Backflow prevention type electric butterfly valve

Abstract

The utility model relates to the technical field of electric butterfly valves, in particular to an anti-backflow type electric butterfly valve. The butterfly valve comprises a butterfly valve body and a locking mechanism, the locking mechanism comprises an extrusion cap, a guide column, a sliding ring and a fixing rod, the bottom of the extrusion cap is fixedly connected with the sliding column, a guide groove is formed in the guide column, the sliding column is embedded in the guide groove and slides up and down along the guide groove, and the sliding ring is fixedly connected to the bottom of the sliding column. A through notch is coaxially formed in the bottom face of the sliding ring and the bottom face of the sliding column, the fixing rod is slidably connected into the through notch, a rotating shaft body of each overturning rod is fixedly connected with a locking base through a connecting plate, the guide column is installed in a notch formed in the same side of the upper clamping base and the supporting rod, and a locking groove is coaxially formed in the bottom of the upper clamping base. When the extrusion cap is pressed downwards, the sliding ring is driven to move in the radial direction of the fixing rod, and the overturning rod is forced to retract around the shaft and break away from the locking groove. And when the pressure is released, the overturning rod expands and is embedded into the locking groove.

Description

Technical Field

[0001] This utility model relates to the field of electric butterfly valve technology, and more specifically, to an anti-backflow electric butterfly valve. Background Technology

[0002] Electric butterfly valves are a type of electric valve and electric regulating valve. The main connection methods for electric butterfly valves are flange type and wafer type; the main sealing methods are rubber seal and metal seal. To protect the electric actuator of an electric butterfly valve, a protective cover is usually installed on the valve. However, this cover is not easily removed quickly, affecting the maintenance of both the actuator and the valve. To address this, Chinese Patent Publication No. CN222687419U describes an electric butterfly valve with a design that improves the stability of the support, retaining bracket, and protective cover through the arrangement of a lower clamp, upper clamp, and locking bolt. Pressing the two stops causes the two insert rods to move horizontally, disengaging their ends from the retaining brackets. Moving the retaining brackets upwards allows for removal of the brackets along with the protective cover, facilitating maintenance of the valve body. During installation, pressing the two stops allows the retaining brackets to be fitted onto the two supports. Releasing the stops causes two springs to push the stops horizontally, inserting the ends of the two insert rods into slots on the side walls of the retaining brackets, facilitating the installation of the retaining brackets and protective cover.

[0003] In the aforementioned technology, when disassembling the card holder and protective cover, if the spring's elastic force causes the insert rod to disengage from the card holder slot when the stop block is pressed, the rod is reset when the stop block is released during the pressing process. Furthermore, since the insert rod itself is rectangular and cannot rotate, disassembling the card holder and protective cover requires continuous pressing of the stop block with both hands. At this time, it is impossible to free up the hand area to remove the protective cover, requiring two people to cooperate in the disassembly and installation work, which is quite inconvenient. Utility Model Content

[0004] This utility model provides an anti-backflow electric butterfly valve, which utilizes a locking mechanism installed between the upper clamp and the support rod. During installation, simply align the slots, apply pressure to the compression cap to narrow the opening of the flip rod, insert it into the slot, and then release the compression cap. This allows the rubber end face of the flip rod to lock into the locking groove. Disassembly is similarly achieved by simply pressing the compression cap to narrow the opening of the flip rod and removing the locking mechanism. This solves the problems mentioned in the background art, namely:

[0005] In the existing technology, multiple people are required to disassemble the protective cover 104 and the mounting bracket, which makes the maintenance of the electric actuator inconvenient.

[0006] To achieve the above objectives, the electric butterfly valve includes a butterfly valve body and a locking mechanism, wherein the locking mechanism includes a compression cap, a guide post, a sliding ring, and a fixing rod;

[0007] The bottom of the compression cap is fixedly connected to a sliding column;

[0008] The guide post has a guide groove inside, and the sliding post is nested in the guide groove and slides up and down along it.

