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

Abstract

The present invention belongs to the field of water hydraulic technology, and in particular, relates to a water hydraulic cylinder leakage detection test bench simulating dynamic load impact, comprising a water hydraulic cylinder, the water hydraulic cylinder comprising a first water chamber and a second water chamber, a leakage detection device being arranged in the first water chamber; a hydraulic water circuit, the hydraulic water circuit being fixedly connected to the second water chamber; a hydraulic cylinder, the hydraulic cylinder comprising a first oil chamber and a second oil chamber, the piston end of the hydraulic cylinder being fixedly connected to the piston end of the water hydraulic cylinder; and a hydraulic oil circuit, the hydraulic oil circuit being fixedly connected to the first oil chamber and the second oil chamber. The present invention utilizes the dynamic load impact simulated by the hydraulic system to be more in line with the actual working conditions, and uses the change of the detection capacitor to detect whether there is leakage under the dynamic load impact, with high accuracy, simple operation, little environmental interference, and a wide range of applications.

Description

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 hydraulic technology is an emerging technology, which is characterized by using filtered fresh water or seawater instead of mineral oil as the working medium of the hydraulic system. This technology has the advantages of energy saving, no combustion, no pollution, etc., so it can be widely used in metallurgy, mining, food machinery, marine development and other fields.

[0003] However, although water hydraulic technology has been applied in some fields for many years, its related physical and chemical properties have not received sufficient attention. In addition, the current hydraulic valve and pipeline systems have problems such as large internal flow channel energy loss, high noise, low efficiency, high energy consumption, and short life. These problems have limited the further development and application of water hydraulic technology to a certain extent.

[0004] When a water hydraulic system encounters a shock, the liquid pressure will increase instantly. This phenomenon may damage the components, pipes, instruments, etc. in the system, and even interfere with the normal operation of the system, affecting its stability and reliability. Therefore, the development of effective water shock detection technology is crucial to ensure the safe operation of the water hydraulic system. Summary of the invention

[0005] The purpose of the present invention is to provide a water hydraulic cylinder leakage detection test bench simulating dynamic load impact, so as to solve the above-mentioned problem and achieve the purpose of detecting the leakage of the hydraulic cylinder of the water hydraulic system under dynamic load impact.

[0006] 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:

[0007] A water hydraulic cylinder, the water hydraulic cylinder comprising a first water chamber and a second water chamber, wherein a leakage detection device is arranged in the first water chamber;

[0008] a hydraulic water circuit, the hydraulic water circuit being fixedly connected to the second water chamber;

[0009] A hydraulic cylinder, the hydraulic cylinder comprising a first oil chamber and a second oil chamber, the piston end of the hydraulic cylinder being fixedly connected to the piston end of the water hydraulic cylinder;

[0010] A hydraulic oil circuit is fixedly connected to the first oil chamber and the second oil chamber.

[0011] Preferably, the leakage detection device includes a fixed seat, which is fixedly connected to the end of the piston rod in the first water chamber by a plurality of bolts, and the outer wall of the fixed 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.

[0012] 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.

[0013] 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.

[0014] 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 end, the accumulator outlet end is fixedly connected to the second oil chamber, and a first pressure measuring instrument is arranged between the accumulator outlet end and the second oil chamber.

[0015] Preferably, the oil return portion comprises an oil return pipe, one end of the oil return pipe is fixedly connected between the lower left port and the oil pump outlet, and the other end of the oil return pipe is fixedly connected to the oil cylinder.

[0016] Preferably, the hydraulic water circuit includes a water cylinder, the outlet end of the water cylinder is fixedly connected to the inlet end of a 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.

[0017] 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.

[0018] Preferably, the piston end of the hydraulic cylinder is fixedly connected to the piston end of the water hydraulic cylinder via a sleeve.

[0019] Compared with the prior art, the present invention has the following advantages and technical effects:

[0020] The present invention utilizes a hydraulic oil circuit to generate dynamic load impact, and utilizes a leakage detection device to determine whether there is leakage. The hydraulic oil circuit greatly simplifies the ordinary impact generating hydraulic circuit. The filling of the first oil chamber and the filling of the second oil chamber are realized through the hydraulic oil circuit. It is more streamlined and simpler to operate than the ordinary hydraulic circuit, while it also works smoothly, responds quickly, is easy to control, is simple to adjust, and is easy to operate, and the size of the impact generated can be accurately and conveniently adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0022] Figure 1 It is a system structure diagram of the present invention;

[0023] Figure 2 It is a cross-sectional view of the water hydraulic cylinder of the present invention;

[0024] Figure 3 It is a side view of the leakage detection device of the present invention;

[0025] Figure 4 It is an exploded view of the water hydraulic cylinder of the present invention;

[0026] Figure 5 It is an axonometric diagram of the connection between the hydraulic cylinder of the present invention and the water hydraulic cylinder;

[0027] Figure 6 It is a front view of the hydraulic cylinder and the water hydraulic cylinder of the present invention.

