Special barrel air tightness inspection device for freeze dryer

Abstract

The utility model discloses a special barrel air tightness inspection device for a freeze dryer, which belongs to the field of air tightness inspection equipment and comprises a cylinder, a guide component, a sealing disc, a water tank component, a workbench and a support body, the guide component comprises a guide rod and a guide sleeve, and the water tank component comprises a water tank and a disc. The guide rod and the guide sleeve ensure that the sealing disc is consistent in lifting posture and smoothly enters and exits from the barrel body of the freeze dryer, so that the service life of a sealing ring of the sealing disc is prolonged; fine positioning and clamping components are not arranged for the barrel body and the water tank, the situation that the sealing ring is damaged when precision maintenance work and precision are abnormal does not exist in long-term use, and the device is well matched with the operation process of air tightness inspection of the barrel body of the freeze dryer, so that the operation efficiency is greatly improved, and the equipment investment cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of air tightness detection equipment, and in particular relates to an air tightness inspection device for a barrel of a freeze dryer. Background Art

[0002] The barrel of a food freeze dryer is used to hold the food to be freeze-dried. During the freeze-drying process, the vacuum level in the barrel reaches below 10 Pa. Therefore, testing the airtightness of the freeze dryer barrel is a mandatory inspection process during freeze dryer manufacturing. The existing technology lacks dedicated equipment for testing the airtightness of freeze dryer barrels. The mismatch between the equipment structure and the corresponding airtightness inspection process is poor, resulting in reduced inspection efficiency and increased equipment investment costs, hindering the optimization of freeze dryer manufacturing costs. Utility Model Content

[0003] The purpose of the utility model is to provide a barrel air tightness inspection device dedicated to a freeze dryer, so as to solve the problems mentioned in the above background technology.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A freeze dryer barrel air tightness inspection device comprises a guide assembly, a sealing plate, a water tank assembly, a workbench and a bracket body; the water tank assembly is placed on the workbench, the barrel to be inspected is placed in the water tank assembly, and the sealing plate is installed on the top of the barrel to be inspected;

[0006] The bracket body is mounted on the workbench, and includes a crossbeam and a column. The upper surface of the crossbeam is provided with a mounting plate for mounting the cylinder. The end surface of the cylinder output shaft is in contact with the top surface of the mounting plate. The crossbeam and the mounting plate are both provided with coaxial through holes. The cylinder output shaft passes through the through holes and is fixedly connected to the sealing disk.

[0007] The guide assembly includes a guide rod and a guide sleeve, wherein the guide sleeve is vertically installed and penetrates the crossbeam and is located on both sides of the cylinder, the guide rod is arranged in the guide sleeve and slides relative to the guide sleeve, and the lower end of the guide rod is fixedly connected to the sealing disk;

[0008] The sealing disk has a through hole on its surface, and the through hole has an internal thread that can be connected to an external air pipe joint; the side wall of the sealing disk has an annular groove for mounting a sealing ring, and the sealing disk and the inner wall of the barrel to be inspected form an interference fit through the sealing ring;

[0009] The water tank assembly includes a water tank and a disc. The water tank is placed flat on the workbench. The disc is fixedly installed at the center of the bottom of the water tank and is located coaxially directly below the sealing disc. The barrel to be inspected is located between the disc and the sealing disc. Furthermore, the guide assembly is provided with two sets, one on each symmetrical side of the cylinder output shaft.

[0010] Furthermore, the freeze dryer barrel air tightness inspection device further includes an operation box, which is fixed on the column of the bracket;

[0011] Furthermore, the lifting speed of the sealing disk driven by the cylinder output shaft is ≤100 mm / s;

[0012] Furthermore, the diameter of the disc is greater than 125% or more of the outer diameter of the barrel to be inspected;

[0013] Furthermore, the water tank is a rectangular water tank, and the height of the tank wall must meet the requirement that when the water level reaches two-thirds of the tank wall height, the water level can be 70 mm or more above the air path joint of the barrel to be inspected placed on the disc.

[0014] The operating process of the freeze dryer barrel air tightness inspection device is as follows:

[0015] 1. Fill the water tank with water until the water level is about two-thirds of the tank wall height;

[0016] 2. Use a special cover to seal the gas path joint of the barrel;

[0017] 3. Place the barrel with the opening facing upward on the disc so that it is directly below the sealing disc;

[0018] 4. Operate the button box to control the sealing disk to descend. During the process, adjust the position of the barrel body to be well concentric with the sealing disk so that the sealing disk is pressed into the barrel body;

[0019] 5. Operate the button box to start the external pump to increase the pressure inside the barrel. During the process, observe whether the part of the barrel submerged in the water tank is bubbling. If bubbling occurs, mark the bubbling position after removing the barrel;

[0020] 6. According to the indicator light on the button box, confirm that the barrel pressurization and pressure maintenance process is completed, and operate the button box to reduce the pressure of the barrel;

[0021] 7. Operate the button box to control the sealing disk to rise, take out the barrel body, and remove the cover of the barrel body gas line joint.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. In this new type of use, by providing a guide rod and a guide sleeve, the sealing disc is ensured to have a consistent lifting posture and to move smoothly in and out of the barrel, thereby increasing the service life of the sealing ring;

[0024] 2. A vent hole is provided on the sealing disc for connecting to an external pump body, and the structure is simple to achieve pressure increase or decrease on the barrel body;

[0025] 3. No precise positioning and clamping components are provided for the barrel body and the water tank, so as to avoid maintenance work and abnormal wear of the sealing ring caused by the decrease in positioning accuracy after repeated disassembly and assembly of the barrel body and the water tank, and the device has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the utility model's special barrel air tightness inspection device for freeze dryers;

[0027] Figure 2 for Figure 1 Observation angle rotates 180° to the observation view;

[0028] Figure 3 is a cross-sectional view of the sealing disc of the present invention;

[0029] In the figure, 1-workbench, 11-limiting bracket, 2-bracket body, 21-mounting plate, 22-cylinder, 221-cylinder output shaft, 3-guide assembly, 31-guide rod, 32-guide sleeve, 4-sealing disk, 41-groove, 42-sealing ring, 43-through hole, 431-trachea, 5-water tank assembly, 51-water tank, 52-disc, 6-barrel to be inspected, 61-air path connector, 7-operation box. DETAILED DESCRIPTION

[0030] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments given here are only used to illustrate and explain the present invention and cannot be used to limit the present invention.

