Hydraulic stretcher

Abstract

The utility model discloses a hydraulic stretcher which comprises a machine body, a hydraulic pump station, a plunger pump, a gear pump, a motor, a manual hydraulic pump, a hydraulic cylinder, a piston rod, a first clamping mechanism, a second clamping mechanism and an electric box, the hydraulic pump station is arranged on one side of the machine body, and the plunger pump and the gear pump are arranged in the hydraulic pump station. Two motors used for driving the plunger pump and the gear pump to work are arranged on the outer upper portion of the hydraulic pump station, a manual hydraulic pump is arranged on one side of the outer upper portion of the hydraulic pump station, and the plunger pump, the gear pump and the manual hydraulic pump suck hydraulic oil in the hydraulic pump station through oil suction pipelines. The plunger pump, the gear pump and the manual hydraulic pump are all connected with the hydraulic cylinder through oil outlet pipelines, the hydraulic cylinder is installed below the machine body, a piston rod is movably arranged in the hydraulic cylinder, and the hydraulic stretching machine has the advantages of being suitable for workpieces of different sizes, long in stretching stroke and high in stretching speed.

Description

Technical Field

[0001] This utility model relates to the technical field of stretching machines, and in particular to the technical field of a hydraulic stretching machine. Background Technology

[0002] A tensile testing machine is an instrument used to test the tensile strength and plastic deformation capacity of materials. It is also known as a material tensile testing machine. It can perform mechanical property tests on various materials such as metals, plastics, and rubber. It is widely used in materials engineering, mechanical engineering, aerospace engineering and other fields. The method is to clamp the specimen on the tensile testing machine and gradually increase the length of the specimen under a certain load until it can no longer resist failure.

[0003] Currently, traditional hydraulic stretching machines perform stretching and shaping of workpieces independently, resulting in low work efficiency. In addition, the oil tank and electrical box of the hydraulic stretching machine are set up separately, making the hydraulic stretching machine occupy a large space and have a non-compact structure.

[0004] To address the problems mentioned in the background art, for example, application number CN201220410519.3 discloses a hydraulic stretching machine, including a main oil cylinder, a column, a top plate, a sliding plate, and a worktable arranged sequentially from top to bottom. The top plate and worktable are fixedly installed, the sliding plate is slidably installed along the column, the main oil cylinder is fixedly installed on the top of the top plate, and the sliding plate is pushed up and down by the main oil cylinder. The hydraulic stretching machine is characterized by further including upper and lower mounting plates. The upper mounting plate is fixed to the bottom of the sliding plate and fixes the upper mold of the stretching die and the upper mold of the shaping die. The lower mounting plate is fixed to the table surface of the worktable and fixes the upper mold of the stretching die and the upper mold of the shaping die. The lower die of the forming die is equipped with upper and lower mounting plates. The upper mounting plate is used to fix the upper dies of the stretching die and the shaping die, while the lower mounting plate is used to fix the lower dies of the stretching die and the shaping die. In this way, when the upper mounting plate is fixed at the bottom of the slide plate and the lower mounting plate is fixed on the table surface, the stretching machine can simultaneously stretch and shape the workpiece, improving work efficiency. The oil tank of the hydraulic stretching machine is set close to the side of the base of the hydraulic stretching machine, and the two are integrated into one structure. The electrical box of the hydraulic stretching machine is fixedly installed on the top of the oil tank. The above design makes the hydraulic stretching machine simple and compact in structure and occupies little space. However, this structure still has the following defects:

[0005] The stretching machine has a simple structure and specifications, a short stretching stroke, and a slow speed, which seriously affects work efficiency. Summary of the Invention

[0006] The purpose of this invention is to solve the problems in the prior art and to propose a hydraulic stretching machine that is applicable to workpieces of various sizes, with a longer stretching stroke and faster speed.

