Boiler leakage detection device

Abstract

The utility model relates to a boiler leakage detection device which comprises a detection tank, a vacuum pump, a flue gas hygrograph, a programmable logic controller and a relay, a probe of the flue gas hygrograph is installed in the detection tank from the top of the detection tank, and the bottom of the detection tank is communicated with an air inlet of the vacuum pump through an exhaust pipe provided with a first electromagnetic valve; n air inlet nozzles are arranged on the tank wall of the detection tank, each air inlet nozzle is connected with a second electromagnetic valve through a first pipeline, each second electromagnetic valve is connected with a sampling cover through a second pipeline, one sampling cover is installed at the position away from the boiler, and the other N-1 sampling covers are installed at leakage risk points on the boiler. The boiler leakage detection device has the advantages that the leakage risk points on the boiler are sampled and detected circularly, leakage detection can be conducted on the multiple leakage risk points on the boiler only through one set of leakage detection equipment, a data collector does not need to be arranged, and the boiler leakage detection cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of boiler detection technology, and in particular to a boiler leak detection device. Background Technology

[0002] A boiler is a device that uses various fuels, electricity, or other energy sources to heat a contained liquid to certain parameters and then provides heat energy by outputting a medium. Boilers are generally constructed by welding steel plates and various pipe fittings, and are also equipped with various sensors, instruments, and valves. Therefore, boilers are prone to leaks at welds and installation connections during use. Currently, leak detection in boilers requires installing a leak detection device at each potential leak point, and then collecting and summarizing the data from each leak detection device using multi-channel data acquisition equipment. Although the technology is mature, the large number of potential leak points on boilers results in a large number of leak detection devices being used, and the cost is high when combined with multi-channel data acquisition equipment. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned problems in the existing technology and provide a boiler leakage detection device.

[0004] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0005] A boiler leak detection device includes a detection tank, a vacuum pump, a flue gas hygrometer, a programmable logic controller (PLC), and a relay. The probe of the flue gas hygrometer is installed inside the detection tank from the top. The bottom of the detection tank is connected to the air inlet of the vacuum pump via a suction pipe equipped with a first solenoid valve. N air inlets are provided on the tank wall. Each air inlet is connected to a second solenoid valve via a first pipe. Each second solenoid valve is connected to a sampling hood via a second pipe. One sampling hood is installed at a location away from the boiler, and the remaining N-1 sampling hoods are installed at leak risk points on the boiler. The signal output terminal of the PLC is connected to the input circuits of the first solenoid valve, the second solenoid valve, and the relay via cables. The output circuit of the relay is connected to the vacuum pump via cables.

[0006] Furthermore, it also includes a mounting base for supporting the detection tank and the second solenoid valve. The mounting base includes an annular mounting plate, multiple uprights arranged in a circular array, and three support legs arranged in a circular array. The support legs are mounted on the bottom end of the mounting plate. The detection tank is screwed to the top center of the mounting plate, and the uprights are screwed to the top of the mounting plate. Each upright is provided with multiple solenoid valve mounting holes evenly distributed from bottom to top, and one second solenoid valve is installed in each solenoid valve mounting hole.

[0007] The bottom of the testing tank is provided with an air extraction pipe interface, which passes through the through hole in the center of the mounting plate from top to bottom, and one end of the air extraction pipe is installed on the air extraction pipe interface.

[0008] The sampling cover includes a cylindrical connecting nozzle, a support tube, and a flared cover body. The support tube is fixed between the connecting nozzle and the cover body, and a rectangular frame-shaped installation handle is provided at the bottom of the support tube.

[0009] Among them, N air inlets are arranged in a circular array on the detection tank.

[0010] The first solenoid valve and the second solenoid valve are both direct-acting normally closed two-way solenoid valves.

[0011] The outer sides of the first pipe, the second pipe, and the testing tank are all provided with insulation layers.

