Butterfly valve with self-cleaning fireproof function

Abstract

The application provides a butterfly valve with self-cleaning fireproof function, and relates to the field of butterfly valves.The butterfly valve comprises a valve body, a support fixedly connected to the top of the valve body, a gear box fixedly installed at the top of the support, an axle slot formed in the valve body, an upper bearing installed at the top of the axle slot, a lower bearing installed at the bottom of the axle slot, and a valve shaft jointly installed between the lower bearing and the upper bearing.The valve shaft is kept stable through the lower bearing and the upper bearing, and the butterfly valve further comprises a valve plate, a cleaning mechanism, a driving mechanism, a self-locking mechanism and a sealing assembly.When the valve shaft is opened or closed, the circular-truncated-cone cam II is driven to rotate, the circular-truncated-cone cam II abuts against the circular-truncated-cone cam I, the lifting rod moves downward, the pull rod pushes the rotating disc to rotate, the driving gear meshes with a plurality of driven gears when the rotating disc rotates, the cleaning scraper is driven, the cleaning scraper cleans the valve plate, the surface of the valve plate is ensured to be clean, and the cleaning scraper automatically shrinks inward when the valve plate is closed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of butterfly valves, in particular to a butterfly valve with self-cleaning fireproof function. BACKGROUND

[0002] The butterfly valve is also called flap valve, which is a simple structure regulating valve and can be used for on-off control of low-pressure pipeline medium. The butterfly valve refers to a valve in which the closing piece is a disc that rotates around the valve shaft to achieve opening and closing. The valve can be used to control the flow of air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media, etc. In the pipeline, it mainly plays the role of cutting off and throttling.

[0003] At present, the structure of the butterfly valve produced in China is mostly multi-level three-eccentric butterfly valve, which has complex structure, multi-level sealing ring structure, and is difficult to process. The sealing ring is easy to wear and has short service life. The centerline butterfly valve does not have bidirectional sealing and the installation direction is limited. Therefore, we improve it and propose a butterfly valve with self-cleaning fireproof function. SUMMARY

[0004] The purpose of the present application is to provide a butterfly valve with self-cleaning fireproof function, which solves the problems of butterfly valve structure being mostly multi-level three-eccentric butterfly valve, complex structure, multi-level sealing ring structure, difficult to process, sealing ring easy to wear, short service life, centerline butterfly valve without bidirectional sealing, and installation direction limited.

[0005] The present application is as follows:

[0006] A butterfly valve with self-cleaning fireproof function, comprising a valve body, a support is fixedly connected to the top of the valve body, a gear box is fixedly installed on the top of the support, an axle slot is formed in the inside of the valve body, an upper bearing is installed on the top of the axle slot, a lower bearing is installed on the bottom of the axle slot, a valve shaft is jointly installed between the lower bearing and the upper bearing, and the valve shaft is kept stable by the lower bearing and the upper bearing, further comprising:

[0007] A valve plate is fixedly installed on the outer wall of the valve shaft, and the valve plate and the valve shaft are both hollow structures and are in communication with each other;

[0008] A cleaning mechanism is arranged on one side of the valve plate and can rotate to clean the outer surface of the valve plate during the opening and closing of the valve plate;

[0009] A driving mechanism is arranged in the inside of the valve body and cooperates with the cleaning mechanism to drive the cleaning mechanism to perform cleaning action;

[0010] A self-locking mechanism is arranged in the gear box and is used to close the valve plate and limit the rotation of the valve plate;

[0011] A sealing assembly is arranged on the inner wall of the valve body to seal the gap between the valve plate and the valve body when the valve plate is closed.

[0012] As a preferred technical scheme of the present application, the cleaning mechanism comprises a cleaning scraper, a shaft is fixedly connected to the side wall of the cleaning scraper, the cleaning scraper is rotatably connected to the outer wall of the valve plate through a bearing, and a plurality of cleaning scrapers are arranged in an annular array on the valve plate.

