Railway subgrade detection device

Abstract

The utility model provides a railway roadbed detection device relates to roadbed detection field, this railway roadbed detection device, including load board, the upper movable fixed clamping of load board has the guide rod, the outer surface sliding connection drop hammer of guide rod, the top fixed mounting of guide rod has the clamping mechanism, the clamping mechanism at least includes four with the drop hammer clamping's snap hook with guide rod center line as center, the upper of guide rod is provided with the release mechanism that releases the snap hook through the non - up and down adjustment mode. This railway roadbed detection device, through the multiple snap hook setting simultaneously release, to be able to make drop hammer can vertically move down, further and load board collide, avoid drop hammer to incline and fall and lead to the problem of the kinetic energy loss of friction with guide rod and the non -uniform impact to load board.

Description

Technical Field

[0001] This utility model relates to the field of roadbed testing technology, specifically a railway roadbed testing device. Background Technology

[0002] A dynamic deformation modulus tester is used for railway subgrade testing. A load of a certain magnitude and duration is applied to a flat plate by a drop hammer impact, causing dynamic stress on the subgrade soil and simulating the impact effect of a high-speed train on the subgrade. The settlement of the plate during the drop hammer impact is recorded. Assuming a constant impact force and a Poisson's ratio μ of 0.21, the dynamic deformation modulus Evd is calculated using the formula for a circular local load on an elastic half-space.

[0003] The existing patent CN2399450Y, a falling weight dynamic deformation modulus tester, discloses the specific working method of the falling weight dynamic deformation modulus tester. In this method, the falling weight is locked to the top of the guide rod, and the locking device is only set on one side of the device. This results in the part of the falling weight that is not locked being below and the part that is locked being above during the release process, causing it to slide downward at an angle. When the device is used for the first time, the tilting and sliding is not obvious. However, after long-term use, it will cause uneven wear of the guide rod, resulting in a large gap between the falling weight and the guide rod. At this time, the tilting and falling of the falling weight will be more obvious, which will lead to uneven stress on the load plate.

[0004] In view of the above situation, this utility model is proposed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a railway subgrade detection device that solves the problem of uneven friction between the drop hammer and the guide rod during tilted and fixed release.

[0006] Technical solution

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a railway subgrade testing device, including a load plate, a guide rod is movably and fixedly engaged above the load plate, a drop hammer is slidably connected to the outer surface of the guide rod, a locking mechanism is fixedly installed at the top of the guide rod, the locking mechanism includes at least four hooks centered on the center line of the guide rod and engaged with the drop hammer, and a release mechanism is provided above the guide rod to release the hooks by means of non-up-down adjustment.

[0008] Furthermore, the release mechanism includes a mounting plate installed above the guide rod, a hook elastically hinged to the outer surface of the mounting plate, a connecting ring fixedly installed at the top of the drop hammer, and an arc-shaped portion at the bottom of the hook to facilitate the lifting of the connecting ring and allow the hook to rotate. The release mechanism includes a rotating part elastically rotatably connected to the mounting plate, a traction rope fixedly wound around the outer surface of the rotating part, and the end of the traction rope away from the rotating part fixedly connected to the hook. Adjacent traction ropes are distributed at equal intervals vertically.

[0009] Furthermore, the release mechanism includes a sleeve mounted above the guide rod. The outer side of the sleeve has a number of through slots equal to the number of hooks. The edge of the hook at one end of the outer side of the sleeve is smooth, and the hook is slidably connected inside the through slot. The inner ring of the drop hammer has an annular groove adapted to the hook. Inside the sleeve, a magnetic suction plate is fixedly installed at the through slot. A support plate is provided at the bottom end of the magnetic suction plate. A return spring is provided between the magnetic suction plate and the inner wall of the sleeve. The hook is sleeved on the inner ring of the return spring and fixedly connected to the magnetic suction plate. Inside the sleeve, below the support plate, a base plate is fixedly installed. A rotating shaft is elastically rotatably connected to the middle of the base plate. The rotating shaft extends above the sleeve, and a magnetic block is provided on the outer surface of the rotating shaft to attract the magnetic suction plate. The magnetic block and the magnetic suction plate are misaligned.

