Expansion joint capable of realizing vacuum dust removal and particle silicon conveying device
By using elastic non-metallic materials and dust removal structures in the expansion joint, the problems of silicon powder generation and wear of inner lining components during the conveying of particulate silicon were solved, achieving the effect of low silicon powder production and low maintenance costs.
Patent Information
- Application Number
- CN202521055911.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-27
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-05-27
AI Technical Summary
Existing expansion joints are prone to generating silicon powder during the conveying of particulate silicon, and the inner lining is easily worn, affecting product quality and equipment maintenance costs.
Expansion joints made of elastic non-metallic materials such as pure polyurethane or silicone are equipped with dust removal air inlets and vacuum dust removal outlets. Silicone powder is removed through vacuum dust removal, and the elasticity and flexibility of polyurethane or silicone are used to improve the durability and adaptability of the expansion joints.
It effectively removes silicon powder, reduces the silicon powder content in products, extends the service life of expansion joints, reduces equipment maintenance costs, and ensures product quality.
Smart Images
Figure CN223935162U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an expansion joint, specifically to an expansion joint capable of vacuum dust removal and a particle silicon conveying device. Background Technology
[0002] Due to the presence of silicon powder on the surface of granular silicon, granular silicon products require a powder removal device for de-powdering before packaging. The de-powdered granular silicon is then transported via pipeline to the packaging process. In related technologies, the conveying pipeline used to transport the de-powdered silicon is connected to the product packaging container via an expansion joint. The expansion joint only serves to connect the conveying pipeline and the product packaging container to allow the granular silicon to flow from the conveying pipeline into the product packaging container. Therefore, this related technology has at least the following two problems:
[0003] On the one hand, although the granular silicon product has been de-dusted by the dust removal device, the granular silicon inevitably collides with the inner wall of the pipe during the flow process. This collision generates new silicon powder, which increases the silicon powder content in the granular silicon and reduces the dust removal effect.
[0004] On the other hand, the expansion joints currently used consist of a metal expansion joint shell and an inner liner inside the shell. This inner liner is made of silicon nitride, which is highly susceptible to wear under the impact of particulate silicon products, leading to exposure of the inner side of the metal shell, affecting product quality and hindering quality control. To minimize the risk of product contamination, operators need to conduct regular inspections and repairs, and may even need to replace the inner liner or the entire expansion joint, resulting in high equipment maintenance costs. Furthermore, the metal expansion joint shell has a narrow range of motion and is easily deformed and difficult to restore.
[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content
[0006] Purpose of the utility model: The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a vacuum dust removal expansion joint and a particle silicon conveying device. After the particle silicon passes through the vacuum dust removal expansion joint, the silicon powder generated by collision or mutual friction in the pipeline is removed, thereby ensuring a low silicon powder content of the particle silicon entering the product packaging container.
[0007] To solve the above-mentioned technical problems, the first aspect of this utility model discloses an expansion joint capable of vacuum dust removal, the expansion joint comprising:
[0008] The expansion joint body includes a feed end and a discharge end;
[0009] A feed port connecting flange is connected to the feed end of the expansion joint body;
[0010] And the discharge port connecting flange connected to the discharge end of the expansion joint body;
[0011] The expansion joint body has a dust removal gas inlet on the side near the discharge port connecting flange and a vacuum dust removal outlet on the side near the feed port connecting flange. The feed port connecting flange is equipped with a discharge pipe, and the discharge port of the discharge pipe extends into the expansion joint body and is located below the vacuum dust removal outlet.
[0012] Furthermore, the expansion joint body, the inlet connecting flange, the outlet connecting flange, and the discharge pipe are integrally cast from an elastic non-metallic material.
[0013] Specifically, the elastic non-metallic material is pure polyurethane or silicone.
[0014] Preferably, the air intake direction of the dust removal gas inlet is inclined upward.
[0015] Specifically, the expansion joint body includes a first connecting pipe section for connecting to the feed port connecting flange, a second connecting pipe section for connecting to the discharge port connecting flange, and a corrugated pipe section, wherein the corrugated pipe section connects the first connecting pipe section and the second connecting pipe section; the dust removal gas inlet is located in the second connecting pipe section, and the vacuum dust removal outlet is located in the first connecting pipe section.
