Valve box blowing gas circuit structure and manufacturing method thereof

Abstract

The invention relates to the technical field of sorting equipment, in particular to a valve box blowing gas circuit structure and a manufacturing method thereof. The valve box blowing gas circuit structure comprises a plurality of gas ejector pipes and a gas pipe mounting base, the gas ejector pipes are arranged in the first direction, and each gas ejector pipe is provided with a gas inlet end and a gas outlet end; the air pipe mounting seat covers the exteriors of the plurality of air spraying pipes, and a mounting structure is arranged on the air pipe mounting seat. According to the structure, the gas spraying channel is formed in the gas spraying pipe, and gas can enter from the gas inlet end of the gas spraying pipe and is sprayed out from the gas outlet end of the gas spraying pipe. The air pipe mounting base is equivalent to a protective shell covering the exteriors of the air injection pipes, the structural strength and the pressure bearing capacity of the air injection pipes can be improved through the protective shell, and the air injection pipes can be suitable for the high-pressure injection environment. The mounting structure on the air pipe mounting base is used for fixing the air pipe mounting base and the air spraying pipe on the air pipe mounting base to set positions so as to achieve fixed mounting of the air spraying pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of sorting equipment, and in particular to a valve box blowing air path structure and a manufacturing method thereof. Background Art

[0002] The valve box is the core component of the coal dry sorter, mineral dry sorter and color sorter, and has been widely used in the field of coal preparation and mineral processing. This type of sorting equipment uses jets to accurately control the movement trajectory of different materials, thereby achieving effective separation of materials. The performance of the valve box directly determines the sorting performance of the sorting equipment. In the current conventional configuration, the valve box is mainly composed of three parts: the solenoid valve assembly, the injection air path, and the solenoid valve control system. The injection air path system usually includes three key components: the nozzle, the transition duct, and the intake valve plate. During operation, the gas flows through the intake valve plate and the transition duct and is sprayed from the nozzle toward the material to achieve material separation.

[0003] There are two main structural forms of conventional spraying air circuits, namely the metal part punching structure and the hose connection structure. The metal part punching structure is to punch a hole in the metal block, which forms the air circuit. The hose connection form also uses a nozzle and an air intake valve plate punched by metal parts, but the nozzle and the air intake valve plate are connected by a hose. The structure of the metal part punching is complex, the processing cost is high, and the yield rate is low, but it has good stability in use and can be applied to high-pressure spraying environments. The hose solution is cheap and simple to process, but it has poor stability in use and is easy to damage. It cannot be used for high-pressure spraying and cannot spray extra-large or extra-heavy materials.

[0004] Therefore, how to design a blowing air path structure that takes into account the advantages of both the metal part punching structure and the hose connection structure is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] The first object of the present invention is to provide a valve box blowing air path structure to solve the technical problem that the existing valve box blowing air path structure cannot take into account the advantages of the metal part punching structure and the hose connection structure.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A valve box blowing air path structure, comprising: A plurality of air injection pipes are arranged along a first direction, each of the air injection pipes having an air inlet end and an air outlet end; The air pipe mounting seat is covered on the outside of the plurality of air jet pipes and is provided with a mounting structure.

[0007] Furthermore, a constriction structure is provided at the air outlet end of the air injection pipe.

[0008] Furthermore, the air jet pipe comprises a plurality of bent sections which are connected end to end in sequence at an angle; Any two adjacent bending sections are connected by a rounded transition.

[0009] Furthermore, the air jet pipe is made of stainless steel, copper or plastic; And / or, the trachea mounting seat is made of plastic or aluminum.

[0010] Furthermore, the air jet pipe is made of stainless steel, and the air pipe mounting seat is made of polyurethane.

[0011] Furthermore, the air injection pipe is formed by a pipe bending process or an injection molding process; And / or, the air pipe mounting seat is covered on the outside of the plurality of air injection pipes by a casting process.

[0012] Furthermore, the air inlet end of the air jet pipe and / or the air outlet end of the air jet pipe protrudes from the air pipe mounting seat.

[0013] Furthermore, it also includes an intake valve plate and a plurality of solenoid valves installed on the intake valve plate; An air intake cavity and a plurality of gas flow channels are provided in the air intake valve plate, the plurality of gas flow channels are arranged in one-to-one correspondence with the plurality of injection pipes, and the gas flow channels are arranged in communication between the air intake cavity and the corresponding injection pipes; Each of the gas flow channels is connected to a solenoid valve.

