TPU particle strength detection device

Abstract

The invention relates to the technical field of strength detection, in particular to a TPU particle strength detection device. The invention provides a TPU particle strength detection device capable of simulating an extreme environment and realizing dynamic pressure simulation, which comprises a rack, a hydraulic cylinder mounted in the rack, a piston part of the hydraulic cylinder fixedly connected with a lifting frame, a pressing frame slidably connected in the lifting frame, and an impact frame slidably connected on the pressing frame, and telescopic rods which are symmetrically distributed are fixedly connected to the pressing frame. According to the device, conventional testing is conducted on TPU particles through the hydraulic cylinder, the lifting frame, the pressing frame, the pressure sensor and the like, then dynamic pressure testing is simulated through the impact frame, then the compression condition of the TPU particles in the extreme environment is simulated through the cold air channel and the heating wire, and the device integrates conventional testing, dynamic testing and extreme temperature testing; the performance of the TPU particles under different conditions can be comprehensively evaluated, the tedious process of respective testing is avoided, and the testing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of strength detection, and in particular to a TPU particle strength detection device. Background Art

[0002] TPU stands for thermoplastic polyurethane. Its raw materials include powder and granules. TPU granules have the advantages of extremely high wear resistance, good tear resistance, chemical resistance, wide hardness range, good processing performance, high mechanical strength, cold resistance and environmental protection. They are widely used in the automotive industry, medical field and electronic manufacturing. During the production and use process, the strength of TPU granules needs to be tested to ensure that they meet the requirements of specific applications.

[0003] However, in actual applications, TPU products may face extreme environmental conditions, especially rapid changes in temperature. Automotive parts or outdoor sports equipment used in cold areas may experience a process from low temperature to high temperature or vice versa in a very short period of time. This rapid change in temperature will not only affect the physical properties of the TPU material, but also cause internal stress concentration, thereby affecting its structural integrity and service life. At the same time, during use, TPU products will not only be subjected to conventional pressure, but may also face sudden increases in pressure. This pressure change places higher requirements on the compressive performance and stability of TPU. Therefore, during production and use, it is necessary to test the strength of TPU particles. Strength testing is an important means to ensure product quality, prevent potential risks and optimize material selection. However, existing testing devices may not be able to accurately simulate temperature and pressure changes under all extreme environmental conditions, and the stability and repeatability of the test results need to be improved. Some devices may not be able to simulate extreme changes in temperature and pressure at the same time, and need to be tested separately, which increases the complexity and cost of the test.

[0004] In order to accurately measure the compressive resistance of TPU materials in the above environment, a TPU particle strength detection device was designed which can simulate extreme environments and realize dynamic pressure simulation. Summary of the invention

[0005] In order to overcome the shortcomings that existing detection devices may not be able to accurately simulate the temperature and pressure changes under all extreme environmental conditions, and the stability and repeatability of the test results need to be improved, and some devices may not be able to simulate the extreme changes of temperature and pressure at the same time, and need to be tested separately, which increases the complexity and cost of the test, the present invention proposes a TPU particle strength detection device that can simulate extreme environments and realize dynamic pressure simulation.

[0006] The TPU particle strength detection device comprises a frame, a hydraulic cylinder is installed in the frame, a lifting frame is fixedly connected to the piston part of the hydraulic cylinder, a pressing frame is slidably connected to the lifting frame, an impact frame is slidably connected to the pressing frame, symmetrically distributed telescopic rods are fixedly connected to the pressing frame, a fixed cylinder is connected between the telescopic parts of the symmetrically distributed telescopic rods, the pressing frame passes through the fixed cylinder, a pressure sensor is installed in the pressing frame, a rotating cylinder is movably connected to the fixed cylinder, a placing frame is fixedly connected in the frame, the placing frame is located directly below the pressing frame, a fan is installed in the placing frame, a three-way pipe is fixedly connected in the placing frame, a heating wire is installed in one branch pipe of the three-way pipe, another branch pipe of the three-way pipe is provided with a cold air channel, and the end of the cold air channel is externally connected to a refrigerator.