[0012] The beneficial effects of this utility model are: by using a vacuum pump, a first solenoid valve, a detection tank, a first pipeline, a second solenoid valve, a second pipeline, and a sampling hood in a coordinated manner to sample and detect leakage risk points on the boiler, only one set of leakage detection equipment is needed to detect multiple leakage risk points on the boiler, and no data acquisition device is required, thus reducing the cost of boiler leakage detection. Attached Figure Description

[0013] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0014] Figure 1 This is a first-view structural schematic diagram of the boiler leakage detection device in this utility model;

[0015] Figure 2 This is a second-view structural schematic diagram of the boiler leakage detection device in this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the detection tank in this utility model;

[0017] Figure 4 This is a schematic diagram of the mounting base in this utility model;

[0018] Figure 5 This is a schematic diagram of the sampling cover in this utility model;

[0019] The following are the labels in the diagram: Detection tank 1, air inlet 101, extraction pipe interface 102, vacuum pump 2, flue gas humidity meter 3, probe 301, programmable logic controller 4, relay 5, first solenoid valve 6, extraction pipe 7, first pipeline 8, second solenoid valve 9, second pipeline 10, sampling cover 11, connecting nozzle 1101, support pipe 1102, cover body 1103, mounting handle 1104, mounting base 12, mounting plate 1201, stand 1202, support leg 1203, solenoid valve mounting hole 1204. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] like Figures 1 to 5 As shown, a boiler leak detection device includes a detection tank 1, a vacuum pump 2, a flue gas humidity meter 3, a programmable logic controller 4, a relay 5, and a mounting base 12 for supporting the detection tank 1 and a second solenoid valve 9. The probe 301 of the flue gas humidity meter 3 is installed into the detection tank 1 from the top of the detection tank 1.

[0022] Mounting base 12 includes an annular mounting plate 1201, multiple uprights 1202 arranged in a circular array, and three support legs 1203 arranged in a circular array. The support legs 1203 are mounted on the bottom end of the mounting plate 1201. The detection tank 1 is mounted on the top center of the mounting plate 1201 with screws. The uprights 1202 are mounted on the top end of the mounting plate 1201 with screws. Each upright 1202 is provided with multiple solenoid valve mounting holes 1204 evenly distributed from bottom to top. A second solenoid valve 9 is installed in each solenoid valve mounting hole 1204.

[0023] The bottom of the test tank 1 is connected to the air inlet of the vacuum pump 2 through the air extraction pipe 7, which is equipped with the first solenoid valve 6. Specifically, the bottom of the test tank 1 is provided with an air extraction pipe interface 102, which passes through the through hole in the center of the mounting plate 1201 from top to bottom, and one end of the air extraction pipe 7 is installed on the air extraction pipe interface 102.

[0024] The tank wall of the detection tank 1 is provided with N air inlets 101 arranged in a circular array. Each air inlet 101 is connected to a second solenoid valve 9 through a first pipe 8. Each second solenoid valve 9 is connected to a sampling hood 11 through a second pipe 10. One sampling hood 11 is installed in a position away from the boiler, and the remaining N-1 sampling hoods 11 are installed at the leakage risk points on the boiler.

[0025] The sampling cover 11 includes a cylindrical connecting nozzle 1101, a support tube 1102, and a trumpet-shaped cover 1103. The support tube 1102 is fixed between the connecting nozzle 1101 and the cover 1103, and a rectangular frame-shaped installation handle 1104 is provided at the bottom of the support tube 1102.

[0026] The signal output terminals of the programmable logic controller 4 are connected to the input circuits of the first solenoid valve 6, the second solenoid valve 9, and the relay 5 via cables, respectively. The output circuit of the relay 5 is connected to the vacuum pump 2 via cables.

[0027] Both the first solenoid valve 6 and the second solenoid valve 9 are direct-acting normally closed two-way solenoid valves.