[0014] A second object of the present invention is to provide a method for manufacturing a valve box blowing air path structure, the method comprising the following steps: Process the required shape of the jet pipe according to the gas path design requirements; A plurality of the air injection pipes are arranged along a first direction, and an air pipe mounting seat covering the outside of the air injection pipes is formed by a casting process.

[0015] Furthermore, the step of processing the required shape of the jet pipe according to the gas path design requirements includes: Select a pipe with dimensions that meet the design requirements, process a necking structure at one end of the pipe, and bend the pipe to form the jet pipe; Alternatively, the air injection pipe is formed by an injection molding process.

[0016] Beneficial effects of the present invention: The present invention provides a valve box blowing air path structure and a manufacturing method thereof, wherein the valve box blowing air path structure comprises a plurality of jet pipes and an air pipe mounting seat, wherein: the plurality of jet pipes are arranged along a first direction, and the jet pipes have an air inlet end and an air outlet end; the air pipe mounting seat is coated on the outside of the plurality of jet pipes, and a mounting structure is arranged thereon.

[0017] In the above structure, a jet air passage is formed in the jet pipe, and the gas can enter from the air inlet end of the jet pipe and be ejected from the air outlet end of the jet pipe. The air pipe mounting seat is equivalent to a protective shell covering the outside of a plurality of jet pipes, and the protective shell can improve the structural strength and pressure bearing capacity of the jet pipe, so that the jet pipe can be suitable for a high-pressure blowing environment. The mounting structure on the air pipe mounting seat is used to fix the air pipe mounting seat and the jet pipe on the air pipe mounting seat at a set position to achieve fixed installation of the jet pipe.

[0018] Compared to the method of punching holes in metal parts to form the jet air passage, the valve box jet air passage structure provided by the present application forms the jet air passage by a jet pipe, which is more convenient to process and has lower processing costs. Compared to the hose connection structure, in the valve box jet air passage structure provided by the present application, the outside of the jet pipe is covered with an air pipe mounting seat, so the jet pipe has better structural strength and pressure bearing capacity, can be used in high-pressure jet environments, and has excellent stability in use and is not easy to damage. As described above, the valve box jet air passage structure provided by the present application has the advantages of both the metal part punching structure and the hose connection structure, and eliminates the disadvantages of the metal part punching structure and the hose connection structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A three-dimensional cross-sectional schematic diagram of an air injection pipe and an air pipe mounting seat in a valve box air injection path structure is provided for an embodiment of the present invention; Figure 2 for Figure 1 A magnified view at point A; Figure 3 A three-dimensional schematic diagram of an air injection pipe provided in accordance with an embodiment of the present invention; Figure 4 A cross-sectional schematic diagram of an air injection pipe provided in another embodiment of the present invention; Figure 5 A three-dimensional cross-sectional schematic diagram of a valve box blowing air path structure is provided for an embodiment of the present invention; Figure 6 A cross-sectional schematic diagram of a valve box blowing air path structure is provided for an embodiment of the present invention.

[0021] icon: 1-jet pipe; 11-narrowing structure; 12-bending section; 13-annular retaining ring; 2-trachea mounting seat; 21-mounting structure; 3-intake valve plate; 31-intake cavity; 4-Solenoid valve. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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.

[0023] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] It should be noted that in the description of the present invention, the terms "connection" and "installation" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or connected through an intermediate medium; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In one aspect, an embodiment of the present invention provides a valve box blowing gas path structure, referring to Figure 1 and Figure 2 , the valve box blowing air path structure includes: A plurality of air injection pipes 1 are arranged in a first direction, and the air injection pipes 1 have an air inlet end and an air outlet end; The air pipe mounting seat 2 is covered on the outside of a plurality of air jet pipes 1 and is provided with a mounting structure 21 .

[0026] In the above structure, a jet air passage is formed in the jet pipe 1, and the gas can enter from the air inlet end of the jet pipe 1 and be ejected from the air outlet end of the jet pipe 1. The air pipe mounting seat 2 is equivalent to a protective shell covering the outside of a plurality of jet pipes 1, and the protective shell can improve the structural strength and pressure bearing capacity of the jet pipe 1, so that the jet pipe 1 can be suitable for a high-pressure blowing environment. The mounting structure 21 on the air pipe mounting seat 2 is used to fix the air pipe mounting seat 2 and the jet pipe 1 on the air pipe mounting seat 2 at a set position to achieve fixed installation of the jet pipe 1.