[0007] Optionally, a funnel-shaped placement groove is provided in the placement rack, and air holes evenly distributed along the circumference are provided on the placement groove, and the evenly distributed air holes are arranged in an arc shape.

[0008] Optionally, rectangular windows evenly distributed along the circumferential direction are provided on the sides of the fixed cylinder and the rotating cylinder that are close to each other, and the rectangular windows on the inner and outer sides are staggered with each other.

[0009] Optionally, a first motor is also included, which is installed on a side of the frame away from the hydraulic cylinder. The output shaft of the first motor is connected to the first gear through a coupling. A ball valve core is rotatably connected to the three-way pipe. An arc channel is opened in the ball valve core. The two ends of the arc channel are respectively connected to two branches of the three-way pipe. The ball valve core is fixedly connected to the second gear.

[0010] Optionally, the first gear and the second gear mesh with each other.

[0011] Optionally, a fixed frame is also included, which is fixedly connected to the top of the lifting frame. The pressing frame is slidably connected to the fixed frame, and the impact frame is also slidably connected to the fixed frame. A second motor is also installed on the top of the lifting frame, and the output shaft of the second motor is connected to the pushing frame through a coupling. The impact frame is fixedly connected to symmetrically distributed fixed columns on one side close to the pushing frame, and the pushing frame is located between the symmetrically distributed fixed columns.

[0012] Optionally, a push rod is further included, which is slidably connected to the placement rack, the placement rack is rotatably connected to a rotating rack, and the rotating rack is also rotatably connected to the top wall of the frame.

[0013] Optionally, an arc-shaped clamping hole is opened on the second gear, the push rod penetrates into the arc-shaped clamping hole, and an inclined sliding groove is opened on the rotating frame, and the push rod slides in the inclined sliding groove.

[0014] Optionally, both the bottom of the rotating drum and the top of the rotating frame are provided with ring gears, and the two ring gears are meshed with each other.

[0015] Optionally, a filter screen is also included, and the filter screen is fixedly connected to the branch pipe on one side of the three-way pipe close to the heating wire.

[0016] The present invention has the following advantages: the present invention first performs conventional tests on TPU particles through hydraulic cylinders, lifting frames, pressing frames, pressure sensors, etc., and then simulates dynamic pressure tests through impact frames, and then simulates the pressure conditions of TPU particles under extreme environments through cold air channels and heating wires. The device integrates conventional tests, dynamic tests, and extreme temperature tests, and can comprehensively evaluate the performance of TPU particles under different conditions, avoiding the cumbersome process of conducting tests separately, simplifying the test steps, reducing the test cost, shortening the test cycle, and improving the test efficiency.

[0017] The present invention realizes fast and convenient switching between extremely cold and extremely hot environments through the cooperation of the first gear, the second gear, and the ball valve core, as well as the ingenious design of the arc channel and the branch pipe, which not only improves the flexibility of the test, but also further reduces the test cost and time cost.

[0018] The present invention realizes automatic hammering of the impact frame on the pressing frame through the cooperation of the pushing frame and the fixing column, thus avoiding the time-consuming and laborious manual hammering by the staff, not only ensuring the continuity and accuracy of the test, but also improving the test efficiency and shortening the test cycle.

[0019] The present invention realizes rapid temperature recovery when switching between extremely cold or extremely hot environments through the cooperation between the push rod and the rotating frame and the setting of the filter screen, and effectively prevents the influence of dust on the heating wire, thereby ensuring the accuracy and stability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the first viewing angle of the present invention.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the second viewing angle of the present invention.

[0022] Figure 3 It is a three-dimensional structural cross-sectional view of the hydraulic cylinder, lifting frame, pressing frame and other components of the present invention.

[0023] Figure 4 It is a three-dimensional structural cross-sectional view of the telescopic rod, the fixed cylinder, the rotating cylinder and other components of the present invention.

[0024] Figure 5 It is a three-dimensional structural cross-sectional view of the components such as the placement rack, the fan and the three-way pipe of the present invention.

[0025] Figure 6 It is a three-dimensional structural sectional view of the first motor, the first gear, the ball valve core and other components of the present invention.

