A vacuum drying box sealing performance testing device for storing precious metals

Abstract

The present invention relates to the technical field of vacuum drying oven performance testing, and specifically to a vacuum drying oven sealing performance testing device for storing precious metals, including a mounting vertical plate, a sealing plate, a sealing mechanism and a driving unit. The present invention presses the sealing plate backwards so that all rubber rollers and all rubber strips together form the innermost sealing ring, and then presses the frame strip and the rubber frame strip and deforms the two, and integrates the outermost frame strip, the middle rubber frame strip, the innermost rubber roller and the rubber strip to form a three-layer sealing ring from the inside to the outside, ensuring the sealing effect on the inner cavity of the drying oven, ensuring the accuracy of subsequent test results, and at the same time, by inserting the plug-in column into the plug-in slot, the position of the rubber strip and the rubber roller is indirectly locked, ensuring the stability of the subsequent external air pump pressurization test process, and avoiding the problem of sealing failure during the pressurization process.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum drying oven performance detection, and in particular to a vacuum drying oven sealing performance detection device for storing precious metals. Background Art

[0002] Vacuum drying oven (see Figure 7 ) is a device specially designed and used to dry items under reduced pressure. When used to store precious metals, the drying box can provide a controlled environment that helps protect the precious metals from moisture, oxygen and other factors that may cause corrosion or deterioration. It has the characteristics of strong sealing and corrosion resistance.

[0003] In order to maintain the vacuum degree (sealing effect), anti-pollution performance and stability of the drying box, it is necessary to test the sealing performance of the drying box to ensure that the sealing performance of the drying box meets the storage requirements of precious metals. Currently, various testing methods are mainly adopted for the above-mentioned testing, such as pressure decay test method, helium dew detection method, foam test method, etc. When using the pressure decay test method, the opening of the drying box is first sealed and blocked, and then the drying box is evacuated to a certain vacuum degree (or a certain amount of gas is injected) through an external air pump, and then the pressure changes in the drying box cavity are observed over a period of time.

[0004] However, the above detection process has the following problems: currently, when the opening of the drying box is sealed, it is mainly sealed by a sealing cover, which is mainly composed of a cover body and a rubber ring thereon. The opening of the drying box is pressed tightly by external pressure to achieve sealing. However, the sealing effect brought about by such a simple operation is not ideal, and the sealing effect required for the detection is high. Therefore, the above sealing operation is difficult to ensure that the sealing effect of the opening of the drying box meets the detection requirements. Poor sealing effect will directly lead to a decrease in the accuracy of the detection result, and even cause the detection result to be invalid. Summary of the invention

[0005] Based on this, it is necessary to provide a vacuum drying box sealing performance detection device for storing precious metals, aiming to solve the above-mentioned problems of the prior art.

[0006] The present application provides a sealing performance testing device for a vacuum drying box for storing precious metals, comprising: a mounting vertical plate, the mounting vertical plate being arranged at the rear side of the drying box, two mounting columns being fixedly arranged on the front end surface of the mounting vertical plate, which are symmetrical up and down and whose axes extend from the rear to the front, L-shaped frames being slidably installed on both mounting columns, a sealing plate being fixedly arranged between the two L-shaped frames, two hydraulic cylinders distributed up and down being fixedly arranged on the front end surface of the mounting vertical plate, a pushing plate being rotatably arranged on the telescopic end of the hydraulic cylinder, and two testing pipes being installed through the front end surface of the sealing plate.

[0007] A sealing mechanism, wherein the sealing plate and the mounting vertical plate are jointly provided with a sealing mechanism for sealing the opening of the drying box, the sealing mechanism comprising a frame-type strip, a frame-type strip made of rubber material is fixedly provided on the rear end face of the sealing plate, four movable plates are slidably provided on the rear end face of the sealing plate, and the four movable plates are distributed in a cross shape, a movable block is slidably provided on the movable plate, a clamping plate is provided on the end face of the movable block away from the center position of the sealing plate, a rubber strip is fixedly provided on the front end face of the clamping plate, and the rubber strips corresponding to the upper and lower clamping plates are horizontally arranged, and the rubber strips corresponding to the left and right clamping plates are vertically arranged, and a rubber roller for clamping the area between the two adjacent rubber strips is commonly provided on two adjacent clamping plates.

[0008] The sealing mechanism also includes a driving unit. The sealing plate and the mounting vertical plate are jointly provided with a driving unit for driving the rubber strip and the rubber roller to press against each other to form an inner ring seal.

[0009] According to a favorable embodiment, the sealing mechanism also includes a connecting column, and the opposite back surfaces of the left and right moving blocks are fixedly provided with connecting columns, and the clamping plates in the left and right directions are fixedly provided on the corresponding connecting columns. Connecting rods are slidably penetrated through the upper and lower moving blocks, and the corresponding upper and lower clamping plates are fixedly provided on the corresponding connecting rods. A spring mounted on the connecting rod is fixedly provided between the upper and lower clamping plates and the corresponding moving blocks.

