A hydraulic cylinder oil injection device

Abstract

This utility model discloses a hydraulic cylinder oil injection device, belonging to the field of oil and gas pipeline technology. It includes an oil storage tank, an oil delivery pipe, a power pump, and a level measuring device. The oil storage tank holds hydraulic oil. One end of the oil delivery pipe is connected to the oil storage tank, and the other end is equipped with an oil injection nozzle, which is detachably connected to the hydraulic cylinder. A locking device is provided at the connection between the oil injection nozzle and the hydraulic cylinder to lock the nozzle. The power pump is located on the oil delivery pipe and is used to deliver the hydraulic oil from the oil storage tank to the hydraulic cylinder. The level measuring device is electrically connected to the power pump and is used to measure the actual hydraulic oil level in the cylinder, generating control commands based on the actual level to control the operation of the power pump. In summary, this hydraulic cylinder oil injection device, through the coordinated operation of its components, achieves the storage, delivery, and intelligent oil injection control of hydraulic oil. Furthermore, the locking device at the connection between the oil injection nozzle and the hydraulic cylinder ensures the stability and sealing of the connection, thus improving the overall efficiency and quality of oil injection.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas pipeline technology, and in particular to an oil cylinder injection device. Background Technology

[0002] A pneumatic-hydraulic linkage valve is a key device in oil and gas pipeline systems used to control the flow of media. Its main function is to control the flow of media within the pipeline. The working principle of a pneumatic-hydraulic linkage valve is based on the mutual conversion and transmission mechanism between gas pressure and liquid pressure. Generally, high-pressure gas transported in the pipeline is used as a power source. With the help of a specific conversion device, the high-pressure gas pressure is transmitted to the hydraulic oil in the cylinder. Since the hydraulic oil is incompressible, it pushes the piston to move, ultimately driving the valve to open and close, thereby achieving precise control of the pipeline media.

[0003] During the operation of the pneumatic-hydraulic linkage valve, the hydraulic oil not only acts as a medium for pressure transmission, ensuring that gas pressure can be effectively transmitted to the valve actuator, but also lubricates various moving parts, reducing wear caused by friction between components and extending the service life of the equipment. Furthermore, the oil also possesses certain sealing properties, helping to maintain stable system pressure and ensuring the reliable operation of the pneumatic-hydraulic linkage valve.

[0004] Because pneumatic-hydraulic linkage valves operate in complex and variable environments and require frequent opening and closing operations, the oil level in the cylinder will decrease due to factors such as evaporation and component wear. To ensure that the pneumatic-hydraulic linkage valve maintains good working condition, stable pressure transmission, and reliable valve operation, it is necessary to replenish the oil in the cylinder in a timely manner.

[0005] Currently, existing technical methods mainly rely on manual operation. In routine maintenance, maintenance personnel first need to check the hydraulic cylinder level using a dipstick. If the oil level is too low to be measured with the dipstick, they can only make a rough judgment about the oil condition based on experience. When it is confirmed that the hydraulic cylinder level is low and needs to be added, or when the cylinder is opened or closed and the oil level is not in accordance with the requirements and needs to be emptied, all of these tasks must be completed manually.

[0006] However, existing manual oil filling and emptying procedures are cumbersome. From checking the fluid level and preparing the filling tools to actually completing the filling or emptying operation, the entire process is time-consuming, significantly increasing the working hours of maintenance personnel and severely reducing the efficiency of maintenance work. Furthermore, manual measurement and emptying processes are difficult to control precisely, making hydraulic oil leaks highly likely. Once hydraulic oil leaks, it not only wastes resources but also pollutes the surrounding environment, failing to meet current environmental protection requirements. Utility Model Content

[0007] The purpose of this utility model is to provide a hydraulic cylinder oil injection device to solve the technical problems of low efficiency and poor accuracy in the prior art, which involves manual measurement and oil injection operations.

[0008] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0009] A hydraulic cylinder oil injection device, comprising:

[0010] Oil storage drum, used to hold hydraulic oil;

[0011] An oil supply pipe is provided, one end of which is connected to the oil storage tank, and the other end is provided with an oil injection nozzle, which is detachably connected to an oil cylinder; a locking component is provided at the connection between the oil injection nozzle and the oil cylinder, which is used to lock the oil injection nozzle.

