CN213739558U - Sand leakage device for trolley type annealing furnace - Google Patents

Abstract

The utility model provides a sand leakage device for a trolley type annealing furnace, which belongs to the technical field of cast tube annealing treatment, and comprises a chute, a filtering mechanism, an iron absorption kit and a collector, wherein the chute is placed on a trolley and is used for receiving sand and residual iron sheets leaked from a pipe body, and the sand and the residual iron sheets falling onto the chute slide to the side edge of the trolley by means of the chute; the filtering mechanism is arranged on one side of the trolley and is used for receiving and filtering sand and residual iron sheets which slide off the chute, and the iron absorbing sleeve is arranged in the filtering mechanism and is used for absorbing the residual iron sheets filtered by the filtering mechanism; the collector is arranged on the side part of the filtering mechanism and is used for collecting the sand filtered by the filtering mechanism. The utility model provides a sand leaking device for car-type annealing stove has and recycles the material recovery, saves the amount of hand labor greatly, can not cause the extravagant technological effect of material.

Description

Sand leakage device for trolley type annealing furnace

Technical Field

The utility model belongs to the technical field of cast tube annealing treatment, more specifically say, relate to a sand leaking device for car-type annealing stove.

Background

After the ductile cast iron pipe produced by the hot die method is centrifugally formed, the ductile cast iron pipe needs to be subjected to annealing treatment in an annealing furnace, and as the sand core cannot be effectively eliminated in the process of a centrifugal machine, a certain amount of sand grains and residual iron pieces are contained in the cast ductile cast iron pipe, and along with the rotation of the pipe body in the annealing process, the crushed sand and the residual iron pieces in the pipe body can continuously move towards the socket and the socket respectively to form accumulation, and finally the crushed sand and the residual iron pieces fall onto a trolley, so that workers need to clean the crushed sand and the residual iron pieces every time. If the clearance is untimely, the grit is piled up in too much will falling into the flotation pulley of annealing stove lower part, and the flotation pulley seal appears in the body outer wall very easily, influences appearance quality, can lead to the flotation pulley irrotational under the severe conditions, causes the body to crouch the stove in the annealing stove, and the body irrotational under high temperature can constantly become the ellipse under the dead weight, and this kind of condition is especially more obvious under the big pipe diameter annealing condition, causes follow-up processing time longer, seriously influences production.

In order to avoid the influence caused by the accumulation of the sand and the residual iron pieces on the trolley, the sand and the residual iron pieces on the trolley need to be cleaned frequently, the current cleaning mode is that a rake is used manually to scrape and rake the sand and the residual iron pieces on the ground, and then the sand and the residual iron pieces are loaded into a small trolley by a shovel and are transported away; because the annealing temperature is high, the temperature of the sand and the residual iron sheet is increased, the influence of high temperature is required to be endured when the sand is raked and scraped and the residual iron sheet is cleaned manually, and the labor operation intensity is high; in addition, for the mixture of the sand and the residual iron pieces placed in the small cart, the mixture is directly thrown away without being recycled, so that the waste of materials is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sand leakage device for car-type annealing stove, operation intensity of labour is big when aiming at solving the clearance of grit and incomplete iron sheet on the platform truck, causes the extravagant technical problem of material.

In order to achieve the above object, the utility model adopts the following technical scheme: the chute is placed on the trolley and used for receiving sand and residual iron pieces leaked from a pipe body, and the sand and the residual iron pieces falling onto the chute slide down to the side edge of the trolley by means of the chute; the filtering mechanism is arranged on one side of the trolley and is used for receiving and filtering sand and residual iron sheets which slide off the chute; the iron attracting external member is arranged in the filtering mechanism and is used for attracting the residual iron sheets filtered by the filtering mechanism; the collector is arranged on the side part of the filtering mechanism and used for collecting the sand filtered by the filtering mechanism.

As another embodiment of the application, the filtering mechanism comprises a box body and a first filtering plate, wherein the box body is arranged obliquely below the chute, the upper end of the box body is open, and the interior of the box body is hollow; the first filter is arranged at the upper end of the box body and covers the opening and is used for filtering sand and residual iron sheets which slide down from the chute, the sand and the residual iron sheets pass through the first filter and then reach the inside of the box body, and the first filter is horizontally arranged and is detachably connected with the side end of the trolley.

