A high-pressure airless oil injection device

Abstract

The application discloses a high-pressure airless oil spraying device, which comprises an oil supply mechanism, a pressurizing mechanism, an oil spraying mechanism and a control box, wherein the oil supply mechanism comprises a stainless steel support, an oil amount alarm and an electric paddle, and a glass inner container with a scale is arranged concentrically in the stainless steel support; the pressurizing mechanism comprises a shell, a high-pressure oil pump, an oil pump base, a cylinder, a cylinder base and an electromagnetic valve, and the lower end opening of an oil pump joint is threadedly connected to an oil inlet nozzle of the high-pressure oil pump; the oil spraying mechanism comprises an oil gun, a multidirectional adjusting support, an oil gun socket, a photoelectric switch and an oil gun heating ring; the photoelectric switch, the oil gun and the oil gun heating ring are electrically connected to the oil gun socket respectively; and the oil inlet of the oil gun is connected with an oil outlet nozzle of the high-pressure oil pump through an air pipe. The high-pressure airless oil spraying device is suitable for spraying oil on the inner wall of a syringe cover, has good atomization effect on silicone oil, high spraying performance, good spraying effect, greatly reduces the amount of diluent, and is more conducive to environmental protection.

Description

Technical Field

[0001] This invention relates to a high-pressure airless oil injection device. Background Technology

[0002] In syringe manufacturing, the inner wall of the syringe jacket is pre-coated with silicone oil. This siliconeization process lubricates the piston that pushes the syringe. In existing technology, the silicone oil is dissolved in a diluent, such as Freon, which is low-boiling and volatile. The mixture of silicone oil and diluent is commonly known as "silicification liquid." Then, compressed air is used to spray it into the syringe jacket. The siliconeization process can be carried out on an assembly machine or on a printing machine used in the preceding process. The weight ratio of silicone oil to solvent in the siliconeization liquid generally does not exceed 20:100. After the siliconeization liquid is sprayed into the syringe jacket, the diluent evaporates completely into the workshop space, leaving only silicone oil on the inner wall of the jacket. The solvent (Freon) has a destructive effect on the atmospheric ozone layer, and the evaporated solvent itself is costly.

[0003] Existing spraying equipment uses stainless steel oil tanks with level indicator tubes. The liquid inside is transparent, making it difficult to observe the amount of silicone liquid. Furthermore, replenishing the silicone liquid requires pausing the entire spraying operation, preventing timely replenishment. There is a lack of control over the oil supply between the oil tank and the pressurizing device, meaning the silicone liquid in the tank is in direct contact with the pressurizing device even when not in operation. Spraying requires pressurization, and moisture from the compressed air mixes with the silicone oil, easily emulsifying it. Moreover, the silicone oil requires a large amount of diluent to form a spray. Excessive diluent usage causes the diluent to evaporate and disperse throughout the sprayed mist, polluting the air and harming the environment.

[0004] Airless spraying machines utilize a plunger pump to pressurize the paint, delivering the high-pressure paint through a high-pressure hose to the spray gun. The pressure is then released through the nozzle, atomizing the paint and forming a dense coating on the object's surface. High-pressure airless spraying, as an important category of coating technology, has been widely used in various industries. However, currently, there is no high-pressure airless spraying device suitable for syringe assembly. Furthermore, existing high-pressure airless spraying machines suffer from problems such as excessive size, poor automatic control capabilities, difficulty in guaranteeing spray atomization effects, and inability to spray high-viscosity silicone oils. In particular, the air pressure cannot be quantified, at most down to the second, making precise spraying impossible and significantly hindering the application of high-pressure airless spraying technology in syringe assembly. For example, existing spraying devices, upon receiving a photoelectric signal indicating the product's position, send an execution program to the air and liquid circuit switches of the spray gun (with a delay of 10-20ms), completing the entire spraying operation within 0-100ms. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-pressure airless oil spraying device suitable for spraying oil onto the inner wall of the outer casing of a syringe. It has a good atomization effect on silicone oil, high spraying performance, and good spraying effect, which greatly reduces the amount of diluent used. It can realize a low-solvent or even solvent-free siliconization process, which is of great significance for enterprises to reduce costs, increase efficiency, and protect the environment.

[0006] The technical solution to achieve the above objective is: a high-pressure airless oil injection device, comprising an oil supply mechanism, a pressurization mechanism, an injection mechanism, and a control box, wherein:

[0007] The fuel supply mechanism includes a stainless steel bracket, a fuel level alarm, and an electric paddle. A graduated glass liner is concentrically arranged inside the stainless steel bracket. An alarm housing is welded to the outside of the stainless steel bracket, and the fuel level alarm is snapped into the alarm housing and tightly fitted against the outer wall of the glass liner. A top cover is threaded to the upper end of the stainless steel bracket, and a sealing ring is provided between the top cover and the stainless steel bracket. An air filter is provided on the top cover. A sleeve is threaded into the upper opening of the top cover, and the upper opening of the sleeve... A sleeve cap is internally threaded, and a PTFE dustproof oil seal is provided at the bottom end of the sleeve cap; the electric paddle includes a motor and a paddle connected thereto, the motor is located at the top of the sleeve cap, and the paddle is located inside the glass liner; an oil cup base is threadedly connected to the lower end of the stainless steel bracket, and a filter sealing ring is provided between the lower opening of the glass liner and the oil cup base; an oil valve pin for controlling oil discharge is provided inside the oil cup base, and an oil pump connector is connected to the bottom end of the oil cup base, with the lower end of the oil valve pin inserted into the oil pump connector;

