High-pressure oil pipe fixing and pressing device
By installing a fixed pressure sleeve device with a reinforced connection at the oil inlet of the high-pressure oil pipe, the problems of uneven force and easy loosening of the high-pressure oil pipe during the pressurization process are solved, achieving efficient and safe pressurization effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAN COAL MINING MACHINERY
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-01
AI Technical Summary
High-pressure oil pipes pose safety hazards during pressurization due to uneven stress and easy loosening. Furthermore, their complex structure makes them difficult to fix, affecting both pressurization effectiveness and safety.
A high-pressure oil pipe fixing and pressurizing device is designed. A first fixing sleeve is set at the oil inlet and threadedly connected to the high-pressure oil pipe. The first and second fixing sleeves are fixed to the worktable to ensure uniform force at both ends. The oil injection hole with enlarged thread and thickened hole wall is used to enhance the connection strength.
This ensures that the high-pressure oil pipe is subjected to uniform force at both ends during the pressurization process, preventing loosening, ensuring safety and pressurization effect, and meeting the pressurization requirements.
Smart Images
Figure CN224189770U_ABST
Abstract
Description
A high-pressure oil pipe fixing and pressurizing device Technical Field
[0001] This utility model belongs to the technical field of pressure testing of internal parts of cutting speed reducers, and in particular relates to a high-pressure oil pipe fixing and pressurizing device. Background Technology
[0002] In the cutting mechanism of a roadheader, the cutting reducer, as a crucial component for power output, reduces high speed to low speed, thereby transmitting greater torque and ensuring the free extension and retraction of the cutting drum. Therefore, based on the structural requirements and pipeline characteristics of the cutting reducer, a pressure test is required on the internal welds of the high-pressure oil pipe to ensure power transmission and guarantee normal operation. During the pressure test, two main issues arise. First, due to the unique structure of the high-pressure oil pipe, it experiences significant pressure during operation (the standard pressure is 30 MPa). However, the M8×1 injection port of the high-pressure oil pipe is small, with a wall thickness of only 4 mm, resulting in a small stress surface. This combination of high pressure and a small stress surface poses a significant safety hazard during the pressure test. Second, the high-pressure oil pipe has a complex external structure, consisting of four welded components: two connectors on the left and right sides, a support pipe, and a central pipe, totaling eight welds. To ensure the reliability of the welds, minimal machining should be performed after completion to avoid changes in weld strength caused by machining. Care must be taken to consider the installation and fixation of the device, while also ensuring it conforms to the actual working configuration of the high-pressure oil pipe. Currently, due to the long length of the high-pressure oil pipe, it must be fixed during the pressure test. If a large vise is used to fix both ends of the high-pressure oil pipe, with one end clamped at the outer circumference, the uneven force on both ends can easily lead to loosening during the pressure test, posing a safety hazard. Therefore, a high-pressure oil pipe fixing and pressure testing device is proposed. Summary of the Invention
[0003] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing a high-pressure oil pipe fixing and pressurizing device. This device involves setting a first fixing sleeve at the oil inlet of the high-pressure oil pipe, with an oil injection hole within the first fixing sleeve connected to the high-pressure oil pipe. Compared to the original oil injection hole of the high-pressure oil pipe, the thread of the oil injection hole in the first fixing sleeve is enlarged and the hole wall is thickened, thereby strengthening the connection strength at the pressurizing joint and ensuring the pressurizing requirements are met. Furthermore, by using the first and second fixing sleeves to fix the high-pressure oil pipe on the workbench for pressurizing tests, it is ensured that both ends of the high-pressure oil pipe remain on the same horizontal plane after installation and that the force on both ends is uniform. This prevents loosening during pressurization, avoids safety hazards, and facilitates pressurization.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a high-pressure oil pipe fixing and pressurizing device, characterized in that: it includes a first fixing sleeve coaxially disposed at the oil inlet end of the high-pressure oil pipe and a second fixing sleeve coaxially disposed at the end of the high-pressure oil pipe away from the oil inlet; the first fixing sleeve is threadedly connected to the high-pressure oil pipe, and the second fixing sleeve is connected to the high-pressure oil pipe by fastening bolts; a manual pump connector is threadedly connected to the top of the first fixing sleeve, and the manual pump connector and the high-pressure oil pipe are connected through an oil injection hole;
[0005] The second fixed pressure sleeve includes an upper pressure sleeve and a lower pressure sleeve fitted on the end of the high-pressure oil pipe away from the oil inlet and mating with each other, and the upper pressure sleeve and the lower pressure sleeve are connected by fastening bolts.
