Smoke detection butterfly valve for stationary pollution source

Abstract

The utility model relates to a smoke detection butterfly valve for a stationary pollution source. The smoke detection butterfly valve comprises a connecting pipe with two open ends, a rotating shaft vertically penetrating through the outer side wall of the connecting pipe, a circular valve plate coaxially arranged in the connecting pipe, a mounting window arranged on the side wall of the connecting pipe, and a movable door for sealing and covering the mounting window, the round valve plate comprises two half-round plate bodies which are hinged in a half-round mode, the two rotating shafts are coaxially arranged in the radial direction, and positioning steps for positioning the half-round plate bodies are arranged on the side walls of the adjacent ends of the two rotating shafts in a sunken mode. A positioning assembly for fastening and positioning the semicircular piece body on the positioning step is arranged on the positioning step, and the positioning assembly is detachably connected with the rotating shaft; when being assembled in place, the two semicircular sheet bodies are coplanar, and the two ends of the straight edges of the semicircular sheet bodies are respectively fastened on the two positioning steps through the two positioning components; the integral structure is simple, the circular valve plate is convenient to maintain and replace, and the operation of maintenance personnel is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of smoke monitoring technology, and in particular to a butterfly valve for detecting smoke from stationary pollution sources. Background Technology

[0002] Butterfly valves are essential components in smoke monitoring equipment. Also known as flap valves, butterfly valves are simple regulating valves used for the on / off control of low-pressure pipeline media. A butterfly valve is a type of valve where the closing element is a disc that rotates around a valve shaft to open and close. It can be used to control the flow of various fluids such as air, water, steam, and smoke, primarily serving as a shut-off and throttling device in pipelines, and assisting other monitoring equipment in completing monitoring operations.

[0003] In actual production activities, the applicant found that the valve disc of a butterfly valve is subjected to asymmetrical torque at both ends. During repeated opening and closing over a long period, the accumulated torque causes deformation of the valve disc, significantly reducing its smoke-blocking effect. Furthermore, traditional butterfly valves require complete removal from the pipeline for disc replacement during maintenance, which is not only difficult and time-consuming but also indirectly affects the company's production efficiency. Therefore, it is necessary to improve the existing butterfly valve. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a fixed pollution source smoke detection butterfly valve, which can effectively solve the aforementioned problems.

[0005] To achieve the above requirements, the technical solution adopted by this utility model to solve its technical problem is as follows:

[0006] A butterfly valve for detecting smoke from a fixed pollution source is provided, comprising a connecting pipe open at both ends, a rotating shaft perpendicularly penetrating the outer wall of the connecting pipe, a circular valve plate coaxially disposed within the connecting pipe, an installation window disposed on the side wall of the connecting pipe, and a movable door covering the installation window; the circular valve plate comprises two pairs of semi-hinged semi-circular plate bodies, the rotating shaft is provided with two shafts arranged radially coaxially, and each of the adjacent end side walls of the two rotating shafts is recessed with a positioning step for positioning the semi-circular plate body; the positioning step is provided with a positioning component for fastening the semi-circular plate body on the positioning step, and the positioning component is detachably connected to the rotating shaft; when assembled, the two semi-circular plate bodies are coplanar and the two ends of their straight edges are respectively fastened to the two positioning steps by the two positioning components.

[0007] The fixed pollution source smoke detection butterfly valve of this utility model includes a positioning component comprising a clamping block for pressing the semi-circular plate body onto the positioning step, a fastening bolt for fastening the clamping block onto the positioning step, and a positioning pin vertically disposed on the positioning step; the clamping block is provided with a clearance groove adapted to the positioning pin, and the semi-circular plate body is provided with a through hole for the positioning pin to pass through. When assembled in place, the same end of both semi-circular plate bodies is fixed onto the positioning step by the same clamping block.

[0008] The fixed pollution source smoke detection butterfly valve of this utility model has multiple positioning pins and fastening bolts that are evenly arranged along the axial direction of the rotating shaft, and the positioning pins are detachably connected to the rotating shaft.

[0009] The fixed pollution source smoke detection butterfly valve of this utility model has a positioning pin threadedly connected to the rotating shaft, and a polygonal groove is provided on the end face of the end of the positioning pin that extends into the relief groove.

