Fire-fighting butterfly valve with high sealing performance

Abstract

The utility model discloses a fire-fighting butterfly valve with high sealing performance. The fire-fighting butterfly valve comprises a valve seat and a connecting and sealing device, according to the utility model, the connection sealing device is arranged, namely, the connection sealing device is matched with the sealing ring arranged on the outer side of the butt joint pipe, so that the butt joint pipe and the interior of the connection pipe are in sealed butt joint, the connection pipe and the valve seat are in butt joint and combination without leakage, and the butt joint pipe and the connection pipe can be integrally and firmly in butt joint and combination through quick clamping and matching of the quick connection assemblies arranged on the upper and lower parts of the butt joint pipe; the plugging assembly is arranged, namely, under the cooperation of an inflator pump, a piston rod and an air guide pipe, a plugging ring can be inflated and expanded to assist in plugging a gap between the butt joint pipe and the connecting pipe, and the sealing performance is further enhanced; a clamping shaft arranged at the lower end of the left side of the pressed cover is in limiting butt joint with a clamping groove formed in the left side of the limiting block, the plugging ring can be in a stable plugging state, and efficient auxiliary inflation plugging sealing fit of the butterfly valve is achieved.

Description

Technical Field

[0001] The utility model relates to the relevant field of butterfly valves, in particular to a high-sealing fire-fighting butterfly valve. Background Art

[0002] Fire butterfly valve, also known as fire flap valve, is a simple regulating valve, and can also be used for the on-off control of low-pressure pipeline media. The butterfly valve is a valve whose closing part (valve disc or butterfly plate) is a disc, which rotates around the valve axis to achieve opening and closing. It mainly plays a role of cutting off and throttling in the pipeline. The butterfly valve opening and closing part is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening, closing or regulating.

[0003] The existing application number is CN202322066379.3, which is a high-sealing fire signal butterfly valve, including a valve tube, a fixed section is provided at the upper end of the valve tube, a sealing ring is wrapped around the outer side of the fixed section, and a mounting groove is provided on the inner side, a connecting section is provided above the fixed section, a plug block is provided at the bottom of the connecting section, and a group of symmetrical sliders are provided at the bottom of the plug block. In this utility model, during the use of the fire signal butterfly valve, the connecting pipe is installed through the mounting groove and connected to the valve tube below. The sealing ring on the side of the fixed section and the spiral locking block at the bottom of the valve tube can not only make a simple and accurate connection, ensuring the airtightness of the product, but also can be easily replaced after the butterfly valve is partially damaged, ensuring the function of accurate installation and the sealing in daily use, thereby greatly improving the practicality and usability of the fire signal butterfly valve.

[0004] The above-mentioned existing fire butterfly valve utilizes the sealing ring on the side of the fixed section and the spiral locking block at the bottom of the valve tube, which can not only perform simple and accurate connection and ensure the airtightness of the product, but the current fire butterfly valve generally needs to be connected to the external connecting pipe body to ensure the stable transmission of the liquid. However, there is generally a gap between the connecting pipe body and the butterfly valve, and the overall connection sealing is low. During use, it is more likely to leak. Secondly, during multiple disassembly and assembly processes, affected by the tightness of the connection, the connection sealing between the fire butterfly valve and the connecting pipe is also low. Utility Model Content

[0005] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a high-sealing fire-fighting butterfly valve.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high-sealing fire butterfly valve, including a valve seat, a driving seat is arranged on the upper end of the valve seat, and a control wheel is connected to the rear side of the driving seat in a transmission manner, a rotating shaft is installed at the lower end of the driving seat, and the rotating shaft is vertically inserted into the interior of the valve seat, a valve disc is arranged at the lower end of the rotating shaft, a connecting pipe is installed on the front side of the valve seat, the upper end of the rotating shaft is connected to the control wheel in a transmission manner, and also includes a connecting sealing device arranged on the front side of the valve seat, the connecting sealing device includes a butt pipe fastened to the front side of the valve seat and connected to the rear side of the connecting pipe, a sealing ring installed on the front side of the butt pipe, quick-connect assemblies arranged at the upper and lower ends of the butt pipe, and a sealing assembly installed inside the butt pipe.

