Universal pressure measuring device for high-pressure oil pipe

Abstract

The utility model belongs to the technical field of high-pressure oil pipe detection, and discloses a universal pressure measuring device for high-pressure oil pipes, which comprises a testing support, a pressure measuring plate fixedly mounted on the testing support, a first clamping assembly detachably mounted on one side of the pressure measuring plate, and a first sealing assembly arranged in the middle of the first clamping assembly. A plurality of groups of first positioning assemblies are detachably installed at the positions, close to the first clamping assemblies, of the pressure measuring plate, a second sealing assembly is detachably installed at the other side of the pressure measuring plate, second clamping assemblies are symmetrically arranged on the two sides of the second sealing assembly, and second positioning assemblies are arranged between the first clamping assemblies and the second clamping assemblies; the first sealing assembly, the second clamping assembly and the second positioning assembly are detachably installed on the pressure measuring plate. The high-pressure oil pipe detection device is simple in overall structure, can detect high-pressure oil pipes of various models at a time, improves the detection efficiency and improves the use effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-pressure oil pipe detection, and specifically relates to a universal pressure measuring device for high-pressure oil pipes. Background Art

[0002] With the continuous development of industrial technology, high-pressure oil pipes are increasingly used in various mechanical equipment and systems, such as automobiles, construction machinery, ships, etc. These high-pressure oil pipes carry important hydraulic transmission tasks, so it is very important to accurately monitor their internal pressure. However, due to the large number of high-pressure oil pipe models, traditional pressure measuring devices are often only suitable for specific types of oil pipes, such as Figure 2 and Figure 3 The figure shows a bent first high-pressure oil pipe and a second high-pressure oil pipe with an inclination. When testing, corresponding testing equipment needs to be specially made according to the different shapes of the high-pressure oil pipes, which increases the testing cost and brings many inconveniences to practical applications.

[0003] In the existing technology, in order to measure the pressure in high-pressure oil pipes of different models, it is usually necessary to prepare a variety of pressure measuring devices of different specifications. This not only increases the cost of equipment procurement and maintenance, but also reduces the flexibility and efficiency of work. When it is necessary to switch to measure different types of oil pipes, the staff has to replace the corresponding pressure measuring device, which undoubtedly increases the complexity and time cost of the operation.

[0004] For example, the Chinese patent application number 202121917524.9 discloses a high-pressure oil pipe inspection platform, in which the left end of the high-pressure oil pipe is first fixed by a fixing component, and the turntable is rotated clockwise to drive the screw to rotate clockwise, and the rotation of the screw is supported by a support block, so that the screw block slides to the left in the slide groove of the slide seat, and vice versa, the screw block slides to the right in the slide groove of the slide seat, and then the right end of the high-pressure oil pipe is fixed by the same fixing component, so that the high-pressure oil pipe is straightened and fixed on the workbench, and then the high-pressure oil pipe is inspected by the detection component; thereby, the integrity of the entire high-pressure oil pipe is checked.

[0005] However, the high-pressure oil pipe detection platform is used to detect high-pressure oil pipes of different lengths, and additional detection devices are required for high-pressure oil pipes with different bending structures, which increases the detection cost. Utility Model Content

[0006] The main technical problem to be solved by the utility model is to provide a universal pressure measuring device for high-pressure oil pipes which has a simple overall structure and can detect various types of high-pressure oil pipes at one time, thereby improving the detection efficiency and the use effect.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0008] A universal pressure measuring device for high-pressure oil pipes comprises a test bracket, on which a pressure measuring plate is fixedly mounted, a first clamping assembly is detachably mounted at one side of the pressure measuring plate, a first sealing assembly is arranged at the middle of the first clamping assembly, a plurality of groups of first positioning assemblies are detachably mounted at positions close to the first clamping assembly on the pressure measuring plate, a second sealing assembly is detachably mounted at the other side of the pressure measuring plate, second clamping assemblies are symmetrically arranged on both sides of the second sealing assembly, a second positioning assembly is arranged between the first clamping assembly and the second clamping assembly, and the first sealing assembly, the second clamping assembly and the second positioning assembly are detachably mounted on the pressure measuring plate.