[0006] The above-mentioned high-pressure oil pipe fixing and pressurizing device is characterized in that: the middle part of the first fixing sleeve is provided with a threaded section, a first mounting section and a second mounting section from left to right, and the central axis of the threaded section, the central axis of the first mounting section and the central axis of the second mounting section all coincide with the central axis of the high-pressure oil pipe; the first fixing sleeve is threadedly connected to the high-pressure oil pipe through the threaded section, and the first mounting section and the second mounting section are both clearance-fitted with the high-pressure oil pipe.
[0007] The above-mentioned high-pressure oil pipe fixing and pressurizing device is characterized in that: the top of the first fixing sleeve is provided with an installation hole for installing a manual pump connector, the bottom of the installation hole is connected to the top of the oil injection hole, and the first installation section is connected to the bottom of the oil injection hole.
[0008] The above-mentioned high-pressure oil pipe fixing and pressurizing device is characterized in that: the upper pressure sleeve includes a horizontal section fitted on the high-pressure oil pipe and a vertical section vertically arranged at the top of the horizontal section, the horizontal section and the vertical section are integrally formed, and the horizontal section and the vertical section form an inverted T-shaped structure; an upper sleeve groove that mates with the high-pressure oil pipe is opened in the middle of the horizontal section, and the upper sleeve groove is arranged on the side away from the vertical section; a plurality of through holes for installing the fastening bolts are also opened on the horizontal section, and the plurality of through holes are evenly arranged on both sides of the upper sleeve groove.
[0009] The above-mentioned high-pressure oil pipe fixing and pressurizing device is characterized in that: a lower sleeve groove that mates with the high-pressure oil pipe is provided on the top surface of the lower sleeve, and the lower sleeve groove is arranged in the middle of the lower sleeve; a plurality of connecting holes for mates with the through holes are also provided on the top surface of the lower sleeve, and the number of connecting holes is equal to the number of through holes and corresponds one-to-one.
[0010] The beneficial effects of this utility model are as follows: by setting a first fixed pressure sleeve at the oil inlet of the high-pressure oil pipe, the oil injection hole in the first fixed pressure sleeve is connected to the high-pressure oil pipe. Compared with the original oil injection hole of the high-pressure oil pipe, the thread of the oil injection hole in the first fixed pressure sleeve is enlarged and the hole wall is thickened, thereby strengthening the connection strength at the pressure testing joint and ensuring the pressure testing requirements. In addition, by using the first fixed pressure sleeve and the second fixed pressure sleeve to fix the high-pressure oil pipe on the workbench for pressure testing, it can be ensured that the two ends of the high-pressure oil pipe remain on the same horizontal plane after installation and the force on both ends is uniform. It is not easy to loosen during the pressure testing process, avoiding safety hazards and facilitating pressure testing.
[0011] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0012] Figure 1 is a schematic diagram of the structure of the first fixed pressure sleeve of this utility model.
[0013] Figure 2 is a schematic diagram of the upper pressure sleeve of this utility model.
[0014] Figure 3 is a top view of Figure 2.
[0015] Figure 4 is a schematic diagram of the structure of the lower pressure sleeve of this utility model.
[0016] Figure 5 is a top view of Figure 4.
[0017] Figure 6 shows the usage state of this utility model.
