Water-injected screw air compressor

Abstract

The application discloses a water-jet screw air compressor and relates to the field of air compression.The water-jet screw air compressor comprises a box body, a power assembly, an air inlet assembly, a circulating system and an air outlet assembly, a driving motor in the power assembly is transmissionally connected with a main machine, the air inlet assembly is connected with an air inlet of the main machine, the water circulating system comprises a water inlet pipeline, a water supplement pipeline and a cooling assembly, the water inlet pipeline is connected with the cooling assembly, a first filter is arranged on the water inlet pipeline, a temperature sensor is arranged on the water inlet pipeline, the water inlet pipeline is connected with the water supplement pipeline through a circulating pipe, and a first one-way valve is arranged on the circulating pipe, and the air outlet assembly comprises a horizontal water-gas barrel;the horizontal water-gas barrel is adopted to replace a vertical water-gas barrel, the structure of the water-gas barrel is simplified, the water-gas separation efficiency is improved, the backflow of compressed gas can be avoided, the air exhaust capacity and the air exhaust efficiency of the compressed gas are ensured, the overall structure is compact and reliable, the manufacturing cost is low, the working efficiency is high, the operation is stable, and the comprehensive performance of the air compressor is improved.

Description

Technical Field

[0001] This invention relates to the field of air compression technology, and in particular to a water-jet screw air compressor. Background Technology

[0002] For a long time, oil-lubricated screw air compressors have dominated the market. Oil plays a lubricating role in the compressor, reducing friction between the rotor and bearings, reducing leakage at the rotor meshing clearance, improving volumetric efficiency, absorbing the heat generated during the compression process, lowering the exhaust temperature, and providing noise suppression and corrosion protection. However, oil lubrication technology has obvious drawbacks in some situations, such as issues with oil content in the air, complex after-treatment, and environmental pollution risks. To solve the problem of oil pollution, oil-free screw air compressors have emerged.

[0003] A water-lubricated screw air compressor is a single-stage twin-screw positive displacement compressor that uses water instead of oil as the lubricating and cooling medium. It works by having a pair of meshing screws (male and female rotors) rotate at high speed within the compressor housing, continuously compressing the intake air and delivering it to the system. Compared to traditional oil-lubricated screw compressors, the biggest advantage of a water-lubricated screw air compressor is that it does not use lubricating oil; instead, it injects pure water into the compression process. The water plays multiple roles in the compressor cavity, including sealing, cooling, lubrication, and noise reduction. The compressed air is oil-free and clean, making it suitable for applications with high air quality requirements, such as food, pharmaceutical, and electronics industries.

[0004] Chinese patent application CN201320222510.4 discloses an energy-saving and environmentally friendly variable frequency oil-free water-lubricated screw air compressor, which includes a chassis. Inside the chassis, there is a fully stainless steel water-lubricated single main unit driven by a motor, a water-air separator, and a water cooler. The water inlet of the fully stainless steel water-lubricated single main unit is connected to the water outlet of the water-air separator via an inlet pipe. The water outlet of the fully stainless steel water-lubricated single main unit is connected to the water inlet of the water cooler via an outlet pipe. The water outlet of the water cooler is connected to the return port of the water-air separator via a return pipe. The motor is automatically speed-regulated by a frequency converter. Both the motor and the frequency converter are controlled by an intelligent computer controller. In this structure, a water-air separator, a water cooler, and a main unit are connected in a circular manner to achieve the recycling of water. The water-air separator is a vertical structure. The water-air mixture entering the water-air tank rotates along the inner wall to generate centrifugal force, achieving preliminary separation of water droplets and air. This structure relies on gravity and a rotating flow field, and the separation efficiency is greatly affected by the inlet flow rate and rotation speed. It is difficult to ensure efficient separation under high pressure and high flow rate conditions. Moreover, directly connecting the water-air separator to the air compressor allows for the recycling of water, but the air in the water-air separator will also repeatedly flow into the air compressor, reducing the exhaust volume and the working efficiency of the air compressor. Therefore, this invention discloses a water-spray screw air compressor to solve the above problems. Summary of the Invention

