A test vibration excitation device
By designing a combined device consisting of a vibration base plate, sliding rod, limiting block, and excitation hammer, the problems of inaccurate lifting of heavy objects and uneven force distribution upon landing were solved, thereby improving the accuracy and safety of porosity measurement of the filling material.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NORTHWEST ENGINEERING CORPORATION LIMITED
- Filing Date
- 2025-07-24
- Publication Date
- 2026-07-03
AI Technical Summary
In existing technologies, it is difficult to precisely control the lifting of heavy objects to a designated height. When multiple people are operating the equipment, the force on the object upon landing is uneven, making operation inconvenient and posing safety hazards. This affects the accuracy and safety of the porosity measurement of the fill material.
Design a test vibration excitation device, including an excitation base plate, a sliding rod, a limiting block and an excitation hammer. The limiting block and the excitation base plate work together to ensure that the excitation hammer falls at a consistent height, and the sliding rod prevents deflection. A grip is provided for easy operation, and the device is detachable for easy movement.
This improved the accuracy and efficiency of porosity measurement in the filling material, ensured the convenience and safety of operation, and reduced safety hazards.
Smart Images
Figure CN224443645U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of testing equipment for water conservancy projects, and more specifically, to a testing and detection vibration excitation device. Background Technology
[0002] In related technologies, the mass-added method for determining the density of fill is a field test in geotechnical testing. This test provides relevant parameters of the dam's compaction effect, offering data support for the quality of the fill construction. In rockfill dam construction, the mass-added method uses vibration testing technology to determine relevant parameters of the fill, and then rapidly obtains the porosity through fitting analysis. Compared to traditional pit-digging testing, this method has the advantages of being fast, non-destructive, and efficient, and is particularly suitable for large-diameter fill materials such as rockfill and transition materials. The specific operation involves connecting the instruments and equipment, allowing a certain mass of weight to fall freely and impact the dam body, collecting vibration data, and analyzing wave velocity and frequency to calculate the porosity of the fill.
[0003] During the experiment, a 50kg weight needs to be manually lifted to a height of 40cm. This is typically done by multiple workers simultaneously lifting the weight to a designated position and releasing it at the same time. The weight then falls freely into the designated test area, generating a vibrational force. Each test is repeated 6-8 times. However, this experimental process has the following problems: 1. It is difficult for workers to accurately determine the exact 40cm height each time they lift the weight. 2. With multiple workers operating the test, it is difficult to ensure uniform force distribution upon impact with the ground each time the weight lands. 3. When lifting the weight to a height of 40cm, workers must remain bent over, which is inconvenient. 4. There are no safety measures around the weight when it lands, posing a safety hazard. Therefore, there is an urgent need to design a device to improve upon these problems.
[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content
[0005] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a test vibration excitation device to improve the accuracy of porosity measurement of fill materials and facilitate the testing of fill material porosity.
[0006] According to one aspect of this disclosure, a test vibration excitation device is provided, the excitation device comprising an excitation base plate, a sliding rod, a limiting block, and an excitation hammer;
[0007] One end of the sliding rod is connected to the excitation base plate;
[0008] The limiting block is connected to the other end of the sliding rod, and the limiting block and the vibrating base plate form a vibration space on their respective sides;
[0009] The excitation hammer is slidably connected to the sliding rod and is located within the vibration space.
[0010] According to one embodiment of this disclosure, the vibration base plate includes a first frustum, a second frustum, and a connecting rod;
[0011] The first frustum and the second frustum are connected on their adjacent sides by the connecting rod;
[0012] The end of the sliding rod away from the limiting block is connected to the first truncated cone, and the connecting rod is coaxially arranged with the sliding rod.
[0013] According to one embodiment of this disclosure, the first frustum, the connecting rod, and the second frustum are coaxially arranged.
[0014] Wherein, the cross-section of the first frustum is smaller than the cross-section of the second frustum;
[0015] The cross-section of the connecting rod is smaller than the cross-section of the first frustum.
[0016] According to one embodiment of this disclosure, the vibration base plate further includes a plurality of reinforcing columns;
[0017] One end of the reinforcing column is connected to the connecting rod, and the other end is connected to the second frustum. A plurality of the reinforcing columns are evenly arranged along the axial direction of the connecting rod.
[0018] According to one embodiment of this disclosure, the sliding rod, the limiting block, and the excitation base plate are detachably connected.
