A fuel supply mechanism for a high-pressure airless fuel injection device

Abstract

This invention discloses a fuel supply mechanism for a high-pressure airless fuel injection device, comprising a stainless steel bracket, a fuel level alarm, and an electric paddle. A graduated glass inner liner is concentrically arranged within the stainless steel bracket. A top cover is threadedly connected to the upper end of the stainless steel bracket. An air filter is mounted on the top cover. A sleeve is threadedly connected to the upper opening of the top cover, and a sleeve cap is threadedly connected to the upper opening of the sleeve. The electric paddle includes a motor and a connected blade; the motor is located at the top of the sleeve cap, and the blade is positioned inside the glass inner 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 inner liner and the oil cup base. An oil valve pin for controlling fuel discharge is located inside the oil cup base. The fuel supply mechanism of this invention, using a glass inner liner for easy observation of the liquid level, has a stirring function to prevent stratification of the siliconized liquid, achieves zero-residue connection with a high-pressure oil pump, and also provides a filtering effect.

Description

Technical Field

[0001] This invention relates to an oil supply mechanism for 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 silanizing liquid. Furthermore, replenishing silanizing liquid requires pausing the entire spraying operation, making it impossible to replenish the silanizing oil in a timely manner. There is a lack of components to control the oil supply between the oil tank and the pressurizing device, so the silanizing liquid in the oil tank is in direct contact with the pressurizing device when not in operation. The oil tank does not have a filtration function, and bacteria from the air entering it will contaminate the silanizing liquid inside, affecting the quality of the silanizing liquid supplied to the pressurizing device. In addition, the oil tank lacks a stirring device, and the silanizing liquid is prone to separation after being left for a long time. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects of the prior art and provide an oil supply mechanism for a high-pressure airless oil injection device, which is suitable for spraying oil onto the inner wall of the syringe jacket. It uses a glass inner liner for easy observation of the liquid level, has a stirring function to prevent the silanized liquid from separating, can achieve zero-residue docking with a high-pressure oil pump, and also has a filtering effect.

[0005] The technical solution to achieve the above objective is: a fuel supply mechanism for a high-pressure airless fuel injection device, comprising a stainless steel bracket, a fuel level alarm, and an electric paddle, wherein:

[0006] The stainless steel bracket has a graduated glass inner liner concentrically arranged inside;

[0007] An alarm housing is welded to the outside of the stainless steel bracket, and the oil level alarm is snapped into the alarm housing and closely attached to the outer wall of the glass inner liner.

[0008] The upper end of the stainless steel bracket is threaded with a top cover, and a sealing ring is provided between the top cover and the stainless steel bracket.

[0009] An air filter is provided on the upper cover;

[0010] The upper opening of the cover is internally threaded to a sleeve, the upper opening of the sleeve is internally threaded to a sleeve cap, and the bottom end of the sleeve cap is provided with a PTFE dustproof oil seal.

[0011] The electric propeller includes a motor and a propeller connected thereto. The motor is located at the top of the sleeve cover, and the propeller is located inside the glass liner.

[0012] The lower end of the stainless steel bracket is threadedly connected to an oil cup base, and a filter sealing ring is provided between the lower opening of the glass inner liner and the oil cup base.

[0013] The oil cup base is equipped with an oil valve pin for controlling oil discharge. The bottom end of the oil cup base is connected to an oil pump connector, and the lower end of the oil valve pin is inserted into the oil pump connector.

[0014] In the oil supply mechanism of the high-pressure airless oil injection device described above, a filter mounting hole is provided on the upper cover, and the air filter is threadedly connected to the filter mounting hole.

[0015] The oil supply mechanism of the aforementioned high-pressure airless oil injection device includes an electric propeller that further comprises a motor housing, a propeller flange, and a ball bearing. The motor is mounted in the motor housing by screws, and the propeller flange is connected to the output end of the motor by screws. The ball bearing is disposed 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.

[0016] In the oil supply mechanism of the high-pressure airless oil injection device described above, the bottom end of the sleeve cover is provided with an oil seal groove, and the PTFE dustproof oil seal is disposed in the oil seal groove; the upper end of the sleeve cover is provided with a bearing groove, and the ball bearing is disposed in the bearing groove; the bearing groove is connected to the oil seal groove.

[0017] In the oil supply mechanism of the high-pressure airless oil injection device described above, the shape of the tail end of the blade is adapted to the shape of the blade mounting hole.

[0018] In the oil supply mechanism of the aforementioned high-pressure airless oil injection device, the tail end of the blade is square, and the blade mounting hole is also square.

