A horizontal wind tunnel for a dust environment simulation device

Abstract

The present invention discloses a horizontal wind tunnel for a dust environment simulation device, which includes a mixing and uniform distribution structure. An upstream of the mixing and uniform distribution structure is connected to a sleeved conical compression and diffusion structure in series. A downstream of the mixing and uniform distribution structure is connected to a converging structure. A window is provided on the mixing and uniform distribution structure. A large end of the conical compression and diffusion structure is connected to the mixing and uniform distribution structure, and a small end of the conical compression and diffusion structure is connected to an air inlet and dust inlet assembly. It is realized that the dust-containing gas is first concentrated in the small-area conical compression and diffusion structure, and then dispersed and diffused into the mixing and uniform distribution structure, with high distribution and diffusion uniformity and high calibration accuracy for the dust concentration detection instrument to be calibrated.

Description

Technical Field

[0001] The present invention belongs to the technical field of dust environment simulation, and particularly relates to a horizontal wind tunnel for a dust environment simulation device. Background Art

[0002] At present, the calibration of dust concentration detection instruments is mostly completed through dust environment simulation equipment. To simulate the generation and distribution of dust, a horizontal wind tunnel is required. Currently, the dust generation device in the horizontal wind tunnel needs to first form simulated powders such as pulverized coal into blocks, and then install the blocks on the adjustment mechanism. During operation, through the cooperation of brushes, the adjustment mechanism, and air intake, the dust is diffused and transported to the component where the dust concentration detection instrument to be detected / calibrated is installed. Using this method, the distribution and diffusion uniformity of the diffused simulated powder are poor, which will affect the calibration / accuracy of the dust concentration detection instrument. Summary of the Invention

[0003] The present invention provides a horizontal wind tunnel for a dust environment simulation device, aiming to improve the diffusion and distribution uniformity of simulated dust and ensure the calibration / accuracy of the dust concentration detection instrument.

[0004] To solve the above technical problems, the technical solution of the present invention is: a horizontal wind tunnel for a dust environment simulation device, including a mixing and uniform distribution structure, the upstream of the mixing and uniform distribution structure is connected to a sleeved conical compression and diffusion structure, the downstream of the mixing and uniform distribution structure is connected to a converging structure, and a window is provided on the mixing and uniform distribution structure;

[0005] The large end of the conical compression and diffusion structure is connected to the mixing and uniform distribution structure, and the small end of the conical compression and diffusion structure is connected to an air intake and dust intake assembly.

[0006] As an improvement, the conical compression and diffusion structure includes an outer cone installed on the mixing and uniform distribution structure, an inner cone is sleeved inside the outer cone, a diffusion channel is formed between the outer cone and the inner cone, and a plurality of support connecting plates are annularly arranged between the outer cone and the inner cone at both ends;

[0007] The space formed between two adjacent support connecting plates is connected to the mixing and uniform distribution structure and the air intake and dust intake assembly.

[0008] As a further improvement, one end of the inner cone close to the air intake and dust intake assembly is set to a tip, and the inner cone is a closed hollow structure; one end of the outer cone close to the air intake and dust intake assembly is set to a flat end and is arranged together with the air intake and dust intake assembly.

[0009] As a further improvement, the air intake and dust intake assembly includes an air intake main pipe that is communicated with the diffusion channel and connected to the flat end of the outer cone body. An inclined dust intake pipe is arranged on one side of the air intake main pipe, and the dust intake pipe extends into the air intake main pipe and is communicated with each other.

[0010] As a further improvement, the mixing and uniform distribution structure includes a mixing cylinder with a mixing cavity and a conical change structure. The large end of the mixing cylinder is communicated with a uniformly distributed cylinder extending with the same diameter, and the small end is provided with a mounting plate. The outer cone body is mounted on the mounting plate; a feed hole corresponding to the inner cone body is provided on the mounting plate, and the diffusion channel is communicated with the mixing cavity through the feed hole.

