CN219417472U - Testing system for asphalt humidity performance - Google Patents
Testing system for asphalt humidity performance Download PDFInfo
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- CN219417472U CN219417472U CN202321601030.9U CN202321601030U CN219417472U CN 219417472 U CN219417472 U CN 219417472U CN 202321601030 U CN202321601030 U CN 202321601030U CN 219417472 U CN219417472 U CN 219417472U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The utility model discloses a testing system for asphalt humidity performance, which relates to the technical field of asphalt material test and detection, and comprises a testing vessel, a detection assembly and a controller, wherein the testing vessel is sealed with a sealing cover; the detection assembly comprises an adjusting frame, a detection sensor and a driver, wherein one end of the adjusting frame connected with the detection sensor is rotatably provided with a movably sealed penetrating sealing cover, the detection sensor is positioned in the test vessel, the detection sensor is arranged on the adjusting frame, the driver comprises a first driving part and a second driving part, the first driving part is used for driving the adjusting frame to vertically reciprocate and linearly move, and the second driving part is used for driving the adjusting frame to horizontally reciprocate and rotate; the controller is in communication connection with the detection sensor, the first driving part and the second driving part. The test system controls the adjusting frame in an automatic mode, so that the detection sensor can change the corresponding position and the pose in the detection vessel, and the purpose of flexibly adjusting the test point position in the test process is achieved.
Description
Technical Field
The utility model relates to the technical field of asphalt material test and detection, in particular to a testing system for asphalt humidity performance.
Background
Many researches show that after the asphalt mixture is paved on a pavement, the service performance of the asphalt mixture is easily gradually reduced under the combined action of driving load, temperature and humidity, for example, the phenomenon of water damage of the asphalt pavement is caused. The aggregate with the asphalt mixture has certain water absorption, and the asphalt cement has organic characteristics, so that the asphalt mixture has humidity sensitivity, the cohesiveness of an asphalt matrix and the adhesiveness between asphalt and the aggregate are influenced by moisture, the interfacial surface energy is reduced due to the existence of the moisture, and the asphalt mixture is extremely easy to be damaged by water. Therefore, it is important to control the humidity of the service environment in which the asphalt mixture is located.
In the existing asphalt performance test equipment, most of asphalt materials are only analyzed and researched through different sensors (such as a humidity sensor, a pressure sensor, a temperature sensor and the like), and aiming at different types of asphalt mixtures, the sensors are basically arranged in an asphalt containing container, or fixed point positions are selected, or the position of a test point position is adjusted before the next test is carried out, the asphalt performance test equipment does not have the function of point position adjustment in the test process, and the sealing performance of the test is easily influenced when the conventional adjustment is adopted, so that the requirements of quick test and reliable test of different asphalt mixtures cannot be well met.
In view of this, the present application is specifically proposed.
Disclosure of Invention
The utility model aims to provide a testing system for asphalt humidity performance, which realizes control of an adjusting frame in an automatic mode, so that a detection sensor can change corresponding positions and positions in a detection vessel, thereby meeting the purpose of flexibly adjusting a testing point position in a testing process, and meeting the requirement of a reliable test due to reliable sealing performance in the adjusting process.
Embodiments of the present utility model are implemented as follows:
a testing system for the humidity performance of asphalt comprises a testing vessel, a detection assembly and a controller, wherein the testing vessel provides a space for accommodating asphalt mixture, and a sealing cover is sealed at an opening of the testing vessel; the detection assembly comprises an adjusting frame, a detection sensor and a driver, the detection sensor is positioned in the test vessel, the detection sensor is mounted on the adjusting frame, the driver comprises a first driving part and a second driving part, the first driving part is used for driving the adjusting frame to vertically reciprocate and linearly, and the second driving part is used for driving the adjusting frame to horizontally reciprocate and rotate; the controller is in communication connection with the detection sensor, and the electric control parts of the first driving part and the second driving part are both in communication connection with the controller; wherein, the closing cap is rotatably worn to establish to the one end that detects sensor is connected to the alignment jig, and the department of wearing of closing cap is provided with movable seal.
In an alternative embodiment, the adjusting frame comprises a hollow first adjusting rod and a second adjusting rod, the second adjusting rod is rotatably and slidably arranged in the inner cavity of the first adjusting rod, and the inner cavity of the second adjusting rod is used for detecting the sensor to perform wiring; the first driving part is used for driving the second adjusting rod to vertically slide relative to the first adjusting rod, and the second driving part is used for driving the second adjusting rod to horizontally rotate relative to the first adjusting rod in the axial direction.
