Cold-chain logistics detection device and detection method thereof

Abstract

The invention is applied to the technical field of cold-chain logistics, and discloses a cold-chain logistics detection device which comprises a lower shell, an upper shell is arranged at the upper end of the lower shell, a dynamic detection mechanism is arranged in the lower shell, and dynamic monitoring of the temperature state in a container is achieved through jolting of a cold-chain logistics vehicle in the running process. The dynamic detection mechanism comprises a sliding cylinder, and the sliding cylinder is fixedly arranged in the lower shell. According to the detection device for the cold-chain logistics, a sliding rod drives a pressing switch to make contact with a contact plate along with bumping in the vehicle driving process to be triggered to send out an electric signal, and the possibility that complex signal transmission is affected by the environment and fails is avoided; the mode that when the temperature of the cold-chain logistics box rises, a piston rod is pushed by pressure to drive a contact plate to be separated from the sliding range of a pressing switch is utilized, so that the pressing switch cannot be triggered when the temperature of the interior of the cold-chain logistics box rises, and temperature detection is achieved by stopping sending an electric signal.

Description

Technical Field

[0001] The present invention relates to the technical field of cold chain logistics, and in particular to a detection device and a detection method for cold chain logistics. Background Art

[0002] With the rapid development of the modern logistics industry, the importance of cold chain logistics in the fields of food, medicine, etc. has become increasingly prominent. The core of cold chain logistics is to ensure that the goods are always in a specific low-temperature environment throughout the transportation and storage process to ensure the quality and safety of the goods. In the current market environment, the temperature control requirements for cold chain logistics are becoming more and more stringent. On the one hand, the quality and safety of food and medicine are directly related to the health of consumers. For example, if the temperature of fresh food rises during transportation, it may cause bacteria to breed, accelerate spoilage, reduce the nutritional value and taste of food, and even cause serious consequences such as food poisoning. For medicines, especially some biological products and vaccines, strict temperature control is the key to ensure their efficacy and stability. Temperature fluctuations may make the drugs lose their activity and affect the treatment effect. On the other hand, as consumers pay more attention to food quality and drug safety, regulatory authorities have also strengthened their supervision of cold chain logistics. Enterprises need more reliable detection devices and methods to ensure the compliance of cold chain logistics to avoid legal risks and economic losses due to temperature out of control. However, the existing cold chain logistics detection technology has some shortcomings. Traditional temperature detection equipment can often only be used for detection at specific time points or locations, and cannot achieve real-time and continuous monitoring of the entire cold chain process. Moreover, the accuracy and reliability of these devices are limited, and they are easily affected by external environmental factors such as vibration and humidity. In addition, when the temperature recording device is not turned on or turned off in the middle of the transportation, the shipper has no way to monitor the temperature inside the car during transportation, which causes some goods to flow to the market due to temperature damage without being discovered in time, resulting in customer complaints, and there is a large detection blind spot. Summary of the invention

[0003] The purpose of the present invention is to provide a detection device and a detection method for cold chain logistics, so as to solve the problems mentioned in the above background technology that the existing monitoring equipment is greatly affected by the external environment and cannot monitor when the monitoring equipment is turned off.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a detection device for cold chain logistics, comprising a lower shell, an upper shell is arranged at the upper end of the lower shell, and a dynamic detection mechanism is arranged inside the lower shell, so as to realize dynamic monitoring of the temperature state inside the cargo box through the bumps of the cold chain logistics vehicle during driving; The dynamic detection mechanism includes: a sliding cylinder, which is fixedly arranged inside the lower shell body, and a sliding sliding rod is installed on the inner surface of the sliding cylinder, and a push switch is fixedly arranged on the upper end of the sliding rod, a pressure chamber is opened inside the lower shell body, the outer surface of the pressure chamber facing the push switch is penetrated by a piston rod, and a contact plate is fixedly connected to one end of the piston rod facing the push switch, a sliding pressure plate is installed inside one end of the pressure chamber, and a rotating adjusting rod is installed on one end of the pressure plate, and one end of the adjusting rod penetrates the outer surface of the lower shell body.

[0005] Preferably, a spring is connected between the sliding cylinder and the sliding rod, and the sliding cylinder and the sliding rod are concentrically arranged, the piston rod is inclined in design, and the piston rod and the lower shell are connected by sliding friction, and one end of the contact plate is located directly above the push switch.

