Leak-proof seal assembly for high pressure injectors

Abstract

The utility model relates to high pressure injector technical field, concretely is high pressure injector's anti -leakage sealing assembly, including main sleeve, and install first external pipe and second external pipe in the inside of main sleeve, first external pipe and second external pipe are close to one end of two connections and are integrally formed with a first convex ring and second convex ring respectively, the main sleeve inner ring wall is integrally formed with a limit ring, first convex ring and second convex ring all are located the left side of limit ring. The utility model discloses through the cooperation of main sleeve, first external pipe and second external pipe, and the setting of first convex ring, second convex ring and limit ring, make two inner sealing rings when the connecting sleeve is tightened and closely fit, form double -sealed structure, effectively prevent high pressure fluid from the connecting part of first external pipe and second external pipe leakage, improved the reliability of sealing. Meanwhile, the threaded connection mode is convenient to install and detach, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure ejector technology, specifically to a leak-proof sealing assembly for high-pressure ejectors. Background Technology

[0002] High-pressure injectors are widely used in many fields such as industrial production, automobile manufacturing, and chemical industry. For example, in the fuel injection system of automobile engines, high-pressure injectors are required to accurately inject fuel into the engine cylinders at high pressure; in the chemical industry, high-pressure injectors are often used for high-pressure atomization injection of materials.

[0003] When a high-pressure injector is in operation, the internal fluid is under high pressure, which places extremely high demands on its sealing performance. Leakage not only wastes the fluid medium and affects the normal operation of the equipment, but can also cause safety hazards. For example, fuel leaks can lead to fires, while leaks of toxic or hazardous chemical fluids can pollute the environment and endanger human health.

[0004] Existing high-pressure ejector sealing structures mostly employ a single seal or a simple seal combination. On the one hand, under long-term high pressure, vibration, and other complex operating conditions, a single seal is prone to wear and aging, leading to seal failure. On the other hand, simple seal combinations cannot effectively address the leakage risks that may occur at different connection points of high-pressure fluid, resulting in poor sealing reliability. Moreover, some sealing structures are inconvenient to install and disassemble, and when seals are damaged and need replacement, the operation is complicated, increasing maintenance time and costs.

[0005] In light of this, we propose a leak-proof sealing assembly for high-pressure injectors. Utility Model Content

[0006] To overcome the above deficiencies, this utility model provides a leak-proof sealing assembly for high-pressure injectors.

[0007] The technical solution of this utility model is:

[0008] The leak-proof sealing assembly of the high-pressure injector includes a main sleeve and a first outer connector and a second outer connector installed inside the main sleeve. The first and second outer connectors have a first convex ring and a second convex ring integrally formed at their ends near the connection point, respectively. A limiting ring is integrally formed on the inner ring wall of the main sleeve. Both the first and second convex rings are located to the left of the limiting ring. A connecting sleeve is coaxially threaded to the left end of the main sleeve. The first outer connector includes a threaded tube threaded to the inner ring wall of the connecting sleeve. Two inner sealing rings are provided between the first and second convex rings. When the connecting sleeve is tightened on the outer ring wall of the threaded tube, the two inner sealing rings fit tightly together. Through the cooperation of the main sleeve, the first and second outer connectors, and the arrangement of the first convex ring, the second convex ring, and the limiting ring, the two inner sealing rings fit tightly together when the connecting sleeve is tightened, forming a double sealing structure. This effectively prevents high-pressure fluid from leaking from the connection point of the first and second outer connectors, improving the reliability of the seal. Simultaneously, the threaded connection facilitates installation and disassembly, reducing maintenance costs.

[0009] As a preferred technical solution, the main sleeve has an installation groove on the right side of the limiting plate, and an outer sealing gasket is fixedly installed in the installation groove. The inner ring wall of the outer sealing gasket is tightly fitted with the outer ring wall of the second outer connecting pipe. The installation groove on the right side of the main sleeve and the fixed installation of the outer sealing gasket ensure a tight fit between the inner ring wall of the outer sealing gasket and the outer ring wall of the second outer connecting pipe, further enhancing the sealing effect, preventing fluid leakage from the gap between the main sleeve and the second outer connecting pipe, and improving the leakage prevention performance of the entire sealing assembly.

[0010] As a preferred technical solution, the connecting sleeve has a connecting ring integrally formed coaxially at one end near the main sleeve, and the main sleeve has a connecting groove that is threadedly connected to the connecting ring. The connecting ring at the end of the connecting sleeve near the main sleeve is threadedly connected to the connecting groove on the main sleeve. This double-threaded connection structure not only increases the stability of the connection but also further improves the sealing performance, preventing fluid leakage from the connection between the connecting sleeve and the main sleeve.