[0028] 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 pipeline; 18. return oil pipeline; 19. connecting seat. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0030] 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.

[0031] Reference Figure 1-Figure 6 The present invention provides a water hydraulic cylinder leakage detection test bench simulating dynamic load impact, comprising

[0032] The water hydraulic cylinder 7 comprises a first water chamber 701 and a second water chamber 702, wherein a leakage detection device 16 is arranged in the first water chamber 701;

[0033] A hydraulic water circuit, the hydraulic water circuit is fixedly connected to the second water chamber 702;

[0034] The hydraulic cylinder 6 comprises a first oil chamber 601 and a second oil chamber 602, and a piston end of the hydraulic cylinder 6 is fixedly connected to a piston end of the water hydraulic cylinder 7;

[0035] The hydraulic oil circuit is fixedly connected to the first oil chamber 601 and the second oil chamber 602 .

[0036] The bottom ends of the hydraulic cylinder 6 and the water hydraulic cylinder 7 are fixedly connected via a connecting seat 19 .

[0037] According to a further optimized 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 plurality of bolts 1601, and an inner electrode plate 1603 is circumferentially fixedly connected to the outer wall of the fixed seat 1602, and an outer electrode plate 1604 is circumferentially arranged on the outer wall of the water hydraulic cylinder 7, and the inner electrode plate 1603 corresponds to the outer electrode plate 1604.

[0038] 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 can be detected.

[0039] A further optimized solution is that the hydraulic oil circuit includes a cylinder 14, an 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, 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.

[0040] 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 left lower port 301, a right lower port 302, a left upper port 303, and a right upper port 304. The left lower port 301 is fixedly connected to the outlet end of the oil pump 1, the right lower port 302 is fixedly connected to the oil cylinder 14, the left upper port 303 is fixedly connected to the energy storage part, the right upper port 304 is fixedly connected to the first oil chamber 601, and the end of the oil return part is fixedly connected between the left lower port 301 and the outlet end of the oil pump 1.

[0041] A further optimized solution is that 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.

[0042] The hydraulic circuit is changed through the three-position four-way reversing valve 3, so that the hydraulic cylinder 6 and the accumulator 4 can complete the charging and discharging of energy. The accumulator 4 is used as the pressure power source to provide rapid, stable and large flow of oil, thereby solving the problem that the pressure and flow of ordinary hydraulic pumps do not meet the test requirements and ensuring the stability of the test process.

[0043] According to a further optimized solution, the oil return portion includes an oil return pipe 18 , one end of which is fixedly connected between the lower left port 301 and the outlet end of the oil pump 1 , and the other end of which is fixedly connected to the oil cylinder 14 .

[0044] A further optimized solution is provided, in which the hydraulic water circuit includes a water cylinder 13, wherein 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 a 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 a 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.

[0045] The hydraulic oil circuit includes a first oil chamber 601 stamping circuit, an accumulator 4 stamping circuit and an impact generating circuit. They correspond to the right position, middle position and left position of the three-position four-way reversing valve 3. The hydraulic water circuit includes a water hydraulic stamping circuit and a water hydraulic pressure relief circuit.

[0046] The first oil chamber 601 pressurizes the circuit: when the three-position four-way reversing valve 3 is in the right position, the oil pump 1 provides power to charge the first oil chamber 601, so that the piston of the hydraulic cylinder 6 moves to the far left. The pressure in the circuit is maintained by the first overflow valve 2.

[0047] 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 provides power to pressurize the accumulator 4 through the oil pump 1. The pressure in the circuit is maintained through the first overflow valve 2.

[0048] Impact generating circuit: When the three-position four-way reversing valve 3 is in the left position, the first oil chamber 601 is no longer pressurized but is directly connected to the oil cylinder 14, so that the oil can 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.

[0049] Water hydraulic stamping circuit: The high-pressure water pump 11 provides power to provide high-pressure liquid to the second water chamber 702, and the pressure in the circuit is maintained by the second overflow valve 10.

[0050] Water hydraulic pressure relief circuit: A stop valve 12 is added to the water hydraulic pressure circuit. When the test is completed, the stop valve 12 can be opened to allow the liquid to flow back to the water cylinder 13.

[0051] 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.

[0052] 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 , one end of a stop valve 12 is also 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 .

[0053] The stop valve 12 allows the high pressure water to flow back after the test is completed. The first pressure measuring instrument 5 and the second pressure measuring instrument 8 are used to detect the pressure and determine whether the charging is completed through the pressure change.

[0054] 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 via a sleeve 15 .

[0055] 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 the sleeve 15. The interference fit can make the connection stable, ensure the transmission effect of the impact, and will not cause damage to the piston end.

