Limiting protection device for hydraulic pile hammer

Abstract

The utility model discloses a hydraulic pile hammer limiting protection device, and relates to the technical field of hydraulic pile hammers. A protection mechanism comprises a piston block, the piston block is connected in a groove in a sliding mode, the bottom of the piston block is fixedly connected with a connecting rod, the bottom end of the connecting rod is fixedly connected with a pushing block, and a buffering mechanism is arranged on the pushing block. By means of the protection mechanism, when the hammer core moves upwards beyond the limit range, under the sealing effect of the piston block on the groove, compression of air in the groove is facilitated, air leakage is prevented, and therefore buffering of the hammer core is facilitated, and the protection effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pile hammers, in particular to a hydraulic pile hammer limit protection device. Background Art

[0002] After searching, the Chinese patent publication number is CN109797745B, and the publication date is 2020-09-04. It discloses a hydraulic pile hammer limit protection device, in which a safety chamber for the hammer core to extend into is opened at the top of the cylinder body. The gas pressure in the safety chamber is squeezed upward by the top of the hammer core to stop the upward movement of the hammer core, so as to limit the upward displacement of the hammer core and avoid damage to the pile hammer due to upward impact; a limit ring is provided on the hammer core, and a protective cone is provided on the inner wall of the cylinder body. The protective cone is located at the cylinder body. Between the bottom end of the inner cavity of the body and the oil inlet and outlet of the side wall of the cylinder body, the large diameter end of the protective cone faces upward, so that the distance between the outer wall of the limit ring and the protective cone surface decreases as the limit ring moves downward, thereby reducing the volume of the inner cavity of the cylinder body below the limit ring and the volume of the annular channel formed by the outer wall of the limit ring and the protective cone surface at the same time, and the hydraulic oil in the inner cavity of the cylinder body below the limit ring is squeezed downward by the limit ring to stop the downward movement of the hammer core, so as to limit the downward displacement of the hammer core and avoid the pile hammer from being damaged by the downward impact. However, when the device is in use, when the hammer core moves upward beyond the limit range, due to the poor sealing effect between the sealing ring and the protective pin shaft, the gas in the safety cavity will leak, thereby affecting the effect of protecting the hammer core. Utility Model Content

[0003] The purpose of the utility model is to provide a hydraulic pile hammer limit protection device to solve the problems mentioned in the above background technology.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] The hydraulic pile hammer limit protection device comprises a shell and a cylinder arranged in the shell, wherein a hammer core is arranged in the cylinder, a protection pin is arranged on the hammer core, a protection cap is fixedly connected to the top of the cylinder, a groove is arranged at the bottom of the protection cap, and a protection mechanism is arranged in the groove.

[0006] The protection mechanism comprises a piston block, which is slidably connected in the groove. A connecting rod is fixedly connected to the bottom of the piston block, and a push block is fixedly connected to the bottom end of the connecting rod. A buffer mechanism is arranged on the push block.

[0007] As a further solution of the utility model: the buffer mechanism includes a movable groove, the movable groove is opened on the bottom of the push block, a first spring is fixedly connected in the movable groove, and a connecting plate is fixedly connected to the bottom end of the first spring.

[0008] As a further solution of the utility model: an anti-slip ring is fixedly connected to the bottom of the protective cap, and the anti-slip ring is slidably connected to the connecting rod.

[0009] As a further solution of the utility model: a second spring is sleeved on the outer surface of the connecting rod, and two ends of the second spring are respectively fixedly connected to the anti-slip ring and the push block.

[0010] As a further solution of the utility model: the connecting plate is slidably connected to the movable groove.

[0011] As a further solution of the utility model: the push block is slidably connected to the cylinder barrel.

[0012] Beneficial Effects

[0013] The utility model provides a hydraulic pile hammer limit protection device. Compared with the prior art, it has the following advantages:

[0014] Beneficial effects:

[0015] (1) The present application utilizes a protective mechanism. When the hammer core moves upward beyond the limit range, the sealing effect of the piston block on the groove is conducive to compressing the air inside the groove and preventing air leakage, thereby facilitating buffering of the hammer core and achieving a protective effect.

[0016] (2) The present application improves the buffering effect on the hammer core by providing a buffer mechanism, thereby further improving the protection of the hammer core. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 It is a three-dimensional cross-sectional view of the utility model;

[0019] Figure 3 It is a three-dimensional cross-sectional view of the push block of the utility model.