[0012] A power pump, installed in the oil supply pipe, is used to transport the hydraulic oil in the oil storage tank to the oil cylinder through the oil supply pipe;

[0013] A liquid level measuring device is electrically connected to the power pump. The liquid level measuring device is used to measure the actual liquid level of the hydraulic oil in the oil cylinder and control the operation of the power pump based on the actual liquid level.

[0014] Preferably, a filter is provided on the oil pipeline to filter the hydraulic oil in the oil pipeline.

[0015] Preferably, the oil pipeline includes multiple pipeline segments, which are connected end to end in sequence and are detachably connected, and the length of at least some of the pipeline segments is adjustable.

[0016] Preferably, a seal is provided at the connection between two adjacent pipe sections.

[0017] Preferably, the oil nozzle extends inward at an angle close to the oil cylinder to form an inverted conical oil injection channel.

[0018] Preferably, the oil pipeline is equipped with a one-way check valve.

[0019] Preferably, the oil cylinder filling device further includes an alarm, which is electrically connected to the liquid level measuring element. When the actual liquid level value is lower than the target liquid level value, the alarm generates an alarm response.

[0020] Preferably, the locking element is a locking ring, which is disposed at the inlet of the hydraulic cylinder. The locking ring has a connecting channel inside for connecting the hydraulic cylinder. A limiting protrusion is formed on a portion of the inner wall of the connecting channel, and a positioning groove is correspondingly provided on a portion of the outer wall of the oil nozzle. The oil nozzle can extend into the connecting channel to connect the oil supply pipe and the hydraulic cylinder. The locking ring can rotate around its own circumference. When the limiting protrusion is aligned with the positioning groove, the oil nozzle can move axially along the connecting channel. When the limiting protrusion deviates from the positioning groove, the limiting protrusion can restrict the movement of the oil nozzle relative to the connecting channel.

[0021] Preferably, the outer wall of the oil storage tank is provided with a handle, and the bottom of the oil storage tank is provided with casters.

[0022] Preferably, the side wall of the oil storage tank is provided with a transparent observation window, and the surface of the transparent observation window is provided with scale lines.

[0023] The beneficial effects of this utility model are:

[0024] This utility model proposes a hydraulic cylinder oil injection device that uses an oil storage tank to hold hydraulic oil, providing a reserve for oil injection. One end of the oil supply pipe is connected to the oil storage tank, and the other end is equipped with an oil injection nozzle, which is detachably connected to the hydraulic cylinder, facilitating connection with different hydraulic cylinders and offering strong applicability. A locking component at the connection between the oil injection nozzle and the hydraulic cylinder securely locks the nozzle, preventing it from detaching from the cylinder during injection, ensuring stability and sealing, and preventing oil leakage. A power pump is installed on the oil supply pipe, providing power to smoothly deliver the hydraulic oil from the storage tank to the hydraulic cylinder, ensuring the injection operation can be performed. A level measuring device measures the actual hydraulic oil level in the cylinder in real time and generates control commands based on this measurement, thereby controlling the operation of the power pump. This makes the injection process more intelligent and precise, automatically adjusting the injection based on the actual oil level in the cylinder, avoiding errors caused by human experience in judgment that could lead to over- or under-injection, effectively improving injection efficiency and quality. In summary, this hydraulic cylinder oil injection device achieves the storage, delivery, and intelligent oil injection control of hydraulic oil through the coordinated operation of components such as the oil storage tank, oil delivery pipe, power pump, and liquid level measuring device. Furthermore, the locking component at the connection between the oil injection nozzle and the hydraulic cylinder ensures the stability and sealing of the connection, thereby improving the overall efficiency and quality of oil injection. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the oil cylinder injection device provided in this embodiment of the utility model.