[0010] Furthermore, a transport locking part is provided at one end of the outer surface of the drop hammer. The transport locking part includes a groove formed in the inner ring of the drop hammer. A friction block that contacts the guide rod is slidably connected inside the groove. A threaded shaft is rotatably connected to the side of the friction block away from the guide rod. The threaded shaft passes through the drop hammer and extends to the outer side of the drop hammer.

[0011] Furthermore, a damping and shock-absorbing part for supporting the falling hammer is fixedly installed at the bottom end of the guide rod.

[0012] Furthermore, the upper surface of the load plate is inlaid with two horizontal bubbles, which are perpendicular to each other.

[0013] Furthermore, handles are fixedly installed on both sides of the upper surface of the load plate.

[0014] The beneficial effects of this utility model are as follows: 1. This railway subgrade detection device, by releasing multiple hooks simultaneously, enables the drop hammer to move vertically downwards and collide with the load plate, thus avoiding the problem of the drop hammer falling at an angle and losing kinetic energy due to friction with the guide rod, as well as uneven impact on the load plate.

[0015] 2. This railway subgrade detection device includes a release mechanism comprising a mounting plate installed above a guide rod, hooks elastically hinged to the outer surface of the mounting plate, hooks supported by a bracket, and a torsion spring at the hinge shaft to reset the hooks. A connecting ring is fixedly installed at the top of the drop hammer, and an arc-shaped portion at the bottom of the hooks facilitates the lifting of the connecting ring and allows the hooks to rotate. The release mechanism includes a rotating part elastically rotatably connected to the mounting plate, with a traction rope fixedly wound around its outer surface. The end of the traction rope away from the rotating part is fixedly connected to the hooks, and adjacent traction ropes are evenly distributed vertically. The rotation of the rotating part pulls the traction ropes to rotate, thereby causing all the hooks to swing, thus uniformly releasing the drop hammers and preventing them from tilting and falling. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the load plate of this utility model; Figure 3 This is a schematic diagram of the dropping hammer of this utility model; Figure 4 This is a schematic diagram of the installation disk connection of this utility model; Figure 5 This is a schematic diagram of the base plate connection of this utility model; Figure 6 This utility model Figure 5 Enlarged diagram of point A in the middle.

[0017] The components include: 1. Load plate; 2. Guide rod; 3. Drop hammer; 4. Snap-fit ​​mechanism; 401. Hook; 5. Release mechanism; 402. Mounting plate; 301. Connecting ring; 501. Rotating part; 502. Traction rope; 403. Sleeve; 404. Through groove; 302. Ring groove; 504. Magnetic suction plate; 505. Support plate; 506. Return spring; 507. Base plate; 508. Rotating shaft; 509. Magnetic block; 6. Transport locking part; 601. Groove; 602. Friction block; 603. Threaded shaft; 7. Damping and shock absorption part; 8. Level bubble; 9. Handle. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] See Figure 1-6A railway subgrade inspection device includes a load plate 1, a guide rod 2 movably and fixedly connected to the top of the load plate 1, a drop hammer 3 slidably connected to the outer surface of the guide rod 2, and a locking mechanism 4 fixedly installed at the top of the guide rod 2. The locking mechanism 4 includes at least four hooks 401 centered on the center line of the guide rod 2 and locking with the drop hammer 3. A release mechanism 5 is provided above the guide rod 2 to release the hooks 401 in a non-vertical adjustment manner. Vertical adjustment can easily cause some force to be transmitted to the load plate 1. This arrangement allows multiple hooks 401 to be released simultaneously, so that the drop hammer 3 can move vertically downward and collide with the load plate 1, avoiding the problem of the drop hammer 3 falling at an angle and losing kinetic energy due to friction with the guide rod 2 and uneven impact on the load plate 1.

