CN218766723U - Thermal deformation vicat testing machine - Google Patents

Abstract

The utility model relates to a thermal deformation vicat testing machine, which comprises a frame, a test box arranged on the frame, a plurality of sample frames, a turntable positioned in the test box, a mounting plate connected with the bottom of the test box in a sliding way, a driving device for driving the turntable to rotate and a lifting component for driving the mounting plate to lift; the sample rack is arranged on the turntable; the rotary table is provided with a rotating shaft connected with a driving device, and the driving device is arranged on the mounting plate; the lifting component is arranged on the frame. When testing, the carousel can drive the sample frame in the proof box internal rotation, has improved the temperature homogeneity of medium in the proof box, makes the temperature that the sample frame received on different positions be the same, has avoided the influence of temperature difference to the test result, improves experimental accuracy and stability.

Description

Thermal deformation vicat testing machine

Technical Field

The utility model relates to a material performance test equipment technical field, more specifically relates to a heat altered shape vicat testing machine.

Background

The thermal deformation Vicat softening point temperature tester is mainly used for measuring the thermal deformation temperature and the Vicat softening point temperature of non-metal materials such as plastics, hard rubber, nylon, electric insulation materials, long fiber reinforced composite materials, high-strength thermosetting laminated materials and the like. The instrument generally includes a frame and a sample holder mounted on the frame with a test area of the sample holder located within a media box of the frame.

The utility model provides a current thermal deformation vicat softening point temperature measurement appearance, which comprises a housin, the inside fixed mounting of casing has the box, the inside difference fixed mounting of box has first bearing box and second bearing box, the inside movable mounting of first bearing box has first pivot, through clockwise rotation carousel, can drive first pivot clockwise rotation through first bearing box when the carousel rotates, can drive first gear clockwise rotation when first pivot rotates, can drive second gear anticlockwise rotation when first gear rotates, and the second gear is the outside of fixed mounting at first threaded rod, so first threaded rod will anticlockwise rotation, can drive first thread bush rebound during first threaded rod anticlockwise rotation, can drive the workstation upward movement through the second connecting rod during first thread bush upward movement, it is very convenient to reach the sample frame like this and mention, also can not damage the sample frame.

However, in the technical scheme, a plurality of sample racks are arranged in parallel in the box body, when a heating test is carried out, different positions of the sample racks have different temperatures, particularly, the process of heating a medium in the box body is a progressive process, and the temperature rise of the central position is slow, so that the sample racks cannot be uniformly heated in the box body. In addition, the sample rack is lifted by operating the turntable in a manual operation mode, so that the working efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome above-mentioned prior art well sample frame and be heated inhomogeneous problem in the box, provide a heat altered shape vicat testing machine, in the experimentation, can let the medium in the box heat up more evenly for the sample frame of different positions is unanimous at the temperature that same time bore.

In order to solve the technical problem, the utility model adopts the technical scheme that: a thermal deformation Vicat testing machine comprises a rack, a test chamber arranged on the rack, a plurality of sample racks, a turntable positioned in the test chamber, an installation plate in sliding connection with the bottom of the test chamber, a driving device for driving the turntable to rotate and a lifting assembly for driving the installation plate to lift; the sample rack is arranged on the turntable; the rotary table is provided with a rotating shaft connected with the driving device, and the driving device is arranged on the mounting plate; the lifting assembly is mounted on the frame.

In foretell technical scheme, lifting unit promotes the mounting panel for outside the bottom plate of sample frame exposes to the proof box, after placing the sample that awaits measuring on the bottom plate of sample frame, lifting unit drives the mounting panel and descends, makes the bottom plate of sample frame move to the proof box in, reaches experimental temperature through heating the medium to in the proof box. The medium in the test chamber can be air or liquid, and the medium is preferably liquid in order to improve the heat transfer effect. In the heating process, the driving device drives the turntable to rotate, so that the medium in the test box continuously flows in the test box, the temperature rise rates of the medium at each position in the test box can be consistent as much as possible, and the temperatures of the sample frame on different positions are the same.

If the medium is liquid, the mounting plate keeps sealing with the test chamber in the sliding process.

Preferably, the inner wall of the test chamber is provided with a heating device and a cooling device. The heating device can be an electric heating wire or a hot water pipe which circularly exchanges heat with the outside; the cooling device can be a semiconductor refrigeration device or a cooling water pipe, and cold water circularly flows in the cooling water pipe. The heating device heats the medium in the test chamber. And the cooling device is used for accelerating the cooling of the medium after the completion of one test, so that the time for waiting for the cooling of the medium between two tests can be shortened.

