Plastic constant-temperature chemical resistance testing equipment

Abstract

The utility model relates to plastic constant-temperature chemical resistance testing equipment which comprises an equipment frame, a tank body assembly, a tank cover assembly and a tank cover lifting assembly, wherein the equipment frame comprises a frame main body and a front door; the tank body assembly comprises a tank body sliding plate guide rail group which is horizontally arranged and extends towards the front door, a tank body which is connected to the tank body sliding plate guide rail group in a sliding manner, a heater which is arranged outside the tank body, and a sample placing rack which is arranged in the tank body and is used for placing a sample; the tank cover assembly comprises a tank cover and a cooling coil which is arranged on the tank cover and can extend into the tank body; an in-tank temperature sensor for detecting the temperature in the tank and a pressure sensor for detecting the pressure in the tank are further arranged on the tank cover; the can cover lifting assembly is used for driving the can cover assembly to ascend and descend so as to achieve can closing and can opening. Compared with the prior art, the device can simulate the application environment of plastics in an automobile thermal management system, and has the characteristics of constant temperature, quick cooling, high sealing maintenance, resistance to corrosion of related solutions in automobile thermal management and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of aging resistance testing, and relates to a plastic constant temperature aging resistance testing device. Background Art

[0002] In the application field of engineering plastics in the automotive thermal management system, relevant components need to maintain their relevant physical properties under high temperature and chemical environments. In order to develop engineering plastics in this field, a device with constant temperature, pressure resistance, high sealing retention, and resistance to relevant chemical corrosion is required to simulate the application scenarios of materials and accelerate the impact of test samples on relevant properties in this environment, so as to foresee in advance the functional failure of samples in this environment and facilitate the development and screening of material formulations. Content of the Utility Model

[0003] The purpose of the utility model is to provide a plastic constant temperature aging resistance testing device, which can simulate the application environment of plastics in the automotive thermal management system, and has the characteristics of constant temperature, rapid cooling, high sealing retention, and resistance to corrosion by relevant solutions in automotive thermal management. In addition, according to the operation requirements of test sample placement and removal, a special test sample placement rack, an automatic lifting device for the tank cover, and an equipment electronic control system are designed.

[0004] The purpose of the utility model can be realized by the following technical solutions:

[0005] A plastic constant temperature aging resistance testing device includes an equipment frame, a tank body assembly, a tank cover assembly, and a tank cover lifting assembly;

[0006] The equipment frame includes a frame main body and a front door arranged on the frame main body;

[0007] The tank body assembly includes a tank body slide rail group horizontally arranged in the frame main body and extending towards the front door, a tank body slide plate slidably arranged on the tank body slide rail group, a tank body arranged on the tank body slide plate, a heater arranged outside the tank body, and a sample placement rack arranged inside the tank body for placing samples;

[0008] The tank cover assembly includes a tank cover and a cooling coil arranged on the tank cover and extending into the tank body;

[0009] The tank cover is also provided with a tank internal temperature sensor for detecting the temperature inside the tank and a pressure sensor for detecting the pressure inside the tank;

[0010] The tank cover lifting assembly is used to drive the tank cover assembly to lift and lower to realize tank closing and opening. Further, the heater is arranged on the outer periphery and the bottom of the tank body;

[0011] An insulating layer and a protective shell are sequentially laid outside the heater.

[0012] Further, an outward-extending ring platform is provided on the outer periphery of the top of the tank body, and an installation hole adapted to the tank body is formed on the tank body slide plate. During assembly, the outward-extending ring platform is lapped on the outer edge of the installation hole.

[0013] Further, a heat insulation installation groove is formed on the outer edge of the installation hole, a heat insulation plate is arranged in the heat insulation installation groove, and the upper and lower sides of the heat insulation plate are respectively abutted against the outward-extending ring platform and the heat insulation installation groove.

[0014] Further, the sample placement rack includes an upper placement ring, a lower placement ring, and a connecting plate arranged between the upper placement ring and the lower placement ring;

[0015] A plurality of assembly holes are correspondingly formed in the circumferential direction on the upper placement ring and the lower placement ring, and the upper and lower ends of the sample are respectively embedded in the corresponding assembly holes;

[0016] The temperature sensor and the cooling coil in the tank extend to the middle of the sample placement rack.

