A device for protecting thermal imaging sensor of acid-removing constant volume instrument during power failure

Abstract

A device for power-off protection of thermal imaging sensors of acid-removing constant volume instrument belongs to the field of analytical instruments. It includes a motor and a bracket, a guide plate, a slider, a synchronous wheel frame, a spring wheel shaft, a synchronous wheel shaft, a first and a second synchronous wheels, a synchronous belt and a constant force spring; the motor bracket is fixed on the constant volume instrument cover plate, the motor is fixed on the motor bracket, and the first synchronous wheel is arranged on the motor shaft; a guide plate is arranged on one side of the motor bracket; a slider is arranged on the guide plate; a synchronous wheel frame is arranged on one side of the guide plate; a spring wheel shaft and a synchronous wheel shaft are arranged on the synchronous wheel frame; a constant force spring is mounted on the spring wheel shaft; a second synchronous wheel is mounted on the synchronous wheel shaft; the synchronous belt is mounted between the first synchronous wheel and the second synchronous wheel, and the synchronous belt is fixedly connected to the slider; the end of the constant force spring mounted on the spring wheel shaft is fixedly connected to the slider; when the motor loses power, the slider is retracted by the constant force spring to pull the slider and retract the slider and the infrared thermal imaging sensor to a safe position.

Description

Technical Field

[0001] The utility model belongs to the field of pre-processing analysis instruments, and in particular relates to a protection device for a thermal imaging sensor in an acid-driving and volume-fixing instrument. Background Art

[0002] In the process of microwave chemical sample pretreatment, in order to completely digest samples such as soil, food, medicine or cosmetics, it is usually necessary to add reagents such as nitric acid, hydrofluoric acid, hydrochloric acid or hydrogen peroxide in different proportions according to the national standard method, add the samples and reagents into the reaction tank for closed microwave heating reaction, and finally obtain a completely digested digestion solution.

[0003] Since current analytical instruments such as ICP-MARS (Inductively Coupled Plasma Mass Spectrometry), ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometry) or AAS (Atomic Absorption Spectrometry) have limited tolerance to acid, and high concentrations of acid can easily affect the test results, after the sample is digested, it is generally necessary to go through an "acid removal" process to heat and evaporate the acid in the digestion solution.

[0004] Generally, after digestion is completed, the volume of the digestion liquid is 5-8ml, and it needs to be heated to remove the acid and set the volume to about 0.5ml. After the acid-removing digestion liquid is finally diluted to 25ml or 50ml, it can be tested on the analytical instrument.

[0005] Anyone who has done sample pretreatment knows that removing acid from the sample and settling its volume is a very troublesome task. It usually takes 3-4 hours to remove acid at normal pressure. Moreover, after the digestion solution is heated, the acid inside the liquid will continue to evaporate into acid gas. A large amount of acid gas overflows from the reaction tank, which can easily corrode the surrounding non-corrosion-resistant objects and pollute the laboratory environment.

[0006] In order to determine whether the volume of the digestion solution has been concentrated to about 0.5 ml during the acid removal process, the operator needs to pick it up and observe it frequently, and use manual volume determination. Even if the operator wears gloves, goggles and lab coats, the large amount of acid gas around will still pose a threat to the human body, and safety accidents are likely to occur if you are not careful.

[0007] Previously, the applicant applied for an invention patent with an authorization announcement date of 2024.02.02 and an authorization announcement number of CN113702149B, which discloses "an infrared thermal imaging acid-driving and volume-fixing method". According to the infrared image of the inside of the reaction tank taken by the infrared thermal imaging sensor and the principle of heat absorption by liquid evaporation, when the liquid is heated and evaporated, its surface temperature will be lower than the ambient temperature, and the remaining surface area of ​​the digestion liquid inside the reaction tank can be clearly known. Then, according to the specific shape of the bottom of the reaction tank, the remaining volume of the digestion liquid can be calculated, which plays a role in real-time volume fixing during the acid-driving process. In this technical solution, the infrared thermal imaging sensor is combined with a purge device, so it is not afraid of strong acids and excessively high ambient temperatures that may be encountered during the acid-driving and volume fixing process, which greatly improves the environmental adaptability of the sensor. This technical solution, combined with the specially designed bottom shape of the reaction tank, can meet various volume fixing accuracy calculation requirements through a simple algorithm.

