Load box oil delivery pipe joint

Abstract

The utility model discloses a load box oil delivery pipe joint, and relates to the technical field of high-pressure oil pipe joints. The device comprises an oil delivery pipe, a replacement pipe is installed on one side of the oil delivery pipe, fasteners are installed at the two ends of the replacement pipe, a connector base is installed on the side, away from the oil delivery pipe, of the replacement pipe, an oil delivery spray head is installed at the end, away from the fasteners, of the connector base, and the replacement pipe, the fasteners and the connector base are all detachably connected. First sealing rings are installed on the two sides of the replacement connecting pipe, and a second sealing ring is installed between the connector base and the oil conveying spray head. According to the utility model, the detachable fastener, the replaceable connecting pipe and the joint seat are arranged between the oil conveying pipe and the oil conveying spray head, so that the condition that the spray head cannot be blocked when a foundation pile test is carried out is avoided, and the connection sealing performance of each connecting piece is ensured through the table-shaped compression joint surface and the two sealing rings.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-pressure oil pipe joints, and in particular relates to a load box oil delivery pipe joint. Background Art

[0002] During the self-balancing static load test of pile foundation, a high-pressure oil pump is used to fill oil and pressurize the load box on the ground. The load box then transmits the force to the pile body. At the same time, the displacement of the upper and lower pile bodies is tested through the displacement rod. After the pile is formed, the load box can only be pressurized through a high-pressure oil pipe. If the oil pipe is blocked or the oil pipe joint is not connected during the test, the load box cannot be pressurized any further and the test can only be declared a failure. Therefore, the stability of the oil pipe joint must be ensured during use.

[0003] The patent specification with publication number CN112461640A discloses a high-pressure liquid pipe joint that can follow the dynamic stroke of the load box piston when the load box is installed inverted, which includes a lower joint, a sheath and a telescopic inner tube. The lower joint is hollow inside and is used to connect the cylinder body and the sheath. The sheath is hollow inside and its axial direction is consistent with the axial direction of the load box; the telescopic inner tube is completely inserted into the sheath and slides along the axial direction of the sheath under the action of high-pressure liquid. Its length is greater than the relative displacement of the cylinder body and the piston during the load box loading test; one end of the high-pressure liquid pipe passes through the upper plate and is connected to the telescopic inner tube.

[0004] The shortcomings of this technical solution are: the joint structure is composed of an inner tube and an outer tube slidingly connected, and the hydraulic pipe cannot be quickly and conveniently replaced when a failure occurs, so the test results are directly affected when the failure occurs; secondly, the joint is provided with a sliding structure, but because a high-pressure oil pipe is used in the pile balance test, the oil pipe joint will have insufficient sealing during actual use, which may easily lead to oil leakage.

[0005] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0006] The utility model aims to provide a load box oil pipe joint, and the technical problems to be solved are as follows: the existing load box oil pipe joint cannot be effectively and quickly replaced when blocked, and the sealing performance is insufficient.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] A load box oil pipe joint, comprising an oil pipe, a replacement pipe is installed on one side of the oil pipe, fasteners are installed at both ends of the replacement pipe, a joint seat is installed on the side of the replacement pipe away from the oil pipe, an oil nozzle is installed on the end of the joint seat away from the fastener, the replacement pipe, fastener and joint seat are all detachably connected; sealing ring 1 is installed on both sides of the replacement pipe, and sealing ring 2 is installed between the joint seat and the oil nozzle.

[0009] As a further solution of the utility model: both ends of the replacement pipe are provided with inner compression rings, the oil pipe and one end of the joint seat are provided with outer compression rings, the inner sides of the inner compression ring and the outer compression ring are provided with a sealing groove 1, the sealing ring 1 is embedded between two adjacent sealing grooves 1, and annular blocks are provided on both sides of the sealing ring 1 to adapt to the sealing groove 1.

[0010] As a further solution of the utility model: the vertical cross-sections of the inner crimping ring and the outer crimping ring are trapezoidal and symmetrical about the crimping surface.

[0011] As a further solution of the utility model: the fastener is formed by two half hoops rotatably connected at the bottom side, a pre-tightening block is arranged at the top of the half hoops, a fastening bolt is installed between the two pre-tightening blocks, and a fastening groove is arranged on the inner side of the half hoops.

[0012] As a further solution of the utility model: the inner side of the fastening groove is adapted and crimped with adjacent surfaces of the inner crimping ring and the outer crimping ring.

[0013] As a further solution of the utility model: a plurality of clamping blocks are evenly arranged along the outer circumferential direction at one end of the joint seat away from the replacement pipe, and a sealing groove 2 is arranged on the inner side, the adjacent ends of the oil delivery nozzle and the joint seat are adapted to each of the clamping blocks to be provided with a buckle, and a sealing groove 2 is also arranged on the inner side, and the sealing ring 2 is crimped between two adjacent sealing grooves 2.

