A sampling device for lubricating oil

Abstract

The utility model relates to lubricating oil detection technical field, and disclose a kind of sampling device for lubricating oil detection, including sampling cylinder and connector, the end of sampling cylinder is fixedly connected in the connector, the inner wall of connector is threadedly connected with threaded connector, the one end of threaded connector away from connector is fixedly connected with connecting hose, the one end of connecting hose away from threaded connector is fixedly connected with sampling needle tube, the inner wall of sampling cylinder is slidably equipped with piston, the end of piston is fixedly connected with push-pull rod.The utility model provides the one end of threaded connector away from connector fixedly connected with hose, hose is set as folding pipe, with good flexibility and elasticity, can be adapted to different sampling scene, avoid the operation difficulty caused by sampling position limited;The orifice of sampling needle tube fixed in the other end of hose is provided with bevel, and the bevel design is convenient for puncturing lubricating oil container seal or inserting into oil interior, reduces sampling resistance.

Description

Technical Field

[0001] This utility model relates to the field of lubricating oil testing technology, and in particular to a sampling device for lubricating oil testing. Background Technology

[0002] Lubricating oil testing is a complex industrial process from crude oil pretreatment to finished product blending. Its core objective is to produce products with specific properties such as viscosity, anti-wear, and anti-oxidation through physical separation, chemical refining, and formulation blending to meet the lubrication needs of different scenarios such as engines, industrial equipment, and precision machinery. The process needs to be flexibly adjusted according to the quality of crude oil and product specifications. Overall, it can be divided into two core stages: base oil production and finished lubricating oil blending.

[0003] In the existing technology, in order to ensure the processing quality of lubricating oil, it is necessary to regularly sample and test the lubricating oil. However, during the sampling process, the lubricating oil is placed inside the tank, which makes it inconvenient to flexibly adjust the lubricating oil sample in different positions according to the usage requirements, thus affecting the sampling effect. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the existing technology that, in order to ensure the processing quality of lubricating oil, it is necessary to periodically sample the lubricating oil during the testing process. However, during the sampling process, the lubricating oil is placed inside the tank, which makes it inconvenient to flexibly adjust the lubricating oil sample in different positions according to the usage requirements, thus affecting the sampling effect. Therefore, this invention proposes a sampling device for lubricating oil testing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A sampling device for lubricating oil testing includes a sampling cylinder and a connector. The connector is fixedly connected to the end of the sampling cylinder. A threaded connector is threadedly connected to the inner wall of the connector. A connecting hose is fixedly connected to the end of the threaded connector opposite to the connector. A sampling needle is fixedly connected to the end of the connecting hose opposite to the threaded connector. A piston is slidably provided on the inner wall of the sampling cylinder. A push-pull rod is fixedly connected to the end of the piston. The end of the push-pull rod opposite to the piston extends to the outside of the sampling cylinder and is fixedly connected to a handle.

[0006] Preferably, the sampling tube has an opening on its wall, a glass strip is fixedly connected to the inner wall of the opening, and scale lines are provided on the inner wall of the opening.

[0007] Preferably, the connecting tubing is configured as a folded tube, and the sampling needle tube has an oblique opening at its opening.

[0008] Preferably, a sealing ring is fixedly connected to the end of the sampling cylinder, and the inner wall of the sealing ring is fitted onto the wall of the push-pull rod.

[0009] Preferably, the inner wall of the sampling cylinder has a cavity, and an elastic metal strip is fixedly connected to the inner wall of the cavity. A limit block is fixedly connected to the top end of the elastic metal strip. A limit slot is opened on the wall of the push-pull rod, and the limit block is inserted into the inner wall of the limit slot.

[0010] Preferably, a pull rod is fixedly connected to the bottom of the limiting block, and the bottom end of the pull rod extends through the cavity to the outside of the sampling cylinder and is fixedly connected to a pull ring.

[0011] Compared with the prior art, the present invention provides a sampling device for lubricating oil testing, which has the following beneficial effects: 1. The sampling device for lubricating oil testing is fixedly connected to a hose at one end of the threaded connector away from the joint. The hose is designed as a folded tube, which has good flexibility and extensibility and can be adapted to different sampling scenarios, avoiding operational difficulties caused by limited sampling positions. The sampling needle tube fixed at the other end of the hose has an oblique opening. The oblique opening design makes it easy to puncture the seal of the lubricating oil container or insert into the oil, reducing sampling resistance.