[0010] According to an advantageous embodiment, a pressing plate is fixedly provided on the end surface of the abutting plate facing the center of the sealing plate, and the pressing plate is located on a side of the corresponding rubber strip close to the center of the sealing plate.

[0011] According to a favorable embodiment, the sealing mechanism further comprises a telescopic rod 1, and two telescopic rods 1 which are symmetrical on the left and right and whose axes extend from left to right are fixedly arranged on opposite back surfaces of the upper and lower movable plates via a connecting frame, and a rectangular block is fixedly arranged on the telescopic end of the telescopic rod 1 via a connecting block 1, and a rubber roller is fixedly arranged on the front end surface of the corresponding rectangular block, and telescopic rods 2 with vertical axes are fixedly arranged on the upper and lower end surfaces of the left and right movable plates, and the telescopic rods 2 are fixedly connected to the adjacent rectangular block via a connecting block 2.

[0012] According to a preferred embodiment, the driving unit includes a central shaft 1, and the sealing plate is rotatably penetrated by the central shaft 1 with an axis extending from front to rear. A gear 1 located on the rear side of the sealing plate is fixedly sleeved on the central shaft 1, and a tooth plate 1 meshing with the gear 1 is fixedly provided on the end surface of the movable plate facing the gear 1, and the tooth plate 1 corresponding to the left and right movable plates and the tooth plate 1 corresponding to the up and down movable plates are staggered front and back.

[0013] According to a favorable embodiment, the drive unit also includes a transverse frame, and the right end faces of the sealing plate and the mounting vertical plate are fixedly provided with the transverse frame, a transmission shaft with an axis extending from front to rear is rotatably passed through the front transverse frame, and the transmission shaft and the central axis are connected via a sprocket chain transmission, and a sliding cylinder with a colinear axis of the transmission shaft is slidably passed through the rear transverse frame, and a spiral groove is opened inside the sliding cylinder, and a mating block mating with the spiral groove is fixedly provided on the transmission shaft.

[0014] According to a favorable embodiment, a mounting circular plate is fixedly mounted on the sliding cylinder, and a spring 2 mounted on the outside of the sliding cylinder is fixedly mounted between the mounting circular plate and the rear transverse frame. The sealing mechanism also includes a reference block, and the end surface of the rubber strip away from the center of the sealing plate is fixedly mounted with a reference block.

[0015] According to a favorable embodiment, the sealing mechanism also includes an alignment group, which is arranged on the mounting vertical plate, and the alignment group includes a sliding block, which slides up and down and has two sliding blocks distributed up and down installed therethrough, the front end surface of the sliding block is fixedly provided with a clamping plate, the rear end surface of the mounting vertical plate is rotatably provided with a central axis 2 extending from front to rear, a gear 2 is fixedly sleeved on the central axis 2, a tooth plate 2 meshing with the gear 2 is fixedly provided on the sliding block, and the two tooth plates 2 are left-right symmetrical about the axis of the central axis 2.

[0016] According to a favorable embodiment, the drive unit also includes an L-shaped plate, the rear end face of the mounting vertical plate is fixedly provided with the L-shaped plate, a rotating shaft with an axis extending from front to rear is rotatably installed and penetrated on the L-shaped plate, the rotating shaft and the second central axis are also connected for transmission via a sprocket chain, a spring telescopic rod is fixedly provided on the front end face of the rotating shaft, a square transmission block is fixedly provided on the telescopic end of the spring telescopic rod, a slot cooperating with the transmission block is provided on the rear end face of the transmission shaft, and the rear end of the slot is chamfered.

[0017] According to a favorable embodiment, the sealing plate and the clamping plate are jointly provided with an auxiliary group, and the auxiliary group includes a fixed plate, and the upper and lower sides of the sealing plate are fixedly provided with fixed plates, and an adjustment block is slidably provided on the fixed plate, and a through groove is provided on the right end face of the fixed plate, and a bolt passing through the through groove is fixedly provided on the right end face of the adjustment block, and a nut is threaded on the bolt, and a plug-in column is slidably inserted into the fixed plate forward and backward, and a plug-in groove is provided on the front end face of the clamping plate.

[0018] In summary, the present invention includes at least one of the following beneficial effects: First, the present invention presses the sealing plate backward so that all rubber rollers and all rubber strips together form the innermost sealing ring, and then presses the frame strip and the rubber frame strip to deform the two, and combines the outermost frame strip, the middle rubber frame strip, the innermost rubber roller and the rubber strip to form a three-layer sealing ring from the inside to the outside, thereby ensuring the sealing effect on the inner cavity of the drying box and the accuracy of subsequent test results. At the same time, the plug-in column is inserted into the plug-in slot to indirectly lock the position of the rubber strip and the rubber roller, thereby ensuring the stability of the subsequent external air pump pressurization test process and avoiding the problem of sealing failure during the pressurization process.

