Rubber tube wear detection system

Abstract

The utility model discloses a rubber tube wear detection system. The inner lining layers are arranged in the rubber pipe, the lead groups are arranged in the inner lining layers, each lead group is composed of two parallel leads wound in the circumferential direction of each inner lining layer, and each lead group is led out of each inner lining layer and connected to an interface device. The interface device is fixed at a pipe joint of the rubber pipe and can be connected with detection equipment through a detection line, and the on-off state of each wire group can be directly judged through detection of the detection equipment so as to obtain the abrasion condition of the rubber pipe. The device has the advantages that the abrasion degree can be comprehensively identified, the inner lining layer of the rubber pipe is divided into a plurality of layers, each layer can be detected, detection can be carried out at any time from the outside, the time is prolonged to a span, and the device and a laboratory simulation system can keep a detection degree; detection equipment can be directly connected, detection is convenient and fast, time and labor are saved, and the detection effectiveness is guaranteed.

Description

Technical Field

[0001] The utility model relates to a hose wear detection technology in a conveying pipeline in a dredging project, in particular to a hose wear detection system. Background Art

[0002] Dredging rubber hose is one of the most important pipeline products, mainly used to transport a mixture of mud and water. The pipe wall structure from the inside to the outside is an inner lining layer, a reinforcement layer, an outer covering layer and hose joints connected at both ends. The inner lining layer is a wear-resistant rubber that directly contacts the conveying medium and produces wear. Since the reinforcement layer and the outer covering layer are not wear-resistant, the degree of wear of the inner lining rubber will determine the service life of the entire pipe.

[0003] Users like hoses to be durable and also hope to understand the degree of wear of the wear-resistant layer for project scheduling and allocation. Various manufacturers have come up with different methods to detect or prove their good wear resistance. The initial method of detecting the wear of the hose lining is to measure the diameter of the hose mouth and then compare it with the original diameter. The difference is the degree of wear. The measurement result of this method is more intuitive. The disadvantage of this method is that it is not accurate enough. The different parts of the hose are worn out differently. Sometimes the middle part is worn through, but the mouth is not completely worn out.

[0004] Later, after long-term practice, people found that rubber hoses are often bent during use, and the degree of wear in the middle is more serious than that in the mouth. Therefore, different colors of rubber are placed in the inner lining, such as green, yellow, orange, white, and red. The wear to that color indicates how many millimeters of wear-resistant rubber have been worn. This method is more practical and it is easy to see the wear. Technicians can clearly see the location and amount of wear with different degrees of wear. The colored rubber green, yellow, and red are very conspicuous. The disadvantage is that the cycle is long. Each time you need to wait until the project is completed to remove the pipe to see it, which takes a lot of effort.

[0005] With the development of technology, especially the widespread application of wireless radio frequency technology, foreign countries have already buried detectors in the pipe body, that is, built-in layers of detection wires in the inner lining layer, and controlled by the connected built-in automatic detection equipment, the detection results are transmitted through radio frequency information, connected to external instruments or remote computers, and real-time monitoring can be achieved. This automatic detection equipment must have its own power supply to work for a long time. This technical difficulty is relatively high. After all, some large-diameter hoses can be used for nearly 10 years, or even more than ten or twenty years under good working conditions, which is difficult to cover. Since this detection technology requires a lot of research and development in hardware and software, the cost is relatively high. If this technology is applied to all products, the cost of the product will increase significantly. In this highly competitive market, it is difficult for customers to pay for it, which has caused a shortage of R&D expenses, causing manufacturers to be unwilling to do research in this area, affecting the R&D process and practicality of this technology.

[0006] Of course, the wear detection and adaptability of hoses can also be carried out through pipeline simulation systems. Some simulation detection systems have appeared in China one after another. For example, Professor Ni of the Changzhou Branch of Hohai University has produced a reduced version of the pipeline system, and the dredger transportation simulation system established by the Tianjin Waterway Bureau. Hose pipeline wear is only a small part of it. Various complex media can be used to detect the wear of various aspects of the pipeline. The effect is still good, but the pipeline is also very worn, and the comprehensive cost of the test is very high. It is mainly used statically, and the transportation capacity can be calculated according to the wear conditions, which has great guiding significance for the working conditions. There is still a big difference between the various media changes and the different bending and dynamic activities of the pipe body in the actual dredging project construction. For hose manufacturers, it is impossible to do simulation tests, and the cost is very high.

