Roots water ring vacuum unit
By designing a Roots water ring vacuum unit including a two-stage water ring pump, a small Roots pump, a large Roots pump and a cooling component, the problem of low vacuum degree when the Roots pump and water ring pump are combined is solved and achieved It improves the output of vacuum salt production and saves electricity.
Patent Information
- Application Number
- CN202421230174.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-31
AI Technical Summary
When the existing Roots pump is combined with a water ring pump, the scope of application is limited, and the limit vacuum may be lower, resulting in a low output of vacuum salt production when the vacuum degree is lower than -88kpa in summer.
A Roots water ring vacuum unit is designed, including a two-stage water ring pump, a small Roots pump, a large Roots pump and a cooling assembly. Through the series use of the large Roots pump and the small Roots pump and the cooperation of the cooling assembly, Adjust the vacuum degree and effective temperature difference to ensure the stability of vacuum salt production output.
By increasing the vacuum degree and effective temperature difference, the output of vacuum salt production is increased, and on the premise of ensuring output, electric energy is saved and the economy of the salt production process is improved.
Smart Images
Figure CN222376706U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vacuum pump equipment, in particular to a Roots water ring vacuum unit. Background Art
[0002] Roots water ring vacuum unit is a common vacuum pumping equipment, which is often used to extract gas from closed containers. It is mainly composed of Roots vacuum pump and water ring pump. By combining the two, a certain degree of vacuum can be formed. Usually, the water ring pump is used as a fore pump to initially pump out gas and reduce the pressure of the system to an intermediate vacuum degree. Then, the gas is sent to the Roots pump for further pumping to achieve a higher vacuum degree.
[0003] The vacuum salt making process is a modern salt making method currently widely used. The brine is evaporated in a group of evaporation tanks under different "vacuum" states. Due to the pressure drop difference between the tanks, the boiling point is gradually reduced, so that the heat is transferred in sequence, and the "secondary steam" can be used multiple times. It is a modern salt production method. The output of multi-effect vacuum evaporation salt is proportional to the effective temperature difference. The effective temperature difference is determined by the difference between the temperature of the first-effect secondary steam and the temperature of the last-effect secondary steam. When the pressure of the first-effect steam is constant, the lower the temperature of the last-effect secondary steam, the greater the effective temperature difference. The temperature of the last-effect secondary steam is determined by the cooling system. The higher the vacuum degree, the lower the temperature of the last-effect secondary steam. On the other hand, reducing the vacuum degree of the last effect is very significant in increasing the effective temperature difference. For example, if the vacuum degree is increased from -88kpa to -95kpa, the temperature difference increases by 8℃, the effective temperature difference will increase by 3℃, and the output will increase by about 20%.
[0004] At present, vacuum units consisting of a single water ring pump and a single Roots pump in series are commonly used in the vacuum salt production industry. Since the ultimate vacuum degree of a Roots pump is limited, when the Roots pump and the water ring pump are combined, the scope of application is limited, and the ultimate vacuum degree of the entire vacuum unit may be lower. When the vacuum degree is lower than -88kpa in summer, the output of vacuum salt production is low.
[0005] For this purpose, we propose a Roots water ring vacuum unit. Utility Model Content
[0006] The purpose of the utility model is to provide a Roots water ring vacuum unit to solve the problem raised in the above background technology that when the Roots pump and the water ring pump are combined for operation, the application scope is limited and the ultimate vacuum degree of the entire vacuum unit may be lower. When the vacuum degree is lower than -88kpa in summer, the output of vacuum salt production is low.
[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0008] A Roots water ring vacuum unit comprises a base plate, a two-stage water ring pump, a small Roots pump, a large Roots pump and a cooling assembly, wherein the two-stage water ring pump, the small Roots pump, the large Roots pump and the cooling assembly are all mounted on the surface of the base plate through a stainless steel bracket, a water outlet of the two-stage water ring pump is connected to a gas-liquid separator, an end of the gas-liquid separator is connected to a water inlet of the small Roots pump, a branch pipe is connected to the periphery of the gas-liquid separator, the water outlet of the small Roots pump is connected to a first connecting pipe, the first connecting pipe is connected to the water inlet of the large Roots pump through a second connecting pipe, and an end of the branch pipe is connected to the second connecting pipe.
[0009] Among them, there is a difference in power between the large Roots pump and the small Roots pump. With the relay of the two Roots pumps, the vacuum degree is improved, and they can be switched according to the working conditions to ensure the vacuum salt production output while meeting the production requirements.
[0010] Preferably, the cooling assembly includes a cooling box, which is installed on the surface of the bottom plate, and a box cover is attached to the top of the cooling box, a partition is installed on the inner bottom surface of the cooling box, a strip inserted into the top of the partition is fixed to the bottom of the box cover, a refrigerator is installed on the inner bottom surface of the cooling box, a water pump is installed on the outer wall of the cooling box, and a three-way valve is installed at the water outlet of the water pump, and water distribution pipes are connected to both air outlets of the three-way valve.