[0012] 2. This sampling device for lubricating oil testing works by having the operator pull the handle on the outside of the push rod, causing the piston to slide outward along the inner wall of the sampling cylinder, creating a negative pressure inside the sampling cylinder. At this time, the sampling needle is inserted into the lubricating oil, and the handle is slowly released. Under the action of negative pressure, the lubricating oil enters the sampling cylinder through the sampling needle, hose, and connector, completing the sampling.

[0013] 3. This sampling device for lubricating oil testing uses the elasticity of a spring-loaded metal strip to push a limiting block into a limiting slot on the push-pull rod wall, fixing the push-pull rod to the piston and preventing lubricating oil leakage or air entry into the sampling cylinder due to piston movement caused by external force. When it is necessary to discharge the sample, pull the pull ring on the outside of the sampling cylinder, which drives the limiting block to compress the spring-loaded metal strip through the pull rod, causing the limiting block to disengage from the limiting slot. After unlocking, push the handle to drive the piston to slide inward, thus pushing out the lubricating oil sample in the sampling cylinder and completing the sample transfer. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a sampling device for testing lubricating oil proposed in this utility model; Figure 2 for Figure 1 Enlarged structural diagram of part A in the middle section; Figure 3 for Figure 1 A magnified schematic diagram of the structure of part B in the middle section.

[0015] In the diagram: 1. Sampling cylinder, 2. Connector, 3. Glass strip, 4. Scale line, 5. Threaded connector, 6. Connecting hose, 7. Sampling needle, 8. Piston, 9. Push-pull rod, 10. Handle, 11. Sealing ring, 12. Elastic metal strip, 13. Limiting block, 14. Pull rod, 15. Pull ring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figure 1-3 A sampling device for testing lubricating oil includes a sampling cylinder 1 and a connector 2. The connector 2 is fixedly connected to the end of the sampling cylinder 1. A threaded connector 5 is threadedly connected to the inner wall of the connector 2. A connecting hose 6 is fixedly connected to the end of the threaded connector 5 away from the connector 2. A sampling needle tube 7 is fixedly connected to the end of the connecting hose 6 away from the threaded connector 5. A piston 8 is slidably provided on the inner wall of the sampling cylinder 1. A push-pull rod 9 is fixedly connected to the end of the piston 8. The end of the push-pull rod 9 away from the piston 8 extends to the outside of the sampling cylinder 1 and is fixedly connected to a handle 10.

[0018] An opening is provided on the wall of the sampling cylinder 1. A glass strip 3 is fixedly connected to the inner wall of the sampling cylinder 1 at the opening. A scale line 4 is provided on the inner wall of the sampling cylinder 1 at the opening. The connecting hose 6 is a folded tube. An oblique opening is provided at the tube opening of the sampling needle tube 7. A sealing ring 11 is fixedly connected to the end of the sampling cylinder 1. The inner wall of the sealing ring 11 is fitted against the wall of the push-pull rod 9.

[0019] The sampling cylinder 1 is the core component for storing lubricating oil samples. The connector 2 fixed at the end is used to connect the sampling pipeline. The threaded connector 5 connected to the inner wall of the connector 2 allows for quick disassembly and assembly, facilitating the replacement of sampling components of different specifications. The end of the threaded connector 5 opposite to the connector 2 is fixedly connected to the hose 6. The hose 6 is designed as a folded tube, which has good flexibility and extensibility, and can be adapted to different sampling scenarios, avoiding operational difficulties caused by limited sampling positions. The sampling needle tube 7 fixed at the other end of the hose 6 has an angled opening. The angled opening design makes it easy to puncture the seal of the lubricating oil container or insert into the oil, reducing sampling resistance, while ensuring that the sampling needle tube 7 can smoothly draw in the oil, avoiding the impact of tube blockage on sampling efficiency.

[0020] When sampling is required, the operator pulls the handle 10 on the outside of the push-pull rod 9, causing the piston 8 to slide outward along the inner wall of the sampling cylinder 1, creating a negative pressure inside the sampling cylinder 1; at this time, the sampling needle tube 7 is inserted into the lubricating oil, and the handle 10 is slowly released. Under the action of negative pressure, the lubricating oil enters the sampling cylinder 1 through the sampling needle tube 7, the hose 6, and the connector 2, completing the sampling.