[0008] The pressurizing mechanism includes a housing, a high-pressure oil pump, an oil pump base, a cylinder, a cylinder base, and a solenoid valve. The bottom end of the housing is fixed to the housing base, and the top end of the housing is provided with a housing cover. The oil pump base and the cylinder base are arranged one above the other inside the housing. The oil pump base, the cylinder base, and the housing base are connected by screws and nuts, respectively. The high-pressure oil pump is mounted on the oil pump base, and the cylinder is mounted on the cylinder base. A cylinder-oil pump height-fixing sleeve is provided between the cylinder and the oil pump base. The cylinder piston is connected to the high-pressure oil pump through an oil pump spring. The solenoid valve is mounted on the housing base and is connected to the cylinder's air inlet and exhaust port through a pipeline.

[0009] The lower end of the oil pump connector is threadedly connected to the oil inlet of the high-pressure oil pump, and a retaining spring is provided at the oil inlet of the high-pressure oil pump.

[0010] The oil injection mechanism includes an oil gun, a multi-directional adjustment bracket, an oil gun socket, a photoelectric switch, and an oil gun heating coil. The oil gun is mounted on the multi-directional adjustment bracket via an oil gun protective sleeve. One end of the oil gun protective sleeve has a fixing piece, and the oil gun socket is fixed to the fixing piece. The photoelectric switch is disposed adjacent to the oil gun. The oil gun heating coil is wrapped around the outside of the oil gun's outlet end, and the oil gun heating coil is covered by a heating coil protective sleeve. The photoelectric switch, oil gun, and oil gun heating coil are electrically connected to the oil gun socket.

[0011] The oil inlet of the oil gun is connected to the oil outlet of the high-pressure oil pump via an air pipe; and a pressure gauge is installed on the oil outlet of the high-pressure oil pump.

[0012] The motor, oil level alarm, solenoid valve, pressure gauge, and oil gun socket of the electric propeller are respectively connected to the control box.

[0013] In the aforementioned high-pressure airless oil injection device, the upper cover is provided with a filter mounting hole, and the air filter is threadedly connected to the filter mounting hole;

[0014] The electric propeller also includes a motor housing, a propeller flange, and a ball bearing. The motor is mounted inside the motor housing with screws, and the propeller flange is connected to the output end of the motor with screws. The ball bearing is located inside the sleeve cover. The tail end of the propeller passes through the ball bearing and is engaged in the propeller mounting hole on the propeller flange. A retaining spring is provided between the tail end of the propeller and the lower end of the propeller flange. The motor drives the propeller flange to rotate, thereby driving the propeller to rotate.

[0015] In the aforementioned high-pressure airless oil injection device, the oil cup base has a through-hole in the middle, and a rubber ring is provided between the top of the oil valve pin and the oil cup base. The lower end of the oil valve pin passes through the through-hole in the middle of the oil cup base and is inserted into the oil pump connector. An oil valve retaining ring is installed in the middle of the oil valve pin, and a spring is sleeved on the outside of the oil valve pin, with the spring located above the retaining ring. A rubber pad is sleeved on the spring, and the rubber pad is located inside the oil pump connector. The retaining ring is tightly attached to the retaining ring baffle.

[0016] When the oil is supplied, the bottom end of the oil pump connector is in close contact with the stepped surface of the oil inlet of the high-pressure oil pump, and the top end of the oil valve pin is away from the top end of the oil passage hole; when the oil is not supplied, there is a gap between the bottom end of the oil pump connector and the stepped surface of the oil inlet of the high-pressure oil pump, and the top end of the oil valve pin is blocked at the top end of the oil passage hole.

[0017] In the aforementioned high-pressure airless oil injection device, the oil pump base, cylinder base, and housing base are fixed by four screws. Each screw passes through the oil pump base, cylinder base, and housing base sequentially from top to bottom, and the screws are fastened to the oil pump base, the cylinder base, and the housing base by nuts.

[0018] In the aforementioned high-pressure airless oil injection device, the high-pressure oil pump is a plunger pump, and a pressure switch is also provided on the oil outlet of the high-pressure oil pump. A hand slide valve, a pressure reducing valve, and a cylinder pressure gauge are provided on the air inlet of the cylinder, and the pressure reducing valve is mounted on the outer wall of the housing via a pressure reducing valve bracket.

[0019] The aforementioned high-pressure airless oil injection device, wherein the multi-directional adjusting bracket includes a transverse adjusting flange, a longitudinal adjusting flange, a height adjusting rod, a height adjusting sleeve, and a radial adjusting sleeve; wherein:

[0020] The transverse adjusting flange has a transverse waist hole, and the longitudinal adjusting flange has a longitudinal waist hole; the longitudinal adjusting flange is disposed on the transverse adjusting flange, and the longitudinal waist hole of the longitudinal adjusting flange is connected to the transverse adjusting flange by screws.

