Automatic sealing and uncovering device for large vacuum box body

Abstract

The utility model relates to an automatic sealing and uncovering device for a large vacuum box body, which is characterized in that two translation guide rails of the device are respectively positioned below two sides of an upper sealing cover, and are respectively provided with a sliding block which forms a sliding pair with the translation guide rails; lifting transmission units are installed near the four corners of the upper sealing cover respectively, the output ends of the lifting transmission units extend downwards to form vertical worms, the bottom ends of the vertical worms are connected with the top of a supporting block with an inverted-T-shaped section, and the supporting block is installed in a hollow structure fixing block fixed to a sliding block to form a vertical moving pair. The upper portion of the supporting block is matched with an open hole in the top of the fixing block, so that the vertical worm extends out of the open hole. The middles of the two ends of the sliding block are connected with chains surrounding chain wheels at the two ends of the translation guide rail. The lifting transmission unit is in transmission connection with the lifting motor, and a chain wheel and a belt guide wheel at one end of the translation guide rail are coaxially installed on a driving shaft which is in transmission connection with the translation motor. The utility model not only has high efficiency and saves space, but also properly solves the problem that the sealing ring is extruded by vacuum pressure.

Description

Technical Field

[0001] The utility model relates to a sealing and opening device, in particular to an automatic sealing and opening device for a large vacuum box, belonging to the technical field of vacuum sealing. Background Art

[0002] According to the applicant's understanding, the vacuum box in the prior art opens the can lid through a hydraulic lid opening device or a rotary lid opening device. Since the top can lid of a large vacuum box is heavy and large in size, not only is the lid opening efficiency low, but it also occupies a large space after opening, and is prone to overheight or interference with adjacent equipment, and occupies a large space.

[0003] Furthermore, the pressure generated by the vacuum container will squeeze the sealing ring, causing the upper sealing cover to continue to move downward. In order to avoid this situation, the prior art usually uses a hydraulic or pneumatic device to completely press the upper cover plate against the sealing ring before vacuuming. However, due to the large outer diameter and wire diameter of the sealing ring of a large vacuum box, it is necessary to increase the thrust of the hydraulic or pneumatic device, resulting in a complicated device and reduced reliability. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of the above-mentioned technology and to provide an automatic sealing and opening device for a large vacuum box, which is convenient to open and close, saves space and properly solves the problem of vacuum pressure squeezing the sealing ring.

[0005] In order to achieve the above-mentioned purpose, the basic technical scheme of the automatic sealing and opening device for large vacuum boxes of the utility model is: comprising two translation guide rails, the two translation guide rails are respectively located below the two sides of the upper sealing cover and are respectively equipped with sliders forming a moving pair therewith;

[0006] A lifting transmission unit is installed near the four corners of the upper sealing cover, and a vertical worm is extended downward from the output end of the lifting transmission unit. The bottom end of the vertical worm is connected to the top of the support block with an inverted T-shaped cross section. The support block is installed in a hollow structure fixed block fixed on the slider to form a vertical moving pair;

[0007] The upper portion of the support block is adapted to the opening at the top of the fixed block so that the vertical worm extends out of the opening;

[0008] The middle parts of both ends of the slider are respectively connected to chains surrounding the sprockets at both ends of the translation guide rail;

[0009] The lifting transmission unit is in driving connection with the lifting motor, the sprocket at one end of the translation guide rail is coaxially installed on the driving shaft, and the driving shaft is in driving connection with the translation motor.

[0010] Compared with the prior art, the utility model has high efficiency and saves space when opening the cover by translation and lifting, and especially properly solves the problem of vacuum pressure squeezing the sealing ring.

[0011] A further improvement of the utility model is that the sliding block is supported on roller needles which are distributed at intervals in the translation guide rail and supported on the rail.

[0012] A further improvement of the utility model is that: the upper surfaces at both ends of the sliding block are respectively connected to the protective steel belts surrounding the guide pulleys at both ends of the translation guide rail, and the sprocket and the guide pulley are coaxially installed on the driving shaft.

[0013] A further improvement of the utility model is that the lifting transmission unit on the same side is connected to the lifting motor located between the two translation guide rails through an angle transmission block with a pair of bevel gears installed therein after the shaft is connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings.

[0015] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model.

[0016] Figure 2 for Figure 1 The embodiment does not include a top view of the translation rail.

[0017] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the translation guide rail of the embodiment.

[0018] Figure 4 for Figure 1 A schematic diagram of the three-dimensional structure of the translation guide rail transmission mechanism of an embodiment.

[0019] Figure 5 for Figure 1 Schematic diagram of the partial three-dimensional structure of the translation guide rail of the embodiment.

[0020] Figure 6 for Figure 1 Schematic diagram comparing the upper sealing surface in the high position and the lower position when the embodiment is opened and closed.

[0021] In the figure: 10. translation guide rail; 20. lifting transmission mechanism; 30. upper sealing cover; 40. sealing ring; 50. lower sealing flange; 60. translation motor; 101. protective steel belt; 102. chain; 103. needle roller; 104. slider; 105. track; 106 double-row sprocket; 107. guide pulley; 108. driving shaft; 201. angle transmission; 202. lifting transmission unit; 203. lifting motor; 204. support block; 205. fixing block. DETAILED DESCRIPTION Example

[0022] This embodiment is used for the automatic sealing and opening device of large vacuum boxes. Figures 1 to 5 As shown, the translation guide rails 10 located below the two sides of the upper sealing cover 30 are respectively provided with sliders 104 constituting a moving pair therewith. The lifting transmission units 202 consisting of worm gear pairs are respectively provided near the four corners of the upper sealing cover 30, and the output end thereof extends downwardly to form a vertical worm, and the bottom end of the vertical worm is connected to the top of the inverted T-shaped cross-section support block 204, and the support block 204 is installed in a hollow structure fixed block 205 fixed on the slider 104, forming a vertical moving pair. The upper part of the support block 204 can extend into the top opening of the fixed block 205, so that the vertical worm extends out from the top opening.

