Vacuumizing unit of vacuum damping machine

Abstract

The utility model relates to a vacuum-pumping unit of a vacuum damping machine, which comprises an air-cooled roots vacuum pump, the air-cooled roots vacuum pump is connected with an interstage cooler through a pipeline, the interstage cooler is connected with a check valve through a pipeline, and the outlet of the check valve is connected with a variable pitch dry screw vacuum pump through a pipeline. An air outlet of the variable-pitch dry type screw vacuum pump is connected with an exhaust silencer, and the lower end of the interstage cooler is connected with an automatic liquid drainage tank through a pipeline and a valve. According to the structure provided by the embodiment of the invention, the air-cooled roots vacuum pump and the variable-pitch dry-type screw vacuum pump are dry-type mechanical vacuum pumps, oil-free dry-type operation is carried out in a cavity, and the interstage cooler can remove water vapor in gas extracted by the air-cooled roots vacuum pump, so that most of the water vapor in the extracted gas is condensed in the interstage cooler, and the water vapor in the gas is condensed in the interstage cooler. And therefore, the pumping burden of the variable-pitch dry type screw vacuum pump is reduced, the stability of the vacuum degree can be ensured, and the operation cost is greatly saved.

Description

Technical Field

[0001] This application relates to the field of vacuum pumping unit technology, and in particular to a vacuum pumping unit for a vacuum dehumidifier. Background Technology

[0002] A vacuum dehumidifier is a type of mechanical equipment mainly used for the rehumidification of materials. Its working principle involves using a vacuum pump to draw air from the dehumidification chamber, achieving a predetermined vacuum level. Then, a humidification system mixes water vapor and water, introducing it into the chamber as low-pressure wet steam, which the material absorbs and softens. Currently, most vacuum chambers use screw vacuum pumps for their vacuuming systems. When connecting screw vacuum pumps to other devices, straight pipe connections are typically used. However, ordinary vacuum dehumidifiers do not adequately remove moisture from the air during operation, increasing the burden on the variable-pitch dry screw vacuum pump. Therefore, we propose a vacuum dehumidifier unit. Utility Model Content

[0003] This application provides a vacuum pumping unit for a vacuum dehumidifier to solve the problems mentioned above.

[0004] This application provides a vacuum pumping unit for a vacuum dehumidifier, comprising:

[0005] An air-cooled Roots vacuum pump is connected to an interstage cooler via a pipeline. The interstage cooler is connected to a check valve via a pipeline, and the outlet of the check valve is connected to a variable pitch dry screw vacuum pump via a pipeline. The outlet of the variable pitch dry screw vacuum pump is connected to an exhaust silencer. The lower end of the interstage cooler is connected to an automatic drain tank via a pipeline and a valve.

[0006] A baffle is fixedly connected to the lower end of the inner cavity of the interstage cooler. The upper end of the baffle is covered with a liquid-absorbing layer. A number of capillary strips are evenly arranged at the lower end of the liquid-absorbing layer, and the capillary strips penetrate the baffle.

[0007] A sealing partition is fixedly connected to the right side of the inner cavity of the interstage cooler. A first through hole is opened on the upper side of the sealing partition. A liquid suction shell is rotatably provided at the right end of the sealing partition. The liquid suction shell has four liquid suction chambers arranged in a ring array inside. Each liquid suction chamber has a liquid suction layer inside. The liquid suction shell has a second through hole symmetrically and evenly opened on the left and right end faces of the liquid suction chamber. A rubber sealing ring is embedded on the outside of the liquid suction chamber at the left end of the liquid suction shell.

[0008] Preferably, the left end of the liquid-absorbing housing is provided with a recessed groove at the left end of the liquid-absorbing cavity.

[0009] Preferably, the right end of the liquid-absorbing housing is fixedly connected to a connecting shaft, and the connecting shaft is rotatably mounted on the connecting frame via a bearing. The outer end of the connecting frame is fixedly connected to the inner side wall of the detachable housing, and the left end of the detachable housing is fixedly and sealed to the right end of the interstage cooler via bolts.

