Ventilation butterfly valve convenient to maintain

Abstract

The utility model relates to a ventilation butterfly valve convenient to maintain, and aims to solve the problems that an existing ventilation butterfly valve is installed between a left pipeline and a right pipeline, the two ends of the existing ventilation butterfly valve are attached to the contact surfaces of the pipelines, friction is large, and therefore the butterfly valve is inconvenient to pull out and insert during disassembly and assembly. The telescopic butterfly valve comprises a butterfly valve body, an air pipe, telescopic pipe bodies and an adjusting bolt, the telescopic pipe bodies are transversely and slidably connected to the inner sides of openings in the left end and the right end of the butterfly valve body correspondingly, and two limiting grooves which are parallel up and down are formed in the front surface and the rear surface of the butterfly valve body correspondingly; a gear is rotationally connected to the surface of the butterfly valve body between the two limiting grooves in one side of the butterfly valve body, limiting strips are slidably connected to the inner sides of the limiting grooves, one ends of the limiting strips are fixedly connected with the surface of an outer ring, and the outer ring is fixedly connected to the outer edge of an opening of the telescopic pipe body; the utility model has the advantages of strong adaptability and convenience in disassembly and assembly.

Description

Technical Field

[0001] This utility model relates to the field of ventilation butterfly valve technology, specifically a ventilation butterfly valve that is easy to maintain. Background Technology

[0002] Ventilation butterfly valves are widely used in ventilation and environmental protection projects in industries such as chemical, building materials, power plants, and glass. They are mainly used in dusty cold or hot air pipelines as pipeline control devices to regulate or cut off the flow of gas media. The actuator is driven by an electric motor or turbine, which allows the butterfly plate to rotate freely within a 90° range to open, close, or regulate the flow of the medium. The rotation angle of the butterfly plate is proportional to the flow rate of the medium, thereby achieving precise flow control.

[0003] According to the published patent CN 210034443 U, a butterfly valve that is easy to maintain, the combined use of the valve seat, connecting pipe, adjusting plate, mounting base, and disassembly mechanism effectively solves the problem of traditional bolt-fixed installations being difficult to disassemble without tools. This butterfly valve achieves the purpose of easy disassembly, ensuring the convenience of maintenance for workers and increasing disassembly efficiency. Furthermore, in the process of realizing this utility model, the inventors discovered that at least the following problems remain unsolved in the prior art: During use, the ventilation butterfly valve is installed between two pipes, with both ends in close contact with the pipe surfaces, resulting in significant friction. Therefore, it is inconvenient to pull out and insert the butterfly valve during disassembly and assembly. Moreover, during reinstallation after maintenance, it is inconvenient to align the butterfly valve with the pipes on both sides, requiring manual adjustment before fixing with a fixing structure, which is time-consuming and labor-intensive. Therefore, a new technical solution needs to be designed to address this issue. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a ventilation butterfly valve that is easy to maintain. This solves the technical problem that the current ventilation butterfly valve is installed between two pipes on the left and right sides, and the contact surfaces of both ends with the pipes are in close contact, resulting in greater friction. Therefore, it is inconvenient to pull out and insert the butterfly valve during disassembly and assembly, and it is also inconvenient to align the butterfly valve with the pipes on both sides during reinstallation after maintenance, requiring manual back-and-forth adjustment for alignment.

[0005] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: A ventilation butterfly valve designed for easy maintenance includes a butterfly valve body, a duct, a telescopic tube, and adjusting bolts. The telescopic tube is laterally slidably connected to the inner sides of the openings at both ends of the butterfly valve body. Two parallel vertical limiting grooves are formed on the front and rear surfaces of the butterfly valve body. A gear is rotatably connected to the surface of the butterfly valve body between the two limiting grooves on one side. A limiting strip is slidably connected to the inner side of the limiting groove. One end of the limiting strip is fixedly connected to the surface of an outer ring. The outer ring is fixedly connected to the outer edge of the opening of the telescopic tube. A toothed groove is formed on the surface of the limiting strip facing the gear, and the toothed groove meshes with the gear. Two baffles are fixedly connected to the surface of the outer ring away from the butterfly valve body. The baffles are located at the upper edge of the outer ring surface, and fixing bolts are threadedly connected to the center of both the upper and lower surfaces of the outer ring.

