Waste sand recycling and selection device for counterweight casting production

Abstract

The invention discloses a device for recycling and selecting waste sand from counterweight block casting production, and relates to the technical field of counterweight block casting. The device comprises a bracket, a material injection funnel, an auxiliary mechanism, a mounting frame, a screening mechanism and a conveyor belt, wherein the upper side of the bracket is fixedly connected with the material injection funnel, and the bracket is fixedly connected with the mounting frame below the material injection funnel, the screening mechanism is installed on the mounting frame, the auxiliary mechanism is installed in the material injection funnel, and the positions of the material discharge port of the material injection funnel and the screening mechanism cooperate with each other, and a conveyor belt is installed below the bracket; the second driving motor of the device can drive the driving wheel to work, and then drive the first movable rod to rotate on the screening frame, and protrusions are arranged on both sides of the first movable rod, and the screening frame is vibrated by swinging the protrusions, and the waste sand will pass through the pores of the screen, and smaller particles can pass through the screen and be discharged through the material discharge port, while larger particles are retained above the screen and screened out by a waste discharge plate, thereby improving the utilization rate and treatment efficiency of the waste sand.

Description

Technical Field

[0001] The invention relates to the technical field of counterweight block casting, in particular to a device for recycling and selecting waste sand produced in counterweight block casting. Background Art

[0002] At present, the use of foundry sand in the foundry industry is very large, and the reuse rate of old sand is low. The annual discharge of foundry waste sand in my country is more than 10 million tons. Due to improper treatment technology, it not only pollutes the environment, but also causes a lot of waste of resources;

[0003] Waste sand generated in the casting process is a valuable resource, but it is often treated as waste traditionally. With the increasing requirements for environmental protection and resource recycling, the development of an efficient and economical waste sand recycling device has become an urgent need;

[0004] There are some problems with traditional waste sand recycling devices. For example, incomplete screening will lead to the inability to effectively process and utilize the waste sand, which will affect the normal operation of the production line. In addition, the waste sand may be unevenly distributed during the screening process. The accumulation of waste sand will cause failures in the screening process and reduce the utilization rate of the waste sand. In addition, when pre-treating the waste sand, the waste sand contains untreated large particles or impurities that may affect the utilization of the waste sand. Based on this, the present invention provides a waste sand recycling and selection device for counterweight block casting production to solve the problems raised in the above background technology. Summary of the invention

[0005] The technical problem to be solved by the present invention is: incomplete screening will lead to the inability to effectively process and utilize waste sand, which will in turn affect the normal operation of the production line, and the waste sand may be unevenly distributed during the screening process. The accumulation of waste sand will cause failures in the screening process and reduce the utilization rate of waste sand. In addition, when pre-treating the waste sand, the waste sand contains untreated large particles or impurities, which may affect the utilization of the waste sand.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a device for recycling and selecting waste sand in counterweight casting production, which includes a bracket, a material injection funnel, an auxiliary mechanism, a mounting frame, a screening mechanism and a conveyor belt, wherein the upper side of the bracket is fixedly connected with the material injection funnel, and the bracket is fixedly connected with the mounting frame below the material injection funnel, the screening mechanism is installed on the mounting frame, the auxiliary mechanism is installed in the material injection funnel, and the positions of the material discharge port of the material injection funnel and the screening mechanism are matched with each other, and a conveyor belt is installed below the bracket;

[0007] The auxiliary mechanism includes a crushing frame, a rotating shaft, a crushing push plate, a driving rod, a cam, a crushing groove, a buffer frame, a buffer spring assembly, a buffer rod and a first driving motor. The crushing frame is fixedly connected to the injection funnel, and a rotating shaft is embedded in the crushing frame. The crushing frame is movably connected to the crushing push plate through the rotating shaft, and a crushing groove is provided between the crushing push plate and the crushing frame.

[0008] As a preferred solution of the waste sand recycling and selection device for counterweight casting production of the present invention, one side of the crushing frame is fixedly connected with a first driving motor, the first driving motor passes through the crushing frame and is fixedly connected with a driving rod, a cam is fixedly connected to the driving rod, and the cam cooperates with the surface of the crushing push plate, one side of the crushing frame is fixedly connected with a buffer frame, a buffer rod is movably connected under the crushing push plate, and a buffer spring assembly is arranged on the side of the buffer rod away from the crushing push plate through the buffer frame. .