[0021] The bottom end of the height adjustment sleeve is welded to the longitudinal adjustment flange, and a number of screw holes are sequentially opened on the side wall of the height adjustment sleeve from top to bottom;

[0022] The height adjustment rod is rotatably fitted into the height adjustment sleeve, and the height adjustment rod is adjusted and locked by engaging with screws and any screw holes on the height adjustment sleeve;

[0023] The lower end of the radial adjustment sleeve is mounted on the top of the height adjustment rod in a swinging manner. The height adjustment rod is covered with a fixing ring, and the fixing ring is located below the radial adjustment sleeve.

[0024] The bottom end of the oil gun protective sleeve is welded to the top end of the radial adjustment sleeve.

[0025] In the aforementioned high-pressure airless oil injection device, the top end of the oil gun protective sleeve is provided with an oil gun mounting groove, and the oil gun is inserted longitudinally into the oil gun mounting groove and secured with screws.

[0026] The fixing plate has a socket mounting hole, and the oil gun socket is disposed in the socket mounting hole;

[0027] The heating coil protective sleeve is locked to the oil gun by screws.

[0028] In the aforementioned high-pressure airless oil injection device, the top end of the height adjusting rod is provided with a radial adjusting sleeve mounting groove that extends from front to back. The groove wall of the radial adjusting sleeve mounting groove is provided with a through hole that extends from left to right. The lower end of the radial adjusting sleeve is provided with a rotating shaft insertion hole that extends from left to right. The lower end of the radial adjusting sleeve is inserted into the radial adjusting sleeve mounting groove, and a rotating shaft is inserted into the through hole on the groove wall of the radial adjusting sleeve mounting groove and the rotating shaft insertion hole. The radial adjusting sleeve swings back and forth along the rotating shaft.

[0029] In the aforementioned high-pressure airless oil injection device, the control box is equipped with an oil pressure signal indicator, an oil level signal indicator, an emergency stop button, a power switch, and a touch screen.

[0030] In the aforementioned high-pressure airless oil injection device, the glass liner is filled with silicifying liquid, the control box controls the operation of the motor, and the motor drives the paddle to rotate to prevent the silicifying liquid in the glass liner from separating.

[0031] The oil level alarm monitors the level of the siliconized liquid in the glass liner in real time and sends the siliconized liquid level signal back to the control box, and the oil level is indicated by the oil level indicator light.

[0032] The pressure gauge monitors the oil pressure at the outlet of the high-pressure oil pump in real time and sends the oil pressure signal back to the control box, and the oil pressure is indicated by the oil pressure signal indicator.

[0033] When the photoelectric switch senses the passing of the product to be coated, it sends a photoelectric signal to the control box. When the control box receives the photoelectric signal indicating that the product has arrived, it sends an execution signal to the solenoid valve. The solenoid valve opens, and the cylinder drives the high-pressure oil pump to move, transporting the siliconized liquid in the glass liner to the oil gun through the high-pressure oil pump and air pipe. The oil gun completes the oil spraying in 300-400μs.

[0034] The high-pressure airless oil spraying device of the present invention is suitable for spraying oil onto the inner wall of the outer casing of a syringe. It has a good atomization effect on silicone oil, high spraying performance, and good spraying effect, which greatly reduces the amount of diluent used. It can realize a low-solvent or even solvent-free siliconization process, which is of great significance for enterprises to reduce costs, increase efficiency, and protect the environment. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of the high-pressure airless oil injection device of the present invention;

[0036] Figure 2 This is a three-dimensional structural diagram of the oil supply mechanism (front view).

[0037] Figure 3 A three-dimensional structural diagram of the oil supply mechanism (viewed from below);

[0038] Figure 4 This is a cross-sectional view of the oil supply mechanism;

[0039] Figure 5 This is an exploded view of the oil supply mechanism;

[0040] Figure 6 A three-dimensional structural diagram of the sleeve cover of the oil supply mechanism;

[0041] Figure 7 This is a front view of the sleeve cover of the oil supply mechanism;

[0042] Figure 8 A sectional view of the sleeve cover of the oil supply mechanism along line AA;

[0043] Figure 9 An exploded view of the electric propeller of the oil supply mechanism;

[0044] Figure 10 This is a schematic diagram (front view) showing the connection between the oil valve pin, oil cup base, and high-pressure oil pump.

[0045] Figure 11 This is a schematic diagram (viewed from below) showing the connection between the oil valve pin, oil cup base, and high-pressure oil pump.

[0046] Figure 12 This is a schematic diagram of the operation of the oil valve pin.

[0047] Figure 13 This is a diagram of the external structure of the pressurization mechanism;

[0048] Figure 14 This is a diagram of the internal structure of the pressurization mechanism;

[0049] Figure 15 A schematic diagram showing the connection of the high-pressure oil pump, cylinder, and solenoid valve of the pressurization mechanism;

[0050] Figure 16 This is a three-dimensional structural diagram of the fuel injection mechanism;

[0051] Figure 17 This is a schematic diagram showing the installation of the fuel gun heating coil in the fuel injection mechanism.