In an alternative embodiment, the pipe wall of the second adjusting rod is provided with an adjusting head, the pipe wall of the first adjusting rod is provided with a first adjusting groove and a second adjusting groove, the groove direction of the first adjusting groove is consistent with the axial direction of the first adjusting rod, the groove direction of the second adjusting groove is circumferentially arranged along the side wall of the first adjusting rod, the first adjusting groove is provided with a node connected with the second adjusting groove, the first driving part is used for driving the adjusting head to slide along the trend of the first adjusting groove, and the second driving part is used for driving the adjusting head to slide along the trend of the second adjusting groove.
In an alternative embodiment, one end of the second regulating groove is connected with the first regulating groove through a node, and the other end is in the form of a blind groove.
In an alternative embodiment, the second regulating grooves have two groups, and different ends of the two groups of second regulating grooves are connected with the nodes.
In an alternative embodiment, the first driving part comprises a screw rod assembly and a first servo motor, a screw seat of the screw rod assembly is connected with the adjusting head, the screw rod axial direction of the screw rod assembly is consistent with the trend of the first adjusting groove, and the first servo motor is in transmission connection with a screw nut of the screw rod assembly.
In an alternative embodiment, the second driving part comprises a rotating frame and a second servo motor, the rotating frame is rotatably sleeved on the first adjusting rod, the rotating frame is connected with the adjusting head through the first driving part, and the second servo motor is used for driving the rotating frame to rotate along the axial direction of the first adjusting rod.
In an alternative embodiment, the housing of the screw assembly is integrated with the swivel mount.
In an alternative embodiment, the device further comprises a support, a clamping assembly used for clamping the first adjusting rod is arranged on the support, the clamping assembly comprises a fixing portion and a clamping portion, the fixing portion is connected between the support and the clamping portion, and the clamping portion is provided with a clamping opening matched with the cross section of the first adjusting rod.
In an alternative embodiment, the clamping part comprises a hoop and a locking rod, the hoop is rotatably sleeved on the first adjusting rod, a gap is formed on one side of the hoop, the locking rod is used for adjusting the interval between hoop ends on two sides of the gap, and the fixing part comprises two flexible connecting rods which are fixedly connected with the hoop ends on two sides of the gap respectively.
The embodiment of the utility model has the beneficial effects that:
the testing system for the asphalt humidity performance provided by the embodiment of the utility model can drive the first driving part and the second driving part to act through the controller, so that the adjusting frame can vertically slide and/or horizontally rotate, the position and the pose of the detection sensor which is integrated on the adjusting frame and is positioned in the testing vessel can be changed in the testing vessel, the purpose of changing the testing point position on line is achieved, off-line adjustment is not needed, the sealing performance of the sealing cover is not influenced, and finally the requirements of a quick test and a reliable test are met.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a test system according to an embodiment of the present utility model;
FIG. 2 is a schematic view of a portion of the test system of FIG. 1;
fig. 3 is an enlarged schematic diagram of the test system of fig. 2 at a.
Icon: 1-a test vessel; 2-capping; 3-adjusting frames; 4-a first driving part; 5-a second driving part; 6-a bracket; 7-a clamping assembly; 31-a first adjusting rod; 32-a second adjusting rod; 41-screw rod; 42-wire holder; 43-a housing; 44-a first servomotor; 51-a rotating rack; 52-a second servo motor; 71-a hoop; 72-notch; 73-locking bar; 74-flexible links; 311-a first adjustment tank; 312-a second adjustment tank; 321-adjusting the head.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "parallel," "perpendicular," and the like, do not denote that the components are required to be absolutely parallel or perpendicular, but may be slightly inclined. For example, "parallel" merely means that the directions are more parallel than "perpendicular" and does not mean that the structures must be perfectly parallel, but may be slightly tilted.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Examples: referring to fig. 1-3, the testing system for asphalt humidity performance provided in this embodiment includes a testing vessel 1, a detecting component and a controller, the testing vessel 1 provides a space for accommodating asphalt mixture, and a sealing cover 2 is sealed at an opening of the testing vessel 1 to form a sealing environment, so as to ensure reliability of a testing result.
The detection assembly comprises an adjusting frame 3, a detection sensor and a driver, wherein the detection sensor is positioned in the test vessel 1, the detection sensor is at least one of a humidity sensor, a pressure sensor and a temperature sensor, and is arranged on the adjusting frame 3 by taking the humidity sensor as an example, the driver comprises a first driving part 4 and a second driving part 5, the first driving part 4 is used for driving the adjusting frame 3 to do vertical reciprocating linear motion, and the second driving part 5 is used for driving the adjusting frame 3 to do horizontal reciprocating rotary motion, so that the aim that the adjusting frame 3 drives the detection sensor to change positions and positions of the test vessel 1 is fulfilled.