[0014] Beneficial effects of the utility model:

[0015] 1. By installing a replacement pipe connected by fasteners on one side of the oil pipeline, and installing a joint seat on the other side of the replacement pipe with the help of fasteners, the oil nozzle is changed from being directly connected to the oil pipeline to being connected to the joint seat, and the connection mode of the oil nozzle is changed to a rotating crimping mode. When the oil nozzle fails during use, the problem of blockage that cannot be solved can be avoided by flexibly replacing the replacement pipe, joint seat and oil nozzle, thereby ensuring the stability of the pile self-balancing static load test;

[0016] 2. By arranging inner crimping rings on both sides of the replacement pipe, outer crimping rings are arranged on the oil pipe and the end face of the joint seat to match the inner crimping rings, and a sealing ring 1 is installed between the adjacent inner crimping rings and the outer crimping rings, a fastening groove is arranged in the fastener to crimp the inner and outer crimping rings and the sealing ring 1, and a sealing ring 2 is installed between the clamped joint seat and the oil nozzle. By sealing the connecting surfaces of the additional parts, the nozzle is ensured to have stability during use while improving the sealing ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings.

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

[0019] Figure 2 It is a partial exploded view of the utility model;

[0020] Figure 3 It is a partial half-section diagram of the utility model;

[0021] Figure 4 This utility model Figure 3 A magnified detail of point A in the middle.

[0022] In the figure: 1. oil pipeline; 2. replacement pipe; 3. fastener; 4. joint seat; 5. oil nozzle; 6. inner crimping ring; 7. outer crimping ring; 8. sealing groove 1; 9. sealing ring 1; 10. half hoop; 11. pre-tightening block; 12. fastening bolt; 13. fastening groove; 14. clamping block; 15. sealing groove 2; 16. buckle; 17. sealing ring 2. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0024] like Figures 1 to 4 As shown, a load box oil pipe joint includes an oil pipe 1, a replacement pipe 2 is installed on one side of the oil pipe 1, fasteners 3 are installed at both ends of the replacement pipe 2, a joint seat 4 is installed on the side of the replacement pipe 2 away from the oil pipe 1, one of the fasteners 3 is used to connect the oil pipe 1 and the replacement pipe 2, and the other fastener 3 is used to connect the replacement pipe 2 and the joint seat 4, an oil nozzle 5 is installed on the end of the joint seat 4 away from the fastener 3, and the replacement pipe 2 and the fastener 3 are both detachably connected.

[0025] like Figures 2 to 4As shown, the vertical installation cross-sectional structure of the fasteners 3 at both ends of the replacement pipe 2 is the same (see Figure 3 );

[0026] Internal crimping rings 6 are provided at both ends of the replacement pipe 2, and external crimping rings 7 are provided at the adjacent surfaces of the oil pipeline 1 and the joint seat 4 and the replacement pipe 2. The vertical cross-sections of the internal crimping ring 6 and the external crimping ring 7 are preferably table-shaped and symmetrical about the crimping surface. A sealing groove 8 is provided on the inner side of the internal crimping ring 6 and the external crimping ring 7. A sealing ring 9 is embedded between two adjacent internal crimping rings 6 and external crimping rings 7. Annular blocks are provided on both sides of the sealing ring 9 to adapt to the sealing groove 8, so that when it is crimped, it can completely seal the gap at the interface. Compared with the existing plate-shaped sealing ring, its sealing ability is better;

[0027] The fastener 3 is formed by two half hoops 10 rotating and connected at the bottom side, and a pre-tightening block 11 is arranged on the top of the two half hoops 10, and a fastening bolt 12 is installed between the two pre-tightening blocks 11, and a fastening groove 13 is arranged on the inner side of the half hoop 10. The vertical combined cross-section of the two sealing grooves 8 and the sealing ring 9 is the same as the vertical cross-section of the fastening groove 13, and the adjacent inner crimping ring 6 and outer crimping ring 7 together with the sealing ring 9 therebetween are crimped together through the fastening groove 13, that is, the oil pipeline 1 and the joint seat 4 are both connected to the replacement pipe 2 through the two fasteners 3. Specifically, when the fastening bolt 12 is rotated, the two half hoops 10 are crimped inwardly, and the fastening groove 13 transmits force to the inner crimping ring 6 and the outer crimping ring 7. Since the crimping surfaces are downward table-shaped surfaces that match each other, the pressure is transmitted from the side to the inner side of the sealing ring 9. By changing the direction of force conduction, the sealing ability is further improved, thereby adapting to the high-pressure use environment.