[0006] Preferably, an adjusting bolt is threaded to the center of both the front and rear surfaces of the outer ring. One end of the adjusting bolt passes through the surface of the outer ring and is rotatably connected to the extrusion block through a bearing. The extrusion block and the gear are located on the same horizontal plane, and the extrusion block and the gear are located on opposite sides of the outer ring.

[0007] Preferably, a sealing ring is fixedly connected to the outer ring surface on one side of the baffle.

[0008] Preferably, annular grooves are provided on the inner walls of the left and right ends of the butterfly valve body and on the outer surface of the telescopic tube facing the inner wall of the butterfly valve body, and a sealing gasket is embedded and fixedly connected to the inner side of the groove.

[0009] Preferably, rubber blocks are fixedly connected to the center of the upper and lower surfaces of the openings on both the left and right sides of the butterfly valve body, and the bottom of the rubber blocks does not contact the surface of the telescopic tube.

[0010] Preferably, a rotating head is fixedly connected to the center of the outer surface of the gear.

[0011] Preferably, a limiting block is fixedly connected to the surface edge of the limiting strip facing the gear.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model facilitates the disassembly of the butterfly valve body through the limiting strip, limiting groove, gear, and telescopic tube. Twisting the adjusting bolt loosens the squeezing block from the flanges of the two side air ducts, and then unscrewing the fixing bolt, the rotating head drives the gear to rotate clockwise, causing the limiting strip in the limiting groove to slide along the telescopic tubes on both sides towards the inside of the butterfly valve body, so that the outer rings on both sides are disengaged from the flanges. This allows the butterfly valve body to be easily removed, avoiding the problem of excessive friction due to overly tight fit, which makes disassembly difficult and improves the convenience of maintenance.

[0014] 2. This utility model allows for quick positioning and installation using a baffle and fixing bolts. The flange connected to the end of the duct facing the butterfly valve body contacts the outer ring at the opening of the telescopic pipe at both ends of the butterfly valve body. The fixing bolts on the upper and lower sides of the outer ring correspond to the holes on the upper and lower sides of the flange. When the butterfly valve body is lowered until the bottom of the baffle contacts the flange, the butterfly valve body is exactly in the center of the two ducts. After the fixing bolts are aligned with the holes of the flange, the telescopic pipe can be adjusted normally until the installation is complete. Positioning during installation is convenient, eliminating the need to adjust the butterfly valve position back and forth, making it highly practical. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the butterfly valve body of this utility model;

[0017] Figure 3 This is a cross-sectional schematic diagram of the gear section of the butterfly valve body of this utility model.

[0018] In the diagram: 1. Butterfly valve body; 2. Telescopic pipe body; 201. Outer ring; 3. Limiting groove; 4. Limiting strip; 401. Gear groove; 402. Limiting block; 5. Gear; 6. Rotary head; 7. Sealing ring; 8. Fixing bolt; 9. Adjusting bolt; 10. Extrusion block; 11. Butterfly plate body; 12. Sealing gasket; 13. Air duct; 14. Flange; 15. Groove; 16. Rubber block; 17. Baffle. Detailed Implementation

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

[0020] Example 1: A ventilation butterfly valve that is easy to maintain, see [link to example]. Figures 1 to 3The valve includes a butterfly valve body 1, an air duct 13, a telescopic pipe body 2, and an adjusting bolt 9. The telescopic pipe body 2 is laterally slidably connected to the inner sides of the openings at both ends of the butterfly valve body 1. The butterfly plate body 11 inside the butterfly valve body 1 does not affect the normal extension and retraction of the telescopic pipe body 2 during rotation. Two parallel vertical limiting grooves 3 are provided on the front and rear surfaces of the butterfly valve body 1. A gear 5 is rotatably connected to the surface of the butterfly valve body 1 between the two limiting grooves 3 on one side. A limiting strip 4 is slidably connected to the inner side of the limiting grooves 3. One end of the 4 is fixedly connected to the surface of the outer ring 201. The outer ring 201 is fixedly connected to the outer edge of the opening of the telescopic tube 2. The surface of the limiting strip 4 facing the gear 5 is provided with a toothed groove 401. The toothed groove 401 meshes with the gear 5. Rotating the rotating head 6 drives the gear 5 to rotate clockwise, so that the limiting strip 4 in the limiting groove 3 slides with the telescopic tubes 2 on both sides toward the inner side of the butterfly valve body 1, so that the outer rings 201 on both sides are separated from the flange 14, thereby facilitating the removal of the butterfly valve body 1 and avoiding the problem of being difficult to remove due to being too tightly attached.

