Air compressor intake structure

Abstract

The present invention relates to the technical field of air compressors, and specifically to an air intake structure of an air compressor, comprising a cylinder body, a piston slidably mounted at the lower position of the cylinder body, a plug slidably mounted at the upper position of the cylinder body, a column rod inserted in a center hole, a pressure sensor for detecting the air pressure in the space between the plug and the piston of the cylinder body installed on the outer surface of the cylinder body, an L-shaped plate installed on the upper surface of a cylinder cover, a vertically arranged driving member installed on the upper surface of a horizontal portion of the L-shaped plate, a first straight pipe inserted in a first guide hole, a second straight pipe inserted in a second guide hole, an exhaust valve connected to the compression cylinder body installed on the upper end of the first straight pipe, an intake valve installed on the upper end of the second straight pipe, the other end of the intake valve adjacently communicating with an air filter outlet via a curved pipe, the present invention has the following beneficial effects: preventing the intake valve from generating greater noise due to an increase in air flow rate, and eliminating the need for frequent shutdowns to clean or replace filter elements in the air filter.

Description

Technical Field

[0001] The invention relates to an air intake structure for an air compressor, belonging to the technical field of air compressors. Background Art

[0002] Working principle of air compressor: After the driver is started, the compressor crankshaft rotates through the triangular tape, and is converted into reciprocating motion of the piston in the cylinder body through the crank rod mechanism. When the piston moves from the cover side to the shaft, the cylinder volume increases, the pressure in the cylinder is lower than the atmospheric pressure, and the outside air enters the cylinder through the filter and the suction valve; after reaching the bottom dead point, the piston moves from the shaft side to the cover side, the suction valve is closed, the cylinder volume gradually decreases, the air in the cylinder is compressed, and the pressure increases. When the pressure reaches a certain value, the exhaust valve is pushed open, and the compressed air enters the air tank through the pipeline. In this way, the compressor works repeatedly, continuously delivering compressed air to the air tank, so that the pressure in the tank gradually increases, thereby obtaining the required compressed air.

[0003] In order to prevent dust and other debris in the air from entering the cylinder, an air filter needs to be installed at the inlet of the intake valve. The air filter includes a shell and a filter element installed in the shell. The filter element is statically installed in the shell to filter dust and other debris in the air. With long-term use, more debris will adhere to the surface of the filter element, thereby reducing the amount of air flowing through the filter element per unit time. The cylinder volume in the air compressor is constant, and the range of motion of the piston in the cylinder is constant. When the piston moves to the lower dead point in the cylinder, the air enters the cylinder through the channel formed by the air filter and the intake valve. Affected by the debris attached to the surface of the filter element, The amount of air that enters the cylinder at a time is reduced, while the negative pressure generated in the cylinder is constant. At this time, the air flow rate flowing through the intake valve increases, causing a large noise at the intake valve. At the same time, the resistance to the movement of the piston also increases, resulting in an increase in the load of the motor that drives the piston to move, which increases the failure rate of the air compressor. At present, the technical means to solve the above problems is to remove the filter element from the housing from time to time and clean or replace it. This method requires the air compressor to stop working. If the air compressor is used continuously for a long time, frequent shutdowns to clean or replace the filter element will obviously affect the normal use of the air compressor. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the present invention is to provide an air intake structure for an air compressor to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical scheme: an air compressor intake structure, comprising a cylinder body, both ends of the cylinder body are open-shaped, a piston is slidably installed in the lower position of the cylinder body, a driving mechanism is rotatably connected in the piston, a detachable cylinder head is installed on the upper end of the cylinder body, a plug is slidably installed in the upper position of the cylinder body, a center hole is opened in the middle position of the upper surface of the cylinder head, a column rod is inserted in the center hole, the lower end of the column rod extends into the cylinder body and is connected and fixed to the plug head, a pressure sensor for detecting the air pressure in the space between the cylinder head and the piston is installed on the outer surface of the cylinder body, the pressure sensor is electrically connected to the input end of a PLC controller, an L-shaped plate is installed on the upper surface of the cylinder head, a vertically arranged driving member is installed on the upper surface of the horizontal part of the L-shaped plate, the input end of the driving member is electrically connected to the output end of the PLC controller, the movable end of the driving member passes through the horizontal part of the L-shaped plate and is connected and fixed to the upper end of the column rod, and an inlet and outlet air mechanism that can move relative to the cylinder head is inserted on the upper surface of the cylinder head.