[0008] Based on this method, the applicant has developed a fully automatic acid removal and volume setting instrument, which reduces the acid removal time to about 40 minutes under negative pressure. The entire experimental process is fully automated, and the volume is set based on the infrared image of the inside of the reaction tank taken by the infrared thermal imaging sensor. According to the principle of heat absorption by liquid evaporation, when the liquid is heated and evaporated, its surface temperature will be lower than the ambient temperature, and the remaining surface area of ​​the digestion liquid inside the reaction tank can be clearly known. Then, according to the specific shape of the bottom of the reaction tank, the remaining volume of the digestion liquid can be calculated, which plays a role in real-time volume setting during the acid removal process.

[0009] However, the infrared thermal imaging sensor used in this method is relatively expensive. Once a power outage occurs during the experiment, it may remain above the digestion tank, and its lens will be corroded by acid vapor, causing damage to the device.

[0010] When the power is cut off in the instrument, how to avoid the corrosion of the lens by acid vapor and reduce the maintenance cost of the instrument during use is a technical problem that needs to be solved urgently. Utility Model Content

[0011] The technical problem to be solved by the utility model is to provide a device for power-off protection of thermal imaging sensors of acid removal and volume determination instruments. It adopts a two-way movable slide rail to carry the infrared thermal imaging sensor, uses a motor to drive the infrared thermal imaging sensor to move along the slide rail, and cooperates with a constant force spring to form a protective device for the infrared thermal imaging sensor that is movable just above the reaction tank; when the instrument is normal, the infrared thermal imaging sensor is driven by a motor to move horizontally back and forth just above the reaction tank to perform real-time volume determination; when the instrument suddenly loses power, the torsion of the constant force spring in the device retracts the infrared thermal imaging sensor to a safe position, avoiding the corrosion of the infrared thermal imaging sensor lens by acid vapor, and greatly reducing the maintenance cost.

[0012] The technical solution of the utility model is to provide a device for power failure protection of thermal imaging sensors of acid-removing constant volume instrument, which is characterized by:

[0013] On the top cover of the acid-driving and volume-fixing instrument, a power-off protection device consisting of a motor bracket, a guide plate, a slider, a spring wheel shaft, a synchronous wheel shaft, a synchronous wheel frame, a micro switch, a first synchronous wheel, a second synchronous wheel, a synchronous belt, a motor and a constant force spring is arranged;

[0014] A motor bracket is arranged on the top cover of the acid-removing and volume-fixing instrument; a motor is arranged on the motor bracket; a first synchronous wheel is arranged on the rotating shaft of the motor; and a micro switch is arranged on the motor bracket;

[0015] A guide rail plate is arranged on one side of the motor bracket; a slider is slidably arranged on the guide rail plate; an infrared thermal imaging sensor is arranged on the slider;

[0016] A synchronous wheel frame is arranged on one side of the guide rail plate; a spring wheel shaft and a synchronous wheel shaft are arranged on the synchronous wheel frame; a constant force spring is arranged on the spring wheel shaft; and a second synchronous wheel is arranged on the synchronous wheel shaft;

[0017] A synchronous belt is set between the first synchronous wheel and the second synchronous wheel;

[0018] The synchronous belt is fixedly connected to the slider; the end of the constant force spring which is set on the spring wheel shaft is fixedly connected to the slider.

[0019] Specifically, the motor is used as a main driving device, and drives the synchronous belt to move through the first synchronous wheel, so that the slider connected to the synchronous belt can realize horizontal bidirectional movement on the guide plate;

[0020] When the motor loses power, the constant force spring acts as an auxiliary drive device, and the slider is pulled back by the constant force spring to retract the slider and the infrared thermal imaging sensor to a safe position.

[0021] Specifically, the motor bracket is fixed to the top cover by screws; the motor bracket is provided with a central hole for mounting the motor; the motor bracket is provided with a plurality of through holes for passing the communication line and the power line.

[0022] Furthermore, the guide plate is a strip-shaped structural member, which is fixed to the top cover by screws; the guide plate is arranged along the length direction of the top cover; the plane where the guide plate is located is parallel to the plane where the bottom of the top cover is located; and a center hole for connecting and positioning the vertical screw rod is provided on the guide plate.

