A high-pressure quick oil filling joint for hydraulic safety coupling

Abstract

The utility model provides a high-pressure quick oil filling joint for a hydraulic safety coupling. The high-pressure quick oil filling joint for a hydraulic safety coupling comprises: an adapter, a high-pressure quick joint, a sealing ring b and a sealing ring a arranged on the hydraulic safety coupling, the high-pressure quick joint is arranged on the adapter, the outer wall of the high-pressure quick joint is provided with a sealing groove 1 and a sealing groove 2, the sealing groove 2 is located below the sealing groove 1, the sealing ring b is arranged on the sealing groove 1, and the sealing ring a is arranged on the sealing groove 2. The high-pressure quick oil filling joint for a hydraulic safety coupling provided by the utility model has the advantages of simple structure, convenient use and quick operation, high pressure bearing capacity and long service life without the need for mechanical or threaded locking structure during insertion.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-pressure joints, and in particular relates to a high-pressure quick oil injection joint for a hydraulic safety coupling. Background Art

[0002] A hydraulic safety coupling is a safety coupling that uses the friction force generated by hydraulic expansion to transmit torque. It needs to be injected with high-pressure oil when in use. Usually, the oil injection interface needs to be threaded or mechanically locked after insertion to offset the axial force of the high-pressure oil on the oil injection interface. Therefore, the structure is relatively complex, and the weak strength of the locking structure limits the upper pressure limit and service life of the oil injection interface. At the same time, the operation time is relatively long. Therefore, in view of this situation, it is necessary to provide a new high-pressure quick oil injection connector for a hydraulic safety coupling to solve the above technical problems. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a high-pressure quick oil injection joint for a hydraulic safety coupling which has a simple structure, is easy to use and quick to operate, does not require mechanical or threaded locking structure when inserted, has a high pressure bearing capacity and a long service life.

[0004] In order to solve the above technical problems, the utility model provides a high-pressure quick oil filling joint for a hydraulic safety coupling, comprising: an adapter, a high-pressure quick joint, a sealing ring b and a sealing ring a arranged on the hydraulic safety coupling, the high-pressure quick joint being arranged on the adapter, the outer wall of the high-pressure quick joint being provided with a sealing groove 1 and a sealing groove 2, the sealing groove 2 being located below the sealing groove 1, the sealing ring b being arranged on the sealing groove 1, and the sealing ring a being arranged on the sealing groove 2.

[0005] As a further solution of the utility model, an adapter mounting thread is provided at the lower outer portion of the adapter, an outer annular oil passage is provided at the middle outer portion of the adapter, and a hexagonal head is provided at the upper outer portion of the adapter.

[0006] As a further solution of the utility model, a sealing surface is provided between the outer annular oil passage and the hexagonal head, and a small-tapered inner hole is provided on the inner side of the adapter.

[0007] As a further solution of the utility model, an inner annular oil passage is provided in the middle of the small-taper inner hole, and a through intermediate oil passage is provided between the outer annular oil passage and the inner annular oil passage.

[0008] As a further solution of the utility model, an external oil circuit connection threaded hole is provided on the inner upper part of the high-pressure quick connector, a main oil channel is provided below the external oil circuit connection threaded hole, and the external oil circuit connection threaded hole is communicated with the main oil channel.

[0009] As a further solution of the utility model, a radial oil channel is provided in the middle of the main oil channel, the radial oil channel connects the main oil channel and the outside of the high-pressure quick connector, and a pressure relief channel is provided at the bottom of the high-pressure quick connector, the pressure relief channel connects the bottom and side of the high-pressure quick connector.

[0010] Compared with the related art, the high-pressure quick oil injection joint for the hydraulic safety coupling provided by the utility model has the following beneficial effects:

[0011] 1. The high-pressure quick connector of the utility model is inserted into the adapter, and a sealed radial oil path is formed through the sealing ring a and the sealing ring b, thereby eliminating the external axial force and realizing quick plugging and unplugging; on the other hand, the tapered inner hole of the adapter makes the axial liquid pressure of the sealing ring b always greater than that of the sealing ring a, ensuring that the high-pressure quick connector is automatically axially locked during the pressurization process without the need for an additional locking device. The utility model has the advantages of simple structure, convenient use and quick operation, high pressure bearing capacity and long service life without the need for mechanical or threaded locking structure during insertion, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the use and assembly of the utility model;

[0014] Figure 2 This is a schematic diagram of the adapter structure of the utility model;

[0015] Figure 3 The utility model is a schematic diagram of the high-pressure quick connector structure.

