CN220751496U - Manhole door hydrogen leakage preventing device of hydrogen cooling generator - Google Patents

Abstract

The utility model relates to the technical field of hydrogen-cooled generators and discloses a hydrogen leakage prevention device for a manhole door of a hydrogen-cooled generator, which comprises a generator body and a manhole door, wherein a manhole is arranged at the upper end of the generator body, the top end of the manhole is hinged with the manhole door, a gas collecting hood is arranged right above the manhole door, an electrochemical sensor is arranged on the inner wall of the gas collecting hood, and a sealing platform is fixed at the outer edge of the manhole door; when the hydrogen leaks, the electrochemical sensor gives an electric signal to the control box, and the control box controls the exhaust fan to work, and the exhaust fan discharges the leaked hydrogen into the atmosphere through the soft air pipe so as to achieve the purpose of diluting the hydrogen concentration; the piston rod of the air cylinder pushes the lifting frame and drives the gas collecting hood to move upwards, so that a worker can conveniently open the manhole door to enter for maintenance.

Description

Manhole door hydrogen leakage preventing device of hydrogen cooling generator

Technical Field

The utility model relates to the technical field of hydrogen-cooled generators, in particular to a hydrogen leakage preventing device for a manhole door of a hydrogen-cooled generator.

Background

The hydrogen is used as energy-saving and environment-friendly gas, industrial waste water and waste gas can not be generated when the hydrogen-cooled generator is used for cooling so as to avoid environmental pollution, and meanwhile, the hydrogen has extremely wide application range, is not only applied to the field of power engineering, but also plays an important role in the field of aerospace. It has excellent high heat conductivity and less heat loss, so that it has great advantages over traditional air cooling and water cooling. The manhole door is used as an access port which is convenient for an maintainer to enter the equipment to check and overhaul, meanwhile, hidden danger of hydrogen leakage exists, and when the concentration of hydrogen in the air reaches a certain value, explosion can easily occur when the hydrogen meets a fire source, so that the manhole door of the hydrogen cooling generator is very necessary to monitor the hydrogen leakage in real time.

As a patent document with publication number CN109158827a, a hydrogen-cooling unit hydrogen leakage prevention treatment process is disclosed, wherein the generator unit hydrogen leakage prevention treatment process comprises removing an insulating clamping plate; cutting off part of the metal partition plate arranged in the outlet box; the lead, the water conduit and the outlet sleeve which are positioned in the outlet box are protected; and welding a gap between the generator sealing base and the inner joint surface of the outlet box. However, this prior art still has some drawbacks, such as: the condition of leaking hydrogen at the manhole can not be monitored in real time, when the hydrogen leakage occurs at the manhole door of the hydrogen-cooled generator, the leaked hydrogen can not be intensively treated and discharged, and the manhole can not be opened by workers to enter for maintenance.

Disclosure of Invention

The utility model aims to provide a hydrogen leakage preventing device for a manhole door of a hydrogen-cooled generator, which aims to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a hydrogen-cooled generator manhole door leak hydrogen leak protection device, includes generator body and manhole door, the manhole has been seted up to generator body upper end, the manhole top articulates has the manhole door, be provided with the gas-collecting channel directly over the manhole door, the electrochemical sensor is installed to the gas-collecting channel inner wall, the gas-collecting channel top intercommunication has the tube socket, four corners of gas-collecting channel bottom are all fixed to be provided with the circle cover; the outer edge of the manhole door is fixedly provided with a sealing platform, four upright posts are vertically fixed on the upper surface of the sealing platform through a base, rectangular frames are welded at the top ends of the four upright posts together, and the round sleeve is sleeved on the outer walls of the upright posts in a sliding manner; the sealing platform rear end welding has the bearing frame, bearing frame upper surface fixed mounting has the cylinder, the flexible end of cylinder is fixed with the crane, the crane with the tube socket is fixed mutually.

As a further improvement to the scheme, the outer wall of the round sleeve is in threaded connection with a fastening screw, and the outer end of the fastening screw is fixed with a quincuncial handle.

As a further improvement to the scheme, the top end of the tube seat is communicated with a soft air tube, and an exhaust fan is connected to an air supply port of the soft air tube.

