A heavy metal stability testing device for fly ash from incineration of domestic waste

Abstract

The present invention discloses a device for detecting the heavy metal stability of fly ash from incineration of domestic waste, and relates to the technical field of sampling for heavy metal detection of fly ash from incineration. The device comprises a sampler for preparing test samples in the process of detecting the heavy metal stability of fly ash from incineration of domestic waste. In the process of preparing and sampling the heavy metal stability of fly ash produced after the incineration of domestic waste using a sampler to assist in subsequent detection, the incineration fly ash powder adsorbed on the inner side of the sampling barrel is flushed into the bottom of the sampling barrel through the mutual cooperation of the control component, the auxiliary component, the adjustment component and the rotating component while feeding and sampling, so as to avoid that part of the incineration fly ash powder is not mixed with the test liquid due to adsorption inside the sampling barrel, so as to ensure that the sampling between the incineration fly ash powder and the test liquid meets the expected requirements, and further ensure the accuracy of subsequent detection.

Description

Technical Field

[0001] The invention relates to the technical field of heavy metal detection and sampling of incineration fly ash, in particular to a heavy metal stability detection device for domestic waste incineration fly ash. Background Art

[0002] After the incineration of domestic waste, the fly ash needs to be tested for heavy metal stability in order to achieve the purpose of environmental risk assessment, protect human health, and promote the sustainable development of fly ash treatment and disposal. In the process of heavy metal stability testing of domestic waste incineration fly ash, the powdered fly ash is mixed with the test liquid to prepare the samples needed in the testing process. In the process of sampling and adding the incineration fly ash, since the incineration fly ash is a light powder, the incineration fly ash is prone to rise and adsorb on the inner side wall of the sampling barrel during the process of adding the incineration fly ash, resulting in the failure of some of the adsorbed fly ash to mix with the test liquid during the subsequent test liquid introduction process, resulting in deviations in the subsequent test results. For this reason, we propose a heavy metal stability testing device for domestic waste incineration fly ash. Summary of the invention

[0003] The purpose of the present invention is to provide a device for detecting heavy metal stability of fly ash from the incineration of domestic waste, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: a device for detecting heavy metal stability of fly ash from incineration of domestic waste, comprising a sampler for sampling and preparing test samples in the process of detecting heavy metal stability of fly ash from incineration of domestic waste, a preparation chamber for preparing test samples is provided inside the sampler, a sampling bucket is provided inside the preparation chamber, a positioning groove for assisting the positioning and placement of the sampling bucket is provided inside the preparation chamber, and further comprising:

[0005] A plugging cover is arranged inside the preparation chamber for covering the sampling barrel, a lifting assembly for lifting the plugging cover is arranged inside the preparation chamber, a first feeding assembly and a second feeding assembly are arranged inside the preparation chamber for feeding and preparing materials inside the sampling barrel after the plugging cover and the plugging cover of the sampling barrel are covered, a stirring assembly for stirring during the sampling preparation process is arranged on the plugging cover, and a control assembly for controlling during the feeding process is arranged on the inner side of the plugging cover;

[0006] The control component includes an annular liquid storage cylinder arranged on the inner side of the sealing cover, the upper end of the annular liquid storage cylinder is rotatably connected to an annular plate for sealing the upper end of the annular liquid storage cylinder, the annular plate and the inner wall of the sealing cover are connected and fixed by multiple groups of connecting frames, the upper end of the annular plate is connected and equipped with a delivery pipe for supplying liquid to the inside of the annular liquid storage cylinder, auxiliary components for assisting liquid discharge are arranged around the annular liquid storage cylinder, and multiple groups of auxiliary components are arranged in an annular array around the annular liquid storage cylinder, and a rotating component for rotating the annular liquid storage cylinder is provided on the sealing cover.

[0007] Preferably, the auxiliary component includes two groups of mounting frames fixed on the outside of the annular liquid storage cylinder, a collar is arranged between the two groups of mounting frames, mounting shafts are fixed on both sides of the collar, the two groups of mounting shafts are rotatably connected to the two groups of mounting frames respectively, a liquid outlet pipe is fixed on the inner side of the collar, one end of the liquid outlet pipe is connected to the interior of the annular liquid storage cylinder, the liquid outlet end of the liquid outlet pipe is arranged vertically upward in the initial state, and an adjustment component for adjusting the state of the liquid outlet pipes on each group of auxiliary components is arranged below the annular liquid storage cylinder.

