Oil injection system and compressor unit

Abstract

The application provides an oil injection system and a compressor unit, wherein the oil injection system is used for injecting oil into an oil injection equipment, and the oil injection system comprises a pressure reduction part, the pressure reduction part comprises a first pressure reduction unit and a second pressure reduction unit, the first pressure reduction unit comprises a first pressure reduction valve and a first flow channel, the second pressure reduction unit comprises a second pressure reduction valve and a second flow channel, the first pressure reduction valve is arranged on the first flow channel, the second pressure reduction valve is arranged on the second flow channel, and the first flow channel can be selectively communicated with the oil injection equipment or the second flow channel, so that the oil can flow into the oil injection equipment through the first flow channel or flow into the oil injection equipment through the first flow channel and the second flow channel. The oil can be reduced twice, and the single-stage pressure reduction and the two-stage pressure reduction can be switched, so that the injected oil can be completely atomized, and the cleaning capacity is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oil injection equipment, and particularly relates to an oil injection system and a compressor unit. BACKGROUND

[0002] With the continuous increase of domestic ethylene production capacity, more and more ethylene devices encounter the problem of coking of cracking gas compressors. The so-called "coking" is not real coke, but actually "polymer", and it is more reasonable to be called "fouling". In addition to the fouling of internal components of the unit, the heat exchanger is often blocked due to fouling, causing the energy consumption of the unit to rise and the processing capacity to decrease. Fouling in the compressor can cause rotor vibration to increase and operating load to decrease. Meanwhile, fouling with a thickness close to 2mm can partially fall off under the action of centrifugal force, and the falling objects can cause serious mechanical damage between the rotating parts and the stator parts, affecting the normal operation of the compressor.

[0003] The cracking gas compressor usually cleans the fouling by injecting cleaning oil. The generated initial polymer is dissolved and carried away by continuous oil injection to the impeller. Since the pressure difference between the high-pressure cylinder and the low-pressure cylinder of the compressor is large, the prior art only depressurizes the cleaning oil once, the differential pressure of the oil injection nozzle is insufficient, the injected cleaning oil cannot be completely atomized, and the cleaning effect is not obvious. SUMMARY

[0004] Therefore, the technical problem to be solved by the application is to provide an oil injection system and a compressor unit, wherein the oil injection system can depressurize the cleaning oil twice and can switch between single-stage and double-stage depressurization, so as to ensure that the nozzle has sufficient pressure difference, the injected cleaning oil can be completely atomized, and the cleaning capacity is improved.

[0005] In order to solve the above problems, the application provides an oil injection system for injecting oil into a to-be-oiled equipment. The oil injection system comprises a pressure reducing part, the pressure reducing part comprises a first pressure reducing unit and a second pressure reducing unit, the first pressure reducing unit comprises a first pressure reducing valve and a first flow channel, the second pressure reducing unit comprises a second pressure reducing valve and a second flow channel, the first pressure reducing valve is arranged on the first flow channel, the second pressure reducing valve is arranged on the second flow channel, and the first flow channel is selectively connected with the to-be-oiled equipment or the second flow channel, so that the oil can flow into the to-be-oiled equipment through the first flow channel or flow into the to-be-oiled equipment through the first flow channel and the second flow channel.

[0006] Optionally, the pressure reducing part further comprises a third pressure reducing unit, the third pressure reducing unit comprises a third pressure reducing valve and a third flow channel, one end of the third flow channel is connected with the first flow channel and / or the second flow channel, and the other end of the third flow channel is connected with an oil injection pipe.

[0007] Optionally, the oil injection system further comprises a main flow channel and a third flow channel, the first flow channel and the third flow channel are respectively connected with the main flow channel, and the third flow channel is further connected with the oil injection equipment, so that the oil in the main flow channel can selectively flow into the oil injection equipment through the third flow channel or flow into the first flow channel.

[0008] Optionally, the oil injection system further comprises a first adjusting unit, a second adjusting unit and a third adjusting unit, the first adjusting unit is arranged on the first flow channel, the second adjusting unit is arranged on the second flow channel, and the third adjusting unit is arranged on the third flow channel.

[0009] The first adjusting unit, the second adjusting unit and the third adjusting unit all comprise a needle valve and a pressure reducing orifice plate.

[0010] Optionally, the oil injection system further comprises a filtering unit, and the filtering unit is arranged on the main flow channel.

[0011] Optionally, the oil injection system further comprises a detection unit, and the detection unit comprises a first detection device, a second detection device and a third detection device, the first detection device is arranged on the main flow channel, and the first detection device is used for detecting the differential pressure value of the inlet and outlet of the filtering unit.

[0012] The second detection device and the third detection device are arranged on the first flow channel, the second flow channel and the third flow channel, and the second detection device and the third detection device are used for detecting the oil injection pressure and the oil injection amount of the oil injection system.