[0020] The release mechanism 5 includes a mounting plate 402 mounted above the guide rod 2. A hook 401 is elastically hinged to the outer surface of the mounting plate 402. The hook 401 is supported by a bracket, and a torsion spring is provided at the hinge shaft to reset the hook 401. A connecting ring 301 is fixedly mounted on the top of the drop hammer 3. The bottom of the hook 401 is provided with an arc-shaped part that facilitates the lifting of the connecting ring 301 and allows the hook 401 to rotate. The release mechanism 5 includes a rotating part 501 elastically rotatably connected to the mounting plate 402. A traction rope 502 is fixedly wound around the outer surface of the rotating part 501. The end of the traction rope 502 away from the rotating part 501 is fixedly connected to the hook 401. Adjacent traction ropes 502 are distributed equidistantly. By rotating the rotating part 501, the traction rope 502 can be pulled to rotate, thereby driving all the hooks 401 to swing, thus releasing the drop hammer 3.

[0021] In one embodiment, the release mechanism 5 includes a sleeve 403, which is mounted above the guide rod 2. The bottom end of the sleeve 403 has an internal threaded groove. The guide rod 2 is threaded into the inside of the sleeve 403, ensuring it is flush. The outer side of the sleeve 403 has through slots 404, the same number as the number of hooks 401. The edge of one end of the hook 401 on the outer side of the sleeve 403 is smooth, and the hook 401 is slidably connected inside the through slot 404. The inner ring of the drop hammer 3 has an annular groove 302 adapted to the hook 401, and the hook 401 is inserted into the annular groove 302. The release mechanism 5 includes a magnetic suction plate 504 fixedly installed inside the sleeve 403 at the through slot 404. The bottom end of the magnetic suction plate 504 is provided with a support plate 505. A return spring 506 is provided between the magnetic suction plate 504 and the inner wall of the sleeve 403, and the hook 401 is sleeved on the return spring. The inner ring of 506 is fixedly connected to the magnetic suction plate 504. The inside of the sleeve 403 is fixedly installed below the support plate 505. The bottom end of the base plate 507 is threaded and threadedly connected to the inside of the sleeve 403, which plays a supporting role for the device. The middle part of the base plate 507 is elastically rotatably connected to the rotating shaft 508. The middle part of the base plate 507 is provided with a torsion spring. The rotating shaft 508 is fixedly connected to the torsion spring. The rotating shaft 508 extends to the top of the sleeve 403. The outer surface of the rotating shaft 508 is provided with a magnetic block 509 that attracts the magnetic suction plate 504. The magnetic block 509 and the magnetic suction plate 504 are misaligned. When the rotating shaft 508 drives the magnetic block 509 to rotate until it is flush with the magnetic suction plate 504, the magnetic block 509 drives the magnetic suction plate 504 to retract inward, thereby causing the hook 401 to separate from the ring groove 302, which causes the drop hammer 3 to fall vertically.

[0022] Specifically, a transport locking part 6 is provided at one end of the outer surface of the drop hammer 3. The transport locking part 6 includes a groove 601 formed in the inner ring of the drop hammer 3. A friction block 602 that contacts the guide rod 2 is slidably connected inside the groove 601. A threaded shaft 603 is rotatably connected to the side of the friction block 602 away from the guide rod 2. The threaded shaft 603 passes through the drop hammer 3 and extends to the outside of the drop hammer 3. By rotating the threaded shaft 603, the friction block 602 can be driven to change whether it rubs against the guide rod 2. When the friction block 602 rubs against the guide rod 2, the drop hammer 3 cannot shake, which facilitates transport.

[0023] Specifically, the bottom end of the guide rod 2 is fixedly equipped with a damping and shock-absorbing part 7 that supports the drop hammer 3, and the damping and shock-absorbing part 7 plays a role in buffering and shock absorption.

[0024] Specifically, two horizontal bubbles 8 are embedded on the upper surface of the load plate 1. The two horizontal bubbles 8 are perpendicular to each other. By setting the vertical horizontal bubbles 8, it is possible to monitor whether the two intersecting directions are horizontal, thereby ensuring that the load plate 1 is placed horizontally.