[0052] Figure 18 An exploded view of the multi-directional adjustment bracket of the fuel injection mechanism;

[0053] Figure 19 A schematic diagram showing the connection between the oil gun, oil gun protective sleeve, and fixing plate;

[0054] Figure 20 This is a diagram of the external structure of the control box;

[0055] Figure 21This is a schematic diagram illustrating the working principle of the high-pressure airless oil injection device of the present invention. Detailed Implementation

[0056] To enable those skilled in the art to better understand the technical solution of the present invention, its specific embodiments are described in detail below with reference to the accompanying drawings:

[0057] Please see Figures 1 to 21 According to the preferred embodiment of the present invention, a high-pressure airless oil injection device includes an oil supply mechanism 1, a pressurization mechanism 2, an oil injection mechanism 3, and a control box 4.

[0058] Please see again Figures 2 to 12 The oil supply mechanism 1 includes a stainless steel bracket 17, an oil level alarm 19, and an electric paddle. A graduated glass liner 18 is concentrically arranged inside the stainless steel bracket 17. An alarm housing 110 is welded to the outside of the stainless steel bracket 17. The oil level alarm 19 is snapped into the alarm housing 110 and tightly fitted against the outer wall of the glass liner 18. The oil level alarm 19 is used to monitor the liquid level inside the glass liner 18 in real time. A top cover 15 is threaded to the upper end of the stainless steel bracket 17, and a sealing ring 16 is provided between the top cover 15 and the stainless steel bracket 17. An air filter 14 is provided on the top cover 15. Specifically, a filter mounting hole is provided on the top cover 15, and the air filter 14 is threaded into the filter mounting hole. The air filter 14 has a 0.2-micron pore size to filter dust in the air and prevent bacterial contamination. The upper opening of the cover 15 is internally threaded to a sleeve 13, and the upper opening of the sleeve 13 is internally threaded to a sleeve cap 11. The bottom end of the sleeve cap 11 is provided with a PTFE dustproof oil seal 12. Specifically, the bottom end of the sleeve cap 11 has a groove a, and the PTFE dustproof oil seal 12 is located in the groove a. The lower end of the stainless steel bracket 17 is threaded to an oil cup base 112. A filter sealing ring 111 is provided between the lower opening of the glass inner liner 18 and the oil cup base 112. The filter sealing ring 111 has a 300-mesh filtration effect, which can filter out particulate matter in the silicide liquid, making the silicide liquid supplied to the high-pressure oil pump of better quality.

[0059] The top cover 15 and the oil cup base 112 are connected by threads in the stainless steel bracket 17, at which time the graduated glass liner 18 is firmly fixed inside the stainless steel bracket 17.

[0060] The electric propeller includes a motor 114 and a propeller blade 117 connected thereto, as well as a motor housing 113, a propeller flange 115, and a ball bearing 116. The motor 114 is located at the top of the sleeve cover 11, and the propeller blade 117 is located inside the glass inner liner 18. The motor 114 is installed in the motor housing 113 by screws, and the propeller flange 115 is connected to the output end of the motor 114 by screws. The ball bearing 116 is located inside the sleeve cover 11. Specifically, the upper end of the sleeve cover 11 has a groove b, and the ball bearing 116 is located in the groove b. The tail end of the propeller blade 117 passes through the ball bearing 116 and is engaged in the propeller mounting hole d on the propeller flange 115. The shape of the tail end of the propeller blade 117 is adapted to the shape of the propeller mounting hole d. For example, if the tail end of the propeller blade 117 is square, the propeller mounting hole d is also square. A slot c is provided at the tail end of the blade 117, and a retaining spring 119' is provided in the slot c. The retaining spring 119' is located at the lower end of the blade flange 115. The motor 114 drives the blade flange 115 to rotate, thereby driving the blade 117 to rotate.

[0061] The glass inner liner 18 is used to hold the silicide solution. When the silicide solution is left for a long time, it is easy for the silicone oil and diluent to separate due to their different specific gravities. The stirring of the electric paddle helps to maintain a uniform mixture between the two. The motor 114 is preferably a quick-connect brushless motor with electrical separation. When the silicide solution level in the glass inner liner 18 is too low, the motor 114 can be stopped, the top cover 15 can be unscrewed, and the silicide solution can be added to the glass inner liner 18 at any time without stopping the entire oil spraying device, making replenishment more convenient.

[0062] An oil valve pin 118 for controlling oil discharge is provided inside the oil cup base 112. An oil pump connector 124 is connected to the bottom end of the oil cup base 112, and the lower end of the oil valve pin 118 is inserted into the oil pump connector 124. Specifically, an oil passage hole is provided in the middle of the oil cup base 12, and a rubber ring 120 is provided between the top end of the oil valve pin 118 and the oil cup base 112. Specifically, a rubber ring mounting groove e is provided at the top end of the oil passage hole of the oil cup base 112, and the rubber ring 120 is placed in the rubber ring mounting groove e. The lower end of the oil valve pin 118 passes through the oil passage hole in the middle of the oil cup base 112 and is inserted into the oil pump connector 124; the middle part of the oil valve pin 118 has an oil valve retaining ring mounting groove f, and an oil valve retaining ring 119 is installed in the oil valve retaining ring mounting groove f. A spring 122 is sleeved on the outside of the oil valve pin 118, and the spring 122 is located above the oil valve retaining ring 119; a rubber pad 123 is sleeved on the spring 118, and the rubber pad 123 is located inside the oil pump connector 124; the bottom end of the oil cup base 112 has an oil pump connector mounting hole g, and the upper end of the oil pump connector 124 is set in the oil pump connector mounting hole g.