As another embodiment of this application, filtering mechanism still includes the second filter, and the second filter is located inside the box for filter the process grit and the scrap iron piece after first filter filters pass the grit of second filter falls extremely bottom half, filter the hole diameter on the second filter and be less than filter the hole diameter on the first filter.

As another embodiment of this application, be equipped with a plurality of discharge gates on the lateral wall of box, the tip of second filter with the box inner wall butt just is located the discharge gate lower extreme, by the grit that the second filter blockked passes through flow out behind the discharge gate the box, discharge gate department sliding connection has and is used for the closing cap the fender lid of discharge gate.

As another embodiment of the present application, the iron attracting kit includes a plurality of first magnets and a plurality of second magnets, the plurality of first magnets are fixedly disposed on the inner wall of the box body and above the second filter plate, and are used for magnetically attracting the residual iron sheets passing through the first filter plate; the second magnets are fixedly arranged on the inner wall of the box body and positioned below the second filter plate and used for magnetically attracting residual iron sheets passing through the second filter plate.

As another embodiment of the application, the collector comprises a first slide rail and a pulley, the first slide rail is transversely arranged outside the box body, and one end of the first slide rail is abutted against the outer wall of the box body; the pulley is connected to the first sliding rail in a sliding mode, and after the pulley is connected with the outer wall of the box body, the pulley is located below the discharge port and used for receiving sand blocked by the second filter plate.

As another embodiment of this application, the box below is equipped with the second slide rail, the vertical a plurality of flexible posts that are equipped with of box bottom, the lower extreme sliding joint of flexible post is in on the second slide rail, the height of box is with the help of a plurality of flexible post is adjusted, the box is accepted the position accessible of the grit of landing and incomplete iron sheet on the chute with the sliding joint of second slide rail is adjusted.

As another embodiment of this application, the upper end of first filter is equipped with the guide plate, transversely be equipped with the ejector member on the box, the top of pushing away of ejector member with the guide plate concreties, the guide plate is used for the water conservancy diversion to follow the grit and the residual iron sheet flow of chute landing are to first filter, the position of guide plate is with the help of the ejector member is adjusted.

As another embodiment of this application, the middle part of second filter is equipped with the arch, by the grit that the second filter stopped rolls towards the discharge gate.

As another embodiment of the application, the height and the inclination of the chute can be adjusted, and both sides of the chute are provided with baffles.

The utility model provides a sand leaking device for car-type annealing stove's beneficial effect lies in: compared with the prior art, the utility model discloses a sand leakage device for car-type annealing stove, place the chute on the platform truck, accept grit and the incomplete iron sheet that leaks and fall from the body, straining device accepts and filters grit and the incomplete iron sheet of landing from the chute, make the magnet external member attract the incomplete iron sheet after the straining device filters, make the collector collect the grit after straining device filters, realize the slip of grit and incomplete iron sheet through the chute, need not artifically remove to hug to scrape, through straining device, the classification of grit and incomplete iron sheet has been realized to the magnet external member is placed, be favorable to retrieving and recycling, operation intensity of labour is big when having solved grit and incomplete iron sheet clearance on the platform truck, cause the extravagant technical problem of material, have to material recovery and recycle, greatly save the artifical amount of labour, can not cause the extravagant technological effect of material.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of a sand leaking device for a car-type annealing furnace according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a sand leaking device for a car-type annealing furnace according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a second filtering plate of the sand leaking device for the car-type annealing furnace according to the embodiment of the present invention;

FIG. 4 is a schematic structural view of another second filtering plate of the sand leaking device for the car-type annealing furnace according to the embodiment of the present invention.

In the figure: 1. a chute;

2. a filtering mechanism; 21. a box body; 22. a first filter plate; 23. a second filter plate; 24. a discharge port; 25. a second slide rail; 26. a telescopic column; 27. a diversion trench; 28. a discharge opening;

3. a magnet kit; 31. a first magnet; 32. a second magnet;

4. a collector; 41. a first slide rail; 42. a pulley;

5. a trolley;

6. a baffle;