[0007] Comparing the methods of wear detection, mouth measurement and color glue indication are intuitive, but they have to wait until the project is completed and the hose needs to be disassembled for detection, which takes a long time, a lot of effort, and is costly. Intelligent wireless detection is the best and can detect wear in real time, but the cost of technology development is a bit out of reach for hose manufacturers. Simulation detection is also a bit stressful for hose manufacturers, and there are some uncertainties. Summary of the invention

[0008] The technical problem to be solved by the utility model is to provide a hose wear detection system which can effectively control the cost, is convenient for detection and has good detection effect.

[0009] In order to solve the above technical problems, the utility model discloses a hose wear detection system, comprising a multi-layer inner lining layer arranged in the hose and a plurality of wire groups arranged in each layer of the inner lining layer, each wire group is composed of two parallel wires wound along the circumferential direction of each layer of the inner lining layer, each wire group is led out of each layer of the inner lining layer and connected to an interface device, the interface device is fixed at the pipe joint of the hose and can be connected to a detection device through a detection line, and the on-off state of each wire group can be directly judged through the detection of the detection device to obtain the wear condition of the hose.

[0010] The interface device includes a shell, a slot arranged in the shell, a wiring port arranged on the front side of the shell, and a lead connected between the slot and the wiring port. Each wire is inserted into the wiring port and connected to the slot through the lead. The shell is provided with a plug-in cavity corresponding to the slot, and the plug-in end of the detection line is inserted into the slot through the plug-in cavity.

[0011] The inner edge of the shell is provided with a door shaft located in the plug-in cavity, the door shaft is mounted with a shaft sleeve, and the shaft sleeve is installed with a door cover for blocking the opening of the plug-in cavity. The plug-in cavity can be opened and closed by switching the door cover. A sealing rubber gasket is also provided in the plug-in cavity to block between the door cover and the rear side of the slot.

[0012] A sealing groove is arranged in the plug-in cavity, the sealing rubber pad is arranged in the sealing groove, and a door buckle is arranged on the door cover.

[0013] The inner lining layer is divided into 2-6 layers according to thickness.

[0014] The starting ends of the two wires of each wire group are arranged in a "U" shape.

[0015] The two wires of each wire group are tightly attached to the inner lining glue of each layer.

[0016] The interface device is arranged in the rubber hump of the pipe joint, and an outer shell of the interface device is coated with adhesive and is integrated with the surrounding rubber through vulcanization.

[0017] The rubber hump is formed into one piece by rubber and cord fabric through a mold.

[0018] The two wires in each wire group are wire bundles formed by cross-winding of multiple thin copper wires.

[0019] The advantages of the utility model are:

[0020] (1) By setting up a plurality of layers of inner lining layers and a plurality of wire groups arranged in each layer of the inner lining layers and wound along the circumferential direction of each layer of the inner lining layers, on the one hand, the on-off state of each wire group can be directly judged by using the cooperation of the detection equipment and the wire groups in each layer of the inner lining layers to obtain the wear condition of the hose, thereby comprehensively identifying the degree of wear; on the other hand, the inner lining layer of the hose is divided into multiple layers, each layer can be detected, and can be detected from the outside at any time, and the time is extended to a span, so that the same detection level as the laboratory simulation system can be maintained.

[0021] (2) Through the design of the interface device, not only can all wire groups be reliably led out, but the detection equipment can also be directly connected through the detection line. The detection is convenient and fast, saving time and effort, and the effectiveness of the detection is guaranteed.

[0022] (3) The detection circuit composed of the interface device and the wire group is implanted in the hose, and the wire detection in the pipe body is extended to the external detection terminal for detection, which reduces the difficulty of forming the hose. At the same time, it is relatively independent of the hose system, but also connected. The hose can still be used for pipeline transportation independently. The detection circuit can also operate independently to simplify the operation, and feedback the degree of wear according to the wear of the inner lining of the hose. In this way, the degree of wear of the hose can be detected at any time, and the detection efficiency is high. Compared with the previous method of seeing the wear condition only after dismantling the pipe, it is more convenient and quicker, and avoids the labor-consuming and time-consuming problem of dismantling the pipe, saving costs.

[0023] (4) Each conductor is a wire harness composed of multiple thin copper wires cross-wound together, which can improve the strength, elongation and contact area of ​​the conductor with the rubber, thereby ensuring the integrity of the conductor. In addition, a unique "U" line layout is adopted, without crossing or overlapping, and the insulation of rubber is used to maintain a good electrical circuit.

