阅读说明：本技术 一种出渣装置 (Slag discharging device ) 是由 刘伟 张明明 李著松 刘乐 方小龙 石国强 叶珂呈 于 2021-07-26 设计创作，主要内容包括：本发明公开一种出渣装置,包括吸管、管体、挡流板以及动力件；吸管的一端用于吸入介质,吸管的另一端插入管体内；管体的内壁与吸管的外壁之间设有至少两组挡流板；多组挡流板沿吸管周向设置,且沿周向相邻的两组挡流板之间形成用于气流加速的通道；动力件向通道的进气口输送气流,气流经通道的窄口受压后向出气口加速射出,能够获得两倍音速的射流,第一圆锥段将气流导向第一圆锥段的小端口处,气流在第一圆锥段的小端口处与气体混合,并交换动量向前射出,使第一圆锥段的小端口内产生真空,并使吸管内产生负压,使得吸管由吸口端持续吸入介质,通过提高动力件输送的气源压力,可以有效提升介质输送的距离。(The invention discloses a slag discharging device, which comprises a suction pipe, a pipe body, a flow baffle and a power part, wherein the suction pipe is arranged in the pipe body; one end of the suction pipe is used for sucking media, and the other end of the suction pipe is inserted into the pipe body; at least two groups of flow baffle plates are arranged between the inner wall of the pipe body and the outer wall of the suction pipe; the plurality of flow baffle plates are arranged along the circumferential direction of the suction pipe, and a channel for accelerating air flow is formed between two adjacent sets of flow baffle plates along the circumferential direction; the power piece carries the air current to the air inlet of passageway, the gas flow jets out with higher speed to the gas outlet after the slot pressurized of passageway, can obtain the efflux of twice sound speed, first cone section leads the little port department of first cone section with the air current, the air current is at the little port department of first cone section and gas mixing, and exchange momentum jets out forward, produce the vacuum in the little port of messenger's first cone section, and produce the negative pressure in making the straw, make the straw last suction medium by the suction port end, through the air supply pressure that improves power piece transport, can effectively promote the distance that the medium carried.)

1. The slag discharging device is characterized by comprising a suction pipe (1), a pipe body (2), a flow baffle (3) and a power part; one end of the suction pipe is used for sucking media, and the other end of the suction pipe is inserted into the pipe body (2);

at least two groups of flow baffles (3) are arranged between the outer wall of the suction pipe (1) and the inner wall of the pipe body (2); the plurality of flow baffle plates are arranged along the circumferential direction of the suction pipe, and a channel for accelerating air flow is formed between two adjacent sets of flow baffle plates along the circumferential direction; the channel comprises an air inlet (3.1), a narrow opening (3.2) and an air outlet (3.3) along the medium flow direction; the width of the air inlet and the width of the air outlet are both larger than the width of the narrow opening along the circumferential direction of the suction pipe;

the power part is communicated with an air inlet (3.1) of the channel and is used for conveying airflow to the air inlet; the other end of straw is equipped with first conical segment (1.1), and the free end of first conical segment is the port of first conical segment, and first conical segment is used for leading the air current in the passageway to the port of first conical segment.

2. Tapping device according to claim 1, wherein the pipe body (2) comprises a first pipe body (2.1); the flow baffle (3) is arranged between the outer wall of the suction pipe and the inner wall of the first pipe body (2.1); the first pipe body (2.1) is divided into a second conical section (2.11) and a third conical section (2.12); the first conical section (1.1) penetrates through the second conical section (2.11) and is inserted into the third conical section (2.12); along the medium flow direction, the large port of the second conical section (2.11) is far away from the first conical section (1.1), and the small port of the second conical section (2.11) is the large port of the third conical section; the length of the second conical section (2.11) is equal to the length from the air inlet (3.1) to the narrow opening (3.2) of the channel along the medium flow direction.

3. Tapping device according to claim 2, characterised in that the third conical section (2.12) has a length in the medium flow direction equal to the length of the passage from the narrow mouth (3.2) to the gas outlet (3.3), and that the first conical section (1.1) has a greater taper than the third conical section (2.12).