[0026] Figure 7 It is a three-dimensional structural cross-sectional view of components such as a placement rack, a three-way pipe and a ball valve core of the present invention.

[0027] Figure 8 It is a schematic diagram of the three-dimensional structure of the second gear and the ball valve core of the present invention.

[0028] Fig. 9 It is a three-dimensional structural schematic diagram of the fixing frame, the second motor, the pushing frame and other components of the present invention.

[0029] Fig.10 It is a three-dimensional structural cross-sectional view of the push rod, rotating frame, rotating cylinder and other components of the present invention.

[0030] Fig.11 It is a three-dimensional structural schematic diagram of the components such as the placement rack, the three-way pipe and the filter screen of the present invention.

[0031] Marks in the accompanying drawings: 101_frame, 102_hydraulic cylinder, 103_lifting frame, 104_pressing frame, 105_impact frame, 106_pressure sensor, 107_placing frame, 1071_tee pipe, 108_telescopic rod, 109_fixed cylinder, 110_rotating cylinder, 111_fan, 112_heating wire, 113_cold air channel, 201_first motor, 202_first gear, 203_second gear, 204_ball valve core, 301_fixed frame, 302_second motor, 303_pushing frame, 304_fixed column, 401_pushing rod, 402_rotating frame, 501_filter. DETAILED DESCRIPTION

[0032] Reference to an embodiment herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] Embodiment 1: TPU particle strength detection device, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, it includes a frame 101, a hydraulic cylinder 102 is installed on the inner side of the rear wall of the frame 101, a lifting frame 103 is fixedly connected to the piston part on the upper side of the hydraulic cylinder 102, a pressing frame 104 is slidably connected to the upper part of the lifting frame 103, an impact frame 105 is slidably connected to the upper side of the pressing frame 104, telescopic rods 108 are fixedly connected to the left and right sides of the pressing frame 104, a fixed cylinder 109 is connected between the telescopic parts of the two telescopic rods 108, the pressing frame 104 passes through the fixed cylinder 109, a pressure sensor 106 is installed on the lower part of the pressing frame 104, a rotating cylinder 110 is movably connected to the lower part of the fixed cylinder 109, a placing frame 107 is fixedly connected to the frame 101, The placement rack 107 is located directly below the pressing rack 104, and a funnel-shaped placement groove is provided in the placement rack 107. The placement groove is provided with air holes evenly distributed along the circumferential direction, and the evenly distributed air holes are arranged in an arc shape. A fan 111 is installed in the inner lower part of the placement rack 107, and a three-way pipe 1071 is fixedly connected to the placement rack 107. A heating wire 112 is installed in the branch pipe on the left side of the three-way pipe 1071, and a cold air channel 113 is provided in the branch pipe on the right side of the three-way pipe 1071. The end of the cold air channel 113 is externally connected to a refrigerator, and four rectangular windows evenly distributed along the circumferential direction are provided on the side where the fixed cylinder 109 and the rotating cylinder 110 are close to each other, and the rectangular windows on the inner and outer sides are staggered.

[0034] When using the device, the TPU particles to be tested are first placed in the funnel-shaped placement groove of the placement rack 107. When the TPU particles need to be subjected to a conventional pressure test, the hydraulic cylinder 102 can be controlled to drive the lifting rack 103 to move downward, thereby driving the pressing rack 104, the telescopic rod 108, the fixed cylinder 109, the pressure sensor 106, the rotating cylinder 110, etc. to move downward together. When the rotating cylinder 110 and the fixed cylinder 109 moving downward contact the placement rack 107, the fixed cylinder 109 and the rotating cylinder 110 will cover the placement rack 107 to form a pressure sensor. A relatively closed space, and the placement frame 107 will resist the fixed cylinder 109 and the rotating cylinder 110. As the pressing frame 104 continues to drive the pressure sensor 106 and the telescopic rod 108 to move downward, the telescopic rod 108 will shrink, and the downward moving pressure sensor 106 will contact the TPU particles in the placement groove and apply a downward pressure to the TPU particles, simulating the situation where the TPU particles are subjected to conventional pressure. When the predetermined pressure value or test time is reached, the movement of the hydraulic cylinder 102 can be stopped to complete the pressure test on the TPU particles.