[0026] In the picture:

[0027] 1. Oil storage tank; 2. Oil cylinder; 3. Oil delivery pipe; 4. Oil injection nozzle; 5. Locking device; 6. Power pump;

[0028] 7. Liquid level measuring device; 8. Filter. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] See Figure 1The hydraulic cylinder oil injection device provided in this embodiment includes an oil storage tank 1, an oil delivery pipe 3, a power pump 6, and a liquid level measuring component 7. The oil storage tank 1 is used to hold hydraulic oil; one end of the oil delivery pipe 3 is connected to the oil storage tank 1, and the other end is equipped with an oil injection nozzle 4, which is detachably connected to the hydraulic cylinder 2; a locking component 5 is provided at the connection between the oil injection nozzle 4 and the hydraulic cylinder 2 to lock the oil injection nozzle 4; the power pump 6 is located on the oil delivery pipe 3 and is used to deliver the hydraulic oil in the oil storage tank 1 to the hydraulic cylinder 2 through the oil delivery pipe 3; the liquid level measuring component 7 is electrically connected to the power pump 6 and is used to measure the actual liquid level value of the hydraulic oil in the hydraulic cylinder 2, and control the operation of the power pump 6 based on the actual liquid level value.

[0034] The hydraulic cylinder injection device proposed in this utility model uses an oil storage tank 1 to hold hydraulic oil, providing oil reserves for injection. One end of the oil supply pipe 3 is connected to the oil storage tank 1, and the other end is equipped with an injection nozzle 4. The injection nozzle 4 is detachably connected to the hydraulic cylinder 2, facilitating connection with different hydraulic cylinders 2 and offering strong applicability. The locking member 5 at the connection between the injection nozzle 4 and the hydraulic cylinder 2 can lock the injection nozzle 4 through its own structure, preventing the injection nozzle 4 from disengaging from the hydraulic cylinder 2 during the injection process, ensuring the stability and sealing of the injection, and avoiding oil leakage. The power pump 6 is installed on the oil supply pipe 3, and its function is to provide power to smoothly deliver the hydraulic oil in the oil storage tank 1 to the hydraulic cylinder 2 through the oil supply pipe 3, ensuring that the injection operation can be realized. The level measuring component 7 measures the actual hydraulic oil level in the cylinder 2 in real time and generates control commands based on these measurements. This controls the operation of the power pump 6, making the oil injection process more intelligent and precise. It automatically adjusts the oil injection based on the actual oil level in the cylinder 2, avoiding errors caused by human experience that could lead to over- or under-injection, effectively improving injection efficiency and quality. In summary, this cylinder oil injection device, through the coordinated operation of components such as the oil storage tank 1, oil delivery pipe 3, power pump 6, and level measuring component 7, achieves the storage, delivery, and intelligent injection control of hydraulic oil. Furthermore, the locking component 5 at the connection between the injection nozzle 4 and the cylinder 2 ensures the stability and sealing of the connection, thus improving overall injection efficiency and quality.

[0035] The specific structure and working principle of the hydraulic cylinder oil injection device will be explained in detail below.

[0036] The oil storage tank 1 is used to contain hydraulic oil. Specifically, the side wall of the oil storage tank 1 has an oil inlet and a threaded sealing cap. The oil inlet is used to inject hydraulic oil into the oil storage tank 1, and the sealing cap is used to seal the oil and prevent external impurities from contaminating the hydraulic oil inside the tank. A sealing gasket is placed between the sealing cap and the oil inlet. By tightening the sealing cap, the sealing gasket is compressed, thus achieving an airtight seal of the internal cavity of the oil storage tank 1. The top of the oil storage tank 1 has a connection port for connecting the oil supply pipe 3.

[0037] Specifically, the outer wall of the oil storage tank 1 is provided with a handle. The handle is arc-shaped and there are two handles. The two handles are symmetrically arranged about the oil storage tank 1 so that the operator can hold it for transportation and installation of the oil storage tank 1.

[0038] More specifically, the bottom of the oil storage drum 1 is equipped with casters. The casters are omnidirectional casters, fixed to the bottom edge of the oil storage drum 1 by a wheel frame. Triangular reinforcing ribs are provided at the connection between the wheel frame and the oil storage drum 1 to improve structural strength. When it is necessary to move the oil storage drum 1, the operator pushes and pulls the oil storage drum 1 by holding the handle, and the casters roll on the ground for transportation, achieving labor-saving handling.

