A modified asphalt constant temperature shearing test device

Abstract

The utility model belongs to bitumen shearing test technical field, concretely is a kind of modified asphalt constant-temperature shearing test device, including the shearing assembly that can make modifier and asphalt matrix fully mix, reaction assembly that can provide suitable environment for modification reaction is provided in shearing assembly upper, sealing assembly that can be conveniently operated to maintain reaction temperature is provided in reaction assembly upper.The utility model is convenient to set transmission part between the rotating lever of high-speed rotation and the flap between being able to overturn and being internally provided with gas passage, the opening of flap can be linked adjustment with the height variation of rotating lever, in combination with the setting of sealing member, the air-tight constant-temperature environment required by asphalt and modifier reaction can be effectively maintained when flap is closed, to guarantee the accuracy of test data and operating safety.

Description

Technical Field

[0001] This utility model belongs to the field of asphalt shear testing technology, specifically relating to a modified asphalt isothermal shear testing device. Background Technology

[0002] The modified asphalt isothermal shear test apparatus is a professional device used for the preparation and testing of modified asphalt samples in the laboratory. Its core function is to simulate factory production conditions and optimize the modification process, ensuring that asphalt and modifiers are efficiently mixed in a controlled environment, and achieving homogeneous dispersion and stable swelling of the modifiers in the asphalt matrix.

[0003] Chinese patent document CN221925854U discloses a constant temperature shearing machine. By setting a spliced ​​heat preservation cover on the heat preservation box, the heat preservation cover, which is composed of multiple cover bodies and has a through hole in the center, can not affect the insertion of asphalt into the working end of the shearing machine. At the same time, the heat preservation box is sealed to maintain a constant temperature, ensuring that the temperature inside the box is uniform and constant, so that the asphalt is heated evenly. This achieves uniform shearing and avoids asphalt sticking to the shearing machine due to uneven heating.

[0004] However, in the existing technology, the splicing structure of the heat insulation cover with through holes and the independent opening and closing and locking design require the staff to wait for the high temperature cover to cool down or use tools to open and close it, which is cumbersome. In addition, its through holes will destroy the airtightness of the environment in which the asphalt is located, resulting in temperature fluctuations. Therefore, a modified asphalt isothermal shear test device is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a modified asphalt isothermal shear test device.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A modified asphalt isothermal shear test apparatus includes a shearing component that allows the modifier to be fully mixed with the asphalt matrix, a reaction component that provides a suitable environment for the modification reaction is provided above the shearing component, and a sealing component that can be easily operated to maintain the reaction temperature is provided above the reaction component.

[0008] The shear assembly includes a rotating rod;

[0009] The reaction assembly includes a constant-temperature oven located below the rotating rod;

[0010] The sealing assembly includes a tilting element that can move with the rotating rod to facilitate the opening and closing of the opening above the constant temperature oven, a sealing element that can further prevent heat loss from the environment where the asphalt is located, and a transmission element that can transmit changes in the height of the rotating rod to the tilting element.

[0011] The flipping component includes a ring frame fixedly connected to the upper side of the constant temperature oven, with flip covers movably connected to both sides of the ring frame;

[0012] The transmission component includes a sleeve fixedly connected to the outer side of the rotating rod, a buckle is movably mounted on the outer side of the sleeve, and a telescopic rod is movably mounted between the buckle and the flip cover.

[0013] Preferably, the flip-top also includes multiple air inlets integrally formed on one side of the flip cover, and a suction tube is fixedly connected to the other side of the flip cover, with a plug at one end of the suction tube.

[0014] Preferably, the sealing element includes a sealing ring plate fixedly connected to the side of the ring frame, a carbon sealing ring fixedly connected to the flip cover, and sealing gaskets fixedly connected to the flip cover are provided at the front and rear of the carbon sealing ring.

[0015] Preferably, the flip cover has a hollow structure, and two sliding grooves are provided on the side of the flip cover near the tube.

[0016] Preferably, the ring frame is rotatably connected to the flip cover, and a pin is provided between the two sliding grooves of the flip cover and the telescopic end of the telescopic rod, the pin is slidably connected to the flip cover, and the pin can rotate around its own axis in the sliding groove.