[0009] As a preferred solution of the device for recycling and selecting waste sand from counterweight block casting production described in the present invention, a telescopic cylinder is fixedly connected to one side below the injection funnel, a baffle is fixedly connected to the output end of the telescopic cylinder, and the injection funnel is movably connected to a baffle at the discharge port.

[0010] As a preferred solution of the device for recycling and selecting waste sand from counterweight casting production described in the present invention, the screening mechanism includes a screening frame, a screen, a second driving motor, a mounting seat, a spring, a driving wheel, a first synchronous belt, a driven wheel, a first synchronous wheel, a second synchronous wheel, a second synchronous belt, a first movable rod, an adjustment frame, an eccentric wheel, an adjustment block, a slide groove, a sliding block, a leveling block, a protrusion and a waste discharge plate, the mounting frame is fixedly connected to the screening frame, the mounting frame is symmetrically provided with mounting seats, and connecting members are provided on both sides of the screening frame close to the mounting seats, a spring is provided between the connecting member and the mounting seat, the upper side of the screening frame is fixedly connected to a mounting plate, the mounting plate is fixedly connected to the second driving motor, and the output end of the second driving motor is fixedly connected to the driving wheel.

[0011] As a preferred solution of the device for recycling and selecting waste sand from counterweight block casting production described in the present invention, the first movable rod is movably connected to the middle of the screening frame, and protrusions are fixedly connected to the screening frame on both sides of the first movable rod, one side of the protrusion is fixedly connected to a driven wheel, the driven wheel and the driving wheel are movably connected through a first synchronous belt, and a second movable rod is movably connected to one side of the screening frame, and a first synchronous wheel and a second synchronous wheel are respectively provided on one side of the first movable rod and the second movable rod.

[0012] As a preferred solution of the device for recycling and selecting waste sand from counterweight block casting production described in the present invention, the first synchronous wheel and the second synchronous wheel are movably connected by a second synchronous belt, and an adjusting frame is fixedly connected to the side of the screening frame away from the first synchronous wheel, a slide groove is provided on the upper surface of the adjusting frame, a sliding block is slidably connected to the slide groove, an adjusting block is fixedly connected to the side of the sliding block away from the slide groove, a leveling block is fixedly connected to one side of the adjusting block, and a plurality of pads are arranged at equal distances below the leveling block.

[0013] As a preferred solution of the device for recycling and selecting waste sand from counterweight block casting production described in the present invention, the second movable rod is fixedly connected to an eccentric wheel on the side away from the second synchronous wheel, grooves are provided on both side surfaces of the eccentric wheel, and the middle part of the adjustment block is located on the eccentric wheel.

[0014] As a preferred solution of the device for recycling and selecting waste sand from counterweight block casting production described in the present invention, a screen is fixedly connected inside the screening frame, the screen cooperates with the bottom of the leveling block, and a sealing cover is fixedly connected to one side of the screening frame close to the first synchronous wheel and the second synchronous wheel and the adjusting frame respectively, and a waste discharge plate is fixedly connected to one side of the screening frame.

[0015] As a preferred solution of the device for recycling and selecting waste sand from counterweight block casting production described in the present invention, the first drive motor, the second drive motor and the telescopic cylinder are all electrically connected to an external power supply and an external single-chip microcomputer, and the model of the external single-chip microcomputer is: STM32.

[0016] Beneficial effects of the present invention:

[0017] 1. When it is necessary to process the waste sand produced in the counterweight casting production, first pour the waste sand into the injection funnel, the injection funnel guides the waste sand into the crushing tank, and works by controlling the first drive motor. The rotation of the first drive motor will drive the drive rod to rotate, and a cam is fixedly connected to the drive rod. The protruding block of the cam is in full contact with the surface of the crushing push plate, driving the crushing push plate to swing back and forth along the rotating shaft, so that the waste sand in the crushing tank is repeatedly crushed, thereby improving the grinding efficiency of the waste sand and the utilization rate of the waste sand. The baffle under the injection funnel is controlled by a telescopic cylinder, and the baffle can control the amount of waste sand in the injection funnel to discharge, so as to avoid a large area falling into the screening mechanism below, affecting the screening effect, and can effectively process the waste sand produced in the counterweight casting production and improve the efficiency of resource utilization.

