Electric heating air drying oven with convenient sample taking and placing
By incorporating guide rails, insert rods, and slots within the electric heating drying oven, along with limiting cables, torsion springs, and clamping blocks, the problems of tray suspension and uneven sliding are solved, thereby improving the safety and operational efficiency of sample handling.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANTOU TIANJIAN TESTING TECHNOLOGY SERVICE CO LTD
- Filing Date
- 2025-09-05
- Publication Date
- 2026-07-21
AI Technical Summary
Existing electric heating drying ovens often have trays that are suspended in the air or need to be completely pulled out when taking samples in or out, which causes inconvenience and safety hazards, especially when observing or taking samples from deep within the oven.
Guide rails and tray bottom mounting rods are installed on the inner wall of the drying oven. The insertion rods cooperate with the slots, and the rotation of the insertion rods is controlled by the limit cable and torsion spring. The guide wheels reduce friction, and the clamping blocks provide additional fixation, so as to achieve stable suspension and smooth sliding of the tray.
It improves the safety and efficiency of sample handling, reduces tray sliding friction, ensures accurate positioning of the tray in the designated location, simplifies the operation steps, and enhances the stability of the tray.
Smart Images
Figure CN224534647U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of drying oven technology, specifically, it relates to an electric heating forced-air drying oven that facilitates sample loading and unloading. Background Technology
[0002] Electric heating drying ovens are essential testing equipment in aerospace, automotive, home appliance, and scientific research fields. They are used to test and determine the parameters and performance of electrical, electronic, and other products and materials after undergoing high-temperature testing and temperature environment changes. They are suitable for various experiments in laboratories and testing facilities of research institutions, professional colleges, and industrial and mining enterprises, as well as for on-site production applications such as drying, curing, baking, wax melting, and sterilization.
[0003] Currently, electric heating forced-air drying ovens typically employ at least two trays to improve drying efficiency per cycle. These trays are usually pull-out type; the sample to be dried is placed on the tray, which is then pushed into the oven's guide rails. However, this design means that during the drying process, if the tray needs to be pulled out to observe the drying effect or to retrieve the dried sample again, it usually requires pulling the tray outwards, leaving part of the tray suspended in an unsafe state. Alternatively, if the sample needs to be observed or retrieved deep within the drying oven, the tray must be completely pulled out and placed on a table for operation. This structural design makes sample retrieval inconvenient. Therefore, a more convenient electric heating forced-air drying oven for sample retrieval is proposed. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an electric heating drying oven that can overcome or at least partially solve the above problems and facilitate sample handling.
[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows: an electric heating drying oven for convenient sample handling, wherein guide rails are symmetrically fixedly connected to the inner wall of the drying chamber of the drying oven, and a tray is placed on the guide rails; it also includes: mounting rods symmetrically fixedly connected to the bottom surface of the tray, a mounting cavity is opened on the bottom surface of one end of the mounting rod, and an insertion rod is rotatably connected in the mounting cavity. The insertion rod is connected to the top surface of the mounting cavity by a limiting cable to limit the rotation angle of the insertion rod; a slot is opened on the upper surface of the guide rail near the front end of the drying oven, and the insertion rod is pulled to move the tray close to the slot, with one end of the insertion rod entering the slot downward.
[0006] Furthermore, a guide wheel is rotatably connected to the bottom surface of the insertion rod.
[0007] Furthermore, two grooves are provided at the end of the guide rail away from the end face of the drying chamber, and the grooves correspond to the guide wheels.
[0008] Preferably, the insertion rod is rotatably connected to the mounting cavity via a torsion spring.
[0009] Preferably, a connecting rod is slidably arranged on the guide rail near the front end of the drying chamber, and a clamping block is rotatably connected to the connecting rod. A fixing ring is fixedly connected to the connecting rod on both sides of the clamping block. A buckle is fixedly connected to the inner wall on both sides of the drying chamber, and a pad is fixedly connected to the buckle. A buckle rod is fixedly connected to the connecting rod. Limiting plates are symmetrically fixedly connected to the guide rail, and the clamping block is located between the two limiting plates.