[0011] As a preferred technical solution, when the connecting sleeve is screwed onto the threaded pipe, the connecting ring and the connecting groove screw synchronously. This synchronous screwing of the connecting ring and the connecting groove ensures the synchronicity and stability of the installation process, allowing the sealing structure to be evenly stressed and avoiding sealing problems caused by uneven stress, thus improving the reliability and stability of the seal.

[0012] As a preferred technical solution, an outer sealing ring is provided between the second convex ring and the limiting ring, and the outer sealing ring is fixedly connected to the inner wall of the limiting ring. The provision of an outer sealing ring between the second convex ring and the limiting ring, and its fixed connection to the inner wall of the limiting ring, forms an additional sealing barrier, effectively preventing fluid leakage from the gap between the second convex ring and the limiting ring, and further improving the leak-proof performance of the sealing assembly.

[0013] As a preferred technical solution, the first outer connector further includes a insertion connector located inside the main sleeve. An annular sealing block is provided on the inner annular wall of the main sleeve, and the inner annular wall of the annular sealing block is tightly fitted to the outer circumferential wall of the insertion connector. The tight fit between the insertion connector of the first outer connector and the annular sealing block on the inner annular wall of the main sleeve forms another layer of sealing protection.

[0014] As a preferred technical solution, the diameter of the inner ring wall of the annular sealing block is smaller towards the inner end of the main sleeve, and the smallest diameter is smaller than the diameter of the insertion pipe. This tapered design allows for an interference fit when the insertion pipe is inserted, further improving the sealing performance and effectively preventing fluid leakage. It should be noted that during installation, the insertion pipe is first inserted into the main sleeve, and then the annular sealing block is inserted between the main sleeve and the insertion pipe.

[0015] As a preferred technical solution, two threaded rods are symmetrically fixedly connected to the right end of the main sleeve, and a fixing ring is fixedly connected to the outer circumference of the second outer tube. The threaded rods pass through the fixing ring, and an adjusting knob that is threaded to the outer wall of the threaded rods is rotatably mounted on the fixing ring. By using the threaded rods and adjusting knob, the tightness of the connection between the first and second outer tubes can be increased by physical means, thereby effectively improving the sealing performance.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention, through the cooperation of the main sleeve, the first outer pipe, and the second outer pipe, and the arrangement of the first convex ring, the second convex ring, and the limiting ring, ensures that the two inner sealing rings fit tightly together when the connecting sleeve is tightened, forming a double sealing structure. This effectively prevents high-pressure fluid from leaking from the connection between the first and second outer pipes, improving the reliability of the seal. Simultaneously, the threaded connection facilitates installation and disassembly, reducing maintenance costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0020] Figure 3 In this utility model Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a schematic diagram of the main sleeve and connecting sleeve in this utility model;

[0022] The meanings of the labels in the diagram are as follows:

[0023] 1. Main sleeve; 10. Connecting groove; 11. Limiting ring; 12. Mounting groove; 2. Connecting sleeve; 20. Connecting ring; 21. Annular sealing block; 3. First outer pipe; 30. Threaded pipe; 31. Insert pipe; 310. First convex ring; 4. Second outer pipe; 40. Second convex ring; 41. Outer sealing gasket; 5. Fixing ring; 50. Adjusting knob; 6. Threaded rod; 7. Inner sealing ring; 8. Outer sealing ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-4 This utility model provides a technical solution:

[0026] The leak-proof sealing assembly of the high-pressure injector includes a main sleeve 1, and a first outer pipe 3 and a second outer pipe 4 installed inside the main sleeve 1. The first outer pipe 3 and the second outer pipe 4 have a first convex ring 310 and a second convex ring 40 integrally formed at the ends near their connection. A limiting ring 11 is integrally formed on the inner ring wall of the main sleeve 1. The first convex ring 310 and the second convex ring 40 are both located to the left of the limiting ring 11. A connecting sleeve 2 is coaxially threaded to the left end of the main sleeve 1. The first outer pipe 3 includes a threaded pipe 30 that is threaded to the inner ring wall of the connecting sleeve 2. Two inner sealing rings 7 are provided between the first convex ring 310 and the second convex ring 40. When the connecting sleeve 2 is tightened on the outer ring wall of the threaded pipe 30, the two inner sealing rings 7 fit tightly together. Through the cooperation of the main sleeve 1, the first outer pipe 3, and the second outer pipe 4, and the arrangement of the first convex ring 310, the second convex ring 40, and the limiting ring 11, the two inner sealing rings 7 fit tightly together when the connecting sleeve 2 is tightened, forming a double sealing structure. This effectively prevents high-pressure fluid from leaking from the connection between the first outer pipe 3 and the second outer pipe 4, improving the reliability of the seal. At the same time, the threaded connection facilitates installation and disassembly, reducing maintenance costs.

