Oil suction device for oil drum of oiling trolley

Abstract

The oil suction device comprises an oil suction header pipe, a main oil suction pipe, an elastic oil pipe, an auxiliary oil suction pipe and a liquid level sensor, the oil suction header pipe is connected with an oil pump of the refueling trolley, the upper end of the main oil suction pipe is connected with the oil suction header pipe through an electric ball valve, and the lower end of the main oil suction pipe is inserted into the inner bottom of the oil barrel through an oil injection hole of the oil barrel. The upper end of the auxiliary oil suction pipe is connected with the oil suction header pipe, the lower end of the auxiliary oil suction pipe is inserted into the oil barrel through a vent hole of the oil barrel, one end of the elastic oil pipe is connected with the lower end of the auxiliary oil suction pipe, the other end of the elastic oil pipe is blocked, and a plurality of oil suction holes are distributed in the pipe wall of the elastic oil pipe. And a signal output end of the liquid level sensor is connected with a controller of the electric ball valve. According to the oiling trolley, oil is sucked from the oil barrel through the two oil pipes, when the liquid level descends to the oil inlet of the main oil suction pipe, the elastic oil pipe attached to the bottom of the barrel is used for pumping all residual oil, waste of the oil can be avoided, and the service life of the oiling trolley is prolonged.

Description

Technical Field

[0001] This utility model relates to an oil suction device for an oil tank in a refueling cart, which can extend the service life of the refueling cart and reduce oil waste, and belongs to the field of metallurgical equipment technology. Background Technology

[0002] In the steel and metallurgical industry, hydraulic lubrication systems are widely used, resulting in a huge consumption of hydraulic oil and lubricating oil. Besides large storage tanks, closed-top iron drums are also a primary storage container for hydraulic oil and lubricating oil due to their durability, good sealing, high safety, and recyclability. Among these, small-opening iron drums with a capacity of 200L are even more widely used.

[0003] Mobile filtration carts are typically used for both filtering and refueling oil. These carts usually employ a stainless steel pipe, slightly smaller in diameter than the inlet of a small-opening iron drum, inserted into the drum as a suction pipe. This suction pipe is connected to the cart's pump using a flexible steel wire hose. During operation, the suction pipe is inserted into the drum through the inlet until it touches the bottom, with the pipe tip submerged below the liquid level. The pump is then turned on to begin refueling. When the liquid level in the drum drops to the bottom, cavitation occurs, causing noise and abnormal vibration from the pump, which can shorten the cart's lifespan.

[0004] Because hydraulic oil and lubricating oil have relatively poor fluidity, a certain amount of residual oil remains on the inner wall and bottom of the oil drum after refueling. Measurements show that an average of 1300ml of residual oil remains in each drum, accounting for 0.65% of its volume. This accumulates to a significant waste of oil. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an oil suction device for the oil tank of a refueling cart, thereby extending the service life of the refueling cart, reducing the amount of residual oil at the bottom of the oil tank, and avoiding serious waste of oil.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An oil suction device for an oil tank in a refueling cart includes a main suction pipe, a main suction pipe, a flexible oil pipe, an auxiliary suction pipe, and a level sensor. The outlet end of the main suction pipe is connected to the oil pump of the refueling cart. The upper end of the main suction pipe is connected to the inlet end of the main suction pipe via an electric ball valve, and the lower end is inserted into the bottom of the oil tank through an oil filling hole on the top plate of the oil tank. The upper end of the auxiliary suction pipe is connected to the inlet end of the main suction pipe, and the lower end is inserted into the oil tank through a vent hole on the top plate of the oil tank. One end of the flexible oil pipe is connected to the lower end of the auxiliary suction pipe, and the other end is sealed. Multiple suction holes are distributed on the wall of the flexible oil pipe. The level sensor is fixed to the lower end of the main suction pipe, and the signal output end of the level sensor is connected to the controller of the electric ball valve.

[0008] The oil suction device for the oil drum of the aforementioned refueling cart also includes an internal purging device. The internal purging device includes a high-pressure air pipe and a sleeve. The sleeve is slidably fitted onto the outer wall of the main oil suction pipe. An air inlet is provided on the upper end face of the sleeve wall. The air inlet is connected to a high-pressure air source through the high-pressure air pipe. Multiple air jet holes are provided on the lower end outer wall of the sleeve, evenly distributed around the axis of the main oil suction pipe. Each air jet hole is connected to the air inlet on the upper end face of the sleeve wall. The outer surface of the middle part of the sleeve is a conical surface. The conical surface is tightly fitted around the oil injection hole on the top plate of the oil drum.