[0039] Preferably, the side wall of the oil storage tank 1 is provided with a transparent observation window, and the surface of the transparent observation window is provided with scale lines. This allows the operator to directly read the current oil volume through the transparent observation window without opening the sealed cap, and to judge the oil condition according to the scale lines.

[0040] The hydraulic oil in the storage tank 1 needs to be transported through the oil delivery pipe 3. Specifically, the oil delivery pipe 3 consists of multiple pipe sections, which are connected end-to-end and detachable, making the installation, maintenance, and transportation of the oil delivery pipe 3 more convenient. When facing cylinders 2 with different installation spaces or layouts, the multiple detachable pipe sections allow operators to flexibly increase or decrease the number of pipe sections to adapt to actual needs; and at least some pipe sections are adjustable in length, thus allowing the overall length of the oil delivery pipe 3 to be flexibly adjusted by changing its length, ensuring accurate connection between the storage tank 1 and the cylinder 2, avoiding connection difficulties due to unsuitable distances or excessive bending of the oil delivery pipe 3, thereby ensuring smooth delivery of hydraulic oil and improving the versatility of the device.

[0041] Specifically, the adjustable-length pipe section includes an inner pipe and an outer pipe. The outer diameter of the inner pipe is slightly smaller than the inner diameter of the outer pipe, allowing the inner pipe to slide freely within the outer pipe. A positioning protrusion is elastically installed radially on the inner pipe wall. Multiple positioning holes are radially drilled through the outer pipe wall, spaced apart axially. The positioning protrusion can selectively engage with any of these holes, thus securing the inner and outer pipes. When the pipe section length needs adjustment, the operator applies a certain axial force to both the inner and outer pipes. Due to the elasticity of the positioning protrusion, it retracts inward under external force, disengaging from its current positioning groove. At this point, the inner pipe can slide freely within the outer pipe. The operator then slides the inner pipe to the appropriate position according to the actual needs and engages the positioning protrusion with the corresponding positioning hole, thus completing the pipe section length adjustment process.

[0042] In other embodiments, the pipe section may also be configured as a flexible corrugated pipe, the length of which can be adjusted by stretching or compressing the corrugated pipe, and its specific form is not limited herein.

[0043] In this embodiment, the oil pipeline 3 includes three pipe sections: one pipe section extending horizontally and two pipe sections extending vertically at both ends. The three pipe sections are arranged in a Z-shape. The two pipe sections extending vertically are used to connect the oil cylinder 2 and the oil storage tank 1, respectively.

[0044] Preferably, a seal is provided at the connection between two adjacent pipe sections. The seal effectively fills the gap between the two pipe sections, preventing hydraulic oil from leaking from the connection. This not only avoids the waste of hydraulic oil but also prevents it from polluting the working environment. Moreover, the good sealing performance ensures that the hydraulic oil in the oil delivery pipe 3 always maintains a stable pressure, guaranteeing that the hydraulic oil is smoothly and efficiently delivered from the oil storage tank 1 to the oil cylinder 2.

[0045] The sealing components can be existing sealing rings, gaskets, sealing sleeves, etc., which will not be elaborated here.

[0046] A power pump 6 is installed on the oil supply pipe 3 to provide power for transporting hydraulic oil from the storage tank 1 to the cylinder 2 via the oil supply pipe 3. Specifically, the power pump 6 includes a motor, pump body, impeller, and pump shaft. The motor serves as the power source, providing power for the operation of the entire power pump 6. After the motor is energized, the rotor begins to rotate at high speed. One end of the pump shaft is connected to the motor rotor, and the other end is fixed to the impeller. When the motor drives the pump shaft to rotate, the pump shaft synchronously drives the impeller to rotate. The impeller is located inside the pump body, which has a specific cavity structure. Its inlet is connected to the end of the oil supply pipe 3 that connects to the storage tank 1, and its outlet is connected to the part of the oil supply pipe 3 that leads to the cylinder 2. The impeller has multiple blades. When the impeller rotates at high speed inside the pump body, the blades drive the surrounding hydraulic oil to rotate as well. Under the action of centrifugal force, the hydraulic oil is thrown from the center of the impeller to the edge of the impeller, thus creating a low-pressure area at the center of the impeller. Hydraulic oil in storage tank 1 is drawn into the pump inlet through oil delivery pipe 3 under atmospheric pressure or level difference, filling the low-pressure area at the center of the impeller. The hydraulic oil thrown to the edge of the impeller gains higher kinetic and pressure energy, and is then forced into oil delivery pipe 3 through the pump outlet, and then transported to cylinder 2 along oil delivery pipe 3, realizing the pumping process of hydraulic oil from storage tank 1 to cylinder 2.