[0010] The fixed pollution source smoke detection butterfly valve of this utility model has multiple positioning pins and multiple fastening bolts arranged alternately along the axial direction of the rotating shaft.

[0011] The fixed pollution source smoke detection butterfly valve of this utility model has a guide plate vertically fixed on one side wall of either of the two semi-circular disc bodies. The guide plate is perpendicular to the rotating shaft, and multiple guide plates are provided and evenly arranged along the length direction of the rotating shaft.

[0012] The fixed pollution source smoke detection butterfly valve of this utility model has an extension at one end of the guide plate, which extends to the side wall of another semicircular plate body opposite to the semicircular plate body that is fixedly connected thereto.

[0013] The fixed pollution source smoke detection butterfly valve of this utility model has a positioning frame coaxially sleeved on the outer wall of the connecting pipe and fitted with the outside of the rotating shaft. The positioning frame is equipped with a bearing adapted to the rotating shaft.

[0014] The fixed pollution source smoke detection butterfly valve of this utility model has a transmission wheel coaxially provided on the end of one of the two rotating shafts that is opposite to the other, so as to facilitate the transmission connection with the drive motor.

[0015] The fixed pollution source smoke detection butterfly valve of this utility model has an arc-shaped elongated door that is coaxial with the connecting pipe, and the length and width of the door are both greater than the length and width of the installation window.

[0016] The beneficial effects of this utility model are as follows: When it is necessary to replace or maintain the circular valve plate, the maintenance personnel can quickly open the movable door and disassemble the positioning component. Then, the two semi-circular plate bodies can be rotated and folded and moved out from the installation window. At this time, the deformed parts can be corrected and repaired, or a new semi-circular plate body can be directly replaced. After the replacement is completed, the movable door can be closed again. The whole process is simple, convenient and quick. There is no need to disassemble the entire connecting pipe. This not only reduces the difficulty of operation for maintenance personnel, but also greatly shortens the maintenance time, thereby indirectly avoiding the impact of long-term maintenance and disassembly operations on the company's production and processing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an overall bird's-eye view of this utility model.

[0019] Figure 2 This is an overall side view of the present invention.

[0020] Figure 3 yes Figure 2 AA sectional view.

[0021] Figure 4 yes Figure 2 BB cross-sectional view.

[0022] Figure 5 This is a circumferential sectional view of the rotating shaft and the semi-circular plate body of this utility model during assembly.

[0023] Figure 6 yes Figure 5 Enlarged view of a local structure. Detailed Implementation

[0024] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0025] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0026] "Multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0027] Furthermore, the terms indicating orientation, such as "up," "down," "left," "right," "upper end," "lower end," and "longitudinal," are all based on the posture and position of the device or equipment described in this solution during normal use.

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] The preferred embodiment of this utility model is a fixed pollution source smoke detection butterfly valve, such as... Figure 1-6 As shown, the device includes a connecting pipe 10 open at both ends, a pivot 20 perpendicularly penetrating the outer wall of the connecting pipe 10, a circular valve plate 30 coaxially disposed within the connecting pipe 10, an installation window 40 disposed on the side wall of the connecting pipe 10, and a movable door 50 covering the installation window 40. Connecting flanges 60 are coaxially disposed on the outer walls at both ends of the connecting pipe 10 for connection to a flue gas duct. The installation window 40 is an arc-shaped strip with the same curvature as the connecting pipe 10. Furthermore, the circular valve plate 30 includes two pairs of semi-hinged semi-circular plate bodies 31, meaning the straight edges of the two semi-circular plate bodies 31 are aligned and connected by a damped hinge 70. The number of hinges 70 can be selected according to actual needs. When the two semi-circular plate bodies 31 are unfolded, they maintain a circular disc shape; when folded, they become an overlapping semi-circular structure, significantly reducing the diameter and allowing easy removal from the installation window 40.

[0030] In addition, in order to improve the isolation effect of the circular valve plate 30, two semi-circular plates 3a are provided on the inner wall of the connecting pipe 10 corresponding to the two semi-circular plate bodies 31. When the air supply rotates to be perpendicular to the connecting pipe 10, the two semi-circular plates 3a are respectively attached to the opposite sides of the two semi-circular plate bodies.