[0017] Preferably, the buckle frame consists of two symmetrical parts, with the sleeve and buckle frame slidably connected, and the buckle frame can rotate relative to the sleeve around the axis of the rotating rod, and the buckle frame is rotatably connected to the telescopic rod.

[0018] Preferably, the inner diameter of the carbon sealing ring is the same as the outer diameter of the rotating rod.

[0019] The beneficial effects of this utility model are as follows: by setting a transmission component between a high-speed rotating rod and a flip-top cover with an internal gas channel, the opening degree of the flip-top cover can be adjusted in conjunction with the height change of the rotating rod. Combined with the setting of the sealing component, the airtight and constant temperature environment required for the reaction of asphalt and modifier can be effectively maintained when the flip-top cover is closed, thereby ensuring the accuracy of test data and operational safety. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the modified asphalt isothermal shear test device described in this utility model;

[0022] Figure 2 This is a schematic diagram of the main structure of the modified asphalt isothermal shear test device described in this utility model;

[0023] Figure 3 yes Figure 1 Another perspective structural diagram;

[0024] Figure 4 yes Figure 1 A schematic diagram of some of the component structures.

[0025] The annotations in the attached figures are explained as follows:

[0026] 1. Shearing assembly; 101. Frame; 102. Hydraulic cylinder; 103. Limiting rod; 104. Lifting frame; 105. Power unit; 106. Rotating rod; 107. Shearing head; 2. Reaction assembly; 201. Constant temperature oven; 202. Shearing container; 3. Sealing assembly; 301. Ring frame; 302. Flip cover; 303. Air inlet; 304. Pulling pipe; 305. Plug cap; 306. Sealing ring; 307. Carbon sealing ring; 308. Sealing gasket; 309. Sleeve; 310. Buckle frame; 311. Telescopic rod. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0030] like Figures 1-4As shown, a modified asphalt isothermal shear test device includes a shear component 1 that allows the modifier to be fully mixed with the asphalt matrix, a reaction component 2 that provides a suitable environment for the modification reaction is provided above the shear component 1, and a sealing component 3 that can be easily operated to maintain the reaction temperature is provided above the reaction component 2.

[0031] In this embodiment: the shearing assembly 1 includes a frame 101, a hydraulic cylinder 102 is fixedly installed inside the rear of the frame 101, two limiting rods 103 are movably connected to the frame 101 and pass through it laterally, a lifting frame 104 is provided between the two limiting rods 103 and the telescopic end of the hydraulic cylinder 102, a power unit 105 is fixedly installed on the front end of the lifting frame 104, a rotating rod 106 is fixedly connected to the output end of the power unit 105, and a shearing head 107 is fixedly connected to the lower end of the rotating rod 106;

[0032] The limit rod 103 and the lifting frame 104 are both slidably connected to the frame 101;

[0033] The frame 101 provides installation positions for components such as the hydraulic cylinder 102 and the constant temperature oven 201. The lifting frame 104, which is limited by the frame 101, the hydraulic cylinder 102, and the limit rod 103, can slide and rise relative to the frame 101 as the hydraulic cylinder 102 moves and its extension end changes height. The power unit 105, which can rise and fall with the lifting frame 104, drives the rotating rod 106 connected to the shear head 107 to rotate at the required speed. The high-speed rotating shear head 107 contacts and shears the asphalt and reactant in the reaction component 2.

[0034] In this embodiment: the reaction component 2 includes a constant temperature oven 201 fixedly installed on the frame 101, and a shearing container 202 is fixedly installed inside the constant temperature oven 201;

[0035] The constant temperature oven 201 generates uniform heat radiation, which heats the shear container 202 and the asphalt and modifiers placed inside the shear container 202 to a set temperature and maintains it.

[0036] In this embodiment: the sealing component 3 includes a flipping component that can move with the rotating rod 106 to facilitate the opening and closing of the opening above the constant temperature oven 201, a sealing component that can further prevent the heat loss of the environment where the asphalt is located, and a transmission component that can transmit the height change of the rotating rod 106 to the flipping component.

