Novel air hammer device

Abstract

According to the technical scheme, the novel air hammer device comprises an air hammer body and is characterized in that the air hammer body comprises an upper cover and a shell, the shell is provided with a through center cavity, the upper cover is provided with an air inlet hole communicated with the center cavity, the center cavity is provided with a matched mandrel, and the air inlet hole is communicated with the air inlet hole. The shell is provided with an air outlet hole communicated with the central cavity, and the air outlet hole is close to the bottom surface of the shell; the shell is provided with an air chamber cavity, the air chamber cavity is communicated with the central cavity, an elastic cushion used for compensating air pressure change in the air chamber is arranged in the air chamber cavity, the elastic cushion is matched with the air chamber cavity, and the elastic cushion comprises a fixed layer and a movable layer. Through the arrangement of the elastic cushion, elastic potential energy is accumulated to compensate consumed energy when the mandrel moves, the air pressure attenuation speed during working is slowed down, and the airflow turbulence phenomenon is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic hammer device technology, and more specifically to a novel pneumatic hammer device. Background Technology

[0002] Currently, pneumatic impact hammers are a widely used advanced powder discharge device both domestically and internationally. Their working principle involves using compressed air as power to instantly release and push the internal hammerhead to strike the bottom, transmitting a powerful impact to the hopper wall. This effectively breaks up material bridging, loosening accumulated material and ensuring smooth ash discharge. They are used to automatically prevent powder from adhering, clogging, and bridging in pipelines, hoppers, and silos, and are widely applied in powder processing industries such as chemical, food, cement, pharmaceutical, and plastics.

[0003] However, the aforementioned existing technologies still have some drawbacks. Problems such as low compressed air transmission efficiency and turbulent airflow lead to significant energy loss, resulting in increased power consumption and insufficient impact force. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the present invention provides a novel pneumatic hammer device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a pneumatic hammer body, which comprises a top cover and a shell. The shell has a through-hole, the top cover has an air inlet connecting to the core cavity, the core cavity has a corresponding spindle, and the shell has an air outlet connecting to the core cavity, the air outlet being close to the bottom surface of the shell. The shell also has an air chamber connected to the core cavity, and an elastic pad for compensating for changes in air pressure within the air chamber is provided inside the air chamber. The elastic pad is adapted to the air chamber and includes a fixed layer and a movable layer.

[0006] The present invention is further configured such that: the active layer includes an annular main board and several annular auxiliary boards, the annular main board and the annular auxiliary boards are connected by a flexible material, and adjacent annular auxiliary boards are connected by a flexible material.

[0007] The present invention is further configured such that: the fixing layer is provided with a mounting groove, the mounting groove is close to the annular main board, and the mounting groove is provided with a spring A.

[0008] The present invention is further configured such that: the mating surface of the upper cover is provided with a positioning protrusion A, the outer shell is provided with a groove A corresponding to the upper cover; and the upper cover is provided with symmetrical positioning protrusions B.

[0009] The present invention is further configured such that: a transfer sleeve is provided in the central cavity, the transfer sleeve is close to the upper cover, and a fixing ring is provided in the transfer sleeve for fixing.

[0010] The present invention is further configured such that: a wear-resistant sleeve is provided between the mandrel and the outer shell, and a return spring B is provided on the mandrel.

[0011] In summary, this utility model has the following beneficial effects: by setting up an elastic pad, this utility model accumulates elastic potential energy to compensate for the energy consumed when the spindle moves, slows down the air pressure decay rate during operation, reduces airflow turbulence, and further stabilizes the airflow by setting up a transmission sleeve, making the air pressure work of this utility model stable and reliable. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0013] Figure 2 This is a cross-sectional view of this embodiment;

[0014] Figure 3 This is a schematic diagram of the upper cover structure in this embodiment;

[0015] Reference numerals in the attached drawings: 1. Air hammer body; 2. Top cover; 21. Air inlet; 22. Protrusion A; 23. Protrusion B; 3. Outer shell; 31. Central cavity; 311. Mandrel; 32. Air chamber cavity; 33. Groove A; 4. Elastic pad; 41. Fixed layer; 411. Spring A; 42. Movable layer; 421. Annular main plate; 422. Annular auxiliary plate; 423. Flexible material; 5. Transmission sleeve; 6. Return spring B; 7. Wear-resistant sleeve. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings.

[0017] This embodiment discloses a novel pneumatic hammer device, such as Figures 1 to 3 As shown, the device includes a pneumatic hammer body 1, which comprises a top cover 2 and a shell 3. The shell 3 has a through-hole 31. The top cover 2 has an air inlet 21 connecting to the central cavity 31. The central cavity 31 has a corresponding spindle 311. The shell 3 has an air outlet connecting to the central cavity 31, located near the bottom surface of the shell 3. The shell 3 also has an air chamber 32 connected to the central cavity 31. An elastic pad 4 for compensating for pressure changes within the air chamber 32 is disposed within the air chamber 32. The elastic pad 4 is adapted to the air chamber 32 and includes a fixed layer 41 and a movable layer 42. The elastic pad 4 can convert some of the pressure into stored elastic potential energy. When the pressure within the chamber fluctuates or decreases, the elastic pad 4 adaptively releases its potential energy to compensate for the pressure within the air chamber 32 and maintain stable pressure.