[0019] According to one embodiment of the present disclosure, the first cylindrical platform has a first mounting hole, and the limiting block that is close to the first cylindrical platform has a second mounting hole.
[0020] The sliding rod has a first mounting post on the side near the limiting block, and the first mounting post can be configured to cooperate with the first mounting hole;
[0021] The sliding rod has a second mounting post on the side near the first truncated cone, and the second mounting post is configured to cooperate with the second mounting hole.
[0022] According to one embodiment of this disclosure, the first mounting post, the sliding rod, and the second mounting post are coaxially arranged.
[0023] The cross-sections of the first mounting post and the second mounting post are both smaller than the cross-section of the sliding rod.
[0024] According to one embodiment of this disclosure, the excitation hammer has a plurality of gripping portions;
[0025] The plurality of gripping parts are evenly arranged along the circumference of the excitation hammer.
[0026] According to one embodiment of this disclosure, the limiting block includes a first column and a second column;
[0027] The first column and the second column are coaxially connected, and the second mounting hole is located on the first column.
[0028] According to one embodiment of this disclosure, the cross-section of the first column is larger than the cross-section of the second column.
[0029] Beneficial effects:
[0030] 1. By setting limit blocks and excitation base plates, the height of the excitation hammer falls is consistent, which helps to improve the accuracy of porosity measurement of the filling material; at the same time, the excitation hammer is slidably connected to the sliding rod, so that the excitation hammer will not deflect its direction when falling, and the contact surface of the remaining excitation base plates is subjected to uniform force, thereby further improving the accuracy of porosity measurement of the filling material.
[0031] 2. By setting a grip on the excitation hammer, it is easier for workers to raise and lower the excitation hammer, thereby improving the efficiency of measuring the porosity of the filling material.
[0032] 3. By detachably connecting the limiting block, sliding rod and excitation base plate, the excitation device can be moved and transported.
[0033] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description
[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.
[0035] Figure 1 This is a schematic diagram of the overall structure of the test vibration excitation device in one embodiment of the present disclosure.
[0036] Figure 2 This is a schematic diagram of the structure of the vibration base plate in one embodiment of the present disclosure.
[0037] Figure 3This is a schematic diagram of the sliding rod in one embodiment of the present disclosure.
[0038] Figure 4 This is a schematic diagram of the structure of the excitation hammer in one embodiment of the present disclosure.
[0039] Figure 5 This is a schematic diagram of the structure of the limiting block in one embodiment of the present disclosure.
[0040] Explanation of reference numerals in the attached figures:
[0041] 1. Vibration base plate; 11. First frustum; 111. First mounting hole; 12. Second frustum; 13. Connecting rod; 14. Reinforcing column; 2. Sliding rod; 21. Vibration space; 22. First mounting column; 23. Second mounting column; 3. Limiting block; 31. First column; 311. Second mounting hole; 32. Second column; 4. Excitation hammer; 41. Grip part; 42. Through hole. Detailed Implementation
[0042] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.
[0043] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.
[0044] In related technologies, when assessing the porosity of fill material, a 50kg weight is manually lifted to a height of 40cm. This is typically done by multiple workers who lift the weight to a designated position and release it simultaneously, allowing it to fall freely into the test area and generate vibration. Each test is repeated 6-8 times. However, this process has the following problems: 1. It is difficult for workers to accurately determine the 40cm height each time they lift the weight. 2. With multiple workers operating the test, it is difficult to ensure uniform force distribution upon impact with the ground. 3. When lifting the weight to 40cm, workers must remain bent over, which is inconvenient. 4. There are no safety measures in place when the weight falls, posing a safety hazard.
[0045] Based on this, the present disclosure provides a device for testing and detecting vibration excitation. See also Figure 1 The excitation device includes an excitation base plate 1, a sliding rod 2, a limiting block 3, and an excitation hammer 4; one end of the sliding rod 2 is connected to the excitation base plate 1; the limiting block 3 is connected to the other end of the sliding rod 2, and the side of the limiting block 3 and the excitation base plate 1 that are close to each other forms a vibration space 21; the excitation hammer 4 is slidably connected to the sliding rod 2 and is located in the vibration space 21.
