A test system and method for a ballastless track sealant

Abstract

A kind of test system and method of ballastless track sealant, system: heat shield is equipped in the outside of track assembly;Test car body is equipped on two tracks by wheel rolling;Two sets of vehicle traction mechanism are oppositely distributed on the two sides of test car body, and hoisting equipment is connected to test car body by traction rope;Multiple groups of illumination components are arranged inside heat shield;Temperature adjusting component includes temperature sensor, heating unit and cooling unit;Humidity adjusting component includes humidity sensor, spray pipeline, water tank, high-pressure water pump and exhaust unit;Each group of deformation monitoring component is arranged at the joint between adjacent two track plates;Method: in the stage operation of each cycle full journey, simultaneously implement set temperature condition test operation or implement set humidity condition test operation or implement set illumination condition test operation or composite condition test operation, and record experimental parameters. The system and method can comprehensively and accurately test the performance of sealant.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of intelligent detection, and particularly relates to a test system and method for sealing glue of a ballastless track. BACKGROUND

[0002] As an important component of modern high-speed trains, the ballastless track has many advantages over the ballast track, such as high stability and smoothness, less maintenance workload, long service life, low maintenance cost and the like.

[0003] In the ballastless track structure, the sealing glue at the joint of the track slab plays an extremely important role, and the specific roles mainly include: ① waterproof sealing, preventing rainwater from entering the track bottom concrete; ② adapting to the thermal expansion and cold contraction of the track slab to maintain the sealing effect; ③ bonding the track slab and the concrete structure to enhance the stability of the overall structure. Therefore, the quality of the sealing glue of the ballastless track plays an extremely important role in ensuring the stability and service life of the ballastless track structure. Meanwhile, before the sealing glue is actually used in the construction of the ballastless track, its sealing performance must be detected to ensure that it meets the long-term stability and durability requirements of the track structure.

[0004] The track structure is affected by various factors, including temperature, humidity, light, rain, vibration and the like. If the sealing glue is tested on the operating section, there are many problems, such as large occupied area, unclear experimental results, great difficulty in obtaining parameters, and uncontrollable environmental factors. At present, there is no related experimental test system for testing the sealing glue of the ballastless track on the market, which can test the parameters of the sealing glue under artificial control conditions. Therefore, it is urgent to provide an integrated sealing glue test system and method for the ballastless track, which can artificially control environmental factors, has small occupied area, can simulate real railway operation conditions, has high safety, low experimental cost and easy measurement. SUMMARY

[0005] In view of the problems in the prior art, the application provides a test system and method for sealing glue of a ballastless track. The system has simple structure and low manufacturing cost, and can simulate the use performance of the sealing glue at the joint of the track slab in the ballastless track under real environment in an experimental environment. The method has simple implementation process and low implementation cost, and can comprehensively and accurately test the performance of the sealing glue under the condition of artificially controlling environmental factors.

[0006] To achieve the above purpose, the application provides a test system for sealing glue of a ballastless track, which comprises a track assembly, a heat preservation cover, a test vehicle body, a vehicle traction mechanism, a light assembly, a temperature adjusting assembly, a humidity adjusting assembly, a deformation monitoring assembly and a control terminal.

[0007] The track assembly comprises a concrete base, track plates, tracks and drainage pipelines; two concrete platforms are cast at the two ends of the concrete base, two drainage grooves are oppositely formed in the width direction of the concrete base, a plurality of track plates are sequentially arranged between the two concrete platforms and are laid on the concrete base through auxiliary cushion layers, meanwhile, the joints between the adjacent two track plates are sealed and connected through the sealant to be tested, two tracks are installed side by side on the track plates, and two pairs of drainage pipelines are respectively embedded in the two concrete platforms, and the inner end of each drainage pipeline is in communication with the end of the corresponding drainage groove, and the outer end of each drainage pipeline extends to the outer end of the concrete platform;

[0008] The heat preservation cover is a box structure with an open lower end, two pairs of drainage holes are formed at the positions corresponding to the two pairs of drainage pipelines in the length direction of the heat preservation cover, the heat preservation cover is arranged outside the track assembly, the drainage holes of the heat preservation cover are sleeved outside the outer ends of the corresponding drainage pipelines, and a test space is formed in the heat preservation cover;

[0009] The bottom of the test vehicle body is equipped with a plurality of pairs of wheels, and the test vehicle body is rollingly equipped on the two tracks through the wheels, and a speed sensor is equipped on the wheels;

[0010] The two sets of vehicle traction mechanisms are relatively distributed on the two sides of the test vehicle body; the vehicle traction mechanism comprises a winch device, a connecting piece and a traction rope, the winch device is fixedly installed on the concrete platform, one end of the traction rope is connected to the drum of the winch device, and the other end of the traction rope is connected to the test vehicle body through the connecting piece;

[0011] A plurality of groups of illumination assemblies are sequentially and spacedly installed in the interior of the heat preservation cover;

[0012] The temperature adjusting assembly comprises a temperature sensor, a heating unit and a cooling unit; the temperature sensor is installed in the interior of the heat preservation cover; the heating unit is connected with the heat preservation cover and is used for increasing the temperature in the test space; the cooling unit is connected with the heat preservation cover and is used for decreasing the temperature in the test space;

[0013] The humidity adjusting assembly comprises a humidity sensor, a spraying pipeline, a high-pressure water source and an exhaust unit;

[0014] The humidity sensor is installed in the interior of the heat preservation cover; the spraying pipeline is installed on the top plate in the heat preservation cover; the high-pressure water source is located outside the heat preservation cover and is connected with the water inlet of the spraying pipeline; the exhaust unit is connected with the heat preservation cover and is used for exhausting the gas in the test space to the outside;

[0015] A plurality of deformation monitoring assemblies are arranged along the length direction of the concrete base and are spaced apart from each other, and each deformation monitoring assembly is arranged at a joint between two adjacent track plates, and each deformation monitoring assembly comprises three deformation monitoring members, which are arranged at two ends and a middle portion of the joint in the length direction; the deformation monitoring member comprises a linear displacement sensor and a baffle, wherein the linear displacement sensor is fixedly installed at the edge of one track plate, and the baffle is adjacently installed at the edge of the other track plate and is connected with the linear displacement sensor through a connecting rod.