[0009] The following is a further optimization of the above technical solution by the utility model:

[0010] The pressure measuring plate is provided with a first waist hole, a second waist hole, a third waist hole and a fourth waist hole at positions corresponding to the first clamping assembly, the first positioning assembly, the second positioning assembly and the second clamping assembly respectively.

[0011] Further optimization: the first clamping assembly includes two L-shaped brackets detachably mounted on the first waist hole, which are symmetrical and spaced apart, and a hydraulic rotary clamping cylinder is fixedly mounted on one end face of the L-shaped bracket perpendicular to the pressure measuring plate.

[0012] Further optimization: the first sealing assembly includes a mounting bracket detachably mounted on the first waist hole, the mounting bracket is located between the two L-shaped brackets, and a positioning plate is fixedly mounted on one end face of the mounting bracket perpendicular to the pressure measuring plate.

[0013] Further optimization: a sealing groove is opened in the middle of the positioning plate, a sealing ring is movably placed in the sealing groove, an oil hole is opened in the middle of the sealing groove on the positioning plate, the oil hole runs through the positioning plate, and mutually symmetrical pins are respectively inserted at the positions on both sides of the sealing groove on the positioning plate.

[0014] Further optimization: the first positioning assembly includes a positioning bracket detachably mounted on the second waist hole, and an ejection hydraulic cylinder is vertically arranged on an end surface of the positioning bracket away from the first clamping assembly.

[0015] Further optimization: the power output end of the ejection hydraulic cylinder passes through the positioning bracket and is threadedly connected with a quick-change joint.

[0016] Further optimization: the quick-change connector includes a threaded rod threadedly connected to the power output end of the ejection hydraulic cylinder, a baffle threadedly connected to the surface of the threaded rod, a positioning rod fixedly connected to the other end of the threaded rod, and a locking nut threadedly connected to the other end of the positioning rod.

[0017] Further optimization: the outer surface of the positioning rod is sleeved with a sealing sleeve.

[0018] The utility model adopts the above technical scheme, has ingenious conception and reasonable structure, can perform high-pressure sealing detection on various types of high-pressure oil pipes, improves detection efficiency, is easy to operate, has a wide range of applications, is safe and reliable, is easy to operate, and has a simple overall structure, which is convenient to manufacture and produce, can reduce production and use costs, and improve economic benefits.

[0019] When the universal pressure measuring device for high-pressure oil pipes is used, one end of the first high-pressure oil pipe with a flange to be tested is mounted on the pin shaft of the first sealing assembly, the other end of the first high-pressure oil pipe is plugged into the sealing sleeve, the corresponding first manual valve is controlled, the hydraulic rotary clamping cylinder and the ejection hydraulic cylinder are started, the first high-pressure oil pipe is clamped and sealed, the corresponding second manual valve is controlled, the pressure test pump device is started to input the high-pressure hydraulic oil into the first hydraulic oil pipe through the pipeline and the oil hole for testing, and the operation is convenient.

[0020] While testing the first high-pressure oil pipe, the second high-pressure oil pipe is clamped and sealed on the second clamping assembly, the second sealing assembly and the first positioning assembly using the same installation method, the corresponding second manual valve is controlled, and the pressure test pump device is started to input high-pressure hydraulic oil into the second high-pressure oil pipe for testing, thereby improving the testing efficiency.

[0021] When it is necessary to detect different types of first high-pressure oil pipes and second high-pressure oil pipes, it is only necessary to adjust the positions of the first clamping assembly, the first sealing assembly, the second clamping assembly, the second sealing assembly and the first positioning assembly, the second positioning assembly on the corresponding first waist hole, the second waist hole, the third waist hole, and the fourth waist hole without replacing the equipment, thereby further improving the application scope of the device.

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure test installation in the embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the first high-pressure oil pipe in the embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the second high-pressure oil pipe in the embodiment of the utility model;

[0026] Figure 4 It is a schematic diagram of the overall structure in the embodiment of the utility model;

[0027] Figure 5 In the embodiment of the utility model Figure 4 A schematic diagram of the structure at A;

[0028] Figure 6In the embodiment of the utility model Figure 4 Schematic diagram of the structure at B;

[0029] Figure 7 It is a structural schematic diagram of a quick-change connector in an embodiment of the utility model.

