Roots blower

Abstract

The utility model discloses a Roots blower which comprises a Roots pump and a driving motor in transmission connection with an input shaft of the Roots pump, an air inlet pipe and an air outlet pipe are arranged on the Roots pump, an auxiliary pipe is connected between the air outlet pipe and the air inlet pipe in series, an electromagnetic valve is connected to the auxiliary pipe in series, an air filtering assembly is arranged in the air inlet pipe, and an air outlet pipe is arranged in the air filtering assembly. The communication part of the auxiliary pipe and the air inlet pipe is arranged at one end, back on to the roots pump, of the air filtering assembly; a pipe opening of the air inlet pipe is covered with a flow blocking soft rubber plate, flow blocking holes are formed in the flow blocking soft rubber plate, and soft rubber valve clacks which block the hole opening and are integrated with the flow blocking soft rubber plate are distributed on the inner circumference of the flow blocking holes. The Roots blower has the characteristics of blockage prevention at the air inlet end and low replacement frequency of the filter assembly, and is complete in overall function and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of blowers, and more specifically, to a Roots blower. Background Art

[0002] The pump body of a Roots blower is usually provided with an air inlet pipe and an air outlet pipe, and a filter assembly needs to be arranged in the air inlet pipe to filter the air before entering the pump body. Because such blowers usually have a long working time, high requirements are placed on the filtering performance of the filter assembly. Ordinary filter consumables need to be replaced after a certain period of use, and the replacement frequency is high, resulting in poor overall effect. Accordingly, the utility model proposes a Roots blower. Utility Model Content

[0003] The utility model aims to overcome the above-mentioned deficiencies in the prior art and provide a Roots blower having the characteristics of anti-blocking of the air inlet end and low replacement frequency of the filter assembly.

[0004] To solve the above technical problems, the purpose of the utility model is achieved as follows: the utility model involves a Roots blower, comprising a Roots pump and a driving motor drivingly connected to the input shaft of the Roots pump, the Roots pump is provided with an air inlet pipe and an air outlet pipe, an auxiliary pipe is connected in series between the air outlet pipe and the air inlet pipe, a solenoid valve is connected in series to the auxiliary pipe, an air filter assembly is provided in the air inlet pipe, and the connecting point between the auxiliary pipe and the air inlet pipe is arranged at the end of the air filter assembly facing away from the Roots pump.

[0005] The utility model is further configured as follows: the pipe opening of the air inlet pipe is covered with a flow-blocking soft rubber plate, a flow-blocking hole is opened on the flow-blocking soft rubber plate, and a soft rubber valve flap is arranged inside the flow-blocking hole to block the hole opening and is integrated with the flow-blocking soft rubber plate.

[0006] The utility model is further configured as follows: the flow-blocking soft rubber plate is made of rubber material.

[0007] The utility model is further configured as follows: the auxiliary pipe is a hard pipe.

[0008] The utility model is further configured as follows: the air filter assembly includes a filter screen or filter cotton.

[0009] In summary, the utility model has the following beneficial effects: the Roots blower involved in the utility model, by connecting an auxiliary pipe which is opened and closed at a certain time between the air inlet pipe and the air outlet pipe, can make a part of the airflow at the air outlet end flow into the air inlet pipe along the auxiliary pipe when the auxiliary pipe is turned on, and back-blow the air filter component in the air inlet pipe, which plays a role in preventing blockage. The spacing prolongs the filtration time of the air filter component and reduces the replacement frequency. The overall function is perfect and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0011] Figure 2 It is a partial structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0012] In order to enable those skilled in the art to better understand the technical solution of the utility model, the preferred implementation scheme of the utility model is described below in conjunction with specific embodiments, but it should be understood that these descriptions are only for further illustrating the features and advantages of the utility model, rather than limiting the patent requirements of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0013] The utility model is further described below in conjunction with the accompanying drawings and preferred embodiments.

