Dust diffusion pipe and dust generation diffusion device thereof

Abstract

The utility model discloses a dust diffusion pipe and a dust generation diffusion device thereof, which comprise a dust generator, a dilution air supply fan and a dust diffusion pipe, a dust outlet pipe of the dust generator is communicated with a dust-containing airflow nozzle, an air outlet of the dilution air supply fan is communicated with a dilution air inlet pipe, and the dust diffusion pipe comprises a flaring pipe section. The small-diameter end of the flaring pipe section is connected with a mixing pipe section, the mixing pipe section comprises a central pipe, communicating holes are formed in the pipe wall of the central pipe, an outer cover shell is fixedly welded to the outer portion of the central pipe, the outer cover shell and the central pipe are fixedly welded, all the communicating holes are wrapped by the outer cover shell, an air inlet cavity is formed, and a dilution air inlet pipe is arranged on the outer cover shell; a pipe end plate is detachably mounted at the upstream end of the central pipe, and a dust-containing airflow nozzle is detachably and fixedly mounted on the pipe end plate. According to the dust diffusion pipe and the dust generation diffusion device thereof, not only can dust and diluent gas be better and uniformly mixed, but also the dust-containing airflow nozzle is convenient to disassemble and replace, and the use is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of dust simulation technology, and in particular to a dust diffusion tube and its dust generation and diffusion device. Background Technology

[0002] In the field of dust simulation technology, dust generation is required, and it is generally carried out by a dust generating device. For example, the utility model patent with authorization announcement number CN216524681U discloses a dust environment simulation device. This dust simulator device includes a diffusion structure, which is used to mix the dust-laden gas emitted by the dust generating device with the diluting airflow generated by the blower and then diffuse it. However, the diffusion structure of this dust simulation device still has the following problems: 1. In this diffusion structure, the nozzle of the dust generating device needs to be inserted into the interior of the air intake manifold for fixation. Therefore, when the nozzle becomes blocked, it is difficult to replace it; 2. The blower is directly connected to the end of the air intake manifold. In order to ensure a sufficient amount of diluting gas, the airflow and velocity blown out by the blower need to meet certain requirements and be much greater than the flow rate and velocity of the dust-laden gas emitted by the dust generating device. This causes the diluting gas to directly and quickly blow the dust-laden gas into the diffusion structure. The mixing of dust and gas after dust generation is uncontrollable and uneven. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a dust diffusion tube, which not only facilitates better and more uniform mixing of dust and diluting gas, but also makes it easy to disassemble and replace the dust-laden airflow nozzle, making it more convenient to use.

[0004] Another technical problem to be solved by this utility model is to provide a dust generation and diffusion device. This dust generation and diffusion device uses the above-mentioned dust diffusion tube, which can better mix the dust and diluting gas evenly. It is also convenient to disassemble and replace the dust-laden airflow nozzle, making it more convenient to use.

[0005] To solve the first technical problem mentioned above, the technical solution of this utility model is: a dust diffusion pipe, including a flared pipe section, a mixing pipe section connected to the small-diameter end of the flared pipe section, the mixing pipe section including a central pipe connected to the small-diameter end, a plurality of connecting holes provided on the pipe wall of the central pipe, an outer cover welded and fixed to the outside of the central pipe, the outer cover welded and fixed to the central pipe and covering all the connecting holes to form an air inlet chamber, a dilution air inlet pipe communicating with the air inlet chamber provided on the outer cover, a pipe end plate detachably installed at the upstream end of the central pipe, and a dust-laden airflow nozzle detachably fixedly installed on the pipe end plate.

[0006] As a preferred embodiment, an upstream connecting flange is provided at the upstream end of the central pipe, and the pipe end plate is in sealing contact with the plate surface of the upstream connecting flange and is detachably fixed by a clamp.

[0007] As a preferred embodiment, the dilution intake pipes are multiple and evenly distributed around the central circumference of the central pipe.

[0008] As a preferred embodiment, the dilution inlet pipe is a bend, and the dilution inlet pipe is connected to the upstream end plate of the outer casing.

[0009] As a preferred embodiment, the pipe end plate is provided with a connecting screw hole at its center, and the dust-laden airflow nozzle is threaded into the connecting screw hole.

[0010] As a preferred embodiment, the central tube is a straight pipe section, and the diameter of the central tube is equal to the diameter of the smaller diameter end of the flared pipe section.