As a further improvement to the scheme, the signal output end of the electrochemical sensor is connected with the signal input end of the control box through a wire, the signal output end of the control box is connected with the signal input end of the hydrogen alarm and the signal input end of the exhaust fan through a wire, the control box is fixed on the upper surface of the bearing frame, and the hydrogen alarm is arranged on the upper surface of the control box.

As a further improvement to the scheme, end covers are arranged at two ends of the generator body, rotor bearings penetrate through the end covers at two sides, and the driving end of each rotor bearing is connected with an exciter.

As a further improvement to the scheme, the upper surfaces of the left side and the right side of the generator body are respectively provided with a hydrogen cooler through air pipe connection.

As a further improvement to the scheme, the generator body internally provided with a rotor and a stator, wherein the rotor comprises a rotor core and a rotor coil, the rotor coil is embedded in the periphery of a groove of the rotor core, axial fans are arranged at two ends of the rotor, the stator comprises a stator core and a stator coil, the stator coil is embedded in a groove of the stator core, and the rotor is inserted in the stator core.

As a further improvement to the scheme, a plurality of supporting frames are arranged on the front side and the rear side of the bottom end of the generator body, supporting plates are jointly arranged on the same side of the bottom ends of the supporting frames, and the supporting plates are fixed with the ground through bolts.

As a further improvement to the scheme, the front end side wall of the generator body is welded with a ladder, and the ladder is fixed with the ground through bolts.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model is provided with the gas collecting hood, the gas collecting hood is arranged right above the manhole door, the top end of the gas collecting hood is communicated with the pipe seat, the top end of the pipe seat is communicated with the flexible air pipe, the air supply opening of the flexible air pipe is connected with the exhaust fan, the outer edge of the manhole door is fixedly provided with the sealing platform, and the control box is fixed on the upper surface of the bearing frame; when the hydrogen cooling generator is powered on, the gas collecting hood is in close contact with the sealing platform to achieve the sealing effect, an electrochemical sensor arranged on the inner wall of the gas collecting hood monitors the concentration of hydrogen in the gas collecting hood in real time, when the hydrogen leaks, the electrochemical sensor gives an electric signal to the control box, the control box controls the exhaust fan to work, and the exhaust fan discharges the leaked hydrogen to the atmosphere through the soft air pipe to achieve the purpose of diluting the concentration of the hydrogen; the telescopic end of the air cylinder is fixedly provided with a lifting frame, the lifting frame is fixed with the pipeline, and at the moment, a piston rod of the air cylinder pushes the lifting frame and drives the gas collecting hood to move upwards, so that a worker can conveniently open the manhole door to enter and overhaul.

2. According to the utility model, the circular sleeves are arranged, and the circular sleeves fixed at the four corners of the bottom end of the gas collecting hood slide on the outer walls of the stand columns to achieve the purpose of balancing the lifting gas collecting hood, and the rectangular frames are welded at the top ends of the four stand columns together, so that the four stand columns can be provided with structural stability; further, the circular sleeve outer wall threaded connection has fastening screw, and fastening screw outer end is fixed with plum blossom type handle, when the gas collecting channel rose certain height, through the effect of fastening screw locking stand in order to reach spacing gas collecting channel, effectively prevented that the gas collecting channel from dropping suddenly and causing personnel to be injured, the plum blossom type handle of installing is in order to be convenient for staff's installation and dismantlement to work efficiency has been improved greatly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a first perspective view of the present utility model;

FIG. 2 is a schematic view of a second perspective view of the present utility model;

FIG. 3 is a schematic view of a lifting structure of a gas collecting hood according to the present utility model;

FIG. 4 is a schematic cross-sectional view of a gas hood according to the present utility model;

fig. 5 is a schematic diagram of a rotor and stator combination according to the present utility model.