[0006] By adopting the above technical solution, the push switch can be triggered to send out an electrical signal when sliding up and down when the temperature does not exceed the limit.

[0007] Preferably, the pressure plate is connected to the pressure chamber by sliding friction, the adjustment rod is connected to the lower shell by threaded connection, and an end surface of the adjustment rod located outside the lower shell is flush with the outer surface of the lower shell.

[0008] By adopting the above technical solution, the initial pressure inside the pressure chamber can be adjusted.

[0009] Preferably, an over-temperature marking mechanism is provided at one end of the lower shell, which facilitates monitoring of the temperature inside the cold chain transport vehicle by performing destructive marking when the temperature exceeds the limit.

[0010] By adopting the above technical solution, when the temperature inside the cold chain transport box exceeds the standard, it can be marked to facilitate subsequent inspection.

[0011] Preferably, the over-temperature marking mechanism includes: a voltage transformer chamber, which is opened inside one end of the lower shell body, and a piston column is fixedly provided on the inner surface of the voltage transformer chamber, a sliding piston plate is provided on the inner side of the piston column, and a puncture needle is fixedly provided on the upper surface of the piston plate, the outer surface of the lower shell body is penetrated by an adjusting disk, and the adjusting disk is rotatably connected to the lower shell body, a clearance groove is opened at one end of the adjusting disk located inside the lower shell body, a sliding limit block is installed on the inner surface of one end of the lower shell body where the adjusting disk is located, a mounting block is provided on the upper surface of the lower shell body directly above the puncture needle, and an airbag is clamped and installed inside the lower end of the mounting block.

[0012] By adopting the above technical solution, the airbag can be quickly replaced through the mounting block.

[0013] Preferably, the piston column is located in the middle of the transformer chamber, and the lower end of the piston column is connected to the transformer chamber, and the piston column and the piston plate are connected by sliding friction, the upper end of the puncture needle is arranged opposite to the airbag, and the puncture needle, the clearance groove, the mounting block and the airbag are concentrically arranged, the adjusting disk is connected to the limit block through the clearance groove, and a spring is connected between the limit block and the lower shell, and the mounting block is threadedly connected to the lower shell.

[0014] By adopting the above technical solution, the puncture needle can puncture the airbag when moving upward.

[0015] Preferably, an anti-disassembly mechanism is arranged between the upper shell and the lower shell, and the upper shell is prevented from being disassembled by locking the relative position between the lower shell and the upper shell, and the anti-disassembly mechanism comprises: a fixed seat, the fixed seat is fixedly arranged on the inner surface of the lower end of the upper shell, the upper end surface of the lower shell is fixedly arranged with a plug-in seat and a mounting bracket, the outer surface of the mounting bracket is installed with a sliding sliding bracket, and one end of the sliding bracket is installed with a sliding locking seat, the locking seat and the upper surface of the upper shell are provided with a clearance hole, the upper surface of the mounting bracket is fixedly provided with a baffle, the side surface of the locking seat facing one end of the mounting bracket is provided with a clearance groove, the side surface of one end of the plug-in seat is penetrated by a locking rod, and the locking rod is fixedly connected with a plug-in rod toward one end of the locking seat, the outer surfaces of the two locking seats facing each other are fixedly provided with a plug-in barrel, the outer surface of the upper shell is penetrated by an unlocking rod, and the unlocking rod is made of magnetic material.

[0016] By adopting the above technical solution, the unlocking rod can unlock the card block by magnetic adsorption.

[0017] Preferably, a spring is connected between the fixed seat, the locking seat and the card block, and the fixed seat and the locking seat are mounted in engagement with each other through the card block, the plug-in seat is mounted in engagement with the upper shell, and one end of the upper shell and the plug-in seat is engaged with one end of the locking rod, and a spring is connected between the locking rod and the plug-in seat.

[0018] By adopting the above technical solution, the locking rod can maintain the engagement with the plug-in barrel under the support of the spring to limit the locking seat.

[0019] Preferably, a spring is connected between the mounting frame and the sliding frame, and one end of the sliding frame connected to the locking seat is of columnar design, and the upper surface of the columnar end of the sliding frame fits with the lower surface of the baffle, and the plug-in barrel and the plug-in rod are at the same horizontal height.