[0017] Further, the equipment further includes a cooling circuit and a condensation assembly;

[0018] The condensation assembly includes a cold water tank and a heat exchange coil arranged in the cold water tank. A cooling water outlet pipe, a cooling water inlet pipe, a heat exchange coil inlet pipe, and a heat exchange coil outlet pipe are arranged on the side wall of the cold water tank in sequence from top to bottom. The cooling water outlet pipe and the cooling water inlet pipe are communicated with the inner cavity of the cold water tank, and the heat exchange coil inlet pipe and the heat exchange coil outlet pipe are communicated with the heat exchange coil;

[0019] The cooling circuit includes a cooling solenoid valve, a cooling passage water outlet valve, a cooling passage water inlet valve, and a chiller;

[0020] The water outlet of the chiller is respectively communicated with the cooling water inlet pipe and the inlet end of the cooling coil, and the cooling solenoid valve and the cooling passage water inlet valve are sequentially arranged between the water outlet of the chiller and the cooling coil;

[0021] The outlet end of the cooling coil is sequentially communicated with the cooling passage water outlet valve and the heat exchange coil inlet pipe;

[0022] The cooling water outlet pipe and the heat exchange coil outlet pipe are respectively communicated with the water inlet of the chiller. Further, a pressure relief valve is further arranged on the tank cover.

[0023] Further, the tank cover assembly further includes a tank cover slide plate for supporting the tank cover,

[0024] The tank cover lifting assembly includes a lifting guide rail group, a screw nut transmission structure, and a lifting motor;

[0025] The lifting guide rail group is erected on the frame main body. The lead screw in the lead screw-nut transmission structure is in transmission connection with the lifting motor, and the nut is fixedly connected with the tank cover slide plate.

[0026] Furthermore, the tank body assembly further includes a plurality of bolts erected on the tank body.

[0027] The tank cover assembly further includes a through hole opened on the tank cover for the bolt to pass through, and a nut screwed on the bolt and used for pressing the tank body and the tank cover.

[0028] Furthermore, the equipment frame further includes a left door and a right door arranged on both sides of the frame main body, a bottom plate arranged at the bottom of the frame main body, and equipment casters arranged at the bottom of the bottom plate.

[0029] Compared with the prior art, the present utility model has the following beneficial effects:

[0030] 1) The present utility model forms a test cavity through the tank body assembly and the tank cover assembly, which can accommodate chemical corrosion solutions and provide a test environment. The tank cover lifting assembly drives the tank cover assembly to lift to facilitate tank closing and opening. By sliding the tank body assembly on the tank body slide rail group extending towards the front door, it is convenient for loading and unloading test samples in the tank body assembly, thereby improving the convenience of sample corrosion resistance testing.

[0031] 2) The present utility model adjusts the temperature of the test environment through a heater arranged outside the tank body, and cooperates with the heat preservation layer and the temperature sensor to achieve a constant temperature effect inside the tank.

[0032] 3) The present utility model achieves the effect of quickly cooling the test environment through the cooling coil arranged on the tank cover and capable of extending into the multiple sample arrangement centers inside the tank body.

[0033] 4) The present utility model realizes high sealing retention inside the tank through the sealing gasket between the tank cover and the tank body.

[0034] To sum up, the present utility model can simulate the application environment of plastics in the automotive thermal management system, and has the characteristics of constant temperature, rapid cooling, high sealing retention, corrosion resistance to relevant solutions in automotive thermal management, etc. In addition, according to the operation requirements for taking and placing test samples, a special test sample placement rack, an automatic tank cover lifting device, and an equipment electric control system are designed to improve the convenience of test operation. Description of the Drawings

[0035] Figure 1 It is a schematic structural diagram of a plastic constant temperature chemical resistance testing device in the sample loading and unloading state of the present utility model.

[0036] Figure 2 It is a front view structural schematic diagram of a plastic constant temperature chemical resistance testing device of the present utility model.

