CN210118211U - Tamping apparatus - Google Patents

Abstract

The utility model relates to a tamping equipment, it includes as the internal combustion engine of the power supply of tamping equipment. The compaction apparatus further includes a cyclone separating device that purifies intake air of the internal combustion engine, the cyclone separating device including a cylindrical outer peripheral wall, an inlet, a guide fan provided in the inlet, a transverse wall provided transversely to the outer peripheral wall, an air outlet provided at a central position of the transverse wall, and a particulate matter outlet that opens on the outer peripheral wall adjacent to the transverse wall. Provide the utility model discloses need the problem of frequent renew cartridge with solution ramming equipment.

Description

Tamping apparatus

Technical Field

The present disclosure relates to a compaction apparatus, and more particularly, to a compaction apparatus having a cyclonic separation device for pre-separating particulate matter such as dust before air enters an air filtering device of an engine.

Background

This section provides background information related to the present disclosure, which is not necessarily prior art.

Tamping equipment usually works in gravel and sand ground, and in the tamping work of high frequency, dust flies because of the continuous hammering of tamping plate, and particulate matter such as dust can be than general operational environment height a lot. The engine of the common tamping equipment is provided with a random filter element as a main air filtering device. Therefore, the filter element is generally required to be maintained and removed after every 20 hours, and the filter element is required to be replaced after every 200 hours. Otherwise, the engine or intake air is not smooth and affects power, or excessive dust is sucked and reduces service life.

The professional tamping equipment can additionally add a front air filtering device according to the characteristic. Although the maintenance and replacement frequency of the filter element of the engine is prolonged, the preposed air filter element also needs to be replaced frequently, otherwise the same problems as the single filter element occur.

Currently, air filtering systems of tamping equipment in the market commonly use sponge or paper filter elements. The filter element can be a wet filter element or a dry filter element. However, in any case, untreated ambient air is directly sucked in. Greatly increasing the cleaning frequency of the filter element and reducing the service life of the filter element.

SUMMERY OF THE UTILITY MODEL

A general summary of the disclosure is provided in this section and is not a comprehensive disclosure of the full scope of the disclosure or all of the features of the disclosure.

It is an object of the present disclosure to provide a compaction apparatus having a simple and durable air-particulate matter pre-separation device capable of greatly reducing particulate matter entering a pre-air filtering device and a main air filtering device of an engine, thereby effectively reducing the maintenance frequency of the compaction apparatus and improving the working efficiency of the compaction apparatus.

Another object of the present disclosure is to provide a cyclone separating apparatus having higher separation efficiency for particulate matter such as dust and the like and a compaction apparatus including the cyclone separating apparatus.

It is still another object of the present disclosure to provide a cyclone separating apparatus and a tamping apparatus including the same, which can suppress deterioration of separation performance caused by vibration of the tamping apparatus.

According to one aspect of the present disclosure, a compaction apparatus is provided that includes an internal combustion engine as a power source for the compaction apparatus. The compaction apparatus further includes a cyclone separating device that purifies intake air of the internal combustion engine, the cyclone separating device including a cylindrical outer peripheral wall, an inlet, a guide fan provided in the inlet, a transverse wall provided transversely to the outer peripheral wall, an air outlet provided at a central position of the transverse wall, and a particulate matter outlet that opens on the outer peripheral wall adjacent to the transverse wall.

This is disclosed through adopting cyclone to carry out centrifugal separation to the particulate matter in the ambient air to avoided directly inhaling untreated operational environment air by air filter and caused the problem that filter core blockked up, equipment need frequently maintain, thereby realized durable and efficient tamping equipment.

Optionally, the cyclonic separating apparatus further comprises a dividing wall located radially inwardly of the outer peripheral wall, the dividing wall extending from the transverse wall towards the inlet side around the air outlet. Preferably, the partition wall extends from the transverse wall parallel to the peripheral wall around the air outlet towards the inlet side for a distance which may be, for example, one fifth to one third of the length of the airflow passage of the cyclonic separating apparatus.

Optionally, the cyclonic separating apparatus further comprises a screening wall radially located between the particulate outlet and the air outlet, the screening wall having a plurality of apertures formed therein and a space between the screening wall and the peripheral wall for receiving particulate passing through the screening wall. Preferably, the screening wall extends parallel to the peripheral wall from the inlet to the particulate outlet and, in the case of cyclonic separating apparatus, is located between the peripheral wall and the dividing wall.