[0021] The glass strip 3 fixed at the opening of the sampling tube 1 and the scale line 4 on the inner wall make it easy for operators to observe the sampling amount. The sampling volume can be accurately controlled through the scale line 4 to avoid insufficient or excessive sample volume affecting subsequent testing.

[0022] The sealing ring 11 fixed at the end of the sampling cylinder 1 is attached to the wall of the push-pull rod 9, which can enhance the sealing between the push-pull rod and the sampling cylinder 1, prevent air from entering the interior of the sampling cylinder 1 or lubricating oil from leaking from the gap during sampling, ensure the purity and integrity of the sample, and provide a basis for the accuracy of the test results.

[0023] To prevent lubricating oil leakage or air entry into sampling cylinder 1 due to piston movement caused by external force, such as Figure 1-3 As shown, the inner wall of the sampling cylinder 1 has a cavity, and an elastic metal strip 12 is fixedly connected to the inner wall of the cavity. A limit block 13 is fixedly connected to the top of the elastic metal strip 12. A limit slot is opened on the rod wall of the push-pull rod 9. The limit block 13 is inserted into the inner wall of the limit slot. A pull rod 14 is fixedly connected to the bottom of the limit block 13. The bottom end of the pull rod 14 extends through the cavity to the outside of the sampling cylinder 1 and is fixedly connected to a pull ring 15.

[0024] Once the sample reaches the preset volume, the elasticity of the elastic metal strip 12 pushes the limiting block 13 into the limiting slot of the push-pull rod 9, fixing the push-pull rod 9 to the piston 8 and preventing the lubricating oil in the sampling cylinder 1 from leaking or air from entering due to the piston moving due to external force. When it is necessary to discharge the sample, pull the pull ring 15 on the outside of the sampling cylinder 1, and the pull rod 14 drives the limiting block 13 to compress the elastic metal strip 12, causing the limiting block 13 to disengage from the limiting slot. After unlocking, push the handle 10 to drive the piston 8 to slide inward, and the lubricating oil sample in the sampling cylinder 1 can be pushed out, completing the sample transfer.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sampling device for lubricating oil detection, comprising a sampling cylinder (1) and a connector (2), characterized in that: The connector (2) is fixedly connected to the end of the sampling cylinder (1). The inner wall of the connector (2) is threaded with a threaded connector (5). The end of the threaded connector (5) away from the connector (2) is fixedly connected with a connecting hose (6). The end of the connecting hose (6) away from the threaded connector (5) is fixedly connected with a sampling needle tube (7). The inner wall of the sampling cylinder (1) is slidably provided with a piston (8). The end of the piston (8) is fixedly connected with a push-pull rod (9). The end of the push-pull rod (9) away from the piston (8) extends to the outside of the sampling cylinder (1) and is fixedly connected with a handle (10).

2. A sampling device for lubricating oil detection according to claim 1, characterized in that: The sampling tube (1) has an opening on its wall. A glass strip (3) is fixedly connected to the inner wall of the opening. The sampling tube (1) has a scale line (4) on the inner wall of the opening.

3. The sampling device for lubricating oil testing according to claim 1, characterized in that: The connecting hose (6) is configured as a folded tube, and the sampling needle tube (7) has an oblique opening at its opening.

4. The sampling device for lubricating oil according to claim 1, wherein: The sampling tube (1) is fixedly connected to a sealing ring (11) at its end, and the inner wall of the sealing ring (11) is fitted onto the wall of the push-pull rod (9).

5. The sampling device for lubricating oil according to claim 1, wherein: The inner wall of the sampling tube (1) is provided with a cavity, and an elastic metal strip (12) is fixedly connected to the inner wall of the cavity. A limit plug (13) is fixedly connected to the top of the elastic metal strip (12). A limit slot is provided on the rod wall of the push-pull rod (9), and the limit plug (13) is inserted into the inner wall of the limit slot.

6. A sampling device for lubricating oil testing according to claim 5, characterized in that: The bottom of the limiting plug (13) is fixedly connected to a pull rod (14), and the bottom end of the pull rod (14) extends through the cavity to the outside of the sampling cylinder (1) and is fixedly connected to a pull ring (15).

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