Waterproof test device and method for automatically identifying leakage of shield tunnel sealing gasket

Abstract

The application provides a waterproof test device and method for automatically identifying water leakage of a shield tunnel sealing gasket, which comprises a C-shaped workbench, a sealing gasket clamping plate mechanism for forming a joint with a preset shape to accommodate a sealing gasket to be tested, a displacement loading mechanism for applying a predetermined load and lateral displacement to the sealing gasket clamping plate mechanism, a water pressure loading mechanism for providing a loading water pressure to the sealing gasket clamping plate mechanism, a water leakage identification mechanism for automatically identifying the water leakage of the sealing gasket, and a control mechanism connected with the displacement loading mechanism, the water leakage identification mechanism and the water pressure loading mechanism respectively. The application can automatically identify the water leakage of the sealing gasket and improve the accuracy of the waterproof test result.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shield tunnel joint waterproof test engineering, in particular to a waterproof test device and method for automatically identifying shield tunnel sealing gasket water leakage. BACKGROUND

[0002] Shield tunnel segments are mainly prefabricated in factories and then transported to the site for assembly. There are a large number of longitudinal and ring joints between the segments, and "straight joints" and "T-shaped joints" are formed between the joints. At present, with the continuous development of shield technology, the requirements for the waterproof performance of the segments are also increasing. How to better test and study the waterproof performance of the shield tunnel sealing gasket is attracting more and more attention.

[0003] The existing shield tunnel sealing gasket waterproof performance test mainly determines whether the sealing gasket leaks or not through the naked eye observation of the technical personnel. The determination standard has certain subjective factors, and the automatic identification function has not been realized. Moreover, the existing test device cannot automatically take pictures and store them after determining the water leakage, and has low efficiency. SUMMARY

[0004] In view of the defects in the prior art, the present application aims to provide a waterproof test device and method for automatically identifying shield tunnel sealing gasket water leakage.

[0005] According to one aspect of the present application, a waterproof test device for automatically identifying shield tunnel sealing gasket water leakage is provided, which comprises:

[0006] A C-shaped workbench having a C-shaped opening;

[0007] A sealing gasket clamping plate mechanism arranged in the C-shaped opening, the sealing gasket clamping plate mechanism being used to form a joint of a predetermined shape to accommodate the sealing gasket to be tested;

[0008] A displacement loading mechanism for applying a predetermined load and lateral displacement to the sealing gasket clamping plate mechanism;

[0009] A water pressure loading mechanism for providing a loading water pressure to the sealing gasket clamping plate mechanism;

[0010] A water leakage identification mechanism for automatically identifying the water leakage of the sealing gasket;

[0011] A control mechanism connected to the displacement loading mechanism, the water leakage identification mechanism and the water pressure loading mechanism, respectively.

[0012] Further, the water leakage identification mechanism comprises:

[0013] An industrial camera above the joint, the industrial camera acquires images of the joint of the gasket clamp mechanism at preset time intervals;

[0014] An identification module, which identifies gasket water leakage from the images;

[0015] A storage module, which stores images corresponding to gasket water leakage according to the identification result of the identification module.

[0016] Further, the number of the industrial cameras is four, the four industrial cameras are uniformly distributed above the joint, and the camera visual angle of the four industrial cameras covers the joint.

[0017] Further, when the similarity of the images to a preset image is less than a preset threshold, it is determined that water leakage occurs at the joint.

[0018] Further, the gasket clamp mechanism comprises a top cover plate and two symmetrical T-shaped side plates, the top cover plate covers the top of the T-shaped side plates; the side formed by the top cover plate and the two T-shaped side plates forms a T-shaped joint, and the top formed by the top cover plate and the two T-shaped side plates forms a straight joint; the mutually contacting wall surfaces of the top cover plate and the T-shaped side plates are provided with grooves for loading the gasket to be tested.

[0019] Further, the displacement loading mechanism comprises:

[0020] A top loading mechanism located at the top of the C-shaped opening, for applying a predetermined load to the top cover plate;

[0021] A lateral loading mechanism fixed on the C-shaped workbench, for applying a preset misalignment amount and opening amount to the T-shaped side plates.