Optionally, the sifting wall is detachably fixed to the frame of the induced draft fan; alternatively, two or more legs are formed on the transverse wall at a distance from the particulate outlet, the sieving wall being detachably fixed to the legs.

Optionally, a guide is further provided at an end of the screening wall proximate to the inlet, the guide being arranged to be positioned downstream of the outlet mouth of the inducer fan in a flow direction to direct particulate matter directly to a space between the screening wall and the peripheral wall.

Optionally, the peripheral wall, the deflector fan and the transverse wall define an airflow passage of the cyclonic separating apparatus, the length of the airflow passage being from 2.5 to 3 times the diameter of the inlet.

Optionally, the cyclonic separating apparatus is arranged in an upwardly inclined manner from the inlet side to the outlet side.

Optionally, the cyclonic separating apparatus is inclined upwardly by 10 to 45 degrees from the inlet side to the outlet side.

Optionally, the cyclone separation device further comprises a pre-air filtration device arranged downstream of the cyclone separation device and a main filtration device of the internal combustion engine.

The tamping equipment with the cyclone separation device has the advantages of simple structure, convenience in installation and maintenance and high separation efficiency, and can effectively inhibit the problem of return airflow of separated particulate matters caused by strong vibration of the tamping equipment.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. It should be understood that the figures are not drawn to scale and that corresponding reference numerals indicate like or corresponding parts and features throughout the figures. In the drawings:

FIG. 1 is a front perspective view of an example of a compaction apparatus according to the present disclosure;

FIG. 2 is a side view of the compaction apparatus shown in FIG. 1;

FIG. 3 is an exploded perspective view of the portion of the compaction apparatus of FIG. 1 incorporating a pre-air filtration device and an air-particulate pre-separation device;

FIG. 4 is a top view of the portion of FIG. 3 shown with the cover open, with the air flow paths indicated by solid arrows;

FIG. 5 is a cross-sectional view of the portion shown in FIG. 4 taken along line C-C;

FIG. 6 is a cross-sectional view of cyclonic separating apparatus according to another embodiment of the present disclosure;

FIG. 7 is a cross-sectional view of cyclonic separating apparatus according to yet another embodiment of the present disclosure; and

fig. 8 is a sectional view of a cyclone separating apparatus according to still another embodiment of the present disclosure.

Detailed Description

The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses.

Example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope to those skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known methods, well-known device structures, and well-known technologies are not described in detail.

When an element or layer is referred to as being "on," "engaged to," "connected to" or "coupled to" another element or layer, it can be directly on, engaged, connected or coupled to the other element or layer or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," or "directly engaged with," "directly connected to," or "directly coupled to" another element or layer, there are no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in the same manner (e.g., "between …" versus "directly between …", "adjacent" versus "directly adjacent", etc.). As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In order to avoid the situation that air containing more impurities directly enters the air filtering system to cause blockage and damage of the filter element, an additional air-particle pre-separation device is arranged in front of the filtering device, so that the cleaning and replacing frequency of the filter element of the filtering device is reduced as much as possible, and the service life of the filter element is further prolonged. According to embodiments of the present disclosure, the air-particulate matter pre-separation device may be implemented, for example, by a cyclonic separation device that employs centrifugal separation rather than filtration separation. The cyclone separation device has the advantages of simple structure, durability, low cost, high separation efficiency for working media with large mass difference and the like, and is suitable for being used as an air-particle pre-separation device of the impact rammer 1. It is to be understood, however, that the air-particulate preseparation apparatus of the present disclosure is not limited to cyclonic separation apparatus, but rather, any suitable air-particulate separation apparatus that is less prone to clogging may be employed.

The tamping apparatus according to the present disclosure is described below by way of example with reference to the impact tamper 1 shown in fig. 1 and 2. Fig. 1 is a front view of a battering ram 1, and fig. 2 is a side view of the battering ram 1.