[0016] Specifically, the feed pipe portion extending into the expansion joint body includes a funnel pipe section and a guide straight pipe section connected to the small-diameter end of the funnel pipe section. The outlet of the guide straight pipe section is located below the vacuum dust removal outlet, so that the feed port of the feed pipe extends into the expansion joint body and is located below the vacuum dust removal outlet.
[0017] Specifically, the straight guide pipe section is arranged parallel to the extension direction of the expansion joint body.
[0018] Furthermore, the expansion joint also includes a dust removal gas inlet plug and a vacuum dust removal outlet plug. The dust removal gas inlet plug can block the dust removal gas inlet; the vacuum dust removal outlet plug can block the vacuum dust removal outlet; the sealing connection between the dust removal gas inlet plug and the dust removal gas inlet and the vacuum dust removal outlet plug and the vacuum dust removal outlet are both plug-type connections or threaded connections.
[0019] Furthermore, the expansion joint includes a first threaded hole and a second threaded hole, the inlet connecting flange is provided with the first threaded hole, and the outlet connecting flange is provided with the second threaded hole.
[0020] Another aspect of this invention provides a particulate silicon conveying device, which includes any of the vacuum-removable expansion joints described above.
[0021] Beneficial effects:
[0022] 1. This utility model, by adding a dust-removing gas inlet and a vacuum dust-removing outlet, enables the expansion joint to also function as a dust removal device. After the granular silicon passes through this vacuum dust-removing expansion joint, the silicon powder generated by collisions or friction between granular silicon particles in the pipeline is removed, thereby ensuring a low silicon powder content of the granular silicon particles entering the product packaging container.
[0023] 2. Use pure polyurethane or silicone material to cast the integrated expansion joint to prevent contamination from metal parts. Because the pipeline contains some pressure during normal production, when the expansion joint ruptures, silica powder or small particles may escape, accompanied by noise, making it easy to detect during inspections.
[0024] 3. Utilize the elasticity of polyurethane or silicone to reduce the erosion of the expansion joint by materials, thereby improving the service life of the expansion joint.
[0025] 4. Utilize the flexibility of polyurethane or silicone to improve the assembly range of expansion joints.
[0026] 5. The expansion joint of this utility model can be used in the production and processing system of granular silicon and seed crystals, such as granular silicon conveying device. Attached Figure Description
[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.
[0028] Figure 1 A schematic diagram of the internal structure of a vacuum-resistant expansion joint provided for a first aspect of the first embodiment of this utility model.
[0029] Figure 2 for Figure 1 The top view of the expansion joint shown.
[0030] The accompanying labeling is as follows:
[0031] 100. Expansion joint body; 110. Feeding end; 120. Discharge end; 130. Dust removal gas inlet; 140. Vacuum dust removal outlet; 150. First connecting pipe section; 160. Second connecting pipe section; 170. Corrugated pipe section; 200. Feeding port connecting flange; 210. First screw hole; 300. Discharge port connecting flange; 310. Second screw hole; 400. Feeding pipe; 410. Feeding port; 420. Funnel pipe section; 430. Guide straight pipe section; 500. Dust removal gas inlet plug; 600. Vacuum dust removal outlet plug. Detailed Implementation
[0032] Example 1
[0033] The first aspect of this embodiment provides a vacuum dust removal expansion joint, which includes: an expansion joint body 100, including a feed end 110 and a discharge end 120; a feed port connecting flange 200 connected to the feed end 110 of the expansion joint body 100; and a discharge port connecting flange 300 connected to the discharge end 120 of the expansion joint body 100; a dust removal gas inlet 130 is provided on the side of the expansion joint body 100 near the discharge port connecting flange 300, and a vacuum dust removal outlet 140 is provided on the side of the expansion joint body 100 near the feed port connecting flange 200; a discharge pipe 400 is installed on the feed port connecting flange 200, and the discharge port 410 of the discharge pipe 400 extends into the expansion joint body 100 and is located below the vacuum dust removal outlet 140.
