Water-cooling oil-free air compressor

Abstract

The utility model discloses a water-cooling oil-free air compressor which at least comprises but not limited to a primary filter, a secondary filter, a power assembly and a cylinder body assembly. A first-stage compression cavity and a second-stage compression cavity are formed in the cylinder body assembly, the first-stage filter and the second-stage filter are connected with the first-stage compression cavity and the second-stage compression cavity through pipelines respectively, and the power assembly is connected with a piston piece in the cylinder body assembly. The power assembly drives the piston piece to move, and air inlet and air compression are achieved. According to the scheme, the structure is unique, a lower-power motor is used, the material cost, the transportation cost, the machining cost and the assembly cost are reduced, water cooling is built in, the reliability of the piston air cylinder device is improved, the piston air cylinder device is light, convenient to use and free of lubricating engine oil, output gas is purer, and pure inert gas such as nitrogen can be compressed besides air compression; according to the scheme, only one power assembly is adopted, and compared with a traditional two-stage air compressor which is generally provided with two compression air cylinders, the cost is lower, and the space proportion is smaller.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to a water-cooled oil-free air compressor. Background Art

[0002] An air compressor is a device used to compress gas. It mainly converts the mechanical energy of an electric motor into gas pressure energy. Two-stage air compressors are widely used in industrial production due to their high compressed air pressure. However, existing two-stage air compressors are generally equipped with two compression cylinders. They are large in size, heavy, expensive, and inconvenient to carry. Therefore, their application in pressure measurement, maintenance, and outdoor activities such as diving has not been widely promoted. Utility Model Content

[0003] The purpose of the present utility model is to provide a water-cooled oil-free air compressor to address the above-mentioned shortcomings, which solves the problem that the two-stage air compressor in the prior art is generally provided with two compression cylinders, which are large in size, heavy, high in cost, and inconvenient to carry, and therefore its application in pressure measurement, maintenance, diving and other outdoor activities and life fields cannot be vigorously promoted.

[0004] The utility model is realized by the following scheme:

[0005] A water-cooled oil-free air compressor includes at least but not limited to a primary filter, a secondary filter, a power assembly and a cylinder assembly; the cylinder assembly is provided with a primary compression chamber and a secondary compression chamber, the primary filter and the secondary filter are respectively connected to the primary compression chamber and the secondary compression chamber via pipelines, and the power assembly is connected to a piston member in the cylinder assembly; the power assembly drives the piston member to move, thereby achieving air intake and gas compression.

[0006] Based on the structure of the above-mentioned water-cooled oil-free air compressor, the cylinder assembly is provided with an air intake pipe, which is connected to the first-stage compression chamber through a pipeline; the piston member includes a first-stage piston, a first-stage piston rod, a second-stage piston and a second-stage piston rod; the first-stage piston is arranged on the first-stage piston rod, the second-stage piston is arranged on the second-stage piston rod, and the second-stage piston rod is coaxially arranged with the first-stage piston rod, and the second-stage piston rod is connected to the end of the first-stage piston rod.

[0007] Based on the structure of the above-mentioned water-cooled oil-free air compressor, the first-stage piston is arranged in the first-stage compression chamber, the second-stage piston is arranged in the second-stage compression chamber, and a sinking groove is provided on the first-stage piston; at least one first channel is provided in the sinking groove; the first channel runs through the first-stage piston, and a first flexible valve plate is provided on the end surface of the first channel away from the sinking groove; the first flexible valve plate and the first channel form a one-way valve structure.

[0008] Based on the structure of the above-mentioned water-cooled oil-free air compressor, a second channel is provided at the bottom of the cylinder assembly, the second channel is connected to a first one-way valve, and the first one-way valve is connected to the primary filter through a pipeline.

[0009] Based on the structure of the above-mentioned water-cooled oil-free air compressor, the primary filter is connected to the upper end position of the cylinder assembly through the first air guide pipe, the cylinder assembly is provided with a third channel, the third channel is connected to the secondary compression chamber, and a secondary valve plate is provided on the contact surface between the third channel and the secondary compression chamber; a fourth channel is provided in the center of the secondary valve plate, and a second one-way valve is provided on the fourth channel; a fifth channel is provided in the cylinder assembly and is connected to the second one-way valve.