As shown in the figure, the impact rammer 1 is an internal combustion vibration impact rammer, also called a plate rammer, is suitable for ramming and leveling of various sandy soil, gravel, three-in-one soil, concrete, clay and hot asphalt, and is particularly suitable for construction of environments such as buildings, ground surfaces, courtyards, road beds, bridge piles, trenches, fields, narrow fields and the like. The impact ram 1 generally includes an armrest 10, a cyclonic separating apparatus 20, a forward air filtering device 30, a motor 40 (shown in phantom in fig. 2), a transmission (not shown), a ram 50, and a housing 60. The housing 60 may include an upper housing portion 61 for housing the cyclonic separating apparatus 20 and the pre-air filtering apparatus 30, and an intermediate housing portion 62 and a lower housing portion 63 for housing the transmission. The engine 40 is attached to the outer rear side of the intermediate housing portion 62, i.e., the outside near the operator, as a power source of the battering ram 1, and the engine 40 may be a gasoline engine, a diesel engine, or any other suitable internal combustion engine. The transmission generally includes a gear reduction mechanism and an eccentric wheel linkage mechanism. The output shaft of the engine 40 is coupled to a gear reduction mechanism of the transmission to reduce the output rotational speed of the engine 40 to an appropriate rotational speed. And then, the rotating motion output by the gear speed reducing mechanism is converted into the vertical reciprocating linear motion, namely vibration, of the connecting rod through the eccentric wheel connecting rod mechanism. The lower portion of the connecting rod is connected to the tamper plate 50 via a spring (not shown in the drawings), thereby causing the tamper plate 50 to vibrate at a high frequency in the vertical direction, thereby achieving a tamper leveling operation.

It should be noted that the mechanism of the present disclosure for converting rotary motion to reciprocating linear motion is not limited to the eccentric-link mechanism described above, but may be any suitable mechanism capable of achieving such conversion, including but not limited to a crank mechanism, a cam mechanism, an eccentric, a link mechanism, or a combination thereof.

The armrest 10 and the upper housing portion 61 are connected and fixed to the upper side of the middle housing portion 62, and do not directly communicate with the middle housing portion 62. The lower case portion 63 is connected and fixed to the lower side of the intermediate case portion 62 in a sealed manner and communicates with the intermediate case portion 62. The tamper plate 50 is connected and secured to the underside of the lower housing portion 63 in a sealed manner. The rotary motion components of the transmission are generally housed in the interior space of the intermediate housing portion 62 and the reciprocating linear motion components of the transmission are generally housed in the lower housing portion 63. As described above, the lower part of the connecting rod of the transmission that performs the linear reciprocating motion is connected to the tamper plate 50 via a spring, and in accordance therewith, an elastic stretchable and contractible portion 64 similar to a bellows is also included in the lower housing portion 63 that houses the connecting rod. The resilient, telescoping portion 64 and the spring, in addition to being able to deform telescopically in response to the stroke of the tamper plate 50 during vibration of the tamper plate 50, also serve to cushion and store energy. The load-bearing portions including the armrest 10, the intermediate housing portion 62, and the lower housing portion 63 are made of metal, and the upper housing portion 61 may be molded of a light material such as resin or plastic.

As described above, the battering ram 1 is not symmetrically arranged as a whole, and especially attachment of the engine assembly will cause the center of gravity of the battering ram 1 to shift to the rear side. For this reason, as shown in fig. 1 and 2, the impact ram 1 is made such that the center line is inclined to the front side at a certain angle to balance the above-described center of gravity offset and facilitate the operator to push the impact ram 1 forward during operation.

The rotational power of the engine 40 comes from the combustion of fuel and air, and therefore requires constant intake of air from the environment during operation. The working environment of the battering ram results in the intake air often containing a large amount of particulate matter such as dust, debris, etc. As shown in fig. 3 and 4, in order to better protect the engine 40, the impact ram 1 is additionally equipped with a pre-air filter device 30 and a cyclone device 20 in addition to a main air filter device (not shown) of the engine 40. The pre-air filtering device 30 and the cyclonic separating apparatus 20 are housed in the upper housing portion 61. More specifically, the upper housing portion 61 includes an upper cover 65 and an inner housing 66, the front air filter device 30 is accommodated in the inner housing 66, the cyclonic separating apparatus 20 is attached to the outside of the inner housing 66, and the upper cover closes the inner space of the inner housing 66 from above and covers the cyclonic separating apparatus 20. As indicated by the solid arrows in figure 4, ambient air first enters the cyclonic separating apparatus 20 to remove the larger particles, typically soil particles or debris such as sand, vegetation and the like, and the majority of the dirt. The air subjected to the preliminary separation treatment flows into the inner casing accommodating the preliminary air filtering device 30. The pre-air filter device 30 generally comprises a wall 31 made of filter material and a central air flow channel 32 defined by the wall 31, which central air flow channel 32 communicates with the engine 40 via a duct. The negative pressure generated by the suction of the engine 40 causes the air that has undergone the pre-separation treatment, outside the pre-air filtering device 30, to pass through the wall 31 into the central air flow channel 32 and be filtered at the same time. The air filtered by the pre-air filter 30 is substantially only slightly dusty and is subjected to secondary filtration by the main air filter of the engine 40 before entering the combustion chamber of the engine 40. In this way, since the cyclone separation device 20 removes larger particles and most of dust which easily cause damage and clogging to the filter element of the air filter device, the service life and the air purification efficiency of the air filter system of the impact ram can be greatly prolonged, and thus the long-term stable and reliable operation of the impact ram can be ensured, and the maintenance cost of the impact ram can be reduced.