[0063] The lower end of the oil pump connector 124 is threadedly connected to the oil inlet 220 of the high-pressure oil pump 21, and a retaining ring 22 is provided at the oil inlet 220 of the high-pressure oil pump 21; the oil valve retaining ring 119 is tightly attached to the retaining ring 22.

[0064] Please see again Figure 12 When the oil is supplied, rotate the oil pump connector 124 downwards so that the bottom end of the oil pump connector 124 is in close contact with the stepped surface of the oil inlet of the high-pressure oil pump 21. The oil cup base 112 moves downwards along with the oil pump connector 124, and the top end of the oil valve pin 118 leaves the top end of the oil passage hole, opening the oil passage hole. The silicified liquid in the glass liner 18 enters the high-pressure oil pump 21 through the oil passage hole. When the oil is not supplied, rotate the oil pump connector 124 upwards. The oil cup base 112 moves upwards along with the oil pump connector 124 so that there is a 2mm gap between the bottom end of the oil pump connector 124 and the stepped surface of the oil inlet of the high-pressure oil pump 21. The top end of the oil valve pin 118 blocks the top end of the oil passage hole, closing the oil passage hole. The silicified liquid in the glass liner 18 cannot enter the high-pressure oil pump 21.

[0065] Please see again Figures 13 to 15 The pressurizing mechanism 2 includes a housing 211, a high-pressure oil pump 21, an oil pump base 23, a cylinder 24, a cylinder base 25, and a solenoid valve 26. The bottom end of the housing 211 is fixed on the housing base 212, and the top end of the housing 21 is provided with a housing cover 210. The oil pump base 23 and the cylinder base 25 are arranged one above the other inside the housing 211. The oil pump base 23, the cylinder base 25, and the housing base 212 are connected by screws 28 and nuts 27, respectively. Specifically, the oil pump base 23, the cylinder base 25, and the housing base 212 are fixed by four screws 28. Each screw 28 passes through the oil pump base 23, the cylinder base 25, and the housing base 212 from top to bottom, and the screws 28 are fastened to the oil pump base 23, the cylinder base 25, and the housing base 212 by nuts 27, respectively.

[0066] The high-pressure oil pump 21 is mounted on the oil pump base 23, and the cylinder 24 is mounted on the cylinder base 25; a cylinder oil pump height fixing sleeve 29 is provided between the cylinder 24 and the oil pump base 25; the cylinder piston 241 of the cylinder 24 is connected to the high-pressure oil pump 21 through the oil pump spring 231; the solenoid valve 26 is mounted on the outer casing base 212, and the solenoid valve 26 is connected to the air inlet 242 and the exhaust port 243 of the cylinder 24 through a pipeline (not shown in the figure);

[0067] The oil inlet 352 of the oil gun 35 is connected to the oil outlet 221 of the high-pressure oil pump 21 via an air pipe 30. A pressure gauge 213 and a pressure switch 214 are installed on the oil outlet 221 of the high-pressure oil pump 21. A manual sliding valve 215, a pressure reducing valve 217, and a cylinder pressure gauge 216 are installed on the air inlet 242 of the cylinder 24. The pressure reducing valve 217 is mounted on the outer wall of the housing 211 via a pressure reducing valve bracket 219. The pressure gauge 213 is used to monitor the pressure at the oil outlet 221 in real time. A socket 218 is installed on the housing 211, and the socket 218 is electrically connected to the cylinder 24.

[0068] The high-pressure oil pump 21 is a plunger pump with a pressure selection of 10-15 MPa. The cylinder 24 drives the plunger pump. When the cylinder area is 32 times that of the plunger pump area, the liquid pressure inside the high-pressure oil pump 21 can be increased by about 32 times. Under high pressure, it can be used for pressurized injection of high-viscosity liquids, which can significantly reduce the amount of diluent used in the silicide solution, and is more conducive to energy saving and environmental protection.

[0069] Please see again Figures 16 to 19 The oil injection mechanism 3 includes an oil gun 35, a multi-directional adjustment bracket, an oil gun socket 37, a photoelectric switch 38, and an oil gun heating coil 39. The oil gun 35 is mounted on the multi-directional adjustment bracket via an oil gun protective sleeve 36. Specifically, the multi-directional adjustment bracket includes a transverse adjustment flange 31, a longitudinal adjustment flange 32, a height adjustment rod 34, a height adjustment sleeve 33, and a radial adjustment sleeve 311. The transverse adjustment flange 31 has a transverse slot, and the longitudinal adjustment flange 32 has a longitudinal slot. The longitudinal adjustment flange 32 is mounted on the transverse adjustment flange 31, and the longitudinal slot of the longitudinal adjustment flange 32 is fixed by screws. On the transverse adjusting flange 31, the transverse slots of the transverse adjusting flange 31 are connected to the external equipment by screws. By adjusting the position of each screw in the longitudinal and transverse slots, the front-back, left-right, and right-side positions of the longitudinal adjusting flange 32 are adjusted. The bottom end of the height adjusting sleeve 33 is welded to the longitudinal adjusting flange 32. Several screw holes 331 are sequentially opened from top to bottom on the side wall of the height adjusting sleeve 33. The height adjusting rod 34 is rotatably fitted into the height adjusting sleeve 33, and the height adjusting rod 34 is adjusted and locked by the cooperation of screws 341 and any screw hole 331 on the height adjusting sleeve 33. The height adjusting rod 34 rotates in the height adjusting sleeve 33 to achieve horizontal rotation adjustment. The installation position of the height adjusting rod 34 in the height adjusting sleeve 33 is adjusted by the screw holes 331 and screws to achieve height adjustment.

