A curing barn sensor mounting structure convenient to disassemble and clean

Abstract

The utility model provides a kind of to be easily disassembled and cleaned curing barn sensor mounting structure, belong to sensor mounting structure technical field, this to be easily disassembled and cleaned curing barn sensor mounting structure includes: fixed base, fixed base is embedded in curing barn wall, with the end face towards curing barn interior;Movable shield, movable shield integration sensor body and protective cover;The end face of fixed base is provided at least a pair of about center symmetrical distribution L type guide slot, and L type guide slot is composed of longitudinal sliding slot by extending along axial direction and the radial lock slot vertical communication with longitudinal sliding slot end;The outer peripheral wall of movable shield is provided with the guide slider equal in number, shape complementary with L type guide slot, and the guide slider is rectangular projection;The center area of fixed base is provided with waterproof electric connector;Solved the existing bolt and rubber plug fixed mode lead to sensor dismounting cumbersome and probe and cable frequent damage, cannot realize barehanded quick power-off, disassembly and cleaning problem.

Description

Technical Field

[0001] This utility model belongs to the field of sensor installation structure technology, specifically, it relates to a sensor installation structure for a drying oven that is easy to disassemble and clean. Background Technology

[0002] The tobacco curing barn is the core enclosed space in the tobacco curing process. Its interior needs to maintain stable high temperature and humidity conditions for several weeks to promote chlorophyll degradation, aroma precursor conversion, and achieve ideal color and flexibility. Temperature, humidity, and moisture sensors, as the information source for the curing control system, must be located deep within the chamber to collect real-time microclimate data on airflow and leaf gaps. Therefore, the sensor mounting structure must not only be mechanically reliably fixed but also electrically continuous, thermally resistant to alternating temperature changes, and chemically resistant to the adhesion and corrosion of volatile oils, caramel, and chlorinated organic compounds emitted from the tobacco leaves.

[0003] Traditional approaches typically employ rigid fixing and rubber plug sealing: first, holes are drilled in the wall panel, a metal or ceramic base is bolted to the edge of the hole, then the sensor probe is screwed into the base and sealed using PTFE tape or silicone rings, and the signal cable passes through the center hole of the base and is pressed by the rubber plug. This structure provides sufficient rigidity and sealing initially; however, the repeated temperature fluctuations, high humidity penetration, and the combined effects of grease and dust during the oven's operation cause the rubber plug to gradually harden and crack, leading to seal failure. The bolt threads also stick together due to thermal expansion and contraction and grease penetration. Maintenance personnel must enter the confined, high-temperature space with wrenches, screwdrivers, and degreasers to disconnect the power, disconnect the wires, loosen the screws, remove the sensor, clean it, and then reassemble it in reverse. The entire process is time-consuming and lengthy. Repeated disassembly and reassembly of bolts cause stripped threads on the wall panels, and permanent gaps appear on the sealing surfaces due to prying deformation. This not only increases equipment downtime but also raises the probability of damage to sensor probes and wiring terminals. Furthermore, it can lead to moisture and heat leakage, heat loss, and control drift due to seal degradation, ultimately affecting the uniformity of the entire batch of tobacco and its commercial grade. The industry has tried to replace bolts with quick-connect couplings, but the ball grooves of quick-connect couplings are still easily clogged by grease, and they require two hands to operate, which is inconvenient when wearing heat-resistant gloves. Some have proposed magnetic solutions, but the wall panels of the curing barn are mostly made of non-magnetic stainless steel or aluminum skin, and embedding magnets not only increases thermal bridges but also faces the problem of magnetic force weakening as the temperature rises. Utility Model Content

[0004] In view of this, the present invention provides a sensor installation structure for a drying oven that is easy to disassemble and clean. In the drying oven environment where high temperature and humidity, grease and dust coexist, it solves the problems of cumbersome sensor disassembly and assembly caused by existing bolt and rubber plug fixing methods, frequent damage to probes and cables, and inability to achieve quick power-off, disassembly and cleaning by hand.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a sensor installation structure for a drying oven that is easy to disassemble and clean, comprising:

[0007] A fixed base, which is embedded in the wall of the drying oven and has an end face facing the inside of the drying oven;

[0008] Movable protective cover, which integrates the sensor body and the protective cover;

[0009] The end face of the fixed base is provided with at least a pair of L-shaped guide grooves that are symmetrically distributed about the center. The L-shaped guide groove is composed of a longitudinal sliding groove extending along the axial direction and a radial locking groove that is perpendicularly connected to the end of the longitudinal sliding groove.