[0027] Compared to the method of punching holes in metal parts to form the jet air passage, the valve box jet air passage structure provided by the present application forms the jet air passage by the jet pipe 1, which is more convenient to process and has lower processing costs. Compared to the hose connection structure, in the valve box jet air passage structure provided by the present application, the outside of the jet pipe 1 is covered with an air pipe mounting seat 2, so the jet pipe 1 has better structural strength and pressure bearing capacity, can be used in high-pressure blowing environments, and has excellent stability in use and is not easy to damage. As described above, the valve box jet air passage structure provided by the present application has the advantages of both the metal part punching structure and the hose connection structure, and eliminates the disadvantages of the metal part punching structure and the hose connection structure.

[0028] In this embodiment, the first direction is specifically the length direction of the trachea mounting seat 2 , that is, there are multiple air jet pipes 1 and they are distributed side by side along the length direction of the trachea mounting seat 2 .

[0029] Optionally, the mounting structure 21 includes at least one of a connecting through hole, a slot, and an insert block.

[0030] Exemplarily, the trachea mounting seat 2 includes a main body and connecting bosses connected to both sides of the main body, wherein: the main body is covered on the outside of a plurality of air jet pipes 1; and a plurality of connecting through holes are sequentially arranged on the connecting bosses along the length direction. When installing the trachea mounting seat 2, fasteners such as bolts are passed through the connecting through holes, and the trachea mounting seat 2 can be fixed in a set position by bolts. In addition, the trachea mounting seat 2 can also be provided with structures such as slots or plugs for positioning.

[0031] Reference Figure 2 and Figure 3 The outlet end of the jet pipe 1 is provided with a constriction structure 11, which forms the nozzle of the jet pipe 1. Figure 1 As shown, the lower end of the jet pipe 1 is the air inlet end, the upper end of the jet pipe 1 is the air outlet end, and the air outlet end of the jet pipe 1 is provided with a nozzle.

[0032] Furthermore, the jet pipe 1 includes a plurality of bent sections 12 connected end to end at an angle. The above arrangement forms a winding jet air passage in the jet pipe 1, which guides the airflow to the correct position and direction through the winding jet air passage, and prevents dust from entering from the nozzle when not jetting and falling into the solenoid valve 4, thereby affecting the performance of the solenoid valve 4.

[0033] Based on the above structure, any two adjacent bending sections 12 are connected by rounded transition. The jet pipe 1 adopts a structure with multiple rounded corners, which helps to reduce air flow resistance, so that the gas ejected from the nozzle has a higher pressure and flow, thereby achieving a better separation effect.

[0034] Furthermore, the axis of the bent section 12 closest to the air inlet end is perpendicular to the mounting surface of the air pipe mounting seat 2. Figure 2 As shown, the bottom surface of the trachea mounting seat 2 is the mounting surface of the trachea mounting seat 2, and the axis of the bent section 12 at the bottom of the air jet pipe 1 is perpendicular to the bottom surface of the trachea mounting seat 2, so that the connection between the air jet pipe 1 and the air path is convenient.

[0035] As an optional embodiment, refer to Figure 4 , one of the bending sections 12 is arranged horizontally, and an annular retaining ring 13 is convexly provided on the inner circumference of the bending section 12. The annular retaining ring 13 can be formed by pressing with a mold, and the whole is in a circular arc transition to reduce the air flow resistance. With the above structure, the dust entering the air injection pipe 1 when no air is injected is blocked by the annular retaining ring 13 on the side of the annular retaining ring 13 close to the nozzle, and the dust in the air injection pipe 1 is ejected with the air flow during the air injection process, thereby completely eliminating the hidden danger of dust entering the solenoid valve 4.

[0036] In this embodiment, the air jet pipe 1 can be made of metal or durable plastic material, and the air pipe mounting seat 2 can also be made of metal or plastic material.

[0037] Exemplarily, the air jet pipe 1 is made of stainless steel, copper, or plastic; And / or, the trachea mounting seat 2 is made of plastic or aluminum.

[0038] Preferably, the air jet pipe 1 is made of stainless steel, and the air pipe mounting seat 2 is made of polyurethane. Stainless steel has excellent structural strength, corrosion resistance and plasticity, which can make the air jet pipe 1 not easily damaged and easy to plastic process. Polyurethane can not only be injection molded, convenient to process, but also has good elasticity, which can meet the sealing requirements of the air inlet end of the air jet pipe 1.

[0039] Optionally, in the embodiment where the jet pipe 1 is made of a metal pipe or a plastic pipe, the jet pipe 1 can be formed by a pipe bending process; in the embodiment where the jet pipe 1 is made of plastic, the jet pipe 1 can be formed by an injection molding process; in addition, the jet pipe 1 can be formed by a multi-section pipe welding process. Compared with the multi-section pipe welding process, the pipe bending process and the injection molding process can connect two adjacent bent sections 12 through a rounded transition, which helps to reduce airflow resistance and is more convenient to manufacture.

