Marshall test piece stability tester

Abstract

The Marshall test piece stability tester comprises a base, an upper clamping plate and a lower clamping plate, supporting rods are fixedly connected to the two sides of the top end of the base, lifting rings are slidably connected to the supporting rods, and lifting rods are fixedly connected to the side faces of the lifting rings. The upper clamping plate can be temporarily supported, during use, a sample is placed on the lower clamping plate, then the two rotating rods are folded towards the middle at the same time, at the moment, the upper clamping plate descends and covers the top of the sample, then the ejector rod is started, testing is completed, and compared with an existing testing mechanism, the operation time can be shortened, and use is more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt detection, and particularly relates to a Marshall specimen stability tester. Background Art

[0002] In the quality inspection of asphalt mixture materials, the Marshall stability and flow value tests are the main inspection contents. During the inspection process, according to the JTJ / T052-2000 inspection regulations, the Marshall impact specimens prefabricated and placed for a certain time together with the heavy fixtures need to be placed in a constant temperature water bath for maintenance for a certain time. Then, the fixtures are taken out, installed in place, and the displacement sensors are installed. Then, the first specimen is taken out and installed in the fixture, and the Marshall stability and flow value of the specimen are measured by turning on the machine. It is required that the time from taking out the specimen to measuring the Marshall stability and flow value shall not exceed 30 seconds. Then, the first specimen is taken out and installed in the fixture for measurement, and so on to complete the measurement of the remaining specimens in a group.

[0003] During the test process of traditional testers, it is necessary to manually open the fixture and then put the specimen into it. Usually, the weight of the fixture is 2-3 kilograms. Since it is already very laborious to hold the specimen with one hand, it is even more difficult to open the fixture with one hand, and there is also a 30-second time limit, making it even more difficult to complete the detection.

[0004] Therefore, how to provide a Marshall specimen stability tester to solve the problems existing in the prior art is of great significance for its application. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide a Marshall specimen stability tester to solve the problems that in the test process of traditional testers, it is necessary to manually open the fixture and then put the specimen into it. Usually, the weight of the fixture is 2-3 kilograms. Since it is already very laborious to hold the specimen with one hand, it is even more difficult to open the fixture with one hand, and there is also a 30-second time limit, making it even more difficult to complete the detection.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A Marshall specimen stability tester includes a base, an upper clamping plate, and a lower clamping plate. Both sides of the top of the base are fixedly connected with support rods. The support rods are slidably connected with lifting rings. The side of the lifting ring is fixedly connected with a lifting rod. The top of the lifting rod is fixedly connected with a guide post. The upper clamping plate is slidably connected with the guide post. The middle of the top of the base is provided with a jacking rod. The top of the jacking rod is provided with a lifting seat. The lower clamping plate is installed at the top of the lifting seat.

[0008] Preferably, the top of the support rod is fixedly connected with an upper fixing rod, and a base is fixedly connected between the tops of the two upper fixing rods.

[0009] Preferably, a upper connecting block is fixedly connected to the middle of the bottom end of the base, and a pressure sensor is installed at the bottom end of the upper connecting block.

[0010] Preferably, a side fixing ear is installed on one side of the lower clamping plate, and a displacement sensor is arranged between the side fixing ear and the upper clamping plate.

[0011] Preferably, a rotating sleeve is rotatably connected to the bottom end of the support rod. The rotating sleeve is located below the lifting ring. A protrusion is fixedly connected to the side of the support rod. A sliding groove is formed on the surface of the rotating sleeve. The protrusion is slidably connected to the sliding groove. The rotating sleeve is fixedly connected to a rotating rod.

[0012] Preferably, a vertical groove is formed on the side of the support rod. The lifting ring is provided with a limiting block adapted to the vertical groove. The lifting ring and the bottom end of the upper fixing rod are elastically connected by a spring.

[0013] Preferably, a top head is fixedly connected to the middle of the top end of the upper clamping plate. The top head is located directly below the pressure sensor.

[0014] Preferably, a connecting rod is fixedly connected to one side of the rotating sleeve, and a limiting plate is fixedly connected to the end of the connecting rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The present invention can temporarily support the upper clamping plate. During use, the test specimen is placed on the lower clamping plate, and then the two rotating rods are simultaneously closed towards the middle. At this time, the upper clamping plate descends and covers the top of the test specimen. Subsequently, the ejector rod is started to complete the test. Compared with the existing test mechanism, the present invention can shorten the operation time and is more convenient to use.