[0037] Figure 3 Schematic rear view structure of a plastic constant temperature and chemical resistant testing device in the present utility model;

[0038] Figure 4 Cross-sectional view of the tank body;

[0039] Figure 5 Schematic structure of a sample placement rack loaded with samples;

[0040] Figure 6 Schematic structure of a plastic constant temperature and chemical resistant testing device in the operating state in the present utility model;

[0041] Figure 7 Schematic structure of the electrical control component;

[0042] Figure 8 Schematic structure of the sample placement rack;

[0043] Figure 9 、 Figure 11 Schematic structure of the tank cover component;

[0044] Figure 10 Schematic structure of the condensation component;

[0045] Description of the markings in the figure:

[0046] Equipment frame 1:

[0047] Frame main body 101, front door 102, left door 104, right door 105, bottom plate 106, equipment casters 107, side plate 108;

[0048] Tank body component 2:

[0049] Tank body 201, heater 202, insulation layer 203, protective shell 204, tank body slide plate 205, drain valve 206, sample placement rack 207, sample 208, heat insulation plate 209, gasket 210, tank body slide plate guide rail group 211, bolt 212, sample rack handle 213;

[0050] Tank cover component 3:

[0051] Tank cover 301, tank cover slide plate 302, cooling passage water outlet valve 303, pressure gauge 304, pressure sensor 305, cooling passage water inlet valve 306, cooling solenoid valve 307, safety valve 308, pressure relief valve 309, bypass valve 310, cooling coil 311, nut 312, cooling water outlet pipe 313, cooling water inlet pipe 314, heat exchange coil inlet pipe 315, heat exchange coil outlet pipe 316, chiller 317;

[0052] Electrical control component 4:

[0053] Operating display screen 401, tank body temperature sensor 404, and in-tank temperature sensor 403;

[0054] Condensation component 5;

[0055] Lid lifting component 6:

[0056] Lifting motor 601, lifting speed reducer 602, lifting guide rail group 603, and connecting plate 604. Specific implementation mode

[0057] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are implemented on the premise of the above technical solutions of the present utility model, and the detailed implementation modes and specific operation processes are given, but the protection scope of the present utility model is not limited to the following embodiments.

[0058] It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0059] Some implementation modes of the present utility model will be described in detail below in conjunction with the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0060] Embodiment 1:

[0061] As Figure 1-3 shown, a plastic constant temperature and chemical resistance testing device includes a device frame 1, a tank body component 2, a tank lid component 3, and a tank lid lifting component 6; the device frame 1 includes a frame main body 101 and a front door 102 provided on the frame main body 101; as Figure 4 , Figure 6 shown, the tank body component 2 includes a tank body slide rail group 211 horizontally arranged in the frame main body 101 and extending in the direction pointing to the front door 102, a tank body slide plate 205 slidably arranged on the tank body slide rail group 211, a tank body 201 arranged on the tank body slide plate 205, a heater 202 arranged outside the tank body 201, and a sample placement rack 207 arranged inside the tank body 201 and used for placing a sample 208; the tank lid component 3 includes a tank lid 301 and a cooling coil 311 arranged on the tank lid 301 and capable of extending into the tank body 201; a tank internal temperature sensor 403 for detecting the temperature inside the tank and a pressure sensor 305 for detecting the pressure inside the tank are also arranged on the tank lid 301.

[0062] During use, the can lid lifting assembly 6 is used to drive the can lid assembly 3 to lift, realizing the combination and separation of the can body assembly 2 and the can lid assembly 3, and further realizing can closing and can opening. After can opening, the can body 201 can be moved to the front door 102 by pushing the can body slide plate 205 along the can body slide plate guide rail group 211, facilitating the operator to take or load materials.

[0063] During normal operation, the pressure generated by the heating of the solution in the can under sealed conditions is detected by a pressure sensor for the air pressure inside the can; there is also a situation where nitrogen or compressed air is filled to a certain pressure value before operation to check whether the sealing state is intact. After the sealing check is okay, it is discharged through the valve and then started. The structure of the filling pipeline and the pressurizing device can select any structure in the prior art that can realize filling 0.1 - 5 MPa of gas into the can.

[0064] In some specific embodiments, the heater 202 is provided on the outer periphery of the can body 201 and at the bottom of the can body 201 to ensure sufficient heating of the materials in the can body 201; a heat insulation layer 203 and a protective shell 204 are sequentially laid outside the heater 202, playing the roles of heat insulation and anti - collision respectively.

[0065] In some specific embodiments, an outward - extending ring platform is provided on the outer periphery of the top of the can body 201, and an installation hole adapted to the can body 201 is opened on the can body slide plate 205. During assembly, the outward - extending ring platform overlaps on the outer edge of the installation hole.