[0011] Preferably, soft connecting pipes are installed between the end of the gas-liquid separator and the water inlet of the small Roots pump, between the first connecting pipe and the second connecting pipe, and between the second connecting pipe and the water inlet of the large Roots pump.
[0012] The soft connecting pipe can prevent the vibration of the entire system pipeline caused by equipment vibration, which may cause equipment damage and pipeline rupture.
[0013] Preferably, the two-stage water ring pump is provided with symmetrically arranged input pipes, and each of the input pipes is provided with a control valve.
[0014] Preferably, an exhaust pipe is installed on the gas-liquid separator, and a pressure relief valve is installed on the exhaust pipe.
[0015] Preferably, a first one-way valve is installed on the branch pipe, and a second one-way valve is installed on the second connecting pipe.
[0016] Preferably, the cooling box side wall is constructed with a heat dissipation groove, and the cooling box side wall is connected to a water pipe that passes through the partition.
[0017] Compared with the prior art, the beneficial effects of the utility model are:
[0018] 1. The utility model is provided with a cooling component. When in use, the high-temperature gas is conveyed into the cooling box, and the high-temperature gas in the cooling box is cooled by the refrigerator. When the temperature drops to a specified value, the vacuum unit is started to evacuate the cooled gas, which can change the temperature of the gas entering the small Roots pump and the large Roots pump, thereby increasing the effective temperature difference and improving the output of vacuum salt production.
[0019] 2. The utility model provides a two-stage water ring pump, a large Roots pump and a small Roots pump. When the effective temperature difference is greatly affected by the temperature in summer, the large Roots pump and the small Roots pump can be used in series to reduce the final vacuum degree, thereby ensuring the vacuum salt production output by adjusting the effective temperature difference value. In addition, during the salt production process, the large Roots pump and the small Roots pump can be flexibly switched according to the salt production conditions to work at the minimum working power under the premise of ensuring the vacuum salt production output, thereby effectively saving electricity and improving the economy of vacuum salt production. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0021] Figure 2 For this utility model Figure 1 A magnified schematic diagram of the structure at center A;
[0022] Figure 3 It is a schematic diagram of the structure of the cooling box of the utility model;
[0023] Figure 4 It is a cross-sectional view of the cooling box of the present utility model.
[0024] In the figure: 1, bottom plate; 2, two-stage water ring pump; 21, input pipe; 22, control valve; 3, small Roots pump; 4, large Roots pump; 5, cooling assembly; 51, cooling box; 52, box cover; 53, insert; 54, partition; 55, refrigerator; 56, heat sink; 57, water pump; 58, three-way valve; 59, water distribution pipe; 6, water supply pipe; 7, gas-liquid separator; 8, exhaust pipe; 9, pressure relief valve; 10, branch pipe; 11, first connecting pipe; 12, soft connecting pipe; 13, first one-way valve; 14, second connecting pipe; 15, second one-way valve. DETAILED DESCRIPTION
[0025] 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.
[0026] See also Figure 1-Figure 4 A Roots water ring vacuum unit shown in the figure comprises a base plate 1, a two-stage water ring pump 2, a small Roots pump 3, a large Roots pump 4 and a cooling assembly 5. The two-stage water ring pump 2, the small Roots pump 3, the large Roots pump 4 and the cooling assembly 5 are all mounted on the surface of the base plate 1 through a stainless steel bracket. The water outlet of the two-stage water ring pump 2 is connected to a gas-liquid separator 7, the end of the gas-liquid separator 7 is connected to the water inlet of the small Roots pump 3, the periphery of the gas-liquid separator 7 is connected to a branch pipe 10, the water outlet of the small Roots pump 3 is connected to a first connecting pipe 11, the first connecting pipe 11 is connected to the water inlet of the large Roots pump 4 through a second connecting pipe 14, and the branch pipe 10 is connected to the water outlet of the small Roots pump 3. The end of the tube 10 is connected to the second connecting pipe 14. Soft connecting pipes 12 are installed between the end of the gas-liquid separator 7 and the water inlet of the small Roots pump 3, between the first connecting pipe 11 and the second connecting pipe 14, and between the second connecting pipe 14 and the water inlet of the large Roots pump 4. The soft connecting pipes 12 can prevent the entire system pipeline from vibrating due to equipment vibration, causing equipment damage and pipeline rupture. There is a power difference between the large Roots pump 4 and the small Roots pump 3. Under the relay of the two Roots pumps, the vacuum degree is improved, and they can be switched for use according to the working conditions to ensure the vacuum salt production output while meeting the production requirements.
[0027] Furthermore, the cooling assembly 5 includes a cooling box 51, which is installed on the surface of the base plate 1, and a box cover 52 is attached to the top of the cooling box 51, a partition 54 is installed on the inner bottom surface of the cooling box 51, and a strip 53 inserted into the top of the partition 54 is fixed at the bottom of the box cover 52, a refrigerator 55 is installed on the inner bottom surface of the cooling box 51, a water pump 57 is installed on the outer wall of the cooling box 51, and a three-way valve 58 is installed at the water outlet of the water pump 57, and water distribution pipes 59 are connected to both air outlets of the three-way valve 58, a heat dissipation groove 56 is constructed on the side wall of the cooling box 51, and a water pipe 6 that penetrates the partition 54 is connected to the side wall of the cooling box 51, and the ends of the water pipe 6 are respectively connected to the input pipe 21 of the two-stage water ring pump 2.