[0018] 2. When the waste sand after multiple treatments falls onto the screen of the screening rack through the discharge port, the second driving motor is controlled to work, and the second driving motor can drive the active wheel to work, and the active wheel and the driven wheel are connected to each other through the first synchronous belt, thereby driving the first movable rod to rotate on the screening rack, and protrusions are arranged on both sides of the first movable rod, and a spring is arranged between the connecting piece and the mounting seat of the screening rack. The screening rack is vibrated by swinging the protrusions, and the waste sand is more fully screened and separated on the screen. The waste sand will pass through the pores of the screen, and smaller particles can pass through the screen and be discharged through the discharge port, while larger particles cannot pass through the screen and are retained above the screen. The larger particles are screened out by the waste discharge plate. Through continuous vibration and screening process, particles of different particle sizes of the waste sand will be gradually separated, so that effective screening and separation operations of the waste sand can be realized, and the utilization rate and treatment efficiency of the waste sand can be improved.

[0019] 3. When the first movable rod rotates, the first movable rod drives the first synchronous wheel to rotate, and the first synchronous wheel and the second synchronous wheel are movably connected through the second synchronous belt, thereby driving the second movable rod to rotate, and an eccentric wheel is fixedly connected to one side of the second movable rod. When the eccentric wheel rotates, the adjustment block is affected by the eccentric wheel and drives the sliding block to move horizontally in the slide groove, and a leveling block is fixedly connected to one side of the adjustment block. The pad of the leveling block cooperates with the surface of the screen to spread the waste sand on the screen onto the screen. The waste sand can be effectively screened through the screen and can be fully processed and separated during the screening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present disclosure.

[0021] Figure 2 It is a structural schematic diagram of the auxiliary mechanism in the embodiment of the present disclosure.

[0022] Figure 3 Schematic diagram of the internal structure of the auxiliary mechanism in the embodiment of the present disclosure.

[0023] Figure 4 It is a schematic diagram of the structure of the screening mechanism in the embodiment of the present disclosure.

[0024] Figure 5 It is a schematic diagram of the structure of the screening rack in the embodiment of the present disclosure.

[0025] Figure 6 It is a schematic diagram of the cooperation between the driving wheel and the driven wheel in the screening mechanism in the embodiment of the present disclosure.

[0026] Figure 7 It is a schematic diagram of the cooperation between the eccentric wheel and the adjustment block in the screening mechanism in the embodiment of the present disclosure.

[0027] Figure 8 It is a three-dimensional side view of an embodiment of the present disclosure.

[0028] Fig. 9 for Figure 8 A is a partial enlarged schematic diagram of the middle part.

[0029] Reference numerals: 1, bracket; 2, injection funnel; 3, auxiliary mechanism; 301, crushing frame; 302, rotating shaft; 303, crushing push plate; 304, driving rod; 305, cam; 306, crushing groove; 307, buffer frame; 308, buffer spring assembly; 309, buffer rod; 310, first driving motor; 4, mounting frame; 5, screening mechanism; 501, screening frame; 502, screen; 503, second driving motor; 504, mounting seat; 505, spring; 506, driving wheel; 507, first synchronous belt; 508, driven wheel; 509, first synchronous wheel; 510, second synchronous wheel; 511, second synchronous belt; 512, first movable rod; 513, adjusting frame; 514, eccentric wheel; 515, adjusting block; 516, slide groove; 517, sliding block; 518, leveling block; 519, protrusion; 520, waste discharge plate; 521, connecting piece; 522, mounting plate; 523, second movable rod; 524, sealing cover; 6, conveyor belt; 7, baffle; 8, telescopic cylinder. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings. Example 1

[0031] Reference Figure 1 , Figure 2 , Figure 3 and Fig. 9 This embodiment provides a device for recycling and selecting waste sand from counterweight casting production, including a bracket 1, a material injection funnel 2, an auxiliary mechanism 3, a mounting frame 4, a screening mechanism 5 and a conveyor belt 6. The upper side of the bracket 1 is fixedly connected to the material injection funnel 2, and the bracket 1 is fixedly connected to the mounting frame 4 below the material injection funnel 2. The screening mechanism 5 is installed on the mounting frame 4. The auxiliary mechanism 3 is installed in the material injection funnel 2, and the positions of the discharge port of the material injection funnel 2 and the screening mechanism 5 are matched with each other. A conveyor belt 6 is installed below the bracket 1;

