Rigid foamed plastic compression creep testing machine

Abstract

The utility model relates to the technical field of rigid foamed plastic test detection, in particular to a rigid foamed plastic compression creep testing machine, which comprises a test box and an adjusting box, hydraulic devices distributed at equal intervals are mounted at the upper end of the test box, and hydraulic rods of the hydraulic devices extend into the test box and are provided with pressure sensors. A displacement detection plate is mounted at the lower end of the pressure sensor, a lifting movable hole is formed in the displacement detection plate, the limiting column is located in the lifting movable hole, a mounting rod is mounted at the lower end of the displacement detection plate, a pressure head is mounted at the tail end of the mounting rod and located over the placement plate, and the adjusting box is mounted at the rear end of the test box. A threaded rod is rotationally installed in the adjusting box, and a movable block is installed on the threaded rod in a threaded mode. The compression creep test device has the advantages that the compression creep test is carried out by continuously and stably applying pressure in a hydraulic manner, the applied pressure can be conveniently adjusted, the pressure head can be limited, and the loading and unloading safety of rigid foamed plastic is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rigid foam plastic testing and detection, in particular to a rigid foam plastic compression creep testing machine. Background Art

[0002] Rigid foam is a type of foam that is inflexible, has a high compression hardness, and can deform under certain stress but cannot return to its original shape after the stress is released. According to the ISO definition, a foam that loses more than 10% of its thickness after being compressed to 50% and then released is considered rigid foam.

[0003] When using the rigid foam plastic compression creep testing machine, the pressure is increased by adding weight plates. Although the weight of each weight plate is different, the weight is set to a fixed value, which makes it inconvenient to adjust the pressure applied to the rigid foam plastic. Moreover, during the test, the staff manually adds the rigid foam plastic to the compression position, which creates a risk of the pressure head dropping and injuring the hands, resulting in insufficient safety. Utility Model Content

[0004] The purpose of the present utility model is to provide a rigid foam plastic compression creep testing machine, which has the advantages of being able to perform compression creep tests by applying continuous and stable pressure in a hydraulic manner, conveniently adjusting the pressure applied, and limiting the pressure head, thereby improving the safety of loading and unloading rigid foam plastics, and solving the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a rigid foam plastic compression creep testing machine, comprising a test box and an adjustment box, wherein the inner wall of the bottom end of the test box is installed with placement plates distributed at equal intervals, and the test box is installed with limit columns distributed at equal intervals, and the upper end of the test box is installed with hydraulic equipment distributed at equal intervals, and the hydraulic rod of the hydraulic equipment extends to the test box and is installed with a pressure sensor, and the lower end of the pressure sensor is installed with a displacement detection plate, a lifting movable hole is opened on the displacement detection plate, and the limit column is located in the lifting movable hole, and the lower end of the displacement detection plate is installed with a mounting rod, and a pressure head is installed at the end of the mounting rod, and the pressure head is located directly above the placement plate, and the adjustment box is installed at the rear end of the test box, and a threaded rod is rotatably installed in the adjustment box, and a movable block is threadedly installed on the threaded rod.

[0006] When using the rigid foam plastic compression creep testing machine of the present invention, the box door is opened during loading, and three rigid foam plastics are placed on three placement plates respectively. At this time, the limit plate supports the displacement detection plate to prevent the pressure head from falling. After loading is completed, the box door is closed, and the driving device is operated to rotate the threaded rod. With the cooperation of the movable block, the limit plate can be moved to a position on one side below the displacement detection plate. The three hydraulic devices are operated to make the three pressure heads drop to apply continuous and stable pressure to the rigid foam plastic. The pressure applied can be detected by the pressure sensor, and at the same time, the test box is heated by the heater to keep the temperature heated by the heater stable, thereby heating the rigid foam plastic. The temperature can be detected by the temperature sensor, and the rigid foam plastic is compressed under continuous pressure and temperature conditions. In the process of compression creep of the rigid foam plastic, the displacement distance of the displacement detection plate is detected through the detection hole by the grating micrometer, and the compression creep data line is displayed on the display of the control system.

[0007] Preferably, a base is installed at the lower end of the test box, and there are four bases in total, and the four bases are distributed in an array with respect to the test box.

[0008] Preferably, a box door is installed at the front end of the test box, and a handle is provided at the front end of the box door.

[0009] Preferably, a heater is provided on one inner wall of the test box, and a temperature sensor is provided on the inner wall of the test box away from the heater. The temperature sensor is used to detect the pressure.

[0010] Preferably, the upper end of the test box is bolted with mounting blocks corresponding to the number of displacement detection plates, and corresponding detection holes are provided on the mounting blocks and the upper end of the test box. A mounting frame is mounted on the upper end of the mounting blocks, and a grating micrometer is mounted on the mounting frame. The grating micrometer is set for compression creep testing.

