Straight flame-proof structure for air inlet of centrifugal fan
By using a combination of straight explosion-proof copper rings and copper rivets at the air inlet of the centrifugal fan, the problems of high manufacturing cost and difficulty in ensuring appearance quality of arc-shaped explosion-proof rings have been solved, thus improving both safety and efficiency.
Patent Information
- Application Number
- CN202423102273.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-12-16
AI Technical Summary
The existing arc-shaped explosion-proof rings at the air inlet of centrifugal fans are costly to manufacture, have difficulty in guaranteeing appearance quality, and involve a complex manufacturing process.
The system adopts a combination structure of straight explosion-proof copper rings and copper rivets. The straight explosion-proof copper rings are fixed to the air inlet cylinder by copper rivets, eliminating the need for the molding and finishing processes of the curved structure. The use of copper materials that do not contain flammable elements avoids the risk of explosion caused by electrostatic sparks.
It reduces the manufacturing cost of explosion-proof structures, improves the operational safety and appearance quality of the fan, enhances the stability of gas flow, and increases the working efficiency of the fan.
Smart Images
Figure CN223662163U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of ventilator, especially, relate to a straight type explosion -proof structure for centrifugal ventilator air inlet. BACKGROUND
[0002] Centrifugal ventilator is the industrial equipment that gas is transported through the rotation of impeller and main shaft, part fan transported gas contains flammable and explosive medium, need to design the structure that can prevent explosion and static electricity spark to fan. The explosion -proof structure of conventional air inlet is the arc structure's explosion -proof ring concentric with the inner camber line of air inlet, the arc structure's explosion -proof ring needs to be riveted on the air inlet first after being pressed into arc with sheet metal, finally need manual operation to adjust the fit condition of arc structure's explosion -proof ring and air inlet along the normal circle in turn, avoid the problem that the overall appearance quality is not up to standard due to the warping of arc structure's explosion -proof ring and air inlet. And the production cost of arc structure's explosion -proof ring is relatively high. INNOVATION CONTENT
[0003] The utility model discloses a straight type explosion -proof structure for centrifugal ventilator air inlet to meet the explosion -proof requirement of ventilator and reduce the production cost of air inlet explosion -proof.
[0004] In order to achieve the above purpose, the technical scheme of the utility model is as follows: a straight type explosion -proof structure for centrifugal ventilator air inlet, including straight type explosion -proof copper ring and copper rivet, the straight type explosion -proof copper ring is installed on the outside of air inlet cylinder, and the copper rivet is used to fix the straight type explosion -proof copper ring and air inlet cylinder.
[0005] Further, the upper side of the straight type explosion -proof copper ring is equipped with first countersunk hole, and the inner side of the air inlet cylinder is equipped with second countersunk hole, and the first countersunk hole and the second countersunk hole are used to place the two ends of the copper rivet.
[0006] Further, the outer side of the air inlet cylinder is equipped with the installation groove for installing the straight type explosion -proof copper ring, and the installation groove is located on the side of the air inlet cylinder close to the impeller inlet.
[0007] Further, the outer periphery of the straight type explosion -proof copper ring is flush with the outer periphery of the air inlet cylinder, and the end of the straight type explosion -proof copper ring is flush with the end of the air inlet cylinder.
[0008] Further, the outer diameter of the air inlet cylinder is less than the diameter of the impeller inlet.
[0009] Further, one side of the air inlet cylinder and the straight type explosion -proof copper ring is located in the impeller inlet.
[0010] The working principle and beneficial effects of the technical solution are as follows: the straight explosion-proof copper ring is arranged on the air inlet cylinder, and the straight explosion-proof copper ring and the air inlet cylinder are connected through copper rivets, so that the structure is simple, and the manufacturing difficulty is reduced. The diameter of the air inlet cylinder is smaller than the diameter of the impeller inlet, so that the gas is smoothly introduced into the impeller, and the efficiency of the fan is improved. The straight explosion-proof copper ring is made of copper material without combustible elements, and the copper rivets are used, so that the explosion of the flammable and explosive medium conveyed by the fan caused by static sparks is avoided, and the safe operation of the fan is ensured. Meanwhile, the straight explosion-proof copper ring and the copper rivets are combined, so that the processes such as profiling and surface arrangement in the manufacturing process of the ordinary arc-shaped explosion-proof ring can be cancelled, the manufacturing cost of the explosion-proof structure is reduced, and the overall appearance quality after the explosion-proof construction of the air inlet is greatly improved. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 FIG. 1 is a structural schematic view of a straight explosion-proof structure for a centrifugal fan air inlet according to the present application. DETAILED DESCRIPTION
[0012] The technical solutions in the embodiments of the present application will be further described in detail below through specific embodiments.
[0013] The reference signs in the accompanying drawings of the specification include: an air inlet ring 1, an air inlet cylinder 2, a straight explosion-proof copper ring 3, a copper rivet 4, and an impeller inlet 5.
[0014] The technical solutions in the embodiments of the present application will be further described in detail below through specific embodiments.