[0066] In some preferred embodiments, a heat insulation installation groove is opened on the outer edge of the installation hole, and a heat insulation plate 209 is provided in the heat insulation installation groove. The upper and lower sides of the heat insulation plate 209 are respectively abutted against the outward - extending ring platform and the heat insulation installation groove, which is used for energy - saving operation, reducing heat loss, and avoiding heat transfer to the can body slide plate 205 to cause damage to the guide rail group of the can body slide plate 205.

[0067] In some specific embodiments, a liquid discharge valve 206 is provided at the bottom of the can body 201, facilitating the discharge of the internal test solution. The communication pipeline between the liquid discharge valve 206 and the bottom of the can body 201 sequentially passes through the heater 202, the heat insulation layer 203, and the protective shell 204.

[0068] In some specific embodiments, as Figure 8 shown, the sample placement rack 207 includes an upper placement ring, a lower placement ring, and a connecting plate provided between the upper placement ring and the lower placement ring; a plurality of assembly holes are correspondingly opened in the circumferential direction on the upper placement ring and the lower placement ring. The upper and lower ends of the sample 208 are respectively embedded in the corresponding assembly holes, and a plurality of samples 208 are arranged circumferentially on the sample placement rack 207. The temperature sensor 403 and the cooling coil 311 inside the can can extend to the middle of the sample placement rack 207 when the can is closed.

[0069] In some specific embodiments, a handle 213 is further provided on the sample placement rack 207 to facilitate the insertion and removal of the sample placement rack 207.

[0070] In some specific embodiments, the device further includes a cooling circuit and a condensation component 5;

[0071] As Figure 10 shown, the condensation component 5 includes a cold water tank and a heat exchange coil disposed within the cold water tank. On the side wall of the cold water tank, a cooling water outlet pipe 313 and a cooling water inlet pipe 314 are provided one above the other, as well as a heat exchange coil inlet pipe 315 and a heat exchange coil outlet pipe 316; the cooling water outlet pipe 313, the cooling water inlet pipe 314 are in communication with the inner cavity of the cold water tank, and the heat exchange coil inlet pipe 315, the heat exchange coil outlet pipe 316 are in communication with the heat exchange coil;

[0072] The cooling circuit includes a cooling solenoid valve 307, a cooling passage outlet valve 303, a cooling passage inlet valve 306, and a chiller 317;

[0073] The outlet of the chiller 317 is respectively in communication with the cooling water inlet pipe 314 and the inlet end of the cooling coil 311. The cooling solenoid valve 307 and the cooling passage inlet valve 306 are sequentially disposed between the outlet of the chiller 317 and the cooling coil 311;

[0074] The outlet end of the cooling coil 311 is sequentially in communication with the cooling passage outlet valve 303 and the heat exchange coil inlet pipe 315;

[0075] The cooling water outlet pipe 313 and the heat exchange coil outlet pipe 316 are respectively in communication with the inlet of the chiller 317.

[0076] In some specific embodiments, a pressure relief valve is further provided on the tank lid 301, more specifically including a manual pressure relief valve 309 that can be manually opened to release the internal pressure; a safety valve 308 that prevents the release of internal high pressure when the heating gets out of control. The manual pressure relief valve 309 and the safety valve 308 are sequentially in communication with the tank lid 301 to facilitate the timely release of the pressure inside the tank.

[0077] In some specific embodiments, a bypass is further provided between the tank lid 301 and the safety valve 308, and a bypass valve 310 is further connected to this bypass. External high-pressure gas can be connected to check whether there is leakage in the connection seal before the equipment runs.

[0078] In some specific embodiments, the outlet end of the cooling passage outlet valve 303 is respectively connected to the safety valve 308 and the cooling water outlet pipe 313 through a three-way valve.

[0079] In some specific embodiments, as Figure 9 、 Figure 11As shown, the lid assembly 3 further includes a lid slide plate 302 for supporting the lid 301. The lid lifting assembly 6 includes a lifting guide rail group 603, a lead screw-nut transmission structure, and a lifting motor 601. The lifting guide rail group 603 is erected on the frame main body 101. The lead screw in the lead screw-nut transmission structure is in transmission connection with the lifting motor 601, and the nut is fixedly connected to the lid slide plate 302.