[0019] 2. The present invention limits the sealing plate, the clamping plate and the mounting vertical plate by inserting the plug-in column into the corresponding plug-in groove on the clamping plate, so as to comprehensively form a stable frame and improve the stability during the detection process. Secondly, the transmission shaft, the first gear plate and the second gear plate are indirectly locked through the above-mentioned limiting method, that is, the position of the rubber strip and the rubber roller is locked, thereby ensuring the stability of the subsequent external air pump pressurization process and avoiding the problem of sealing failure during the pressurization process.

[0020] 3. The present invention uses the rubber strip to drive the reference block thereon to move backward synchronously and press it on the front end surface of the drying box, so that the front end of the rubber strip is flush with the rubber frame strip. The frame strip, rubber frame strip, rubber roller and rubber strip are combined to form three sealing rings, and the rubber frame strip, rubber strip and rubber roller are all tightly attached to the sealing plate. Therefore, the three sealing rings seal the opening of the drying box from the inside to the outside, avoiding the problem of affecting the detection results due to poor sealing effect.

[0021] Fourth, the frame-shaped strips provided in the present invention can cover the rubber frame strips and the opening of the drying box, and four rubber rollers and four rubber strips together form the innermost sealing ring, so that the detection equipment can be applied to the sealing detection operations of drying boxes with openings of different sizes, thereby improving the universality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 A three-dimensional structural schematic diagram of a vacuum drying box sealing performance detection device for storing precious metals provided by the present invention is shown.

[0024] Figure 2A partial cross-sectional schematic diagram of a vacuum drying box sealing performance detection device for storing precious metals provided by the present invention is shown.

[0025] Figure 3 A schematic diagram of the three-dimensional structure between the sealing plate, the rubber strip and the rubber roller provided by the present invention is shown.

[0026] Figure 4 A partial cross-sectional schematic diagram between the sealing plate, the clamping plate and the sliding cylinder provided by the present invention is shown.

[0027] Figure 5 A partial cross-sectional schematic diagram of the transmission shaft, the sliding cylinder and the spring telescopic rod provided by the present invention is shown.

[0028] Figure 6 The present invention provides Figure 5 Enlarged view of point A in the middle.

[0029] Figure 7 A schematic diagram of the three-dimensional structure of a vacuum drying oven is shown.

[0030] The above drawings include the following reference numerals: 1. mounting vertical plate; 10. mounting column; 11. L-shaped frame; 2. sealing plate; 3. pushing plate; 4. detection pipeline; 5. sealing mechanism; 50. frame strip; 500. moving plate; 501. moving block; 502. pressing plate; 503. rubber strip; 504. rubber roller; 51. connecting column; 510. connecting rod; 511. spring 1; 52. pressing plate; 53. telescopic rod 1; 530. rectangular block; 531. telescopic rod 2; 54. reference block; 55. alignment group; 550. sliding block; 551. clamp Holding plate; 552, central axis two; 553, gear two; 554, tooth plate two; 56, fixing plate; 560, adjusting block; 561, through groove; 562, bolt; 563, plug-in column; 564, plug-in groove; 6, driving unit; 60, central axis one; 600, gear one; 601, tooth plate one; 61, horizontal frame; 610, transmission shaft; 611, sliding cylinder; 612, spiral groove; 613, matching block; 614, mounting circular plate; 615, spring two; 62, L-shaped plate; 620, rotating shaft; 621, spring telescopic rod; 622, transmission block. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0032] like Figure 1 As shown, a vacuum drying box sealing performance testing device for storing precious metals comprises: a mounting vertical plate 1, wherein the mounting vertical plate 1 is arranged at the rear side of the drying box, and the front end surface of the mounting vertical plate 1 is fixedly provided with two mounting columns 10 which are symmetrical up and down and whose axes extend from the back to the front, and L-shaped frames 11 are slidably installed on the two mounting columns 10, and a sealing plate 2 is fixedly arranged between the two L-shaped frames 11, and the front end surface of the mounting vertical plate 1 is fixedly provided with two hydraulic cylinders distributed up and down, and a push plate 3 is rotatably arranged at the telescopic end of the hydraulic cylinder, and two detection pipes 4 are installed through the front end surface of the sealing plate 2, wherein one detection pipe 4 is connected to an external air pump, and the other detection pipe 4 is connected to an air tightness tester (the external air pump and the air tightness tester are both prior art and are not shown in the figure).