The controller is in communication connection with the detection sensor, and the electric control parts of the first driving part 4 and the second driving part 5 are in communication connection with the controller, so that the test system has an automatic control basis. In order not to affect the sealing performance in the whole test vessel 1 in the process of realizing the vertical movement and/or the horizontal rotation, one end of the adjusting frame 3 connected with the detection sensor rotatably penetrates through the sealing cover 2, and a movable seal is arranged at the penetrating position of the sealing cover 2, for example, a rotary shaft seal is adopted.
Through the technical scheme, the point position of the detection sensor can be flexibly adjusted in the process of asphalt mixture testing, compared with the traditional testing equipment, the point position adjustment mode is more flexible in a mode that offline is needed, the sealing effect of the opening in the testing vessel 1 is not affected in the process of adjusting the point position, and the testing result is reliable.
The adjusting rod 3 adopts a two-stage adjustment mode, specifically, the adjusting bracket 3 includes a hollow first adjusting rod 31 and a second adjusting rod 32, the second adjusting rod 32 is rotatably and slidably disposed in the inner cavity of the first adjusting rod 31, that is, the second adjusting rod 32 can vertically slide and horizontally rotate relative to the first adjusting rod 31. The inner cavity of the second adjusting rod 32 is used for detecting the running line of the sensor, namely, the cable of the sensor passes through the inner cavity of the second adjusting rod 32. The first driving part 4 is used for driving the second adjusting rod 32 to vertically slide relative to the first adjusting rod 31, and the second driving part 5 is used for driving the second adjusting rod 32 to horizontally rotate relative to the axial direction of the first adjusting rod 31. Therefore, the purpose of detecting the position and the pose change of the sensor is realized by utilizing the mode that the second adjusting rod 32 and the first adjusting rod 31 are mutually integrated into two-stage adjustment.
On the basis of the above scheme, in order to realize the stable adjusting function of the second adjusting rod 32 relative to the first adjusting rod 31, an adjusting head 321 is formed on the pipe wall of the second adjusting rod 32, a first adjusting groove 311 and a second adjusting groove 312 are formed on the pipe wall of the first adjusting rod 31, and the groove direction of the first adjusting groove 311 is consistent with the axial direction of the first adjusting rod 31, namely, the first adjusting groove 311 is vertical; the second adjusting groove 312 is circumferentially arranged along the side wall of the first adjusting rod 31, namely, the second adjusting groove 312 is an annular groove, the first adjusting groove 311 is provided with a node connected with the second adjusting groove 312, namely, the first adjusting groove 311 is communicated with the second adjusting groove 312, the first driving part 4 is used for driving the adjusting head 321 to slide along the trend of the first adjusting groove 311, and the second driving part 5 is used for driving the adjusting head 321 to slide along the trend of the second adjusting groove 312. That is, the adjustment head 321 can be slidably positioned in the first adjustment groove 311 or the second adjustment groove 312 by the action of the first driving part 4 and the second driving part 5, or can be positioned in the junction between the first adjustment groove 311 and the second adjustment groove 312.
Through the technical scheme, the adjusting head 321 is formed on the pipe wall of the second adjusting rod 32, the position of the second adjusting rod 32 can be changed by adjusting the position of the adjusting head 321, for example, the adjusting head 321 slides along the first adjusting groove 311 to change the vertical position of the second adjusting rod 32, the adjusting head 321 slides along the second adjusting groove 312 to change the detecting direction of the second adjusting rod 32, and therefore the purpose of following adjustment of the detecting sensor is achieved.
In some embodiments, the travel of the vertical position change may be controlled by determining the length of the first adjustment slot 311. The maximum rotation angle may also be determined by determining the arc length of the second adjustment groove 312, i.e. it means that one end of the second adjustment groove 312 is connected to the first adjustment groove 311 by a node, where the other end is in the form of a blind groove as a starting point for adjusting the rotation direction, and the blind end is an ending point for adjusting the rotation direction, and the longer the blind end passes through the arc length relative to the node, the larger the limit of the rotation angle is, for example, the central angle corresponding to the rotation arc length is 335 °.