[0010] The outer peripheral wall of the movable cover is provided with guide sliders that are equal in number and complementary in shape to the L-shaped guide grooves. The guide sliders are rectangular protrusions that can slide into the longitudinal grooves and can be rotated and locked in the radial locking grooves.

[0011] A waterproof electrical connector is provided in the central area of ​​the fixed base, and a socket complementary to the waterproof electrical connector is provided at the center of the rear of the movable cover.

[0012] When the guide slider is pushed to the bottom along the longitudinal groove, the movable cover rotates relative to the fixed base, causing the guide slider to rotate into the radial locking groove and be limited. At the same time, the waterproof electrical connector and the socket automatically plug in to complete the electrical connection, realizing the rapid mechanical locking and electrical conduction between the movable cover and the fixed base.

[0013] The technical advantages of the easy-to-disassemble and clean oven sensor installation structure provided by this utility model are as follows: By coupling the shape and position of the L-shaped guide groove and guide slider between the fixed base and the movable cover, and with the coaxial insertion of the central waterproof electrical connector and the socket, the mechanical locking and electrical conduction can be completed simultaneously by a "push and turn" manual action. The entire sensor can be pulled out for cleaning by rotating in the opposite direction, completely eliminating the need for tools, power off, and wire disconnection, and significantly reducing the maintenance difficulty and downtime of the sensor in high temperature and high humidity environments.

[0014] Based on the above technical solution, the easy-to-disassemble and clean oven sensor installation structure of this utility model can be further improved as follows:

[0015] The longitudinal groove of the L-shaped guide groove extends axially inward from the edge of the fixed base end face, and the radial locking groove extends circumferentially from the end of the longitudinal groove and forms a limiting protrusion at the end to prevent the guide slider from slipping out in the opposite direction.

[0016] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the continuous L-shaped trajectory formed by the longitudinal slide groove and the radial locking groove with the end limit protrusion provides axial guidance during the pushing stage and one-way blocking by the protrusion at the end of the rotation, preventing loosening caused by vibration or thermal expansion and contraction, so that the locking state can remain reliably stable during the long-term operation of the drying room.

[0017] Furthermore, the outer surface of the guide slider slides into contact with the groove wall of the L-shaped guide groove, and the cross-sectional shapes of the two are complementary rectangular contours to limit the radial sway of the movable cover relative to the fixed base.

[0018] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the guide slider with rectangular cross section slides and fits against the L-shaped guide groove wall throughout the entire process, and the radial gap is eliminated by the shape itself. The movable cover will not wobble or be eccentric during the entire process of insertion, rotation and locking, which ensures the accuracy of the alignment of the male and female heads of the waterproof electrical connector and avoids contact wear caused by misalignment of the pins.

[0019] Furthermore, the waterproof electrical connector is a multi-pin connector with a circular metal shell, the male part of which protrudes from the end face of the fixed base, and the socket is a female part embedded in the center of the rear of the movable cover. The pin hole inside the socket is soldered to the lead wire of the sensor body to form a closed electrical circuit.

[0020] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the circular metal shell multi-pin connector protrudes from the center of the fixed base, and the socket is embedded in the center of the rear of the movable cover. The insertion direction of the two coincides with the rotation axis, so that the mechanical locking and electrical connection are completed sequentially on the same degree of freedom. The connector shell itself becomes an additional positioning reference, which further improves the reliability of docking and simplifies the wiring sealing structure.

[0021] Furthermore, the insertion direction of the waterproof electrical connector and the socket is coaxial with the rotation axis of the movable cover, so that the male and female heads automatically align and complete insertion during the rotation locking process without the need for additional alignment operations.

[0022] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the coaxial arrangement of the connector and socket allows the rotational motion to naturally generate axial insertion stroke, and the operator can achieve automatic mating at the end of the rotation without additional alignment, eliminating human alignment error, reducing the maintenance intensity of individual soldiers, and avoiding pin bending failure caused by blind mating.