[0023] Specifically, the slider is a block-shaped structural part, and a first groove is provided through the slider body; the first groove cooperates with the guide plate; the slider can move bidirectionally along the length direction of the guide plate; a threaded hole is provided on the body of the slider, and the slider is connected to the synchronous belt and the constant force spring through screws; an infrared thermal imaging sensor is provided on the reverse side of the slider; the infrared thermal imaging sensor faces the position of the reaction tank in the top cover.

[0024] Specifically, the synchronous wheel frame is a sheet-like structural member, which is fixed to the top cover by screws; two waist holes are provided on the synchronous wheel frame, and screws pass through the waist holes to fix the synchronous wheel to the top cover; the synchronous wheel frame is provided with a middle mounting hole for fixing the spring wheel axle, and an edge mounting hole for fixing the synchronous wheel axle.

[0025] Specifically, the spring wheel shaft is an axial structure, one end of the spring wheel shaft is fixed on the synchronous wheel frame, and the other end is sleeved with a constant force spring.

[0026] Specifically, the synchronous wheel shaft is a shaft-shaped structural member, one end of the synchronous wheel shaft is fixed on the synchronous wheel frame, and the other end is sleeved with a second synchronous wheel.

[0027] Furthermore, the axial axis of the first synchronous wheel is parallel to the axial axis of the second synchronous wheel; the axial axes of the first synchronous wheel and the second synchronous wheel are perpendicular to the plane where the slider and the guide plate are located.

[0028] Furthermore, a Teflon coating is provided on the surfaces of the motor bracket, the spring wheel shaft and the synchronous wheel shaft.

[0029] Compared with the prior art, the advantages of the utility model are:

[0030] 1. The technical solution of the utility model is that when the instrument is powered off, the constant force spring in the device can retract the infrared thermal imaging sensor to a safe position, thus avoiding the corrosion of its lens by acid vapor and greatly reducing the maintenance cost of the instrument;

[0031] 2. The technical solution of the utility model adopts a dual drive mode of a motor and a constant force spring. The forward and reverse torques of the motor are always greater than the tension of the constant force spring. When working normally, the motor drives the synchronous belt and the connected slider to move left and right along the guide plate through the synchronous wheel; when the motor suddenly loses power, the tension of the constant force spring pulls the slider and the infrared thermal imaging sensor on the slider back to a safe position (away from the top of the reaction tank), thereby realizing the function of safety protection;

[0032] 3. The technical solution of the utility model makes the operation process of the entire device fully automated, greatly improving the experimental work efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0034] Figure 2 It is a structural schematic diagram of the motor bracket of the utility model;

[0035] Figure 3 It is a structural schematic diagram of the guide rail plate of the utility model;

[0036] Figure 4 It is a structural schematic diagram of the slider of the utility model;

[0037] Figure 5 It is a structural schematic diagram of the spring wheel shaft of the utility model;

[0038] Figure 6 It is a structural schematic diagram of the synchronous wheel axle of the utility model;

[0039] Figure 7 It is a structural schematic diagram of the synchronous wheel frame of the utility model;

[0040] Figure 8 It is a schematic diagram of the overall action process of the utility model.

[0041] In the figure, 1 is a motor bracket, 1-1 is a center hole, 2 is a guide plate, 2-1 is a center hole, 3 is a slider, 3-1 is a mounting hole, 3-2 is a large hole, 3-3 is a small hole, 3-4 is a first groove, 3-5 is a threaded hole, 4 is a spring wheel shaft, 4-1 is a first thin shaft, 4-2 is a bearing, 4-3 is a first thick shaft, 4-4 is a second groove, 5 is a synchronous wheel shaft, 5-1 is a second thin shaft, 5-2 is a second bearing, 5-3 is a second thick shaft, 6 is a synchronous wheel frame, 6-1 is a waist hole, 6-2a is a middle mounting hole, 6-2b is an edge mounting hole, 7 is a micro switch, 8a is a first synchronous wheel, 8b is a second synchronous wheel, 9 is a synchronous belt, 10 is a motor, 11 is a constant force spring, and 12 is a top cover. DETAILED DESCRIPTION

[0042] The utility model is further described below in conjunction with the accompanying drawings.

[0043] Figure 1 In the technical solution of the utility model, the protective device is mainly composed of the following parts: a motor bracket 1, a guide plate 2, a slider 3, a spring wheel shaft 4, a synchronous wheel shaft 5, a synchronous wheel frame 6, a micro switch 7, a first synchronous wheel 8a, a second synchronous wheel 8b, a synchronous belt 9, a motor 10 and a constant force spring 11.