[0007] To achieve the above objectives, this utility model proposes a hydraulic stretching machine, comprising a machine body, a hydraulic pump station, a plunger pump, a gear pump, a motor, a manual hydraulic pump, a hydraulic cylinder, a piston rod, a first clamping mechanism, a second clamping mechanism, and an electrical box. The hydraulic pump station is located on one side of the machine body, and the plunger pump and gear pump are installed inside the hydraulic pump station. Two motors for driving the plunger pump and gear pump are located on the upper outer side of the hydraulic pump station. A manual hydraulic pump is located on one side of the upper outer side of the hydraulic pump station. The plunger pump, gear pump, and manual hydraulic pump all draw hydraulic oil from the hydraulic pump station through suction pipes. The plunger pump, gear pump, and manual hydraulic pump are all connected to the hydraulic cylinder through outlet pipes. The hydraulic cylinder is installed below the machine body, and a piston rod is movable inside the hydraulic cylinder. The end of the piston rod is provided with a first clamping mechanism. A second clamping mechanism that cooperates with the first clamping mechanism is fixedly installed on one side of the lower part of the machine body. An electrical box is also located on the outer wall of the hydraulic pump station, and the motor, the first clamping mechanism, and the second clamping mechanism are all electrically connected to the electrical box.

[0008] Preferably, the oil outlet of the plunger pump is equipped with an ultra-high pressure relief valve and a first pressure gauge, and the ultra-high pressure relief valve is electrically connected to the electrical box.

[0009] Preferably, the oil outlet end of the gear pump is equipped with an overflow valve, a two-way hydraulic check valve, and a solenoid directional valve in sequence, and the overflow valve, the two-way hydraulic check valve, and the solenoid directional valve are all electrically connected to the electrical box.

[0010] Preferably, the oil outlet of the manual hydraulic pump is equipped with an ultra-high pressure check valve and a second pressure gauge, and the ultra-high pressure check valve is electrically connected to the electrical box.

[0011] Preferably, the outer surface of the hydraulic pump station is equipped with a level and temperature gauge for measuring and displaying the hydraulic oil level and temperature, and the hydraulic pump station is equipped with an air filter, which is electrically connected to the electrical box.

[0012] Preferably, the hydraulic cylinder is equipped with a tension sensor, which is electrically connected to the electrical box.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model, through the coordinated use of a plunger pump, gear pump, motor, manual hydraulic pump, hydraulic cylinder, piston rod, first clamping mechanism, and second clamping mechanism, can improve work efficiency. First, the material to be stretched is fixed by the first and second clamping mechanisms. Then, the motor is started through the electrical box, and the motor drives the plunger pump and gear pump to draw in oil. The hydraulic oil is then delivered to the hydraulic cylinder through the oil outlet pipe. At this time, the hydraulic oil pushes the piston rod inside the hydraulic cylinder to move, causing the piston rod to stretch the material to be stretched backward. When the material is stretched to a certain extent, the continuous operation of the plunger pump and gear pump will generate a large amount of electrical energy consumption, which greatly increases the cost and is not conducive to continuous use. The plunger pump and gear pump can then be shut down, and the operator can manually operate the manual hydraulic pump to deliver hydraulic oil to the hydraulic cylinder, which can increase the pressure in the hydraulic cylinder again, thereby accelerating the stretching speed. At the same time, the stretching stroke is longer, the cost is lower, and the work efficiency is higher. This solves the problem that the stretching machine has a single structural specification, a short stretching stroke, and a slow speed, which seriously affects the work efficiency.

[0015] 2. This utility model incorporates a liquid level and temperature gauge and an air filter. The liquid level and temperature gauge can display the hydraulic oil level in real time and uses the thermal expansion and contraction properties of a bimetallic strip to measure the hydraulic oil temperature. The air filter can filter out impurities such as dust, sand, and suspended particles in the air, which can reduce premature wear of the piston rod and extend the service life of the hydraulic cylinder. Attached Figure Description

[0016] Figure 1 This is a front view of a hydraulic stretching machine according to this utility model;

[0017] Figure 2 This is a schematic diagram of the first pressure representation of a hydraulic stretching machine according to this utility model;

[0018] Figure 3 This is a schematic diagram of the overflow valve of a hydraulic stretching machine according to this utility model;

[0019] Figure 4 This is a schematic diagram of the second pressure indication of a hydraulic stretching machine according to the present invention;

[0020] Figure 5 This is a schematic diagram of a liquid level and temperature gauge and an air filter for a hydraulic stretching machine according to this utility model;

[0021] Figure 6 This is a schematic diagram of a tension sensor for a hydraulic tensioning machine according to this utility model;

[0022] Figure 7 This is an internal schematic diagram of a hydraulic stretching machine according to the present invention;

[0023] Figure 8 This is a top view of a hydraulic stretching machine according to this utility model;