[0013] As a preferred technical scheme of the present application, the driving mechanism comprises a lifting rod slidingly connected to the inner side wall of the valve shaft, a pull rod is rotatably connected to the bottom of the lifting rod, one end of the pull rod is rotatably connected to a rotating disc, a driving gear is fixedly connected to the middle of the rotating disc, a driven gear is engaged with the outer wall of the driving gear, the driven gear is fixedly connected to the shaft, and when the lifting rod moves downward, the pull rod pushes the rotating disc to rotate, thereby driving the driving gear to rotate, the driving gear engages with the driven gear, thereby driving the driven gear to clean the valve plate.

[0014] As a preferred technical scheme of the present application, the outer wall of the lifting rod is provided with a spline, the inner side wall of the valve shaft is provided with a sliding groove matched with the spline, and the lifting rod is slidingly connected to the valve shaft through the spline. The lifting rod is slidingly connected to the valve shaft through the spline, so that the lifting rod rotates with the valve shaft, and can also slide up and down relative to the valve shaft to drive the pull rod to move.

[0015] As a preferred technical scheme of the present application, the driving mechanism further comprises a circular cam one fixedly connected to the inner top wall of the gear box, a circular cam two is fixedly connected to the top of the lifting rod, a spring one is fixedly connected to the bottom of the circular cam two, and the spring one is fixedly connected to the valve shaft. The spring one can push the circular cam two to move upward, so that the cleaning scraper is automatically reset.

[0016] As a preferred technical scheme of the present application, the inner wall of the gear box is rotatably connected to a worm, the outer wall of the worm is engaged with a worm gear, the worm gear is fixedly installed on the top of the outer wall of the valve shaft, one end of the worm is fixedly connected to a rotating handle through a fusible alloy column, and the rotating handle is rotatably connected to the side wall of the gear box. The rotating handle is rotatable to drive the worm to rotate, thereby engaging the worm gear, so that the valve shaft rotates to drive the valve plate to open and close.

[0017] As the preferred technical scheme of the present application, the sealing assembly comprises a sealing rubber ring and a gland, the inner side wall of the valve body is provided with a clamping groove, the sealing rubber ring is clamped on the inner wall of the valve body, the side wall of the gland is threadedly connected with a fixing bolt, and the gland is fixedly connected with the valve body through the fixing bolt.

[0018] As the preferred technical scheme of the present application, the self-locking mechanism comprises a support member fixedly connected to the inner side wall of the gear box, the inner side wall of the support member is rotatably connected with a clamping plate, a torsion spring is clamped between the clamping plate and the support member, the top of the worm gear is fixedly connected with a toothed plate, the clamping plate is clamped with the toothed plate to limit the rotation of the worm gear, the support member is fixedly installed with a fusible alloy pin, the fusible alloy pin limits the compression of the torsion spring, and the torsion spring has elastic potential energy in the compressed state, so that the clamping plate automatically moves downward under the action of the elastic potential energy, so that the clamping plate is clamped and fixed with the toothed plate. The fusible alloy pin is used to limit the clamping plate, and when a fire occurs, the high temperature will melt the fusible alloy pin, so that the fusible alloy pin is broken and the clamping plate is automatically opened.

[0019] As the preferred technical scheme of the present application, the top of the worm gear is fixedly connected with a strip-shaped sliding table, and when the clamping plate is turned downward, the strip-shaped sliding table can be abutted to make the worm gear rotate to close the valve plate. The strip-shaped sliding table has an arc-shaped slope, and when the clamping plate moves downward, the strip-shaped sliding table can be abutted to make the worm gear drive the valve plate to automatically close, block the channel and ensure the fireproof effect.

