Device for detecting internal leakage amount of hydraulic oil cylinder

Abstract

The utility model discloses a hydraulic oil cylinder internal leakage amount detection device, and relates to the technical field of hydraulic machinery. The device comprises a first oil pipe, a level gauge, a measuring cylinder, a multi-caliber quick connector and a timing adjusting valve, the level gauge is fixed on the liquid outlet side of the first oil pipe, a liquid outlet of the first oil pipe is connected with the measuring cylinder, a liquid inlet of the first oil pipe is connected with the multi-caliber quick connector, and the timing adjusting valve is connected to the first oil pipe. When equipment is in a net state, oil supplied by a high-pressure measuring device reaches a certain pressure, the device is quickly mounted on a low-pressure measuring device to accurately measure whether a leakage phenomenon exists or not and the leakage amount value of oil in unit time, whether a problem exists in each link or not is judged according to relevant standards, the problem can be quickly found, and the working efficiency is improved. In addition, the device is light and not cumbersome, operation is easy to master, direct-reading data is accurate at any time, and the device is convenient to carry and very fast and convenient to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic machinery, and particularly relates to a leakage detection device for a hydraulic oil cylinder. Background Art

[0002] At present, when hydraulic machinery manufacturers and hydraulic maintenance factories at home and abroad determine the leakage of hydraulic systems or hydraulic components such as oil pumps, oil motors, and oil pressure valves, they usually use measuring cups or measuring tubes in the laboratory with balances, microelectronic scales, etc. to measure the tiny leakage. The operation is very troublesome, and sometimes you have to wait for the next day or longer to get specific data, which limits the production progress and the next step. In addition, the measured volume itself is very small, 0.5-1.2 ml, and the containers are poured in and out alternately. Due to the viscosity and strong surface buoyancy of the oil, it is difficult to pour it out cleanly in a short time, and the final measured data is inaccurate.

[0003] When encountering internal oil leakage and oil seepage phenomena such as hydraulic component product form inspection or product factory quality inspection and performance judgment after maintenance, it is not worth the effort to prepare a complete set of test instruments and professional test personnel. Usually, they are sent to professional laboratories for testing. The personnel are invited in, and the oil samples are sent out. The oil samples sent back and forth are either contaminated or insufficiently sampled. The sample liquid is not suitable for one time, so it is taken twice. After a long time, when the results come out, it is too late. The pressure test work such as personnel organization and on-site condition preparation has to be done again, which is very difficult to handle. It affects both the normal use of users and the work efficiency of manufacturers.

[0004] During the production of hydraulic components, the maintenance of hydraulic equipment and the commissioning of hydraulic systems, the pre-delivery pressure test is indispensable. External oil leakage of various hydraulic devices is directly visible, while internal leakage is very difficult to detect. It is under such circumstances that the production efficiency of hydraulic equipment cannot meet the requirements or the pressure relief cannot work normally, and the problem is often not found in a short time.

[0005] After nearly 20 years of manufacturing and repairing hydraulic cylinders, hydraulic motors, hydraulic pumps, and hydraulic valves, and encountering various scenarios and experiences, this direct-reading micro-oil measuring device was invented in 2021. After more than 3 years of countless practical applications, the effect is very good. The device is light and not bulky, the operation time is simple and easy to master, and the direct reading data can control the data accurately at any time. It is very quick and convenient to use. To this end, we provide a hydraulic cylinder leakage detection device to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a hydraulic cylinder leakage detection device, which can accurately measure whether there is a leakage and the leakage amount of oil per unit time by high-pressure measurement when the oil is supplied to a certain pressure and low-pressure measurement when the device is quickly installed, thereby solving the problem that it is very difficult to detect internal leakage of various hydraulic devices, resulting in the hydraulic equipment production efficiency not meeting the requirements.

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

[0008] The utility model is a device for detecting the internal leakage of a hydraulic oil cylinder, comprising a No. 1 oil pipe, a level, a measuring cylinder, a multi-caliber quick connector and a timing regulating valve, wherein the liquid outlet side of the No. 1 oil pipe is fixed with the level, the liquid outlet of the No. 1 oil pipe is connected with a measuring cylinder, the liquid inlet of the No. 1 oil pipe is connected with a multi-caliber quick connector, and the No. 1 oil pipe is connected with a timing regulating valve.

