CN215409866U - Boiler pressure protection device - Google Patents
Boiler pressure protection device Download PDFInfo
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- CN215409866U CN215409866U CN202121559590.3U CN202121559590U CN215409866U CN 215409866 U CN215409866 U CN 215409866U CN 202121559590 U CN202121559590 U CN 202121559590U CN 215409866 U CN215409866 U CN 215409866U
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- brake
- impeller
- brake drum
- brake shoes
- spring
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Abstract
The utility model relates to a boiler pressure protection device, which effectively solves the problem of sharp reduction of boiler pressure; the technical scheme includes that the pneumatic brake comprises an air pipe, an impeller is arranged in the air pipe, the impeller can be driven to rotate when air in the air pipe flows, a brake drum coaxial with the impeller is fixed on the outer side of the air pipe, a rotating shaft of the impeller extends into the brake drum, a rotating disc is coaxially fixed on the rotating shaft in the brake drum, two brake shoes are hinged on the rotating disc, a spring is arranged between the two brake shoes, and the brake shoes can overcome the tension of the spring to be in contact with the brake drum to generate friction under the action of centrifugal force when the rotating disc rotates; the utility model can control the air pressure speed when an operator operates by mistake or an accident happens, gives enough reaction time to the operator, or controls the pressure relief speed under a safe range, avoids the damage to the boiler, and has firm structure and strong practicability.
Description
Technical Field
The utility model relates to the field of boiler safety production, in particular to a boiler pressure protection device.
Background
When the boiler is used, the pressure in the boiler cannot be reduced rapidly under any condition, so that the phenomenon that a large stress change is generated in the boiler due to the rapid pressure change is avoided, and finally a local joint and a welded junction are easy to crack is avoided.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a boiler pressure protection device, which effectively solves the problem that the boiler pressure is sharply reduced due to misoperation.
The technical scheme of its solution is, a boiler pressure protection device, including the trachea, be equipped with the impeller in the trachea, can drive the impeller rotation when the trachea is internal gas flow, be fixed with the brake drum coaxial with the impeller outside the trachea, the pivot of impeller stretches into in the brake drum, and is fixed with a carousel on the coaxial pivot in the brake drum, articulates on the carousel has two brake shoes, is equipped with the spring between two brake shoes, and the brake shoe can overcome spring pulling force and brake drum contact under the centrifugal force effect and produce the friction when the carousel rotates.
The brake drums are two, the two brake drums are located on two sides of an air pipe respectively, two ends of a rotating shaft of the impeller extend into the two brake drums respectively, rotating shafts in the two brake drums are respectively fixed with a rotating disc, each rotating disc is hinged with two brake shoes, and a spring is arranged between the two brake shoes on the same rotating disc, so that the two ends of the rotating shaft of the impeller are stressed uniformly, torsion of the rotating shaft of the impeller during air flow circulation is reduced, and the service life of the impeller is prolonged.
The brake shoes are centrally symmetrical on the rotary disc about the axis of the rotary disc, the hinged point of each brake shoe and the rotary disc is positioned at one end of each brake shoe, so that the load balance of the rotary disc is guaranteed, the two hinged points are centrally symmetrical about the axis of the rotary disc, the connecting points between the springs and the two brake shoes at the same side are also centrally symmetrical about the axis of the rotary disc, the centrifugal force borne by the two brake shoes when the rotary disc rotates is guaranteed to be the same, the two brake shoes are simultaneously contacted with the brake drum, the abrasion and the unbalance of the single brake shoe are prevented, and the speed reduction effect on the impeller is improved.
The outer side of the brake drum is provided with a cover plate, the cover plate can seal the rotary disc and the brake shoes in the brake drum, external dust is prevented from entering between the brake drum and the brake shoes, and the influence of the dust on the braking effect is avoided.
The two ends of the air pipe are fixed with flange plates, so that an operator can conveniently install the air pipe.
The utility model can control the air pressure speed when an operator operates by mistake or an accident happens, gives enough reaction time to the operator, or controls the pressure relief speed under a safe range, avoids the damage to the boiler, and has firm structure and strong practicability.
Drawings
FIG. 1 is a front view of the present invention.
Fig. 2 is a left side view of the present invention.
FIG. 3 is a front sectional view of the present invention.
FIG. 4 is a left side sectional view of the present invention.
Fig. 5 is a left side view of the present invention shown with the cover removed, when not in operation.