[0010] Preferably, a motor is fixedly connected to the end of the connecting shaft, and the motor is fixedly connected to the inner side wall of the detachable housing.

[0011] Preferably, the lower end of the inner cavity of the interstage cooler forms a water collection chamber at the lower end of the baffle, and the lower end of the water collection chamber is connected to an automatic drain tank through a pipe.

[0012] Preferably, the gas outlet of the interstage cooler is located on the right side of the liquid suction housing.

[0013] The technical solutions provided in this application have the following advantages compared with the prior art:

[0014] The structure provided in this application embodiment is a dry mechanical vacuum pump, which is an air-cooled Roots vacuum pump and a variable pitch dry screw vacuum pump. It operates in a dry state without oil in the cavity and does not require working fluid or steam. The interstage cooler can remove water vapor from the gas pumped by the air-cooled Roots vacuum pump, so that most of the water vapor in the pumped gas is condensed in the interstage cooler. This reduces the pumping load of the variable pitch dry screw vacuum pump, ensures stable vacuum, and greatly saves operating costs.

[0015] Furthermore, the liquid suction layer and capillary strips at the bottom of the interstage cooler can promptly discharge the water vapor that condenses inside the interstage cooler. At the same time, the liquid suction layer inside the right-side liquid suction shell can reabsorb the water vapor in the condensed gas, greatly increasing the dryness of the gas discharged from the interstage cooler. In addition, the motor will rotate every once in a while to replace different liquid suction layers, thereby ensuring the liquid suction degree of the liquid suction layer. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2This is a cross-sectional view of the interstage cooler of this utility model;

[0020] Figure 3 This is an enlarged view of the right side of the interstage cooler of this utility model;

[0021] Figure 4 This utility model Figure 2 Enlarged view of point A in the middle;

[0022] Figure 5 This utility model Figure 2 Enlarged view at point B in the middle;

[0023] Figure 6 This is a left view of the liquid-absorbing shell of this utility model.

[0024] In the diagram: 1. Air-cooled Roots vacuum pump; 2. Interstage cooler; 3. Check valve; 4. Variable pitch dry screw vacuum pump; 5. Exhaust silencer; 6. Baffle; 7. Liquid suction layer; 8. Motor; 9. Detachable housing; 10. Sealing partition; 11. Liquid suction housing; 12. Capillary strip; 13. Rubber sealing ring; 14. First through hole; 15. Recessed groove; 16. Liquid suction layer; 17. Second through hole; 18. Connecting frame; 19. Automatic drain tank. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] Various embodiments of this application may exist in the form of a range. It should be understood that the description in the form of a range is merely for convenience and brevity and should not be construed as a rigid limitation on the scope of this application. Therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single numerical values ​​within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single numbers within the range, such as 1, 2, 3, 4, 5, and 6, regardless of the range. In addition, whenever a numerical range is indicated in this application, it means including any referenced number (fraction or integer) within the indicated range. Unless otherwise specified, all raw materials, reagents, instruments, and equipment used in this application can be purchased commercially or prepared using existing equipment.

[0027] In this application, unless otherwise stated, directional terms such as "upper" and "lower" specifically refer to the drawing directions in the accompanying drawings. Furthermore, in this application, the terms "comprising," "including," etc., mean "including but not limited to." In this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In this application, "and / or" describes the relationship between related objects, indicating that three relationships may exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. A and B can be singular or plural. In this application, "at least one" means one or more, and "more than one" means two or more. "At least one," "at least one of the following," or similar expressions refer to any combination of these items, including any combination of a single item or a plural item. For example, "at least one of a, b, or c", or "at least one of a, b, and c", can both mean: a, b, c, ab, i.e., a and b, ac, bc, or abc, where a, b, and c can be a single or multiple.