In the figure: 1-a generator body; 2-manhole door; 3-a gas collecting hood; 4-sealing a platform; 5-a carrier; 6-cylinder; 7-end caps; 8-supporting frames; 9-a step; 10-rotor; 11-a stator; a 12-hydrogen cooler; 21-manhole; 31-tube seat; 311-soft wind pipe; 312-exhaust fan; 32-an electrochemical sensor; 33-round sleeve; 34-fastening a screw; 35-plum blossom type handle; 41-upright posts; 42-rectangular frame; 51-a control box; 52-a hydrogen alarm; 61-lifting frames; 71-rotor bearings; 72-exciter; 81-supporting plates; 101-rotor core; 102-rotor coils; 103-an axial fan; 111-stator core; 112-stator coils.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

The embodiment 1 discloses a hydrogen-cooled generator manhole door leakage prevention device, as shown in fig. 1, 3 and 4, comprising a generator body 1 and a manhole door 2, wherein a manhole 21 is arranged at the upper end of the generator body 1, the top end of the manhole 21 is hinged with the manhole door 2, a gas collecting hood 3 is arranged right above the manhole door 2, an electrochemical sensor 32 is arranged on the inner wall of the gas collecting hood 3, the signal output end of the electrochemical sensor 32 is connected with the signal input end of a control box 51 through a wire, the signal output end of the control box 51 is connected with the signal input end of a hydrogen alarm 52 and the signal input end of an exhaust fan 312 through a wire, the control box 51 is fixed on the upper surface of a bearing frame 5, the hydrogen alarm 52 is arranged on the upper surface of the control box 51, and round sleeves 33 are fixedly arranged at four corners of the bottom end of the gas collecting hood 3; the outer edge of the manhole door 2 is fixedly provided with a sealing platform 4, the upper surface of the sealing platform 4 is vertically fixed with four upright posts 41 through a base, the top ends of the four upright posts 41 are welded with a rectangular frame 42 together, and a round sleeve 33 is sleeved on the outer wall of the upright post 41 in a sliding manner; the rear end of the sealing platform 4 is welded with a bearing frame 5, the upper surface of the bearing frame 5 is fixedly provided with an air cylinder 6, the telescopic end of the air cylinder 6 is fixedly provided with a lifting frame 61, the top end of the gas collecting hood 3 is communicated with a tube seat 31, the top end of the tube seat 31 is communicated with a soft air pipe 311, the air supply opening of the soft air pipe 311 is connected with an exhaust fan 312, and the lifting frame 61 is fixed with the tube seat 31; when the hydrogen cooling generator is powered on, the gas collecting hood 3 is in close contact with the sealing platform 4 to achieve the sealing effect, the electrochemical sensor 32 arranged on the inner wall of the gas collecting hood 3 can monitor the hydrogen concentration in the gas collecting hood 3 in real time, when the hydrogen leaks, the electrochemical sensor 32 gives an electric signal to the control box 51, the control box 51 controls the exhaust fan 312 to work, and the exhaust fan 312 exhausts the leaked hydrogen to the atmosphere through the soft air pipe 311 to achieve the purpose of diluting the hydrogen concentration; when the concentration of leaked hydrogen reaches a certain value, the control box 51 controls the hydrogen alarm 52 to alarm, and reminds workers of timely maintenance so as to avoid potential safety hazards; in order to facilitate the personnel to open the manhole door 2 and enter the maintenance, the piston rod of the air cylinder 6 pushes the lifting frame 61 and drives the gas collecting hood 3 to move upwards, the round sleeves 33 fixed at the four corners of the bottom end of the gas collecting hood 3 slide on the outer walls of the upright posts 41 to achieve the purpose of balancing the lifting gas collecting hood 3, and the top ends of the four upright posts 41 are welded with rectangular frames 42 together to enable the four upright posts 41 to be stable in structure.

The control mode of the utility model is realized by controlling the control box, the control circuit of the control box can be realized by simple programming of a person skilled in the art, and the utility model is mainly used for protecting a mechanical device, so the utility model does not explain the control mode in detail.