[0022] Further, the top loading mechanism comprises:

[0023] 4 top oil cylinders uniformly distributed at the top of the C-shaped opening;

[0024] A pad plate arranged below the top oil cylinders and connected with the 4 top oil cylinders respectively.

[0025] Further, the lateral loading mechanism comprises:

[0026] A misalignment amount adjusting oil cylinder, the force of the misalignment amount adjusting oil cylinder is applied to one of the T-shaped side plates, so that the two T-shaped side plates produce misalignment displacement with a preset misalignment amount;

[0027] An opening amount adjusting oil cylinder, the force of the opening amount adjusting oil cylinder is applied to the side of the T-shaped side plate, so that the two T-shaped side plates are pressed to meet the preset opening amount.

[0028] According to another aspect of the present application, there is provided a waterproof test method for automatically identifying water leakage of a shield tunnel sealing gasket, which is implemented by using the waterproof test device for automatically identifying water leakage of a shield tunnel sealing gasket described above, and the method comprises:

[0029] pasting the sealing gasket to be tested in the joint of the sealing gasket clamping mechanism;

[0030] applying a predetermined load and lateral displacement to the sealing gasket clamping mechanism by the displacement loading mechanism;

[0031] gradually loading to a predetermined water pressure by the water pressure loading mechanism, automatically identifying the water leakage of the sealing gasket during the water pressure loading process by the water leakage identifying mechanism, and obtaining the waterproof performance parameters of the sealing gasket.

[0032] Further, the automatically identifying the water leakage of the sealing gasket during the water pressure loading process by the water leakage identifying mechanism comprises:

[0033] acquiring images of the joint of the sealing gasket clamping mechanism at preset time intervals;

[0034] when the similarity of the images to the preset images is less than a preset threshold, determining that water leakage occurs at the joint.

[0035] Compared with the prior art, the present application has at least one of the following beneficial effects:

[0036] The waterproof test device and method provided by the present application can realize the automatic identification of water leakage of the sealing gasket by setting the water leakage identifying mechanism on the segment joint waterproof test platform, effectively reduce the influence of human subjective factors, improve the accuracy of the waterproof test results, and greatly reduce the workload of the test personnel. BRIEF DESCRIPTION OF DRAWINGS

[0037] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the attached drawings:

[0038] Fig. 1 Fig. 1 is a perspective view of a waterproof test device for automatically identifying water leakage of a shield tunnel sealing gasket according to an embodiment of the present application;

[0039] Fig. 2 Fig. 2 is a side view of the waterproof test device for automatically identifying water leakage of a shield tunnel sealing gasket according to an embodiment of the present application;

[0040] Fig. 3 Fig. 3 is a front view of the waterproof test device for automatically identifying water leakage of a shield tunnel sealing gasket according to an embodiment of the present application;

[0041] In the figure: 1 is a C-shaped workbench, 2 is a sealing gasket clamping plate mechanism, 21 is a T-shaped side plate, 22 is a top cover plate, 3 is a top loading mechanism, 31 is a top oil cylinder, 32 is a gasket plate, 41 is a lateral support, 42 is a lateral pushing rod, 43 is a forward support, 44 is an oil cylinder for adjusting the opening amount, 45 is an oil cylinder for adjusting the misalignment amount, 5 is a water pressure loading mechanism, 6 is an industrial camera, 7 is a control mechanism, and 8 is an angle plate. DETAILED DESCRIPTION

[0042] The application will be described in detail below with specific embodiments. The following examples will help those skilled in the art to further understand the application, but do not limit the application in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the application. These are within the scope of the present application.