An exemplary embodiment of cyclonic separating apparatus 20 according to the present disclosure will now be described with reference to figures 5 to 8.

Figure 5 shows a longitudinal cross-sectional view of the cyclonic separating apparatus 20. As shown in figure 5, the cyclonic separating apparatus 20 is generally cylindrical with a base at one end and comprises an outer peripheral wall 21, an inlet 22Guide fan 23, air flow channel 24, bottom wall 29, air outlet 25 and particulate outlet 26. Wherein the inlet 22 is defined by the outer circumferential wall 21 and has the same diameter as that of the outer circumferential wall 21, and the guide fan 23 is installed at the inlet 22. The air outlet 25 and the particulate outlet 26 open at the opposite axial end of the cyclonic separating apparatus 20 to the inlet 22, with the air outlet 25 being located at a radially central position of the base wall 29 and the particulate outlet 26 opening out down the wall of the peripheral wall 21. The present disclosure is not limited to the form of the bottom wall 29 shown in fig. 5, and may be other forms of transverse walls transverse to the peripheral wall 21. The diameter of the air outlet 25 is smaller than the diameters of the outer peripheral wall 21 and the inlet 22, and the diameter of the air outlet 25 can be appropriately determined according to the intake air amount of the engine and the desired separation rate of particulate matter. The guide fan 23 includes a set of blades formed in a fan shape, for example, and when the guide fan 23 is energized, the guide fan rotates around an axis, sucks air, and generates a swirling motion in the air flow passage 24 by the air sucked in the axial direction. It will be appreciated that other types of suitable blades may be used for the inducer fan 23, provided that they are capable of imparting the desired swirling motion to the airflow. The rotating air flow generates a centrifugal force, expressed by the centrifugal force formula F ═ mv²It can be seen that the centrifugal force F increases as the mass m increases, on the premise that the speed v and the radius of rotation r are constant. In actual conditions, the mass of the particulate matter in the air is much larger than the mass of the air itself, and the larger the mass, the larger the centrifugal force applied to the mass, and the further the particulate matter is thrown out in the radial direction. Thus, during the swirling travel (as indicated by the solid arrows in fig. 4) of the air flow in the airflow passage 24 of the cyclonic separating apparatus 20, the particulate matter is gradually separated from the air and proceeds in a spiral against the inner surface of the outer peripheral wall 21, while the light-weight air is mainly concentrated in the center of the airflow passage 24 and eventually discharged from the air outlet 25. The particles spiraling against the inner surface of the peripheral wall 21 pass through the particle outlet 26 in the wall surface into the dust bin 68 below the cyclonic separating apparatus 20.

The airflow passage 24 of the cyclonic separating apparatus 20, defined by the peripheral wall 21, the inducer fan 23 and the base wall 29, is preferably not very long. Generally, the length of the air flow channel 24 is 2.5 times to 3 times the diameter of the inlet 22. Thereby, the full rotation and separation of the particles can be ensured, and the particles can not lose kinetic energy due to too long distance, so that the rotation radius is reduced and finally the particles escape from the air outlet.