[0033] like Figure 1 , Figure 2 and Figure 3 As shown, the sealing plate 2 and the vertical mounting plate 1 are jointly provided with a sealing mechanism 5 for sealing the opening of the drying box, the sealing mechanism 5 includes a frame-type strip 50, a frame-type strip 50 made of rubber material is fixedly provided on the rear end face of the sealing plate 2, and the inner side area of ​​the frame-type strip 50 is larger than the opening area of ​​the drying box, four movable plates 500 are slidably provided on the rear end face of the sealing plate 2, and the four movable plates 500 are distributed in a cross shape, a movable block 501 is slidably provided on the movable plate 500, a clamping plate 502 is provided on the end face of the movable block 501 away from the center position of the sealing plate 2, a rubber strip 503 is fixedly provided on the front end face of the clamping plate 502, and the rubber strips 503 corresponding to the upper and lower clamping plates 502 are horizontally arranged, and the rubber strips 503 corresponding to the left and right clamping plates 502 are vertically arranged, and two adjacent clamping plates 502 are jointly provided with a rubber roller 504 for clamping the area between the two adjacent rubber strips 503.

[0034] like Figure 1 and Figure 2 As shown, the sealing mechanism 5 further includes a driving unit 6, and the sealing plate 2 and the mounting vertical plate 1 are jointly provided with a driving unit 6 for driving the rubber strip 503 and the rubber roller 504 to press against each other to form an inner ring seal.

[0035] like Figure 1 , Figure 2 , Figure 3 and Figure 7As shown, when the drying box is placed on a horizontal ground, and there is enough space below the drying box to meet the use requirements of the push plate 3 and the L-shaped frame 11, during operation, the staff installs the vertical plate 1 to the rear side of the drying box, and places the two installation columns 10 on the upper and lower sides of the drying box. Then, the sealing plate 2 is installed and placed on the front side of the drying box by sliding the L-shaped frame 11 to the corresponding installation columns 10, and the position of the sealing plate 2 is adjusted so that the frame strip 50 covers the opening of the drying box and the rubber frame strip of the drying box (see Figure 7 ), and make the abutting plate 502, all rubber rollers 504 and all rubber strips 503 located at the front side of the drying box opening.

[0036] The push plate 3 is manually rotated so that the push plate 3 is located in front of the sealing plate 2, and then the hydraulic cylinder works to drive the push plate 3 to move backward, and the push plate 3 pushes the sealing plate 2 to move backward. The driving unit 6 is driven to work through the backward movement process, and the left and right pressing plates 502 are moved away from each other, and the upper and lower pressing plates 502 are moved away from each other through the operation of the driving unit 6. The pressing plate 502 drives the rubber strip 503 thereon to press against the inner wall of the drying box opening, and at the same time, the four rubber rollers 504 are respectively pressed against the two adjacent rubber strips 503, and all the rubber rollers 504 and All rubber strips 503 together form the innermost sealing ring. At the same time, as the hydraulic cylinder continues to operate, the sealing plate 2 moves forward to press the frame strip 50 and the rubber frame strip, and deform the two. The outermost frame strip 50, the middle rubber frame strip, the innermost rubber roller 504 and the rubber strip 503 form a three-layer sealing ring as a whole to ensure the sealing effect on the inner cavity of the drying box. After that, the external air pump works to pump gas into the drying box, and the air tightness tester is used to test whether the pressure in the drying box changes, thereby completing the inspection of the sealing performance of the drying box.

[0037] like Figure 1 , Figure 2 and Figure 3 As shown, the sealing mechanism 5 also includes a connecting column 51, and the opposite back surfaces of the left and right moving blocks 501 are fixedly provided with the connecting column 51, and the clamping plates 502 in the left and right directions are fixedly provided on the corresponding connecting columns 51, and the upper and lower moving blocks 501 are both slidably penetrated by connecting rods 510, and the upper and lower corresponding clamping plates 502 are fixedly provided on the corresponding connecting rods 510, and a spring 511 mounted on the connecting rod 510 is fixedly provided between the upper and lower clamping plates 502 and the corresponding moving blocks 501.

[0038] like Figure 3 As shown, a pressing plate 52 is fixedly provided on the end surface of the pressing plate 502 facing the center of the sealing plate 2 , and the pressing plate 52 is located on a side of the corresponding rubber strip 503 close to the center of the sealing plate 2 .

[0039] During operation, the driving unit 6 operates to make the pressing plate 502 drive the rubber strip 503 and the pressing plate 52 thereon to move synchronously. When the rubber strip 503 is close to the inside of the drying box, the pressing plate 502 drives the corresponding pressing plate 52 to press the rubber strip 503 and deform the rubber strip 503 to ensure the sealing effect of the rubber strip 503.

[0040] like Figure 1 and Figure 3 As shown, the sealing mechanism 5 also includes a telescopic rod 1 53, and two telescopic rods 1 53 with left-right symmetry and an axis extending from left to right are fixedly arranged on the opposite back surfaces of the upper and lower movable plates 500 through a connecting frame, and a rectangular block 530 is fixedly arranged on the telescopic end of the telescopic rod 1 53 through a connecting block 1, and a rubber roller 504 is fixedly arranged on the front end surface of the corresponding rectangular block 530, and telescopic rods 2 531 with a vertical axis are fixedly arranged on the upper and lower end surfaces of the left and right movable plates 500, and the telescopic rods 2 531 are fixedly connected to the adjacent rectangular block 530 through a connecting block 2.

