Pressure balance valve for food vacuum freeze drying equipment

Abstract

The utility model belongs to the technical field of pressure balance valves, and particularly relates to a pressure balance valve for food vacuum freeze drying equipment, which comprises a shell, the upper end of the shell is connected with an upper flange through a screw, the top of the inner side of the shell is fixedly connected with an upper rib plate, and one end, far away from the shell, of the upper rib plate is fixedly connected with an upper sleeve. The interior of the upper sleeve is slidably connected with an upper movable guide rod, and the upper end of the upper movable guide rod is connected with an upper pressing plate through a screw. The lower movable guide rod is matched with the fourth sealing gasket, and the upper movable guide rod, the upper pressing plate and the counterweight flange are matched, so that the vacuum container can work normally within a set vacuum value range, high-pressure gas is discharged in time when a pressure-bearing tube bundle in the vacuum container leaks, safety protection is performed on the vacuum container, and the service life of the vacuum container is prolonged. And when the vacuum degree of the vacuum container is higher than a set vacuum value, external air can be introduced into the container, so that the safety of the vacuum container is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure balancing valves, in particular to a pressure balancing valve for food vacuum freeze drying equipment. Background Art

[0002] The main drying chamber in the existing large-scale food vacuum freeze-drying equipment is a vacuum volume with a pressure-bearing pipe inside. Food is dried in a sealed vacuum container at a set vacuum value. When the vacuum value in the container is higher than the design value of the vacuum container, the container will collapse and cause economic losses; when the pressure-bearing pipe in the vacuum container leaks, the pressure value caused by the leakage is higher than the design value of the vacuum container, and the container will be damaged, causing personnel and economic losses. Utility Model Content

[0003] The utility model aims to provide a pressure balancing valve for food vacuum freeze drying equipment, which solves the above problems existing in the prior art.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pressure balancing valve for food vacuum freeze-drying equipment, comprising a shell, the upper end of the shell is connected to an upper flange by screws, the inner top of the shell is fixedly connected to an upper rib plate, the end of the upper rib plate away from the shell is fixedly connected to an upper sleeve, the upper sleeve is internally slidably connected to an upper movable guide rod, the upper end of the upper movable guide rod is connected to an upper pressure plate by screws, the upper end of the upper pressure plate is connected to a counterweight flange by screws, the lower end of the upper pressure plate is bonded to a first sealing gasket, the lower end of the shell is connected to a lower flange by screws, the lower end of the lower flange is welded to a lower rib plate, the end of the lower rib plate away from the lower flange is fixedly connected to a lower sleeve, and the lower sleeve is internally slidably connected to a lower movable guide rod.

[0005] Preferably, the lower end of the upper flange contacts with a second sealing gasket, and the second sealing gasket contacts with the housing. By providing the second sealing gasket, the sealing between the upper flange and the housing is increased.

[0006] Preferably, the first sealing gasket is slidably connected to the upper movable guide rod, and the first sealing gasket is in contact with the upper flange. By providing the first sealing gasket, the sealing performance between the upper flange and the upper pressing plate is increased.

[0007] Preferably, the upper end of the lower flange is in contact with a third sealing gasket, and the third sealing gasket is in contact with the housing. By providing the third sealing gasket, the sealing performance between the lower flange and the housing is increased.

[0008] Preferably, a fourth sealing pad is slidably connected to the outer side of the lower movable guide rod, and the fourth sealing pad is in contact with the lower flange. By providing the fourth sealing pad, the sealing performance between the lower movable guide rod and the lower flange is increased.

[0009] Preferably, an end cover is provided at the rear end of the shell, and an opening is provided in the middle of the end cover. By providing the end cover, the end of the shell is blocked.

[0010] The beneficial effects of the utility model are as follows: the utility model can ensure that the vacuum container works normally within the set vacuum value range through the cooperation of the lower movable guide rod and the fourth sealing gasket, the upper movable guide rod, the upper pressure plate and the counterweight flange, and ensure that the high-pressure gas is discharged in time when the pressure-bearing tube bundle in the vacuum container leaks, so as to provide safety protection for the vacuum container; and can also introduce external air into the container when the vacuum degree of the vacuum container is higher than the set vacuum value, so as to provide safety protection for the vacuum container. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0012] Figure 2 For this utility model Figure 1 Left side sectional view of

[0013] Figure 3 For this utility model Figure 1 Top view of the .

[0014] In the figure: 1. counterweight flange; 2. upper pressure plate; 3. first sealing gasket; 4. upper flange; 5. second sealing gasket; 6. shell; 7. upper movable guide rod; 8. lower movable guide rod; 9. third sealing gasket; 10. lower flange; 11. fourth sealing gasket; 12. lower sleeve; 13. lower rib plate; 14. upper sleeve; 15. upper rib plate; 16. end cover. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-Figure 3, a pressure balancing valve for food vacuum freeze-drying equipment, including a shell 6, the upper end of the shell 6 is connected with an upper flange 4 by screws, the lower end of the upper flange 4 is in contact with a second sealing gasket 5, the second sealing gasket 5 is in contact with the shell 6, and the second sealing gasket 5 is provided to increase the sealing performance between the upper flange 4 and the shell 6, an upper rib plate 15 is fixedly connected to the inner top of the shell 6, an upper rib plate 15 is fixedly connected to the end away from the shell 6 by the upper sleeve 14, an upper movable guide rod 7 is slidably connected to the interior of the upper sleeve 14, the upper end of the upper movable guide rod 7 is connected with an upper pressure plate 2 by screws, the upper end of the upper pressure plate 2 is connected with a counterweight flange 1 by screws, a first sealing gasket 3 is bonded to the lower end of the upper pressure plate 2, the first sealing gasket 3 is slidably connected to the upper movable guide rod 7, the first sealing gasket 3 is in contact with the upper flange 4, and the first sealing gasket 3 is provided to increase the sealing performance between the upper flange 4 and the upper pressure plate 2.