Preferably, the turntable comprises a first rotating plate and a second rotating plate, the first rotating plate and the second rotating plate are connected through a rotating shaft, the first rotating plate is closer to the bottom of the test chamber than the second rotating plate, and the diameter of the second rotating plate is consistent with the inner diameter of the opening of the test chamber; the bottom plate of the sample rack is arranged on the first rotating plate; the second rotating plate is provided with a space avoiding part for the sample rack to pass through. Under operating condition, the second rotating plate is located at the opening of the test box, and generates a certain sealing effect on the opening of the test box, so that heat loss in the test box is reduced, and meanwhile, the first rotating plate can rotate and rise.

Preferably, the diameter of the first rotation plate is larger than the inner diameter of the opening of the test chamber, so that the first rotation plate can be prevented from moving excessively to fall off the test chamber.

Preferably, the lifting assembly comprises a cylinder, a lifting plate connected with a piston rod of the cylinder, and a connecting rod installed on the lifting plate, and the other end of the connecting rod is connected with the mounting plate. Thereby the cylinder drives the lifter plate and goes up and down to drive the mounting panel and go up and down, and the cylinder can realize automatic rising and can target in place by the one shot motion, improves the efficiency of mentioning the sample frame.

Preferably, the direction in which the mounting plate is kept sealed with the bottom of the test chamber in the sliding process can be the maximum movement distance of the thickness of the mounting plate greater than the rotary table, or a slide way is arranged at the bottom of the test chamber, and the mounting plate slides in the slide way. Furthermore, in order to enhance the sealing performance of the mounting plate and the test box, a sealing glue is arranged on the edge of the mounting plate and is abutted against the test box or the slide way.

Preferably, the sample rack comprises a bottom plate, a top plate, a support rod for connecting the bottom plate and the top plate, a pressure rod connected with the top plate in a sliding manner, an adjusting device arranged on the top plate and used for adjusting the height of the pressure rod, and a pressure head arranged at one end of the pressure rod close to the bottom plate. The height of the pressure rod is firstly lifted through the adjusting device, a sample to be tested is placed on the bottom plate and fixed, then the height of the pressure rod is reduced through the adjusting device, and the pressure head is enabled to be abutted against the sample to be tested. The adjusting device can be an electric telescopic rod, a manual telescopic rod or a mechanical part with other structures, which can drive the compression bar to lift.

Preferably, one end of the pressure lever close to the top plate is provided with an adjusting disc; the adjusting device comprises a fixed plate arranged on the top plate, a rotating handle rotationally connected with the fixed plate, a swing rod connected with the rotating handle and a butting part connected with the swing rod; the abutting part abuts against the bottom surface of the adjusting plate. Thereby rotate the handle through twisting and can make the pendulum rod take place to rotate and change the height of butt portion, change when the high emergence of butt portion, also can follow the lift that butt portion moved also realization depression bar with the adjustment disk of butt portion butt, accomplish a test after, twist and change the handle and promote the depression bar and just can take out the sample that awaits measuring and put other sample that awaits measuring on the bottom plate again. After the sample to be measured is placed, the handle is twisted to enable the pressure rod to descend to the pressure head to be abutted to the sample. After the pressure head abuts against the sample, a gap can be reserved between the abutting part and the adjusting disc, and the pressure rod can have movable allowance to sense the change of pressure when the sample deforms.

Preferably, the top plate is further provided with a limiting column, and the limiting column is located in a projection area projected by the adjusting disc along the vertical direction. Spacing post is located the within range that the adjusting disk covered, and when the depression bar descends to extreme position, the adjusting disk will be with the top surface butt of spacing post, avoids the depression bar decline to have surpassed spacingly.

Preferably, the pressure head comprises a main body provided with a cavity and a needle head in threaded connection with the main body; the side wall of the main body is provided with a threaded hole penetrating through the cavity; the main body is sleeved on the pressure rod through the cavity, and is abutted to the pressure rod after penetrating through the threaded hole through a fastener. The needle head of the pressure head is a quick-wear part, the needle head is separated from the main body, the pressure head can be continuously used only by replacing the needle head after the needle head is damaged, and the maintenance cost is low.