[0015] The embodiments are basically as shown in the accompanying drawings Figure 1The application discloses a straight type explosion-proof structure for an air inlet of a centrifugal fan, which comprises a straight type explosion-proof copper ring 3 and a copper rivet 4. The air inlet cylinder 2 is welded with the air inlet ring 1 to ensure the stable connection of the air inlet ring 1 and the air inlet cylinder 2 and the complete structure. The air inlet ring 1 and the air inlet cylinder 2 are made of common steel material, which can reduce the production cost of the application and does not affect the explosion-proof effect of the application. The straight type explosion-proof copper ring 3 is installed on the outside of the air inlet cylinder 2. Specifically, the outside of the air inlet cylinder 2 is provided with a mounting groove for mounting the straight type explosion-proof copper ring 3, and the mounting groove is located on the side of the air inlet cylinder 2 close to the impeller inlet 5. The outer periphery of the straight type explosion-proof copper ring 3 is flush with the outer periphery of the air inlet cylinder 2, and the end of the straight type explosion-proof copper ring 3 is flush with the end of the air inlet cylinder 2. The copper rivet 4 is used for fixing the straight type explosion-proof copper ring 3 and the air inlet cylinder 2. The upper side of the straight type explosion-proof copper ring 3 is provided with a first countersunk hole, and the inner side of the air inlet cylinder 2 is provided with a second countersunk hole. The first countersunk hole and the second countersunk hole are used for placing the two ends of the copper rivet 4. The outer diameter of the air inlet cylinder 2 is smaller than the diameter of the impeller inlet 5, and one side of the air inlet cylinder 2 and the straight type explosion-proof copper ring 3 is located in the impeller inlet 5.
[0016] The straight type explosion-proof copper ring 3 is arranged on the air inlet cylinder 2, and the straight type explosion-proof copper ring 3 and the air inlet cylinder 2 are connected through the copper rivet 4, so that the structure is simple and the manufacturing difficulty is reduced. The diameter of the air inlet cylinder 2 is smaller than the diameter of the impeller inlet 5, the gaseous medium can flow stably from the air inlet cylinder 2 to the impeller, the flow loss of the fan is reduced, and the working efficiency of the fan is improved. The straight type explosion-proof copper ring 3 is made of copper material without combustible elements, and the copper rivet 4 is used, so that the explosion of the flammable and explosive medium transported by the fan caused by static spark is avoided, and the safe operation of the fan is ensured. Meanwhile, the straight type explosion-proof copper ring 3 and the copper rivet 4 are combined in the structure mode, so that the processes such as profiling and surface arrangement in the manufacturing process of the ordinary arc-shaped explosion-proof ring can be cancelled, the manufacturing cost of the explosion-proof structure is reduced, and the overall appearance quality after the explosion-proof construction of the air inlet is greatly improved.
[0017] It should be noted that, in the present text, the relational terms such as first and second and the like are used only to differentiate one entity or operation from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device.
[0018] The above-mentioned is only the embodiment of the present application, and the common knowledge of the specific structure and characteristics in the scheme is not described in detail, the ordinary skilled person in the art knows all the ordinary technical knowledge in the technical field of the present application before the application date or the priority date, can know all the prior art in the field, and has the ability to apply the conventional experimental means before the date, the ordinary skilled person in the art can improve and implement the present scheme under the enlightenment given in the present application, and some typical known structures or known methods should not become an obstacle for the ordinary skilled person in the art to implement the present application. It should be pointed out that for the skilled person in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.
Claims
1. A straight flameproof construction for a centrifugal fan inlet, characterized in that: The application relates to a straight-type explosion-proof copper ring (3) and a copper rivet (4), wherein the straight-type explosion-proof copper ring (3) is installed on the outside of an air inlet cylinder (2), and the copper rivet (4) is used for fixing the straight-type explosion-proof copper ring (3) and the air inlet cylinder (2); the upper side of the straight-type explosion-proof copper ring (3) is provided with a first countersunk hole, and the inner side of the air inlet cylinder (2) is provided with a second countersunk hole; the first countersunk hole and the second countersunk hole are used for placing two ends of the copper rivet (4); the outer diameter of the air inlet cylinder (2) is smaller than the diameter of an impeller inlet (5); the outer periphery of the straight-type explosion-proof copper ring (3) is flush with the outer periphery of the air inlet cylinder (2); and the end of the straight-type explosion-proof copper ring (3) is flush with the end of the air inlet cylinder (2).
2. A straight type explosion-proof structure for the air inlet of a centrifugal ventilator according to claim 1, characterized in that: The outer side of the air inlet cylinder (2) is provided with a mounting groove for mounting the straight-type explosion-proof copper ring (3), and the mounting groove is located on the side of the air inlet cylinder (2) close to the impeller inlet (5).
3. A straight type flameproof structure for the air inlet of a centrifugal ventilator according to claim 1, characterized in that: The air inlet cylinder (2) and the straight-type explosion-proof copper ring (3) are located on one side of the impeller inlet (5).