[0021] Two baffles 17 are fixedly connected to the surface of the outer ring 201 away from the butterfly valve body 1. The baffles 17 are located at the upper edge of the surface of the outer ring 201, and the upper and lower surfaces of the outer ring 201 are threaded with fixing bolts 8. When the butterfly valve body 1 is lowered down until the bottom of the baffles 17 contacts the flange 14, the butterfly valve body 1 is exactly in the center of the two air ducts 13. After the fixing bolts 8 are aligned with the holes of the flange 14, the extension and retraction of the telescopic pipe body 2 can be adjusted normally until the installation is completed. There is no need to adjust the position back and forth, which is highly practical.

[0022] Specifically, such as Figure 1 and Figure 2 As shown, adjusting bolts 9 are threadedly connected to the center of both the front and rear surfaces of the outer ring 201. One end of the adjusting bolt 9 passes through the surface of the outer ring 201 and is rotatably connected to the pressing block 10 through a bearing. The pressing block 10 and the gear 5 are located on the same horizontal plane, and the pressing block 10 and the gear 5 are located on both sides of the outer ring 201 respectively. During installation, the gear 5 rotates counterclockwise, driving the limiting strip 4 and the telescopic tube 2 to move to the outside of the butterfly valve body 1. After contacting the flanges 14 of the two side air ducts 13, the adjusting bolts 9 are rotated to drive the pressing block 10 to move until the flanges 14 are squeezed tight, thereby completing the fixation of both sides.

[0023] Furthermore, such as Figure 1 As shown, a sealing ring 7 is fixedly connected to the surface of the outer ring 201 on one side of the baffle 17. After the flange 14 is squeezed, the sealing ring 7 will block the gap between the telescopic tube 2 and the flange 14 to prevent air leakage.

[0024] It is worth noting that, such as Figure 2As shown, annular grooves 15 are provided on the inner walls of the left and right ends of the butterfly valve body 1 and on the outer surface of the telescopic tube 2 facing the inner wall of the butterfly valve body 1. A sealing gasket 12 is inlaid and fixedly connected to the inner side of the groove 15. The sealing gasket 12 can block the small gap between the butterfly valve body 1 and the telescopic tube 2 to prevent air leakage.

[0025] It is worth noting that, such as Figure 2 As shown, rubber blocks 16 are fixedly connected to the center of the upper and lower surfaces of the openings on both sides of the butterfly valve body 1. The bottom of the rubber block 16 does not contact the surface of the telescopic tube 2. The rubber block 16 can provide a buffer for the butterfly valve body 1 and the telescopic tube 2 when the telescopic tube 2 is adjusted laterally, so as to avoid direct impact and wear at the contact position.

[0026] It is worth noting that, such as Figure 3 As shown, a rotating head 6 is fixedly connected to the center of the outer surface of the gear 5. The rotating head 6 can be rotated manually, thereby driving the gear 5 to rotate. Rotating clockwise and counterclockwise can respectively drive the telescopic tube 2 to slide out and retract.

[0027] It is worth noting that, such as Figure 1 As shown, a limiting block 402 is fixedly connected to the edge of the limiting strip 4 facing the gear 5. The limiting block 402 can block the limiting strip 4 to prevent it from moving too far under the drive of the gear 5 and sliding out of the limiting groove 3, which would cause the telescopic tube 2 to slide out of the butterfly valve body 1.