[0018] Explanation of reference numerals in the attached figures:
[0019] 1—High-pressure oil pipe; 2—Fastening bolt; 3—Manual pump connector;
[0020] 4—Oil injection hole; 5—Upper pressure sleeve; 6—Lower pressure sleeve;
[0021] 7—Horizontal section; 8—Vertical section; 9—Upper fitting slot;
[0022] 10—Through hole; 11—Lower fitting groove; 12—Connecting hole;
[0023] 13—Threaded section; 14—First mounting section; 15—Second mounting section;
[0024] 16—Mounting hole; 17—First fixing sleeve. Detailed Implementation
[0025] As shown in Figures 1 to 6, this utility model includes a first fixed sleeve 17 coaxially disposed at the oil inlet end of the high-pressure oil pipe 1 and a second fixed sleeve coaxially disposed at the end of the high-pressure oil pipe 1 away from the oil inlet. The first fixed sleeve 17 is threadedly connected to the high-pressure oil pipe 1, and the second fixed sleeve is connected to the high-pressure oil pipe 1 by a fastening bolt 2. A manual pump connector 3 is threadedly connected to the top of the first fixed sleeve 17, and the manual pump connector 3 and the high-pressure oil pipe 1 are connected through an oil injection hole 4.
[0026] The second fixed pressure sleeve includes an upper pressure sleeve 5 and a lower pressure sleeve 6 fitted onto the end of the high-pressure oil pipe 1 away from the oil inlet and mating with it. The upper pressure sleeve 5 and the lower pressure sleeve 6 are connected by a fastening bolt 2.
[0027] In actual use, a first fixed pressure sleeve 17 is installed at the oil inlet of the high-pressure oil pipe 1. The oil injection hole 4 inside the first fixed pressure sleeve 17 is connected to the high-pressure oil pipe 1. Compared with the original oil injection hole of the high-pressure oil pipe 1, the thread of the oil injection hole 4 inside the first fixed pressure sleeve 17 is enlarged and the hole wall is thickened, thereby strengthening the connection strength at the pressure testing joint and ensuring the pressure testing requirements. In addition, the high-pressure oil pipe 1 is fixed on the workbench by the first fixed pressure sleeve 17 and the second fixed pressure sleeve. This ensures that the two ends of the high-pressure oil pipe 1 are kept on the same horizontal plane after installation and that the force on both ends is uniform. It is not easy to loosen during the pressure testing process, avoiding safety hazards and facilitating pressure testing.
[0028] It should be noted that during the pressure test, the first fixed pressure sleeve 17 and the second fixed pressure sleeve can be fixed in place by the T-slot on the test bench to ensure that the parts do not loosen during the pressure test, thereby ensuring that the pressure test is carried out smoothly.
[0029] As shown in Figure 1, in this embodiment, the middle part of the first fixing sleeve 17 is provided with a threaded section 13, a first mounting section 14, and a second mounting section 15 from left to right. The central axis of the threaded section 13, the central axis of the first mounting section 14, and the central axis of the second mounting section 15 all coincide with the central axis of the high-pressure oil pipe 1. The first fixing sleeve 17 is threadedly connected to the high-pressure oil pipe 1 through the threaded section 13, and the first mounting section 14 and the second mounting section 15 are both clearance-fitted with the high-pressure oil pipe 1.
[0030] As shown in Figure 1, in this embodiment, the top of the first fixed pressure sleeve 17 is provided with an installation hole 16 for installing the manual pump connector 3. The bottom of the installation hole 16 is connected to the top of the oil injection hole 4, and the first installation section 14 is connected to the bottom of the oil injection hole 4.
[0031] In actual use, the manual pump connector 3 and the mounting hole 16 are threaded together, and the top of the manual pump connector 3 is connected to a manual pressure pump through a G1 / 4 pipe thread for pressure testing.
[0032] As shown in Figures 2 and 3, in this embodiment, the upper pressure sleeve 5 includes a horizontal section 7 fitted onto the high-pressure oil pipe 1 and a vertical section 8 vertically disposed at the top of the horizontal section 7. The horizontal section 7 and the vertical section 8 are integrally formed and form an inverted T-shaped structure. An upper fitting groove 9 that mates with the high-pressure oil pipe 1 is provided in the middle of the horizontal section 7. The upper fitting groove 9 is located on the side away from the vertical section 8. A plurality of through holes 10 for installing the fastening bolts 2 are also provided on the horizontal section 7. The plurality of through holes 10 are evenly distributed on both sides of the upper fitting groove 9.
[0033] In actual use, the upper pressure sleeve 5 is designed with an inverted T-shaped structure to reduce weight.
