Hydraulic loading pressure testing device and method

Abstract

The invention belongs to the field of oil gas test equipment, and particularly relates to a hydraulic loading pressure test device. The device comprises a hydraulic part, a clamping part and a control part, the clamping part is constructed to be capable of responding to operation of the hydraulic part to clamp a workpiece to be detected, and the control part is constructed to be capable of controlling operation of the hydraulic part. The hydraulic part is further configured to apply pressure to the interior of the to-be-tested workpiece after the clamping part completes clamping of the to-be-tested workpiece so as to perform a pressure test on the to-be-tested workpiece. According to the invention, automatic pressure test can be carried out on the float collar and the float shoe, the test efficiency and the test accuracy are improved, the test difficulty is reduced, and better economical efficiency and wider applicability are achieved.

Description

Technical Field

[0001] The present invention belongs to the field of oil and gas test equipment, and particularly relates to a hydraulic loading pressure test device and method. Background Art

[0002] Float collars and float shoes play an important role in oil, gas, and other pipeline applications. To ensure their safety and reliability in high-pressure environments, pressure test is necessary. The existing pressure test devices for float collars and float shoes mainly achieve the test through manual operation. Such devices usually require manual adjustment of the pressure and flow rate of the hydraulic system to conduct pressure test on the float collar or float shoe. The advantage of this method is that it can be adjusted flexibly according to needs, but there are also the following defects: First, due to the need for manual operation, the work efficiency is low and it cannot meet the requirements of large-scale testing. Second, the skills and experience of the operator have a great influence on the test results, and human errors are prone to occur, affecting the accuracy and reliability of the test results. Third, the existing devices usually can only conduct pressure test on one float collar or float shoe, and cannot conduct pressure test on two or more float collars or float shoes simultaneously, resulting in low work efficiency. Summary of the Invention

[0003] In view of this, the present invention provides a hydraulic loading pressure test device and method to improve the automation level, test accuracy, and test efficiency of such pressure test devices.

[0004] According to the first aspect of the present invention, a hydraulic loading pressure test device is provided.

[0005] The hydraulic loading pressure test device includes:

[0006] A hydraulic part;

[0007] A clamping part configured to be able to clamp a workpiece to be tested in response to the operation of the hydraulic part;

[0008] A control part configured to be able to control the operation of the hydraulic part,

[0009] wherein the hydraulic part is further configured to be able to apply pressure to the inside of the workpiece to be tested to conduct pressure test on the workpiece to be tested after the clamping part completes the clamping of the workpiece to be tested.

[0010] As an expansion of the above technical solution, the present invention also provides the following embodiments:

[0011] The clamping part includes two horizontally clamping components arranged symmetrically. Each of the horizontally clamping components includes a horizontal base, a horizontal pressing plate, and a telescopic component connected between the horizontal base and the horizontal pressing plate. The hydraulic part includes a first hydraulic cylinder connected to the telescopic component and a hydraulic joint provided on the horizontal pressing plate. The first hydraulic cylinder is configured to drive the telescopic component to perform telescopic movement, and the hydraulic joint is configured to inject oil into the workpiece to be tested to perform a pressurizing operation on the workpiece to be tested.

[0012] The telescopic component includes a first lower leg, a second lower leg, a first upper leg, and a second upper leg. The first lower leg and the second lower leg are cross-hinged. The first upper leg and the second upper leg are cross-hinged. The upper end of the first lower leg is hinged to the lower end of the second upper leg. The upper end of the second lower leg is hinged to the lower end of the first upper leg. The lower end of the first lower leg is hinged to the horizontal base. The lower end of the second lower leg is slidably connected to the horizontal base. The upper ends of the first upper leg and the second upper leg are both fixedly connected to the horizontal pressing plate. A rotating member and a baffle are connected to the second upper leg. The rotating member is configured to be hinged to the second upper leg. The baffle is configured to be fixedly connected to the second upper leg and is located above the rotating member. The first hydraulic cylinder is configured to have its bottom connected to the horizontal base, and the first piston rod at the top is hinged to the upper end of the rotating member. The rotating member is further configured to rotate counterclockwise and clockwise respectively in response to the telescopic movement of the first piston rod until it is blocked by the baffle, and then drive the telescopic component to perform telescopic movement respectively.