[0010] Furthermore, a handle is fixedly connected to the buckle.
[0011] Furthermore, a limiting block is fixedly connected to the inner wall of the drying chamber away from the end face of the drying box, and the limiting block is located above the end of the guide rail.
[0012] Furthermore, side baffles are provided on the opposite surfaces of the two symmetrical guide rails.
[0013] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:
[0014] 1. This electric heating drying oven, which facilitates sample handling, controls the maximum rotation angle of the insertion rod and matches the angle between the side wall of the slot and the upper surface of the guide rail. This ensures that the insertion rod is stably engaged in the slot. When the tray is pulled out, the insertion rod quickly embeds into the slot under its own weight or the action of the torsion spring, achieving "suspended" positioning of the tray. When it is necessary to pull out the tray to observe or handle samples, the operator can safely handle or observe samples without holding the tray or completely removing it, thereby improving operational efficiency and safety.
[0015] 2. This electric heating drying oven, which facilitates sample loading and unloading, features guide wheels on the bottom of the insertion rod that reduce friction with the guide rail, making the tray slide more smoothly, especially when moving the end of the tray. The groove at the end of the guide rail corresponds to the guide wheel. When the tray is pushed into the drying chamber, the guide wheel embeds into the groove, generating obvious dynamic feedback (a slight feeling of sticking). The operator can intuitively perceive whether the tray has been pushed to the designated position without repeated confirmation, improving operational efficiency and effectively preventing the tray from hitting the bottom wall of the drying chamber or the front end of the tray from protruding outside the drying chamber, which could cause it to collide with the door when closing.
[0016] 3. This electric heating drying oven, which facilitates sample loading and unloading, features a torsion spring that allows the insertion rod to respond and embed into the slot more quickly, solving the positioning delay problem when relying solely on its own weight. Meanwhile, the limiting block at the rear of the drying chamber can prevent the insertion rod from tilting upwards due to excessive torsion spring force when the tray is lightly loaded, thus preventing the end of the tray from lifting. This forms a complementary mechanism of "torsion spring accelerating positioning and limiting block preventing tilting," adapting to different load-bearing scenarios.
[0017] 4. This electric heating drying oven, which facilitates sample loading and unloading, allows for easy removal of the tray. When the tray needs to be removed, simply detach the lever from the buckle block, move the connecting rod upwards, and rotate it until the clamping block rests on the top surface of the limiting plate. This creates operating space between the clamping block and the edge of the tray, allowing the tray to be lifted for removal. The process is simple and requires no disassembly of parts, reducing operational complexity.
[0018] 5. This electric heating drying oven, which facilitates sample handling, improves the stability of the tray when it is in a "suspended" state by pressing down and fixing the tray with the clamping block. This enhances the fit with the tray, further strengthens the interlocking stability, and effectively prevents the rear end of the tray from tilting up and falling off.
[0019] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description
[0020] In the attached diagram:
[0021] Figure 1 This is a schematic diagram of the structure of an electric heating drying oven that facilitates sample handling, as proposed in this utility model.
[0022] Figure 2 This is a front view of an electric heating drying oven that facilitates sample handling, as proposed in this utility model.
[0023] Figure 3 This is a schematic diagram of the tray and limiting block of an electric heating drying oven that facilitates sample handling, as proposed in this utility model.
[0024] Figure 4 This is a schematic diagram of the guide rail and mounting rod of an electric heating drying oven that facilitates sample handling, as proposed in this utility model.
[0025] Figure 5 This is a schematic diagram of the slot and side wall structure of an electric heating drying oven for convenient sample loading and unloading proposed in this utility model.
[0026] Figure 6 This utility model proposes an electric heating drying oven that facilitates sample loading and unloading. Figure 5 Schematic diagram of the structure at point A;
[0027] Figure 7 A schematic diagram of the buckle and handle of an electric heating drying oven for convenient sample handling proposed in this utility model;
[0028] Figure 8 This is a schematic diagram of the insertion rod entering the slot;
[0029] Figure 9 This is a schematic diagram of the insertion rod and guide wheel of an electric heating drying oven that facilitates sample loading and unloading, as proposed in this utility model.