[0009] The utility model is further configured that a group of evenly distributed interfaces are arranged on the multi-caliber quick connector, and one interface of the multi-caliber quick connector is connected to a No. 2 pipe opening on one side of the oil cylinder.

[0010] The utility model is further configured that the oil cylinder is limited on a limit seat, and the oil cylinder is connected to both the oil inlet mechanism and the oil replenishing mechanism.

[0011] The utility model is further configured such that the oil inlet mechanism includes a No. 2 oil pipe, a liquid inlet end and a No. 1 connecting end, one end of the No. 2 oil pipe is the liquid inlet end, the other end of the No. 2 oil pipe is the No. 1 connecting end, and the No. 1 connecting end is connected to the No. 1 pipe opening on the other side of the oil cylinder.

[0012] The utility model is further configured such that a limited flow pressure regulating valve is connected to the No. 2 oil pipe near the liquid inlet end, a pressure gauge is connected to the No. 2 oil pipe near the No. 1 connection end, and the liquid inlet end is connected to the liquid supply pipe.

[0013] The utility model is further configured such that the oil replenishing mechanism includes a No. 3 oil pipe, a No. 2 connecting end and a No. 3 connecting end, one end of the No. 3 oil pipe is the No. 2 connecting end, the other end of the No. 3 oil pipe is the No. 3 connecting end, and the No. 3 connecting end is connected to an interface of a multi-caliber quick connector.

[0014] The utility model is further configured that the No. 3 oil pipe close to the No. 2 connecting end is connected with an oil supply pipe, and the oil supply pipe is connected with a stop valve.

[0015] The utility model has the following beneficial effects: when the equipment is in a clean state, the high-pressure test feeds oil to a certain pressure, and the low-pressure test quickly installs the device to accurately measure whether there is a leakage and the amount of oil leakage per unit time, and compares it with relevant standards to determine whether there is a problem in each link, and the problem can be quickly found. In addition, the device is light and not bulky, the operation room is simple and easy to master, the direct reading data can control the data accurately at any time, it is easy to carry, and it is very quick and convenient to use.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the internal leakage measurement device when measuring the hydraulic cylinder.

[0019] Figure 2 The schematic diagram of the structure of the internal leakage measurement device is shown in FIG.

[0020] Figure 3 It is a structural diagram of the oil inlet mechanism.

[0021] Figure 4 It is a structural diagram of the oil replenishment mechanism.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 100, No. 1 oil pipe; 110, level; 120, measuring cylinder; 130, multi-caliber quick connector; 140, interface; 150, timing regulating valve; 200, oil cylinder; 210, No. 1 pipe outlet; 220, No. 2 pipe outlet; 230, limit seat; 300, oil inlet mechanism; 310, No. 2 oil pipe; 320, liquid inlet end; 330, No. 1 connecting end; 340, flow limiting and pressure regulating valve; 350, pressure gauge; 400, oil replenishment mechanism; 410, No. 3 oil pipe; 420, No. 2 connecting end; 430, No. 3 connecting end; 440, oil replenishment pipe; 450, stop valve. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figures 1 to 4 The utility model is a device for detecting the internal leakage of a hydraulic cylinder, comprising a No. 1 oil pipe 100, a level 110, a measuring cylinder 120, a multi-caliber quick connector 130 and a timing regulating valve 150. A level 110 is fixed to the liquid outlet side of the No. 1 oil pipe 100, and the level 110 is kept horizontal so that the measuring cylinder 120 can read data in a vertical state to ensure the accuracy of the pointer. The liquid outlet of the No. 1 oil pipe 100 is connected with a measuring cylinder 120, and the measuring cylinder 120 has a measurement accuracy of 0.1 ml, and can directly read values ​​of smaller volumes such as 0.1 ml-0.5 ml-1 ml, so as to accurately grasp the amount of tiny internal leakage and determine the quality of high-precision hydraulic components. The liquid inlet of the No. 1 oil pipe 100 is connected with a multi-caliber quick connector 130, and the No. 1 oil pipe 100 is connected with a timing regulating valve 150, which is closed when the pressure test time reaches the set time, and is used to accurately read the parameters at the specified time.