[0037] The flipping component includes a ring frame 301 fixedly connected to the upper side of the constant temperature oven 201, and flip covers 302 movably connected to both sides of the ring frame 301. The transmission component includes a sleeve 309 fixedly connected to the outer side of the rotating rod 106, a buckle 310 movably installed on the outer side of the sleeve 309, and a telescopic rod 311 movably installed between the buckle 310 and the flip cover 302. The flipping component also includes multiple air inlets 303 integrally formed on one side of the flip cover 302, a suction tube 304 fixedly connected to the other side of the flip cover 302, and a plug cap 305 provided at one end of the suction tube 304. The sealing component includes a sealing ring 306 fixedly connected to the upper side of the ring frame 301, a carbon sealing ring 307 fixedly connected to the flip cover 302, and sealing gaskets 308 fixedly connected to the flip cover 302 at both the front and rear of the carbon sealing ring 307.

[0038] The flip cover 302 has a hollow structure. Two sliding grooves are provided on the side of the flip cover 302 near the tube 304. The ring frame 301 is rotatably connected to the flip cover 302. A pin is provided between the two sliding grooves of the flip cover 302 and the telescopic end of the telescopic rod 311, which passes through the two sliding grooves. The pin is slidably connected to the flip cover 302 and can rotate around its own axis in the sliding groove. The buckle 310 is composed of two symmetrical parts. The sleeve 309 is slidably connected to the buckle 310 and the buckle 310 can rotate around the axis of the rotating rod 106 relative to the sleeve 309. The buckle 310 is rotatably connected to the telescopic rod 311. The inner diameter of the carbon sealing ring 307 is the same as the outer diameter of the rotating rod 106.

[0039] Two identical flip covers 302 are installed on the constant temperature oven 201 via a ring frame 301, which can respectively cover the open position of the constant temperature oven 201. The flip covers 302, which are hollow inside, have an air inlet 303 on one side and a suction pipe 304 on the other side, allow an external exhaust gas purification device with a vacuum function to draw air and exhaust gas from outside the reaction assembly 2 after the flip cover 302 is fastened and connected to the suction pipe 304 in place of the plug 305. When the flip cover 302 is fastened, the sealing ring 306 and the sealing gasket 308 respectively raise the ring frame 301 and the flip cover 302. The sealing effect of the contact parts of the cover 302 and the contact parts of the two flip covers 302 is similar. The sealing effect between the rotating rod 106, which passes through the flip cover 302 and is rotatable, and the flip cover 302 is improved by the carbon sealing ring 307. The buckle 310, which can rotate and slide up and down relative to the sleeve 309, cooperates with the flip cover 302 to install the telescopic rod 311. The telescopic rod 311, which has a tendency to move towards the flip cover 302 by means of the built-in spring so that the telescopic end that is not subjected to external force has a tendency to move, transmits the change in height of the buckle 310 and the sleeve 309 to the flip cover 302 after changing the direction of the height change when the rotating rod 106 rises and falls.

[0040] Working principle: When this device is installed for the isothermal shear test of modified asphalt, after removing one of the plugs 305, the external exhaust gas purification equipment with vacuum function can be connected to the suction pipe 304 previously connected to the plug 305.

[0041] After the shear test begins, the constant temperature oven 201 can be started to preheat it. Then, an appropriate amount of asphalt and modifier are placed in the shear container 202. After that, the hydraulic cylinder 102 is used to flip and close the flap 302, so that the shear container 202 and the asphalt and modifier inside can statically swell at a suitable temperature for a certain period of time. After the static swelling is completed, the power unit 105 can be started to drive the rotating rod 106 connected to the shear head 107 to rotate at high speed, so that the shear head 107 shears the asphalt and modifier at high speed until the modifier is fully broken and dispersed into the asphalt matrix.

[0042] When the hydraulic cylinder 102 operates to adjust the height of the shear head 107, the height change of the rotating rod 106 connected to the shear head 107 will be transmitted to the flap 302 in sequence through the sleeve 309, the buckle 310, and the telescopic rod 311, so that the opening of the flap 302 is related to the height of the rotating rod 106. The telescopic rod 311, whose length is variable, and the buckle 310, which can slide and rise relative to the sleeve 309, can also cause the opening of the flap 302 to change slightly due to external force intervention when the rotating rod 106 is within a specific height range and has not risen or fallen. Therefore, the staff can adjust the opening of the flap 302 more effortlessly and conveniently according to the reaction progress.

