Hammer limiting device
By designing a hammer-stopping device and utilizing the combination of springs and sliding blocks, the problem of uncontrollable hammer stroke was solved, enabling accurate judgment and controllability of the hammer position, and ensuring the safety and effectiveness of the hammering process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI UNITED INSURANCE ENG CONSULTING CO LTD
- Filing Date
- 2025-08-22
- Publication Date
- 2026-05-29
Smart Images
Figure CN224299962U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of precast pile auxiliary construction technology, and in particular relates to a hammering limiting device. Background Technology
[0002] In civil engineering foundation construction, the pile end enlargement technology of prestressed hollow pipe piles is widely used to improve the bearing capacity of pile foundations. This process requires a heavy hammer to be suspended into the inner cavity of the pipe pile by a steel wire rope, and an enlarged head is formed at the bottom of the pile end by high-frequency hammering.
[0003] However, existing construction methods mainly rely on observing the markings on the wire rope to determine the height of the hammer. However, the markings are prone to displacement under vibration, which can lead to the hammer hitting the target beyond its travel range or failing to hit the target properly, resulting in a high risk of loss of control over the hammering stroke. Utility Model Content
[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a hammering limiting device to solve the problem of easy loss of control of the hammering stroke in the prior art.
[0005] To achieve the above and other related objectives, this utility model provides a hammer-stopping device, which includes:
[0006] A limiting module includes a mounting block, springs, and a sliding block. The mounting block is detachably mounted on the upper end face of the hollow rigid pile. The upper and lower end faces of the hollow rigid pile have a first through hole. The upper and lower end faces of the mounting block have a second through hole, which communicates with the first through hole. Several springs are arranged in a circular array along the center line of the hollow rigid pile on the mounting block. The lower end faces of the springs are all fixed to the upper end face of the mounting block. The upper end faces of the springs are all set on the sliding block. The upper and lower end faces of the sliding block have a third through hole, which communicates with the second through hole.
[0007] The hammering module includes an inner hammer, a connecting rope, and a hammer lifting block. One end of the connecting rope is fixedly connected to the upper end face of the inner hammer, and the other end of the connecting rope is fixedly connected to the lower end face of the hammer lifting block. The inner hammer hammers the object to be hammered inside the hollow rigid pile within the first through hole.
[0008] Alternatively, the cross-sectional area of the second through hole can be the same as that of the first through hole.
[0009] Alternatively, the cross-sectional area of the third through hole is the same as that of the second through hole.
[0010] As an option, the cross-section of the inner hammer is smaller than the cross-section of the first through hole.
[0011] As an optional solution, the lower end face of the sliding block is provided with a groove, and the upper end faces of several springs are fixedly installed on the upper end face of the groove. The mounting block is located in the groove, and the sliding direction of the sliding block is consistent with the extension and contraction direction of the spring.
[0012] Alternatively, the sidewall of the groove may fit against the outer sidewall of the mounting block.
[0013] As an optional solution, when the lifting hammer block contacts and presses against the sliding block, the outer wall of the lifting hammer block is flush with the outer wall of the sliding block.
[0014] As an optional solution, when the upper end face of the groove is in contact with the upper end face of the mounting block, the lower end face of the sliding block is flush with the lower end face of the mounting block.
[0015] As described above, the hammer-stopping device of this utility model has at least the following beneficial effects:
[0016] 1. In this utility model, before the impact bullet head expands its extension wings to the unfolded state, the connecting rope is not fully taut when the lower end face of the inner hammer contacts the upper end face of the impact bullet head. At this time, the force on the spring is the weight of the lifting block and the connecting rope. The lower end face of the sliding block is higher than the lower end face of the mounting block under the support of the spring. When the inner hammer strikes the impact bullet head to expand its extension wings to the unfolded state, the connecting rope is just fully taut in the first through hole. The spring is compressed under the combined weight of the lifting block, the connecting rope and the inner hammer until the lower end face of the sliding block is flush with the lower end face of the mounting block. Thus, during the process of the inner hammer striking the impact bullet head, it is possible to judge whether the impact bullet head has been struck in place by observing whether the lower end face of the sliding block is flush with the lower end face of the mounting block. The structural design is ingenious.