[0030] In the figure: 1-test bracket; 11-hydraulic box; 12-pressure test pump device; 2-pressure measuring plate; 21-first waist hole; 22-second waist hole; 23-third waist hole; 24-fourth waist hole; 3-first clamping assembly; 31-L-shaped bracket; 32-hydraulic rotary clamping cylinder; 4-first sealing assembly; 41-mounting bracket; 42-positioning plate; 43-oil hole; 44-sealing groove; 45-sealing ring; 46-pin shaft; 5-first positioning assembly; 51-positioning bracket; 52-ejection hydraulic cylinder; 53-quick-change connector; 531-threaded rod; 532-baffle; 533-positioning rod; 534-locking nut; 54-sealing sleeve; 6-second positioning assembly; 7-second clamping assembly; 71-clamping cylinder; 8-second sealing assembly; 81-sealing plate; 91-first manual valve; 92-second manual valve. DETAILED DESCRIPTION

[0031] like Figure 4-7 As shown: a universal pressure measuring device for high-pressure oil pipes, including a test bracket 1, a pressure measuring plate 2 is fixedly installed on the test bracket 1, a first clamping assembly 3 is detachably installed at one side of the pressure measuring plate 2, a first sealing assembly 4 is arranged at the middle position of the first clamping assembly 3, a plurality of groups of first positioning assemblies 5 are detachably installed near the first clamping assembly 3 on the pressure measuring plate 2, a second sealing assembly 8 is detachably installed at the other side of the pressure measuring plate 2, second clamping assemblies 7 are symmetrically arranged on both sides of the second sealing assembly 8, a second positioning assembly 6 is arranged between the first clamping assembly 3 and the second clamping assembly 7, and the first sealing assembly 4, the second clamping assembly 7, and the second positioning assembly 6 are detachably installed on the pressure measuring plate 2.

[0032] like Figure 2-3 The figure shows two commonly used shapes of the first high-pressure oil pipe and the second high-pressure oil pipe. The mounting ends of the first high-pressure oil pipe and the second high-pressure oil pipe are both welded with flanges, and the flanges are fixedly connected to the application equipment.

[0033] When inspecting the first high-pressure fuel pipe and the second high-pressure fuel pipe, it is necessary to inspect whether all welding locations of the first high-pressure fuel pipe and the second high-pressure fuel pipe are sealed and to inspect the high-pressure resistance performance at the same time.

[0034] In this embodiment, the test bracket 1 is made by welding a plurality of square tubes of different lengths.

[0035] The test bracket 1 is fixedly provided with a bottom plate near the lower end.

[0036] A hydraulic box 11 is fixedly mounted on the bottom plate. The hydraulic box 11 includes hydraulic components such as a hydraulic pump, a motor, an oil tank, and a hydraulic valve. The function of the hydraulic box 11 is to provide a power source.

[0037] In the prior art, the working principle of the hydraulic box 11 is the same as that of a common hydraulic station. The connection method of the hydraulic components in the hydraulic box 11 is a well-known and widely used technology and will not be described in detail here.

[0038] The output end of the hydraulic box 11 is connected to a pressure test pump device 12 through a pipeline.

[0039] In this embodiment, the pressure test pump device 12 adopts a hydraulically driven electric pressure self-controlled pressure test pump device, which can stably provide high-pressure liquid to test the pressure bearing capacity of the parts to be tested, and record and output the test results.

[0040] In the prior art, the working principle of the pressure test pump device 12 is to achieve the suction and discharge of liquid through the reciprocating motion of the plunger or piston in the pump body.

[0041] The specific working principle of the pressure test pump device 12 is already known and widely used, and will not be described in detail here.

[0042] A fence is vertically arranged at the edge of the pressure measuring plate 2, and the function of the fence is to prevent the hydraulic oil leaking from the pressure measuring plate 2 from flowing into the surrounding environment and causing pollution to the surrounding environment.

[0043] A plurality of first manual valves 91 and second manual valves 92 arranged at intervals are fixedly mounted on the enclosure.

[0044] The input end of the first manual valve 91 is communicated with the output end of the hydraulic box 11 through a pipeline.

[0045] The input end of the second manual valve 92 is connected to the output end of the pressure test pump device 12 through a pipeline.

[0046] Two first waist holes 21 arranged in parallel and at intervals are provided on the pressure measuring plate 2 at positions corresponding to the first clamping assembly 3 and the first sealing assembly 4 .