[0010] Based on the structure of the above-mentioned water-cooled oil-free air compressor, a sixth channel and a pressure relief valve are further provided on the cylinder assembly. The sixth channel is connected to the fifth channel, and the pressure relief valve is provided at the end position of the sixth channel.

[0011] Based on the structure of the above-mentioned water-cooled oil-free air compressor, a second air duct is provided outside the fifth channel, and the second air duct is connected to the secondary filter and the cylinder assembly respectively.

[0012] Based on the structure of the above-mentioned water-cooled oil-free air compressor, it also includes a water cooling system; the water cooling system includes a water tank and a radiator, the water tank is connected to the water inlet of the cylinder assembly through a first pipeline, and the water outlet of the cylinder assembly is connected to the radiator through a second pipeline.

[0013] Based on the structure of the above-mentioned water-cooled oil-free air compressor, a first water-cooling chamber is provided outside the first compression chamber; the first water-cooling chamber covers the entire first compression chamber, and a second water-cooling chamber is provided outside the second compression chamber; the second water-cooling chamber covers the entire second compression chamber, and a connecting groove is provided between the first water-cooling chamber and the second water-cooling chamber; the second water-cooling chamber is connected to the water outlet through a pipeline.

[0014] Based on the structure of the above-mentioned water-cooled oil-free air compressor, the power assembly includes a reduction motor, a crankshaft, a sliding plate and a guide box; the crankshaft is arranged on the output part of the reduction motor, the guide box is arranged at the bottom position of the cylinder assembly, the piston member is connected to the top position of the sliding plate, guide rods are arranged on both sides of the sliding plate, and a slide groove for limiting the guide rod is provided in the guide box, and the slide groove is arranged vertically; a sliding shaft groove is provided in the sliding plate, and the crankshaft as a whole is an L-shaped structure, one end of the crankshaft is connected to the output end of the reduction motor, and the other end is slidably arranged in the sliding shaft groove through a rotating bearing.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0016] 1. This solution has a unique structure and uses a lower power motor, which reduces material costs, transportation costs, processing costs and assembly costs. It has built-in water cooling, which improves the reliability of the piston cylinder device. It is light and easy to use, does not require lubricating oil, and the output gas is purer. In addition to air compression, it can also compress pure inert gases such as nitrogen.

[0017] 2. In this solution, a power assembly drives the piston to move, so that the gas is simultaneously taken in and compressed in the primary compression chamber and the secondary compression chamber. This solution only uses one power assembly, which is lower in cost and occupies less space than the traditional two-stage air compressor that is generally equipped with two compression cylinders. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0019] Figure 2 This is the main view of the entire utility model;

[0020] Figure 3 This is a schematic cross-sectional view of the power assembly of the present invention;

[0021] Figure 4 This is a schematic cross-sectional view of the cylinder assembly of the present invention;

[0022] Figure 5 This is a schematic cross-sectional structural diagram of the third channel in the present utility model;

[0023] Figure 6 This is a schematic diagram of the cross-sectional structure of the pressure relief valve in the utility model;

[0024] Figure 7 This is a schematic structural diagram of the piston in the utility model;

[0025] Figure 8 is a cross-sectional schematic diagram of the piston member of the present invention;

[0026] Description of the drawings: 1. Primary filter; 2. Secondary filter; 3. Power assembly; 4. Cylinder assembly; 5. First air duct; 6. Second air duct; 31. Reducer motor; 32. Crankshaft; 33. Sliding plate; 34. Guide box; 35. Guide rod; 36. Slide groove; 37. Sliding shaft groove; 38. Rotating bearing; 41. Primary compression chamber; 42. Secondary compression chamber; 43. Intake pipe; 44. Intake filter; 45. Primary piston; 46. Primary piston rod; 47. Secondary piston; 4 8. Secondary piston rod; 49. Sinking groove; 410. First channel; 411. First flexible valve disc; 412. Second channel; 413. First one-way valve; 414. Third channel; 415. Secondary valve disc; 416. Fourth channel; 417. Second one-way valve; 418. Fifth channel; 419. Sixth channel; 420. Pressure relief valve; 71. Water tank; 72. Radiator; 73. Water inlet; 74. Water outlet; 75. First water-cooling chamber; 76. Second water-cooling chamber; 77. Connecting groove. DETAILED DESCRIPTION

[0027] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0028] Any feature disclosed in this specification (including any appended claims and abstract), unless otherwise stated, may be replaced by other equivalent or similar features. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0029] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0030] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features being referred to. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of such features.