[0007] Preferably, the quick-connect assembly includes fixed blocks fixed at the upper and lower ends of the docking tube, a docking rod fixed at the front side of the fixed block, a clamping structure installed inside the docking rod, docking blocks fixed at the upper and lower ends of the rear side of the connecting tube, and a docking hole opened inside the docking block.

[0008] Preferably, the clamping structure includes an adjusting rod rotatably connected to the inside of the docking rod, a moving block threadedly connected to the outside of the adjusting rod, a connecting rod inserted into the inside of both sides of the moving block, a clamping block transmission-connected to the outside of the connecting rod, and a connecting shaft inserted into the clamping block and rotatably connected to the inside of the docking rod.

[0009] Preferably, the sealing assembly includes an air cylinder inserted into the quick-connect assembly, a piston rod plugged into the air cylinder, an air guide tube connected to the lower end of the air cylinder, a sealing ring installed on the outside of the docking tube and connected to the front side of the air guide tube, and a locking structure installed on the upper end of the piston rod.

[0010] Preferably, the locking structure includes a pressure cover arranged relative to the upper end of the piston rod, a plug-in shaft plugged into the lower end of the pressure cover and plugged into the upper end of the piston rod, a compression spring connected to the lower end of the plug-in shaft, a clamping shaft fastened to the left side of the lower end of the pressure cover, a limit block fastened to the upper end of the quick-connect assembly and connected to the outer side of the piston rod, and a clamping groove opened in the limit block and connected to the clamping shaft.

[0011] Preferably, the fixing block and the docking block are symmetrically arranged along the upper and lower rear sides of the docking pipe and the upper and lower rear sides of the connecting pipe, respectively, and the front and rear positions of the fixing block and the docking block correspond.

[0012] Preferably, the clamping blocks are symmetrically arranged along the left and right sides of the interior of the front side of the docking rod, and the clamping blocks on both sides are arranged in L-shaped blocks.

[0013] Preferably, the sealing ring is in an inflated sealing ring state, and the sealing ring is arranged at a position relative to the rear side of the sealing ring.

[0014] Beneficial effects of the utility model:

[0015] Advantage 1: The utility model is provided with a connection sealing device, that is, in cooperation with the sealing ring provided on the outside of the butt pipe, the butt pipe and the connecting pipe can be sealed and connected to the inside, ensuring a leak-free butt combination of the connecting pipe and the valve seat. Moreover, through the quick-connect components provided on the upper and lower sides of the butt pipe, the overall butt combination of the butt pipe and the connecting pipe can be firmly connected, preventing the occurrence of loose connection and leakage.

[0016] Advantage 2: The utility model is provided with a sealing component, that is, when the air cylinder, the piston rod and the air guide tube are pumped together, the sealing ring can be inflated and expanded to assist in sealing the gap between the butt tube and the connecting tube, thereby further enhancing the sealing performance. The clamping shaft provided at the lower end of the left side of the pressure cover and the clamping groove provided on the left side of the limit block are limitedly connected, so that the sealing ring can be in a stable sealing state, thereby realizing efficient auxiliary inflation and sealing cooperation of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the main structure of the butterfly valve of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the connection and sealing device of the utility model;

[0020] Figure 4 This is a schematic diagram of the disassembly structure of the quick-connect assembly of the utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the clamping structure of the utility model;

[0022] Figure 6 It is a schematic diagram of the structure of the plugging component of the utility model;

[0023] Figure 7 It is a schematic diagram of the internal cross-sectional structure of the locking structure of the utility model when viewed from the front.