As can be seen from fig. 3 and 5, in order to extend the separation time and thereby improve the separation effect of the cyclonic separating apparatus 20 on small particles of dust and the like, the cyclonic separating apparatus 20 is arranged outside the upper housing portion 61 in an upwardly inclined manner from the inlet side to the outlet side so as to allow the air to stay in the cyclonic separating apparatus 20 for a longer period of time without increasing the length of the airflow passage 24. The angle of inclination of the cyclonic separating apparatus 20 may be in the range 10 to 45 degrees. The cyclonic separating apparatus 20 is formed integrally with the upper housing portion 61 at the outlet side or is secured to the upper housing portion 61. The inlet side of the cyclonic separating apparatus 20 is supported and secured by a support 67.

In addition, the guide fan 23 is detachably mounted at the inlet 22 of the cyclone separating apparatus 20, and since the cyclone separating apparatus 20 is disposed obliquely, it is possible to easily remove particles such as dust remaining in the airflow passage 24 of the cyclone separating apparatus 20 after a shutdown by removing the guide fan 23 without being discharged through the particle outlet 26.

Although it is known in the art to use cyclonic separating apparatus to separate particles of dust, silt, sand and the like from air. Such cyclonic separating apparatus is commonly used in air filtration systems of suction cleaners. As mentioned above, the operation principle of the tamping equipment is that the internal combustion engine drives the transmission device to generate the up-and-down reciprocating acting force to make the tamping equipment jump off the ground. Under the action of the acting force of the transmission device and the gravity of the tamping equipment, the tamping plate impacts the material to be compacted in a reciprocating manner so as to achieve the purpose of tamping and leveling. Thus, the use of cyclonic separating apparatus in such compaction apparatus presents the following problems: the ramming apparatus is usually operated in a high-dust environment, where the vibration frequency and amplitude during operation are very strong, and therefore the airflow in the cyclone device must be subjected to such high-frequency and high-amplitude vibrations that inevitably cause part of the particles to again leave the circumferential wall into the central air flow to be sucked into the air filter device of the internal combustion engine, resulting in a deterioration of the separation and filtration performance.

In order to solve the above problem, it is considered that in the cyclone separation apparatus 20, the closer to the guide fan 23, the stronger the swirl flow, and therefore the swirl velocity v near the air outlet 25 is smaller than the swirl velocity v near the inlet 22. Accordingly, the centrifugal separation effect in the vicinity of the air outlet 25 is weaker. Further, it is considered that the airflow in the cyclone separating apparatus 20 is disturbed by the strong vibration of the impact ram 1, causing particles of dust and the like which have been collected on the inner surface of the outer peripheral wall 21 by the centrifugal force to be rewound into the central air flow, and that such an influence of the strong vibration is particularly significant in the vicinity of the outlet where the centrifugal force is weak. For this reason, in the cyclone separating apparatus 201 according to another embodiment of the present disclosure shown in fig. 6, an annular partition wall 27 is provided on the bottom wall 29 of the cyclone separating apparatus 201 around the air outlet 25 inside the outer circumferential wall 21 for preventing separated particulate matter in the vicinity of the air outlet 25 from being entrained into the central air flow under the influence of strong vibration of the impact ram 1 and discharged into the downstream air filtering device.

As described above, the larger the mass, the larger the centrifugal force, under the same conditions. Thus, the centrifugal forces to which the fine dust is subjected are minimized in the particulate matter to be separated at any location of the cyclonic separating apparatus 20. This also means that the fine dust is the least separated and most susceptible to vibration and airflow. In order to further inhibit the separated particles from returning to the central air flow, in a cyclonic separating apparatus 202 according to a further embodiment of the disclosure shown in figure 7, a removable screening wall 28 is further provided between the dividing wall 27 and the peripheral wall 21. The sieving wall 28 is provided spaced apart from both the outer peripheral wall 21 and the partition wall 27. Unlike the partition wall 27, the screening wall 28 is primarily arranged to screen and intercept fine dust most susceptible to vibration and airflow, and therefore the screening wall 28 is provided with a plurality of openings 71 for particulate matter such as dust to enter the gap between the screening wall 28 and the peripheral wall 21, and the arrangement and extent of the screening wall 28 is not limited to the outlet end of the cyclonic separating apparatus, but may be provided over the entire length of the airflow passageway of the cyclonic separating apparatus. When the airflow containing particles such as dust is thrown toward the sieving wall 28 or travels closely to the sieving wall 28 by centrifugal force, particles (small particles) having a size smaller than that of the openings 71 pass through the openings 71 into a space between the sieving wall 28 and the outer peripheral wall 21 and are intercepted by the sieving wall 28 and the outer peripheral wall 21. In the process, the kinetic energy of the air flow, whether small particles or together with small particles, which have drilled through the openings 71, is lost to a greater extent and is less likely to return to the air flow channel 24 through the openings 71 in the partition wall 28. Small particles will slowly settle in the space between the screening wall 28 and the peripheral wall 21. Also, since the partition walls 27 and the sieving walls 28 are staggered at the end of the outlet side to form a labyrinth structure, it is more difficult for small particles intercepted between the sieving walls 28 and the outer circumferential wall 21 to return into the central air flow. The larger sized particles remain inside the screening wall 28 and, because of their greater mass, are subjected to relatively greater centrifugal and gravitational forces and are therefore less likely to be entrained by the air flow and eventually be trapped between the partition wall 27 and the screening wall 28. The particles intercepted on both sides of the screening wall 28 are either discharged via the particle outlet 26 or, as mentioned above, are poured out of the inlet 22 at shut-down. Thus, in a cyclonic separating apparatus 202 incorporating the screening wall 28, it is equivalent to moving the particles over the screen by means of wind and centrifugal force and effecting screening of the particles.