[0013] Optionally, the oil injection system further comprises a control valve, and the control valve is arranged on the main flow channel.

[0014] Optionally, the oil injection system further comprises a safety unit, and the safety unit is arranged on the main flow channel, and the safety unit is used for discharging the oil outside the oil injection system when the oil injection pressure in the oil injection system exceeds a preset pressure threshold.

[0015] Optionally, the oil injection system further comprises a discharge unit, and the discharge unit is arranged on the first flow channel and the second flow channel, and the discharge unit is used for discharging the residual oil in the oil injection system when the oil injection system stops running.

[0016] Optionally, the oil injection device further comprises a base and a support, the base is fixedly connected with the support, and the support is fixedly connected with the flow channel of the oil injection system.

[0017] Another aspect of the present application provides a compressor unit comprising the oil injection system as described above.

[0018] Advantages

[0019] The oil injection system and the compressor unit provided by the embodiments of the present application have the following advantages. The oil injection system is used to inject cleaning oil into an oil injection equipment. The first pressure reduction unit and the second pressure reduction unit are arranged to reduce the pressure of the pressurized cleaning oil twice, so that the pressure reduction effect is better, and the oil pressure is reduced to a pressure preset value that matches the pressure of the oil injection equipment. The first flow channel is selectively connected to the oil injection equipment or the second flow channel, so that the oil pressure reduction can be switched between single-stage pressure reduction and double-stage pressure reduction, so that different pressure reduction methods are used in different pressure regions of the oil injection equipment, the injection nozzle has sufficient differential pressure, the injected oil is completely atomized, the deposits attached to the oil injection equipment are cleaned, the cleaning ability of the oil for the oil injection equipment is improved, and the oil injection equipment can be kept in normal working condition. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is a top view of the oil injection system of the embodiments of the present application;

[0021] Fig. 2 is a three-dimensional axial side view of the oil injection system of the embodiments of the present application;

[0022] Fig. 3 is a structural schematic view of the main flow channel of the oil injection system of the embodiments of the present application;

[0023] Fig. 4 is a structural schematic view of the oil injection branch pipe of the oil injection system of the embodiments of the present application.

[0024] The reference signs are as follows:

[0025] 11, first pressure reduction unit; 111, first pressure reduction valve; 112, first flow channel; 12, second pressure reduction unit; 121, second pressure reduction valve; 122, second flow channel; 13, third flow channel; 14, main flow channel; 15, first adjusting unit; 16, second adjusting unit; 17, third adjusting unit; 18, needle valve; 19, pressure reduction orifice plate; 20, filtering unit; 21, control valve; 22, detection unit; 221, first detection device; 222, second detection device; 223, third detection device; 23, safety unit; 24, discharge unit; 25, base; 26, bracket. DETAILED DESCRIPTION

[0026] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0030] See also Figs. 1 to 4 As shown in the figure, according to one embodiment of this application, an oil injection system is provided for injecting oil into a device to be injected. The oil injection system includes a pressure reducing unit, which includes a first pressure reducing unit 11 and a second pressure reducing unit 12. The first pressure reducing unit 11 includes a first pressure reducing valve 111 and a first flow channel 112. The second pressure reducing unit 12 includes a second pressure reducing valve 121 and a second flow channel 122. The first pressure reducing valve 111 is disposed on the first flow channel 112, and the second pressure reducing valve 121 is disposed on the second flow channel 122. The first flow channel 112 can be selectively connected to either the device to be injected or the second flow channel 122, so that oil can flow into the device to be injected via the first flow channel 112 or via the first flow channel 112 and the second flow channel 122.

[0031] The first pressure reducing unit 11 and the second pressure reducing unit 12 are arranged to reduce the pressure of the pressurized cleaning oil twice, so that the pressure reducing effect is better, and the pressure of the cleaning oil is reduced to the pressure preset value matched with the pressure of the oil injection equipment, and the first flow channel 112 is selectively connected with the oil injection equipment or the second flow channel 122, so that the cleaning oil can be switched between the first-stage pressure reduction and the second-stage pressure reduction, different cleaning oil pressure reduction modes are adopted for different pressure regions of the oil injection equipment, the injection nozzle has sufficient differential pressure, the oil injection can be completely atomized, the deposits attached to the oil injection equipment are cleaned, the cleaning capacity of the oil to the oil injection equipment is improved, and the oil injection equipment can be kept in normal working condition.

[0032] The oil injection equipment can be a cracking gas compressor, the oil can be a cleaning oil without hydrocarbon solid distillate, corrosion and good solubility, the cleaning oil enters the oil injection system, and is injected towards the blade surface of the cracking gas compressor through the first pressure reducing unit 11 and the second pressure reducing unit 12, so that the polymer in the compressor can be dissolved, and the deposits attached to the compressor working wheel can be cleaned, so that the compressor can be kept in normal working condition.