[0006] Furthermore, the air inlet and outlet mechanism comprises a first straight pipe, the upper surface of the cylinder head is provided with a first guide hole and a second guide hole which are symmetrically arranged, the first straight pipe is inserted into the first guide hole, and the lower end of the first straight pipe passes through the plug and is connected and fixed to the plug;

[0007] A second straight pipe is inserted in the second guide hole, the lower end of the second straight pipe passes through the plug and is fixedly connected to the plug, the upper end of the first straight pipe is equipped with an exhaust valve connected to the compression cylinder body, the upper end of the second straight pipe is equipped with an intake valve, and the other end of the intake valve is adjacently connected to the air filter outlet through a bent pipe.

[0008] Specifically, two symmetrically arranged first positioning holes and second positioning holes are provided on the upper surface of the plug, the lower end of the first straight tube is fixed in the first positioning hole, and the lower end of the second straight tube is fixed in the second positioning hole.

[0009] Specifically, the column is a hollow structure, a round cover is connected and fixed to the lower end of the column, the inner space of the column is connected to the inner space of the round cover, the lower end of the round cover is open and connected and fixed to the plug, and the round cover is concentrically arranged with the plug;

[0010] A small hole is formed on the upper surface of the horizontal portion of the L-shaped plate, an upper through hole is formed on the upper surface of the horizontal portion of the L-shaped plate, a connecting pipe is inserted in the small hole, the lower end of the connecting pipe is connected to and communicated with one end of a high-pressure hose, the other end of the high-pressure hose is mounted on the outer surface of the upper end of the column and the high-pressure hose is communicated with the internal space of the column, and the upper end of the connecting pipe passes through the through hole and extends into the water storage cylinder;

[0011] A pressing mechanism for pressing the plug is slidably installed in the water storage cylinder.

[0012] Specifically, the holding mechanism includes a positioning plate, the bottom of the water storage cylinder is connected and fixed with the positioning plate, the upper surface of the positioning plate is annularly provided with a plurality of fixing holes at equal intervals, one end of the connecting pipe in the water storage cylinder passes through the sealing plug and is connected and fixed to the sealing plug, and the sealing plug is slidably installed in the water storage cylinder;

[0013] The upper end of the water storage cylinder is connected and fixed with a cylinder cover, a pressure relief valve is installed in the middle of the upper surface of the cylinder cover, the water storage cylinder is in the space between the sealing plug and the cylinder cover to store water, a water inlet is installed on the outer surface of the upper end of the water storage cylinder, and a threaded plugging cap is threadedly connected to the end of the water inlet away from the water storage cylinder;

[0014] A circular hole aligned with the upper through hole is provided in the middle of the lower surface of the positioning plate, a pressure rod is inserted in the upper through hole, the upper end of the pressure rod passes through the circular hole and is connected and fixed to the sealing plug, a lower through hole aligned with the upper through hole is provided on the upper surface of the cylinder cover, the lower end of the pressure rod passes through the lower through hole and contacts with the upper surface of the plug head.

[0015] Specifically, the driving mechanism includes a crank, which is rotatably connected inside the piston, and one end of the crank away from the piston extends to the outside of the cylinder body and is connected and fixed with an upper sleeve, the upper sleeve is sleeved on the crankshaft, a lower sleeve is provided on the lower side of the upper sleeve and the upper sleeve is connected and fixed to the lower sleeve by multiple bolts, and the lower sleeve is sleeved on the crankshaft.

[0016] Specifically, a support plate connected and fixed to the column is sleeved on the upper end of the column, a rod head is installed on the lower surface of the support plate, a button switch for cutting off the power supply of the air compressor is provided directly below the rod head, and the button switch is installed on the upper surface of the cylinder cover.

[0017] Specifically, a column hole is opened on the upper surface of the support plate, and a limiting cylinder arranged concentrically with the column hole is provided on the upper side of the column hole. The lower end of the limiting cylinder is open and is connected and fixed to the support plate. A vertically arranged spring is provided at the upper position inside the limiting cylinder, and a pan head is provided on the lower side of the spring. The pan head is slidably installed in the limiting cylinder, and the upper end of the rod head passes through the column hole and extends into the limiting cylinder to be connected and fixed to the pan head, and the diameter of the pan head is larger than the inner diameter of the column hole.