[0017] 2. After the inner hammer of this utility model strikes the impact bullet, the impact bullet expands the extension wing and remains in the first through hole. The side wall of the impact bullet after the extension wing forms an enlarged bottom is still sealed with the side wall inside the first through hole, so that the grout will not flow into the first through hole from the bottom of the hollow rigid pile. Moreover, the impact bullet can keep the extension wing in the unfolded state to form an enlarged bottom, so as to ensure that the extension wing will not turn back to the unfurled state.
[0018] 3. In this utility model, during the repeated hammering of the impact bullet head by the hammer lifting block driving the inner hammer to extend into the third through hole, the second through hole and the first through hole in sequence, the lower end face of the sliding block is judged to determine whether the extension wing has been hammered to the unfolded state. When the extension wing is hammered to the unfolded state, the connecting rope is just fully straightened in the first through hole, thereby preventing the inner hammer from continuing to hammer the impact bullet head downwards to the side wall of the first through hole, and ensuring that the upper part of the impact bullet head continues to seal the bottom of the first through hole. The structural design is ingenious. Attached Figure Description
[0019] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;
[0020] Figure 2 The view shown is a partial cross-sectional view related to the sliding block of this utility model.
[0021] Figure 3 This is a partial cross-sectional view of the present invention during hammering inside a hollow, stiff pile;
[0022] Figure 4 The diagram shows the structural dimensions of the connecting rope and the inner hammer of this utility model.
[0023] Figure 5 The diagram shows the distance between the upper surface of the impact bullet head and the upper surface of the sliding block of this utility model.
[0024] In the diagram: 101, mounting block; 102, spring; 103, sliding block; 104, second through hole; 105, third through hole; 106, groove;
[0025] 201. Inner hammer; 202. Connecting rope; 203. Hammer lifting block;
[0026] 301. Hollow rigid pile; 302. First through hole;
[0027] 401. Impact bullet head. Detailed Implementation
[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.
[0029] Please see Figures 1 to 5 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.
[0030] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.
[0031] Please see Figures 1 to 3 This utility model provides a hammer-stopping device, which includes:
[0032] The limiting module includes a mounting block 101, a spring 102, and a sliding block 103. The mounting block 101 is detachably mounted on the upper end face of the hollow rigid pile 301. The upper and lower end faces of the hollow rigid pile 301 are penetrated by a first through hole 302. The upper and lower end faces of the mounting block 101 are penetrated by a second through hole 104, which communicates with the first through hole 302. A plurality of springs 102 are arranged in a circular array along the center line of the hollow rigid pile 301 on the mounting block 101. The lower end faces of the plurality of springs 102 are all fixed to the upper end face of the mounting block 101. The upper end faces of the plurality of springs 102 are all disposed on the sliding block 103. The upper and lower end faces of the sliding block 103 are penetrated by a third through hole 105, which communicates with the second through hole 104.
[0033] The method by which the mounting block 101 is detachably mounted on the upper end face of the hollow rigid pile 301 is not limited here; it can be welded or connected by bolts.
[0034] The hammering module includes an inner hammer 201, a connecting rope 202, and a hammer lifting block 203. One end of the connecting rope 202 is fixedly connected to the upper end face of the inner hammer 201, and the other end of the connecting rope 202 is fixedly connected to the lower end face of the hammer lifting block 203. The inner hammer 201 hammers the object to be hammered inside the hollow rigid pile 301 within the first through hole 302.
[0035] In this embodiment, the object to be hammered is an impact bullet 401. The side wall of the impact bullet 401 is sealed to the inner side wall of the hollow rigid pile 301 by a sealing ring. The head of the impact bullet 401 is conical and located at the lower end of the impact bullet 401.