[0026] Specifically, a group of evenly distributed interfaces 140 are installed on the multi-caliber quick connector 130, and a handle is fixed on the multi-caliber quick connector 130. The interface 140 is used to adapt to the connection of various commonly used pipes with different diameters. The handle is convenient for operation and grasping. One interface 140 of the multi-caliber quick connector 130 is connected to the second pipe port 220 on one side of the oil cylinder 200;

[0027] The interface 140 is connected with a plug-in self-locking gate. When the pipe is inserted and the pipe plug is inserted, the gate of the pipeline is naturally pushed open. When the pipe joint is pulled out, the gate is automatically closed. When the gate of any of the four channels is opened, the gates of the other three channels remain closed.

[0028] The oil cylinder 200 is limited on the limit seat 230, and the limit seat 230 limits the cylinder rod of the oil cylinder 200 to a certain position; when testing the hydraulic oil cylinder 200 or the motor, the rotor is fixed to limit its rotational movement; when testing the pressure sliding valve, the valve stem is fixed at a certain position and cannot slide. The oil cylinder 200 is connected to the oil inlet mechanism 300 and the oil replenishing mechanism 400.

[0029] Furthermore, the oil inlet mechanism 300 includes a No. 2 oil pipe 310, a liquid inlet end 320 and a No. 1 connecting end 330. One end of the No. 2 oil pipe 310 is the liquid inlet end 320, and the other end of the No. 2 oil pipe 310 is the No. 1 connecting end 330. The No. 1 connecting end 330 is connected to the No. 1 pipe opening 210 on the other side of the oil cylinder 200. A flow limiting pressure regulating valve 340 is connected to the No. 2 oil pipe 310 near the liquid inlet end 320. The flow limiting pressure regulating valve 340 gradually opens from closed to open under rated pressure, so that the test pressure slowly reaches the full pressure state to avoid impact. A pressure gauge 350 is connected to the No. 2 oil pipe 310 near the No. 1 connecting end 330, and the liquid inlet end 320 is connected to the liquid supply pipe.

[0030] Among them, the oil replenishing mechanism 400 includes a No. 3 oil pipe 410, a No. 2 connecting end 420 and a No. 3 connecting end 430. One end of the No. 3 oil pipe 410 is the No. 2 connecting end 420, and the other end of the No. 3 oil pipe 410 is the No. 3 connecting end 430. The No. 3 connecting end 430 is connected to an interface 140 of the multi-caliber quick connector 130. The No. 3 oil pipe 410 near the No. 2 connecting end 420 is connected with an oil replenishing pipe 440. The oil replenishing pipe 440 is used to replenish oil when the low pressure is measured from no oil to full oil. When the leakage is small, the oil cannot fill the cavity in a short time. When the tank is full, bubbles are often generated, which affects the stability of the read data. In order to read the data accurately, the bubbles in the oil need to be emptied. The oil replenishing pipe 440 is connected with a stop valve 450.

[0031] The operation process of this embodiment is as follows:

[0032] ①1.5MPa low-pressure oil is connected to the liquid inlet end 320, and the flow-limiting pressure regulating valve 340 is opened, so that the oil enters the lower chamber of the oil cylinder 200 through the No. 2 oil pipe 310. If the piston of the oil cylinder 200 leaks oil, the leaked oil will pass through the piston seal of the oil cylinder 200 and enter the upper chamber of the oil cylinder 200. After the upper chamber of the oil cylinder 200 is full of oil, it will overflow to the multi-caliber quick connector 130, enter the No. 1 oil pipe 100 through the interface 140, and then enter the measuring cylinder 120 from the lower end of the measuring cylinder 120 and overflow upward to the zero position starting point of the scale line. During this process, the level 110 is operated to a horizontal state.