[0013] A sealing ring configured to match the end face of the workpiece to be tested is installed on one side of the horizontal pressing plate opposite to the workpiece to be tested.

[0014] The clamping part includes a vertical clamping component. The vertical clamping component is configured to clamp the workpiece to be tested in a direction perpendicular to the clamping force provided by the horizontal clamping component. The vertical clamping component includes a vertical base and a vertical pressing plate. The hydraulic part includes a second hydraulic cylinder provided between the vertical base and the vertical pressing plate. The second hydraulic cylinder is configured to have its bottom connected to the vertical base and is connected to the vertical pressing plate through the second piston rod at the top. The vertical pressing plate is configured to be perpendicular to the second hydraulic cylinder.

[0015] The hydraulic part includes an oil tank, a gear pump assembly, a hydraulic joint reversing valve, a horizontal clamping assembly reversing valve, and a vertical clamping assembly reversing valve. The oil tank and the gear pump assembly are connected in series. The hydraulic joint reversing valve, the horizontal clamping assembly reversing valve, and the vertical clamping assembly reversing valve are all configured to be connected to the gear pump assembly. The hydraulic joint reversing valve is configured to be connected to both of the hydraulic joints. The horizontal clamping assembly reversing valve is configured to be connected to both of the first hydraulic cylinders. The vertical clamping assembly reversing valve is configured to be connected to the second hydraulic cylinder.

[0016] The hydraulic part includes a proportional overflow valve provided downstream of the gear pump assembly.

[0017] A first pressure sensor, a second pressure sensor, and a third pressure sensor are respectively provided downstream of the hydraulic joint reversing valve, the horizontal clamping assembly reversing valve, and the vertical clamping assembly reversing valve.

[0018] The control part includes a PLC controller configured to be able to automatically control the gear pump assembly, the hydraulic joint reversing valve, the horizontal clamping assembly reversing valve, and the vertical clamping assembly reversing valve.

[0019] It includes a test tabletop, and the clamping part is configured to be fixedly connected to the test tabletop.

[0020] The number of the clamping parts is not less than two.

[0021] According to the second aspect of the present invention, a hydraulic loading and pressure testing method is provided.

[0022] The hydraulic loading and pressure testing method is carried out by using the hydraulic loading and pressure testing device as described above, and includes the following steps:

[0023] S1. Control the hydraulic part to enable the clamping part to complete the clamping of the workpiece to be tested;

[0024] S2. Control the hydraulic part to inject oil into the workpiece to be tested for pressure testing.

[0025] Compared with the manual pressure testing device and method in the prior art, the hydraulic loading and pressure testing device provided by the present invention includes a hydraulic part, a clamping part, and a control part. The control part can realize the automatic control of the clamping part by controlling the hydraulic part, and the control part can also control the hydraulic part to perform a pressurizing operation on the workpiece to be tested for automatic pressure testing. This design improves the work efficiency and the accuracy of the test results, saves resources, and does not require the staff to have high skills and experience, reduces the operation difficulty, and improves the operation convenience due to the realization of the automatic control of the pressure testing. Description of the Drawings

[0026] Figure 1 It is a partial structural schematic diagram of the hydraulic loading and pressure testing device according to the present invention;

[0027] Figure 2 It is a structural schematic diagram of the clamping part of the hydraulic loading and pressure testing device according to the present invention;

[0028] Figure 3 It is a structural schematic diagram of the horizontal clamping assembly of the hydraulic loading and pressure testing device according to the present invention;

[0029] Figure 4 It is a partial structural schematic diagram of the horizontal clamping assembly of the hydraulic loading and pressure testing device according to the present invention;

[0030] Figure 5 It is a structural schematic diagram of the vertical clamping assembly of the hydraulic loading and pressure testing device according to the present invention.

