A device for monitoring the location of the dry point of silver salt photosensitive products in a drying cabinet

Abstract

The utility model provides a device for monitoring silver salt photosensitive product drying point position in drying box, can real -time monitoring the temperature in the position range of silver salt photosensitive product conventional drying point in drying box, thereby can monitor whether the specific position of silver salt photosensitive product drying point in drying box changes, and temperature sensor I measures the temperature of silver salt photosensitive product is more accurate.

Description

Technical Field

[0001] This utility model relates to a silver halide photosensitive material coating production line, and more particularly to a device for monitoring the position of the drying point of silver halide photosensitive products inside a drying oven. Background Technology

[0002] In the coating field, the silver halide photosensitive material coating process is one of the more complex processes, including a winding system, a dust removal system, an electrostatic elimination system, a material feeding system, a coating system, a condensation system, a drying system, a balancing system, and a rewinding system. Among these, the silver halide photosensitive material coating process has the most stringent requirements for the drying system. During production, it is essential to ensure that the product is completely dried within a specified range. Otherwise, premature drying will result in defects such as drying haze, cracks, and electrostatic black spots, while delayed drying will lead to problems such as adhesion, ultimately resulting in product scrap. Therefore, the location of the drying point must be strictly controlled during production to ensure the normal performance and appearance quality of the product.

[0003] In existing technologies, the coating process of silver halide photosensitive products mainly relies on a person entering the drying tunnel in a dark room and touching the product to feel the surface temperature to judge the degree of dryness, thereby determining whether the product is completely dry within the specified range. However, this method has many drawbacks: ① Because the location of the dry point touched by an individual varies due to different body temperatures, there will be a certain degree of error in judging the location of the dry point. ② The drying tunnel is a high-temperature environment, and people cannot stay in the drying tunnel for a long time. They can only judge the instantaneous location of the dry point and cannot judge whether the location of the dry point has changed in real time. ③ Silver halide photosensitive products are produced in a dark room environment, but if a person enters the drying tunnel in the dark room, there may be special situations such as accidental light leakage and personnel danger. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a device for monitoring the location of the drying point of silver halide photosensitive products within a drying oven. This device can monitor the temperature within the range of the conventional drying point of the silver halide photosensitive products in the drying oven in real time, thereby enabling the monitoring of whether the specific location of the drying point of the silver halide photosensitive products within the drying oven has changed. Furthermore, the temperature sensor I measures the temperature of the silver halide photosensitive products more accurately.

[0005] The technical solution of this utility model is as follows: a device for monitoring the drying point position of silver halide photosensitive products in a drying oven, including a temperature sensor I, a data acquisition module, and a host computer. The temperature sensor I is installed within the range of the conventional drying point of the silver halide photosensitive products in the drying oven. The host computer is located outside the drying oven. The temperature sensor I is installed below the film / silver halide photosensitive products, and the vertical distance from the detection probe of the temperature sensor I to the film / silver halide photosensitive products is 15cm~20cm. The distance between the temperature sensor I and the guide roller is 3cm~8cm. The temperature sensors I are evenly distributed within the range of the conventional drying point of the silver halide photosensitive products. The data acquisition module is connected to the temperature sensor I and the host computer respectively.

[0006] Temperature sensor I is also installed within the drying oven, covering at least two-thirds of the drying section before and after the location of the conventional drying point of the silver halide photosensitive product. Each drying section is divided into at least three smaller sections, and a temperature sensor I is installed in each of the smaller sections within the monitoring range.

[0007] The data acquisition module is connected to the hot air supply temperature sensor II in the drying section where temperature sensor I is located. The supply air temperature sensor II is located at the air outlet above the drying section. The data acquisition module is also connected to the temperature sensor III of the dehumidification system and the temperature sensor IV of the cold water. The data acquisition module is connected to the host computer via wire II; the data acquisition module is connected to the temperature sensor I via wire I.

[0008] On the host computer, the temperature measured by each temperature sensor I can generate a corresponding temperature-time curve.

[0009] In the width direction of the drying oven, temperature sensor I is located in the middle of the crossbeam inside the drying oven. The middle position of the crossbeam in the drying section is the center position in the width direction of the production line.

[0010] Temperature sensor I is mounted on a mounting bracket, which is installed on a crossbeam inside the drying oven. Temperature sensor I can be adjusted vertically and horizontally on the mounting bracket.