[0020] By adopting the above technical solution, the plug-in rod can automatically release the limit on the locking seat after the upper shell is inserted.

[0021] A detection method for a cold chain logistics detection device, the detection method comprising the following steps: S1. During installation, the lower housing is fixed to the inner wall of the cold chain logistics vehicle by bolts; S2. Detect the internal temperature of the cold chain logistics compartment by the electrical signal generated by the press switch; S3. Rotate the adjustment lever to change the initial position of the contact plate to adjust the lower limit of the temperature of the stop trigger press switch; S4. When the goods arrive at the destination, the lower shell and the upper shell are unlocked by inserting the unlocking rod into the hole; S5. Observe the integrity of the airbag to determine whether the temperature of the goods exceeds the upper limit during transportation.

[0022] Compared with the prior art, the invention has the following beneficial effects: the detection device for cold chain logistics: 1. The sliding rod drives the push switch to contact the contact plate as the vehicle bumps during driving, which triggers the sending of electrical signals, thus avoiding the possibility of failure of complex signal transmission due to environmental influences; Furthermore, when the temperature of the cold chain logistics box rises, the piston rod is pushed by pressure to drive the contact plate out of the sliding range of the push switch, so that the push switch cannot be triggered when the temperature inside the cold chain logistics box rises, thereby achieving temperature detection by stopping sending electrical signals; 2. When the temperature of the cold chain logistics box rises, the air in the pressure chamber expands, driving the piston plate and the puncture needle to slide and puncture the airbag. This allows the shipper to detect whether the temperature exceeds the limit during transportation by checking whether the airbag is punctured when the goods arrive, even when the temperature monitoring device is turned off; 3. The upper shell is locked with the fixing seat and the locking seat after installation, so that the installation block cannot be removed, thereby ensuring that the shipper and the consignee will not be unable to accurately monitor the temperature during the transportation process due to the replacement of the airbag by the transporter; Furthermore, by means of the fixing seat and the locking seat not being directly exposed after the upper shell is closed, the lower shell and the upper shell cannot be opened without being damaged, and can only be unlocked by inserting a magnetic unlocking rod at a suitable position; Furthermore, by replacing the upper shell where the locking seat and the fixing seat are located at different unlocking positions, the detection device cannot be cracked by simple attempts, thereby achieving stable maintenance of the locking state of the lower shell and the upper shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the connection between the lower shell and the adjustment rod of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the connection section of the lower housing, the upper housing and the plug socket of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the connection section of the upper shell, the fixing seat and the locking seat of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of the cross-section surface of the connection between the mounting frame, the sliding frame and the locking seat of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the connection section of the plug socket, the locking rod and the plug rod of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the connection section of the pressure-changing chamber, the piston column and the piston plate of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the connection section of the pressure chamber, the piston rod and the contact plate of the present invention; Fig. 9 It is a three-dimensional structural schematic diagram of the connection section of the lower housing, the adjustment plate and the clearance groove of the present invention; Fig.10 It is a schematic diagram of the overall three-dimensional explosion structure of the present invention.

[0024] In the figure: 1. lower shell; 2. upper shell; 3. sliding cylinder; 4. sliding rod; 5. push switch; 6. pressure chamber; 7. piston rod; 8. contact plate; 9. pressure plate; 10. adjusting rod; 11. voltage changing chamber; 12. piston column; 13. piston plate; 14. puncture needle; 15. adjusting plate; 16. clearance groove; 17. limiting block; 18. mounting block; 19. airbag; 20. fixing seat; 21. plug-in seat; 22. mounting frame; 23. sliding frame; 24. locking seat; 25. block; 26. clearance hole; 27. baffle; 28. clearance groove; 29. ​​locking rod; 30. plug-in rod; 31. plug-in barrel; 32. unlocking rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 10 , the present invention provides a technical solution: a detection device for cold chain logistics.