Compared with the prior art, the beneficial effects of the utility model are that: when testing, the carousel can drive the sample frame in the proof box internal rotation, has improved the temperature homogeneity of medium in the proof box, makes the temperature that the sample frame received on different positions be the same, has avoided the influence of temperature difference to the test result, improves experimental accuracy and stability.

Drawings

FIG. 1 is a perspective view of a thermal deformation Vicat tester according to example 1;

FIG. 2 is a schematic top view showing a thermal deformation Vicat tester according to example 1;

FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic diagram showing the structure of the test chamber, the turntable and the sample rack of example 1;

FIG. 5 is a schematic view showing the structure of a sample holder according to example 2;

fig. 6 is a schematic structural view of an indenter of embodiment 3.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the present embodiments, certain elements of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

The same or similar reference numbers in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", "long", "short", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limiting the present patent, and those skilled in the art will understand the specific meaning of the terms according to their specific circumstances.

The technical solution of the present invention is further described in detail by the following specific embodiments in combination with the accompanying drawings:

example 1

As shown in fig. 1-4, an embodiment of a thermal deformation vicat testing machine includes a frame 1, a test chamber 2 mounted on the frame 1, a plurality of sample holders 3, a turntable 4 located in the test chamber 2, a mounting plate 5 slidably connected to the bottom of the test chamber 2, a driving device 6 for driving the turntable 4 to rotate, and a lifting assembly 7 for driving the mounting plate 5 to lift; the sample rack 3 is arranged on the turntable 4; the rotary table 4 is provided with a rotating shaft 401 connected with a driving device 6, and the driving device 6 is arranged on the mounting plate 5; the lifting component 7 is arranged on the frame 1.

Specifically, the inner wall of the test chamber 2 is provided with a heating device 201 and a cooling device 202. The heating device 201 is an electric heating tube; the cooling device 202 is a cooling water pipe in which cooling water circulates. The heating device 201 heats the medium in the test chamber 2. And the cooling device 202 is used for accelerating cooling of the medium after one test is completed, so that the time for waiting for cooling of the medium between two tests can be shortened.

Further, the turntable 4 includes a first rotating plate 402 and a second rotating plate 403, the first rotating plate 402 and the second rotating plate 403 are connected by a rotating shaft 401, the first rotating plate 402 is closer to the bottom of the test chamber 2 than the second rotating plate 403, and the diameter of the second rotating plate 403 is consistent with the inner diameter of the opening of the test chamber 2; the base plate 301 of the sample holder 3 is mounted on the first rotation plate 402; the second rotating plate 403 is provided with a blank space through which the sample rack 3 passes. In the working state, the second rotating plate 403 is located at the opening of the test chamber 2, and has a certain sealing effect on the opening of the test chamber 2, so as to reduce the heat loss in the test chamber 2, and meanwhile, the first rotating plate 402 can rotate and rise. The diameter of the first rotation plate 402 is larger than the inner diameter of the opening of the test chamber 2, so that the first rotation plate 402 is prevented from moving excessively to come out of the test chamber 2.

The lifting assembly 7 comprises an air cylinder 701, a lifting plate 702 connected with a piston rod of the air cylinder 701, and a connecting rod 703 mounted on the lifting plate 702, wherein the other end of the connecting rod 703 is connected with the mounting plate 5. Thereby cylinder 701 drives lifter plate 702 and goes up and down to drive mounting panel 5 and go up and down, and cylinder 701 can realize automatic rising and can target in place by the motion, improves the efficiency of mentioning sample frame 3.

In this embodiment, the medium is silicone oil, and in order to avoid the silicone oil leakage of the mounting plate 5 in the sliding process, the bottom of the test box 2 is provided with a slide 203, the mounting plate 5 slides in the slide 203, and the edge of the mounting plate 5 is provided with a sealant to abut against the inner wall of the slide 203.

In addition, a controller may be provided on the top of the rotating shaft 401, and each sample holder 3 is provided with a temperature sensor on the bottom plate 301, which is electrically connected to the controller.

The working principle or working process of the embodiment is as follows: the piston rod of cylinder 701 stretches out and promotes mounting panel 5 for bottom plate 301 of sample frame 3 promotes to be close parallel and level department with 2 openings of proof box, exposes to the proof box 2 outside, places the sample that awaits measuring on bottom plate 301 of sample frame 3 after, and the piston rod of cylinder 701 resets and drives mounting panel 5 and descend, makes bottom plate 301 of sample frame 3 move to in the proof box 2, heats the temperature that reaches the experiment through the medium to in the proof box 2. The medium in the test box 2 is silicon oil, and in the process of heating and testing, the driving device 6 is a servo motor and drives the turntable 4 to rotate, so that the silicon oil in the test box 2 continuously flows in the test box 2, the heating rate of the silicon oil at each position in the test box 2 can be consistent as much as possible, and the temperature of the sample frame 3 at different positions is the same.