[0044] Specifically, a motor bracket 1 is arranged on the top cover 12 of the acid-removing and volume-fixing instrument; a motor is arranged on the motor bracket, and a first synchronous wheel 8a is arranged on the rotating shaft of the motor.

[0045] A micro switch 7 is arranged on the motor bracket.

[0046] The axis of the motor shaft is arranged perpendicularly to the plane where the motor bracket is located; in other words, the rotation axis of the motor is arranged perpendicularly to the plane where the motor bracket is located.

[0047] A guide plate 2 is provided on one side of the motor bracket.

[0048] The guide rail plate is arranged along the length direction of the top cover; and the plane where the guide rail plate is located is arranged parallel to the plane where the bottom of the top cover is located.

[0049] A slider 3 is slidably arranged on the guide rail plate; the slider can slide in both directions along the length direction of the guide rail plate.

[0050] On the reverse side of the slider, an infrared thermal imaging sensor is set (the infrared thermal imaging sensor is Figure 1 Not shown in the figure, its installation position is located on the back of the upper part of the slider in the figure, with four mounting screw holes), which is used to move horizontally back and forth directly above one or more reaction tanks for real-time constant volume.

[0051] The infrared thermal imaging sensor faces the reaction tank ( Figure 1 The several round holes located above the guide plate indicate the positions of several reaction tanks in the top cover.

[0052] On one side of the guide rail plate, a synchronous wheel frame 6 is arranged in parallel, and the synchronous wheel frame is fixed on the top cover by screws.

[0053] The synchronous wheel frame is located below the guide rail plate.

[0054] A spring wheel axle 4 and a synchronous wheel axle 5 are arranged on the synchronous wheel carrier.

[0055] A constant force spring 11 is mounted on the spring wheel shaft; and a second synchronous wheel 8b is mounted on the synchronous wheel shaft.

[0056] A synchronous belt 9 is installed between the first synchronous wheel and the second synchronous wheel.

[0057] The synchronous belt has the first synchronous wheel and the second synchronous wheel as two end points, forming a closed loop reciprocating drive belt; wherein the first synchronous wheel is the driving wheel (main driving wheel) of the synchronous belt, and the second synchronous wheel is the driven wheel.

[0058] Obviously, the radial axes of the first synchronous wheel and the second synchronous wheel coincide with the axial axis of the synchronous belt; meanwhile, the radial axis of the first synchronous wheel and the radial axis of the second synchronous wheel are arranged in parallel.

[0059] The radial axes of the first synchronous wheel and the second synchronous wheel are parallel to or located in the same plane as the sliding track of the slider (or the plane where the guide plate is located); or, the axial axes of the first synchronous wheel and the second synchronous wheel are perpendicular to the sliding track of the slider (or the plane where the guide plate is located).

[0060] The synchronous belt and the slider are fixedly connected.

[0061] When the synchronous belt moves left and right under the rotation of the first synchronous wheel, the driving slider moves horizontally back and forth along the guide rail plate.

[0062] When the motor rotates forward, it drives the synchronous belt to make the connected slider move horizontally on the guide plate (from Figure 1 When the slider approaches the motor bracket and touches the micro switch 7 disposed on the motor bracket, the motor reverses and the slider moves in the opposite direction (from Figure 1 In terms of the central direction, it moves to the right), the infrared thermal imaging sensor connected to the slider can move horizontally back and forth just above the reaction tank.

[0063] The end of the constant force spring set on the spring wheel shaft is connected to the slider. The action process or principle of the slider can be referred to the process of pulling out and automatically retracting the steel tape measure, which will not be described in detail here.

[0064] When the instrument loses power, the motor stops driving, the tension N2 of the constant force spring is greater than the internal resistance N3 of the motor, and the constant force spring connected to the slider retracts, so that the slider and the infrared thermal imaging sensor located thereon can be retracted to a safe position (just like Figure 1 or Figure 8 As shown in the figure, the position on the right side of the figure is a safe position), which avoids corrosion of its lens by acid vapor.

[0065] The various components constituting the device are further described below.

[0066] Figure 2 In the embodiment of the motor support structure, a sheet structure is used, which provides a fixed support for the motor on the one hand and a mounting fulcrum for the micro switch 7 on the other hand.

[0067] The motor bracket is fixed to the top cover 12 by screws.