[0011] As a further improvement, a plurality of annularly arranged air supplement holes are provided on the mounting plate located on the periphery of the outer cone body, and the air supplement holes are communicated with the mixing cavity.

[0012] As a further improvement, a plurality of annularly arranged air supplement holes are provided on the mounting plate located on the periphery of the outer cone body, and the air supplement holes are communicated with the mixing cavity.

[0013] As a further improvement, the uniformly distributed cylinder is assembled by multiple sections of cylinders, and a detection sensor and a maintenance door are installed on the cylinder; the window is also arranged on the cylinder.

[0014] As a further improvement, the converging structure is a converging cylinder with a conical change. The large end of the converging cylinder is communicated with the uniformly distributed cylinder, and the small end of the converging cylinder is communicated with a connecting cylinder with the same diameter.

[0015] As a further improvement, the axial centerlines of the connecting cylinder, the converging cylinder, the mixing cylinder, the uniformly distributed cylinder, the air intake main pipe and the outer cone body are collinearly arranged.

[0016] After adopting the above technical solutions, the effects of the present invention are as follows:

[0017] Since the horizontal wind tunnel for the dust environment simulation device includes a mixing and uniform distribution structure, a sleeved conical compression and diffusion structure is connected upstream of the mixing and uniform distribution structure, and a converging structure is connected downstream of the mixing and uniform distribution structure. There is a window on the mixing and uniform distribution structure. The large end of the conical compression and diffusion structure is connected to the mixing and uniform distribution structure, and the small end of the conical compression and diffusion structure is connected to an air intake and dust intake assembly. Based on the above structure, during the operation of the horizontal wind tunnel for the dust environment simulation device, the dust generating device sends simulated dust with an appropriate concentration into the air intake and dust intake assembly. Then, the air intake and dust intake assembly sends simulated dust such as pulverized coal into the conical compression and diffusion structure, and the conical compression and diffusion structure compresses the dust-containing gas in a small area. Then, it diffuses into the mixing and uniform distribution structure for uniform mixing and dispersion. Then, the calibration / verification of the dust concentration detection instrument to be calibrated / verified installed on the window is completed. Then, the converging structure is used to converge the dust-containing gas for subsequent treatment of the dust-containing gas.

[0018] In summary, by using the horizontal wind tunnel for the dust environment simulation device, the dust-containing gas is first concentrated in the small-area conical compression and diffusion structure, and then dispersed and diffused into the mixing and uniform distribution structure, with high distribution and diffusion uniformity and high calibration / verification accuracy for the dust concentration detection instrument to be calibrated / verified.

[0019] Since the conical compression and diffusion structure includes an outer cone installed on the mixing and uniform distribution structure, an inner cone is sleeved inside the outer cone, and a diffusion channel is formed between the outer cone and the inner cone. A plurality of support connecting plates are annularly arranged between the outer cone and the inner cone at both ends. The space formed between two adjacent support connecting plates is connected to the mixing and uniform distribution structure and the air intake and dust intake assembly. Thus, the outer cone and the inner cone are fixedly connected through the support connecting plates, and the dust-containing gas enters and exits through the diffusion channel. At the same time, the dust-containing gas is compressed in a small area through the diffusion channel and diffused into the mixing and uniform distribution structure. The structure is simple and ingenious, laying a foundation for the uniform distribution and diffusion of the dust-containing gas.

[0020] Since one end of the inner cone close to the air intake and dust intake assembly is set as a tip, and the inner cone is a closed hollow structure; one end of the outer cone close to the air intake and dust intake assembly is set as a flat end and is arranged together with the air intake and dust intake assembly, which is not only beneficial to the installation of the air intake and dust intake assembly but also beneficial to the conveyance of the dust-containing gas; since the inner cone is a closed hollow structure, it has a simple structure, light weight, and can effectively prevent simulated dust from entering the inner cone.