[0034] In use, the inlet flange 200 is connected to the discharge flange of the conveying pipeline, and the outlet flange 300 is connected to the inlet flange of the product packaging container. Remove the dust removal gas inlet plug 500 and the vacuum dust removal outlet plug 600. Connect the dust removal gas inlet 130 to the dust removal gas source, and connect the vacuum dust removal outlet 140 to the external negative pressure pipeline. The dust removal gas can be an inert gas, preferably nitrogen.
[0035] When dust removal is required, the dust removal air source and negative pressure pipeline are activated. The dust removal air is blown obliquely upward from the dust removal air inlet 130 into the expansion joint body 100, carrying away the floating powder generated during the falling of the silicon particles. The blown silicon powder is sucked out from the vacuum dust removal outlet 140 at the top of the expansion joint, thereby achieving the purpose of removing silicon powder.
[0036] This invention ensures that the silicon particles do not reach the vacuum dust removal outlet 140 within the expansion joint by setting the discharge port 410 of the discharge pipe 400 below the vacuum dust removal outlet 140, thereby preventing the silicon particles from being carried away.
[0037] Furthermore, the expansion joint body 100, the inlet connecting flange 200, the outlet connecting flange 300, and the discharge pipe 400 are integrally cast from elastic non-metallic materials.
[0038] This embodiment uses pure polyurethane or silicone material to cast an integral expansion joint, eliminating contamination from metal objects in the expansion joint; the elasticity of polyurethane or silicone reduces the erosion of the expansion joint by materials, which helps to improve the service life of the expansion joint; and the flexibility of polyurethane or silicone improves the compatibility of the expansion joint with the corresponding docking equipment.
[0039] Specifically, the elastic non-metallic material is pure polyurethane or silicone.
[0040] Preferably, the air intake direction of the dust removal gas inlet 130 is inclined upward. In one example, the dust removal gas inlet 130 is connected to a dust removal gas inlet pipe, which is inclined upward.
[0041] Specifically, the expansion joint body 100 includes a first connecting pipe section 150 for connecting to the inlet flange 200, a second connecting pipe section 160 for connecting to the outlet flange 300, and a bellows section 170, the bellows section 170 connecting the first connecting pipe section 150 and the second connecting pipe section 160; a dust removal gas inlet 130 is opened in the second connecting pipe section 160, and a vacuum dust removal outlet 140 is opened in the first connecting pipe section 150. Preferably, as shown... Figure 1 As shown, the first connecting pipe section 150 and the second connecting pipe section 160 are both straight pipe sections.
[0042] Specifically, the feed pipe portion extending into the expansion joint body 100 includes a funnel pipe section 420 and a guide straight pipe section 430 connected to the small diameter end of the funnel pipe section 420. The outlet of the guide straight pipe section 430 is located below the vacuum dust removal outlet 140, so that the feed port 410 of the feed pipe 400 extends into the expansion joint body 100 and is located below the vacuum dust removal outlet 140.
[0043] In this embodiment, after the silicon particles fall into the funnel tube section 420, the funnel tube section 420 plays a guiding role. When it is only used as an expansion joint and the dust removal function is not activated, it reduces the wear of the silicon particles on the internal material of the expansion joint. When the dust removal function is activated, it ensures that the internal silicon particles will not be sucked away by the negative pressure pipe through the vacuum dust removal outlet 140.
[0044] Specifically, the straight guide pipe section 430 is arranged parallel to the extension direction of the expansion joint body 100.
[0045] The parallel extension direction of the straight guide pipe section 430 to the expansion joint body 100 ensures that the straight guide pipe section 430 is not affected by the installation angle of the expansion joint, thus ensuring the smoothness of material discharge.
[0046] Furthermore, the expansion joint also includes a dust removal gas inlet plug 500, which can block the dust removal gas inlet 130.
[0047] Furthermore, the expansion joint also includes a vacuum dust removal outlet plug 600, which can seal the vacuum dust removal outlet 140.
[0048] When the dust removal gas inlet 130 and the vacuum dust removal outlet 140 are respectively equipped with corresponding plugs, the expansion joint in this example can be used as an expansion joint on its own. The plug installation method can be plug type, threaded type, etc., depending on the working conditions.
