Oil return pipe assembly of low-pressure nitrogen motor

Abstract

The utility model relates to the technical field of low-pressure nitrogen compressor motors, in particular to an oil return pipe assembly of a low-pressure nitrogen compressor, and adopts the technical scheme that the oil return pipe assembly comprises an oil return pipe body, an oil well pump, a cooling mechanism and a heating mechanism, the oil return pipe body comprises a first oil return pipe and a second oil return pipe, and a pressure detection valve is arranged at the tail part of the first oil return pipe; the heating mechanism comprises an annular protection pipe and heating pipes, the heating pipes are evenly arranged on the outer surface of the first oil return pipe, the annular protection pipe is installed on the outer surface of the first oil return pipe, a closed cavity is formed between the annular protection pipe and the first oil return pipe, the cooling mechanism comprises a cooling pipe fitting, and the cooling pipe fitting is arranged on the outer side of the first oil return pipe. A water cavity is formed between the cooling pipe fitting and the first oil return pipe. The oil return device has the advantages that the oil pressure can be detected, the oil return pressure can be increased, the oil temperature can be controlled, oil return is smooth, production interruption caused by motor faults is avoided, the motor runs well, and the production requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of low-pressure nitrogen compressor motors, in particular to an oil return pipe assembly for a low-pressure nitrogen motor. Background Art

[0002] A nitrogen compressor is a special compressor that is mainly used to compress nitrogen to a higher pressure and transport it to equipment and places that need nitrogen. The use of nitrogen compressors is very extensive. It can be used in industries such as petroleum, chemical, metallurgy, and electric power to supply nitrogen in the production process. In addition, nitrogen compressors can also be used in food, pharmaceuticals, and other fields that require nitrogen protection.

[0003] Under normal oil supply pressure, the low-pressure nitrogen motor has no blockage in the oil supply and return pipelines, the bearing box oil level is full, the oil return is not smooth, and oil often enters the inner cavity of the motor stator, which will affect the normal operation of the low-pressure nitrogen motor. Therefore, the utility model provides a low-pressure nitrogen motor oil return pipe assembly. Utility Model Content

[0004] The purpose of the utility model is to provide a low-pressure nitrogen motor oil return pipe assembly, which has the advantages of being able to detect oil pressure and increase oil return pressure, and control oil temperature to ensure smooth oil return, avoid production interruption caused by motor failure, and enable the motor to run well to meet production needs, thereby solving the problems raised by the above-mentioned background technology.

[0005] To achieve the above object, the utility model provides the following technical solutions: a low-pressure nitrogen motor oil return pipe assembly, including an oil return pipe body, an oil pump, a cooling mechanism and a heating mechanism, the oil return pipe body including a first oil return pipe and a second oil return pipe, and a pressure detection valve is arranged at the tail position of the first oil return pipe;

[0006] The heating mechanism comprises an annular protection tube and a heating tube, the heating tubes are evenly arranged on the outer surface of the first oil return tube, the annular protection tube is installed on the outer surface of the first oil return tube, a closed cavity is formed between the annular protection tube and the first oil return tube, and the heating tube is located in the closed cavity;

[0007] The cooling mechanism comprises a cooling pipe fitting, which is arranged outside the first oil return pipe, and a water cavity is formed between the cooling pipe fitting and the first oil return pipe.

[0008] When using the low-pressure nitrogen motor oil return pipe assembly of the utility model,

[0009] When returning the oil, the return oil pressure is detected by the pressure detection valve. When the return oil pressure is low, the return oil pressure can be increased by the oil pump, so that the return oil can be smooth and production interruptions caused by motor failure can be avoided. The oil pump can be used in conjunction with the second oil return pipe to output the oil for return. During the process, the oil can be heated or cooled according to the oil temperature. When the oil temperature is low, the oil in the first oil return pipe can be heated by the heating pipe, and cooling water can be added to the cooling pipe fittings through the water inlet pipe. The oil in the first oil return pipe can be cooled by the cooling water, and the oil temperature can be controlled to facilitate the oil return work.

[0010] Preferably, a water inlet pipe is provided on one side of the upper end surface of the cooling pipe, the water inlet pipe is connected to the water cavity, and a valve is provided on the water inlet pipe.

[0011] Preferably, a water outlet pipe is provided on one side of the lower end surface of the cooling pipe, the water outlet pipe is communicated with the water cavity, and a valve is provided on the water outlet pipe.

[0012] Preferably, the oil pump is arranged at the end of the first oil return pipe, and the end of the first oil return pipe is connected to the inlet of the oil pump.

[0013] Preferably, a second oil return pipe is installed at the outlet of the oil pump.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: when returning oil, the return oil pressure is detected by a pressure detection valve. When the return oil pressure is low, the return oil pressure is increased by the oil pump. At the same time, the oil can be heated or cooled according to the oil temperature, which can effectively prevent oil from entering the inner cavity of the motor stator, make the return oil unobstructed, avoid production interruption caused by motor failure, and make the motor run well to meet production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0017] Figure 3 This is a schematic diagram of the oil return pipe structure of the utility model;

[0018] Figure 4 It is a partial structural schematic diagram of the utility model.

[0019] The reference numerals and names in the figures are as follows:

[0020] 100. Oil return pipe body; 101. Pressure detection valve; 102. Oil pump; 103. Second oil return pipe; 104. First oil return pipe; 200. Cooling mechanism; 201. Cooling pipe fittings; 202. Water inlet pipe; 203. Water outlet pipe; 300. Heating mechanism; 301. Annular protective pipe; 302. Heating pipe; 303. Enclosed cavity. DETAILED DESCRIPTION

[0021] 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.