[0024] (5) The interface device is arranged inside the rubber hump of the pipe joint, which not only provides an access location for the external interface that can be easily used, but also improves the protective performance of the hose, prevents accidental collision, abrasion and corrosion, and extends the service life of the hose. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional view of the wall of the rubber hose in the utility model;

[0026] Figure 2 It is a wiring diagram of the wire group in the utility model;

[0027] Figure 3 This is the front view of the interface device in the utility model;

[0028] Figure 4 This is a top view of the interface device in the utility model;

[0029] Figure 5 It is a schematic diagram of the test system in the utility model. DETAILED DESCRIPTION

[0030] The hose wear detection system of the present utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] The hose structure mentioned in the utility model is as follows Figure 1 As shown, from the inside to the outside, the innermost lining layer, the reinforcement layer outside the inner lining layer, the outer covering layer outside the reinforcement layer, and the pipe joints connected at both ends, the two ends of the reinforcement layer are fixed to the pipe joints by steel wires. As shown in the figure, the inner lining layer is a mixed rubber with NR as the main material, which has good wear resistance, insulation performance, anti-aging performance, etc., the outer covering layer is a mixed rubber with NR as the main material, which has good insulation, corrosion resistance, various anti-aging performance, etc. The reinforcement layer is a cord woven with polyester cords, which has good tensile strength, elongation and other properties. The pipe joint is made of ordinary steel (Q235, Q345, etc.) and is welded into a whole by a cylinder, a flange, and a steel ring. There are bolt holes on the flange as an external connection interface. The outside of the pipe joint is coated with adhesive and is integrated with the rubber through vulcanization. The hose wear detection system of the utility model includes an inner lining layer 1 divided into 2-6 layers arranged in the hose and a In the multiple groups of wire groups 2 in each layer of the inner lining layer, during the specific implementation process, the inner lining layer can be divided into multiple layers according to thickness, such as 30mm is divided into 15+10+5mm, 40mm is divided into 15+10+10+5mm, 50mm is divided into 20+15+10+5mm, and 75mm is divided into 15+15+15+15+10+5mm. In this embodiment, the inner lining layer is divided into three layers according to thickness, and the wire groups are arranged after the first layer and the second layer. Each group of wire groups 2 is composed of two parallel wires wound along each layer of the inner lining layer. Each group of wire groups 2 is led out of each layer of the inner lining layer and connected to the interface device 3. The interface device 3 is fixed at the pipe joint of the hose and can be connected to the detection device 4 through the detection line. The detection device 4 mentioned in this embodiment is a multimeter. The interface device 3 includes a shell 3-1, a slot 3-2 arranged in the shell, and a socket 3-2 arranged on the front side of the shell ( Figure 4 The left side is defined as the front side, and the right side is defined as the rear side) as shown in the figure, a wiring port 3-3 with multiple groups of wiring card slots and a lead 3-4 connected between the slot and the wiring port, the slot can be arranged with multiple groups (4 to 6 groups) of wires, corresponding to the wiring port, each wire is inserted into the wiring card slot corresponding to the wiring port 3-3 and connected to the slot 3-2 through the lead 3-4, the housing 3-1 is provided with a plug-in cavity corresponding to the slot, and the plug-in end of the detection line connected to the detection device 4 is inserted into the slot 3-2 through the plug-in cavity;

[0032] In this technical solution, the wire and the interface device constitute a detection system for detecting the hose, so that the detection system is implanted in the hose and can be manually detected at any time through external connection. During the specific detection, the detection of the detection device 4 can detect the connectivity of the wires in each layer, which is "1" if it is common and "0" if it is different (the principle is: when the hose transports mud and sand, it will reach the wire layer when a certain amount of wear is reached, and the wire will be worn off, resulting in the detection result of the detection device being "0", which is displayed as being worn to this position), and the connectivity of each layer can be displayed through the display unit (i.e., the display screen) of the detection device, so as to directly judge the on-off state of each group of wire groups to obtain the wear condition of the hose. It can be seen that the detection system mainly adopts electric circuit technology. With this design, as long as it is not underwater, it can be detected at any time to grasp the wear condition, so as to have a clear idea, which achieves the effect of accurate detection, but the R&D cost can be greatly reduced. Similarly, compared with the measurement and three-color indicator layer, in addition to being unintuitive, it can also evaluate the approximate wear position, and it has strong real-time performance and does not need to be disassembled, saving a lot of management and labor costs.

