CN204405275U - Immersed tube sealing test system - Google Patents

Abstract

The utility model belongs to the technical field of sealing testing, and discloses an immersed tube sealing testing system, comprising: a water supply unit, a testing unit and a chamber to be tested; Filling with water; the test unit is arranged on the pipeline, and the test unit is used to test the flow rate of water in the pipeline; the chamber to be tested is located at the connection between the interconnected first immersed tube and the second immersed tube; the The first immersed tube and the second immersed tube are located on the inner wall of the immersed tube at the junction of the two. A groove is provided on the inner wall of the immersed tube, and a sealing tape is provided at the opening of the groove. The groove and the sealing tape enclose the chamber to be tested. The utility model is provided with an annular groove at the connection of adjacent immersed tubes, and the groove is in contact with the connection seam of the two immersed tubes. By testing the sealing of the annular groove, the test of the sealing of the connection of the immersed tubes is realized, and the test is easy. operate.

Description

Immersed Tube Seal Test System

technical field

The utility model relates to the technical field of sealing testing, in particular to an immersed tube sealing testing system.

Background technique

Immersed tubes are key structures in underwater tunnels, and the tightness of connections between immersed tubes is related to the tightness and safety of the entire tunnel. For pipelines with small diameters, gas or liquid can be directly injected into the pipelines for tightness testing; however, the immersed tube is the skeleton of an underwater tunnel, generally about 10 meters in height and more than 30 meters in width, and the immersed tube has a large cross-sectional area; and The installation of immersed tubes is carried out underwater, and the underwater pressure is relatively high. After sealing the adjacent immersed tubes, and then testing the tightness of the joints, the test operation is very difficult.

Utility model content

(1) Technical problems to be solved

The technical problem to be solved by the utility model is: the sectional area of the immersed tube is relatively large, and it is installed underwater, and the sealing test of the joint of the immersed tube is difficult after installation.

(2) Technical solution

In order to solve the above technical problems, the utility model provides an immersed tube sealing test system, including: a water supply unit, a test unit and a chamber to be tested; the water supply unit is connected to the chamber to be tested through a pipeline, and the water supply unit is used to inject Filling with water; the test unit is arranged on the pipeline, and the test unit is used to test the flow rate of water in the pipeline; the chamber to be tested is located at the connection between the interconnected first immersed tube and the second immersed tube; the The first immersed tube and the second immersed tube are located on the inner wall of the immersed tube at the junction of the two. A groove is provided on the inner wall of the immersed tube, and a sealing tape is provided at the opening of the groove. The groove and the sealing tape enclose the chamber to be tested.

Wherein, the groove is a closed-loop structure, and the sealing strip is provided with a water inlet hole and an exhaust hole, and the water supply unit communicates with the chamber to be tested through the water inlet hole.

Wherein, the water supply unit includes a pressure storage tank, the frequency conversion pump is used to provide the variable frequency pump with adjustable pressure water flow, and the pressure storage tank is used to stabilize the pressure of the water flow discharged from the frequency conversion pump.

Wherein, the test unit includes a flow sensor and a processor, the flow sensor is used to detect the change of the water flow in the pipeline, and feed back the detection result to the processor for processing.

Wherein, the processor is connected with a buzzer, and the processor is used to send instructions to the buzzer after the flow sensor detects a flow change; the buzzer is used to receive instructions from the processor, and Alert.

Wherein, the processor is connected with a display, and the display is used to display the flow value in the pipeline received by the processor.

Wherein, the detection unit is connected with a branch in parallel, and the branch is used to prevent the water flow from contacting the flow sensor during the water filling process.

(3) Beneficial effects

The above technical solution has the following advantages: the immersed tube sealing test system described in the utility model is provided with an annular groove at the junction of adjacent immersed tubes, and the groove is in contact with the connection seam of the two immersed tubes. By testing the sealing performance of the annular groove , to realize the test of the tightness of the junction of the immersed tube, and the test is easy to operate.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of the chamber to be measured described in the utility model;

FIG. 2 is a perspective view of FIG. 1 .

Wherein, 1. the first immersed tube; 2. the second immersed tube; 3. the groove; 4. the sealing tape; 41. the water inlet hole; 42. the exhaust hole.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

As shown in Figure 1-2, the utility model is an immersed tube sealing test system, including: a water supply unit, a test unit and a chamber to be tested; the water supply unit is connected to the chamber to be tested through a pipeline, and the water supply unit is used to inject Filling with water; the test unit is arranged on the pipeline, and the test unit is used to test the flow rate of water in the pipeline; the chamber to be tested is located at the connection between the interconnected first immersed tube 1 and the second immersed tube 2; the The first immersed tube 1 and the second immersed tube 2 are provided with a groove 3 on the inner wall of the immersed tube at the junction of the two, and the opening of the groove 3 is sealed by a sealing tape 4, and the groove 3 and the sealing tape 4 are enclosed. Describe the chamber to be tested. That is, by setting a groove 3 at the joint between the first immersed tube 1 and the second immersed tube 2, a cavity is left at the junction of the immersed tubes as the cavity to be measured. Due to the groove between the two immersed tubes 3 is sealed by the sealing tape 4, and the groove 3 is in contact with the seam of the immersed tube, so injecting water into the groove 3 can detect the sealing relationship between the joints of the two immersed tubes; Pressurized water, test whether the chamber to be tested is leaking under a certain pressure; if it leaks, the high-pressure water in the chamber to be tested will leak out from the joint of the immersed tube, and the detection unit can detect the flow change in the pipeline, then connect here The sealing performance is not up to standard.

