A new overpressure protection device for hydraulic pumps

Abstract

The utility model discloses a novel overpressure protection device for hydraulic pump relates to overpressure protection technical field, including main cavity, the spring fixed block, spring, spring sliding block and special-shaped connector are arranged from left to right in the inside of main cavity, the spring fixed block is fixed in the inside left end of main cavity, the both sides of spring are connected with spring fixed block and spring sliding block, special-shaped connector with the right end outside of main cavity is connected, be provided with displacement sensor on spring sliding block, be provided with pressure sensor on the inner wall of main cavity in the right upper side of displacement sensor, the cavity wall below main cavity is set up as telescopic cavity wall, the utility model discloses a novel overpressure protection device for hydraulic pump above, has improved the problem of existing overpressure protection in intelligent, initiative, high accuracy etc.

Description

Technical Field

[0001] This utility model relates to the field of overpressure protection technology, and in particular to a novel overpressure protection device for hydraulic pumps. Background Technology

[0002] To prevent the hazards caused by overpressure, the commonly used safety protection measure in existing technology is to install relief valves or safety valves. These valves are typical passive, mechanical protection devices. Although these traditional safety valves have played an important role in industrial applications, their inherent technical defects and limitations are becoming increasingly prominent. Traditional safety valves can only operate after the pressure has reached or exceeded their set threshold, which is a kind of "post-event remedial" protection. For hydraulic shocks with extremely rapid pressure rise, the valve's response speed may not be able to keep up with the rate of pressure change, resulting in the system pressure briefly exceeding the safety limit at the moment the valve opens, causing shock or damage to the system. They are limited to releasing pressure when overpressure occurs and do not have monitoring, diagnosis, early warning, or communication capabilities. Operators cannot obtain real-time dynamic data on system pressure, nor can they predict potential failure risks. Once the system experiences overpressure, the cause can only be traced through the phenomena after the accident, making it impossible to prevent problems in advance and lacking initiative and flexibility. Utility Model Content

[0003] The purpose of this invention is to provide a novel overpressure protection device for hydraulic pumps, which improves upon existing overpressure protection devices in terms of intelligence, proactiveness, and high precision, and is capable of predicting, preventing, and proactively intervening in pressure anomalies.

[0004] To achieve the above objectives, this utility model provides a novel overpressure protection device for a hydraulic pump, comprising a main cavity. Inside the main cavity, from left to right, are arranged a spring fixing block, a spring, a spring sliding block, and a shaped connector. The spring fixing block is fixed to the left end inside the main cavity. The two sides of the spring are connected to the spring fixing block and the spring sliding block. The shaped connector is connected to the outside of the right end of the main cavity. A displacement sensor is installed on the spring sliding block. A pressure sensor is installed on the inner wall of the main cavity above and to the right of the displacement sensor. The lower cavity wall of the main cavity is configured as a retractable cavity wall.

[0005] Preferably, the retractable cavity wall includes a motor drive box, one end of which is connected to the main cavity, and the other end of which is connected to one end of a sliding wall, the other end of which is connected to a shaped connector.

[0006] Preferably, the motor transmission box includes a motor, the output end of the motor is connected to a transmission gear set, the transmission gear set is connected to a fixed rod, the fixed rod is connected to a telescopic rod and a clutch and a brake are provided at the connection between the two, the output end of the telescopic rod is provided with an external connector, and the external connector is connected to the sliding wall.

[0007] Preferably, a microprocessor is disposed outside the main cavity, and the microprocessor is electrically connected to the displacement sensor, the pressure sensor and the motor.

[0008] Preferably, the irregularly shaped connector is provided with a cavity connecting frame and a flange connecting plate. The cavity connecting frame is provided with a groove at the position corresponding to the telescopic cavity wall, and a sealing gasket is adhered in the groove.

[0009] Preferably, the displacement sensor is configured as a rod-type linear displacement sensor or a magnetostrictive displacement sensor.

[0010] Therefore, the novel overpressure protection device for hydraulic pumps with the above-described structure has the following advantages compared with the prior art: 1. This utility model provides precise position control and rapid response capability. The microprocessor can precisely control the sliding wall to perform adjustable pressure relief based on the feedback from the pressure sensor and displacement sensor, so that the pressure is stabilized near an ideal set value. It changes from passive pressure relief to active suppression, fundamentally preventing pressure over-limit. It also has early warning and redundancy functions, providing multiple guarantees for system safety. 2. The device features a compact structure and high integration. It integrates pressure sensing, buffering, displacement measurement, and actuators into the interior and exterior of a single main chamber, making the entire device compact, easy to install and maintain, reducing external pipelines and connection points, and lowering the potential leakage risk in other locations.

[0011] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0012] Figure 1 This is an overall structural diagram of an embodiment of a novel overpressure protection device for a hydraulic pump according to the present invention; Figure 2 This is a diagram of the motor drive structure of an embodiment of a novel overpressure protection device for a hydraulic pump according to the present invention; Figure Labels 1. Main cavity; 2. Spring fixing block; 3. Spring; 4. Spring sliding block; 5. Irregular connector; 51. Cavity connecting frame; 52. Flange connecting plate; 53. Groove; 54. Sealing gasket; 6. Displacement sensor; 7. Pressure sensor; 8. Telescopic cavity wall; 81. Motor transmission box; 82. Sliding wall; 811. Motor; 812. Transmission gear set; 813. Fixing rod; 814. Telescopic rod; 815. Clutch; 816. Brake; 817. External connector; 9. Microprocessor. Detailed Implementation