[0009] The oil suction device for the oil drum of the aforementioned refueling cart also includes a dust cover. The dust cover is a cylindrical cover that is set above the oil drum and has an inner diameter larger than the outer diameter of the oil drum. The top plate of the dust cover is provided with a lifting handle, an auxiliary oil suction pipe through hole corresponding to the vent hole on the top plate of the closed oil drum, and a main oil suction pipe through hole corresponding to the oil filling hole on the top plate of the closed oil drum. The auxiliary oil suction pipe slides through the auxiliary oil suction pipe through hole. The sleeve is located in the main oil suction pipe through hole and is connected to the dust cover through two retaining rings. The two retaining rings are snapped onto the outer wall of the upper end of the sleeve and respectively abut against the upper and lower surfaces of the top plate of the dust cover.

[0010] The oil suction device of the oil tank in the above-mentioned refueling cart has a beveled end at the lower end of the main oil suction pipe.

[0011] The oil suction device of the oil tank in the above-mentioned refueling cart has a silicone tube for the elastic oil pipe, which is supported by a stainless steel spring inside.

[0012] The oil suction device of the oil tank in the above-mentioned refueling cart uses a float level sensor.

[0013] The oil suction device for the oil tank of the above-mentioned refueling cart, wherein both the main oil suction pipe and the auxiliary oil suction pipe are made of stainless steel.

[0014] The oil suction device of the oil tank of the above-mentioned refueling cart has sealing rubber installed at the auxiliary oil suction pipe through hole and the main oil suction pipe through hole of the dust cover.

[0015] This invention uses dual oil pipes to draw oil from the oil drum. When the liquid level drops to the inlet of the main oil suction pipe, the remaining oil is drawn out by the elastic oil pipe that is in contact with the bottom of the drum. This not only avoids serious waste of oil, but also prevents air suction, thereby extending the service life of the refueling cart. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the auxiliary oil suction pipe;

[0019] Figure 3 This is a structural diagram of the dust cover;

[0020] Figure 4 This is a schematic diagram showing the connection between the internal purging device, the dust cover, and the oil drum.

[0021] The following are the labels in the diagram: 1. Main suction pipe, 2. Electric ball valve, 3. In-tank purging device, 4. Dust cover, 5. Main suction pipe, 6. Liquid level sensor, 7. Flexible oil pipe, 8. Auxiliary suction pipe, 10. High-pressure air pipe, 11. Sleeve, 12. Air jet, 13. Auxiliary suction pipe through hole, 14. Lifting handle, 15. Main suction pipe through hole, 16. Snap ring, 17. Top plate of oil tank. Detailed Implementation

[0022] To address the problems in existing technologies where refueling carts cannot completely remove oil from the bottom of the oil drum and where cavitation occurs at the end of the pumping operation, this invention provides an oil suction device that works in conjunction with the refueling cart. This device can reduce oil waste and extend the service life of the refueling cart.

[0023] See Figures 1-4 This utility model mainly includes an oil suction main pipe 1, an electric ball valve 2, a barrel blowing device 3, a dust cover 4, a main oil suction pipe 5, a liquid level sensor 6, an elastic oil pipe 7, and an auxiliary oil suction pipe 8.

[0024] See Figure 1 and Figure 3The dust cover 4 is a cylindrical cover made of galvanized sheet with an inner diameter slightly larger than the outer diameter of the oil drum. It is located above the closed oil drum of the refueling cart. The top plate is equipped with a lifting handle 14, an auxiliary oil suction pipe through hole 13 corresponding to the vent hole on the top plate of the closed oil drum, and a main oil suction pipe through hole 15 corresponding to the oil filling hole on the top plate of the closed oil drum. The oil outlet end of the main oil suction pipe 1 is connected to the oil pump of the refueling cart. The main oil suction pipe 5 and the auxiliary oil suction pipe 8 are both rigid oil pipes. The upper end of the main oil suction pipe 5 is connected to the oil inlet end of the main oil suction pipe 1 through an electric ball valve 2. The lower end is inserted into the bottom of the oil drum through the main oil suction pipe through hole 15 of the dust cover 4 and the oil filling hole on the top plate of the closed oil drum. The main oil suction pipe 5 is made of stainless steel and its lower end is a beveled end to prevent the bottom plate of the oil drum from blocking the oil inlet channel and to facilitate the flow of oil.