[0005] Therefore, it is necessary to address the aforementioned technical problems by providing a water-jet screw air compressor that uses a horizontal water-air tank instead of a vertical one. This simplifies the tank structure, makes it easier to manufacture, and reduces costs. It eliminates the need for rotary separation of the water-air mixture, improving water-air separation efficiency under high pressure and high flow rate conditions. Furthermore, the independent water circulation system prevents compressed gas backflow, ensuring sufficient exhaust volume and efficiency. The overall structure is compact and reliable, with low manufacturing costs, high working efficiency, and stable operation, thus improving the overall performance of the air compressor.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A water-spraying screw air compressor includes a housing.

[0008] A power assembly, comprising a drive motor and a main unit, wherein the drive motor is connected to the main unit in a driving relationship;

[0009] The air intake assembly, which is connected to the air intake of the main unit, is used to inject air into the main unit;

[0010] A water circulation system includes an inlet pipe, a replenishment pipe, and a cooling assembly. The inlet pipe is connected to the cooling assembly and is equipped with a first filter. The replenishment pipe is connected to the main unit and is equipped with a temperature sensor. The inlet pipe and the replenishment pipe are connected through a circulation pipe and are equipped with a first one-way valve.

[0011] The exhaust assembly includes a horizontal water-air tank. The air outlet of the main unit is connected to the horizontal water-air tank through an air outlet pipe. The bottom end of the horizontal water-air tank is connected to a cooling assembly through a water-cooling pipe. An exhaust pipe is provided at the end of the horizontal water-air tank away from the air outlet pipe. The exhaust pipe extends outside the housing. An automatic drain valve is provided on the horizontal water-air tank.

[0012] In a preferred embodiment of the water-spraying screw air compressor provided by the present invention, the power assembly and the exhaust assembly are arranged side by side, and the air intake assembly is located above the power assembly. The water inlet pipe and the water replenishment pipe in the water circulation system are located between the power assembly and the exhaust assembly, and the cooling assembly is located at the top of the housing.

[0013] In a preferred embodiment of the water-spraying screw air compressor provided by the present invention, the cooling assembly includes a cooler and a cooling fan. The cooling fan is located above the cooler and communicates with the outside of the housing. An exhaust fan is provided on one side of the upper end of the housing.

[0014] In a preferred embodiment of the water-spraying screw air compressor provided by the present invention, the water inlet pipeline includes a first branch block, which is connected to a plurality of water inlet branch pipes. The temperature sensor is disposed on the first branch block, and a main water inlet pipe is connected to the first branch block. The main water inlet pipe is connected to the outlet of the cooling component through a first filter. The first branch block is also provided with an external drain pipe, which is provided with a manual valve and extends to the outside of the housing.

[0015] In a preferred embodiment of the water-spraying screw air compressor provided by the present invention, the water supply pipeline includes an internal pressure balancing block and a second diversion block. The internal pressure balancing block is equipped with a pressure sensor and several water pressure balancing pipes. The water pressure balancing pipes are connected to the main unit. The internal pressure balancing block and the first diversion block are connected through a circulation pipe. The internal pressure balancing block is connected to the second diversion block through an intermediate pipe. The second diversion block is connected to the main water supply pipe. The main water supply pipe is equipped with multiple second filters, and the main water inlet pipe extends outside the casing.

[0016] In a preferred embodiment of the water-spraying screw air compressor provided by the present invention, the air intake assembly includes an air filter assembly, which is connected to the air intake port of the main unit through an air intake pipe. The second diverter block is connected to the air intake pipe through two air intake water supply pipes, and the two air intake water supply pipes are controlled by a normally closed solenoid valve and a manual valve, respectively. The second diverter block is connected to a horizontal water-air tank through a water-air tank water supply pipe, and a second one-way valve is provided on the water-air tank water supply pipe.

[0017] In a preferred embodiment of the water-spraying screw air compressor provided by the present invention, a vent valve is provided on the air inlet pipe, the vent valve is connected to a horizontal water-air tank through a vent pipe, the exhaust pipe is connected to the vent valve through a return air pipe, and a gas-water separator and a return air solenoid valve are provided on the return air pipe.