[0008] Preferably, the adjustment assembly includes a driving ring arranged below the annular liquid storage cylinder, a driving assembly for driving the driving ring and a guiding assembly for guiding during the driving process are arranged between the annular liquid storage cylinder and the driving ring, a rack is fixedly mounted on the upper end of the driving ring through an L-shaped frame, a first gear is fixed to one end of the mounting shaft, and the first gear and the rack are meshed with each other.

[0009] Preferably, the driving assembly includes a first threaded rod rotatably connected to the upper end of a driving ring, a first threaded tube is threadedly engaged on the first threaded rod, one end of the first threaded tube is fixed to the lower end of the annular liquid storage cylinder, and a first motor for driving the first threaded rod is installed at the lower end of the driving ring.

[0010] Preferably, the guide assembly includes a first sleeve fixed to the lower end of the annular liquid storage cylinder, a first slide rod is slidably connected to the first sleeve, and one end of the first slide rod is fixed to the driving ring.

[0011] Preferably, the rotating assembly includes a rotating shaft rotatably connected to the inner side of the sealing cover, a second gear is fixed to one end of the rotating shaft, a gear ring is fixed to the outer side of the annular liquid storage cylinder, the second gear and the gear ring are meshed with each other, and a driving motor for driving the rotating shaft is installed at the upper end of the sealing cover.

[0012] Preferably, the first feeding assembly includes a first storage box fixed inside the preparation chamber, the interior of the first storage box contains domestic waste incineration fly ash powder to be tested, a first conveying hose is connected between the first storage box and the sealing cover, and a first solenoid valve for discharging control is installed on the first conveying hose.

[0013] Preferably, the second material supply assembly includes a second storage box fixed inside the preparation chamber, the second storage box contains a test liquid for assisting in the preparation of the test sample, a second delivery hose is connected between the second storage box and the delivery pipe, and a second solenoid valve for discharge control is installed on the second delivery hose.

[0014] Preferably, the stirring assembly includes a stirring shaft rotatably connected to the sealing cover, the annular liquid storage cylinder is sleeved on the outside of the stirring shaft, multiple groups of stirring rods are fixed on the stirring shaft, and the upper end of the sealing cover is equipped with an installation motor for driving the stirring shaft.

[0015] Preferably, the lifting assembly includes a second threaded rod rotatably connected to the inside of the preparation chamber, a second threaded tube is threadedly connected to the second threaded rod, a connecting plate is fixed to one end of the second threaded tube, one end of the connecting plate is fixed to one side of the blocking cover, a second motor for driving the second threaded rod is installed inside the preparation chamber, a second sleeve is fixed to the upper end of the connecting plate, a second slide rod is slidably connected to the second sleeve, and one end of the second slide rod is fixed to the inside of the preparation chamber.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention uses a sampler to prepare samples for the heavy metal stability of fly ash generated after the incineration of domestic waste to assist in subsequent testing. Through the cooperation of the control component, the auxiliary component, the adjustment component and the rotating component, the fly ash powder adsorbed on the inner side of the sampling barrel is flushed into the bottom of the sampling barrel while feeding and sampling, so as to avoid that part of the fly ash powder is not mixed with the test liquid due to adsorption inside the sampling barrel, thereby ensuring that the sampling between the fly ash powder and the test liquid meets the expected requirements, and further ensuring the accuracy of subsequent testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the sampling barrel and the positioning groove structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the internal structure of the preparation chamber of the present invention;

[0021] Figure 4It is a schematic diagram of the structure of the lifting assembly of the present invention;

[0022] Figure 5 It is a schematic structural diagram of the first feeding assembly and the second feeding assembly of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the stirring assembly of the present invention;

[0024] Figure 7 It is a schematic diagram of the structure of the annular liquid storage cylinder of the present invention;

[0025] Figure 8 It is a schematic diagram of the structure of the control component, auxiliary component and adjustment component of the present invention;

[0026] Fig. 9 It is a schematic diagram of the structure of the driving assembly and the guide assembly of the present invention;

[0027] Fig.10 It is a schematic diagram of the state of the liquid outlet pipes on each group of auxiliary components of the present invention after adjustment;

[0028] Fig.11 It is a schematic diagram of the structure of the regulating component of the present invention.