The beneficial effects of this embodiment: when testing, carousel 4 can drive sample frame 3 at 2 internal rotations of proof box, has improved the temperature homogeneity of medium in proof box 2, makes the temperature that sample frame 3 received on different positions be the same, has avoided the influence of temperature difference to the test result, improves experimental accuracy and stability.

Example 2

Another example of the thermal deformation vicat testing machine is different from example 1 in that a sample holder 3 is further defined as shown in fig. 5, in addition to example 1.

The sample holder 3 comprises a bottom plate 301, a top plate 302, a support rod 303 for connecting the bottom plate 301 and the top plate 302, a press rod 304 slidably connected with the top plate 302, an adjusting device mounted on the top plate 302 for adjusting the height of the press rod 304, and a press head 305 mounted at one end of the press rod 304 near the bottom plate 301. The height of the press rod 304 is raised by the adjusting device, and after the sample to be tested is placed on the bottom plate 301 and fixed, the height of the press rod 304 is lowered by the adjusting device, and the press head 305 is abutted to the sample to be tested. The adjusting device may be an electric telescopic rod, a manual telescopic rod or a mechanical component with other structures, which can drive the pressing rod 304 to lift. An adjusting disc 3041 is arranged at one end of the pressure lever 304 close to the top plate 302; the adjusting device comprises a fixed plate 306 arranged on the top plate 302, a rotating handle 307 rotationally connected with the fixed plate 306, a swinging rod 308 connected with the rotating handle 307 and an abutting part 309 connected with the swinging rod 308; the abutting portion 309 abuts against the bottom surface of the adjustment disk 3041. The swing rod 308 can be rotated by twisting the rotating handle 307, so that the height of the abutting part 309 is changed, when the height of the abutting part 309 is changed, the adjusting disk 3041 abutted to the abutting part 309 can also move along with the abutting part 309 to realize the lifting of the pressing rod 304, and after a test is completed, the sample to be tested can be taken out by twisting the handle to lift the pressing rod 304, and another sample to be tested can be placed on the bottom plate 301 again. After the sample to be tested is placed, the handle is twisted to lower the plunger 304 until the ram 305 abuts the sample. After the pressure head 305 abuts against the sample, a gap may be left between the abutting portion 309 and the adjusting disk 3041, so that the pressure rod 304 may have a movable margin to sense the change of the pressure when the sample is deformed. The top plate 302 is further provided with a limiting post 3010, and the limiting post 3010 is located in a projection area of the adjusting disk 3041 projected along the vertical direction. The limiting post 3010 is located in a range covered by the adjusting plate 3041, and when the pressing rod 304 descends to a limiting position, the adjusting plate 3041 will abut against the top surface of the limiting post 3010, so as to prevent the pressing rod 304 from descending beyond the limiting position.

In addition, in order to enhance the stability of the lifting of the press rod 304, a guide plate 3011 is arranged between the bottom plate 301 and the top plate 302, and the press rod 304 is connected with the guide plate 3011 in a sliding manner.

In this embodiment, a pressure gauge 3012 may be installed at a terminal of the pressing rod 304 far from the end of the pressing head 305, and the pressure gauge 3012 may detect the pressure between the pressing head 305 and the sample to be tested to confirm the in-place condition of the pressing head 305 and the condition of the sample to be tested, where the pressure of the pressure gauge 3012 may change after the sample to be tested is thermally deformed. The abutting portion 309 is a circular wheel rotatably connected to the swing link 309, and the circular wheel can be in line contact with the adjustment disk 3041 and can reduce the movement resistance by rotating when the height of the pressing rod 304 is adjusted.

The remaining features and principles of this embodiment are consistent with embodiment 1.

Example 3

Another embodiment of a thermal deformation vicat tester is different from embodiment 2 in that an indenter 305 is further defined as shown in fig. 6 on the basis of embodiment 2.