[0041] like Figure 1 , Figure 2 and Figure 3 As shown, the driving unit 6 includes a central shaft 60, and the sealing plate 2 is rotatably penetrated by the central shaft 60 extending from front to rear, and a gear 600 located on the rear side of the sealing plate 2 is fixedly sleeved on the central shaft 60, and the end surface of the movable plate 500 facing the gear 600 is fixedly provided with a tooth plate 601 meshing with the gear 600, and the tooth plate 601 corresponding to the left and right movable plates 500 and the tooth plate 601 corresponding to the up and down movable plates 500 are staggered front and back.

[0042] like Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the driving unit 6 also includes a transverse frame 61, and the right end faces of the sealing plate 2 and the mounting vertical plate 1 are fixedly provided with the transverse frame 61, and a transmission shaft 610 with an axis extending from front to rear is rotatably passed through the front transverse frame 61, and the transmission shaft 610 is connected to the central axis through a sprocket chain transmission, and a sliding cylinder 611 colinear with the axis of the transmission shaft 610 is passed through the rear transverse frame 61 for sliding back and forth, and a spiral groove 612 is opened inside the sliding cylinder 611, and a matching block 613 matching with the spiral groove 612 is fixedly provided on the transmission shaft 610.

[0043] like Figure 3 , Figure 4 and Figure 5As shown, a mounting circular plate 614 is fixedly mounted on the sliding cylinder 611, and a spring 615 mounted on the outside of the sliding cylinder 61 is fixedly mounted between the mounting circular plate 614 and the rear transverse frame 61. The sealing mechanism 5 also includes a reference block 54, and the end faces of the rubber strip 503 away from the center of the sealing plate 2 are fixedly mounted with reference blocks 54.

[0044] During operation, first manually place the mounting vertical plate 1 on the rear side of the drying box, and install the sealing plate 2 on the front side of the drying box by sliding the L-shaped frame 11 onto the mounting column 10, and adjust the positions of the sealing plate 2 and the mounting vertical plate 1 in the left and right directions so that all the rubber strips 503 and the rubber rollers 504 are located in the opening of the drying box and the frame strips 50 cover the rubber frame strips. Through the above installation operation, the transmission shaft 610 and the sliding cylinder 611 are opposite to each other front and back.

[0045] The push plate 3 is manually rotated so that the push plate 3 and the sealing plate 2 are opposite to each other front and back, and the hydraulic cylinder works so that its telescopic end drives the push plate 3 to move backward, and the two push plates 3 jointly push the sealing plate 2 to move backward, and the sealing plate 2 drives the transmission shaft 610 to move backward through the transverse frame 61 and inserts it into the sliding cylinder 611. As the sealing plate 2 continues to move, the transmission shaft 610 drives the matching block 613 thereon to move backward and gradually cooperate with the spiral groove 612, so that the transmission shaft 610 rotates, and the sprocket chain transmission between the transmission shaft 610 and the central axis 1 60 makes the central axis 1 60 drive the gear 1 600 to rotate synchronously, and the meshing between the gear 1 600 and the four tooth plates 1 601 makes the tooth plates 1 601 move synchronously, and the two relative tooth plates 1 601 move away from each other, and the tooth plates 1 601 drive the corresponding movable plates 500 to move synchronously.

[0046] The two movable plates 500 facing each other up and down drive the corresponding rubber strips 503 to gradually contact the inner wall of the drying box opening, and after the contact, the two rubber strips 503 and the corresponding pressing plates 502 stop moving. As the movable plate 500 continues to move, the spring 1 511 is continuously compressed, and the corresponding rubber strip 503 is pressed against the inner wall of the drying box by the elastic force generated by the compression of the spring 1 511. As the central axis 1 60 continues to rotate, the movable plates 500 on the left and right sides drive the rubber strips 503 thereon to move synchronously until they are in close contact with the inner wall of the drying box, and as the movable plate 500 continues to move, the pressing plate 52 presses the corresponding rubber strip 503, so that the rubber strip 503 is compressed and deformed, thereby improving the contact between the rubber strip 503 and the drying box. The degree of tightness, secondly, during the movement of the upper and lower movable plates 500, the upper and lower clamping plates 502 drive the corresponding rubber rollers 504 to move synchronously in the up and down directions through the telescopic rod 1 53. At the same time, in this process, the left and right clamping plates 502 drive the rubber rollers 504 to move synchronously in the left and right directions through the telescopic rod 2 531. In summary, while completing the pressing operation of the rubber strip 503, the four rubber rollers 504 are pressed between two adjacent rubber strips 503, and the rubber rollers 504 are deformed through continuous movement, so that the four rubber rollers 504 and the four rubber strips 503 jointly form the innermost sealing ring, and the above method is convenient for applying the sealing detection operation of drying ovens with different sizes of openings, thereby improving the universality of the device.