[0027] Embodiment 1: This embodiment discloses a lower shell 1, an upper shell 2 is provided at the upper end of the lower shell 1, and a dynamic detection mechanism is provided inside the lower shell 1 to realize dynamic monitoring of the temperature state inside the cargo box through the bumps during the driving of the cold chain logistics vehicle; The dynamic detection mechanism includes: a sliding cylinder 3, which is fixedly arranged inside the lower shell 1, and a sliding sliding rod 4 is installed on the inner surface of the sliding cylinder 3, and a pressing switch 5 is fixedly arranged on the upper end of the sliding rod 4, a pressure chamber 6 is opened inside the lower shell 1, and the outer surface of the pressure chamber 6 on the side facing the pressing switch 5 is penetrated by a piston rod 7, and a contact plate 8 is fixedly connected to one end of the piston rod 7 facing the pressing switch 5, a sliding pressure plate 9 is installed inside one end of the pressure chamber 6, and a rotating adjustment rod 10 is installed on one end of the pressure plate 9, and one end of the adjustment rod 10 penetrates the outer surface of the lower shell 1; A spring is connected between the sliding cylinder 3 and the sliding rod 4, and the sliding cylinder 3 and the sliding rod 4 are concentrically arranged, the piston rod 7 is inclined, and the piston rod 7 is connected to the lower housing 1 by sliding friction, and one end of the contact plate 8 is located directly above the push switch 5; The pressure plate 9 is connected to the pressure chamber 6 by sliding friction, the adjusting rod 10 is connected to the lower shell 1 by thread, and the end surface of the adjusting rod 10 located outside the lower shell 1 is flush with the outer surface of the lower shell 1; During installation, the lower shell 1 is fixed to the inner wall of the cold chain logistics vehicle by bolts. When the cold chain logistics vehicle is bumped during the forming process, the sliding rod 4 inside the lower shell 1 drives the push switch 5 to slide relative to the sliding cylinder 3 under the action of inertia and squeezes against the contact plate 8. At this time, the push switch 5 is triggered to send an electrical signal to the externally connected controller. When the temperature inside the cold chain logistics box rises and exceeds the upper temperature limit, the air inside the pressure chamber 6 heats up and expands, causing the piston rod 7 to be pushed and drive the contact plate 8 to slide out of the sliding range of the push switch 5, so that the push switch 5 is no longer triggered and stops sending electrical signals. In this way, the temperature inside the cold chain logistics compartment is detected. When it is necessary to adjust the initial position of the piston rod 7 to adjust the upper temperature limit at which the push switch 5 is no longer triggered, the adjusting rod 10 is rotated to drive the pressure plate 9 to slide in the pressure chamber 6, so that the piston rod 7 is pushed or pulled under the action of pressure to change the initial position of the contact plate 8, so that the sliding degree of the contact plate 8 is different under the same temperature rise state.

[0028] Embodiment 2: Based on Embodiment 1, this embodiment discloses that an over-temperature marking mechanism is provided at one end of the lower shell 1, and the temperature inside the cold chain transport box is conveniently monitored by destructively marking when the temperature exceeds the limit; The over-temperature marking mechanism includes: a pressure-changing chamber 11, which is opened inside one end of the lower shell 1, and a piston column 12 is fixedly arranged on the inner surface of the pressure-changing chamber 11, a sliding piston plate 13 is arranged on the inner side of the piston column 12, and a puncture needle 14 is fixedly arranged on the upper surface of the piston plate 13, the outer surface of the lower shell 1 is penetrated by an adjusting disk 15, and the adjusting disk 15 is rotatably connected to the lower shell 1, a clearance groove 16 is opened at one end of the adjusting disk 15 located inside the lower shell 1, a sliding limit block 17 is installed on the inner surface of one end of the lower shell 1 where the adjusting disk 15 is located, a mounting block 18 is arranged on the upper surface of the lower shell 1 just above the puncture needle 14, and an air bag 19 is mounted inside the lower end of the mounting block 18; The piston column 12 is located in the middle of the pressure-changing chamber 11, and the lower end of the piston column 12 is connected to the pressure-changing chamber 11, and the piston column 12 is connected to the piston plate 13 by sliding friction, the upper end of the puncture needle 14 is arranged opposite to the airbag 19, and the puncture needle 14, the clearance groove 16, the mounting block 18 and the airbag 19 are concentrically arranged, the adjustment disk 15 is connected to the limit block 17 by the clearance groove 16, and a spring is connected between the limit block 17 and the lower shell 1, and the mounting block 18 is threadedly connected to the lower shell 1; When the temperature inside the cold chain logistics box rises above the upper temperature limit, the air in the transformer chamber 11 expands due to the heat, pushing the piston plate 13 and the puncture needle 14 to slide up relative to the piston column 12 to puncture the airbag 19. The consignee can judge the temperature change state of the goods during transportation by checking the actual state of the airbag 19. When the airbag 19 needs to be replaced and installed, first open the upper shell 2, then twist the mounting block 18 to make the mounting block 18 disconnected from the lower shell 1, replace the airbag 19 at this time, and then use a tool to push the limit block 17 to make the airbag 19 The adjusting disk 15 loses its engagement and can be rotated, and then the puncture needle 14 is pressed downward by a tool to retract the puncture needle 14, so that the adjusting disk 15 can drive the giving way slot 16 to turn away from the puncture needle 14 and block the puncture needle 14 through the lower surface of the adjusting disk 15, and then the mounting block 18 with the airbag 19 replaced is screwed into the lower shell 1. After the lower shell 1 is placed inside the car to cool down, the adjusting disk 15 is rotated to make the giving way slot 16 engage with the spring-supported limit block 17, so that the puncture needle 14 is no longer blocked and the adjusting disk 15 cannot be rotated.