[0030] In the diagram: 1. Drying oven; 11. Drying chamber; 2. Guide rail; 21. Side baffle; 22. Slot; 221. Side wall;
[0031] 3. Tray; 30. Limiting block; 31. Mounting rod; 32. Mounting cavity; 33. Insert rod; 34. Limiting cable; 35. Guide wheel; 36. Groove;
[0032] 4. Connecting rod; 41. Buckle bar; 42. Grip bar; 43. Buckle block; 44. Pad block; 45. Pressing block; 46. Fixing ring; 47. Limiting plate. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.
[0034] Example: Refer to Figures 1-9 An electric heating drying oven for convenient sample handling is described. Guide rails 2 are symmetrically installed on the inner wall of the drying chamber 11 of the drying oven 1, using welding or bolting. The guide rails 2 are made of high-temperature resistant metal (such as 304 stainless steel) to ensure no deformation during long-term use. A tray 3 for carrying the sample is placed on the guide rails 2. The tray 3 is also made of high-temperature resistant metal sheet, and ventilation holes can be opened on its surface as needed to ensure efficient hot air circulation. A mounting rod 31 is welded and fixed symmetrically on the bottom surface of the tray 3. The mounting rod 31 is parallel to the edge of the tray 3, and a mounting cavity 32 is formed on the bottom surface of the end of the mounting rod 31 closest to the depth of the drying chamber 11. The mounting cavity 32 has a cuboid structure, and its length is greater than the length of the insertion rod 33. The insertion rod 33 is rotatably connected to the mounting cavity 32 via a pivot. Meanwhile, a limiting cable 34 is connected between the top surface of the mounting cavity 32 and the end of the insertion rod 33 near the rotating shaft. The limiting cable 34 is made of high-temperature resistant steel wire rope, and its length is set such that when the insertion rod 33 rotates downward, the maximum rotation angle is controlled between 20° and 25°. In this embodiment, 23° is preferred to avoid excessive rotation of the insertion rod 33, which would prevent it from engaging in the slot 22. (In one embodiment, the limiting cable 34 can restrict the angle of the insertion rod 33 by opening an arc-shaped limiting groove of 0°-20° or 0°-25° on the side wall of the mounting cavity 32. A protrusion is installed on the side wall of the insertion rod 33, and the protrusion extends into the arc-shaped limiting groove to limit the rotation angle of the insertion rod 33.) On the upper surface of the guide rail 2 near the front end of the drying chamber 1, a slot 22 matching the insertion rod 33 is opened. The angle between the side wall 221 of the slot 22 and the upper surface of the guide rail 2 is the same as the maximum rotation angle of the insertion rod 33.
[0035] In use, when it is necessary to pull out tray 3 to observe or place samples, pull tray 3 out of drying chamber 11. When the insertion rod 33 approaches the slot 22, the end of the insertion rod 33 away from the rotation point will enter the slot 22 under its own weight, so that the upper surface of the insertion rod 33 is in contact with the side wall 221 of the slot 22 (see reference). Figure 8 This allows the tray 3 to engage with the slot 22 of the guide rail 2 via the insert rod 33. At this point, the tray 3 can be positioned, limited, and fixed. When the tray 3 is released, it can also be stably "suspended" in the drying chamber 11. (It should be noted that the weight on the tray 3 should not be too heavy, otherwise the tray 3 will tip over. The suitable load-bearing weight on the tray 3 is in the range of 1.5-2kg. It is also necessary to avoid the samples on the tray 3 being concentrated close to the front end of the tray 3, which would cause instability of the center of gravity. Therefore, this device is suitable for use under reasonable operating conditions and should be avoided under extreme conditions, which would cause the insert rod 33 to fail to engage with the slot 22.)
