Electric-hydraulic Brinell hardness testing head and portable electric-hydraulic Brinell hardness tester

An electric-hydraulic Brinell hardness testing head, comprising a check valve, a pressure regulating valve, an oil drain valve, an oil cylinder, a ball indenter, and a hydraulic integrated block, wherein a controller, a battery pack, and a motor are mounted on the hydraulic integrated block;

• the controller is electrically connected with the motor and the battery pack, respectively;
• an electric plunger pump body mounting hole and a check valve mounting hole are formed on the hydraulic integrated block, an electric plunger pump is mounted in the electric plunger pump body mounting hole, a cartridge valve seat is mounted in the check valve mounting hole, the check valve is mounted in the cartridge valve seat, one end of the electric plunger pump communicates with a low-pressure cavity, another end of the electric plunger pump communicates with a high-pressure cavity through the check valve, and the motor is connected with the electric plunger pump;
• wherein a first horizontal oil passage, a second horizontal oil passage, a third horizontal oil passage, a fourth horizontal oil passage, a fifth horizontal oil passage, a sixth horizontal oil passage, a seventh horizontal oil passage, a first vertical oil passage, a second vertical oil passage, a third vertical oil passage, a fourth vertical oil passage, a first inclined oil passage, a second inclined oil passage and a third inclined oil passage are arranged in the hydraulic integrated block;
• wherein an oil outlet is formed at a bottom of the electric plunger pump body mounting hole, an L-shaped oil passage is arranged in the cartridge valve seat, two ends of the L-shaped oil passage respectively communicate with the oil outlet and the check valve, one end of the first horizontal oil passage communicates with the check valve, another end of the first horizontal oil passage communicates with the second horizontal oil passage, the second horizontal oil passage communicates with the third vertical oil passage, the third vertical oil passage communicates with the high-pressure cavity through the first inclined oil passage, the low-pressure cavity communicates with one end of the seventh horizontal oil passage, another end of the seventh horizontal oil passage communicates with the fourth horizontal oil passage, the fourth horizontal oil passage communicates with the fifth horizontal oil passage, and another end of the fifth horizontal oil passage communicates with an oil inlet cavity.