[0021] Since the air intake and dust intake assembly includes an air intake main pipe that communicates with the diffusion channel and is connected to the flat end of the outer cone, and an inclined dust intake main pipe is provided on one side of the air intake pipe. The dust intake pipe extends into the air intake main pipe and communicates with each other. Thus, air supply is carried out through the air intake main pipe, and the simulated dust generated by the pulsed dust generating device is sent into the air intake main pipe through the dust intake pipe. The simulated dust is sent into the diffusion channel through the continuous air supply of the air intake main pipe. The structure is simple, and the feeding effect of the simulated dust is good. Since the dust intake pipe is inclined on the air intake pipe, the simulated dust is fed in the gas conveying direction through this structure, which is beneficial to the mixing of gas and simulated dust.

[0022] Since the mixing and uniform distribution structure includes a mixing cylinder with a mixing cavity and a conical change structure. The large end of the mixing cylinder is connected to a uniformly distributed cylinder with equal diameter extension, and the small end is provided with a mounting plate. The outer cone is mounted on the mounting plate. The mounting plate is provided with a feeding hole corresponding to the inner cone, and the diffusion channel communicates with the mixing cavity through the feeding hole. Thus, through the combined structure of the mixing cylinder and the mounting plate, it is not only convenient for the installation of the air intake and dust intake assembly, but also does not affect the entry and output of the simulated dust and gas into the uniformly distributed cylinder. Since the mixing cylinder is set as a conical change structure and the mounting plate is arranged at the small end of the mixing cylinder, through the conical change structure of the mixing cylinder, the mixed simulated dust and gas enter the mixing cylinder and the uniformly distributed cylinder for a transitional step-by-step diffusion from a small area to a large area, which is beneficial to ensuring the uniformity of diffusion and distribution.

[0023] Since there are multiple annularly arranged air supplement holes on the mounting plate located outside the outer cone, and the air supplement holes communicate with the mixing cavity. Thus, after the mixed simulated dust and gas enter the mixing cavity through the diffusion channel, gas is input into the mixing cavity through the annularly distributed air supplement holes (a suction fan is provided on the dust environment simulation device. When the suction fan works, the gas will be introduced into the mixing cavity through the air supplement holes), which is beneficial to improving the uniformity of the distribution and diffusion of the simulated dust.

[0024] Since the uniformly distributed cylinder is assembled by multiple sections of cylinders, and the cylinders are provided with detection sensors and maintenance doors installed. Windows are also arranged on the cylinders. The structure is simple, the forming of the uniformly distributed cylinder is convenient, and it is convenient for maintenance and the installation of detection sensors, etc.

[0025] Since the converging structure is a converging cylinder with a conical change. The large end of the converging cylinder communicates with the uniformly distributed cylinder, and the small end of the converging cylinder is connected to a connecting cylinder with equal diameter. The structure is simple, and the converging effect on the dust-containing gas is good. At the same time, it is beneficial to the transitional connection with the downstream dust-containing gas treatment equipment through the connecting cylinder.

[0026] Since the axial centerlines of the connecting cylinder, the converging cylinder, the mixing cylinder, the uniformly distributed cylinder, the air intake main pipe and the outer cone are collinearly arranged, the horizontal layout of the horizontal wind tunnel of the dust environment simulation device is realized, which is beneficial to the transportation and uniform distribution of the dust-containing gas. Brief Description of the Drawings

[0027] The present invention will be further described below in conjunction with the drawings and embodiments.

