Water hydraulic cylinder leakage detection test bench capable of simulating dynamic load impact

Abstract

A water hydraulic cylinder leakage detection test bench capable of simulating a dynamic load impact, comprising: a water hydraulic cylinder (7), wherein the water hydraulic cylinder (7) comprises a first water cavity (701) and a second water cavity (702), and a leakage detection device (16) is arranged in the first water cavity (701); a hydraulic water loop, wherein the hydraulic water loop is fixedly communicated with the second water cavity (702); a hydraulic cylinder (6), wherein the hydraulic cylinder (6) comprises a first oil cavity (601) and a second oil cavity (602), and a piston end of the hydraulic cylinder (6) is fixedly connected to a piston end of the water hydraulic cylinder (7); and a hydraulic oil loop, wherein the hydraulic oil loop is fixedly communicated with the first oil cavity (601) and the second oil cavity (602).

Description

A water hydraulic cylinder leakage detection test bench simulating dynamic load impact Technical Field

[0001] The invention belongs to the technical field of water hydraulics, and in particular relates to a water hydraulic cylinder leakage detection test bench simulating dynamic load impact. Background Art

[0002] Water hydraulics is an emerging technology that uses filtered freshwater or seawater instead of mineral oil as the working medium in hydraulic systems. This technology offers advantages such as energy conservation, combustion-free operation, and pollution-free operation, making it widely applicable in metallurgy, mining, food processing, and marine development.

[0003] However, despite years of application in certain fields, water hydraulics has received insufficient attention for research into its physical and chemical properties. Furthermore, current hydraulic valves and piping systems suffer from significant internal flow channel energy loss, high noise levels, low efficiency, high energy consumption, and short lifespans. These issues have, to a certain extent, limited the further development and application of water hydraulics.

[0004] Water hydraulic systems experiencing shock can cause a transient increase in fluid pressure. This phenomenon can damage components, piping, and instrumentation, and even disrupt normal system operation, affecting stability and reliability. Therefore, developing effective water shock detection technology is crucial to ensuring the safe operation of water hydraulic systems.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to provide a water hydraulic cylinder leakage detection test bench that simulates dynamic load impact to solve the above problems and achieve the purpose of detecting the leakage of the hydraulic cylinder of the water hydraulic system under dynamic load impact.

[0007] To achieve the above object, the present invention provides the following solution: a water hydraulic cylinder leakage detection test bench simulating dynamic load impact, comprising

[0008] A water hydraulic cylinder, comprising a first water chamber and a second water chamber, wherein a leakage detection device is provided in the first water chamber;

[0009] a hydraulic water circuit, the hydraulic water circuit being fixedly connected to the second water chamber;

[0010] A hydraulic cylinder comprising a first oil chamber and a second oil chamber, wherein a piston end of the hydraulic cylinder is fixedly connected to a piston end of the water hydraulic cylinder;

[0011] A hydraulic oil circuit is fixedly connected to the first oil chamber and the second oil chamber.

[0012] Preferably, the leakage detection device includes a fixing seat, which is fixedly connected to the end of the piston rod in the first water chamber by a number of bolts, and the outer wall of the fixing seat is circumferentially fixedly connected with an inner electrode plate, and the outer wall of the water hydraulic cylinder is circumferentially provided with an outer electrode plate, and the inner electrode plate corresponds to the outer electrode plate.

[0013] Preferably, the hydraulic oil circuit includes an oil cylinder, the oil outlet of the oil cylinder is fixedly connected to the inlet end of the oil pump, the outlet end of the oil pump is fixedly connected to the first end of the four-way reversing part, the second end of the four-way reversing part is fixedly connected to the oil cylinder, the third end of the four-way reversing part is fixedly connected to the second oil chamber through the energy storage part, the fourth end of the four-way reversing part is fixedly connected to the first oil chamber, one end of the oil return part is fixedly connected between the outlet end of the oil pump and the first end of the four-way reversing part, and the other end of the oil return part is fixedly connected to the oil cylinder.

[0014] Preferably, the four-way reversing part includes a three-position four-way reversing valve, and the three-position four-way reversing valve is provided with a lower left port, a lower right port, an upper left port, and an upper right port. The lower left port is fixedly connected to the oil pump outlet end, the lower right port is fixedly connected to the oil cylinder, the upper left port is fixedly connected to the energy storage part, the upper right port is fixedly connected to the first oil chamber, and the end of the oil return part is fixedly connected between the lower left port and the oil pump outlet end.

