Bag type dust collector for railway ballast bed sewage suction truck

Abstract

The invention relates to a bag type dust collector for a railway ballast bed sewage suction truck. The bag type dust collector comprises a plurality of ash buckets; a plurality of filtration chambers; the air suction assembly comprises a plurality of dispersion covers and a plurality of air suction pipes, and the outlet end of each air suction pipe communicates with the corresponding dispersion cover; the plurality of ash buckets are divided into a plurality of ash bucket groups along the airflow direction, and each ash bucket group at least comprises two adjacent ash buckets; each dust hopper group is at least matched with one dispersion cover, a plurality of guide plates are arranged in the dispersion cover, the guide plates are distributed at intervals in the flow direction of the airflow, and the arrangement heights of the guide plates are sequentially increased in the flow direction of the airflow, so that the airflow flows downwards after being decelerated and dispersed and homogenized in the dispersion cover. According to the bag type dust collector disclosed by the invention, the structure of the air suction assembly is optimized, so that the balance of the air volume and the uniformity of sewage suction are ensured, the uniformity of the longitudinal ash load and the transverse ash load of each chamber of the bag type dust collector is ensured, the working efficiency of the bag type dust collector is improved, the running resistance is reduced, and the service life of a filter material in the filter chamber is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of railway roadbed sewage suction vehicles, in particular to a bag dust collector used for railway roadbed sewage suction vehicles. Background Art

[0002] The surface of the railway track bed often has deposited dust, solid debris, tiny stones, rail grinding chips and other dirt. When the train passes at high speed, it may be swept up by the airflow and damage the train sensor. Therefore, the roadbed suction truck is often used to clean the roadbed. Existing roadbed suction trucks are usually equipped with bag dust collectors to remove the dirt sucked away before discharging. The operating speed (the speed of the roadbed suction truck on the roadbed during operation) is approximately 10km / h, and the non-working speed is approximately 100km / h. Such application scenarios require the bag dust collector of the roadbed suction truck to be small in size, large in processing air volume, and balanced in ash load in the horizontal and vertical sections. In order to ensure the suction effect of the railway roadbed suction truck, and to ensure that the bag dust collector can be well connected with the air duct of the operating trolley in a limited space, the flow rate of the suction duct of the bag dust collector exceeds 50m / s, and the filtering wind speed of the bag dust collector is 4m / s.

[0003] like Figure 1 As shown, the bag filter usually includes a bag filter assembly, a plurality of ash hoppers 1 and three suction pipes. The bag filter assembly includes a plurality of filter chambers 2. The ash hoppers 1 are arranged one by one below the filter chambers 2. A collection chamber 3a is arranged between the bag filter assembly and the suction pipe. Three suction pipes with the same diameter are at the same horizontal position and are connected to the collection chamber 3a respectively. Since the flow rate in the suction pipe is relatively high, in order to avoid the air flow rate entering the collection chamber 3a being too fast and strongly impacting the filter chamber 2, the inlet end of the suction pipe located in the collection chamber 3a is guided by an elbow 4a for upward exhaust. In this way, the airflow introduced into the collection chamber 3a by the suction pipe flows upward first through the elbow 4a, and will not directly impact the filter chamber 2. Moreover, the airflow impacts the top plate of the collection chamber 3a upward to cause turbulence, which can balance the cross-sectional airflow distribution. Then, the airflow flows downward and flows to the first filter bag and the first ash hopper.

[0004] In the above scheme, due to the setting of the collecting chamber 3a, the airflows of the three air suction pipes first reflux in the collecting chamber 3a and then are distributed, resulting in the uncontrollable uniformity of the airflow and ash load. This scheme has two obvious disadvantages:

[0005] (1) Since the three suction pipes are at the same horizontal position, the connections between the three suction pipes and the collecting chamber 3a are at different positions at the same horizontal height, resulting in different pressure losses at the three connections, which in turn leads to uneven sewage suction effects of the three suction pipes.

[0006] (2) After entering the collecting chamber 3a, the dirt first moves upward, hits the top plate of the collecting chamber 3a and rebounds to the bottom, thus causing the dirt to lose kinetic energy in the horizontal direction. Driven by the airflow formed by the fan, the dirt moves to the space between the filter chamber 2 and the ash hopper 1. Large-sized dirt has a greater gravity and is not easily driven upward by the airflow, so it will fall into the first ash hopper 1. Part of the medium-sized dirt will fall into the first ash hopper 1, and part will settle and move to the second ash hopper 1. Small-sized dirt will enter the filter chamber 2 with the airflow, be intercepted by the filter bag, and evenly settle in each ash hopper 1 through the spray cleaning process. Since the roadbed dirt contains a large amount of large-sized dirt, the ash load in the first ash hopper 1 far exceeds that of other ash hoppers, and the ash loads in various parts in the longitudinal and transverse directions are greatly different. In addition, in order to prevent the filter bag from being washed away after being full of ash, it is necessary to unload the ash frequently, which greatly reduces the work efficiency. The lateral ash load distribution of the bag filter is affected by the dust mixing distribution in the collecting chamber 3a, and the balance of the lateral ash load distribution is weak. Summary of the invention

[0007] Based on the above-mentioned defects in the prior art, the purpose of the present invention is to provide a bag dust collector, optimize the structure of the suction component, ensure the balance of air volume, uniform pollution suction, ensure the uniformity of the longitudinal ash load and the lateral ash load in each chamber of the bag dust collector, improve the working efficiency of the bag dust collector, reduce the operating resistance, and extend the service life of the filter material in the filter chamber.

[0008] To this end, the present invention provides the following technical solutions.