[0024] Among them: valve seat-1, drive seat-2, control wheel disc-3, rotating shaft-4, valve disc-5, connecting pipe-6, connecting sealing device-7, docking pipe-71, sealing ring-72, quick connection assembly-73, fixing block-731, docking rod-732, clamping structure-733, adjusting rod-7331, moving block-7332, connecting rod-7333, clamping block-7334, connecting shaft-7335, docking block-734, docking hole-735, blocking assembly-74, inflator-741, piston rod-742, air guide tube-743, blocking ring-744, locking structure-745, pressure cover-7451, plugging shaft-7452, compression spring-7453, clamping shaft-7454, limit block-7455, clamping slot-7456. DETAILED DESCRIPTION

[0025] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0026] See also Figure 1-2 The utility model provides a high-sealing fire butterfly valve, including a valve seat 1, a driving seat 2 is arranged on the upper end of the valve seat 1, and a control wheel disc 3 is connected to the rear side of the driving seat 2 in a transmission manner, a rotating shaft 4 is installed at the lower end of the driving seat 2, and the rotating shaft 4 is vertically inserted into the valve seat 1, a valve disc 5 is arranged at the lower end of the rotating shaft 4, a connecting pipe 6 is installed on the front side of the valve seat 1, and the upper end of the rotating shaft 4 is connected to the control wheel disc 3 in a transmission manner, and also includes a connecting sealing device 7 arranged on the front side of the valve seat 1.

[0027] See also Figure 3 The connection sealing device 7 in this embodiment includes a docking tube 71 which is correspondingly and tightly connected to the front side of the valve seat 1 and is combined and docked with the rear side of the connecting tube 6, so as to realize the convenient combined docking of the connecting tube 6 and the valve seat 1, a sealing ring 72 which is correspondingly installed on the outer surface of the front side of the docking tube 71, so that the sealing ring 72 can realize preliminary sealing and strengthening cooperation when the docking tube 71 is docked with the connecting tube 6, a quick-connect component 73 which is symmetrically installed at the upper and lower ends of the docking tube 71 for quick docking, and a plugging component 74 which is installed inside the docking tube 71 and connected to the inside of the upper quick-connect component 73. Through the setting of the plugging component 74, auxiliary inflation sealing and reinforcement cooperation can be realized.

[0028] See also Figure 4-5 The quick-connect assembly 73 includes a fixing block 731 symmetrically fixedly connected to the upper and lower ends of the docking tube 71, a docking rod 732 that is longitudinally fixedly connected to the middle of the front side of the fixing block 731 and is in the shape of a rectangular strip, a clamping structure 733 that is built into the front side of the docking rods 732 on both sides and can achieve docking, clamping and reinforcing cooperation, a docking block 734 symmetrically fixedly connected to the upper and lower ends of the rear side of the connecting tube 6, and a docking hole 735 that is opened in the interior of the docking blocks 734 on both sides and is arranged in the shape of a rectangular concave hole, and the docking hole 735 can be matched with the docking rod 732 for plug-in combination.

[0029] The clamping structure 733 includes an adjusting rod 7331 which is longitudinally rotatably connected to the inside of the docking rod 732, and the adjusting rod 7331 is arranged in a spiral rod shape as a whole, so as to realize stable thread adjustment transmission, a moving block 7332 which is threadedly connected to the outer side of the rear end of the adjusting rod 7331 and can realize forward and backward movement, a connecting rod 7333 which is vertically inserted into the left and right sides of the moving block 7332 for connection transmission, and a clamping block 7334 which is correspondingly connected to the outer end of the connecting rods 7333 on both sides for outward swing clamping, and transverse grooves are provided inside the clamping blocks 7334 on both sides and the connecting ends of the connected connecting rods 7333, so as to ensure the stability of the subsequent connection transmission clamping activities, and a connecting shaft 7335 which is vertically inserted into the inside of the clamping blocks 7334 on both sides and rotatably connected to the inside of the docking rod 732.

