Taper pipe mandoor safety protection device during water turbine maintenance

Abstract

The utility model discloses a taper pipe mandoor safety protection device during water turbine maintenance, which comprises an electric opening and closing door arranged on a water turbine shell, the electric opening and closing door comprises a roller shutter frame arranged on the outer side of a taper pipe mandoor, a roller shutter device is arranged at the top of the roller shutter frame, a net curtain is arranged at the bottom of the roller shutter device, and the electric opening and closing door is connected with the electric opening and closing door. The device not only can be automatically unfolded and folded, but also can be operated through a remote control system, the safety and the working efficiency of a working area are greatly improved, in addition, the design of the device considers the environmental adaptability and the warning effect, and the device is suitable for popularization and application. And it is ensured that the optimal performance can be achieved under various conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbine maintenance, in particular to a safety protection device for a cone pipe entry door during water turbine maintenance. Background Art

[0002] The runner is a critical component in a hydro turbine, and its performance and safety directly impact the overall turbine's operating efficiency and stability. During runner maintenance and overhaul, the safety of the conical access door (also known as the conical tube door) is crucial, serving as a passage for maintenance personnel to enter the runner interior. Chinese utility model patent CN220599917U discloses a rotary hydro turbine access door that, through a U-shaped door shaft seal and other technical solutions, allows the door to rotate 360 ​​degrees. However, existing conical tube access doors offer limited warning effectiveness, and simple warning signs are easily moved. This fails to effectively prevent unauthorized personnel from entering risk areas during turbine overhaul, posing a significant safety hazard to unauthorized personnel or maintenance personnel during overhaul or turbine commissioning. Utility Model Content

[0003] This utility model patent aims to solve the deficiencies in the prior art and provide a safety protection device for a cone tube entry door during turbine maintenance, so as to solve the problem of unauthorized personnel entering the interior of the turbine during turbine maintenance.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a safety protection device for the cone pipe entrance door during turbine maintenance, including an electric switch door installed on the outer shell of the turbine, the electric switch door includes a roller shutter frame arranged on the outside of the cone pipe entrance hole, a roller shutter device is installed on the top of the roller shutter frame, a net curtain is provided at the bottom of the roller shutter device, and slides are installed on the inner frames on both sides of the roller shutter frame for the net curtain to slide up and down.

[0005] Preferably, an access control system is also installed on the turbine outer shell, and the access control system is electrically connected to the control end of the roller shutter through a wire buried in the turbine outer shell. An electromagnetic suction device is provided at the connection position between the net curtain and the roller shutter frame, and the electromagnetic suction device is electrically connected to the access control system through a wire.

[0006] Preferably, a counterweight rod is provided at the bottom of the net curtain, and a handle is provided on the counterweight rod.

[0007] Preferably, the electromagnetic suction device includes an electromagnetic suction device arranged on the bottom frame of the rolling shutter frame and a suction plate arranged at the bottom of the counterweight rod.

[0008] Preferably, the electric switch door is also provided with an audible and visual alarm, and the audible and visual alarm is connected to the access control system.

[0009] Preferably, a detection sensor is provided inside the conical tube manhole for detecting the entry of personnel.

[0010] Beneficial effects of the utility model:

[0011] The utility model can not only be automatically deployed and retracted, but also be operated through a remote control system, which greatly improves the safety and efficiency of the working area. In addition, the design of the device takes into account environmental adaptability and warning effects to ensure optimal performance under various conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0013] In the figure: 1. Cone tube manhole; 2. Roller; 3. Net curtain; 4. Roller frame; 5. Electromagnetic suction; 6. Handle; 7. Suction plate; 8. Counterweight rod; 9. Access control system. DETAILED DESCRIPTION