[0031] Example 1

[0032] like Figures 1 to 8 As shown, the utility model provides a technical solution:

[0033] A water-cooled oil-free air compressor includes at least but not limited to a primary filter 1, a secondary filter 2, a power assembly 3 and a cylinder assembly 4; a primary compression chamber 41 and a secondary compression chamber 42 are provided in the cylinder assembly 4, the primary filter 1 and the secondary filter 2 are respectively connected to the primary compression chamber 41 and the secondary compression chamber 42 through pipelines, and the power assembly 3 is connected to a piston member in the cylinder assembly 4; the power assembly 3 drives the piston member to move to achieve air intake and gas compression.

[0034] Based on the above structure, in this solution, a power component 3 is used to drive the piston to move, so that the gas is simultaneously taken in and compressed in the first-stage compression chamber 41 and the second-stage compression chamber 42; in this solution, only one power component 3 is used, which is lower in cost and occupies less space than the traditional two-stage air compressor which is generally equipped with two compression cylinders.

[0035] As an example, the cylinder assembly 4 is provided with an air intake pipe 43, and the air intake pipe 43 may be provided with an air intake filter 44; the air intake pipe 43 is connected to the primary compression chamber 41 through a pipeline; the piston member may include a primary piston 45, a primary piston rod 46, a secondary piston 47 and a secondary piston rod 48; the primary piston 45 is provided on the primary piston rod 46, the secondary piston 47 is provided on the secondary piston rod 48, and the secondary piston rod 48 is coaxially arranged with the primary piston rod 46, and the secondary piston rod 48 is connected to the end of the primary piston rod 46;

[0036] The primary piston 45 is disposed in the primary compression chamber 41, and the secondary piston 47 is disposed in the secondary compression chamber 42. A sinking groove 49 is provided on the primary piston 45; at least one first channel 410 is provided in the sinking groove 49; the first channel 410 extends through the primary piston 45, and a first flexible valve disc 411 is provided on the end surface of the first channel 410 away from the sinking groove 49; the first flexible valve disc 411 and the first channel 410 form a one-way valve structure.

[0037] Based on the above structure, when the first piston rod moves downward under the drive of the power mechanism, the external gas to be compressed enters the first-level compression chamber 41 at the upper part of the first piston from the intake pipe 43. During the downward movement, the first flexible valve plate 411 is closed, and the gas will not pass through the first flexible valve plate 411 from the first compression chamber at the lower part of the first piston to enter the first-level compression chamber 41 at the upper part of the first piston; first-level air intake is achieved; when the first piston rod moves upward under the drive of the power mechanism, the first flexible valve plate 411 is automatically opened by the gas compression pressure in the first-level compression chamber 41 at the upper part of the first piston, so that the gas in the first-level compression chamber 41 at the upper part of the first piston passes through the first channel 410 into the first-level compression chamber 41 at the lower part of the first piston.

[0038] As an example, a second channel 412 is provided at the bottom of the cylinder assembly, and a first one-way valve 413 is connected to the second channel 412. The first one-way valve 413 is connected to the primary filter 1 through a pipeline;

[0039] Based on the above structure, when the first-level compression chamber 41 at the lower part of the first piston is filled with the gas to be compressed, when the first piston rod moves downward, the gas to be compressed will flow to the second channel 412. When the opening pressure of the first one-way valve 413 is reached, the gas will pass through the second channel 412 and the first one-way valve 413 and enter the first-level filter 1, and be carried out in the first-level filter 1.

[0040] As an example, the first-stage filter 1 is connected to the upper end position of the cylinder assembly through the first air duct 5. A third channel 414 is provided in the cylinder assembly, and the third channel 414 is connected to the secondary compression chamber 42. A secondary valve plate 415 is provided on the contact surface between the third channel 414 and the secondary compression chamber 42; a fourth channel 416 is provided in the center of the secondary valve plate 415, and a second one-way valve 417 is provided on the fourth channel 416; a fifth channel 418 is provided in the cylinder assembly and is connected to the second one-way valve 417.