[0009] The present invention provides a bag dust collector for a railway roadbed sewage suction vehicle, the bag dust collector comprising:

[0010] A plurality of ash hoppers for collecting waste;

[0011] A plurality of filter chambers for filtering dust-laden airflow;

[0012] An air suction assembly is located between the plurality of ash hoppers and the plurality of filter chambers; the air suction assembly comprises a plurality of dispersion hoods and a plurality of air suction pipes arranged side by side along a first horizontal direction, the outlet end of each air suction pipe is respectively connected to a dispersion hood, and the opening of the dispersion hood faces downward;

[0013] The plurality of ash hoppers are divided into a plurality of ash hopper groups along the airflow direction, each of the ash hopper groups includes at least two adjacent ash hoppers; each ash hopper group is matched with at least one dispersion cover, and the inlet of each ash hopper in the ash hopper group is respectively opposite to the opening of the corresponding dispersion cover;

[0014] A plurality of guide plates are provided in the dispersion hood, the guide plates are arranged vertically, the guide plates are spaced apart and distributed along the airflow direction, and the setting heights of the guide plates are successively increased along the airflow direction; the plurality of guide plates are used to slow down the airflow entering the dispersion hood and disperse it evenly in the dispersion hood before flowing downward.

[0015] Optionally, the plurality of ash hoppers are distributed in sequence along the second horizontal direction, and the plurality of filter chambers are distributed in sequence along the second horizontal direction and are arranged above the ash hoppers in a one-to-one correspondence.

[0016] Optionally, all the dispersion covers are spaced apart and distributed along the second horizontal direction;

[0017] And / or, the second horizontal direction is perpendicular to the first horizontal direction.

[0018] Optionally, the longitudinal section of the top of the dispersion cover is in an inverted V shape.

[0019] Optionally, the air suction assembly includes a first air suction pipe, a second air suction pipe and a third air suction pipe arranged side by side in a first horizontal direction, the outlet end of the first air suction pipe is connected to a first dispersion cover, the outlet end of the second air suction pipe is connected to a second dispersion cover, and the outlet end of the third air suction pipe is connected to a third dispersion cover;

[0020] The length of the second air suction pipe is less than the length of the first air suction pipe and less than the length of the third air suction pipe, and the second dispersion cover, the first dispersion cover and the third dispersion cover are spaced apart and distributed along the second horizontal direction.

[0021] Optionally, the number of the ash hoppers and the number of the filter chambers are both six, and the six ash hoppers are divided into a first ash hopper group, a second ash hopper group and a third ash hopper group along the airflow direction, and each ash hopper group includes two ash hoppers;

[0022] The openings of the first dispersion cover are respectively opposite to the two ash hoppers of the first ash hopper group, the openings of the second dispersion cover are respectively opposite to the two ash hoppers of the second ash hopper group, and the openings of the third dispersion cover are respectively opposite to the two ash hoppers of the third ash hopper group.

[0023] Optionally, the first air suction pipe comprises a first inlet straight pipe, a first curved pipe section, a first straight pipe section and a second curved pipe section which are connected in sequence, the second air suction pipe comprises a second inlet straight pipe, a third curved pipe section and a second straight pipe section which are connected in sequence, and the third air suction pipe comprises a third inlet straight pipe, a fourth curved pipe section, a third straight pipe section and a fifth curved pipe section which are connected in sequence;

[0024] The first curved pipe section, the third curved pipe section and the fourth curved pipe section are arranged side by side, the first curved pipe section is bent downward in a direction away from the third curved pipe section, the third curved pipe section is bent downward, and the fourth curved pipe section is symmetrically arranged with the first curved pipe section about a vertical plane where the central axis of the first inlet straight pipe is located;

[0025] The first inlet straight pipe and the first straight pipe section extend respectively along the second horizontal direction, and the second curved pipe section is used to connect the first straight pipe section with the first dispersion cover; the axes of the second inlet straight pipe, the third curved pipe section and the second straight pipe section are in the same vertical plane, the second inlet straight pipe and the second straight pipe section extend respectively along the second horizontal direction, and the second straight pipe section is connected with the second dispersion cover; the third inlet straight pipe and the third straight pipe section extend respectively along the second horizontal direction, and the fifth curved pipe section is used to connect the third straight pipe section with the third dispersion cover.

[0026] Optionally, the inner diameters of the first air suction pipe, the second air suction pipe and the third air suction pipe are equal, and the inner diameter R1 is ≤450 mm;

[0027] The bending radius of the first bend pipe section and the fourth bend pipe section are equal, and 175mm≤bending radius R2≤215mm; the bending radius of the third bend pipe section is R3, and 90mm≤bending radius R3≤110mm; the bending radius of the second bend pipe section and the fifth bend pipe section are equal, and 185mm≤bending radius R4≤225mm.

[0028] Optionally, the guide plate includes a first transverse plate body, a vertical plate body and a second transverse plate body connected in sequence, and the first transverse plate body, the vertical plate body and the second transverse plate body together form a concave cavity, and the opening of the concave cavity is opposite to the outlet end of the corresponding suction pipe.

[0029] Optionally, the outlet end of the air suction pipe extends along the second horizontal direction, the first transverse plate is located above the second transverse plate, the width of the first transverse plate and the width of the second transverse plate extend along the second horizontal direction respectively, and the vertical plate extends along the vertical direction; the width of the first transverse plate is greater than the width of the second transverse plate; the second horizontal direction is perpendicular to the first horizontal direction;

[0030] And / or, in the same dispersion hood, the height difference between the top walls of two adjacent guide plates is ΔH, the cross-sectional area of ​​the outlet end of the suction pipe corresponding to the corresponding height difference ΔH is S1, and the total cross-sectional area of ​​the outlet end of the suction pipe is S2, S1=S2 / (n+1), where n is the number of guide plates in the dispersion hood.

