Tin coating device for tail end of lead of temperature sensor

Abstract

The invention relates to the technical field of sensors, in particular to a temperature sensor wire tail end tin coating device which comprises a base, a tin pot is fixedly connected to the base, a blocking cover is rotatably connected to one side of the base, a moving frame is arranged on one side of the base, and a rotating frame is rotatably connected to the moving frame. The other end of the rotating frame is fixedly connected with a fixing seat, the lower surface of the fixing seat is fixedly connected with a fixing sleeve, a temperature sensor is clamped in the fixing sleeve, a contact head is arranged in the fixing sleeve in a sliding fit mode, the fixing seat is rotatably connected with a transmission mechanism, and a pressurizing plug is arranged on the outer wall of the fixing sleeve in a sliding fit mode. The pressurizing plug is arranged in the tin pot to pressurize the interior of the tin pot, tin liquid can quickly and uniformly permeate into a multi-strand structure at the tail end of a lead of the temperature sensor, tinning efficiency and quality are improved, tinning time is shortened by the pressurizing plug, oxidation pollution is reduced, consistency of welding quality is improved, and accordingly performance and reliability of the temperature sensor are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and particularly to a tinning device for the end of a temperature sensor wire. Background Art

[0002] A temperature sensor is an electronic component used to measure and monitor temperature, which can convert temperature changes into measurable electrical signals (such as voltage, current, or resistance, etc.). Temperature sensors are widely used in various fields such as industry, household appliances, automobiles, medical equipment, etc., for accurate temperature measurement and control.

[0003] Tinning the end of a temperature sensor wire refers to the process of soldering the end of the temperature sensor wire. This process usually involves immersing or contacting the metal end of the temperature sensor wire into molten tin to form a uniform tin coating. This coating helps to enhance the contact between the wire and other circuits or connectors, ensuring good electrical connection and preventing corrosion at the end of the wire. The tinning process is very important for improving welding performance and the durability of the wire.

[0004] The prior art document with the publication number CN204934799U provides a tinning device for the end of a temperature sensor wire, which uses a motor and a rotating shaft to form a lifting device, capable of fixing and lowering the wire. There is a tin trough at the bottom for convenient automatic soldering, and it has the characteristics of easy use, simple operation, strong automation, and good practicality.

[0005] In many temperature sensors, especially thermocouple or RTD (resistance temperature detector) type sensors, the end of the wire often uses a multi-strand wire structure. In the prior art, when in use, the end of the wire is directly inserted into the molten tin for tinning. The multi-strand wire structure has multiple fine metal wires, and the molten tin may not be able to quickly and evenly penetrate to the contact surface of each wire during the immersion process. Especially when the density of the wire is high, the molten tin may only penetrate to the surface or some parts, resulting in some areas inside not being fully tinned. This may cause poor contact and affect the electrical performance.

[0006] In summary, in the prior art, there is a lack of a technology for applying pressure tinning to the multi-strand end of a temperature sensor wire. Summary of the Invention

[0007] The purpose of the present invention is to solve the drawbacks existing in the background art, and to propose a tinning device for the end of a temperature sensor wire.

[0008] To achieve the above object, the technical solution adopted by the present invention is as follows: A tinning device for the end of a temperature sensor wire, comprising a base, on which a tin pot is fixedly connected. On one side of the base, a cover is rotatably connected. On one side of the base, a moving frame is provided. On the moving frame, a rotating frame is rotatably connected. At the other end of the rotating frame, a fixed seat is fixedly connected. On the lower surface of the fixed seat, a fixed sleeve is fixedly connected. A temperature sensor is clamped in the fixed sleeve. A contact head is slidably fitted in the fixed sleeve. On the fixed seat, a transmission mechanism is rotatably connected. A pressure plug is slidably fitted on the outer wall of the fixed sleeve.

[0009] Preferably, the lower surface of the cover is in sliding contact with the top opening of the tin pot. One end of the cover is fixedly connected with a rotating shaft, and the bottom end of the rotating shaft is rotatably connected with the base. At the bottom end of the rotating shaft, a driven wheel is fixedly connected. On one side of the driven wheel, a driving wheel is meshed and driven. On the driving wheel, a universal joint A is fixedly connected. The universal joint A is rotatably connected with the base. At the other end of the universal joint A, a transmission rod is fixedly connected. A feeding port is opened on the cover, and a sealing plug is movably inserted in the feeding port.