[0036] In this embodiment, when using the hollow rigid pile 301 for construction, the impact bullet 401 is first inserted from the bottom end of the hollow rigid pile 301 upwards to the bottom of the first through hole 302, so that the impact bullet 401 seals the bottom of the first through hole 302. Then, several extension wings can be installed at the bottom end of the hollow rigid pile 301. The extension wings are arranged in a circular array along the center line of the hollow rigid pile 301. Each extension wing is hinged to the lower end face of the hollow rigid pile 301. The rotation axis at the hinge of the extension wing is perpendicular to the center line of the hollow rigid pile 301. The extension wings are temporarily fixed in an undeployed state. This embodiment does not limit the method of temporarily fixing several extension wings to an undeployed state. In this embodiment, steel bars are embedded in each extension wing, and then all the steel bars are tied together with wire to temporarily fix several extension wings to an undeployed state. At this time, several extension wings close the bottom of the first through hole 302. Holes are made in the ground, and grout is injected into the holes. Then, the hollow rigid pile 301, with the extension wings temporarily fixed, is placed in the hole. The inner hammer 201, connected by the connecting rope 202, is driven by the lifting hammer block 203 to sequentially extend into the third through hole 105, the second through hole 104, and the first through hole 302. The impact bullet 401 repeatedly strikes the wing. Before the inner hammer 201 strikes the wing to its deployed state, the impact bullet 401 has not descended to the designated position. The connecting rope 202 is not fully taut when the lower end face of the inner hammer 201 contacts the upper end face of the impact bullet 401. At this time, the lower end face of the sliding block 103 is higher than the lower end face of the mounting block 101. When the inner hammer 201 repeatedly strikes the wing through the impact bullet 401 until the lower end face of the sliding block 103 is observed to be flush with the lower end face of the mounting block 101, the impact bullet 401 has descended to the designated position, and the connecting rope 202 is just fully taut. When stretched, the spring 102 is compressed under the combined weight of the lifting hammer block 203, the connecting rope 202, and the inner hammer 201 until the lower end face of the sliding block 103 is flush with the lower end face of the mounting block 101. This indicates that the inner hammer 201 has hammered the extension wing to the unfolded state. At this time, the impact bullet head 401 is stuck between several extension wings and blocks the lower end face of the first through hole 302. When it is observed that the lower end face of the sliding block 103 is flush with the lower end face of the mounting block 101, the connecting rope 202 and the inner hammer 201 are lifted out of the hollow rigid pile 301 by lifting the lifting hammer block 203, thereby completing the expansion work of the extension wing.
[0037] Before the impact bullet head 401 expands its wings to the unfolded state, the connecting rope 202 is not fully taut when the lower end face of the inner hammer 201 contacts the upper end face of the impact bullet head 401. At this time, the force on the spring 102 is the weight of the lifting block 203 and the connecting rope 202. The lower end face of the sliding block 103 is higher than the lower end face of the mounting block 101 under the support of the spring 102. When the inner hammer 201 strikes the impact bullet head 401 to expand its wings to the unfolded state, the connecting rope... 202 is fully stretched within the first through hole 302. The spring 102 is compressed under the combined gravity of the lifting hammer block 203, the connecting rope 202, and the inner hammer 201 until the lower end face of the sliding block 103 is flush with the lower end face of the mounting block 101. Thus, during the process of the inner hammer 201 striking the impact bullet head 401, it can be determined whether the impact bullet head 401 has been struck in place by observing whether the lower end face of the sliding block 103 is flush with the lower end face of the mounting block 101. The structure is cleverly coordinated.
[0038] Please see Figure 2 and Figure 3 The cross-sectional area of the second through hole 104 is the same as that of the first through hole 302.
[0039] In this embodiment, since the cross-section of the second through hole 104 is the same size as the cross-section of the first through hole 302, and the second through hole 104 and the first through hole 302 are connected, the inner hammer 201 can smoothly pass through the second through hole 104 and enter the first through hole 302 to hammer the impact bullet head 401.
[0040] Please see Figure 2 The cross-sectional area of the third through hole 105 is the same as that of the second through hole 104.
[0041] In this embodiment, since the cross-sectional area of the third through hole 105 is the same as that of the second through hole 104, and the third through hole 105 and the second through hole 104 are connected, the inner hammer 201 can smoothly pass through the third through hole 105 and enter the second through hole 104. Since the cross-sectional area of the second through hole 104 is the same as that of the first through hole 302, and the second through hole 104 and the first through hole 302 are connected, the inner hammer 201 can smoothly pass through the second through hole 104 after passing through the third through hole 105 and enter the first through hole 302 to hammer the impact bullet head 401.
[0042] Please see Figure 3 The cross-section of the inner hammer 201 is smaller than the cross-section of the first through hole 302.
