Low-temperature Roots blower

Abstract

The utility model relates to the technical field of Roots blowers, in particular to a low-temperature Roots blower. Comprising a shell, a draught fan, an air inlet pipe, a baffle, a backflow pipe, a heat exchanger, a pushing assembly and an inflow pipe, the draught fan is arranged in the shell, a certain space exists between the draught fan and the shell, a cavity surrounding the draught fan and used for circulation of cooling liquid is formed, the air inlet pipe communicated with the interior of the draught fan is arranged on the shell, and the baffle is arranged between the shell and the front side of the draught fan. The left side of the baffle communicates with a backflow pipe, the right end of the backflow pipe is provided with a heat exchanger, the other end of the heat exchanger is connected with a pushing assembly for pushing cooling liquid to operate, the other end of the pushing assembly communicates with an inflow pipe, and the tail end of the inflow pipe communicates with the right side of the baffle. According to the utility model, the heat exchanger is matched with the electric impeller to push the heated cooling liquid in the cavity to circulate, so that the low-temperature state of the device is kept, a more suitable operation environment is provided for the operation of the fan, and the condition of high-temperature load is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of Roots blowers, and in particular to a low-temperature Roots blower. Background Art

[0002] Roots blower is a positive displacement blower. The working principle of this blower is to use a pair of intermeshing electric impellers (usually three-blade or two-blade shape) to make relative motion in the cylinder to compress and transport gas. When the electric impellers rotate, the volume formed between them and the cylinder wall will change, so that the gas is sucked in and compressed, and finally the gas is discharged from the outlet. The characteristics of Roots blower are its simple and reliable structure, and high efficiency at low pressure, which is particularly suitable for gas transportation and pressurization systems.

[0003] According to a new type of low-temperature and high-pressure special Roots blower with authorization announcement number CN210977861U, a heat-insulating sealing gasket is added between the wall panel and the side panel, the sealing bushing adopts a broken bridge combination design, and a heat-insulating sealing gasket is added between the two bushings to prevent the low temperature from affecting the lubrication of the bearing part; a double-end mechanical seal is adopted at the shaft extension end to prevent external leakage of the conveying medium and ensure zero leakage of the conveying medium; the patent improves the overall sealing of the body through the above structure, and achieves the effect of resistance to low temperature and pressure when transporting gas materials. However, there are still certain deficiencies in the cooling treatment of the body itself. When the body is in a high-temperature environment, it is easy to be affected by the heat generated by the high-load operation of the blower itself when transporting low-temperature gas materials for a long time due to poor cooling treatment. The quality of the material is affected.

[0004] Therefore, in view of the above problems, it is urgent to propose a low-temperature Roots blower that can perform effective cooling treatment. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the utility model provides a low-temperature Roots blower capable of performing effective temperature reduction treatment.

[0006] The technical solution is: a low-temperature Roots blower, including a shell, a fan, an air inlet pipe, a baffle, a return pipe, a heat exchanger, a driving component and an inlet pipe. The fan is arranged inside the shell, and there is a certain space between the two to form a cavity around the fan for circulating coolant. The shell is provided with an air inlet pipe connected to the inside of the fan, and a baffle is arranged between the shell and the front side of the fan. The left side of the baffle is connected to the return pipe, and the right end of the return pipe is installed with a heat exchanger. The other end of the heat exchanger is connected to a driving component for driving the coolant to operate, and the other end of the driving component is connected to the inlet pipe, and the end of the inlet pipe is connected to the right side of the baffle.

[0007] As an improvement to the above solution, the driving component includes a connection frame and an electric impeller. A connection frame is provided at the right end of the heat exchanger, and an electric impeller for driving the coolant to operate is installed inside the connection frame.

[0008] As an improvement to the above solution, it further includes a liquid injection pipe, a cover plate, and a liquid replenishment pipe. A liquid injection pipe is provided on the inflow pipe through the liquid replenishment pipe, and a cover plate is provided at the top of the liquid injection pipe.

[0009] As an improvement to the above solution, it further includes a piston, a float, and a retaining ring. A piston is slidably arranged inside the liquid replenishment pipe. Three through-hole positions are provided on the piston. A float is provided at the bottom end of the piston, and a retaining ring for blocking the hole positions of the piston is provided on the inner wall of the liquid replenishment pipe.

[0010] As an improvement to the above solution, the three through-hole positions on the piston communicate in the upper, left, and right three directions, matching the flow directions of the inflow pipe and the liquid injection pipe.

[0011] As an improvement to the above solution, the diameter of the float is larger than the diameter of the liquid replenishment pipe.