[0031] All the drawings in the present invention are schematic diagrams for illustrating the structure and principle, and are not necessarily drawn according to the actual size and proportion.

[0032] The specific meanings of the reference numerals in the drawings are as follows:

[0033] 1. Hydraulic part; 11. First hydraulic cylinder; 111. First piston rod; 12. Hydraulic joint; 13. Second hydraulic cylinder; 14. Oil tank; 15. Gear pump assembly; 16. Hydraulic joint reversing valve; 161. First pressure sensor; 162. Third stop valve; 17. Horizontal clamping assembly reversing valve; 171. Second pressure sensor; 172. First stop valve; 18. Vertical clamping assembly reversing valve; 181. Second stop valve; 19. Proportional relief valve; 1a. Pressure reducing valve; 1b. Safety valve; 1c. Check valve; 1d. Filter; 2. Clamping part; 21. Horizontal clamping assembly; 211. Horizontal base; 212. Horizontal pressing plate; 213. Telescopic assembly; 2131. First lower leg; 2132. Second lower leg; 2133. First upper leg; 2134. Second upper leg; 2135. Rotating part; 2136. Baffle; 22. Vertical clamping assembly; 221. Vertical base; 222. Vertical pressing plate; 3. Control part; 31. PLC controller; 4. Workpiece to be tested; 5. Hydraulic pipeline; 6. Support block; 7. Test table; 100. Hydraulic loading and pressure testing device. Specific embodiments

[0034] The embodiments of the present invention will be described in more detail below with reference to the drawings.

[0035] According to the first aspect of the present invention, a hydraulic loading and pressure testing device 100 is provided.

[0036] Figure 1It is a partial structural schematic diagram of the hydraulic loading and pressure testing device 100 according to the present invention. Figure 2 It is a structural schematic diagram of the clamping part according to the present invention. As Figure 1 and Figure 2 shown, the hydraulic loading and pressure testing device 100 includes a hydraulic part 1, a clamping part 2 and a control part 3. The hydraulic part 1 serves as the power component of the hydraulic loading and pressure testing device 100, providing the hydraulic pressure required for the operation of the hydraulic loading and pressure testing device 100. The clamping part 2 is configured to be able to clamp the workpiece to be tested 4 in response to the operation of the hydraulic part 1. The control part 3 is configured to be able to control the operation of the hydraulic part 1. And the hydraulic part 1 is also configured to be able to apply pressure to the inside of the workpiece to be tested 4 to perform a pressure test on the workpiece to be tested 4 after the clamping part 2 completes the clamping of the workpiece to be tested 4. It should be noted that the workpiece to be tested 4 includes a float collar, a float shoe or a combination of the two, and other workpieces similar in structure to the float collar and the float shoe that need to be subjected to a pressure test.

[0037] During specific operation, the control part 3 controls the hydraulic part 1, and the hydraulic part 1 acts on the clamping part 2 to complete the clamping of the workpiece to be tested 4. Then, the control part 3 controls the hydraulic part 1 to apply the pressure required for the test to the inside of the workpiece to be tested 4 to perform a pressure test on the workpiece to be tested 4.

[0038] Through this design, by using the control part 3 and the control relationship between the control part 3 and the hydraulic part 1, the functions of automatically clamping and automatically performing a pressure test on the workpiece to be tested 4 are realized. Compared with the manual test technical solution in the prior art, the test efficiency and accuracy are improved, and the requirements for the skills and experience of the operator are reduced, having better economy and applicability.