[0040] In this embodiment, the air pipe mounting seat 2 is covered on the outside of a plurality of air injection pipes 1 by a casting process. The casting process may be an aluminum injection process or an injection molding process.

[0041] In other embodiments, the air pipe mounting seat 2 may also be a structure in which a plurality of plates are spliced ​​together, and an air jet pipe 1 is sandwiched between any two adjacent plates.

[0042] Compared with the embodiment in which the air pipe mounting seat 2 is a plurality of plate members spliced ​​together and the existing blowing air path structure, this embodiment has the following advantages: 1. It is easy to manufacture and has a low manufacturing cost; 2. The air jet 1 fits tightly with the air pipe mounting seat 2, which effectively improves the structural strength and pressure bearing capacity of the air jet 1 and avoids vibration of the air jet 1; 3. The distance between two adjacent air jet pipes 1 can be minimized, and more air jet pipes 1 can be arranged in the same space, thereby improving the accuracy of the sprayed materials.

[0043] Continue to refer to Figure 2 The air inlet end of the air jet pipe 1 and / or the air outlet end of the air jet pipe 1 extend out from the air pipe mounting seat 2.

[0044] On the basis of the above structure, a jack for inserting the air inlet end of the air jet pipe 1 and / or the air outlet end of the air jet pipe 1 is processed on the casting mold of the air pipe mounting seat 2 .

[0045] When pouring the air pipe mounting seat 2, the air inlet end of the air jet 1 and / or the air outlet end of the air jet 1 are inserted into the jack on the casting mold. This arrangement, on the one hand, can limit the position of the air jet 1 during the pouring process, so that the air jet 1 is arranged in order according to the design requirements for easy pouring, and at the same time, after the air pipe mounting seat 2 is cast and formed, the position accuracy of the air jet 1 relative to the air pipe mounting seat 2 meets the design requirements; on the other hand, it can prevent the pouring liquid from entering from the openings at both ends of the air jet 1, reducing the subsequent finishing workload.

[0046] In other embodiments, the air jet pipe 1 may also be entirely covered in the air pipe mounting seat 2 , with only the air inlet and the air outlet of the air jet pipe 1 exposed outside the air pipe mounting seat 2 .

[0047] Reference Figure 5 and Figure 6 The valve box spray air path structure also includes an air intake valve plate 3 and a plurality of solenoid valves 4 installed on the air intake valve plate 3; An air intake cavity 31 and a plurality of gas flow channels (not shown in the figure) are provided in the air intake valve plate 3. The plurality of gas flow channels are arranged in one-to-one correspondence with the plurality of gas injection pipes 1. The gas flow channels are arranged in communication between the air intake cavity 31 and the corresponding gas injection pipes 1. Each gas flow channel is connected to a solenoid valve 4 .

[0048] Specifically, the gas flow channel includes an air inlet and an air outlet, wherein: the air inlet is connected between the air inlet cavity 31 and the air inlet of the solenoid valve 4; the air outlet is connected between the air outlet of the solenoid valve 4 and the air inlet end of the air jet pipe 1. After the above-mentioned valve box air jet structure is installed, the air inlet end of each air jet pipe 1 is connected to the solenoid valve 4 respectively, so that the purpose of automatically controlling the air jet of each air jet pipe 1 can be achieved.

[0049] In this embodiment, the air inlet end of the jet pipe 1 extends from the air pipe mounting seat 2 and is plugged into the corresponding gas flow channel. The jet pipe 1 and the corresponding gas flow channel are plugged together so that the gas in the gas flow channel can enter the jet pipe 1 more smoothly.

[0050] Another aspect of the present invention provides a method for manufacturing a valve box blowing air path structure, the method comprising the following steps: According to the gas path design requirements, a jet pipe 1 of a desired shape is processed; A plurality of air injection pipes 1 are arranged along a first direction, and an air pipe mounting seat 2 covering the outside of the air injection pipes 1 is formed by a casting process.

[0051] Furthermore, the step of processing the jet pipe 1 of the required shape according to the gas path design requirements includes: Select a pipe with dimensions that meet the design requirements, process a necking structure 11 at one end of the pipe, and bend the pipe to form an air injection pipe 1; Alternatively, the air injection pipe 1 is formed by an injection molding process.

[0052] In the embodiment of using pipes as raw materials to make the jet pipe 1, the manufacturing process of the jet pipe 1 mainly includes two main processes: pipe bending and shrinking, wherein: the pipe bending process is to bend the pipe into the required shape according to the gas path design requirements; the shrinking process is to shrink the end of the pipe using a professional mold to achieve the predetermined shape requirements. It should be noted that there is no strict order between the two steps of pipe bending and shrinking, and they can be flexibly adjusted according to actual conditions.