[0012] Beneficial effects: 1. Through the cooperation of the heat exchanger and the electric impeller, the present utility model drives the heated coolant in the cavity to circulate, thereby maintaining the low-temperature state of the device, providing a more suitable operating environment for the operation of the fan, and thus avoiding the occurrence of high-temperature load conditions;

[0013] 2. Through the cooperation of the piston and the float, the present utility model controls the liquid leakage operation in the liquid injection pipe, thereby achieving effective liquid replenishment, ensuring the filling of the coolant, and thus ensuring the overall cooling cycle effect of the device. Description of the Drawings

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model.

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the housing, the fan, and the intake pipe of the present utility model.

[0016] Figure 3 It is a three-dimensional structural sectional view of parts such as the baffle, the return pipe, and the heat exchanger of the present utility model.

[0017] Figure 4 It is a three-dimensional structural sectional view of parts such as the connection frame, the electric impeller, and the inflow pipe of the present utility model.

[0018] Figure 5 It is a three-dimensional structural sectional view of parts such as the piston, the float, and the retaining ring of the present utility model.

[0019] Names of the reference numerals in the figure: 1. Outer shell, 101. Cavity, 2. Fan, 3. Intake pipe, 4. Baffle, 5. Return pipe, 6. Heat exchanger, 7. Connection frame, 8. Electric impeller, 9. Inflow pipe, 10. Liquid injection pipe, 11. Cover plate, 12. Liquid replenishing pipe, 13. Piston, 14. Floater, 15. Stop ring. Detailed implementation manners

[0020] The above solution will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are for illustrating the present application and not for limiting the scope of the present application. The implementation conditions adopted in the embodiments can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are usually those in conventional experiments.

[0021] Embodiment: A low-temperature Roots blower, as Figures 1-5 shown, includes an outer shell 1, a fan 2, an intake pipe 3, a baffle 4, a return pipe 5, a heat exchanger 6, a driving assembly, and an inflow pipe 9. A fan 2 is provided on the front side wall of the outer shell 1. The fan 2 is a Roots blower. There is a certain space between the outer shell 1 and the fan 2 to form a cavity 101 for circulating the coolant around the fan 2, so that the cavity 101 presents a ring shape, which can surround the fan 2 to the greatest extent, thereby covering the surface of the fan 2 with the coolant to ensure a good cooling effect. An intake pipe 3 communicating with the inside of the fan 2 is provided on the outer shell 1. The intake pipe 3 supplies gas to the fan 2 to ensure the normal operation of the fan 2. And a baffle 4 is provided between the inner front sides of the outer shell 1 and the fan 2. The baffle 4 closes the cavity 101 to achieve the effect of overall closure. A return pipe 5 is connected to the left side of the baffle 4. The return pipe 5 is used for transporting the high-temperature coolant. A heat exchanger 6 is installed at the right end of the return pipe 5. The heat exchanger 6 can cool down the high-temperature coolant. A driving assembly for driving the coolant to operate is connected to the right end of the heat exchanger 6. The driving assembly is the main driving source. And an inflow pipe 9 is connected to the right end of the driving assembly. The inflow pipe 9 is used for transporting the cooled and warmed-up coolant. The end of the inflow pipe 9 is connected to the right side of the baffle 4 to form a connected circulation channel for the coolant to continuously circulate and ensure the cooling effect of the fan 2.

[0022] As Figure 4 shown, the driving assembly includes a connection frame 7 and an electric impeller 8. A connection frame 7 is provided at the right end of the heat exchanger 6. An electric impeller 8 for driving the coolant to operate is installed in the connection frame 7. The electric impeller 8 can extract and drive the operation of the coolant.

[0023] As Figure 4 and Figure 5As shown, it further includes a liquid injection pipe 10, a cover plate 11, and a liquid replenishment pipe 12. A liquid injection pipe 10 is provided through the liquid replenishment pipe 12 on the left side of the top of the inflow pipe 9. The liquid injection pipe 10 is used for temporarily storing the liquid to be replenished. A cover plate 11 is provided at the top end of the liquid injection pipe 10 to facilitate the liquid addition operation of the liquid injection pipe 10.

[0024] As Figure 4 and Figure 5 shown, it further includes a piston 13, a float 14, and a retaining ring 15. A piston 13 is slidably arranged in the liquid replenishment pipe 12. Three through-hole positions are provided on the piston 13. The three hole positions of the three through-hole positions are respectively connected in the upper, left, and right directions, matching the flow directions of the inflow pipe 9 and the liquid injection pipe 10, and can ensure the flow of the liquid in the liquid injection pipe 10. A float 14 is provided at the bottom end of the piston 13. The diameter of the float 14 is larger than the diameter of the liquid replenishment pipe 12, which can limit the upward movement of the piston 13. And the density of the float 14 is less than the density of the coolant, so that the float 14 can be pushed by the liquid and then float, thereby driving the up and down movement of the piston 13 to achieve the effect of controlling the closing of the three through-hole positions. A retaining ring 15 for blocking the hole positions of the piston 13 is provided on the inner wall of the liquid replenishment pipe 12. The retaining ring 15 can block the three through-hole positions after the piston 13 moves upward into the liquid replenishment pipe 12, thereby blocking the outflow of the liquid.