[0033] The first pressure reducing valve 111 is fixedly connected with the first flow channel 112, the second pressure reducing valve 121 is fixedly connected with the second flow channel 122, and the first flow channel 112 is fixedly connected with the second flow channel 122, which are connected in the form of flange connection or welding, and the connection mode is not limited in the application. In the embodiment of the application, the flange connection is adopted, and compared with the welding, the flange connection is easier to disassemble and is convenient for replacing system components.

[0034] The first pressure reducing valve 111 and the second pressure reducing valve 121 are pressure regulating valves, which are used to regulate the pressure of the cleaning oil to the pressure preset value. As an embodiment, the first pressure reducing valve 111 and the second pressure reducing valve 121 are valves of the same type, the cleaning oil passes through the first pressure reducing valve 111 and the second pressure reducing valve 121 respectively, and the pressure of the cleaning oil is gradually reduced by the first pressure reducing valve 111 and the second pressure reducing valve 121, so that the pressure of the cleaning oil is reduced to the pressure preset value. As another embodiment, the first pressure reducing valve 111 and the second pressure reducing valve 121 are valves of different types, the cleaning oil passes through the first pressure reducing valve 111 and the second pressure reducing valve 121 respectively, the first pressure reducing valve 111 coarsely regulates the cleaning oil to reduce the pressure of the cleaning oil to the pressure preset value, and the second pressure reducing valve 121 accurately regulates the cleaning oil to accurately regulate the pressure of the cleaning oil to the pressure preset value.

[0035] The first pressure reducing unit 11 and the second pressure reducing unit 12 can be provided with a plurality of first pressure reducing valves 111 and second pressure reducing valves 121, and the cleaning oil can be gradually reduced in pressure through the plurality of pressure reducing valves, that is, the cleaning oil is reduced in pressure in multiple stages.

[0036] The first pressure reducing unit 11 and the second pressure reducing unit 12 can be provided with a plurality of first pressure reducing valves 111 and second pressure reducing valves 121, and the cleaning oil can be gradually reduced in pressure through the plurality of pressure reducing valves, that is, the cleaning oil is reduced in pressure in multiple stages.

[0037] The first pressure reducing valve 111 and the second pressure reducing valve 121 are provided with a stop valve at the inlet and outlet, and the stop valve can be a ball valve or a gate valve, etc. The stop valve can facilitate the disassembly of the first pressure reducing valve 111 and the second pressure reducing valve 121, and the stop valve can control the flow direction of the cleaning oil.

[0038] Specifically, the outside of the stop valve is provided with a bypass pipeline, and the bypass pipeline is provided with a bypass valve. When the oil injection system is working normally, the stop valves at the inlet and outlet of the first pressure reducing valve 111 and the second pressure reducing valve 121 are closed and in an open state, and the bypass valve on the bypass pipeline is in a closed state. The cleaning oil flows through the first pressure reducing unit 11 and the second pressure reducing unit 12 through the stop valve. When the first pressure reducing valve 111 or the second pressure reducing valve 121 needs to be disassembled, the stop valves at the inlet and outlet of the first pressure reducing valve 111 and the second pressure reducing valve 121 are closed, and the bypass valve on the bypass pipeline is opened. At this time, the first pressure reducing valve 111 and the second pressure reducing valve 121 do not pass through the cleaning oil, and the cleaning oil flows into the oil injection equipment through the bypass pipeline, which facilitates the disassembly of the first pressure reducing valve 111 or the second pressure reducing valve 121. The stop valve and the bypass valve are arranged to avoid stopping the entire oil injection system to disassemble the pressure reducing valve.

[0039] The first flow channel 112 is fixedly connected with a three-way pipe, that is, the two ports of the three-way pipe in the same direction as the first flow channel 112 are fixedly connected, and the port of the three-way pipe in the other direction is fixedly connected with the second flow channel 122. The connection mode is welding. The cleaning oil in the first flow channel 112 can flow into the second flow channel 122 through the three-way pipe, and then flow into the oil injection equipment through the second flow channel 122.