[0046] In this embodiment, when the porosity of the fill material needs to be measured, the excitation device is placed at the measurement position of the fill material, and multiple workers jointly lift the excitation hammer 4. The excitation hammer 4 moves within the vibration space 21. When the excitation hammer 4 contacts the limiting block 3 (indicating that the height of the excitation hammer 4 has reached the measurement height), the workers simultaneously lower the excitation hammer 4, which falls freely within the vibration space 21. The freely falling excitation hammer 4 contacts the excitation base plate 1, causing the excitation base plate 1 to generate an excitation force. Vibration data is collected by relevant equipment, and wave velocity and frequency are analyzed to calculate the porosity of the fill material. The limiting block 3 and the excitation base plate 1 ensure that the height of the excitation hammer 4 remains consistent each time it falls, thus helping to improve the accuracy of the porosity measurement of the fill material. At the same time, the excitation hammer 4 is slidably connected to the sliding rod 2, so that the excitation hammer 4 will not deflect during its fall, thereby ensuring that the contact surface of the remaining excitation base plate 1 is subjected to uniform force, further improving the accuracy of the porosity measurement of the fill material.
[0047] In some embodiments of this disclosure, see Figure 1 , Figure 2 The excitation base plate 1 includes a first truncated cone 11, a second truncated cone 12, and a connecting rod 13; the first truncated cone 11 and the second truncated cone 12 are connected on their respective sides by the connecting rod 13; the end of the sliding rod 2 away from the limiting block 3 is connected to the first truncated cone 11, and the connecting rod 13 and the sliding rod 2 are coaxially arranged.
[0048] As an example, the material of the vibration base plate 1 can be steel.
[0049] In some embodiments of this disclosure, the first frustum 11, the connecting rod 13, and the second frustum 12 are coaxially arranged; wherein the cross-section of the first frustum 11 is smaller than the cross-section of the second frustum 12; and the cross-section of the connecting rod 13 is smaller than the cross-section of the first frustum 11.
[0050] It should be noted that, in the disclosed embodiment, the cross-section of the first frustum 11 is circular, and the cross-section of the second frustum 12 is also circular; the fact that the cross-section of the first frustum 11 is smaller than the cross-section of the second frustum 12 means that the diameter of the circular cross-section of the first frustum 11 is smaller than the diameter of the circular cross-section of the second frustum 12. When the excitation hammer 4 falls, the excitation hammer 4 contacts the first frustum 11, and the first frustum 11 transmits the excitation force to the second frustum 12. The second frustum 12 contacts the filling material, and the porosity of the filling material can be indirectly measured; the fact that the cross-section of the second frustum 12 is larger than the cross-section of the first frustum 11 can improve the stability of the excitation device, thereby improving the accuracy of the measurement of the porosity of the filling material to a certain extent.
[0051] As an example, the diameter of the cross section of the first frustum 11 can be 120mm, and the height of the first frustum 11 can be 600mm; the diameter of the cross section of the second frustum 12 can be 500mm, and the height of the second frustum 12 can be 30mm.
[0052] In some embodiments of this disclosure, see Figure 1 , Figure 2 The excitation base plate 1 also includes multiple reinforcing columns 14; one end of each reinforcing column 14 is connected to the connecting rod 13, and the other end is connected to the second frustum 12. The multiple reinforcing columns 14 are evenly arranged along the axial direction of the connecting rod 13. The reinforcing columns 14 can strengthen the connection between the connecting rod 13 and the second frustum 12, thereby further improving the stability of the excitation device.
[0053] As an example, four reinforcing columns 14 may be provided, with the four reinforcing columns 14 evenly arranged along the circumference of the connecting rod 13. It should be noted that in other embodiments, the number of reinforcing columns 14 is not limited to this, and this disclosure will not elaborate on this aspect.
[0054] In some embodiments of this disclosure, the sliding rod 2, the limiting block 3, and the excitation base plate 1 are detachably connected. This configuration allows for rapid on-site assembly of the excitation device when the porosity of the fill material needs to be measured, enabling quick detection of relevant parameters of the fill material. After the porosity of the fill material at this location is measured, the excitation device can be quickly disassembled and moved to the next measurement location, thus improving the ease of use of the excitation device.