[0056] The working process of the present invention is as follows:

[0057] The first oil chamber 601 stamping circuit is used to make the three-position four-way reversing valve 3 in the right position and the water hydraulic stamping circuit is used together. The oil pump 1 and the high-pressure water pump 11 are turned on to inject high-pressure oil and high-pressure water into the first oil chamber 601 and the second water chamber 702 respectively, so that the piston of the hydraulic cylinder 6 and the piston of the water hydraulic cylinder 7 connected together move to the left until they move to the far left. When the value of the second pressure measuring instrument 8 is stable, the high-pressure water pump 11 is stopped. The accumulator 4 stamping circuit is used to move the three-position four-way reversing valve 3 to the middle position. At this time, oil is no longer injected into the first oil chamber 601, but the oil in the first oil chamber 601 is kept sealed. The oil pump 1 starts to inject high-pressure oil into the accumulator 4, and the pressure in the pipeline is detected by the first pressure measuring instrument 5. When the pressure displayed by the first pressure measuring instrument 5 is stable, the impact generation circuit is used to move the three-position four-way reversing valve 3 to the left position. At this time, the pipeline passage 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.

[0058] The impact is transmitted to the right water hydraulic cylinder 7 through the connected piston rods. At this time, the first water chamber 701 in the water hydraulic cylinder 7 is empty, while the high-pressure water in the second water chamber 702 is impacted. If the capacitance of the inner electrode plate 1603 and the outer electrode plate 1604 changes, it means that there is water leakage. If there is no change or the change is very small, it means that there is no leakage.

[0059] 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.

[0060] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0061] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A water hydraulic cylinder leakage detection test bench simulating dynamic load impact, characterized in that: include A water hydraulic cylinder (7), the water hydraulic cylinder (7) comprising a first water chamber (701) and a second water chamber (702), wherein a leakage detection device (16) is arranged in the first water chamber (701); a hydraulic water circuit, the hydraulic water circuit being fixedly connected to the second water chamber (702); A hydraulic cylinder (6), the hydraulic cylinder (6) comprising a first oil chamber (601) and a second oil chamber (602), the piston end of the hydraulic cylinder (6) being fixedly connected to the piston end of the water hydraulic cylinder (7); A hydraulic oil circuit, wherein the hydraulic oil circuit is fixedly connected to the first oil chamber (601) and the second oil chamber (602); The leakage detection device (16) comprises a fixed seat (1602), wherein the fixed seat (1602) is fixedly connected to the end of the piston rod in the first water chamber (701) via a plurality of bolts (1601), an inner electrode plate (1603) is circumferentially fixedly connected to the outer wall of the fixed seat (1602), an outer electrode plate (1604) is circumferentially arranged on the outer wall of the water hydraulic cylinder (7), and the inner electrode plate (1603) corresponds to the outer electrode plate (1604).

2. The water hydraulic cylinder leakage detection test bench simulating dynamic load impact according to claim 1 is characterized in that: The hydraulic oil circuit comprises an oil cylinder (14); an oil outlet of the oil cylinder (14) is fixedly connected to an inlet end of an oil pump (1); an outlet end of the oil pump (1) is fixedly connected to a first end of a four-way reversing portion; a second end of the four-way reversing portion is fixedly connected to the oil cylinder (14); a third end of the four-way reversing portion is fixedly connected to the second oil chamber (602) via an energy storage portion; a fourth end of the four-way reversing portion is fixedly connected to the first oil chamber (601); an end of an oil return portion is fixedly connected between the outlet end of the oil pump (1) and the first end of the four-way reversing portion; and the other end of the oil return portion is fixedly connected to the oil cylinder (14).

3. The water hydraulic cylinder leakage detection test bench simulating dynamic load impact according to claim 2 is characterized in that: The four-way reversing part comprises a three-position four-way reversing valve (3), the three-position four-way reversing valve (3) being provided with a left lower port (301), a right lower port (302), a left upper port (303), and a right upper port (304); the left lower port (301) is fixedly connected to the outlet end of the oil pump (1); the right lower port (302) is fixedly connected to the oil cylinder (14); the left upper port (303) is fixedly connected to the energy storage part; the right upper port (304) is fixedly connected to the first oil chamber (601); and the end of the oil return part is fixedly connected between the left lower port (301) and the outlet end of the oil pump (1).

4. The water hydraulic cylinder leakage detection test bench simulating dynamic load impact according to claim 3 is characterized in that: The energy storage unit comprises 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 provided between the outlet end of the accumulator (4) and the second oil chamber (602).

5. The water hydraulic cylinder leakage detection test bench simulating dynamic load impact according to claim 3 is characterized in that: The oil return portion comprises an oil return pipe (18), one end of the oil return pipe (18) is fixedly connected between the left lower 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).

6. The water hydraulic cylinder leakage detection test bench simulating dynamic load impact according to claim 1 is characterized in that: The hydraulic water circuit comprises 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 a 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 a 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).

7. The water hydraulic cylinder leakage detection test bench simulating dynamic load impact according to claim 6 is characterized in that: 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 also 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).

8. The water hydraulic cylinder leakage detection test bench simulating dynamic load impact according to claim 1 is characterized in that: The piston end of the hydraulic cylinder (6) is fixedly connected to the piston end of the water hydraulic cylinder (7) via a sleeve (15).

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