[0029] In the figure: 101, sampler; 102, preparation chamber; 103, sample barrel; 104, positioning groove; 2, plugging cover; 301, second threaded rod; 302, second threaded tube; 303, connecting plate; 304, second motor; 305, second sleeve; 306, second slide bar; 401, first storage box; 402, first delivery hose; 403, first solenoid valve; 501, second storage box; 502, second delivery hose; 503, second solenoid valve; 601, stirring shaft; 602, stirring rod; 603, installation motor; 7 01, annular liquid storage cylinder; 702, annular plate; 703, delivery pipe; 704, connecting frame; 801, mounting frame; 802, mounting shaft; 803, sleeve ring; 804, liquid outlet pipe; 901, driving ring; 902, L-shaped frame; 903, rack; 904, first gear; 1001, first threaded rod; 1002, first threaded tube; 1003, first motor; 1101, first sleeve; 1102, first sliding rod; 1201, rotating shaft; 1202, second gear; 1203, gear ring; 1204, driving motor. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figure 1-Figure 11 The device for detecting heavy metal stability of fly ash from incineration of domestic waste shown in the figure comprises a sampler 101 for sampling and preparing test samples in the process of detecting heavy metal stability of fly ash from incineration of domestic waste, a preparation chamber 102 for preparing test samples is provided inside the sampler 101, a sampling barrel 103 is provided inside the preparation chamber 102, a positioning groove 104 for assisting the positioning and placement of the sampling barrel 103 is provided inside the preparation chamber 102, and further comprises:

[0032] A plugging cover 2 is provided inside the preparation chamber 102 for covering the sampling barrel 103, a lifting assembly for lifting the plugging cover 2 is provided inside the preparation chamber 102, a first feeding assembly and a second feeding assembly are provided inside the preparation chamber 102 for feeding and preparing materials inside the sampling barrel 103 after the plugging cover 2 and the sampling barrel 103 are covered by the plugging cover 2, a stirring assembly for stirring during the sampling preparation process is provided on the plugging cover 2, and a control assembly for controlling during the feeding process is provided on the inner side of the plugging cover 2;

[0033] The control component includes an annular liquid storage cylinder 701 arranged on the inner side of the blocking cover 2, the upper end of the annular liquid storage cylinder 701 is rotatably connected with an annular plate 702 for blocking the upper end of the annular liquid storage cylinder 701, the annular plate 702 is connected and fixed to the inner wall of the blocking cover 2 through multiple groups of connecting frames 704, the upper end of the annular plate 702 is connected with a delivery pipe 703 for supplying liquid to the inside of the annular liquid storage cylinder 701, auxiliary components for assisting liquid discharge are arranged around the annular liquid storage cylinder 701, and multiple groups of auxiliary components are arranged in an annular array around the annular liquid storage cylinder 701, and a rotating component for rotating the annular liquid storage cylinder 701 is arranged on the blocking cover 2;

[0034] It should be noted here that: in the process of using the sampler 101 to prepare samples for the heavy metal stability of the fly ash generated after the incineration of domestic waste to assist in subsequent testing, through the cooperation of the control component, auxiliary component, adjustment component and rotating component, while feeding and sampling, the incineration fly ash powder adsorbed on the inside of the sampling barrel 103 is flushed into the bottom of the sampling barrel 103 to avoid that part of the incineration fly ash powder is not mixed with the test liquid due to adsorption inside the sampling barrel 103, thereby ensuring that the sampling between the incineration fly ash powder and the test liquid meets the expected requirements, further ensuring the accuracy of subsequent testing.