[0036] In one embodiment, the insertion rod 33 is rotatably connected to the mounting cavity 32 by a torsion spring. Compared with the previous embodiment, the torsion spring allows the insertion rod 33 to enter the slot 22 more quickly.
[0037] In one embodiment, a guide wheel 35 is rotatably connected to the bottom surface of the insertion rod 33. The guide wheel 35 reduces friction between the insertion rod 33 and the guide rail 2, allowing the end of the tray 3 to slide more smoothly on the guide rail 2. Simultaneously, two grooves 36 are formed at the end of the guide rail 2 away from the drying chamber 1. These grooves 36 correspond to the guide wheel 35. The grooves 36 allow for dynamic sensing when the tray 3 is pushed into the drying chamber 11, enabling the guide wheel 35 to approach the grooves 36. This facilitates knowing whether the tray 3 has been pushed into the drying chamber 11 and provides a simple positioning effect for the tray 3.
[0038] In one embodiment, refer to Figure 4 , Figure 6 , Figure 8 Side baffles 21 are provided on the opposite surfaces of the two symmetrical guide rails 2, which can limit the position of the tray 3 on the guide rail 2, so that when the mounting rod 31 is on the guide rail 2, the tray 3 can be prevented from swaying left and right.
[0039] In one embodiment, refer to Figure 4 , Figure 5 , Figure 7A connecting rod 4 is slidably mounted on the guide rail 2 near the front end of the drying chamber 1. A clamping block 45 is rotatably connected to the connecting rod 4. A fixing ring 46 is fixedly connected to the connecting rod 4 on both sides of the clamping block 45. A buckle block 43 is fixedly connected to the inner wall on both sides of the drying chamber 11. A pad block 44 is fixedly connected to the buckle block 43. A buckle rod 41 is fixedly connected to the connecting rod 4. Limiting plates 47 are symmetrically fixedly connected to the guide rail 2. The clamping block 45 is located between the two limiting plates 47. The function of the limiting plates 47 is to limit the clamping block 45 when the connecting rod 4 is rotated, so as to prevent the clamping block 45 from rotating with the connecting rod 4.
[0040] This embodiment, by setting a clamping block 45, can further optimize the problem of the engagement force between the insertion rod 33 and the slot 22; when the clamping block 45 is pressed against the tray 3 and the tray 3 is in a "suspended" state, the insertion rod 33 and the slot 22 can be tightly engaged, avoiding the problem of the rear end of the tray 3 tilting up and causing the tray 3 to fall.
[0041] During operation (when the tray 3 is still warm, please wear heat-resistant gloves), when the tray 3 is pulled outward, the insert rod 33 engages in the slot 22. By operating the latch rod 41, push down the connecting rod 4, and then rotate the connecting rod 4 to make the latch rod 41 enter the latch block 43. At this time, when the connecting rod 4 moves down, the pressing block 45 presses against the tray 3.
[0042] It should be noted that the connecting rod 4 and the guide rail 2 are clearance fit; the bottom surface of the clamping block 45 is provided with high temperature resistant rubber (the setting method can be bolt locking connection or a recessed groove is opened on the end face of the high temperature resistant rubber, and the clamping block 45 is fitted through the recessed groove), which is used to make the clamping block 45 in close contact with the tray 3 and to make the latching rod 41 fastened in the latching block 43 to prevent the connecting rod 4 from loosening;
[0043] After the clamping block 45 is pressed onto the pallet 3, it has a downward and fixing effect on the rear end of the pallet 3, which can further improve the stability of the pallet 3 in the "suspended" state after it is pulled out, thereby increasing the load-bearing capacity of the pallet 3 (from the previous 1.5-2kg to 3-3.5kg).
[0044] Meanwhile, the linkage 4 and the clamping block 45 can also fix the tray 3 near the front end of the drying chamber 1 after the tray 3 is fully pushed into the drying chamber 11. A handle 42 is fixedly connected to the latch 41, and the added handle 42 facilitates the operation of the linkage 4.