[0070] The lower end of the radial adjustment sleeve 311 is mounted on the top of the height adjustment rod 34, which can swing back and forth. The height adjustment rod 34 is covered with a fixing ring 312, which is located below the radial adjustment sleeve 311. Specifically, the top of the height adjustment rod 34 has a radial adjustment sleeve mounting groove 342 that runs through the front and back. The groove wall of the radial adjustment sleeve mounting groove 342 has a through hole 343 that runs through the left and right. The lower end of the radial adjustment sleeve 311 has a rotating shaft insertion hole 344 that runs through the left and right. The lower end of the radial adjustment sleeve 311 is inserted into the radial adjustment sleeve mounting groove 342, and a rotating shaft is inserted into the through hole 343 and the rotating shaft insertion hole 344 on the groove wall of the radial adjustment sleeve mounting groove. The radial adjustment sleeve 311 swings back and forth along the rotating shaft.

[0071] The bottom end of the oil gun protective sleeve 36 is welded to the top end of the radial adjustment sleeve 311.

[0072] The top of the oil gun protective sleeve 36 has an oil gun mounting groove i, into which the oil gun 35 is inserted longitudinally and secured with screws. The rear end of the oil gun protective sleeve 36 has a fixing plate mounting screw hole 361. The front end of the fixing plate 313 is fixed to the fixing plate mounting screw hole 361 with screws. The rear end of the fixing plate 313 has a socket mounting hole 345, into which the oil gun socket 37 is located. A photoelectric switch 38 is disposed adjacent to the oil gun 35. An oil gun heating coil 39 is wound around the outside of the outlet end of the oil gun 35. The oil gun heating coil 39 is covered by a heating coil protective sleeve 310, which is locked to the oil gun 35 with screws. The photoelectric switch 38, the oil gun 35, and the oil gun heating coil 39 are electrically connected to the oil gun socket 37.

[0073] The heating coil 39 heats the oil gun 35, keeping the liquid temperature inside constant and reducing the impact of temperature on viscosity. The heating coil 39 can employ a PID electric heating device, a PTC heating device, an infrared heating device, or a heat transfer oil heating device, with a temperature accuracy of ±1℃. Heating stops if the temperature exceeds the fluctuation value. Since the viscosity of silicone oil varies with temperature, the heating coil 39 and other temperature-regulating devices help maintain the silicone oil temperature at 40 degrees Celsius, controlling its viscosity and precisely controlling the injection volume, ensuring a constant temperature throughout the entire operation.

[0074] The outlet end of the oil gun 35 is provided with 3-36 evenly distributed nozzle holes 351: the diameter of each nozzle hole 351 is 0.1-0.3mm, and the number of nozzle holes is related to the size of the injection.

[0075] The electric propeller motor 114, oil level alarm 19, solenoid valve 26, pressure gauge 213 and oil gun socket 37 are respectively connected to the control box 4.

[0076] Please see again Figure 20The control box 4 is equipped with an oil pressure signal indicator 41, an oil level signal indicator 42, an emergency stop button 43, a power switch 44, and a touch screen 45 on its side wall.

[0077] Please see Figure 21 The high-pressure airless oil injection device of the present invention, when the entire device is powered on, the PLC in the control box 4 is powered on and runs, and the process parameters are set through the touch screen 45, such as setting the oil pressure limit value and the oil level limit value. The glass inner liner 18 is filled with silicifying liquid. The control box 4 controls the motor 114 to work, and the motor 114 drives the blade 117 to rotate to prevent the silicifying liquid in the glass inner liner 18 from separating. The oil level alarm 19 monitors the level of the siliconized liquid in the glass inner liner 18 in real time and sends the siliconized liquid level signal to the control box 4. The oil level is indicated by the oil level indicator light 42. For example, when the oil level is higher than the set value, the oil level indicator light 42 shows green. When the oil level is lower than the set value, the oil level alarm 19 alarms and the oil level indicator light 42 shows red. After seeing the alarm signal, the operator can stop the motor 114 and directly open the top cover 15 to add siliconized liquid to the glass inner liner 18. The pressure gauge 213 monitors the oil pressure at the outlet 221 of the high-pressure oil pump 21 in real time and sends the oil pressure value signal to the control box 4. The oil pressure is indicated by the oil pressure indicator light 41. For example, when the oil pressure is greater than or equal to the set value of 10MPa, the oil pressure is normal and the oil pressure indicator light 41 shows green. When the oil pressure is less than the set value of 10MPa, the oil pressure is abnormal and the oil pressure indicator light 41 shows red.