[0016] The control terminal is connected with the hoisting device, the speed sensor, the illumination assembly, the temperature sensor, the heating unit, the cooling unit, the humidity sensor and the exhaust unit.

[0017] Further, in order to simulate the running conditions under different loads, counterweights are arranged in the internal space of the test vehicle body, the number of the counterweights is two, and the two counterweights are oppositely arranged at two ends of the internal space of the test vehicle body; in order to effectively test the optical performance, aging resistance, bonding strength and durability of the sealant, the illumination assembly is a UV lamp tube and a lamp holder; in order to enable the displacement sensor to have good anti-vibration and impact performance and to be able to operate stably for a long time, the linear displacement sensor is an LVDT linear displacement sensor.

[0018] As a preferred, the heating unit comprises heat dissipation plates and a heat exchanger, a plurality of heat dissipation plates are sequentially and spaced apart installed in the interior of the heat preservation cover, the heat exchanger is installed outside the heat preservation cover and connected with the plurality of heat dissipation plates through a heat exchange circulation pipeline penetrating through the heat preservation cover, and connected with the control terminal.

[0019] As a preferred, the cooling unit comprises air pipes and refrigeration equipment, two air pipes are spaced apart arranged in two upper mounting holes pre-provided on the upper portion of the heat preservation cover, the refrigeration equipment is installed outside the heat preservation cover and connected with the two air pipes through a supply air pipeline and a return air pipeline, and connected with the control terminal.

[0020] As a preferred, the exhaust unit comprises a plurality of exhaust pipes and a plurality of air exchange fans, the plurality of exhaust pipes are respectively arranged in a plurality of lower mounting holes pre-provided on the lower portion of the heat preservation cover, the plurality of air exchange fans are correspondingly installed in the plurality of exhaust pipes, and connected with the control terminal.

[0021] In the application, two concrete platforms are poured at both ends of the concrete base to provide support and fixing bases for the traction equipment on both sides. Two drainage grooves are formed at both ends of the concrete base in the width direction, and the inner end of the drainage pipeline buried in the concrete platform is communicated with the end part of the drainage groove, and the outer end of the drainage pipeline extends out through the drainage hole of the heat preservation cover, so that the waste water sprayed out by the spray pipeline can be collected by the drainage groove, and the collected waste water can be discharged in time, thereby avoiding the accumulation of waste water which has adverse effects on the internal test environment, and thus facilitating the acquisition of real test results and test data. The speed sensor is assembled on the wheel of the test vehicle body, so that the speed signal of the test vehicle body can be collected in real time, and thus the speed data of the test vehicle body can be obtained. Two vehicle traction mechanisms are arranged on both sides of the test vehicle body, and the winch equipment is connected with the test vehicle body through the traction rope, so that the winch equipment in the advancing direction can be used to provide the test vehicle body with advancing traction, and since the length of the simulated track assembly is limited, the test vehicle body must be decelerated during the running process in the second half of the journey, and the winch equipment in the retreating direction can be used to provide the test vehicle body with deceleration traction, so that the two vehicle traction mechanisms can be used in cooperation to realize traction control of the test vehicle in the whole running interval, thereby ensuring the control of different running speeds of the test vehicle body in the case of small overall journey, and ensuring the safe and stable operation of the test vehicle body in the whole running interval. The multiple light assemblies can provide different light intensity conditions in the test space, and thus the performance of the sealant can be tested under different light conditions. The temperature sensor can be used to sense the temperature data of the test environment in real time. The multiple heat dissipation plates arranged in the heat preservation cover are connected with the heat exchanger, so that the temperature of the test environment can be increased by heating. Two air pipes are installed on the upper part of the heat preservation cover and are connected with the refrigeration equipment through the air supply pipeline and the air return pipeline, so that the refrigeration equipment can be used to adjust the temperature of the test environment. The humidity sensor can be used to sense the humidity data of the test environment in real time. The spray pipeline is installed on the top of the heat preservation cover, and the spray pipeline is connected with the water tank by the high-pressure water pump, so that the spray conditions can be simulated in the test space, and the humidity conditions of the test environment can be adjusted by the spray pipeline, thereby effectively testing the performance of the sealant under different humidity conditions. Multiple exhaust pipes are installed on the lower part of the heat preservation cover, and the air exchanger is installed in the exhaust pipe, so that the air exchanger can be used to quickly realize the air exchange action, and thus the humidity range in the test environment can be adjusted quickly. Three deformation monitoring members are arranged at the joint between the adjacent two track plates, so that different deformation conditions at the same joint can be collected in real time, and thus the deformation curve can be drawn according to the deformation data obtained during the test, which helps to more accurately analyze the performance of the sealant.Through the control terminal, the automation control of the test process can be facilitated, and thus the interference of human factors can be avoided, and the accuracy of test data can be improved.

[0022] The test system has simple structure and low manufacturing cost, and can simulate the performance of the sealant at the joint of the track slab in the ballastless track in a real environment and the deformation of the track slab in the ballastless track in a real environment.

[0023] The application further provides a test method of the sealant for the ballastless track.