[0018] Further improvements include the following: the active layer 42 comprises an annular main plate 421 and several annular auxiliary plates 422. The annular main plate 421 and the annular auxiliary plates 422 support the elastic pad 4. The annular main plate 421 and the annular auxiliary plates 422 are connected by a flexible material 423, and adjacent annular auxiliary plates 422 are also connected by a flexible material 423. The annular auxiliary plates 422 are evenly distributed on the inner and outer sides of the annular main plate 421, making the cross-section of the active layer 42 arched under normal conditions. The flexible material 423 allows relative rotation between the annular main plate 421 and the annular auxiliary plates 422, and between adjacent annular auxiliary plates 422. The interaction between the main plate and the auxiliary plates increases the mobility of the active layer 42, allowing the active layer 42 to obtain more deformation under pressure, thereby accumulating more potential energy for compensation.

[0019] Further improvements include a mounting groove on the fixing layer 41, located near the annular main plate 421, and a spring A411 positioned within the mounting groove. The spring A411, positioned within the mounting groove, provides stable contact and support to the annular main plate 421, ensuring that the accumulation and release of its elastic potential energy are effectively applied to the annular main plate 421. When the pressure in the air chamber 32 increases, the spring A411 contracts under pressure, accumulating potential energy; when the pressure in the air chamber 32 decreases, it effectively lifts the annular main plate 421, releasing the accumulated potential energy.

[0020] To further improve the design, the upper cover 2 has a positioning protrusion A22 on its mating surface, and the outer shell 3 has a groove A33 that corresponds to the upper cover 2. The positioning protrusion A22 and the groove A33 cooperate to achieve precise positioning, reducing the risk of misalignment during assembly. The upper cover 2 has symmetrical positioning protrusions B23, which will lock the outer shell 3 during installation to prevent the upper cover 2 from deflecting from the outer shell 3, reducing vibration or external force interference, and improving the stability of the present invention.

[0021] Further improvements include a transfer sleeve 5 provided in the central cavity 31, located near the upper cover 2, and equipped with a fixing ring for secure fixation. The transfer sleeve 5 controls the compressed air flow rate, optimizes airflow distribution, avoids excessively high or low local pressure, and improves the working stability of the air hammer. The transfer sleeve 5 can also absorb some of the vibration and impact forces during operation, protecting the internal structure of the air hammer and reducing fatigue damage.

[0022] Further improvements include a wear-resistant sleeve 7 between the mandrel 311 and the outer shell 3, covering easily worn parts of the air hammer, such as the hammer head; this significantly reduces mechanical wear through high hardness and a low coefficient of friction. The mandrel 311 is equipped with a return spring B6. The return spring B6 assists the mandrel 311, shortening its reset time.

[0023] Working principle of this utility model

[0024] In operation, the air inlet is connected to an air pump interface. High-speed airflow enters the central cavity 31 through the air pump interface. The air pressure in the central cavity 31 increases continuously with the increase of incoming gas. When the air pressure increases to a certain limit, it will push the elastic pad 4 to move, causing the spring A411 to deform under pressure and accumulate elastic potential energy. When the air pressure in the cavity increases to a pressure greater than that of the return spring B6, the air pressure will push the spindle 311 to move. When the spindle 311 is pushed, the air pressure in the cavity will drop rapidly with the movement of the spindle 311. When the air pressure drops, the spring A411 will release the accumulated potential energy, arching the elastic pad 4 and reducing the volume of the air chamber 32. This compensates for the reduced air pressure in the air chamber 32, reduces the air pressure fluctuation in the air chamber 32, stabilizes the working air pressure of this invention, and reduces energy loss.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A new type of air hammer device comprising an air hammer body (1), characterized in that: The air hammer body (1) includes an upper cover (2) and a shell (3), the shell (3) is provided with a through central cavity (31), the upper cover (2) is provided with an air inlet hole (21) communicating with the central cavity (31), the central cavity (31) is provided with a corresponding core shaft (311), the shell (3) is provided with an air outlet hole communicating with the central cavity (31), and the air outlet hole is close to the bottom surface of the shell (3); the shell (3) is provided with a gas chamber cavity (32), the gas chamber cavity (32) is communicated with the central cavity (31), the gas chamber cavity (32) is provided with an elastic pad (4) for compensating the pressure change in the gas chamber, the elastic pad (4) is adapted to the gas chamber cavity (32), and the elastic pad (4) includes a fixed layer (41) and a movable layer (42).

2. A new type of air hammer device according to claim 1, characterized in that: The movable layer (42) includes an annular main plate (421) and a plurality of annular auxiliary plates (422), the annular main plate (421) and the annular auxiliary plates (422) are connected by flexible materials (423), and adjacent annular auxiliary plates (422) are connected by flexible materials (423).

3. A new type of air hammer device according to claim 2, characterized in that: The fixed layer (41) is provided with a mounting groove, the mounting groove is close to the annular main plate (421), and the mounting groove is provided with a spring A (411).

4. A new type of air hammer device according to claim 1, characterized in that: The fitting surface of the upper cover (2) is provided with a positioning protrusion A (22), the shell (3) is provided with a groove A (33) corresponding to the upper cover (2); the upper cover (2) is provided with symmetrical positioning protrusions B (23).

5. A new type of air hammer device according to claim 1, characterized in that: The central cavity (31) is provided with a transmission sleeve (5), the transmission sleeve (5) is close to the upper cover (2), and the transmission sleeve (5) is provided with a fixing ring for fixing.

6. A new type of air hammer device according to claim 1, characterized by: The core shaft (311) and the shell (3) are provided with a wear-resistant sleeve (7), and the core shaft (311) is provided with a return spring B (6).

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