[0018] Specifically, a plurality of cooling fins are evenly sleeved on the outer surface of the cylinder body, the cooling fins and the cylinder body are an integrally formed structure, a connecting ring fixedly connected to the cylinder body is sleeved on the outer surface of the lower end of the cylinder body, and a plurality of mounting holes for inserting bolts are equidistantly opened in a circular shape on the upper surface of the connecting ring.

[0019] Beneficial effects of the present invention:

[0020] 1. When the filter element in the air filter is blocked, the amount of air entering the cylinder body is reduced, and the negative pressure in the cylinder body increases when the piston moves to the lower dead center. The pressure sensor installed on the surface of the cylinder body detects the size of the negative pressure. When the negative pressure reaches the preset value, the PLC controller controls the drive member to drive the column rod to move, so that the column rod drives the plug head to move downward, so that the minimum distance between the plug head and the piston becomes smaller, and then when the air intake amount decreases, the negative pressure formed in the cylinder body is reduced, and the air flow rate flowing through the intake valve is reduced, preventing the increase in air flow rate from causing the intake valve to produce a large noise. At the same time, because the resistance of the piston to overcome the negative pressure is reduced, the motor is in a low load state, which reduces the failure rate of the air compressor. There is no need to frequently stop the machine to clean or replace the filter element in the air filter, and the frequency of cleaning or replacing the filter element in the air filter is reduced.

[0021] 2. Install the rod head on the column rod, and install a button switch on the top of the cylinder head to control whether the compressed air machine is powered on or not. When the plug moves to the lowest point, the rod head presses the button switch to put it in the off state, which stops the air compressor from working if the filter element is blocked.

[0022] 3. Make the rod head pass through the column hole on the support plate and extend into the limit cylinder and connect to the fixed disk head, so that under the restriction of the disk head, the upper end of the rod head is prevented from escaping from the limit cylinder, thereby limiting the position of the rod head. When the rod head squeezes the button switch, under the obstruction of the button switch, the rod head slides upward along the column hole relative to the support plate, so that the column drives the disk head to squeeze the spring, causing the spring to produce elastic deformation, thereby preventing the rod head from causing hard squeezing of the button switch, thereby protecting the button switch.

[0023] 4. Water absorbs the heat on the plug to form water vapor, which is discharged into the space between the sealing plug and the cylinder cover of the water storage cylinder through the channel formed by the column rod, the high-pressure hose and the connecting pipe, thereby reducing the temperature of the plug surface and playing a cooling role. At the same time, the air pressure in the space between the sealing plug and the cylinder cover in the water storage cylinder increases, forcing the sealing plug to move downward, so that the pressure rod exerts a downward holding force on the plug. Under the action of the downward holding force of the pressure rod on the plug, the air pressure generated during the upward movement of the piston in the cylinder is prevented from acting completely on the driving member through the structure formed by the plug and the column rod, thereby reducing the load of the driving member and protecting the driving member.

[0024] 5. When the air pressure in the space between the seal plug and the cylinder cover in the water storage cylinder is greater than the opening pressure of the pressure relief valve, the pressure relief valve opens to discharge part of the water vapor in the water storage cylinder, thereby preventing the air pressure in the space between the seal plug and the cylinder cover in the water storage cylinder from being too high, causing the pressure rod to over-press the plug head. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0026] Figure 1 It is a structural schematic diagram of an air intake structure of an air compressor of the present invention;

[0027] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0028] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0029] Figure 4 Another perspective view of an air compressor intake structure of the present invention;

[0030] Figure 5 It is a schematic diagram of the assembly of a pressure sensor and a cylinder body in an air intake structure of an air compressor of the present invention;

[0031] Figure 6 It is a schematic diagram of the assembly of a piston, a crank and a crankshaft in an air intake structure of an air compressor of the present invention;

[0032] Figure 7 It is a schematic diagram of the assembly of a driving member, a column rod, a round cover and a plug in an air intake structure of an air compressor of the present invention;

[0033] Figure 8 It is a schematic diagram of the assembly of an L-shaped plate and a cylinder head in an air intake structure of an air compressor of the present invention;

[0034] Fig. 9 It is an exploded schematic diagram of the assembly of a limit cylinder, a spring, a disc head, a rod head and a support plate in an air intake structure of an air compressor of the present invention;

[0035] Fig.10 It is a schematic diagram of the assembly of a connecting pipe, a pressure rod and a sealing plug in an air intake structure of an air compressor of the present invention;

[0036] Fig.11 It is a schematic diagram of the assembly of a positioning plate and a water storage cylinder in an air intake structure of an air compressor of the present invention;