[0068] The motor bracket is provided with a central hole 1 - 1 on which the motor 10 can be mounted.

[0069] The motor bracket is provided with a plurality of through holes through which the communication lines and the power lines can pass.

[0070] The motor bracket 1 is made of anti-corrosion metal materials such as 316L or titanium alloy, and the surface is sprayed with Teflon to prevent acid.

[0071] Obviously, any structural member that can provide a fixed bracket for the motor and a mounting fulcrum for the micro switch can meet the requirements of the technical solution, and is not limited to Figure 2 The planar sheet structure given in .

[0072] Figure 3 In the figure, the guide rail plate 2 is a strip-shaped structural member, and the strip-shaped guide rail plate is fixed on the top cover by screws.

[0073] The plane where the guide plate is located is kept parallel to the plane where the top cover is located.

[0074] The guide plate is provided with a center hole 2-1, which can be connected to a positioning vertical screw rod (not shown in the figure).

[0075] The material of the guide rail plate 2 can be PP or other materials, as long as the corrosion resistance and strength meet the use requirements.

[0076] The purpose of setting the guide rail plate is to provide a guide carrier or support body that can move left and right for the slider carrying the infrared thermal imaging sensor. Therefore, as long as the structural member can provide a guide or support carrier for the slider, the requirements of the technical solution can be met.

[0077] Figure 4 In the figure, the slider 3 is a block-shaped structural member, and a first groove 3-4 is provided through the slider body, which can cooperate with the guide plate 2 and can slide forward and backward (or move left and right) on the guide plate.

[0078] The slider body is provided with threaded holes 3-5, which are connected to the synchronous belt and the constant force spring through screws. It can be driven by the synchronous belt and can also pull the infrared thermal imaging sensor back to a safe position through the retraction action of the constant force spring when the instrument is powered off.

[0079] The slider is provided with a mounting hole 3-1, which is connected to the infrared thermal imaging sensor by screws.

[0080] The slider is provided with a large hole 3-2 for the infrared thermal imaging sensor to connect to the communication power line; another small hole 3-3 can be passed through the air pipe, and the air pump can blow air to the infrared thermal imaging sensor lens.

[0081] The purpose of setting the slider is to ensure that the infrared thermal imaging sensor located thereon can move left and right along the guide plate.

[0082] The material of the slider 3 is anti-corrosion metal.

[0083] exist Figure 5 In the figure, the spring wheel shaft is an axial structure, one end of which is fixed on the synchronous wheel frame 6, and the other end is provided with a constant force spring 11.

[0084] The first thin shaft 4-1 of the spring wheel shaft is equipped with a first bearing 4-2, which is fixed to the middle mounting hole 6-2a of the synchronous wheel frame 6 (refer to Figure 7 ), stable rotation can be ensured.

[0085] The spring wheel shaft is provided with a first thick shaft 4-3, and a second groove 4-4 is provided on the first thick shaft, on which a constant force spring can be installed.

[0086] The spring wheel shaft 4 is made of anti-corrosion metal materials such as 316L or titanium alloy, and the surface is sprayed with Teflon acid-proof.

[0087] like Figure 6 As shown in FIG. 1 , the synchronous wheel shaft is a shaft-shaped structural member, one end of which is fixed in the adjacent mounting hole 6 - 2 b of the synchronous wheel frame 6 , and the other end is sleeved with a second synchronous wheel 8 b.

[0088] The second thin shaft 5-1 of the synchronous wheel shaft is equipped with a second bearing 5-2, which is fixed at the adjacent mounting hole 6-2b of the synchronous wheel frame to ensure stable rotation.

[0089] The second synchronous wheel 8b is mounted on the second thick shaft 5-3 of the synchronous wheel shaft.

[0090] The synchronous wheel shaft 5 is made of anti-corrosion metal materials such as 316L or titanium alloy, and the surface is sprayed with Teflon to prevent acid.

[0091] like Figure 7 As shown in , the synchronous wheel frame is a sheet-like structural member, and the synchronous wheel frame is fixed to the top cover by screws.

[0092] The synchronous wheel frame is provided with two waist holes 6-1, and screws are arranged through the waist holes to fix the synchronous wheel on the top cover.

[0093] The spring wheel shaft 4 is fixed at the middle mounting hole 6-2a, and the synchronous wheel shaft 5 is fixed at the adjacent mounting hole 6-2b.