Fig. 6 is a left side view of the present invention with the cover plate removed in operation.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.
As shown in figures 1 to 6, the pneumatic brake device comprises an air pipe 1, an impeller 2 is arranged in the air pipe 1, the impeller 2 can be driven to rotate when air in the air pipe 1 flows, a brake drum 3 coaxial with the impeller 2 is fixed on the outer side of the air pipe 1, a rotating shaft of the impeller 2 extends into the brake drum 3, a rotating disc 4 is coaxially fixed on the rotating shaft in the brake drum 3, two brake shoes 5 are hinged on the rotating disc 4, a spring 6 is arranged between the two brake shoes 5, and when the rotating disc 4 rotates, the brake shoes 5 can overcome the tension of the spring 6 to be in contact with the brake drum 3 to generate friction under the action of centrifugal force.
The brake shoes 5 are centrally symmetrical on the rotary table 4 about the axis of the rotary table 4, the hinge point of each brake shoe 5 and the rotary table 4 is located at one end of each brake shoe 5, so that the load balance of the rotary table 4 is guaranteed, the two hinge points are centrally symmetrical about the axis of the rotary table 4, the connection point between the spring 6 and the two brake shoes 5 on the same side is also centrally symmetrical about the axis of the rotary table 4, the centrifugal force applied to the two brake shoes 5 when the rotary table 4 rotates is guaranteed to be the same, the two brake shoes 5 are simultaneously contacted with the brake drum 3, the single brake shoe 5 is prevented from being worn and is unbalanced, and the speed reduction effect on the impeller 2 is improved.
The outer side of the brake drum 3 is provided with a cover plate 7, the cover plate 7 can seal the rotary disc 4 and the brake shoes 5 in the brake drum 3, external dust is prevented from entering between the brake drum 3 and the brake shoes 5, and the influence of the dust on the braking effect is avoided.
And the two ends of the air pipe 1 are fixedly provided with flange plates 8, so that an operator can conveniently install the air pipe.
When the utility model is used, the air pipe 1 is connected between a tank body of a boiler and a pressure release valve or a safety valve through the flange plates 8 at two ends of the air pipe 1, the sealing effect is ensured, the flow speed in the air pipe 1 is determined according to the maximum pressure release speed which can be borne by the tank body, the maximum rotating speed of the impeller 2 is further determined, and finally, the proper spring 6 is selected according to the rotating speed, so that two brake shoes 5 can overcome the elastic force of the spring 6 to be in contact with the brake drum 3 before the impeller 2 reaches the maximum rotating speed, and the brake shoes 5 and the brake drum 3 have the same structure as a drum brake in the prior art, so that resistance is applied to the impeller 2, and the increasing speed of the rotating speed of the impeller 2 is further inhibited;
when pressure is relieved, if the pressure relief speed is in a normal range, the rotating speed of the impeller 2 pushed by the airflow to rotate is also in the normal range, at the moment, the centrifugal force borne by the two brake shoes 5 is not enough to enable the brake shoes 5 to overcome the elastic force of the spring 6 to be in contact with the brake drum 3, so the impeller 2 is only pushed to rotate by the airflow at the moment, if an operator makes a mistake or other accidents, the pressure relief speed is rapid, before the rotating speed of the impeller 2 is increased to the upper limit of the normal range, the centrifugal force borne by the two brake shoes 5 is enough to enable the brake shoes 5 to overcome the elastic force of the spring 6 to be in contact with the brake drum 3, friction is generated between the brake shoes 5 and the brake drum 3, the impeller 2 is provided with a rotating resistance through a disc, after the impeller 2 is subjected to the resistance, the rotating speed of the impeller 2 is inhibited from being increased, the rotating speed of the rotating speed is reduced, and the higher the rotating speed of the impeller 2 is, the extrusion force between the brake shoes 5 and the brake drum 3 is increased, the larger the resistance borne by the impeller 2 is, the larger the speed inhibition on the rotation speed increase of the impeller 2 is, namely the higher the rotation speed of the impeller 2 is, the more difficult the rotation speed increase is, when the thrust given to the impeller 2 by the airflow is equal to the resistance given by the brake shoe 5, the rotation speed of the impeller 2 is not increased any more, the protection on the pressure relief speed is realized, even if the thrust and the resistance are not balanced before the impeller 2 reaches the upper limit of the normal range, the friction between the brake shoe 5 and the brake drum 3 can also reduce the speed of the rotation speed increase of the impeller 2 to the maximum extent, the reaction time is given to an operator, the pressure relief valve or the safety valve is closed in time, and the boiler is protected from being damaged.
