One-way oil injection leakage-proof connector

Abstract

The utility model discloses a one-way oil injection leakproof connector which comprises a double-external-thread-head structure and an oil injection connector body, the oil injection connector body is provided with an inner cavity part, and a conical face is arranged in the middle of the inner cavity part. One end of the oil injection connector is connected with an internal thread part of the rotating nut, and a limiting check ring is arranged on the rotating nut. An inner cavity part of the oil injection joint is connected with an oil injection core, one end of the oil injection core is an oil injection connecting part, the other end of the oil injection core is a conical head, a step part is arranged on the oil injection core, a sealing groove is formed in the oil injection core, and a T-shaped through hole is formed in the oil injection core; a sealing ring is arranged on the sealing groove of the oil injection core, and sealing between the sealing groove and the inner cavity of the oil injection connector is achieved. According to the oil injection connector of the rotating nut structure, an oil way can be closed immediately only by screwing the rotating nut, and the oil injection connector is not affected by the oil pressure in equipment and the oil pressure of the outside. Only four parts are needed, the structure is simple, and the performance is reliable.

Description

Technical Field

[0001] This utility model relates to the field of pipe joint manufacturing technology, and in particular to a one-way oil injection leak-proof joint. Background Technology

[0002] Currently, when adding oil to equipment, it is generally necessary to open the oil cap and oil seal, then pour the oil into the equipment's oil tank, and then replace the oil seal and oil cap. This operation is cumbersome, time-consuming, and labor-intensive. When the oil pressure inside the equipment is too high, the oil may impact the oil cap, leading to oil leaks or safety hazards. Alternatively, some operators may fail to turn off the switch in time after adding oil to a regular hose connector, sometimes resulting in overfilling of oil or oil from the hose spraying onto the ground.

[0003] Chinese Patent Publication (Announcement) No.: CN219712441U, Patent Title: A Self-Sealing Oil Injection Connector, which discloses the following technical solution: "

[0004] This utility model is implemented as follows: a self-sealing oil injection connector, including a housing, one end of the housing is provided with a slot, the housing is provided with a first cavity and a second cavity that are connected, the first cavity is connected to the outside through the slot, oil enters the first cavity and the second cavity along the slot... and prevents the plug from falling out of the housing, the side wall of the housing away from the plug is provided with a plurality of oil outlet holes evenly, the oil in the first cavity and the second cavity enters the oil tank of the equipment along the oil outlet holes" and achieves the following technical effect: "

[0010] The beneficial effect of this utility model is: the structure of this utility model is reasonable... when the oil pressure in the equipment rises, the plug and the housing abut together, playing a self-sealing role, avoiding oil leakage, eliminating safety hazards, convenient operation, saving time and effort"

[0004] This type of spring-loaded oil filler cap can only achieve a self-sealing function when the oil pressure inside the equipment rises to the same level as the external oil pressure, at which point the plug, under the action of the spring force, abuts against the housing. If the oil pressure inside the equipment is only half or lower than the external oil pressure, this type of oil filler cap cannot achieve the function of closing at any time.

[0005] Therefore, the market urgently needs an oil filling connector with a switch function at the oil inlet. Utility Model Content

[0006] The purpose of this invention is to provide a one-way oil injection leak-proof connector to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical measures: a one-way oil injection leak-proof connector, characterized in that: it includes an oil injection connector that is directly threaded to an external oil supply unit; the oil injection connector has a double external thread head structure, with a first external thread and a second external thread at each end; the oil injection connector has a hollow stepped inner cavity, with a tapered surface in the middle of the inner cavity; the first external thread of the oil injection connector is connected to the internal thread of a rotating nut, and a limit retaining ring is provided on the rotating nut; an oil injection core is connected to the inner cavity of the oil injection connector, one end of the oil injection core is an oil injection connection part, and the other end of the oil injection core is a tapered head; a stepped part matching the limit retaining ring is provided on the oil injection core; a sealing groove is provided on the oil injection core; a T-shaped through hole is provided inside the oil injection core; a sealing ring is provided on the sealing groove of the oil injection core to achieve a seal between the sealing core and the inner cavity of the oil injection connector.

[0008] Compared with existing technologies, the advantages of this invention are: this oil injection connector with a rotating nut structure can shut off the oil circuit at any time simply by turning the rotating nut, unaffected by differences in oil pressure inside the equipment or in the external oil pressure. It consists of only four parts, has a simple structure, and is reliable in performance.

[0009] As an improvement to this utility model, the rotating nut is provided with an opening mark. The purpose of this design is that the opening mark serves as a marker to indicate the size of the internal opening gap of the oil filling core.

[0010] As an improvement of this utility model, the oil injection connection is pagoda-shaped. The purpose of choosing this design is that the pagoda-shaped structure is suitable for self-tightening rubber tubes, requiring no lubrication or clamping, and is easy to install.

[0011] As an improvement to this invention, the cone angle of the cone head and the cone angle of the cone surface are the same. The purpose of this design is that the contact area is larger and the sealing effect is better when two contact surfaces with the same angle are used together. Attached Figure Description

[0012] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0013] In the attached diagram:

[0014] Figure 1 This is a schematic diagram of the one-way oil injection leak-proof connector described in this utility model.

[0015] Figure 2 This is a schematic diagram of the rotating nut described in this utility model.

[0016] Figure 3 This is a plan view of the oil injection core described in this utility model.

[0017] Figure 4 This is a plan view of the oil injection connector described in this utility model.