[0037] In the figure: 1, cylinder block, 2, cooling fins, 3, crank, 4, crankshaft, 5, lower sleeve, 6, upper sleeve, 7, connecting ring, 8, cylinder head, 9, L-shaped plate, 10, first straight pipe, 11, exhaust valve, 12, water storage cylinder, 13, air filter, 14, elbow, 15, drive member, 16, intake valve, 17, second straight pipe, 18, limit cylinder, 19, support plate, 20, rod head, 21, button switch, 22, column rod, 23, high-pressure hose, 24, pressure relief valve, 25, Cylinder cover, 26, positioning plate, 27, connecting pipe, 28, pressure rod, 29, pressure sensor, 30, piston, 31, round cover, 32, plug, 33, first positioning hole, 34, second positioning hole, 35, first guide hole, 36, center hole, 37, second guide hole, 38, small hole, 39, upper through hole, 40, lower through hole, 41, spring, 42, pan head, 43, column hole, 44, sealing plug, 45, round hole, 46, through hole, 47, water inlet, 48, threaded plug. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0039] Embodiment 1: The filter element of the air filter is taken out from the air filter housing from time to time and cleaned or replaced. This method requires the air compressor to be stopped. If the air compressor is used continuously for a long time, frequent shutdowns to clean or replace the filter element will obviously affect the normal use of the air compressor.

[0040] To solve the above problems, please refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 The present invention provides a technical solution: an air compressor intake structure, comprising a cylinder body 1, both ends of the cylinder body 1 are open, a removable cylinder cover 8 is installed on the upper end of the cylinder body 1, a plurality of heat dissipation fins 2 are evenly sleeved on the outer surface of the cylinder body 1, the heat dissipation fins 2 and the cylinder body 1 are an integrally formed structure, the design of the heat dissipation fins 2 plays a role in increasing the heat dissipation area of ​​the cylinder body 1, and at the same time improves the mechanical strength of the cylinder body 1 structure, a connecting ring 7 connected and fixed to the cylinder body 1 is sleeved on the outer surface of the lower end of the cylinder body 1, a plurality of mounting holes for inserting bolts are equidistantly opened in an annular shape on the upper surface of the connecting ring 7, the connecting ring 7 is installed on the surface of the crankcase by bolts, and the connection and fixation of the cylinder body 1 and the crankcase are completed.

[0041] A piston 30 is slidably installed at the lower position of the cylinder body 1, and a crank 3 is rotatably connected in the piston 30. One end of the crank 3 away from the piston 30 extends to the outside of the cylinder body 1 and is connected and fixed with an upper sleeve 6. The upper sleeve 6 is sleeved on the crankshaft 4. A lower sleeve 5 is provided on the lower side of the upper sleeve 6 and the upper sleeve 6 is connected and fixed to the lower sleeve 5 by multiple bolts. The lower sleeve 5 is sleeved on the crankshaft 4, so that the crankshaft 4 rotates under the drive of the motor. At this time, the crankshaft 4 drives the crank 3 to rotate through the upper sleeve 6 and the lower sleeve 5, and the crank 3 drives the piston 30 to move up and down in the cylinder body 1. When the piston 30 moves downward, the intake valve 16 opens and the exhaust valve 11 closes. The external air enters the space between the plug head 32 and the piston 30 of the cylinder body 1 after being filtered by the air filter 13. When the piston 30 moves upward, the intake valve 16 closes and the exhaust valve 11 opens, so that the air in the cylinder body 1 enters the air storage tank under the extrusion of the piston 30.

[0042] A plug 32 is slidably installed at the upper position of the cylinder body 1, and a center hole 36 is opened in the middle position of the upper surface of the cylinder cover 8. A column rod 22 is inserted into the center hole 36, so that the column rod 22 passes through the center hole 36 and makes sliding contact with the cylinder cover 8, which facilitates the movement of the column rod 22 along the center hole 36.