[0027] In a preferred embodiment, the main sleeve 1 has a mounting groove 12 on the right side of the limiting plate. An outer sealing gasket 41 is fixedly installed in the mounting groove 12, and the inner ring wall of the outer sealing gasket 41 is tightly fitted with the outer ring wall of the second outer connecting pipe 4. The mounting groove 12 on the right side of the main sleeve 1 and the fixed installation of the outer sealing gasket 41 ensure a tight fit between the inner ring wall of the outer sealing gasket 41 and the outer ring wall of the second outer connecting pipe 4, further enhancing the sealing effect and preventing fluid leakage from the gap between the main sleeve 1 and the second outer connecting pipe 4, thus improving the leak-proof performance of the entire sealing assembly.

[0028] In a preferred embodiment, the connecting sleeve 2 has a connecting ring 20 integrally formed coaxially at one end near the main sleeve 1, and the main sleeve 1 has a connecting groove 10 that is threadedly connected to the connecting ring 20. The connecting ring 20 at the end of the connecting sleeve 2 near the main sleeve 1 is threadedly connected to the connecting groove 10 on the main sleeve 1. This double-threaded connection structure not only increases the stability of the connection, but also further improves the sealing performance, preventing fluid leakage from the connection between the connecting sleeve 2 and the main sleeve 1.

[0029] In a preferred embodiment, when the connecting sleeve 2 is screwed onto the threaded pipe 30, the connecting ring 20 and the connecting groove 10 screw synchronously. This synchronous screwing of the connecting ring 20 and the connecting groove 10 ensures the synchronicity and stability of the installation process, allowing the sealing structure to be evenly stressed, avoiding sealing problems caused by uneven stress, and improving the reliability and stability of the seal.

[0030] In a preferred embodiment, an outer sealing ring 8 is provided between the second convex ring 40 and the limiting ring 11, and the outer sealing ring 8 is fixedly connected to the inner wall of the limiting ring 11. The provision of the outer sealing ring 8 between the second convex ring 40 and the limiting ring 11, and its fixed connection to the inner wall of the limiting ring 11, forms an additional sealing barrier, effectively preventing fluid leakage from the gap between the second convex ring 40 and the limiting ring 11, further improving the leak-proof performance of the sealing assembly.

[0031] As a preferred embodiment, the first outer tube 3 further includes a insertion tube 31 located inside the main sleeve 1. An annular sealing block 21 is provided on the inner annular wall of the main sleeve 1, and the inner annular wall of the annular sealing block 21 is tightly fitted with the outer circumferential wall of the insertion tube 31. The insertion tube 31 of the first outer tube 3 is tightly fitted with the annular sealing block 21 on the inner annular wall of the main sleeve 1, forming another sealing defense line.

[0032] In this preferred embodiment, the diameter of the inner ring wall of the annular sealing block 21 is smaller closer to the inner end of the main sleeve 1, and the smallest diameter is smaller than the diameter of the insertion pipe 31. This tapered design allows for an interference fit when the insertion pipe 31 is inserted, further improving the sealing performance and effectively preventing fluid leakage. It should be noted that during installation, the insertion pipe 31 is first inserted into the main sleeve 1, and then the annular sealing block 21 is inserted between the main sleeve 1 and the insertion pipe 31.

[0033] In a preferred embodiment, two threaded rods 6 are symmetrically fixedly connected to the right end of the main sleeve 1, and a retaining ring 5 is fixedly connected to the outer circumference of the second outer tube 4. The threaded rods 6 pass through the retaining ring 5, and an adjusting knob 50, which is threaded to the outer wall of the threaded rods 6, is rotatably mounted on the retaining ring 5. By using the threaded rods 6 and the adjusting knob 50, the tightness of the connection between the first outer tube 3 and the second outer tube 4 can be increased by physical means, thereby effectively improving the sealing performance.

[0034] When the leak-proof sealing assembly of the high-pressure ejector of this utility model is in use, firstly, the main sleeve 1, the first outer pipe 3, and the second outer pipe 4 cooperate with the limiting ring 11 through their respective convex rings. During the tightening of the connecting sleeve 2, the two inner sealing rings 7 between the first convex ring 310 and the second convex ring 40 are tightly fitted together to form a double seal, effectively preventing high-pressure fluid from leaking from the connection part of the first and second outer pipes. The outer sealing gasket 41 in the mounting groove 12 on the right side of the limiting plate of the main sleeve 1 is tightly fitted with the outer ring wall of the second outer pipe 4, further preventing fluid leakage at the gap between the main sleeve 1 and the second outer pipe 4.