In the embodiment shown in figure 7, since the dividing wall 27 is provided at the outlet end of the cyclonic separating apparatus 202, the screening wall 28 is provided only in the region of the airflow passage 24 from the inlet end to the dividing wall 27. However, it will be appreciated by those skilled in the art that the cyclonic separating apparatus of the present disclosure may be provided with only the screening wall 28. At this point, the screening wall 28 may be disposed along the entire axial length of the airflow passageway 24. In this case, the guide fan 23 may also be disposed to extend along at least a portion of the length of the airflow passage 24 according to some embodiments of the present disclosure (not shown in the drawings).

The screening wall 28 may be made of the same or different material as the cyclonic separating apparatus 202. For example, both may be made of a plastic material such as polyurethane that has good wear resistance, high strength, light weight, and long service life. Alternatively, the sifting wall 28 may be made of a metallic material such as stainless steel. According to the embodiment shown in fig. 7, the screening wall 28 may be detachably fixed to the frame of the induced draft fan 23, for example by clamping, screwing, interference or snap fitting, etc. Alternatively, referring to figure 8, 2 or more legs 72 may be provided on the inner surface of the cyclonic separating apparatus 202 at the bottom end at which the air outlet 25 is provided, the screening wall 28 being held in place by the legs 72 in a clamping, interference or snap fit arrangement. The legs 72 are preferably arranged so as not to obstruct the particulate outlet and not to interfere with the normal flow of the particulate.

The size and distribution of the openings 71 can be suitably determined according to the size of the particles to be intercepted. The opening 71 may have any suitable shape as long as it allows the particulate matter to easily enter the space between the sieving wall 28 and the outer peripheral wall 21. The shape may be, for example, circular, oval, rectangular, square, triangular, hexagonal, octagonal, and the like. Furthermore, because the screening wall 28 is removable, one skilled in the art can choose to fit the screening wall 28 with an appropriate opening size and opening distribution to achieve as efficient a separation of particulate matter as possible for a cyclonic separating apparatus according to the present disclosure, depending on the particular application for which the cyclonic separating apparatus 202 is used. For example, the area of the openings in the screening wall per unit area may decrease progressively from the inlet end towards the outlet end of the cyclonic separating apparatus, since larger and more particles enter the double structure of screening wall and peripheral wall near the inlet end, while only smaller and less particles enter near the outlet end. In some embodiments, where the same number of openings are present in a unit area screening wall, the size of the openings near the inlet end may be designed to be larger than the size of the openings near the outlet end. Alternatively, where the aperture sizes are the same, there are a greater number of apertures near the inlet end and a lesser number of apertures near the outlet end in the unit area screening wall. Alternatively, the apertures proximate the inlet end are larger in number and size than the apertures proximate the outlet end. However, it is also possible that the number and size of the openings are arranged uniformly in the screening wall.