[0043] The lower end of the column 22 extends into the cylinder body 1 and is connected and fixed to the plug 32. A pressure sensor 29 for detecting the air pressure in the space between the plug 32 and the piston 30 of the cylinder body 1 is installed on the outer surface of the cylinder body 1. The pressure sensor 29 is electrically connected to the input end of the PLC controller. An L-shaped plate 9 is installed on the upper surface of the cylinder cover 8. A vertically arranged driving member 15 is installed on the upper surface of the horizontal portion of the L-shaped plate 9. The driving member 15 adopts an electric push rod. The input end of the driving member 15 is electrically connected to the output end of the PLC controller. The movable end of the driving member 15 passes through the horizontal portion of the L-shaped plate 9 and is connected and fixed to the upper end of the column 22. The upper surface of the cylinder cover 8 is provided with symmetrical A first guide hole 35 and a second guide hole 37 are arranged, and a first straight tube 10 is inserted in the first guide hole 35. The lower end of the first straight tube 10 passes through the plug 32 and is fixedly connected to the plug 32. A second straight tube 17 is inserted in the second guide hole 37. The lower end of the second straight tube 17 passes through the plug 32 and is fixedly connected to the plug 32. Two symmetrically arranged first positioning holes 33 and a second positioning holes 34 are provided on the upper surface of the plug 32. The lower end of the first straight tube 10 is fixed in the first positioning hole 33, and the lower end of the second straight tube 17 is fixed in the second positioning hole 34, thereby completing the assembly of the first straight tube 10, the second straight tube 17 and the plug 32.

[0044] An exhaust valve 11 connected to the compression cylinder 1 is installed at the upper end of the first straight pipe 10, and an intake valve 16 is installed at the upper end of the second straight pipe 17. The other end of the intake valve 16 is adjacent to the air outlet of the air filter 13 through the elbow 14. A plug 32 is slidably installed in the cylinder 1 to separate the internal space of the cylinder 1, and the first straight pipe 10 and the second straight pipe 17 are respectively installed on the intake valve 16 and the exhaust valve 11, so that the first straight pipe 10 and the second straight pipe 17 both penetrate the plug 32 and are fixedly connected to the plug 32. At this time, the first straight pipe 10 and the second straight pipe 17 are connected to the space in the cylinder 1 where the piston 30 is installed. When the piston 30 moves up and down, the air enters the cylinder 1 through the channel formed by the air filter 13, the intake valve 16 and the second straight pipe 17, and the air in the cylinder 1 enters the air storage tank through the channel formed by the second straight pipe 17 and the exhaust valve 11.

[0045] When the filter element in the air filter 13 is blocked, the amount of air entering the cylinder 1 is reduced, and the negative pressure in the cylinder 1 increases when the piston 30 moves to the lower dead center. The pressure sensor 29 installed on the surface of the cylinder 1 detects the size of the negative pressure. When the negative pressure reaches the preset value, the PLC controller controls the drive member 15 to drive the column rod 22 to move, so that the column rod 22 drives the plug head 32 to move downward, so that the minimum distance between the plug head 32 and the piston 30 becomes smaller, and then when the air intake amount decreases, the negative pressure formed in the cylinder 1 is reduced, and the air flow rate flowing through the intake valve 16 is reduced, so as to prevent the increase in air flow rate from causing the intake valve 16 to generate a large noise. At the same time, because the resistance of the piston 30 to overcome the negative pressure is reduced, the motor is in a low load state, which reduces the failure rate of the air compressor. There is no need to frequently stop the machine to clean or replace the filter element in the air filter 13, and the frequency of cleaning or replacing the filter element in the air filter 13 is reduced.

[0046] Embodiment 2: When the piston 30 moves upward to squeeze the air in the cylinder 1, the air has a large resistance due to the pressure in the air tank, and then the air in the cylinder 1 will cause an upward thrust on the plug 32, and the thrust will act on the driving member 15 through the column rod 22, so that the driving member 15 is under a large load state, which affects the structure of the driving member 15 and requires a high connection strength between the driving member 15 and the L-shaped plate 9;

[0047] To solve the above problems, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 8 , Fig.10 and Fig.11The column 22 is a hollow structure, and a round cover 31 is connected and fixed at the lower end of the column 22. The internal space of the column 22 is connected to the internal space of the round cover 31. The lower end of the round cover 31 is open and is connected and fixed to the plug 32. The round cover 31 and the plug 32 are arranged concentrically, and the round cover 31 and the plug 32 form a space for storing water.

[0048] A small hole 38 is opened on the upper surface of the horizontal part of the L-shaped plate 9, and an upper through hole 39 is opened on the upper surface of the horizontal part of the L-shaped plate 9. A connecting pipe 27 is inserted in the small hole 38, so that the connecting pipe 27 is inserted in the small hole 38, and then when the sealing plug 44 moves in the water storage cylinder 12, the connecting pipe 27 can move along the small hole 38.