As shown in fig. 1 and 5, a rotor 10 and a stator 11 are installed inside a generator body, the rotor 10 comprises a rotor iron core 101 and rotor coils 102, the rotor coils 102 are arranged outside grooves Zhou Qianzhuang of the rotor iron core 101, axial flow fans 103 are installed at two ends of the rotor 10, the stator 11 comprises a stator iron core 111 and stator coils 112, the stator coils 112 are embedded in grooves of the stator iron core 111, the rotor 10 is inserted inside the stator iron core 111, and hydrogen in the generator is forced to circulate inside the generator in a closed circulation mode under the driving of the axial flow fans 103, so that the iron core and the rotor coils 102 of the generator are cooled; end covers 7 are arranged at two ends of the generator body, rotor bearings 71 are penetrated through the inside of the end covers at two sides together, the driving end of each rotor bearing 71 is connected with an exciter 72, and the exciter 72 can give direct-current exciting current required by a magnetic field generated by the generator; the upper surfaces of the left side and the right side of the generator body are respectively provided with a hydrogen cooler 12 through air pipe connection, when the hydrogen-cooled generator works, a heat source can generate a large amount of heat, hydrogen in the hydrogen cooler 12 can absorb the heat, then the heat is transferred to a cooling medium through a pipeline, and finally the heat is emitted to the air.

The working principle of the utility model is described as follows: when a worker runs the hydrogen-cooled generator, the high heat conduction performance of the hydrogen is utilized to quickly transfer heat generated in the generator into the hydrogen, and then the heat is taken away through the flow of the hydrogen, so that the normal running temperature of the generator is maintained. The gas collecting hood 3 is tightly contacted with the sealing platform 4 to achieve the sealing effect, the electrochemical sensor 32 arranged on the inner wall of the gas collecting hood 3 can monitor the hydrogen concentration in the gas collecting hood 3 in real time, when the hydrogen leaks, the electrochemical sensor 32 gives an electric signal to the control box 51, the control box 51 at the moment controls the exhaust fan 312 to work, and the exhaust fan 312 discharges the leaked hydrogen to the atmosphere through the soft air pipe 311 to achieve the purpose of diluting the hydrogen concentration; when the concentration of leaked hydrogen reaches a certain value, the control box 51 controls the hydrogen alarm 52 to alarm, and reminds workers of timely maintenance so as to avoid potential safety hazards; in order to facilitate the operator to open the manhole door 2 and enter the maintenance, at this moment, the piston rod of the air cylinder 6 pushes the lifting frame 61 and drives the gas-collecting channel 3 to move upwards, the round sleeves 33 fixed at the four corners of the bottom end of the gas-collecting channel 3 slide on the outer walls of the upright posts to achieve the purpose of balancing the lifting gas-collecting channel 3, and the top ends of the four upright posts 41 are welded with rectangular frames 42 together to ensure that the four upright posts 41 have structural stability; further, the outer wall threaded connection of circle cover 33 has fastening screw 34, and fastening screw 34 outer end is fixed with plum blossom handle 35, when gas collecting channel 3 risees certain height, through the effect of fastening screw 34 locking stand 41 in order to reach spacing gas collecting channel 3, effectively prevent that gas collecting channel 3 drops suddenly and cause personnel to be injured, and the plum blossom handle 35 of installing is so that the staff installs and dismantles to work efficiency has been improved greatly.

Example 2

In embodiment 2, on the basis of embodiment 1, as shown in fig. 1, 2 and 3, the outer wall of a round sleeve 33 fixedly arranged at four corners of the bottom end of a gas collecting hood 3 is connected with a fastening screw 34 through threads, and the outer end of the fastening screw 34 is fixed with a quincuncial handle 35; when the manhole door 2 is leaked, the manhole door 2 is opened for the convenience of workers to enter and overhaul, at the moment, the piston rod of the air cylinder 6 pushes the lifting frame 61 and drives the gas collecting hood 3 to move upwards, when the gas collecting hood 3 ascends to a certain height, the upright column 41 is locked through the fastening screw 34 so as to achieve the effect of limiting the gas collecting hood 3, the gas collecting hood 3 is effectively prevented from suddenly falling to cause personnel injury, and the quincuncial handle 35 is arranged so as to facilitate the installation and the disassembly of the workers, so that the working efficiency is greatly improved.