[0024] Step one: according to the set experimental parameters, the weight of the counterweight is selected, and the counterweight is assembled in the internal space of the test vehicle body;

[0025] Step two: the winch device in the forward direction is started to work, the test vehicle body is pulled forward through the corresponding traction rope, at the same time, the speed sensor is used to collect the vehicle speed signal of the test vehicle body in real time and send it to the control terminal, and the control terminal obtains the vehicle speed data according to the vehicle speed signal;

[0026] Step three: the control terminal judges whether the current journey of the test vehicle body reaches half of the maximum journey according to the vehicle speed data and the running time, when the current journey reaches half of the maximum journey, the winch device in the forward direction is stopped, at the same time, the winch device in the backward direction is started to work, and the test vehicle body is slowed down in the second half of the journey through the corresponding traction rope providing the pulling force opposite to the forward direction;

[0027] At the same time, the control terminal controls the traction speed of the winch device in the backward direction according to the vehicle speed data, so as to ensure that the speed of the test vehicle body is just 0 when reaching the journey end point;

[0028] Step four: steps two and three are repeated for multiple times, so that the test vehicle body reciprocates on the track to run the whole journey, until the set running period is reached and stopped, at the same time, the set temperature condition test operation or the set humidity condition test operation or the set illumination condition test operation or the composite condition test operation is implemented synchronously during the whole journey of each period, and the experimental parameters are recorded;

[0029] Step five: after the test operation is completed, the performance of the sealant is analyzed according to the obtained experimental parameters, and the performance data of the sealant is obtained.

[0030] Further, in order to effectively test the performance of the sealant under the set temperature condition, in step four, the process of implementing the set temperature condition test operation is as follows:

[0031] The temperature sensor is used to collect the temperature signal inside the heat preservation cover in real time and send it to the control terminal. The control terminal obtains the environmental temperature data according to the temperature signal, and compares the set temperature data with the environmental temperature data;

[0032] When the set temperature data is equal to the environmental temperature data, the current state is kept unchanged;

[0033] When the set temperature data is higher than the environmental temperature data, the control terminal controls the heat exchanger to start working, and controls the power of the heat exchanger according to the environmental temperature data. When the environmental temperature data is equal to the set temperature data, the control terminal controls the heat exchanger to stop working;

[0034] When the set temperature data is lower than the environmental temperature data, the control terminal controls the refrigeration equipment to start working, and uses the refrigeration equipment to cool the internal space of the heat preservation cover. When the environmental temperature data is equal to the set temperature data, the control terminal controls the refrigeration equipment to stop working;

[0035] At the same time, a plurality of linear displacement sensors are used to collect displacement signals at a plurality of joints in real time, and send them to the control terminal. The control terminal obtains displacement data at the joints according to the displacement signals, and records them;

[0036] The above actions continue until the set time length is reached.

[0037] Further, in order to effectively test the performance of the sealant under the set illumination condition, in step four, the process of implementing the set illumination condition test operation is as follows:

[0038] The multiple illumination components are controlled to provide the set illumination intensity, and after the set time length is reached, the multiple illumination components are controlled to be turned off. At the same time, a plurality of linear displacement sensors are used to collect displacement signals at a plurality of joints in real time, and send them to the control terminal. The control terminal obtains displacement data at the plurality of joints according to the displacement signals, and records them.

[0039] Further, in order to effectively test the performance of the sealant under the set humidity condition, in step four, the process of implementing the set humidity condition test operation is as follows:

[0040] When the continuous spraying condition is needed, the control terminal controls the high-pressure water source to start working, and uses the spraying pipeline to spray liquid on the track plate. At the same time, a plurality of linear displacement sensors are used to collect displacement signals at a plurality of joints in real time, and send them to the control terminal. The control terminal obtains displacement data at the joints according to the displacement signals, and records them. After the set time length is reached, the control terminal controls the high-pressure water source to stop working;

[0041] When the humidity condition needs to be set, the humidity sensor is used to collect the humidity signal inside the heat preservation cover in real time and send it to the control terminal, the control terminal obtains the environmental humidity data according to the humidity signal, and compares the set humidity data with the environmental humidity data; when the set humidity data is equal to the environmental humidity data, the current state is kept unchanged; when the set humidity data is higher than the environmental humidity data, the control terminal controls the ventilation fan to start working, when the environmental humidity data is equal to the set humidity data, the ventilation fan is stopped; when the set humidity data is lower than the environmental humidity data, the control terminal controls the high-pressure water source to start working, and the internal space of the heat preservation cover is humidified by the spraying pipeline, when the current environmental humidity data is equal to the set humidity data, the high-pressure water source is stopped; at the same time, the displacement signals of the multiple joints are collected in real time by the multiple linear displacement sensors and sent to the control terminal, the displacement data of the joints are obtained by the control terminal according to the displacement signals, and are recorded; the above actions are continued until the set time length is reached.

[0042] Further, in order to more comprehensively test the performance of the sealant, in step four, the composite condition test operation is simultaneously implemented set temperature condition test operation, set humidity condition test operation, set illumination condition test operation.

[0043] In the present application, during the test vehicle body operation, the hoisting device in the forward direction is used to provide acceleration traction in the first half of the journey to increase the speed, and the hoisting device in the backward direction is used to provide deceleration traction in the second half of the journey to reduce the speed, and the hoisting device is controlled in a closed loop through the speed data fed back by the speed sensor, which can ensure that the test vehicle body can run through the set running interval completely in each cycle of full journey, and can avoid collision with the concrete platform at the end and the hoisting device. During the operation in each cycle of full journey, the set temperature condition test operation or the set humidity condition test operation or the set illumination condition test operation or the composite condition test operation is simultaneously implemented, which can effectively simulate the performance parameters of the sealant under the running condition, under the set temperature condition, under the set humidity condition, under the set illumination condition and under the composite condition, and thus is beneficial to comprehensively evaluate the overall performance of the sealant and is beneficial to accurately evaluate the performance parameters of the sealant before actual use.