[0018] In a preferred embodiment of the water-spraying screw air compressor provided by the present invention, the upper end and the bottom end of the horizontal water-air tank are connected by an arc-shaped pipe, the arc-shaped pipe is arranged around the outside of the horizontal water-air tank, and the bottom of the horizontal water-air tank is provided with a drain pipe with a manual valve, the drain pipe extending out of the housing.

[0019] In a preferred embodiment of the water-spraying screw air compressor provided by the present invention, an L-shaped baffle is provided inside the horizontal water-air tank. The L-shaped baffle is located at the connection position between the air outlet pipe, the exhaust pipe and the horizontal water-air tank, and the two L-shaped baffles are symmetrically arranged.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The water-jet screw air compressor provided by this invention uses a horizontal water-air tank instead of a vertical one, simplifying the tank structure, making it easier to manufacture and lowering the cost. It eliminates the need for rotary separation of the water-air mixture, improving water-air separation efficiency under high pressure and high flow rate conditions. Furthermore, the independent water circulation system prevents backflow of compressed gas, ensuring sufficient exhaust volume and efficiency. The overall structure is compact and reliable, with low manufacturing costs, high working efficiency, and stable operation, thus improving the overall performance of the air compressor. Attached Figure Description

[0022] To more clearly illustrate the solutions in this invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is an external schematic diagram of the overall structure of the water-jet screw air compressor provided by the present invention.

[0024] Figure 2 This is a schematic diagram of the internal structure of the water-jet screw air compressor provided by the present invention.

[0025] Figure 3 A three-dimensional schematic diagram of the internal structure of the water-jet screw air compressor provided by the present invention;

[0026] Figure 4 for Figure 3 Another perspective 3D illustration;

[0027] Figure 5 This is a schematic diagram showing the connection between the power component and the water circulation system in the water-jet screw air compressor provided by the present invention.

[0028] Figure 6 for Figure 5 Another perspective 3D illustration;

[0029] Figure 7 This is a three-dimensional schematic diagram of the water circulation system in the water-spraying screw air compressor provided by the present invention;

[0030] Figure 8 This is a three-dimensional schematic diagram of the exhaust assembly in the water-spray screw air compressor provided by the present invention;

[0031] Figure 9 This is a plan view of the exhaust assembly in the water-spraying screw air compressor provided by the present invention;

[0032] Figure 10 for Figure 9 A three-dimensional diagram from another perspective.

[0033] The markings in the diagram are explained as follows:

[0034] 1. Housing; 11. Base; 12. Top Mount; 13. Column; 14. Frequency Converter; 2. Power Components; 21. Drive Motor; 22. Main Unit; 23. Coupling; 24. Exhaust Pipe; 3. Intake Components; 31. Air Filter Assembly; 32. Intake Pipe; 33. Relief Valve; 34. Relief Pipe; 35. Return Air Pipe; 36. Air-Water Separator; 37. Return Air Solenoid Valve; 4. Water Circulation System; 41. Water Inlet Pipe; 411. First Diverter Block; 412. Water Inlet Branch Pipe; 413. Main Water Inlet Pipe; 414. External Drain Pipe; 42. Water Replenishment Pipe; 421. Internal Pressure Balance Block; 422. Pressure Sensor; 423. Water Pressure Balance Pipe; 424, Intermediate pipe; 425, Second branch block; 426, Main water supply pipe; 427, Second filter; 428, Air inlet water supply pipe; 429, Water tank water supply pipe; 43, Cooling assembly; 431, Cooler; 432, Radiator fan; 433, Exhaust fan; 44, First filter; 45, Temperature sensor; 46, Circulation pipe; 47, First check valve; 5, Exhaust assembly; 51, Horizontal water tank; 52, Water-cooled pipe; 53, Exhaust pipe; 54, Automatic drain valve; 55, Automatic drain pipe; 57, Arc-shaped pipe; 58, Drain pipe; 59, L-shaped baffle; 510, Safety valve; 511, Pressure gauge. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0036] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0037] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] Please refer to Figure 1 , Figure 2A water-spraying screw air compressor is provided, which includes a housing 1, a power component 2, an intake component 3, a water circulation system 4, and an exhaust component 5. The housing 1 is a sheet metal structure assembled from components such as welding and hinges. Specifically, the housing 1 includes a base 11 and a top seat 12. Columns 13 are provided at the four corners between the base 11 and the top seat 12. Door panels, louvers, and other structures are provided between the columns 13 using hinges or welding processes. The housing 1 is designed independently according to actual size specifications. The housing 1 contains brackets, shock-absorbing structures, and other components for fixing the power component 2, intake component 3, water circulation system 4, and exhaust component 5, which can be designed independently.