[0078] When the photoelectric switch 38 senses the passing of the product to be coated, the photoelectric switch 38 sends a photoelectric signal to the control box 4 through the oil gun socket 37. When the control box 4 receives the photoelectric signal that the product has arrived, it sends an execution signal to the solenoid valve 26. The solenoid valve 26 opens, and the cylinder 24 drives the high-pressure oil pump 21 to move, transporting the siliconized liquid in the glass liner 18 to the oil gun 35 through the high-pressure oil pump 21 and the air pipe 30. The oil gun 35 completes the oil spraying in 300-400μs.

[0079] In summary, the high-pressure airless oil spraying device of the present invention is suitable for spraying oil onto the inner wall of the syringe jacket. It has good atomization effect on silicone oil, high spraying performance, and good spraying effect, which greatly reduces the amount of diluent used. It can realize solvent-free or even solvent-free siliconization process, which is of great significance for enterprises to reduce costs, increase efficiency, and protect the environment.

[0080] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any variations or modifications to the above embodiments that are within the spirit and essence of the present invention will fall within the scope of the claims of the present invention.

Claims

1. A high pressure airless oil injection device, characterized by, The oil supply mechanism, the pressurizing mechanism, the oil injection mechanism and the control box are included, wherein: The oil supply mechanism includes a stainless steel support, an oil amount alarm and an electric paddle, a glass liner with a scale is concentrically arranged in the stainless steel support, an alarm housing is welded to the outer side of the stainless steel support, the oil amount alarm is clamped in the alarm housing and closely abuts the outer wall of the glass liner, an upper cover is threadedly connected to the upper end of the stainless steel support, a sealing ring is arranged between the connection of the upper cover and the stainless steel support, an air filter is arranged on the upper cover, a sleeve is threadedly connected in the upper end opening of the upper cover, a sleeve cover is threadedly connected in the upper end opening of the sleeve, a Teflon dustproof oil seal is arranged at the bottom end of the sleeve cover, the electric paddle includes a motor and a paddle connected to the motor, the motor is arranged at the top end of the sleeve cover and the paddle is arranged in the glass liner, an oil cup base is threadedly connected to the lower end of the stainless steel support, a filter sealing ring is arranged between the lower end opening of the glass liner and the oil cup base, an oil valve thimble for controlling oil discharge is arranged in the oil cup base, an oil pump connector is connected to the bottom end of the oil cup base and the lower end of the oil valve thimble is inserted into the oil pump connector; The pressurizing mechanism includes a housing, a high-pressure oil pump, an oil pump base, a cylinder, a cylinder base and a solenoid valve, the bottom end of the housing is fixed on a housing base, the top end of the housing is provided with a housing upper cover, the oil pump base and the cylinder base are arranged one above the other in the housing, the oil pump base, the cylinder base and the housing base are connected by a screw rod and a nut respectively, the high-pressure oil pump is arranged on the oil pump base, the cylinder is arranged on the cylinder base, a cylinder oil pump fixed height sleeve is arranged between the cylinder and the oil pump base, the cylinder piston of the cylinder is connected with the high-pressure oil pump through an oil pump spring, the solenoid valve is arranged on the housing base, the solenoid valve is connected with the air inlet and the air outlet of the cylinder through a pipeline; The lower end opening of the oil pump connector is threadedly connected to the oil inlet nozzle of the high-pressure oil pump and a snap spring stopper is arranged at the oil inlet nozzle of the high-pressure oil pump; The oil injection mechanism includes an oil gun, a multi-directional adjusting support, an oil gun socket, a photoelectric switch and an oil gun heating ring, the oil gun is arranged on the multi-directional adjusting support through an oil gun protection sleeve, a fixed sheet is arranged at one end of the oil gun protection sleeve, the oil gun socket is fixed on the fixed sheet, the photoelectric switch is arranged adjacent to the oil gun, the oil gun heating ring is wound outside the outlet end of the oil gun, the oil gun heating ring is sleeved with a heating ring protection sleeve, the photoelectric switch, the oil gun and the oil gun heating ring are respectively electrically connected to the oil gun socket; The oil inlet of the oil gun is connected with the oil outlet nozzle of the high-pressure oil pump through an air pipe and a pressure gauge is arranged on the oil outlet nozzle of the high-pressure oil pump; The motor of the electric paddle, the oil amount alarm, the solenoid valve, the pressure gauge and the oil gun socket are respectively connected with the control box.

2. A high pressure oil-less injection device according to claim 1, characterized in that A filter mounting hole is formed in the upper cover and the air filter is threadedly connected in the filter mounting hole. The electric paddle further comprises a motor shell, a paddle flange and a ball bearing, the motor is installed in the motor shell by screws, the paddle flange is connected with the output end of the motor by screws, and the ball bearing is arranged in the sleeve cover; the tail end of the paddle is clamped in the paddle mounting hole on the paddle flange after passing through the ball bearing, and a snap spring is arranged between the tail end of the paddle and the lower end of the paddle flange; the motor drives the paddle flange to rotate, and then drives the paddle to rotate.