[0028] Working principle: Turning the adjusting bolt 9 loosens the pressure of the compression block 10 on the flanges 14 of the two side air ducts 13. Then, unscrew the fixing bolt 8. At this time, rotating the rotating head 6 drives the gear 5 to rotate clockwise, causing the limiting strip 4 in the limiting groove 3 to slide along the telescopic tubes 2 on both sides towards the inside of the butterfly valve body 1. This allows the outer rings 201 on both sides to disengage from the flanges 14, making it easy to remove the butterfly valve body 1. This avoids the problem of excessive friction due to overly tight fit, which makes disassembly difficult and improves the convenience of maintenance. When installation is required, the air duct 13 faces the butterfly valve body. One end of the flange 14 is connected to the outer ring 201 at the opening of the telescopic pipe 2 at both ends of the butterfly valve body 1. The fixing bolts 8 on the upper and lower sides of the outer ring 201 correspond to the holes on the upper and lower sides of the flange 14. When the butterfly valve body 1 is lowered until the bottom of the baffle 17 contacts the flange 14, the butterfly valve body 1 is exactly in the center of the two air pipes 13. After the fixing bolts 8 are aligned with the holes of the flange 14, the telescopic pipe 2 can be adjusted normally until the installation is completed. The positioning is relatively convenient during installation, and there is no need to adjust the position of the butterfly valve back and forth.

[0029] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0030] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A maintenance-friendly ventilation butterfly valve, comprising a butterfly valve body (1), a duct (13), a telescopic pipe body (2), and an adjusting bolt (9), characterized in that, The butterfly valve body (1) has telescopic tubes (2) slidably connected to the inner sides of the openings at both ends. Two parallel vertical limiting grooves (3) are provided on the front and rear surfaces of the butterfly valve body (1). A gear (5) is rotatably connected to the surface of the butterfly valve body (1) between the two limiting grooves (3) on one side. A limiting strip (4) is slidably connected to the inner side of the limiting groove (3). One end of the limiting strip (4) is fixedly connected to the surface of the outer ring (201). 201) Fixedly connected to the outer edge of the opening of the telescopic tube (2), and the limiting strip (4) has a toothed groove (401) on the surface facing the gear (5), the toothed groove (401) meshing with the gear (5); the outer ring (201) has two baffles (17) fixedly connected to the surface away from the butterfly valve body (1), the baffles (17) are located at the upper edge of the surface of the outer ring (201), and the upper and lower surfaces of the outer ring (201) are threaded with fixing bolts (8).

2. The easy-to-maintain ventilation butterfly valve as described in claim 1, characterized in that, Adjusting bolts (9) are threadedly connected to the center of the front and rear surfaces of the outer ring (201). One end of the adjusting bolt (9) passes through the surface of the outer ring (201) and is rotatably connected to the extrusion block (10) through a bearing. The extrusion block (10) and the gear (5) are located on the same horizontal plane, and the extrusion block (10) and the gear (5) are located on both sides of the outer ring (201).

3. The easy-to-maintain ventilation butterfly valve as described in claim 1, characterized in that, A sealing ring (7) is fixedly connected to the surface of the outer ring (201) on one side of the baffle (17).

4. The easy-to-maintain ventilation butterfly valve as described in claim 1, characterized in that, The inner walls of the left and right ends of the butterfly valve body (1) and the outer surface of the telescopic tube (2) facing the inner wall of the butterfly valve body (1) are provided with annular grooves (15), and a sealing gasket (12) is embedded and fixedly connected to the inner side of the groove (15).

5. A maintenance-friendly ventilation butterfly valve as described in claim 1, characterized in that, Rubber blocks (16) are fixedly connected to the center of the upper and lower surfaces of the openings on both sides of the butterfly valve body (1). The bottom of the rubber blocks (16) does not contact the surface of the telescopic tube body (2).

6. A ventilation butterfly valve for easy maintenance as described in claim 1, characterized in that, A rotating head (6) is fixedly connected to the center of the outer surface of the gear (5).

7. A maintenance-friendly ventilation butterfly valve as described in claim 1, characterized in that, The limiting strip (4) has a limiting block (402) fixedly connected to the edge of its surface facing the gear (5).

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