A hand siphon pump for sampling the bottom of an oil tank

Abstract

The utility model discloses a hand pressure type siphon pump for oil tank bottom sampling relates to oil product detection tool technical field for solving the problem of traditional sampling pump needing two -hand operation, inconvenient portable. The siphon pump includes pump body, piston and drive piston's grip pressure device. The grip pressure device includes the handle through the hinge with the pump cover of bolt and the spring that connects between handle and pump cover, and handle is connected with the piston handle of the top of piston through pull rod and connecting rod. Through one -hand grip pressure handle, drive piston reciprocating motion, combine in the upper valve and lower valve of pump body, realize the one -way suction and discharge of oil material. The utility model discloses compact structure has realized single -hand operation of single person.

Description

Technical Field

[0001] This utility model relates to the technical field of oil quality testing tools, specifically to a hand-operated siphon pump for extracting oil samples from the bottom of an oil tank for quality inspection. Background Technology

[0002] Regularly sampling fuel from the bottom of the tank to check for contamination by water or impurities is crucial for ensuring the proper functioning of engines and other equipment. Current siphon pumps, such as hand-cranked ones, typically require the user to operate both hands (one hand to hold the pump body, the other to crank the lever), which is particularly inconvenient in situations with limited space or where the user needs to perform other tasks simultaneously. Therefore, there is an urgent need for a portable sampling tool that allows for quick, one-handed operation. Utility Model Content

[0003] Technical problems to be solved The purpose of this invention is to overcome the shortcomings of the prior art and provide a hand-operated siphon pump that is compact, easy to operate, and portable. This siphon pump can be operated by a single person with one hand and can efficiently complete the oil sampling work at the bottom of the oil tank.

[0004] Technical solution To achieve the above objectives, the present invention adopts the following technical solution: A hand-operated siphon pump for bottom sampling of fuel tanks includes a pump body, a piston, and a gripping device for driving the piston to reciprocate. The gripping device includes a handle, a spring, a pump cover, and a pin. The pump cover is fixed to the upper end of the pump body, and the handle is hinged to the pump cover via the pin to form a lever structure. The spring connects the handle and the pump cover to provide a restoring force. The handle is driven by a pull rod and a connecting rod to a piston lug fixed to the upper end of the piston. Preferably, an upper valve, a limiting sleeve, and a lower valve are sequentially arranged below the piston inside the pump body. Both the upper and lower valves are one-way valves that only allow the fuel to flow upwards. Preferably, an oil nozzle for connecting an oil delivery pipe is provided at the bottom of the pump body, and a sealing rubber ring is provided at the connection between the oil nozzle and the pump body. Preferably, an O-ring is provided between the piston and the inner wall of the pump body for sealing. Preferably, the pressing part of the handle has a curved surface suitable for thumb pressing, and the pump cover has a contour suitable for the other four fingers to grip. Preferably, the siphon pump has an overall weight of about 2 kg and can be detachably stored in a portable case.

[0005] Beneficial effects Compared with the prior art, the beneficial effects of this utility model include: 1. The innovative grip-type drive mechanism enables true one-handed operation, allowing users to hold the pump and complete all sampling actions with one hand, significantly improving operational convenience and work efficiency in complex working conditions. 2. The overall structure is compact, with a reasonable component layout, lightweight, and compatible with a portable case for easy carrying and storage. 3. Utilizing a combination of lever principle and spring return, operation is effortless, requiring no external power source, and has wide applicability. 4. Testing shows that with a 1-meter drop, its siphon flow rate is no less than 10 liters / minute; with a 1.5-meter drop, its grip-type flow rate is no less than 12.5 liters / minute, demonstrating reliable performance and meeting rapid sampling requirements. Detailed Implementation

[0006] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. (See attached drawings.) Figure 3 The core of this hand-operated siphon pump lies in a gripping drive mechanism consisting of a handle 1, a spring 2, a pump cover 3, and a pin 4. The pump cover 3 is fixed to the top of the pump body 9 by threads or other means. The middle part of the handle 1 is hinged to the pump cover 3 via the pin 4, forming a lever that saves effort. One end of the spring 2 rests on the handle 1, and the other end rests on the pump cover 3, providing the handle 1 with an automatic reset force. The upper end of the pull rod 6 is connected to the lever arm end of the handle 1, and the lower end is connected to the piston lug 8 via a connecting rod 5. The piston 10 is suspended below the drive mechanism via the piston lug 8, and the sealing O-ring 7 on it ensures a tight seal with the inner wall of the pump body 9. Inside the pump body 9, an upper valve 11, a limiting sleeve 12, and a lower valve 13 are installed sequentially below the piston 10. Both the upper valve 11 and the lower valve 13 are one-way ball valves or flap valves, ensuring that fluid can only pass through unidirectionally from bottom to top. An oil nozzle 15 is installed at the bottom of the pump body 9 for connecting the oil delivery hose; the interface is sealed with a rubber ring 14. During operation, if... Figure 4 As shown, the user holds the pump body with one hand, pressing the handle 1 with the thumb and gripping the pump cover 3 with four fingers. When the handle 1 is pressed down, the piston 10 moves upward, the lower valve 13 opens, and the upper valve 11 closes, drawing oil into the pump chamber. When the handle 1 is released, the spring 2 returns the handle 1 to its original position, the piston 10 moves downward, the lower valve 13 closes, and the upper valve 11 opens, expelling oil from the nozzle 15. This cycle repeats, achieving continuous oil pumping. The overall weight of this siphon pump is approximately 2 kg (including the hose), and its dimensions are compact. Figure 3 As shown, after use, it can be neatly placed in a dedicated aluminum alloy carrying case, which greatly facilitates its retrieval and storage in the field or in mobile working conditions. Attached Figure Description