[0029] Embodiment 3: Based on Embodiment 1 and Embodiment 2, this embodiment discloses that an anti-disassembly mechanism is provided between the upper shell 2 and the lower shell 1, and the upper shell 2 is prevented from being disassembled by locking the relative position between the lower shell 1 and the upper shell 2. The anti-disassembly mechanism includes: a fixed seat 20, the fixed seat 20 is fixedly provided on the inner surface of the lower end of the upper shell 2, the upper end surface of the lower shell 1 is fixedly provided with a plug seat 21 and a mounting frame 22, the outer surface of the mounting frame 22 is provided with a sliding sliding frame 23, and one end of the sliding frame 23 is provided with a sliding locking seat 24, and the locking seat 24 and the fixed seat 20 are facing each other. A sliding block 25 is installed on the outer surface of one side, a clearance hole 26 is opened on the upper surface of the locking seat 24 and the upper shell 2, a baffle 27 is fixedly installed on the upper surface of the mounting frame 22, and a clearance groove 28 is opened on the side surface of one end of the locking seat 24 facing the mounting frame 22, and a locking rod 29 penetrates the side surface of one end of the plug-in seat 21, and the locking rod 29 is fixedly connected to the end of the locking seat 24 with a plug-in rod 30, and a plug-in barrel 31 is fixedly installed on the outer surface of the two locking seats 24 facing each other, and the outer surface of the upper shell 2 is penetrated by an unlocking rod 32, and the unlocking rod 32 is made of magnetic material; A spring is connected between the fixing seat 20 and the locking seat 24 and the clamping block 25, and the fixing seat 20 and the locking seat 24 are mutually engaged and installed through the clamping block 25, the plug-in seat 21 is engaged and installed with the upper shell 2, and one end of the upper shell 2 and the plug-in seat 21 is engaged and installed with one end of the locking rod 29, and a spring is connected between the locking rod 29 and the plug-in seat 21; A spring is connected between the mounting frame 22 and the sliding frame 23, and one end of the sliding frame 23 connected to the locking seat 24 is of columnar design, and the upper surface of the columnar end of the sliding frame 23 fits with the lower surface of the baffle 27, and the plug barrel 31 and the plug rod 30 are at the same level; During installation, first slide the upper shell 2 onto the upper end of the lower shell 1 until the upper end of the lower shell 1 overlaps with the lower end of the upper shell 2. At this time, the end of the upper shell 2 that is engaged with the lower shell 1 squeezes one end of the locking rod 29 inside the plug rod 30, so that one end of the plug rod 30 is disengaged from the plug barrel 31 on the side surface of the locking seat 24. At this time, the locking seat 24 slides through the block 25 and is plugged into the fixed seat 20 under the support and drive of the spring between the sliding frame 23 and the mounting frame 22. At this time, the upper shell 2 cannot slide laterally relative to the lower shell 1 to disengage from the connection with the lower shell 1, and the connection between the sliding frame 23 and the locking seat 24 is blocked by the baffle 27 so that the locking seat 24 will not be disengaged from the connection with the sliding frame 23 due to inversion. When the upper shell 2 needs to be removed, the unlocking rod 32 is inserted into the clearance holes 26 on the upper shell 2 and the locking seat 24. The unlocking rod 32 magnetically attracts the card blocks 25 at the corresponding positions to disengage the fixing seat 20 from the locking seat 24, so that the upper shell 2 can be removed by sliding horizontally. When the unlocking rod 32 is inserted into the clearance hole 26 at a wrong position, the card blocks 25 at the wrong position cannot be driven to slide under the condition of magnetic attraction on both sides, so that the upper shell 2 cannot be disengaged from the lower shell 1. When the locking seat 24 needs to be replaced, the locking seat 24 is slid horizontally so that the groove 28 on the surface of the locking seat 24 slides to the bottom of the baffle 27, and the locking seat 24 is slid upward to let the baffle 27 pass through the groove 28 so that the baffle 27 is disconnected from the sliding frame 23; then the new locking seat 24 is engaged with the sliding frame 23 and installed, and then the locking rod 29 is pushed by a tool, and the locking seat 24 is slid horizontally so that the plug-in barrel 31 is opposite to the plug-in rod 30, and then the locking rod 29 is released. The locking rod 29 slides under the drive of the spring between the plug-in seat 21 so that the plug-in rod 30 is engaged with the plug-in barrel 31, so that the upper shell 2 will not be blocked by the locking seat 24 when it is horizontally inserted into the lower shell 1.