[0035] When it is necessary to add additional dynamic pressure test to the TPU particles, on the basis of conventional test, the staff holds the impact frame 105 and continuously impacts the pressing frame 104 downward to increase the additional dynamic pressure, and then observes the changes of the TPU particles under the dynamic pressure, and records the relevant data to simulate the situation that the TPU particles are facing a sudden increase in pressure. When it is necessary to perform pressure test on the TPU particles under extremely cold or extremely hot temperature conditions, such as in an extremely hot environment, the staff can control the heating wire 112 to generate heat and the fan 111 to run. The heat generated by the heating wire 112 will heat up the air in the three-way pipe 1071, and then cooperate with the fan 111 to generate heat. Fan 111, fan 111 will accelerate the hot air to flow to the upper part of the placement rack 107, and enter the placement groove through the arc-shaped air holes, so that the air in the placement groove is heated, and the TPU particles are heated to the required temperature before conventional or dynamic pressure testing. Similarly, for example, in an extremely cold environment, the staff can first control the heating wire 112 to stop heating, and then pass cold air into the cold air channel 113 through the refrigerator. Under the action of the fan 111, the cold air will also enter the placement groove through the arc-shaped air holes and cool the TPU particles. After lowering the temperature of the TPU particles to the required temperature, conventional or dynamic pressure testing can be carried out, thereby completing the pressure test of TPU particles in extreme environments.

[0036] When the test is completed, the staff can control the hydraulic cylinder 102 to drive the lifting frame 103 to move upward and reset, thereby driving the pressing frame 104, telescopic rod 108, fixed cylinder 109, pressure sensor 106, rotating cylinder 110, etc. to move upward and reset, and then take out the tested TPU particles from the placement rack 107. In summary, the TPU particles are first subjected to conventional tests through the hydraulic cylinder 102, lifting frame 103, pressing frame 104, pressure sensor 106, etc., and then the dynamic pressure test is simulated through the impact frame 105, and then the pressure of the TPU particles in extreme environments is simulated through the cold air channel 113 and the heating wire 112. The device integrates conventional tests, dynamic tests and extreme temperature tests, and can comprehensively evaluate the performance of TPU particles under different conditions, avoiding the cumbersome process of testing separately, simplifying the test steps, reducing the test cost, shortening the test cycle, and improving the test efficiency.

[0037] Embodiment 2: Based on embodiment 1, Figure 1 , Figure 6 , Figure 7 and Figure 8As shown, it also includes a first motor 201, which is installed on the front wall of the frame 101. The output shaft on the rear side of the first motor 201 is connected to the first gear 202 through a coupling. A ball valve core 204 is rotatably connected to the three-way pipe 1071. An arc channel is opened in the ball valve core 204. The two ends of the arc channel are respectively connected to two branches of the three-way pipe 1071. A second gear 203 is fixed to the front side of the ball valve core 204, and the first gear 202 and the second gear 203 are meshed with each other.

[0038] Initially, one side of the arc channel of the ball valve core 204 is connected to the placement rack 107, and the other side is connected to the heating wire 112, while the cold air channel 113 is in a closed state. The heat generated by the heating wire 112 will only enter the placement rack 107 through the arc channel of the ball valve core 204. At this time, the test of the extremely hot environment can be carried out. When it is necessary to switch between extremely cold or extremely hot environmental conditions, the staff can control the first motor 201 to drive the first gear 202 to rotate counterclockwise. Since the first gear 202 is meshed with the second gear 203, the ball valve core 204 is driven to rotate through the second gear 203. The ball valve core 204 will rotate 120° to the right, so that one side of the arc channel of the ball valve core 204 is connected to the placement rack 107, and the other side is connected to the cold air channel 113.