[0055] In this embodiment, see Figure 2 , Figure 3 as well as Figure 5 The sliding rod 2, the limiting block 3, and the excitation base plate 1 can be disassembled and connected in the following way: a first mounting hole 111 is provided on the first truncated cone 11, and a second mounting hole 311 is provided on the limiting block 3 which is close to the first truncated cone 11; the sliding rod 2 has a first mounting post 22 on the side close to the limiting block 3, and the first mounting post 22 can be configured to cooperate with the first mounting hole 111; the sliding rod 2 has a second mounting post 23 on the side close to the first truncated cone 11, and the second mounting post 23 is configured to cooperate with the second mounting hole 311.
[0056] As an example, the first mounting hole 111 can be a circular hole with a diameter of 30 mm and a depth of 60 mm.
[0057] Specifically, when assembling the excitation device, the sliding rod 2 is moved, which drives the first mounting post 22 to move and extend the first mounting post 22 into the first mounting hole 111. Then, the excitation hammer 4 is installed on the sliding rod 2. Finally, the limiting block 3 is brought close to the second mounting post 23, which extends into the second mounting hole 311. In this way, the connection between the sliding rod 2, the limiting block 3, and the excitation base plate 1 can be realized.
[0058] As another example, the first mounting post 22, the sliding rod 2, and the second mounting post 23 are coaxially arranged; wherein the cross-sections of the first mounting post 22 and the second mounting post 23 are both smaller than the cross-section of the sliding rod 2.
[0059] It is understandable that the cross-section of the first mounting post 22 is circular, the cross-section of the second mounting post 23 is also circular, and the cross-section of the sliding rod 2 is also circular. The fact that the cross-sections of the first mounting post 22 and the second mounting post 23 are both smaller than the cross-section of the sliding rod 2 means that the diameters of the first mounting post 22 and the second mounting post 23 are smaller than the diameter of the sliding rod 2. This allows a step to be formed at the closer ends of the first mounting post 22 and the sliding rod 2. When the first mounting post 22 extends into the first mounting hole 111, the end of the sliding rod 2 can abut against the first frustum 11, thus improving the connection strength between the first mounting post 22 and the first frustum 11. Similarly, a step is also formed at one end of the second mounting post 23 and the sliding rod 2. When the second mounting post 23 extends into the second mounting hole 311, the end of the sliding rod 2 can abut against the limiting block 3, thus improving the strength between the second mounting post 23 and the limiting block 3.
[0060] As another example, the sliding rod 2 can be made of steel, with a circular cross-section. The diameter of the sliding rod 2 is 60mm, and its length is 500mm. The cross-section of the first mounting post 22 is the same size as that of the second mounting post 23, and both the first mounting post 22 and the second mounting post 23 have circular cross-sections. The diameter of the first mounting post 22 and the second mounting post 23 is 30mm, and their length is 60mm.
[0061] It should be noted that in some embodiments, the cross-section of the first mounting post 22 may be different from the cross-section of the second mounting post 23, which will not be elaborated in this disclosure.
[0062] In some embodiments of this disclosure, the excitation hammer 4 has a plurality of gripping portions 41; the plurality of gripping portions 41 are evenly arranged along the circumference of the excitation hammer 4.
[0063] As an example, see Figure 2 , Figure 4 The excitation hammer 4 can be made of steel, and its cross-section is circular with a diameter of 250mm and a height of 100mm. The excitation hammer 4 has a through hole 42, which allows the excitation hammer 4 to slide on the sliding rod 2 while maintaining uniform force on the first truncated cone 11 when it is in contact with it.
[0064] In one embodiment, the through hole 42 is a circular hole with a diameter of 60 mm.
[0065] As another example, the grip 41 can be configured as a column with a circular cross-section, the diameter of which can be 30 mm, and the length of which can be 140 mm.
[0066] Further, see Figure 4 Four grips 41 can be provided on the excitation hammer 4. The four grips 41 are evenly arranged along the circumference of the excitation hammer 4. When it is necessary to lift the excitation hammer 4, the operator can hold the grips 41 to lift the excitation hammer 4, which helps to improve the lifting efficiency of the excitation hammer 4.
[0067] In some embodiments of this disclosure, the limiting block 3 includes a first column 31 and a second column 32; the first column 31 and the second column 32 are coaxially connected, and the second mounting hole 311 is located on the first column 31.
[0068] As an example, the material of limit block 3 can be steel.