[0031] The present invention has the following technical effects:

[0032] The present invention provides a bag dust collector, in which each suction pipe independently transports dirt to a corresponding ash hopper group. The single-channel pipeline design simplifies airflow distribution, balances the load of each ash hopper and balances the longitudinal ash load. Each ash hopper group evenly shares the load of large-sized dirt and medium-sized dirt. In addition, a dispersion hood is respectively arranged at the outlet end of each suction pipe, and each ash hopper group is matched with at least one dispersion hood. A plurality of guide plates are arranged in the dispersion hood, and the positional relationship of all the guide plates is defined. In this way, it is possible to reduce or avoid the pressure loss difference at the outlet ends of the three suction pipes, and it is also possible to ensure that the airflow can be better uniformized at the outlet position of the dispersion hood, thereby ensuring that the amount of smoke and dust entering each ash hopper from each suction pipe through the corresponding dispersion hood is balanced, the airflow in each chamber is more uniform, and the lateral ash load is more balanced, thereby avoiding frequent ash unloading due to excessive load on individual ash hoppers. The air suction component of this solution ensures the balance of air volume and uniform dirt suction, ensures the uniformity of the longitudinal ash load and the lateral ash load of each chamber of the bag dust collector, improves the working efficiency of the bag dust collector, reduces the operating resistance, and extends the service life of the filter material in the filter chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural diagram of a bag dust collector in the prior art;

[0034] Figure 2 A top view of the air suction assembly of the present invention;

[0035] Figure 3 is a side view of the air suction assembly of the present invention;

[0036] Figure 4 It is a rear view of the air suction assembly of the present invention;

[0037] Figure 5 It is a side view of the bag filter of the present invention;

[0038] Figure 6 A top view of a bag filter of the present invention;

[0039] Figure 7 It is a rear view of the bag filter of the present invention;

[0040] Figure 8 A front view of a first dispersion cover of the present invention;

[0041] Fig. 9 is a side view of a first dispersion hood of the present invention;

[0042] Fig.10 It is a velocity distribution cloud diagram of the middle section of the bag filter during the simulation operation of the present invention;

[0043] Fig.11 It is the velocity vector diagram of the bag filter during the simulation operation of the present invention;

[0044] Fig.12 It is a velocity distribution cloud diagram of the cross section 100 mm below the filter chamber during the simulation operation of the present invention;

[0045] Fig.13 It is a cloud diagram of the air flow velocity during the simulation calculation of the present invention.

[0046] Description of Reference Numerals

[0047] 100. Bag dust collector;

[0048] 1. Ash hopper;

[0049] 2. Filter chamber;

[0050] 3. Air suction component;

[0051] 31. first air suction pipe; 311. first inlet straight pipe; 312. first curved pipe section; 313. first straight pipe section; 314. second curved pipe section;

[0052] 32. second air suction pipe; 321. second inlet straight pipe; 322. third curved pipe section; 323. second straight pipe section;

[0053] 33, the third air suction pipe; 331, the third inlet straight pipe; 332, the fourth curved pipe section; 333, the third straight pipe section; 334, the fifth curved pipe section;

[0054] 34, first dispersion cover; 341, first side wall; 342, second side wall; 343, third side wall; 35, second dispersion cover; 36, third dispersion cover;

[0055] 37. guide plate; 371. first transverse plate; 372. vertical plate; 373. second transverse plate; 374. concave cavity;

[0056] 4. Shell;

[0057] 3a, collecting chamber; 4a, elbow. DETAILED DESCRIPTION

[0058] In order to make the technical solutions and beneficial effects of the present invention more clearly understood, the following is a detailed description by listing specific embodiments. Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application belongs.

[0059] In the description of the present invention, unless otherwise explicitly defined, terms such as “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “height”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of simplified description of the present invention, and do not indicate that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and should not be understood as a limitation on the present invention.

[0060] In the present invention, the terms "first" and "second" are only used for the purpose of clear description and cannot be understood as the relative importance of the indicated features or the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly include at least one of the features. In the description of the present invention, "multiple" means at least two; "several" means at least one, unless otherwise clearly defined.

[0061] In the present invention, unless otherwise clearly defined, the terms "install", "connect", "connect", "fix", "set", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral molding; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present invention, unless otherwise clearly defined, a first feature being “on”, “above”, “above”, “below”, “below”, “below” or “below” a second feature may mean that the first feature is in direct contact with the second feature, or the first feature and the second feature are in indirect contact with each other through an intermediate medium. Moreover, a first feature being “on”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than the horizontal height of the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0063] The "first horizontal direction a" and the "second horizontal direction b" mentioned in the present invention are both Figures 1 to 7 The markings in shall prevail.

[0064] According to the following Figures 2 to 13 The bag filter of the present invention is described in detail.

[0065] In this embodiment, the bag filter 100 is used for a railway track bed suction vehicle. Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the bag dust collector 100 includes a plurality of ash hoppers 1, a plurality of filter chambers 2 and an air suction assembly 3. The ash hopper 1 is located below the filter chamber 2. The ash hopper 1 cooperates with the corresponding filter chamber 2 to form a corresponding dirt treatment chamber. The ash hopper 1 is used to collect dirt. The filter chamber 2 includes a plurality of filter bags (for example, fifteen filter bags). The filter chamber 2 filters the dust-containing airflow through the filter bags. The air suction assembly 3 is located between the ash hopper 1 and the filter chamber 2. The air suction assembly 3 includes a plurality of dispersion hoods and a plurality of air suction pipes arranged side by side along the first horizontal direction a. The outlet end of each air suction pipe is respectively connected to a dispersion hood, and the opening of the dispersion hood faces downward.

[0066] All ash hoppers 1 are divided into multiple ash hopper groups along the airflow direction, and each ash hopper group includes at least two adjacent ash hoppers 1. Each ash hopper group is matched with at least one dispersion cover, and the inlet of each ash hopper 1 in the ash hopper group is respectively opposite to the opening of the corresponding dispersion cover. Each air inlet pipe operates independently, and the air inlet pipe sends the sucked dirt to the matching dispersion cover. The dirt is dispersed in the dispersion cover and then moves to the corresponding ash hopper 1. Compared with the technical solution of setting the collection chamber 3a in the prior art, this solution omits the collection chamber 3a, which can reduce or avoid the pressure loss difference at the outlet end of the three suction pipes, and thus can improve the uniformity of the dirt suction effect of the three suction pipes.