[0025] Specifically, handles 9 are fixedly installed on both sides of the upper surface of the load plate 1, which facilitates the handling of the load plate 1.

[0026] In use, the load plate 1 is placed horizontally on the railway subgrade to be tested, so that the guide rod 2 is connected to the load plate 1. The drop hammer 3 is pulled to the highest point and locked by multiple hooks 401. The release mechanism 5 releases multiple hooks 401 at the same time, so that the drop hammer 3 falls and impacts the load plate 1.

[0027] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A railway subgrade testing device, comprising a load plate (1), characterized in that: A guide rod (2) is movably and fixedly connected above the load plate (1). A drop hammer (3) is slidably connected to the outer surface of the guide rod (2). A locking mechanism (4) is fixedly installed at the top of the guide rod (2). The locking mechanism (4) includes at least four hooks (401) that are centered on the center line of the guide rod (2) and locked to the drop hammer (3). A release mechanism (5) is provided above the guide rod (2) to release the hooks (401) by means of non-up-down adjustment.

2. The railway subgrade testing device according to claim 1, characterized in that: The release mechanism (5) includes a mounting plate (402) installed above the guide rod (2), a hook (401) is elastically hinged to the outer surface of the mounting plate (402), a connecting ring (301) is fixedly installed at the top of the drop hammer (3), and the bottom end of the hook (401) is provided with an arc portion that facilitates the connection ring (301) to lift up and allow the hook (401) to rotate. The release mechanism (5) includes a rotating part (501) that is elastically rotatably connected to the mounting plate (402). A traction rope (502) is fixedly wound on the outer surface of the rotating part (501). One end of the traction rope (502) away from the rotating part (501) is fixedly connected to the hook (401). Adjacent traction ropes (502) are distributed at equal intervals up and down.

3. The railway subgrade testing device according to claim 1, characterized in that: The release mechanism (5) includes a sleeve (403), which is installed above the guide rod (2). The sleeve (403) has a number of through slots (404) on its outer side that are the same as the number of hooks (401). The hooks (401) are located on the outer side of the sleeve (403) with smooth edges. The hooks (401) are slidably connected to the inside of the through slots (404). The inner ring of the drop hammer (3) has an annular groove (302) that matches the hooks (401). The release mechanism (5) includes a sleeve (403) with a magnetic plate (504) fixedly installed inside the through groove (404). A support plate (505) is provided at the bottom end of the magnetic plate (504). A reset spring (506) is provided between the magnetic plate (504) and the inner wall of the sleeve (403). A hook (401) is sleeved on the inner ring of the reset spring (506) and fixedly connected to the magnetic plate (504). A base plate (507) is fixedly installed inside the sleeve (403) below the support plate (505). A rotating shaft (508) is elastically rotatably connected to the middle of the base plate (507). The rotating shaft (508) extends to the top of the sleeve (403). A magnetic block (509) for attracting the magnetic plate (504) is provided on the outer surface of the rotating shaft (508). The magnetic block (509) and the magnetic plate (504) are misaligned.

4. A railway subgrade testing device according to any one of claims 1-3, characterized in that: The drop hammer (3) has a transport locking part (6) at one end of its outer surface. The transport locking part (6) includes a groove (601) formed in the inner ring of the drop hammer (3). A friction block (602) that contacts the guide rod (2) is slidably connected inside the groove (601). A threaded shaft (603) is rotatably connected to the side of the friction block (602) away from the guide rod (2). The threaded shaft (603) passes through the drop hammer (3) and extends to the outside of the drop hammer (3).

5. A railway subgrade testing device according to claim 4, characterized in that: The bottom end of the guide rod (2) is fixedly installed with a damping and shock-absorbing part (7) that supports the drop hammer (3).

6. A railway subgrade testing device according to claim 5, characterized in that: The upper surface of the load plate (1) is inlaid with two horizontal bubbles (8), which are perpendicular to each other.

7. A railway subgrade testing device according to claim 5, characterized in that: Handles (9) are fixedly installed on both sides of the upper surface of the load plate (1).

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