[0047] When the rubber strip 503 gradually moves and presses against the drying box, the transmission shaft 610 stops rotating and the transmission shaft 610 pushes the sliding cylinder 611 backward through the cooperation between the matching block 613 and the spiral groove 612 thereon, and the sliding cylinder 611 moves backward and causes the spring 2 615 to be compressed. At the same time, the sealing plate 2 continues to move backward, and the frame strip 50 on the sealing plate 2 presses against the front end surface of the drying box and is compressed and deformed. The sealing plate 2 presses the rubber frame strip and deforms it, and the rubber strip 503 drives the reference block 54 thereon to move backward synchronously and press on the front end surface of the drying box, so that the front end of the rubber strip 503 is flush with the rubber frame strip. In summary, the outermost frame strip 50, the middle rubber frame strip, the innermost rubber roller 504 and the rubber strip 503 form a three-layer sealing ring as a whole, which ensures that the sealing quality at the opening of the drying box meets the detection requirements and avoids the problem of affecting the detection results due to poor sealing effect at this location.

[0048] like Figure 1 , Figure 2 and Figure 4As shown, the sealing mechanism 5 also includes an alignment group 55, and the mounting vertical plate 1 is provided with the alignment group 55, and the alignment group 55 includes a sliding block 550, and the mounting vertical plate 1 slides up and down and is penetrated by two sliding blocks 550 distributed up and down, and the front end surface of the sliding block 550 is fixedly provided with a clamping plate 551, and the rear end surface of the mounting vertical plate 1 is rotatably provided with a center axis 2 552 extending from front to rear, and a gear 2 553 is fixedly sleeved on the center axis 2 552, and a tooth plate 2 554 meshing with the gear 2 553 is fixedly provided on the sliding block 550, and the two tooth plates 2 554 are left-right symmetrical about the axis of the center axis 2 552.

[0049] like Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the driving unit 6 also includes an L-shaped plate 62, and the rear end face of the mounting vertical plate 1 is fixedly provided with the L-shaped plate 62, and a rotating shaft 620 with an axis extending from front to rear is rotatably installed on the L-shaped plate 62 and penetrates through it, and the rotating shaft 620 and the central axis 2 552 are also connected and transmitted through a sprocket chain, and a spring telescopic rod 621 is fixedly provided on the front end face of the rotating shaft 620, and a square transmission block 622 is fixedly provided at the telescopic end of the spring telescopic rod 621, and a card slot cooperating with the transmission block 622 is provided on the rear end face of the transmission shaft 610, and the rear end of the card slot is chamfered.

[0050] It should be particularly noted that, during the process of installing the sealing plate 2 and the vertical plate 1, the transmission shaft 610 is not inserted into the sliding cylinder 611, and the sliding block 550 is manually moved so that the distance between the two clamping plates 551 and the upper and lower sides of the drying box is a specified value. Then, the sealing plate 2 is installed on the mounting column 10 and the rubber strip 503 is located in the opening of the drying box. Then, the movable plate 500 is manually adjusted so that the distance between the rubber strips 503 on the left and right movable plates 500 and the inner wall of the drying box is greater than the above-specified value and the difference with the above-specified value is the distance that the movable plate 500 needs to move during the subsequent compression and deformation of the rubber strip 503, and then the sealing operation is performed.

[0051] As the sealing plate 2 moves backward, the sealing plate 2 drives the transmission shaft 610 to move backward into the sliding cylinder 611. During this process, the transmission block 622 is inserted into the slot. Then, the transmission shaft 610 rotates through the cooperation between the sliding cylinder 611 and the matching block 613. The transmission shaft 610 drives the spring telescopic rod 621 and the rotating shaft 620 to rotate synchronously through the cooperation between the transmission block 622 and the slot. The rotating shaft 620 drives the central shaft 2 552 and the gear 2 553 to rotate synchronously through the synchronous sprocket chain transmission. Through the meshing between the gear 2 553 and the two tooth plates 2 554, the tooth plates 2 554 are engaged. 4 drives the corresponding sliding block 550 and the clamping plate 551 to move synchronously, and the two clamping plates 551 are close to each other and pressed against the upper and lower sides of the drying box, so that the axis of the central shaft 60 is located at the middle position in the upper and lower directions of the drying box, and subsequently the left and right rubber strips 503 are pressed against the left and right inner walls of the opening of the drying box, so that the axis of the central shaft 60 is located at the middle position in the left and right directions of the drying box, so the central shaft 60 is located at the center position of the drying box, so that the rubber strip 503 and the rubber roller 504 can move to the four inner side walls and the top corner position of the drying box.