[0028] Furthermore, the two-stage water ring pump 2 is equipped with a symmetrically arranged input pipe 21, and a control valve 22 is installed on each of the input pipes 21, an exhaust pipe 8 is installed on the gas-liquid separator 7, and a pressure relief valve 9 is installed on the exhaust pipe 8, a first one-way valve 13 is installed on the branch pipe 10, and a second one-way valve 15 is installed on the second connecting pipe 14.
[0029] It should be noted that the utility model is a Roots water ring vacuum unit, which passes the high-temperature gas into the cooling box 51 through the water pipe 6, and is appropriately cooled by the refrigerator 55 in the inner cavity of the cooling box 51, and then passes into the input pipe 21 through the corresponding water distribution pipe 59. The gas is initially accelerated and pressurized under the action of the two-stage water ring pump 2, and then sent to the gas-liquid separator 7. The air in the liquid is discharged through the pressure relief valve 9. The corresponding large Roots pump 4 or small Roots pump 3 or the large Roots pump 4 and the small Roots pump 3 are switched in advance according to the salt making working conditions. When only the large Roots pump 4 is working, the gas-liquid separator The liquid flowing out of 7 is passed into the large Roots pump 4 through the branch pipe 10 and the end of the second connecting pipe 14, and is further pressurized twice by the large Roots pump 4. Only when the small Roots pump 3 is working, the liquid flowing out of the gas-liquid separator 7 is directly passed into the small Roots pump 3 for secondary pressurization. When the large Roots pump 4 and the small Roots pump 3 are working at the same time, the outflowing liquid is first passed into the small Roots pump 3 for secondary pressurization, and then passed into the large Roots pump 4 through the first connecting pipe 11 and the second connecting pipe 14 for tertiary pressurization. When the above pipelines are switched on and off, the valve on the corresponding pipeline can be controlled to open and close to achieve the switching of the flow direction of the pipeline.
[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used 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. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0031] Although the 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 Roots water ring vacuum unit, comprising a bottom plate (1), characterized in that: The invention also comprises a two-stage water ring pump (2), a small Roots pump (3), a large Roots pump (4) and a cooling assembly (5). The two-stage water ring pump (2), the small Roots pump (3), the large Roots pump (4) and the cooling assembly (5) are all mounted on the surface of the base plate (1) via a stainless steel bracket. The water outlet of the two-stage water ring pump (2) is connected to a gas-liquid separator (7). The end of the gas-liquid separator (7) is connected to the water inlet of the small Roots pump (3). The periphery of the gas-liquid separator (7) is connected to a branch pipe (10). The water outlet of the small Roots pump (3) is connected to a first connecting pipe (11). The first connecting pipe (11) is connected to the water inlet of the large Roots pump (4) via a second connecting pipe (14). The end of the branch pipe (10) is connected to the second connecting pipe (14).
2. A Roots water ring vacuum unit according to claim 1, characterized in that: The cooling assembly (5) comprises a cooling box (51), the cooling box (51) being mounted on the surface of the bottom plate (1), and a box cover (52) being attached to the top of the cooling box (51), a partition (54) being mounted on the inner bottom surface of the cooling box (51), a plug strip (53) being fixed to the bottom of the box cover (52) and plugged into the top of the partition (54), a refrigerator (55) being mounted on the inner bottom surface of the cooling box (51), a water pump (57) being mounted on the outer wall of the cooling box (51), and a three-way valve (58) being mounted on the water outlet of the water pump (57), and both air outlets of the three-way valve (58) being connected to water distribution pipes (59).
3. The Roots water ring vacuum unit according to claim 1, characterized in that: Soft connecting pipes (12) are installed between the end of the gas-liquid separator (7) and the water inlet of the small Roots pump (3), between the first connecting pipe (11) and the second connecting pipe (14), and between the second connecting pipe (14) and the water inlet of the large Roots pump (4).
4. A Roots water ring vacuum unit according to claim 1, characterized in that: The two-stage water ring pump (2) is provided with symmetrically arranged input pipes (21), and each input pipe (21) is provided with a control valve (22).
5. The Roots water ring vacuum unit according to claim 3, characterized in that: An exhaust pipe (8) is installed on the gas-liquid separator (7), and a pressure relief valve (9) is installed on the exhaust pipe (8).
6. The Roots water ring vacuum unit according to claim 1, characterized in that: A first one-way valve (13) is installed on the branch pipe (10), and a second one-way valve (15) is installed on the second connecting pipe (14).
7. A Roots water ring vacuum unit according to claim 2, characterized in that: The side wall of the cooling box (51) is configured with a heat dissipation groove (56), and the side wall of the cooling box (51) is connected to a water pipe (6) that passes through the partition (54).