[0040] In the embodiment of the present application, the cleaning oil enters the oil injection system. As an implementation manner, the cleaning oil flows through the first pressure reducing unit 11 and enters the oil injection equipment through the first flow channel 112. At this time, the stop valve and the bypass valve on the second flow channel in communication with the first flow channel 112 are closed, the cleaning oil does not flow through the second pressure reducing unit 12 and directly enters the oil injection equipment through the first flow channel 112, that is, the cleaning oil is subjected to single-stage pressure reduction through the first pressure reducing unit 11. As another implementation manner, the cleaning oil flows through the first pressure reducing unit 11 and flows into the second pressure reducing unit 12 through the three-way flow, and enters the oil injection equipment through the second flow channel 122. At this time, the stop valve on the second pressure reducing unit 12 is opened and the bypass valve is closed, that is, the cleaning oil is subjected to two-stage pressure reduction through the first pressure reducing unit 11 and the second pressure reducing unit 12. By arranging the first pressure reducing unit 11 and the second pressure reducing unit 12, the pressurized cleaning oil can be subjected to two-stage pressure reduction, the pressure reduction effect is better, the pressure of the cleaning oil is reduced to a pressure preset value matched with the pressure of the oil injection equipment, at the same time, the first flow channel 112 can be selectively connected with the oil injection equipment or the second flow channel 122, the cleaning oil can be switched between single-stage pressure reduction and two-stage pressure reduction, so that different pressure reduction manners of the cleaning oil are adopted in different pressure regions of the oil injection equipment, the differential pressure of the injection nozzle is sufficient, the injection cleaning oil can be completely atomized, the deposits attached to the oil injection equipment are cleaned, the cleaning ability of the cleaning oil to the oil injection equipment is improved, and the oil injection equipment can be kept in normal working condition.

[0041] The oil injection system further comprises a main flow channel 14 and a third flow channel 13, the first flow channel 112 and the third flow channel 13 are connected with the main flow channel 14, and the third flow channel 13 is further connected with the oil injection equipment, so that the oil in the main flow channel 14 can be selectively flowed into the oil injection equipment through the third flow channel 13 or flowed into the first flow channel 112.

[0042] The main flow channel 14 is provided with an inlet stop valve at a position connected with the oil product, and the stop valve is used for manually controlling the start and stop of the oil injection system. In the embodiment of the present application, all stop valves can be ball valves or gate valves.

[0043] The main flow channel 14 is connected with the oil product at one end and is fixedly connected with the three-way joint at the other end, and the connection manner is welding. The three-way joint is connected with the third flow channel 13 and the first flow channel 112, respectively.

[0044] The third flow channel 13 is directly connected with the oil injection equipment, and the cleaning oil can flow into the third flow channel 13 through the main flow channel 14 and directly enter the oil injection equipment without passing through the first pressure reducing unit 11 and the second pressure reducing unit 12, that is, the cleaning oil can directly enter the oil injection equipment through the third flow channel 13 without pressure reduction.

[0045] Specifically, the cleaning oil flows into the main flow channel 14 through the inlet stop valve, as an embodiment, the cleaning oil enters the third flow channel 13 from the main flow channel 14, and directly enters the oil injection equipment through the third flow channel 13, at this time, the stop valve and the bypass valve on the first pressure reducing unit 11 are in the closed state; as another embodiment, the cleaning oil enters the first pressure reducing unit 11 from the main flow channel 14, and can directly enter the oil injection equipment through the first pressure reducing unit 11 or enter the oil injection equipment through the first pressure reducing unit 11 and then the second pressure reducing unit 12, at this time, the valve on the third flow channel 13 is in the closed state.

[0046] In the present application, the third flow channel 13 is provided to make the cleaning oil not pass through the pressure reduction and directly enter the oil injection equipment, when the internal pressure of the oil injection equipment is high, the cleaning oil does not need to be reduced in pressure to achieve complete liquefaction, and the polymer in the oil injection equipment is cleaned. At the same time, through the third flow channel 13, the first pressure reducing unit 11 and the second pressure reducing unit 12, three different cleaning oil pressure reduction modes can be realized, and through the setting of the stop valve, the cleaning oil can be switched between single-stage pressure reduction, double-stage pressure reduction and no pressure reduction, thereby increasing the use range of the oil injection system, so that different pressure reduction modes of the cleaning oil are used in different pressure regions of the oil injection equipment, to ensure that the injection nozzle has enough differential pressure, the cleaning oil can be completely atomized, and the deposits attached to the oil injection equipment can be cleaned, thereby improving the cleaning ability of the cleaning oil to the oil injection equipment, so that the oil injection equipment can operate normally.

[0047] The oil injection system further comprises a first adjusting unit 15, a second adjusting unit 16 and a third adjusting unit 17, the first adjusting unit 15 is arranged on the first flow channel 112, the second adjusting unit 16 is arranged on the second flow channel 122, and the third adjusting unit 17 is arranged on the third flow channel 13.

[0048] The first adjusting unit 15, the second adjusting unit 16 and the third adjusting unit 17 can be one or more in number. In the embodiment of the application, the number of the first adjusting unit 15 is two, the number of the second adjusting unit 16 is six, and the number of the third adjusting unit 17 is two. The first adjusting unit 15 is arranged in series with the first flow channel 112, and the first adjusting units 15 are arranged in parallel with each other. The second adjusting unit 16 is arranged in series with the second flow channel 122, and the second adjusting units 16 are arranged in parallel with each other. The third adjusting unit 17 is arranged in series with the third flow channel 13, and the third adjusting units 17 are arranged in parallel with each other. It can be understood that the first adjusting unit 15, the second adjusting unit 16 and the third adjusting unit 17 are arranged on the branch of the first flow channel 112, the second flow channel 122 and the third flow channel 13, that is, the first adjusting unit 15, the second adjusting unit 16 and the third adjusting unit 17 are arranged on the oil injection branch pipe of the oil injection system, and one adjusting unit is arranged on each oil injection branch pipe. In the embodiment of the application, the number of the oil injection branch pipe is ten.