[0016] In the figure: 100, hydraulic safety coupling; 1, adapter; 1-1, adapter mounting thread; 1-2, intermediate oil channel; 1-3, outer annular oil channel; 1-4, sealing surface; 1-5, hexagonal head; 1-6, inner annular oil channel; 1-7, small taper inner hole; 2, high-pressure quick connector; 2-1, external oil circuit connecting threaded hole; 2-2, main oil channel; 2-3, radial oil channel; 2-4, pressure relief channel; 3, sealing ring b; 4, sealing ring a. DETAILED DESCRIPTION

[0017] Please refer to Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 This is a schematic diagram of the use and assembly of the utility model; Figure 2 This is a schematic diagram of the adapter structure of the utility model; Figure 3The high-pressure quick connector structure diagram of the utility model. The high-pressure quick oil injection connector for the hydraulic safety coupling comprises: an adapter 1, a high-pressure quick connector 2, a sealing ring b3 and a sealing ring a4 arranged on the hydraulic safety coupling 100, the high-pressure quick connector 2 being arranged on the adapter 1, a sealing groove 1 and a sealing groove 2 being arranged on the outer wall of the high-pressure quick connector 2, the sealing groove 2 being located below the sealing groove 1, the sealing ring b3 being arranged on the sealing groove 1, and the sealing ring a4 being arranged on the sealing groove 2.

[0018] An adapter mounting thread 1-1 is provided at the lower outer portion of the adapter 1, an outer annular oil passage 1-3 is provided at the middle outer portion of the adapter 1, and a hexagonal head 1-5 is provided at the upper outer portion of the adapter 1.

[0019] A sealing surface 1-4 is provided between the outer annular oil passage 1-3 and the hexagonal head 1-5, and a small-taper inner hole 1-7 is provided on the inner side of the adapter 1.

[0020] An inner annular oil passage 1-6 is provided in the middle of the small-taper inner hole 1-7, and a through intermediate oil passage 1-2 is provided between the outer annular oil passage 1-3 and the inner annular oil passage 1-6.

[0021] An external oil circuit connection threaded hole 2-1 is provided at the inner upper part of the high-pressure quick connector 2, a main oil channel 2-2 is provided below the external oil circuit connection threaded hole 2-1, and the external oil circuit connection threaded hole 2-1 is communicated with the main oil channel 2-2.

[0022] A radial oil passage 2-3 is provided in the middle of the main oil passage 2-2, and the radial oil passage 2-3 connects the main oil passage 2-2 and the outside of the high-pressure quick connector 2. A pressure relief passage 2-4 is provided at the bottom of the high-pressure quick connector 2, and the pressure relief passage 2-4 connects the bottom and side of the high-pressure quick connector 2.

[0023] Figure 1 The middle label A is the external pipeline. During installation, first match the external pipeline with the external oil circuit connection threaded hole 2-1 of the high-pressure quick connector 2, and use the conical surface to seal. Then, match the adapter mounting thread 1-1 of the adapter 1 in the mounting hole of the hydraulic safety coupling, and use a torque wrench to tighten the hexagonal head 1-5 of the adapter 1 to the specified torque, so that the sealing surface 1-4 of the adapter 1 is close to the conical surface of the hydraulic safety coupling mounting hole to achieve high-pressure sealing. At this point, the assembly before pressure testing is completed, and the structure is simple and easy to operate.

[0024] When in use, directly insert the high-pressure quick connector 2 into the small-taper inner hole 1-7 of the adapter 1 and insert it to the bottom. At this time, the pressure relief channel 2-4 of the high-pressure quick connector 2 will discharge the internal gas to make the insertion smooth, and then the external oil supply equipment will pump oil at high pressure. At this time, the high-pressure oil will pass through the main oil channel 2-2 of the high-pressure quick connector 2, and further flow into the inner annular oil channel 1-6 of the adapter 1 through the radial oil channel 2-3. At this time, the sealing ring a4 installed on the upper part of the high-pressure quick connector 2 and the sealing ring b3 installed on the lower part will prevent the high-pressure oil from leaking upward and downward respectively.