7. and pushing the ejecting piece.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 to 4 together, the sand leaking device for the car-type annealing furnace according to the present invention will now be described. The sand leakage device for the trolley type annealing furnace comprises a chute 1, a filtering mechanism 2, an iron absorption kit 3 and a collector 4, wherein the chute 1 is placed on a trolley 5 and used for receiving sand and residual iron pieces leaked from a pipe body, and the sand and the residual iron pieces falling onto the chute 1 slide to the side edge of the trolley 5 by means of the chute 1; the filtering mechanism 2 is arranged on one side of the trolley 5 and is used for receiving and filtering sand and residual iron sheets which slide from the chute 1; the iron attracting external member 3 is arranged inside the filtering mechanism 2 and is used for attracting the residual iron sheets filtered by the filtering mechanism 2; the collector 4 is arranged at the side part of the filtering mechanism 2 and is used for collecting the sand filtered by the filtering mechanism 2.

Compared with the prior art, the utility model provides a sand leaking device for car-type annealing furnace, the utility model is used for the sand leaking device of car-type annealing furnace, place chute 1 on platform truck 5, accept grit and the residual iron sheet that leaks from the body, filtering mechanism 2 accepts and filters the grit and the residual iron sheet that slide from chute 1, make magnet external member 3 attract the residual iron sheet after being filtered by filtering mechanism 2, make collector 4 collect the grit after filtering mechanism 2 filters, realize the slip of grit and residual iron sheet through chute 1, need not artifically remove to hug and scrape, through filtering mechanism 2, magnet external member 3 realize the categorised placement of grit and residual iron sheet, be favorable to the recovery to recycle, the operation intensity of labour is big when having solved grit and residual iron sheet clearance on platform truck 5, cause the extravagant technical problem of material, have to the material recovery recycle, greatly save the amount of manual labor, the technical effect of material waste can not be caused.

The trolley-type annealing furnace is an indispensable annealing device in the cast tube centrifugal processing, and on the annealing furnace was arranged in to the cast tube body, on grit and the incomplete iron piece of following the body both ends whereabouts naturally fell chute 1, through setting up the chute 1 of certain inclination, certain smoothness, after grit and incomplete iron piece arranged chute 1 in, can roll or the landing to the lateral part of platform truck 5 through the effect of natural gravity. The filtering mechanism 2 can receive the sand and the residual iron sheet which slide off the chute 1, and can also perform filtering and screening, block the massive sand and the residual iron sheet, filter the small sand and the residual iron sheet, and perform classified collection and sorting at the later stage. Realized the recovery of material and recycled, not extravagant material through chute 1 roll and direction, need not artifical guard and operation constantly, when the material in chute 1 is many, or when taking place to block up, just need artifical with scraper blade or spade stir the material to filter mechanism 2 this moment on, to a great extent has reduced workman's intensity of labour and amount of labour like this.

The chute 1 is an inclined groove structure, an included angle is formed between the chute 1 and the horizontal plane, sand and residual iron pieces can slide or roll downwards along the groove body under the gravity condition, and the inclination angle of the chute 1 is adjustable, namely the included angle between the chute 1 and the horizontal plane is adjustable.

The materials in the specification refer to sand and residual iron pieces, and if the 'sand' is separately indicated, the sand is; if the 'residual iron sheet' is indicated separately, the residual iron sheet is determined.

As a specific embodiment of the sand leaking device for the car-type annealing furnace provided by the present invention, please refer to fig. 1 to 4, the filtering mechanism 2 includes a box body 21 and a first filtering plate 22, the box body 21 is disposed at the oblique lower side of the chute 1, the upper end is open, and the interior is hollow; first filter 22 locates box 21 upper end and closing cap opening for filter grit and the iron scrap piece of landing from chute 1, grit and iron scrap piece pass behind first filter 22 to box 21 inside, first filter 22 level set up and can dismantle with 5 sides of platform truck and be connected.

Preferably, the first filter plate 22 is detachably connected with the upper end of the box body 21 and is also detachably connected with the side edge of the trolley 5, so that the first filter plate 22 can just receive materials falling from the chute 1, and when the height of the box body 21 cannot meet the requirement of receiving the materials, the first filter plate 22 is directly connected with the trolley 5, so that a gap or a certain distance is formed between the first filter plate 22 and the box body 21; when the height of the box body 21 is higher, or exceeds the height of the trolley 5 or the height of materials on the receiving chute 1, the box body 21 is set to be adjustable in height, or the height of the chute 1 is lifted, finally the height of the box body 21 is lower than the height of the chute 1, and the materials on the chute 1 can smoothly fall onto the first filter plate 22.