[0028] Figure 1 is a schematic structural diagram of the present invention;

[0029] Figure 2 is Figure 1 a schematic diagram of the combined structure of the mixing and uniform distribution structure, the conical compression and diffusion structure, and the air intake and dust intake assembly in

[0030] Figure 3 is Figure 2 a schematic diagram of the structure in removing the outer cone and the air intake and dust intake assembly;

[0031] Figure 4 is Figure 2 a side view (from the side of the air intake and dust intake assembly) of ;

[0032] Figure 5 is Figure 4 an enlarged view of A in ;

[0033] Figure 6 is Figure 2 a sectional view of ;

[0034] Figure 7 is Figure 6 an enlarged view of B in ;

[0035] Among them, 1 - mixing and uniform distribution structure; 101 - mixing chamber; 102 - mixing cylinder; 103 - mounting plate; 104 - feed hole; 2 - conical compression and diffusion structure; 201 - outer cone; 202 - inner cone; 203 - diffusion channel; 204 - support connecting plate; 3 - air intake and dust intake assembly; 301 - main air intake pipe; 302 - dust intake pipe; 4 - air supplement hole; 5 - uniform distribution cylinder; 501 - window; 502 - inspection door; 6 - converging structure; 601 - converging cylinder; 602 - connecting cylinder. Detailed Description of the Preferred Embodiments

[0036] The present invention will be further described in detail below through specific embodiments.

[0037] Such as Figure 1 , Figure 2 , Figures 6 to 7As commonly shown, a horizontal wind tunnel for a dust environment simulation device includes a mixing and uniform distribution structure 1. The upstream of the mixing and uniform distribution structure 1 is connected to a sleeved conical compression and diffusion structure 2, and the downstream of the mixing and uniform distribution structure 1 is connected to a converging structure 6. A window 501 for installing a dust concentration detection instrument to be inspected / calibrated is provided on the mixing and uniform distribution structure 1. The large end of the conical compression and diffusion structure 2 is connected to the mixing and uniform distribution structure 1, and the small end of the conical compression and diffusion structure 2 is connected to an air inlet and dust inlet assembly 3.

[0038] As Figures 2 to 7 As commonly shown, the conical compression and diffusion structure 2 includes an outer cone 201 installed on the mixing and uniform distribution structure 1. An inner cone 202 is sleeved inside the outer cone 201. A diffusion channel 203 is formed between the outer cone 201 and the inner cone 202. A plurality of support connecting plates 204 are annularly arranged between the outer cone 201 and the inner cone 202 at both ends. The space formed between two adjacent support connecting plates 204 is connected to the mixing and uniform distribution structure 1 and the air inlet and dust inlet assembly 3. In this solution, the inner cone 202 is a closed hollow structure; there are 3 support connecting plates 204 and they are annularly arrayed; the end of the inner cone 202 close to the air inlet and dust inlet assembly 3 is set as a tip, and the end of the outer cone 201 close to the air inlet and dust inlet assembly 3 is set as a flat end and is arranged together with the air inlet and dust inlet assembly 3.

[0039] The air inlet and dust inlet assembly 3 includes an air inlet main pipe 301 connected to the diffusion channel 203 and connected to the flat end of the outer cone 201. A dust inlet pipe 302 is provided on one side of the air inlet main pipe 301. The dust inlet pipe 302 extends into the air inlet main pipe 301 and is interconnected. As a preference, the dust inlet pipe 302 is inclined on the air inlet main pipe 301, and the smaller the inclination angle of the dust inlet pipe 302 is, the better (see Figure 5 ).

[0040] The mixing and uniform distribution structure 1 includes a mixing cylinder 102 having a mixing chamber 101. One end of the mixing cylinder 102 is through, and the other end is provided with a mounting plate 103. The outer cone 201 is installed on the mounting plate 103. A feed hole 104 corresponding to the inner cone 202 is provided on the mounting plate 103. The diffusion channel 203 is connected to the mixing chamber 101 through the feed hole 104 and the space formed between two adjacent support connecting plates 204. As a preference, the mixing cylinder 102 is set as a conical variable structure, the mounting plate 103 is arranged at the small end of the mixing cylinder 102 (see Figure 2 and Figure 6 ), and the large end of the mixing cylinder 102 is connected to a uniformly distributed cylinder 5 with equal diameter extension.