In embodiment 2, a plurality of support frames 8 are mounted on the front and rear sides of the bottom end of the generator body 1, support plates 81 are mounted on the bottom ends of the support frames on the same side, and the support plates 81 are fixed with the ground through bolts, so that the structural stability of the hydrogen-cooled generator can be enhanced; in order to facilitate the workers to quickly enter the manhole 21, the front end side wall of the generator body 1 is welded with a ladder 9, and the ladder 9 is fixed with the ground through bolts, so that the safety of the workers in the ladder climbing process is ensured.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. The utility model provides a hydrogen cooling generator manhole door leak hydrogen leak protection device, includes generator body (1) and manhole door (2), its characterized in that: a manhole (21) is formed in the upper end of the generator body (1), the top end of the manhole is hinged with the manhole door (2), a gas collecting cover (3) is arranged right above the manhole door (2), an electrochemical sensor (32) is arranged on the inner wall of the gas collecting cover (3), a tube seat (31) is communicated with the top end of the gas collecting cover (3), and round sleeves (33) are fixedly arranged at four corners of the bottom end of the gas collecting cover (3); the outer edge of the manhole door (2) is fixedly provided with a sealing platform (4), four upright posts (41) are vertically fixed on the upper surface of the sealing platform (4) through a base, rectangular frames (42) are welded at the top ends of the four upright posts (41) together, and the round sleeve (33) is sleeved on the outer wall of the upright posts (41) in a sliding mode; the sealing platform is characterized in that a bearing frame (5) is welded at the rear end of the sealing platform (4), an air cylinder (6) is fixedly arranged on the upper surface of the bearing frame (5), a lifting frame (61) is fixed at the telescopic end of the air cylinder (6), and the lifting frame (61) is fixed with the tube seat (31).

2. The hydrogen leakage prevention device for a manhole door of a hydrogen-cooled generator according to claim 1, wherein: the outer wall of the round sleeve (33) is in threaded connection with a fastening screw (34), and the outer end of the fastening screw (34) is fixedly provided with a quincuncial handle (35).

3. The hydrogen leakage prevention device for a manhole door of a hydrogen-cooled generator according to claim 1, wherein: the top end of the tube seat (31) is communicated with a soft air tube (311), and an exhaust fan (312) is connected to an air supply opening of the soft air tube (311).

4. A hydrogen-cooled generator manhole door hydrogen leakage prevention device according to claim 3, wherein: the signal output end of the electrochemical sensor (32) is connected with the signal input end of the control box (51) through a wire, the signal output end of the control box (51) is connected with the signal input end of the hydrogen alarm (52) and the signal input end of the exhaust fan (312) through a wire, the control box (51) is fixed on the upper surface of the bearing frame (5), and the hydrogen alarm (52) is installed on the upper surface of the control box (51).

5. The hydrogen leakage prevention device for a manhole door of a hydrogen-cooled generator according to claim 1, wherein: end covers (7) are arranged at two ends of the generator body (1), rotor bearings (71) penetrate through the end covers (7) at two sides, and an exciter (72) is connected to the driving end of each rotor bearing (71).

6. The hydrogen leakage prevention device for a manhole door of a hydrogen-cooled generator according to claim 1, wherein: the upper surfaces of the left side and the right side of the generator body (1) are respectively provided with a hydrogen cooler (12) through air pipe connection.

7. The hydrogen leakage prevention device for a manhole door of a hydrogen-cooled generator according to claim 1, wherein: the generator comprises a generator body (1), wherein a rotor (10) and a stator (11) are arranged in the generator body, the rotor comprises a rotor core (101) and a rotor coil (102), the rotor coil (102) is embedded in the periphery of a groove of the rotor core (101), an axial flow fan (103) is arranged at two ends of the rotor, the stator (11) comprises a stator core (111) and a stator coil (112), the stator coil (112) is embedded in a groove of the stator core (111), and the rotor (10) is inserted in the stator core (111).

8. The hydrogen leakage prevention device for a manhole door of a hydrogen-cooled generator according to claim 1, wherein: the novel electric generator is characterized in that a plurality of supporting frames (8) are arranged on the front side and the rear side of the bottom end of the generator body (1), supporting plates (81) are jointly arranged on the same side of the bottom ends of the supporting frames (8), and the supporting plates (81) are fixed with the ground through bolts.

9. The hydrogen leakage prevention device for a manhole door of a hydrogen-cooled generator according to claim 1, wherein: the front end side wall of the generator body (1) is welded with a personal ladder (9), and the personal ladder (9) is fixed with the ground through bolts.