[0033] In actual application, after a long period of operation, the thickness of the lining layer can be known according to the position of wear. Then the amount of sediment transported during this period can be adjusted to calculate the transport index and transport capacity under this working condition. Compared with the results calculated by the simulation system in the laboratory, it takes a little longer, but the effect achieved will be better, more realistic and more valuable.

[0034] Furthermore, the inner edge of the shell 3-1 is provided with a door shaft 3-5 located in the plug-in cavity, the door shaft 3-5 is sleeved with a shaft sleeve 3-6, and a door cover 3-7 for blocking the opening of the plug-in cavity is installed on the shaft sleeve, and a door buckle 3-10 is provided on the door cover 3-7, and the plug-in cavity can be opened and closed by operating the door buckle 3-10 on the door cover 3-7. A sealing groove 3-9 is provided in the plug-in cavity, and a sealing rubber gasket is placed in the sealing groove, so that the sealing rubber gasket 3-8 is blocked between the door cover 3-7 and the back side of the slot 3-2. The door cover 3-7 can be opened by rotating the door shaft, and the sealing rubber gasket in the sealing groove 3-9 can be manually opened to expose the internal slot 3-2, and the external detection equipment 4 can be inserted into the slot 3-2 through the connector 6 of the detection line 5 for connection and detection. In this embodiment, the wiring port has four groups of wiring and eight card slots. Two groups of wires are connected to the wiring port in sequence and connected to the slots through leads. The slots can be arranged with four groups of wires. Corresponding to the wiring port, the door cover has a shaft sleeve and a door buckle. The shaft sleeve is sleeved on the door shaft. By pulling the door buckle, the door panel can be rotated around the door shaft to open or close the door panel. Open the door cover, remove the sealing pad, and the slot is exposed, and the detection terminal can be connected. After the detection is completed, the detection terminal is disconnected, the sealing pad is placed, and the door cover is closed.

[0035] After the detection line is connected to the interface device, turn on the multimeter and detect the electrical circuit connectivity signals of each layer of wire in turn. If connectivity is found, it means that the position is not worn, and if disconnection is found, it means that the position is worn. The detection status is displayed on the screen of the detection device (or detection device, a multimeter is used in this embodiment).

[0036] Furthermore, the two wires in each wire group are wire harnesses composed of multiple thin copper wires cross-wound, bare, and have good conductivity, tensile strength, and anti-bending properties. Of course, for safety reasons, a silicone sleeve can be put on the lead wire after it is wrapped around the tube body to prevent multiple wires from crossing or contacting before they are aggregated and connected to the interface device; the two wires in the wire group are arranged in parallel and wound in a circular direction from one end to the other, and then passed out and connected to the external interface device. Of course, the wires are wound in each layer of the lining layer in turn and led out to the interface device, such as Figure 2 As shown, the starting ends of the two wires of each wire group are arranged in a "U" shape (such as Figure 2 As shown in the figure, at the rear position of the pipe joint at one end of each layer, the wires are arranged in a "U" shape or two wire joints, and the wires on both sides are first wound in a similar parallel line (40 to 60 mm apart) manner, and when approaching the starting point, they are wound toward the other end at a certain distance (60 to 100 mm apart) to the pipe joint at the other end, and then they are led out when they are wound once and approaching the front wire. Specifically, in this embodiment, the two wires of the first layer are arranged in a "U" shape or two wire joints from the rear position of the pipe joint at one end, and the wires on both sides are first wound in a similar parallel line (about 50 mm apart) manner, and when approaching the starting point, they are wound toward the other end at a certain distance (about 70 mm) to the pipe joint at the other end. After the head, it goes around a circle and is led out when it is close to the previous circle of wires, passing through the reinforcement layer. The arranged wires are tightly attached to the first layer of the inner lining rubber and cannot cross or overlap each other; the two wires of the second layer of the inner lining rubber are also arranged and led out in this way, passing through the reinforcement layer, separated from each other, two wires in each layer are a group, and the two groups of wires are connected and fixed to the external interface device in a certain order, so that the wires of each layer are arranged and led out in turn in this way, passing through the reinforcement layer, separated from each other, two wires in each layer are a group, and are connected and fixed to the external interface device in turn, and the interface device is placed in the rubber hump on the pipe joint, and the two wires of each group of wires are tightly attached to the inner lining rubber of each layer, and cannot cross or overlap each other.