[0010] Preferably, one end of the moving frame is fixedly connected with an electric push rod, and the other end of the electric push rod is fixedly connected with the base.

[0011] Preferably, at the end where the rotating frame is connected to the moving frame, a transmission sleeve is fixedly connected. The inner wall of the transmission sleeve is slidably fitted with the outer wall of the transmission rod. A direction-changing groove is opened on the outer wall of the transmission sleeve, which consists of a straight part and a spiral part. On the base, a fixed rod is fixedly connected. At the top end of the fixed rod, a guiding head is fixedly connected. The guiding head is slidably fitted with the inner wall of the direction-changing groove.

[0012] Preferably, the fixed seat is slidably fitted with the top opening of the tin pot. On the fixed seat, a hydraulic rod is fixedly connected. The output end of the hydraulic rod passes through the upper surface of the fixed seat and extends downward to be fixedly connected with the pressure plug.

[0013] Preferably, a plurality of clamping strips are slidably fitted in an annular structure on the inner wall of the fixed sleeve. The outer ends of the clamping strips are in movable contact with the temperature sensor. The inner ends of the clamping strips are fixedly connected with two springs, and the other ends of the springs are fixedly connected with the inner wall of the fixed sleeve. The upper and lower ends of the clamping strips are provided with inclined surfaces.

[0014] Preferably, the bottom end of the contact head is in movable contact with the temperature sensor. The top end of the contact head is fixedly connected with a contact frame. The contact frame is slidably fitted with the inner wall of the fixed sleeve. On one side of the contact frame, a tension spring is fixedly connected. The other end of the tension spring is fixedly connected with the inner wall of the fixed sleeve.

[0015] Preferably, the transmission mechanism includes a universal joint B, which is rotatably connected to the fixed seat. One end of the universal joint B is fixedly connected with a driving wheel, and the other end of the universal joint B extends into the fixed seat and is fixedly connected with a transmission wheel. One side of the transmission wheel is meshed and driven with an adjusting wheel. One end of the adjusting wheel is fixedly connected with a rotating rod, one end of the rotating rod is rotatably connected to the inner wall of the fixed seat, and the other end of the rotating rod extends into the fixed sleeve and is fixedly connected with a shifting rod, and the shifting rod is in movable contact with the contact frame.

[0016] Preferably, the outer circle of the pressure plug is in sliding fit with the inner wall of the tin pot, and a transmission rack is fixedly connected to the upper surface of the pressure plug, and the transmission rack is meshed and driven with the driving wheel.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. By setting the pressure plug, after inserting the tail end of the temperature sensor wire into the tin liquid, the pressure plug is used to move in the tin pot to pressurize the tin pot, so that the tin liquid can quickly and evenly penetrate into the multi-strand wire structure at the tail end of the temperature sensor wire, improving the efficiency and quality of tinning. The pressure plug not only shortens the tinning time, reduces the risks of cold soldering and false soldering, but also ensures more thorough coverage of the tin liquid, reduces oxidation pollution, and improves the consistency of welding quality, thereby improving the performance and reliability of the temperature sensor;

[0019] 2. By setting the contact head, while the pressure plug moves and pressurizes, the transmission mechanism cooperates with the tension spring to drive the contact head to continuously knock on the temperature sensor, causing it to vibrate slightly. This can further improve the permeability, fluidity and uniformity of the tin liquid during the tinning process. The addition of slight vibration helps to eliminate bubbles and impurities, improves welding quality, avoids cold soldering and false soldering, improves the electrical performance and mechanical strength of the welding point, and further improves the overall reliability of the temperature sensor, making the welding process not only more efficient, but also ensuring a stable, uniform and reliable welding effect for the wire tail ends of each temperature sensor;