[0043] In addition, since the gaps between the ring frame 301 and the flip cover 302, the gaps between the two flip covers 302, and the gaps between the rotating rod 106 and the flip cover 302 are filled by the sealing ring plate 306, the sealing gasket 308, and the carbon sealing ring 307 respectively during the shearing process, when the external exhaust gas purification equipment with vacuum function is running, the air in the closed environment where the shearing container 202 is located and the exhaust gas generated by the modification reaction will be sucked into the flip cover 302 through the air inlet 303 on the flip cover 302 connected to the exhaust gas purification equipment, and then extracted through the extraction pipe 304. This will eliminate the air in the bubbles inside the asphalt and the air in the pores on the surface of the modifier, enhance the combination of the two, and purify the harmful gases such as benzo[a]pyrene released by heating the asphalt, thereby reducing environmental pollution.

[0044] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A modified asphalt isothermal shear test apparatus, characterized in that: It includes a shearing assembly (1) that allows the modifier to be fully mixed with the asphalt matrix, a reaction assembly (2) that provides a suitable environment for the modification reaction is provided above the shearing assembly (1), and a sealing assembly (3) that can be easily operated to maintain the reaction temperature is provided above the reaction assembly (2). The shearing assembly (1) includes a rotating rod (106). The reaction assembly (2) includes a constant temperature oven (201) disposed below the rotating rod (106). The sealing assembly (3) includes a flipping component that can move with the rotating rod (106) to conveniently control the opening and closing of the opening above the constant temperature oven (201), a sealing component that can further prevent heat loss from the environment where the asphalt is located, and a transmission component that can transmit the height change of the rotating rod (106) to the flipping component. The flipping component includes a ring frame (301) fixedly connected to the upper side of the constant temperature oven (201), and flip covers (302) are movably connected to both sides of the ring frame (301). The transmission component includes a sleeve (309) fixedly connected to the outer side of the rotating rod (106), a buckle (310) is movably installed on the outer side of the sleeve (309), and a telescopic rod (311) is movably installed between the buckle (310) and the flip cover (302).

2. The modified asphalt isothermal shear test apparatus according to claim 1, characterized in that: The flip-up component also includes multiple air inlets (303) integrally formed on one side of the flip cover (302), and a suction tube (304) is fixedly connected to the other side of the flip cover (302), with a plug (305) provided at one end of the suction tube (304).

3. The modified asphalt isothermal shear test apparatus according to claim 2, characterized in that: The sealing element includes a sealing ring (306) fixedly connected to the upper side of the ring frame (301), a carbon sealing ring (307) fixedly connected to the flip cover (302), and sealing gaskets (308) fixedly connected to the flip cover (302) on both the front and rear sides of the carbon sealing ring (307).

4. The modified asphalt isothermal shear test apparatus according to claim 2, characterized in that: The flip cover (302) has a hollow structure, and two sliding grooves are provided on the side of the flip cover (302) near the pull tube (304).

5. The modified asphalt isothermal shear test apparatus according to claim 4, characterized in that: The ring frame (301) is rotatably connected to the flip cover (302). A pin is provided between the two sliding grooves of the flip cover (302) and the telescopic end of the telescopic rod (311) through the two sliding grooves. The pin is slidably connected to the flip cover (302) and can rotate around its own axis in the sliding groove.

6. The modified asphalt isothermal shear test apparatus according to claim 5, characterized in that: The buckle (310) consists of two symmetrical parts. The sleeve (309) is slidably connected to the buckle (310), and the buckle (310) can rotate relative to the sleeve (309) about the axis of the rotating rod (106). The buckle (310) is rotatably connected to the telescopic rod (311).

7. The modified asphalt isothermal shear test apparatus according to claim 3, characterized in that: The inner diameter of the carbon sealing ring (307) is the same as the outer diameter of the rotating rod (106).

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