[0025] The auxiliary suction pipe 8 is a thin stainless steel tube with a diameter smaller than the main suction pipe 5. The upper end of the auxiliary suction pipe 8 connects to the inlet end of the main suction pipe 1, and the lower end passes through the auxiliary suction pipe through-hole 13 of the dust cover 4 and the vent hole on the top plate of the closed oil tank before being inserted into the oil tank of the refueling cart. One end of the flexible oil pipe 7 connects to the lower end of the auxiliary suction pipe 8, while the other end is sealed. Multiple suction holes 9 are distributed on the wall of the flexible oil pipe 7. The flexible oil pipe 7 is made of oil-resistant and corrosion-resistant silicone tubing and has an internal stainless steel spring support. The total length of the auxiliary suction pipe 8 and the flexible oil pipe 7 is greater than the length of the main suction pipe 5. When the lower end of the main suction pipe 5 touches the bottom of the tank, the flexible oil pipe 7 bends and effectively adheres to the bottom, sucking up the oil from the bottom of the tank. Because the flexible oil pipe 7 has an internal stainless steel spring, it will not experience poor oil suction due to excessive bending or deformation during suction. The flexible oil tube 7 has a small diameter, and the oil suction hole 9 on its tube wall will remain below the liquid level, so the flexible oil tube 7 is not prone to cavitation.

[0026] Sealing rubber (not shown in the figure) is installed at the auxiliary oil suction pipe through hole 13 and the main oil suction pipe through hole 15 of the dust cover 4 to cover them. This is used to scrape off the residual oil attached to the outer wall of the main oil suction pipe 5, auxiliary oil suction pipe 8 and elastic oil pipe 7 after the oil pumping operation is completed, and at the same time to prevent dust from falling on the oil drum when the refueling trolley is not in use.

[0027] The level sensor 6 is a float level sensor, fixed to the inner wall of the lower end of the main suction pipe 5 by a bracket. The signal output terminal of the level sensor 6 is connected to the controller of the electric ball valve 2. When the level sensor 6 sends a low level signal, the electric ball valve 2 will automatically close, cutting off the connection between the main suction pipe 5 and the main suction pipe 1, preventing cavitation in the main suction pipe 5. Since the elastic oil pipe 7 is also less prone to cavitation, it can extend the service life of the refueling cart.

[0028] See Figure 4The internal purging device 3 includes a high-pressure air pipe 10, a sleeve 11, and two retaining rings 16. The sleeve 11 is slidably fitted onto the outer wall of the main oil suction pipe 5. An air inlet is provided on the upper end face of the sleeve 11 wall, which is connected to a high-pressure air source through the high-pressure air pipe 10. Multiple jet holes 12 are evenly distributed around the axis of the main oil suction pipe 5 on the lower end outer wall of the sleeve 11, and each jet hole 12 communicates with the air inlet on the upper end face of the sleeve 11 wall. The sleeve 11 is made of stainless steel. The two retaining rings 16 are fastened to the upper end outer wall of the sleeve 11 and respectively abut against the upper and lower surfaces of the top plate of the dust cover 4, fixing the sleeve 11 and the dust cover 4 together. During operation, the lower end of the sleeve 11 is accurately inserted into the oil filling hole on the top plate of the closed oil drum using the guiding action of the main suction pipe 5. The outer surface of the middle part of the sleeve 11 is conical, and the sleeve 11 and the dust cover 4 seal tightly against the oil filling hole on the top plate of the oil drum due to their own weight. During refueling, compressed air is injected through the high-pressure air pipe 10 to purge the inner wall of the oil drum, accelerating the falling speed of oil adhering to the drum wall, reducing the amount of oil remaining on the drum wall, and avoiding serious waste of oil.

[0029] The working process of this utility model is as follows: Before refueling, after cleaning the top of the oil drum, open the oil filling hole cover and the vent hole cover. Holding the lifting handle 14 and the main suction pipe 1, vertically insert the main suction pipe 5 and the auxiliary suction pipe 8 into the oil filling hole and the vent hole of the oil drum. When the lower end of the sleeve 11 is inserted into the oil filling hole of the oil drum, the sleeve 11 is stuck between the oil drum and the dust cover 4. The sleeve 11 and the dust cover 4 rely on their own weight to press against the oil filling hole of the oil drum to form a conical seal. The elastic oil pipe 7 bends and fits tightly against the bottom of the oil drum after contacting the bottom of the drum. The oil pumping operation begins. Compressed air starts after a delay and is sprayed out from the jet hole 12 at the lower end of the sleeve 11 to blow away the oil hanging on the drum wall and accelerate the falling speed of the oil hanging on the drum wall. During the refueling process, the liquid level in the oil drum continues to drop. When the liquid level sensor 6 sends a low liquid level signal, the electric ball valve 2 closes, cutting off the electric ball valve, and the auxiliary suction pipe 8 works alone until the remaining oil is pumped out.