[0039] As Figure 2 and Figure 3 shown, in some embodiments of the present invention, the clamping part 2 includes two horizontally clamping assemblies 21 arranged symmetrically. Each horizontal clamping assembly 21 includes a horizontal base 211, a horizontal pressing plate 212 and a telescopic assembly 213 connected between the horizontal base 211 and the horizontal pressing plate 212. The hydraulic part 1 includes a first hydraulic cylinder 11 connected to the telescopic assembly 213 and a hydraulic joint 12 opened on the horizontal pressing plate 212. The first hydraulic cylinder 11 is configured to be able to drive the telescopic assembly 213 to perform telescopic movement to complete the clamping of the workpiece to be tested 4. The hydraulic joint 12 is configured to be able to inject oil into the workpiece to be tested 4 to achieve the pressurization operation on the workpiece to be tested 4. Obviously, in order to achieve the purpose of clamping the workpiece to be tested 4, the two horizontal clamping assemblies 21 are configured to be symmetrically arranged in a manner that the horizontal pressing plates 212 face each other.

[0040] As Figure 3 and Figure 4As shown, in some embodiments of the present invention, the telescopic assembly 213 includes a first lower leg 2131, a second lower leg 2132, a first upper leg 2133, and a second upper leg 2134. The first lower leg 2131 and the second lower leg 2132 are cross-hinged, the first upper leg 2133 and the second upper leg 2134 are cross-hinged, the upper end of the first lower leg 2131 is hinged to the lower end of the second upper leg 2134, and the upper end of the second lower leg 2132 is hinged to the lower end of the first upper leg 2133. The lower end of the first lower leg 2131 is hinged to the horizontal base 211, the lower end of the second lower leg 2132 is slidably connected to the horizontal base 211, and the upper ends of both the first upper leg 2133 and the second upper leg 2134 are fixedly connected to the horizontal pressing plate 212. A rotating member 2135 and a baffle 2136 are connected to the second upper leg 2134. The rotating member 2135 is configured to be hinged to the second upper leg 2134, and the baffle 2136 is configured to be fixedly connected to the second upper leg 2134 and located above the rotating member 2135. The first hydraulic cylinder 11 is configured to be connected to the horizontal base 211 at the bottom, and the first piston rod 111 at the top is hinged to the upper end of the rotating member 2135. The rotating member 2135 is further configured to be able to rotate counterclockwise and clockwise respectively in response to the telescopic movement of the first piston rod 111 until it is blocked by the baffle 2136, and then drive the telescopic assembly 213 to perform telescopic movement. This design realizes the flexible telescopic function of the telescopic assembly 213 under the action of the first hydraulic cylinder 11, providing a structural basis for effectively clamping the workpiece 4 to be measured.

[0041] Preferably, in some embodiments of the present invention, the first lower leg 2131, the second lower leg 2132, the first upper leg 2133, and the second upper leg 2134 are all configured as rectangular frame structures with open upper ends.

[0042] Preferably, in order to improve the uniformity of the force on each leg and thus improve the service life of each leg, the first lower leg 2131 and the second lower leg 2132 are cross-hinged in the middle, and the first upper leg 2133 and the second upper leg 2134 are also cross-hinged in the middle.

[0043] In some embodiments not shown in the present invention, a sealing ring (not shown) configured to match the end face of the workpiece 4 to be measured is installed on the side of the horizontal pressing plate 212 opposite to the workpiece 4 to be measured to ensure the sealing performance of the workpiece 4 to be measured during the test and guarantee the smooth progress of the pressure test process.

[0044] Preferably, the sealing ring is made of rubber material.

[0045] As Figure 5As shown, in some embodiments of the present invention, the clamping portion 2 includes a vertical clamping assembly 22, and the vertical clamping assembly 22 is configured to be able to clamp the workpiece 4 to be measured in a direction perpendicular to the clamping force provided by the horizontal clamping assembly 21. The vertical clamping assembly 22 includes a vertical base 221 and a vertical pressing plate 222. The hydraulic portion 1 includes a second hydraulic cylinder 13 disposed between the vertical base 221 and the vertical pressing plate 222. The second hydraulic cylinder 13 is configured such that its bottom is connected to the vertical base 221 and is connected to the vertical pressing plate 222 through a second piston rod (not shown) at the top. The vertical pressing plate 222 is configured to be disposed perpendicular to the second hydraulic cylinder 13. During specific operations, the second hydraulic cylinder 13 drives the vertical pressing plate 222 to move up and down to achieve the clamping or releasing function of the workpiece 4 to be measured in the vertical direction.