[0011] Preferably, a driving device is installed at the front end of the regulating box, and the main shaft of the driving device is connected to the axis of the threaded rod. The driving device can make the threaded rod rotate clockwise or counterclockwise, thereby adjusting the front and rear position of the limit plate.

[0012] Preferably, a first fixing rod is mounted on the upper end of the movable block, a second fixing rod is mounted on the end of the first fixing rod, and a limit plate is mounted on the end of the second fixing rod. When the limit plate is located below the displacement detection plate, the limit plate can limit the displacement detection plate from descending, and when the limit plate is located to the side below the displacement detection plate, the limit plate cannot limit the displacement detection plate.

[0013] Preferably, a movable opening is provided at the upper end of the adjustment box, and the first fixing rod extends out of the adjustment box from the movable opening. The provision of the movable opening facilitates the forward and backward movement of the first fixing rod.

[0014] Preferably, an extension hole is opened at the rear end of the test box, the second fixing rod extends from the extension hole into the test box, and the limit plate is located below the displacement detection plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention uses hydraulic equipment to lower the pressure head to apply pressure to compress and creep the rigid foam plastic, and at the same time cooperates with a pressure sensor to detect the pressure. The setting of the hydraulic equipment can apply pressure to the rigid foam plastic according to the required pressure value, and the setting relative to the weight plate is convenient for controlling and adjusting the pressure size. When loading and unloading, the limit plate is moved to the bottom of the displacement detection plate by the driving device. The displacement detection plate can be limited to a lower position by the limit plate, which can prevent the loading and unloading of materials from damaging the hydraulic equipment and other situations from causing the pressure head to drop suddenly, thereby improving the safety of equipment use and preventing injuries to workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view structural diagram of the utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the utility model;

[0018] Figure 3 This is a rear view structural diagram of the utility model;

[0019] Figure 4 It is a partial front view structural diagram of the present invention.

[0020] The reference numerals and names in the figures are as follows:

[0021] 101. Test chamber; 102. Base; 103. Chamber door; 104. Detection hole; 105. Placement plate; 106. Temperature sensor; 107. Limit column; 201. Mounting seat; 202. Mounting frame; 203. Grating micrometer; 301. Hydraulic equipment; 302. Pressure sensor; 303. Displacement detection plate; 304. Lifting movable hole; 305. Mounting rod; 306. Pressure head; 401. Adjustment box; 402. Driving device; 403. Movable port; 404. Movable block; 405. First fixed rod; 406. Second fixed rod; 407. Limit plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1

[0024] See also Figures 1 to 4 , the utility model provides an embodiment: a rigid foam plastic compression creep testing machine, including a test box 101 and an adjustment box 401, the lower end of the test box 101 is installed with a base 102, there are four bases 102, and the four bases 102 are distributed in an array with respect to the test box 101, the front end of the test box 101 is installed with a box door 103, the front end of the box door 103 is provided with a handle, one side of the inner wall of the test box 101 is provided with a heater, the inner wall of the side of the test box 101 away from the heater is provided with a temperature sensor 106, the bottom inner wall of the test box 101 is installed with equidistantly distributed placement plates 105, the test box 101 is installed with equidistantly distributed limit columns 107, the upper end of the test box 101 is installed with equidistantly distributed hydraulic equipment 301, hydraulic The hydraulic rod of the pressure device 301 extends into the test box 101 and is installed with a pressure sensor 302. The lower end of the pressure sensor 302 is installed with a displacement detection plate 303. A lifting hole 304 is provided on the displacement detection plate 303. The limit column 107 is located in the lifting hole 304. The lower end of the displacement detection plate 303 is installed with a mounting rod 305. The end of the mounting rod 305 is installed with a pressure head 306. The pressure head 306 is located directly above the placement plate 105. The upper end of the test box 101 is fixed with a corresponding number of mounting seats 201 as the displacement detection plate 303 by bolts. The mounting seat 201 and the upper end of the test box 101 are provided with corresponding detection holes 104. The upper end of the mounting seat 201 is installed with a mounting frame 202, and a grating micrometer 203 is installed on the mounting frame 202.

[0025] Example 2

[0026] See also Figures 1 to 4, the utility model provides an embodiment: a rigid foam plastic compression creep testing machine, compared with embodiment 1, this embodiment further includes: the adjusting box 401 is installed at the rear end of the test box 101, a threaded rod is rotatably installed in the adjusting box 401, a driving device 402 is installed at the front end of the adjusting box 401, the main shaft of the driving device 402 is connected to the axis of the threaded rod, a movable block 404 is threadedly installed on the threaded rod, a first fixing rod 405 is installed at the upper end of the movable block 404, a second fixing rod 406 is installed at the end of the first fixing rod 405, and a limit plate 407 is installed at the end of the second fixing rod 406, a movable opening 403 is opened at the upper end of the adjusting box 401, the first fixing rod 405 extends out of the adjusting box 401 from the movable opening 403, an extension hole is opened at the rear end of the test box 101, the second fixing rod 406 extends from the extension hole into the test box 101, and the limit plate 407 is located below the displacement detection plate 303.