[0015] Preferably, the energy storage part includes an energy storage pipe, one end of the energy storage pipe is fixedly connected to the upper left port, the other end of the energy storage pipe is fixedly connected to the accumulator inlet, the accumulator outlet is fixedly connected to the second oil chamber, and a first pressure measuring instrument is provided between the accumulator outlet and the second oil chamber.

[0016] Preferably, the oil return portion includes an oil return pipe, one end of the oil return pipe is fixedly connected between the lower left port and the oil pump outlet end, and the other end of the oil return pipe is fixedly connected to the oil cylinder.

[0017] Preferably, the hydraulic water circuit includes a water cylinder, the outlet end of the water cylinder is fixedly connected to the inlet end of the high-pressure water pump, the outlet end of the high-pressure water pump is fixedly connected to one end of a one-way valve, the other end of the one-way valve is fixedly connected to the second water chamber, one end of a second overflow valve is fixedly connected between the outlet end of the high-pressure water pump and the one-way valve, and the other end of the second overflow valve is fixedly connected to the water cylinder.

[0018] Preferably, a second pressure measuring instrument is provided between the one-way valve and the second water chamber, one end of a stop valve is fixedly connected between the one-way valve and the second water chamber, and the other end of the stop valve is fixedly connected to the water cylinder.

[0019] Preferably, the piston end of the hydraulic cylinder is fixedly connected to the piston end of the water hydraulic cylinder through a sleeve.

[0020] Compared with the prior art, the present invention has the following advantages and technical effects:

[0021] This invention utilizes a hydraulic oil circuit to generate dynamic impacts and a leak detection device to detect leaks. This hydraulic oil circuit significantly simplifies conventional impact-generating hydraulic circuits. Filling the first and second oil chambers is accomplished through the hydraulic oil circuit. This design is more streamlined and simpler to operate than conventional hydraulic circuits, while still offering stable operation, fast response, ease of control, simple adjustment, and convenient operation, allowing for accurate and convenient adjustment of the impact magnitude. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work.

[0023] FIG1 is a system configuration diagram of the present invention;

[0024] FIG2 is a cross-sectional view of a water hydraulic cylinder according to the present invention;

[0025] FIG3 is a side view of the leakage detection device of the present invention;

[0026] FIG4 is an exploded view of the water hydraulic cylinder of the present invention;

[0027] FIG5 is an axonometric view of the connection between the hydraulic cylinder and the water hydraulic cylinder of the present invention;

[0028] FIG6 is a front view of the hydraulic cylinder and the water hydraulic cylinder of the present invention.

[0029] Among them, 1. oil pump; 2. first relief valve; 3. three-position four-way reversing valve; 301. lower left port; 302. lower right port; 303. upper left port; 304. upper right port; 4. accumulator; 5. first pressure measuring instrument; 6. hydraulic cylinder; 601. first oil chamber; 602. second oil chamber; 7. water hydraulic cylinder; 701. first water chamber; 702. second water chamber; 8. second pressure measuring instrument; 9. one-way valve; 10. second relief valve; 11. high-pressure water pump; 12. stop valve; 13. water cylinder; 14. oil cylinder; 15. sleeve; 16. leakage detection device; 1601. bolt; 1602. fixing seat; 1603. inner electrode plate; 1604. outer electrode plate; 17. energy storage pipe; 18. oil return pipe; 19. connecting seat. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] 1 to 6, the present invention provides a water hydraulic cylinder leakage detection test bench simulating dynamic load impact, comprising

[0033] The water hydraulic cylinder 7 includes a first water chamber 701 and a second water chamber 702 , wherein a leakage detection device 16 is provided in the first water chamber 701 ;

[0034] A hydraulic water circuit, the hydraulic water circuit is fixedly connected to the second water chamber 702;

[0035] Hydraulic cylinder 6, hydraulic cylinder 6 includes a first oil chamber 601 and a second oil chamber 602, and the piston end of hydraulic cylinder 6 is fixedly connected to the piston end of water hydraulic cylinder 7;

[0036] The hydraulic oil circuit is fixedly connected to the first oil chamber 601 and the second oil chamber 602 .

[0037] The bottom ends of the hydraulic cylinder 6 and the water hydraulic cylinder 7 are fixedly connected via a connecting seat 19 .