[0032] A telescopic cylinder 8 is fixedly connected to one side below the injection funnel 2, a baffle 7 is fixedly connected to the output end of the telescopic cylinder 8, and the injection funnel 2 is movably connected to the baffle 7 at the discharge port;

[0033] In this embodiment, specifically, the auxiliary mechanism 3 includes a crushing frame 301, a rotating shaft 302, a crushing push plate 303, a driving rod 304, a cam 305, a crushing groove 306, a buffer frame 307, a buffer spring assembly 308, a buffer rod 309 and a first driving motor 310. The crushing frame 301 is fixedly connected to the injection funnel 2, and the crushing frame 301 is embedded with a rotating shaft 302. The crushing frame 301 is movably connected to the crushing push plate 303 through the rotating shaft 302, and a crushing groove 306 is provided between the crushing push plate 303 and the crushing frame 301.

[0034] A first driving motor 310 is fixedly connected to one side of the crushing frame 301, and the first driving motor 310 passes through the crushing frame 301 and is fixedly connected to a driving rod 304, and a cam 305 is fixedly connected to the driving rod 304, and the cam 305 cooperates with the surface of the crushing push plate 303, and a buffer frame 307 is fixedly connected to one side of the crushing frame 301, and a buffer rod 309 is movably connected below the crushing push plate 303, and a buffer spring assembly 308 is provided on the side of the buffer rod 309 away from the crushing push plate 303 and passes through the buffer frame 307;

[0035] When it is necessary to process the waste sand produced in the counterweight casting production, the waste sand is first poured into the injection funnel 2, and the injection funnel 2 guides the waste sand into the crushing groove 306. By controlling the first drive motor 310 to work, the rotation of the first drive motor 310 will drive the drive rod 304 to rotate, and the drive rod 304 is fixedly connected with a cam 305. The protruding block of the cam 305 is in full contact with the surface of the crushing push plate 303, driving the crushing push plate 303 to swing back and forth along the rotating shaft 302, so that the waste sand in the crushing groove 306 is repeatedly crushed, thereby improving the grinding efficiency of the waste sand and improving the utilization rate of the waste sand. The baffle 7 below the injection funnel 2 is controlled by the telescopic cylinder 8. The baffle 7 can control the amount of waste sand in the injection funnel 2 to discharge, so as to avoid a large area falling into the screening mechanism 5 below, which affects the screening effect. The waste sand produced in the counterweight casting production can be effectively processed and the resource utilization efficiency is improved. Example 2

[0036] Reference Figure 4~Figure 8This embodiment is based on the previous embodiment, and is different from the previous embodiment in that the screening mechanism 5 includes a screening frame 501, a screen 502, a second driving motor 503, a mounting seat 504, a spring 505, a driving wheel 506, a first synchronous belt 507, a driven wheel 508, a first synchronous wheel 509, a second synchronous wheel 510, a second synchronous belt 511, a first movable rod 512, an adjustment frame 513, an eccentric wheel 514, an adjustment block 515, a slide 516, a sliding block 517, and a leveling block 518. , a protrusion 519 and a waste discharge plate 520, the screening frame 501 is fixedly connected to the mounting frame 4, mounting seats 504 are symmetrically arranged on the mounting frame 4, and connecting members 521 are arranged on both sides of the screening frame 501 close to the mounting seats 504, and springs 505 are arranged between the connecting members 521 and the mounting seats 504, a mounting plate 522 is fixedly connected to the upper side of the screening frame 501, a second driving motor 503 is fixedly connected to the mounting plate 522, and a driving wheel 506 is fixedly connected to the output end of the second driving motor 503;