[0080] During use, the lifting motor 601 can drive the lead screw to rotate, thereby realizing the lifting of the nut and the lid slide plate 302 along the direction of the lead screw.

[0081] In some specific embodiments, the tank body assembly 2 further includes a plurality of bolts 212 erected on the tank body 201. The lid assembly 3 further includes through holes opened on the lid 301 for the bolts 212 to pass through, and nuts screwed on the bolts 212 and used to press the tank body 201 and the lid 301.

[0082] In some more specific embodiments, an annular gasket groove is opened on the tank body 201, and a gasket 210 for sealing the connection between the tank body 201 and the lid 301 is provided in the gasket groove. By tightening the bolts 212 and the nuts, the gasket 210 is in interference contact with the tank body 201 and the lid 301 to ensure the sealing effect.

[0083] In some specific embodiments, the equipment frame 1 further includes a left door 104 and a right door 105 provided on both sides of the frame main body 101, a bottom plate 106 provided at the bottom of the frame main body 101, and equipment casters 107 provided at the bottom of the bottom plate 106.

[0084] In some preferred embodiments, the equipment frame 1 further includes equipment side plates 108 provided on both sides of the frame main body 101 and located below the left door 104 and the right door 105. Preferably, the equipment side plates 108 are made of a transparent material to facilitate observing the internal situation of the equipment.

[0085] In some preferred embodiments, sealing structures such as sealing strips are provided between the left door 104, the right door 105, the front door 102 and the frame main body 101.

[0086] In some more preferred embodiments, through holes communicating with negative pressure devices such as pumps and exhaust fans are opened at the top of the frame main body 101 to provide negative pressure inside the equipment frame 1 and prevent the internal test solution vapor from leaking into the external environment when the equipment seal fails.

[0087] Embodiment 2:

[0088] A plastic constant temperature and chemical resistance test equipment includes an equipment frame 1, a tank body assembly 2, a lid assembly 3, an electrical control assembly 4, a condensation assembly 5, and a lid lifting assembly 6.

[0089] The equipment frame 1 comprises: a frame body 101, a front door 102, a left door 104, a right door 105, a bottom plate 106, equipment casters 107 (4 in number), and a side plate 108. The three-door structure facilitates the bolting operation of the tank cover 301 and the tank body 201.

[0090] In some specific embodiments, the equipment casters 107 are provided with leveling feet to facilitate movement and leveling of the equipment.

[0091] The side panel 108 of the equipment is made of transparent material, which is convenient for observing the internal situation of the equipment. The side panel and the door are provided with a simple sealing structure, and there is a vent on the top to connect the environmental protection equipment. There is a certain amount of ventilation from the bottom to the top of the frame to provide negative pressure to prevent the internal test solution vapor from leaking into the external environment when the equipment seal fails.

[0092] The tank assembly 2 includes: a tank 201, a heater 202, an insulation layer 203, a protective shell 204, a tank slide 205, a drain valve 206, a sample placement rack 207, a sample 208, an insulation board 209, a sealing gasket 210, a tank slide guide rail assembly 211, and bolts 212.

[0093] Heaters 202 are arranged on the periphery and bottom of the tank body 201 , and the heater 202 is wrapped with a heat-insulating layer 203 and a protective shell 204 in sequence, so as to heat, insulate and protect the tank body.

[0094] A drain valve 206 is installed at the bottom of the tank 201 to facilitate the discharge of the internal test solution.

[0095] A sample rack 207 is installed in the tank 201. The structure is a ring cage rack, which can accommodate 100 samples 208 to be tested and arranged along the circumference, so as to facilitate parallel comparison tests of samples 208 of multiple formulations. At the same time, a clearance hole is provided in the middle of the sample rack 207 to facilitate the insertion of the cooling coil 311, so that the sample 208 surrounds the cooling coil 311.

[0096] The tank body 201 is connected and sealed with the tank cover 301. The connection surface between the tank body 201 and the tank cover 301 is provided with a sealing gasket groove and a bolt 212 provided at the periphery of the sealing gasket groove. The sealing gasket 210 is installed in the sealing gasket groove. The connection surface between the tank cover 301 and the tank body is provided with a corresponding boss that matches the sealing gasket groove. A bolt hole is also provided for the bolt 212 to pass through and connect with the nut 312. The tank body 201 and the tank cover 301 are locked and sealed by connecting the bolt 212 and the nut 312.