[0035] Preferably, the auxiliary component includes two groups of mounting frames 801 fixed on the outside of the annular liquid storage cylinder 701, a collar 803 is arranged between the two groups of mounting frames 801, mounting shafts 802 are fixed on both sides of the collar 803, and the two groups of mounting shafts 802 are rotatably connected to the two groups of mounting frames 801 respectively, and a liquid outlet pipe 804 is fixed on the inner side of the collar 803, one end of the liquid outlet pipe 804 is connected to the inside of the annular liquid storage cylinder 701, and the liquid outlet end of the liquid outlet pipe 804 is arranged vertically upward in the initial state, and an adjustment component for adjusting the state of the liquid outlet pipe 804 on each group of auxiliary components is arranged below the annular liquid storage cylinder 701;

[0036] It should be noted here that: as the test liquid is transported toward the interior of the annular liquid storage cylinder 701, the test liquid inside the annular liquid storage cylinder 701 is ejected outward through the liquid outlet pipes 804 on each group of auxiliary components through the pressure inside the annular liquid storage cylinder 701. Since the liquid outlet end of the liquid outlet pipe 804 is vertically upward in the initial state, the test liquid ejected from the liquid outlet pipe 804 is rushed into the top of the inner side of the sampling barrel 103 under the action of pressure and finally flows to the bottom of the inner side of the sampling barrel 103.

[0037] Preferably, the adjustment assembly includes a driving ring 901 disposed below the annular liquid storage cylinder 701, a driving assembly for driving the driving ring 901 and a guiding assembly for guiding during the driving process are disposed between the annular liquid storage cylinder 701 and the driving ring 901, a rack 903 is fixedly mounted on the upper end of the driving ring 901 through an L-shaped frame 902, a first gear 904 is fixedly mounted on one end of the mounting shaft 802, and the first gear 904 and the rack 903 are meshed with each other;

[0038] It should be noted here that: the driving ring 901 is moved toward the annular liquid storage cylinder 701 through the driving assembly and the guide assembly. During the movement, the rack 903 is driven to move synchronously through the L-shaped frame 902. During the movement of the rack 903, the rack 903 and the first gear 904 are mutually engaged to drive the mounting shaft 802 and the collar 803 to rotate. During the rotation of the collar 803, the liquid outlet end of the liquid outlet pipe 804 is driven to rotate and adjust from a vertical state to the bottom of the annular liquid storage cylinder 701.

[0039] Preferably, the driving assembly includes a first threaded rod 1001 rotatably connected to the upper end of the driving ring 901, a first threaded tube 1002 is threadedly engaged with the first threaded rod 1001, one end of the first threaded tube 1002 is fixed to the lower end of the annular liquid storage cylinder 701, and a first motor 1003 for driving the first threaded rod 1001 is installed at the lower end of the driving ring 901; the guiding assembly includes a first sleeve 1101 fixed to the lower end of the annular liquid storage cylinder 701, a first slide bar 1102 is slidably connected to the first sleeve 1101, and one end of the first slide bar 1102 is fixed to the driving ring 901;

[0040] It should be noted here that: the first motor 1003 is used to drive the first threaded rod 1001 to rotate. During the rotation of the first threaded rod 1001, the mutual meshing transmission between the first threaded rod 1001 and the first threaded tube 1002 and the sliding guiding effect of the first sleeve 1101 and the first sliding rod 1102 are used to make the driving ring 901, which is subjected to force, perform lifting and lowering movements.

[0041] Preferably, the rotating assembly includes a rotating shaft 1201 rotatably connected to the inner side of the blocking cover 2, a second gear 1202 is fixed to one end of the rotating shaft 1201, a gear ring 1203 is fixed to the outer side of the annular liquid storage cylinder 701, the second gear 1202 and the gear ring 1203 are meshed with each other, and a driving motor 1204 for driving the rotating shaft 1201 is installed at the upper end of the blocking cover 2;

[0042] It should be noted here that: the second gear 1202 at one end of the rotating shaft 1201 is driven to rotate by the driving motor 1204. During the rotation of the second gear 1202, the annular liquid storage cylinder 701 is rotated through the mutual meshing transmission of the second gear 1202 and the ring gear 1203.

[0043] Preferably, the first feeding assembly includes a first storage box 401 fixed inside the preparation chamber 102, the first storage box 401 contains fly ash powder from incineration of domestic waste to be detected, a first delivery hose 402 is connected between the first storage box 401 and the blocking cover 2, and a first solenoid valve 403 for discharging control is installed on the first delivery hose 402;

[0044] It should be noted here that the first solenoid valve 403 is opened to allow part of the incineration fly ash powder in the first storage box 401 to be transported to the interior of the sampling barrel 103 through the first transport hose 402 .