[0041] Based on the above structure, when the second piston rod moves downward, the gas enters the cylinder assembly from the first-level filter 1 and the first air guide pipe 5, and finally enters the second compression chamber through the third channel 414 and the secondary valve plate 415. When the second piston rod moves upward, the gas enters the one-way valve from the second compression chamber through the fourth channel 416, and then is discharged from the cylinder assembly through the fifth channel 418.

[0042] As an example, a sixth channel 419 and a pressure relief valve 420 are further provided on the cylinder assembly. The sixth channel 419 is connected to the fifth channel 418 , and the pressure relief valve 420 is provided at the end position of the sixth channel 419 .

[0043] Based on the above structure, the safety inside can be ensured by setting the pressure relief valve 420. When the pressure is too high, the pressure relief valve 420 will be opened first to avoid damage to subsequent devices.

[0044] As an example, a second air duct 6 is provided outside the fifth channel 418 , and the second air duct 6 is connected to the secondary filter 2 and the cylinder assembly respectively.

[0045] Based on the above structure, the gas after secondary compression enters the secondary filter 2 and is finally discharged outward from the secondary filter 2.

[0046] As an example, a water cooling system is also included; the water cooling system may include a water tank 71 and a radiator 72, the water tank 71 is connected to the water inlet 73 of the cylinder assembly through a first pipeline, and the water outlet 74 of the cylinder assembly is connected to the radiator 72 through a second pipeline.

[0047] Based on the above structure, the cylinder assembly cools down the internal first compression chamber and the second compression chamber through the water channel to ensure the stability of the cylinder assembly, extend the overall service life, and enable it to be used for continuous compression. In the existing technology, most of the air cooling structures are used. The air cooling structure can only cool the outside, and the cooling effect is not significant enough. The internal heating area cannot be dissipated by air cooling, which will cause the existing air compression device to be unable to operate for a long time and needs to be cooled. The water cooling structure specially set up in this scheme can continuously and uninterruptedly cool the internal heating area, and finally dissipate heat through the radiator 72 to ensure the stability of the internal water temperature.

[0048] As an example, a first water-cooling chamber 75 is provided on the outside of the first compression chamber; the first water-cooling chamber 75 covers the entire first compression chamber, and a second water-cooling chamber 76 is provided on the outside of the second compression chamber; the second water-cooling chamber 76 covers the entire second compression chamber, and a connecting groove 77 is provided between the first water-cooling chamber 75 and the second water-cooling chamber 76; the second water-cooling chamber 76 is connected to the water outlet 74 through a pipeline.

[0049] Based on the above structure, the liquid enters the first water-cooling chamber 75 through the first pipeline. The heat generated by the piston movement is mainly concentrated in the first compression chamber and the second compression chamber. The cooling liquid exchanges heat with the first compression chamber in the first water-cooling chamber to reduce the temperature of the first compression chamber. Then, the cooling liquid enters the second water-cooling chamber 76 through the connecting groove 77. The cooling liquid exchanges heat with the second compression chamber in the second water-cooling chamber 76 to reduce the temperature of the second compression chamber. Finally, the cooling liquid is discharged from the cylinder assembly through the water outlet 74.

[0050] As an example, the power assembly 3 may include a reduction motor 31, a crankshaft 32, a sliding plate 33 and a guide box 34; the crankshaft 32 is arranged on the output part of the reduction motor 31, the guide box 34 is arranged at the bottom position of the cylinder assembly, the piston is connected to the bottom position of the sliding plate 33, guide rods 35 are arranged on both sides of the sliding plate 33, and a slide groove 36 for limiting the guide rod 35 is arranged in the guide box 34, and the slide groove 36 is arranged vertically.

[0051] A sliding shaft groove 37 is provided in the sliding plate 33 . The crankshaft 32 is an L-shaped structure as a whole. One end of the crankshaft 32 is connected to the output end of the reduction motor 31 , and the other end is slidably provided in the sliding shaft groove through a rotating bearing 38 .

[0052] Based on the above structure, the reduction motor 31 rotates, driving the crankshaft 32 to move. The crankshaft 32 rotates so that the rotating bearing 38 reciprocates in the sliding shaft groove, and drives the entire sliding plate 33 to move up and down along the direction of the sliding groove 36, and finally drives the piston member to reciprocate, realizing the synchronous driving of the first piston rod and the second piston rod.