[0097] The tank body 201 is connected to the tank body slide plate 205. Specifically, an outwardly extending ring platform is provided on the outer periphery of the top of the tank body 201. The tank body slide plate 205 is provided with a mounting hole that matches the main part of the tank body 201. During assembly, the outwardly extending ring platform overlaps the outer edge of the mounting hole.

[0098] An insulating mounting groove is also provided on the outer edge of the mounting hole. An insulating plate 209 is provided in the insulating mounting groove. The upper and lower sides of the insulating plate 209 are respectively abutted against the outward-extending annular platform and the insulating mounting groove, and the insulating plate 209 blocks the heat conduction from the tank body 201 to the tank body slide plate 205.

[0099] The tank body slide plate 205 is installed and connected to the slider of the tank body slide plate guide rail group 211. The guide rail is installed and fixed on the frame main body 101, and the extending direction points to the front door 102. When the tank cover 301 is opened, the tank body 201 can be manually pushed and pulled back and forth along the guide rail, which is convenient for taking and placing the sample 208, internal cleaning and solution discharge.

[0100] The sample placement rack 207 includes an upper placement ring and a lower placement ring, and a connecting plate provided between the upper placement ring and the lower placement ring; a plurality of assembly holes are correspondingly provided in the circumferential direction on the upper placement ring and the lower placement ring. The upper and lower ends of the sample 208 are respectively embedded in the corresponding assembly holes, and a plurality of samples 208 are arranged on the sample placement rack 207 in the circumferential direction. The in-tank temperature sensor 403 and the cooling coil 311 can extend to the middle of the sample placement rack 207 when the tank is closed.

[0101] The tank cover assembly 3 includes: a tank cover 301, a tank cover slide plate 302, a cooling passage water outlet valve 303, a pressure gauge 304, a pressure sensor 305, a cooling passage water inlet valve 306, a cooling solenoid valve 307, a safety valve 308, a pressure relief valve 309, a bypass valve 310, a cooling coil 311, a nut 312, a cooling water outlet pipe 313, a cooling water inlet pipe 314, a heat exchange coil inlet pipe 315, a heat exchange coil outlet pipe 316, a chiller 317, and an in-tank temperature sensor 403.

[0102] A cooling circuit is installed on the tank cover 301, including: a cooling solenoid valve 307, which is controlled by an electrical control system; a cooling passage water outlet valve 303 and a cooling passage water inlet valve 306, which control the magnitude of the cooling flux; a cooling coil 311, which is immersed in the solution in the tank and quickly cools the solution. The cooling circuit is connected to the condensation assembly 5 through a pipeline.

[0103] A pressure relief valve is installed on the tank cover 301, including: a manual pressure relief valve 309, which can be manually opened to release the internal pressure; a safety valve 308, which prevents the release of internal high pressure when the heating gets out of control. The bypass valve 310 can be connected to external high-pressure gas and is used to check whether there is leakage in the connection seal before the equipment runs.

[0104] A pressure and temperature detection component is installed on the can lid 301, specifically including a mechanical pressure gauge 304 and a pressure sensor 305 for detecting the internal pressure of the tank body, and a temperature sensor 403 inside the tank, which extends into the middle of the cooling coil 311. After the tank body 201 and the can lid 301 are assembled, they can be immersed in the solution inside the tank body 201 to measure the solution temperature. Among them, the solution can be a test solution for providing a test environment for the sample 208.

[0105] In the same connection method as the tank body 201 and the tank body slide plate 205, the can lid 301 and the can lid slide plate 302 are also installed and connected through corresponding protruding ring platforms and installation holes, and corresponding heat insulation plates are provided at the connection, with the same function as the heat insulation plate 209.

[0106] The tank body slide plate 302 is installed and connected to the slider of the lifting guide rail group 603 through an L-shaped connecting plate 604. At the same time, the tank body slide plate 302 is also connected to the screw rod on the lifting speed reducer 602 through a screw nut. When the lifting speed reducer 602 works, it can move the can lid assembly 3 up and down along the lifting guide rail group 603.