[0067] In addition, each dispersion hood is provided with a plurality of guide plates 37, which are arranged vertically, and all the guide plates 37 are spaced and distributed along the airflow direction, and the setting heights of all the guide plates 37 are successively increased along the airflow direction. In this way, when the dust-laden airflow in the air suction pipe enters the corresponding dispersion hood, part of the airflow is blocked by the first guide plate 37, and cannot continue to move forward and flows downward, and part of the airflow is blocked by the second guide plate 37, and cannot continue to move forward and moves downward, and so on, until the remaining airflow hits the inner wall of the dispersion hood and moves downward. By arranging a plurality of guide plates 37 in the dispersion hood and limiting the positional relationship of all the guide plates 37, within the limited space of the dispersion hood, the airflow rushing into the dispersion hood at high speed can be quickly reduced in velocity and quickly uniformized by breaking up, and discharged from the outlet of the dispersion hood at low speed and balance, avoiding the airflow rushing into the ash hopper 1 at high speed and causing secondary dust, and avoiding the excessive concentrated discharge of the airflow and causing large load differences of each ash hopper 1, thereby improving the dust removal effect.

[0068] In the above technical scheme, each suction pipe independently transports waste to the corresponding ash hopper group. The single-line design simplifies airflow distribution, balances the load of each ash hopper and balances the longitudinal ash load. Each ash hopper group evenly shares the load of large-sized waste and medium-sized waste. In addition, a dispersion hood is respectively arranged at the outlet end of each suction pipe, and each ash hopper group is matched with at least one dispersion hood. A plurality of guide plates 37 are arranged in the dispersion hood, and the positional relationship of all the guide plates 37 is defined. Under the premise of reducing or avoiding the pressure loss difference at the outlet ends of the three suction pipes, it can also ensure that the airflow can be better uniformed at the outlet position of the dispersion hood, thereby ensuring that each suction pipe enters each ash hopper 1 through the corresponding dispersion hood. The amount of flue gas and dust is balanced, the airflow in each chamber is more uniform, and the lateral ash load is more balanced, thereby avoiding frequent ash unloading due to excessive load of individual ash hoppers 1. The suction component 3 of this solution can ensure the balance of air volume, uniform dirt suction, and uniformity of longitudinal and transverse ash loads in each chamber of the bag dust collector 100, thereby improving the working efficiency of the bag dust collector 100, reducing operating resistance, and extending the service life of the filter material in the filter chamber.

[0069] In one embodiment, in order to facilitate the miniaturization design of the bag filter 100, as shown in FIG. Figure 5 As shown, all the ash hoppers 1 are distributed in sequence along the second horizontal direction b, and all the filter chambers 2 are distributed in sequence along the second horizontal direction b and are arranged one by one above the ash hoppers 1. One ash hopper 1 and one filter chamber 2 constitute a waste treatment chamber. Specifically, when the railway roadbed suction truck is cleaning, the railway roadbed suction truck drives forward along the roadbed, and the second horizontal direction b is in the front and rear direction of the railway roadbed suction truck. In this way, it is conducive to reducing the width of the railway roadbed suction truck, which is convenient for fast walking in the application scenario of the railway. Of course, the arrangement of the ash hoppers 1 and the filter chambers 2 is not limited to this. All the ash hoppers 1 can be arranged in a staggered manner, and all the filter chambers 2 can also be arranged in a staggered manner. One filter chamber 2 can also correspond to two ash hoppers 1. The bag dust collector 100 also includes a shell 4, all the filter chambers 2 and the suction assembly 3 are located in the shell 4, and all the ash hoppers 1 are respectively connected to the bottom of the shell 4.

[0070] In one embodiment, if Figure 2 As shown, all the dispersion covers are spaced apart and distributed along the second horizontal direction b, and the arrangement is more compact, which facilitates the arrangement of multiple independent air inlet pipes and matching dispersion covers within the limited space of the bag dust collector 100.

[0071] In one embodiment, if Figure 2 As shown, the second horizontal direction b is perpendicular to the first horizontal direction a, which is beneficial to reducing the space occupied by the suction component 3.

[0072] In one embodiment, if Figure 4 and Figure 7As shown, the longitudinal section of the top of the dispersion hood is inverted V-shaped, and the top of the dispersion hood is a pointed top, which can reduce or avoid dust accumulation on the top wall inside the dispersion hood. Specifically, according to the requirements of the repose angle of the load dirt and dust, the inclination angle of the top wall inside the dispersion hood is designed, so that dust is not easy or will not accumulate on the top wall inside the dispersion hood, ensuring the dust removal effect. The cross section of the body of the dispersion hood can be square or circular, and the diameter of the outlet of the dispersion hood should be as large as possible to ensure better airflow dispersion.

[0073] In one embodiment, if Figure 2 As shown, the suction assembly 3 includes a first suction pipe 31, a second suction pipe 32 and a third suction pipe 33 arranged side by side in the first horizontal direction a. The number of suction pipes is three, which can meet the demand of sucking dirt from three areas of the roadbed at the same time, and can also avoid the bag dust collector 100 being too large due to the excessive number of suction pipes. The outlet end of the first suction pipe 31 is connected to the first dispersion cover 34, the outlet end of the second suction pipe 32 is connected to the second dispersion cover 35, and the outlet end of the third suction pipe 33 is connected to the third dispersion cover 36. The first dispersion cover 34, the second dispersion cover 35 and the third dispersion cover 36 have the same structure and size, and the number of guide plates configured in each dispersion cover can be different. The length of the second suction pipe 32 is less than the length of the first suction pipe 31 and less than the length of the third suction pipe 33. The second dispersion cover 35, the first dispersion cover 34 and the third dispersion cover 36 are spaced apart and distributed along the second horizontal direction b. The components are compactly arranged, which is conducive to the miniaturization design of the suction assembly 3.

[0074] Furthermore, if Figure 5 As shown, the number of ash hoppers 1 and filter chambers 2 are six, and the six ash hoppers 1 are divided into a first ash hopper group, a second ash hopper group and a third ash hopper group along the airflow direction, and each ash hopper group includes two ash hoppers 1, that is, the first ash hopper 1 and the second ash hopper 1 constitute the first ash hopper group, the third ash hopper 1 and the fourth ash hopper 1 constitute the second ash hopper group, and the fifth ash hopper 1 and the sixth ash hopper 1 constitute the third ash hopper group. The openings of the second dispersion cover 35 are respectively opposite to the two ash hoppers 1 of the first ash hopper group, the openings of the first dispersion cover 34 are respectively opposite to the two ash hoppers 1 of the second ash hopper group, and the openings of the third dispersion cover 36 are respectively opposite to the two ash hoppers 1 of the third ash hopper group.