[0009] The sliding ring is fixedly connected to the bottom of the sliding column, and the sliding ring and the bottom surface of the sliding column are coaxially opened with a through slot;

[0010] The fixed rod is slidably connected within the through slot;

[0011] Multiple rotating rods circumferentially distributed on the side of the sliding ring have their rotating shafts fixedly connected to the locking seat via a connecting plate.

[0012] The guide post is installed in the slot opened on the same side as the upper clamp and the support rod, and a locking groove is opened coaxially at the bottom of the upper clamp.

[0013] In the above technical solution, when the extrusion cap is pressed, the driving sliding column moves down along the guide groove of the guide column, causing the sliding ring to move radially along the fixed rod; at this time, the circumferentially distributed flipping rod is pulled by the displacement of the sliding ring and synchronously flips and contracts inward around the rotating shaft, so that the end of the flipping rod is disengaged from the locking groove of the upper clamp; after the pressure is released, the sliding ring is pushed by the elastic element to move in the opposite direction, pushing the flipping rod to flip and expand outward, so that the end of the flipping rod is automatically embedded in the locking groove to complete the fixation.

[0014] Based on this, the bottom end of the fixed rod is fixedly connected to the locking seat, which is a hemispherical structure. An elastic element is sleeved on the outside of the sliding column, and the two ends of the elastic element abut against the compression cap and the upper end face of the guide column, respectively. A rubber protrusion is fixedly provided at the end of the flipping rod. The shape of the rubber protrusion matches and fits into the inner contour of the locking groove. During installation, the elastic element is compressed while the compression cap is pressed, accumulating elastic potential energy. After the locking mechanism is completely submerged in the groove of the upper clamp and the support rod, the compression cap is released, and the elastic potential energy is released, causing the sliding rod to perform a radial movement to reset. At the same time, the flipping rod expands outward along the rotating shaft until the rubber protrusion on the end face of the flipping rod fits and is fixed in the locking groove. During disassembly, the operation is reversed directly to retract the flipping rod inward. Then, the locking mechanism is directly removed along the groove of the upper clamp and the support rod, and the protective cover can be removed.

[0015] In another technical solution, the upper clamp is fixedly connected to the lower clamp by bolts. The upper and lower clamps together form a ring structure covering the outer surface of the butterfly valve body. The upper clamp is provided in multiple sets. Each set of upper clamps and the corresponding support rod groove are equipped with a locking mechanism. The tops of the multiple sets of support rods are fixedly connected to a protective cover. The protective cover covers the electric actuator of the butterfly valve body. The two sets of upper and lower clamps cooperate to fix the four corners of the protective cover to prevent damage to the device due to the breakage of one side of the upper and lower clamps when a hard object collides with it.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] With the locking mechanism installed between the upper clamp and the support rod, during installation, simply align the slots, remove the locking mechanism, apply pressure to the compression cap to narrow the opening of the flip rod, insert it into the slot, and then release the compression cap to lock the rubber end face of the flip rod in the locking groove. During disassembly, simply press the compression cap to narrow the opening of the flip rod and remove the locking mechanism. This device allows for single-person operation during the maintenance of the electric actuator of the electric butterfly valve, making it convenient and eliminating the need for multiple people, thus improving maintenance efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a partial structural schematic diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure at point A of this utility model;

[0021] Figure 4 This is a schematic diagram of the locking mechanism structure of this utility model;

[0022] Figure 5 This is a partial structural schematic diagram of the locking mechanism of this utility model.

