted arm 17 and runner A15 are coaxially mounted on transmission shaft B11, and the pivoted arm 17 is length
Strip structure, the length of pivoted arm 17 are greater than the radius of runner A15.
As optimization, arc-shaped slot A20 is provided on the runner A15, the pivoted arm 17 is arranged in arc-shaped slot A20
Middle position, arc-shaped slot A20 is symmetrically distributed along pivoted arm 17.
As optimization, opened on the runner B16 there are two the identical arc-shaped slot B21 of radius, the arc-shaped slot
B21 is symmetrically distributed along guide groove 19, and the guide groove 19 is arranged along the radius of runner B16, and runner B16
The center of circle is on the center line of the length direction of guide groove 19.
As optimization, the distance between the transmission shaft B11 and transmission shaft C12 are less than runner A15 and runner B16 radius
The sum of.
As optimization, the radius of the arc-shaped slot B21 is equal with the radius size of runner A15.
As optimization, the radius of the arc-shaped slot A20 is equal with the radius size of runner B16.
As optimization, by flanged joint, the setting of blade rotor 8 exists for the transmission shaft C12 and blade rotor 8
On the rotation centerline of air valve blades 7.
As optimization, the guide groove 19 is to be arranged outward along the radial direction of runner B16, and guide groove 19
Outside is open-minded, and the guiding axis 18 can be slided along guide groove 19, and completely disengage out guide groove 19.
A kind of explosion-proof type vent cabinet air-valve transmission mechanism of the utility model, miniaturized structure are easily installed, and realize form
It moves up and down the open and close for being converted into air valve blades, while air-valve is realized by self-locking mechanism and completely closes or opens completely
Self-locking function when state is opened, effectively prevents fully opening in air-valve or when completely closed state due to the work of air-valve wind-force
The rotation of the air valve blades caused by lower, while it being effectively controlled the rotation beginning and end of air valve blades, avoid air-valve from rotating
It is excessive, cause to damage the extruding of air valve blades, improve service life, avoid rotation excessive, also avoid air-valve by
Increase in wind speed, transmission mechanism is driven to cause form mobile, prevent air-valve Reverse Turning Control form mobile, and the design installation is torn open
It unloads conveniently.
Above-mentioned specific embodiment is only the specific case of the utility model, and the scope of patent protection of the utility model includes
But it is not limited to the product form and style of above-mentioned specific embodiment, it is any to meet the utility model and any technical field
Those of ordinary skill's appropriate changes or modifications that it is done, should all fall into the scope of patent protection of the utility model.
Claims (10)
1. a kind of explosion-proof type vent cabinet air-valve transmission mechanism, including transmission mechanism (5), pass through conveyer belt (4) and transmission mechanism (5)
The form (2) of connection and the air-valve (6) being connect with transmission mechanism (5), it is characterised in that: the transmission mechanism (5) includes
Two spaced fixed plates (9), are provided with transmission shaft A(10 by bearing between fixed plate (9)), transmission shaft B(11)
It passes through fixed plate (9) with transmission shaft C(12), the transmission shaft A(10) to connect by conveyer belt (4) with form shaft (3), institute
The transmission shaft A(10 stated) and transmission shaft B(11) on be provided with belt pulley (14), between two belt pulleys (14) by transmission skin
Band (13) connects, the transmission shaft C(12) blade rotor (8) of the one end on fixed plate (9) and air valve blades (7) is even
Connect, in the transmission shaft B(11) with transmission shaft C(12) on be provided be driven and self-locking function self-locking mechanism, it is described
Self-locking mechanism includes being arranged in the runner A(15 on transmission shaft B(11)), runner B(16 on transmission shaft C(12) is set) and
Be co-axially located at transmission shaft B(11 with runner A(15)) on pivoted arm (17), be provided with and lead in the outboard end of the pivoted arm (17)
To axis (18), in the runner B(16) on be provided with guide groove (19) radially, the guiding axis (18) is mounted on
Guide groove (19) is internal and can slide along guide groove (19).