[0075] When the railway roadbed suction truck is in operation, the dirt sucked by the first suction pipe 31 is discharged after being decelerated and homogenized by the first dispersion cover 34, and most of the dirt enters the third ash hopper 1 and the fourth ash hopper 1 in a balanced manner, and a small part of the dirt enters the third filter chamber 2 and the fourth filter chamber 2 for filtering. The dirt sucked by the second suction pipe 32 is discharged after being decelerated and homogenized by the second dispersion cover 35, and most of the dirt enters the first ash hopper 1 and the second ash hopper 1 in a balanced manner, and a small part of the dirt enters the first filter chamber 2 and the second filter chamber 2 for filtering. The dirt sucked by the third suction pipe 33 is discharged after being decelerated and homogenized by the third dispersion cover 36, and most of the dirt enters the fifth ash hopper 1 and the sixth ash hopper 1 in a balanced manner, and a small part of the dirt enters the fifth filter chamber 2 and the sixth filter chamber 2 for filtering. In this solution, the load of each ash hopper 1 is more balanced, avoiding frequent unloading due to excessive load of individual ash hoppers 1.

[0076] Of course, the number of ash hoppers 1 and filter chambers 2 is not limited to six, but can be two, four, eight or even more. Of course, the number of ash hoppers 1 may not be equal to the number of filter chambers 2, and the number of ash hoppers 1 in each ash hopper group may exceed two.

[0077] In addition, due to the space limitation in the bag filter 100, the size of the dispersion hood will not be too large to cause the spacing between the three suction pipes to be too large, such as Figure 5 As shown, the inlets of the two ash hoppers 1 of the ash hopper group will not be completely covered by the dispersion cover, so that the airflow will not be affected to flow upward to the filter area, and the dirt will not be affected to fall into the ash hopper 1.

[0078] Furthermore, if Figures 2 to 4As shown, the first air suction pipe 31 includes a first inlet straight pipe 311, a first curved pipe section 312, a first straight pipe section 313 and a second curved pipe section 314 which are connected in sequence, the second air suction pipe 32 includes a second inlet straight pipe 321, a third curved pipe section 322 and a second straight pipe section 323 which are connected in sequence, and the third air suction pipe 33 includes a third inlet straight pipe 331, a fourth curved pipe section 332, a third straight pipe section 333 and a fifth curved pipe section 334 which are connected in sequence. The first curved pipe section 312, the third curved pipe section 322 and the fourth curved pipe section 332 are arranged side by side, the first curved pipe section 312 is bent downward in a direction away from the third curved pipe section 322, the third curved pipe section 322 is bent downward, the fourth curved pipe section 332 and the first curved pipe section 312 are arranged symmetrically with respect to the vertical plane where the central axis of the first inlet straight pipe 311 is located, and the bending angles of the fourth curved pipe section 332 and the first curved pipe section 312 are not easy to be too large, so as to avoid causing the volume of the air suction component 3 to be too large, and it is only necessary to ensure that the adjacent air inlet pipes do not interfere with each other. The first inlet straight pipe 311 and the first straight pipe section 313 extend respectively along the second horizontal direction b, and the second curved pipe section 314 is used to connect the first straight pipe section 313 with the first dispersion cover 34. The axes of the second inlet straight pipe 321, the third curved pipe section 322 and the second straight pipe section 323 are in the same vertical plane. The second inlet straight pipe 321 and the second straight pipe section 323 extend along the second horizontal direction b respectively, and the second straight pipe section 323 is connected to the second dispersion cover 35. The third inlet straight pipe 331 and the third straight pipe section 333 extend along the second horizontal direction b respectively, and the fifth curved pipe section 334 is used to connect the third straight pipe section 333 and the third dispersion cover 36. The air suction assembly 3 of this solution has a compact structure and simple airflow distribution, and can be applied to the bag dust collector 100 with limited space. This solution can use an elbow structure as the curved pipe section.

[0079] Furthermore, if Figure 2 As shown, the inner diameters of the first suction pipe 31, the second suction pipe 32 and the third suction pipe 33 are equal, and the inner diameter R1≤450mm to ensure the suction effect. The bending radius of the first bend section 312 and the fourth bend section 332 are equal, and 175mm≤bending radius R2≤215mm; the bending radius of the third bend section 322 is R3, and 90mm≤bending radius R3≤110mm; the bending radius of the second bend section 314 and the fifth bend section 334 are equal, and 185mm≤bending radius R4≤225mm. In this solution, the size design of each section of the pipeline can reduce the resistance encountered when the fluid moves in the pipeline, ensure the balance of resistance in each pipeline, and facilitate the balancing of ash load.

[0080] Furthermore, if Figure 2 As shown, when looking down at the air suction assembly 3, the maximum angle α between the first curved pipe section 312 and the fourth curved pipe section 332 and the first air suction pipe 31 is 39.12°. Figure 4 As shown, when looking directly at the air suction assembly 3 from the inlet end of the air suction pipe, the angle β between the first curved pipe section 312 and the fourth curved pipe section 332 and the first air suction pipe 31 is 28°.

[0081] In one embodiment, if Figure 3 As shown, the guide plate 37 includes a first transverse plate body 371, a vertical plate body 372 and a second transverse plate body 373 connected in sequence. Figure 2 As shown, the length of the guide plate 37 extends along the first direction a, and the two sides of the guide plate 37 in the first direction a are respectively connected to the inner walls of the two sides of the corresponding dispersion cover, as shown in FIG. Figure 3 As shown, the first transverse plate 371 is located above the second transverse plate 373, and the first transverse plate 371, the vertical plate 372 and the second transverse plate 373 together form a concave cavity 374, and the opening of the concave cavity 374 is opposite to the outlet end of the corresponding air suction pipe. In this way, when the airflow in the air suction pipe enters the concave cavity 374 of the guide plate 37, the airflow will circulate in the concave cavity 374, and part of the airflow will hit the first transverse plate 371 and flow downward, so that the airflow is maximally uniform at the outlet position of the dispersion hood.