[0052] like Figure 1 and Figure 4 As shown, the sealing plate 2 and the clamping plate 551 are jointly provided with an auxiliary group, and the auxiliary group includes a fixed plate 56. The sealing plate 2 is fixedly provided with fixed plates 56 on both the upper and lower sides, and an adjusting block 560 is slidably provided on the fixed plate 56. A through slot 561 is provided on the right end face of the fixed plate 56, and a bolt 562 penetrating the through slot 561 is fixedly provided on the right end face of the adjusting block 560, and a nut is threadedly fitted on the bolt 562. A plug-in column 563 is slidably inserted into the fixed plate 56 forward and backward, and a plug-in slot 564 is provided on the front end face of the clamping plate 551.

[0053] During operation, before conducting the inspection, the adjustment block 560 is moved according to the height of the drying oven, so that the adjustment block 560 drives the plug-in column 563 thereon to be opposite to the plug-in groove 564 on the clamping plate 551 after subsequent clamping, and then the nut is manually tightened onto the bolt 562 to fix the adjustment block 560. Secondly, the above adjustment process facilitates the inspection of drying ovens of different sizes.

[0054] After the clamping plate 551 clamps the upper and lower sides of the drying box and the sealing plate 2 seals the drying box, the plug-in column 563 is manually moved so that the plug-in column 563 is inserted into the plug-in groove 564, so the plug-in column 563, the sealing plate 2, the clamping plate 551 and the mounting vertical plate 1 are locked, and the transmission shaft 610, the tooth plate 1 601 and the tooth plate 2 554 are locked at the same time, that is, the position of the rubber strip 503 and the rubber roller 504 are locked to ensure the stability during the subsequent external air pump pressurization process and avoid the problem of sealing failure during the pressurization process.

[0055] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0056] In addition, the terms "first", "second", "number one", "number two" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "number one", "number two" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vacuum drying box sealing performance testing device for storing precious metals, characterized in that: include: A mounting plate (1) is arranged at the rear side of the drying box. Two mounting columns (10) are fixedly arranged on the front end surface of the mounting plate (1) and are symmetrical in the upper and lower directions and whose axes extend from the rear to the front. L-shaped frames (11) are slidably mounted on the two mounting columns (10) in the forward and backward directions. A sealing plate (2) is fixedly arranged between the two L-shaped frames (11). Two hydraulic cylinders distributed in the upper and lower directions are fixedly arranged on the front end surface of the mounting plate (1). A push plate (3) is rotatably arranged at the telescopic end of the hydraulic cylinder. Two detection pipes (4) are installed through the front end surface of the sealing plate (2); The sealing mechanism (5) is provided on the sealing plate (2) and the mounting vertical plate (1) for sealing the opening of the drying box. The sealing mechanism (5) comprises a frame strip (50). The rear end surface of the sealing plate (2) is fixedly provided with a frame strip (50) made of a rubber material. The rear end surface of the sealing plate (2) is provided with four movable plates (500) for sliding. The four movable plates (500) are arranged in a cross shape. The movable plates (500) are provided with movable blocks for sliding forward and backward movement. (501), a pressing plate (502) is arranged on the end surface of the moving block (501) away from the center of the sealing plate (2), a rubber strip (503) is fixedly arranged on the front end surface of the pressing plate (502), and the rubber strips (503) corresponding to the upper and lower pressing plates (502) are arranged horizontally, and the rubber strips (503) corresponding to the left and right pressing plates (502) are arranged vertically, and a rubber roller (504) is commonly arranged on two adjacent pressing plates (502); The sealing mechanism (5) further comprises a driving unit (6), and the sealing plate (2) and the mounting vertical plate (1) are jointly provided with the driving unit (6) for driving the rubber strip (503) and the rubber roller (504) to press against each other to form an inner ring seal.

2. The sealing performance testing device of a vacuum drying oven for storing precious metals according to claim 1, characterized in that: The sealing mechanism (5) further comprises a connecting column (51), and the opposite back surfaces of the left and right moving blocks (501) are fixedly provided with the connecting column (51), and the left and right clamping plates (502) are fixedly provided on the corresponding connecting columns (51), and the upper and lower moving blocks (501) are both slidably penetrated by connecting rods (510), and the upper and lower corresponding clamping plates (502) are fixedly provided on the corresponding connecting rods (510), and a spring (511) sleeved on the connecting rod (510) is fixedly provided between the upper and lower clamping plates (502) and the corresponding moving blocks (501).

3. The sealing performance testing device of a vacuum drying box for storing precious metals according to claim 1, characterized in that: A pressing plate (52) is fixedly arranged on the end surface of the abutting plate (502) facing the center of the sealing plate (2), and the pressing plate (52) is located on the side of the corresponding rubber strip (503) close to the center of the sealing plate (2).