2. a kind of explosion-proof type vent cabinet air-valve transmission mechanism according to claim 1, it is characterised in that: the fixed plate
Between be provided with fixed link positioned at quadrangle, be connected by screw between fixed plate and fixed plate, the side of fixed plate and ventilation
Cabinet main body upper end is fixedly connected.
3. a kind of explosion-proof type vent cabinet air-valve transmission mechanism according to claim 1, it is characterised in that: the pivoted arm
(17) transmission shaft B(11 is coaxially mounted to runner A(15)) on, the pivoted arm (17) is string configuration, pivoted arm (17)
Radius of the length greater than runner A(15).
4. a kind of explosion-proof type vent cabinet air-valve transmission mechanism according to claim 1, it is characterised in that: the runner A
(15) arc-shaped slot A(20 is provided on), the pivoted arm (17) is arranged in the middle position of arc-shaped slot A(20), arc-shaped slot A
(20) it is distributed along pivoted arm (17) bilateral symmetry.
5. a kind of explosion-proof type vent cabinet air-valve transmission mechanism according to claim 1, it is characterised in that: the runner B
(16) the identical arc-shaped slot B(21 of radius there are two being opened on), the arc-shaped slot B(21) along guide groove (19) left and right pair
Claim distribution, the guide groove (19) along runner B(16) radius be arranged, and runner B(16) the center of circle in guide groove
(19) on the center line of length direction.
6. a kind of explosion-proof type vent cabinet air-valve transmission mechanism according to claim 1, it is characterised in that: the transmission shaft
B(11) be less than runner A(15 with the distance between transmission shaft C(12)) with runner B(16) the sum of radius.
7. a kind of explosion-proof type vent cabinet air-valve transmission mechanism according to claim 5, it is characterised in that: described is arc-shaped
Slot B(21) radius it is equal with the radius size of runner A(15).
8. a kind of explosion-proof type vent cabinet air-valve transmission mechanism according to claim 4, it is characterised in that: described is arc-shaped
Slot A(20) radius it is equal with the radius size of runner B(16).
9. a kind of explosion-proof type vent cabinet air-valve transmission mechanism according to claim 1, it is characterised in that: the transmission shaft
C(12) with blade rotor (8) by flanged joint, the rotation centerline in air valve blades (7) is arranged in the blade rotor (8)
On.
10. a kind of explosion-proof type vent cabinet air-valve transmission mechanism according to claim 1, it is characterised in that: the guiding
Slot (19) is to be arranged outward along the radial direction of runner B(16), and open-minded, the described guiding axis in outside of guide groove (19)
(18) it can be slided along guide groove (19), and guide groove (19) can be completely disengaged out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821787988.0U CN209084134U (en) | 2018-11-01 | 2018-11-01 | A kind of explosion-proof type vent cabinet air-valve transmission mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821787988.0U CN209084134U (en) | 2018-11-01 | 2018-11-01 | A kind of explosion-proof type vent cabinet air-valve transmission mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209084134U true CN209084134U (en) | 2019-07-09 |
Family
ID=67121956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821787988.0U Active CN209084134U (en) | 2018-11-01 | 2018-11-01 | A kind of explosion-proof type vent cabinet air-valve transmission mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209084134U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109084070A (en) * | 2018-11-01 | 2018-12-25 | 山东龙腾电力科技有限公司 | A kind of explosion-proof type vent cabinet air-valve transmission mechanism |
| CN111998111A (en) * | 2020-08-28 | 2020-11-27 | 刘华军 | Air brake device |
-
2018
- 2018-11-01 CN CN201821787988.0U patent/CN209084134U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109084070A (en) * | 2018-11-01 | 2018-12-25 | 山东龙腾电力科技有限公司 | A kind of explosion-proof type vent cabinet air-valve transmission mechanism |
| CN109084070B (en) * | 2018-11-01 | 2023-10-27 | 山东龙腾电力科技有限公司 | Explosion-proof fume chamber blast gate drive mechanism |
| CN111998111A (en) * | 2020-08-28 | 2020-11-27 | 刘华军 | Air brake device |
| CN111998111B (en) * | 2020-08-28 | 2022-06-10 | 平顶山天安煤业股份有限公司十矿 | Air brake device |
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