The pressure head 305 comprises a main body 3051 provided with a cavity and a needle 3052 in threaded connection with the main body 3051; a threaded hole 3053 penetrating to the cavity is formed in the side wall of the main body 3051; the main body 3051 is sleeved on the compression bar 304 through the cavity, and is abutted to the compression bar 304 after passing through the threaded hole 3053 through a fastener. The needle 3052 of the pressure head 305 is a vulnerable part, the needle 3052 is separated from the main body 3051, and the pressure head 305 can be continuously used only by replacing the needle 3052 after the needle 3052 is damaged, so that the maintenance cost is low.

In this embodiment, a bolt 3054 is placed in an inner cavity of the body 3051 and a screw part of the bolt passes through an end surface of the body 3051, and a needle 3052 is screwed to the screw part of the bolt.

The remaining features and principles of this embodiment are consistent with embodiment 2.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A thermal deformation Vicat testing machine comprises a rack (1), a test box (2) and a plurality of sample racks (3), wherein the test box (2) is installed on the rack (1), and the thermal deformation Vicat testing machine is characterized by further comprising a turntable (4) positioned in the test box (2), an installation plate (5) in sliding connection with the bottom of the test box (2), a driving device (6) for driving the turntable (4) to rotate and a lifting assembly (7) for driving the installation plate (5) to lift; the sample rack (3) is arranged on the rotary disc (4); the rotary table (4) is provided with a rotating shaft (401) connected with the driving device (6), and the driving device (6) is installed on the installation plate (5); the lifting component (7) is arranged on the frame (1).

2. A thermally deformable vicat testing machine as claimed in claim 1, characterized in that said test chamber (2) is provided with heating means (201) and cooling means (202) on its inner wall.

3. A thermally deformable vicat testing machine as claimed in claim 1, characterized in that said carousel (4) comprises a first rotating plate (402) and a second rotating plate (403), said first rotating plate (402) and said second rotating plate (403) being connected by said rotating shaft (401), said first rotating plate (402) being closer to the bottom of said test chamber (2) than said second rotating plate (403), said second rotating plate (403) having a diameter corresponding to the internal diameter of the opening of said test chamber (2); the bottom plate (301) of the sample rack (3) is arranged on the first rotating plate (402); the second rotating plate (403) is provided with a space-avoiding part for the sample rack (3) to pass through.

4. A thermally deformable vicat testing machine as claimed in claim 3, characterized in that said first rotation plate (402) has a diameter greater than the internal diameter of the opening of said test chamber (2).

5. A thermally deformable vicat testing machine as claimed in claim 1 wherein said lifting assembly (7) comprises a cylinder (701), a lifting plate (702) connected to the piston rod of cylinder (701), a connecting rod (703) mounted on said lifting plate (702), the other end of connecting rod (703) being connected to said mounting plate (5).

6. A thermally deformable vicat testing machine as claimed in claim 1, characterized in that said test chamber (2) is provided at its bottom with a slide (203), said mounting plate (5) slides in said slide (203) and the edge of said mounting plate (5) abuts against said slide (203) by means of a sealing rubber strip.

7. A thermally deformable Vicat tester as claimed in any one of claims 1 to 6 wherein said sample holder (3) comprises a base plate (301), a top plate (302), support rods (303) for connecting said base plate (301) and top plate (302), a pressure bar (304) slidably connected to said top plate (302), means for adjusting the height of said pressure bar (304) mounted on said top plate (302) and a pressure head (305) mounted on the end of said pressure bar (304) adjacent to said base plate (301).

8. A thermally deformable Vicat tester as claimed in claim 7 characterised in that the end of the said strut (304) close to the said top plate (302) is provided with an adjustment dial (3041); the adjusting device comprises a fixed plate (306) arranged on the top plate (302), a rotating handle (307) rotatably connected with the fixed plate (306), a swing rod (308) connected with the rotating handle (307) and a contact part (309) connected with the swing rod (308); the abutting portion (309) abuts against a bottom surface of the adjustment disk (3041).

9. A thermally deformable vicat testing machine as claimed in claim 8 wherein said top plate (302) is further provided with a spacing post (3010), said spacing post (3010) being located in a projection area of said adjustment disk (3041) projected in a vertical direction.

10. A thermally deformable vicat tester as claimed in claim 8, characterized in that said indenter (305) comprises a body (3051) provided with a cavity and a needle (3052) screwed to said body (3051); a threaded hole (3053) penetrating through the cavity is formed in the side wall of the main body (3051); the main body (3051) is sleeved on the pressure lever (304) through the cavity, and is abutted against the pressure lever (304) after penetrating through the threaded hole (3053) through a fastener.

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