[0037] The screening frame 501 is movably connected to a first movable rod 512 in the middle, and protrusions 519 are fixedly connected to the screening frame 501 on both sides of the first movable rod 512, and a driven wheel 508 is fixedly connected to the protrusion 519 on one side, and the driven wheel 508 is movably connected to the driving wheel 506 through a first synchronous belt 507, and a second movable rod 523 is movably connected to one side of the screening frame 501, and a first synchronous wheel 509 and a second synchronous wheel 510 are respectively provided on one side of the first movable rod 512 and the second movable rod 523;

[0038] The first synchronous wheel 509 and the second synchronous wheel 510 are movably connected via a second synchronous belt 511, and an adjusting frame 513 is fixedly connected to the side of the screening frame 501 away from the first synchronous wheel 509, a slide groove 516 is provided on the upper surface of the adjusting frame 513, a sliding block 517 is slidably connected to the slide groove 516, an adjusting block 515 is fixedly connected to the side of the sliding block 517 away from the slide groove 516, a leveling block 518 is fixedly connected to one side of the adjusting block 515, and a plurality of pads are arranged at equal distances below the leveling block 518;

[0039] The side of the second movable rod 523 away from the second synchronous wheel 510 is fixedly connected to an eccentric wheel 514, and grooves are provided on both sides of the eccentric wheel 514, and the middle of the adjustment block 515 is located on the eccentric wheel 514;

[0040] The screening frame 501 is fixedly connected with a screen 502, and the screen 502 cooperates with the lower part of the leveling block 518. The screening frame 501 is fixedly connected with a sealing cover 524 on one side close to the first synchronous wheel 509 and the second synchronous wheel 510 and the adjusting frame 513, and a waste discharge plate 520 is fixedly connected to one side of the screening frame 501.

[0041] When the waste sand after multiple treatments falls onto the screen 502 of the screening rack 501 through the discharge port, the second driving motor 503 is controlled to work, and the second driving motor 503 can drive the driving wheel 506 to work, and the driving wheel 506 and the driven wheel 508 are connected to each other through the first synchronous belt 507, thereby driving the first movable rod 512 to rotate on the screening rack 501, and the first movable rod 512 is provided with protrusions 519 on both sides, and a spring 505 is provided between the connecting piece 521 of the screening rack 501 and the mounting seat 504, through The protrusion 519 swings the screening frame 501 to vibrate, and the waste sand is screened and separated more fully on the screen 502. The waste sand passes through the pores of the screen 502, and smaller particles can pass through the screen 502 and be discharged through the discharge port, while larger particles cannot pass through the screen and are retained above the screen 502. The larger particles are screened out by the waste discharge plate 520. Through the continuous vibration and screening process, particles of different particle sizes of the waste sand are gradually separated, which can achieve effective screening and separation operations on the waste sand, and improve the utilization rate and treatment efficiency of the waste sand.

[0042] At the same time, when the first movable rod 512 rotates, the first movable rod 512 drives the first synchronous wheel 509 to rotate, and the first synchronous wheel 509 is movably connected to the second synchronous wheel 510 through the second synchronous belt 511, thereby driving the second movable rod 522 to rotate, and the second movable rod 522 is fixedly connected to an eccentric wheel 514 on one side. When the eccentric wheel 514 rotates, the adjustment block 515 is affected by the eccentric wheel 514 and drives the sliding block 517 to move horizontally in the slide groove 516, and the adjustment block 515 is fixedly connected to one side of the adjustment block 515. The pad of the leveling block 518 cooperates with the surface of the screen 502 to spread the waste sand on the screen 502 onto the screen 502, and the waste sand can be effectively screened through the screen and can be fully processed and separated during the screening process.