[0039] At the same time, the branch pipe originally connected to the heating wire 112 is now in a closed state, cutting off the heat input, and the test in the extremely cold environment can be carried out at this time; on the contrary, if the first motor 201 is controlled to drive the first gear 202 to rotate clockwise, the ball valve core 204 will rotate 120° to the left to reset, and the environment will switch from the extremely cold to the extremely hot. In summary, through the cooperation of the first gear 202, the second gear 203, and the ball valve core 204, and the ingenious design of the arc channel and the branch pipe, a fast and convenient switch between the extremely cold and extremely hot environments is achieved, which not only improves the flexibility of the test, but also further reduces the test cost and time cost.

[0040] like Figure 1 and Fig. 9 As shown, it also includes a fixing frame 301, which is fixedly connected to the top front side of the lifting frame 103, the pressing frame 104 is slidably connected to the fixing frame 301, and the impact frame 105 is also slidably connected to the fixing frame 301. A second motor 302 is installed on the top rear side of the lifting frame 103, and the output shaft on the upper side of the second motor 302 is connected to the pushing frame 303 through a coupling. The pushing frame 303 is annularly arranged with the left side lower and the right side higher. Two fixing columns 304 are fixedly connected to the rear side of the impact frame 105, and the front side of the pushing frame 303 is located between the two fixing columns 304.

[0041] When it is necessary to simulate the situation where the TPU particles are facing a sudden increase in pressure, the staff can control the second motor 302 to drive the pushing frame 303 to rotate, thereby driving the impact frame 105 to move up and down through the fixed column 304, so that the impact frame 105 automatically and continuously impacts the pressing frame 104 downward, avoiding the time-consuming and laborious manual hammering by the staff. When the test is completed, the second motor 302 stops running. In summary, through the cooperation between the pushing frame 303 and the fixed column 304, the automatic hammering of the pressing frame 104 by the impact frame 105 is realized, avoiding the time-consuming and laborious manual hammering by the staff, which not only ensures the continuity and accuracy of the test, but also improves the test efficiency and shortens the test cycle.

[0042] like Fig.10 As shown, it also includes a pushing rod 401, which is slidably connected to the front side of the placement frame 107, and the upper part of the placement frame 107 is rotatably connected to the rotating frame 402, and the rotating frame 402 is also rotatably connected to the top wall of the frame 101, and the second gear 203 is provided with an arc-shaped card hole, and the lower part of the pushing rod 401 is inserted into the arc-shaped card hole, and the rotating frame 402 is provided with an inclined slide groove, and the pushing rod 401 slides in the inclined slide groove, and the bottom of the rotating cylinder 110 and the top of the rotating frame 402 are provided with ring gears, and the two ring gears are meshed with each other.

[0043] like Fig.11 As shown, a filter screen 501 is also included, and the filter screen 501 is fixedly connected to the branch pipe on the left side of the three-way pipe 1071.

[0044] When the fixed cylinder 109 and the rotating cylinder 110 are covered on the placement rack 107 to form a relatively closed space, the rotating cylinder 110 will also be pressed on the rotating rack 402, and the rotating cylinder 110 and the rotating rack 402 are meshed with each other through the ring gear. Therefore, when the second gear 203 rotates left and right, since the lower part of the push rod 401 extends into the arc-shaped clamping hole of the second gear 203, the second gear 203 will drive the push rod 401 to move up and down, thereby driving the rotating rack 402 to rotate, and then driving the rotating cylinder 110 to rotate, causing the rectangular windows of the fixed cylinder 109 and the rotating cylinder 110 to overlap first and then stagger, so that the placement rack 107 is The slot is circulated with indoor air through a rectangular window, so that when switching between extremely cold or extremely hot environments, the TPU particles placed in the slot can quickly return to normal temperature, and when conducting an extremely hot test, when the heating wire 112 is heated, when the external air enters the three-way pipe 1071, the dust in the air will be filtered by the filter 501 to prevent it from adhering to the heating wire 112 and affecting its normal operation. In summary, through the mutual cooperation of the push rod 401 and the rotating frame 402, and the setting of the filter 501, rapid temperature recovery is achieved when switching between extremely cold or extremely hot environments, and the influence of dust on the heating wire 112 is effectively prevented, thereby ensuring the accuracy and stability of the test.

