Oxygen supplementing device for water collecting well

Abstract

The utility model discloses an oxygen supplementing device for a water collecting well, which relates to the technical field of water collecting wells of power stations and comprises an oxygen supplementing device body, a first oxygen supplementing pipe and a second oxygen supplementing pipe, the oxygen supplementing device body is arranged outside the water collecting well and can be used for conveying air, and the first oxygen supplementing pipe and the second oxygen supplementing pipe are led out of the oxygen supplementing device body and extend into the water collecting well. And a plurality of air supply ports are formed in the first oxygen supplementing pipe and the second oxygen supplementing pipe. According to the utility model, air is introduced into the water-collecting well through the oxygen supplementing pipe by utilizing the fan, so that the requirement of the specifications of occupational hazard protection specifications for operation in closed space is met, and reliable safety guarantee is provided for underground operation of maintainers.

Description

Technical Field

[0001] The utility model relates to the technical field of water collection wells in power stations, in particular to an oxygen supplement device for a water collection well. Background Art

[0002] The function of the leakage collection well in the main powerhouse of a hydropower plant is to collect the leakage water of the main powerhouse. When the water level in the leakage collection well reaches the pump start level, the water in the leakage collection well needs to be discharged out of the powerhouse. However, since the leakage collection well is deep and has been in a confined space for a long time, it is opened less frequently, resulting in a lack of oxygen inside. However, there are components of water pumps, liquid level sensors, and liquid level switches under the leakage collection well, which require regular maintenance and overhaul every year. Before the maintenance personnel enter the well to work, they need to open the manhole cover for a period of time to ensure that the oxygen content in the leakage collection well meets the requirements for safe operation. However, there is no clear opening time requirement at present, and the leakage collection well is generally deep, and it is not possible to ensure whether the oxygen content in the well meets the standard. If the staff blindly enters the well, especially at the bottom, due to the lack of air circulation and lack of oxygen, it is easy to have safety hazards. Therefore, at this stage, it is urgent to design a device that can provide oxygen for the staff when they work underground to ensure that the staff maintains a good physical condition when performing maintenance and overhaul work. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a water collection well oxygen supplement device. When the staff are working, the fan and the air supply pipe can be used to pass air into the water collection well, thereby ensuring the oxygen content in the water collection well and effectively protecting the health and safety of the staff during work.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A water collection well oxygen supply device comprises an oxygen supply device body arranged outside the water collection well and capable of conveying air, a No. 1 oxygen supply pipe and a No. 2 oxygen supply pipe led out from the oxygen supply device body, the No. 1 oxygen supply pipe and the No. 2 oxygen supply pipe extending to the inside of the water collection well; a plurality of air supply ports are provided on the No. 1 oxygen supply pipe and the No. 2 oxygen supply pipe.

[0006] Furthermore, a No. 1 fan and a No. 2 fan are installed inside the oxygen supplementation device body, the air outlet of the No. 1 fan is connected to the No. 1 oxygen supplementation pipe, and the air outlet of the No. 2 fan is connected to the No. 2 oxygen supplementation pipe.

[0007] Furthermore, the No. 1 oxygen supply pipe and the No. 2 oxygen supply pipe extend to the bottom of the sump and extend downward along both sides of the maintenance ladder respectively.

[0008] Furthermore, 16 air supply ports are evenly spaced apart on the No. 1 oxygen supply pipe and the No. 2 oxygen supply pipe, and a switch is installed on each of the air supply ports.

[0009] Furthermore, it also includes a control system installed in the oxygen supplementation device body, and the switch on each air supply port is connected to the control system through a signal line; an oxygen content sensor is installed at the lower end of the maintenance ladder inside the water collection well, and the oxygen content sensor is connected to the control system through a signal line.

[0010] Furthermore, it also includes a plurality of proximity sensors which are equally spaced vertically inside the water collection well, and the proximity sensors are connected to the control system via signal lines.