[0049] The lower end of the connecting pipe 27 is connected to one end of the high-pressure hose 23, and the other end of the high-pressure hose 23 is installed on the outer surface of the upper end of the column 22. The high-pressure hose 23 is connected to the internal space of the column 22. The column 22 and the connecting pipe 27 are connected by the high-pressure hose 23, so as not to affect the up and down movement of the connecting pipe 27.

[0050] The upper end of the connecting pipe 27 passes through the through hole 46 and extends into the water storage cylinder 12. A positioning plate 26 is connected and fixed to the bottom of the water storage cylinder 12. The upper surface of the positioning plate 26 is annularly provided with multiple fixing holes at equal intervals, so that bolts can be passed through the fixing holes and installed at the required position on the surface of the air compressor, thereby limiting the position of the water storage cylinder 12.

[0051] One end of the connecting pipe 27 in the water storage cylinder 12 passes through the sealing plug 44 and is connected and fixed to the sealing plug 44. The sealing plug 44 is slidably installed in the water storage cylinder 12. A cylinder cover 25 is connected and fixed to the upper end of the water storage cylinder 12. A pressure relief valve 24 is installed in the middle position of the upper surface of the cylinder cover 25. The water storage cylinder 12 stores water in the space between the sealing plug 44 and the cylinder cover 25. A water filling port 47 is installed on the outer surface of the upper end of the water storage cylinder 12. The end of the water filling port 47 away from the water storage cylinder 12 is threadedly connected with a threaded plug 48. After opening the threaded plug 48, it is convenient to add water to the space between the sealing plug 44 and the cylinder cover 25 in the water storage cylinder 12 through the water filling port 47, so that the water storage cylinder 12 has a transparent structure, which is convenient for observing the water level in the water storage cylinder 12.

[0052] A circular hole 45 aligned with the upper through hole 39 is provided at the middle of the lower surface of the positioning plate 26, a pressure rod 28 is inserted in the upper through hole 39, the upper end of the pressure rod 28 passes through the circular hole 45 and is connected and fixed to the sealing plug 44, a lower through hole 40 aligned with the upper through hole 39 is provided on the upper surface of the cylinder head 8, the lower end of the pressure rod 28 passes through the lower through hole 40 and contacts the upper surface of the plug 32, and a proper amount of water is added to the space between the sealing plug 44 and the cylinder cover 25 in the water storage cylinder 12, and then the water flows into the channel formed by the connecting pipe 27, the high-pressure hose 23 and the column rod 22 to the circular cover 31 and the plug 32. In the space, the moisture is in direct contact with the plug 32, and then the moisture absorbs the heat generated during the compression of the air on the plug 32 and the heat generated by the sliding friction between the piston 30 and the cylinder 1 to form water vapor, and the water vapor is discharged to the space between the sealing plug 44 and the cylinder cover 25 of the water storage cylinder 12 through the channel formed by the column rod 22, the high-pressure hose 23 and the connecting pipe 27, thereby reducing the temperature of the surface of the plug 32 and playing a cooling role, wherein the heat generated during the compression of the air and the heat generated by the sliding friction between the piston 30 and the cylinder 1 will be conducted to the plug 32 to increase the temperature of the plug 32.

[0053] At the same time, the air pressure in the space between the sealing plug 44 and the cylinder cover 25 in the water storage cylinder 12 increases, forcing the sealing plug 44 to have a tendency to move downward. When the sealing plug 44 moves downward, the connecting pipe 27 slides along the channel formed by the through hole 46 and the small hole 38, and the pressure rod 28 slides along the channel formed by the circular hole 45, the upper through hole 39 and the lower through hole 40, so that the pressure rod 28 produces a downward pressing force on the plug head 32. Under the action of the downward pressing force of the pressure rod 28 on the plug head 32, the air pressure generated during the upward movement of the piston 30 in the cylinder body 1 is prevented from completely acting on the driving member 15 through the structure formed by the plug head 32 and the column rod 22, so that the load of the driving member 15 is reduced, thereby protecting the driving member 15.

[0054] When the air pressure in the space between the seal and the cylinder cover 25 in the water storage cylinder 12 is greater than the opening pressure of the pressure relief valve 24, the pressure relief valve 24 opens, thereby discharging part of the water vapor in the water storage cylinder 12, thereby preventing the air pressure in the space between the sealing plug 44 and the cylinder cover 25 in the water storage cylinder 12 from being too high, causing the pressure rod 28 to over-press the plug head 32.

