Pressure relief state detection device for hydraulic tool

Abstract

The utility model relates to the technical field of hydraulic tool pressure relief state detection, and discloses a hydraulic tool pressure relief state detection device which comprises a main body mechanism and a supporting mechanism located on the lower side of the main body mechanism. The main body mechanism comprises a hydraulic tool body, a motor, a supporting column, a pressure relief state detection device main body, a touch display screen and an MCU single chip microcomputer, the motor is fixedly installed at the right end of the hydraulic tool body, the supporting column is fixedly installed at the upper end of the hydraulic tool body, and the pressure relief state detection device main body is fixedly installed at the upper end of the supporting column; the touch display screen is fixedly arranged at the front end of the pressure relief state detection device body, whether the pressure relief valve is opened or not is judged by sampling the working current value of the motor, and whether the pressure relief valve is opened or not is judged by analyzing the change of the current of the motor according to the characteristic that the larger the pressure of the hydraulic tool is, the larger the load of the motor is. The mechanical strength of the cylinder body cannot be damaged by the device, and the risk of oil leakage is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic tool pressure relief state detection, in particular to a hydraulic tool pressure relief state detection device. Background Art

[0002] When electric hydraulic tools are working, the hydraulic pressure will gradually increase from low pressure until it reaches the rated pressure, then the mechanical pressure relief valve will be opened. After the pressure relief valve opens, the hydraulic oil will flow back and the pressure will drop quickly. Considering safety and user experience, the MCU should be able to stop the motor when the pressure relief valve is opened.

[0003] The existing practice is to place a pressure sensor in the tool cavity to detect pressure changes. When the pressure drops from high pressure to a very low pressure in a short period of time, it can be determined that the pressure relief valve is opened. The application environment of small volume and high pressure has extremely high requirements for pressure sensors. The corresponding pressure sensors are very expensive, and the installation of the sensor requires drilling holes in the cavity, which can easily damage the mechanical strength of the cylinder and cause oil leakage risks. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The utility model aims to provide a hydraulic tool pressure relief state detection device to solve the problems of damaging the mechanical strength of the cylinder body and introducing the risk of oil leakage in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydraulic tool pressure relief state detection device, comprising a main body mechanism and a support mechanism, wherein the support mechanism is located at the lower side of the main body mechanism, and the main body mechanism comprises a hydraulic tool body, a motor, a support column, a pressure relief state detection device body, a touch display screen and an MCU single chip computer, wherein the motor is fixedly mounted on the right end of the hydraulic tool body, the support column is fixedly mounted on the upper end of the hydraulic tool body, the pressure relief state detection device body is fixedly mounted on the upper end of the support column, the touch display screen is fixedly arranged at the front end of the pressure relief state detection device body, and the MCU single chip computer is fixedly arranged inside the pressure relief state detection device body.

[0008] Preferably, the main body structure also includes a battery, a first MOS tube, a second MOS tube, a sampling resistor, a controller, a temperature sensor, a perforated heat sink, a fixed support plate and a cooling fan. The battery is fixedly arranged inside the main body of the pressure relief state detection device, and the main body of the pressure relief state detection device is electrically connected to the motor.

[0009] Preferably, the first MOS tube is fixedly installed inside the main body of the pressure relief state detection device, the second MOS tube is fixedly installed inside the main body of the pressure relief state detection device, and the sampling resistor is fixedly installed inside the main body of the pressure relief state detection device.

[0010] Preferably, the controller is fixedly installed inside the main body of the pressure relief state detection device, the temperature sensor is fixedly installed at the right end of the controller, the heat dissipation plate with holes is fixedly installed on the right side of the temperature sensor, the fixed support plate is fixedly installed at the rear end inside the main body of the pressure relief state detection device, the cooling fan is fixedly installed at the upper end of the fixed support plate, and the controller is electrically connected to the temperature sensor and the cooling fan.

[0011] Preferably, the support mechanism comprises a first fixed arc plate, a first support column, a first anti-slip pad, a second fixed arc plate, a second support column and a second anti-slip pad, and the first fixed arc plate is fixedly mounted on the lower end of the hydraulic tool body.