[0020] 3. By setting the baffle, after taking out the temperature sensor from the tin pot, it can automatically drive the baffle to cover the opening of the tin pot, optimizing the use environment of the tin liquid by reducing oxidation, maintaining temperature stability, avoiding impurity pollution, improving safety and reducing volatile emissions, and ensuring the quality and safety of the tinning process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the overall structural schematic diagram of a tinning device for the wire tail end of a temperature sensor of the present invention;

[0022] Figure 2Partial sectional view of the overall structure of a tinning device for the end of a temperature sensor wire according to the present invention;

[0023] Figure 3 Partial sectional view of the partial structure of a tinning device for the end of a temperature sensor wire according to the present invention;

[0024] Figure 4 Expanded view of the cover structure of a tinning device for the end of a temperature sensor wire according to the present invention;

[0025] Figure 5 Schematic diagram of the base and other structures of a tinning device for the end of a temperature sensor wire according to the present invention;

[0026] Figure 6 Partial sectional view of the fixing sleeve and other structures of a tinning device for the end of a temperature sensor wire according to the present invention;

[0027] Figure 7 Partial sectional view of the fixing seat and other structures of a tinning device for the end of a temperature sensor wire according to the present invention;

[0028] Figure 8 Schematic diagram of the transmission mechanism structure of a tinning device for the end of a temperature sensor wire according to the present invention.

[0029] The labels in the figure are: 1. Base; 2. Tin pot; 3. Cover; 4. Moving frame; 5. Rotating frame; 6. Fixing seat; 7. Fixing sleeve; 8. Temperature sensor; 9. Contact head; 10. Transmission mechanism; 11. Pressing plug; 301. Rotating shaft; 302. Driven wheel; 303. Driving wheel; 304. Universal joint A; 305. Transmission rod; 306. Feeding port; 307. Sealing plug; 401. Electric push rod; 501. Transmission sleeve; 502. Deflection groove; 101. Fixed rod; 102. Guide head; 601. Hydraulic rod; 701. Clamping strip; 702. Spring; 901. Contact frame; 902. Tension spring; 1001. Universal joint B; 1002. Driving wheel; 1003. Transmission wheel; 1004. Adjusting wheel; 1005. Rotating rod; 1006. Poking rod; 1101. Transmission rack. Detailed implementation manners

[0030] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations.

[0031] As Figures 1-8A tinning device for the end of a temperature sensor wire shown in the figure, comprising a base 1, a tin pot 2 fixedly connected to the base 1, a cover 3 rotatably connected to one side of the base 1, a moving frame 4 provided on one side of the base 1, a rotating frame 5 rotatably connected to the moving frame 4, a fixed seat 6 fixedly connected to the other end of the rotating frame 5, a fixed sleeve 7 fixedly connected to the lower surface of the fixed seat 6, a temperature sensor 8 clamped in the fixed sleeve 7, a contact head 9 slidably fitted in the fixed sleeve 7, a transmission mechanism 10 rotatably connected to the fixed seat 6, and a pressure plug 11 slidably fitted on the outer wall of the fixed sleeve 7.

[0032] As Figure 4 shown, the lower surface of the cover 3 is in sliding contact with the top opening of the tin pot 2. One end of the cover 3 is fixedly connected with a rotating shaft 301, the bottom end of the rotating shaft 301 is rotatably connected to the base 1, a driven wheel 302 is fixedly connected to the bottom end of the rotating shaft 301, a driving wheel 303 is meshed and driven on one side of the driven wheel 302, a universal joint A304 is fixedly connected to the driving wheel 303, the universal joint A304 is rotatably connected to the base 1, a transmission rod 305 is fixedly connected to the other end of the universal joint A304, a feeding port 306 is formed on the cover 3, and a sealing plug 307 is movably inserted into the feeding port 306. When the rotating frame 5 rotates, it will drive the universal joint A304 connected to the transmission rod 305 to rotate through the transmission sleeve 501, so that the universal joint A304 drives the connected driving wheel 303 to rotate, so that the driving wheel 303 drives the rotating shaft 301 connected to the driven wheel 302 to rotate, so that the rotating shaft 301 drives the connected cover 3 to rotate and open. By removing the sealing plug 307, tin liquid can be added into the tin pot 2 through the feeding port 306.