[0053] Cooling water is stored in a water tank 71 (which can also be other cooling liquids). A pump inside this tank pumps water through a water pipe into the first water-cooling chamber 75, cooling the primary cylinder. The water then flows through a water channel into the second water-cooling chamber, cooling the secondary cylinder liner. The water cools the primary and secondary cylinders, raising its temperature. The heated water then flows through the water pipe into the water-cooling radiator 72, where it dissipates heat. The cooled water then flows through the pipe into the water tank 71, where it circulates and cools the compressor.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A water-cooled oil-free air compressor, characterized in that: At least includes but is not limited to a primary filter, a secondary filter, a power assembly and a cylinder assembly; the cylinder assembly is provided with a primary compression chamber and a secondary compression chamber, the primary filter and the secondary filter are connected to the primary compression chamber and the secondary compression chamber respectively through pipelines, and the power assembly is connected to the piston member in the cylinder assembly; the piston member is driven to move by the power assembly to realize air intake and gas compression; the cylinder assembly is provided with an air intake pipe, and the air intake pipe is connected to the primary compression chamber through a pipeline; the piston member includes a primary piston, a primary piston rod, a secondary piston and a secondary piston rod; the primary piston is arranged on the primary piston rod, the secondary piston is arranged on the secondary piston rod, and the secondary piston rod is coaxial with the primary piston rod, and the secondary piston rod is coaxial with the primary piston rod. The piston rod is connected to the end of the first-stage piston rod; a second channel is provided at the bottom of the cylinder assembly, a first one-way valve is connected to the second channel, and the first one-way valve is connected to the first-stage filter through a pipeline; the power assembly includes a reduction motor, a crankshaft, a sliding plate and a guide box; the crankshaft is arranged on the output part of the reduction motor, the guide box is arranged at the bottom position of the cylinder assembly, the piston member is connected to the top position of the sliding plate, guide rods are provided on both sides of the sliding plate, and a sliding groove for limiting the guide rod is provided in the guide box, and the sliding groove is vertically arranged; a sliding shaft groove is provided in the sliding plate, and the crankshaft as a whole is an L-shaped structure, one end of the crankshaft is connected to the output end of the reduction motor, and the other end is slidably arranged in the sliding shaft groove through a rotating bearing.

2. The water-cooled oil-free air compressor according to claim 1, characterized in that: The first-stage piston is arranged in the first-stage compression chamber, and the second-stage piston is arranged in the second-stage compression chamber. A sinking groove is arranged on the first-stage piston; at least one first channel is arranged in the sinking groove; the first channel runs through the first-stage piston, and a first flexible valve plate is arranged on the end surface of the first channel away from the sinking groove; the first flexible valve plate and the first channel form a one-way valve structure.

3. A water-cooled oil-free air compressor according to claim 2, characterized in that: The primary filter is connected to the upper end portion of the cylinder assembly through a first air guide pipe; a third channel is provided in the cylinder assembly, the third channel is connected to the secondary compression chamber, a secondary valve plate is provided on the contact surface between the third channel and the secondary compression chamber; a fourth channel is provided in the center of the secondary valve plate, a second one-way valve is provided on the fourth channel; a fifth channel is provided in the cylinder assembly and is connected to the second one-way valve.

4. A water-cooled oil-free air compressor according to claim 3, characterized in that: The cylinder assembly is further provided with a sixth channel and a pressure relief valve. The sixth channel is connected to the fifth channel, and the pressure relief valve is provided at the end of the sixth channel.

5. The water-cooled oil-free air compressor according to claim 4, characterized in that: A second air duct is provided outside the fifth channel, and the second air duct is connected to the secondary filter and the cylinder assembly respectively.

6. A water-cooled oil-free air compressor according to any one of claims 1 to 5, characterized in that: It also includes a water cooling system; the water cooling system includes a water tank and a radiator, the water tank is connected to the water inlet of the cylinder assembly through a first pipeline, and the water outlet of the cylinder assembly is connected to the radiator through a second pipeline.

7. The water-cooled oil-free air compressor according to claim 6, characterized in that: A first water-cooling chamber is provided outside the first-stage compression chamber; the first water-cooling chamber covers the entire first-stage compression chamber, and a second water-cooling chamber is provided outside the second-stage compression chamber; the second water-cooling chamber covers the entire second-stage compression chamber, and a connecting groove is provided between the first water-cooling chamber and the second water-cooling chamber; the second water-cooling chamber is connected to the water outlet through a pipeline.

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