[0047] Two second waist holes 22 arranged in parallel and at intervals are provided on the pressure measuring plate 2 at positions corresponding to the first positioning assembly 5 .

[0048] Two third waist holes 23 arranged in parallel and at intervals are provided at positions on the pressure measuring plate 2 corresponding to the second positioning assembly 6 .

[0049] Two fourth waist holes 24 arranged in parallel and at intervals are provided at positions on the pressure measuring plate 2 corresponding to the second clamping assembly 7 and the second sealing assembly 8 .

[0050] The first waist hole 21 and the third waist hole 23 are parallel to each other.

[0051] The second waist hole 22 and the fourth waist hole 24 are parallel to each other.

[0052] The first waist hole 21, the third waist hole 23 and the second waist hole 22, the fourth waist hole 24 are perpendicular to each other.

[0053] The first clamping assembly 3 includes two L-shaped brackets 31 detachably mounted on the first waist hole 21 and arranged symmetrically and at intervals.

[0054] The L-shaped bracket 31 is detachably mounted on the first waist hole 21 by bolts. When the position of the L-shaped bracket 31 needs to be changed, it is only necessary to loosen the fixing bolts to move the L-shaped bracket 31 on the first waist hole 21 to a suitable position for easy adjustment.

[0055] The L-shaped bracket 31 is fixedly mounted with a hydraulic rotary clamping cylinder 32 on one end surface of the vertical pressure measuring plate 2 .

[0056] In this embodiment, the principle of the hydraulic rotary clamping cylinder 32 is to control the pressure head at the power output end of the hydraulic rotary clamping cylinder 32 by hydraulic oil to perform rotational clamping. The specific working principle is well known in the prior art and will not be repeated here.

[0057] The control end of the hydraulic rotary clamping cylinder 32 is connected to the output end of the first manual valve 91 through a pipeline, that is, the first manual valve 91 controls the hydraulic box 11 to provide power to drive the power output end of the hydraulic rotary clamping cylinder 32 to rotate and clamp, which is convenient for operation.

[0058] like Figure 5 As shown, the first sealing assembly 4 includes a mounting bracket 41 detachably mounted on the first waist hole 21 .

[0059] The mounting bracket 41 is located between the two L-shaped brackets 31 .

[0060] The mounting bracket 41 is fixedly mounted with a positioning plate 42 on one end surface of the vertical pressure measuring plate 2 .

[0061] A sealing groove 44 is formed in the middle of the positioning plate 42 , and a sealing ring 45 is movably placed in the sealing groove 44 .

[0062] An oil hole 43 is formed on the positioning plate 42 at the middle of the sealing groove 44 , and the oil hole 43 penetrates the positioning plate 42 .

[0063] A pipe joint is fixedly connected to the oil hole 43 on the other end surface of the positioning plate 42 , and the pipe joint is connected to the output end of the second manual valve 92 through a pipeline.

[0064] The positioning plate 42 is provided with symmetrical pins 46 at both sides of the sealing groove 44 .

[0065] The outer diameter of the pin 46 matches the through hole size of the flange in the first high-pressure oil pipe.

[0066] like Figure 1 As shown, when in use, the flange through hole in the first high-pressure oil pipe is installed on the corresponding pin shaft 46. At this time, one side of the flange is in contact with the sealing ring 45, and the hydraulic rotary clamping cylinder 32 is started through the first manual valve 91. The pressure head at the power output end of the hydraulic rotary clamping cylinder 32 rotates and clamps the flange at the same time, completing the positioning of one end of the first high-pressure oil pipe.

[0067] like Figure 4 , 6 As shown in FIG. 7 , the first positioning assembly 5 includes a positioning bracket 51 detachably mounted on the second waist hole 22 .

[0068] An ejection hydraulic cylinder 52 is vertically arranged on an end surface of the positioning bracket 51 away from the first clamping assembly 3 .

[0069] In the prior art, the specific working principle of the ejection hydraulic cylinder 52 is a well-known and widely used technology, which will not be described in detail here.

[0070] The control end of the ejection hydraulic cylinder 52 is connected to the first manual valve 91 through a pipeline.

[0071] The power output end of the ejection hydraulic cylinder 52 passes through the positioning bracket 51 and is threadedly connected to a quick-change joint 53 .

[0072] The quick-change connector 53 includes a threaded rod 531 threadedly connected to the power output end of the ejection hydraulic cylinder 52 .