[0034] As shown in Figures 4 and 5, in this embodiment, the top surface of the lower pressure sleeve 6 is provided with a lower sleeve groove 11 that cooperates with the high-pressure oil pipe 1, and the lower sleeve groove 11 is arranged in the middle of the lower pressure sleeve 6; the top surface of the lower pressure sleeve 6 is also provided with a plurality of connecting holes 12 for cooperating with the through holes 10, and the number of connecting holes 12 is equal to the number of through holes 10 and corresponds one-to-one.
[0035] In actual use, the fastening bolts 2 are vertically inserted through the through holes 10 and the connecting holes 12 in sequence to connect the upper pressure sleeve 5 and the lower pressure sleeve 6, facilitating installation and disassembly. The upper pressure sleeve 5 and the lower pressure sleeve 6 are clearance-fitted with the outer circle of the high-pressure oil pipe 1. Dividing the second fixing sleeve into upper and lower parts and connecting them with the fastening bolts 2 is for convenient installation and disassembly during assembly.
[0036] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.
Claims
1. A high-pressure oil pipe fixing and pressurizing device, characterized in that: The system includes a first fixed sleeve (17) coaxially disposed at the oil inlet end of the high-pressure oil pipe (1) and a second fixed sleeve coaxially disposed at the end of the high-pressure oil pipe (1) away from the oil inlet. The first fixed sleeve (17) is threadedly connected to the high-pressure oil pipe (1), and the second fixed sleeve is connected to the high-pressure oil pipe (1) by a fastening bolt (2). A manual pump connector (3) is threadedly connected to the top of the first fixed sleeve (17), and the manual pump connector (3) and the high-pressure oil pipe (1) are connected by an oil injection hole (4). The second fixed sleeve includes an upper sleeve (5) and a lower sleeve (6) fitted on the end of the high-pressure oil pipe (1) away from the oil inlet and mating with each other. The upper sleeve (5) and the lower sleeve (6) are connected by a fastening bolt (2).
2. The high-pressure oil pipe fixing and pressurizing device according to claim 1, characterized in that: The first fixed pressure sleeve (17) has a threaded section (13), a first mounting section (14), and a second mounting section (15) sequentially opened from left to right in the middle. The central axis of the threaded section (13), the central axis of the first mounting section (14), and the central axis of the second mounting section (15) all coincide with the central axis of the high-pressure oil pipe (1). The first fixed pressure sleeve (17) is threadedly connected to the high-pressure oil pipe (1) through the threaded section (13), and the first mounting section (14) and the second mounting section (15) are both clearance-fitted with the high-pressure oil pipe (1).
3. The high-pressure oil pipe fixing and pressurizing device according to claim 2, characterized in that: The top of the first fixed pressure sleeve (17) is provided with an installation hole (16) for installing the manual pump connector (3). The bottom of the installation hole (16) is connected to the top of the oil injection hole (4), and the bottom of the first installation section (14) is connected to the bottom of the oil injection hole (4).
4. The high-pressure oil pipe fixing and pressurizing device according to claim 1, characterized in that: The upper pressure sleeve (5) includes a horizontal section (7) fitted onto the high-pressure oil pipe (1) and a vertical section (8) vertically arranged at the top of the horizontal section (7). The horizontal section (7) and the vertical section (8) are integrally formed and form an inverted T-shaped structure. The middle part of the horizontal section (7) is provided with an upper fitting groove (9) that cooperates with the high-pressure oil pipe (1). The upper fitting groove (9) is arranged on the side away from the vertical section (8). The horizontal section (7) is also provided with a plurality of through holes (10) for the installation of the fastening bolts (2). The plurality of through holes (10) are evenly arranged on both sides of the upper fitting groove (9).
5. The high-pressure oil pipe fixing and pressurizing device according to claim 4, characterized in that: The top surface of the lower pressure sleeve (6) is provided with a lower sleeve groove (11) that cooperates with the high pressure oil pipe (1), and the lower sleeve groove (11) is arranged in the middle of the lower pressure sleeve (6); the top surface of the lower pressure sleeve (6) is also provided with a plurality of connecting holes (12) for the through holes (10) to cooperate with, and the number of connecting holes (12) is equal to the number of through holes (10) and corresponds one to one.