[0047] Preferably, a filter 8 is provided on the oil supply pipe 3 to filter the hydraulic oil in the oil supply pipe 3. The filter 8 can effectively intercept impurities that may exist in the hydraulic oil, such as metal shavings and dust particles, improve the quality of the hydraulic oil, ensure the purity of the hydraulic oil in the cylinder 2, and ensure the normal operation of the oil and gas pipeline system.

[0048] Specifically, the filter 8 comprises a housing, a filter screen, and a fixing frame. The housing has interfaces at both ends for connection to the oil supply pipe 3, ensuring smooth flow of hydraulic oil into and out of the filter 8. A closed filtration chamber is formed inside the housing. The filter screen is made of metal wire mesh or high-performance filter material, with its mesh size determined by the required filtration precision. The filter screen is cylindrical and placed within the filtration chamber inside the housing. The fixing frame is used to secure the filter screen inside the housing. The fixing frame is adapted to the shape of the filter screen and is connected to the inner wall of the housing by bolts, ensuring that the filter screen does not shift or shake during filtration.

[0049] When hydraulic oil flows from the oil supply pipe 3 into the filter 8, it first enters the filter chamber inside the housing. Under pressure, the hydraulic oil is forced through the filter screen. The fine mesh of the filter screen blocks impurities in the hydraulic oil, such as metal shavings, particles, and colloids, causing these impurities to remain on the surface or inside the filter screen. The clean hydraulic oil, after being filtered, passes through the filter screen and continues to flow into the oil supply pipe 3 through the interface at the other end of the housing, and is then transported to the oil cylinder 2. This achieves the filtration process of the hydraulic oil in the oil supply pipe 3, ensuring the cleanliness of the hydraulic oil entering the oil cylinder 2.

[0050] Preferably, a one-way check valve is installed on the oil supply pipe 3. The one-way check valve can effectively prevent hydraulic oil backflow. During the oil filling process, when the power pump 6 stops working or the system pressure fluctuates abnormally, the one-way check valve can prevent the hydraulic oil in the cylinder 2 from flowing back to the storage tank 1 along the oil supply pipe 3. This ensures that the hydraulic oil already injected into the cylinder 2 can be kept in the cylinder 2, maintaining the stability of the pressure inside the cylinder 2, ensuring that the pneumatic-hydraulic linkage valve and other related equipment can work normally, and avoiding malfunctions or failures in the equipment due to hydraulic oil backflow.

[0051] Among them, the one-way check valve is a common mechanical device in this field. Its working principle and specific structure will not be described in detail here.

[0052] Hydraulic oil in the oil supply pipe 3 is delivered by the power pump 6 and finally injected into the cylinder 2 through the oil filling nozzle 4. Specifically, the oil filling nozzle 4 extends inward at an angle close to the cylinder 2 to form an inverted conical oil filling channel. The inverted conical oil filling channel can accelerate the hydraulic oil during injection. As the inner diameter of the oil filling channel gradually decreases, according to the principle of fluid continuity, the hydraulic oil flow rate increases, allowing the oil to better fill the cylinder 2 and reducing cavitation. In addition, because the inner diameter of the inverted conical oil filling channel is reduced at the end close to the cylinder 2, it can fit more tightly with the inlet of the cylinder 2, reducing the risk of hydraulic oil leakage due to loose connection.