Specifically, when the residual iron sheet is bulky, the residual iron sheet can be blocked at the upper end of the first filter plate 22 when exceeding the filter holes of the first filter plate 22, and the residual iron sheet can be taken out by a tool which is manually available at the moment. Typically, sand will pass through the first screen 22.

As a specific implementation manner of the sand leaking device for the car-type annealing furnace, please refer to fig. 1 to 4, the filtering mechanism 2 further comprises a second filtering plate 23, the second filtering plate 23 is disposed inside the box 21 and used for filtering sand and residual iron pieces after being filtered by the first filtering plate 22, the sand passing through the second filtering plate 23 falls to the bottom of the box 21, and the filtering hole diameter on the second filtering plate 23 is smaller than the filtering hole diameter on the first filtering plate 22. The principle of second filter 23 is the same with the principle of first filter 22, and second filter 23 is exactly the secondary filter to the material, filters the screening with grit and scrap iron piece, and the grit can fall to the bottom of box 21 through second filter 23, and the scrap iron piece of less volume can be blocked by second filter 23, or on the scrap iron piece can attract to inhale magnet external member 3, the manual work was taken out the scrap iron piece with the instrument can. Meanwhile, the sand with larger volume is blocked by the second filter plate 23, the sand is taken out by a manual tool, and the sand and the residual iron pieces are placed in a classified mode after the sand is taken out.

Specifically, the box body 21 is in a cubic structure or a cylindrical structure, the shapes of the first filter plate 22 and the second filter plate 23 are matched with the shape of the box body 21, and when the box body 21 is in a cubic shape, the first filter plate 22 and the second filter plate 23 are both in a rectangular structure; when the case 21 has a cylindrical shape, the first filter plate 22 and the second filter plate 23 are each a circular plate-shaped structure.

As a specific implementation manner of the sand leaking device for the car-type annealing furnace, please refer to fig. 1 to 4, a plurality of discharge ports 24 are provided on the side wall of the box 21, the end of the second filter 23 abuts against the inner wall of the box 21 and is located at the lower end of the discharge port 24, sand blocked by the second filter 23 flows out of the box 21 after passing through the discharge port 24, and the discharge port 24 is slidably connected with the blocking cover for covering the discharge port 24. The sand stopped by the second filter plate 23 will slide out through the outlet 24 into the collector 4, and in general, the sand will pass through the second filter plate 23, and it is noted that the residual iron pieces which are not attracted by the magnet assembly 3 will remain on the second filter plate 23, and it is also possible to output from the outlet 24, and most of the residual iron pieces will be adhered to the magnet assembly 3. When the residual iron sheet on the second filter plate 23 will not automatically slide to the discharge port 24, it needs to be manually cleaned and taken out.

The blocking cover is connected with the discharge port 24 in a sliding mode, the discharge port 24 can be covered through sliding, the discharge port 24 can be opened through reverse sliding, and the blocking cover can be understood to be a plug-type connecting structure.

As a specific embodiment of the sand leaking device for the car-type annealing furnace according to the present invention, please refer to fig. 1 to 4, the magnet kit 3 includes a plurality of first magnets 31 and second magnets 32, and the plurality of first magnets 31 are fixedly disposed on the inner wall of the box 21 and above the second filter plate 23 for magnetically attracting the residual iron sheets passing through the first filter plate 22; the second magnets 32 are fixed on the inner wall of the box 21 and below the second filter plate 23, and are used for magnetically attracting the residual iron sheets passing through the second filter plate 23. The large-volume residual iron sheet is blocked by the first filter plate 22, the small-volume residual iron sheet is attracted by the first magnet 31 or blocked by the second filter plate 23, and the small-volume residual iron sheet is attracted by the second magnet 32 through the second filter plate 23, in short, the residual iron sheet falling from the chute 1 can have four places: first on the first filter plate 22, second on the first magnet 31, third on the second filter plate 23, and fourth on the second magnet 32; because the iron absorption kit 3 does not absorb the sand, the screening and the filtering between the sand and the residual iron sheets are realized, the sand is finally placed in a classification way and can be recycled, and the waste of materials is avoided.