[0020] Compared with the prior art, the present application has the following advantages:

[0021] In the scheme of the present application:

[0022] The valve shaft drives the rotation of the circular cam 2 when opening or closing, the circular cam 2 is in contact with the circular cam 1, so that the lifting rod moves downward, thereby driving the rotation of the rotating disc, when the rotating disc rotates, the driving gear meshes with the plurality of driven gears, thereby driving the cleaning scraper to clean the valve plate, ensuring the cleanliness of the surface of the valve plate, when the valve plate is closed, the circular cam 2 and the circular cam are out of position, driving the cleaning scraper to automatically shrink inward, so as not to affect the tightness of the valve plate closed, the valve plate will extrude the sealing rubber ring when opening and closing, thereby closing the valve body, when a fire occurs, the fusible alloy pin is melted by high temperature, the fusible alloy pin is broken, at this time, the clamping plate automatically slides downward under the pushing force of the torsion spring, so that the clamping plate is clamped on the tooth plate to limit the rotation of the worm gear, and under the pushing force of the clamping plate, the strip-shaped sliding table is in contact, thereby driving the valve shaft to automatically close the valve plate in any state, and then ensuring the stability of the valve plate closed under the limitation of the clamping plate. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A perspective structural schematic view of a butterfly valve with self-cleaning fireproof function is provided in the present application;

[0024] Figure 2 A perspective structural schematic view of a butterfly valve with self-cleaning fireproof function is provided in the present application;

[0025] Figure 3 A perspective structural schematic view of a butterfly valve with self-cleaning fireproof function is provided in the present application;

[0026] Figure 4 A perspective structural schematic view of a butterfly valve with self-cleaning fireproof function is provided in the present application;

[0027] Figure 5 A perspective structural schematic view of a butterfly valve with self-cleaning fireproof function is provided in the present application;

[0028] Figure 6 A perspective structural schematic view of a butterfly valve with self-cleaning fireproof function is provided in the present application;

[0029] Figure 7 A perspective structural schematic view of a butterfly valve with self-cleaning fireproof function is provided in the present application;

[0030] Figure 8 A perspective structural schematic view of a butterfly valve with self-cleaning fireproof function is provided in the present application;

[0031] Figure 9The butterfly valve with self-cleaning and fireproof functions provided in the application Figure 7 The side view structural schematic diagram of the butterfly valve.

[0032] The figure indicates:

[0033] 10, valve body; 11, bracket; 12, gear box; 13, upper bearing; 14, lower bearing; 15, valve shaft; 16, worm; 17, worm wheel; 18, rotating handle;

[0034] 20, valve plate;

[0035] 30, cleaning mechanism; 31, cleaning scraper;

[0036] 40, driving mechanism; 41, lifting rod; 42, pull rod; 43, rotating disc; 44, driving gear; 45, driven gear; 46, spline; 47, round table cam one; 48, round table cam two; 49, spring one;

[0037] 50, self-locking mechanism; 51, support; 52, clamping plate; 53, torsion spring; 54, toothed plate; 55, fusible alloy pin; 56, strip-shaped sliding table;

[0038] 60, sealing assembly; 61, sealing rubber ring; 62, gland. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application.

[0040] Therefore, the following detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but merely represents some embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0041] It should be noted that the embodiments in the present application and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0042] It should be noted that: similar labels and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0043] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product is used, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", etc. are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0044] Please refer to Figures 1 to 9 The present application provides a technical solution: a butterfly valve with self-cleaning fireproof function, comprising a valve body 10, a support 11 fixedly connected to the top of the valve body 10, a gear box 12 fixedly installed on the top of the support 11, an axle slot opened in the inside of the valve body 10, an upper bearing 13 installed on the top of the axle slot, a lower bearing 14 installed on the bottom of the axle slot, a valve shaft 15 jointly installed between the lower bearing 14 and the upper bearing 13, the valve shaft 15 being kept stable by the lower bearing 14 and the upper bearing 13, and further comprising:

[0045] a valve plate 20 fixedly installed on the outer wall of the valve shaft 15, the valve plate 20 and the inside of the valve shaft 15 being hollow structures and being in communication with each other;

[0046] a cleaning mechanism 30 arranged on one side of the valve plate 20 and rotatable to clean the outer surface of the valve plate 20 during the opening and closing of the valve plate 20;

[0047] a driving mechanism 40 arranged in the inside of the valve body 10 and cooperating with the cleaning mechanism 30 to drive the cleaning mechanism 30 to perform cleaning action;

[0048] a self-locking mechanism 50 arranged in the gear box 12 and used to close the valve plate 20 and limit the rotation of the valve plate 20;

[0049] a sealing assembly 60 arranged on the inner wall of the valve body 10 and used to seal the gap between the valve plate 20 and the valve body 10 when the valve plate 20 is closed.

