Device for preventing gas leakage of Roots blower

Abstract

The utility model discloses a device for preventing gas leakage of a Roots blower, which comprises a Roots blower (2) connected with a motor (1), a blower inlet (21) and a pair of oil injection ports (22) are arranged at the top of the Roots blower (2), a blower outlet (23) is arranged on the side surface of the Roots blower (2), a glycerol sealing hole (22a) is arranged at the shaft diameter of each oil injection port (22), and the glycerol sealing holes (22a) are externally connected with a nitrogen pipe (3). The gas leakage prevention device has the advantages of preventing gas leakage in the using process, reducing gas energy waste, reducing potential safety hazards and ensuring life health of personnel.

Description

Technical Field

[0001] The utility model belongs to the technical field of process transformation of Roots blowers, and in particular relates to a device for preventing gas leakage of Roots blowers. Background Art

[0002] Roots blower, also known as volumetric blower, is mainly composed of five parts: casing, wall panel, impeller, oil tank and muffler. The principle is a rotary compressor that uses two blade-shaped rotors to make relative motion in the cylinder to compress and transport gas. In this way, the gas is continuously transported from the air inlet to the air outlet. This is the entire working process of the Roots blower.

[0003] However, due to the high-speed operation of the machine, it is prone to vibration. The pulsation of the internal air increases the vibration of the Roots blower. The original glycerin seal of the three-leaf Roots blower shaft is not airtight, which causes gas leakage at the shaft neck, delaying the production rhythm and causing poisoning of on-site workers. Utility Model Content

[0004] The utility model aims to solve the problem that the existing Roots blower is prone to gas leakage and has great safety hazards. A device for preventing gas leakage from the Roots blower is provided to prevent gas leakage during use, thereby reducing gas energy waste, lowering safety hazards, and ensuring the life and health of personnel.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A device for preventing gas leakage of a Roots blower comprises a Roots blower connected to a motor, a blower inlet and a pair of oil injection ports are arranged on the top of the blower, a blower outlet is arranged on the side, a glycerin sealing hole is arranged at the axial diameter of each oil injection port, and the glycerin sealing hole is externally connected to a nitrogen pipe for sealing the glycerin sealing hole by a small amount of nitrogen pressure.

[0007] Furthermore, the nitrogen pipe comprises a connected branch pipe and a main pipe, one end of the two branch pipes is respectively connected to the corresponding glycerin sealing holes, and the other end is connected to the main pipe.

[0008] Furthermore, the nitrogen pipeline is a DN20 pipeline.

[0009] Furthermore, the nitrogen pressure in the nitrogen pipeline is 0.5 MPa.

[0010] In the technical solution of the utility model, a DN20 nitrogen gas is installed at the fan column seal to increase internal pressure, and a seal is performed by micro-nitrogen. A vent pipe is installed at the other column seal oil filling hole to effectively prevent gas leakage from the shaft neck, thereby ensuring the safety of personnel, reducing safety hazards, and reducing gas energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the external top view structure of a Roots blower in the prior art;

[0012] Figure 2 This is a simplified structural diagram of the external front view of a Roots blower in the prior art;

[0013] Figure 3 This is a schematic diagram of the structure of a device for preventing gas leakage from a Roots blower according to the utility model from a top view;

[0014] Figure 4 The utility model is a front view structural diagram of a device for preventing gas leakage of a Roots blower. DETAILED DESCRIPTION

[0015] In order to make the present invention more clear, a device for preventing gas leakage of a Roots blower of the present invention is further described below in conjunction with the accompanying drawings. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0016] See also Figure 1 and Figure 2 A device for preventing gas leakage of a Roots blower, comprising a blower inlet 21 and a pair of oil injection ports 22 on the top of a Roots blower 2, and a blower outlet 23 on the side, characterized in that:

[0017] See also Figure 3 and Figure 4 Each oil filling port 22 is provided with a glycerin sealing hole 22a at the axial diameter thereof, and the glycerin sealing hole 22a is externally connected to a nitrogen pipe 3 to seal the glycerin sealing hole with a small amount of nitrogen pressure;

[0018] See also Figure 4 The nitrogen pipe 3 includes a connected branch pipe 31 and a main pipe 32. One end of the two branch pipes 31 is connected to the corresponding glycerin sealing holes 22a respectively, and the other end is connected to the main pipe 32. The nitrogen pipe 3 is a DN20 pipeline, and the nitrogen pressure therein is 0.5MPa.

[0019] Aiming at the problem that the glycerin seal at the shaft diameter of the Roots blower is not tight, the utility model adopts the measure of adding two nitrogen pipelines at the shaft diameter glycerin sealing hole to introduce nitrogen, so as to seal the glycerin sealing hole with a small amount of nitrogen pressure, and after calculation, actual on-site transformation, etc., it is finally confirmed that the DN20 pipeline and the nitrogen pressure of 0.5 MPa can meet the sealing conditions.

[0020] The device of the utility model is applied to a 3L54WD three-blade Roots blower, and can solve the problem of gas leakage through the glycerin sealing hole during the use of the blower, and also reduce the waste of gas energy.

[0021] At present, the calorific value of coke oven gas is about 4200kcal / m³. According to calculation, the gas leakage per hour is about 3m³. The calorific value of 3m³ blast furnace gas is about 750kcal / m³, which can generate 1kwh of electricity. That is, 0.5m³ coke oven gas can generate 1kwh. If this part of gas is used for power generation, then:

[0022] (3 / 0.5*1kwh)*24h*30d*0.65yuan=2808yuan / month.

[0023] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A device for preventing gas leakage from a Roots blower, comprising a Roots blower (2) connected to a motor (1), a blower inlet (21) and a pair of oil injection ports (22) being provided on the top, and a blower outlet (23) being provided on the side, characterized in that: A glycerin sealing hole (22a) is provided at the axial diameter of each oil filling port (22), and the glycerin sealing hole (22a) is externally connected to a nitrogen pipe (3); The nitrogen pipe (3) comprises a connected branch pipe (31) and a main pipe (32), one end of each of the two branch pipes (31) being connected to a corresponding glycerin sealing hole (22a), and the other end being connected to the main pipe (32), and the nitrogen pressure in the nitrogen pipe (3) being 0.5 MPa.

2. The device for preventing gas leakage of Roots blower according to claim 1, characterized in that: The nitrogen pipe (3) is a DN20 pipe.

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