[0011] Furthermore, 16 proximity sensors are provided.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] (1) The utility model uses a fan to introduce air into the water collection well through an oxygen supply pipe, which meets the requirements of the "Occupational Hazard Protection Standards for Working in Confined Spaces" and provides a reliable safety guarantee for maintenance personnel working underground.

[0014] (2) The utility model has a plurality of air supply ports on the air supply pipe, which can accurately supply oxygen to the area where the maintenance personnel are located.

[0015] (3) The utility model installs an oxygen content sensor at the bottom of the water collection well to monitor the oxygen content at the bottom of the water collection well. When maintenance personnel enter the water collection well and the oxygen content at the bottom of the water collection well is lower than 18%, the fan in the oxygen supply device starts, and all the air supply ports on the No. 1 oxygen supply pipe are opened to oxygenate the water collection well. When the proximity sensor detects the presence of maintenance personnel, the eight air supply ports on the No. 2 oxygen supply pipe near the proximity sensor will open to achieve accurate oxygen supply to the maintenance personnel's working area. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the overall structure diagram of the utility model;

[0017] Figure 2 This is a structural diagram of a specific embodiment of the utility model.

[0018] The names corresponding to the reference numerals are:

[0019] 1- oxygen supply device body, 2- fan No. 1, 3- fan No. 2, 4- oxygen supply pipe No. 2, 5- oxygen supply pipe No. 1, 6- air supply port, 7- proximity sensor, 8- oxygen content sensor. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The present invention includes but is not limited to the following embodiments.

[0021] like Figure 1 , 2 As shown, the present embodiment provides a water collection well oxygen supply device, including an oxygen supply device body 1, a No. 1 fan 2 and a No. 2 fan 3 installed inside the oxygen supply device body 1, an No. 1 oxygen supply pipe 5 is led out from the air outlet of the No. 1 fan 2, and a No. 2 oxygen supply pipe 4 is led out from the air outlet of the No. 2 fan 3. The two oxygen supply pipes are respectively connected to the fans, pass through the side of the oxygen supply device body 1, extend to both sides of the water collection well mouth maintenance ladder, and extend along both sides of the maintenance ladder inside the water collection well to the bottom of the water collection well. Each oxygen supply pipe is provided with a plurality of air supply ports 6 in equal parts according to the length, and a switch is installed on each air supply port. Preferably, 16 air supply ports are provided in the present embodiment, and all the air supply ports are directed to the wall of the maintenance ladder. The present embodiment accurately realizes oxygen supply to the water collection well maintenance personnel by controlling the air supply port switch on the oxygen supply pipe. In addition, a control system is provided inside the oxygen supply device body 1, and the switch on each air supply port is connected to the control system through a signal line. Through the function of the control system, the opening or closing of the air supply port can be controlled; an oxygen content sensor 8 is provided at the bottom of the water collection well, and the oxygen content sensor is connected to the control system through a signal line. When the oxygen content is lower than 18%, the signal is transmitted to the control system, the nourishment device is started, and the 16 air supply ports 6 on the No. 1 oxygen supply pipe 5 are all opened to supplement oxygen to the water collection well. A plurality of proximity sensors 7 are provided in the vertical division of the maintenance ladder. Preferably, 16 proximity sensors 7 are provided in this embodiment, and the proximity sensors 7 are also connected to the control system through a signal line. When the maintenance personnel enter the water collection well to work, the oxygen supply device is started, and the 16 air supply ports on the No. 1 oxygen supply pipe 5 are fully opened for oxygen supplementation. When the proximity sensor 7 detects the maintenance personnel, the signal is transmitted to the control system, and the control system controls the 8 air supply ports on the No. 2 oxygen supply pipe located near the proximity sensor to open, so as to realize accurate oxygen supplementation within the working range of the maintenance personnel.

[0022] In addition, a manual opening mode is also provided in the present embodiment, which can be manually operated to open the air supply ports on the No. 1 oxygen supply pipe and the No. 2 oxygen supply pipe to ensure the safety of the workers in the water collection well.