[0082] Furthermore, if Figure 3 As shown, the outlet end of the air suction pipe extends along the second horizontal direction b, the width of the first horizontal plate 371 and the width of the second horizontal plate 373 extend along the second horizontal direction b respectively, and the vertical plate 372 extends along the vertical direction. The width of the first horizontal plate 371 is greater than the width of the second horizontal plate 373, which ensures that the airflow has a certain flow rate while uniformizing the airflow and maintaining the dust removal efficiency. Preferably, the width of the first horizontal plate 371 is 50 mm, the height of the vertical plate 372 is 250 mm, and the width of the second horizontal plate 373 is 30 mm.

[0083] In one embodiment, if Figure 2 , Figure 3 and Figure 5 As shown, the number of guide plates 37 in the second dispersion hood 35 is three, wherein two guide plates 37 are located above the first ash hopper 1, and the remaining guide plate 37 is located above the second ash hopper 1; the number of guide plates 37 in the first dispersion hood 34 is three, wherein two guide plates 37 are located above the third ash hopper 1, and the remaining guide plate 37 is located above the fourth ash hopper 1; the number of guide plates 37 in the third dispersion hood 36 is three, wherein two guide plates 37 are located above the fifth ash hopper 1, and the remaining guide plate 37 is located above the sixth ash hopper 1.

[0084] In one embodiment, if Figure 3As shown, in the same dispersion hood, the height difference between the top walls of two adjacent guide plates 37 is ΔH, and the cross-sectional area of ​​the outlet end of the suction pipe corresponding to the corresponding height difference ΔH is S1, and the total cross-sectional area of ​​the outlet end of the suction pipe is S2, S1=S2 / (n+1), n ​​is the number of guide plates in the dispersion hood. The second dispersion hood 35 is taken as an example for specific explanation. The second dispersion hood 35 has three guide plates 37. In the direction of air flow, there is a height difference ΔH1 between the first transverse plate bodies 371 of the first guide plate 37 and the second guide plate 37, and there is a height difference ΔH2 between the first transverse plate bodies 371 of the second guide plate 37 and the third guide plate 37. The cross-sectional area of ​​the outlet end of the second suction pipe 32 between the first transverse plate bodies 371 of the first guide plate 37 and the second guide plate 37 is S1, and the cross-sectional area of ​​the outlet end of the second suction pipe 32 between the first transverse plate bodies 371 of the second guide plate 37 and the third guide plate 37 is S1. The total cross-sectional area of ​​the outlet end of the second suction pipe 32 is S2, and S1=S2 / (7+1).

[0085] In one embodiment, if Figure 8 As shown, the structures of the three dispersion covers are the same. The first dispersion cover 34 is specifically described as an example. The first side wall 341 of the first dispersion cover 34 extends in a vertical direction toward the first air inlet pipe 31. The side of the first dispersion cover 34 facing away from the first air inlet pipe 31 includes a second side wall 342 and a third side wall 343. The second side wall 342 constitutes a side wall with a pointed top, and the second side wall 342 extends downwardly in a direction away from the first air inlet pipe 31. The top of the third side wall 343 is connected to the second side wall 342, and the third side wall 343 extends in a vertical direction. The bottom wall of the first dispersion cover 34 extends in a horizontal direction. In this solution, the second side wall 342 is set in an inclined shape to further reduce or avoid dust accumulation on the top wall inside the dispersion cover.

[0086] In one specific implementation, the fluid simulation software fluent is used for simulation calculation. Figures 2 to 7 As shown, the structure of the bag filter 100 is as follows:

[0087] The bag filter 100 includes six ash hoppers 1, six filter chambers 2 and a suction assembly 3. The six ash hoppers 1 are sequentially distributed along the second horizontal direction b. Each filter chamber 2 is provided with 15 filter bags. The six filter chambers 2 are sequentially distributed along the second horizontal direction b and are arranged one by one above the ash hoppers 1. The six ash hoppers 1 are arranged in pairs to form three ash hopper groups. The suction assembly 3 includes a first suction pipe 31, a second suction pipe 32 and a third suction pipe 33 arranged side by side in the first horizontal direction a. The outlet end of the first suction pipe 31 is connected to a first dispersion cover 34, the outlet end of the second suction pipe 32 is connected to a second dispersion cover 35, and the outlet end of the third suction pipe 33 is connected to a third dispersion cover 36. The openings of the second dispersion cover 35 are respectively opposite to the two ash hoppers 1 of the first ash hopper group, the openings of the first dispersion cover 34 are respectively opposite to the two ash hoppers 1 of the second ash hopper group, and the openings of the third dispersion cover 36 are respectively opposite to the two ash hoppers 1 of the third ash hopper group. The first dispersion cover 34, the second dispersion cover 35 and the third dispersion cover 36 are all pointed structures and have the same structure and size. The first dispersion cover 34 is taken as an example for specific description. Figure 8 and Fig. 9 As shown, the angle γ of the top of the first dispersion cover 34 is 83°, the height H1 of the first dispersion cover 34 is 550 mm, the height H2 of the top is 450 mm, the length L1 of the bottom wall of the first dispersion cover 34 is 1580 mm, the width W1 of the bottom wall of the first dispersion cover 34 is 800 mm, and the difference ΔL between the length of the top wall of the top and the length of the bottom wall of the top is 100 mm. The length of the second suction pipe 32 is less than the length of the first suction pipe 31 and less than the length of the third suction pipe 33, and the second dispersion cover 35, the first dispersion cover 34 and the third dispersion cover 36 are spaced apart and distributed along the second horizontal direction b.