[0045] Preferably, the second material supply assembly includes a second storage box 501 fixed inside the preparation chamber 102, the second storage box 501 contains a test liquid for assisting the preparation of the test sample, the second storage box 501 is connected to the delivery pipe 703 by a second delivery hose 502, and the second delivery hose 502 is installed with a second solenoid valve 503 for material discharge control;

[0046] It should be noted here that: the first solenoid valve 403 is closed and the second solenoid valve 503 is opened, so that part of the test liquid stored in the second storage box 501 is transported to the interior of the annular liquid storage cylinder 701 through the second delivery hose 502 and the delivery pipe 703. As the test liquid is transported toward the interior of the annular liquid storage cylinder 701, the pressure inside the annular liquid storage cylinder 701 causes the test liquid inside the annular liquid storage cylinder 701 to be sprayed out through the liquid outlet pipes 804 on each group of auxiliary components.

[0047] Preferably, the stirring assembly includes a stirring shaft 601 rotatably connected to the blocking cover 2, an annular liquid storage cylinder 701 is sleeved on the outside of the stirring shaft 601, a plurality of stirring rods 602 are fixed on the stirring shaft 601, and a motor 603 for driving the stirring shaft 601 is installed on the upper end of the blocking cover 2;

[0048] It should be noted here that: by installing the motor 603, the stirring shaft 601 is driven to rotate, and during the rotation of the stirring shaft 601, each group of stirring rods 602 is driven to perform stirring operations.

[0049] Preferably, the lifting assembly includes a second threaded rod 301 rotatably connected to the inside of the preparation chamber 102, a second threaded tube 302 is threadedly engaged with the second threaded rod 301, a connecting plate 303 is fixed to one end of the second threaded tube 302, one end of the connecting plate 303 is fixed to one side of the blocking cover 2, a second motor 304 for driving the second threaded rod 301 is installed inside the preparation chamber 102, a second sleeve 305 is fixed to the upper end of the connecting plate 303, a second slide rod 306 is slidably connected to the second sleeve 305, and one end of the second slide rod 306 is fixed to the inside of the preparation chamber 102;

[0050] It should be noted here that: the second motor 304 is used to drive the second threaded rod 301 to rotate. During the rotation of the second threaded rod 301, the mutual meshing transmission between the second threaded rod 301 and the second threaded tube 302 and the sliding guiding effect of the second sleeve 305 and the second slide rod 306 are used to make the connecting plate 303, which is subjected to force, perform lifting movement. The lifting movement of the connecting plate 303 drives the sealing cover 2 to perform lifting movement.

[0051] In this scheme: a heavy metal stability detection device for fly ash from incineration of domestic waste includes the following steps:

[0052] In the process of using the sampler 101 to prepare samples for the heavy metal stability of fly ash generated after the incineration of domestic waste to assist in subsequent testing, the sampling barrel 103 for sampling and testing is positioned inside the preparation chamber 102 through the positioning groove 104. After the placement is completed, the sealing cover 2 is driven to descend through the lifting assembly and abut against the upper end of the sampling barrel 103 to seal the sampling barrel 103;

[0053] After the sampling barrel 103 is blocked, the first solenoid valve 403 is opened, so that part of the incineration fly ash powder in the first storage box 401 is transported to the inside of the sampling barrel 103 through the first conveying hose 402. During the conveying process of the incineration fly ash powder, since the incineration fly ash powder is a light powder, part of the incineration fly ash powder after conveying is tilted upward and adsorbed on the inner wall of the sampling barrel 103. After a certain amount of incineration fly ash powder is conveyed to the inside of the sampling barrel 103, the first solenoid valve 403 is closed and the second solenoid valve 503 is opened, so that part of the test liquid in the second storage box 501 is conveyed to the inside of the annular liquid storage cylinder 701 through the second conveying hose 502 and the conveying pipe 703. As the test liquid flows toward the annular liquid storage cylinder 70 1. Through the pressure inside the annular liquid storage cylinder 701, the test liquid inside the annular liquid storage cylinder 701 is sprayed outward through the liquid outlet pipe 804 on each group of auxiliary components. Since the liquid outlet end of the liquid outlet pipe 804 is vertically upward in the initial state, the test liquid sprayed from the liquid outlet pipe 804 is rushed into the top of the inner side of the sampling barrel 103 under the action of pressure and finally flows to the bottom of the inner side of the sampling barrel 103. In this process, the test liquid rushed out from the liquid outlet pipe 804 rushes the incineration fly ash powder adsorbed inside the sampling barrel 103 into the bottom of the sampling barrel 103, avoiding that part of the incineration fly ash powder is not mixed with the test liquid due to adsorption inside the sampling barrel 103, ensuring the effect of sampling preparation, and further ensuring the accuracy of subsequent detection;