[0017] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented in accordance with the content of the description. Moreover, in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following describes the preferred embodiments of the present application in detail in conjunction with the drawings.

[0018] Those skilled in the art will understand the above and other purposes, advantages and features of the present application more clearly according to the following detailed description of the specific embodiments of the present application in conjunction with the drawings. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts do not necessarily draw according to the actual scale.

[0020] Figure 1 is a schematic structural diagram of the present invention;

[0021] Figure 2 is a schematic structural diagram of the present invention before placing the specimen;

[0022] Figure 3 is a schematic structural diagram of the present invention after placing the specimen;

[0023] Figure 4 is a schematic structural diagram of the present invention during testing;

[0024] Figure 5 is Figure 1 an enlarged view of part A of

[0025] Figure 6 is a schematic structural diagram of the rotating sleeve in the present invention.

[0026] In the figure: 1, base; 2, ejector rod; 3, lifting seat; 4, upper clamping plate; 5, pressure sensor; 6, upper connecting block; 7, support rod; 8, spring; 9, lifting ring; 10, rotating sleeve; 11, rotating rod; 12, limiting plate; 13, connecting rod; 14, chute; 15, displacement sensor; 16, guide post; 17, top head; 18, lower clamping plate; 19, side fixing ear; 20, protrusion; 21, vertical groove; 22, upper fixing rod; 23, lifting rod; 24, base. Detailed implementation manners

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. In the following description, providing specific details such as specific configurations and components is only to help comprehensively understand the embodiments of the present application. Therefore, those skilled in the art should clearly understand that various changes and modifications can be made to the embodiments described here without departing from the scope and spirit of the present application. Additionally, for clarity and conciseness, the description of known functions and structures is omitted in the embodiments.

[0028] In addition, this application may repeat reference numerals and / or letters in different instances. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0029] The term "and / or" in this document is merely a description of the associated relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B may mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this document is a description of another associated object relationship, indicating that two relationships may exist. For example, A / and B may mean: A exists alone, and A and B exist alone. In addition, the character " / " in this document generally indicates that the associated objects before and after are in an "or" relationship.

[0030] It should also be noted that in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion.

[0031] Please refer to Figure 1-6 , the present invention provides a technical solution for a Marshall specimen stability tester: including a base 1, an upper clamping plate 4 and a lower clamping plate 18. Both sides of the top of the base 1 are fixedly connected with support rods 7. The support rods 7 are slidably connected with lifting rings 9. The side of the lifting ring 9 is fixedly connected with a lifting rod 23. The top of the lifting rod 23 is fixedly connected with a guide post 16. The upper clamping plate 4 is slidably connected with the guide post 16. The middle of the top of the base 1 is provided with a jacking rod 2. The top of the jacking rod 2 is provided with a lifting seat 3. The lower clamping plate 18 is installed at the top of the lifting seat 3.

[0032] The top of the support rod 7 is fixedly connected with an upper fixing rod 22. Between the tops of the two upper fixing rods 22 is fixedly connected with a base 24.

[0033] The middle of the bottom end of the base 24 is fixedly connected with an upper connecting block 6. The bottom of the upper connecting block 6 is provided with a pressure sensor 5. The pressure sensor 5 is used to detect the pressure on the specimen.

[0034] One side of the lower clamping plate 18 is provided with a side fixing ear 19. A displacement sensor 15 is arranged between the side fixing ear 19 and the upper clamping plate 4. The displacement sensor 15 is used to detect the deformation of the specimen.

[0035] The bottom end of the support rod 7 is rotatably connected to a rotating sleeve 10. The rotating sleeve 10 is located below the lifting ring 9. A protrusion 20 is fixedly connected to the side of the support rod 7. A chute 14 is formed on the surface of the rotating sleeve 10. The protrusion 20 is slidably connected to the chute 14. The rotating sleeve 10 is fixedly connected to a rotating rod 11. A vertical groove 21 is formed on the side of the support rod 7. The lifting ring 9 is provided with a limiting block adapted to the vertical groove 21. The lifting ring 9 and the bottom end of the upper fixing rod 22 are elastically connected by a spring 8. The middle of the top end of the upper clamping plate 4 is fixedly connected to a top head 17. The top head 17 is located directly below the pressure sensor 5.