[0027] The electronic control system, temperature sensor 106, grating micrometer 203, hydraulic equipment 301, pressure sensor 302, heater and driving equipment 402 in the present invention are existing equipment, and their working principles and circuit connections are well known to technicians in this field. They are all conventional means or common knowledge. The present invention only utilizes their functions and does not improve their structures. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0028] Working principle: The utility model is controlled by an external electronic control system. When loading, the box door 103 is opened and three rigid foam plastics are placed on three placement plates 105 respectively. At this time, the limit plate 407 supports the displacement detection plate 303 to prevent the pressure head 306 from falling. After the loading is completed, the box door is closed. At this time, the driving device 402 works to rotate the threaded rod. With the cooperation of the movable block, the limit plate 407 can be moved to a position on the side below the displacement detection plate 303. The three hydraulic devices 301 work to make the three pressure heads 306 fall to press the rigid foam plastics. Continuous and stable pressure is applied, and the applied pressure can be detected by the pressure sensor 302. At the same time, the test box 101 is heated by the heater to keep the temperature of the heater stable, thereby heating the rigid foam plastic. The temperature can be detected by the temperature sensor 106. Under continuous pressure and temperature conditions, the rigid foam plastic is compressed. During the compression creep process of the rigid foam plastic, the displacement distance of the displacement detection plate 303 is detected through the detection hole by the grating micrometer 203, and the compression creep data line is displayed on the display of the control system.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A rigid foam plastic compression creep testing machine, comprising a test box (101) and an adjustment box (401), characterized in that: The inner wall of the bottom end of the test box (101) is installed with placement plates (105) distributed at equal intervals, and the test box (101) is installed with limit columns (107) distributed at equal intervals. The upper end of the test box (101) is installed with hydraulic equipment (301) distributed at equal intervals, and the hydraulic rod of the hydraulic equipment (301) extends to the test box (101) and is installed with a pressure sensor (302). The lower end of the pressure sensor (302) is installed with a displacement detection plate (303), and the displacement detection plate (303) is installed. 3) is provided with a lifting movable hole (304), the limiting column (107) is located in the lifting movable hole (304), the lower end of the displacement detection plate (303) is installed with a mounting rod (305), the end of the mounting rod (305) is installed with a pressure head (306), and the pressure head (306) is located just above the placement plate (105), the regulating box (401) is installed at the rear end of the test box (101), a threaded rod is rotatably installed in the regulating box (401), and a movable block (404) is threadedly installed on the threaded rod.

2. The rigid foam plastic compression creep testing machine according to claim 1, characterized in that: A base (102) is installed at the lower end of the test box (101), and there are four bases (102) in total, and the four bases (102) are distributed in an array with respect to the test box (101).

3. The rigid foam plastic compression creep testing machine according to claim 1, characterized in that: The front end of the test box (101) is provided with a box door (103), and the front end of the box door (103) is provided with a handle.

4. The rigid foam plastic compression creep testing machine according to claim 1, characterized in that: A heater is provided on one inner wall of the test box (101), and a temperature sensor (106) is provided on the inner wall of the test box (101) facing away from the heater.

5. The rigid foam plastic compression creep testing machine according to claim 1, characterized in that: The upper end of the test box (101) is mounted with mounting seats (201) having a number corresponding to the displacement detection plates (303) via bolts. The mounting seats (201) and the upper end of the test box (101) are provided with corresponding detection holes (104). The upper end of the mounting seats (201) is mounted with a mounting frame (202), and a grating micrometer (203) is mounted on the mounting frame (202).

6. The rigid foam plastic compression creep testing machine according to claim 1, characterized in that: A driving device (402) is installed at the front end of the regulating box (401), and the main shaft of the driving device (402) is connected to the axis of the threaded rod.

7. The rigid foam plastic compression creep testing machine according to claim 1, characterized in that: A first fixing rod (405) is installed at the upper end of the movable block (404), a second fixing rod (406) is installed at the end of the first fixing rod (405), and a limiting plate (407) is installed at the end of the second fixing rod (406).

8. The rigid foam plastic compression creep testing machine according to claim 7, characterized in that: A movable opening (403) is provided at the upper end of the regulating box (401), and the first fixing rod (405) extends out of the regulating box (401) from the movable opening (403).

9. The rigid foam plastic compression creep testing machine according to claim 7, characterized in that: An extension hole is provided at the rear end of the test box (101), the second fixing rod (406) extends from the extension hole into the test box (101), and the limiting plate (407) is located below the displacement detection plate (303).

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