[0040] like Figures 2-4 As shown, the power assembly 2 is located on one side of the bottom of the housing 1. The exhaust assembly 5 is arranged side by side with the power assembly 2. The intake assembly 3 is fixed above the power assembly 2. The water inlet pipe 41 and the water replenishment pipe 42 in the water circulation system 4 are located between the power assembly 2 and the exhaust assembly 5. Specifically, the power assembly 2 includes a drive motor 21 and a main unit 22. The drive motor 21 is connected to the main unit 22 by a coupling 23. The main unit 22 is a twin-screw water-lubricated 37kW main unit. Both the main unit 22 and the drive motor 21 are fixed to the bottom of the housing 1 by shock-absorbing pads. An electrical control room is located on one side of the interior of the body 1. The electrical control room is equipped with a frequency converter 14 and a control system. The frequency converter 14 is used to control the speed change of the drive motor 21, and the control system is used to control all electrical appliances used in the entire air compressor. The air intake assembly 3 includes an air filter assembly 31. The air filter assembly 31 is connected to the air intake port of the main unit 22 through the air intake pipe 32. The air filter assembly 31 injects filtered air into the main unit 22. At the same time, the air filter assembly 31 is fixed on the drive motor 21 by a bracket. The three-dimensional arrangement saves the planar area and optimizes the utilization rate of the internal space of the housing 1.

[0041] like Figures 3-7As shown, the water circulation system 4 is used to supply water to the main unit 22. Specifically, the water circulation system 4 includes an inlet pipe 41, a replenishment pipe 42, and a cooling assembly 43. The inlet pipe 41 is connected to the cooling assembly 43 and is equipped with a first filter 44. The replenishment pipe 42 is connected to the main unit 22 and is equipped with a temperature sensor 45. The inlet pipe 41 and the replenishment pipe 42 are connected through a circulation pipe 46 and are equipped with a first one-way valve 47. The liquid water cooled by the cooling assembly 43 flows into the main unit 22 through the inlet pipe 41, thus cooling the main unit 22. For lubrication and cooling, compressed air forms a gas-water mixture when the host 22 is working. Temperature sensor 45 monitors the water temperature of the liquid water injected into the host 22 in real time. In this embodiment, the cooling component 43 includes a cooler 431 and a cooling fan 432. The cooling fan 432 is located above the cooler 431 and communicates with the outside of the housing 1. An exhaust fan 433 is provided on one side of the upper end of the housing 1. The cooling fan 432 dissipates the heat generated by the cooler 431 in a timely manner, while the operation of the exhaust fan 433 can maintain airflow inside the housing 1 and prevent high temperatures inside the housing 1 from affecting the operation.

[0042] like Figures 5-7 As shown, in this embodiment, the water inlet pipe 41 includes a first branch block 411, which is connected to three water inlet branch pipes 412. The three water inlet branch pipes 412 are connected to the main unit 22 from different directions. A temperature sensor 45 is installed on the first branch block 411. A main water inlet pipe 413 is connected to the first branch block 411. The main water inlet pipe 413 is connected to the outlet of the cooler 431 through a first filter 44. During the operation of the main unit 22, the cooled liquid water... After being filtered by the first filter 44, the water enters the first diversion block 411 through the main inlet pipe 413 and is injected into the main unit 22 through the inlet branch pipe 412. When the pressure in the main unit 22 is too high, the liquid water flows directly into the water replenishment pipe 42 through the circulation pipe 46 to balance the pressure. In addition, the first diversion block 411 is also equipped with an external drain pipe 414, which is equipped with a manual valve and extends to the outside of the housing 1 for external drainage. This can quickly relieve the pressure when it is too high.