[0025] When the fan 2 is in use, the fan 2 is placed inside the housing 1, and the cavity 101 between the two is filled with a coolant. The components communicating with both sides of the cavity 101 are also in a full-liquid state to maintain the normal temperature state of the fan 2. During the operation of the fan 2, the coolant will heat up with the operation of the fan 2, and part of the liquid will be evaporated due to the high temperature, leaving a part of the space inside, allowing the coolant to circulate. Here, the electric impeller 8 is always in an operating state. By continuously rotating the electric impeller 8, the coolant in the cavity 101 is pumped, causing the coolant to enter the return pipe 5, and then flowing to the heat exchanger 6. The heat exchanger 6 cools the heated coolant. Subsequently, the coolant flows through the heat exchanger 6 into the connection frame 7, and then is pushed by the electric impeller 8 into the inflow pipe 9, and enters the other side of the cavity 101 through the inflow pipe 9, continuously circulating in this way, so as to achieve the circulating cooling effect of maintaining a low temperature. During this circulating process, a part of the evaporated liquid is still missing from the coolant in the cavity 101, that is, the coolant in the cavity 101 is not enough to fill it, and there is still space. It is necessary to replenish the extra space. First, connect the liquid injection pipe 10 to an external pump body. The liquid in the liquid injection pipe 10 flows downward under the push of the pump body. The coolant continuously flows through the inflow pipe 9. The piston 13 and the float 14 are below the liquid replenishment pipe 12. The liquid injection pipe 10 continuously leaks liquid to the piston 13 to fill the missing liquid volume. When the coolant fills the whole again, turn off the pump body. The liquid in the inflow pipe 9 pushes the float 14 upward, and then the piston 13 moves upward into the liquid replenishment pipe 12. The three-through hole inside the liquid replenishment pipe 12 is pushed to the retaining ring 15, and the liquid in the liquid injection pipe 10 no longer circulates. Finally, operate in this cycle.

[0026] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A low temperature Roots blower, characterized in that: The invention comprises a shell (1), a fan (2), an air inlet pipe (3), a baffle (4), a return pipe (5), a heat exchanger (6), a driving component and an inlet pipe (9), wherein the fan (2) is arranged inside the shell (1), and the shell (1) is provided with an air inlet pipe (3) which is communicated with the inside of the fan (2), a certain space is provided between the shell (1) and the fan (2), forming a cavity (101) surrounding the fan (2) for circulating cooling liquid, and a baffle (4) is provided between the shell (1) and the front side of the fan (2), the left side of the baffle (4) is connected to the return pipe (5), the right end of the return pipe (5) is installed with the heat exchanger (6), the other end of the heat exchanger (6) is connected to the driving component for driving the cooling liquid to operate, the other end of the driving component is connected to the inlet pipe (9), and the end of the inlet pipe (9) is connected to the right side of the baffle (4).

2. A low temperature Roots blower according to claim 1, characterized in that: The driving component comprises a connecting frame (7) and an electric impeller (8). The right end of the heat exchanger (6) is provided with a connecting frame (7), and the connecting frame (7) is provided with an electric impeller (8) for driving the operation of the coolant.

3. A low temperature Roots blower according to claim 2, characterized in that: It also comprises a liquid injection pipe (10), a cover plate (11) and a liquid replenishment pipe (12); the liquid injection pipe (10) is arranged on the inlet pipe (9) via the liquid replenishment pipe (12); and the top end of the liquid injection pipe (10) is arranged with a cover plate (11).

4. A low temperature Roots blower according to claim 3, characterized in that: It also includes a piston (13), a float (14) and a retaining ring (15); the piston (13) is slidably arranged in the infusion tube (12); a three-way hole is opened on the piston (13); a float (14) is arranged at the bottom end of the piston (13); and a retaining ring (15) is arranged on the inner wall of the infusion tube (12) for blocking the hole of the piston (13).

5. A low temperature Roots blower according to claim 4, characterized in that: The three-way holes on the piston (13) are connected in three directions: upper, left and right, matching the flow directions of the inlet pipe (9) and the injection pipe (10).

6. A low temperature Roots blower according to claim 5, characterized in that: The diameter of the float (14) is greater than the diameter of the fluid infusion tube (12).

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