[0054] In the process of supplying and delivering the test liquid, the driving ring 901 is moved toward the annular liquid storage cylinder 701 through the driving assembly and the guide assembly. During the movement, the rack 903 is driven to move synchronously through the L-shaped frame 902. During the movement of the rack 903, the rack 903 and the first gear 904 are meshed with each other to drive the mounting shaft 802 and the collar 803 to rotate. During the rotation of the collar 803, the liquid outlet end of the liquid outlet pipe 804 is driven to rotate and adjust from the vertical state to the bottom of the annular liquid storage cylinder 701 (the final state is referred to as Fig.10 ), during the adjustment process, the incineration fly ash powder adsorbed on the inner wall at different heights inside the sampling barrel 103 is flushed in and mixed through the continuous liquid discharge from the liquid outlet end of the liquid outlet pipe 804, and in the process of adjusting the liquid outlet angle of each group of liquid outlet pipes 804, the annular liquid storage cylinder 701 is rotated by the rotating component, and the rotation of the annular liquid storage cylinder 701 drives each group of liquid outlet pipes 804 to rotate synchronously, which is further convenient for auxiliary flushing and mixing of the incineration fly ash powder adsorbed at different positions inside the sampling barrel 103, ensuring that the sampling between the incineration fly ash powder and the test liquid meets the expected requirements. After the incineration fly ash powder and the test liquid are fed and transported, the incineration fly ash powder and the test liquid in the sampling barrel 103 are stirred and mixed through the stirring component, and further the sampling between the incineration fly ash powder and the test liquid achieves the expected effect.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0056] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A device for detecting heavy metal stability of fly ash from incineration of domestic waste, comprising: A sampling machine (101) for sampling and preparing test samples in the process of detecting the heavy metal stability of fly ash from the incineration of domestic waste, wherein a preparation chamber (102) for preparing the test samples is provided inside the sampling machine (101), a sampling bucket (103) is provided inside the preparation chamber (102), and a positioning groove (104) for assisting the positioning of the sampling bucket (103) is provided inside the preparation chamber (102); It is characterized by further comprising: A sealing cover (2) is arranged inside the preparation chamber (102) for covering the sampling barrel (103); a lifting component for lifting the sealing cover (2) is arranged inside the preparation chamber (102); a first feeding component and a second feeding component are arranged inside the preparation chamber (102) for feeding and preparing materials inside the sampling barrel (103) after the sealing cover (2) and the sampling barrel (103) are covered; a stirring component is arranged on the sealing cover (2) for stirring during the sampling preparation process; and a control component for controlling during the feeding process is arranged on the inner side of the sealing cover (2); The control component comprises an annular liquid storage cylinder (701) arranged on the inner side of the blocking cover (2); the upper end of the annular liquid storage cylinder (701) is rotatably connected to an annular plate (702) for blocking the upper end of the annular liquid storage cylinder (701); the annular plate (702) and the inner wall of the blocking cover (2) are connected and fixed via a plurality of groups of connecting frames (704); a delivery pipe (703) for supplying liquid to the inside of the annular liquid storage cylinder (701) is installed on the upper end of the annular plate (702); auxiliary components for assisting liquid discharge are arranged around the annular liquid storage cylinder (701), and the plurality of groups of auxiliary components are arranged in an annular array around the annular liquid storage cylinder (701); and a rotating component for rotating the annular liquid storage cylinder (701) is arranged on the blocking cover (2); The auxiliary component comprises two groups of mounting frames (801) fixed on the outside of the annular liquid storage cylinder (701), a collar (803) is arranged between the two groups of mounting frames (801), mounting shafts (802) are fixed on both sides of the collar (803), the two groups of mounting shafts (802) are rotatably connected to the two groups of mounting frames (801), a liquid outlet pipe (804) is fixed on the inner side of the collar (803), one end of the liquid outlet pipe (804) is arranged to communicate with the inside of the annular liquid storage cylinder (701), the liquid outlet end of the liquid outlet pipe (804) is arranged vertically upward in an initial state, and an adjustment component for adjusting the state of the liquid outlet pipe (804) on each group of auxiliary components is arranged below the annular liquid storage cylinder (701); The adjustment assembly comprises a drive ring (901) arranged below the annular liquid storage cylinder (701); a drive assembly for driving the drive ring (901) and a guide assembly for guiding during the driving process are arranged between the annular liquid storage cylinder (701) and the drive ring (901); a rack (903) is fixedly mounted on the upper end of the drive ring (901) via an L-shaped frame (902); a first gear (904) is fixedly mounted on one end of the mounting shaft (802); and the first gear (904) and the rack (903) are meshed with each other.