[0050] As a preferred embodiment, on the basis of the above-mentioned mode, further, the cleaning mechanism 30 comprises cleaning scrapers 31, the side walls of the cleaning scrapers 31 being fixedly connected with shafts, the cleaning scrapers 31 being rotatably connected to the outer wall of the valve plate 20 through bearings, the number of the cleaning scrapers 31 being multiple, and the multiple cleaning scrapers 31 being arranged in a ring array on the valve plate 20.

[0051] As a preferred implementation, on the basis of the above manner, further, the drive mechanism 40 comprises a lifting rod 41 slidingly connected to the inner wall of the valve shaft 15, the bottom of the lifting rod 41 is rotatably connected with a pull rod 42, one end of the pull rod 42 is rotatably connected with a rotating disc 43, the middle of the rotating disc 43 is fixedly connected with a driving gear 44, the outer wall of the driving gear 44 is engaged with a driven gear 45, the driven gear 45 is fixedly connected to a support shaft, when the lifting rod 41 moves downward, the pull rod 42 is pressed against the rotating disc 43, so that the rotating disc 43 rotates, thereby driving the driving gear 44 to rotate, the driving gear 44 rotates to engage the driven gear 45, so that the driven gear drives the cleaning scraper 31 to clean the valve plate 20.

[0052] The outer wall of the lifting rod 41 is provided with a spline 46, the inner wall of the valve shaft 15 is provided with a sliding groove matched with the spline 46, the lifting rod 41 is slidingly connected to the valve shaft 15 through the spline 46, the lifting rod 41 is slidingly connected to the valve shaft 15 through the spline 46, so that the lifting rod 41 rotates with the valve shaft 15, and can also slide up and down relative to the valve shaft 15 to drive the pull rod 42 to move.

[0053] The drive mechanism 40 further comprises a circular cam 47 fixedly connected to the inner top wall of the gear box 12, the top of the lifting rod 41 is fixedly connected with a circular cam 48, the bottom of the circular cam 48 is fixedly connected with a spring 49, the spring 49 is fixedly connected with the valve shaft 15, the spring 49 can drive the circular cam 48 to move upward, so that the cleaning scraper 31 is automatically reset.

[0054] As a preferred implementation, on the basis of the above manner, further, the inner wall of the gear box 12 is rotatably connected with a worm 16, the outer wall of the worm 16 is engaged with a worm gear 17, the worm gear 17 is fixedly installed on the top of the outer wall of the valve shaft 15, one end of the worm 16 is fixedly connected with a rotating handle 18 through a fusible alloy column, the other end of the worm 16 is rotatably connected with the inner wall of the gear box 12 through a fusible alloy column, so that in a high temperature state, the worm 16 is unlocked from the worm gear 17, the rotating handle 18 is rotatably connected to the side wall of the gear box 12, and the rotating handle 18 is rotatable to drive the worm 16 to rotate, thereby engaging the worm gear 17, so that the valve shaft 15 rotates to drive the valve plate 20 to open and close.

[0055] The sealing assembly 60 comprises a sealing rubber ring 61 and a gland 62, the inner wall of the valve body 10 is provided with a clamping groove, the sealing rubber ring 61 is clamped to the inner wall of the valve body 10, the side wall of the gland 62 is threadedly connected with a fixing bolt, the gland 62 is fixedly connected with the valve body 10 through the fixing bolt, and the gland 62 is detachably connected with the valve body 10 through the fixing bolt, on the one hand, it is convenient to install, on the other hand, it is convenient to replace and maintain the sealing rubber ring 61, and at the same time, under the action of the sealing rubber ring 61, the valve plate 20 can effectively close the valve body 10.