[0012] Preferably, the first supporting column is fixedly mounted on the lower end of the first fixed arc-shaped plate, and the first anti-slip pad is fixedly mounted on the lower end of the first supporting column.

[0013] Preferably, the second fixed arc plate is fixedly mounted on the lower end of the hydraulic tool body, the second supporting column is fixedly mounted on the lower end of the second fixed arc plate, and the second anti-slip pad is fixedly mounted on the lower end of the second supporting column.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The hydraulic tool pressure relief state detection device determines whether the pressure relief valve is open by sampling the motor working current value. The characteristic that the greater the pressure of the hydraulic tool, the greater the motor load, is used to analyze the change in the motor current to determine whether the pressure relief valve is open. The scheme has a simple circuit, no redundant sensors and connecting wires, and no need to modify the mechanical structure. It has very good economy and flexibility, and can prevent the device from destroying the mechanical strength of the cylinder body, reducing the risk of introducing oil leakage;

[0016] 2. The hydraulic tool pressure relief state detection device has a first anti-skid pad installed at the lower end of the first supporting column, and a second anti-skid pad installed at the lower end of the second supporting column, which can make the device more stable and have better anti-skid performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the main cross-sectional structure of the pressure relief state detection device of the utility model;

[0019] Figure 3 The structure of the pressure relief state detection algorithm of the utility model is shown as follows Figure 1 ;

[0020] Figure 4 The structure of the pressure relief state detection algorithm of the utility model is shown as follows Figure 2 ;

[0021] Figure 5 The structure of the pressure relief state detection algorithm of the utility model is shown as follows Figure 3 ;

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the second fixed arc plate of the utility model.

[0023] In the figure: 1. Main body; 101. Hydraulic tool body; 102. Motor; 103. Support column; 104. Pressure relief state detection device body; 105. Touch screen; 106. MCU single chip; 107. Battery; 108. First MOS tube; 109. Second MOS tube; 110. Sampling resistor; 111. Controller; 112. Temperature sensor; 113. Heat sink with holes; 114. Fixed support plate; 115. Cooling fan; 2. Support mechanism; 201. First fixed arc plate; 202. First support column; 203. First anti-slip pad; 204. Second fixed arc plate; 205. Second support column; 206. Second anti-slip pad. 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 in 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 Figure 1 - Figure 6The utility model provides a technical solution: a hydraulic tool pressure relief state detection device, including a main mechanism 1 and a support mechanism 2, the support mechanism 2 is located at the lower side of the main mechanism 1, the main mechanism 1 includes a hydraulic tool body 101, a motor 102, a support column 103, a pressure relief state detection device body 104, a touch display screen 105 and an MCU single chip 106, the motor 102 is fixedly installed at the right end of the hydraulic tool body 101, the support column 103 is fixedly installed at the upper end of the hydraulic tool body 101, the pressure relief state detection device body 104 is fixedly installed at the upper end of the support column 103, the touch display screen 105 is fixedly set at the front end of the pressure relief state detection device body 104, and the MCU single chip 106 is fixedly set inside the pressure relief state detection device body 104.