[0018] Explanation of reference numerals in the attached drawings: 1. Oil filling connector; 2. First external thread; 3. Second external thread; 4. Inner cavity; 5. Tapered surface; 6. Rotary nut; 7. Internal thread; 8. Limiting ring; 9. Oil filling core; 10. Oil filling connection; 11. Tapered head; 12. Stepped part; 13. Sealing groove; 14. T-shaped through hole; 15. Sealing ring; 16. Opening mark. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] Example 1

[0021] Please refer to Figure 1 -4.

[0022] This embodiment provides a one-way oil filling leak-proof connector, including an oil filling connector 1 that is directly threaded to an external oil supply unit. Please refer to [reference needed]. Figure 4 The oil filling connector 1 has a double external thread head structure, with a first external thread part 2 and a second external thread part 3 respectively provided at both ends. The oil filling connector 1 has a hollow stepped inner cavity part 4, and a tapered surface 5 is provided in the middle part of the inner cavity part 4. The internal thread part 7 of the rotating nut 6 is connected to the first external thread part 2 of the oil filling connector 1.

[0023] In the embodiments of this utility model application, please refer to Figure 2 The rotating nut 6 is provided with a limit retaining ring 8; the inner cavity 4 of the oil injection connector 1 is connected to an oil injection core 9.

[0024] Furthermore, the rotating nut 6 is provided with an opening mark 16. The opening mark 16 is an arrow mark, and its position indicates the size of the internal opening gap of the oil filling core 9. The specific operation method is as follows: after tightening the rotating nut 6 clockwise, remember the position of the arrow pointing to the opening mark 16, then unscrew it counterclockwise. At this time, remember the angle of unscrewing. The larger the angle, the larger the gap between the conical head 11 of the oil filling core 9 and the conical surface 5 of the oil filling connector 1.

[0025] In the embodiments of this utility model application, please refer to Figure 3One end of the oil injection core 9 is an oil injection connection part 10, and the other end of the oil injection core 9 is a conical head 11. A stepped part 12 matching the limiting ring 8 is provided on the oil injection core 9. A sealing groove 13 is provided on the oil injection core 9. A T-shaped through hole 14 is provided inside the oil injection core 9.

[0026] Furthermore, a sealing ring 15 is provided on the sealing groove 13 of the oil injection core 9 to achieve a seal between it and the inner cavity 4 of the oil injection connector 1.

[0027] Furthermore, the oil injection connection 10 is pagoda-shaped. The pagoda-shaped structure is suitable for self-tightening rubber tubes, requiring no lubrication or clamping, and is easy to install.

[0028] Furthermore, the cone angle of the conical head 11 and the cone angle of the conical surface 5 are the same. With two contact surfaces having the same angle, the contact area will be larger, resulting in a better sealing effect.

[0029] It should be noted that the second external thread 3 of the oil filling connector 1 can be modified according to customer requirements, with common specifications including ZG1 / 4, ZG1 / 8, Z1 / 8, and Z1 / 4. When the pressure of the oil filling connection 10 of the oil filling core 9 is low, a clamp is not required; when the pressure is high, a hose with a clamp is used for connection. The material of this product is selected according to customer requirements: carbon steel or stainless steel. Carbon steel is galvanized and passivated, with a zinc coating thickness of 0.008-0.012 mm, and undergoes a 120-hour salt spray test. Stainless steel is pickled. Under non-special conditions, the service life is based on the service life of the sealing ring. The service life of ordinary NBR material is 5-10 years, and that of fluororubber is 5-15 years.

[0030] This embodiment provides a one-way oil filling leak-proof connector, which is connected as follows: the second external thread 3 of the oil filling connector 1 is directly threaded to the external oil supply part; the first external thread 2 of the oil filling connector 1 is threaded to the internal thread 7 of the rotary connector; and the oil filling core 9 is sealed to the inner cavity 4 of the oil filling connector 1 through a sealing ring 15. When the rotary nut 6 is screwed in, its limiting retaining ring 8 presses against the stepped part 12 of the oil filling core 9, causing the entire oil filling core 9 to move forward and achieve a slow seal.

[0031] The beneficial effects of this utility model are as follows: the oil injection connector 1 with this rotating nut 6 structure can shut off the oil circuit at any time simply by turning the rotating nut 6, regardless of the difference in oil pressure inside the equipment or outside the equipment. It consists of only 4 parts, has a simple structure, and is reliable in performance.

[0032] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A one-way oil injection leak-proof joint, characterized in that: The system includes an oil injection connector (1) that is directly threaded to an external oil supply unit. The oil injection connector (1) has a double external thread structure, with a first external thread (2) and a second external thread (3) at each end. The oil injection connector (1) has a hollow stepped inner cavity (4), with a tapered surface (5) in the middle of the inner cavity (4). The first external thread (2) of the oil injection connector (1) is connected to the internal thread (7) of a rotating nut (6), and a limit retaining ring (8) is provided on the rotating nut (6). The inner cavity (4) of the oil injection connector (1) is connected to the internal thread (7) of a rotating nut (6). An oil injection core (9) is connected. One end of the oil injection core (9) is an oil injection connection part (10), and the other end of the oil injection core (9) is a conical head (11). A stepped part (12) matching the limiting retaining ring (8) is provided on the oil injection core (9). A sealing groove (13) is provided on the oil injection core (9). A T-shaped through hole (14) is provided inside the oil injection core (9). A sealing ring (15) is provided on the sealing groove (13) of the oil injection core (9) to achieve a seal with the inner cavity (4) of the oil injection connector (1).

2. The one-way oil injection leak-proof joint according to claim 1, characterized in that: An opening mark (16) is provided on the rotating nut (6).

3. The one-way oil injection leak-proof joint according to claim 1, characterized in that: The oil injection connection (10) is pagoda-shaped.

4. The one-way oil injection leak-proof joint according to claim 1, characterized in that: The cone angle of the cone head (11) is the same as that of the cone surface (5).

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