[0028] like Figures 1-6 As shown in the figure, this application embodiment provides a vacuum pumping unit for a vacuum dehumidifier, comprising:

[0029] An air-cooled Roots vacuum pump 1 is connected to an interstage cooler 2 via a pipeline. The interstage cooler 2 is connected to a check valve 3 via a pipeline, and the outlet of the check valve 3 is connected to a variable pitch dry screw vacuum pump 4 via a pipeline. The outlet of the variable pitch dry screw vacuum pump 4 is connected to an exhaust silencer 5. The lower end of the interstage cooler 2 is connected to an automatic drain tank 19 via a pipeline and a valve.

[0030] The lower end of the inner cavity of the interstage cooler 2 is fixedly connected to a baffle 6, the upper end of the baffle 6 is covered with a liquid-absorbing layer 7, and the lower end of the liquid-absorbing layer 7 is uniformly provided with a plurality of capillary strips 12, and the capillary strips 12 penetrate the baffle 6.

[0031] A sealing partition 10 is fixedly connected to the right side of the inner cavity of the interstage cooler 2. A first through hole 14 is opened on the upper side of the sealing partition 10. A liquid suction shell 11 is rotatably provided on the right end of the sealing partition 10. The liquid suction shell 11 has four liquid suction chambers arranged in a ring array inside. Each liquid suction chamber is provided with a liquid suction layer 16. The liquid suction shell 11 has second through holes 17 symmetrically and evenly opened on the left and right end faces of the liquid suction chambers. A rubber sealing ring 13 is embedded on the outside of the liquid suction chamber at the left end of the liquid suction shell 11.

[0032] Specifically: the air-cooled Roots vacuum pump 1, check valve 3, variable pitch dry screw vacuum pump 4, and exhaust silencer 5 all use existing equipment.

[0033] like Figure 3 and Figure 5 As shown: The left end of the liquid suction housing 11 is provided with a recessed groove 15 at the left end of the liquid suction cavity.

[0034] Specifically, the recessed groove 15 can act as a buffer. The gas in the interstage cooler 2 enters the recessed groove 15 after passing through the first through hole 14, and then enters the liquid absorption layer 16 through the second through hole 17, thereby preventing the side wall of the liquid absorption shell 11 from blocking the gas from entering the interior of the liquid absorption layer 16.

[0035] like Figure 3 As shown: The right end of the liquid absorption housing 11 is fixedly connected to a connecting shaft, and the connecting shaft is rotatably mounted on the connecting frame 18 through a bearing. The outer end of the connecting frame 18 is fixedly connected to the inner side wall of the detachable housing 9, and the left end of the detachable housing 9 is fixedly and sealed to the right end of the interstage cooler 2 by bolts.

[0036] Specifically, the connecting bracket 18 makes the rotation of the liquid suction housing 11 more stable.

[0037] like Figure 3 As shown: A motor 8 is fixedly connected to the end of the connecting shaft, and the motor 8 is fixedly connected to the inner wall of the detachable housing 9.

[0038] Specifically: Motor 8 is a commercially available motor, and motor 8 drives the liquid suction housing 11 to rotate.

[0039] like Figure 1 As shown: The lower end of the inner cavity of the interstage cooler 2 forms a water collection chamber at the lower end of the baffle 6, and the lower end of the water collection chamber is connected to the automatic drain tank 19 through a pipe.

[0040] Specifically: the automatic drain tank 19 adopts a drain tank that is already available on the market.

[0041] like Figure 3 As shown: The gas outlet of the interstage cooler 2 is located on the right side of the liquid suction housing 11.

[0042] Specifically: the gas processed inside the interstage cooler 2 will pass through the liquid absorption layer 16 to remove water vapor again.

[0043] Operating principle: During operation, both the air-cooled Roots vacuum pump 1 and the variable pitch dry screw vacuum pump 4 are dry mechanical vacuum pumps, operating without oil in their chambers. They require no working fluid or steam, significantly reducing operating costs. Furthermore, the interstage cooler removes water vapor from the gas pumped by the air-cooled Roots vacuum pump, allowing most of the water vapor in the pumped gas to condense within the interstage cooler 2. This reduces the pumping load on the variable pitch dry screw vacuum pump 4 and increases the pumping capacity of non-condensable gases. Additionally, an automatic drain tank 19 is installed at the drain point of the interstage cooler 2, allowing for automatic drainage based on the amount of condensate, eliminating the need for manual operation. The check valve 3 prevents gas backflow during the shutdown and rehumidification process, thus preventing damage to the vacuum level and affecting the rehumidification effect.