[0031] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention may also have other implementation methods and variations thereof. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0032] like Figure 1-3 As shown, it includes a workbench 1, a bracket body 2, a guide assembly 3, a sealing plate 4 and a water tank assembly 5; the water tank assembly 5 is placed on the workbench 1, the barrel body 6 to be inspected is placed in the water tank assembly 5, and the sealing plate 4 is installed on the top of the barrel body 6 to be inspected;

[0033] The bracket body 2 is mounted on the workbench 1 and includes a crossbeam and a column. The upper surface of the crossbeam is provided with a mounting plate 21 for mounting the cylinder 22. The end face of the cylinder output shaft is in contact with the top surface of the mounting plate 21. The crossbeam and the mounting plate 21 are both provided with coaxial through holes. The cylinder output shaft 221 passes through the through hole and is fixedly connected to the sealing disk 4.

[0034] The guide assembly 3 includes a guide rod 31 and a guide sleeve 32. The guide sleeve 32 is vertically installed and penetrates the crossbeam and is located on both sides of the cylinder 22. The guide rod 31 is arranged in the guide sleeve 32 and slides relative to the guide sleeve 32. The lower end of the guide rod 31 is fixed to the sealing disk 4.

[0035] The surface of the sealing disk 4 is provided with a through hole 43, which has an internal thread and can be connected to an external air pipe joint; the side wall of the sealing disk 4 is provided with an annular groove 41 for mounting a sealing ring 42, and the sealing disk 4 forms an interference fit with the inner wall of the barrel body 6 to be inspected through the sealing ring 42;

[0036] The water tank assembly 5 includes a water tank 51 and a disc 52. The water tank 51 is placed flat on the workbench 1. The disc 52 is fixedly installed at the center of the bottom of the water tank 51 and is located coaxially directly below the sealing disc 4. The barrel body 6 to be inspected is located between the disc 52 and the sealing disc 4.

[0037] Furthermore, the workbench 1 is provided with two welded and fixed limiting brackets 11 for limiting the position of the water tank assembly 5 on the workbench 1;

[0038] During specific implementation, the outer diameter of the barrel body 6 to be inspected is 328 mm, the diameter of the disc 52 is 430 mm, the water tank 51 is rectangular, and the height of its tank wall is 280 mm. The lifting speed of the sealing disk 4 driven by the cylinder output shaft 221 is 70 mm / s; the through hole 43 is connected to the external air pipe joint through its internal thread, and is connected to the pump body through the air pipe, and the button box 7 is electrically connected to the external control system (the air pipe joint, pump body and control system are not shown in the figure).

[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A freeze dryer barrel air tightness inspection device, characterized in that: It includes a guide assembly, a sealing plate, a water tank assembly, a workbench and a bracket body; the water tank assembly is placed on the workbench, the barrel to be inspected is placed in the water tank assembly, and the sealing plate is installed on the top of the barrel to be inspected; The bracket body is mounted on the workbench, and includes a crossbeam and a column. The upper surface of the crossbeam is provided with a mounting plate for mounting the cylinder. The end surface of the cylinder output shaft is in contact with the top surface of the mounting plate. The crossbeam and the mounting plate are both provided with coaxial through holes. The cylinder output shaft passes through the through holes and is fixedly connected to the sealing disk. The guide assembly includes a guide rod and a guide sleeve, wherein the guide sleeve is vertically installed and penetrates the crossbeam and is located on both sides of the cylinder, the guide rod is arranged in the guide sleeve and slides relative to the guide sleeve, and the lower end of the guide rod is fixedly connected to the sealing disk; The sealing disk has a through hole on its surface, and the through hole has an internal thread that can be connected to an external air pipe joint; the side wall of the sealing disk has an annular groove for mounting a sealing ring, and the sealing disk and the inner wall of the barrel to be inspected form an interference fit through the sealing ring; The water tank assembly includes a water tank and a disc. The water tank is placed flat on the workbench. The disc is fixedly installed at the center of the bottom of the water tank and is located coaxially directly below the sealing disc. The barrel to be inspected is located between the disc and the sealing disc.

2. The freeze dryer barrel air tightness inspection device according to claim 1, characterized in that: The guide assembly is provided with two sets, and is respectively located on two symmetrical sides of the cylinder output shaft.

3. The freeze dryer barrel air tightness inspection device according to claim 1, characterized in that: The freeze dryer-specific barrel air tightness inspection device further comprises an operation box, which is fixed on the column of the bracket.

4. The freeze dryer barrel air tightness inspection device according to claim 1, characterized in that: The lifting speed of the sealing disk driven by the cylinder output shaft is ≤100 mm / s.

5. The freeze dryer barrel air tightness inspection device according to claim 1, characterized in that: The diameter of the disc is greater than 125% or more of the outer diameter of the barrel to be inspected.

6. The freeze dryer barrel air tightness inspection device according to claim 1, characterized in that: The water tank is a rectangular water tank, and the height of the tank wall must meet the requirement that when the water level reaches two-thirds of the tank wall height, the water level can be 70 mm or more above the air path joint of the barrel to be inspected placed on the disc.

Images