[0043] The embodiment of the application provides a waterproof test device for automatically identifying water leakage of a sealing gasket of a shield tunnel. Figs. 1-3 The device comprises a C-shaped workbench 1, a sealing gasket clamping plate mechanism 2, a displacement loading mechanism, a water pressure loading mechanism 5, a water leakage identification mechanism, and a control mechanism 7. The C-shaped workbench 1 has a C-shaped opening. The sealing gasket clamping plate mechanism 2 is arranged in the C-shaped opening. The sealing gasket clamping plate mechanism 2 is used to form a joint of a preset shape to accommodate a sealing gasket to be tested. Specifically, grooves for pasting the sealing gasket to be tested are arranged on both sides of the joint. The displacement loading mechanism is used to apply a predetermined load and lateral displacement to the sealing gasket clamping plate mechanism 2. The water pressure loading mechanism 5 is used to provide a loading water pressure for the sealing gasket clamping plate mechanism 2. The water leakage identification mechanism is used to automatically identify the water leakage of the sealing gasket. The control mechanism 7 is connected with the displacement loading mechanism, the water leakage identification mechanism, and the water pressure loading mechanism 5, respectively.

[0044] In the above embodiment, by arranging the water leakage identification mechanism on the segment joint waterproof test platform, the automatic identification and judgment of the water leakage of the sealing gasket of the segment joint of the shield tunnel can be realized in the waterproof test of the segment joint of the shield tunnel. The influence of human subjective factors is effectively reduced, the accuracy of the waterproof test result is improved, and the workload of the test personnel is greatly reduced.

[0045] In some embodiments, the water leakage identification mechanism comprises an industrial camera 6 located above the joint, preferably four industrial cameras 6 evenly distributed above the joint, the camera view of the four industrial cameras 6 covering the joint, and the images of the joint of the gasket clamp mechanism 2 are acquired by the industrial cameras 6 at preset time intervals, for example, the industrial cameras 6 automatically take pictures every certain time interval, such as 10s, during the test, to obtain multiple images of the joint. The water leakage identification mechanism further comprises a storage module and an identification module, the storage module is used to store the images of the joint, and the identification module identifies the water leakage condition of the gasket according to the images. Specifically, the image obtained after the gasket is loaded into the joint is taken as a preset image, and the image under the condition of water leakage at the joint can be compared with the preset image. When the similarity is less than a preset threshold, it indicates that the similarity is low, and it can be judged that water leakage has occurred at the joint. If water leakage is identified at the joint, the test is terminated, and if no water leakage is identified, the test continues.

[0046] In the above embodiment, the industrial camera 6 acquires images of the joint, such as the slit and the T-shaped slit, of the gasket clamp mechanism 2 at preset time intervals, the storage module automatically stores the images of the joint, and the identification module identifies the water leakage condition of the gasket according to the images, so that more reliable test data can be obtained, and the test results can be easily arranged.

[0047] The waterproof test device in the above embodiment can automatically take pictures and store them when water leakage occurs in the gasket, so that more reliable test data can be obtained, and the test results can be easily arranged.

[0048] In some embodiments, the C-shaped workbench 1 is welded by a steel plate, the lower middle part of the C-shaped opening of the C-shaped workbench 1 provides a gasket test operation platform, and the upper middle part provides a counterforce for the loading of the top oil cylinder 31. The gasket clamp mechanism 2 comprises a top cover plate 22 and two symmetrical T-shaped side plates 21, and the top cover plate 22 covers the upper part of the T-shaped side plates 21; the side formed by the top cover plate 22 and the two T-shaped side plates 21 forms a T-shaped slit, and the top surface formed by the top cover plate 22 and the two T-shaped side plates 21 forms a slit; grooves for loading the gasket to be tested are provided on the wall surfaces of the top cover plate 22 and the T-shaped side plates 21 that contact each other. The displacement loading mechanism comprises a top loading mechanism 3 and a lateral loading mechanism, the top loading mechanism 3 is located at the top of the C-shaped opening and is used to apply a predetermined load to the top cover plate 22, and the lateral loading mechanism is fixed on the C-shaped workbench 1 and is used to apply a set displacement (misalignment amount and opening amount) to the T-shaped side plate 21.