[0044] The method has simple implementation process and low implementation cost, and provides an integrated ballastless track sealant test method which has artificial control of environmental factors, smaller area than a real railway, high safety, low cost and easy measurement, and can comprehensively and accurately test the performance of the sealant under the condition of artificial control of environmental factors. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 is a schematic diagram of the plane structure of the present application;

[0046] Figure 2 is a schematic diagram of the three-dimensional structure of the present application Figure 1 ;

[0047] Figure 3 is a schematic diagram of the three-dimensional structure of the present application Figure 2 ;

[0048] Figure 4 is a schematic diagram of the cooperation of the test vehicle body and the track assembly and the vehicle traction mechanism in the present application;

[0049] Figure 5 is a schematic diagram of the assembly of the deformation monitoring unit and the track plate in the present application;

[0050] Figure 6 is a flowchart of the overall test method in the present application;

[0051] Figure 7 is a flowchart of the implementation of the temperature condition setting test operation in the present application;

[0052] Figure 8 is a flowchart of the implementation of the humidity condition setting test operation in the present application;

[0053] Figure 9 is a flowchart of the implementation of the light condition setting test operation in the present application.

[0054] In the figure: 100, track assembly, 101, drainage pipeline, 102, concrete base, 103, concrete platform, 104, track plate, 105, track, 106, sealant; 200, vehicle traction mechanism, 201, hoisting equipment, 202, traction rope, 203, connecting piece; 300, temperature adjusting assembly, 301, heat dissipation plate, 302, air pipe; 400, humidity adjusting assembly, 401, exhaust pipe, 500, light assembly, 600, deformation monitoring assembly, 601, linear displacement sensor, 602, baffle; 700, heat preservation cover; 800, test vehicle body, 801, counterweight. DETAILED DESCRIPTION

[0055] The present application will be further described below in conjunction with the accompanying drawings.

[0056] As shown in Figures 1 to 9 , the present application provides a test system for sealant of ballastless track, which comprises a track assembly 100, a heat preservation cover 700, a test vehicle body 800, a vehicle traction mechanism 200, a light assembly 500, a temperature adjusting assembly 300, a humidity adjusting assembly 400, a deformation monitoring assembly 600 and a control terminal.

[0057] The track assembly 100 comprises a concrete base 102, track plates 104, tracks 105 and drainage pipes 101; two concrete platforms 103 are cast at the lengthwise two ends of the concrete base 102, two drainage grooves are oppositely formed in the width direction of the concrete base 102; a plurality of track plates 104 are sequentially arranged between the two concrete platforms 103 and are laid on the concrete base 102 through auxiliary cushion layers, meanwhile, the joints between the adjacent two track plates 104 are sealed and connected through the sealant 106 to be tested; two tracks 105 are installed side by side on the track plates 104; two pairs of drainage pipes 101 are respectively buried in the two concrete platforms 103, and the inner end of each drainage pipe 101 is in communication with the end of the corresponding drainage groove, and the outer end of each drainage pipe 101 extends to the outer end of the concrete platform 103;

[0058] The heat preservation cover 700 is a box structure with an open lower end, two pairs of drainage holes are formed at the lengthwise two ends of the heat preservation cover 700 at positions corresponding to the two pairs of drainage pipes 101; the heat preservation cover 700 is arranged outside the track assembly 100, the lower end of the heat preservation cover 700 is sealingly connected with the periphery of the concrete base 102, and the drainage holes of the heat preservation cover 700 are sleeved outside the outer ends of the corresponding drainage pipes 101, meanwhile, a test space is formed in the interior of the heat preservation cover 700;

[0059] As a preferred, the heat preservation cover 700 is made of a color steel insulation board;

[0060] As a preferred, a water collecting tank is further arranged outside the heat preservation cover 700, wherein the outer end of the drainage pipe 101 is connected with the water inlet of the water collecting tank, so that the discharged wastewater can be conveniently collected, which is beneficial to the reuse of water resources.

[0061] The bottom of the test vehicle body 800 is equipped with a plurality of pairs of wheels matched with the two tracks 105, and a speed sensor is arranged on one of the wheels, and the test vehicle body 800 is rollingly arranged on the two tracks 105 through the wheels;

[0062] The two vehicle traction mechanisms 200 are oppositely arranged on the two sides of the test vehicle body 800; the vehicle traction mechanism 200 comprises a hoisting device 201, a connecting piece 203 and a traction rope 202, the hoisting device 201 is fixedly installed on the concrete platform 103; one end of the traction rope 202 is wound around a drum connected with the hoisting device 201, and the other end of the traction rope 202 is connected with the test vehicle body 800 through the connecting piece 203;

[0063] A plurality of groups of light illumination assemblies 500 are sequentially and spacedly arranged in the interior of the heat preservation cover 700;

[0064] The temperature adjusting assembly 300 comprises a temperature sensor, a heating unit and a cooling unit; the temperature sensor is installed inside the heat preservation cover 700; the heating unit is connected with the heat preservation cover 700 and used for increasing the temperature in the test space; as a preferred, the heating unit comprises heat dissipation plates 301 and a heat exchanger, a plurality of heat dissipation plates 301 are installed inside the heat preservation cover 700 in sequence and at intervals, the heat exchanger is installed outside the heat preservation cover 700 and connected with the plurality of heat dissipation plates 301 through a heat exchange circulation pipeline penetrating through the heat preservation cover 700, and connected with the control terminal; the cooling unit is connected with the heat preservation cover 700 and used for decreasing the temperature in the test space; as a preferred, the cooling unit comprises air pipes 302 and a refrigeration device, two air pipes 302 are assembled in two upper mounting holes pre-provided on the upper portion of the heat preservation cover 700 at intervals, the refrigeration device is installed outside the heat preservation cover 700 and connected with the two air pipes 302 through air supply pipelines and air return pipelines respectively, and connected with the control terminal; as a preferred, the plurality of heat dissipation plates 301 are distributed around the concrete base 102 and fixedly installed on the inner side wall of the heat preservation cover 700;