[0011] The mounting bracket is an L-shaped bracket, which includes a horizontal bracket. The horizontal bracket has an elongated hole I along its length. The elongated hole I of the horizontal bracket passes through the temperature sensor I encapsulated by the thread I, and the temperature sensor I is fixed to the horizontal bracket by the nut I corresponding to the thread I.

[0012] The mounting bracket can be adjusted vertically and horizontally.

[0013] The mounting bracket can be adjusted vertically and horizontally, and its structure can be one of the following: (i) The mounting bracket also includes a vertical bracket, which has at least three hollow adjustment holes located on the same vertical line; a U-shaped connecting rod is fitted on the crossbeam of the drying oven. The U-shaped connecting rod includes an upper connecting rod and a lower connecting rod. The upper connecting rod and the lower connecting rod are respectively provided with thread II. The upper connecting rod and the lower connecting rod pass through an adjustment hole of the vertical bracket. By tightening the nut II corresponding to thread II, the mounting bracket is fixed on the crossbeam. When it is necessary to adjust the vertical position of the mounting bracket, loosen the nut II, adjust the height of the adjustment hole through which the upper connecting rod and the lower connecting rod pass, adjust the position of the mounting bracket, and then tighten the nut II. (ii) The vertical support has an elongated hole II along its length; a U-shaped connecting rod is fitted on the crossbeam of the drying oven. The U-shaped connecting rod includes an upper connecting rod and a lower connecting rod. The upper connecting rod and the lower connecting rod are respectively provided with threads II. The upper connecting rod and the lower connecting rod pass through the elongated hole of the vertical support. After adjusting the vertical and horizontal positions of the mounting bracket, the mounting bracket is fixed on the crossbeam of the drying oven by tightening the nut II corresponding to the thread II. When it is necessary to adjust the vertical and horizontal positions of the mounting bracket, loosen the nut II to adjust the position of the mounting bracket, and then tighten the nut II again.

[0014] Temperature sensor I is an infrared thermometer.

[0015] The beneficial effects of this utility model are that it provides a device for monitoring the location of the drying point of silver halide photosensitive products in a drying oven. It can monitor the temperature within the range of the conventional drying point of the silver halide photosensitive products in the drying oven in real time, thereby monitoring whether the specific location of the drying point of the silver halide photosensitive products in the drying oven has changed. Moreover, the temperature sensor I measures the temperature of the silver halide photosensitive products more accurately. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a side view schematic diagram of the installation structure of temperature sensor I.

[0018] Figure 3 This is a bottom-view schematic diagram of the installation structure of temperature sensor I.

[0019] Figure 4 This is a schematic diagram of the connection between temperature sensor I and host computer 302.

[0020] Reference numerals: Drying oven 100, Drying section 9 110, Drying section 10 120, Head section of drying section 9 111, Middle section of drying section 9 112, Tail section of drying section 9 113, Head section of drying section 10 121, Middle section of drying section 10 122, Tail section of drying section 10 123, Crossbeam 130, Guide roller 140, Plate path 150, Wire I 200, Temperature sensor I 201, Mounting bracket 202, U-shaped connecting rod 203, Data acquisition module 300, Wire II 301, Host computer 302. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. It should be understood that the preferred embodiments described herein are only for illustration and explanation of this utility model and should not be construed as limiting the scope of protection of this utility model. Those skilled in the art can make some non-essential improvements and adjustments based on the content of this utility model below. In this utility model, unless otherwise expressly specified and limited, the technical terms used in this application should have the ordinary meaning understood by those skilled in the art.

[0022] like Figures 1-4 As shown, multiple guide rollers 140 are provided along the length of the drying chamber 100. The silver halide photosensitive product 150 to be dried is located above the guide rollers 140. The guide rollers define the path of the silver halide photosensitive product, which is the film path. The drying chamber 100 includes multiple drying sections, each of which is divided into three parts connected in sequence: a head section, a middle section, and a tail section. Each of the head section, middle section, and tail section is provided with a crossbeam 130.