[0019] In the oil supply mechanism of 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 end 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.

[0020] In the oil supply mechanism of the high-pressure airless oil injection device described above, a rubber ring mounting groove is provided at the top of the oil passage hole of the oil cup base, and the rubber ring is disposed in the rubber ring mounting groove; an oil valve retaining ring mounting groove is provided in the middle of the oil valve pin, and the oil valve retaining ring is installed in the oil valve retaining ring mounting groove; an oil pump connector mounting hole is provided at the bottom of the oil cup base, and the upper end of the oil pump connector is disposed in the oil pump connector mounting hole.

[0021] In the oil supply mechanism of the high-pressure airless oil injection device described above, 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; the oil valve retaining spring is tightly attached to the retaining spring.

[0022] In the oil supply mechanism of the aforementioned high-pressure airless oil injection device, during the oil supply state, 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, the top end of the oil valve pin is away from the top end of the oil passage hole, and the oil passage hole is open; during 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 of the high-pressure oil pump, the top end of the oil valve pin is blocked at the top end of the oil passage hole, and the oil passage hole is closed.

[0023] The oil supply mechanism of the high-pressure airless oil injection device of the present invention has the following beneficial effects:

[0024] (1) The glass inner liner facilitates observation of the liquid level.

[0025] (2) It has a stirring function. Silicone oil and diluent have different specific gravities and are prone to separation. Stirring helps to maintain the uniform mixing of the two and can prevent the silicone liquid from separating.

[0026] (3) The air filter can filter dust in the air and prevent bacteria from contaminating the silica liquid inside the glass liner;

[0027] (4) It has an oil valve pin that can control whether to supply oil, so as to achieve zero-residue docking with the high-pressure oil pump and prevent the silicified liquid from remaining in the oil pump for a long time.

[0028] (5) It has a liquid level detection function, and the oil level alarm realizes non-contact monitoring of the oil level in the glass inner tank;

[0029] (6) Filtered oil supply: The filter sealing ring has a 300-mesh filtration effect, which can filter out particles in the silicide liquid, making the silicide liquid supplied to the high-pressure oil pump of better quality.

[0030] (7) The top cover can be opened at any time to add siliconized liquid to the glass liner. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram (front view) of the oil supply mechanism of the high-pressure airless oil injection device of the present invention;

[0032] Figure 2 This is a three-dimensional structural diagram (from below) of the oil supply mechanism of the high-pressure airless oil injection device of the present invention;

[0033] Figure 3 This is a cross-sectional view of the oil supply mechanism of the high-pressure airless oil injection device of the present invention;

[0034] Figure 4 This is an exploded structural diagram of the oil supply mechanism of the high-pressure airless oil injection device of the present invention.

[0035] Figure 5 A three-dimensional structural diagram of the sleeve cover of the oil supply mechanism;

[0036] Figure 6 This is a front view of the sleeve cover of the oil supply mechanism;

[0037] Figure 7 A sectional view along line AA of the sleeve cover of the oil supply mechanism;

[0038] Figure 8 An exploded view of the electric propeller of the oil supply mechanism;

[0039] Figure 9 This is a schematic diagram (front view) showing the connection between the oil valve pin, oil cup base, and high-pressure oil pump.

[0040] Figure 10 This is a schematic diagram (viewed from below) showing the connection between the oil valve pin, oil cup base, and high-pressure oil pump.

[0041] Figure 11 This is a schematic diagram of the operation of the oil valve pin. Detailed Implementation

[0042] 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:

[0043] Please see Figures 1 to 11According to the preferred embodiment of the present invention, a fuel supply mechanism for a high-pressure airless fuel injection device includes a stainless steel bracket 17, a fuel 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 fuel level alarm 19 is snapped into the alarm housing 110 and tightly attached to the outer wall of the glass liner 18. The fuel 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 is provided on the top cover 15. The air filter 14 is threaded into the mounting hole and has a 0.2-micron pore size to filter dust and prevent bacterial contamination. A sleeve 13 is threaded into the upper opening of the top cover 15, and a sleeve cap 11 is threaded into the upper opening of the sleeve 13. A PTFE dustproof oil seal 12 is located at the bottom of the sleeve cap 11. Specifically, the bottom of the sleeve cap 11 has a groove a, and the PTFE dustproof oil seal 12 is located within groove a. An oil cup base 112 is threaded into the lower end of the stainless steel bracket 17. A filter sealing ring 111 is located 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 and can filter out particulate matter.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] Please see again Figure 11 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.