[0024] In the diagram: 1-Main body, 2-Hydraulic pump station, 3-Plunger pump, 4-Gear pump, 5-Motor, 6-Manual hydraulic pump, 7-Hydraulic cylinder, 8-Piston rod, 9-First clamping mechanism, 10-Second clamping mechanism, 11-Electrical box, 12-Ultra-high pressure relief valve, 13-First pressure gauge, 14-Relief valve, 15-Two-way hydraulic check valve, 16-Solenoid directional valve, 17-Ultra-high pressure check valve, 18-Second pressure gauge, 19-Liquid level and temperature gauge, 20-Air filter, 21-Tension sensor. Detailed Implementation

[0025] See Figures 1 to 8 This utility model discloses a hydraulic stretching machine, comprising a machine body 1, a hydraulic pump station 2, a plunger pump 3, a gear pump 4, a motor 5, a manual hydraulic pump 6, a hydraulic cylinder 7, a piston rod 8, a first clamping mechanism 9, a second clamping mechanism 10, and an electrical box 11. The hydraulic pump station 2 is located on one side of the machine body 1. The plunger pump 3 and the gear pump 4 are internally housed in the hydraulic pump station 2. Two motors 5 are located on the upper outer side of the hydraulic pump station 2 to drive the plunger pump 3 and the gear pump 4. A manual hydraulic pump 6 is located on one side of the upper outer side of the hydraulic pump station 2. The plunger pump 3, the gear pump 4, and the manual hydraulic pump 6 are all connected to a hydraulic cylinder. Hydraulic oil is drawn from the hydraulic pump station 2 through the suction pipe. The plunger pump 3, gear pump 4, and manual hydraulic pump 6 are all connected to the hydraulic cylinder 7 through the oil outlet pipe. The hydraulic cylinder 7 is installed below the machine body 1. A piston rod 8 is movable inside the hydraulic cylinder 7. A first clamping mechanism 9 is provided at the end of the piston rod 8. A second clamping mechanism 10, which works in conjunction with the first clamping mechanism 9, is fixedly provided on one side of the lower part of the machine body 1. An electrical box 11 is also provided on the outer wall of the hydraulic pump station 2. The motor 5, the first clamping mechanism 9, and the second clamping mechanism 10 are all electrically connected to the electrical box 11.

[0026] See Figure 2 This utility model discloses a hydraulic stretching machine. The oil outlet end of the plunger pump 3 is equipped with an ultra-high pressure relief valve 12 and a first pressure gauge 13. The ultra-high pressure relief valve 12 is electrically connected to the electrical box 11. By setting the ultra-high pressure relief valve 12 and the first pressure gauge 13, the flow rate and pressure of the plunger pump 3 can be controlled in real time, and the pressure data can be displayed through the first pressure gauge 13.

[0027] See Figure 3This utility model discloses a hydraulic stretching machine. The oil outlet end of the gear pump 4 is sequentially equipped with an overflow valve 14, a two-way hydraulic control check valve 15, and a solenoid directional valve 16. The overflow valve 14, the two-way hydraulic control check valve 15, and the solenoid directional valve 16 are all electrically connected to the electrical box 11. By setting the overflow valve 14, the two-way hydraulic control check valve 15, and the solenoid directional valve 16, the hydraulic oil can flow in one direction and the direction of hydraulic oil flow can be changed, thereby improving the stretching efficiency.

[0028] See Figure 4 This utility model discloses a hydraulic stretching machine. The oil outlet of the manual hydraulic pump 6 is equipped with an ultra-high pressure check valve 17 and a second pressure gauge 18. The ultra-high pressure check valve 17 is electrically connected to the electrical box 11. By setting the ultra-high pressure check valve 17 and the second pressure gauge 18, the flow rate and pressure of the manual hydraulic pump 6 can be controlled, and the pressure data can be displayed through the second pressure gauge 18.

[0029] See Figure 5 This utility model discloses a hydraulic stretching machine. The hydraulic pump station 2 is equipped with a level and temperature gauge 19 for measuring and displaying the hydraulic oil level and temperature on its outer surface. An air filter 20 is also provided on the outside of the hydraulic pump station 2. The air filter 20 is electrically connected to the electrical box 11. By setting up the level and temperature gauge 19 and the air filter 20, the level and temperature gauge 19 can display the hydraulic oil level in real time and measure the hydraulic oil temperature by utilizing the thermal expansion and contraction characteristics of a bimetallic strip. The air filter 20 can filter out impurities such as dust, sand, and suspended particles in the air, which can reduce the early wear of the piston rod 8 and extend the service life of the hydraulic cylinder 7.