[0055] Embodiment 3: When the plug 32 moves to the lowest point, that is, when the driving member 15 is extended to the maximum stroke, the filter element blockage is still not resolved, and the flow rate through the suction valve 16 increases, generating noise and increasing the motor load;

[0056] To solve the above problems, please refer to Figure 1 , Figure 2 , Figure 4 and Fig. 9A support plate 19 connected and fixed to the column rod 22 is sleeved on the upper end of the column rod 22, and a rod head 20 is installed on the lower surface of the support plate 19. A button switch 21 for cutting off the power supply of the air compressor is provided directly below the rod head 20. The button switch 21 is installed on the upper surface of the cylinder head 8, and the rod head 20 is installed on the column rod 22. A button switch 21 for controlling whether the compressed air machine is powered on or not is installed on the top of the cylinder head 8. When the plug 32 moves to the lowest point, the rod head 20 presses the button switch 21 to put the button switch 21 in an off state, thereby stopping the air compressor from working when the filter element is blocked.

[0057] A column hole 43 is provided on the upper surface of the support plate 19, and a limiting cylinder 18 arranged concentrically with the column hole 43 is provided on the upper side of the column hole 43. The lower end of the limiting cylinder 18 is open and connected and fixed to the support plate 19. A spring 41 arranged vertically is provided at the upper position inside the limiting cylinder 18, and a pan head 42 is provided on the lower side of the spring 41. The pan head 42 is slidably installed in the limiting cylinder 18. The upper end of the rod head 20 passes through the column hole 43 and extends into the limiting cylinder 18 to be connected and fixed with the pan head 42. The diameter of the pan head 42 is larger than the inner diameter of the column hole 43, so that the rod head 20 passes through the column hole 43 on the support plate 19. After that, it extends into the limiting cylinder 18 and is connected to the fixed disk head 42, and then under the restriction of the disk head 42, the upper end of the rod head 20 is prevented from escaping from the limiting cylinder 18, thereby limiting the position of the rod head 20. When the rod head 20 squeezes the button switch 21, under the obstruction of the button switch 21, the rod head 20 slides upward along the column hole 43 relative to the support plate 19, so that the column rod 22 drives the disk head 42 to squeeze the spring 41, causing the spring 41 to produce elastic deformation, thereby preventing the rod head 20 from causing hard squeezing of the button switch 21, thereby protecting the button switch 21.

[0058] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An air intake structure for an air compressor, comprising a cylinder body (1), characterized in that: Both ends of the cylinder body (1) are open. A piston (30) is slidably mounted in the lower part of the cylinder body (1). A driving mechanism is rotatably connected in the piston (30). A detachable cylinder cover (8) is mounted on the upper end of the cylinder body (1). A plug (32) is slidably mounted in the upper part of the cylinder body (1). A center hole (36) is opened in the middle of the upper surface of the cylinder cover (8). A column (22) is inserted in the center hole (36). The lower end of the column (22) extends into the cylinder body (1) and is connected and fixed to the plug (32). A device for detecting the position of the cylinder body (1) is mounted on the outer surface of the cylinder body (1). A pressure sensor (29) for measuring the air pressure in the space between the plug (32) and the piston (30), the pressure sensor (29) being electrically connected to an input end of a PLC controller, an L-shaped plate (9) being mounted on the upper surface of the cylinder cover (8), a vertically arranged driving member (15) being mounted on the upper surface of the horizontal portion of the L-shaped plate (9), an input end of the driving member (15) being electrically connected to an output end of the PLC controller, a movable end of the driving member (15) penetrating the horizontal portion of the L-shaped plate (9) and being connected and fixed to an upper end of a column (22), and an air inlet and outlet mechanism being capable of relative movement with the cylinder cover (8) being inserted on the upper surface of the cylinder cover (8); The air inlet and outlet mechanism comprises a first straight pipe (10), the upper surface of the cylinder head (8) is provided with a first guide hole (35) and a second guide hole (37) which are symmetrically arranged, the first straight pipe (10) is inserted into the first guide hole (35), and the lower end of the first straight pipe (10) passes through the plug (32) and is connected and fixed to the plug (32); A second straight pipe (17) is inserted into the second guide hole (37); the lower end of the second straight pipe (17) passes through the plug (32) and is fixedly connected to the plug (32); the upper end of the first straight pipe (10) is provided with an exhaust valve (11) connected to the compression cylinder (1); the upper end of the second straight pipe (17) is provided with an intake valve (16); the other end of the intake valve (16) is adjacently connected to an air outlet of the air filter (13) through a curved pipe (14).