4. Tapping device according to claim 2, wherein the pipe body (2) further comprises a second pipe body (2.2); one end of the second pipe body (2.2) is a fourth conical section (2.21); the inner diameter of a large port of the fourth conical section is consistent with the inner diameter of a small port of the third conical section, the inner diameters of the large port and the small port of the third conical section are along the flow direction of the medium, the large port and the small port of the third conical section are in involution with the central axis, and the fourth conical section is used for guiding the airflow of the air outlet (3.3) of the channel to the small port of the first conical section (1.1).

5. The slag tapping device according to claim 4, wherein one end of the flow baffle (3) close to the fourth conical section is provided with a limit arc block (3.4); the inner wall of the fourth conical section (2.21) is provided with an arc-shaped groove corresponding to the limiting arc block; the limiting arc block is inserted into the arc-shaped groove.

6. Tapping device according to claim 4 or 5, wherein the second pipe body is divided in the medium flow direction into a fourth conical section, a mixing section and a fifth conical section; openings at two ends of the mixing section are respectively a small port of the fourth conical section and a small port of the fifth conical section.

7. Tapping device according to claim 6, further comprising a suction chamber housing (4); an annular cavity (4.1) is arranged in the suction chamber shell; the suction pipe penetrates through the annular cavity; the annular cavity is communicated with a large port of the second conical section (2.11); the power part is communicated with the annular cavity; the straw and the annular cavity are in the same axle wire.

8. Tapping device according to claim 6, wherein a straight pipe (5) is provided between the suction chamber housing (4) and the large end of the second conical section (2.11); the straight pipe is sleeved on the suction pipe, and two ends of the straight pipe are respectively communicated with the annular cavity and the large port of the second conical section.

9. Tapping device according to claim 7 or 8, wherein the suction pipe is provided with a first handle (7); a second handle (8) is arranged between the outer wall of the suction chamber shell and the outer wall of the second pipe body; a first valve is arranged on the suction pipe; and a second valve is arranged between the annular cavity and the power part.

10. Tapping device according to claim 1, wherein the inner side wall surface of the channel is curved (3.5); the curved surface is used for guiding flow.

Technical Field

The invention relates to the field of fluid machinery, in particular to a slag discharging device.

Background

The slag tapping device in the prior art has the following defects that 1, equipment with limited arrangement space, such as a miniature tunneling machine or a small-sized tunneling machine, has strict requirements on the sizes of elements of various systems, and the size of the conventional slag tapping device is one of main factors for restricting the further application of the miniature tunneling machine or the small-sized tunneling machine; 2. although the vacuum slag discharging device which is applied in a small range is available at present, the vacuum slag discharging device has the problems of overlarge device size, complex relation between a control gas circuit and logic, high cost, heavy weight, inconvenience in manual operation, inconvenience in carrying to enter a place with limited operation space and the like; 3. the method has the advantages that the method mainly depends on manual cleaning to remove silt and fallen slag in the shield tunnel, a large amount of resources are consumed for manual cleaning, the efficiency is low, and in the face of complex multiphase media, the traditional submersible pump, the pneumatic diaphragm pump, the slag slurry pump and the like have the defects that the traditional submersible pump, the traditional pneumatic diaphragm pump, the traditional slag slurry pump and the like cannot be completely cleaned, are easy to suck, need a sedimentation tank, have larger medium influence on the service life of components and the like; 4. the construction environment in the fields of coal mines, petrifaction and the like contains flammable and explosive and toxic and harmful media, so that dangerous sources such as electric sparks and heating cannot exist in the working environment, but the existing slag tapping equipment in the fields of coal mines, petrifaction and the like contains electric elements which need to provide power supply or control signals, and after the elements are aged or work for a long time, the dangerous sources such as electric sparks and heating can be generated, so that explosion is caused.

To sum up, the slag discharging device which has good applicability, simple structure and stable performance, can adapt to different working conditions and does not contain electric elements is urgently needed to solve the problems existing in the prior art.