[0031] Furthermore, two rotating shafts 20 are provided and arranged radially coaxially. The adjacent ends of the two rotating shafts 20 extend into the connecting pipe 10, and each shaft has a positioning step 201 recessed on its side wall to position the semi-circular plate body 31. The straight edges of the two semi-circular plate bodies 31 are arranged radially opposite each other on the positioning step 201. Even further, the positioning step 201 is provided with a positioning component 80 that securely fixes the semi-circular plate body 31 to the positioning step 201. The positioning component 80 is detachably connected to the rotating shaft 20, thereby facilitating quick disassembly and installation. When assembled, the two semicircular bodies are coplanar, and their straight edges are fastened to the two positioning steps 201 by two positioning components 80, respectively, to ensure that the disc structure formed by the two semicircular bodies 31 after unfolding is stable and has a certain strength. When it is necessary to replace or maintain the circular valve plate 30, the maintenance personnel can quickly open the movable door 50 and disassemble the positioning components 80, and then rotate and fold the two semicircular bodies 31 and move them out from the installation window 40. At this time, the deformed parts can be corrected and repaired, or a new semicircular body 31 can be directly replaced. After the replacement is completed, the movable door 50 can be closed again. The whole process is simple, convenient and quick, without the need to disassemble the entire connecting pipe 10. This not only reduces the difficulty of operation for maintenance personnel, but also greatly shortens the maintenance time, thereby indirectly avoiding the impact of long-term maintenance and disassembly operations on the company's production and processing.

[0032] In this embodiment, the positioning component 80 includes a clamping block 81 for pressing the semi-circular plate body 31 onto the positioning step 201, a fastening bolt 82 for fastening the clamping block 81 onto the positioning step 201, and a positioning pin 83 vertically disposed on the positioning step 201. The clamping block 81 is provided with a relief groove 810 adapted to the positioning pin 83, and the semi-circular plate body 31 is provided with a through hole 310 for the positioning pin 83 to pass through. When assembled in place, the same end of both semi-circular plate bodies 31 passes through the same clamping block 81. Fixed on the positioning step 201; specifically, multiple positioning pins 83 and fastening bolts 82 are provided and evenly arranged along the axial direction of the rotating shaft 20. The positioning pins 83 are detachably connected to the rotating shaft 20. During assembly, the positioning pins 83 can be installed on the positioning step 201 first, and then the semi-circular plate body 31 can be temporarily positioned on the positioning step 201 by the positioning pins 83. This design allows maintenance personnel to free their hands to operate and install the clamping block 81, and use tools to tighten the fastening screws on the positioning step 201.

[0033] In this embodiment, the positioning pin 83 is threadedly connected to the rotating shaft 20. The end face of the positioning pin 83 that extends into the relief groove 810 is provided with a polygonal groove 830, which facilitates the installation and removal of the positioning pin 83 by maintenance personnel using tools, and also facilitates the initial separate processing and manufacturing.

[0034] In this embodiment, multiple positioning pins 83 and multiple fastening bolts 82 are arranged alternately along the axial direction of the rotating shaft 20 to ensure the stability of the structure after installation.

[0035] In this embodiment, a guide plate 90 is vertically fixed on one side wall of either of the two semicircular bodies 31. The guide plate 90 is perpendicular to the rotating shaft 20. Multiple guide plates 90 are provided and are evenly arranged along the length direction of the rotating shaft 20. Furthermore, one end of the guide plate 90 has an extension 91, which extends to the side wall of the other semicircular body 31 opposite to the semicircular body 31 that is fixedly connected to it. The guide plate 90 can guide the airflow and improve the stability of flue gas delivery.

[0036] In this embodiment, a positioning frame 100 is provided on the outer side wall of the connecting pipe 10, which is coaxially sleeved on the outside of the rotating shaft 20. The positioning frame 100 is provided with a bearing 110 that is adapted to the rotating shaft 20, so as to ensure the smooth rotation of the rotating shaft 20 and improve its service life.