[0049] The end of the branch of the first flow channel 112, the second flow channel 122 and the third flow channel 13 close to the side of the equipment to be injected is provided with a check valve. The check valve is fixedly connected with the flow channel in a flange connection mode. In the embodiment of the application, the connection mode of all the valves and the flow channel is the flange connection mode, which facilitates the disassembly of the valves. The check valve can prevent the cleaning oil from flowing back to the oil injection system when the oil injection system stops running, so that there is sufficient cleaning oil in the equipment to be injected, and the cleaning effect is improved.

[0050] The first adjusting unit 15, the second adjusting unit 16 and the third adjusting unit 17 each include a needle valve 18 and a pressure reducing hole plate 19.

[0051] The needle valve 18 and the pressure reducing hole plate 19 are arranged in one-to-one correspondence with the oil injection branch pipe and are fixed on the oil injection branch pipe. The needle valve 18 and the pressure reducing hole plate 19 are used to finely adjust the pressure of the cleaning oil, and manually adjust the oil injection pressure to match the pressure in the equipment to be injected.

[0052] In the embodiment of the application, the first adjusting unit 15, the second adjusting unit 16 and the third adjusting unit 17 can finely adjust the oil injection pressure, so that the oil injection pressure matches the pressure of the equipment to be injected, ensures that the injection nozzle has sufficient differential pressure, ensures that the injected cleaning oil is completely atomized, and after being atomized by the nozzle, mixes with the compressed air through the high-speed rotating working wheel, cleans the deposits attached to the working wheel of the equipment to be injected, and keeps the equipment to be injected in normal operating conditions.

[0053] The oil injection system further includes a filtering unit 20 arranged on the main flow channel 14.

[0054] The filtering unit 20 is a pipeline filter, which can be a Y-shaped filter valve, and the filtering unit 20 is arranged in parallel with the main flow channel 14.

[0055] Specifically, a stop valve is fixedly connected to the main flow channel 14, and the stop valve is arranged close to the inlet. The inlet and outlet of the stop valve are fixedly connected to the bypass pipeline through a tee joint. The filtering unit 20 is arranged on the bypass pipeline, and the bypass pipeline is arranged in parallel with the main flow channel 14, that is, the filtering unit 20 is arranged in parallel with the main flow channel 14.

[0056] The filtering unit 20 is a pipeline filter, which can be a Y-shaped filter valve, and the filtering unit 20 is arranged in parallel with the main flow channel 14.

[0057] In the embodiment, the filtering unit 20 can sufficiently filter impurities in the cleaning oil, so that the nozzle is not blocked by too many impurities and cannot inject the cleaning oil into the oil injection equipment. In addition, the filtering unit 20 can also

[0058] The impurities mixed in the cleaning oil can be prevented from entering the oil injection equipment, so that the oil injection equipment is not secondarily scaled. The filtering unit 20 improves the cleaning effect.

[0059] The oil injection system further comprises a detection unit 22, which comprises a first detection device 221, a second

[0060] The detection unit 22 further comprises a third detection device 223. The first detection device 221 is arranged on the main flow channel 140 and detects the differential pressure value of the inlet and outlet of the filtering unit 20.

[0061] The first detection device 221 can be a differential pressure gauge. The first detection device 221 is arranged in parallel with the filtering unit 20 and is fixedly connected to the inlet and outlet of the stop valve arranged in parallel with the filtering unit 20 through an instrument seat.

[0062] Specifically, the number of the first detection device 221 is one. The first detection device 221 is used to display the differential pressure value of the inlet and outlet of the filtering unit 20. When the differential pressure value exceeds a preset range, the filtering unit 20 has too many impurities.

[0063] At this time, the stop valve arranged in parallel with the filtering unit 20 is opened, and the stop valve arranged on the inlet and outlet of the filtering unit 20 is closed. The filter element of the filtering unit 20 is replaced to avoid blockage of the filtering unit 20. In addition, when the filtering unit 20 has too many impurities, the filtering effect is not obvious. The first detection device 221 can be used to observe the differential pressure value of the inlet and outlet of the filtering unit 20.

[0064] When Unit 20 is in operation and there are many impurities, the filter element should be replaced in time to avoid insufficient oil supply in the oiling system and improve the cleaning effect of the cleaning oil on the oiling equipment.

[0065] The second detection device 222 and the third detection device 223 are both installed on the first flow channel 112, the second flow channel 122 and the third flow channel 13, respectively, and are used to detect the oil injection pressure and oil injection volume of the oil injection system.