[0038] To further optimize the solution, the leakage detection device 16 includes a fixed seat 1602, which is fixedly connected to the end of the piston rod in the first water chamber 701 by a number of bolts 1601, and the outer wall of the fixed seat 1602 is circumferentially fixedly connected with an inner electrode plate 1603, and the outer wall of the water hydraulic cylinder 7 is circumferentially provided with an outer electrode plate 1604, and the inner electrode plate 1603 corresponds to the outer electrode plate 1604.

[0039] When there is a leak, the leaked water will pass through the gap between the inner electrode plate 1603 and the outer electrode plate 1604, causing a change in capacitance, which is then detected.

[0040] A further optimized solution is that the hydraulic oil circuit includes a cylinder 14, the oil outlet of the cylinder 14 is fixedly connected to the inlet end of the oil pump 1, the outlet end of the oil pump 1 is fixedly connected to the first end of the four-way reversing part, the second end of the four-way reversing part is fixedly connected to the cylinder 14, the third end of the four-way reversing part is fixedly connected to the second oil chamber 602 through the energy storage part, the fourth end of the four-way reversing part is fixedly connected to the first oil chamber 601, and one end of the oil return part is fixedly connected between the outlet end of the oil pump 1 and the first end of the four-way reversing part, and the other end of the oil return part is fixedly connected to the cylinder 14.

[0041] To further optimize the solution, the four-way reversing part includes a three-position four-way reversing valve 3, and the three-position four-way reversing valve 3 is provided with a lower left port 301, a lower right port 302, an upper left port 303, and an upper right port 304. The lower left port 301 is fixedly connected to the outlet end of the oil pump 1, the lower right port 302 is fixedly connected to the oil cylinder 14, the upper left port 303 is fixedly connected to the energy storage part, the upper right port 304 is fixedly connected to the first oil chamber 601, and the end of the oil return part is fixedly connected between the lower left port 301 and the outlet end of the oil pump 1.

[0042] To further optimize the solution, the energy storage part includes an energy storage pipe 17, one end of the energy storage pipe 17 is fixedly connected to the upper left port 303, the other end of the energy storage pipe 17 is fixedly connected to the inlet end of the accumulator 4, the outlet end of the accumulator 4 is fixedly connected to the second oil chamber 602, and a first pressure measuring instrument 5 is arranged between the outlet end of the accumulator 4 and the second oil chamber 602.

[0043] The hydraulic circuit is changed via the three-position, four-way directional valve 3, allowing the hydraulic cylinder 6 and accumulator 4 to charge and discharge energy. Using the accumulator 4 as the pressure power source provides rapid, stable, and high-flow oil, thus resolving the issue of conventional hydraulic pumps' pressure and flow rates not meeting test requirements and ensuring stability during the test.

[0044] To further optimize the solution, the oil return part includes an oil return pipe 18 , one end of the oil return pipe 18 is fixedly connected between the lower left port 301 and the outlet end of the oil pump 1 , and the other end of the oil return pipe 18 is fixedly connected to the oil cylinder 14 .

[0045] A further optimized solution is provided, in which the hydraulic water circuit includes a water cylinder 13, the outlet end of the water cylinder 13 is fixedly connected to the inlet end of the high-pressure water pump 11, the outlet end of the high-pressure water pump 11 is fixedly connected to one end of the one-way valve 9, the other end of the one-way valve 9 is fixedly connected to the second water chamber 702, one end of the second overflow valve 10 is fixedly connected between the outlet end of the high-pressure water pump 11 and the one-way valve 9, and the other end of the second overflow valve 10 is fixedly connected to the water cylinder 13.

[0046] The hydraulic oil circuit includes a pressurizing circuit for the first oil chamber 601, a pressurizing circuit for the accumulator 4, and a surge generating circuit. These circuits correspond to the right, center, and left positions of the three-position, four-way directional valve 3, respectively. The hydraulic water circuit includes a water hydraulic pressurizing circuit and a water hydraulic pressure relief circuit.

[0047] The first oil chamber 601 pressurizes the circuit: When the three-position, four-way directional control valve 3 is in the right position, the oil pump 1 provides power to pressurize the first oil chamber 601, causing the piston of the hydraulic cylinder 6 to move to the far left. The pressure in the circuit is maintained by the first relief valve 2.

[0048] Accumulator 4 pressurizing circuit: When the three-position four-way reversing valve 3 is in the middle position, the first oil chamber 601 maintains pressure and the oil pump 1 provides power to pressurize the accumulator 4. The pressure in the circuit is maintained by the first relief valve 2.