[0053] A locking element 5 is provided at the connection between the oil nozzle 4 and the oil cylinder 2 to lock the oil nozzle 4, so as to prevent the oil nozzle 4 from accidentally falling off due to equipment vibration or other reasons during the oil injection process, which would cause hydraulic oil to leak out, affect the environment, and waste resources.

[0054] Specifically, the locking element 5 is a locking ring, which is located at the inlet of the oil cylinder 2. The locking ring has a connecting channel inside for connecting the oil cylinder 2. A limiting protrusion is formed on the inner wall of part of the connecting channel, and a positioning groove is correspondingly provided on the outer wall of part of the oil nozzle 4. The oil nozzle 4 can extend into the connecting channel to connect the oil supply pipe 3 and the oil cylinder 2. The locking ring can rotate around its own circumference. When the limiting protrusion is aligned with the positioning groove, the oil nozzle 4 can move along the axial direction of the connecting channel. When the limiting protrusion deviates from the positioning groove, the limiting protrusion can restrict the movement of the oil nozzle 4 relative to the connecting channel.

[0055] In use, first, align the oil nozzle 4 with the locking ring connection channel at the inlet of the cylinder 2, and slowly insert the oil nozzle 4 into the connection channel. Then, rotate the locking ring to align the limiting protrusion with the positioning groove on the outer wall of the oil nozzle 4. At this time, the oil nozzle 4 can move axially along the connection channel. Continue pushing the oil nozzle 4 until it reaches the appropriate position, completing the connection between the oil supply pipe 3 and the cylinder 2. Finally, rotate the locking ring again to deviate the limiting protrusion from the positioning groove. At this time, the limiting protrusion restricts the movement of the oil nozzle 4, thus firmly fixing the oil nozzle 4 at the inlet of the cylinder 2. When it is necessary to disassemble the oil nozzle 4, rotate the locking ring in the opposite direction to align the limiting protrusion with the positioning groove again. At this time, the oil nozzle 4 can move axially along the connection channel. Pull the oil nozzle 4 out of the connection channel to separate the oil supply pipe 3 from the cylinder 2.

[0056] In other embodiments, the locking element 5 can also be a threaded sleeve. The inlet of the oil cylinder 2 is provided with a threaded sleeve. By providing a threaded line at the end of the oil injection nozzle 4, the oil injection nozzle 4 and the threaded sleeve are threadedly connected, thereby achieving the connection effect of the oil supply pipe 3 and the locking effect of the oil injection nozzle 4.

[0057] It is understandable that the specific implementation of the locking component 5 is not limited here, as long as it can achieve the locking and unlocking effect on the oil nozzle 4.

[0058] The level measuring element 7 is electrically connected to the power pump 6 and is used to measure the actual level of hydraulic oil in the oil cylinder 2, and to control the operation of the power pump 6 based on the actual level.

[0059] Specifically, the liquid level measuring device 7 includes an ultrasonic sensor, a signal processing circuit, and a microcontroller. The ultrasonic sensor is mounted above the hydraulic cylinder 2 and connected to the oil supply pipe 3, with its output end facing the hydraulic oil surface inside the cylinder 2. The ultrasonic sensor has the function of transmitting and receiving ultrasonic signals. The signal processing circuit is connected to the ultrasonic sensor and is used to process the electrical signals transmitted and received by the ultrasonic sensor. When the ultrasonic sensor transmits an ultrasonic signal, the signal processing circuit starts timing. The ultrasonic wave propagates in the air, reflects back after encountering the hydraulic oil surface, and is received by the ultrasonic sensor. The signal processing circuit stops timing and amplifies, filters, and converts the received weak electrical signal into a more easily processed signal form. The microcontroller is connected to the signal processing circuit and is used to receive the processed signal and calculate the distance from the ultrasonic sensor to the hydraulic oil surface based on the speed of ultrasonic wave propagation in the air and the round-trip time of the signal. Since the height of the hydraulic cylinder 2 is a known fixed value, the microcontroller can obtain the actual liquid level of the hydraulic oil inside the cylinder 2 through simple mathematical calculations. Meanwhile, the microcontroller compares the actual liquid level with the preset target liquid level value and generates corresponding control commands, such as controlling the start, stop or adjust the running speed of the power pump 6, so as to achieve precise control of the oil filling process of the oil cylinder 2 and complete the functions of liquid level monitoring and control.