[0025] When the pressure is too high and a slight leakage occurs, the oil leaked downward is discharged from the pressure relief channel 2-4, so that the bottom pressure will not be too high to push out the high-pressure quick connector 2. On the other hand, since the small-taper inner hole 1-7 of the adapter 1 is thin at the top and thick at the bottom, the annular gap area of ​​the sealing ring a4 between the high-pressure quick connector 2 and the small-taper inner hole 1-7 will be smaller than that of the sealing ring b3, so that the axial liquid pressure on the sealing ring b3 is always greater than the axial liquid pressure on the sealing ring a4. Therefore, when pressurized, the high-pressure quick connector 2 is automatically axially locked to further prevent it from coming out. Therefore, no additional locking structure is required, and the bearing pressure is higher.

[0026] The high-pressure oil further flows into the outer annular oil channel 1-3 through the middle oil channel 1-2 of the adapter 1. Under the sealing action of the sealing surface 1-4, the high-pressure oil will not leak to the outside, and further flow into the hydraulic safety coupling to complete the pressure-pressurizing operation. After the oil discharge port of the hydraulic safety coupling is blocked, the external oil pumping equipment is depressurized to normal pressure. At this time, the high-pressure quick connector 2 can be directly pulled out, and the adapter 1 does not need to be disassembled. Therefore, the operation is convenient and fast, and the pressure-pressurizing operation is completed.

[0027] It should be noted that the equipment structure and drawings of the utility model mainly describe the principle of the utility model. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in this field understand the principle of the above utility model, the details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in this field;

[0028] The standard parts used therein can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the structures and principles of the components known to technical personnel in this field can be known by these technical personnel through technical manuals or through conventional experimental methods.

[0029] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations or direct or indirect applications may be made to these embodiments without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the attached claims and their equivalents, which are equally included in the scope of patent protection of the present invention.

Claims

1. A high-pressure quick oil injection joint for a hydraulic safety coupling, characterized in that: include: An adapter, a high-pressure quick connector, a sealing ring b and a sealing ring a are arranged on a hydraulic safety coupling, wherein the high-pressure quick connector is arranged on the adapter, a sealing groove 1 and a sealing groove 2 are opened on the outer wall of the high-pressure quick connector, the sealing groove 2 is located below the sealing groove 1, the sealing ring b is arranged on the sealing groove 1, and the sealing ring a is arranged on the sealing groove 2.

2. The high-pressure quick oil injection joint for the hydraulic safety coupling according to claim 1 is characterized in that: An adapter mounting thread is provided at the lower outer portion of the adapter, an outer annular oil passage is provided at the middle outer portion of the adapter, and a hexagonal head is provided at the upper outer portion of the adapter.

3. The high-pressure quick oil injection joint for the hydraulic safety coupling according to claim 2 is characterized in that: A sealing surface is provided between the outer annular oil passage and the hexagonal head, and a small-taper inner hole is provided on the inner side of the adapter.

4. The high-pressure quick oil injection joint for the hydraulic safety coupling according to claim 3 is characterized in that: An inner annular oil passage is provided in the middle of the small-taper inner hole, and a through intermediate oil passage is provided between the outer annular oil passage and the inner annular oil passage.

5. The high-pressure quick oil injection joint for the hydraulic safety coupling according to claim 1, characterized in that: An external oil circuit connection threaded hole is provided at the inner upper part of the high-pressure quick connector, a main oil channel is provided below the external oil circuit connection threaded hole, and the external oil circuit connection threaded hole is communicated with the main oil channel.

6. The high-pressure quick oil injection joint for the hydraulic safety coupling according to claim 5, characterized in that: A radial oil passage is provided in the middle of the main oil passage, the radial oil passage connects the main oil passage and the outside of the high-pressure quick connector, a pressure relief passage is provided at the bottom of the high-pressure quick connector, the pressure relief passage connects the bottom and side of the high-pressure quick connector.

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