[0065] The humidity adjusting assembly 400 comprises a humidity sensor, a spraying pipeline, a high-pressure water source and an exhaust unit;

[0066] The humidity sensor is installed inside the heat preservation cover 700 in sequence and at intervals; the spraying pipeline is installed on the top plate inside the heat preservation cover 700; the high-pressure water source is located outside the heat preservation cover 700 and connected with the water inlet of the spraying pipeline; as a preferred, the high-pressure water source comprises a water tank and a high-pressure water pump, the water tank is installed outside the heat preservation cover 700; the water inlet of the high-pressure water pump is connected with the water outlet at the bottom of the water tank through a water suction pipeline, and the water outlet is connected with the spraying pipeline through a drainage pipeline penetrating through the heat preservation cover 700; the exhaust unit is connected with the heat preservation cover 700 and used for exhausting the gas inside the test space to the outside; as a preferred, the exhaust unit comprises a plurality of exhaust pipes 401 and a plurality of air exchange fans, the plurality of exhaust pipes 401 are assembled in a plurality of lower mounting holes pre-provided on the lower portion of the heat preservation cover 700 respectively, and the plurality of air exchange fans are installed in the plurality of exhaust pipes 401 correspondingly and connected with the control terminal;

[0067] A plurality of sets of deformation monitoring assemblies 600 are arranged along the length direction of the concrete base 102 in a spaced manner, and correspond to a plurality of joints between the plurality of track plates 104, and each set of deformation monitoring assemblies 600 is arranged at a joint between two adjacent track plates 104, and each set of deformation monitoring assemblies 600 includes three deformation monitoring members, which are respectively arranged at two ends and a middle portion of the length direction of the joint; the deformation monitoring member includes a linear displacement sensor 601 and a baffle 602, wherein the linear displacement sensor 601 is fixedly installed at the edge of one track plate 104, and the baffle 602 is adjacently installed at the edge of the other track plate 104 and connected with the linear displacement sensor 601 through a connecting rod.

[0068] The control terminal is connected with the hoisting device 201, the speed sensor, the light assembly 500, the temperature sensor, the heating unit, the cooling unit, the humidity sensor, the high-pressure water pump and the exhaust unit respectively.

[0069] As a preferred, the control terminal includes a control box and a controller installed in the control box, and further preferably the controller is a PLC controller.

[0070] In order to simulate the running conditions under different loads, the counterweight 801 is further arranged in the internal space of the test vehicle body 800.

[0071] In order to effectively test the optical performance, anti-aging performance, bonding strength and durability of the sealant, the light assembly 500 is a UV lamp tube and a lamp holder.

[0072] In order to enable the displacement sensor to have good anti-vibration and impact performance, to be able to operate stably for a long time, and in order to accurately collect displacement data, the linear displacement sensor 601 is an LVDT linear displacement sensor.

[0073] As a preferred, the number of the counterweights 801 is two, and the two counterweights 801 are oppositely arranged at two ends of the internal space of the test vehicle body 800.

[0074] In the application, two concrete platforms are poured at both ends of the concrete base to provide support and fixing bases for the traction equipment on both sides. Two drainage grooves are formed at both ends of the concrete base in the width direction, and the inner end of the drainage pipeline buried in the concrete platform is communicated with the end part of the drainage groove, and the outer end of the drainage pipeline extends out through the drainage hole of the heat preservation cover, so that the waste water sprayed out by the spray pipeline can be collected by the drainage groove, and the collected waste water can be discharged in time, thereby avoiding the accumulation of waste water which has adverse effects on the internal test environment, and thus facilitating the acquisition of real test results and test data. The speed sensor is assembled on the wheel of the test vehicle body, so that the speed signal of the test vehicle body can be collected in real time, and thus the speed data of the test vehicle body can be obtained. Two vehicle traction mechanisms are arranged on both sides of the test vehicle body, and the winch equipment is connected with the test vehicle body through the traction rope, so that the winch equipment in the advancing direction can be used to provide the test vehicle body with advancing traction, and since the length of the simulated track assembly is limited, the test vehicle body must be decelerated during the running process in the second half of the journey, and the winch equipment in the retreating direction can be used to provide the test vehicle body with deceleration traction, so that the two vehicle traction mechanisms can be used in cooperation to realize traction control of the test vehicle in the whole running interval, thereby ensuring the control of different running speeds of the test vehicle body in the case of small overall journey, and ensuring the safe and stable operation of the test vehicle body in the whole running interval. The multiple light assemblies can provide different light intensity conditions in the test space, and thus the performance of the sealant can be tested under different light conditions. The temperature sensor can be used to sense the temperature data of the test environment in real time. The multiple heat dissipation plates arranged in the heat preservation cover are connected with the heat exchanger, so that the temperature of the test environment can be increased by heating. Two air pipes are installed on the upper part of the heat preservation cover and are connected with the refrigeration equipment through the air supply pipeline and the air return pipeline, so that the refrigeration equipment can be used to adjust the temperature of the test environment. The humidity sensor can be used to sense the humidity data of the test environment in real time. The spray pipeline is installed on the top of the heat preservation cover, and the spray pipeline is connected with the water tank by the high-pressure water pump, so that the spray conditions can be simulated in the test space, and the humidity conditions of the test environment can be adjusted by the spray pipeline, thereby effectively testing the performance of the sealant under different humidity conditions. Multiple exhaust pipes are installed on the lower part of the heat preservation cover, and the air exchanger is installed in the exhaust pipe, so that the air exchanger can be used to quickly realize the air exchange action, and thus the humidity range in the test environment can be adjusted quickly. Three deformation monitoring members are arranged at the joint between the adjacent two track plates, so that different deformation conditions at the same joint can be collected in real time, and thus the deformation curve can be drawn according to the deformation data obtained during the test, which helps to more accurately analyze the performance of the sealant.Through the control terminal, the test process can be automatically controlled, and thus human interference can be avoided, and the accuracy of test data can be improved.

