Quick-insertion straight-through grease injection connector

Abstract

The utility model discloses a quick-plug straight-through grease injection connector which comprises a connector body, a clamping jaw, a high-pressure ring and an annular elastic piece, a connecting cavity is formed in the connector body, the clamping jaw and the high-pressure ring are arranged in the connecting cavity in a matched mode, the annular elastic piece is fixedly connected to the end face of one end of the high-pressure ring, and the end face of one end of the clamping jaw abuts against the annular elastic piece. Connection with connecting pipes such as an oil pipe or a grease injection connector is achieved through the clamping jaw, connection is convenient, meanwhile, the connection effect is better, meanwhile, the movable cavity is formed between the first fixing block and the second fixing block, the movable cavity is matched with the third fixing block on the clamping jaw, and therefore the clamping jaw cannot be disengaged from the connector body due to too large pressure in the working process.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline valves, in particular to a quick-insert straight-through grease injection joint. Background Art

[0002] In the field of valves of API6D and API6A (American Petroleum Institute), the grease joint is an indispensable and important component. It must not only be able to resist hydrogen sulfide and carbon dioxide corrosion, but also be able to withstand high pressure (liquid pressure or gas pressure). The selection of materials must also meet the requirements of API6A and NACE (American Association of Corrosion Engineers) MR0175. The main functions of the grease joint are three: 1. Release the pressure of the valve cavity through the grease joint; 2. Inject the external medium into the valve cavity through the grease joint; 3. The grease joint itself must be absolutely one-way sealed under the pressure of the valve cavity (its essence is to act as a one-way valve: under a certain pressure, the medium flows in from one end of the grease joint and can flow out smoothly from the other end of the grease joint, but not vice versa.

[0003] At present, when the grease injection joints in the prior art are connected to the connecting pipes such as the oil pipe in use, they are mostly connected by threads. Since the connection is contaminated with grease, the threaded connection is prone to slipping during the disassembly process, resulting in the grease injection joint being unable to be disassembled from the connecting pipes such as the oil pipe. Summary of the invention

[0004] The purpose of the utility model is to provide a quick-insert straight-through grease injection joint to solve the problem mentioned in the above background technology that the grease injection joints in the current prior art are mostly connected with connecting pipes such as oil pipes in use by means of threads. Since the connection is contaminated with grease, the threaded connection at this time is prone to slipping during the disassembly process, resulting in the grease injection joint being unable to be disassembled from the connecting pipes such as oil pipes.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a quick-insert straight-through grease injection joint, comprising a joint body, a clamping claw, a high-pressure ring and an annular spring piece, a connecting cavity is opened in the joint body, a clamping claw and a high-pressure ring are arranged in the connecting cavity, an annular spring piece is fixedly connected to the end face of the high-pressure ring, and the end face of one end of the clamping claw and the annular spring piece are mutually abutted.

[0006] Preferably, a first fixing block and a second fixing block are fixedly connected in the connecting cavity, and a movable cavity is formed between the first fixing block and the second fixing block.

[0007] Preferably, a third fixing block is fixedly connected to the outer wall of the claw, and the third fixing block moves in the movable cavity.

[0008] Preferably, the inner circle of the annular elastic sheet is bent in the opposite direction to the outer circle.

[0009] Preferably, a sealing ring is provided at the other end of the high-pressure ring in the connecting cavity, and the high-pressure ring is located between the sealing ring and the claw.

[0010] Preferably, the surface of the first fixing block is in contact with the surface of the high-pressure ring.

[0011] Beneficial Effects

[0012] Compared with the existing technology, the beneficial effects of the utility model are:

[0013] The utility model realizes connection with connecting pipes such as oil pipes or grease injection joints through the claws, which makes the connection convenient and has a better connection effect. At the same time, an active cavity is formed between the first fixing block and the second fixing block, and the third fixing block on the claw cooperates with the claw to prevent the claw from separating from the joint body due to excessive pressure during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the internal structure for practical purposes;

[0015] Figure 2 It is a schematic diagram of the enlarged structure of point A of the utility model.