Disclosure of Invention

The invention aims to provide a slag tapping device which has good applicability, simple structure and stable performance, can adapt to different working conditions and does not contain electric elements, and the specific technical scheme is as follows:

a slag discharging device comprises a suction pipe, a pipe body, a flow baffle and a power part; one end of the suction pipe is used for sucking media, and the other end of the suction pipe is inserted into the pipe body; at least two groups of flow baffles are arranged between the outer wall of the suction pipe and the inner wall of the pipe body; the plurality of flow baffle plates are arranged along the circumferential direction of the suction pipe, and a channel for accelerating air flow is formed between two adjacent sets of flow baffle plates along the circumferential direction; the channel comprises an air inlet, a narrow opening and an air outlet along the medium flow direction; the width of the air inlet and the width of the air outlet are both larger than the width of the narrow opening along the circumferential direction of the suction pipe; the power part is communicated with the air inlet of the channel and is used for conveying airflow to the air inlet; the other end of the suction pipe is provided with a first conical section, the free end of the first conical section is a small port of the first conical section, and the first conical section is used for guiding airflow in the channel to the small port of the first conical section.

Preferably, in the above technical solution, the pipe body includes a first pipe body; the flow baffle is arranged between the outer wall of the suction pipe and the inner wall of the first pipe body; the first pipe body is divided into a second conical section and a third conical section; the first conical section penetrates through the second conical section and is inserted into the third conical section; along the medium flow direction, the large port of the second conical section is far away from the first conical section, and the small port of the second conical section is the large port of the third conical section; the length of the second conical section is equal to the length from the air inlet to the narrow opening of the channel along the medium flow direction.

Preferably, in the above technical scheme, along the medium flow direction, the length of the third conical section is equal to the length from the narrow opening of the passage to the air outlet, and the taper of the first conical section is greater than the taper of the third conical section.

Preferably, in the above technical solution, the tube further includes a second tube; one end of the second pipe body is a fourth conical section; the inner diameter of the large port of the fourth conical section is consistent with the inner diameter of the small port of the third conical section, the large port of the fourth conical section and the small port of the third conical section are in involution with the central axis along the flow direction of the medium, and the fourth conical section is used for guiding the air flow of the air outlet of the channel to the small port of the first conical section.

Preferably, one end of the flow baffle, which is close to the fourth conical section, is provided with a limiting arc block; the inner wall of the fourth conical section is provided with an arc-shaped groove corresponding to the limiting arc block; the limiting arc block is inserted into the arc-shaped groove.

Preferably, in the above technical scheme, the second pipe body is divided into a fourth conical section, a mixing section and a fifth conical section along the medium flow direction; openings at two ends of the mixing section are respectively a small port of the fourth conical section and a small port of the fifth conical section.

The preferable technical proposal also comprises a suction chamber shell; an annular cavity is arranged inside the suction chamber shell; the suction pipe penetrates through the annular cavity; the annular cavity is communicated with the large port of the second conical section; the power part is communicated with the annular cavity; the straw and the annular cavity are in the same axle wire.

Preferably, a straight pipe is arranged between the suction chamber shell and the large port of the second conical section; the straight pipe is sleeved on the suction pipe, and two ends of the straight pipe are respectively communicated with the annular cavity and the large port of the second conical section.

Preferably, the straw is provided with a first handle; a second handle is arranged between the outer wall of the suction chamber shell and the outer wall of the second pipe body; a first valve is arranged on the suction pipe; and a second valve is arranged between the annular cavity and the power part.

Preferably, in the technical scheme, the inner side wall surface of the channel is a curved surface; the curved surface is used for guiding flow.