[0075] The test system has simple structure and low manufacturing cost, and can simulate the performance of the sealant at the joint of the track slab in the ballastless track in a real environment and the deformation of the track slab in the ballastless track in a real environment.

[0076] The application further provides a test method of the sealant for the ballastless track.

[0077] Step one: according to the set experimental parameters, the weight of the counterweight 801 is selected, and the counterweight 801 is assembled in the internal space of the test vehicle body 800;

[0078] Step two: the hoisting device 201 in the forward direction is started to work, the test vehicle body 800 is pulled forward through the corresponding traction rope 202, at the same time, the speed sensor is used to collect the vehicle speed signal of the test vehicle body 800 in real time and send it to the control terminal, and the control terminal obtains the vehicle speed data according to the vehicle speed signal;

[0079] Step three: the control terminal judges whether the current distance of the test vehicle body 800 reaches half of the maximum distance according to the vehicle speed data and the running time, when the current distance reaches half of the maximum distance, the hoisting device 201 in the forward direction is stopped, at the same time, the hoisting device 201 in the backward direction is started to work, the traction rope 202 in the corresponding direction is used to provide a pulling force opposite to the forward direction, so that the test vehicle body 800 slows down in the second half of the track;

[0080] At the same time, the control terminal controls the traction speed of the hoisting device 201 in the backward direction according to the vehicle speed data, so as to ensure that the speed of the test vehicle body 800 is just 0 when reaching the end of the track;

[0081] Step four: steps two and three are repeated for multiple times, so that the test vehicle body 800 reciprocates on the track to run the whole distance, until the set running period is reached and stopped, at the same time, the set temperature condition test operation or the set humidity condition test operation or the set light condition test operation or the composite condition test operation is implemented synchronously during the whole distance of each period, and the experimental parameters are recorded;

[0082] Step five: after the test operation is completed, the performance of the sealant 106 is analyzed according to the obtained experimental parameters, and the performance data of the sealant 106 is obtained.

[0083] In order to effectively test the performance of the sealant under the set temperature condition, in step four, the set temperature condition test operation is implemented as follows:

[0084] The temperature signal inside the heat preservation cover 700 is collected in real time by the temperature sensor and sent to the control terminal. The control terminal obtains the ambient temperature data according to the temperature signal, and compares the set temperature data with the ambient temperature data;

[0085] When the set temperature data is equal to the ambient temperature data, the current state is kept unchanged;

[0086] When the set temperature data is higher than the ambient temperature data, the control terminal controls the heat exchanger to start working, and controls the power of the heat exchanger according to the ambient temperature data. When the ambient temperature data is equal to the set temperature data, the heat exchanger is stopped;

[0087] When the set temperature data is lower than the ambient temperature data, the control terminal controls the refrigeration equipment to start working, and uses the refrigeration equipment to cool the internal space of the heat preservation cover 700. When the ambient temperature data is equal to the set temperature data, the refrigeration equipment is stopped;

[0088] At the same time, the displacement signals of the multiple seams are collected in real time by the multiple sets of linear displacement sensors 601 and sent to the control terminal. The control terminal obtains the displacement data of the seams according to the displacement signals and records them;

[0089] The above actions continue until the set time length is reached.

[0090] In order to effectively test the performance of the sealant under the set illumination condition, in step four, the process of implementing the set illumination condition test operation is as follows:

[0091] The multiple illumination assemblies 500 are controlled to provide the set illumination intensity of the illumination condition. After the set time length is reached, the multiple illumination assemblies 500 are turned off. At the same time, the displacement signals of the multiple seams are collected in real time by the multiple sets of linear displacement sensors 601 and sent to the control terminal. The control terminal obtains the displacement data of the multiple seams according to the displacement signals and records them.

[0092] In order to effectively test the performance of the sealant under the set humidity condition, in step four, the process of implementing the set humidity condition test operation is as follows:

[0093] When continuous spraying condition is needed, the control terminal controls the high-pressure water source to start working, and uses the spraying pipeline to spray liquid on the track plate 104, at the same time, uses multiple groups of linear displacement sensors 601 to collect displacement signals of multiple joints in real time and sends them to the control terminal, the control terminal obtains displacement data of the joints according to the displacement signals and records them; until the set time length is reached, the high-pressure water source is stopped; when spraying, different spraying liquids can be selected, pure water, salt water or liquid with certain acidity can be selected according to needs to test the performance of the sealant more effectively.

[0094] When the humidity condition is needed to be set, the humidity sensor collects the humidity signal inside the heat preservation cover 700 in real time and sends it to the control terminal, the control terminal obtains the environmental humidity data according to the humidity signal and compares the set humidity data with the environmental humidity data; when the set humidity data is equal to the environmental humidity data, the current state is kept unchanged; when the set humidity data is higher than the environmental humidity data, the control terminal controls the ventilation fan to start working, when the environmental humidity data is equal to the set humidity data, the ventilation fan is stopped; when the set humidity data is lower than the environmental humidity data, the control terminal controls the high-pressure water source to start working, and uses the spraying pipeline to carry out humidification operation on the internal space of the heat preservation cover 700, when the current environmental humidity data is equal to the set humidity data, the high-pressure water source is stopped; at the same time, multiple groups of linear displacement sensors 601 are used to collect displacement signals of multiple joints in real time and send them to the control terminal, the control terminal obtains displacement data of the joints according to the displacement signals and records them; the above actions are continued until the set time length is reached.

[0095] In order to test the performance of the sealant more comprehensively, in step four, the composite condition test operation is to implement the set temperature condition test operation, the set humidity condition test operation and the set illumination condition test operation at the same time.