[0023] A device for monitoring the location of the drying point of silver halide photosensitive products inside a drying oven includes a temperature sensor I 201, a data acquisition module 300, and a host computer 302. The temperature sensor I 201 is installed within the drying oven 100 within the range of the normal drying point of the silver halide photosensitive products. The host computer 302 is located outside the drying oven 100. The temperature sensor I 201 is installed below the film path / silver halide photosensitive product 150, and the vertical distance from the detection probe of the temperature sensor I 201 to the film path / silver halide photosensitive product is 15cm to 20cm. The distance between the temperature sensor I 201 and the guide roller 140 is 3cm to 8cm. The temperature sensors I 201 are evenly distributed within the range of the normal drying point of the silver halide photosensitive products. The data acquisition module 300 is connected to both the temperature sensor I 201 and the host computer 302.

[0024] It can monitor the temperature within the normal drying point range of silver halide photosensitive products in the drying oven in real time, thereby monitoring whether the specific location of the drying point of the silver halide photosensitive products in the drying oven has changed, and the temperature sensor I measures the temperature of the silver halide photosensitive products more accurately.

[0025] The distance between temperature sensor I 201 and guide roller 140 is 3cm to 8cm, which effectively avoids temperature detection errors caused by the vibration of the silver halide photosensitive product during production and facilitates installation and disassembly. The distance between the detection probe of temperature sensor I and the film / silver halide photosensitive product is 15cm to 20cm, which ensures the authenticity, stability, and effectiveness of the detection by the temperature sensor I equipment. If the distance is too close, when the silver halide photosensitive product 150 vibrates, it may touch temperature sensor I 201, resulting in surface defects such as scratches and waste. If the distance is too far, because the air outlet of the drying oven 100 is larger than the width of the film, although the hot air blows directly onto the surface of the silver halide photosensitive product from above, excess hot air will diffuse directly to the lower part of the drying oven, i.e., the middle position between temperature sensor I 201 and silver halide photosensitive product 150. This heat will interfere with the accuracy of the detection data.

[0026] Since the coating surface of the silver halide photosensitive product faces upwards and the coating drying process involves surface drying followed by internal drying, the back layer temperature will only be the same as the air supply temperature after complete drying. Therefore, the product can only be considered completely dry when the back layer temperature and air supply temperature are detected to be the same. Thus, the temperature sensor I201 should be installed below the chip / silver halide photosensitive product 150.

[0027] Temperature sensor I201 is also installed within the drying oven, covering at least two-thirds of the drying section before and after the conventional drying point location of the silver halide photosensitive product. This design aims to determine the extent of any deviation in the drying point location, allowing for better production adjustments.

[0028] Each drying section is divided into at least three smaller sections, such as the head section, middle section, and tail section, and a temperature sensor I is installed in each of the smaller sections within the monitoring range.

[0029] If the drying point of the silver halide photosensitive product currently being produced is located within the range from the end of drying segment 9 to the beginning of drying segment 10, then a temperature sensor I is installed at the beginning of drying segment 9 (111), the middle of drying segment 9 (112), the end of drying segment 9 (113), the beginning of drying segment 10 (121), the middle of drying segment 10 (122), and the end of drying segment 10 (123).

[0030] The conventionally defined drying range is from the end of drying section 9 to the beginning of drying section 10. In addition to installing temperature sensor I201 in the section from the end of drying section 9 to the beginning of drying section 10, temperature sensors I201 are also installed in the beginning and middle sections of drying section 9, and the middle and end sections of drying section 10. This is to determine the extent of any deviation in the drying position, allowing for better production adjustments. For example, if the drying point is located in the middle of drying section 9, which is only a small section away from the conventional end of drying section 9, this can be resolved by slightly increasing the machine speed. If the drying point is located in the beginning of drying section 9, then other methods must be considered. If the drying point is located outside of drying sections 9 and 10, then it cannot be adjusted during production and a shutdown is required.

[0031] Furthermore, on the host computer, the temperature measured by each temperature sensor I can generate a corresponding temperature-time curve.

[0032] The detection data is transformed into a more intuitive image for easier observation and judgment: Temperature sensor I 201 converts the detected temperature signal into an electrical signal. Data acquisition module 300 collects the signal emitted by temperature sensor I 201, converts it into digital data that can be recognized and processed by host computer 302, and sends it to host computer 302 via a communication protocol. Host computer 302 reads the data packet sent by the data acquisition module and parses the temperature value contained therein according to the same protocol rules. The parsed temperature value is correlated with the current computer time to form a "data-time" pair, which may be stored in a database or file. The latest "data-time" pair is dynamically plotted as a temperature-time curve on the graphical interface. This allows for real-time observation of the temperature-time curve, revealing the real-time changes in the product surface temperature. It is easy to observe whether temperature anomalies occur from the temperature-time curve. When an anomaly causes temperature changes within the drying section, preventing the product from drying within the specified range, the abnormal information can be quickly and intuitively captured on the display system screen, allowing for immediate intervention and timely loss prevention.