[0060] Preferably, the oil cylinder filling device also includes an alarm, which is electrically connected to the liquid level measuring element 7. When the actual liquid level is lower than the target liquid level, the alarm generates an alarm response to remind the operator to promptly detect the abnormal oil filling situation of the oil cylinder 2, so as to avoid problems such as accelerated wear of the oil cylinder 2, unstable operation of the equipment or even damage due to insufficient oil, and ensure the normal operation of the oil cylinder 2 and related equipment, and reduce downtime and maintenance costs caused by equipment failure.

[0061] Alarms can be activated by sounding an alarm or flashing a warning light. The appropriate alarm can be selected based on actual needs, and will not be elaborated on here.

[0062] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder oil injection device, characterized in that, include: Oil storage tank (1), used to hold hydraulic oil; An oil supply pipe (3) is provided, one end of which is connected to the oil storage tank (1), and the other end is provided with an oil injection nozzle (4). The oil injection nozzle (4) is detachably connected to the oil cylinder (2). A locking member (5) is provided at the connection between the oil injection nozzle (4) and the oil cylinder (2). The locking member (5) is used to lock the oil injection nozzle (4). A power pump (6) is installed on the oil supply pipe (3) to transport the hydraulic oil in the oil storage tank (1) to the oil cylinder (2) through the oil supply pipe (3); The liquid level measuring device (7) is electrically connected to the power pump (6). The liquid level measuring device (7) is used to measure the actual liquid level of the hydraulic oil in the oil cylinder (2) and control the operation of the power pump (6) based on the actual liquid level.

2. The oil injection device for the hydraulic cylinder according to claim 1, characterized in that, A filter (8) is provided on the oil pipeline (3) for filtering the hydraulic oil in the oil pipeline (3).

3. The oil injection device for the hydraulic cylinder according to claim 1, characterized in that, The oil pipeline (3) includes multiple pipeline segments, which are connected end to end in sequence and are detachable, and the length of at least some of the pipeline segments is adjustable.

4. The oil injection device for the hydraulic cylinder according to claim 3, characterized in that, A seal is provided at the connection between two adjacent pipe sections.

5. The oil injection device for the hydraulic cylinder according to claim 1, characterized in that, The oil nozzle (4) extends inward at an angle close to the oil cylinder (2) to form an inverted cone-shaped oil injection channel.

6. The oil injection device for the hydraulic cylinder according to claim 1, characterized in that, A one-way check valve is installed on the oil pipeline (3).

7. The oil injection device for the hydraulic cylinder according to claim 1, characterized in that, The oil cylinder injection device also includes an alarm, which is electrically connected to the liquid level measuring element (7). When the actual liquid level value is lower than the target liquid level value, the alarm generates an alarm response.

8. The oil injection device for the hydraulic cylinder according to claim 1, characterized in that, The locking member (5) is a locking ring, which is located at the inlet of the oil cylinder (2). The locking ring has a connecting channel inside for connecting the oil cylinder (2). A limiting protrusion is formed on a portion of the inner wall of the connecting channel. A positioning groove is correspondingly provided on a portion of the outer wall of the oil nozzle (4). The oil nozzle (4) can extend into the connecting channel to connect the oil pipe (3) and the oil cylinder (2). The locking ring can rotate around its own circumference. When the limiting protrusion is aligned with the positioning groove, the oil nozzle (4) can move along the axial direction of the connecting channel. When the limiting protrusion deviates from the positioning groove, the limiting protrusion can restrict the movement of the oil nozzle (4) relative to the connecting channel.

9. The oil injection device for the hydraulic cylinder according to claim 1, characterized in that, The outer wall of the oil storage tank (1) is provided with a handle, and the bottom of the oil storage tank (1) is provided with casters.

10. The oil injection device for a hydraulic cylinder according to claim 1, characterized in that, The oil storage tank (1) has a transparent observation window on its side wall, and the surface of the transparent observation window has scale lines.

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