On the basis of the above scheme, in order to solve the rotation blind area which is not realized by the rest, the horizontal rotation effect of 360 degrees is realized, two groups of second adjusting grooves 312 are arranged, and different ends of the two groups of second adjusting grooves 312 are connected with the nodes. That is, the open ends of the two sets of second adjusting grooves 312 are in a left-right form, so that the adjusting head 321 can rotate from the left side or the right side as a starting point, and the central angle of the two sets of second adjusting grooves 312 is larger than 180 degrees, thereby solving the problem of the blind rotation area.
In some embodiments, the first driving part 4 and the second driving part 5 may be in the form of motor-driven operation members, and the operation members may be gear racks, screw assemblies, link mechanisms, crank blocks, linear retractors, and the like. Specifically, referring to fig. 2 again, the first driving portion 4 includes a screw assembly and a first servo motor 44, and the screw seat 42 of the screw assembly is connected, for example, detachably connected, to the adjusting head 321. The axial direction of the screw rod 41 of the screw rod assembly is consistent with the trend of the first adjusting groove 311, the first servo motor 44 is in transmission connection with the screw of the screw rod assembly, for example, a gear is used as intermediate transmission, the first servo motor 44 drives the gear to rotate, the gear is meshed with the external thread of the screw, the screw is driven to rotate, the screw drives the screw rod 41 to move up and down through the internal thread, and therefore the purpose that the adjusting head 321 slides up and down is achieved.
In addition, the second driving part 5 includes a rotating frame 51 and a second servo motor 52, and the rotating frame 51 is rotatably sleeved on the first adjusting rod 31, so that the first adjusting rod 31 is concentrically arranged. The rotating frame 51 is connected with the adjusting head 321 through the first driving part 4, that is, the first driving part 4 is used as an intermediate connecting piece between the adjusting head 321 and the rotating frame 51, and when the rotating frame 51 rotates, the first driving part 4 and the adjusting head 321 can be driven to synchronously rotate. Specifically, for example, the housing 43 of the screw assembly is integrated with the rotating frame 51, thereby achieving the purpose of the first driving part 4 as an intermediate connection. The second servo motor 52 is configured to drive the rotating frame 51 to rotate along the axial direction of the first adjusting rod 31, for example, an output shaft of the second servo motor 52 may be integrated in the axial direction of the first adjusting rod 31, and the output shaft and the inner ring of the rotating frame 51 may be fixed by a ring member. The controller, the first servo motor 44 and the second servo motor 52 are controlled by a PLC, so as to achieve the purpose of automatically controlling the second adjusting lever 32.
On the basis of the scheme, the aim of preliminary adjustment of the position of the detection sensor is fulfilled for the situation that the first adjusting rod 31 can also realize horizontal rotation, namely, the first adjusting rod 31 drives the whole second adjusting rod 32, the first driving part 4 and the second driving part 5 to integrally rotate. In this embodiment, in order to realize stable control of the first adjusting lever 31 before and after the rotation adjustment, please refer to fig. 3 again, the test system further includes a bracket 6, a clamping assembly 7 for clamping the first adjusting lever 31 is disposed on the bracket 6, the clamping assembly 7 includes a fixing portion and a clamping portion, the fixing portion is connected between the bracket 6 and the clamping portion, the clamping portion has a clamping opening matching the cross-sectional shape of the first adjusting lever 31, and the state of the first adjusting lever 31 before and after the rotation is maintained in such a horizontal movable clamping manner.
The fixing portion may be rod-shaped, block-shaped or plate-shaped, and is mainly capable of realizing connection between the clamping portion and the bracket 6, and the clamping portion is mainly of a ring-shaped structure with a clamping opening, specifically, the clamping portion includes a hoop 71 and a locking rod 73, the hoop 71 is rotatably sleeved on the first adjusting rod 31, one side of the hoop 71 forms a notch 72, and the locking rod 73 is used for adjusting the interval between hoop ends at two sides of the notch, that is, the size of the notch 72 is controlled, and the degree of the hoop 71 clasping the first adjusting rod 31 can be adjusted. The fixing portion includes two flexible connecting rods 74, where the flexible connecting rods 74 are made of hard plastic, and have a certain elastic deformation, and the two flexible connecting rods 74 are fixedly connected with ends of the hoops 71 on two sides of the notch 72, that is, two free ends of the hoops 71 are all connected with the support 6 through the flexible connecting rods 74. The locking rod 73 adopts a movable locking structure, and the loosening adjustment of the hoop 71 is realized by screwing the tightness degree of the locking rod 73.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model. It should be noted that the structures or components illustrated in the drawings are not necessarily drawn to scale, and that descriptions of well-known components and processing techniques and procedures are omitted so as not to unnecessarily limit the present utility model.