[0049] In some embodiments, the top loading mechanism 3 comprises top oil cylinders 31 and a pad plate 32, the number of the top oil cylinders 31 is 4, and the 4 top oil cylinders 31 are evenly distributed on the top of the C-shaped opening; the top oil cylinders 31 are fixed on the top of the C-shaped opening by welding, and the pad plate 32 is arranged below the top oil cylinders 31 and connected with the 4 top oil cylinders 31 respectively, and the pad plate 32 is used for applying a wedge-shaped deformation amount to the top cover plate 22. The 4 industrial cameras 6 are respectively fixed at the middle positions of the 4 sides of the pad plate 32, so as to realize full coverage of the camera visual angle to the joint. The three plates of the top cover plate 22 and the T-shaped side plate 21 are all made of steel, and grooves with corresponding depth and width are engraved in the inside to facilitate the pasting of sealing pads, and meanwhile, the top cover plate 22 is reserved with a water inlet hole and an air outlet hole. In order to further enhance the adaptability of the test device, one or two grooves and different groove spacings can be arranged in the inside of the top cover plate 22 and the T-shaped side plate 21, so as to simulate the actual pipe piece setting of single sealing pad and multiple sealing pads, and different groove spacings can simulate the setting spacings of the actual pipe piece setting of multiple sealing pads.

[0050] In some embodiments, the lateral displacement cyclic loading mechanism comprises an adjustment stagger amount oil cylinder 45 and an adjustment opening amount oil cylinder 44, the adjustment stagger amount oil cylinder 45 is arranged at one end of the T-shaped side plate 21 in the length direction, and the acting force of the adjustment stagger amount oil cylinder 45 is applied to the T-shaped side plate 21 on one side, so that the two T-shaped side plates 21 generate stagger displacement with a preset stagger amount; the adjustment opening amount oil cylinder 44 is arranged at one end of the T-shaped side plate 21 in the width direction close to the side wall of the C-shaped opening, and the adjustment opening amount oil cylinder 44 is arranged perpendicularly to the adjustment stagger amount oil cylinder 45, and the acting force of the adjustment opening amount oil cylinder 44 is applied to the side of the T-shaped side plate 21, so that the two T-shaped side plates 21 are pressed to meet the set opening amount.

[0051] Further, the lateral displacement cyclic loading mechanism further comprises a forward support 43 and a lateral support 41, wherein: the forward support 43 is arranged outside the T-shaped side plate 21 away from the side wall of the C-shaped opening; and the lateral support 41 is arranged between the adjustment stagger amount oil cylinder 45 and the T-shaped side plate 21.

[0052] It should be noted that in other embodiments, other structures of sealing pad clamping plate mechanisms or joint forms can be adopted according to actual needs, and displacement loading mechanisms can also adopt other structures or apply other types of loads, and the embodiments of the present application do not make specific limitations in this regard.

[0053] In some embodiments, a water inlet hole is arranged on the top cover plate 22, and the water pressure loading mechanism 5 comprises a water pressure pipeline and a water pressure oil cylinder, one end of the water pressure pipeline is communicated with the water inlet hole; the water pressure oil cylinder is connected with the other end of the water pressure pipeline, and is used for providing loading water pressure, the water pressure oil cylinder is connected with the control mechanism 7, and can automatically load water pressure, so as to facilitate the test operation.

[0054] In some embodiments, the device further comprises a sliding rail (not shown in the figure) and a lateral pushing rod 42, the sliding rail is arranged at the bottom of the C-shaped opening, the sealing gasket clamping plate mechanism 2 is located on the sliding rail, and the sealing gasket clamping plate mechanism 2 is moved through the sliding rail, thereby facilitating operation; one end of the lateral pushing rod 42 is connected with the sealing gasket clamping plate mechanism 2, and the sealing gasket clamping plate mechanism 2 is pushed to move to below the top loading mechanism 3 along the sliding rail. After the top cover plate 22 and the two T-shaped side plates 21 are assembled to form the sealing gasket clamping plate mechanism 2, the sealing gasket clamping plate mechanism 2 can be pushed into the C-shaped workbench 1 along the sliding rail through the lateral pushing rod 42.