[0049] Impact generating circuit: When the three-position four-way reversing valve 3 is in the left position, the first oil chamber 601 no longer maintains pressure but is directly connected to the oil cylinder 14, which allows the oil to quickly flow back to the oil cylinder 14 to return the pressure of the first oil chamber 601 to zero; the second oil chamber 602 is connected to the accumulator 4 and still maintains high pressure, thereby generating an impact.

[0050] Water hydraulic stamping circuit: The high-pressure water pump 11 provides power to supply high-pressure liquid to the second water chamber 702, and the pressure in the circuit is maintained by the second overflow valve 10.

[0051] Water hydraulic pressure relief circuit: On the basis of the water hydraulic punching circuit, a stop valve 12 is added. When the test is completed, the stop valve 12 can be opened to allow the liquid to return to the water cylinder 13.

[0052] The first overflow valve 2 and the second overflow valve 10 are used to overflow after the high-pressure liquid is injected to protect the circuit.

[0053] To further optimize the solution, a second pressure measuring instrument 8 is provided between the one-way valve 9 and the second water chamber 702 , and one end of a stop valve 12 is fixedly connected between the one-way valve 9 and the second water chamber 702 , and the other end of the stop valve 12 is fixedly connected to the water cylinder 13 .

[0054] After the test is completed, the stop valve 12 allows the high-pressure water to flow back. The first pressure measuring instrument 5 and the second pressure measuring instrument 8 are used to detect pressure and determine whether charging is completed based on the pressure change.

[0055] According to a further optimized solution, the piston end of the hydraulic cylinder 6 is fixedly connected to the piston end of the water hydraulic cylinder 7 through a sleeve 15 .

[0056] The piston end of the hydraulic cylinder 6 is fixedly connected to the piston end of the water hydraulic cylinder 7 by interference fit through a sleeve 15. The interference fit connection can make the connection stable, ensure the transmission effect of the impact, and will not damage the piston end.

[0057] The working process of the present invention is as follows:

[0058] The first oil chamber 601 pressure circuit is used to position the three-position, four-way directional control valve 3 in the right position. The water hydraulic pressure circuit is also used. Oil pump 1 and high-pressure water pump 11 are turned on to inject high-pressure oil and water into the first oil chamber 601 and second water chamber 702, respectively. This causes the pistons of the connected hydraulic cylinder 6 and water hydraulic cylinder 7 to move leftward until they reach the far left. When the reading on the second pressure gauge 8 stabilizes, high-pressure water pump 11 is stopped. The accumulator 4 pressure circuit is used to move the three-position, four-way directional control valve 3 to the center position. At this point, oil is no longer injected into the first oil chamber 601, instead keeping it sealed. Oil pump 1 begins injecting high-pressure oil into the accumulator 4, and the pressure in the pipeline is monitored using the first pressure gauge 5. When the pressure displayed on the first pressure gauge 5 stabilizes, the impact generation circuit is used to move the three-position, four-way directional control valve 3 to the left position. At this time, the pipeline between the oil pump 1 and the accumulator 4 is cut off, and the high-pressure oil in the first oil chamber 601 flows into the oil cylinder 14 through the pipeline, while the accumulator 4 still provides high-pressure oil to the second oil chamber 602, causing the piston of the hydraulic cylinder 6 to impact.

[0059] This impact is transmitted to the right water hydraulic cylinder 7 via the connected piston rods. At this point, the first water chamber 701 within the water hydraulic cylinder 7 is empty, while the high-pressure water in the second water chamber 702 is impacted. If the capacitance between the inner electrode plate 1603 and the outer electrode plate 1604 changes, it indicates a water leak. If there is no change or a very small change, there is no leak.

[0060] After the test is completed, turn off the oil pump 1, open the stop valve 12 to allow the high-pressure water to flow back to the water cylinder 13, and move the three-position four-way reversing valve 3 to the right position to allow the high-pressure oil to flow back to the oil cylinder 14.

[0061] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0062] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A leakage detection test bench for a water hydraulic cylinder simulating dynamic load impact, characterized in that, including a water hydraulic cylinder (7), the water hydraulic cylinder (7) including a first water chamber (701) and a second water chamber (702), a leakage detection device (16) being arranged in the first water chamber (701); a hydraulic water circuit, the hydraulic water circuit being fixedly communicated with the second water chamber (702); a hydraulic cylinder (6), the hydraulic cylinder (6) including a first oil chamber (601) and a second oil chamber (602), the piston end of the hydraulic cylinder (6) being fixedly connected with the piston end of the water hydraulic cylinder (7); a hydraulic oil circuit, the hydraulic oil circuit being fixedly communicated with the first oil chamber (601) and the second oil chamber (602).