[0014] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0015] like Figure 1 As shown, it includes an electric switch door installed on the outer shell of the turbine, and the electric switch door includes a roller shutter frame 4 arranged on the outside of the cone pipe entrance hole 1, a roller shutter device 2 is installed on the top of the roller shutter frame 4, and a net curtain 3 is installed at the bottom of the roller shutter device 2. Slides are installed on the inner frames on both sides of the roller shutter frame 4 for the net curtain 3 to slide up and down. Specifically, in this embodiment, the traditional turbine maintenance cone entrance door is mainly to open a rectangular through hole or rectangular door on the outer shell of the turbine to accommodate workers to enter, and a fixed door that can be opened and closed is installed by technical means such as door shaft sealing, and a safety device is set up at the door during construction. The sign prevents outsiders from entering by mistake, but due to the limitations of the safety sign, it is easy to be transferred and the traditional rectangular door cannot effectively prevent outsiders from entering, which poses certain safety risks. Therefore, the utility model arranges an electric opening and closing door on the outside of the door frame of the cone tube entrance hole 1. In this embodiment, a roller shutter frame 4 is arranged on the outside of the door frame of the cone tube entrance hole 1, and the roller shutter 2 drives the net curtain 3 to rise and fall to electrically open and close the door. However, electric off-axis doors, electric sliding doors and other structures can also be used. The cone tube entrance hole 1 is completely closed by the electric opening and closing door, and can be used in conjunction with access control systems such as NFC to prevent unauthorized entry.

[0016] Preferably, an access control system 9 is also installed on the turbine outer shell, and the access control system 9 is electrically connected to the control end of the roller shutter 2 through a wire buried in the turbine outer shell. An electromagnetic suction device is provided at the connection position of the mesh curtain 3 and the roller shutter frame 4, and the electromagnetic suction device is electrically connected to the access control system 9 through a wire. In this embodiment, the mesh curtain 3 is electrically connected to the access control system 9 through a wire buried in the turbine outer shell, or is electrically connected to the access control system 9 through a wire provided on the inner wall of the turbine. A fully enclosed switch is achieved through the operating system, and the switch can be remotely controlled by the background system, thereby improving the practicality of the turbine maintenance cone pipe entrance door. At the same time, an electromagnetic suction device is provided at the switch door connection of the electric switch door, and is electrically connected to the access control system 9 through a wire, so that the electric switch door is further locked to prevent it from being pulled open. At the same time, in this embodiment, the mesh curtain 3 is made of corrosion-resistant flexible material, the mesh curtain 3 is arranged in a rectangular shape, and a plurality of through holes are evenly opened on the mesh curtain 3.

[0017] Preferably, a counterweight rod 8 is provided at the bottom of the mesh curtain 3, and a handle 6 is provided on the counterweight rod 8. In this embodiment, a counterweight rod 8 is provided at the bottom of the mesh curtain 3, and both ends of the counterweight rod 8 extend into the slides on the inner frames on both sides of the rolling curtain frame 4 respectively. The length is equal to that of the bottom of the mesh curtain 3 and is used to increase the weight of the mesh curtain 3 to maintain the stability of lifting. At the same time, a handle is provided on the counterweight rod 8 on the outside of the conical tube manhole 1 to facilitate the staff to manually pull open the mesh curtain.

[0018] Preferably, the electromagnetic suction device includes an electromagnetic suction 5 arranged on the bottom frame of the rolling shutter frame 4 and a suction piece 7 arranged at the bottom of the counterweight rod 8. In this embodiment, the specific electromagnetic suction device includes a group of electromagnetic suction 5 and a group of suction pieces 7, wherein the electromagnetic suction 5 is fixedly installed on the door frame. This door frame is not limited to the bottom frame of the rolling shutter frame 4, and can also be applied when facing other electric switch doors. At the same time, the suction piece 7 is installed on the liftable door curtain 3. When in use, when the electric switch door is fully closed, the electromagnetic suction 5 is energized through the access control system 9, and the electromagnetic suction and the suction piece 7 realize electromagnetic adsorption to enhance the closing performance of the electric switch door. The suction piece 7 is made of metal such as iron, and the suction piece 7 is fixed on the counterweight rod 8.