[0055] In some embodiments, a plurality of angle plates 8 for reinforcement are arranged at the lower part of the C-shaped workbench 1 to maintain the stability of the C-shaped workbench 1.

[0056] In the above embodiments, each test parameter can be set through the control mechanism 7, so that automatic operation is realized, errors caused by manual operation are avoided, and more reliable test data are obtained.

[0057] Another embodiment of the present application provides a waterproof test method for automatically identifying water leakage of a sealing gasket of a shield tunnel, which is realized by using the waterproof test device for automatically identifying water leakage of a sealing gasket of a shield tunnel. Figs. 1-3 The method comprises the following steps:

[0058] S1, the sealing gasket to be tested is pasted in the joint of the sealing gasket clamping plate mechanism 2;

[0059] S2, a predetermined load and a lateral displacement are applied to the sealing gasket clamping plate mechanism 2 through the displacement loading mechanism;

[0060] S3, the sealing gasket clamping plate mechanism 2 is loaded to a predetermined water pressure through the water pressure loading mechanism 5, the water leakage of the sealing gasket during the water pressure loading process is automatically identified through the water leakage identification mechanism, and the waterproof performance parameter of the sealing gasket is obtained.

[0061] In some embodiments, the water leakage of the sealing gasket during the water pressure loading process is automatically identified through the water leakage identification mechanism, which comprises: an industrial camera acquires images of the joint of the sealing gasket clamping plate mechanism 2 at a preset time interval (for example, 10 s); and a recognition module determines whether water leakage occurs according to the similarity between the images and a preset image, and it is determined that water leakage occurs at the joint when the similarity between the images and the preset image is less than a preset threshold.

[0062] In a specific embodiment, the waterproof test method for automatically identifying water leakage of a sealing gasket of a shield tunnel comprises the following steps: Figs. 1-3

[0063] S1, the sealing gasket to be tested is pasted in the joint of the sealing gasket clamping plate mechanism 2; ​

[0064] S2, adjust the lateral two control oil cylinders, respectively, to two T-shaped side plates 21 exert the opening amount and the misalignment amount, and use vernier caliper to review the opening amount and the misalignment amount around four sides, after meeting the requirements, the adjustment work of the opening amount and the misalignment amount is completed; during a single test, the opening amount and the misalignment amount remain unchanged;

[0065] S3, the top oil cylinder 31 is lowered, and a predetermined load is exerted;

[0066] S4, connect the pipeline of the water pressure loading mechanism 5 with the water inlet valve, operate the electric, start the water pressure step-by-step loading, the precision industrial camera 6 acquires the image at the joint according to the preset time interval, the storage module stores the image in real time, the identification module automatically identifies the water leakage condition of the sealing gasket according to the similarity of the image and the preset image, and obtains the waterproof performance parameter of the sealing gasket.

[0067] The waterproof test device and method provided by the above embodiments of the present application can realize automatic identification of the water leakage of the sealing gasket, effectively reduce the influence of human subjective factors, improve the accuracy of the waterproof test result, and greatly reduce the workload of the test personnel.

[0068] The specific embodiments of the present application are described above. It should be understood that the present application is not limited to the above specific embodiments, and various modifications or changes can be made by those skilled in the art within the scope of the claims, which does not affect the essential content of the present application. The above preferred features can be used in combination as long as they do not conflict with each other.