[0013] Example In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0014] like Figures 1-2 As shown, this utility model discloses a novel overpressure protection device for a hydraulic pump, comprising a main cavity 1. Inside the main cavity 1, from left to right, are arranged a spring fixing block 2, a spring 3, a spring sliding block, and a shaped connector 5. The spring fixing block 2 is fixed to the left end inside the main cavity 1. The two sides of the spring 3 are connected to the spring fixing block 2 and the spring sliding block. The shaped connector 5 is connected to the outside of the right end of the main cavity 1. A displacement sensor 6 is installed on the spring sliding block. A pressure sensor 7 is installed on the inner wall of the main cavity 1 above and to the right of the displacement sensor 6. The lower cavity wall of the main cavity 1 is configured as a retractable cavity wall 8. Two sensors based on different principles (indirect measurement and direct measurement) are used to monitor the same physical quantity (pressure), forming data redundancy and cross-validation. A microprocessor 9 can simultaneously receive two signals for comparison and calibration. If one sensor malfunctions or its data deviates, the system can make a judgment based on the data from the other sensor or directly trigger an alarm, greatly improving the accuracy of monitoring and the reliability of the system, and avoiding misjudgments or protection failures caused by the failure of a single sensor.

[0015] The retractable cavity wall 8 includes a motor drive box 81, one end of which is connected to the main cavity 1, and the other end of which is connected to one end of a sliding wall 82. The other end of the sliding wall 82 is connected to the irregular connector 5.

[0016] The motor transmission box 81 includes a motor 811, the output end of the motor 811 is connected to a transmission gear set 812, the transmission gear set 812 is connected to a fixed rod 813, the fixed rod 813 is connected to a telescopic rod 814, and a clutch 815 and a brake 816 are provided at the connection between the two. The output end of the telescopic rod 814 is provided with an external connector 817, and the external connector 817 is connected to the sliding wall 82.

[0017] A microprocessor 9 is installed outside the main cavity 1. The microprocessor 9 is electrically connected to the displacement sensor 6, the pressure sensor 7 and the motor 811.

[0018] The irregular connector 5 is provided with a cavity connecting frame 51 and a flange connecting plate 52. The cavity connecting frame 51 is provided with a groove 53 at the position corresponding to the telescopic cavity wall 8, and a sealing gasket 54 is adhered in the groove 53.

[0019] When a hydraulic pump starts or stops, the system pressure will fluctuate drastically. This device can be used to increase the volume in advance (during startup) or decrease the volume slowly (during shutdown) to effectively absorb pressure shocks, achieve soft start and soft stop, protect the pump, valve and pipeline system, and extend the equipment life.

[0020] Displacement sensor 6 is configured as a rod-type linear displacement sensor or a magnetostrictive displacement sensor.

[0021] In the specific implementation process, after the liquid enters the main cavity, the hydraulic action causes the spring sliding block to move to the left. At this time, the displacement sensor and pressure sensor collect signals and input the collected signals into the microprocessor. The microprocessor controls the motor to run according to the signals. The motor causes the sliding wall to slide to the left through the transmission mechanism to release pressure. After the pressure drops, the microprocessor controls the sliding wall to return to its original position through the motor.

[0022] Therefore, this utility model provides a novel overpressure protection device for hydraulic pumps with the above-mentioned structure, which improves the existing overpressure protection in terms of intelligence, initiative, and high precision. It can predict, prevent, and actively intervene in pressure anomalies. Through precise control of the sliding wall by the motor, it can perform adjustable pressure relief, so that the pressure is stabilized near an ideal set value. It changes from passive pressure relief to active suppression, fundamentally preventing pressure over-limit. It also has early warning and redundancy functions, providing multiple guarantees for system safety.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A novel overpressure protection device for hydraulic pumps, characterized in that: The device includes a main cavity, inside which, from left to right, are arranged a spring fixing block, a spring, a spring sliding block, and a shaped connector. The spring fixing block is fixed to the left end inside the main cavity. The two sides of the spring are connected to the spring fixing block and the spring sliding block. The shaped connector is connected to the outside of the right end of the main cavity. A displacement sensor is provided on the spring sliding block. A pressure sensor is provided on the inner wall of the main cavity above and to the right of the displacement sensor. The lower cavity wall of the main cavity is configured as a retractable cavity wall.

2. A novel overpressure protection device for a hydraulic pump according to claim 1, characterized in that: The retractable cavity wall includes a motor drive box, one end of which is connected to the main cavity, and the other end of which is connected to one end of a sliding wall, the other end of which is connected to a shaped connector.

3. A novel overpressure protection device for a hydraulic pump according to claim 2, characterized in that: The motor transmission box includes a motor, the output end of which is connected to a transmission gear set, the transmission gear set is connected to a fixed rod, the fixed rod is connected to a telescopic rod, and a clutch and a brake are provided at the connection between the two. The output end of the telescopic rod is provided with an external connector, and the external connector is connected to the sliding wall.

4. A novel overpressure protection device for a hydraulic pump according to claim 3, characterized in that: A microprocessor is disposed outside the main cavity, and the microprocessor is electrically connected to the displacement sensor, the pressure sensor and the motor.

5. A novel overpressure protection device for a hydraulic pump according to claim 4, characterized in that: The irregular connector is provided with a cavity connecting frame and a flange connecting plate. The cavity connecting frame is provided with a groove at the position corresponding to the telescopic cavity wall, and a sealing gasket is adhered in the groove.

6. A novel overpressure protection device for a hydraulic pump according to claim 5, characterized in that: The displacement sensor is configured as a rod-type linear displacement sensor or a magnetostrictive displacement sensor.

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