[0033] When an anomaly occurs in the temperature-time curve and the cause needs to be investigated, this will waste valuable production time. Therefore, we can correlate the real-time data graph of some key factors affecting the change of the drying point position with the above temperature-time curve. In this way, when an anomaly occurs, we can immediately know whether the change of the drying position is related to the main factors.

[0034] Some key factors include the temperature of the cold water, the temperature of the hot air used for drying, and the temperature of the dehumidification system. Therefore, the data acquisition module 300 can also be connected to the hot air supply temperature sensor II of the drying chamber, which is located at the air outlet above the drying section. The data acquisition module 301 can also be connected to the temperature sensor III of the dehumidification system and the temperature sensor IV of the cold water. This allows for the acquisition of real-time data graphs of these factors.

[0035] The data acquisition module 300 is connected to the supply air temperature sensor II of the hot air in the drying section where temperature sensor I is located. If the required drying point for the currently produced silver halide photosensitive products is located between the end of drying section 9 and the beginning of drying section 10, then a temperature sensor I is installed at each of the following locations: the beginning (111) of drying section 9, the middle (112) of drying section 9, the end (113) of drying section 9, the beginning (121) of drying section 10, the middle (122) of drying section 10, and the end (123) of drying section 10. The data acquisition module 300 can then be connected to the supply air temperature sensors II of the hot air in drying sections 9 and 10 of the drying chamber, respectively.

[0036] The data acquisition module 300 is connected to the host computer 302 via wire II 301. The data acquisition module 300 is also connected to the temperature sensor I 201 via wire I 200.

[0037] The host computer 302 can be a central control computer 302, or other computers with configuration software, touchscreen HMIs, or paperless recorders. The configuration software is conventional software based on existing technology, such as WinCC, KingSCADA, iFIX, or Ignition. It can also be an existing SCADA system.

[0038] Temperature sensor I 201 is mounted on mounting bracket 202, which is mounted on crossbeam 130 inside the drying oven. Temperature sensor I 201 can be adjusted vertically and horizontally on mounting bracket 202.

[0039] In the width direction of the drying chamber, temperature sensor I is located in the middle of the crossbeam 130 inside the drying chamber. The middle position of the crossbeam 130 in the drying section is the center position in the width direction of the production line; the purpose is to prevent the failure to detect the surface temperature of the passing product when the product width is changed.

[0040] Mounting bracket 202 is an L-shaped bracket, which includes a horizontal bracket 204. The horizontal bracket 204 has an elongated hole I 205 along its length. The elongated hole I of the horizontal bracket passes through the temperature sensor I encapsulated by thread I, and the temperature sensor I is fixed to the horizontal bracket by a nut I 206 corresponding to thread I.

[0041] Mounting bracket 202 can be adjusted vertically and horizontally.

[0042] Mounting bracket 202 also includes a vertical bracket 207, which has at least three hollow adjustment holes located on the same vertical line. A U-shaped connecting rod 203 is fitted onto the crossbeam of the drying oven. The U-shaped connecting rod includes an upper connecting rod 208 and a lower connecting rod 209, each with a thread II. The upper and lower connecting rods pass through an adjustment hole in the vertical bracket. By tightening the nut II 210 corresponding to thread II, the mounting bracket is fixed to the crossbeam. When the vertical position of the mounting bracket needs to be adjusted, the nut II is loosened, the height of the adjustment holes through which the upper and lower connecting rods pass is adjusted, and the position of the mounting bracket is adjusted. Then, the nut II is tightened. When the lateral position of the mounting bracket needs to be adjusted, the nut II is loosened, the connection position between the U-shaped connecting rod and the crossbeam is adjusted, and then the nut II is tightened. The vertical position adjustment achieved by the adjustment holes is coarse adjustment; fine adjustment is achieved through the elongated hole I.