[0030] The fixing block 731 and the docking block 734 are symmetrically arranged along the upper and lower rear sides of the docking tube 71 and the upper and lower rear sides of the connecting tube 6, respectively, and the front and rear positions of the fixing block 731 and the docking block 734 correspond to each other. In this way, the fixing block 731 and the docking block 734 can be stably docked and combined to ensure that the connecting tube 6 and the docking tube 71 are quickly and conveniently connected; the clamping block 7334 is symmetrically arranged left and right along the front side of the docking rod 732, and the clamping blocks 7334 on both sides are L-shaped blocks, ensuring that the clamping blocks 7334 on both sides can be moved out synchronously and oppositely to stably clamp with the docking holes 735 inside the docking block 734 to ensure the tightness of the docking.

[0031] See also Figure 6-7 The sealing assembly 74 includes an air cylinder 741 which is vertically inserted into the upper fixed block 731 to achieve air-expanding and sealing cooperation, a piston rod 742 which is vertically inserted into the air cylinder 741 and can be used for extrusion and suction, an air guide tube 743 which is connected to the lower end of the air cylinder 741 and built into the docking tube 71 to achieve air transmission, a sealing ring 744 which is firmly embedded in the outer side of the docking tube 71 and connected to the front upper end of the air guide tube 743, and the sealing ring 744 assists in the sealing and plugging effect to further strengthen the docking sealing and reduce water leakage, and a locking structure 745 which is installed on the upper end of the piston rod 742 to achieve extrusion inflation and auxiliary locking cooperation.

[0032] The locking structure 745 includes a pressure cover 7451 relatively arranged at the upper end of the piston rod 742, a plug-in shaft 7452 vertically plugged into the lower end of the pressure cover 7451 and plugged into the upper end of the piston rod 742, so that the pressure cover 7451 can cooperate with the plug-in shaft 7452 arranged at the bottom to form a movable state, a compression spring 7453 connected to the lower end of the plug-in shaft 7452 and built into the upper end of the piston rod 742, through the elastic force of the compression spring 7453, elastically resisting and locking cooperation can be achieved, and a clamping shaft 7454 vertically fixedly connected to the left side of the lower end of the pressure cover 7451, and the clamping shaft 7454 The overall configuration is in the shape of an inverted frustum, and is fixedly connected to a limit block 7455 which is in contact with the outer side of the piston rod 742 and is secured to the middle of the upper end of the upper fixed block 731. The limit block 7455 allows the piston rod 742 to move vertically up and down smoothly and to be stably locked with the pressure cover 7451. A corresponding card slot 7456 is provided on the left side of the inner portion of the limit block 7455 and is matched with the card shaft 7454. The card slot 7456 is generally in the shape of an arc groove, and the rear opening size of the card slot 7456 is larger than the front opening size, thereby achieving a stable plug-in locking combination of the card shaft 7454.

[0033] The sealing ring 744 is in an inflated sealing ring state, and the sealing ring 744 is located at a position relatively to the rear side of the sealing ring 72, ensuring that the sealing ring 744 can further strengthen the connection sealing and reduce the occurrence of water leakage through the auxiliary inflation sealing effect.

[0034] Here’s how it works:

[0035] When the butterfly valve and the connecting pipe 6 are to be connected in a stable and sealed combination, the connecting pipe 6 can be connected and combined with the connecting pipe 71 provided on the front side of the valve seat 1, so that the connecting pipe 6 is sleeved to the outside of the connecting pipe 71, and the fixing blocks 731 fixed at the upper and lower ends of the connecting pipe 71 can make the connecting rod 732 connected in the middle of the front side correspondingly inserted into the connecting hole 735 inside the connecting block 734 provided on the upper and lower sides of the rear side of the connecting pipe 6, so as to ensure that the connecting pipe 6 and the front side of the valve seat 1 can be positioned and quickly connected. Secondly, when the connecting pipe 6 is sleeved to the outside of the connecting pipe 71, the sealing ring 72 provided on the outer side of the front end of the connecting pipe 71 can be used to perform preliminary sealing and strengthening cooperation, so that the connecting pipe 6 and the connecting pipe 71 are not prone to water leakage when connected, and the connecting pipe 6 and the valve seat 1 can be stably and sealedly connected. In order to ensure that the connecting pipe 6 and the connecting pipe 71 are in a firm state after being positioned and connected, it can be passed through By rotating the adjusting rod 7331 provided inside the front side of the docking rod 732, the adjusting rod 7331 can realize the forward movement of the movable block 7332 which is threadedly connected to the rear side. Driven by the forward movement of the movable block 7332, the connecting rods 7333 which are symmetrically plugged on the left and right sides of the movable block 7332 will transmit the clamping block 7334 connected to the outside, so that the clamping block 7334 can swing out of the docking rod 732 to abut against and clamp the front side of the docking hole 735 provided inside the docking block 734, so as to strengthen the docking firmness between the fixed block 731 and the docking block 734. In this way, after the quick-connect assembly 73 on the other side completes the abutting and clamping activity synchronously under the action of the clamping structure 733, the connecting pipe 6 can be firmly combined and docked with the docking pipe 71, thereby reducing the generation of gaps and reducing water leakage, thereby driving the connecting pipe 6 to the valve seat 1 to quickly seal and dock, thereby strengthening the advantage of connection sealing.