[0056] As a preferred embodiment, on the basis of the above-mentioned mode, further, the self-locking mechanism 50 comprises a support 51 fixedly connected to the inner side wall of the gear box 12, the inner side wall of the support 51 is rotationally connected with a clamping plate 52, a torsion spring 53 is clamped between the clamping plate 52 and the support 51, the top of the worm gear 17 is fixedly connected with a toothed plate 54, the clamping plate 52 is clamped with the toothed plate 54 to limit the rotation of the worm gear 17, a fusible alloy pin 55 is fixedly installed on the support 51, the fusible alloy pin 55 limits the compression of the torsion spring 53, the torsion spring 53 has elastic potential energy in the compressed state, so that the clamping plate 52 automatically moves downward under the action of the elastic potential energy, so that the clamping plate 52 is clamped and fixed with the toothed plate 54, the fusible alloy pin 55 is used to limit the clamping plate 52, when a fire occurs, the high temperature will melt the fusible alloy pin 55, so that the fusible alloy pin 55 is broken and the clamping plate 52 is automatically opened.

[0057] The top of the worm gear 17 is fixedly connected with a strip-shaped sliding table 56, when the clamping plate 52 is turned downward, the strip-shaped sliding table 56 can be abutted to make the worm gear 17 rotate to close the valve plate 20, the strip-shaped sliding table 56 has an arc-shaped slope, when the clamping plate 52 moves downward, the strip-shaped sliding table 56 can be abutted to make the worm gear 17 drive the valve plate 20 to automatically close, block the channel and ensure the fireproof effect.

[0058] Specifically, the butterfly valve with self-cleaning and fireproof functions in working / using: rotating the rotary handle 18 can drive the worm 16 to rotate, the worm 16 rotates to engage the worm gear 17, thereby driving the valve shaft 15 and the valve plate 20 to rotate, when the valve plate 20 is opened or closed, the circular table cam two 48 is driven to rotate, the circular table cam two 48 abuts against the circular table cam one 47 to make the lifting rod 41 move downward, thereby driving the pull rod 42 to push the rotating disc 43 to rotate, when the rotating disc 43 rotates, the driving gear 44 is engaged with the plurality of driven gears 45, thereby driving the cleaning scraper 31 to clean the valve plate 20, ensuring the cleanliness of the surface of the valve plate 20, when the valve plate 20 is closed, the circular table cam two 48 and the circular table cam one 47 are out of position, driving the cleaning scraper 31 to automatically retract inward, so as not to affect the tightness of the valve plate 20 closing, the valve plate 20 will extrude the sealing rubber ring 61 when opening and closing, thereby closing the valve body 10, when a fire occurs, the high temperature melts the fusible alloy pin 55 and the fusible alloy column, the fusible alloy pin 55 is broken, at this time the clamping plate 52 automatically slides downward under the thrust of the torsion spring 53, thereby driving the valve shaft 15 to automatically close the valve plate 20 in any state, at the same time, the clamping plate 52 will abut against the strip-shaped sliding table 56 under the thrust, so that the clamping plate 52 is clamped on the toothed plate 54 to limit the rotation of the worm gear 17, then under the limitation of the clamping plate 52, the stability of the valve plate 20 closing is ensured.

[0059] The above examples are only used to illustrate the technical solutions described in the present application and do not limit the present application. Although the present application has been described in detail with reference to the above examples, the present application is not limited to the above specific embodiments. Therefore, any modification or equivalent replacement of the present application; and all technical solutions and improvements without departing from the spirit and scope of the application are all included in the scope of the claims of the present application.