[0046] As Figure 1 shown, in some embodiments of the present invention, the hydraulic portion 1 includes an oil tank 14, a gear pump assembly 15, a hydraulic joint reversing valve 16, a horizontal clamping assembly reversing valve 17, and a vertical clamping assembly reversing valve 18. The gear pump assembly 15 includes a gear pump and a servo motor, and the servo motor drives the gear pump to operate. The oil tank 14 and the gear pump assembly 15 are connected in series. The hydraulic joint reversing valve 16, the horizontal clamping assembly reversing valve 17, and the vertical clamping assembly reversing valve 18 are all configured to be connected to the gear pump assembly 15. The hydraulic joint reversing valve 16 is configured to be connected to both hydraulic joints 12 in one clamping portion 2. The horizontal clamping assembly reversing valve 18 is configured to be connected to both first hydraulic cylinders 11 in one clamping portion 2. The vertical clamping assembly reversing valve 16 is configured to be connected to the second hydraulic cylinder 13. During specific operations, the control portion 3 turns on the gear pump assembly 15, and the gear pump assembly 15 introduces the oil fluid in the oil tank 14 into the downstream components. The hydraulic joint reversing valve 16, the horizontal clamping assembly reversing valve 17, and the vertical clamping assembly reversing valve 18 can respectively control the direction of the oil fluid flowing into the workpiece 4 to be measured, the first hydraulic cylinders 11, and the second hydraulic cylinder 13 in response to the instructions of the control portion 3 and perform a pressure holding operation when the oil fluid pressure reaches the set value, thereby realizing the pressurization of the workpiece 4 to be measured and the clamping and releasing actions of the horizontal clamping assembly 21 and the vertical clamping assembly 22, and further ensuring the smooth operation of the automatic control process of the hydraulic loading and pressure testing device 100.

[0047] As Figure 1 shown, in some embodiments of the present invention, the hydraulic portion 1 includes a proportional relief valve 19 disposed downstream of the gear pump assembly 15. The proportional relief valve 19 is configured to be able to adjust the internal pressure of the hydraulic pipeline 5 in response to the instructions of the control portion 3, so as to provide a certain range of pressure for the workpiece 4 to be measured and smoothly perform a pressure test on the workpiece 4 to be measured.

[0048] As Figure 1As shown, in some embodiments of the present invention, a first pressure sensor 161, a second pressure sensor 171, and a third pressure sensor (not shown) are respectively provided on the hydraulic pipeline 5 downstream of the hydraulic joint reversing valve 16, the horizontal clamping assembly reversing valve 17, and the vertical clamping assembly reversing valve 18. The first pressure sensor 161, the second pressure sensor 171, and the third pressure sensor are configured to be able to measure the pressure inside the workpiece 4 to be measured, inside the first hydraulic cylinder 11, and inside the second hydraulic cylinder 13 respectively, and feedback it to the control unit 3, so that the control unit 3 can adjust the proportional relief valve 19 according to the actual pressure situation to obtain the required actual test pressure value, or complete the clamping or loosening action with a more appropriate force.

[0049] As Figure 1 shown, in some embodiments of the present invention, a third stop valve 162, a first stop valve 172, and a second stop valve 181 are respectively provided on the hydraulic pipeline 5 between the hydraulic joint reversing valve 16 and the hydraulic joint 12, between the horizontal clamping assembly reversing valve 17 and the first hydraulic cylinder 11, and between the vertical clamping assembly reversing valve 18 and the second hydraulic cylinder 13. Through this design, it enables the staff to control the oil supply by controlling the third stop valve 162, the first stop valve 172, and the second stop valve 181 according to the test requirements, so that in special cases, such as during maintenance, the hydraulic joint 12, the first hydraulic cylinder 11, and the second hydraulic cylinder 13 can be replaced separately without affecting other components, improving the controllability of the hydraulic loading and pressure testing device 100 and the convenience of maintenance.