[0043] In this embodiment, when the inner hammer 201 is driven by the lifting hammer block 203 to repeatedly hammer the impact bullet head 401, since the cross-section of the inner hammer 201 is smaller than the cross-section of the first through hole 302, the inner hammer 201 can fall freely to hammer the impact bullet head 401.
[0044] When the inner hammer 201 strikes the impact bullet head 401, the inner hammer 201 can fall freely to strike the impact bullet head 401, so as to ensure that the impact bullet head 401 is successfully struck to the state of extended wings by the inner hammer 201.
[0045] Please see Figure 2 The lower end face of the sliding block 103 is provided with a groove 106, and the upper end faces of several springs 102 are fixedly installed on the upper end face of the groove 106. The mounting block 101 is located in the groove 106, and the sliding direction of the sliding block 103 is consistent with the extension and retraction direction of the springs 102.
[0046] In this embodiment, when using the hollow rigid pile 301 for construction, the impact bullet 401 is first inserted from the bottom end of the hollow rigid pile 301 upwards to the bottom of the first through hole 302, so that the impact bullet 401 seals the bottom of the first through hole 302. Then, several extension wings are hinged to the lower end face of the hollow rigid pile 301, and the extension wings are temporarily fixed in an undeployed state. At this time, the extension wings seal the bottom of the first through hole 302. A hole is opened in the ground, and grout is injected into the hole. Then, the hollow rigid pile 301 with the extension wings temporarily fixed is... Placed inside the hole, the inner hammer 201 is driven by the lifting hammer block 203 to extend into the third through hole 105, the second through hole 104 and the first through hole 302 in sequence, and then repeatedly hammers the impact bullet head 401, so that the extension wings expand the wire and continue to unfold towards the outer wall of the hollow rigid pile 301 to form an expanded bottom. When the extension wings are rotated to the unfolded state, the upper end face of the groove 106 keeps in contact with the upper end face of the mounting block 101. After the hammering is completed, the inner hammer 201 is removed, and the impact bullet head 401 is left between several extension wings to lock the extension wings and prevent them from rotating.
[0047] After the inner hammer 201 of this utility model strikes the impact bullet 401 and expands the extension wing, it remains inside the first through hole 302. The side wall of the impact bullet 401 after the expansion wing forms an enlarged bottom is still sealed with the side wall inside the first through hole 302, so that the grout will not flow into the first through hole 302 from the bottom of the hollow rigid pile 301. Moreover, the impact bullet 401 can keep the extension wing in the expanded state to form an enlarged bottom, and the extension wing will not rotate back to the unexpanded state. The structural design is ingenious.
[0048] Please see Figure 2 The sidewall of the groove 106 is in contact with the outer sidewall of the mounting block 101.
[0049] In this embodiment, as the hammer lifting block 203 drives the inner hammer 201 to extend into the third through hole 105, the second through hole 104 and the first through hole 302 in sequence to repeatedly hammer the impact bullet head 401, when the hammer lifting block 203 contacts and presses the sliding block 103, the sliding block 103 slides along the compression direction of the spring 102 in a posture that is in contact with the side wall of the groove 106 and the outer side wall of the mounting block 101. Before the inner hammer 201 hammers the extension wing to the unfolded state, the lower end surface of the sliding block 103 is higher than the lower end surface of the mounting block 101. When the inner hammer 201 hammers the extension wing to the unfolded state, the lower end surface of the sliding block 103 is flush with the lower end surface of the mounting block 101.
[0050] Please see Figure 3 When the lifting hammer block 203 contacts and presses against the sliding block 103, the outer side wall of the lifting hammer block 203 is flush with the outer side wall of the sliding block 103.
[0051] In this embodiment, when the inner hammer 201 is driven by the lifting hammer block 203 to repeatedly hammer the impact bullet head 401, the lifting hammer block 203 is blocked by the upper end surface of the sliding block 103 when it is lowered to the upper end surface of the sliding block 103, so that the lifting hammer block 203 contacts and presses against the sliding block 103.
[0052] When the lifting hammer block 203 of this utility model is lowered to the upper end face of the sliding block 103, the outer wall of the lifting hammer block 203 is lowered to be flush with the outer wall of the sliding block 103, so that the sliding block 103 can support the lifting hammer block 203 to prevent it from continuing to descend into the first through hole 302, thereby ensuring that the lifting hammer block 203 can be repeatedly raised and lowered so that the inner hammer 201 can be driven by the connecting rope 202 to hammer the impact bullet head 401.