The technical scheme of the invention has the following beneficial effects:

(1) the slag discharging device comprises a suction pipe, a pipe body, a flow baffle and a power part; one end (suction end) of the straw is used for sucking a medium, and the other end of the straw is inserted into the pipe body; at least two groups of flow baffle plates are arranged between the inner wall of the pipe body and the outer wall of the suction pipe; the plurality of flow baffle plates are arranged along the circumferential direction of the suction pipe, and a channel for accelerating air flow is formed between two adjacent sets of flow baffle plates along the circumferential direction; the power part conveys airflow (compressed air) to the air inlet of the channel, the airflow is pressurized by the narrow opening of the channel and then accelerated to be ejected out of the air outlet, jet flow with double sound speed can be obtained, the airflow is guided to the small port of the first conical section by the first conical section, the airflow is mixed with the air at the small port of the first conical section and is ejected out forwards by exchanging momentum, so that vacuum is generated in the small port of the first conical section, negative pressure is generated in the suction pipe, the suction pipe continuously sucks medium from the suction end, and the distance for conveying the medium can be effectively increased by improving the pressure of an air source conveyed by the power part; compared with the prior art, the invention has the advantages that 1, the channel is set to be in a shape with two large ends and a narrow middle part, so that the airflow is accelerated, the thickness of the flow baffle plate can be selected according to actual requirements to adjust the depth (the radial depth) of the channel or the distance between two sets of flow baffle plates along the circumferential direction (namely, the width of the channel along the circumferential direction) is selected according to actual requirements, so that the resistance of the airflow is reduced, the occupation ratio of the effective flow area of a narrow opening to the critical section area (the critical section is a fan-shaped section formed in the radial direction after the spray pipe and the second conical section are separated by the flow baffle plate at the narrow opening) is improved, the stagnation phenomenon is prevented from occurring in advance, the jet flow velocity cannot be further improved, the flow resistance is reduced by increasing the radial gap between the suction pipe and the pipe body in the prior art, but the radial gap between the suction pipe and the pipe body is directly increased, so that the flow area of the airflow is also increased, the increase of the flow area can lead to severe increase of stagnation flow, the air consumption is doubled and the speed of outlet jet flow is not obviously increased actually, thus leading to efficiency reduction and failing to control the efficiency of the device in the most reasonable range; 2. compared with the traditional blade type or positive displacement slag suction pump (slurry pump), the invention has simple structure, low cost and easy production and installation, and has no rotating component, so the dynamic balance test and adjustment are not needed; in addition, the invention has no key parts (such as a blade rotor or a piston head) which do relative motion, can greatly reduce the times of maintaining and replacing parts, and has strong practicability and economy; 3. compared with the prior art of an electrically driven and electrically controlled blade type or positive displacement slag suction pump (slag slurry pump), the invention does not depend on electric drive and electric control, thus higher reliability can be kept in high magnetic interference or complex electromagnetic working environment, and the invention can safely operate in flammable and explosive or closed space and other environments, and has high reliability; meanwhile, the invention saves a huge slag storage tank and an expensive pneumatic automatic control system, further reduces the volume, is more convenient for operation in narrow space, further saves the cost and is convenient for effective popularization and application.

(2) The pipe body of the present invention includes a first pipe body; the first pipe body is divided into a second conical section and a third conical section along the medium flow direction; the length of the second conical section is equal to the length from the air inlet of the channel to the narrow opening, so that the air flow is subjected to adiabatic compression under the matching of the second conical section (the inner diameter of the second conical section is gradually reduced along the medium flow direction) and the channel, the flow speed is increased, and the jet flow is convenient to form.

(3) The length of the third conical section is equal to the length from the narrow opening of the channel to the air outlet, and the air flow of the narrow opening is guided to the small port of the first conical section through the matching of the third conical section and the first conical section, so that the air flow loss is reduced; and the conicity of the first conical section is greater than the conicity of the third conical section (namely, the radial gap between the first conical section and the third conical section is enlarged), so that the airflow obtains higher flow velocity after the narrow opening is pressed out, and the jet flow efficiency is good.

(4) The pipe body of the present invention further comprises a second pipe body; one end of the second pipe body is a fourth conical section; the inner diameter of the large port of the fourth conical section is consistent with the inner diameter of the small port of the third conical section, the flow direction of the medium is along, the large port of the fourth conical section and the small port of the third conical section are oppositely combined with the central axis, and the air flow of the air outlet of the channel is guided to the small port of the first conical section through the fourth conical section, so that the air flow loss is reduced, and the jet effect is optimized.