[0050] As Figure 1 shown, in some embodiments of the present invention, in order to prevent the proportional relief valve 19 from being unable to output within a certain numerical range due to reasons such as friction and elastic deformation during pressure adjustment, resulting in a dead zone, a pressure reducing valve 1a is provided on the hydraulic pipeline 5 downstream of the proportional relief valve 19. The pressure reducing valve 1a stabilizes the system pressure in advance, enables the proportional relief valve 19 to work in a higher sensitivity range, and indirectly expands its effective adjustment range, thereby avoiding or weakening the influence of the dead zone.

[0051] Furthermore, in some embodiments of the present invention, in order to ensure timely pressure relief when the pressure of the hydraulic unit 1 abnormally increases and ensure the safety of the hydraulic loading and pressure testing device 100, a safety valve 1b is provided on the hydraulic pipeline 5 between the proportional relief valve 19 and the pressure reducing valve 1a.

[0052] As Figure 1As shown, in some embodiments of the present invention, in order to prevent the reverse flow of oil from impacting the gear pump assembly 15 and improve the service life of the gear pump assembly 15, a check valve 1c is provided on the hydraulic pipeline 5 downstream of the gear pump assembly 15 and upstream of the proportional overflow valve 19. Obviously, the check valve 1c is configured to allow only the oil in the hydraulic pipeline 5 to flow in the direction from the gear pump assembly 15 to the proportional overflow valve 19, and does not allow the oil to flow in the reverse direction.

[0053] As Figure 1 shown, in some embodiments of the present invention, a filter 1d is provided on the hydraulic pipeline 5 between the fuel tank 14 and the gear pump assembly 15. The function of the filter 1d is to filter the oil to prevent impurities in the oil from flowing into subsequent components, and improve the safety and stability of the hydraulic loading and pressure testing device 100 during transportation.

[0054] As Figure 1 shown, in some embodiments of the present invention, the control unit 3 includes a PLC controller 31, and the PLC controller 31 is configured to be able to automatically control the gear pump assembly 15, the hydraulic joint reversing valve 16, the horizontal clamping assembly reversing valve 17, and the vertical clamping assembly reversing valve 18.

[0055] Preferably, the PLC controller 31 is configured to be able to automatically control the proportional overflow valve 19.

[0056] Preferably, the PLC controller 31 is configured to be able to control the pressure reducing valve 1a and the safety valve 1b.

[0057] As Figure 2 shown, in some embodiments of the present invention, the hydraulic loading and pressure testing device 100 includes a test table 7, and the clamping part 2 is configured to be fixedly connected to the test table 7.

[0058] Preferably, the horizontal clamping assembly 21 is configured to be arranged parallel to the test table 7, and the vertical clamping assembly 22 is configured to be vertically placed on the test table 7.

[0059] As Figure 2 shown, in some embodiments of the present invention, the hydraulic loading and pressure testing device 100 includes a support block 6 provided on the test table 23. The function of the support block 6 is to carry the workpiece to be tested 4, lift the workpiece to be tested 4 to a suitable height for clamping, and play an auxiliary fixing role for the workpiece to be tested 4.

[0060] In some embodiments of the present invention, the number of clamping portions 2 is not less than two, and the hydraulic portion 1 is configured to provide hydraulic pressure for the clamping actions of all the clamping portions 2 and the pressure test. Through this design, the hydraulic loading pressure test device 100 can perform pressure tests on more than two workpieces to be tested 4 simultaneously, further improving the efficiency of the pressure test. And because it is a simultaneous test, the error caused by equipment adjustment is reduced, further improving the accuracy and reliability of the test results.

[0061] Preferably, the number of clamping portions 2 in the hydraulic loading pressure test device 100 is two, and the hydraulic portion 1 includes four hydraulic joints 12, four first hydraulic cylinders 11, and two second hydraulic cylinders 13. The four hydraulic joints 12 are all configured to be connected to the hydraulic joint reversing valve 16 to receive the control of the hydraulic joint reversing valve 16. The four first hydraulic cylinders 11 are all configured to be connected to the horizontal clamping assembly reversing valve 17 to receive the control of the horizontal clamping assembly reversing valve 17. The two second hydraulic cylinders 13 are all configured to be connected to the vertical clamping assembly reversing valve 18 to receive the control of the vertical clamping assembly reversing valve 18.