[0023] Furthermore, a heat insulation sleeve is fitted around the outer periphery of the fixed base, and the outer end face of the heat insulation sleeve is in contact with the inner surface of the oven wall to block the thermal bridge between the fixed base and the oven wall and improve the sealing performance.

[0024] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the heat insulation sleeve forms a broken bridge between the fixed base and the oven wall, blocking the heat leakage channel from the metal base to the outside, which reduces heat loss and lowers the temperature rise of the base surface, so that the external electrical interface is at a lower operating temperature, extends the life of the sealing material and improves operational safety.

[0025] Furthermore, an elastic sealing ring is provided between the fixed base and the oven wall. The elastic sealing ring is clamped between the annular groove on the outer periphery of the fixed base and the oven wall to prevent hot and humid air from leaking along the outer periphery of the base.

[0026] The beneficial effects of adopting the above-mentioned improved scheme are as follows: after the elastic sealing ring is clamped by the ring groove and the wall of the drying oven, it generates continuous radial compression, forming a circumferential closed barrier on the outer periphery of the base. Even if the pressure of the hot and humid air inside the drying oven fluctuates, it can prevent it from penetrating along the gaps in the wall holes, maintain the accuracy of temperature and humidity control in the drying oven and protect the external electrical control devices.

[0027] Furthermore, the movable protective cover is a circumferentially closed metal or high-temperature resistant plastic shell with an end face opening. The probe of the sensor body extends out from the opening and faces the inside of the baking oven. An annular gap is left between the inner wall of the protective cover and the sensor body to form a space for heat dissipation and grease adhesion prevention.

[0028] The materials are: metal is 6061-T6 aluminum alloy with anodized or Teflon-coated surface, and high-temperature resistant plastic is glass fiber reinforced PPS (polyphenylene sulfide) or PEEK (polyether ether ketone). Both have a continuous operating temperature of ≥180℃ and are inert to volatile oils from tobacco leaves and acid and alkali cleaning agents. They can directly contact the internal environment of the curing barn without releasing volatiles or deforming, thus taking into account lightweight, corrosion resistance and long-term thermal stability.

[0029] Furthermore, the diameter of the opening on the end face of the protective cover is smaller than the outer diameter of the sensor probe, so that the probe is confined within the opening. At the same time, an annular baffle is formed on the outer side of the end face of the protective cover to prevent dripping grease from directly contacting the probe surface.

[0030] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the annular baffle formed by the reduced diameter of the opening on the end face of the protective cover constitutes a physical barrier around the probe, which can intercept dripping grease from directly contaminating the probe and further extend the effective working time of the probe; at the same time, the narrow channel between the baffle and the probe still allows airflow to pass through, taking into account both the measurement response speed and the requirements for anti-contamination.

[0031] Furthermore, the connection and locking of the fixed base and the movable cover are achieved solely through the shape matching and relative rotation of the L-shaped guide groove and the guide slider.

[0032] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the entire locking system relies solely on the shape coupling of the L-shaped groove and the rectangular slider and manual rotation, completely eliminating threaded parts and tools, simplifying the disassembly and assembly steps to two steps: "push in - tighten clockwise" and "rotate counterclockwise - pull out". This can be completed quickly even in high-temperature environments where heat-resistant gloves are worn, significantly reducing maintenance time and the risk of parts loss.