(5) One end of the flow baffle, which is close to the fourth conical section, is provided with a limiting arc block; the inner wall of fourth cone section is equipped with the arc wall that corresponds with spacing arc piece, through setting up spacing arc piece and arc wall, prevents that the relative first body of second body from taking place to rotate to the assembly of being convenient for.

(6) The second pipe body is divided into a fourth conical section, a mixing section and a fifth conical section along the medium flow direction; openings at two ends of the mixing section are respectively a small port of a fourth conical section and a small port of a fifth conical section, the fourth conical section is convenient for guiding airflow to the small port of the first conical section, the airflow is subjected to momentum exchange with a medium sucked by the suction pipe at the small port of the first conical section, the medium is wrapped by the airflow and flows to the mixing section in an accelerating manner, the airflow and impurities are mixed in the mixing section, and the mixture is conveyed outwards through the third conical section after being mixed, so that blockage is avoided.

(7) The invention also includes a suction chamber housing; an annular cavity is arranged inside the suction chamber shell; the annular cavity can change the flow direction of the airflow with the minimum resistance, so that the airflow is changed from radial flow to axial flow, the local loss is reduced, and meanwhile, the annular cavity has a certain airflow stabilizing effect, so that the airflow jet efficiency is improved; the suction pipe and the annular cavity are in the same axle wire, so that the flow of the airflow entering the air inlet from different positions is equal, and the airflow loss is prevented.

(8) A straight pipe is connected between the suction chamber shell and the large port of the second conical section; the straight pipe is sleeved on the suction pipe, the two ends of the straight pipe are respectively communicated with the annular cavity and the large end opening of the second conical section, air flow of the annular cavity enters the air inlet of the channel through a gap between the inner wall of the straight pipe and the outer wall of the suction pipe, the air flow entering the annular cavity can be stabilized again through the straight pipe, and partial turbulence is eliminated.

(9) The first handle and the second handle are convenient to carry and hold; through the operation of first valve and second valve controlling means, convenient and fast easily controls.

(10) The inner side wall surface of the channel is a curved surface; the air flow is guided to the narrow opening of the channel through the curved surface, the air flow is pressed at the narrow opening, and the air flow is accelerated to the air outlet of the channel through the curved surface after being pressed by the narrow opening, so that the pneumatic performance and the acceleration effect are good.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic view of the slag tapping device of the present embodiment (power member not shown);

FIG. 2 is a partial schematic view of FIG. 1;

FIG. 3 is an enlarged view of A in FIG. 1;

FIG. 4 is a schematic view of the combination of the flow baffle and the suction tube;

FIG. 5 is a schematic view of the engagement of the limiting arc block and the arc slot;

FIG. 6 is a schematic diagram of the included angle between the inner walls of the first and third conical sections and the central axis;

wherein, 1, a straw; 1.1, a first conical section; 1.2, a suction end; 2. a pipe body; 2.1, a first pipe body; 2.11, a second conical section; 2.12, a third conical section; 2.13, matching pipes; 2.2, a second pipe body; 2.21, a fourth conical section; 2.22, a mixing section; 2.23, a fifth conical section; 3. a flow baffle plate; 3.1, an air inlet; 3.2, narrow opening; 3.3, an air outlet; 3.4, limiting the arc block; 3.5, curved surface; 4. a suction chamber housing; 4.1, an annular cavity; 5. a straight pipe; 6. an elbow pipe; 7. a first handle; 8. a second handle.

Detailed Description

Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.

Example (b):

a slag discharging device comprises a suction pipe 1, a pipe body 2, a flow baffle 3 and a power part (not shown); the first end (suction end 1.2) of the suction pipe is used for sucking media, the pipe body 2 comprises a first pipe body 2.1 and a second pipe body 2.2, and the second end (outlet end) of the suction pipe is inserted into the first pipe body; the second pipe body is inserted into the first pipe body; the baffle plate is arranged between the outer wall of the second end of the suction pipe and the inner wall of the first pipe body, the baffle plates (three groups are preferably selected in the embodiment) are arranged at equal intervals along the circumferential direction of the suction pipe, a channel for accelerating air flow is formed between two adjacent baffle plates along the circumferential direction, and the power part (such as an air compressor) inputs air flow (compressed air) to the air inlet so that jet flow is formed after the air flow is accelerated, as shown in fig. 1-5, the baffle plate is specifically as follows:

as shown in fig. 4, the channel is divided into an inlet 3.1, a narrow opening 3.2 and an outlet 3.3 in the direction of the medium flow; along the medium flow direction, the width (along the width of straw circumferencial direction) of air inlet to slot diminishes gradually (makes the area of the flow of air inlet to slot reduce gradually, and the air current accelerates to local sound velocity, and the slot is the critical section along radial cross section this moment), and the width (along the width of straw circumferencial direction) of slot to gas outlet grow gradually, and power component inputs the air current to the air inlet of passageway, and the air current shrinks gradually and accelerates in the section of air inlet to slot, reaches the sound velocity critical just when the slot, and through the section of slot to export with higher speed and shoot out to form the efflux. Preferably, the side wall surface of the channel is a curved surface 3.5; the curved surface is used to guide the air flow of the inlet 3.1 into the narrow mouth of the channel and out of the narrow mouth.

As shown in FIG. 4, the width of the air inlet along the circumferential direction of the suction pipe is L₁The width of the narrow opening along the circumferential direction of the suction pipe is L₂The width of the air outlet along the circumferential direction of the suction pipe is L₃，L₁And L₃Are all greater than L₂。

As shown in fig. 1-2, the second end of the straw 1 is provided with a first conical section 1.1 (the large port of the first conical section is arranged on the straw, and the small port faces the second pipe), and the first conical section is inserted into the first pipe 2.1, specifically: the first pipe body 2.1 is divided into a second conical section 2.11, a third conical section 2.12 and a matching pipe 2.13 along the medium flow direction, the large port of the second conical section faces the suction end 1.2 of the suction pipe, the small port of the second conical section is the large port of the third conical section, the matching pipe 2.13 is connected with the end face of the small port of the third conical section 2.12, and the matching pipe and the third conical section share the same central axis; the first conical section 1.1 penetrates through the second conical section and is inserted into the third conical section.

Preferably, as shown in fig. 3, the length of the second conical section 2.11 (i.e. denoted D in fig. 3) in the direction of flow of the medium₁) Equal to the length of the inlet 3.1 to the narrow mouth 3.2 of the channel, so that the gas flows throughThe flow is adiabatically compressed, the flow speed is increased, and the flow speed is just increased to the local sound speed when the air flow reaches a narrow opening; along the medium flow direction, the inner diameter of the third conical section 2.12 is gradually reduced, so that the air flow from the narrow opening can be guided to the small port of the first conical section along the generatrix direction of the first conical section, and the jet loss is reduced; the length of the third conical section 2.12 in the direction of flow of the medium (i.e. denoted D in fig. 3)₂) The length from the narrow opening 3.2 of the channel to the air outlet 3.3 is equal, and the taper of the first conical section 1.1 is larger than that of the third conical section 2.12 (preferably, the taper of the first conical section is 1.1-3 times of that of the third conical section), so that the flow velocity of the airflow is increased after the airflow passes through the critical section, and the higher-speed jet flow is obtained. As shown in fig. 6, an included angle between the inner wall of the first conical section and the central axis is B, an included angle between the inner wall of the third conical section and the central axis is a, and B is greater than a.

As shown in fig. 2, the second pipe body 2.2 is divided into a fourth conical section 2.21, a mixing section 2.22 and a fifth conical section 2.23 along the medium flow direction; the big port of the fourth conical section 2.21 is inserted into the matching pipe 2.13 (the inner diameter of the matching pipe is matched with the outer diameter specification of the fourth conical section), the inner diameter specification of the big port of the fourth conical section 2.21 is consistent with the inner diameter specification of the small port of the third conical section 2.12, the big port of the fourth conical section is involuted with the small port of the third conical section, and the third conical section and the fourth conical section are in the same central axis; the airflow at the air outlet of the channel is guided to the small port of the first conical section 1.1 through the fourth conical section 2.21; openings at two ends of the mixing section 2.22 (equal-diameter circular tube) are respectively a small port of the fourth conical section 2.21 and a small port of the fifth conical section 2.23, air flow of an air outlet of the channel is jetted to the small port of the first conical section to be mixed with air, and is jetted out to the mixing section and the fifth conical section by exchanging momentum, so that vacuum is generated in the small port of the first conical section (namely, vacuum is generated according to a Venturi effect), a negative pressure is established from the small port of the suction pipe 1 along the first conical section 1.1 to the suction port end 1.2 of the suction pipe, and the suction pipe continuously sucks a medium (such as sludge) from the suction port end.