[0041] In this solution, a plurality of air supplement holes 4 arranged in an annular array are provided on the mounting plate 103 located on the periphery of the outer cone 201, and the air supplement holes 4 communicate with the mixing chamber 101; the air supplement holes 4 are preferably long holes; the inner wall of the outer cone 201 and the outer wall of the inner cone 202 are both coated with a coating to prevent dust adhesion.

[0042] The uniform distribution cylinder 5 is assembled by multiple sections of cylinders, and a detection sensor (not shown in the figure) and a maintenance door 502 are installed on the cylinder; the window 501 is also arranged on the cylinder.

[0043] The converging structure 6 is a converging cylinder 601 with a tapered change. The large end of the converging cylinder 601 communicates with the uniform distribution cylinder 5, and the small end of the converging cylinder 6 communicates with an equal-diameter connecting cylinder 602; the axial centerlines of the connecting cylinder 602, the converging cylinder 601, the mixing cylinder 102, the uniform distribution cylinder 5, the intake main pipe 301, and the outer cone 201 are collinear.

[0044] The above-described embodiments are only descriptions of the preferred embodiments of the present invention and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and modifications made to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A horizontal wind tunnel for a dust environment simulation device, characterized in that: It includes a mixing and uniform distribution structure, upstream of which is connected with a sleeved conical compression and diffusion structure, and downstream of which is connected with a converging structure. There is a window on the mixing and uniform distribution structure. The large end of the conical compression and diffusion structure is connected with the mixing and uniform distribution structure, and the small end of the conical compression and diffusion structure is connected with an air inlet and dust inlet assembly. The conical compression and diffusion structure includes an outer cone installed on the mixing and uniform distribution structure. An inner cone is sleeved inside the outer cone. A diffusion channel is formed between the outer cone and the inner cone. A plurality of support connecting plates are annularly arranged between the outer cone and the inner cone at both ends. The space formed between two adjacent support connecting plates is connected with the mixing and uniform distribution structure and the air inlet and dust inlet assembly. One end of the inner cone close to the air inlet and dust inlet assembly is set as a tip, and the inner cone is a closed hollow structure. One end of the outer cone close to the air inlet and dust inlet assembly is set as a flat end and is arranged together with the air inlet and dust inlet assembly. The mixing and uniform distribution structure includes a mixing cylinder with a mixing cavity and a conical change structure. The large end of the mixing cylinder is connected with a uniformly distributed cylinder with equal diameter extension, and the small end is provided with a mounting plate. The outer cone is installed on the mounting plate. There is a feed hole corresponding to the inner cone on the mounting plate. The diffusion channel is connected with the mixing cavity through the feed hole. A plurality of annularly arranged air supplement holes are provided on the mounting plate outside the outer cone, and the air supplement holes are connected with the mixing cavity. The air inlet and dust inlet assembly includes an air inlet main pipe connected with the diffusion channel and connected with the flat end of the outer cone. An inclined dust inlet pipe is arranged on one side of the air inlet main pipe. The dust inlet pipe extends into the air inlet main pipe and is interconnected.

2. The horizontal wind tunnel for a dust environment simulation device according to claim 1, characterized in that: The uniformly distributed cylinder is assembled by multiple sections of cylinders. A detection sensor and a maintenance door are installed on the cylinder. The window is also arranged on the cylinder.

3. The horizontal wind tunnel for a dust environment simulation device according to claim 2, characterized in that: The converging structure is a converging cylinder with a conical change. The large end of the converging cylinder is connected with the uniformly distributed cylinder, and the small end of the converging cylinder is connected with an equal-diameter connecting cylinder.

4. The horizontal wind tunnel for a dust environment simulation device according to claim 3, characterized in that: The axial centerlines of the connecting cylinder, the converging cylinder, the mixing cylinder, the uniformly distributed cylinder, the air inlet main pipe and the outer cone are collinearly arranged.

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