[0033] Compared with existing technologies, the advantages of this invention's easy-to-disassemble and clean oven sensor installation structure are as follows: This invention introduces a purely mechanical L-shaped guide groove-slider coupling pair between the fixed base and the movable cover. Utilizing an ergonomic single-handed action of "axial insertion—circumferential rotation," it simultaneously completes the mechanical locking and automatic engagement of the male and female electrical connectors, thus simplifying the traditional "four-step process of power disconnection, wire removal, screw loosening, probe removal, cleaning, and reassembly" into a continuous operation of "one push and one turn." Since the locking force comes from the shape interference between the slider and the radial locking groove sidewall, rather than thread friction or rubber plug compression, even under long-term thermal cycling and mechanical vibration, there will be no loosening, stripping, or permanent deformation of the sealing ring. When rotating in the reverse direction, the slider exits along its original trajectory, the connector separates accordingly, and the entire sensor along with the protective cover can be pulled out as a whole. Operators can then wash or soak the protective cover in solvent in a clean area outside the oven. The probe itself is shielded by the cover, significantly reducing adhering substances and further shortening the cleaning time. The L-shaped groove and the rectangular slider form a zero-clearance fit in the radial direction, ensuring that the movable cover remains coaxially positioned throughout insertion, rotation, and locking. This protects the electrical connector pins from lateral shearing, significantly extending their lifespan. Simultaneously, this shape pair offers high manufacturing tolerances, allowing for molding via ordinary CNC milling or injection molding without the need for precision grinding, thus reducing mass production costs. The heat insulation sleeve and elastic sealing ring on the outer periphery of the fixed base form a double heat-moisture barrier. The heat insulation sleeve blocks the thermal bridge between the metal base and the wall panel, reducing heat loss and surface condensation. The elastic sealing ring continuously compresses radially, adaptively compensating for wall panel unevenness, maintaining airtightness even during pressure fluctuations inside the drying oven. This prevents humid and hot air from escaping through the wall holes, reducing energy consumption and preventing condensation and short circuits in the external electrical control box. The protective cover is made of aluminum alloy or glass fiber reinforced PPS / PEEK material with a continuous operating temperature of over 180 degrees Celsius. It has high surface inertness and will not swell or stress crack due to volatile oils, organic acids, or alkaline cleaning agents from tobacco leaves. It can be directly high-pressure washed or ultrasonically cleaned, eliminating the need to disassemble and reassemble the probe. The annular baffle formed by the reduced diameter at the end of the cover creates a physical barrier around the probe, which can intercept dripping oil, further reducing the probe contamination rate and improving data stability. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 An example diagram of a sensor mounting structure for a drying oven that is easy to disassemble and clean;

[0036] Figure 2 An example diagram of a non-movable protective cover for a drying oven sensor mounting structure that is easy to disassemble and clean;

[0037] Figure 3 A cross-sectional view of a sensor mounting structure for a drying oven that is easy to disassemble and clean;

[0038] The attached diagram lists the components represented by each number as follows:

[0039] 10. Fixed base; 11. Waterproof electrical connector; 20. Movable cover; 21. Guide slider; 30. L-shaped guide groove; 31. Longitudinal slide groove; 32. Radial locking groove. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0041] like Figures 1-3 The diagram shown is an example of a drying oven sensor installation structure that is easy to disassemble and clean, as provided by this utility model, including:

[0042] The fixed base 10 is embedded in the wall of the drying room and has an end face facing the inside of the drying room.

[0043] Movable cover 20, which integrates the sensor body and the protective cover;

[0044] The end face of the fixed base 10 is provided with at least a pair of L-shaped guide grooves 30 that are symmetrically distributed about the center. The L-shaped guide groove 30 is composed of a longitudinal sliding groove 31 extending along the axial direction and a radial locking groove 32 that is perpendicularly connected to the end of the longitudinal sliding groove 31.

[0045] The outer peripheral wall of the movable cover 20 is provided with guide sliders 21 in the same number and complementary shape as the L-shaped guide grooves 30. The guide sliders 21 are rectangular protrusions that can slide into the longitudinal groove 31 and can be rotated and locked in the radial locking groove 32.

[0046] A waterproof electrical connector 11 is provided in the central area of ​​the fixed base 10, and a socket complementary to the waterproof electrical connector 11 is provided at the center of the rear of the movable cover 20.

[0047] When the guide slider 21 is pushed to the bottom along the longitudinal groove 31, the movable cover 20 rotates relative to the fixed base 10, causing the guide slider 21 to rotate into the radial locking groove 32 and be limited. At the same time, the waterproof electrical connector 11 automatically plugs into the socket to complete the electrical connection, realizing the rapid mechanical locking and electrical conduction between the movable cover 20 and the fixed base 10.

[0048] In the above technical solution, the longitudinal sliding groove 31 of the L-shaped guide groove 30 extends axially inward from the edge of the end face of the fixed base 10, and the radial locking groove 32 extends circumferentially from the end of the longitudinal sliding groove 31 and forms a limiting protrusion at the end to prevent the guide slider 21 from slipping off in the opposite direction.

[0049] Furthermore, in the above technical solution, the outer surface of the guide slider 21 slides and fits against the groove wall of the L-shaped guide groove 30, and the cross-sectional shapes of the two are complementary rectangular contours, so as to limit the radial sway of the movable cover 20 relative to the fixed base 10.