[0028] To prevent condensation of the collected gas samples in the first pipe 8, the second pipe 10, and the detection tank 1 due to temperature drop, insulation layers are provided on the outside of the first pipe 8, the second pipe 10, and the detection tank 1.

[0029] Before each leak risk point is detected, the second solenoid valve and vacuum pump connected to the sampling hood located away from the boiler are opened simultaneously. The vacuum pump uses air from the location away from the boiler to clean the detection tank. After evacuation for S seconds, the second solenoid valve and vacuum pump connected to the sampling hood located away from the boiler are closed simultaneously. The humidity of the air at the location away from the boiler is measured using a flue gas humidity meter. Then, the vacuum pump is turned on to evacuate the detection tank.

[0030] When detecting leakage risk points, open the second solenoid valve connected to the sampling hood of the leakage risk point that needs to be sampled. Use the pressure difference between the inside and outside of the detection tank to draw the gas sample from the leakage risk point into the detection tank. Then use a flue gas humidity meter to detect the air humidity at the location away from the boiler.

[0031] By using a vacuum pump, a first solenoid valve, a detection tank, a first pipeline, a second solenoid valve, a second pipeline, and a sampling hood in a coordinated manner, leakage risk points on the boiler can be sampled and detected. Only one set of leakage detection equipment is needed to detect multiple leakage risk points on the boiler, and no data acquisition device is required, thus reducing the cost of boiler leakage detection.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A boiler leak detection apparatus, characterised in that: The device comprises a detection tank, a vacuum pump, a flue gas humidity meter, a programmable logic controller, and a relay, a probe of the flue gas humidity meter is installed into the detection tank from the top of the detection tank, a bottom of the detection tank is connected with an air inlet of the vacuum pump through an air extraction pipe provided with a first electromagnetic valve; N air inlets are arranged on a tank wall of the detection tank, each air inlet is connected with a second electromagnetic valve through a first pipeline, each second electromagnetic valve is connected with a sampling cover through a second pipeline, one sampling cover is installed at a position far from the boiler, and the remaining N-1 sampling covers are installed at leakage risk points on the boiler; signal output ends of the programmable logic controller are connected with the first electromagnetic valve, the second electromagnetic valve, and an input loop of the relay through cables, and an output loop of the relay is connected with the vacuum pump through a cable.

2. The boiler leak detection apparatus of claim 1, wherein: The device further comprises a mounting seat for supporting the detection tank and the second electromagnetic valves, the mounting seat comprises a circular mounting plate, a plurality of stands arranged in a ring array, and three support legs arranged in a ring array, the support legs are installed at a bottom end of the mounting plate, the detection tank is installed at a middle part of a top end of the mounting plate by screws, the stands are installed at the top end of the mounting plate by screws, a plurality of electromagnetic valve mounting holes are arranged on each stand and are uniformly distributed from bottom to top, and one second electromagnetic valve is installed in each electromagnetic valve mounting hole.

3. A boiler leak detection apparatus according to claim 2, characterised in that: An air extraction pipe interface is arranged at the bottom of the detection tank, the air extraction pipe interface penetrates a through hole in the center of the mounting plate from top to bottom, and one end of the air extraction pipe is installed on the air extraction pipe interface.

4. The boiler leak detection apparatus of claim 1, wherein: The sampling cover comprises a circular pipe-shaped connecting nozzle, a support pipe, and a horn-shaped cover body, the support pipe is fixedly connected between the connecting nozzle and the cover body, and a rectangular frame-shaped mounting handle is arranged at a bottom of the support pipe.

5. The boiler leak detection apparatus of claim 1, wherein: The N air inlets are arranged on the detection tank in a ring array.

6. The boiler leak detection apparatus of claim 1, wherein: The first electromagnetic valve and the second electromagnetic valve are both direct-acting normally closed electromagnetic two-way valves.

7. The boiler leak detection apparatus of claim 1, wherein: The first pipeline, the second pipeline, and the detection tank are all provided with an outer heat preservation layer.

Images