Specifically, the first magnet 31 and the second magnet 32 are both strong magnets, and can generate strong magnetic force to attract the residual iron pieces.

As a specific embodiment of the sand leaking device for the car-type annealing furnace provided by the present invention, please refer to fig. 1 to 4, the collector 4 comprises a first slide rail 41 and a pulley 42, the first slide rail 41 is transversely disposed outside the box body 21, and one end of the first slide rail is abutted against the outer wall of the box body 21; the pulley 42 is slidably connected to the first slide rail 41, and after the pulley 42 contacts with the outer wall of the box 21, the pulley 42 is located below the discharge port 24 and is used for receiving sand blocked by the second filter plate 23. Carriage 42 is provided with a compartment open at the upper end thereof for receiving sand falling from discharge port 24.

In this embodiment, the collectors 4 are multiple sets, and are all disposed on the periphery of the box 21, and each set of collectors 4 corresponds to one discharge port 24.

As a specific implementation manner of the sand leaking device for the car-type annealing furnace, please refer to fig. 1 to 4, the lower side of the box 21 is provided with a second slide rail 25, the bottom end of the box 21 is vertically provided with a plurality of telescopic columns 26, the lower ends of the telescopic columns 26 are slidably connected to the second slide rail 25, the height of the box 21 is adjusted by means of the plurality of telescopic columns 26, and the box 21 receives the position accessible of the sand and the residual iron sheet of the sliding on the chute 1 and is adjusted by sliding connection with the second slide rail 25. The arrangement direction of the second slide rail 25 is the same as that of the first slide rail 41, and the box body 21 can slide on the second slide rail 25 along the width direction of the trolley 5 when the position of the chute 1 or the position where the material falls cannot correspond to the filtering mechanism 2, and the corresponding position of the chute 1 is adjusted, so that the filtering mechanism 2 can be completely butted or receive the material falling from the chute 1. When the height of the box body 21 can not meet the requirement, the height of the box body 21 can be adjusted by adjusting the telescopic length of the telescopic column 26.

Specifically, the telescopic column 26 is an electric telescopic column 26, and includes a plurality of sections of column bodies connected end to end, and a sliding block is arranged at the lower end of the telescopic column 26 and is connected to the second slide rail 25 in a sliding manner.

As a specific embodiment of the sand leaking device for the car-type annealing furnace, please refer to fig. 1 to 4, the upper end of the first filter plate 22 is provided with the guide plate 6, the box 21 is transversely provided with the ejector 7, the ejector 7 is fixedly connected with the guide plate 6 at the top end, the guide plate 6 is used for guiding the sand and the residual iron sheet which slip from the chute 1 to flow to the first filter plate 22, and the position of the guide plate 6 is adjusted by means of the ejector 7. The guide plate 6 is a plurality of, and the slope sets up, and has an contained angle between the horizontal plane, and in the homoenergetic direction material got into filtering mechanism 2, the guide plate 6 was adjustable in the ascending position of horizontal direction, just can realize adjusting through the flexible length of adjusting ejection piece 7.

Specifically, ejector 7 is electric putter or electrodynamic type telescopic link, just can realize the effect of adjusting the water conservancy diversion position of guide plate 6 through operation ejector 7.

As a specific embodiment of the sand leaking device for the car-type annealing furnace according to the present invention, please refer to fig. 1 to 4, the middle portion of the second filter 23 is provided with a protrusion, and the sand blocked by the second filter 23 rolls down toward the discharge port 24. The height of the middle part of the second filter plate 23 is higher, and the materials on the second filter plate 23 can slide or roll around the second filter plate 23 by means of natural gravity, so that the materials can flow to the discharge hole 24.

As a specific embodiment of the sand leaking device for the car-type annealing furnace provided by the present invention, please refer to fig. 1 to 4, the height and the inclination of the chute 1 can be adjusted, and both side edges of the chute 1 are provided with the baffle. The bottom end of the chute 1 is provided with a lifting platform, the lifting platform adopts a telescopic lifting platform structure in the prior art, and the height of the chute 1 can be adjusted through the lifting platform; the inclination of chute 1 is the contained angle between chute 1 and the horizontal plane, because chute 1 is on the elevating platform through the leg joint, through adopting the support of different inclinations, fills up the lower extreme of putting at chute 1, just can realize adjusting the effect of chute 1's inclination.