Claims

1. A device for recycling and selecting waste sand from counterweight casting production, characterized by: The invention comprises a support (1), a material injection funnel (2), an auxiliary mechanism (3), a mounting frame (4), a screening mechanism (5) and a conveyor belt (6), wherein the support (1) is fixedly connected to the upper side of the material injection funnel (2), and the support (1) is fixedly connected to the mounting frame (4) below the material injection funnel (2), the screening mechanism (5) is mounted on the mounting frame (4), the auxiliary mechanism (3) is mounted inside the material injection funnel (2), and the positions of the material discharge port of the material injection funnel (2) and the screening mechanism (5) are matched with each other, and a conveyor belt (6) is mounted below the support (1); The auxiliary mechanism (3) comprises a crushing frame (301), a rotating shaft (302), a crushing push plate (303), a driving rod (304), a cam (305), a crushing groove (306), a buffer frame (307), a buffer spring assembly (308), a buffer rod (309) and a first driving motor (310); the crushing frame (301) is fixedly connected to the injection funnel (2); the crushing frame (301) is embedded with a rotating shaft (302); the crushing frame (301) is movably connected to the crushing push plate (303) via the rotating shaft (302); and a crushing groove (306) is provided between the crushing push plate (303) and the crushing frame (301); The crushing frame (301) is fixedly connected to a first drive motor (310) on one side, the first drive motor (310) passes through the crushing frame (301) and is fixedly connected to a drive rod (304), a cam (305) is fixedly connected to the drive rod (304), and the cam (305) and the surface of the crushing push plate (303) cooperate with each other, a buffer frame (307) is fixedly connected to one side of the crushing frame (301), a buffer rod (309) is movably connected below the crushing push plate (303), and a buffer spring assembly (308) is provided on the side of the buffer rod (309) away from the crushing push plate (303) and passes through the buffer frame (307); The screening mechanism (5) comprises a screening frame (501), a screen (502), a second driving motor (503), a mounting seat (504), a spring (505), a driving wheel (506), a first synchronous belt (507), a driven wheel (508), a first synchronous wheel (509), a second synchronous wheel (510), a second synchronous belt (511), a first movable rod (512), an adjustment frame (513), an eccentric wheel (514), an adjustment block (515), a chute (516), a sliding block (517), a leveling block (518), a protrusion (519) and a waste discharge plate ( 520), a screening frame (501) is fixedly connected to the mounting frame (4), mounting seats (504) are symmetrically arranged on the mounting frame (4), and connecting members (521) are arranged on both sides of the screening frame (501) close to the mounting seats (504), a spring (505) is arranged between the connecting member (521) and the mounting seat (504), a mounting plate (522) is fixedly connected to the upper side of the screening frame (501), a second drive motor (503) is fixedly connected to the mounting plate (522), and a driving wheel (506) is fixedly connected to the output end of the second drive motor (503); The screening frame (501) is movably connected to a first movable rod (512) in the middle, and protrusions (519) are fixedly connected to the two sides of the first movable rod (512) passing through the screening frame (501), and one side of the protrusion (519) is fixedly connected to a driven wheel (508), and the driven wheel (508) is movably connected to the driving wheel (506) via a first synchronous belt (507), and one side of the screening frame (501) is movably connected to a second movable rod (523), and one side of the first movable rod (512) and the second movable rod (523) are respectively provided with a first synchronous wheel (509) and a second synchronous wheel (510); The first synchronous wheel (509) and the second synchronous wheel (510) are movably connected via a second synchronous belt (511), and an adjusting frame (513) is fixedly connected to a side of the screening frame (501) away from the first synchronous wheel (509), a sliding groove (516) is provided on the upper surface of the adjusting frame (513), a sliding block (517) is slidably connected to the sliding groove (516), an adjusting block (515) is fixedly connected to a side of the sliding block (517) away from the sliding groove (516), a leveling block (518) is fixedly connected to one side of the adjusting block (515), and a plurality of pads are arranged at equal distances below the leveling block (518); An eccentric wheel (514) is fixedly connected to the side of the second movable rod (523) away from the second synchronous wheel (510), grooves are provided on both sides of the surface of the eccentric wheel (514), and the middle part of the adjustment block (515) is located on the eccentric wheel (514); A screen (502) is fixedly connected inside the screening frame (501), the screen (502) cooperates with the lower part of the leveling block (518), and a sealing cover (524) is fixedly connected to one side of the screening frame (501) close to the first synchronous wheel (509) and the second synchronous wheel (510) and the adjustment frame (513), and a waste discharge plate (520) is fixedly connected to one side of the screening frame (501); A telescopic cylinder (8) is fixedly connected to one side below the injection funnel (2), a baffle (7) is fixedly connected to the output end of the telescopic cylinder (8), and the injection funnel (2) is movably connected to the baffle (7) at the discharge port; The first drive motor (310), the second drive motor (503) and the telescopic cylinder (8) are all electrically connected to an external power supply and an external single-chip microcomputer, and the model of the external single-chip microcomputer is STM32.

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