[0062] According to the hydraulic loading pressure test device 100 of the present invention, through the design of the hydraulic portion 1, the clamping portion 2, and the control portion 3 and the setting of the connection control relationship between the above components, the automatic pressure test detection of workpieces to be tested such as float collars and float shoes and the simultaneous test of multiple workpieces are realized. Thanks to the automatic control ability of the control portion 3 and the precise adjustment of the oil flow rate, the working efficiency and accuracy of the pressure test are improved, the requirements for the ability and experience of the staff in the pressure test are reduced, the operation process is simplified, and it has better economy and applicability.

[0063] According to the second aspect of the present invention, a hydraulic loading pressure test method is provided.

[0064] The hydraulic loading pressure test method is carried out by using the hydraulic loading pressure test device 100 as described above, and includes the following steps:

[0065] S1. Control the hydraulic portion 1 to make the clamping portion 2 complete the clamping of the workpiece to be tested 4;

[0066] S2. Control the hydraulic portion 1 to inject oil into the workpiece to be tested 4 for a pressure test.

[0067] The hydraulic loading pressure test method according to the present invention can achieve the technical effects that the hydraulic loading pressure test device 100 according to the present invention can achieve, and will not be elaborated here.

[0068] In the present invention, the specific meanings of "upper", "lower", "left", "right", "inner", "outer", "middle", "edge", etc. when expressing orientation terms are based on Figure 3 the drawing state of the horizontal clamping assembly 21.

[0069] Finally, it should be noted that although the present invention has been described in detail with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A hydraulic loading and pressure testing device, comprising: a hydraulic part (1); a clamping part (2) configured to be able to clamp a workpiece under test (4) in response to the operation of the hydraulic part (1); a control part (3) configured to be able to control the operation of the hydraulic part (1), wherein the hydraulic part (1) is further configured to be able to apply pressure to the inside of the workpiece under test (4) to perform a pressure test on the workpiece under test (4) after the clamping part (2) has completed clamping of the workpiece under test (4).

2. The hydraulic loading and pressure testing device according to claim 1, wherein: The clamping part (2) includes two symmetrically arranged horizontal clamping assemblies (21). Each horizontal clamping assembly (21) includes a horizontal base (211), a horizontal pressing plate (212), and a telescopic assembly (213) connected between the horizontal base (211) and the horizontal pressing plate (212). The hydraulic part (1) includes a first hydraulic cylinder (11) connected to the telescopic assembly (213) and a hydraulic joint (12) provided on the horizontal pressing plate (212). The first hydraulic cylinder (11) is configured to be able to drive the telescopic assembly (213) to perform a telescopic movement, and the hydraulic joint (12) is configured to be able to inject oil into the workpiece under test (4) to achieve a pressurizing operation on the workpiece under test (4).

3. The hydraulic loading and pressure testing device according to claim 2, wherein: The telescopic assembly (213) includes a first lower leg (2131), a second lower leg (2132), a first upper leg (2133) and a second upper leg (2134). The first lower leg (2131) and the second lower leg (2132) are cross-hinged. The first upper leg (2133) and the second upper leg (2134) are cross-hinged. The upper end of the first lower leg (2131) is hinged to the lower end of the second upper leg (2134). The upper end of the second lower leg (2132) is hinged to the lower end of the first upper leg (2133). The lower end of the first lower leg (2131) is hinged to the horizontal base (211). The lower end of the second lower leg (2132) is slidably connected to the horizontal base (211). The upper ends of the first upper leg (2133) and the second upper leg (2134) are both fixedly connected to the horizontal pressing plate (212). A rotating member (2135) and a baffle (2136) are connected to the second upper leg (2134). The rotating member (2136) is configured to be hinged to the second upper leg (2134). The baffle (2136) is configured to be fixedly connected to the second upper leg (2134) and is located above the rotating member (2135). The first hydraulic cylinder (11) is configured to have its bottom connected to the horizontal base (211), and the first piston rod (111) at the top is hinged to the upper end of the rotating member (2135). The rotating member (2135) is also configured to be able to rotate counterclockwise and clockwise respectively in response to the telescopic movement of the first piston rod (111), and until it is blocked by the baffle (2136), it drives the telescopic assembly (213) to perform telescopic movement respectively.