[0066] The second detection device 222 can be a pressure gauge. The second detection device 222 is used to detect the oil injection pressure in the oil injection system 5. The second detection device 222 is installed in the first flow channel 112 and the second flow channel 112.

[0067] On channel 122 and the third flow channel 13, the second detection device 222 is installed on the oil injection branch pipe and connected in series with the oil injection branch pipe. The second detection device 222 is fixedly connected to the oil injection branch pipe through the instrument base.

[0068] Specifically, the second detection device 222 is installed in a one-to-one correspondence with the oil injection branch pipe.

[0069] The number of devices is ten. The second detection device 222 is used to detect the pressure of the cleaning oil in each oil injection branch pipe. By observing the reading of the second detection device 222, it is determined whether the oil injection pressure matches the pressure in the equipment to be oiled. If they do not match, the first pressure reducing valve 111 and the second pressure reducing valve 121 are adjusted to ensure that the oil injection nozzle has sufficient differential pressure and that the sprayed cleaning oil is completely atomized. The working status of the oil injection system can be determined by the second detection device 222, and adjustments can be made in a timely manner according to the reading of the second detection device 222 to ensure that the sprayed cleaning oil is completely atomized and to clean away the deposits attached to the working wheel of the equipment to be oiled, so that the equipment to be oiled can maintain normal operating conditions.

[0070] The third detection device 223 can be a flow meter. The third detection device 223 is used to detect the amount of oil injected in the oil injection system. The third detection device 223 is connected to the first flow channel 112, the second flow channel 122 and the third flow channel 13. That is, the third detection device 223 is set on the oil injection branch pipe and connected in series with the oil injection branch pipe. The third detection device 223 is fixedly connected to the oil injection branch pipe through the instrument base.

[0071] Specifically, the third detection device 223 is arranged in one-to-one correspondence with the oil injection branch pipe, the number of the third detection device 223 is ten, and the third detection device 223 is used to detect the oil injection amount in the oil injection system. Whether the oil injection amount in the oil injection system is sufficient to completely dissolve the polymer in the oil injection equipment is determined by observing the indication of the third detection device 223. When the oil injection amount in the oil injection system is insufficient, the opening degree of the inlet stop valve is adjusted to increase the oil injection amount in the oil injection system, so that the polymer in the oil injection equipment can be completely dissolved in the cleaning oil to clean the deposits attached to the working wheel of the oil injection equipment, and the oil injection equipment can keep normal operating conditions.

[0072] In the embodiment of the application, the first detection device 221 is arranged to detect the differential pressure value of the inlet and outlet of the filter unit 20. When the differential pressure value exceeds the preset range, the filter element of the filter unit 20 is replaced in time to avoid the filter unit 20 from being blocked, to ensure that the oil injection system has sufficient oil injection amount, to improve the cleaning effect of the cleaning oil on the oil injection equipment, and to detect the oil injection pressure and the oil injection amount of the oil injection system by arranging the second detection device 222 and the third detection device 223. The second detection device 222 and the third detection device 223 are used to determine the working state of the oil injection system, and the first pressure reducing valve 111, the second pressure reducing valve 121 and the opening degree of the inlet stop valve are adjusted in time according to the readings of the second detection device 222 and the third detection device 223 to ensure that the injected cleaning oil is completely atomized, and the cleaning oil can completely dissolve the polymer in the oil injection equipment to clean the deposits attached to the working wheel of the oil injection equipment, so that the oil injection equipment can keep normal operating conditions.

[0073] The oil injection system further comprises a control valve 21 arranged on the main flow channel 14.

[0074] The control valve 21 can be a pneumatic cut-off valve arranged on the outlet channel of the filter unit 20 and fixedly connected with the main flow channel. The pneumatic cut-off valve can be used to control the rapid start and stop of the oil injection system.

[0075] The control valve 21 further comprises a limit switch and an upper computer, and the limit switch is electrically connected with the upper computer. The upper computer controls the start and stop of the oil injection system through the limit switch.

[0076] Specifically, the pneumatic cut-off valve can quickly cut off the main flow channel 14, the limit switch can feed back the on-off state of the pneumatic cut-off valve to the upper computer, the upper computer can transmit the on-off signal to the limit switch according to the on-off state of the pneumatic cut-off valve to control the working state of the pneumatic cut-off valve, and the working personnel can observe the working state of the oil injection system through the upper computer. The upper computer can be used to realize remote control of the continuous work or intermittent work of the oil injection system, to realize automatic control of the oil injection system, and to facilitate the operation of the working personnel.

[0077] In the embodiment of the present application, the control valve 21 is arranged to realize automatic control of the oil injection system. The limit switch is arranged to adjust the opening of the pneumatic cut-off valve, thereby adjusting the oil injection amount of the oil injection system. The oil injection system can realize continuous operation or intermittent operation according to actual requirements, improve the utilization rate of energy, and ensure sufficient oil injection amount of the oil injection system, thereby improving the cleaning effect.