[0023] The slider 104 is supported on rollers 103 supported on the track 105 at intervals in the translation guide rail 10. The middle parts of the two ends of the slider 104 are respectively connected to the chains 102 of the double-row sprockets 106 at both ends of the translation guide rail 10. The upper surfaces of the two ends of the slider 104 are respectively connected to the protective steel belts 101 of the guide pulleys 107 at both ends of the translation guide rail 10 for dust prevention and chain protection.

[0024] The lifting transmission unit 202 on the same side of the upper sealing cover 30 is connected to the lifting motor 203 located between the two translation guide rails 10 through an angle transmission block with a pair of bevel gears installed inside. Therefore, since the lifting motor 203 is connected to the two switching machines 201 through a transmission shaft, the rotational power from the lifting motor 203 is changed in direction by the switching machine 201 and provided to the four lifting transmission units 202 respectively fixed at the four corners of the upper sealing cover 30 through the transmission shaft, thereby realizing the up and down movement of the worm of the lifting transmission unit 202, so that the vertical worms at various locations synchronously drive the upper sealing cover 30 to rise and fall as needed.

[0025] The double-row sprocket 106 and the guide pulley 107 at one end of the translation guide rail 10 are coaxially mounted on the driving shaft 108. The driving shafts 108 of the two translation guide rails 10 are coupled and driven by the translation motor 60 located between the two translation guide rails 10, so that the upper sealing cover 30 supported by each slider 104 of the two translation guide rails 10 can be smoothly horizontally displaced as required.

[0026] When working, the automatic sealing and opening device of this embodiment operates as follows:

[0027] In the first step, after the vacuum box is emptied, when the upper sealing cover 30 needs to be opened, the lifting motor 203 rotates forward, and the power passes through the transmission shaft and the lifting transmission unit 202, such as Figure 6 As shown on the left side, the bottom support block 204 of the lifting transmission unit is lowered onto the guide rail slider 104, and the lifting motor 203 continues to rotate to support the upper sealing cover 30 to be lifted to the desired high position;

[0028] Step 2: When the upper sealing cover 30 rises to the high position, the translation motor 60 drives the translation guide rail 10 to move the upper sealing cover 30 to the cover opening position;

[0029] Step 3: When the translation guide rail 10 needs to be closed, the translation motor 60 reverses and drives the translation guide rail 10 to move the upper sealing cover 30 to the closed cover position;

[0030] Step 4: When the upper sealing cover 30 reaches the closed position, the lifting motor 203 is reversed to lower the upper sealing cover 30 to the sealing surface P (i.e. Figure 1 After the lower sealing flange 50 of the embedded sealing ring 40 is installed, the lifting transmission unit 202 continues to operate, and its bottom support block 204 rises, leaving a certain gap between it and the guide rail slider 104, completing Figure 6 The pre-sealing of the upper sealing cover 30 shown on the right side can prevent the pressure generated by the vacuum from squeezing the sealing ring 40, and avoid the upper sealing cover 30 continuing to move downward and causing the pressure to directly act on the guide rail 105 and cause damage to the mechanism;

[0031] Step 5: After the pre-sealing is completed, the vacuum box is evacuated, and the pressure generated by the vacuum squeezes the sealing ring 40, so that the upper sealing cover 30 continues to move downward, thereby completing the sealing of the vacuum box.

[0032] A further improvement of this embodiment is that the lifting motor 203 and the translation motor 60 are respectively controlled by an automatic control system, thereby achieving precise automatic operation of the entire device.

[0033] In addition to the above embodiments, the present invention may also have other implementation modes, and the technical solutions formed by equivalent transformations all fall within the protection scope required by the present invention.

Claims

1. An automatic sealing and opening device for a large vacuum box, characterized in that: It comprises two translation guide rails, which are respectively located below the two sides of the upper sealing cover and are respectively provided with sliders forming a moving pair therewith; A lifting transmission unit is installed near the four corners of the upper sealing cover, and a vertical worm is extended downward from the output end of the lifting transmission unit. The bottom end of the vertical worm is connected to the top of the support block with an inverted T-shaped cross section. The support block is installed in a hollow structure fixed block fixed on the slider to form a vertical moving pair; The upper portion of the support block is adapted to the opening at the top of the fixed block so that the vertical worm extends out of the opening; The middle parts of both ends of the slider are respectively connected to chains surrounding the sprockets at both ends of the translation guide rail; The lifting transmission unit is in driving connection with the lifting motor, the sprocket at one end of the translation guide rail is coaxially installed on the driving shaft, and the driving shaft is in driving connection with the translation motor.

2. The automatic sealing and opening device for a large vacuum box according to claim 1, characterized in that: The slide block is supported on roller needles which are distributed at intervals and supported on the track in the translation guide rail.

3. The automatic sealing and opening device for a large vacuum box according to claim 2, characterized in that: The upper surfaces at both ends of the sliding block are respectively connected to the protective steel belts surrounding the guide pulleys at both ends of the translation guide rail, and the sprocket and the guide pulley are coaxially installed on the driving shaft.

4. The automatic sealing and opening device for a large vacuum box according to claim 3, characterized in that: The lifting transmission unit on the same side is connected to the lifting motor located between the two translation guide rails through an angle transmission block with a pair of bevel gears installed therein.

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