Preferably, as shown in fig. 5, one end of the flow baffle 3 close to the fourth conical section 2.21 is provided with a limiting arc block 3.4; the length of the limiting arc block along the medium flow direction is consistent with that of the fourth conical section; and an arc-shaped groove corresponding to the limiting arc block is formed in the inner wall of the fourth conical section 2.21, and the limiting arc block is inserted into the arc-shaped groove. The arc-shaped groove is matched with the limiting arc block in shape and specification and can be just embedded.

Preferably, as shown in fig. 2, the suction chamber further comprises a suction chamber housing 4 and a straight pipe 5; the suction chamber shell 4 is sleeved on the outer wall of the suction pipe 1 and is positioned on one side of the second conical section 2.11 close to the suction end of the suction pipe; an annular cavity 4.1 is formed in the suction chamber shell, the suction pipe penetrates through the annular cavity, and preferably the annular cavity and the suction pipe share the same central axis; two ends of the straight pipe 5 are respectively arranged on the suction chamber shell and the end face of the large port of the second conical section; the straight pipe (the equal-diameter circular pipe) is sleeved on the suction pipe, two ends of the straight pipe are respectively communicated with the annular cavity 4.1 and the large port of the second conical section 2.11, and the inner diameter of the straight pipe is preferably consistent with the inner diameter of the large port of the second conical section.

Preferably, the power member communicates with the annular cavity 4.1 via an elbow conduit 6.

Preferably, a first valve is arranged on the suction pipe; and a second valve is arranged on the elbow pipeline.

Preferably, as shown in fig. 1, a first handle 7 is arranged on the suction pipe; and a second handle 8 is arranged between the outer wall of the suction chamber shell and the outer wall of the second pipe body.

Preferably, a large port of the fifth conical section 2.23 is connected with a conveying pipeline, so that impurities can be conveyed outwards conveniently.

Preferably, through setting up the fender flow board, can effectively improve the speed of air current, be convenient for form the efflux that speed is higher, as shown in table 1 below:

TABLE 1 jet velocity contrast formed with and without a flow baffle

In table 1, bar represents pressure; as shown in FIG. 6, P₁Representing a third cone segment small port; p₂A small port representing a first conical segment; as can be seen from Table 1, by providing a baffle plateEffectively improving the jet speed.

The work flow of the slag discharging device of the embodiment is as follows:

1. the power part conveys airflow (compressed air) into the annular cavity 4.1 through the elbow pipeline 6, the airflow enters a gap between the straight pipe 5 and the suction pipe 1 and flows to the air inlet 3.1 of the channel from the gap;

2. the airflow is continuously gathered towards the narrow opening 3.2 under the guidance of the inner side wall surface of the channel, the airflow is pressurized at the narrow opening, the airflow is accelerated to be ejected after passing through the narrow opening, the airflow which is ejected from the narrow opening is guided to the small port of the first conical section 1.1 through the first conical section 1.1 and the fourth conical section 2.21, the airflow is mixed with the air at the small port of the first conical section 1.1, the airflow is ejected towards the mixing section 2.22 and the fifth conical section 2.23 after momentum exchange, and negative pressure is established in the small port of the first conical section 1.1, so that the suction end 1.2 of the suction pipe continuously sucks media;

3. the medium flows out from the small port of the first conical section 1.1 and is wrapped by the airflow from the continuous jet flow to be ejected outwards towards the mixing section 2.22, so that the continuous suction and ejection processes are completed;

4. after the work is finished, the power part stops conveying airflow, and the device stops working.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.