2. The heavy metal stability detection device for fly ash from incineration of domestic waste according to claim 1 is characterized by: The driving assembly comprises a first threaded rod (1001) rotatably connected to the upper end of a driving ring (901); a first threaded tube (1002) is threadedly engaged with the first threaded rod (1001); one end of the first threaded tube (1002) is fixed to the lower end of an annular liquid storage cylinder (701); and a first motor (1003) for driving the first threaded rod (1001) is mounted at the lower end of the driving ring (901).

3. The heavy metal stability detection device for fly ash from incineration of domestic waste according to claim 2 is characterized by: The guide assembly comprises a first sleeve (1101) fixed to the lower end of the annular liquid storage cylinder (701), a first sliding rod (1102) being slidably connected to the first sleeve (1101), and one end of the first sliding rod (1102) being fixed to the driving ring (901).

4. The heavy metal stability detection device for fly ash from incineration of domestic waste according to claim 1 is characterized by: The rotating assembly comprises a rotating shaft (1201) rotatably connected to the inner side of the blocking cover (2); a second gear (1202) is fixed to one end of the rotating shaft (1201); a gear ring (1203) is fixed to the outer side of the annular liquid storage cylinder (701); the second gear (1202) and the gear ring (1203) are meshed with each other; and a driving motor (1204) for driving the rotating shaft (1201) is mounted on the upper end of the blocking cover (2).

5. The heavy metal stability detection device for fly ash from incineration of domestic waste according to claim 1 is characterized by: The first material supply assembly comprises a first storage box (401) fixed inside the preparation chamber (102), wherein the first storage box (401) contains fly ash powder from the incineration of domestic waste to be detected, and a first conveying hose (402) is connected between the first storage box (401) and the sealing cover (2), and a first solenoid valve (403) for discharging control is installed on the first conveying hose (402).

6. The heavy metal stability detection device for fly ash from incineration of domestic waste according to claim 1 is characterized by: The second material supply assembly comprises a second storage box (501) fixed inside the preparation chamber (102), wherein the second storage box (501) contains a test liquid for assisting in the preparation of the test sample, and a second delivery hose (502) is connected between the second storage box (501) and the delivery pipe (703), and a second solenoid valve (503) for material discharge control is installed on the second delivery hose (502).

7. The heavy metal stability detection device for fly ash from incineration of domestic waste according to claim 1 is characterized by: The stirring assembly comprises a stirring shaft (601) rotatably connected to the sealing cover (2); the annular liquid storage cylinder (701) is sleeved on the outside of the stirring shaft (601); a plurality of stirring rods (602) are fixed to the stirring shaft (601); and a motor (603) for driving the stirring shaft (601) is mounted on the upper end of the sealing cover (2).

8. The heavy metal stability detection device for fly ash from incineration of domestic waste according to claim 1 is characterized by: The lifting assembly comprises a second threaded rod (301) rotatably connected to the inside of the preparation chamber (102); a second threaded tube (302) is threadedly engaged with the second threaded rod (301); a connecting plate (303) is fixed to one end of the second threaded tube (302); one end of the connecting plate (303) is fixed to one side of the blocking cover (2); a second motor (304) for driving the second threaded rod (301) is installed inside the preparation chamber (102); a second sleeve (305) is fixed to the upper end of the connecting plate (303); a second sliding rod (306) is slidably connected to the second sleeve (305); one end of the second sliding rod (306) is fixed to the inside of the preparation chamber (102).

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