[0036] In order to further enhance the connection sealing and realize the sealing of the gap between the connecting pipe 6 and the butt pipe 71, a plugging assembly 74 is also provided on the outside of the butt pipe 71, that is, by pushing down the piston rod 742, the piston rod 742 can cooperate with the inflatable cylinder 741 provided on the outside, so that the air inside the inflatable cylinder 741 is transmitted along the air guide pipe 743 connected at the bottom to the plugging ring 744 fastened and embedded in the outside of the butt pipe 71, so that the plugging ring 744 is inflated as a whole to assist in sealing the inside of the connecting pipe 6. In this way, under the inflated state, the plugging ring 744 is blocked against each other, the combined sealing of the gap between the connecting pipe 6 and the butt pipe 71 can be further enhanced, so as to reduce the leakage phenomenon of the connecting pipe 6 and the valve seat 1.

[0037] In order to ensure that the sealing ring 744 can be in a stable inflated sealing state as a whole, it is necessary to squeeze the pressure cover 7451 arranged relatively at the upper end of the piston rod 742. In this way, the plug-in shaft 7452 arranged at the middle part of the lower end of the pressure cover 7451 can be synchronously moved downward to squeeze the compression spring 7453 connected to the bottom. At the same time, the clamping shaft 7454 arranged on the left side of the lower end of the pressure cover 7451 can be correspondingly inserted into the clamping groove 7456 opened in the left side of the limit block 7455. After the pressure cover 7451 is integrated, the clamping shaft 7454 can be moved into the small size part of the clamping groove 7456 to realize the counter-locking activity, and after the pressure cover 7451 is loosened, the clamping shaft 7454 and the clamping groove 7456 are firmly clamped and combined with the cooperation of the rebound force of the compression spring 7453, so that the piston rod 742 cannot move up automatically, ensuring that the sealing ring 744 is in a stable inflated sealing state as a whole, so that the connection pipe 6 and the valve seat 1 are connected and the sealing is stable and leak-proof.

[0038] The utility model provides a high-sealing fire-fighting butterfly valve, which is provided with a connecting sealing device 7, that is, a sealing ring 72 arranged on the outer side of the butt pipe 71, so that the butt pipe 71 can be sealed and connected with the inside of the connecting pipe 6, ensuring that the connecting pipe 6 and the valve seat 1 are not leaked. The butt pipe 71 and the connecting pipe 6 can be connected and combined firmly as a whole through the quick-connect components 73 arranged above and below the butt pipe 71, thereby preventing the occurrence of loose connection and leakage. A plugging component 74 is provided, that is, under the cooperation of the inflation cylinder 741, the piston rod 742 and the air guide tube 743, the plugging ring 744 can be inflated to assist in plugging the gap between the butt pipe 71 and the connecting pipe 6, so as to further enhance the sealing performance. Under the limited docking of the clamping shaft 7454 arranged at the lower end of the left side of the pressure cover 7451 and the clamping groove 7456 opened on the left side of the limit block 7455, the plugging ring 744 can be in a stable plugging state, so as to achieve efficient auxiliary inflation and plugging sealing cooperation of the butterfly valve.