[0036] One side of the rotating sleeve 10 is fixedly connected to a connecting rod 13. The end of the connecting rod 13 is fixedly connected to a limiting plate 12. The limiting plate 12 is located on the back above the lower clamping plate 18, so as to limit the front and back positions of the specimen and prevent the specimen from skewing.

[0037] During specific use, in the initial state, the two rotating rods 11 are respectively on both sides of the device. At the same time, the protrusion 20 is at the lowest position of the chute 14. At this time, the position of the rotating sleeve 10 is the highest, that is, the lifting ring 9 is at the highest position, thus lifting the upper clamping plate 4. And at this time, the limiting plate 12 is located on the back above the lower clamping plate 18, so as to limit the front and back positions of the specimen and prevent the specimen from skewing. Then the specimen is placed above the lower clamping plate 18. Then the two rotating rods 11 are rotated simultaneously towards the front side of the device. At this time, the rotating sleeve 10 rotates, and the top end of the chute 14 is engaged with the protrusion 20. The spring 8 drives the lifting ring 9 to descend, thus clamping the upper clamping plate 14 at the top of the specimen. And the limiting plate 12 moves out of the top of the lower clamping plate 18. Then the ejector rod 2 is started. The ejector rod 2 drives the lower clamping plate 18 to move upward through the lifting seat 3 and drives the specimen to move upward until the top end of the upper clamping plate 17 contacts the pressure sensor 5. The specimen is tested by extrusion, and the deformation degree of the specimen is tested by the displacement sensor 15 to complete the detection of the specimen.

[0038] The above are only the preferred embodiments of the present invention, and it does not limit the protection scope of the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any changes, modifications, substitutions, integrations and parameter changes made to these embodiments by conventional substitutions or capable of achieving the same functions without departing from the principle and spirit of the present invention fall within the protection scope of the present invention.

Claims

1. A Marshall specimen stability tester, characterized in that: It includes a base (1), an upper clamping plate (4) and a lower clamping plate (18). Both sides of the top of the base (1) are fixedly connected with support rods (7). The support rods (7) are slidably connected with lifting rings (9). The side of the lifting ring (9) is fixedly connected with a lifting rod (23). The top of the lifting rod (23) is fixedly connected with a guide post (16). The upper clamping plate (4) is slidably connected with the guide post (16). A jacking rod (2) is installed in the middle of the top of the base (1). The top of the jacking rod (2) is installed with a lifting seat (3). The lower clamping plate (18) is installed at the top of the lifting seat (3).

2. The Marshall specimen stability tester according to claim 1, characterized in that: The top of the support rod (7) is fixedly connected with an upper fixing rod (22). A base (24) is fixedly connected between the tops of the two upper fixing rods (22).

3. The Marshall specimen stability tester according to claim 2, characterized in that: The middle of the bottom end of the base (24) is fixedly connected with an upper connecting block (6). A pressure sensor (5) is installed at the bottom end of the upper connecting block (6).

4. The Marshall specimen stability tester according to claim 3, characterized in that: One side of the lower clamping plate (18) is installed with a side fixing ear (19). A displacement sensor (15) is arranged between the side fixing ear (19) and the upper clamping plate (4).

5. The Marshall specimen stability tester according to claim 3, characterized in that: The bottom end of the support rod (7) is rotatably connected with a rotating sleeve (10). The rotating sleeve (10) is located below the lifting ring (9). A protrusion (20) is fixedly connected to the side of the support rod (7). A chute (14) is opened on the surface of the rotating sleeve (10). The protrusion (20) is slidably connected with the chute (14). The rotating sleeve (10) is fixedly connected with a rotating rod (11).

6. The Marshall specimen stability tester according to claim 3, characterized in that: A vertical groove (21) is opened on the side of the support rod (7). The lifting ring (9) is provided with a limiting block adapted to the vertical groove (21). The lifting ring (9) and the bottom ends of the upper fixing rods (22) are elastically connected by a spring (8).

7. The Marshall specimen stability tester according to claim 3, characterized in that: The middle of the top end of the upper clamping plate (4) is fixedly connected with a top head (17). The top head (17) is located directly below the pressure sensor (5).

8. The Marshall specimen stability tester according to claim 3, characterized in that: One side of the rotating sleeve (10) is fixedly connected with a connecting rod (13). The end of the connecting rod (13) is fixedly connected with a limiting plate (12).

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