[0096] As a preferred, after the test operation is completed, the long-term deformation image is drawn according to the time sequence displacement data.

[0097] In the present application, during the operation of the test vehicle body, the hoisting device in the forward direction is used to provide acceleration traction to increase the speed in the first half of the journey, the hoisting device in the backward direction is used to provide deceleration traction to reduce the speed in the second half of the journey, and the hoisting device is closed-loop controlled through the speed data fed back by the speed sensor, which can ensure that the test vehicle body can run through the set running interval in each cycle of full journey, and can avoid collision with the concrete platform at the end and the hoisting device. During the operation of each cycle of full journey, the set temperature condition test operation or the set humidity condition test operation or the set illumination condition test operation or the composite condition test operation is simultaneously implemented, which can effectively simulate the performance parameters of the sealant under the set temperature condition, the set humidity condition, the set illumination condition and the composite condition under the running condition, and thus is beneficial to comprehensively evaluate the overall performance of the sealant and is beneficial to ensure that the performance parameters of the sealant can be accurately evaluated before actual use.

[0098] The method has simple implementation process and low implementation cost, and provides an integrated sealant test method for ballastless track, which has artificial control of environmental factors, smaller land occupation than real railway, high safety, low cost and easy measurement. The performance of the sealant can be comprehensively and accurately tested under the condition of artificial control of environmental factors.

Claims

1. A testing system for ballastless track sealant, comprising a track assembly (100), characterized in that, It also includes a thermal insulation cover (700), a test vehicle body (800), a vehicle traction mechanism (200), a lighting component (500), a temperature control component (300), a humidity control component (400), a deformation monitoring component (600), and a control terminal; The track assembly (100) includes a concrete base (102), track slabs (104), tracks (105), and drainage pipes (101); two concrete platforms (103) are poured at both ends of the length direction of the concrete base (102), and two drainage grooves are opened opposite each other in the width direction; multiple track slabs (104) are arranged between the two concrete platforms (103) in sequence, and are laid on the concrete base (102) through an auxiliary pad layer. At the same time, the joints between two adjacent track slabs (104) are sealed and connected by the sealant (106) to be tested; two tracks (105) are installed side by side on the track slabs (104); two pairs of drainage pipes (101) are respectively buried in the two concrete platforms (103), and the inner end of each drainage pipe (101) is connected to the end of the corresponding drainage groove, and the outer end of each drainage pipe (101) extends to the outer end of the concrete platform (103); The heat insulation cover (700) is a box structure with an opening at the bottom. Two pairs of drainage holes are opened at the two ends of its length direction corresponding to the two pairs of drainage pipes (101). The heat insulation cover (700) is covered on the outside of the track assembly (100), and its drainage holes are fitted on the outside of the corresponding drainage pipes (101). At the same time, a test space is formed inside the heat insulation cover (700). The bottom of the test vehicle (800) is equipped with multiple pairs of wheels, which are rolled on two tracks (105). At the same time, speed sensors are mounted on the wheels. Two vehicle traction mechanisms (200) are distributed opposite each other on both sides of the test vehicle body (800); the vehicle traction mechanism (200) includes a winch (201), a connector (203) and a traction rope (202). The winch (201) is fixedly installed on the concrete platform (103); one end of the traction rope (202) is connected to the drum of the winch (201), and the other end is connected to the test vehicle body (800) through the connector (203); Multiple sets of lighting components (500) are installed sequentially and at intervals inside the heat insulation cover (700); The temperature regulation component (300) includes a temperature sensor, a heating unit, and a cooling unit; the temperature sensor is installed inside the insulation cover (700); the heating unit is connected to the insulation cover (700) and is used to increase the temperature in the test space; the cooling unit is connected to the insulation cover (700) and is used to decrease the temperature in the test space. The humidity control assembly (400) includes a humidity sensor, a spray pipe, a high-pressure water source, and an exhaust unit; The humidity sensor is installed inside the heat insulation cover (700); the spray pipe is installed on the top plate inside the heat insulation cover (700); the high-pressure water source is located outside the heat insulation cover (700) and is connected to the water inlet of the spray pipe; the exhaust unit is connected to the heat insulation cover (700) and is used to exhaust the gas inside the test space to the outside. Multiple sets of deformation monitoring components (600) are distributed sequentially at intervals along the length of the concrete base (102), and each set of deformation monitoring components (600) is set at the joint between two adjacent track slabs (104). Each set of deformation monitoring components (600) includes three deformation monitoring elements, which are respectively distributed at both ends and the middle of the joint along its length. The deformation monitoring elements include a linear displacement sensor (601) and a baffle (602). The linear displacement sensor (601) is fixedly installed at the edge of one track slab (104), and the baffle (602) is installed adjacent to the edge of another track slab (104) and connected to the linear displacement sensor (601) through a connecting rod. The control terminal is connected to the hoisting device (201), speed sensor, lighting component (500), temperature sensor, heating unit, cooling unit, humidity sensor and exhaust unit respectively.

2. The testing system for ballastless track sealant according to claim 1, characterized in that, It also includes a counterweight (801), which is assembled in the interior space of the test vehicle body (800); there are two sets of the counterweight (801), which are assembled opposite to each other at both ends of the interior space of the test vehicle body (800); the illumination component (500) is a UV lamp tube and lamp holder; the linear displacement sensor (601) is an LVDT linear displacement sensor.

3. The testing system for ballastless track sealant according to claim 2, characterized in that, The heating unit includes a heat sink (301) and a heat exchanger. Multiple heat sinks (301) are installed sequentially and at intervals inside the insulation cover (700). The heat exchanger is installed outside the insulation cover (700) and is connected to the multiple heat sinks (301) through a heat exchange circulation pipeline passing through the insulation cover (700). At the same time, it is connected to the control terminal.