4. The hydraulic loading and pressure testing device according to claim 3, characterized in that: On one side of the horizontal pressing plate (212) opposite to the workpiece to be measured (4), a sealing ring configured to match the end face of the workpiece to be measured (4) is installed.

5. The hydraulic loading and pressure testing device according to claim 4, wherein: The clamping portion (2) includes a vertical clamping assembly (22). The vertical clamping assembly (22) is configured to be able to clamp the workpiece to be measured (4) in a direction perpendicular to the clamping force provided by the horizontal clamping assembly (21). The vertical clamping assembly (22) includes a vertical base (221) and a vertical pressing plate (222). The hydraulic portion (1) includes a second hydraulic cylinder (13) disposed between the vertical base (221) and the vertical pressing plate (222). The second hydraulic cylinder (13) is configured to have its bottom connected to the vertical base (221) and is connected to the vertical pressing plate (222) through the second piston rod at the top. The vertical pressing plate (222) is configured to be vertically arranged with respect to the second hydraulic cylinder (13).

6. The hydraulic loading and pressure testing device according to claim 5, characterized in that: The hydraulic part (1) includes an oil tank (14), a gear pump assembly (15), a hydraulic joint reversing valve (16), a horizontal clamping assembly reversing valve (17), and a vertical clamping assembly reversing valve (18). The oil tank (14) and the gear pump assembly (15) are connected in series. The hydraulic joint reversing valve (16), the horizontal clamping assembly reversing valve (17), and the vertical clamping assembly reversing valve (18) are all configured to be connected to the gear pump assembly (15). The hydraulic joint reversing valve (16) is configured to be connected to both of the hydraulic joints (12). The horizontal clamping assembly reversing valve (17) is configured to be connected to both of the first hydraulic cylinders (11). The vertical clamping assembly reversing valve (18) is configured to be connected to the second hydraulic cylinder (13).

7. The hydraulic loading and pressure testing device according to claim 6, wherein: The hydraulic part (1) includes a proportional overflow valve (19) provided downstream of the gear pump assembly (15).

8. The hydraulic loading and pressure testing device according to claim 7, wherein: A first pressure sensor (161), a second pressure sensor (171), and a third pressure sensor are respectively provided downstream of the hydraulic joint reversing valve (16), the horizontal clamping assembly reversing valve (17), and the vertical clamping assembly reversing valve (18).

9. The hydraulic loading and pressure testing device according to claim 8, characterized in that: The control part (3) includes a PLC controller (31), and the PLC controller (31) is configured to be able to automatically control the gear pump assembly (15), the hydraulic joint reversing valve (16), the horizontal clamping assembly reversing valve (17), and the vertical clamping assembly reversing valve (18).

10. The hydraulic loading and pressure testing device according to any one of claims 1 to 9, characterized in that: It includes a test tabletop (7), and the clamping part (2) is configured to be fixedly connected to the test tabletop (7).

11. The hydraulic loading and pressure testing device according to claim 10, wherein: The number of the clamping parts (2) is not less than two.

12. A hydraulic loading and pressure testing method, which is carried out by using the hydraulic loading and pressure testing device according to any one of claims 1 to 11, and includes the following steps: S1. Control the hydraulic part (1) to enable the clamping part (2) to complete the clamping of the workpiece to be tested (4). S2. Control the hydraulic part (1) to inject oil into the workpiece to be tested (4) for pressure testing.

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