4. The sealing performance testing device of a vacuum drying oven for storing precious metals according to claim 1, characterized in that: The sealing mechanism (5) further comprises a telescopic rod (53), two telescopic rods (53) symmetrically arranged on opposite sides of the upper and lower movable plates (500) are fixedly provided via a connecting frame, and rectangular blocks (530) are fixedly provided on opposite sides of the telescopic ends of the telescopic rods (53) via a connecting block (5), and a rubber roller (504) is fixedly provided on the front end surface of the corresponding rectangular block (530), and telescopic rods (531) with vertical axes are fixedly provided on the upper and lower end surfaces of the left and right movable plates (500), and the telescopic rods (531) are fixedly connected to the adjacent rectangular blocks (530) via a connecting block (530).

5. The sealing performance testing device of a vacuum drying oven for storing precious metals according to claim 1, characterized in that: The driving unit (6) comprises a central shaft (60), the sealing plate (2) is rotatably provided with a central shaft (60) with an axis extending from front to rear, the central shaft (60) is fixedly sleeved with a gear (600) located at the rear side of the sealing plate (2), and the end surface of the movable plate (500) facing the gear (600) is fixedly provided with a tooth plate (601) meshing with the gear (600), and the tooth plate (601) corresponding to the left and right movable plates (500) and the tooth plate (601) corresponding to the up and down movable plates (500) are staggered front and back.

6. The sealing performance testing device of a vacuum drying oven for storing precious metals according to claim 1, characterized in that: The driving unit (6) further comprises a transverse frame (61), the right end surfaces of the sealing plate (2) and the mounting vertical plate (1) are both fixedly provided with the transverse frame (61), a transmission shaft (610) with an axis extending from front to rear is rotatably passed through the front transverse frame (61), the transmission shaft (610) and the central axis are connected via a sprocket chain transmission, a sliding cylinder (611) with an axis colinear with the transmission shaft (610) is slidably passed through the rear transverse frame (61), a spiral groove (612) is provided inside the sliding cylinder (611), and a matching block (613) matching with the spiral groove (612) is fixedly provided on the transmission shaft (610).

7. The sealing performance testing device of a vacuum drying oven for storing precious metals according to claim 6, characterized in that: A mounting circular plate (614) is fixedly mounted on the sliding cylinder (611), and a second spring (615) mounted on the outside of the sliding cylinder (611) is fixedly mounted between the mounting circular plate (614) and the rear transverse frame (61). The sealing mechanism (5) also includes a reference block (54), and the end surface of the rubber strip (503) away from the center of the sealing plate (2) is fixedly mounted with a reference block (54).

8. The sealing performance testing device of a vacuum drying box for storing precious metals according to claim 6, characterized in that: The sealing mechanism (5) further comprises an alignment group (55), the alignment group (55) being arranged on the mounting vertical plate (1), the alignment group (55) comprising a sliding block (550), two sliding blocks (550) being arranged on the mounting vertical plate (1) and being slidable up and down and penetrating therethrough and being distributed up and down, a clamping plate (551) being fixedly arranged on the front end surface of the sliding block (550), a central axis (552) extending from front to rear being rotatably arranged on the rear end surface of the mounting vertical plate (1), a gear (553) being fixedly sleeved on the central axis (552), a tooth plate (554) meshing with the gear (553) being fixedly arranged on the sliding block (550), and the two tooth plates (554) being symmetrical about the axis of the central axis (552).

9. The sealing performance testing device of a vacuum drying box for storing precious metals according to claim 8, characterized in that: The driving unit (6) further comprises an L-shaped plate (62), the rear end face of the mounting vertical plate (1) being fixedly provided with the L-shaped plate (62), a rotating shaft (620) with an axis extending from front to rear being rotatably and penetratingly installed on the L-shaped plate (62), the rotating shaft (620) and the second central shaft (552) being connected and driven via a sprocket chain, a spring telescopic rod (621) being fixedly provided on the front end face of the rotating shaft (620), a square transmission block (622) being fixedly provided at the telescopic end of the spring telescopic rod (621), a slot cooperating with the transmission block (622) being provided on the rear end face of the transmission shaft (610), the rear end of the slot being chamfered.

10. The sealing performance testing device of a vacuum drying box for storing precious metals according to claim 8, characterized in that: The sealing plate (2) and the clamping plate (551) are jointly provided with an auxiliary group, the auxiliary group comprising a fixed plate (56), the fixing plates (56) are fixedly provided on the upper and lower sides of the sealing plate (2), an adjusting block (560) is slidably provided on the fixing plate (56), a through slot (561) is provided on the right end surface of the fixing plate (56), a bolt (562) penetrating the through slot (561) is fixedly provided on the right end surface of the adjusting block (560), a nut is threadedly engaged on the bolt (562), a plug-in column (563) is slidably plugged in the fixing plate (56) forwards and backwards, and a plug-in slot (564) is provided on the front end surface of the clamping plate (551).

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