[0094] The installation position of the synchronous wheel frame can be fine-tuned by adjusting the relative position between the screw and the waist hole, thereby adjusting the tightness of the synchronous belt.

[0095] The synchronous wheel frame 6 is made of anti-corrosion metal materials such as 316L or titanium alloy, and the surface is sprayed with Teflon to prevent acid.

[0096] The working process and working principle of this technical solution:

[0097] Constant force spring is a specially designed spring. The working principle of constant force spring is based on Hooke's law. Through precise design and calculation, the spring generates constant elastic force and torque when subjected to force. Under the action of external force, the spring deforms and returns to its original shape when the external force disappears (which can be regarded as the action process similar to the spring in a clock, or the pulling out and automatic retraction of a steel tape measure). Due to its stable elastic force and torque output, constant force springs are widely used in various scenarios that require constant support and buffering, providing stable support or movement functions.

[0098] A timing belt is an endless belt with equally spaced side teeth that mesh with the corresponding teeth on the timing pulleys to achieve precise transmission of power and motion. This meshing ensures that there is almost no relative slip between the timing belt and the timing pulleys.

[0099] In this technical solution, when the motor rotates forward or reverse, since the forward and reverse torques of the motor are always greater than the tension of the constant force spring, the motor drives the synchronous belt and the connected slider to move left and right along the guide plate through the synchronous wheel.

[0100] When the motor suddenly loses power, its positive and reverse active torque disappears; at this time, the tension of the constant force spring determines the moving direction of the slider connected to it; by correctly selecting and setting the tension direction of the constant force spring, the safety protection effect of the slider and the infrared thermal imaging sensor located on the slider moving toward a safe position (away from the top of the reaction tank) can be achieved when the motor suddenly loses power.

[0101] Specifically, Figure 8 As shown in the figure, the fully automatic acid-driving and volume-fixing instrument starts to run, the slider 3 is located in the initial safety position, and the synchronous belt set is arranged between the first synchronous wheel 8a and the second synchronous wheel 8b; after the instrument enters the acid-driving and volume-fixing work, the torque N1 of the energized motor is always greater than the tension N2 of the constant force spring, and the motor can drive the synchronous belt to make the connected slider 3 move horizontally on the guide plate 2.

[0102] When the slider 3 hits the micro switch, the motor reverses and the slider 3 moves in the opposite direction, and the infrared thermal imaging sensor connected to the slider 3 can move horizontally back and forth just above the reaction tank. At the same time, the air pump blows air to the lens of the infrared thermal imaging sensor through the air pipe connected to the small hole of the slider 3 to prevent the lens of the infrared thermal imaging sensor from being corroded by acid vapor. When the acid is driven out and the volume is fixed, the system can collect the infrared image detected by the infrared thermal imaging sensor for analysis and processing.

[0103] When the instrument loses power, the motor stops, and the tension N2 of the constant force spring is greater than the internal resistance N3 of the motor. The constant force spring connected to the slider 3 retracts, and the slider 3 and the infrared thermal imaging sensor on the slider can be pulled back (retracted) to a safe position, avoiding corrosion of the lens by acid vapor and greatly reducing maintenance costs.

[0104] In this technical solution, the motor serves as the main driving source and is responsible for driving the synchronous belt through the first synchronous wheel, so that the connected slider can move horizontally in both directions on the guide plate; when the motor loses power, the constant force spring serves as an auxiliary driving device and can pull the slider to retract the slider and the infrared thermal imaging sensor to a safe position together.

[0105] The technical solution of the utility model, by setting a dual driving mode of a motor and a constant force spring, when the instrument is working normally, the motor drives the infrared thermal imaging sensor located on the slider to move horizontally back and forth just above the reaction tank, thereby realizing a normal constant volume function; when the instrument suddenly loses power, the constant force spring retracts the slider and the infrared thermal imaging sensor to a safe position together, thereby realizing an emergency protection function for the infrared thermal imaging sensor.

[0106] The utility model can be widely used in the design and manufacturing fields of automatic acid-removing and volume-fixing instruments.