[0050] Furthermore, in the above technical solution, the waterproof electrical connector 11 is a multi-pin connector with a circular metal shell, the male part of which protrudes from the end face of the fixed base 10, and the socket is a female part embedded in the center of the tail of the movable cover 20. The pin hole inside the socket is soldered to the lead wire of the sensor body to form a closed electrical circuit.

[0051] Furthermore, in the above technical solution, the insertion direction of the waterproof electrical connector 11 and the socket is coaxial with the rotation axis of the movable cover 20, so that the male and female heads automatically align and complete the insertion during the rotation locking process, without the need for additional alignment operations.

[0052] Furthermore, in the above technical solution, a heat insulation sleeve is fitted around the outer periphery of the fixed base 10, and the outer end face of the heat insulation sleeve is in contact with the inner surface of the oven wall to block the thermal bridge between the fixed base 10 and the oven wall and improve the sealing performance.

[0053] Furthermore, in the above technical solution, an elastic sealing ring is provided between the fixed base 10 and the oven wall. The elastic sealing ring is clamped between the annular groove on the outer periphery of the fixed base 10 and the oven wall to prevent hot and humid air from leaking along the outer periphery of the base.

[0054] Furthermore, in the above technical solution, the protective cover of the movable cover 20 is a metal or high-temperature resistant plastic shell that is circumferentially closed and has openings on the end face. The probe of the sensor body extends out from the opening and faces the inside of the baking oven. An annular gap is left between the inner wall of the protective cover and the sensor body to form a space for heat dissipation and grease adhesion prevention.

[0055] Furthermore, in the above technical solution, the diameter of the opening on the end face of the protective cover is smaller than the outer diameter of the sensor probe, so that the probe is confined within the opening. At the same time, an annular baffle is formed on the outer side of the end face of the protective cover to prevent dripping grease from directly contacting the probe surface.

[0056] Furthermore, in the above technical solution, the connection and locking of the fixed base 10 and the movable cover 20 are achieved only through the shape matching and relative rotation of the L-shaped guide groove 30 and the guide slider 21.

[0057] Example 1: The fixed base described in this utility model is embedded in the wall of an airflow-driven dense drying oven on the Guizhou Plateau. The base is surrounded by a microporous ceramic heat insulation sleeve, and a pair of centrally symmetrical L-shaped guide grooves are formed on the end face. The grooves are formed by the continuous intersection of an axial sliding groove and a circumferential locking groove. A circular metal shell multi-pin waterproof electrical connector is press-fitted into the central area, with the male connector slightly higher than the end face. The movable cover is made of 6061-T6 aluminum alloy, machined by turning. Two rectangular guide sliders are cast on the outer wall, and a socket complementary to the male connector is embedded in the center of the tail. The cover is circumferentially closed, with a Φ20mm circular hole at the front end through which the sensor probe extends. A 2mm high annular retaining edge is integrally formed along the edge of the hole.

[0058] The application scenario is as follows: a quick cleaning is required once during the middle stage of each batch of tobacco leaves. The operator, wearing heat-resistant gloves, pushes the movable cover slider into the longitudinal groove with one hand, rotating it clockwise by approximately 25°. The slider is stopped by the protrusion at the end of the locking groove, and the connector engages simultaneously, completing the mechanical and electrical processes concurrently. The entire disassembly and assembly process takes 18 seconds under conditions of 80°C and 85% relative humidity inside the curing barn, requiring no tools and no cable interruptions. For cleaning, the entire cover is moved outdoors and scrubbed with 60°C alkaline water. Grease is removed along with the edges, leaving only a small amount of surface dust on the probe surface. After rinsing, it can be reassembled for continued curing. This embodiment is suitable for medium to large-sized, densely packed curing barns with limited space for bolt disassembly and assembly, requiring frequent cleaning. It ensures data continuity while avoiding the risk of wall panel failure due to stripped bolt threads.