[0023] The meanings of the labels in the diagram are as follows:

[0024] 100. Butterfly valve body; 101. Lower clamp; 102. Upper clamp; 103. Support rod; 104. Protective cover;

[0025] 200. Locking mechanism; 201. Compression cap; 202. Sliding column; 203. Elastic element; 204. Guide column; 205. Fixing rod; 206. Sliding ring; 207. Flipping rod; 208. Connecting plate; 209. Locking seat; 210. Locking groove. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Currently, existing technologies require multiple people to disassemble the protective cover 104 and the mounting bracket, making maintenance of the electric actuator inconvenient. This utility model provides an anti-backflow electric butterfly valve. (See [reference]). Figures 1-5 As shown, it includes a butterfly valve body 100 and a locking mechanism 200. The locking mechanism 200 includes a compression cap 201, a guide post 204, a sliding ring 206 and a fixing rod 205.

[0028] The bottom of the compression cap 201 is fixedly connected to the sliding column 202;

[0029] The guide post 204 has a guide groove inside, and the sliding post 202 is nested in the guide groove and slides up and down along it.

[0030] The sliding ring 206 is fixedly connected to the bottom of the sliding column 202, and the sliding ring 206 and the bottom surface of the sliding column 202 are coaxially opened with a through slot;

[0031] The fixing rod 205 is slidably connected within the through slot;

[0032] Multiple circumferentially distributed flipping rods 207 on the side of the sliding ring 206 have their rotating shafts fixedly connected to the locking seat 209 via a connecting plate 208.

[0033] The guide post 204 is installed in the slot opened on the same side of the upper clamp 102 and the support rod 103, and the bottom of the upper clamp 102 is coaxially provided with a locking groove 210.

[0034] During installation, align the support rod 103 with the slot of the upper clamp 102, and take out the pre-prepared locking mechanism 200. At this time, the operator presses the compression cap 201, causing the sliding column 202 to move downward along the guide groove of the guide column 204. Simultaneously, the sliding ring 206 fixed on one side of the sliding column 202 moves radially along the fixed rod 205. The radial displacement of the sliding ring 206 will drive the flipping rod 207 to rotate along its rotation axis, causing one side of the flipping rod 207 to retract inward, thus reducing the overall diameter of the locking mechanism 200. Slightly smaller than the slots of the support rod 103 and the upper clamp 102, the locking mechanism 200 is inserted into the slots, exposing the lower flipping rod 207. At this time, the operator can release the compression cap 201. The compression cap 201 will be reset due to the rebound of the elastic potential energy released by the elastic element 203. The sliding ring 206 at the end of the sliding column 202 moves upward, causing the flipping rod 207 to expand outward along the rotating shaft until the rubber protrusion on the end face of the flipping rod 207 matches and engages with the locking groove 210 on the bottom surface of the upper clamp 102, thus completing the fixation.

[0035] When the protective cover 104 needs to be removed for maintenance of the electric actuator, the operator can press the squeeze cap 201 to retract the flip rod 207, and then take out the entire locking mechanism 200. After the four sets of locking mechanisms 200 are taken out, the support rod 103 and the protective cover 104 can be disassembled for maintenance.

[0036] See Figure 4 As shown, the bottom end of the fixed rod 205 is fixedly connected to the locking seat 209. The locking seat 209 is a hemispherical structure. An elastic element 203 is sleeved on the outside of the sliding column 202. The two ends of the elastic element 203 abut against the upper surface of the compression cap 201 and the guide column 204, respectively. A rubber protrusion is fixedly provided at the end of the flipping rod 207. The shape of the rubber protrusion matches and fits the inner contour of the locking groove 210. When the compression cap 201 is pressed, the elastic element 203 will be compressed and accumulate elastic potential energy. When released, the elastic element 203 will release elastic potential energy, and the compression cap 201 will be reset, causing the flipping rod 207 to expand outward.

[0037] Figure 2 In the middle, the upper clamp 102 is fixedly connected to the lower clamp 101 by bolts. The upper clamp 102 and the lower clamp 101 together form an annular structure covering the outer surface of the butterfly valve body 100. The upper clamp 102 is provided with multiple sets. Each set of upper clamp 102 and the corresponding support rod 103 slot are equipped with a locking mechanism 200. The tops of the multiple sets of support rods 103 are fixedly connected to the protective cover 104. The protective cover 104 covers the electric actuator of the butterfly valve body 100.