The utility model has the following remarkable advantages:
1. according to the utility model, the impeller 2 is arranged between the boiler tank body and the pressure release valve, the rotation of the impeller 2 is converted into the centrifugal force of the brake shoe 5, when the rotating speed of the impeller 2 is high enough, the brake shoe 5 is contacted with the brake drum 3 to generate friction, so that the increase of the rotating speed of the impeller 2 is slowed down, the increase of the rotating speed of the impeller 2 is stopped until the thrust given to the impeller 2 by the airflow is equal to the resistance given to the impeller 2 by the brake shoe 5, even if the thrust given to the impeller 2 by the airflow is continuously increased, the increase of the rotating speed of the impeller 2 can be slowed down to the greatest extent by the resistance given to the impeller 2 by the brake shoe 5, enough reaction time is given to an operator, and the boiler is protected from being damaged.
2. Two brake shoes 5 on the same side are connected through the same spring 6, and because the tension on the same spring 6 is equal everywhere, the two brake shoes 5 can simultaneously overcome the tension of the spring 6 and contact with the brake drum 3, and because the two brake drums 3 are symmetrically arranged on the two sides of the air pipe 1, and the disks on the two sides rotate at the same speed as the impeller 2, the four brake shoes 5 are simultaneously contacted with the brake drum 3, thereby not only preventing the transitional wear of a certain brake shoe 5, but also ensuring that the two ends of the impeller 2 simultaneously receive the same resistance, reducing the torsion borne by the impeller 2 and prolonging the service life of the impeller 2.
3. The utility model can change the rotating speed of the impeller 2 when the brake shoe 5 is contacted with the brake drum 3 by replacing the spring 6, thereby adapting to the maximum pressure relief speed of different boilers, enlarging the application range of the device and having more practicability.
Claims (5)
1. The utility model provides a boiler pressure protection device, which is characterized in that, including trachea (1), be equipped with impeller (2) in trachea (1), can drive impeller (2) and rotate when gas flows in trachea (1), trachea (1) outside is fixed with brake drum (3) coaxial with impeller (2), the pivot of impeller (2) stretches into in brake drum (3), and coaxial fixed with a carousel (4) in brake drum (3) in the pivot, it has two brake shoes (5) to articulate on carousel (4), be equipped with spring (6) between two brake shoes (5), brake shoe (5) can overcome spring (6) pulling force and brake drum (3) contact and produce the friction under the centrifugal force effect when carousel (4) rotate.
2. The boiler pressure protection device according to claim 1, wherein two brake drums (3) are provided, the two brake drums (3) are respectively positioned at two sides of the air pipe (1), two ends of a rotating shaft of the impeller (2) respectively extend into the two brake drums (3), a rotating disc (4) is respectively fixed on the rotating shaft in the two brake drums (3), each rotating disc (4) is hinged with two brake shoes (5), and a spring (6) is arranged between the two brake shoes (5) on the same rotating disc (4).
3. A boiler pressure protection device according to claim 1, characterized in that the brake shoes (5) are arranged on the rotary disc (4) in a central symmetry with respect to the axis of the rotary disc (4), the hinge point of each brake shoe (5) and the rotary disc (4) is arranged at one end of the brake shoe (5), the two hinge points are arranged in a central symmetry with respect to the axis of the rotary disc (4), and the connection point between the spring (6) and the two brake shoes (5) on the same side is also arranged in a central symmetry with respect to the axis of the rotary disc (4).
4. A boiler pressure protection device according to claim 1, characterized in that a cover plate (7) is arranged outside the brake drum (3), and the cover plate (7) can seal the rotary disc (4) and the brake shoe (5) in the brake drum (3).
5. A boiler pressure protection device according to claim 1, characterized in that flanges (8) are fixed to both ends of the gas pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121559590.3U CN215409866U (en) | 2021-07-09 | 2021-07-09 | Boiler pressure protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121559590.3U CN215409866U (en) | 2021-07-09 | 2021-07-09 | Boiler pressure protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215409866U true CN215409866U (en) | 2022-01-04 |
Family
ID=79648242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121559590.3U Active CN215409866U (en) | 2021-07-09 | 2021-07-09 | Boiler pressure protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215409866U (en) |
-
2021
- 2021-07-09 CN CN202121559590.3U patent/CN215409866U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |