Negative pressure drainage device for mesh belt furnace

Abstract

The utility model discloses a negative pressure drainage device for a mesh belt furnace. The negative pressure drainage device comprises an air outlet sleeve, a drainage sleeve and an air inlet sleeve, a convex ring is arranged in the middle of a sleeve body of the air outlet sleeve and divides the air outlet sleeve into an air outlet section and an inserting section, an outer threaded hole is formed in the outer side of the convex ring, the drainage sleeve comprises a connecting section and a flow guide section, inner threads are arranged on the inner side of the connecting section, the inner diameter of the flow guide section is larger than the outer diameter of the inserting section, and the outer threaded hole is formed in the outer side of the connecting section. An air flow guide structure is arranged at the bottom of the flow guide section, a discharge assisting pipe is externally connected to the outer wall of the flow guide section, the air inlet sleeve comprises a clamping seat and an air inlet section, the clamping seat is fixed to the top of the air inlet section, the inner diameter of the clamping seat is matched with the outer diameter of the flow guide section, and a pressure measuring pipe is installed in the middle of the air inlet section. By means of the mode, the guide strength of air flow can be conveniently adjusted on site, the structure is simple, and disassembly and maintenance are convenient.

Description

Technical Field

[0001] The utility model relates to the field of furnace equipment, in particular to a negative pressure drainage device for a mesh belt furnace. Background Art

[0002] A mesh belt furnace is a device that uses a mesh belt mechanism to send products into the furnace for high-temperature heat treatment. The internal structure of the mesh belt furnace is generally divided into a preheating section and a high-temperature section. During the preliminary heating of the products in the preheating section, the organic matter mixed in the products will gasify at high temperatures. These gasified organic matter molecules need to be discharged from the preheating section in a timely manner. Otherwise, on the one hand, it is easy to condense and accumulate into grease at the outlet, and too much grease dripping on the products will directly contaminate the product surface and damage the products. On the other hand, if it enters the high-temperature section, it will seriously affect the sintering atmosphere and result in unsatisfactory product quality. Therefore, it is necessary to quickly discharge the waste gas from the preheating section in a timely manner. Currently, the commonly used exhaust device adds a high-pressure intake structure to the gas path, and uses the pressure difference formed by Bernoulli's principle to drive the waste gas in the furnace to be discharged faster. However, the exhaust speed of this structure cannot be directly adjusted, and can only be adjusted by changing the intake pressure of the high-pressure intake structure, which is very inconvenient. Moreover, the existing exhaust devices are generally a whole, and it is inconvenient to repair when problems occur. Content of the Utility Model

[0003] The main technical problem to be solved by the utility model is to provide a negative pressure drainage device for a mesh belt furnace, which can be conveniently adjusted on-site and is easy to repair.

[0004] To solve the above technical problem, a technical solution adopted by the utility model is: to provide a negative pressure drainage device for a mesh belt furnace, the negative pressure drainage device for a mesh belt furnace includes: an air outlet sleeve, a drainage sleeve, and an intake sleeve. The air outlet sleeve and the intake sleeve are respectively installed at both ends of the drainage sleeve; a convex ring is arranged in the middle of the barrel body of the air outlet sleeve, and the convex ring divides the air outlet sleeve into an air outlet section at the front end and a plug-in section at the rear end. External threaded holes are arranged on the outer side of the convex ring. The drainage sleeve includes a connection section and a diversion section. An internal thread matching the external thread on the convex ring is arranged on the inner side of the connection section. The inner diameter of the diversion section is larger than the outer diameter of the plug-in section. An air flow guiding structure is arranged at the bottom of the diversion section. A through intake hole is arranged on the outer wall of one side of the diversion section, and the intake hole is externally connected to an auxiliary exhaust pipe. The intake sleeve includes a clamping seat and an intake section. The clamping seat is fixed on the top of the intake section. The inner diameter of the clamping seat matches the outer diameter of the diversion section. A pressure measuring pipe is installed in the middle of the intake section; during assembly, the air outlet sleeve and the drainage sleeve are connected together through the internal thread of the connection section and the external thread at the position of the convex ring. The diversion section of the drainage sleeve is inserted into the clamping seat of the intake sleeve. At this time, the outer wall of the plug-in section and the inner wall of the diversion section together enclose a guiding air gap, and the top of the intake section abuts against the bottom of the diversion section.

[0005] In a preferred embodiment of the present utility model, a locking nut is further installed at the upper end of the convex ring.

[0006] In a preferred embodiment of the present utility model, the air flow guiding structure includes an annular guide plate provided at the bottom of the guiding section. The inner diameter of the annular guide plate is smaller than the outer diameter of the insertion section. The annular guide plate is inclined towards the air outlet direction, and the angle between the annular guide plate and the air outlet direction is between 30° and 60°. And a guide inclined surface matching the inclination angle of the annular guide plate is provided at the bottom of the insertion section.

[0007] In a preferred embodiment of the present utility model, an observation slit is provided in the middle of the clamping seat.

[0008] The beneficial effects of the present utility model are as follows: The present utility model changes the traditional exhaust structure into a three-section structure. By utilizing the characteristics of the three-section structure, the distance between the air flow guiding structure and the bottom of the insertion section can be changed by adjusting the distance of the threaded connection between the air outlet sleeve and the drainage sleeve, thereby changing the air outlet speed of the guiding air flow, and further adjusting the guiding effect on the waste gas in the furnace. This method has a simple overall structure and is convenient to adjust. It only needs on-site personnel to manually adjust according to the type of product to meet the actual requirements, which is more convenient and flexible. In addition, when the entire device has problems, this three-section type is also convenient for on-site personnel to disassemble and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a schematic assembly structure diagram of a preferred embodiment of the present utility model;

[0010] Figure 2 is Figure 1 a partial enlarged schematic diagram of the assembly structure in

[0011] Figure 3 is a schematic diagram of the upper section structure of the illustrated embodiment;

[0012] Figure 4 is a schematic diagram of the middle section structure of the illustrated embodiment;

[0013] Figure 5 is a schematic diagram of the lower section structure of the illustrated embodiment;

[0014] Figure 6 is a schematic diagram of the traditional guiding structure;

[0015] The marks of each component in the drawings are as follows:

[0016] 1. Air outlet sleeve, 2. Connection sleeve, 3. Air inlet sleeve, 4. High-pressure auxiliary exhaust pipe, 5. Pressure measuring pipe, 6. Locking nut;

[0017] 101. Gas outlet section, 102. Convex ring, 103. Insertion section, 104. Flow guiding inclined surface;

[0018] 201. Connection section, 202. Flow guiding section, 203. Annular flow guiding plate, 204. Air inlet hole;

[0019] 301. Air inlet section, 302. Clamping seat, 303. Observation slit. Specific embodiments

[0020] The following describes in detail the preferred embodiments of the present invention with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0021] Please refer to Figure 1 and Figure 2 , the embodiments of the present invention include:

[0022] A negative pressure drainage device for a mesh belt furnace, the negative pressure drainage device for a mesh belt furnace includes: an air outlet sleeve 1, a drainage sleeve 2 and an air inlet sleeve 3, the air outlet sleeve 1 and the air inlet sleeve 3 are respectively installed at both ends of the drainage sleeve 2; a convex ring 102 is provided in the middle of the barrel body of the air outlet sleeve 1, the convex ring 102 divides the air outlet sleeve 1 into an air outlet section 101 at the front end and an insertion section 103 at the rear end, an external threaded hole is provided on the outside of the convex ring 102, the drainage sleeve 2 includes a connection section 201 and a flow guiding section 202, an internal thread matching the external thread on the convex ring 102 is provided inside the connection section 201, the inner diameter of the flow guiding section 202 is larger than the outer diameter of the insertion section 103, an air flow guiding structure is provided at the bottom of the flow guiding section 202, a through air inlet hole 204 is provided on one outer wall of the flow guiding section 202, the air inlet hole 204 is externally connected to a high-pressure auxiliary exhaust pipe 4, the air inlet sleeve 3 includes a clamping seat 302 and an air inlet section 301, the clamping seat 302 is fixed on the top of the air inlet section 301, the inner diameter of the clamping seat 302 matches the outer diameter of the flow guiding section 202, and a pressure measuring pipe 5 is installed in the middle of the air inlet section 301; during assembly, the air outlet sleeve 1 and the drainage sleeve 2 are connected together through the internal thread of the connection section 201 and the external thread at the position of the convex ring 102, the flow guiding section 202 of the drainage sleeve 2 is inserted into the clamping seat 302 of the air inlet sleeve 3, at this time, the outer wall of the insertion section 103 and the inner wall of the flow guiding section 202 together enclose a guiding air gap, and the top of the air inlet section 301 is in close contact with the bottom of the flow guiding section 202. An observation slit 303 is provided in the middle of the clamping seat 302, and the contact situation between the top of the air inlet section 301 and the bottom of the flow guiding section 202 can be observed through the through slit, so that the two can be closely connected together.

[0023] A locking nut 6 is also installed at the upper end of the convex ring 102. By using the locking nut 6, the relative position between the air outlet sleeve 1 and the drainage sleeve 2 can be locked after adjusting the air gap position, preventing the change of the air gap.

[0024] The air flow guiding structure includes an annular guiding plate 203 arranged at the bottom of the guiding section 202. The annular guiding plate 203 is inclined towards the air outlet direction, and the inner diameter of the annular guiding plate 203 is smaller than the outer diameter of the insertion section 103. The included angle between the annular guiding plate 203 and the air outlet direction is between 30° and 60°. In actual implementation, generally, the included angle between the annular guiding plate 203 and the air outlet direction is about 50°. In this way, when the high-pressure gas enters the guiding air gap through the high-pressure gas assisting discharge pipe 4 and then sprays into the sleeve along the guiding air gap, it will incline forward circumferentially along the surface of the annular guiding plate 203, thereby forming a relative negative pressure inside the cylinder and driving the waste gas in the furnace to move forward quickly. Moreover, by rotating the relative position between the air outlet sleeve 1 and the drainage sleeve 2, the gap between the bottom of the insertion section 103 of the air outlet sleeve 1 and the annular guiding plate 203 can be adjusted, that is, the size of the air flow outlet, so as to change the size of the relative pressure difference.

[0025] A guiding inclined surface 104 matching the inclination angle of the annular guiding plate 203 is arranged at the bottom of the insertion section 103. In this way, cooperating with the annular guiding plate 203 can effectively reduce the generation of turbulence when the high-pressure air flow sprays out, making the guiding directionality better.

[0026] The whole negative pressure drainage device of the present utility model is constructed by adopting a three-section mechanism. In actual use, it is not only convenient to operate. By simply changing the relative position between the air outlet sleeve 1 and the drainage sleeve 2, the negative pressure environment inside the cylinder can be changed without changing the pressure of the externally input gas, so as to adapt to the processing requirements of different types of products. It is not only simple in structure and convenient to operate, but also convenient to disassemble and repair when problems occur.

[0027] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A negative pressure drainage device for a mesh belt furnace, characterized in that: The negative pressure drainage device for mesh belt furnace comprises: an air outlet sleeve, a drainage sleeve and an air inlet sleeve, wherein the air outlet sleeve and the air inlet sleeve are respectively installed at two ends of the drainage sleeve; A convex ring is arranged in the middle of the body of the air outlet sleeve, and the convex ring divides the air outlet sleeve into an air outlet section at the front end and a plug-in section at the rear end. An external threaded hole is arranged on the outer side of the convex ring. The guide sleeve comprises a connecting section and a guide section. An internal thread matching the external thread on the convex ring is arranged on the inner side of the connecting section. The inner diameter of the guide section is larger than the outer diameter of the plug-in section. An airflow guiding structure is arranged at the bottom of the guide section. A through air inlet hole is arranged on the outer wall of one side of the guide section. The air inlet hole is externally connected to an auxiliary exhaust pipe. The air inlet sleeve comprises a clamping seat and an air inlet section. The clamping seat is fixed on the top of the air inlet section. The inner diameter of the clamping seat matches the outer diameter of the guide section. A pressure measuring tube is installed in the middle of the air inlet section. During assembly, the air outlet sleeve and the guide sleeve are connected together through the internal thread of the connecting section and the external thread of the convex ring position, and the guide section of the guide sleeve is inserted into the clamping seat of the air inlet sleeve. At this time, the outer wall of the plug-in section and the inner wall of the guide section together enclose a guide air gap, and the top of the air inlet section abuts against the bottom of the guide section.

2. The negative pressure drainage device for mesh belt furnace according to claim 1, characterized in that: A locking nut is also installed on the upper end of the convex ring.

3. The negative pressure drainage device for mesh belt furnace according to claim 1, characterized in that: The airflow guiding structure includes an annular guide plate arranged at the bottom of the guide section, the inner diameter of the annular guide plate is smaller than the outer diameter of the plug-in section, the annular guide plate is inclined toward the air outlet direction, and the angle between the annular guide plate and the air outlet direction is between 30° and 60°.

4. The negative pressure drainage device for mesh belt furnace according to claim 3, characterized in that: The bottom of the plug-in section is provided with a flow guiding slope which matches the inclination angle of the annular flow guiding plate.

5. The negative pressure drainage device for mesh belt furnace according to claim 1, characterized in that: An observation slot is arranged in the middle of the card connector.

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