[0033] As Figure 5 shown, one end of the moving frame 4 is fixedly connected with an electric push rod 401, and the other end of the electric push rod 401 is fixedly connected to the base 1. The electric push rod 401 drives the moving frame 4 to move downwards. At this time, the spiral part of the deflection groove 502 will slide with the guiding head 102, and at this time, it will drive the rotating frame 5 connected to the transmission sleeve 501 to rotate.

[0034] As Figure 5 shown, a transmission sleeve 501 is fixedly connected to the end of the rotating frame 5 connected to the moving frame 4. The inner wall of the transmission sleeve 501 is slidably fitted with the outer wall of the transmission rod 305. A deflection groove 502 is formed on the outer wall of the transmission sleeve 501. The deflection groove 502 is composed of a straight line and a spiral part. A fixed rod 101 is fixedly connected to the base 1, a guiding head 102 is fixedly connected to the top end of the fixed rod 101, and the guiding head 102 is slidably fitted with the inner wall of the deflection groove 502.

[0035] As Figure 7As shown, the fixed seat 6 is slidably fitted to the top opening of the tin pot 2. A hydraulic rod 601 is fixedly connected to the fixed seat 6. The output end of the hydraulic rod 601 passes through the upper surface of the fixed seat 6 and extends downward to be fixedly connected to the pressure plug 11. When the moving frame 4 continues to move downward, the wire end of the temperature sensor 8 will be inserted into the tin liquid. At this time, the fixed seat 6 will cover the opening of the tin pot 2, and then the hydraulic rod 601 is used to drive the pressure plug 11 to move downward, so that the pressure plug 11 pressurizes the inside of the tin pot 2.

[0036] As Figure 6 shown, a plurality of clamping strips 701 are slidably fitted to the inner wall of the fixed sleeve 7 in an annular structure. The outer ends of the clamping strips 701 are in movable contact with the temperature sensor 8. The inner ends of the clamping strips 701 are fixedly connected with two springs 702, and the other ends of the springs 702 are fixedly connected to the inner wall of the fixed sleeve 7. The upper and lower ends of the clamping strips 701 are provided with inclined surfaces. The temperature sensor 8 is inserted into the fixed sleeve 7. At this time, under the action of the spring 702, the clamping strips 701 will clamp and fix the temperature sensor 8.

[0037] As Figure 6 shown, the bottom end of the contact head 9 is in movable contact with the temperature sensor 8. The top end of the contact head 9 is fixedly connected with a contact frame 901. The contact frame 901 is slidably fitted to the inner wall of the fixed sleeve 7. One side of the contact frame 901 is fixedly connected with a tension spring 902, and the other end of the tension spring 902 is fixedly connected to the inner wall of the fixed sleeve 7.

[0038] As Figure 8 shown, the transmission mechanism 10 includes a universal joint B1001. The universal joint B1001 is rotatably connected to the fixed seat 6. One end of the universal joint B1001 is fixedly connected with a driving wheel 1002. The other end of the universal joint B1001 extends into the fixed seat 6 and is fixedly connected with a transmission wheel 1003. One side of the transmission wheel 1003 is meshed and transmitted with an adjusting wheel 1004. One end of the adjusting wheel 1004 is fixedly connected with a rotating rod 1005. One end of the rotating rod 1005 is rotatably connected to the inner wall of the fixed seat 6. The other end of the rotating rod 1005 extends into the fixed sleeve 7 and is fixedly connected with a shifting rod 1006. The shifting rod 1006 is in movable contact with the contact frame 901. The pressure plug 11 will drive the transmission rack 1101 to move, so that the transmission rack 1101 can drive the driving wheel 1002 to rotate, so that the driving wheel 1002 drives the transmission wheel 1003 connected by the universal joint B1001 to rotate, so that the transmission wheel 1003 drives the adjusting wheel 1004 to rotate, so that the adjusting wheel 1004 drives the shifting rod 1006 connected by the rotating rod 1005 to rotate. Then the shifting rod 1006 will contact and drive the contact frame 901 to move. Then when the shifting rod 1006 is disengaged from the contact frame 901, under the action of the tension spring 902, it will drive the contact frame 901 to impact on the temperature sensor 8.