[0053] In the embodiment in which the air injection pipe 1 is formed by injection molding, the air injection pipe 1 is formed in one step by using a dedicated mold.

[0054] As an optional embodiment, the steps include: selecting a pipe with dimensions that meet design requirements, processing a necking structure 11 at one end of the pipe, and bending the pipe to form an air injection pipe 1, and also include: pressing an annular retaining ring 13 on the pipe.

[0055] Furthermore, the step of arranging a plurality of air jet pipes 1 along the first direction includes: Insert the air inlet end of the injection pipe 1 and / or the air outlet end of the injection pipe 1 into the insertion hole on the casting mold.

[0056] Preferably, the casting mold is provided with two rows of jacks, and the air inlet end of the jet pipe 1 and the air outlet end of the jet pipe 1 are respectively inserted into the two rows of jacks on the casting mold. This arrangement can, on the one hand, limit the position of the jet pipe 1 during the casting process to facilitate casting and improve the position accuracy of the jet pipe 1 relative to the air pipe mounting seat 2; on the other hand, it can prevent the casting liquid from entering the jet pipe 1 from the openings at both ends of the jet pipe 1.

[0057] Optionally, the mounting structure 21 on the trachea mounting seat 2 can be formed during casting, or can be formed by secondary processing after the trachea mounting seat 2 is demoulded.

[0058] As an optional embodiment, after the trachea mounting seat 2 is cast and demoulded, the contact portion of the trachea mounting seat 2 with the intake valve plate 3 is processed to improve the sealing between the trachea mounting seat 2 and the intake valve plate 3 after assembly.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A valve box blowing air path structure, characterized in that: include: A plurality of air injection pipes (1) are arranged in an array along a first direction, wherein the air injection pipes (1) have an air inlet end and an air outlet end; The air pipe mounting seat (2) is coated on the outside of the plurality of air jet pipes (1) by a casting process, and a mounting structure (21) is arranged on the air pipe mounting seat (2).

2. The valve box blowing air path structure according to claim 1 is characterized in that: The gas outlet end of the gas jet pipe (1) is provided with a constriction structure (11).

3. The valve box blowing air path structure according to claim 1, characterized in that: The air jet pipe (1) comprises a plurality of bent sections (12) which are connected end to end in sequence at an angle; Any two adjacent bending sections (12) are connected via a rounded transition.

4. The valve box blowing air path structure according to claim 1, characterized in that: The air jet pipe (1) is made of stainless steel, copper, or plastic; And / or, the trachea mounting seat (2) is made of plastic or aluminum.

5. The valve box blowing air path structure according to claim 4 is characterized in that: The air jet pipe (1) is made of stainless steel, and the air pipe mounting seat (2) is made of polyurethane.

6. The valve box blowing air path structure according to claim 1, characterized in that: The air injection pipe (1) is formed by a pipe bending process or an injection molding process.

7. The valve box blowing air path structure according to claim 1, characterized in that: The air inlet end of the air jet pipe (1) and / or the air outlet end of the air jet pipe (1) protrude from the air pipe mounting seat (2).

8. The valve box spray air path structure according to any one of claims 1 to 7, characterized in that: It also includes an intake valve plate (3) and a plurality of solenoid valves (4) mounted on the intake valve plate (3); An air intake cavity (31) and a plurality of gas flow channels are provided in the air intake valve plate (3), the plurality of gas flow channels are arranged in a one-to-one correspondence with the plurality of gas injection pipes (1), and the gas flow channels are arranged in communication between the air intake cavity (31) and the corresponding gas injection pipes (1); Each of the gas flow channels is connected to and provided with a solenoid valve (4).

9. A method for manufacturing a valve box blowing air path structure, characterized in that: The following steps are involved: Processing a jet pipe (1) of a desired shape according to the design requirements of the gas path; A plurality of the air jet pipes (1) are arranged along a first direction, and an air pipe mounting seat (2) covering the outside of the air jet pipe (1) is formed by a casting process.

10. The method for manufacturing the valve box blowing air path structure according to claim 9, characterized in that: The step of processing the jet pipe (1) of a desired shape according to the gas path design requirements comprises: Selecting a pipe with dimensions that meet the design requirements, processing a necking structure (11) at one end of the pipe, and bending the pipe to form the air injection pipe (1); Alternatively, the air injection pipe (1) is formed by an injection molding process.

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