[0043] like Figure 7As shown, in this embodiment, the water supply pipe 42 includes an internal pressure balancing block 421 and a second diversion block 425. The internal pressure balancing block 421 is equipped with a pressure sensor 422, which can monitor the internal pressure of the main unit 22 in real time and release pressure promptly when it is too high, thus stabilizing the internal pressure of the main unit 22. The internal pressure balancing block 421 is equipped with two water pressure balancing pipes 423, which are connected to the main unit 22. The internal pressure balancing block 421 and the first diversion block 411... The two are connected by a circulation pipe 46. The first one-way valve 47 on the circulation pipe 46 ensures that the liquid water in the first diversion block 411 can flow smoothly into the internal pressure balance block 421. The internal pressure balance block 421 is connected to the second diversion block 425 through the intermediate pipe 424. The second diversion block 425 is connected to the water supply main pipe 426. The water supply main pipe 426 is equipped with three second filters 427 and extends outside the box 1. The water supply main pipe 426 is connected to the external water source for water supply.

[0044] like Figure 7 As shown, the second diversion block 425 is further connected to the air intake pipe 32 via two air intake water supply pipes 428, and the two air intake water supply pipes 428 are controlled by a normally closed solenoid valve and a manual valve, respectively. The air intake water supply pipe 428 of the normally closed solenoid valve serves as a backup water pipe. During water lubrication, the liquid water input through the air intake water supply pipe 428 connected to the second diversion block 425 enters the main unit 22 together with the air entering through the air intake pipe 32 to replenish the liquid water inside the main unit 22. At the same time, the second diversion block 425 is connected to the horizontal water and air tank 51 via the water and air tank water supply pipe 429, and the water and air tank water supply pipe 429 is equipped with a second one-way valve. When the pressure inside the main unit 22 is too high, the second diversion block 425 diverts the liquid water into the horizontal water and air tank 51 to relieve the pressure inside the main unit 22. In this invention, the term 'block' (such as the first diversion block, the second diversion block, or the internal pressure balance block) refers to an integrated component with internal flow channels for fluid distribution or connection, and can also be understood as a manifold, pipe, or connecting block.

[0045] like Figure 4 As shown, the intake pipe 32 is further equipped with a relief valve 33, which is connected to the horizontal water-air tank 51 through a relief pipe 34. The exhaust pipe 53 is connected to the relief valve 33 through a return pipe 35. The return pipe 35 is equipped with a gas-water separator 36 and a return solenoid valve 37. The return pipe 35 is connected to the exhaust pipe 53. When the pressure inside the main unit 22 or the horizontal water-air tank 51 is too high, the compressed gas can be discharged directly into the horizontal water-air tank 51 through the relief pipe 34. At the same time, the compressed air can be separated into gas and liquid through the return pipe 35 and discharged directly from the exhaust pipe 53 to relieve the internal pressure of the main unit 22.

[0046] like Figures 8-10As shown, in this embodiment, the exhaust assembly 5 includes a horizontal water-air tank 51. The horizontal water-air tank 51 is made with a simple structure of a horizontal barrel with end caps at both ends, which is low in cost. The horizontal water-air tank 51 is fixed to the bottom of the housing 1 by a stand. One end of the horizontal water-air tank 51 is connected to the outlet of the main unit 22 through an outlet pipe 24. The inlet end of the cooler 431 is connected to the water inlet pipe 41, and the outlet end of the cooler 431 is connected to the water cooling pipe 52. The water cooling pipe 52 is connected to the bottom end of the horizontal water-air tank 51. The water cooling pipe 52 injects high-temperature water into the cooler 431 for cooling to ensure the horizontal water-air tank 51 is kept cool. The liquid water inside is kept at a low temperature to ensure that the water-air mixture can be quickly separated after entering the horizontal water-air tank. The end of the horizontal water-air tank 51 away from the air outlet pipe 24 is provided with an exhaust pipe 53, which extends outside the tank body 1 for connecting to an external air outlet device. An automatic drain valve 54 is provided on the horizontal water-air tank 51. The automatic drain valve 54 is installed on the automatic drain pipe 55, which extends outside the tank body 1. After the liquid level in the horizontal water-air tank 51 rises to the threshold, the liquid water is automatically discharged from the automatic drain pipe 55 to achieve automatic drainage, so as to ensure that the liquid water in the horizontal water-air tank 51 is always at the designed liquid level.