[0039] As shown Figure 7 As shown, the outer circumference of the pressure plug 11 is slidably fitted with the inner wall of the tin pot 2. A transmission rack 1101 is fixedly connected to the upper surface of the pressure plug 11, and the transmission rack 1101 is meshed and driven with the driving wheel 1002.

[0040] By setting the pressure plug 11, after inserting the tail end of the wire of the temperature sensor 8 into the tin liquid, the pressure plug 11 is used to move in the tin pot 2 to pressurize the tin pot 2, enabling the tin liquid to quickly and evenly penetrate into the multi-strand wire structure at the tail end of the wire of the temperature sensor 8, improving the efficiency and quality of tinning. The pressure plug 11 not only shortens the tinning time, reduces the risks of cold soldering and false soldering, but also ensures more complete coverage of the tin liquid, reduces oxidation pollution, and improves the consistency of welding quality, thereby improving the performance and reliability of the temperature sensor 8.

[0041] Working principle: When tinning the tail end of the wire of the temperature sensor 8, first insert the temperature sensor 8 to be tinned into the fixed sleeve 7. At this time, under the action of the spring 702, the clamping strip 701 will clamp and fix the temperature sensor 8;

[0042] Then use the electric push rod 401 to drive the moving frame 4 to move downward. At this time, the spiral part of the deflection groove 502 will slide with the guide head 102, and at this time, it will drive the rotating frame 5 connected to the transmission sleeve 501 to rotate, so that the temperature sensor 8 rotates to directly above the tin pot 2;

[0043] When the rotating frame 5 rotates, it will drive the universal joint A304 connected to the transmission rod 305 to rotate through the transmission sleeve 501, so that the universal joint A304 drives the driving wheel 303 connected to it to rotate, so that the driving wheel 303 drives the rotating shaft 301 connected to the driven wheel 302 to rotate, so that the rotating shaft 301 drives the connected baffle 3 to rotate and open. By removing the sealing plug 307, tin liquid can be added to the tin pot 2 through the liquid adding port 306. The baffle 3 can prevent the tin liquid from splashing during liquid addition, ensuring safety;

[0044] Then when the moving frame 4 continues to move downward, the wire end of the temperature sensor 8 will be inserted into the tin liquid. At this time, the fixed seat 6 will cover the opening of the tin pot 2, and then use the hydraulic rod 601 to drive the pressure plug 11 to move downward, so that the pressure plug 11 pressurizes the tin pot 2;

[0045] At this time, the pressure plug 11 will drive the transmission rack 1101 to move, so that the transmission rack 1101 can drive the driving wheel 1002 to rotate, so that the driving wheel 1002 drives the transmission wheel 1003 connected by the universal joint B1001 to rotate, so that the transmission wheel 1003 drives the adjusting wheel 1004 to rotate, so that the adjusting wheel 1004 drives the lever 1006 connected by the rotating rod 1005 to rotate. Then, the lever 1006 will contact and drive the contact frame 901 to move. Then, when the lever 1006 is disengaged from the contact frame 901, the contact frame 901 will be driven by the tension spring 902 to impact on the temperature sensor 8, causing it to vibrate slightly, so that the tin liquid can fully and quickly penetrate into the end of the wire for tinning.

[0046] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A tinning device for the tail end of a temperature sensor wire, comprising a base (1), characterized in that: A tin pot (2) is fixedly connected to the base (1), a blocking cover (3) is rotatably connected to one side of the base (1), a movable frame (4) is provided on one side of the base (1), a rotating frame (5) is rotatably connected to the movable frame (4), a fixed seat (6) is fixedly connected to the other end of the rotating frame (5), a fixed sleeve (7) is fixedly connected to the lower surface of the fixed seat (6), a temperature sensor (8) is clamped in the fixed sleeve (7), a contact head (9) is slidably provided in the fixed sleeve (7), a transmission mechanism (10) is rotatably connected to the fixed seat (6), and a pressurizing plug (11) is slidably provided on the outer wall of the fixed sleeve (7).