Claims

1. A waterproof test device for automatically identifying water leakage of a shield tunnel gasket, characterized by, The utility model relates to a C-shaped workbench, a sealing gasket clamping plate mechanism, a displacement loading mechanism, a water pressure loading mechanism, a leakage water identification mechanism and a control mechanism. The sealing gasket clamping plate mechanism is arranged in the C-shaped opening and is used to form a joint of a preset shape to accommodate a sealing gasket to be tested. The displacement loading mechanism is used to apply a predetermined load and lateral displacement to the sealing gasket clamping plate mechanism. The water pressure loading mechanism is used to provide a loading water pressure to the sealing gasket clamping plate mechanism. The leakage water identification mechanism is used to automatically identify the leakage water condition of the sealing gasket. The control mechanism is connected to the displacement loading mechanism, the leakage water identification mechanism and the water pressure loading mechanism, respectively. The sealing gasket clamping plate mechanism comprises a top cover plate and two symmetrical T-shaped side plates, the top cover plate is arranged above the T-shaped side plates, the side surface formed by the top cover plate and the two T-shaped side plates forms a T-shaped joint, the top surface formed by the top cover plate and the two T-shaped side plates forms a straight joint, and grooves for accommodating the sealing gasket to be tested are arranged on the mutually contacting wall surfaces of the top cover plate and the T-shaped side plates. The displacement loading mechanism comprises a top loading mechanism and a lateral loading mechanism. The top loading mechanism is arranged at the top of the C-shaped opening and is used to apply a predetermined load to the top cover plate. The lateral loading mechanism is fixed to the C-shaped workbench and is used to apply a preset misalignment amount and opening amount to the T-shaped side plates. The lateral loading mechanism comprises a misalignment amount adjusting oil cylinder and an opening amount adjusting oil cylinder. The misalignment amount adjusting oil cylinder applies a force to one of the T-shaped side plates to cause the two T-shaped side plates to produce a misalignment displacement of a preset misalignment amount. The opening amount adjusting oil cylinder applies a force to the side surface of the T-shaped side plates to cause the two T-shaped side plates to be pressed to meet a preset opening amount. The leakage water identification mechanism comprises an industrial camera and a storage module.

2. The waterproof test device for automatically identifying leakage of a shield tunnel sealing gasket according to claim 1, characterized in that, The industrial camera is arranged above the joint and acquires images of the joint of the sealing gasket clamping plate mechanism at a preset time interval. The storage module is used to store the images. The identification module identifies the leakage water condition of the sealing gasket according to the images. The number of the industrial cameras is four, the four industrial cameras are uniformly distributed above the joint, and the camera view angles of the four industrial cameras cover the joint.

3. The waterproof test device for automatically identifying leakage of a shield tunnel sealing gasket according to claim 2, characterized in that, When the similarity between the images and a preset image is less than a preset threshold, it is determined that leakage water occurs at the joint.

4. The waterproof test device for automatically identifying leakage of a shield tunnel sealing gasket according to claim 2, characterized in that, The top loading mechanism comprises four top oil cylinders and a pad plate.

5. The waterproof test device for automatically identifying leakage of a shield tunnel sealing gasket according to claim 1, characterized in that, The four top oil cylinders are uniformly distributed at the top of the C-shaped opening. The pad plate is arranged below the top oil cylinders and is connected to the four top oil cylinders, respectively. The utility model relates to a C-shaped workbench, a sealing gasket clamping plate mechanism, a displacement loading mechanism, a water pressure loading mechanism, a leakage water identification mechanism and a control mechanism.

6. A waterproof test method for automatically identifying water leakage of a shield tunnel sealing gasket, which is implemented by using the waterproof test device for automatically identifying water leakage of a shield tunnel sealing gasket according to any one of claims 1 to 5, characterized in that, The sealing gasket to be tested is pasted in the joint of the sealing gasket clamping plate mechanism. The displacement loading mechanism is used to apply a predetermined load and lateral displacement to the sealing gasket clamping plate mechanism. The water pressure loading mechanism is used to gradually load to a predetermined water pressure, and the leakage water identification mechanism is used to automatically identify the leakage water condition of the sealing gasket during the water pressure loading process to obtain the waterproof performance parameters of the sealing gasket. The leakage water identification mechanism is used to automatically identify the leakage water condition of the sealing gasket during the water pressure loading process.

7. The waterproof test method for automatically identifying leakage of shield tunnel sealing gaskets according to claim 6, characterized in that, The images of the joint of the sealing gasket clamping plate mechanism are acquired at a preset time interval. When the similarity between the images and a preset image is less than a preset threshold, it is determined that leakage water occurs at the joint. ​

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