[0053] Please see Figures 2 to 5 When the upper end face of the groove 106 is in contact with the upper end face of the mounting block 101, the lower end face of the sliding block 103 is flush with the lower end face of the mounting block 101.
[0054] When the inner hammer 201 hammers the extension wing to the deployed state, the distance from the upper surface of the impact bullet head 401 to the upper surface of the sliding block 103 is a, the length of the connecting rope 202 is b, and the height of the inner hammer 201 is c, where a = b + c.
[0055] In this embodiment, during the process of the hammer lifting block 203 driving the inner hammer 201 to extend into the third through hole 105, the second through hole 104 and the first through hole 302 in sequence to repeatedly hammer the impact bullet head 401, before the inner hammer 201 hammers the extension wing to the unfolded state, the lower end face of the sliding block 103 is higher than the lower end face of the mounting block 101. When the inner hammer 201 hammers the extension wing to the unfolded state, the upper end face of the groove 106 is in contact with the upper end face of the mounting block 101, and the lower end face of the sliding block 103 is flush with the lower end face of the mounting block 101.
[0056] In this invention, during the repeated hammering of the impact bullet head 401 by the lifting hammer block 203 driving the inner hammer 201 to extend sequentially into the third through hole 105, the second through hole 104, and the first through hole 302, the lower end face of the sliding block 103 is used to determine whether the extension wing has been hammered into the unfolded state. When the extension wing is hammered into the unfolded state, the connecting rope 202 is just fully taut in the first through hole 302, thus ensuring that the inner hammer 201 will not continue to hammer the impact bullet head 401 downwards until it is dislodged from the side wall of the first through hole 302. Instead, it ensures that the upper part of the impact bullet head 401 continues to close the bottom of the first through hole 302, and the impact bullet head 401 remains between several extension wings to lock the extension wings and prevent them from rotating. The structure is cleverly coordinated.
[0057] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. A hammer-impact limiting device, characterized in that, The hammer-stopping device includes: A limiting module includes a mounting block, springs, and a sliding block. The mounting block is detachably mounted on the upper end face of the hollow rigid pile. The upper and lower end faces of the hollow rigid pile have a first through hole. The upper and lower end faces of the mounting block have a second through hole, which communicates with the first through hole. Several springs are arranged in a circular array along the center line of the hollow rigid pile on the mounting block. The lower end faces of the springs are all fixed to the upper end face of the mounting block. The upper end faces of the springs are all set on the sliding block. The upper and lower end faces of the sliding block have a third through hole, which communicates with the second through hole. The hammering module includes an inner hammer, a connecting rope, and a hammer lifting block. One end of the connecting rope is fixedly connected to the upper end face of the inner hammer, and the other end of the connecting rope is fixedly connected to the lower end face of the hammer lifting block. The inner hammer hammers the object to be hammered inside the hollow rigid pile within the first through hole.
2. The hammer-impact limiting device according to claim 1, characterized in that: The cross-sectional area of the second through hole is the same as that of the first through hole.
3. The hammer-impact limiting device according to claim 2, characterized in that: The cross-sectional area of the third through hole is the same as that of the second through hole.
4. The hammer-impact limiting device according to claim 3, characterized in that: The cross-section of the inner hammer is smaller than the cross-section of the first through hole.
5. The hammer-impact limiting device according to claim 1, characterized in that: The lower end face of the sliding block is provided with a groove, and the upper end faces of several springs are fixedly installed on the upper end face of the groove. The mounting block is located in the groove, and the sliding direction of the sliding block is consistent with the extension and contraction direction of the spring.
6. The hammer-impact limiting device according to claim 5, characterized in that: The sidewall of the groove fits against the outer sidewall of the mounting block.
7. The hammer-impact limiting device according to claim 1, characterized in that: When the lifting hammer block contacts and presses against the sliding block, the outer wall of the lifting hammer block is flush with the outer wall of the sliding block.
8. A hammer-impact limiting device according to claim 5, characterized in that: When the upper end face of the groove is in contact with the upper end face of the mounting block, the lower end face of the sliding block is flush with the lower end face of the mounting block.