[0049] Furthermore, the expansion joint includes a first screw hole 210 and a second screw hole 310, the feed port connecting flange 200 is provided with the first screw hole 210, and the discharge port connecting flange 300 is provided with the second screw hole 310.
[0050] In use, the feed port connecting flange 200 is connected to the corresponding docking equipment, such as a conveying pipeline, by means of a bolt threaded through the first screw hole 210. Similarly, the discharge port connecting flange 300 is connected to another docking equipment, such as a product packaging container, by means of a bolt threaded through the second screw hole 310.
[0051] Another aspect of this embodiment provides a particulate silicon conveying device, which includes any of the vacuum-removable expansion joints described above.
[0052] This utility model provides a concept and method for a vacuum-dust-removable expansion joint and a particle silicon conveying device. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. All components not explicitly stated in this embodiment can be implemented using existing technology.
Claims
1. An expansion joint capable of vacuum dust removal, characterized in that, include: The expansion joint body (100) includes a feed end (110) and a discharge end (120). A feed port connecting flange (200) is connected to the feed end (110) of the expansion joint body (100). And a discharge port connecting flange (300) connected to the discharge end (120) of the expansion joint body (100); The expansion joint body (100) is provided with a dust removal gas inlet (130) on the side near the discharge port connecting flange (300), and a vacuum dust removal outlet (140) is provided on the side near the feed port connecting flange (200). A feed pipe (400) is installed on the feed port connecting flange (200), and the feed port (410) of the feed pipe (400) extends into the expansion joint body (100) and is located below the vacuum dust removal outlet (140).
2. The vacuum-dust-removable expansion joint according to claim 1, characterized in that, The expansion joint body (100), the inlet connecting flange (200), the outlet connecting flange (300), and the discharge pipe (400) are integrally cast from elastic non-metallic materials.
3. The vacuum-dust-removable expansion joint according to claim 2, characterized in that, The elastic non-metallic material is pure polyurethane or silicone.
4. The vacuum-resistant expansion joint according to claim 1 or 2, characterized in that, The air intake direction of the dust removal gas inlet (130) is inclined upward.
5. The vacuum-resistant expansion joint according to claim 1 or 2, characterized in that, The expansion joint body (100) includes a first connecting pipe section (150) for connecting to the feed port connecting flange (200), a second connecting pipe section (160) for connecting to the discharge port connecting flange (300), and a corrugated pipe section (170), the corrugated pipe section (170) connecting the first connecting pipe section (150) and the second connecting pipe section (160); the dust removal gas inlet (130) is opened in the second connecting pipe section (160), and the vacuum dust removal outlet (140) is opened in the first connecting pipe section (150).
6. The vacuum-dust-removable expansion joint according to claim 1, characterized in that, The feed pipe portion extending into the expansion joint body (100) includes a funnel pipe section (420) and a guide straight pipe section (430) connected to the small diameter end of the funnel pipe section (420). The outlet of the guide straight pipe section (430) is located below the vacuum dust removal outlet (140) so that the feed port (410) of the feed pipe (400) extends into the expansion joint body (100) and is located below the vacuum dust removal outlet (140).
7. The vacuum-dust-removable expansion joint according to claim 6, characterized in that, The straight guide pipe section (430) is arranged parallel to the extension direction of the expansion joint body (100).
8. The vacuum-dust-removable expansion joint according to claim 1, characterized in that, It also includes a dust removal gas inlet plug (500) and a vacuum dust removal outlet plug (600). The dust removal gas inlet plug (500) can block the dust removal gas inlet (130); the vacuum dust removal outlet plug (600) can block the vacuum dust removal outlet (140). The sealing connection between the dust removal gas inlet plug (500) and the dust removal gas inlet (130) and the vacuum dust removal outlet plug (600) and the vacuum dust removal outlet (140) are both plug-type connections or threaded connections.
9. The vacuum-dust-removable expansion joint according to claim 1, characterized in that, It includes a first screw hole (210) and a second screw hole (310). The feed port connecting flange (200) is provided with the first screw hole (210), and the discharge port connecting flange (300) is provided with the second screw hole (310).
10. A particle silicon conveying device, characterized in that, Includes the vacuum-removable expansion joint as described in any one of claims 1 to 9.