[0026] The main mechanism 1 also includes a battery 107, a first MOS tube 108, a second MOS tube 109, a sampling resistor 110, a controller 111, a temperature sensor 112, a perforated heat sink 113, a fixed support plate 114 and a cooling fan 115. The battery 107 is fixedly arranged inside the pressure relief state detection device body 104, the pressure relief state detection device body 104 is electrically connected to the motor 102, the first MOS tube 108 is fixedly installed inside the pressure relief state detection device body 104, the second MOS tube 109 is fixedly installed inside the pressure relief state detection device body 104, the sampling resistor 110 is fixedly installed inside the pressure relief state detection device body 104, and the temperature sensor 112 is fixedly installed inside the pressure relief state detection device body 104. 0 is fixedly installed inside the pressure relief state detection device body 104, the controller 111 is fixedly installed inside the pressure relief state detection device body 104, the temperature sensor 112 is fixedly installed on the right end of the controller 111, the perforated heat dissipation plate 113 is fixedly installed on the right side of the temperature sensor 112, the fixed support plate 114 is fixedly installed at the rear end inside the pressure relief state detection device body 104, the heat dissipation fan 115 is fixedly installed on the upper end of the fixed support plate 114, the controller 111 is electrically connected to the temperature sensor 112 and the heat dissipation fan 115, when the hydraulic tool pressure relief state detection device needs to be used, the temperature sensor 112 and the heat dissipation fan 115 are fixedly installed on the right side of the temperature sensor 112, the fixed support plate 114 is fixedly installed at the rear end inside the pressure relief state detection device body 104, the heat dissipation fan 115 is fixedly installed on the upper end of the fixed support plate 114, the controller 111 is electrically connected to the temperature sensor 112 and the heat dissipation fan 115, and when the hydraulic tool pressure relief state detection device needs to be used, the temperature sensor 112 and the heat dissipation fan 115 are fixedly installed on the right side of the temperature sensor 112. The CU single chip computer 106 controls the switches of the first MOS tube (Q1) and the second MOS tube (Q2) to realize the rotation and braking action of the motor 102. When the first MOS tube (Q1) and the second MOS tube (Q2) are both disconnected, the motor 102 does not work; when the first MOS tube (Q1) is turned on and the second MOS tube (Q2) is disconnected, the motor 102 rotates; when the first MOS tube (Q1) is disconnected and the second MOS tube (Q2) is connected, the motor 102 can be quickly braked. The sampling resistor 110 is used to sample the working current of the motor 102 and analyze the current in real time. The load condition of the motor 102 is that during the operation of the tool, the pressure gradually increases, and the corresponding current of the motor 102 will also gradually increase; when the rated pressure is reached, the pressure relief valve is opened, the pressure will drop rapidly in a short time, and the corresponding current of the motor 102 will also drop rapidly in a short time. After the MCU 106 detects the current drop signal, it turns off the first MOS tube (Q1) and turns on the second MOS tube (Q2) to achieve rapid braking of the motor. The circuit of this solution is simple, without any redundant sensors and connecting wires, and does not require any modification to the mechanical structure, and has very good economy and flexibility.

[0027] The supporting mechanism 2 includes a first fixed arc plate 201, a first supporting column 202, a first anti-skid pad 203, a second fixed arc plate 204, a second supporting column 205 and a second anti-skid pad 206. The first fixed arc plate 201 is fixedly installed at the lower end of the hydraulic tool body 101, the first supporting column 202 is fixedly installed at the lower end of the first fixed arc plate 201, the first anti-skid pad 203 is fixedly installed at the lower end of the first supporting column 202, the second fixed arc plate 204 is fixedly installed at the lower end of the hydraulic tool body 101, the second supporting column 205 is fixedly installed at the lower end of the second fixed arc plate 204, the second anti-skid pad 206 is fixedly installed at the lower end of the second supporting column 205, the first anti-skid pad 203 is installed at the lower end of the first supporting column 202, and the second anti-skid pad 206 is installed at the lower end of the second supporting column 205, which can make the device more stable and have better anti-skid performance.

[0028] Working principle: When the hydraulic tool pressure relief state detection device needs to be used, the MCU single chip computer 106 controls the switches of the first MOS tube (Q1) and the second MOS tube (Q2) to realize the rotation and braking action of the motor 102. When the first MOS tube (Q1) and the second MOS tube (Q2) are both disconnected, the motor 102 does not work; when the first MOS tube (Q1) is turned on and the second MOS tube (Q2) is disconnected, the motor 102 rotates; when the first MOS tube (Q1) is disconnected and the second MOS tube (Q2) is connected, the motor 102 can be quickly braked. The sampling resistor 110 is used to sample the working current of the motor 102 and analyze the load condition of the motor 102 in real time. During the operation of the tool, the pressure The pressure gradually increases, and the corresponding current of the motor 102 also gradually increases; when the rated pressure is reached, the pressure relief valve is opened, the pressure will drop rapidly in a short time, and the corresponding current of the motor 102 will also drop rapidly in a short time. After the MCU 106 detects the current drop signal, it turns off the first MOS tube (Q1) and turns on the second MOS tube (Q2) to achieve rapid braking of the motor. The circuit of this solution is simple, without any redundant sensors and connecting wires, and does not require any modification to the mechanical structure. It has very good economy and flexibility. The first anti-skid pad 203 is installed at the lower end of the first supporting column 202, and the second anti-skid pad 206 is installed at the lower end of the second supporting column 205, which can make the device more stable and have better anti-skid performance.