[0030] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and do not limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. A cold chain logistics detection device, comprising a lower shell (1), wherein an upper shell (2) is arranged at the upper end of the lower shell (1), characterized in that: A dynamic detection mechanism is provided inside the lower shell (1), and dynamic monitoring of the temperature state inside the cargo box is achieved through the bumps during the driving of the cold chain logistics vehicle; The dynamic detection mechanism comprises: a sliding cylinder (3), the sliding cylinder (3) is fixedly arranged inside the lower shell (1), and a sliding sliding rod (4) is installed on the inner surface of the sliding cylinder (3), and a push switch (5) is fixedly arranged on the upper end of the sliding rod (4), a pressure chamber (6) is opened inside the lower shell (1), the outer surface of the pressure chamber (6) on the side facing the push switch (5) is penetrated by a piston rod (7), and a contact plate (8) is fixedly connected to one end of the piston rod (7) facing the push switch (5), a sliding pressure plate (9) is installed inside one end of the pressure chamber (6), and a rotating adjustment rod (10) is installed on one end of the pressure plate (9), and one end of the adjustment rod (10) penetrates the outer surface of the lower shell (1).

2. A cold chain logistics detection device according to claim 1, characterized in that: A spring is connected between the sliding cylinder (3) and the sliding rod (4), and the sliding cylinder (3) and the sliding rod (4) are concentrically arranged. The piston rod (7) is of inclined design, and the piston rod (7) and the lower housing (1) are connected by sliding friction. One end of the contact plate (8) is located directly above the push switch (5).

3. A cold chain logistics detection device according to claim 1, characterized in that: The pressure plate (9) is connected to the pressure chamber (6) by sliding friction, the adjustment rod (10) is connected to the lower shell (1) by threaded connection, and an end surface of the adjustment rod (10) located outside the lower shell (1) is flush with the outer surface of the lower shell (1).

4. A cold chain logistics detection device according to claim 1, characterized in that: One end of the lower shell (1) is provided with an over-temperature marking mechanism, which facilitates monitoring of the temperature inside the cold chain transport vehicle box by performing destructive marking when the temperature exceeds a limit.

5. A cold chain logistics detection device according to claim 4, characterized in that: The over-temperature marking mechanism comprises: a variable pressure chamber (11), the variable pressure chamber (11) being arranged inside one end of the lower shell (1), and a piston column (12) being fixedly arranged on the inner surface of the variable pressure chamber (11), a sliding piston plate (13) being arranged inside the piston column (12), and a puncture needle (14) being fixedly arranged on the upper surface of the piston plate (13), an outer surface of the lower shell (1) being penetrated by an adjusting disk (15), and the adjusting disk (15) being rotatably connected to the lower shell (1), a clearance groove (16) being arranged at one end of the adjusting disk (15) located inside the lower shell (1), a sliding limit block (17) being installed on the inner surface of one end of the lower shell (1) where the adjusting disk (15) is located, and a mounting block (18) being arranged on the upper surface of the lower shell (1) directly above the puncture needle (14), and an air bag (19) being mounted in engagement with the lower end of the mounting block (18).