[0047] like Figure 8 As shown, the upper and lower ends of the horizontal water-air tank 51 are connected by an arc-shaped pipe 57. The arc-shaped pipe 57 is arranged around the outside of the horizontal water-air tank 51 and is made of transparent material to facilitate observation of the liquid level inside the horizontal water-air tank 51. In addition, the bottom of the horizontal water-air tank 51 is provided with a drain pipe 58 with a manual valve. The drain pipe 58 extends outside the tank 1 and is used to drain the liquid water inside the horizontal water-air tank 51, which is convenient for cleaning the horizontal water-air tank 51. Of course, the drain pipe 58 can also be used to quickly replenish water.

[0048] like Figure 10As shown, the horizontal water-air tank 51 is further provided with an L-shaped baffle 59. The L-shaped baffle 59 is located at the connection position between the air outlet pipe 24, the exhaust pipe 53 and the horizontal water-air tank 51, and the two L-shaped baffles 59 are symmetrically arranged. The L-shaped baffle 59 seals the inner upper arc surface of the horizontal water-air tank 51, and the horizontal plate of the L-shaped baffle 59 faces both ends of the horizontal water-air tank 51. After the compressed air enters the horizontal water-air tank 51 from the air outlet pipe 24, the air-water mixture in the compressed air enters the horizontal water-air tank 51 and impacts the L-shaped baffle 59, which increases the water-air separation effect and avoids direct impact on the liquid surface, causing obvious water level fluctuations. When the compressed air is discharged, the L-shaped baffle 59 can play a guiding role and also has a part of the separation effect. Therefore, the setting of the L-shaped baffle 59 can play the role of collision separation and avoid direct impact on the internal liquid level. Meanwhile, a safety valve 510 is also installed on the top of the horizontal water-gas tank 51. An L-shaped baffle 59 is also installed inside the horizontal water-gas tank 51 at the position of the safety valve 510. Similarly, a pressure gauge 511 is also installed at the top of the horizontal water-gas tank 51 to display the pressure value inside the horizontal water-gas tank 51 in real time.

[0049] The working principle of the water-spray screw air compressor provided by this invention is as follows: the air filter assembly 31 inputs filtered air into the main unit 22 through the air inlet pipe 32, and the water supply pipe 42 injects lubricating water into the main unit 22. After the drive motor 21 starts, it drives the main unit 22 to compress the air. The compressed air-water mixture is input into the horizontal water-air tank 51 through the air outlet pipe 24. The air-water mixture flows laterally through the horizontal water-air tank 51, which extends the flow path of the air-water mixture. Under the action of gravity, water-air separation is achieved. The compressed gas at the separation point is discharged from the exhaust pipe 53. The use of the horizontal water-air tank 51 instead of the vertical water-air tank simplifies the structure of the water-air tank, makes it simple to manufacture, and has a low cost. It does not require rotation to separate the water-air mixture, which improves the water-air separation efficiency under high pressure and high flow rate conditions. Moreover, the use of an independent water circulation system 4 can avoid the backflow of compressed gas, ensuring the exhaust volume and exhaust efficiency of compressed gas. The overall structure is compact and reliable, with low manufacturing cost, high working efficiency, and stable operation, which improves the comprehensive performance of the air compressor.