3. A high pressure oil-less injection device according to claim 1, wherein An oil passage through hole is formed in the middle of the oil cup base, a rubber ring is arranged between the top end of the oil valve thimble and the oil cup base, and the lower end of the oil valve thimble is inserted into the oil pump connector through the oil passage through hole in the middle of the oil cup base; an oil valve snap spring is mounted on the middle part of the oil valve thimble, a spring is sleeved on the outside of the oil valve thimble, and the spring is located above the oil valve snap spring; a rubber pad is sleeved on the spring, and the rubber pad is located in the oil pump connector; the oil valve snap spring is tightly attached to the snap spring stopper; In the oil supply state, the bottom end of the oil pump connector is tightly attached to the stepped surface of the oil inlet nozzle of the high-pressure oil pump, and the top end of the oil valve thimble is away from the top end of the oil passage through hole; in the non-oil supply state, there is a gap between the bottom end of the oil pump connector and the stepped surface of the oil inlet nozzle of the high-pressure oil pump, and the top end of the oil valve thimble is blocked in the top end of the oil passage through hole.

4. A high pressure oil-less injection device according to claim 1, wherein The oil pump base, the cylinder base and the shell base are fixed by four screw rods, each screw rod passes through the oil pump base, the cylinder base and the shell base from top to bottom, and the screw rod is fastened with the oil pump base, the cylinder base and the shell base by nuts respectively.

5. A high pressure oil-less injection device according to claim 1, wherein The high-pressure oil pump adopts a plunger pump, a pressure switch is arranged on the oil outlet nozzle of the high-pressure oil pump, a hand slide valve, a pressure reducing valve and a cylinder pressure gauge are arranged on the air inlet of the cylinder, and the pressure reducing valve is arranged on the outer side wall of the shell through a pressure reducing valve support.

6. A high pressure oil-less injection device according to claim 1, wherein The multi-directional adjusting support comprises a transverse adjusting flange, a longitudinal adjusting flange, a height adjusting rod, a height adjusting sleeve and a radial adjusting sleeve; wherein: A transverse waist hole is formed in the transverse adjusting flange, and a longitudinal waist hole is formed in the longitudinal adjusting flange; the longitudinal adjusting flange is arranged on the transverse adjusting flange, and the longitudinal waist hole of the longitudinal adjusting flange is connected with the transverse adjusting flange by screws; The bottom end of the height adjusting sleeve is welded on the longitudinal adjusting flange, and a plurality of screw holes are formed in the sidewall of the height adjusting sleeve from top to bottom; The height adjusting rod is rotatably sleeved in the height adjusting sleeve, and the height adjusting rod is adjusted in height and locked by cooperating with any screw hole on the height adjusting sleeve through screws; The lower end of the radial adjusting sleeve is swingably mounted on the top end of the height adjusting rod, the height adjusting rod is sleeved with a fixing ring, and the fixing ring is located below the radial adjusting sleeve; The bottom end of the oil gun protection sleeve is welded on the top end of the radial adjusting sleeve.

7. A high pressure oil-less injection device according to claim 6, characterized in that The top end of the oil gun protective sleeve is provided with an oil gun mounting groove, and the oil gun is longitudinally inserted into the oil gun mounting groove and fastened by screws; The fixing sheet is provided with a socket mounting hole, and the oil gun socket is arranged in the socket mounting hole; The heating ring protective sleeve is locked with the oil gun by screws.

8. A high pressure oil-less injection device according to claim 6, wherein The top end of the height adjusting rod is provided with a front-to-back through radial adjusting sleeve mounting groove, the groove wall of the radial adjusting sleeve mounting groove is provided with a left-to-right through through hole, and the lower end of the radial adjusting sleeve is provided with a left-to-right through rotating shaft insertion hole; the lower end of the radial adjusting sleeve is inserted into the radial adjusting sleeve mounting groove, the through hole in the groove wall of the radial adjusting sleeve mounting groove and the rotating shaft insertion hole are inserted with a rotating shaft, and the radial adjusting sleeve swings along the rotating shaft.

9. A high pressure oil-less injection device according to claim 1, wherein The side wall of the control box is provided with an oil pressure signal indicator, an oil level signal indicator, an emergency stop button, a power switch and a touch screen.

10. A high pressure oil-less injection device according to claim 9, characterized in that The glass liner is filled with siliconized liquid, the control box controls the motor to work, the motor drives the paddle to rotate, and the siliconized liquid in the glass liner is prevented from being stratified; The oil amount alarm monitors the liquid level of the siliconized liquid in the glass liner in real time, feeds back the siliconized liquid level signal to the control box, and indicates the oil level through the oil level signal indicator; The pressure gauge monitors the oil pressure value at the oil outlet nozzle of the high-pressure oil pump in real time, feeds back the oil pressure value signal to the control box, and indicates the oil pressure through the oil pressure signal indicator; When the photoelectric switch senses that the product to be sprayed passes, the photoelectric switch sends a photoelectric signal to the control box, the control box sends an execution signal to the electromagnetic valve when receiving the photoelectric signal of the product in place, the electromagnetic valve is opened, the air cylinder drives the high-pressure oil pump to move, the siliconized liquid in the glass liner is transported to the oil gun through the high-pressure oil pump and the air pipe, and the oil gun completes oil spraying in 300-400μs.

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