[0028] Four clamping blocks 14 are evenly arranged along the outer circumferential direction at one end of the joint seat 4 away from the replacement pipe 2, and a sealing groove 15 is arranged on the inner side. The adjacent ends of the oil nozzle 5 and the joint seat 4 are adapted to each clamping block 14 to be provided with a buckle 16, and a sealing groove 15 is also arranged on the inner side, and a sealing ring 17 is crimped between the two sealing grooves 15. When installing the joint seat 4 and the oil nozzle 5, the sealing ring 17 is first placed on the two sealing grooves 15, and each buckle 16 is located on one side of the clamping block 14. The sealing ring 17 is compacted by a simultaneous installation method of crimping and rotating, and each buckle 16 is buckled on the clamping block 14, so as to realize the sealed connection between the oil nozzle 5 and the joint seat 4; because the threaded connection is prone to jamming under high pressure, the installation method of the oil nozzle 5 is changed by a sealing buckling method to achieve the effect of reducing the failure rate.

[0029] It should be noted that the conventional connection method of the oil delivery nozzle 5 is to directly connect it with the oil delivery pipe 1. Under high-pressure use environment, when the oil delivery nozzle 5 is blocked, it is easy for the nozzle to be unable to be removed. At this time, the self-balancing static load test of the pile foundation needs to be stopped. By installing a replacement pipe 2 and a joint seat 4 between the oil delivery pipe 1 and the oil delivery nozzle 5, the direct connection between the oil delivery nozzle 5 and the oil delivery pipe 1 is avoided. When the replacement pipe 2 is blocked, the replacement pipe 2 can be replaced by removing the two fasteners 3. When blockage occurs at the nozzle 5, the oil nozzle 5 can be removed and replaced by rotating it. When the clamping block 14 and the buckle 16 at the oil nozzle 5 are stuck, the fastener 3 at the joint seat 4 can be removed to replace the joint seat 4 and the oil nozzle 5 as a whole, thereby improving the flexibility of dealing with various blockage situations and greatly reducing the probability of test suspension due to blockage; in addition, the use of two sealing rings allows the installed replacement pipe 2 and the joint seat 4 to maintain sealing ability during use, thereby improving the sealing performance under high oil pressure.

[0030] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A load box oil pipe joint, comprising an oil pipe (1), characterized in that: A replacement pipe (2) is installed on one side of the oil delivery pipe (1), and fasteners (3) are installed on both ends of the replacement pipe (2). A joint seat (4) is installed on the side of the replacement pipe (2) away from the oil delivery pipe (1), and an oil delivery nozzle (5) is installed on the end of the joint seat (4) away from the fastener (3). The replacement pipe (2), the fastener (3) and the joint seat (4) are all detachably connected; sealing rings (9) are installed on both sides of the replacement pipe (2), and sealing rings (17) are installed between the joint seat (4) and the oil delivery nozzle (5).

2. A load box oil pipe joint according to claim 1, characterized in that: Both ends of the replacement pipe (2) are provided with inner compression rings (6), and one end of the oil delivery pipe (1) and the joint seat (4) are provided with outer compression rings (7). The inner sides of the inner compression ring (6) and the outer compression ring (7) are provided with sealing grooves (8), and the sealing ring (9) is embedded between two adjacent sealing grooves (8). Both sides of the sealing ring (9) are provided with annular blocks adapted to the sealing grooves (8).

3. A load box oil pipe joint according to claim 2, characterized in that: The inner crimping ring (6) and the outer crimping ring (7) have a cone-shaped vertical cross section and are symmetrical about the crimping surface.

4. A load box oil pipe joint according to claim 2, characterized in that: The fastener (3) is formed by two half hoops (10) rotatably connected at the bottom side, a pre-tightening block (11) is arranged at the top of the half hoops (10), a fastening bolt (12) is installed between the two pre-tightening blocks (11), and a fastening groove (13) is arranged on the inner side of the half hoops (10).

5. A load box oil pipe joint according to claim 4, characterized in that: The inner side of the fastening groove (13) is adapted to be crimped with adjacent surfaces of the inner crimping ring (6) and the outer crimping ring (7).

6. A load box oil pipe joint according to claim 1, characterized in that: The end of the joint seat (4) away from the replacement pipe (2) is evenly provided with a plurality of clamping blocks (14) along the outer side, and a sealing groove (15) is provided inside. The adjacent ends of the oil delivery nozzle (5) and the joint seat (4) are adapted to each of the clamping blocks (14) and are provided with a buckle (16), and a sealing groove (15) is also provided inside. The sealing ring (17) is crimped between two adjacent sealing grooves (15).

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