[0037] In this embodiment, a transmission wheel 120 is coaxially provided on the end of either of the two rotating shafts 20 that is opposite to the other, so as to facilitate the transmission connection with the drive motor. The transmission wheel 120 can be a pulley or a gear, and different structures can be selected according to actual needs. As a preferred embodiment, this solution uses a pulley.

[0038] In this embodiment, the movable door 50 is an arc-shaped strip coaxial with the connecting pipe 10. The length and width of the movable door 50 are both greater than the length and width of the installation window 40. One end of the movable door 50 is damped and hinged to the outer wall of the connecting pipe 10 through a hinge 130 to facilitate the opening and closing operation of maintenance personnel. Specifically, multiple connecting screws 140 are provided around the edge of the movable door 50 to achieve connection with the connecting pipe 10.

[0039] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A butterfly valve for detecting smoke from a stationary pollution source, characterized in that The utility model provides a valve, which comprises a connecting pipe with two open ends, a rotating shaft vertically penetrating the outer side wall of the connecting pipe, a circular valve disc coaxially arranged in the connecting pipe, a mounting window arranged on the side wall of the connecting pipe, and a movable door covering the mounting window; the circular valve disc comprises two pairs of half-hinged semicircular disc bodies; the rotating shaft is provided with two radially coaxial rotating shafts; the adjacent end side walls of the two rotating shafts are each concavely provided with a positioning step for positioning the semicircular disc bodies; the positioning step is provided with a positioning assembly for tightly positioning the semicircular disc bodies on the positioning step; the positioning assembly is detachably connected with the rotating shaft; when assembled in place, the two semicircular disc bodies are coplanar, and the two ends of the straight edge of the semicircular disc bodies are respectively tightly fastened on the two positioning steps by the two positioning assemblies.

2. The fixed source smoke detection butterfly valve of claim 1, wherein, The positioning assembly comprises a pressing block for pressing the semicircular disc bodies on the positioning step, a fastening bolt for tightly fastening the pressing block on the positioning step, and a positioning pin vertically arranged on the positioning step; the pressing block is provided with an avoiding groove matched with the positioning pin; the semicircular disc body is provided with a through hole through which the positioning pin passes; when assembled in place, the same end of the two semicircular disc bodies is fixed on the positioning step by the same pressing block.

3. The fixed source smoke detection butterfly valve of claim 2, wherein, The positioning pin and the fastening bolt are each provided with a plurality of positioning pins and fastening bolts uniformly arranged along the axial direction of the rotating shaft; the positioning pin is detachably connected with the rotating shaft.

4. The fixed source smoke detection butterfly valve of claim 3, wherein, The positioning pin is threadedly connected with the rotating shaft; the end face of the end of the positioning pin extending into the avoiding groove is provided with a polygonal groove.

5. The fixed source smoke detection butterfly valve of claim 3, wherein, The plurality of positioning pins and the plurality of fastening bolts are alternately arranged along the axial direction of the rotating shaft.

6. The fixed source smoke detection butterfly valve of claim 1, wherein, A guide plate is vertically fixed on one side wall of any one of the two semicircular disc bodies; the guide plate is perpendicular to the rotating shaft; the guide plate is provided with a plurality of guide plates uniformly arranged along the length direction of the rotating shaft.

7. The fixed source smoke detection butterfly valve of claim 6, wherein, One end of the guide plate has an extension part extending to the side wall of the other semicircular disc body opposite to the semicircular disc body fixedly connected with the guide plate.

8. The fixed source smoke detection butterfly valve of claim 1, wherein, The outer side wall of the connecting pipe is provided with a positioning frame coaxially sleeved on the outer side of the rotating shaft; the positioning frame is provided with a bearing matched with the rotating shaft.

9. The fixed source smoke detection butterfly valve of claim 1, wherein, One end of any one of the two rotating shafts away from the other end is coaxially provided with a transmission wheel facilitating transmission connection with a driving motor.

10. The fixed source smoke detection butterfly valve of claim 1, wherein, The movable door is in the shape of an arc long strip coaxial with the connecting pipe; the length and width of the movable door are greater than the length and width of the mounting window.

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