[0043] Alternatively, the vertical support 207 has an elongated hole II along its length. A U-shaped connecting rod 203 is fitted onto the crossbeam of the drying oven. The U-shaped connecting rod includes an upper connecting rod 208 and a lower connecting rod 209, each with a thread II. The upper and lower connecting rods pass through the elongated hole of the vertical support. After adjusting the vertical and horizontal positions of the mounting bracket, the mounting bracket is fixed to the crossbeam of the drying oven by tightening the nut II 210 corresponding to the thread II. When it is necessary to adjust the vertical and horizontal positions of the mounting bracket, loosen the nut II to adjust the position of the mounting bracket, and then tighten the nut II again. At this time, the elongated hole II can also be used for fine adjustment of the vertical position.

[0044] Temperature sensor I201 is an infrared thermometer.

[0045] Temperature sensor I201 is also powered by an external power supply.

[0046] Example 1 The drying oven comprises 12 drying sections. Since the required drying point for the currently produced silver halide photosensitive products is located between the end of drying section 9 and the beginning of drying section 10, products produced outside this range will have quality issues. Therefore, each of the beginning, middle, and end sections of drying sections 9 (110) and 10 (120) is equipped with an infrared thermometer 201, located below the silver halide photosensitive products.

[0047] (I) Verification of the effect of vertical distance between temperature sensor I and silver halide photosensitive product: For verification, testing must be conducted before drying, when the supply air temperature is higher than the temperature of the lower surface of the silver halide photosensitive product, ensuring a reliable comparison. Once drying is complete, the lower surface temperature of the silver halide photosensitive product will remain the same as the supply air temperature, resulting in inaccurate data. Therefore, this experiment will be conducted at the first stage (section 111) of the 9-stage drying process. The overall supply air temperature for the 9-stage drying process is 34℃ (generally, the supply air temperature remains constant for each drying stage, and real-time monitoring is not required). The required error in the measured data should not exceed ±1℃. The experimental data are as follows: Through the above test experiments, the distance between the infrared thermometer 201 and the silver halide photosensitive product 150 should be maintained between 15cm and 20cm. Considering the fluctuation of the chip path, the optimal distance should be 20cm.

[0048] (II) Verification of the effect of the distance between temperature sensor I and the guide roller: The infrared thermometer 201 should be kept within the range of 0cm to 8cm from the guide roller 140. During the production process, the silver halide photosensitive product 150 moves at high speed and is dried by hot air blowing from above. Therefore, some vibration will occur between the two guide rollers 140. The degree of vibration gradually decreases from the middle to the two guide rollers. Therefore, when installing the infrared thermometer 201, try to install it as close as possible to the guide roller 140. The specific data is shown in the table below: Note: The upper connecting surfaces of each guide roller are used as the reference horizontal plane. Based on the actual test data above, considering only the fluctuation range, the distance between the infrared thermometer and the guide roller should be kept within the range of 0cm to 8cm. However, considering the space required for installation and maintenance, and the need for a longer bracket 202 if the distance to the guide roller is too far, which may cause instability in the infrared thermometer during use, the optimal distance should be kept around 5cm, i.e., 3-8cm.

[0049] The above descriptions are merely preferred embodiments of this utility model, not all embodiments. The scope of protection of this utility model is not limited thereto. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model. It should be noted that for those skilled in the art and any person skilled in the art, any equivalent substitutions or changes made based on the technical solutions and utility model concept of this utility model, as well as any changes and improvements made without departing from the overall concept and spirit of this utility model, should also be considered within the scope of protection of this utility model.

Claims

1. A device for monitoring the position of the drying point of silver halide photosensitive products inside a drying oven, characterized in that: The system includes a temperature sensor I (201), a data acquisition module (300), and a host computer (302). The temperature sensor I (201) is installed within the drying oven (100) at the location of the conventional drying point of the silver halide photosensitive product. The host computer (302) is located outside the drying oven (100). The temperature sensor I (201) is installed below the film / silver halide photosensitive product (150), and the vertical distance from the detection probe of the temperature sensor I to the film / silver halide photosensitive product is 15cm~20cm. The distance between the temperature sensor I (201) and the guide roller (140) is 3cm~8cm. The temperature sensors I (201) are evenly distributed within the location of the conventional drying point of the silver halide photosensitive product. The data acquisition module (300) is connected to the temperature sensor I (201) and the host computer (302) respectively.