[0017] See also Figure 1-Figure 3 The lower end of the shell 6 is connected to a lower flange 10 by screws, and the upper end of the lower flange 10 is in contact with a third sealing gasket 9. The third sealing gasket 9 is in contact with the shell 6. By setting the third sealing gasket 9, the sealing between the lower flange 10 and the shell 6 is increased. A lower rib plate 13 is welded to the lower end of the lower flange 10, and the end of the lower rib plate 13 away from the lower flange 10 is fixedly connected to a lower sleeve 12. The lower sleeve 12 is slidably connected to the inside of the lower sleeve 12, and the outer side of the lower movable guide rod 8 is slidably connected to the fourth sealing gasket 11. The fourth sealing gasket 11 is in contact with the lower flange 10. By setting the fourth sealing gasket 11, the sealing between the lower movable guide rod 8 and the lower flange 10 is increased. An end cover 16 is provided at the rear end of the shell 6, and an opening is opened in the middle of the end cover 16. By setting the end cover 16, the end of the shell 6 is blocked.

[0018] The specific implementation process of the utility model is as follows: when the pressure-bearing tube bundle in the vacuum volume leaks, the leaked gas enters the shell 6 through the end cover 16 connected to the vacuum container and the balancing valve, causing the pressure in the shell 6 to increase. When the high-pressure gas pressure increases to a certain value, it overcomes the weight of the upper movable guide rod 7, the upper pressure plate 2 and the counterweight flange 1, thereby driving the upper movable guide rod 7, the upper pressure plate 2 and the counterweight flange 1 to move upward, so that a gap is generated between the upper movable guide rod 7, the upper pressure plate 2 and the counterweight flange 1 and the balancing valve shell 6, so as to discharge the high-pressure gas to the outside of the vacuum container. The pressure value of the high-pressure gas can be ensured by adjusting the weight of the counterweight flange 1, thereby protecting the safety of the vacuum volume and avoiding unnecessary economic losses. When the interior of the vacuum volume is in a vacuum state, the vacuum container makes the interior of the balancing valve in a vacuum state through the end cover 16 connected to the balancing valve, and the lower movable guide rod 8 passes through the fourth The sealing gasket 11 forms a sealing system. When the vacuum degree in the container is higher than the set vacuum value range, the lower movable guide rod 8 overcomes its own weight and moves upward under the vacuum state, so that a gap is generated between the lower movable guide rod 8 and the balancing valve housing 6, so that external gas can enter the vacuum container. The vacuum value inside the housing 6 can be ensured by adjusting the weight of the lower movable guide rod 8. When the vacuum degree of the vacuum container reaches the set vacuum value range due to external air entering the system, the lower movable guide rod 8 overcomes the resistance in the container by its own weight and moves downward. The lower movable guide rod 8 and the fourth sealing gasket 11 are sealed by the weight of the lower movable guide rod 8, so that the vacuum container can work normally within the set vacuum value range, thereby protecting the vacuum value of the vacuum volume during the working process and avoiding unnecessary economic losses such as container collapse due to excessive vacuum.

[0019] Although embodiments of the present invention have been shown and described, it will be appreciated 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 that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure balancing valve for food vacuum freeze-drying equipment, comprising a housing (6), characterized in that: The upper end of the shell (6) is connected to an upper flange (4) by screws, and an upper rib plate (15) is fixedly connected to the inner top of the shell (6). The end of the upper rib plate (15) away from the shell (6) is fixedly connected to an upper sleeve (14), and the interior of the upper sleeve (14) is slidably connected to an upper movable guide rod (7). The upper end of the upper movable guide rod (7) is connected to an upper pressure plate (2) by screws, and the upper end of the upper pressure plate (2) is connected to a counterweight flange (1) by screws. The lower end of the upper pressure plate (2) is bonded with a first sealing gasket (3), and the lower end of the shell (6) is connected to a lower flange (10) by screws. The lower end of the lower flange (10) is welded with a lower rib plate (13), and the end of the lower rib plate (13) away from the lower flange (10) is fixedly connected to a lower sleeve (12), and the interior of the lower sleeve (12) is slidably connected to a lower movable guide rod (8).

2. A pressure balancing valve for food vacuum freeze-drying equipment according to claim 1, characterized in that: The lower end of the upper flange (4) contacts a second sealing gasket (5), and the second sealing gasket (5) contacts a housing (6).

3. The pressure balancing valve for food vacuum freeze-drying equipment according to claim 1, characterized in that: The first sealing gasket (3) is slidably connected to the upper movable guide rod (7), and the first sealing gasket (3) is in contact with the upper flange (4).

4. The pressure balancing valve for food vacuum freeze-drying equipment according to claim 1, characterized in that: The upper end of the lower flange (10) contacts a third sealing gasket (9), and the third sealing gasket (9) contacts the housing (6).

5. The pressure balancing valve for food vacuum freeze-drying equipment according to claim 1, characterized in that: A fourth sealing gasket (11) is slidably connected to the outer side of the lower movable guide rod (8), and the fourth sealing gasket (11) is in contact with the lower flange (10).

6. The pressure balancing valve for food vacuum freeze-drying equipment according to claim 1, characterized in that: An end cover (16) is provided at the rear end of the shell (6), and an opening is provided in the middle of the end cover (16).

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