2. An air compressor intake structure according to claim 1, characterized in that: The upper surface of the plug (32) is provided with two symmetrically arranged first positioning holes (33) and second positioning holes (34); the lower end of the first straight tube (10) is fixed in the first positioning hole (33), and the lower end of the second straight tube (17) is fixed in the second positioning hole (34).

3. The air compressor intake structure according to claim 1, characterized in that: The column (22) is a hollow structure, the lower end of the column (22) is connected and fixed with a round cover (31), the internal space of the column (22) is communicated with the internal space of the round cover (31), the lower end of the round cover (31) is open and connected and fixed with the plug (32), and the round cover (31) and the plug (32) are arranged concentrically; A small hole (38) is provided on the upper surface of the horizontal portion of the L-shaped plate (9), an upper through hole (39) is provided on the upper surface of the horizontal portion of the L-shaped plate (9), a connecting pipe (27) is inserted in the small hole (38), the lower end of the connecting pipe (27) is connected to and communicates with one end of a high-pressure hose (23), the other end of the high-pressure hose (23) is installed on the outer surface of the upper end of the column (22), and the high-pressure hose (23) is communicated with the internal space of the column (22), and the upper end of the connecting pipe (27) passes through the through hole (46) and extends into the water storage cylinder (12); A pressing mechanism for pressing the plug (32) is slidably installed in the water storage cylinder (12).

4. An air compressor intake structure according to claim 3, characterized in that: The holding mechanism comprises a positioning plate (26), the bottom of the water storage cylinder (12) is connected and fixed with the positioning plate (26), the upper surface of the positioning plate (26) is annularly provided with a plurality of fixing holes at equal intervals, one end of the connecting pipe (27) in the water storage cylinder (12) passes through the sealing plug (44) and is connected and fixed to the sealing plug (44), and the sealing plug (44) is slidably installed in the water storage cylinder (12); The upper end of the water storage cylinder (12) is connected and fixed with a cylinder cover (25), and a pressure relief valve (24) is installed in the middle of the upper surface of the cylinder cover (25). The water storage cylinder (12) stores water in the space between the sealing plug (44) and the cylinder cover (25). The upper end of the water storage cylinder (12) is provided with a water inlet (47) on the outer surface, and the end of the water inlet (47) away from the water storage cylinder (12) is threadedly connected with a threaded plug cover (48); A circular hole (45) aligned with the upper through hole (39) is provided in the middle of the lower surface of the positioning plate (26); a pressure rod (28) is inserted into the upper through hole (39); the upper end of the pressure rod (28) passes through the circular hole (45) and is connected and fixed to the sealing plug (44); a lower through hole (40) aligned with the upper through hole (39) is provided on the upper surface of the cylinder cover (8); the lower end of the pressure rod (28) passes through the lower through hole (40) and contacts the upper surface of the plug (32).

5. The air compressor intake structure according to claim 1, characterized in that: The driving mechanism comprises a crank (3), the crank (3) is rotatably connected inside the piston (30), one end of the crank (3) away from the piston (30) extends to the outside of the cylinder body (1) and is connected and fixed with an upper sleeve (6), the upper sleeve (6) is sleeved on the crankshaft (4), a lower sleeve (5) is provided on the lower side of the upper sleeve (6), and the upper sleeve (6) is connected and fixed to the lower sleeve (5) by a plurality of bolts, and the lower sleeve (5) is sleeved on the crankshaft (4).

6. The air compressor intake structure according to claim 1, characterized in that: The upper end of the column rod (22) is sleeved with a support plate (19) connected and fixed to the column rod (22), the lower surface of the support plate (19) is installed with a rod head (20), and a button switch (21) for cutting off the power supply of the air compressor is provided directly below the rod head (20), and the button switch (21) is installed on the upper surface of the cylinder cover (8).

7. The air compressor intake structure according to claim 1, characterized in that: The outer surface of the cylinder body (1) is evenly covered with a plurality of heat dissipation fins (2), the heat dissipation fins (2) and the cylinder body (1) are an integrally formed structure, the outer surface of the lower end of the cylinder body (1) is covered with a connecting ring (7) connected and fixed to the cylinder body (1), and the upper surface of the connecting ring (7) is provided with a plurality of mounting holes for inserting bolts at equal intervals in the form of a ring.

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