[0050] In this invention, unless otherwise explicitly 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 part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A water-injected screw air compressor comprising a casing, characterized by, Also include: Power assembly, the power assembly includes drive motor and main machine, the drive motor is drivingly connected main machine; Air inlet assembly, which is connected with the air inlet of the main machine, for injecting air into the main machine; Water circulation system, which includes water inlet pipeline, water supplement pipeline and cooling assembly, the water inlet pipeline is connected with the cooling assembly and the first filter is arranged on the water inlet pipeline, the water supplement pipeline is connected with the main machine, the temperature sensor is arranged on the water inlet pipeline, the water inlet pipeline is connected with the water supplement pipeline through the circulation pipe and the first one-way valve is arranged on the circulation pipe, the water supplement pipeline includes internal pressure balance block and second shunt block, the pressure sensor is arranged on the internal pressure balance block, a plurality of water pressure balance pipes are arranged on the internal pressure balance block, the water pressure balance pipes are connected with the main machine, the internal pressure balance block is connected with the first shunt block of the water inlet pipeline through the circulation pipe, the internal pressure balance block is connected with the second shunt block through the intermediate pipe, the second shunt block is connected with the water supplement main pipe, a plurality of second filters are arranged on the water supplement main pipe and the water inlet main pipe extends outside the box; Exhaust assembly, the exhaust assembly includes horizontal water gas bucket, the air outlet of the main machine is connected with the horizontal water gas bucket through the air outlet pipe, the bottom end of the horizontal water gas bucket is connected with the cooling assembly through the water cooling pipe, one end of the horizontal water gas bucket away from the air outlet pipe is provided with the exhaust pipe, the exhaust pipe extends outside the box, the automatic drain valve is arranged on the horizontal water gas bucket.

2. A water-injected screw air compressor according to claim 1, characterized in that, The power assembly and the exhaust assembly are arranged side by side, and the air inlet assembly is arranged above the power assembly, the water inlet pipeline and the water supplement pipeline in the water circulation system are arranged between the power assembly and the exhaust assembly, and the cooling assembly is arranged on the top of the box.

3. A water-injected screw air compressor according to claim 2, characterized in that, The cooling assembly includes a cooler and a cooling fan, the cooling fan is arranged above the cooler and communicates with the outside of the box, and the exhaust fan is arranged on one side of the upper end of the box.

4. A water-injected screw air compressor according to claim 1, wherein The water inlet pipeline includes a first shunt block, a plurality of water inlet branch pipes are connected with the first shunt block, the temperature sensor is arranged on the first shunt block, a water inlet main pipe is connected with the first shunt block, the water inlet main pipe is connected with the water outlet of the cooling assembly through the first filter, and an external discharge pipe is further arranged on the first shunt block, a manual valve is arranged on the external discharge pipe and the external discharge pipe extends to the outside of the box.

5. A water-injected screw air compressor according to claim 1, wherein The air inlet assembly includes an air filter assembly, the air filter assembly is connected with the air inlet of the main machine through an air inlet pipe, the second shunt block is connected with the air inlet pipe through two air inlet water supplement pipes, the two air inlet water supplement pipes are respectively controlled by a normally closed electromagnetic valve and a manual valve, the second shunt block is connected with the horizontal water gas bucket through a water gas bucket water supplement pipe, and a second one-way valve is arranged on the water gas bucket water supplement pipe.

6. A water-injected screw air compressor according to claim 5, wherein A relief valve is arranged on the air inlet pipe, the relief valve is connected with the horizontal water gas bucket through a relief pipe, the exhaust pipe is connected with the relief valve through a gas return pipe, and a gas-water separator and a gas return electromagnetic valve are arranged on the gas return pipe.

7. A water-injected screw air compressor according to claim 6, wherein The upper end and the bottom end of the horizontal water gas bucket are communicated through an arc-shaped pipe, the arc-shaped pipe is arranged around the outside of the horizontal water gas bucket, and a vent pipe with a manual valve is arranged on the bottom of the horizontal water gas bucket, and the vent pipe extends to the outside of the box.

8. A water-injected screw air compressor according to claim 7, characterized in that, The L-shaped baffle is arranged at the connecting position of the air outlet pipe and the air exhaust pipe with the horizontal water-air barrel, and the two L-shaped baffles are symmetrically arranged.

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