[0016] 1. Joint body; 2. Clamping claw; 3. High-pressure ring; 4. First fixing block; 5. Second fixing block; 6. Active cavity;

[0017] 7. Third fixing block; 8. Annular spring piece; 9. Sealing ring; 10. Connecting cavity; 81. Outer ring; 82. Inner ring. DETAILED DESCRIPTION

[0018] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore are not to be construed as limiting the present invention. In addition, the terms "first", "second" and "third" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance.

[0020] like Figure 1-2 It is a structural schematic diagram of a quick-insert straight-through grease injection joint of a preferred embodiment of the utility model. In this embodiment, a quick-insert straight-through grease injection joint includes a joint body 1, a claw 2, a high-pressure ring 3 and an annular spring piece 8. A connecting cavity 10 is opened in the joint body 1, and the claw 2 and the high-pressure ring 3 are arranged in the connecting cavity 10. The end face of the high-pressure ring 3 is fixedly connected with the annular spring piece 8, and the end face of the claw 2 and the annular spring piece 8 are abutted against each other. During the connection process, the claw 2 can squeeze the annular spring piece 8 to protect the claw 2 from collision with the high-pressure ring 3, and play a resetting role.

[0021] In this embodiment, a first fixed block 4 and a second fixed block 5 are fixedly connected in the connecting cavity 10, and a movable cavity 6 is formed between the first fixed block 4 and the second fixed block 5; and a third fixed block 7 is fixedly connected to the outer wall of the claw 2, and the third fixed block 7 is movable in the movable cavity 6, and a movable cavity 6 is formed between the first fixed block 4 and the second fixed block 5, cooperating with the third fixed block 7 on the claw 2, so that the claw 2 will not be separated from the joint body 1 due to excessive pressure during operation.

[0022] In this embodiment, the inner ring 82 of the annular spring piece 8 is bent in the opposite direction to the outer ring 81 . This structural arrangement enables the annular spring piece 8 to have elasticity.

[0023] In this embodiment, a sealing ring 9 is provided at the other end of the high pressure ring 3 in the connecting chamber 10 , and the high pressure ring 3 is located between the sealing ring 9 and the claw 2 . This structural setting improves the sealing performance of the internal connection of the connecting chamber 10 .

[0024] In this embodiment, the surface of the first fixing block 4 contacts the surface of the high-pressure ring 3 .

[0025] The above-mentioned quick-insert straight-through grease injection joint, when the claw 2 is used to connect with the connecting pipe such as the oil pipe or the grease injection joint, the claw 2 needs to be displaced inward until the connecting pipe such as the oil pipe or the grease injection joint is inserted into the claw 2, and then released. The annular spring piece 8 uses its own elasticity to restore the claw 2 to its original position. At this time, the third fixed block 7 moves in the movable cavity 6. Through this design, it is convenient for quick connection and more stable.

[0026] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.

Claims

1. A quick-insert straight-through grease injection joint, comprising a joint body (1), a clamping claw (2), a high-pressure ring (3) and an annular spring sheet (8), characterized in that: A connecting cavity (10) is provided in the joint body (1), a clamping claw (2) and a high-pressure ring (3) are arranged in the connecting cavity (10), an annular spring sheet (8) is fixedly connected to one end face of the high-pressure ring (3), and one end face of the clamping claw (2) and the annular spring sheet (8) are mutually abutted.

2. According to claim 1, a quick-insert straight-through grease injection connector is characterized in that: A first fixing block (4) and a second fixing block (5) are fixedly connected in the connection cavity (10), and a movable cavity (6) is formed between the first fixing block (4) and the second fixing block (5).

3. According to claim 1, the quick-insert straight-through grease injection connector is characterized in that: The outer wall of the clamping claw (2) is fixedly connected to a third fixing block (7), and the third fixing block (7) moves in the movable cavity (6).

4. The quick-insert straight-through grease injection connector according to claim 1, characterized in that: The inner ring (82) of the annular spring sheet (8) is bent in the opposite direction to the outer ring (81).

5. The quick-insert straight-through grease injection connector according to claim 2, characterized in that: A sealing ring (9) is provided at the other end of the high-pressure ring (3) in the connecting cavity (10), and the high-pressure ring (3) is located between the sealing ring (9) and the claw (2).

6. The quick-insert straight-through grease injection connector according to claim 2, characterized in that: The surface of the first fixing block (4) is in contact with the surface of the high-pressure ring (3).

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