Specifically, a guide groove 27 is also formed in an inner upper portion of the case 21, and the sand and the residual iron pieces falling from the first filter plates 22 can be guided to the second filter plates 23 through the guide groove 27.

In this embodiment, a discharge opening 28 is provided in the bottom of the box 21, and sand in the box 21 can be discharged through the discharge opening 28.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A sand leaking device for a car-type annealing furnace, comprising:

the chute is placed on the trolley and used for receiving sand and residual iron pieces leaked from the pipe body, and the sand and the residual iron pieces falling onto the chute slide to the side edge of the trolley by means of the chute;

the filtering mechanism is arranged on one side of the trolley and is used for receiving and filtering sand and residual iron sheets which slide off the chute;

the iron attracting external member is arranged in the filtering mechanism and is used for attracting the residual iron sheets filtered by the filtering mechanism; and

and the collector is arranged on the side part of the filtering mechanism and is used for collecting the sand filtered by the filtering mechanism.

2. The sand leaking device for the cart-type annealing furnace according to claim 1, wherein the filtering mechanism comprises:

the box body is arranged below the chute in an inclined manner, the upper end of the box body is opened, and the interior of the box body is hollow; and

the first filter is arranged at the upper end of the box body and covers the opening and is used for filtering sand and residual iron sheets which slide down from the chute, the sand and the residual iron sheets pass through the first filter and then reach the inside of the box body, and the first filter is horizontally arranged and is detachably connected with the side end of the trolley.

3. The sand leaking device for a cart-type annealing furnace according to claim 2, wherein the filtering mechanism further comprises:

the second filter is arranged in the box body and used for filtering sand and residual iron sheets filtered by the first filter, the sand passing through the second filter falls to the bottom of the box body, and the diameter of the filter holes in the second filter is smaller than that of the filter holes in the first filter.

4. The sand leaking device for the car-type annealing furnace according to claim 3, wherein a plurality of discharge ports are provided on the side wall of the box body, the end portion of the second filter plate abuts against the inner wall of the box body and is located at the lower end of the discharge port, the sand stopped by the second filter plate flows out of the box body after passing through the discharge port, and a stopper for covering the discharge port is slidably attached to the discharge port.

5. The sand leaking device for the cart-type annealing furnace according to claim 3, wherein the magnet kit comprises:

the first magnets are fixedly arranged on the inner wall of the box body and positioned above the second filter plate and are used for magnetically attracting the residual iron sheets passing through the first filter plate; and

and the second magnets are fixedly arranged on the inner wall of the box body and positioned below the second filter plate and used for magnetically attracting the residual iron sheets passing through the second filter plate.

6. The sand leaking device for the cart-type annealing furnace according to claim 4, wherein the collector comprises:

the first sliding rail is transversely arranged on the outer side of the box body, and one end of the first sliding rail is abutted against the outer wall of the box body; and

and the tackle is in sliding contact with the first sliding rail, is positioned below the discharge port after being in contact with the outer wall of the box body and is used for bearing sand blocked by the second filter plate.

7. The sand leaking device for the car-type annealing furnace according to claim 2, wherein a second slide rail is provided below the box body, a plurality of telescopic columns are vertically provided at the bottom end of the box body, the lower ends of the telescopic columns are slidably connected to the second slide rail, the height of the box body is adjusted by means of the plurality of telescopic columns, and the position of the box body for receiving the sand and the residual iron pieces sliding down on the chute can be adjusted by sliding connection with the second slide rail.

8. The sand leaking device for the cart-type annealing furnace according to claim 2, wherein a deflector is provided at an upper end of the first filter plate, a knock-out piece is provided on the box body in a lateral direction, a knock-out end of the knock-out piece is fixed to the deflector, the deflector is used for guiding the sand and the residual iron pieces sliding down from the chute toward the first filter plate, and a position of the deflector is adjusted by means of the knock-out piece.

9. The sand leaking device for the car-type annealing furnace according to claim 4, wherein the second filter plate is provided at the middle portion thereof with a projection, and the sand stopped by the second filter plate rolls down toward the discharging hole.

10. The sand leaking device for the cart-type annealing furnace according to claim 1, wherein the height and the inclination of the chute are adjustable, and both side edges of the chute are provided with the baffle.

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