[0078] The oil injection system further comprises a safety unit 23 arranged on the main flow channel 14. The safety unit 23 is used to discharge the oil outside the oil injection system when the oil injection pressure in the oil injection system exceeds a pressure threshold.

[0079] The safety unit 23 can be a safety valve. The safety unit 23 is arranged at the upper part of the outlet flow channel of the control valve 21. The safety unit 23 is fixedly connected to the main flow channel 14 through a tee joint.

[0080] The safety unit 23 further comprises a safety pipeline fixedly connected to the safety valve. When the oil injection pressure in the oil injection system exceeds the pressure threshold, the safety unit 23 is automatically opened, and the cleaning oil is discharged through the safety pipeline.

[0081] Specifically, the safety unit 23 is arranged with a take-off pressure. As an embodiment, the take-off pressure can be the minimum value of the maximum bearing pressure of each component in the oil injection system. As another embodiment, the take-off pressure can be the minimum value of the maximum bearing pressure of each flow channel in the oil injection system. When the oil injection pressure in the oil injection system exceeds the take-off pressure, the safety unit 23 is opened, and the cleaning oil is discharged outside the oil injection system.

[0082] In the embodiment of the present application, the safety unit 23 is arranged. When the oil injection pressure in the oil injection system exceeds the pressure threshold, the cleaning oil is discharged outside the oil injection system, thereby avoiding damage to the components of the oil injection system and cleaning oil leakage. Meanwhile, the damaged components are prevented from hitting the workers, thereby improving the safety of operation.

[0083] The oil injection system further comprises a discharge unit 24 arranged on the first flow channel 112 and the second flow channel 122. The discharge unit 24 is used to discharge the residual oil in the oil injection system when the oil injection system stops running.

[0084] The discharge unit 24 can be a discharge channel. In the embodiment of the present application, two discharge units 24 are arranged. The first discharge unit 24 is arranged on the outlet channel of the first pressure reducing valve 111 and is fixedly connected to the first flow channel 112. The second discharge unit 24 is arranged on the outlet channel of the second pressure reducing valve 121 and is fixedly connected to the second flow channel 122. The discharge unit 24 is used to discharge the cleaning oil in the oil injection system.

[0085] The discharge unit 24 further comprises a discharge valve fixedly connected with the discharge channel, and the discharge valve controls the opening and closing of the discharge channel.

[0086] In the embodiment, the discharge unit 24 can discharge the cleaning oil in the oil injection system, and the oil injection system can be replaced with the cleaning oil, so that the oil injection system can be applied to various oil injection equipment for oil injection operation, and the application range of the oil injection system is improved. In winter, the cleaning oil in the oil injection system is discharged after the oil injection system is operated, so as to avoid the freezing of the cleaning oil due to the low temperature, and the freezing of the flow channel of the oil injection system. In addition, the oil injection system can be conveniently used again.

[0087] The oil injection system further comprises a base 25 and a support 26, the base 25 is fixedly connected with the support 26, and the base 25 and the support 26 are fixedly connected with the oil injection system.

[0088] The base 25 can be rectangular, and the base 25 can be horizontally arranged. The support 26 can be rectangular, and the support 26 is arranged perpendicularly to the base 25. The support 26 is fixedly connected with the base 25 on the side close to the base 25, and the connection mode can be riveting or bolt connection, which is not limited in the present application.

[0089] The base 25 is fixedly connected with the oil injection system, the flow channel of the oil injection system is fixed on the base 25 through a U-shaped pipe clamp, the base 25 can be made of channel steel and diamond plate, and the base 25 is provided with lifting lugs, oil discharge holes and foot holes. The lifting lugs are passed through the lifting lugs to facilitate the lifting of the base 25. The discharge unit 24 is passed through the oil discharge holes to discharge the cleaning oil from the oil injection system. The foot bolts are passed through the foot holes to fix the base 25 on the ground. The base 25 provides a stable installation position for the oil injection system in the horizontal direction.

[0090] The support 26 is fixedly connected with the oil injection system, the flow channel of the oil injection system is fixedly connected with the support 26 through a U-shaped pipe clamp, and other components of the oil injection system are also fixedly connected with the support 26, such as the first detection device 221 and the second detection device 222. The connection mode can be bolt connection. The support 26 provides a stable installation position for the oil injection system in the vertical direction.

[0091] Specifically, the main flow channel 14, the first flow channel 112 main pipe, the second flow channel 122 main pipe and the third flow channel 13 main pipe are horizontally arranged and fixedly connected with the base 25 through a U-shaped pipe clamp. The first flow channel 112 branch pipe, the second flow channel 122 branch pipe and the third flow channel 13 branch pipe are vertically arranged and fixedly connected with the support 26 through a U-shaped pipe clamp, and the connection mode is bolt connection. It can be understood that the support 26 is also fixedly connected with other components such as the first detection device 221 and the second detection device 222.