[0107] The can lid lifting assembly 6 includes: a lifting motor 601, a lifting speed reducer 602, a lifting guide rail group 603, and a connecting plate 604. The lifting motor 601 drives the output rotation of the lifting speed reducer 602, and the screw rod of the lifting speed reducer 602 pushes and pulls the can lid slide plate 302 up and down through a screw nut. Preferably, the lifting motor 601 is controlled by an electrical system, and can achieve one-key up and down in place, and jog up and down functions.

[0108] The inside of the condensation assembly 5 is connected to the equipment cooling circuit and the tank body pressure relief pipeline, and the outside is connected to the chiller and the sewage pipeline, for condensing the steam discharged from the cooling circuit and the pressure relief pipeline into a liquid state and then discharging it.

[0109] In some specific embodiments, such as Figure 7 shown, the electrical control component 4 mainly includes: a switching power supply, a PLC, an operation touch display screen 401, a power regulator, a pressure sensor 305, a temperature sensor 403 inside the tank and a temperature sensor 404 of the tank body, and a servo driver.

[0110] The equipment operation screen includes: Home, Trend, Data, Settings, Alarm. The main page displays the equipment status and temperature and pressure data, as well as the input and operation buttons for the running related setting data. The trend page displays the real-time and historical data curves for quickly viewing the data overview. The data page displays the detailed data records, and the data can be retrieved and exported. The settings page sets the equipment operation, safety alarm limit parameters, and some function selection switches. The alarm page records and displays all alarm information.

[0111] Temperature control of the control system. A tank body temperature sensor 403 and a temperature sensor 404 inside the tank are installed. Cascade PID control is adopted to quickly raise the temperature of the solution in the tank body and avoid overshoot. During the operation process, the solution temperature can be stabilized within ±0.1°C of the set value.

[0112] Timed operation and shutdown function of the equipment. When the temperature inside the equipment tank reaches the set value, timing starts (the start of timing can be selected). When the operation time reaches the set value, the equipment automatically shuts down and the cooling circuit is opened (natural cooling can be selected). At the same time, the alarm prompt sound is turned on to remind the operator.

[0113] Alarm and shutdown function. When it is detected that the pressure inside the tank, the temperature inside the tank, and the temperature of the tank body exceed the set values, an alarm will be generated, the heater will stop working, and the cooling circuit will be opened to ensure the safe operation of the equipment in terms of electrical control.

[0114] Equipment operation

[0115] Clean the tank body and fill it with the required amount of solution. Install the sample on the sample placement rack according to the marked position, then place the sample and the sample placement rack into the solution in the tank body. Operate the tank cover assembly to descend to the connection position with the tank body, lock the connection bolts between the tank body and the tank cover, and fill with high-pressure gas to check for leaks. Set the test operation duration and test temperature, check the operation parameters and safety limit parameters, and start the equipment operation. After the equipment operation reaches the set time, stop heating. After cooling to room temperature, the tank cover can be opened, and the test sample can be taken out for physical property-related detection.

[0116] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the utility model. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative labor. Therefore, the present utility model is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present utility model according to the disclosure of the present utility model should be within the protection scope of the present utility model.

Claims

1. A plastic constant temperature and chemical resistance testing device, characterized in that, It includes an equipment frame (1), a tank body assembly (2), a tank cover assembly (3), and a tank cover lifting assembly (6); The equipment frame (1) includes a frame main body (101) and a front door (102) provided on the frame main body (101); The tank body assembly (2) includes a tank body slide rail group (211) horizontally arranged inside the frame main body (101) and extending in the direction pointing to the front door (102), a tank body slide plate (205) slidably arranged on the tank body slide rail group (211), a tank body (201) arranged on the tank body slide plate (205), a heater (202) arranged outside the tank body (201), and a sample placement rack (207) arranged inside the tank body (201) and used for placing samples (208); The tank cover assembly (3) includes a tank cover (301), and a cooling coil (311) arranged on the tank cover (301) and capable of extending into the tank body (201); The tank cover (301) is also provided with an in-tank temperature sensor (403) for detecting the temperature inside the tank and a pressure sensor (305) for detecting the pressure inside the tank; The tank cover lifting assembly (6) is used to drive the tank cover assembly (3) to lift and lower, so as to realize tank closing and opening.