Claims

1. A butterfly valve having a self-cleaning fireproof function, characterized in that, The utility model provides a valve, including the valve body (10), the top fixed connection of valve body (10) has the support (11), the top fixed mounting of support (11) has the gear box (12), the inner wall rotationally connected of gear box (12) has the worm (16), the outer wall of worm (16) engages the worm wheel (17), the top fixed mounting of worm wheel (17) is in the outer wall of valve shaft (15), one end of worm (16) is fixedly connected with the rotary handle (18) through fusible alloy column, the rotary handle (18) rotationally connected in the side wall of gear box (12), the inside of valve body (10) is set up the axle slot, and the top installation of axle slot has the upper bearing (13), the bottom installation of axle slot has the lower bearing (14), the lower bearing (14) and upper bearing (13) between jointly install valve shaft (15), still include: Valve plate (20), the outer wall of valve plate (20) is fixedly installed in valve shaft (15), and the inside of valve plate (20) and valve shaft (15) is hollow structure and intercommunication; Cleaning mechanism (30) is arranged at one side of valve plate (20), and can rotate to clean the outer surface of valve plate (20) in the process of opening and closing of valve plate (20); Driving mechanism (40) is arranged in the inside of valve body (10) and is matched with cleaning mechanism (30) and is used for driving cleaning mechanism (30) to carry out cleaning action; Self-locking mechanism (50) is arranged in gear box (12), is used for closing valve plate (20) and limiting the rotation of valve plate (20), and the self-locking mechanism (50) includes the support piece (51) fixedly connected in the inner side wall of gear box (12), the inner side wall rotationally connected of support piece (51) has the clamping plate (52), and the clamping plate (52) is clamped with the torsion spring (53) between support piece (51), the top fixed connection of worm wheel (17) has the toothed plate (54), when the clamping plate (52) is clamped with toothed plate (54), the rotation of worm wheel (17) is limited, the fixed mounting of support piece (51) has fusible alloy pin (55), and fusible alloy pin (55) limits the clamping plate (52) to compress torsion spring (53), the top fixed connection of worm wheel (17) has strip slide platform (56), when the clamping plate (52) is turned down, can touch strip slide platform (56) make worm wheel (17) rotate to close valve plate (20); Sealing assembly (60) is arranged on the inner wall of valve body (10), and the gap between valve plate (20) and valve body (10) is sealed when valve plate (20) is closed.

2. The butterfly valve with self-cleaning fireproof function according to claim 1, characterized in that, The cleaning mechanism (30) includes a cleaning scraper (31), and the side wall of the cleaning scraper (31) is fixedly connected with a support shaft. The cleaning scraper (31) is rotationally connected to the outer wall of the valve plate (20) through a bearing.

3. The butterfly valve with self-cleaning fireproof function according to claim 2, characterized in that, The driving mechanism (40) comprises a lifting rod (41) slidably connected to the inner side wall of the valve shaft (15), the bottom of the lifting rod (41) is rotationally connected with a pull rod (42), one end of the pull rod (42) is rotationally connected with a rotating disc (43), the middle of the rotating disc (43) is fixedly connected with a driving gear (44), the outer wall of the driving gear (44) is engaged with a driven gear (45), and the driven gear (45) is fixedly connected to a support shaft.

4. The butterfly valve with self-cleaning fireproof function according to claim 3, characterized in that, The outer wall of the lifting rod (41) is provided with a spline (46), the inner side wall of the valve shaft (15) is provided with a sliding groove matched with the spline (46), and the lifting rod (41) is slidably connected to the valve shaft (15) through the spline (46).

5. The butterfly valve with self-cleaning fireproof function according to claim 4, characterized in that, The driving mechanism (40) further comprises a circular table cam one (47) fixedly connected to the top wall of the gear box (12), the top of the lifting rod (41) is fixedly connected with a circular table cam two (48), the bottom of the circular table cam two (48) is fixedly connected with a spring one (49), and the spring one (49) is fixedly connected with the valve shaft (15).

6. The butterfly valve with self-cleaning fireproof function according to claim 1, characterized in that, The sealing assembly (60) comprises a sealing rubber ring (61) and a gland (62), the inner side wall of the valve body (10) is provided with a clamping groove, the sealing rubber ring (61) is clamped to the inner wall of the valve body (10), the side wall of the gland (62) is threadedly connected with a fixing bolt, and the gland (62) is fixedly connected with the valve body (10) through the fixing bolt.

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