[0033] ② If there is no oil leakage from the piston of the oil cylinder 200, pour the oil from the oil replenishing pipe 440 to the upper chamber of the oil cylinder 200 until the oil is full, and the oil flows into the measuring cylinder 120 through the No. 1 oil pipe 100, so that the oil reaches the zero starting point of the measuring cylinder 120. During this process, the level 110 is operated to a horizontal state.

[0034] ③ Close the flow-limiting pressure regulating valve 340 at the liquid inlet end 320 of the group, increase the oil pressure from the test bench to the rated pressure value, remove the low-pressure pressure gauge 350 and drain the bubbles in the lower chamber of the oil cylinder 200, and then replace it with the high-pressure pressure gauge 350; drain the bubbles in the upper chamber of the oil cylinder 200 and close the stop valve 450 of the oil supply pipe 440, use the timing regulating valve 150 to count and open the flow-limiting pressure regulating valve 340 for one minute, wait until the oil pressure stabilizes at the rated pressure value, close the time lock of the flow-limiting pressure regulating valve 340 and the timing regulating valve 150.

[0035] ④ Observe the rising value of the oil level in the measuring cylinder 120 and directly read the internal leakage of the piston seal of the cylinder 200 under the rated pressure in one minute. The volume of the leaked oil in the lower chamber of the cylinder 200 - the upper chamber of the cylinder 200 can be measured very accurately.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A device for detecting leakage in a hydraulic cylinder, comprising a No. 1 oil pipe (100), a level gauge (110), a measuring cylinder (120), a multi-caliber quick connector (130) and a timing regulating valve (150); characterized in that: A level (110) is fixed to the liquid outlet side of the No. 1 oil pipe (100), a measuring cylinder (120) is connected to the liquid outlet of the No. 1 oil pipe (100), a multi-caliber quick connector (130) is connected to the liquid inlet of the No. 1 oil pipe (100), and a timing regulating valve (150) is connected to the No. 1 oil pipe (100).

2. A hydraulic cylinder leakage detection device according to claim 1, characterized in that: A group of evenly distributed interfaces (140) are installed on the multi-caliber quick connector (130), and one of the interfaces (140) of the multi-caliber quick connector (130) is connected to a No. 2 pipe port (220) on one side of the oil cylinder (200).

3. A hydraulic cylinder leakage detection device according to claim 2, characterized in that: The oil cylinder (200) is limited on the limit seat (230), and the oil cylinder (200) is connected to both the oil inlet mechanism (300) and the oil replenishment mechanism (400).

4. A hydraulic cylinder leakage detection device according to claim 3, characterized in that: The oil inlet mechanism (300) comprises a No. 2 oil pipe (310), a liquid inlet end (320) and a No. 1 connecting end (330), one end of the No. 2 oil pipe (310) being the liquid inlet end (320), the other end of the No. 2 oil pipe (310) being the No. 1 connecting end (330), and the No. 1 connecting end (330) being connected to the No. 1 pipe opening (210) on the other side of the oil cylinder (200).

5. A hydraulic cylinder leakage detection device according to claim 4, characterized in that: The No. 2 oil pipe (310) near the liquid inlet end (320) is connected to a limited flow pressure regulating valve (340), the No. 2 oil pipe (310) near the No. 1 connection end (330) is connected to a pressure gauge (350), and the liquid inlet end (320) is connected to a liquid supply pipe.

6. A hydraulic cylinder leakage detection device according to claim 3, characterized in that: The oil replenishing mechanism (400) comprises a No. 3 oil pipe (410), a No. 2 connecting end (420) and a No. 3 connecting end (430), one end of the No. 3 oil pipe (410) is the No. 2 connecting end (420), the other end of the No. 3 oil pipe (410) is the No. 3 connecting end (430), and the No. 3 connecting end (430) is connected to an interface (140) of a multi-caliber quick connector (130).

7. A hydraulic cylinder leakage detection device according to claim 6, characterized in that: The No. 3 oil pipe (410) close to the No. 2 connection end (420) is connected to an oil replenishment pipe (440), and the oil replenishment pipe (440) is connected to a stop valve (450).

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