Claims (10)
1. A system for testing the moisture performance of asphalt, comprising:
the test vessel provides a space for accommodating the asphalt mixture, and a sealing cover is sealed at an opening of the test vessel;
the detection assembly comprises an adjusting frame, a detection sensor and a driver, wherein the detection sensor is positioned in the test vessel and is installed on the adjusting frame, the driver comprises a first driving part and a second driving part, the first driving part is used for driving the adjusting frame to do vertical reciprocating linear motion, and the second driving part is used for driving the adjusting frame to do horizontal reciprocating rotary motion; and
the controller is in communication connection with the detection sensor, and the electric control parts of the first driving part and the second driving part are both in communication connection with the controller;
the sealing cover is rotatably arranged at one end of the adjusting frame, which is connected with the detection sensor, and a movable seal is arranged at the penetrating position of the sealing cover.
2. The asphalt humidity performance test system according to claim 1, wherein said adjustment rack comprises a hollow first adjustment lever and a second adjustment lever, said second adjustment lever being rotatably and slidably disposed in an interior cavity of said first adjustment lever, and an interior cavity of said second adjustment lever being for said detection sensor to trace; the first driving part is used for driving the second adjusting rod to vertically slide relative to the first adjusting rod, and the second driving part is used for driving the second adjusting rod to horizontally rotate relative to the axial direction of the first adjusting rod.
3. The asphalt humidity performance test system according to claim 2, wherein an adjusting head is formed on a pipe wall of the second adjusting rod, a first adjusting groove and a second adjusting groove are formed on a pipe wall of the first adjusting rod, a groove direction of the first adjusting groove is consistent with an axial direction of the first adjusting rod, a groove direction of the second adjusting groove is circumferentially arranged along a side wall of the first adjusting rod, the first adjusting groove is provided with a node connected with the second adjusting groove, the first driving part is used for driving the adjusting head to slide along a trend of the first adjusting groove, and the second driving part is used for driving the adjusting head to slide along a trend of the second adjusting groove.
4. A system for testing asphalt moisture properties according to claim 3, wherein one end of the second regulating tank is connected to the first regulating tank by the node, and the other end is in the form of a blind tank.
5. The asphalt moisture performance testing system of claim 4, wherein said second conditioning slots have two sets, different ends of said second conditioning slots of two sets being connected to said node.
6. A testing system for asphalt humidity performance according to claim 3, wherein the first driving part comprises a screw rod assembly and a first servo motor, a screw seat of the screw rod assembly is connected with the adjusting head, a screw rod axial direction of the screw rod assembly is consistent with a trend of the first adjusting groove, and the first servo motor is in transmission connection with a screw nut of the screw rod assembly.
7. The system according to claim 6, wherein the second driving part comprises a rotating frame and a second servo motor, the rotating frame is rotatably sleeved on the first adjusting rod, the rotating frame is connected with the adjusting head through the first driving part, and the second servo motor is used for driving the rotating frame to rotate along the axial direction of the first adjusting rod.
8. The asphalt moisture performance testing system of claim 7, wherein a housing of said screw assembly is integrated with said spin stand.
9. The asphalt humidity performance test system according to claim 2, further comprising a bracket, wherein a clamping assembly for clamping the first adjusting rod is provided on the bracket, the clamping assembly comprises a fixing portion and a clamping portion, the fixing portion is connected between the bracket and the clamping portion, and the clamping portion has a clamping opening matched with the cross-sectional shape of the first adjusting rod.
10. The asphalt humidity performance testing system according to claim 9, wherein the clamping portion comprises a hoop and a locking rod, the hoop is rotatably sleeved on the first adjusting rod, a gap is formed in one side of the hoop, the locking rod is used for adjusting the interval between hoop ends on two sides of the gap, and the fixing portion comprises two flexible connecting rods which are fixedly connected with the hoop ends on two sides of the gap respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321601030.9U CN219417472U (en) | 2023-06-25 | 2023-06-25 | Testing system for asphalt humidity performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321601030.9U CN219417472U (en) | 2023-06-25 | 2023-06-25 | Testing system for asphalt humidity performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219417472U true CN219417472U (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321601030.9U Active CN219417472U (en) | 2023-06-25 | 2023-06-25 | Testing system for asphalt humidity performance |
Country Status (1)
| Country | Link |
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| CN (1) | CN219417472U (en) |
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2023
- 2023-06-25 CN CN202321601030.9U patent/CN219417472U/en active Active
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