[0035] The connecting sleeve 2 is threadedly connected to the connecting groove 10 of the main sleeve 1 via the connecting ring 20. The double thread structure enhances the connection stability and sealing performance. When the connecting sleeve 2 is screwed, the connecting ring 20 and the connecting groove 10 rotate synchronously, ensuring that the sealing structure is evenly stressed. The outer sealing ring 8 fixed between the second convex ring 40 and the limiting ring 11 forms an additional sealing barrier to prevent fluid leakage from the gap between them. The insertion pipe 31 of the first outer pipe 3 is tightly fitted with the annular sealing block 21 on the inner ring wall of the main sleeve 1, and the inner ring wall of the annular sealing block 21 is conical, forming an interference fit with the insertion pipe 31, further strengthening the seal.

[0036] During installation, first insert the connector 31 into the main sleeve 1, then insert the annular sealing block 21. The threaded rod 6 at the right end of the main sleeve 1 cooperates with the fixing ring 5 of the second outer connector 4 and the adjusting knob 50 to increase the tightness of the connection between the first and second connecting pipes through physical adjustment, ultimately achieving efficient leak prevention of the entire sealing assembly and ensuring stable operation of the high-pressure injector.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A leak-proof sealing assembly for a high-pressure injector, characterized in that: The main sleeve (1) includes a first outer tube (3) and a second outer tube (4) installed inside the main sleeve (1). The first outer tube (3) and the second outer tube (4) are respectively integrally formed with a first convex ring (310) and a second convex ring (40) near the end where they are connected. The inner ring wall of the main sleeve (1) is integrally formed with a limiting ring (11). The first convex ring (310) and the second convex ring (40) are both located to the left of the limiting ring (11). The left end of the main sleeve (1) is coaxially threaded with a connecting sleeve (2). The first outer tube (3) includes a threaded tube (30) that is threaded to the inner ring wall of the connecting sleeve (2). Two inner sealing rings (7) are provided between the first convex ring (310) and the second convex ring (40). When the connecting sleeve (2) is tightened on the outer ring wall of the threaded tube (30), the two inner sealing rings (7) fit tightly together.

2. The leak-proof sealing assembly of the high-pressure injector as described in claim 1, characterized in that: The main sleeve (1) has an installation groove (12) on the right side of the limiting plate. An outer sealing gasket (41) is fixedly installed in the installation groove (12). The inner ring wall of the outer sealing gasket (41) is tightly fitted with the outer ring wall of the second outer pipe (4).

3. The leak-proof sealing assembly for the high-pressure injector as described in claim 2, characterized in that: The connecting sleeve (2) has a connecting ring (20) integrally formed on one end near the main sleeve (1) on the same axis. The main sleeve (1) has a connecting groove (10) that is threadedly connected to the connecting ring (20).

4. The leak-proof sealing assembly of the high-pressure injector as described in claim 3, characterized in that: When the connecting sleeve (2) is screwed on the threaded tube (30), the connecting ring (20) and the connecting groove (10) are screwed synchronously.

5. The leak-proof sealing assembly for the high-pressure injector as described in claim 4, characterized in that: An outer sealing ring (8) is provided between the second convex ring (40) and the limiting ring (11), and the outer sealing ring (8) is fixedly connected to the inner wall of the limiting ring (11).

6. The leak-proof sealing assembly for the high-pressure injector as described in claim 5, characterized in that: The first outer tube (3) also includes a insertion tube (31) located inside the main sleeve (1). An annular sealing block (21) is provided on the inner annular wall of the main sleeve (1). The inner annular wall of the annular sealing block (21) is in close contact with the outer circumference of the insertion tube (31).

7. The leak-proof sealing assembly for the high-pressure injector as described in claim 6, characterized in that: The diameter of the inner ring wall of the annular sealing block (21) is smaller as it gets closer to the inner end of the main sleeve (1), and the smallest diameter is smaller than the diameter of the insertion pipe (31).

8. The leak-proof sealing assembly for the high-pressure injector as described in claim 7, characterized in that: The right end of the main sleeve (1) is symmetrically fixedly connected to two threaded rods (6), and the outer wall of the second outer tube (4) is fixedly connected to a fixing ring (5). The threaded rods (6) pass through the fixing ring (5), and an adjustment knob (50) that is threaded to the outer wall of the threaded rods (6) is rotatably installed on the fixing ring (5).

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