Dedusting settling bin for sand treatment for casting

Abstract

The utility model discloses a casting sand treatment dedusting settling bin, belongs to the technical field of dedusting equipment, and provides a casting sand treatment bin with higher dedusting settling efficiency, which comprises a dedusting bin body, the dedusting bin body is provided with a main bin body with open upper and lower ends, the upper end of the main bin body is fixedly connected with an upper sealing cover, and the lower end of the main bin body is provided with a conical part with an open bottom; the inner wall of the main bin body is fixedly connected with a wind shield, the wind shield is fixedly connected between the inner walls of one pair of opposite side walls of the main bin body and makes close contact with the upper sealing cover, the other pair of opposite side walls of the main bin body is provided with an air inlet end and an air exhaust end respectively, and the inner wall of the conical part is fixedly connected with an intercepting plate which is parallel to the wind shield. According to the scheme, the air baffle structure is arranged, the air flow direction changing mode is used for increasing the circulation path of air flow, meanwhile, the movement direction of dust in the air flow is changed, the weight of the dust and the downward movement direction are used for improving the sedimentation efficiency of sand, and according to the scheme, the higher the air flow speed is, the better the sedimentation and dust removal effects are.

Description

Technical Field

[0001] The present application relates to the technical field of dust removal equipment, and in particular to a dust removal sedimentation bin for foundry sand processing. Background Art

[0002] Sand treatment is mainly for sand casting process, and it is mainly used for the treatment and regeneration of old casting sand to achieve a step of recycling. Through sand treatment equipment, the old casting sand is separated, screened, cooled and other processes to reach the level of reuse; other sand treatment equipment is sent to the molding station after a certain proportion of ingredients and mixing, so as to realize the online uninterrupted recycling of casting sand. Simply put, the sand treatment system is mainly divided into old sand treatment system, ingredient system, sand mixing system and sand supply system. In each system, dust removal is a necessary auxiliary process in each process, so as to reduce the ash content of sand in the sand treatment process to achieve better molding conditions.

[0003] However, it is difficult to adjust the zero point of the dust removal air volume in existing dust collectors. Too much air volume will cause sand to enter the dust collector during the dust removal process, resulting in an increase in the loss on ignition, thereby increasing costs; too little air volume will lead to an increase in the ash content of the sand, affecting the modeling quality. Summary of the invention

[0004] The purpose of the present application is to provide a foundry sand processing bin with higher dust removal and sedimentation efficiency.

[0005] In order to achieve the above objectives, the present application provides a dust removal and sedimentation bin for casting sand processing: it includes a dust removal bin body, the dust removal bin body has a main bin body with open upper and lower ends, the upper end of the main bin body is fixedly connected with an upper cover, and the lower end has a cone with an open bottom, the inner wall of the main bin body is fixedly connected with a wind shield, the wind shield is fixedly connected between the inner walls of an opposite side wall of the main bin body and is in close contact with the upper cover, the other pair of opposite side walls of the main bin body are respectively provided with an air inlet end and an air exhaust end, the inner wall of the cone is fixedly connected with an intercepting plate, the intercepting plate is parallel to the wind shield, and the lower open end of the cone is provided with a dust collecting box, which is convenient for cleaning the dust inside the sedimentation bin.

[0006] As a preferred embodiment, the wind shield is located between the air inlet end and the air outlet end, so that the arc through which the airflow passes is larger.

[0007] As a preferred embodiment, the air inlet end and the air outlet end are coaxial and have the same inner and outer diameters, so that the resistance of the air inlet and the air outlet are equivalent.

[0008] As a preference, the lower edge of the wind shield is lower than the lowest point of the inner wall of the air inlet end and the air outlet end, so as to fully intercept and change the direction of the airflow.

[0009] As a preference, the lower edge of the wind shield is flush with the lowest points of the outer walls of the air inlet end and the air outlet end, so as to facilitate positioning when fixing the wind shield.

[0010] As a preference, there are several interception plates, each of which allows air to pass through but does not allow dust to pass through. The upper edge of the interception plate is flush with the transition surface between the main compartment body and the cone portion, which also provides an installation position for the interception plate.

[0011] Preferably, the lower end of the cone has an inner lining, and the inner wall of the dust box is provided with an insertion groove extending to the upper end surface, suitable for being inserted into the inner lining and limited by a locking pin to prevent the dust box from falling off due to excessive wind pressure.

[0012] Preferably, the locking pin comprises a pin rod, one end of the pin rod has a limiting ring, the end of the limiting ring facing away from the pin rod is fixedly connected with a hook, the lining is provided with an inner pin hole passing through the inner and outer walls on one opposite side wall, the dust box is provided with an outer pin hole passing through the outer side surface and the inner wall of the insertion groove on one opposite side wall, and the pin rod is suitable for passing through the outer pin hole and the inner pin hole to form a limiting structure.