[0039] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-sealing fire butterfly valve, comprising a valve seat (1), a driving seat (2) being arranged at the upper end of the valve seat (1), and a control wheel (3) being drivingly connected to the rear side of the driving seat (2), a rotating shaft (4) being arranged at the lower end of the driving seat (2), and the rotating shaft (4) being vertically inserted into the interior of the valve seat (1), a valve flap (5) being arranged at the lower end of the rotating shaft (4), a connecting pipe (6) being arranged at the front side of the valve seat (1), and the upper end of the rotating shaft (4) being drivingly connected to the control wheel (3); Features: It also includes a connection sealing device (7) arranged on the front side of the valve seat (1), the connection sealing device (7) including a butt joint tube (71) fastened to the front side of the valve seat (1) and connected to the rear side of the connecting pipe (6), a sealing ring (72) installed on the front side of the butt joint tube (71), a quick connection assembly (73) arranged at the upper and lower ends of the butt joint tube (71), and a plugging assembly (74) installed inside the butt joint tube (71).

2. According to claim 1, a high sealing fire butterfly valve is characterized in that: The quick-connect assembly (73) comprises a fixing block (731) fixed at the upper and lower ends of the butt joint pipe (71), a butt joint rod (732) fixed at the front side of the fixing block (731), a clamping structure (733) installed inside the butt joint rod (732), a butt joint block (734) fixed at the upper and lower ends of the rear side of the connecting pipe (6), and a butt joint hole (735) opened inside the butt joint block (734).

3. According to claim 2, a high sealing fire butterfly valve is characterized in that: The clamping structure (733) includes an adjusting rod (7331) rotatably connected to the inside of the docking rod (732), a moving block (7332) threadedly connected to the outside of the adjusting rod (7331), a connecting rod (7333) inserted into the inside of both sides of the moving block (7332), a clamping block (7334) transmission-connected to the outside of the connecting rod (7333), and a connecting shaft (7335) inserted into the inside of the clamping block (7334) and rotatably connected to the inside of the docking rod (732).

4. According to claim 1, a high sealing fire butterfly valve is characterized in that: The blocking assembly (74) comprises an air cylinder (741) inserted into the quick-connect assembly (73), a piston rod (742) plugged into the air cylinder (741), an air guide tube (743) connected to the lower end of the air cylinder (741), a blocking ring (744) installed on the outside of the docking tube (71) and connected to the front side of the air guide tube (743), and a locking structure (745) installed on the upper end of the piston rod (742).

5. A high-sealing fire butterfly valve according to claim 4, characterized in that: The locking structure (745) comprises a pressure cover (7451) arranged relative to the upper end of the piston rod (742), a plug-in shaft (7452) plugged into the lower end of the pressure cover (7451) and plugged into the upper end of the piston rod (742), a compression spring (7453) connected to the lower end of the plug-in shaft (7452), a clamping shaft (7454) fastened to the left side of the lower end of the pressure cover (7451), a limit block (7455) fastened to the upper end of the quick-connect assembly (73) and connected to the outer side of the piston rod (742), and a clamping groove (7456) opened in the limit block (7455) and connected to the clamping shaft (7454).

6. According to claim 2, a high sealing fire butterfly valve is characterized in that: The fixing block (731) and the docking block (734) are respectively symmetrically arranged along the upper and lower rear sides of the docking tube (71) and the upper and lower rear sides of the connecting tube (6), and the front and rear positions of the fixing block (731) and the docking block (734) correspond.

7. According to claim 3, a high sealing fire butterfly valve is characterized in that: The clamping blocks (7334) are symmetrically arranged along the left and right sides of the front inner side of the docking rod (732), and the clamping blocks (7334) on both sides are arranged in an L-shaped block shape.

8. According to claim 4, a high sealing fire butterfly valve is characterized in that: The sealing ring (744) is in an inflated sealing ring state, and the sealing ring (744) is located at a position relative to the rear side of the sealing ring (72).

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