[0045] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A TPU particle strength detection device, comprising a frame (101), a hydraulic cylinder (102) installed in the frame (101), a piston portion of the hydraulic cylinder (102) fixedly connected to a lifting frame (103), a pressing frame (104) slidably connected to the lifting frame (103), characterized in that: The device also includes an impact frame (105), the impact frame (105) is slidably connected to the pressing frame (104), the pressing frame (104) is fixedly connected with symmetrically distributed telescopic rods (108), a fixed cylinder (109) is connected between the telescopic parts of the symmetrically distributed telescopic rods (108), the pressing frame (104) passes through the fixed cylinder (109), a pressure sensor (106) is installed in the pressing frame (104), and a rotating cylinder (110) is movably connected to the fixed cylinder (109). ), a placing rack (107) is fixedly connected inside the frame (101), the placing rack (107) is located directly below the pressing rack (104), a fan (111) is installed inside the placing rack (107), a three-way pipe (1071) is fixedly connected inside the placing rack (107), a heating wire (112) is installed in one branch pipe of the three-way pipe (1071), a cold air channel (113) is provided in the other branch pipe of the three-way pipe (1071), and the end of the cold air channel (113) is externally connected to a refrigerator.

2. The TPU particle strength detection device according to claim 1, characterized in that: A funnel-shaped placement groove is provided in the placement frame (107), and air holes evenly distributed along the circumference are provided on the placement groove, and the evenly distributed air holes are arranged in an arc shape.

3. The TPU particle strength detection device according to claim 2, characterized in that: The fixed cylinder (109) and the rotating cylinder (110) are both provided with rectangular windows evenly distributed along the circumferential direction on one side where the fixed cylinder (109) and the rotating cylinder (110) are close to each other, and the rectangular windows on the inner and outer sides are staggered with each other.

4. The TPU particle strength detection device according to claim 3, characterized in that: The invention also includes a first motor (201), which is installed on a side of the frame (101) away from the hydraulic cylinder (102), the output shaft of the first motor (201) is connected to the first gear (202) via a coupling, a ball valve core (204) is rotatably connected to the three-way pipe (1071), an arc-shaped channel is opened in the ball valve core (204), the two ends of the arc-shaped channel are respectively connected to two branches of the three-way pipe (1071), and the ball valve core (204) is fixedly connected to the second gear (203).

5. The TPU particle strength detection device according to claim 4, characterized in that: The first gear (202) and the second gear (203) mesh with each other.

6. The TPU particle strength detection device according to claim 5, characterized in that: The invention also includes a fixing frame (301), the fixing frame (301) is fixedly connected to the top of the lifting frame (103), the pressing frame (104) is slidably connected to the fixing frame (301), the impact frame (105) is also slidably connected to the fixing frame (301), a second motor (302) is also installed on the top of the lifting frame (103), the output shaft of the second motor (302) is connected to the pushing frame (303) through a coupling, and a side of the impact frame (105) close to the pushing frame (303) is fixedly connected to symmetrically distributed fixing columns (304), and the pushing frame (303) is located between the symmetrically distributed fixing columns (304).

7. The TPU particle strength detection device according to claim 6, characterized in that: The machine also includes a push rod (401) which is slidably connected to the placement rack (107). The placement rack (107) is rotatably connected to a rotating rack (402). The rotating rack (402) is also rotatably connected to the top wall of the frame (101).

8. The TPU particle strength detection device according to claim 7, characterized in that: The second gear (203) is provided with an arc-shaped clamping hole, the push rod (401) penetrates into the arc-shaped clamping hole, the rotating frame (402) is provided with an oblique sliding groove, the push rod (401) slides in the oblique sliding groove.

9. The TPU particle strength detection device according to claim 8, characterized in that: The bottom of the rotating drum (110) and the top of the rotating frame (402) are both provided with ring gears, and the two ring gears are meshed with each other.

10. The TPU particle strength detection device according to claim 9, characterized in that: It also includes a filter screen (501), which is fixedly connected to a branch pipe on one side of the three-way pipe (1071) close to the heating wire (112).

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