2. The plastic constant temperature and chemical resistance testing equipment according to claim 1, characterized in that The heater (202) is arranged on the outer periphery of the tank body (201) and at the bottom of the tank body (201); A heat preservation layer (203) and a protective shell (204) are sequentially laid outside the heater (202).

3. The plastic constant temperature and chemical resistance testing equipment according to claim 1, characterized in that, An outward-extending ring platform is arranged on the outer periphery of the top of the tank body (201), and an installation hole adapted to the tank body (201) is opened on the tank body slide plate (205). During assembly, the outward-extending ring platform overlaps on the outer edge of the installation hole.

4. The plastic constant temperature and chemical resistance testing equipment according to claim 3, characterized in that An insulating installation groove is opened on the outer edge of the installation hole, and an insulating plate (209) is arranged in the insulating installation groove. The upper and lower sides of the insulating plate (209) are respectively abutted against the outward-extending ring platform and the insulating installation groove.

5. The plastic constant temperature and chemical resistance testing equipment according to claim 1, characterized in that, The sample placement rack (207) includes an upper placement ring and a lower placement ring, and a connecting plate arranged between the upper placement ring and the lower placement ring; A plurality of assembly holes are correspondingly opened in the circumferential direction on the upper placement ring and the lower placement ring, and the upper and lower ends of the sample (208) are respectively embedded in the corresponding assembly holes; The in-tank temperature sensor (403) and the cooling coil (311) extend to the middle of the sample placement rack (207).

6. The plastic constant temperature and chemical resistance testing equipment according to claim 1, characterized in that This equipment also includes a cooling circuit and a condensation assembly (5); The condensation assembly (5) includes a cold water tank and a heat exchange coil arranged in the cold water tank. A cooling water outlet pipe (313) and a cooling water inlet pipe (314), as well as a heat exchange coil inlet pipe (315) and a heat exchange coil outlet pipe (316) are arranged on the side wall of the cold water tank, one above the other; the cooling water outlet pipe (313), the cooling water inlet pipe (314) are communicated with the inner cavity of the cold water tank, and the heat exchange coil inlet pipe (315), the heat exchange coil outlet pipe (316) are communicated with the heat exchange coil; The cooling circuit includes a cooling solenoid valve (307), a cooling passage outlet valve (303), a cooling passage inlet valve (306), and a chiller (317); The water outlet of the chiller (317) is respectively communicated with the cooling water inlet pipe (314) and the water inlet end of the cooling coil (311). The cooling solenoid valve (307) and the cooling passage inlet valve (306) are sequentially arranged between the water outlet of the chiller (317) and the cooling coil (311). The water outlet end of the cooling coil (311) is sequentially communicated with the cooling passage outlet valve (303) and the heat exchange coil inlet pipe (315). The cooling water outlet pipe (313) and the heat exchange coil outlet pipe (316) are respectively communicated with the water inlet of the chiller (317).

7. The plastic constant temperature and chemical resistance testing equipment according to claim 1, characterized in that, A pressure relief valve is further provided on the tank cover (301).

8. The plastic constant temperature and chemical resistance testing equipment according to claim 1, characterized in that The tank cover assembly (3) further includes a tank cover slide plate (302) for supporting the tank cover (301). The tank cover lifting assembly (6) includes a lifting guide rail group (603), a screw-nut transmission structure, and a lifting motor (601). The lifting guide rail group (603) is erected on the frame main body (101). The screw in the screw-nut transmission structure is in transmission connection with the lifting motor (601), and the nut is fixedly connected with the tank cover slide plate (302).

9. The plastic constant temperature and chemical resistance testing device according to claim 1, characterized in that The tank body assembly (2) further includes a plurality of bolts (212) erected on the tank body (201). The tank cover assembly (3) further includes a through hole opened on the tank cover (301) for the bolt (212) to pass through, and a nut screwed on the bolt (212) and used for pressing the tank body (201) and the tank cover (301).

10. The plastic constant temperature and chemical resistance testing equipment according to claim 1, characterized in that, The equipment frame (1) further includes a left door (104) and a right door (105) arranged on both sides of the frame main body (101), a bottom plate (106) arranged at the bottom of the frame main body (101), and equipment casters (107) arranged at the bottom of the bottom plate (106).

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