Preferably, the two immersed tubes are spliced together, the second immersed tube 2 is spliced with the ends of the first immersed tube 1, and the groove 3 is formed by two grooves respectively arranged at the ends of the first immersed tube 1 and the second immersed tube 2. After the splicing of the two immersed tubes, a groove 3 with a closed-loop structure is formed, which together form the cavity to be tested. The sealing strip 4 arranged at the opening of the groove 3 is a waterstop, and the waterstop is sealed and connected to the opening of the groove 3 by screws. , in order to realize the connection with the water supply unit, a water inlet 41 and an air outlet 42 are provided on the sealing strip 4, the water supply unit communicates with the chamber to be measured through the water inlet 41, and the air outlet 42 is used for During the water filling process, the gas in the chamber to be tested and the pipeline is discharged to avoid affecting the detection effect. Preferably, the exhaust hole 42 is set at the highest point of the water stop when the immersed tube is installed, so as to exhaust the gas as much as possible.

The water supply unit includes a pressure storage tank, the frequency conversion pump is used to provide the variable frequency pump with adjustable pressure water flow, and the pressure storage tank is used to stabilize the pressure of the water flow discharged from the frequency conversion pump.

The test unit includes a flow sensor and a processor, the flow sensor is used to detect the change of the water flow in the pipeline, and feed back the detection result to the processor for processing.

The processor is connected with a buzzer, and the processor is used to send instructions to the buzzer after the flow sensor detects a flow change; the buzzer is used to receive instructions from the processor and send out an alarm .

The processor is connected with a display, and the display is used to display the flow value in the pipeline received by the processor. The operator can directly observe whether there is a flow change in the pipeline. Even if the buzzer is damaged and the alarm cannot be issued, the operator can Whether there is leakage in the cavity to be tested can be found in time to avoid detection errors.

The detection unit is connected in parallel with a branch circuit, and the branch circuit is used to prevent the water flow from contacting the flow sensor during the water filling process. In order to protect the flow sensor, water is allowed to flow into the chamber to be measured from the branch circuit during the water filling process without contacting the flow sensor. After the belt is filled with water and the water in the pipeline does not flow obviously, then close the branch circuit, connect the pipeline where the sensor to be tested is located, and start to detect the change of the flow rate.

As can be seen from the above embodiments, the utility model is provided with an annular groove 3 at the contact surface of adjacent immersed tubes, and the groove 3 is in contact with the entire seam of the immersed tube to ensure that the detection range is complete and avoid missed detection; The volume of the tube is large, and the small-sized groove 3 has little effect on the sealing of the immersed tube, and the sealing of the immersed tube will not fail due to the opening of the groove 3; 42. The purpose of filling the chamber to be tested with high-pressure water is realized, and no gas will remain in the chamber to be tested, so as to ensure the accuracy of the detection results; if the sealing tape 4 leaks, the flow sensor will detect the leakage in the pipeline. The change of the flow rate will send an alarm, and the change of flow rate will be displayed on the monitor in real time, which is convenient to remind the operator and ensure the normal detection.

The above is only the preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and replacements can also be made. And replacement should also be regarded as the protection scope of the present utility model.

Claims (7)

1. An immersed tube sealing test system is characterized in that, comprising: a water supply unit, a test unit and a cavity to be tested; the water supply unit is connected with the cavity to be tested by a pipeline, and the water supply unit is used for filling water in the cavity to be tested; the test unit Set on the pipeline, the test unit is used to test the flow rate of water in the pipeline; the chamber to be tested is located at the connection between the interconnected first immersed tube and the second immersed tube; The first immersed tube and the second immersed tube are provided with a groove on the inner wall of the immersed tube at the junction of the two, and a sealing tape is provided at the opening of the groove, and the groove and the sealing tape enclose the to-be-tested cavity. 2. The immersed tube sealing test system according to claim 1, wherein the groove is a closed-loop structure, the sealing strip is provided with a water inlet hole and an exhaust hole, and the water supply unit passes through the water inlet hole communicate with the chamber to be tested. 3. The immersed tube seal test system according to claim 1, wherein the water supply unit includes a pressure storage tank, the variable frequency pump is used to provide a variable frequency pump with adjustable pressure, and the pressure storage tank is used to stabilize the frequency conversion The pressure at which the pump discharges water. 4. The immersed tube sealing test system according to claim 1, wherein the test unit includes a flow sensor and a processor, and the flow sensor is used to detect the flow change of water in the pipeline, and the detection result is fed back to processor to process. 5. The immersed tube airtight test system according to claim 4, wherein the processor is connected with a buzzer, and the processor is used to buzz to the buzzer after the flow sensor detects a flow change. The buzzer is used to receive instructions from the processor and issue an alarm. 6. The immersed tube sealing test system according to claim 5, wherein the processor is connected with a display, and the display is used to display the flow value in the pipeline received by the processor. 7 . The immersed tube sealing test system according to claim 4 , wherein the detection unit is connected in parallel with a branch circuit, and the branch circuit is used to prevent the water flow from contacting the flow sensor during the water filling process. 8 .