[0050] The electric propeller motor 114 and the oil level alarm 19 are connected to the control box. The side wall of 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.

[0051] The oil supply mechanism of the high-pressure airless oil injection device of the present invention is as follows: When the entire device is powered on, the PLC in the control box is powered on and runs. Process parameters, such as setting the oil level limit value, are set through the touch screen. The glass inner liner 18 contains silicide liquid. The control box controls the motor 114 to work, and the motor 114 drives the blade 117 to rotate to prevent the silicide liquid in the glass inner liner 18 from separating. The oil level alarm 19 monitors the silicide liquid level in the glass inner liner 18 in real time and feeds back the silicide liquid level signal to the control box. The oil level is indicated by the oil level indicator light. For example, when the oil level is higher than the set value, the oil level indicator light is green. When the oil level is lower than the set value, the oil level alarm 19 alarms and the oil level indicator light is red. After seeing the alarm signal, the operator can stop the motor 114 and directly open the top cover 15 to add silicide liquid to the glass inner liner 18.

[0052] In summary, the oil supply mechanism of the high-pressure airless oil injection device of the present invention adopts a glass inner liner for easy observation of the liquid level, has a stirring function to prevent the silanized liquid from separating, can achieve zero-residue connection with the high-pressure oil pump, and also has a filtering effect.

[0053] 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 oil supply mechanism for an oilless airless oil injection device, characterized by comprising: The utility model relates to a kind of oil cup, including stainless steel support, oil amount alarm and electric paddle, wherein: A glass liner with scale is concentrically arranged in the stainless steel support; An alarm housing is welded to the outside of the stainless steel support, and the oil amount alarm is clamped in the alarm housing and tightly attached to the outer wall of the glass liner; A top cover is threadedly connected to the upper end of the stainless steel support, and a sealing ring is arranged between the connection between the top cover and the stainless steel support; An air filter is arranged on the top cover; A sleeve is threadedly connected in the opening at the upper end of the top cover, a sleeve cover is threadedly connected in the opening at the upper end of the sleeve, and a Teflon dustproof oil seal is arranged at the bottom end of the sleeve cover; The electric paddle comprises 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, and a filter sealing ring is arranged between the opening at the lower end 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, the lower end of the oil valve thimble is inserted into the oil pump connector, 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, 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 clasp spring is mounted on the middle 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 clasp spring, a rubber pad is sleeved on the spring, and the rubber pad is located in the oil pump connector, An oil pump connector mounting hole is formed at the bottom end of the oil cup base, and the upper end of the oil pump connector is arranged in the oil pump connector mounting hole, 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 clasp stopper is arranged at the oil inlet nozzle of the high-pressure oil pump, the oil valve clasp spring is tightly attached to the clasp 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, the top end of the oil valve thimble is away from the top end of the oil passage through hole, and the oil passage through hole is open; 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, the top end of the oil valve thimble is blocked at the top end of the oil passage through hole, and the oil passage through hole is closed.

2. The oil supply mechanism of a high-pressure oil-less injection device according to claim 1, wherein A filter mounting hole is formed in the top cover, and the air filter is threadedly connected in the filter mounting hole.

3. The oil supply mechanism of a high-pressure oil-less injection device according to claim 1, wherein The electric paddle further comprises a motor housing, a paddle flange and a ball bearing, the motor is installed in the motor housing through screws, the paddle flange is connected to the output end of the motor through 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, a clasp 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.

4. The oil supply mechanism of a high-pressure oil-less injection device according to claim 3, wherein The bottom end of the sleeve cover is provided with an oil seal clamping groove, and the four-fluorine dustproof oil seal is arranged in the oil seal clamping groove; the upper end of the sleeve cover is provided with a bearing clamping groove, and the ball bearing is arranged in the bearing clamping groove; the bearing clamping groove is communicated with the oil seal clamping groove.

5. The oil supply mechanism of a high-pressure oil-less injection device according to claim 3, wherein The tail end of the paddle is shaped to match the shape of the paddle mounting hole.

6. A high-pressure oil supply mechanism for a high-pressure airless oil spraying device according to claim 5, wherein The tail end of the paddle is square, and the paddle mounting hole is also square.

7. The oil supply mechanism of a high-pressure oil-less injection device according to claim 1, wherein The top end of the oil passage through hole of the oil cup base is provided with a rubber ring mounting groove, and the rubber ring is arranged in the rubber ring mounting groove; the middle part of the oil valve thimble is provided with an oil valve clamping spring mounting groove, and the oil valve clamping spring is arranged in the oil valve clamping spring mounting groove.

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