[0029] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A hydraulic tool pressure relief state detection device, comprising a main body mechanism (1) and a support mechanism (2), characterized in that: The support mechanism (2) is located at the lower side of the main mechanism (1); the main mechanism (1) comprises a hydraulic tool body (101), a motor (102), a support column (103), a pressure relief state detection device body (104), a touch screen (105) and an MCU single chip computer (106); the motor (102) is fixedly mounted on the right end of the hydraulic tool body (101); the support column (103) is fixedly mounted on the upper end of the hydraulic tool body (101); the pressure relief state detection device body (104) is fixedly mounted on the upper end of the support column (103); the touch screen (105) is fixedly mounted at the front end of the pressure relief state detection device body (104); and the MCU single chip computer (106) is fixedly mounted inside the pressure relief state detection device body (104).

2. A hydraulic tool pressure relief state detection device according to claim 1, characterized in that: The main body mechanism (1) further comprises a storage battery (107), a first MOS tube (108), a second MOS tube (109), a sampling resistor (110), a controller (111), a temperature sensor (112), a perforated heat sink (113), a fixed support plate (114) and a heat dissipation fan (115); the storage battery (107) is fixedly arranged inside the pressure relief state detection device main body (104); and the pressure relief state detection device main body (104) is electrically connected to the motor (102).

3. A hydraulic tool pressure relief state detection device according to claim 2, characterized in that: The first MOS transistor (108) is fixedly installed inside the pressure relief state detection device body (104), the second MOS transistor (109) is fixedly installed inside the pressure relief state detection device body (104), and the sampling resistor (110) is fixedly installed inside the pressure relief state detection device body (104).

4. A hydraulic tool pressure relief state detection device according to claim 3, characterized in that: The controller (111) is fixedly mounted inside the main body (104) of the pressure relief state detection device; the temperature sensor (112) is fixedly mounted at the right end of the controller (111); the perforated heat dissipation plate (113) is fixedly mounted on the right side of the temperature sensor (112); the fixed support plate (114) is fixedly mounted at the rear end inside the main body (104) of the pressure relief state detection device; the heat dissipation fan (115) is fixedly mounted at the upper end of the fixed support plate (114); and the controller (111) is electrically connected to the temperature sensor (112) and the heat dissipation fan (115).

5. A hydraulic tool pressure relief state detection device according to claim 4, characterized in that: The support mechanism (2) comprises a first fixed arc plate (201), a first support column (202), a first anti-slip pad (203), a second fixed arc plate (204), a second support column (205) and a second anti-slip pad (206); the first fixed arc plate (201) is fixedly mounted on the lower end of the hydraulic tool body (101).

6. A hydraulic tool pressure relief state detection device according to claim 5, characterized in that: The first supporting column (202) is fixedly mounted on the lower end of the first fixed arc-shaped plate (201), and the first anti-slip pad (203) is fixedly mounted on the lower end of the first supporting column (202).

7. A hydraulic tool pressure relief state detection device according to claim 6, characterized in that: The second fixed arc plate (204) is fixedly mounted on the lower end of the hydraulic tool body (101), the second supporting column (205) is fixedly mounted on the lower end of the second fixed arc plate (204), and the second anti-slip pad (206) is fixedly mounted on the lower end of the second supporting column (205).

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