[0011] After adopting the above technical solution, the effect of this utility model is as follows: Since the small-diameter end of the flared pipe section is connected to a mixing pipe section, the mixing pipe section includes a central pipe connected to the small-diameter end. The central pipe has several communicating holes on its wall. An outer casing is welded and fixed to the outside of the central pipe. The outer casing is welded and fixed to the central pipe, enclosing all the communicating holes and forming an air inlet chamber. A dilution air inlet pipe communicating with the air inlet chamber is provided on the outer casing. A pipe end plate is detachably installed at the upstream end of the central pipe, and a dust-laden airflow nozzle is detachably fixed and fixed on the pipe end plate. Therefore, this dust diffusion pipe has at least the following advantages compared to existing structures. Advantages: 1. The design of the outer casing and central tube allows the diluent gas to enter the central tube through the air inlet chamber and connecting hole, thus stratifying the diluent gas into several streams, which better mixes with the dust-laden airflow ejected from the dust-laden airflow nozzle, resulting in a better mixing effect; 2. Both the dust-laden airflow nozzle and the tube end plate are detachable. Therefore, when the dust-laden airflow nozzle becomes clogged and needs to be replaced, the tube end plate can be removed directly before disassembling the dust-laden airflow nozzle, making disassembly more convenient. Compared with the current conventional installation method, where the nozzle is directly fixed inside the air inlet main pipe and disassembly of the nozzle is more difficult, the solution of this utility model is more convenient for disassembly, installation, and maintenance.

[0012] Furthermore, since an upstream connecting flange is provided at the upstream end of the central pipe, and the pipe end plate is in sealing contact with the plate surface of the upstream connecting flange and is detachably fixed by a clamp, the upstream connecting flange and the pipe short plate can be quickly sealed and fixed by the clamp, and disassembly and assembly are also convenient.

[0013] Furthermore, since there are multiple dilution intake pipes that are evenly distributed around the center circumference of the central pipe, the gas can be evenly introduced into the intake chamber through multiple dilution intake pipes, making the pressure of the gas entering the central pipe more balanced and the mixing effect better.

[0014] Furthermore, since the dilution air inlet pipe is a bend, and the dilution air inlet pipe is connected to the upstream end plate of the outer casing, the dilution air inlet pipe is designed as a bend to facilitate pipe connection.

[0015] Furthermore, since the pipe end plate has a connecting screw hole at its center, and the dust-laden airflow nozzle is threaded into the connecting screw hole, the dust-laden airflow nozzle is easier to disassemble, and the pipe end plate can be removed during maintenance and replacement.

[0016] To solve the second technical problem mentioned above, the technical solution of this utility model is: a dust generating and dispersing device, which further includes a dilution air supply fan and the dust diffusion pipe, wherein the dust outlet pipe of the dust generator is connected to the dust-laden airflow nozzle, and the air outlet of the dilution air supply fan is connected to the dilution air inlet pipe through an air outlet pipe.

[0017] As a preferred embodiment, the air outlet pipe is equipped with an airflow distributor, which has a plurality of air outlets, each of which is connected to the dilution air inlet pipe in a corresponding manner.

[0018] After adopting the above technical solution, the effect of this utility model is as follows: Since a dust generation and diffusion device further includes a dilution air supply fan and the dust diffusion pipe, the dust outlet pipe of the dust generator is connected to the dust-laden airflow nozzle, and the air outlet of the dilution air supply fan is connected to the dilution inlet pipe through the air outlet pipe, the dust generator can generate dust-laden gas, which is then sprayed into the central pipe through the dust-laden airflow nozzle. The dilution air supply fan supplies the dilution gas into the inlet chamber and also into the central pipe through the connecting hole. In this way, the dust and dilution gas will be fully mixed in the central pipe, and the mixed gas will then be evenly diffused through the flared pipe section, thereby meeting the requirements for uniform dust generation and diffusion. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a three-dimensional structural view of an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the end face of an embodiment of the present utility model;

[0022] Figure 3 yes Figure 2 Sectional view at AA;

[0023] Figure 4 yes Figure 3 An enlarged view at point B;

[0024] Figure 5 This is a perspective view of the dust generation and diffusion device according to an embodiment of the present invention;

[0025] Figure 6 This is a perspective view of the dust generation and diffusion device according to an embodiment of the present invention from another angle;

[0026] In the attached diagram: 1. Flared pipe section; 2. Outer casing; 3. Pipe end plate; 4. Central pipe; 5. Dilution air inlet pipe; 6. Dust-laden airflow nozzle; 7. Connecting hole; 8. Air inlet chamber; 9. Clamp; 10. Dust generator; 11. Dilution air supply fan; 12. Airflow distributor; 13. Air outlet pipe. Detailed Implementation

[0027] The present invention will be further described in detail below through specific embodiments.

[0028] like Figures 1 to 6 As shown, a dust diffusion pipe includes a flared pipe section 1, the small-diameter end of which is connected to a mixing pipe section. The mixing pipe section includes a central pipe 4 connected to the small-diameter end. The central pipe 4 has several connecting holes 7 on its wall. An outer casing 2 is welded and fixed to the outside of the central pipe 4. The outer casing 2 is welded and fixed to the central pipe 4 and encloses all the connecting holes 7 to form an air intake chamber 8. The outer casing 2 consists of an outer pipe, an upstream end plate, and a downstream end plate. The upstream end plate and the downstream end plate have a central hole, which is fitted onto the outer wall of the central pipe 4 and welded and fixed.