The actual flow of the gas stream in the cyclone separator and the actual separation process are rather complicated and cannot be described exactly with mathematical models until now. The calculation algorithms disclosed in the prior art are only effective for a small number of geometries and operating conditions of the cyclone. Furthermore, in the tamping plant the movement of the air flow in the cyclone separation device is made more complicated by the strong vibrations of the tamping plant. Basically, if the movement of the particles in the cyclone device is simplified, on the one hand the particles have a movement component which moves in the axial direction of the cyclone device as a result of the internal combustion engine suction; on the other hand, the particles have a radial component of movement due to the centrifugal force generated by the rotation of the inducer fan of the cyclone separator, which, superimposed, causes the particles to reach the sieve wall of the cyclone separator obliquely. Correspondingly, in the cyclone device 203 according to the embodiment shown in fig. 8, a guide 73 is also provided at the end of the screening wall near the inlet 22 for directing the particles thrown against the peripheral wall, together with a small amount of air, directly to the space between the screening wall 28 and the peripheral wall 21. The guide 73 is disposed downstream of the air outlet of the guide fan 23 in the flow direction, and has one end connected to the sieving wall 28 or integrally formed with the sieving wall 28. The guide 73 is preferably streamlined so as to smoothly and easily guide the particulate matter to the space between the sieving wall 28 and the peripheral wall 21. In addition, other types of guides, for example linear guides, are also conceivable, as long as they enable the above-described guiding function. In this case, the openings in the screening wall 28 may be made smaller, or may not even be made, or only some openings may be made in the part near the inlet end, since a large part of the particles can be directed by the guide 73 directly to the space between the screening wall 28 and the peripheral wall 21 and the centrifugal separation effect of the central air flow is already less pronounced.

The air filtration system of the tamping apparatus is described herein with reference to a fired battering ram, but the inventive concepts of the present disclosure are equally applicable to gas-solid separation in other suitable construction machines.

Although various embodiments and modifications of the present disclosure have been specifically described above, it will be understood by those skilled in the art that the present disclosure is not limited to the specific embodiments and modifications described above but may include other various possible combinations and combinations. Other modifications and variations may be effected by one skilled in the art without departing from the spirit and scope of the disclosure. All such variations and modifications are intended to fall within the scope of the present disclosure. Moreover, all the components described herein may be replaced by other technically equivalent components.

Claims (10)

1. A compaction apparatus including an internal combustion engine as a power source of the compaction apparatus, characterized by further comprising:

a cyclone separating device that purifies intake air of the internal combustion engine, the cyclone separating device including a cylindrical outer peripheral wall, an inlet, a guide fan provided in the inlet, a lateral wall provided laterally to the outer peripheral wall, an air outlet provided at a central position of the lateral wall, and a particulate matter outlet that opens on the outer peripheral wall adjacent to the lateral wall.

2. The compaction apparatus according to claim 1, wherein the cyclonic separating apparatus further comprises a divider wall located radially inwardly of the outer peripheral wall, the divider wall extending from the transverse wall to an inlet side around the air outlet.

3. The compaction apparatus according to claim 1 or 2, wherein the cyclonic separating apparatus further comprises a screening wall radially interposed between the particulate matter outlet and the air outlet, the screening wall having a plurality of apertures formed therein and a space between the screening wall and the peripheral wall for receiving particulate matter passing through the screening wall.

4. The compaction apparatus according to claim 3, wherein the screening wall is detachably fixed to the frame of the induced draft fan.

5. The compaction apparatus according to claim 3, wherein two or more legs are formed on the transverse wall at intervals at a position away from the particulate matter outlet, the sieving wall being detachably fixed to the legs.

6. The compaction apparatus according to claim 3, wherein a guide is further provided at an end of the screening wall near the inlet, the guide being provided to be positioned downstream of the air outlet of the deflector fan in the flow direction to direct particulate matter directly to the space between the screening wall and the peripheral wall.

7. The compaction apparatus according to claim 1 or 2, wherein the peripheral wall, the deflector fan and the transverse wall define an air flow channel of the cyclonic separating apparatus, the length of the air flow channel being 2.5 to 3 times the diameter of the inlet.

8. The compaction apparatus according to claim 1 or 2, wherein the cyclonic separating means is arranged in an upwardly inclined manner from the inlet side to the outlet side.

9. The compaction apparatus according to claim 8, wherein the cyclonic separating apparatus is inclined upwardly from 10 to 45 degrees from the inlet side to the outlet side.

10. The compaction apparatus according to claim 1 or 2, further comprising a pre-air filtration device disposed downstream of the cyclonic separation device and a main filtration device of the internal combustion engine itself.

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