2. The tinning device for the end of the temperature sensor wire according to claim 1, characterized in that: The lower surface of the blocking cover (3) is arranged in sliding contact with the top opening of the tin pot (2); a rotating shaft (301) is fixedly connected to one end of the blocking cover (3); the bottom end of the rotating shaft (301) is rotatably connected to the base (1); a driven wheel (302) is fixedly connected to the bottom end of the rotating shaft (301); a driving wheel (303) is meshingly driven on one side of the driven wheel (302); a universal joint A (304) is fixedly connected to the driving wheel (303); the universal joint A (304) is rotatably connected to the base (1); a transmission rod (305) is fixedly connected to the other end of the universal joint A (304); a feeding port (306) is provided on the blocking cover (3); a sealing plug (307) is movably inserted into the feeding port (306).

3. A tinned device for the wire end of a temperature sensor according to claim 1, wherein: One end of the movable frame (4) is fixedly connected to an electric push rod (401), and the other end of the electric push rod (401) is fixedly connected to the base (1).

4. A tinned device for the wire end of a temperature sensor according to claim 2, characterized in that: A transmission sleeve (501) is fixedly connected to one end of the rotating frame (5) connected to the moving frame (4); the inner wall of the transmission sleeve (501) is slidably matched with the outer wall of the transmission rod (305); a direction-changing groove (502) is provided on the outer wall of the transmission sleeve (501); the direction-changing groove (502) is composed of a straight line and a spiral; a fixed rod (101) is fixedly connected to the base (1); a guide head (102) is fixedly connected to the top of the fixed rod (101); the guide head (102) is slidably matched with the inner wall of the direction-changing groove (502).

5. A tinning device for the wire end of a temperature sensor according to claim 1, characterized in that: The fixing seat (6) is slidably matched with the top opening of the tin pot (2), and a hydraulic rod (601) is fixedly connected to the fixing seat (6). The output end of the hydraulic rod (601) passes through the upper surface of the fixing seat (6) and extends downward and is fixedly connected to the pressure plug (11).

6. The tinned device for the wire end of a temperature sensor according to claim 1, characterized in that: The inner wall of the fixing sleeve (7) is annular in structure and is slidably fitted with a plurality of clamping strips (701); the outer ends of the clamping strips (701) are in active contact with the temperature sensor (8); the inner ends of the clamping strips (701) are fixedly connected with two springs (702); the other ends of the springs (702) are fixedly connected with the inner wall of the fixing sleeve (7); and the clamping strips (701) are provided with inclined surfaces at both upper and lower ends.

7. A tinned device for the wire end of a temperature sensor according to claim 1, characterized in that: The bottom end of the contact head (9) is movably connected to the temperature sensor (8), the top end of the contact head (9) is fixedly connected to a contact frame (901), the contact frame (901) is slidably matched with the inner wall of the fixed sleeve (7), one side of the contact frame (901) is fixedly connected to a tension spring (902), and the other end of the tension spring (902) is fixedly connected to the inner wall of the fixed sleeve (7).

8. A tinned device for the wire end of a temperature sensor according to claim 7, characterized in that: The transmission mechanism (10) comprises a universal joint B (1001), wherein the universal joint B (1001) is rotatably connected to a fixed seat (6), one end of the universal joint B (1001) is fixedly connected to a driving wheel (1002), the other end of the universal joint B (1001) extends into the fixed seat (6) and is fixedly connected to a transmission wheel (1003), one side of the transmission wheel (1003) is meshed with an adjustment wheel (1004), one end of the adjustment wheel (1004) is fixedly connected to a rotating rod (1005), one end of the rotating rod (1005) is rotatably connected to an inner wall of the fixed seat (6), the other end of the rotating rod (1005) extends into the fixed sleeve (7) and is fixedly connected to a shifting rod (1006), and the shifting rod (1006) is movably contacted with the contact frame (901).

9. The tinned device for the end of the temperature sensor wire according to claim 8, characterized in that: The outer circumference of the pressure plug (11) is slidably matched with the inner wall of the tin pot (2), and a transmission rack (1101) is fixedly connected to the upper surface of the pressure plug (11), and the transmission rack (1101) is meshed with the driving wheel (1002) for transmission.

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