[0020] In the figure: 1. housing; 2. cylinder; 3. hammer core; 4. protection pin; 5. protection cap; 6. groove; 7. protection mechanism; 71. piston block; 72. connecting rod; 73. push block; 74. buffer mechanism; 741. movable groove; 742. first spring; 743. connecting plate; 8. anti-slip ring; 9. second spring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1

[0023] See also Figure 1-3 As shown, the utility model is a limit protection device for a hydraulic pile hammer, comprising a housing 1 and a cylinder 2 arranged in the housing 1, wherein a hammer core 3 is arranged in the cylinder 2, a protection pin 4 is arranged on the hammer core 3, a protection cap 5 is fixedly connected to the top of the cylinder 2, a groove 6 is provided at the bottom of the protection cap 5, a protection mechanism 7 is arranged in the groove 6; the protection mechanism 7 comprises a piston block 71, the piston block 71 is slidably connected in the groove 6, a connecting rod 72 is fixedly connected to the bottom of the piston block 71, a push block 73 is fixedly connected to the bottom end of the connecting rod 72, a buffer mechanism 74 is arranged on the push block 73, by utilizing the protection mechanism 7, when the hammer core moves upward beyond the limit range, under the sealing effect of the piston block 71 on the groove 6, it is beneficial to compress the air inside the groove 6 to prevent air leakage, thereby facilitating buffering of the hammer core 3 and achieving a protective effect.

[0024] The buffer mechanism 74 includes a movable groove 741, which is opened on the bottom of the push block 73. A first spring 742 is fixedly connected in the movable groove 741, and a connecting plate 743 is fixedly connected to the bottom end of the first spring 742. By setting the buffer mechanism 74, the buffering effect on the hammer core 3 is improved, and the protection of the hammer core 3 is further improved.

[0025] The bottom of the protective cap 5 is fixedly connected with an anti-drop ring 8 . The anti-drop ring 8 can prevent the piston block 71 from falling off from the groove 6 . The anti-drop ring 8 is slidably connected to the connecting rod 72 .

[0026] The connecting plate 743 is slidably connected to the movable groove 741 .

[0027] The push block 73 is slidably connected to the cylinder barrel 2 .

[0028] Embodiment 2

[0029] Based on Example 1, see Figure 2 Shown

[0030] A second spring 9 is sleeved on the outer surface of the connecting rod 72, and both ends of the second spring 9 are fixedly connected to the anti-slip ring 8 and the push block 73 respectively. By providing the second spring 9, collision between the push block 73 and the anti-slip ring 8 can be avoided.

[0031] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0032] The working principle of the utility model is as follows: when the hammer core moves upward beyond the limit range, the protection pin 4 is pressed on the connecting plate 743 and compresses the first spring 742. When the first spring 742 is compressed to the limit, the push block 73 rises, thereby driving 71 to move through the connecting rod 72, and then the piston block 71 compresses the air inside the groove 6. The air pressure of the gas in the groove 6 exerts a downward force on the hammer core 3, which can stop the upward movement of the hammer core 3. In this process, the second spring 9 is forced in a compressed state, which can avoid collision between the push block 73 and the anti-slip ring 8. In summary, by utilizing the protection mechanism 7, under the sealing effect of the piston block 71 on the groove 6, it is beneficial to compress the air inside the groove 6 and prevent air leakage, which is beneficial to buffer the hammer core 3 and achieve a protective effect. By providing the buffer mechanism 74, the buffering effect on the hammer core 3 is improved, and the protective effect on the hammer core 3 is further improved.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used 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. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic pile hammer limit protection device, comprising a housing (1) and a cylinder (2) arranged in the housing (1), a hammer core (3) being arranged in the cylinder (2), and a protection pin (4) being arranged on the hammer core (3), characterized in that: A protective cap (5) is fixedly connected to the top of the cylinder (2), a groove (6) is provided at the bottom of the protective cap (5), and a protective mechanism (7) is provided in the groove (6); The protection mechanism (7) comprises a piston block (71), the piston block (71) is slidably connected in the groove (6), the bottom of the piston block (71) is fixedly connected to a connecting rod (72), the bottom end of the connecting rod (72) is fixedly connected to a push block (73), and the push block (73) is provided with a buffer mechanism (74).

2. The hydraulic pile hammer limit protection device according to claim 1 is characterized in that: The buffer mechanism (74) comprises a movable groove (741) which is provided on the bottom of the push block (73). A first spring (742) is fixedly connected in the movable groove (741), and a connecting plate (743) is fixedly connected to the bottom end of the first spring (742).

3. The hydraulic pile hammer limit protection device according to claim 1 is characterized in that: The bottom of the protective cap (5) is fixedly connected with an anti-slip ring (8), and the anti-slip ring (8) is slidably connected to the connecting rod (72).

4. The hydraulic pile hammer limit protection device according to claim 1, characterized in that: A second spring (9) is sleeved on the outer surface of the connecting rod (72), and two ends of the second spring (9) are respectively fixedly connected to the anti-slip ring (8) and the push block (73).

5. The hydraulic pile hammer limit protection device according to claim 2, characterized in that: The connecting plate (743) is slidably connected to the movable groove (741).

6. The hydraulic pile hammer limit protection device according to claim 1, characterized in that: The push block (73) is slidably connected to the cylinder barrel (2).

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