[0092] In the embodiment of the application, the base 25 and the support 26 are arranged to provide a stable mounting position for the oil injection system in the horizontal direction and the vertical direction, avoid vibration of the flow channel during operation of the oil injection system, improve the stability of the oil injection system, reduce the floor area occupied by the oil injection system, and facilitate operation of the oil injection system by the staff.

[0093] In another aspect, the embodiment of the application provides a compressor unit, which comprises the oil injection system as described above.

[0094] The oil injection system is arranged to inject cleaning oil into the compressor.

[0095] Specifically, as an implementation, the oil injection system can inject cleaning oil into the compressor, and the cleaning oil is completely atomized by the nozzle and mixed with the compressed air to pass through the high-speed rotating working wheel, so that the deposits adhered to the working wheel are cleaned, and the compressor can be kept in normal operation; as another implementation, the oil injection system can inject lubricating oil into the compressor, and the lubricating oil can effectively reduce the high-frequency noise generated during the compression of the compressor, and form an oil film on the surface of the working wheel to prevent polymers from adhering to the working wheel and the compressor from being scaled.

[0096] The oil injection system is arranged to inject cleaning oil into the compressor.

[0097] It is easy for those skilled in the art to understand that the above advantageous modes can be freely combined and superimposed without conflict.

[0098] The above is only a preferred embodiment of the application, and is not intended to limit the application. Any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the application. The above is only a preferred embodiment of the application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the application, a number of improvements and modifications can be made, and these improvements and modifications shall be regarded as the protection scope of the application.

Claims

1. An oil injection system, characterized in that, The system is used to inject oil into a device to be injected. The oil injection system includes a pressure reducing unit, which includes a first pressure reducing unit (11) and a second pressure reducing unit (12). The first pressure reducing unit (11) includes a first pressure reducing valve (111) and a first flow channel (112). The second pressure reducing unit (12) includes a second pressure reducing valve (121) and a second flow channel (122). The first pressure reducing valve (111) is disposed on the first flow channel (112), and the second pressure reducing valve (121) is disposed on the second flow channel (122). The first flow channel (112) can be selectively connected to the device to be injected or the second flow channel (122) so that the oil can flow into the device to be injected via the first flow channel (112) or flow into the device to be injected via the first flow channel (112) and the second flow channel (122). The oil injection system further includes a main flow channel (14) and a third flow channel (13). The first flow channel (112) and the third flow channel (13) are respectively connected to the main flow channel (14). The third flow channel (13) is also connected to the equipment to be injected, so that the oil in the main flow channel (14) can selectively flow into the equipment to be injected or into the first flow channel (112) through the third flow channel (13). The oil injection system further includes a first adjustment unit (15), a second adjustment unit (16) and a third adjustment unit (17). The first adjustment unit (15) is disposed on the first flow channel (112), the second adjustment unit (16) is disposed on the second flow channel (122), and the third adjustment unit (17) is disposed on the third flow channel (13). The first adjustment unit (15), the second adjustment unit (16) and the third adjustment unit (17) all include a needle valve (18) and a pressure reducing orifice plate (19); The oil injection system also includes a safety unit (23), which is disposed on the main flow channel (14). The safety unit (23) is used to discharge oil outside the oil injection system when the oil injection pressure in the oil injection system exceeds a preset pressure threshold. The oil injection system further includes a discharge unit (24), which is disposed on the first flow channel (112) and the second flow channel (122). The discharge unit (24) is used to discharge the residual oil in the oil injection system when the oil injection system stops operating.

2. The oil injection system according to claim 1, characterized in that, The oil injection system also includes a filter unit (20), which is disposed on the main flow channel (14).

3. The oil injection system according to claim 2, characterized in that, The oil injection system also includes a detection unit (22), which includes a first detection device (221), a second detection device (222) and a third detection device (223). The first detection device (221) is installed on the main flow channel (14) and is used to detect the differential pressure value at the inlet and outlet of the filter unit (20). The second detection device (222) and the third detection device (223) are both installed on the first flow channel (112), the second flow channel (122) and the third flow channel (13), respectively. The second detection device (222) and the third detection device (223) are used to detect the oil injection pressure and oil injection volume of the oil injection system.

4. The oil injection system according to claim 1, characterized in that, The oil injection system also includes a control valve (21), which is disposed on the main flow channel (14).

5. The oil injection system according to claim 1, characterized in that, The oil injection system also includes a base (25) and a bracket (26), the base (25) and the bracket (26) being fixedly connected, and the base (25) and the bracket (26) being fixedly connected to the oil injection system.

6. A compressor unit, characterized in that, The compressor unit includes the oil injection system as described in any one of claims 1-5.

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