[0073] The surface of the threaded rod 531 is threadedly connected with a baffle 532 .

[0074] The other end of the threaded rod 531 is fixedly connected to a positioning rod 533 .

[0075] The other end of the positioning rod 533 is threadedly connected with a locking nut 534 .

[0076] The outer surface of the positioning rod 533 is sleeved with a sealing sleeve 54 .

[0077] In this embodiment, the sealing sleeve 54 is made of polyurethane, and the outer diameter of the sealing sleeve 54 matches the inner diameter of the first high-pressure oil pipe.

[0078] like Figure 1As shown, when in use, the end of the first high-pressure oil pipe away from the flange is plugged into the quick-change connector 53 to ensure that the inner wall of the first high-pressure oil pipe end is connected to the outer dome of the sealing sleeve 54, and the ejection hydraulic cylinder 52 is started through the first manual valve 91. The power output end of the ejection hydraulic cylinder 52 extends out to tighten the first high-pressure oil pipe. At the same time, the sealing sleeve 54 plays a sealing role to complete the positioning and sealing of the first high-pressure oil pipe.

[0079] Then, the pressure test pump device 12 is started through the second manual valve 92 to suck the hydraulic oil in the hydraulic box 11 and pressurize it to a preset pressure value, and then output it through the pipeline through the oil hole 43 to the inside of the first high-pressure oil pipe for testing.

[0080] When the model of the first high-pressure oil pipe is replaced, the positions of the first clamping assembly 3 and the first sealing assembly 4 on the first waist hole 21 are adjusted according to the lengths of the two ends of the first high-pressure oil pipe, and the position of the first positioning assembly 5 on the second waist hole 22 is adjusted to match the testing of first high-pressure oil pipes of different models.

[0081] When testing the first high-pressure oil pipe with different diameters, the locking nut 534 is removed, the sealing sleeve 54 is removed, and a matching sealing sleeve 54 is replaced. The installation is convenient and the application range is wide.

[0082] The second positioning assembly 6 is detachably mounted on the third waist hole 23 .

[0083] In this embodiment, the second positioning component 6 and the first positioning component 5 are configured to have the same structure. By adjusting the position of the second positioning component 6 on the third waist hole 23, when the second positioning component 6 and the first sealing component 4 are in the same working plane, the linear third high-pressure oil pipes of different lengths can be detected, which is not indicated in the figure.

[0084] The second clamping assembly 7 includes a clamping cylinder 71 detachably mounted on the fourth waist hole 24 . In this embodiment, the working principle of the clamping cylinder 71 is the same as that of the hydraulic rotary clamping cylinder 32 .

[0085] The control end of the clamping oil cylinder 71 is communicated with the output end of the first manual control valve 91 through a pipeline.

[0086] The clamping cylinder 71 is arranged perpendicular to the pressure measuring plate 2 .

[0087] The two clamping cylinders 71 are arranged at intervals on the fourth waist hole 24 .

[0088] The second sealing assembly 8 is located between two clamping cylinders 71 .

[0089] The second sealing assembly 8 includes a sealing plate 81 detachably mounted on the fourth waist hole 24 .

[0090] An annular sealing groove is provided in the middle of the sealing plate 81, an O-ring is movably placed in the annular sealing groove, a through hole is provided in the middle of the annular sealing groove, an oil pipe joint is fixedly installed at one end of the through hole, which is not indicated in the figure. The oil pipe joint is connected to the second manual valve 92 through a pipeline.

[0091] Positioning shafts are respectively inserted on both sides of the annular sealing groove on the sealing plate 81, and the size of the positioning shafts matches the size of the mounting holes on the flange of the second high-pressure oil pipe.

[0092] When in use, the flange of the second high-pressure oil pipe is installed on the positioning shaft, and the clamping cylinder 71 is started through the first manual valve 91. The power output end of the clamping cylinder 71 rotates the clamping flange. At this time, the end face of the second high-pressure oil pipe flange is in contact with the O-ring to achieve sealing.

[0093] The clamping and sealing principles of the second clamping assembly 7 and the second sealing assembly 8 are the same as those of the first clamping assembly 3 and the first sealing assembly 4, and will not be described in detail herein.