[0013] Compared with the prior art, the beneficial effects of this application are:

[0014] (1) By setting up a windshield structure, the wind direction is changed to increase the flow path of the airflow, and the movement direction of the dust in the airflow is changed at the same time. The weight of the dust itself and the downward movement direction are used to improve the sedimentation efficiency of the sand. The lower the flow rate of the traditional dust removal bin, the better the sedimentation effect. However, the greater the airflow rate of the solution of the present application, the better the sedimentation and dust removal effect;

[0015] (2) By setting an interception plate in the cone of the sedimentation bin to reduce the speed of the downward airflow and slow down the dust falling, the dust removal rate can be further improved, thereby improving the sand recovery efficiency and ash removal rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the foundry sand treatment dust removal sedimentation bin;

[0017] Figure 2 A three-dimensional structural cross-sectional view of the silo body of the foundry sand treatment dust removal sedimentation silo;

[0018] Figure 3 A plan cross-sectional view of a silo body of the foundry sand treatment dust removal sedimentation silo;

[0019] Figure 4 A three-dimensional structural cross-sectional view of a dust collecting box of the foundry sand treatment dust removal sedimentation bin;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the locking pin of the dust removal sedimentation bin for casting sand treatment.

[0021] In the figure: 1. upper cover; 2. dust removal bin body; 201. main bin body; 202. cone; 203. air inlet end; 204. air outlet end; 205. wind shield; 206. interception plate; 207. lining; 208. inner pin hole; 3. dust collection box; 301. insertion slot; 302. outer pin hole; 4. locking pin; 401. pin rod; 402. limit ring; 403. hook. DETAILED DESCRIPTION

[0022] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0024] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0025] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0026] like Figure 1-5The shown casting sand treatment dust collection and sedimentation bin comprises a dust collection bin body 2, the interior of which is the main place for dust collection and sedimentation. The dust collection bin body 2 has a main bin body 201 with open upper and lower ends. Usually, the main bin body 201 is a cube, and the transition of the side wall is rounded, which has a higher pressure bearing capacity and better air flow uniformity than a cylindrical structure. The upper end of the main bin body 201 is fixedly connected with an upper cover 1, which is a sheet metal separated from the main bin body 201 and is used to cover the upper end surface of the dust collection bin body 2 that cannot be integrally formed. The upper cover 1 is an important component to ensure the internal sealing of the dust collection bin body 2. The inner wall of the main bin body 201 is fixedly connected with a windshield 205 , which is used to change the flow direction of the overall airflow when it passes through the sedimentation bin. The wind shield 205 is fixedly connected between the inner walls of an opposite side wall of the main bin body 201, and is generally fixed by welding. There is no gap between the wind shield 205 and the inner wall of the main bin body 201. The wind shield 205 is also in close contact with the bottom surface of the upper cover 1. Usually, in order to avoid the airflow flowing over the top of the wind shield 205, welding is also required to reduce the gap. In this way, the sand will only pass through a certain lower arc path as the gas flow direction changes. In this process, its own movement trajectory will be changed. When passing under the baffle, it will fall to the bottom of the sedimentation bin due to the influence of gravity and downward speed, thereby increasing the sedimentation efficiency of the sand.

[0027] The other pair of opposite side walls of the main bin body 201 are respectively provided with an air inlet end 203 and an air outlet end 204, which are obviously protruding from the outer surface of the main bin body 201 and are used to connect with an external air duct, so as to realize the communication between the duct and the inside of the dust removal bin body 2. The air inlet end 203 and the air outlet end 204 are coaxial and have the same inner and outer diameters. The air flow conveying capacity of the two is the same. The wind shield 205 is usually located in the middle of the air inlet end 203 and the air outlet end 204, so that the air inlet resistance and the air outlet resistance are large. On the other hand, the lower edge of the wind shield 205 is lower than the lowest point of the inner wall of the air inlet end 203 and the air outlet end 204. For the convenience of positioning, the lower edge of the wind shield 205 is usually kept flush with the lowest point of the outer wall of the air inlet end 203 and the air outlet end 204, that is, the height of the wind shield 205 just covers the two externally connected air vents to avoid the two air vents facing each other. When the airflow is small, the airflow direction cannot be significantly changed.

[0028] The lower end of the main compartment body 201 also has a cone 202 with an open bottom. The cone 202 is a quadrangular pyramid. The inner wall of the cone 202 is fixedly connected with an interception plate 206, which can further reduce the air flow rate. The interception plate 206 is parallel to the wind shield 205, but the bottom of the wind shield 205 is significantly higher than the top surface of the interception plate 206. There are several interception plates 206, generally three are sufficient. These interception plates 206 allow air to pass through, but do not allow dust to pass through. In order to achieve this function, many through-hole structures are opened on the interception plate 206, and a filter with a very small diameter is fixed in the through-hole. The upper edge of the interception plate 206 is flush with the transition surface between the main compartment body 201 and the cone 202, and the wind shield 205 is significantly higher than the transition surface.