2. The device for monitoring the drying point location of silver halide photosensitive products inside a drying oven according to claim 1, characterized in that: Temperature sensor I (201) is also installed in the drying oven within at least 2 / 3 of the drying section before and after the location of the conventional drying point of the silver halide photosensitive product. Each drying section is divided into at least three sub-sections, and a temperature sensor I is installed in each sub-section of the monitoring range.

3. The device for monitoring the drying point location of silver halide photosensitive products inside a drying oven according to claim 1 or 2, characterized in that: The data acquisition module (300) is connected to the hot air supply temperature sensor II of the drying section where temperature sensor I is located. The hot air supply temperature sensor II is located at the air outlet above the drying section. The data acquisition module (300) is also connected to the temperature sensor III of the dehumidification system and the temperature sensor IV of the cold water. The data acquisition module (300) is connected to the host computer (302) via wire II (301); the data acquisition module (300) is connected to the temperature sensor I (201) via wire I (200).

4. The device for monitoring the drying point location of silver halide photosensitive products inside a drying oven according to claim 1 or 2, characterized in that: On the host computer, the temperature measured by each temperature sensor I can generate a corresponding temperature-time curve.

5. The device for monitoring the drying point location of silver halide photosensitive products inside a drying oven according to claim 1 or 2, characterized in that: In the width direction of the drying oven, temperature sensor I is located in the middle of the crossbeam (130) inside the drying oven. The middle position of the crossbeam (130) in the drying section is the center position in the width direction of the production line.

6. The device for monitoring the drying point location of silver halide photosensitive products in a drying oven according to claim 5, characterized in that: Temperature sensor I (201) is mounted on mounting bracket (202), which is mounted on crossbeam (130) inside the drying oven. Temperature sensor I (201) can be adjusted vertically and back and forth on mounting bracket (202).

7. The device for monitoring the drying point location of silver halide photosensitive products in a drying oven according to claim 6, characterized in that: The mounting bracket (202) is an L-shaped bracket, which includes a horizontal bracket (204). The horizontal bracket (204) has an elongated hole I (205) along its length. The elongated hole I of the horizontal bracket passes through the temperature sensor I encapsulated by the thread I, and the temperature sensor I is fixed on the horizontal bracket by the nut I (206) corresponding to the thread I.

8. The device for monitoring the drying point location of silver halide photosensitive products inside a drying oven according to claim 6, characterized in that: The mounting bracket (202) can be adjusted vertically and horizontally.

9. The device for monitoring the drying point location of silver halide photosensitive products in a drying oven according to claim 8, characterized in that: The mounting bracket (202) has a vertically and horizontally adjustable structure, which is one of the following: (a) The mounting bracket (202) also includes a vertical bracket (207), which has at least three hollow adjustment holes located on the same vertical line; a U-shaped connecting rod (203) is fitted on the crossbeam of the drying oven. The U-shaped connecting rod includes an upper connecting rod (208) and a lower connecting rod (209). The upper connecting rod and the lower connecting rod are respectively provided with thread II. The upper connecting rod and the lower connecting rod pass through an adjustment hole of the vertical bracket. The mounting bracket is fixed on the crossbeam by tightening the nut II (210) corresponding to the thread II. When it is necessary to adjust the vertical position of the mounting bracket, the nut II is loosened, the height of the adjustment hole through which the upper connecting rod and the lower connecting rod pass is adjusted, the position of the mounting bracket is adjusted, and then the nut II is tightened. (ii) A long strip hole II is provided along the length direction of the vertical support (207); a U-shaped connecting rod (203) is fitted on the crossbeam of the drying oven. The U-shaped connecting rod includes an upper connecting rod (208) and a lower connecting rod (209). The upper connecting rod and the lower connecting rod are respectively provided with threads II. The upper connecting rod and the lower connecting rod pass through the long strip hole of the vertical support. After adjusting the vertical and horizontal positions of the mounting bracket, the mounting bracket is fixed on the crossbeam of the drying oven by tightening the nut II (210) corresponding to the thread II. When it is necessary to adjust the vertical and horizontal positions of the mounting bracket, loosen the nut II to adjust the position of the mounting bracket, and then tighten the nut II again.

10. The device for monitoring the drying point location of silver halide photosensitive products inside a drying oven according to claim 1, characterized in that: Temperature sensor I (201) is an infrared thermometer.

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