[0030] This utility model has a simple structure and low cost, but has good performance. It solves the problems of oil waste caused by incomplete oil extraction by refueling carts and easy aging of equipment due to air suction in the prior art. It can also reduce environmental pollution caused by improper oil storage. It is suitable for promotion and application in the iron and steel metallurgy industry and other industries that require frequent addition of hydraulic oil and lubricating oil.

Claims

1. A fuel suction device for a fuel tank of a fuel truck, characterized in that, The system includes a main suction pipe (1), a main suction pipe (5), an elastic oil pipe (7), an auxiliary suction pipe (8), and a liquid level sensor (6). The oil outlet of the main suction pipe (1) is connected to the oil pump of the refueling cart. The upper end of the main suction pipe (5) is connected to the oil inlet of the main suction pipe (1) through an electric ball valve (2), and the lower end is inserted into the bottom of the oil tank through the oil filling hole on the top plate of the oil tank. The upper end of the auxiliary suction pipe (8) is connected to the oil inlet of the main suction pipe (1), and the lower end is inserted into the oil tank through the vent hole on the top plate of the oil tank. One end of the elastic oil pipe (7) is connected to the lower end of the auxiliary suction pipe (8), and the other end is sealed. Multiple suction holes (9) are distributed on the pipe wall of the elastic oil pipe (7). The liquid level sensor (6) is fixed at the lower end of the main suction pipe (5), and the signal output end of the liquid level sensor (6) is connected to the controller of the electric ball valve (2).

2. The oil sucking device of the oil drum of the oiling trolley according to claim 1, characterized in that, It also includes an in-tank purging device (3), which includes a high-pressure air pipe (10) and a sleeve (11). The sleeve (11) is slidably fitted on the outer wall of the main oil suction pipe (5). An air inlet is provided on the upper end face of the sleeve (11) wall. The air inlet is connected to a high-pressure air source through the high-pressure air pipe (10). Multiple jet holes (12) are evenly distributed around the axis of the main oil suction pipe (5) on the lower end of the outer wall of the sleeve (11). Each jet hole (12) is connected to the air inlet on the upper end face of the sleeve (11) wall. The outer surface of the middle part of the sleeve (11) is a conical surface. The conical surface is tightly fitted around the oil injection hole on the top plate of the oil drum.

3. The oil suction device for an oil tank in a refueling cart according to claim 2, characterized in that, It also includes a dust cover (4), which is a cylindrical cover set above the oil drum with an inner diameter larger than the outer diameter of the oil drum. The top plate of the dust cover (4) is provided with a lifting handle (14), an auxiliary oil suction pipe through hole (13) corresponding to the vent hole on the top plate of the closed oil drum, and a main oil suction pipe through hole (15) corresponding to the oil injection hole on the top plate of the closed oil drum. The auxiliary oil suction pipe (8) slides through the auxiliary oil suction pipe through hole (13). The sleeve (11) is located in the main oil suction pipe through hole (15) and is connected to the dust cover (4) through two retaining rings (16). The two retaining rings (16) are clamped on the outer wall of the upper end of the sleeve (11) and respectively abut against the upper and lower surfaces of the top plate of the dust cover (4).

4. The oil suction device for the oil drum of a refueling cart according to claim 3, characterized in that, The lower end of the main oil suction pipe (5) is a beveled end.

5. The oil suction device for the oil drum of a refueling cart according to claim 4, characterized in that, The elastic oil pipe (7) is a silicone tube with a stainless steel spring support inside.

6. The oil suction device for the oil drum of a refueling cart according to claim 5, characterized in that, The liquid level sensor (6) is a float liquid level sensor.

7. The oil suction device for an oil tank in a refueling cart according to claim 6, characterized in that, Both the main oil suction pipe (5) and the auxiliary oil suction pipe (8) are made of stainless steel.

8. The oil suction device for the oil drum of a refueling cart according to claim 7, characterized in that, Sealing rubber is installed at the auxiliary oil suction pipe through hole (13) and the main oil suction pipe through hole (15) of the dust cover (4).

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