[0022] Embodiment 1

[0023] See also Figures 1 to 4 The utility model provides an embodiment: a low-pressure nitrogen motor oil return pipe assembly, comprising:

[0024] The oil return pipe body 100, the oil pump 102, the cooling mechanism 200 and the heating mechanism 300, the oil return pipe body 100 includes a first oil return pipe 104 and a second oil return pipe 103, and a pressure detection valve 101 is arranged at the tail of the first oil return pipe 104;

[0025] The heating mechanism 300 includes an annular protection tube 301 and a heating tube 302. The heating tube 302 is evenly arranged on the outer surface of the first oil return tube 104. The annular protection tube 301 is installed on the outer surface of the first oil return tube 104. A closed cavity 303 is formed between the annular protection tube 301 and the first oil return tube 104. The heating tube 302 is located in the closed cavity 303.

[0026] The cooling mechanism 200 includes a cooling pipe 201 . The cooling pipe 201 is disposed outside the first oil return pipe 104 . A water cavity is formed between the cooling pipe 201 and the first oil return pipe 104 .

[0027] In this embodiment, when returning the oil, the return oil pressure is detected by the pressure detection valve 101. If the return oil pressure is low, the return oil pressure is increased by the oil pump 102. At the same time, the oil can be heated or cooled according to the oil temperature. When the oil temperature is low, the oil in the first return oil pipe 104 can be heated by the heating pipe 302, and cooling water can be added to the cooling pipe 201 through the water inlet pipe 202. The oil in the first return oil pipe 104 can be cooled by the cooling water, and the temperature of the oil can be controlled to facilitate the oil return work.

[0028] Furthermore,

[0029] A water inlet pipe 202 is disposed on one side of the upper end surface of the cooling pipe 201 . The water inlet pipe 202 is communicated with the water cavity, and a valve is disposed on the water inlet pipe 202 .

[0030] Cooling water can be added into the cooling pipe 201 through the water inlet pipe 202, and the oil can be cooled by the cooling water.

[0031] Furthermore,

[0032] A water outlet pipe 203 is disposed on one side of the lower end surface of the cooling pipe 201 . The water outlet pipe 203 is communicated with the water cavity, and a valve is disposed on the water outlet pipe 203 .

[0033] The cooling water in the cooling pipe 201 can be discharged through the water outlet pipe 203 .

[0034] The pressure detection valve 101 and the heating tube 302 in the utility model are well-known devices, and their working principles and circuit connections are well known to technicians in the field. They are conventional means or common knowledge and will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0035] Embodiment 2

[0036] See also Figures 1 to 4 The utility model provides an embodiment: a low-pressure nitrogen motor oil return pipe assembly. Compared with the first embodiment, this embodiment also includes:

[0037] The oil pump 102 is disposed at the end of the first oil return pipe 104 , and the end of the first oil return pipe 104 is connected to the inlet of the oil pump 102 .

[0038] In this embodiment, when the return oil pressure is low, the return oil pressure can be increased by operating the oil pump 102, so that the return oil can be unobstructed, thereby avoiding production interruptions caused by motor failure. The oil can be output for return oil by cooperating with the second oil return pipe 103 through the oil pump 102.

[0039] Furthermore,

[0040] A second oil return pipe 103 is installed at the outlet of the oil pump 102 .

[0041] The oil pump 102 in the present invention is a well-known device, and its working principle and circuit connection are well known to technicians in the field, and are conventional means or common knowledge, so they will not be elaborated here. Those skilled in the art can make any selection according to their needs or convenience.

[0042] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A low-pressure nitrogen motor oil return pipe assembly, comprising an oil return pipe body (100), an oil pump (102), a cooling mechanism (200) and a heating mechanism (300), characterized in that: The oil return pipe body (100) comprises a first oil return pipe (104) and a second oil return pipe (103), and a pressure detection valve (101) is arranged at the tail of the first oil return pipe (104); The heating mechanism (300) comprises an annular protection tube (301) and a heating tube (302); the heating tube (302) is evenly arranged on the outer surface of the first oil return tube (104); the annular protection tube (301) is installed on the outer surface of the first oil return tube (104); a closed cavity (303) is formed between the annular protection tube (301) and the first oil return tube (104); and the heating tube (302) is located in the closed cavity (303); The cooling mechanism (200) comprises a cooling pipe (201), which is arranged outside the first oil return pipe (104), and a water cavity is formed between the cooling pipe (201) and the first oil return pipe (104).

2. A low-pressure nitrogen motor oil return pipe assembly according to claim 1, characterized in that: A water inlet pipe (202) is provided on one side of the upper end surface of the cooling pipe (201); the water inlet pipe (202) is connected to the water cavity, and a valve is provided on the water inlet pipe (202).

3. The low-pressure nitrogen motor oil return pipe assembly according to claim 1, characterized in that: A water outlet pipe (203) is provided on one side of the lower end surface of the cooling pipe (201); the water outlet pipe (203) is communicated with the water cavity, and a valve is provided on the water outlet pipe (203).

4. The low-pressure nitrogen motor oil return pipe assembly according to claim 1, characterized in that: The oil pump (102) is arranged at the end of the first oil return pipe (104), and the end of the first oil return pipe (104) is connected to the inlet of the oil pump (102).

5. The low-pressure nitrogen motor oil return pipe assembly according to claim 4, characterized in that: A second oil return pipe (103) is installed at the outlet of the oil pump (102).

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