[0029] The lower open end of the cone 202 is sleeved with a dust box 3, and dust will slide into the dust box 3 through the funnel-shaped inner wall of the cone 202. In order to facilitate the installation of the dust box 3, the lower end of the cone 202 is provided with an inner lining 207. The cross-section of the inner lining 207 is similar to the cross-section of the lower end of the cone 202, but the wall thickness is a little thinner. The inner wall of the dust box 3 is provided with an insertion groove 301 extending to the upper end surface, which is just inserted into the inner lining 207, but this insertion is usually not an interference fit, so it is also necessary to be limited by a lock pin 4. The specific structure of the lock pin 4 includes a pin rod 401. Correspondingly, the inner lining 207 is provided with an inner pin hole 208 that passes through the inner and outer walls on one opposite side wall. The dust box 3 is provided with an outer pin hole 302 on one opposite side wall, which passes through the outer side surface and the inner wall of the insertion groove 301. After the dust box 3 is fitted with the inner liner 207, the outer pin hole 302 will be aligned with the inner pin hole 208. At this time, the pin rod 401 can pass through the outer pin hole 302 and the inner pin hole 208 to achieve limiting. One end of the pin rod 401 is also provided with a limiting ring 402. The diameter of the limiting ring 402 is significantly larger than the pin rod 401, which is used for the insertion depth of the current pin rod 401. The end of the limiting ring 402 facing away from the pin rod 401 is fixedly connected with a hook 403 as an exposed force point, which is convenient for pulling out the locking pin 4 in the inserted state, thereby releasing the limiting state of the dust box 3.

[0030] Working principle: The airflow that needs to be dusted passes through the air inlet end 203 and enters the main bin body 201. Under the blocking effect of the wind shield 205, the wind direction is changed downward, and the dust in the airflow will also dive downward. Under the further deceleration effect of the interception plate 206, the speed of the dust is reduced, and it will slide down close to the side of the interception plate 206 and the inner wall of the cone 202 until it falls into the dust collecting box 3. The cleaner airflow will pass through the interception plate 206 and the gap between the interception plate 206 and the wind shield 205, and be discharged from the exhaust end 204 after making a circular arc. After working for a period of time, pull out the locking pin 4, remove the dust collecting box 3, and pour out the dust at the bottom of the sedimentation bin, so it is more convenient to clean the dust collection sedimentation bin.

[0031] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A dust removal sedimentation bin for foundry sand treatment, characterized in that: The invention comprises a dust removal bin body (2), wherein the dust removal bin body (2) has a main bin body (201) with open upper and lower ends, the upper end of the main bin body (201) is fixedly connected to an upper cover (1), and the lower end has a cone (202) with an open bottom, the inner wall of the main bin body (201) is fixedly connected to a windshield (205), the windshield (205) is fixedly connected between the inner walls of an opposite side wall of the main bin body (201), and is in close contact with the upper cover (1), the other pair of opposite side walls of the main bin body (201) are respectively provided with an air inlet end (203) and an air outlet end (204), the inner wall of the cone (202) is fixedly connected to an intercepting plate (206), the intercepting plate (206) is parallel to the windshield (205), and the lower open end of the cone (202) is sleeved with a dust collecting box (3).

2. The foundry sand treatment dust removal sedimentation bin according to claim 1, characterized in that: The wind shield (205) is located between the air inlet end (203) and the air outlet end (204).

3. The foundry sand treatment dust removal sedimentation bin according to claim 2, characterized in that: The air inlet end (203) and the air outlet end (204) are coaxial and have the same inner and outer diameters.

4. The foundry sand treatment dust removal sedimentation bin according to claim 3, characterized in that: The lower edge of the wind shield (205) is lower than the lowest point of the inner wall of the air inlet end (203) and the air outlet end (204).

5. The foundry sand treatment dust removal sedimentation bin according to claim 4, characterized in that: The lower edge of the wind shield (205) is flush with the lowest points of the outer walls of the air inlet end (203) and the air outlet end (204).

6. The foundry sand treatment dust removal sedimentation bin according to any one of claims 1 to 5, characterized in that: There are a plurality of intercepting plates (206), each of which allows air to pass through but does not allow dust to pass through, and the upper edge of the intercepting plate (206) is flush with the transition surface between the main compartment body (201) and the cone (202).

7. The foundry sand treatment dust removal sedimentation bin according to claim 6, characterized in that: The lower end of the cone (202) is provided with an inner lining (207), and the inner wall of the dust collecting box (3) is provided with an insertion groove (301) extending to the upper end surface, which is suitable for being inserted into the inner lining (207) and is limited by a locking pin (4).

8. The foundry sand treatment dust removal sedimentation bin according to claim 7, characterized in that: The locking pin (4) comprises a pin rod (401), one end of the pin rod (401) is provided with a limiting ring (402), the end of the limiting ring (402) facing away from the pin rod (401) is fixedly connected with a hook (403), the lining (207) is provided with an inner pin hole (208) penetrating the inner and outer walls on one opposite side wall, the dust box (3) is provided with an outer pin hole (302) penetrating the outer side surface and the inner wall of the insertion groove (301) on one opposite side wall, and the pin rod (401) is suitable for passing through the outer pin hole (302) and the inner pin hole (208).

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