[0030] See Figure 6 This utility model discloses a hydraulic stretching machine. A tension sensor 21 is installed on the hydraulic cylinder 7, and the tension sensor 21 is electrically connected to the electrical box 11. By setting the tension sensor 21, the force can be accurately measured and controlled, ensuring the precise execution of the stretching process.

[0031] The working process of this utility model:

[0032] In the operation of this hydraulic stretching machine, the material to be stretched is first fixed by the first clamping mechanism 9 and the second clamping mechanism 10. Then, the motor 5 is started by the electrical box 11. The motor 5 drives the plunger pump 3 and the gear pump 4 to draw in oil and deliver the hydraulic oil to the hydraulic cylinder 7 through the oil outlet pipe. At this time, the hydraulic oil pushes the piston rod 8 inside the hydraulic cylinder 7 to move, so that the piston rod 8 drives the material to be stretched backward. When the material is stretched to a certain extent, the plunger pump 3 and the gear pump 4 are turned off. The operator manually operates the manual hydraulic pump 6 to deliver hydraulic oil to the hydraulic cylinder 7, so that the pressure in the hydraulic cylinder 7 can be increased again, thereby accelerating the stretching speed. At the same time, the stretching stroke is longer and the working efficiency is higher.

[0033] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0034] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A hydraulic stretching machine, characterized in that: The system includes a body (1), a hydraulic pump station (2), a piston pump (3), a gear pump (4), a motor (5), a manual hydraulic pump (6), a hydraulic cylinder (7), a piston rod (8), a first clamping mechanism (9), a second clamping mechanism (10), and an electrical box (11). A hydraulic pump station (2) is located on one side of the body (1). Inside the hydraulic pump station (2) are a piston pump (3) and a gear pump (4). Two motors (5) are located on the upper outer side of the hydraulic pump station (2) to drive the piston pump (3) and the gear pump (4). A manual hydraulic pump (6) is located on one side of the upper outer side of the hydraulic pump station (2). The piston pump (3), gear pump (4), and manual hydraulic pump (6) all operate by suction... The hydraulic oil is drawn from the hydraulic pump station (2) through the oil pipeline. The plunger pump (3), gear pump (4) and manual hydraulic pump (6) are all connected to the hydraulic cylinder (7) through the oil outlet pipeline. The hydraulic cylinder (7) is installed below the machine body (1). The piston rod (8) is movable inside the hydraulic cylinder (7). The end of the piston rod (8) is provided with a first clamping mechanism (9). A second clamping mechanism (10) is fixedly provided on one side below the machine body (1) to cooperate with the first clamping mechanism (9). An electrical box (11) is also provided on the outer wall of the hydraulic pump station (2). The motor (5), the first clamping mechanism (9) and the second clamping mechanism (10) are all electrically connected to the electrical box (11).

2. The hydraulic stretching machine as described in claim 1, characterized in that: The oil outlet of the plunger pump (3) is equipped with an ultra-high pressure relief valve (12) and a first pressure gauge (13), and the ultra-high pressure relief valve (12) is electrically connected to the electrical box (11).

3. The hydraulic stretching machine as described in claim 1, characterized in that: The oil outlet of the gear pump (4) is equipped with an overflow valve (14), a two-way hydraulic check valve (15) and a solenoid directional valve (16) in sequence. The overflow valve (14), the two-way hydraulic check valve (15) and the solenoid directional valve (16) are all electrically connected to the electrical box (11).

4. A hydraulic stretching machine as described in claim 1, characterized in that: The oil outlet of the manual hydraulic pump (6) is equipped with an ultra-high pressure check valve (17) and a second pressure gauge (18), and the ultra-high pressure check valve (17) is electrically connected to the electrical box (11).

5. A hydraulic stretching machine as described in claim 1, characterized in that: The hydraulic pump station (2) is equipped with a level and temperature gauge (19) for measuring and displaying the level and temperature of hydraulic oil on its outer surface, and an air filter (20) is provided on the outside of the hydraulic pump station (2), which is electrically connected to the electrical box (11).

6. A hydraulic stretching machine according to any one of claims 1 to 5, characterized in that: A tension sensor (21) is installed on the hydraulic cylinder (7), and the tension sensor (21) is electrically connected to the electrical box (11).

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