[0088] The first air suction pipe 31 includes a first inlet straight pipe 311, a first curved pipe section 312, a first straight pipe section 313 and a second curved pipe section 314 which are connected in sequence, the second air suction pipe 32 includes a second inlet straight pipe 321, a third curved pipe section 322 and a second straight pipe section 323 which are connected in sequence, and the third air suction pipe 33 includes a third inlet straight pipe 331, a fourth curved pipe section 332, a third straight pipe section 333 and a fifth curved pipe section 334 which are connected in sequence. The first curved pipe section 312, the third curved pipe section 322 and the fourth curved pipe section 332 are arranged side by side, the first curved pipe section 312 is bent downward in a direction away from the third curved pipe section 322, the third curved pipe section 322 is bent downward, the fourth curved pipe section 332 and the first curved pipe section 312 are arranged symmetrically with respect to the vertical plane where the central axis of the first inlet straight pipe 311 is located, and the bending angles of the fourth curved pipe section 332 and the first curved pipe section 312 are not easy to be too large, so as to avoid causing the volume of the air suction component 3 to be too large, and it is only necessary to meet the setting positions of the adjacent air inlet pipes without interfering with each other. The first inlet straight pipe 311 and the first straight pipe section 313 extend respectively along the second horizontal direction b, and the second curved pipe section 314 is used to connect the first straight pipe section 313 with the first dispersion cover 34. The axes of the second inlet straight pipe 321, the third curved pipe section 322 and the second straight pipe section 323 are in the same vertical plane. The second inlet straight pipe 321 and the second straight pipe section 323 extend along the second horizontal direction b respectively, and the second straight pipe section 323 is connected to the second dispersion cover 35. The third inlet straight pipe 331 and the third straight pipe section 333 extend along the second horizontal direction b respectively, and the fifth curved pipe section 334 is used to connect the third straight pipe section 333 and the third dispersion cover 36. The air suction assembly 3 of this solution has a compact structure and simple airflow distribution, and can be applied to the bag dust collector 100 with limited space.

[0089] The inner diameter of the first suction pipe 31, the second suction pipe 32 and the third suction pipe 33 is R1=390mm, the bending radius of the first bend pipe section 312 and the fourth bend pipe section 332 is R2=195mm, the bending radius of the third bend pipe section 322 is R3=100mm, and the bending radius of the second bend pipe section 314 and the fifth bend pipe section 334 is R4=205mm. When looking down at the suction assembly 3, the maximum angle α between the first bend pipe section 312 and the fourth bend pipe section 332 and the first suction pipe 31 is 39.12°. When looking directly at the suction assembly 3 from the inlet end of the suction pipe, the angle β between the first bend pipe section 312 and the fourth bend pipe section 332 and the first suction pipe 31 is 28°.

[0090] The guide plate 37 includes a first transverse plate body 371, a vertical plate body 372 and a second transverse plate body 373 which are connected in sequence. The first transverse plate body 371 is located above the second transverse plate body 373. The width of the first transverse plate body 371 and the width of the second transverse plate body 373 extend along the second horizontal direction b respectively. The vertical plate body 372 extends along the vertical direction. The width of the first transverse plate body 371 is 50 mm, the height of the vertical plate body 372 is 250 mm, and the width of the second transverse plate body 373 is 30 mm.

[0091] In the second dispersion hood 35, the number of guide plates 37 is three, wherein two guide plates 37 are located above the first ash hopper 1, and the remaining guide plate 37 is located above the second ash hopper 1. In the first dispersion hood 34, the number of guide plates 37 is three, wherein two guide plates 37 are located above the third ash hopper 1, and the remaining guide plate 37 is located above the fourth ash hopper 1. In the third dispersion hood 36, the number of guide plates 37 is three, wherein two guide plates 37 are located above the fifth ash hopper 1, and the remaining guide plate 37 is located above the sixth ash hopper 1. In each dispersion hood, the height difference between the first transverse plate bodies 371 of two adjacent guide plates 37 is ΔH, and the cross-sectional area of ​​the outlet end of the corresponding suction pipe corresponding to the corresponding height difference ΔH is S1, and the total cross-sectional area of ​​the outlet end of the suction pipe is S2, S1=S2 / (n+1), and n is the number of guide plates in the dispersion hood.

[0092] The fluid simulation software fluent is used for simulation calculation, and the results are as follows:

[0093] (1) Fig.10 It represents the velocity distribution cloud diagram of the middle section of the bag dust collector. It can be seen from the figure that the positions of the three dispersion hoods and the airflow dispersion effect indicate that the bag dust collector 100 of this embodiment has good uniformity of longitudinal ash load and transverse ash load, and there is no abnormal vortex flow and flow velocity area.

[0094] (2) Fig.11 The velocity vector diagram of the bag filter 100 shows that the resistance of each section of the pipeline is balanced, the air flow speeds of the three suction pipes and the three dispersion hoods are balanced, and the pollution is sucked evenly.

[0095] (3) Fig.12 The velocity distribution cloud diagram of the cross section 100 mm below the filter chamber 2 shows that the maximum velocity value is 7 m / s, which meets the filtering working conditions.

[0096] (4) Fig.13 The cloud diagram representing the air flow velocity shows that the bag filter 100 of this embodiment has good uniformity of longitudinal ash load and transverse ash load.

[0097] It should be understood that the above embodiments are exemplary and are not intended to include all possible implementations included in the claims. Various modifications and changes may be made on the basis of the above embodiments without departing from the scope of the present disclosure. Similarly, the various technical features of the above embodiments may be arbitrarily combined to form other embodiments of the present invention that may not be explicitly described. Therefore, the above embodiments only express several implementations of the present invention and do not limit the scope of protection of the patent of the present invention.

Claims

1. A bag dust collector for a railway track bed sewage suction vehicle, characterized in that: The bag filter (100) comprises: A plurality of ash hoppers (1) for collecting waste; A plurality of filter chambers (2) for filtering dust-laden airflow; An air suction component (3) is located between the plurality of ash hoppers (1) and the plurality of filter chambers (2); the air suction component (3) comprises a plurality of dispersion hoods and a plurality of air suction pipes arranged side by side along a first horizontal direction (a), the outlet end of each air suction pipe is respectively connected to a dispersion hood, and the opening of the dispersion hood faces downward; The plurality of ash hoppers (1) are divided into a plurality of ash hopper groups along the airflow direction, each of the ash hopper groups comprising at least two adjacent ash hoppers (1); each ash hopper group is matched with at least one dispersion cover, and the inlet of each ash hopper (1) in the ash hopper group is respectively opposite to the opening of the corresponding dispersion cover; A plurality of guide plates (37) are provided in the dispersion hood. The guide plates (37) are arranged vertically. The guide plates (37) are spaced apart and distributed along the airflow direction. The arrangement heights of the guide plates (37) are successively increased along the airflow direction. The guide plates (37) are used to reduce the speed of the airflow entering the dispersion hood and make it dispersed and uniform before flowing downward.