Claims

1. A device for power failure protection of thermal imaging sensors of acid removal and constant volume instrument, characterized by: On the top cover of the acid-driving and volume-fixing instrument, a power-off protection device consisting of a motor bracket, a guide plate, a slider, a spring wheel shaft, a synchronous wheel shaft, a synchronous wheel frame, a micro switch, a first synchronous wheel, a second synchronous wheel, a synchronous belt, a motor and a constant force spring is arranged; A motor bracket is arranged on the top cover of the acid-removing and volume-fixing instrument; a motor is arranged on the motor bracket; a first synchronous wheel is arranged on the rotating shaft of the motor; and a micro switch is arranged on the motor bracket; A guide rail plate is arranged on one side of the motor bracket; a slider is slidably arranged on the guide rail plate; an infrared thermal imaging sensor is arranged on the slider; A synchronous wheel frame is arranged on one side of the guide rail plate; a spring wheel shaft and a synchronous wheel shaft are arranged on the synchronous wheel frame; a constant force spring is arranged on the spring wheel shaft; and a second synchronous wheel is arranged on the synchronous wheel shaft; A synchronous belt is set between the first synchronous wheel and the second synchronous wheel; The first synchronous wheel is the main driving wheel of the synchronous belt, and the second synchronous wheel is the driven wheel; The synchronous belt is fixedly connected to the slider; the end of the constant force spring which is set on the spring wheel shaft is fixedly connected to the slider.

2. The device for power failure protection of the thermal imaging sensor of the acid removal and constant volume instrument according to claim 1 is characterized in that The motor is used as the main driving device, and drives the synchronous belt to move through the first synchronous wheel, so that the slider connected to the synchronous belt can realize horizontal bidirectional movement on the guide plate; When the motor loses power, the constant force spring acts as an auxiliary drive device, and the slider is pulled back by the constant force spring to retract the slider and the infrared thermal imaging sensor to a safe position.

3. The device for power failure protection of the thermal imaging sensor of the acid removal and constant volume instrument according to claim 1 is characterized in that The motor bracket is fixed on the top cover by screws; the motor bracket is provided with a central hole for installing the motor; the motor bracket is provided with a plurality of through holes for passing the communication line and the power line.

4. The device for power failure protection of the thermal imaging sensor of the acid removal and constant volume instrument according to claim 1 is characterized in that The guide plate is a strip-shaped structural member, which is fixed to the top cover by screws; the guide plate is arranged along the length direction of the top cover; the plane where the guide plate is located is parallel to the bottom of the top cover; and a center hole for connecting and positioning a vertical screw rod is provided on the guide plate.

5. The device for power failure protection of the thermal imaging sensor of the acid removal and constant volume instrument according to claim 1 is characterized in that The slider is a block-shaped structural member, and a first groove is provided through the slider body; the first groove matches with the guide rail plate; the slider can move bidirectionally along the length direction of the guide rail plate; A threaded hole is provided on the body of the slider, and the slider is connected to the synchronous belt and the constant force spring through screws; An infrared thermal imaging sensor is arranged on the reverse side of the sliding block; the infrared thermal imaging sensor faces the position of the reaction tank in the top cover.

6. The device for power failure protection of thermal imaging sensor of acid removal and constant volume instrument according to claim 1, characterized in that The synchronous wheel frame is a sheet-shaped structural member, and the synchronous wheel frame is fixed to the top cover by screws; The synchronous wheel frame is provided with two waist holes, and screws pass through the waist holes to fix the synchronous wheel on the top cover; The synchronous wheel frame is provided with a middle mounting hole for fixing the spring wheel axle, and an edge mounting hole for fixing the synchronous wheel axle.

7. The device for power failure protection of thermal imaging sensor of acid removal and constant volume instrument according to claim 1, characterized in that The spring wheel shaft is an axial structural member, one end of which is fixed on the synchronous wheel frame, and the other end of which is sleeved with a constant force spring.

8. The device for power failure protection of thermal imaging sensor of acid removal and constant volume instrument according to claim 1, characterized in that The synchronous wheel shaft is a shaft-shaped structural member, one end of which is fixed on the synchronous wheel frame, and the other end is sleeved with a second synchronous wheel.

9. The device for power failure protection of thermal imaging sensor of acid removal and constant volume instrument according to claim 1, characterized in that The axial axis of the first synchronous wheel is parallel to the axial axis of the second synchronous wheel; the axial axes of the first synchronous wheel and the second synchronous wheel are perpendicular to the plane where the slider and the guide plate are located.

10. The device for power failure protection of thermal imaging sensor of acid removal and constant volume instrument according to claim 1, characterized in that Teflon coating is provided on the surfaces of the motor bracket, the spring wheel shaft and the synchronous wheel shaft.

Images