[0029] The outer casing 2 is provided with a dilution air inlet pipe 5 communicating with the air inlet chamber 8. A pipe end plate 3 is detachably installed at the upstream end of the central pipe 4, and a dust-laden airflow nozzle 6 is detachably fixedly installed on the pipe end plate 3. There are multiple dilution air inlet pipes 5, evenly distributed around the center circumference of the central pipe 4. Preferably, the dilution air inlet pipe 5 is located on the upstream end plate, thus ensuring axial air intake, consistent with the blowing direction of the dust-laden airflow nozzle 6.

[0030] An upstream connecting flange is provided at the upstream end of the central pipe 4. The pipe end plate 3 is in sealing contact with the plate surface of the upstream connecting flange and is detachably fixed by a clamp 9. A sealing ring is provided between the pipe end plate 3 and the upstream connecting flange. After the clamp 9 fixes the two, it will squeeze the sealing ring to achieve a sealing fit.

[0031] The dilution air inlet pipe 5 is a bent pipe. The dilution air inlet pipe 5 is connected to the upstream end plate of the outer casing 2 and extends outward, which facilitates the connection between the dilution air inlet pipe 5 and the air outlet pipe 13.

[0032] like Figure 4 As shown, the end plate 3 has a connecting screw hole at its center, and the dust-laden airflow nozzle 6 is threaded into the connecting screw hole. The central pipe 4 is a straight pipe section, and the diameter of the central pipe 4 is equal to the diameter of the small diameter end of the flared pipe section 1. There are multiple connecting holes 7, which are evenly distributed on the pipe wall of the central pipe 4.

[0033] like Figure 5 and Figure 6 As shown in the attached diagram, a dust generation and diffusion device is included, comprising a dilution air supply fan 11 and the aforementioned dust diffusion pipe. The dust outlet pipe of the dust generator 10 is connected to the dust-laden airflow nozzle 6, and the air outlet of the dilution air supply fan 11 is connected to the dilution air inlet pipe 5 via an air outlet pipe 13. An airflow distributor 12 is provided on the air outlet pipe 13, and the airflow distributor 12 is provided with a plurality of air outlets, each of which is connected to the dilution air inlet pipe 5 in a one-to-one correspondence.

[0034] The airflow distributor 12 includes a distribution cylinder with multiple air outlets. In this embodiment, there are six dilution inlet pipes 5, and correspondingly, there are also six air outlets on the distribution cylinder. Each air outlet is connected to a dilution inlet pipe 5 through an air outlet pipe 13.

[0035] In this embodiment, the dust generator 10 is an existing structure. The specific structure is described in detail in the applicant's previous patent application, number CN201320205310.8, and will not be described in detail here.

[0036] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications and alterations to the technical solution of the present utility model without departing from its design spirit shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. A dust diffusion pipe, comprising a flared pipe section, characterized in that: The small-diameter end of the flared pipe section is connected to a mixing pipe section, which includes a central pipe connected to the small-diameter end. The central pipe has several connecting holes on its wall. An outer casing is welded and fixed to the outside of the central pipe. The outer casing is welded and fixed to the central pipe and encloses all the connecting holes to form an air intake chamber. A dilution air intake pipe communicating with the air intake chamber is provided on the outer casing. A pipe end plate is detachably installed at the upstream end of the central pipe, and a dust-laden airflow nozzle is detachably fixed on the pipe end plate.

2. A dust diffusion tube as described in claim 1, characterized in that: An upstream connecting flange is provided at the upstream end of the central pipe, and the pipe end plate is in sealing contact with the plate surface of the upstream connecting flange and is detachably fixed by a clamp.

3. A dust diffusion tube as described in claim 2, characterized in that: The number of dilution intake pipes is multiple and they are evenly distributed around the center circumference of the central pipe.

4. A dust diffusion tube as described in claim 3, characterized in that: The dilution air inlet pipe is a bent pipe, and the dilution air inlet pipe is connected to the upstream end plate of the outer casing.

5. A dust diffusion tube as described in claim 4, characterized in that: The tube end plate has a connecting screw hole at its center, and the dust-laden airflow nozzle is threaded into the connecting screw hole.

6. A dust diffusion tube as described in claim 1, characterized in that: The central tube is a straight section, and the diameter of the central tube is equal to the diameter of the small-diameter end of the flared section.

7. A dust generation and diffusion device, comprising a dust generator, characterized in that: It also includes a dilution air supply fan and a dust diffusion pipe as described in any one of claims 1 to 6, wherein the dust outlet pipe of the dust generator is connected to the dust-laden airflow nozzle, and the air outlet of the dilution air supply fan is connected to the dilution air inlet pipe through an air outlet pipe.

8. The dust generation and diffusion device as described in claim 7, characterized in that: An airflow distributor is provided on the air outlet pipe, and the airflow distributor is provided with a number of air outlets, each of which is connected to the dilution air inlet pipe.

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