[0014] Example 1

[0015] See also Figure 1 As shown, a Roots blower involved in this embodiment includes a Roots pump 1 and a driving motor (not shown) drivingly connected to the input shaft of the Roots pump 1, the Roots pump 1 is provided with an air inlet pipe 2 and an air outlet pipe 3, a hard auxiliary pipe 4 is connected in series between the air outlet pipe 3 and the air inlet pipe 2, a solenoid valve 5 is connected in series to the auxiliary pipe 4, an air filter assembly 6 is provided in the air inlet pipe 2, the air filter assembly 6 includes a filter screen or filter cotton, and the connecting point between the auxiliary pipe 4 and the air inlet pipe 2 is arranged at the end of the air filter assembly 6 facing away from the Roots pump 1.

[0016] In this embodiment, first, the electromagnetic valve 5 is in a closed state, and the auxiliary pipe 4 is not conducting. At this time, the drive motor is operated, the Roots pump 1 is operated, the air inlet pipe 2 takes in air, and the air outlet pipe 3 exhausts air, so as to realize the blowing. When it is necessary to back-blow the air filter assembly 6 in the air inlet pipe 2, the drive motor does not stop, the electromagnetic valve 5 is opened for a short time, the auxiliary pipe 4 is conducted, and part of the air in the air outlet pipe 3 flows into the air inlet pipe 2 through the auxiliary pipe 4, and reversely flushes the air filter assembly 6.

[0017] Example 2

[0018] See also Figure 1 and Figure 2 As shown, the Roots blower involved in this embodiment is further configured on the basis of Embodiment 1, that the pipe opening of the air inlet pipe 2 is covered with a flow-blocking soft rubber plate 7 of rubber material, and the flow-blocking soft rubber plate 7 is provided with flow-blocking holes (unmarked), and the inner periphery of the flow-blocking holes is provided with a soft rubber valve flap 71 which blocks the hole opening and is integrated with the flow-blocking soft rubber plate 7.

[0019] In this embodiment, by providing the flow-blocking soft rubber plate 7, wind resistance is formed on the pipe opening, thereby enhancing the back-blowing cleaning effect.

[0020] The Roots blower involved in the utility model has an auxiliary pipe which is set to open and close at a certain time in series between the air inlet pipe and the air outlet pipe, so that when the auxiliary pipe is turned on, a part of the airflow at the air outlet end can flow into the air inlet pipe along the auxiliary pipe, and back-blow the air filter component in the air inlet pipe, thereby playing an anti-blocking role. The spacing prolongs the filtration time of the air filter component and reduces the replacement frequency. The overall function is perfect and the practicability is strong.

[0021] Unless otherwise specified, in the present invention, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating orientation or positional relationship are based on the orientation or positional relationship actually shown, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood in combination with the embodiments and according to specific circumstances.

[0022] Unless otherwise clearly specified and limited, in the present invention, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A Roots blower, comprising a Roots pump and a drive motor drivingly connected to an input shaft of the Roots pump, characterized in that: The Roots pump is provided with an air inlet pipe and an air outlet pipe, an auxiliary pipe is connected in series between the air outlet pipe and the air inlet pipe, a solenoid valve is connected in series on the auxiliary pipe, an air filter assembly is arranged in the air inlet pipe, and the connection point between the auxiliary pipe and the air inlet pipe is arranged at one end of the air filter assembly facing away from the Roots pump.

2. The Roots blower according to claim 1, characterized in that: The opening of the air inlet pipe is covered with a flow-blocking soft rubber plate, on which a flow-blocking hole is formed, and a soft rubber valve flap is arranged inside the flow-blocking hole to block the opening and is integrated with the flow-blocking soft rubber plate.

3. The Roots blower according to claim 2, characterized in that: The flow-blocking soft rubber plate is made of rubber material.

4. The Roots blower according to any one of claims 1 to 3, characterized in that: The auxiliary pipe is a hard pipe.

5. The Roots blower according to claim 1, characterized in that: The air filter assembly includes a filter screen or filter cotton.

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