[0059] Example 2: In a split-type heat pump oven experimental line in Wenshan Prefecture, Yunnan Province, another combination of this utility model was adopted: the fixed base is fixed to the detachable inner lining plate by laser welding, and the outer periphery of the base is covered with a glass fiber reinforced PPS heat insulation sleeve, with a pair of L-shaped guide grooves still provided on the end face; the movable protective cover material is changed to natural-colored PEEK, suitable for use in experimental baking with added food flavorings. The guide slider is integrally injection molded with the cover body, and the rear socket is coaxially embedded; the diameter of the opening at the front end of the cover body is reduced to Φ16mm, and the height of the baffle is increased to 3mm to cope with the higher probability of dripping after the flavoring condenses.

[0060] The application scenario is for small-batch, multi-formulation operations requiring thorough cleaning after each formulation. To avoid cross-contamination during formulation changes, operators must replace the sensor while it remains at a residual temperature of 50°C. The operation is still "push-in-rotate," but due to the self-lubricating surface of PPS / PEEK, the rotational torque is reduced by 30% compared to the metal embodiment, allowing for easy one-handed operation. After removal, the entire cover is placed directly into a 75°C ultrasonic cleaning bath, where fragrance residue is removed in 5 minutes, leaving the probe virtually free of residue. This embodiment meets the high-frequency replacement requirements of research lines with multiple drying cycles per day, and the non-metallic material prevents catalytic reactions between fragrance and metal ions, ensuring the purity of experimental data. It is particularly suitable for fragrance and flavor drying rooms or organic herb drying lines where higher chemical inertness is required.

[0061] Specifically, the principle of this invention is as follows: Based on the two principles of shape-position coupling and motion-function reuse, this invention integrates the three functions that traditionally need to be performed separately—mechanical fixing, electrical conduction, and sealing isolation—into a single rotational degree of freedom. The L-shaped guide groove on the end face of the fixed base is formed by the continuous intersection of a longitudinal sliding groove and a radial locking groove. The longitudinal sliding groove provides an axial insertion channel, while the radial locking groove utilizes the lateral obstruction of the rectangular slider by its sidewall to form a self-locking mechanism. When the movable cover is pushed to the bottom, the slider is precisely located at the longitudinal-radial intersection point. At this point, clockwise rotation causes the slider to slide along the radial locking groove and be unidirectionally stopped by the end-limiting protrusion. The rotational motion is converted into a shape-locking force perpendicular to the insertion / removal direction, thus constraining the movable cover in both the axial and radial directions, achieving a fastening effect equivalent to bolt pre-tightening. Since the direction of the locking force is perpendicular to the vibration direction, according to the friction self-locking theory, even under continuous excitation by the drying oven fan, the slider will not slip off on its own, achieving threadless anti-loosening. The same rotational motion also drives the male connector of the waterproof electrical connector at the center of the fixed base to approach the female connector of the socket at the rear of the movable cover. The mating surfaces of the two are designed as circular surfaces coaxial with the rotation axis, and the pins and sockets have guide chamfers in the circumferential tangential direction. Therefore, during rotation, the male and female connectors automatically align and smoothly engage, completing the power and signal conduction. When rotating in the opposite direction, the connector first separates, cutting off the electrical connection. Then, the slider exits the radial locking groove and enters the longitudinal sliding groove, the mechanical constraint is released, and the movable cover can be pulled out as a whole, realizing the safe sequence of power off first and unlocking later. The heat insulation sleeve is made of engineering plastic or microporous ceramic with a thermal conductivity lower than that of stainless steel. The sleeve forms a thermal resistance layer between the base and the wall panel, cutting off the originally continuous metal thermal bridge, making the temperature of the outside of the wall panel close to the ambient temperature, reducing heat loss and preventing the external electrical control box from getting damp due to condensation on the wall surface. The elastic sealing ring uses material rebound to continuously apply sealing pressure in the radial direction. When the pressure inside the drying oven increases, the sealing ring is further compressed, adaptively enhancing the sealing effect, which conforms to the principle of pressure self-tightening sealing. The selection of protective cover materials prioritizes inertness and high temperature resistance. After anodizing, aluminum alloy forms a dense oxide film with a thermal expansion coefficient close to that of the base, preventing cracking during long-term thermal cycling. PPS and PEEK have glass transition temperatures much higher than the peak temperature of the curing oven, and their molecular chains contain benzene rings or ether bonds, making them chemically inert to oils and organic acids. They also have low surface energy, making it difficult for tobacco volatiles to wet and adhere, and allowing contaminants to be easily removed during rinsing.