[0069] In some embodiments of this disclosure, see Figure 5The cross-section of the first column 31 is larger than the cross-section of the second column 32. This means that the cross-section of the first column 31 is circular, and the cross-section of the second column 32 is also circular. The statement that the cross-section of the first column 31 is larger than the cross-section of the second column 32 means that the diameter of the cross-section of the first column 31 is larger than the diameter of the cross-section of the second column 32. Thus, the steps formed by the first column 31 and the second column 32 facilitate the worker's gripping of the limiting block 3 and its installation on the second column 32.
[0070] As another example, the first column 31 has a circular cross-section, the diameter of the first column 31 can be 120mm, and the length of the first column 31 can be 20mm; the second column 32 has a circular cross-section, the diameter of the second column 32 can be 60mm, and the length can be 100mm.
[0071] In some embodiments, the second mounting hole 311 is a circular hole with a diameter of 30 mm and a depth of 60 mm.
[0072] The implementation principle of this application is described below:
[0073] First, the excitation device is assembled. The specific assembly steps are as follows: place the excitation base plate 1 at the detection position, then move the sliding rod 2 close to the first truncated cone 11, extend the first mounting column 22 into the first mounting hole 111, then install the excitation hammer 4 on the sliding rod 2, move the limiting block 3 close to the second mounting column 23, and extend the second mounting column 23 into the second mounting hole 311. When it is necessary to measure the relevant parameters of the filling body, raise the excitation hammer 4 so that the excitation hammer 4 contacts one side of the limiting block 3, and then lower the excitation hammer 4 at the same time. The excitation hammer 4 contacts the first truncated cone 11, and the first truncated cone 11 generates an excitation force and transmits the excitation force to the second truncated cone 12 and the filling body in sequence. The porosity of the filling body at this position is measured by relevant equipment to complete the detection of the filling body.
[0074] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.
Claims
1. A test vibration excitation device, characterized in that, The excitation device includes an excitation base plate, a sliding rod, a limiting block, and an excitation hammer; One end of the sliding rod is connected to the excitation base plate; The limiting block is connected to the other end of the sliding rod, and the limiting block and the vibrating base plate form a vibration space on their respective sides; The excitation hammer is slidably connected to the sliding rod and is located within the vibration space.
2. A test detection vibration excitation apparatus according to claim 1, wherein The vibration base plate includes a first frustum, a second frustum, and a connecting rod; The first frustum and the second frustum are connected on their adjacent sides by the connecting rod; The end of the sliding rod away from the limiting block is connected to the first truncated cone, and the connecting rod is coaxially arranged with the sliding rod.
3. The test vibration excitation device according to claim 2, characterized in that, The first frustum, the connecting rod, and the second frustum are coaxially arranged. Wherein, the cross-section of the first frustum is smaller than the cross-section of the second frustum; The cross-section of the connecting rod is smaller than the cross-section of the first frustum.
4. The test vibration excitation device according to claim 2, characterized in that, The vibration base plate also includes multiple reinforcing columns; One end of the reinforcing column is connected to the connecting rod, and the other end is connected to the second frustum. A plurality of the reinforcing columns are evenly arranged along the axial direction of the connecting rod.
5. The test vibration excitation device according to claim 1, characterized in that, The sliding rod, the limiting block, and the vibration base plate are detachably connected.
6. The test vibration excitation device according to claim 2, characterized in that, The first cylindrical platform has a first mounting hole, and the limiting block that is close to the first cylindrical platform has a second mounting hole; The sliding rod has a first mounting post on the side near the limiting block, and the first mounting post can be configured to cooperate with the first mounting hole; The sliding rod has a second mounting post on the side near the first truncated cone, and the second mounting post is configured to cooperate with the second mounting hole.
7. The test vibration excitation device according to claim 6, characterized in that, The first mounting post, the sliding rod, and the second mounting post are coaxially arranged. The cross-sections of the first mounting post and the second mounting post are both smaller than the cross-section of the sliding rod.
8. The test vibration excitation device according to claim 1, characterized in that, The excitation hammer has multiple gripping parts; The plurality of gripping parts are evenly arranged along the circumference of the excitation hammer.
9. The test vibration excitation device according to claim 6, characterized in that, The limiting block includes a first column and a second column; The first column and the second column are coaxially connected, and the second mounting hole is located on the first column.
10. The test vibration excitation device according to claim 9, characterized in that, The cross-section of the first column is larger than the cross-section of the second column.