[0038] Working principle: When the operator presses the squeezing cap 201, the sliding column 202 moves down along the guide column 204, which drives the sliding ring 206 to move radially along the fixed rod 205, forcing the circumferential flipping rod 207 to retract inward and disengage from the locking groove 210. At this time, the elastic element 203 is compressed and stores energy.

[0039] After the locking mechanism 200 is inserted into the slots of the upper clamp 102 and the support rod 103, the pressure is released, the elastic element 203 pushes the sliding column 202 to reset, the flipping rod 207 expands outward, and the rubber protrusion at its end is embedded in the locking groove 210 to complete the self-locking.

[0040] At the same time, the lower clamp 101 and the upper clamp 102 are fixed by bolts, which hold the butterfly valve body 100 tightly. Multiple locking mechanisms 200 simultaneously fix the support rod 103, so that the top protective cover 104 can stably cover the electric actuator. When disassembling, press the squeezing cap 201 in the opposite direction to release the lock and the protective cover 104 can be quickly removed.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A backflow-preventing electric butterfly valve, comprising a butterfly valve body (100) and a locking mechanism (200), characterized in that: The locking mechanism (200) includes a compression cap (201), a guide post (204), a sliding ring (206), and a fixing rod (205); The bottom of the compression cap (201) is fixedly connected to the sliding column (202); The guide post (204) has a guide groove inside, and the sliding post (202) is nested in the guide groove and slides up and down along it; The sliding ring (206) is fixedly connected to the bottom of the sliding column (202), and the sliding ring (206) and the bottom surface of the sliding column (202) are coaxially opened with a through slot; The fixing rod (205) is slidably connected to the through slot; Multiple rotating rods (207) are circumferentially distributed on the side of the sliding ring (206), and their rotating shafts are fixedly connected to the locking seat (209) through the connecting plate (208); The guide post (204) is installed in the slot opened on the same side of the upper clamp (102) and the support rod (103), and the bottom of the upper clamp (102) is coaxially provided with a locking groove (210); When the compression cap (201) is pressed down, the driving sliding ring (206) moves radially along the fixed rod (205), forcing the flipping rod (207) to retract around the axis and disengage from the locking groove (210); when the pressure is released, the flipping rod (207) expands and embeds into the locking groove (210).

2. The anti-backflow electric butterfly valve according to claim 1, characterized in that: The bottom end of the fixing rod (205) is fixedly connected to the locking seat (209), and the locking seat (209) is a hemispherical structure.

3. The anti-backflow electric butterfly valve according to claim 1, characterized in that: An elastic element (203) is sleeved on the outside of the sliding column (202), and the two ends of the elastic element (203) abut against the compression cap (201) and the upper end face of the guide column (204) respectively.

4. The anti-backflow electric butterfly valve according to claim 1, characterized in that: The upper clamp (102) is fixedly connected to the lower clamp (101) by bolts. The upper clamp (102) and the lower clamp (101) together form an annular structure covering the outer surface of the butterfly valve body (100).

5. The anti-backflow electric butterfly valve according to claim 1, characterized in that: The upper clamp (102) is provided in multiple sets, and each set of upper clamp (102) and the corresponding support rod (103) are equipped with a locking mechanism (200).

6. The anti-backflow electric butterfly valve according to claim 5, characterized in that: Multiple sets of support rods (103) are fixedly connected to a protective cover (104) at their top ends. The protective cover (104) covers the electric actuator of the butterfly valve body (100).

7. The anti-backflow electric butterfly valve according to claim 1, characterized in that: The end of the flipping rod (207) is fixed with a rubber protrusion, the shape of which matches and fits the inner contour of the locking groove (210).

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