[0023] In this embodiment, the oxygen supply device for the water collection well is installed by drilling holes near the manhole cover of the leaking water collection well, and the first and second fans are installed in the oxygen supply device for the water collection well. The fans in the box body are fixed by bolts. The first and second oxygen supply pipes are connected to the fan outlet at one end, and the air filter is connected to the air inlet at one end. The size of the air filter is designed and installed according to the size of the oxygen supply device for the water collection well. The size of the oxygen supply device body is 2000mm×3000mm×1000mm in length, width and height. The size of one side where the air filter is installed is 3000mm×1000mm. Two holes of 1200mm×800mm are opened on this side, which are air inlets. The filter is cut according to the size of the holes. The bottom surface of the oxygen supply device body is fixed by four M6 bolts with a diameter of 10mm, and the bottom of the box is fixed by channel steel. The channel steel is fixed and welded according to the size of the box, and then the box is fixed to the channel steel with bolts. The fan adopts a direct-drive motor fan with a voltage level of 380v. Each fan has a diameter of 1300mm and is fixed side by side inside the box. The air outlet of the fan corresponds to the air outlet pipe with a radius of 40mm. The air outlet pipe extends from the wellhead to the last ladder in the well. The two air outlet pipes are set at a distance of 400mm from the wellhead. The air outlet is opened 400mm downward according to the position of the first air outlet. The air outlet is opened to the horizontal position below the ladder of the water collection well. The air supply ports on the No. 1 oxygen supply pipe and the No. 2 oxygen supply pipe correspond horizontally. The proximity sensor is installed between the horizontal air supply ports on the No. 1 oxygen supply pipe and the No. 2 oxygen supply pipe. The remaining proximity sensors are set downward in sequence. The oxygen content sensor is set at the bottom of the ladder in the water collection well.

[0024] The above embodiment is only one of the preferred implementation modes of the present utility model and should not be used to limit the protection scope of the present utility model. Any changes or modifications that are made to the main design concept and spirit of the present utility model without any substantive significance, as long as the technical problems solved are still consistent with the present utility model, should be included in the protection scope of the present utility model.

Claims

1. A water collection well oxygen supply device, characterized in that: The invention comprises an oxygen supply device body (1) arranged outside a water collection well and capable of conveying air, a first oxygen supply pipe (5) and a second oxygen supply pipe (4) extending from the oxygen supply device body (1), the first oxygen supply pipe (5) and the second oxygen supply pipe (4) extending to the inside of the water collection well; and a plurality of air supply ports (6) are provided on the first oxygen supply pipe (5) and the second oxygen supply pipe (4).

2. The water collection well oxygen supply device according to claim 1, characterized in that: A No. 1 fan (2) and a No. 2 fan (3) are installed inside the oxygen supplementation device body (1); the air outlet of the No. 1 fan (2) is connected to the No. 1 oxygen supplementation pipe (5), and the air outlet of the No. 2 fan (3) is connected to the No. 2 oxygen supplementation pipe (4).

3. The water collection well oxygen supply device according to claim 2, characterized in that: The No. 1 oxygen supply pipe (5) and the No. 2 oxygen supply pipe (4) extend to the bottom of the water collection well and extend downward along both sides of the maintenance ladder respectively.

4. The water collection well oxygen supply device according to claim 3, characterized in that: The No. 1 oxygen supply pipe (5) and the No. 2 oxygen supply pipe (4) are evenly and separately provided with 16 air supply ports, and each of the air supply ports is equipped with a switch.

5. The water collection well oxygen supply device according to claim 4, characterized in that: It also includes a control system installed in the oxygen supply device body (1), and the switch on each air supply port is connected to the control system through a signal line; an oxygen content sensor (8) is installed at the lower end of the maintenance ladder inside the water collection well, and the oxygen content sensor (8) is connected to the control system through a signal line.

6. The water collection well oxygen supply device according to claim 5, characterized in that: It also comprises a plurality of proximity sensors (7) which are equally spaced vertically inside the water collection well, and the proximity sensors (7) are connected to the control system via signal lines.

7. The water collection well oxygen supply device according to claim 6, characterized in that: The number of the proximity sensors (7) is 16.

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