6. A cold chain logistics detection device according to claim 5, characterized in that: The piston column (12) is located in the middle of the pressure-changing chamber (11), and the lower end of the piston column (12) is connected to the pressure-changing chamber (11), and the piston column (12) and the piston plate (13) are connected by sliding friction. The upper end of the puncture needle (14) is arranged opposite to the air bag (19), and the puncture needle (14), the clearance groove (16), the mounting block (18) and the air bag (19) are arranged concentrically. The adjustment disk (15) is connected to the limit block (17) by snapping through the clearance groove (16), and a spring is connected between the limit block (17) and the lower shell (1), and the mounting block (18) and the lower shell (1) are threadedly connected.

7. A cold chain logistics detection device according to claim 1, characterized in that: An anti-disassembly mechanism is provided between the upper shell (2) and the lower shell (1), and prevents the upper shell (2) from being disassembled by locking the relative position between the lower shell (1) and the upper shell (2), the anti-disassembly mechanism comprising: a fixing seat (20), the fixing seat (20) being fixedly provided on the inner surface of the lower end of the upper shell (2), a plug-in seat (21) and a mounting frame (22) being fixedly provided on the upper end surface of the lower shell (1), a sliding sliding frame (23) being installed on the outer surface of the mounting frame (22), and a sliding locking seat (24) being installed on one end of the sliding frame (23), and a sliding block (24) being installed on the outer surface of the locking seat (24) and the fixing seat (20) facing each other. 25), the upper surfaces of the locking seat (24) and the upper shell (2) are provided with a clearance hole (26), the upper surface of the mounting frame (22) is fixedly provided with a baffle (27), the side surface of one end of the locking seat (24) facing the mounting frame (22) is provided with a clearance groove (28), the side surface of one end of the plug-in seat (21) is penetrated by a locking rod (29), and the end of the locking rod (29) facing the locking seat (24) is fixedly connected to a plug-in rod (30), the outer surfaces of the two locking seats (24) facing each other are fixedly provided with a plug-in barrel (31), and the outer surface of the upper shell (2) is penetrated by an unlocking rod (32), and the unlocking rod (32) is made of a magnetic material.

8. A cold chain logistics detection device according to claim 7, characterized in that: A spring is connected between the fixing seat (20) and the locking seat (24) and the clamping block (25), and the fixing seat (20) and the locking seat (24) are mutually engaged and installed via the clamping block (25), the plug seat (21) is engaged and installed with the upper shell (2), and one end of the upper shell (2) and the plug seat (21) engaged and installed is in contact with one end of the locking rod (29), and a spring is connected between the locking rod (29) and the plug seat (21).

9. A cold chain logistics detection device according to claim 7, characterized in that: A spring is connected between the mounting frame (22) and the sliding frame (23), and one end of the sliding frame (23) connected to the locking seat (24) is of columnar design, and the upper surface of the columnar end of the sliding frame (23) is in contact with the lower surface of the baffle (27), and the plug barrel (31) and the plug rod (30) are at the same level.

10. A detection method for a cold chain logistics detection device according to any one of claims 1 to 9, characterized in that: The detection method comprises the following steps: S1. During installation, the lower housing (1) is fixed to the inner wall of the cold chain logistics vehicle by bolts; S2. Detecting the internal temperature of the cold chain logistics compartment by triggering the electrical signal generated by the push switch (5); S3. Rotate the adjustment lever (10) to change the initial position of the contact plate (8) to adjust the lower limit of the temperature of the stop trigger press switch (5); S4. When the cargo arrives at the destination, the lower housing (1) and the upper housing (2) are unlocked by inserting the unlocking rod (32) into the clearance hole (26); S5. Observe the integrity of the airbag (19) to determine whether the temperature of the cargo exceeds the upper limit during transportation.

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