[0044] Furthermore, the liquid-absorbing layer 7 and capillary strip 12 at the bottom of the interstage cooler 2 can promptly discharge the water vapor that condenses inside the interstage cooler 2. At the same time, the liquid-absorbing layer 16 inside the liquid-absorbing shell 11 on the right side can reabsorb the water vapor in the condensed gas, thereby greatly increasing the dryness of the gas discharged from the interstage cooler 2. In addition, the motor 8 will rotate 90 degrees every once in a while to replace different liquid-absorbing layers 16, thereby ensuring the liquid absorption of the liquid-absorbing layer 16.

[0045] Meanwhile, the liquid-absorbing housing 11 can be disassembled along with the detachable housing 9 to replace the liquid-absorbing layer 16.

[0046] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed in this application.

Claims

1. A vacuum pumping unit for a vacuum dehumidifier, characterized in that, include: An air-cooled Roots vacuum pump (1) is connected to an interstage cooler (2) via a pipeline. The interstage cooler (2) is connected to a check valve (3) via a pipeline. The outlet of the check valve (3) is connected to a variable pitch dry screw vacuum pump (4) via a pipeline. The outlet of the variable pitch dry screw vacuum pump (4) is connected to an exhaust silencer (5). The lower end of the interstage cooler (2) is connected to an automatic drain tank (19) via a pipeline and a valve. The lower end of the inner cavity of the interstage cooler (2) is fixedly connected to a baffle (6), the upper end of the baffle (6) is covered with a liquid-absorbing layer (7), and the lower end of the liquid-absorbing layer (7) is uniformly provided with a number of capillary strips (12), and the capillary strips (12) penetrate the baffle (6). A sealing partition (10) is fixedly connected to the right side of the inner cavity of the interstage cooler (2). A first through hole (14) is opened on the upper side of the sealing partition (10). A liquid-absorbing shell (11) is rotatably provided on the right end of the sealing partition (10). The liquid-absorbing shell (11) has four liquid-absorbing chambers arranged in a ring array inside. Each liquid-absorbing chamber has a liquid-absorbing layer (16). The liquid-absorbing shell (11) has a second through hole (17) symmetrically and evenly opened on the left and right end faces of the liquid-absorbing chambers. A rubber sealing ring (13) is embedded on the outside of the liquid-absorbing chamber at the left end of the liquid-absorbing shell (11).

2. The vacuum pumping unit of a vacuum dehumidifier according to claim 1, characterized in that: The left end of the liquid-absorbing housing (11) is provided with a recessed groove (15) at the left end of the liquid-absorbing cavity.

3. The vacuum pumping unit of a vacuum dehumidifier according to claim 1, characterized in that: The right end of the liquid-absorbing housing (11) is fixedly connected to a connecting shaft, and the connecting shaft is rotatably mounted on the connecting frame (18) through a bearing. The outer end of the connecting frame (18) is fixedly connected to the inner side wall of the detachable housing (9), and the left end of the detachable housing (9) is fixedly and sealed to the right end of the interstage cooler (2) by bolts.

4. The vacuum pumping unit of a vacuum dehumidifier according to claim 3, characterized in that: A motor (8) is fixedly connected to the end of the connecting shaft, and the motor (8) is fixedly connected to the inner wall of the detachable housing (9).

5. The vacuum pumping unit of a vacuum dehumidifier according to claim 1, characterized in that: The lower end of the inner cavity of the interstage cooler (2) forms a water collection chamber at the lower end of the baffle (6), and the lower end of the water collection chamber is connected to the automatic drain tank (19) through a pipe.

6. The vacuum pumping unit of a vacuum dehumidifier according to claim 1, characterized in that: The gas outlet of the interstage cooler (2) is located on the right side of the liquid suction housing (11).

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