[0019] Preferably, the electric switch door is also provided with an audible and visual alarm, which is connected to the access control system. In this embodiment, when the staff fails to close the electric switch door by mistake and an outsider enters by mistake, the audible and visual alarm is used to remind the staff near the electric switch door; when in use, a surveillance camera can be installed above the door frame of the electric switch door to cooperate with the audible and visual alarm for early warning.

[0020] Preferably, a detection sensor is provided on the inside of the cone manhole 1 for detecting the entry of personnel. The detection sensor is installed inside the turbine, i.e., on the inside of the cone manhole 1. When the detection sensor detects that a person has mistakenly entered the cone door, a detection signal is sent to the access control controller, and the access control controller controls the sound and light alarm to sound an alarm.

[0021] The specific working method of this application is: by triggering the "rolling curtain open" button on the access control system 9, the electric roller curtain will unfold the net curtain 3, which can quickly cover the cone tube manhole 1, thereby preventing people from mistakenly entering the cone tube door; by triggering the "rolling curtain close" button on the access control system 9, the electric roller curtain will retract the net curtain 3, and the cone tube manhole 1 will be opened, so that the staff can enter the cone tube door. The access control system 9 can also be connected to the control system of the runner, and the control system of the runner sends the working status signal of the runner to the access control system. The access control system automatically controls the electric roller curtain when the turbine runner is working. The roller closes the net curtain 3, and a prominent warning sign and text are painted on the outside of the net curtain 3 to warn relevant personnel to avoid entering the conical door. For example, in this embodiment, the outside of the net curtain is painted with a "Do Not Enter" pictorial and textual sign. Simultaneously, when the electromagnetic suction 5 is energized, it generates a magnetic force, attracting and connecting the electromagnetic suction 5 and the suction plate 7 to securely lock the net curtain 3 to the door frame. When the electromagnetic suction 5 is de-energized, the magnetic force disappears, allowing the electric roller to retract the net curtain 3. A detection sensor is located on the inside of the conical door. The audible and visual alarms and the detection sensor are connected to the access control system. When the detection sensor detects a person entering the conical door, it sends a detection signal to the access control controller, which then controls the audible and visual alarms to sound an alarm.

[0022] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A safety protection device for a cone pipe access door during maintenance of a turbine, comprising an electrically operated switch door mounted on the outer casing of the turbine, characterized in that: The electric switch door comprises a rolling curtain frame (4) arranged outside the cone tube manhole (1), a rolling curtain device (2) is installed on the top of the rolling curtain frame (4), a net curtain (3) is arranged on the bottom of the rolling curtain device (2), and slideways are installed on the inner frames on both sides of the rolling curtain frame (4) for the net curtain (3) to slide up and down. The turbine outer shell is also equipped with an access control system (9), the access control system (9) is electrically connected to the control end of the rolling curtain device (2) through a wire buried in the turbine outer shell, and an electromagnetic suction device is provided at the connection position between the net curtain (3) and the rolling curtain frame (4), and the electromagnetic suction device is electrically connected to the access control system (9) through a wire.

2. The safety protection device for the cone access door during maintenance of a hydraulic turbine according to claim 1, characterized in that: A counterweight rod (8) is provided at the bottom of the net curtain (3), and a handle (6) is provided on the counterweight rod (8).

3. The safety protection device for the cone access door during maintenance of a hydraulic turbine according to claim 2, characterized in that: The electromagnetic suction device comprises an electromagnetic suction (5) arranged on the bottom frame of the rolling curtain frame (4) and a suction plate (7) arranged at the bottom of the counterweight rod (8).

4. The safety protection device for the cone access door during maintenance of a hydraulic turbine according to claim 1, characterized in that: The electric switch door is also provided with an audible and visual alarm, which is connected to the access control system.

5. The safety protection device for the cone access door during maintenance of a hydraulic turbine according to claim 4, characterized in that: A detection sensor is provided inside the conical tube manhole (1) for detecting the entry of a person.

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