[0045] When it is necessary to completely remove the tray 3, disengage the latch 41 from the latch block 43, move the connecting rod 4 upward, and position the latch 41 on the pad block 44. At this time, the bottom surface of the pressing block 45 is higher than the top surface of the outer edge of the tray 3.
[0046] Then, the connecting rod 4 is moved upwards, causing the clamping block 45 to disengage from between the two limiting plates 47. The connecting rod 4 is then rotated counterclockwise, causing the clamping block 45 to rest on the top surface of the limiting plate 47. At this point, a gap remains between the clamping block 45 and the outer edge of the tray 3. During the process of pulling the tray 3 outwards, before the insert rod 33 enters the slot 22, the tray 3 is lifted upwards, thus completely removing the tray 3 from the drying chamber 11. It should be understood that the thickness of the material of the clamping block 45 is less than... Figure 5 The spacing T is the distance between the top surface of the limiting plate 47 and the bottom surface of the buckle 43. Therefore, when rotating the connecting rod 4, the clamping block 45 can be placed on the top surface of the limiting plate 47.
[0047] In one embodiment, refer to Figure 4 A limiting block 30 is fixedly connected to the inner wall of the drying chamber 11 away from the end face of the drying box 1. The limiting block 30 is located above the end of the guide rail 2. When the insertion rod 33 is equipped with a torsion spring, the limiting block 30 limits the upper end of the tray 3, which can prevent the end of the tray 3 from tilting up due to the spring force of the torsion spring when the tray 3 is under a light load.
[0048] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. An electric heating forced-air drying oven for convenient sample loading and unloading, characterized in that, The drying chamber (11) of the drying oven (1) is symmetrically fixed with guide rails (2), and a tray (3) is placed on the guide rails (2); It also includes: a mounting rod (31) symmetrically fixedly connected to the bottom surface of the tray (3), a mounting cavity (32) is opened on the bottom surface of one end of the mounting rod (31), an insert rod (33) is rotatably connected in the mounting cavity (32), and the insert rod (33) is connected to the top surface of the mounting cavity (32) by a limiting cable (34) to limit the rotation angle of the insert rod (33); The guide rail (2) has a slot (22) on its upper surface near the front end of the drying box (1). Pull the tray (3) to bring the insert (33) close to the slot (22), and one end of the insert (33) enters the slot (22) downward.
2. The electrically heated drying oven for convenient sample handling according to claim 1, characterized in that, The bottom surface of the insertion rod (33) is rotatably connected to a guide wheel (35).
3. The electrically heated drying oven for convenient sample handling according to claim 2, characterized in that, Two grooves (36) are provided at one end of the guide rail (2) away from the end face of the drying box (1), and the grooves (36) correspond to the guide wheel (35).
4. The electrically heated drying oven for convenient sample handling according to claim 1, characterized in that, The insertion rod (33) is rotatably connected to the mounting cavity (32) by a torsion spring.
5. An electrically heated drying oven for convenient sample handling according to claim 3 or 4, characterized in that, A connecting rod (4) is slidably mounted on the guide rail (2) near the front end of the drying chamber (1). A pressing block (45) is rotatably connected to the connecting rod (4). A fixing ring (46) is fixedly connected to the connecting rod (4) on both sides of the pressing block (45). A fastener (43) is fixedly connected to the inner wall on both sides of the drying chamber (11). A pad (44) is fixedly connected to the fastener (43). A fastener (41) is fixedly connected to the connecting rod (4). Limiting plates (47) are symmetrically fixedly connected to the guide rail (2). The pressing block (45) is located between the two limiting plates (47).
6. The electrically heated drying oven for convenient sample handling according to claim 5, characterized in that, A handle (42) is fixedly connected to the buckle (41).
7. The electrically heated drying oven for convenient sample handling according to claim 6, characterized in that, A limiting block (30) is fixedly connected to the inner wall of the drying chamber (11) away from the end face of the drying box (1), and the limiting block (30) is located above the end of the guide rail (2).
8. The electrically heated drying oven for convenient sample handling according to claim 3, characterized in that, Side baffles (21) are provided on the opposite surfaces of the two symmetrical guide rails (2).