[0094] By adjusting the positions of the second clamping assembly 7 and the second sealing assembly 8 on the fourth waist hole 24 and the position of the first positioning assembly 5 on the second waist hole 22, different types of second high-pressure oil pipes can be tested.

[0095] In this embodiment, the high pressure detection principle of the second high pressure oil pipe is the same as that of the first high pressure oil pipe on the pressure measuring device, which will not be described in detail here.

[0096] By operating the first manual valve 91 and the second manual valve 92, various types of high-pressure oil pipes can be tested, thereby improving the testing efficiency.

[0097] For ordinary technicians in this field, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and deformations made to the implementation methods are still within the protection scope of the present invention.

Claims

1. A universal pressure measuring device for high-pressure oil pipes, comprising a test bracket (1), characterized in that: A pressure measuring plate (2) is fixedly mounted on the test bracket (1); a first clamping assembly (3) is detachably mounted on one side of the pressure measuring plate (2); a first sealing assembly (4) is arranged at a middle position of the first clamping assembly (3); a plurality of first positioning assemblies (5) are detachably mounted on the pressure measuring plate (2) near the first clamping assembly (3); a second sealing assembly (8) is detachably mounted on the other side of the pressure measuring plate (2); second clamping assemblies (7) are symmetrically arranged on both sides of the second sealing assembly (8); a second positioning assembly (6) is arranged between the first clamping assembly (3) and the second clamping assembly (7); and the first sealing assembly (4), the second clamping assembly (7) and the second positioning assembly (6) are detachably mounted on the pressure measuring plate (2).

2. A universal pressure measuring device for high-pressure oil pipes according to claim 1, characterized in that: The pressure measuring plate (2) is provided with a first waist hole (21), a second waist hole (22), a third waist hole (23), and a fourth waist hole (24) at positions corresponding to the first clamping assembly (3), the first positioning assembly (5), the second positioning assembly (6), and the second clamping assembly (7), respectively.

3. A universal pressure measuring device for high-pressure oil pipes according to claim 2, characterized in that: The first clamping assembly (3) comprises two L-shaped brackets (31) detachably mounted on the first waist hole (21) and arranged symmetrically and at intervals, and a hydraulic rotary clamping cylinder (32) is fixedly mounted on one end surface of the L-shaped bracket (31) perpendicular to the pressure measuring plate (2).

4. A universal pressure measuring device for high-pressure oil pipes according to claim 3, characterized in that: The first sealing assembly (4) comprises a mounting bracket (41) detachably mounted on the first waist hole (21), the mounting bracket (41) being located between the two L-shaped brackets (31), and a positioning plate (42) being fixedly mounted on one end surface of the mounting bracket (41) perpendicular to the pressure measuring plate (2).

5. A universal pressure measuring device for high-pressure oil pipes according to claim 4, characterized in that: A sealing groove (44) is provided in the middle of the positioning plate (42), a sealing ring (45) is movably placed in the sealing groove (44), an oil hole (43) is provided in the middle of the sealing groove (44) on the positioning plate (42), the oil hole (43) penetrates the positioning plate (42), and mutually symmetrical pins (46) are respectively inserted at positions on both sides of the sealing groove (44) on the positioning plate (42).

6. A universal pressure measuring device for high-pressure oil pipes according to claim 5, characterized in that: The first positioning assembly (5) comprises a positioning bracket (51) detachably mounted on the second waist hole (22), and an ejection hydraulic cylinder (52) is vertically arranged on an end surface of the positioning bracket (51) away from the first clamping assembly (3).

7. A universal pressure measuring device for high-pressure oil pipes according to claim 6, characterized in that: The power output end of the ejection hydraulic cylinder (52) passes through the positioning bracket (51) and is threadedly connected to a quick-change joint (53).

8. A universal pressure measuring device for high-pressure oil pipes according to claim 7, characterized in that: The quick-change joint (53) comprises a threaded rod (531) threadedly connected to the power output end of the ejection hydraulic cylinder (52); a baffle (532) is threadedly connected to the surface of the threaded rod (531); a positioning rod (533) is fixedly connected to the other end of the threaded rod (531); and a locking nut (534) is threadedly connected to the other end of the positioning rod (533).

9. A universal pressure measuring device for high-pressure oil pipes according to claim 8, characterized in that: The outer surface of the positioning rod (533) is sleeved with a sealing sleeve (54).

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