Pipeline plugging device with drainage control valve

Abstract

The utility model provides a pipeline plugging device with a drainage control valve, which relates to the technical field of pipeline plugging and comprises a plugging air bag, an inflation and deflation nozzle and a drainage valve are arranged at the same end of the plugging air bag, a connecting pipeline is arranged in the plugging air bag, and the connecting pipeline is communicated with two ends of the plugging air bag along the axial direction of the plugging air bag. And the end part of the connecting pipeline is connected with the water escape valve. The device can improve the repeated utilization rate of water for the irrigation test and save water sources.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline plugging, in particular to a pipeline plugging device with a water discharge control valve. Background Art

[0002] The sewage and wastewater pipelines of engineering mechanical and electrical construction need to be tested with water, which requires the pipe section to be tested to be separated from other pipe sections of the system (temporary blocking). The conventional practice is to use pipe airbags to block the pipes. The airbag blockage is achieved by deflating the airbag to reduce its volume when draining water. However, when the airbag volume is reduced, the friction between the outer surface of the airbag and the inner wall of the pipe is reduced. The airbag will be pressed downward under the gravity of the plugging water. The space inside the pipe inspection port is small and the operator needs to put his hand into the inspection port to operate the deflation, which can easily cause injury to the hands and make it impossible to achieve safe water discharge operations. At the same time, the pressure test water will flow out of the inspection port, causing a waste of resources. Summary of the invention

[0003] In view of the above-mentioned prior art, the utility model proposes a pipeline plugging device with a water discharge control valve.

[0004] The utility model provides a pipeline plugging device with a water discharge control valve, comprising a plugging air bag, an air filling and discharging nozzle and a water discharge valve are arranged at the same end of the plugging air bag, a connecting pipe is arranged inside the plugging air bag, the connecting pipe connects the two ends of the plugging air bag along the axial direction of the plugging air bag, and the end of the connecting pipe is connected to the water discharge valve.

[0005] Preferably, when the blocking airbag is used for a vertical pipeline, the connecting pipeline is located in the inner middle part of the blocking airbag.

[0006] Preferably, when the blocking airbag is used for a horizontal pipeline, the connecting pipeline is located at the inner bottom of the blocking airbag.

[0007] Preferably, the inflation and deflation nozzle is connected to the air cylinder.

[0008] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides a pipeline plugging device with a water discharge control valve, which can solve the problem of poor water discharge safety and low water resource utilization rate in traditional construction using air bags for water filling tests, improve the efficiency of sewage and wastewater pipeline water filling tests, more reliably protect the safety of water filling test operators, improve the reuse rate of water used in water filling tests, and save water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of a pipeline plugging device with a water discharge control valve in an embodiment of the utility model.

[0010] Figure 2It is an application schematic diagram of a pipeline plugging device with a water discharge control valve in an embodiment of the utility model.

[0011] In the figure: 1. Sealing air bag; 2. Inflation and deflation nozzle; 3. Drain valve; 4. Connecting pipe; 5. Air cylinder. DETAILED DESCRIPTION

[0012] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0013] Example: Figure 1 A pipeline plugging device with a water discharge control valve is shown, comprising a plugging airbag 1, an inflation and deflation nozzle 2 and a water discharge valve 3 are arranged at the same end of the plugging airbag 1, a connecting pipe 4 is arranged inside the plugging airbag 1, the connecting pipe 4 connects the two ends of the plugging airbag 1 along the axial direction of the plugging airbag 1, and the end of the connecting pipe 4 is connected to the water discharge valve 3.

[0014] like Figure 2 As shown, taking the blocking airbag for a vertical pipeline as an example, the connecting pipe 4 is arranged in the inner middle part of the blocking airbag 1. After the blocking airbag 1 is placed in the vertical pipeline, the inflation and deflation nozzle 2 is connected to the air cylinder 5. Without reducing the pressure of the airbag, the switch of the drain valve 3 can be controlled to achieve safe water discharge or lead water to other test pipeline sections to achieve the purpose of water reuse.

[0015] The above are only implementation methods of the present utility model, and are not intended to limit the patent scope of the present utility model. Any equivalent structure made using the contents of the specification and drawings of the present utility model, directly or indirectly used in other related technical fields, are also within the patent protection scope of the present utility model.

Claims

1. A pipeline plugging device with a water discharge control valve, characterized in that: It includes a blocking airbag, the same end of which is provided with an inflation and deflation nozzle and a drain valve, a connecting pipe is provided inside the blocking airbag, the connecting pipe connects the two ends of the blocking airbag along the axial direction of the blocking airbag, and the end of the connecting pipe is connected to the drain valve.

2. The pipeline plugging device with a water discharge control valve according to claim 1, characterized in that: When the blocking airbag is used for a vertical pipeline, the connecting pipeline is located in the inner middle part of the blocking airbag.

3. The pipeline plugging device with a water discharge control valve according to claim 1 or 2, characterized in that: When the blocking airbag is used for a horizontal pipeline, the connecting pipeline is located at the inner bottom of the blocking airbag.

4. The pipeline plugging device with a water discharge control valve according to claim 1 or 2, characterized in that: The gas charging and discharging nozzle is connected with the gas cylinder.

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