Claims

1. A sensor mounting structure for a drying oven that is easy to disassemble and clean, characterized in that, include: A fixed base, which is embedded in the wall of the drying oven and has an end face facing the inside of the drying oven; Movable protective cover, which integrates the sensor body and the protective cover; The end face of the fixed base is provided with at least a pair of L-shaped guide grooves that are symmetrically distributed about the center. The L-shaped guide groove is composed of a longitudinal sliding groove extending along the axial direction and a radial locking groove that is perpendicularly connected to the end of the longitudinal sliding groove. The outer peripheral wall of the movable cover is provided with guide sliders that are equal in number and complementary in shape to the L-shaped guide grooves. The guide sliders are rectangular protrusions that can slide into the longitudinal grooves and can be rotated and locked in the radial locking grooves. A waterproof electrical connector is provided in the central area of ​​the fixed base, and a socket complementary to the waterproof electrical connector is provided at the center of the rear of the movable cover. When the guide slider is pushed to the bottom along the longitudinal groove, the movable cover rotates relative to the fixed base, causing the guide slider to rotate into the radial locking groove and be limited. At the same time, the waterproof electrical connector and the socket automatically plug in to complete the electrical connection, realizing the rapid mechanical locking and electrical conduction between the movable cover and the fixed base.

2. The easy-to-disassemble and clean oven sensor installation structure according to claim 1, characterized in that, The longitudinal groove of the L-shaped guide groove extends axially inward from the edge of the fixed base end face, and the radial locking groove extends circumferentially from the end of the longitudinal groove and forms a limiting protrusion at the end to prevent the guide slider from slipping out in the opposite direction.

3. The easy-to-disassemble and clean oven sensor installation structure according to claim 2, characterized in that, The outer surface of the guide slider slides against the wall of the L-shaped guide groove, and the cross-sectional shapes of the two are complementary rectangular contours to limit the radial sway of the movable cover relative to the fixed base.

4. The easy-to-disassemble and clean oven sensor installation structure according to claim 3, characterized in that, The waterproof electrical connector is a multi-pin connector with a circular metal shell. Its male head protrudes from the end face of the fixed base. The socket is a female head embedded in the center of the rear of the movable cover. The pin hole inside the socket is soldered to the lead wire of the sensor body to form a closed electrical circuit.

5. The easy-to-disassemble and clean oven sensor installation structure according to claim 4, characterized in that, The insertion direction of the waterproof electrical connector and the socket is coaxial with the rotation axis of the movable cover, so that the male and female heads automatically align and complete the insertion during the rotation locking process without the need for additional alignment operations.

6. The easy-to-disassemble and clean oven sensor mounting structure according to claim 5, characterized in that, A heat insulation sleeve is fitted around the outer periphery of the fixed base. The outer end face of the heat insulation sleeve is in contact with the inner surface of the oven wall to block the thermal bridge between the fixed base and the oven wall and improve the sealing performance.

7. The easy-to-disassemble and clean oven sensor installation structure according to claim 6, characterized in that, An elastic sealing ring is provided between the fixed base and the oven wall. The elastic sealing ring is clamped between the annular groove on the outer periphery of the fixed base and the oven wall to prevent hot and humid air from leaking along the outer periphery of the base.

8. The easy-to-disassemble and clean oven sensor installation structure according to claim 7, characterized in that, The movable protective cover is a circumferentially closed metal or high-temperature resistant plastic shell with an end face opening. The probe of the sensor body extends out from the opening and faces the inside of the oven. An annular gap is left between the inner wall of the protective cover and the sensor body to form a space for heat dissipation and grease adhesion prevention.

9. The easy-to-disassemble and clean oven sensor mounting structure according to claim 8, characterized in that, The diameter of the opening on the end face of the protective cover is smaller than the outer diameter of the sensor probe, so that the probe is confined within the opening. At the same time, an annular baffle is formed on the outer side of the end face of the protective cover to prevent dripping grease from directly contacting the probe surface.

10. The easy-to-disassemble and clean oven sensor mounting structure according to claim 9, characterized in that, The connection and locking of the fixed base and the movable cover are achieved solely through the shape matching and relative rotation of the L-shaped guide groove and the guide slider.

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