[0037] Furthermore, the interface device 3 is arranged in the rubber hump of the pipe joint. The outer shell of the interface device is coated with adhesive and is integrated with the surrounding rubber through vulcanization. One side is outside and the door cover can be opened. The rubber hump is composed of rubber and curtain cloth, and is formed by a mold. The rubber is the same as the outer covering rubber.

[0038] When in use, after the multimeter is connected to the interface device, the test can be started, and the connectivity of the two wire groups can be detected in turn, and the detection status can be displayed on the screen of the multimeter, and the wear status can be seen. If both wire groups are connected, it shows that the wear position is still on the first layer of the inner lining. If the first layer wire group is not connected, but the second layer wire is connected, the wear position is on the second layer of the inner lining. If both wire groups are not connected, the wear position is already on the third layer of the inner lining or the third layer has been worn out, and it is necessary to make spare parts or replace the hose as soon as possible. After the test is completed, disconnect the multimeter and close the interface device.

[0039] The utility model designs the detection system on the basis of the hose, so that the hose wear detection can become a normal state, and the terminal is used for detection, which is simple and convenient to operate, and the detection result is displayed on the screen in a relatively intuitive and vivid manner; the utility model can enable the user to grasp the hose conveying status at any time, and no longer need to worry about how the pipe is worn, so that the user can have a clear idea in mind, making the use, dispatch and production of spare parts of the hose more relaxed.

[0040] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A hose wear detection system, characterized by: The invention comprises a multi-layer inner lining layer (1) arranged in a rubber hose and a plurality of wire groups (2) arranged in each layer of the inner lining layer, each wire group (2) being composed of two parallel wires wound along the circumferential direction of each layer of the inner lining layer, each wire group (2) being led out of each layer of the inner lining layer and connected to an interface device (3), the interface device (3) being fixed at a pipe joint of the rubber hose and being able to connect to a detection device (4) through a detection line, and the on-off state of each wire group being able to be directly judged through the detection of the detection device (4) to obtain the wear condition of the rubber hose.

2. The hose wear detection system according to claim 1, characterized in that: The interface device (3) comprises a housing (3-1), a slot (3-2) arranged in the housing, a wiring port (3-3) arranged on the front side of the housing, and a lead wire (3-4) connected between the slot and the wiring port, each of the wires being inserted into the wiring port (3-3) and connected to the slot (3-2) via the lead wire (3-4), the housing (3-1) being provided with a plug-in cavity corresponding to the slot, and the plug-in end of the detection line being inserted into the slot (3-2) via the plug-in cavity.

3. The hose wear detection system according to claim 2, characterized in that: The inner edge of the housing (3-1) is provided with a door shaft (3-5) located in the plug-in cavity, the door shaft (3-5) is sleeved with a shaft sleeve (3-6), the shaft sleeve is provided with a door cover (3-7) for blocking the plug-in cavity opening, the plug-in cavity can be opened and closed by switching the door cover (3-7), and the plug-in cavity is also provided with a sealing rubber pad (3-8) blocking between the door cover (3-7) and the rear side of the slot (3-2).

4. The hose wear detection system according to claim 3, characterized in that: A sealing groove (3-9) is provided in the plug-in cavity, the sealing rubber pad is arranged in the sealing groove, and a door buckle (3-10) is provided on the door cover (3-7).

5. The hose wear detection system according to any one of claims 1 to 4, characterized in that: The inner lining layer is divided into 2-6 layers according to thickness.

6. The hose wear detection system according to claim 5, characterized in that: The starting ends of the two wires of each wire group are arranged in a "U" shape.

7. The hose wear detection system according to claim 1, characterized in that: The two wires of each wire group are tightly attached to the inner lining glue of each layer.

8. The hose wear detection system according to claim 7, characterized in that: The interface device (3) is arranged in the rubber hump of the pipe joint, and an outer shell of the interface device is coated with adhesive and is integrated with the surrounding rubber through vulcanization.

9. The hose wear detection system according to claim 8, characterized in that: The rubber hump is formed into one piece by rubber and cord fabric through a mold.

10. The hose wear detection system according to claim 9, characterized in that: The two wires in each wire group are wire bundles formed by cross-winding of multiple thin copper wires.

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