2. The leakage detection test bench for a water hydraulic cylinder simulating dynamic load impact according to claim 1, characterized in that, The leakage detection device (16) includes a fixing seat (1602), the fixing seat (1602) being fixedly connected with the end of the piston rod in the first water chamber (701) through a plurality of bolts (1601), an inner electrode plate (1603) being circumferentially and fixedly connected to the outer side wall of the fixing seat (1602), an outer electrode plate (1604) being circumferentially arranged on the outer side wall of the water hydraulic cylinder (7), and the inner electrode plate (1603) corresponding to the outer electrode plate (1604).

3. A leakage detection test bench for a water hydraulic cylinder simulating dynamic load impact according to claim 1, characterized in that, The hydraulic oil circuit includes an oil cylinder (14), an oil outlet of the oil cylinder (14) being fixedly communicated with an inlet end of an oil pump (1), an outlet end of the oil pump (1) being fixedly communicated with a first end of a four-way reversing part, a second end of the four-way reversing part being fixedly communicated with the oil cylinder (14), a third end of the four-way reversing part being fixedly communicated with the second oil chamber (602) through an energy storage part, a fourth end of the four-way reversing part being fixedly communicated with the first oil chamber (601), and one end of an oil return part being fixedly communicated between the outlet end of the oil pump (1) and the first end of the four-way reversing part, and the other end of the oil return part being fixedly communicated with the oil cylinder (14).

4. A leakage detection test bench for a water hydraulic cylinder simulating dynamic load impact according to claim 3, characterized in that, The four-way reversing part includes a three-position four-way reversing valve (3), the three-position four-way reversing valve (3) being provided with a lower left port (301), a lower right port (302), an upper left port (303), and an upper right port (304), the lower left port (301) being fixedly communicated with the outlet end of the oil pump (1), the lower right port (302) being fixedly communicated with the oil cylinder (14), the upper left port (303) being fixedly communicated with the energy storage part, the upper right port (304) being fixedly communicated with the first oil chamber (601), and the end of the oil return part being fixedly communicated between the lower left port (301) and the outlet end of the oil pump (1).

5. The leakage detection test bench for a water hydraulic cylinder simulating dynamic load impact according to claim 4, characterized in that, The energy storage part includes an energy storage pipeline (17), one end of the energy storage pipeline (17) being fixedly communicated with the upper left port (303), the other end of the energy storage pipeline (17) being fixedly communicated with an inlet end of an accumulator (4), an outlet end of the accumulator (4) being fixedly communicated with the second oil chamber (602), and a first pressure measuring instrument (5) being arranged between the outlet end of the accumulator (4) and the second oil chamber (602).

6. The leakage detection test bench for a water hydraulic cylinder simulating dynamic load impact according to claim 4, characterized in that The oil return part includes an oil return pipeline (18), one end of the oil return pipeline (18) is fixedly communicated between the lower left port (301) and the outlet end of the oil pump (1), and the other end of the oil return pipeline (18) is fixedly communicated with the oil cylinder (14).

7. A leakage detection test bench for a water hydraulic cylinder simulating dynamic load impact according to claim 1, characterized in that, The hydraulic water circuit includes a water cylinder (13), the outlet end of the water cylinder (13) is fixedly communicated with the inlet end of a high-pressure water pump (11), the outlet end of the high-pressure water pump (11) is fixedly communicated with one end of a check valve (9), the other end of the check valve (9) is fixedly communicated with the second water chamber (702), and one end of a second overflow valve (10) is fixedly communicated between the outlet end of the high-pressure water pump (11) and the check valve (9), and the other end of the second overflow valve (10) is fixedly communicated with the water cylinder (13).

8. A leakage detection test bench for a water hydraulic cylinder simulating dynamic load impact according to claim 7, characterized in that, A second pressure measuring instrument (8) is arranged between the check valve (9) and the second water chamber (702), and one end of a stop valve (12) is also fixedly communicated between the check valve (9) and the second water chamber (702), and the other end of the stop valve (12) is fixedly communicated with the water cylinder (13).

9. A leakage detection test bench for a water hydraulic cylinder simulating dynamic load impact according to claim 1, characterized in that, The piston end of the hydraulic cylinder (6) is fixedly connected with the piston end of the water hydraulic cylinder (7) through a sleeve (15).

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