2. The bag dust collector for railway roadbed sewage suction vehicle according to claim 1, characterized in that: The plurality of ash hoppers (1) are distributed in sequence along the second horizontal direction (b), and the plurality of filter chambers (2) are distributed in sequence along the second horizontal direction (b) and are arranged above the ash hoppers (1) in a one-to-one correspondence.

3. The bag dust collector for railway roadbed sewage suction vehicle according to claim 2, characterized in that: All the dispersion covers are spaced apart and distributed along the second horizontal direction (b); And / or, the second horizontal direction (b) is perpendicular to the first horizontal direction (a).

4. The bag dust collector for railway track bed sewage suction vehicle according to claim 1, characterized in that: The longitudinal section of the top of the dispersion cover is in an inverted V shape.

5. The bag dust collector for railway track bed sewage suction vehicle according to claim 2, characterized in that: The air suction assembly (3) comprises a first air suction pipe (31), a second air suction pipe (32) and a third air suction pipe (33) arranged side by side in a first horizontal direction (a); the outlet end of the first air suction pipe (31) is connected to a first dispersion cover (34), the outlet end of the second air suction pipe (32) is connected to a second dispersion cover (35), and the outlet end of the third air suction pipe (33) is connected to a third dispersion cover (36); The length of the second air suction pipe (32) is less than the length of the first air suction pipe (31) and less than the length of the third air suction pipe (33); the second dispersion cover (35), the first dispersion cover (34) and the third dispersion cover (36) are spaced apart and distributed along the second horizontal direction (b).

6. The bag dust collector for railway track bed sewage suction vehicle according to claim 5, characterized in that: The number of the ash hoppers (1) and the number of the filter chambers (2) are both six, and the six ash hoppers (1) are divided into a first ash hopper group, a second ash hopper group and a third ash hopper group along the airflow direction, and each ash hopper group includes two ash hoppers (1); The openings of the first dispersion cover (34) are respectively opposite to the two ash hoppers (1) of the first ash hopper group, the openings of the second dispersion cover (35) are respectively opposite to the two ash hoppers (1) of the second ash hopper group, and the openings of the third dispersion cover (36) are respectively opposite to the two ash hoppers (1) of the third ash hopper group.

7. The bag dust collector for railway track bed sewage suction vehicle according to claim 6, characterized in that: The first air suction pipe (31) comprises a first inlet straight pipe (311), a first curved pipe section (312), a first straight pipe section (313) and a second curved pipe section (314) which are connected in sequence; the second air suction pipe (32) comprises a second inlet straight pipe (321), a third curved pipe section (322) and a second straight pipe section (323) which are connected in sequence; the third air suction pipe (33) comprises a third inlet straight pipe (331), a fourth curved pipe section (332), a third straight pipe section (333) and a fifth curved pipe section (334) which are connected in sequence; The first curved pipe section (312), the third curved pipe section (322) and the fourth curved pipe section (332) are arranged side by side, the first curved pipe section (312) is bent downward in a direction away from the third curved pipe section (322), the third curved pipe section (322) is bent downward, and the fourth curved pipe section (332) is symmetrically arranged with the first curved pipe section (312) about a vertical plane where the central axis of the first inlet straight pipe (311) is located; The first inlet straight pipe (311) and the first straight pipe section (313) extend respectively along the second horizontal direction (b), and the second curved pipe section (314) is used to connect the first straight pipe section (313) with the first dispersion cover (34); the axes of the second inlet straight pipe (321), the third curved pipe section (322) and the second straight pipe section (323) are in the same vertical plane, the second inlet straight pipe (321) and the second straight pipe section (323) extend respectively along the second horizontal direction (b), and the second straight pipe section (323) is connected with the second dispersion cover (35); the third inlet straight pipe (331) and the third straight pipe section (333) extend respectively along the second horizontal direction (b), and the fifth curved pipe section (334) is used to connect the third straight pipe section (333) with the third dispersion cover (36).

8. The bag dust collector for railway roadbed sewage suction vehicle according to claim 7, characterized in that: The inner diameters of the first air suction pipe (31), the second air suction pipe (32) and the third air suction pipe (33) are equal, and the inner diameter R1 is ≤ 450 mm; The bending radii of the first curved pipe section (312) and the fourth curved pipe section (332) are equal, and 175mm≤curving radius R2≤215mm; the bending radius of the third curved pipe section (322) is R3, and 90mm≤curving radius R3≤110mm; the bending radii of the second curved pipe section (314) and the fifth curved pipe section (334) are equal, and 185mm≤curving radius R4≤225mm.

9. The bag dust collector for railway roadbed sewage suction vehicle according to any one of claims 1 to 8, characterized in that: The guide plate (37) comprises a first transverse plate body (371), a vertical plate body (372) and a second transverse plate body (373) which are connected in sequence, wherein the first transverse plate body (371), the vertical plate body (372) and the second transverse plate body (373) together form a concave cavity (374), and an opening of the concave cavity (374) is opposite to an outlet end of the corresponding suction pipe.

10. The bag dust collector for railway track bed sewage suction vehicle according to claim 9, characterized in that: The outlet end of the air suction pipe extends along the second horizontal direction (b); the first transverse plate (371) is located above the second transverse plate (373); the width of the first transverse plate (371) and the width of the second transverse plate (373) extend along the second horizontal direction (b) respectively; the vertical plate (372) extends along the vertical direction; the width of the first transverse plate (371) is greater than the width of the second transverse plate (373); the second horizontal direction (b) is perpendicular to the first horizontal direction (a); And / or, in the same dispersion hood, the height difference between the top walls of two adjacent guide plates (37) is ΔH, the cross-sectional area of ​​the outlet end of the suction pipe corresponding to the corresponding height difference ΔH is S1, and the total cross-sectional area of ​​the outlet end of the suction pipe is S2, S1=S2 / (n+1), wherein n is the number of guide plates in the dispersion hood.

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