4. The testing system for ballastless track sealant according to claim 3, characterized in that, The cooling unit includes air ducts (302) and refrigeration equipment. Two air ducts (302) are installed alternately in two upper mounting holes pre-drilled on the upper part of the insulation cover (700). The refrigeration equipment is installed outside the insulation cover (700) and is connected to the two air ducts (302) through air supply pipes and return air pipes respectively. At the same time, it is connected to the control terminal.

5. The testing system for ballastless track sealant according to claim 4, characterized in that, The exhaust unit includes multiple exhaust pipes (401) and multiple ventilation fans. The multiple exhaust pipes (401) are respectively installed in multiple lower mounting holes pre-drilled in the lower part of the insulation cover (700). The multiple ventilation fans are correspondingly installed in the multiple exhaust pipes (401) and connected to the control terminal.

6. A test method for ballastless track sealant, employing the test system for ballastless track sealant as described in claim 5, characterized in that, Includes the following steps: Step 1: Select the weight of the counterweight (801) according to the set experimental parameters, and assemble the counterweight (801) in the internal space of the test vehicle (800); Step 2: The winch (201) controlling the forward direction starts working and pulls the test vehicle (800) forward through the corresponding traction rope (202). At the same time, the speed sensor collects the vehicle speed signal of the test vehicle (800) in real time and sends it to the control terminal. The control terminal obtains the vehicle speed data based on the vehicle speed signal. Step 3: The control terminal determines whether the current travel of the test vehicle (800) has reached half of the maximum travel based on the vehicle speed data and running time. When the current travel reaches half of the maximum travel, the winch (201) controlling the forward direction stops, and at the same time, the winch (201) controlling the backward direction starts working, providing a pulling force opposite to the forward direction through the corresponding traction rope (202), so that the test vehicle (800) decelerates in the second half of the journey. At the same time, the control terminal controls the traction speed of the winch (201) in the reverse direction according to the vehicle speed data to ensure that the speed of the test vehicle (800) is exactly 0 when it reaches the end of the journey; Step 4: Repeat steps 2 and 3 multiple times to make the test vehicle (800) reciprocate on the track for the entire journey until the set running cycle is reached and then stop. At the same time, during the full journey of each cycle, the set temperature condition test, the set humidity condition test, the set light condition test, or the combined condition test are carried out simultaneously, and the experimental parameters are recorded. Step 5: After completing the test, analyze the performance of the sealant (106) based on the obtained experimental parameters and obtain the performance data of the sealant (106).

7. The test method for a ballastless track sealant according to claim 6, characterized in that, Step four involves performing the test under the set temperature conditions as follows: The temperature signal inside the heat insulation cover (700) is collected in real time by a temperature sensor and sent to the control terminal. The control terminal obtains the ambient temperature data based on the temperature signal and compares the set temperature data with the ambient temperature data. When the set temperature data equals the ambient temperature data, the current state remains unchanged; When the set temperature data is higher than the ambient temperature data, the control terminal controls the heat exchanger to start working and controls the power of the heat exchanger in a closed loop according to the ambient temperature data. When the ambient temperature data is equal to the set temperature data, the control terminal controls the heat exchanger to stop. When the set temperature data is lower than the ambient temperature data, the control terminal controls the refrigeration equipment to start working and uses the refrigeration equipment to cool the internal space of the insulation cover (700). When the ambient temperature data is equal to the set temperature data, the refrigeration equipment is controlled to stop. Meanwhile, multiple sets of linear displacement sensors (601) are used to collect displacement signals at multiple joints in real time and send them to the control terminal. The control terminal obtains the displacement data at the joints based on the displacement signals and records them. Continue the above actions until the set duration is reached.

8. The test method for a ballastless track sealant according to claim 6, characterized in that, Step four involves conducting a test to set the lighting conditions as follows: Multiple lighting components (500) are controlled to provide lighting conditions with a set light intensity until the set time is reached. Then, the multiple lighting components (500) are controlled to turn off. At the same time, multiple linear displacement sensors (601) are used to collect displacement signals at multiple joints in real time and send them to the control terminal. The control terminal obtains the displacement data at multiple joints based on the displacement signals and records them.

9. The test method for a ballastless track sealant according to claim 6, characterized in that, Step four involves conducting a humidity condition setting test as follows: When continuous spraying is required, the control terminal controls the high-pressure water source to start working, and sprays liquid onto the track plate (104) through the spray pipe. At the same time, multiple sets of linear displacement sensors (601) collect displacement signals at multiple joints in real time and send them to the control terminal. The control terminal obtains the displacement data at the joints based on the displacement signals and records them. After the set time is reached, the high-pressure water source is controlled to stop. When humidity conditions need to be set, the humidity sensor collects the humidity signal inside the insulation cover (700) in real time and sends it to the control terminal. The control terminal obtains the ambient humidity data based on the humidity signal and compares the set humidity data with the ambient humidity data. When the set humidity data is equal to the ambient humidity data, the current state remains unchanged. When the set humidity data is higher than the ambient humidity data, the control terminal controls the ventilation fan to start working. When the ambient humidity data is equal to the set humidity data, the ventilation fan is controlled to stop. When the set humidity data is lower than the ambient humidity data, the control terminal controls the high-pressure water source to start working and uses the spray pipe to humidify the internal space of the insulation cover (700). When the current ambient humidity data is equal to the set humidity data, the high-pressure water source is controlled to stop. At the same time, multiple sets of linear displacement sensors (601) collect the displacement signals at multiple joints in real time and send them to the control terminal. The control terminal obtains the displacement data at the joints based on the displacement signals and records it. The above actions continue until the set time is reached.

10. The test method for a ballastless track sealant according to claim 6, characterized in that, In step four, the composite condition test operation is to simultaneously perform a set temperature condition test operation, a set humidity condition test operation, and a set light condition test operation.

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