[0007] Figure 1 This is a perspective view of the overall shape of this utility model. Figure 2 This is a cross-sectional view of the internal structure of this utility model. Figure 3 This is a dimensional drawing of the present invention. Figure 4This is a schematic diagram illustrating the working principle of this utility model (where A represents the suction stroke and B represents the discharge stroke). The component numbers in the diagram are as follows: 1. Handle; 2. Spring; 3. Pump cover; 4. Pin; 5. Connecting rod; 6. Tie rod; 7. Sealing O-ring; 8. Piston lug; 9. Pump body; 10. Piston; 11. Upper valve; 12. Limit sleeve; 13. Lower valve; 14. Rubber ring; 15. Oil nozzle.

[0008] Implementation The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings and embodiments. (See attached drawings.) Figure 2 This utility model provides a hand-operated siphon pump for bottom sampling of oil tanks, the core improvement of which lies in the gripping device. The pump cover 3 is fixed to the upper opening of the pump body 9 via a threaded connection. The middle part of the handle 1 is hinged to the pump cover 3 via a pin 4, thus forming a force-saving lever. One end of the spring 2 acts on the inner side of the handle 1, and the other end acts on the upper surface of the pump cover 3, providing the handle 1 with an automatic reset force. The upper end of the pull rod 6 is connected to the lever arm end of the handle 1 away from the hinge point, and the lower end is hinged to the piston lug 8 via a connecting rod 5. The piston 10 is suspended below the drive mechanism via the piston lug 8, and its outer circumferential groove is embedded with a sealing O-ring 7 to ensure dynamic sealing when the piston 10 reciprocates within the pump body 9. Inside the pump body 9, an upper valve 11, a limiting sleeve 12, and a lower valve 13 are sequentially installed below the piston 10. Both the upper valve 11 and the lower valve 13 are one-way valves, such as ball valves or disc valves, whose opening direction is limited to allowing fluid to flow only from bottom to top. The limiting sleeve 12 is fixed to the inner wall of the pump body 9 to limit the downward endpoint of the piston 10 and prevent impact on the valve body. An oil nozzle 15 is installed at the center of the bottom of the pump body 9 for connecting to the oil delivery hose; a rubber ring 14 achieves a static seal at the interface between the oil nozzle 15 and the pump body 9. The working principle of this utility model is as follows: Figure 4 As shown: Inhalation course ( Figure 4 The operator holds the pump with one hand, placing their thumb on the pressing part of the handle 1 and gripping the pump cover 3 with the other four fingers. By squeezing the handle 1 inward, it rotates around the pin 4, overcoming the spring force of the spring 2 and pulling the piston 10 upward via the pull rod 6 and connecting rod 5. The rising piston 10 increases the volume inside the pump chamber, creating a negative pressure. At this time, the lower valve 13 opens under the pressure difference, the upper valve 11 closes, and the oil at the bottom of the tank is drawn into the pump chamber. Discharge stroke ( Figure 4Release handle 1. Under the reset action of spring 2, handle 1 rotates in the opposite direction, pushing piston 10 downward. The pressure inside the pump chamber increases, causing lower valve 13 to close and upper valve 11 to open. The sucked-in oil is forced out of the pump chamber, discharged through upper valve 11 and from nozzle 15. By repeating the above squeezing and releasing action, oil can be continuously extracted from the bottom of the oil tank. The overall weight of this siphon pump is approximately 2 kg (including the hose), and its size is compact (e.g., ...). Figure 3 As shown in the image, after use, it can be neatly placed in a dedicated aluminum alloy carrying case, greatly facilitating retrieval and storage in the field or mobile working conditions.

[0009] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A hand-operated siphon pump for sampling from the bottom of an oil tank, comprising a pump body (9) and a piston (10) disposed inside the pump body (9), characterized in that: It also includes a gripping device for driving the piston (10); the gripping device includes a handle (1), a spring (2), a pump cover (3) and a pin (4); the pump cover (3) is fixed to the upper part of the pump body (9), the handle (1) is hinged to the pump cover (3) through the pin (4), and the spring (2) is connected between the handle (1) and the pump cover (3); the handle (1) is also connected to the piston lug (8) fixed to the upper end of the piston (10) through a pull rod (6) and a connecting rod (5).

2. A hand-operated siphon pump for bottom sampling of an oil tank according to claim 1, characterized in that: Inside the pump body (9), below the piston (10), there are an upper valve (11), a limiting sleeve (12), and a lower valve (13) arranged in sequence; the upper valve (11) and the lower valve (13) are both one-way valves.

3. A hand-operated siphon pump for bottom sampling of an oil tank according to claim 2, characterized in that: The bottom of the pump body (9) is provided with an oil nozzle (15), and a rubber ring (14) is provided at the connection between the oil nozzle (15) and the pump body (9).

4. A hand-operated siphon pump for bottom sampling of an oil tank according to claim 1, characterized in that: A sealing O-ring (7) is provided between the piston (10) and the inner wall of the pump body (9).

5. A hand-operated siphon pump for bottom sampling of an oil tank according to claim 1, characterized in that: The gripping part of the handle (1) is designed as a curved surface suitable for thumb pressing, and the pump cover (3) is designed with a grip structure suitable for the other four fingers to grasp.

6. A hand-operated siphon pump for bottom sampling of an oil tank according to claim 1, characterized in that: The entire siphon pump can be detachably stored in an aluminum alloy carrying case.

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