A disassembly structure for connecting disc and valve body and a three-piece welded butterfly valve

Abstract

This utility model provides a disassembly structure for connecting discs and valve bodies, and a three-piece welded butterfly valve, belonging to the field of valves. It includes a valve body and connecting discs connected to both sides of the valve body. Both connecting discs can be individually disassembled from the side walls of the valve body via connecting components. The outer diameter of the valve body matches the outer diameter of the connecting discs. The end faces of both side walls of the valve body are planes that can fit against the inner end faces of the connecting discs. The valve body includes a front valve disc and a rear valve disc connected to each other via a positioning component. A three-piece welded butterfly valve with a disassembly structure for connecting discs and valve bodies has a valve plate rotatably disposed within the cavity of the valve body, including a sealing component. The beneficial effect of this utility model is that it enables single-sided pre-reservation and single-sided use of pipelines without delaying the normal use of other pipelines in a pipeline system, without completely disassembling the butterfly valve, thus improving sealing performance while ensuring normal use.

Description

Technical Field

[0001] This utility model belongs to the technical field of valves, and in particular relates to a disassembly structure for connecting disc and valve body and a three-piece welded butterfly valve. Background Technology

[0002] In existing technology, welded butterfly valves consist of three parts (such as...). Figure 4 As shown, the valve includes a valve body and two connecting discs on either side. The conventional connection structure uses four bolts: the bolts pass through the rear connecting disc, the valve body, and the front connecting disc in sequence, with nuts threaded onto the ends of the bolts, thus assembling the three parts. During subsequent welding, the connecting discs on both sides are first welded to the pipeline, and then the entire butterfly valve is assembled using the four bolts and nuts.

[0003] When the overall system piping needs to reserve space for a single pipeline, such as Figure 4 As shown, when it is necessary to reserve the right-side connecting plate and its pipeline, since the three parts can only be connected by four bolts, the whole assembly cannot be completed if the right-side connecting plate is missing, and the situation where the pipeline needs to be reserved cannot be applied.

[0004] If the butterfly valve is assembled as a whole in three parts first, and then the pipeline of the right connecting plate is welded separately, it does not comply with the industry's installation standards and poses an operational risk.

[0005] If it is necessary to disassemble the connecting plate on one side in the future, the connecting plates on both sides also need to be removed, so that the butterfly valve is completely disassembled and the system pipeline cannot be used normally.

[0006] If flanged butterfly valves or lug-type butterfly valves are used instead, the required sanitary finish cannot be met, and the project cost will also increase.

[0007] Furthermore, in the existing technology, because the valve body has a concave-convex structure on both sides, the outer diameter of its two sides is not consistent with the outer diameter of the connecting plate, making it difficult to position during docking. If there is misalignment of the components during connection, it will cause valve leakage. Utility Model Content

[0008] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a disassembly structure for connecting disc and valve body and a three-piece welded butterfly valve. It can realize the reservation of one side of the pipeline and the use of one side of the pipeline without delaying the normal use of other pipelines in the pipeline system, and without completely disassembling the butterfly valve. It improves the sealing performance while ensuring normal use.

[0009] To solve the above technical problems, the technical solution adopted by this utility model is: a disassembly structure for connecting discs and valve bodies, including a valve body and connecting discs connected to both sides of the valve body. Both connecting discs can be individually disassembled from the side wall of the valve body through connecting components. The outer diameter of the valve body matches the outer diameter of the connecting discs. The end faces of both side walls of the valve body are planes that can fit against the inner end faces of the connecting discs.

[0010] The valve body includes a front valve disc and a rear valve disc interconnected by a positioning assembly.

[0011] Furthermore, a group of fixing holes is provided on the valve body, evenly distributed along the circumference of the outer wall of the valve body, to provide connection points for the positioning assembly.

[0012] Furthermore, the fixing hole group includes a front fixing hole group provided on the front valve disc and a rear fixing hole group provided on the rear valve disc, and the two are symmetrically arranged.

[0013] Furthermore, the front fixing hole group penetrates the front valve disc and extends into the rear valve disc, and the rear fixing hole group penetrates the rear valve disc and extends into the front valve disc.

[0014] A three-piece welded butterfly valve with a disassembly structure for connecting the disc and the valve body, wherein a valve plate is rotatably disposed within the cavity of the valve body for controlling the flow of media, and includes a sealing assembly for preventing media leakage from the cavity.

[0015] Furthermore, the sealing assembly includes sealing rings disposed at the outlets on both sides of the valve body and sealing seats embedded in the valve body, and the valve plate is rotatable within the sealing seats.

[0016] Furthermore, a mounting bracket is provided at the upper end of the valve body, and the valve plate is driven by a rotating shaft provided in the mounting bracket, with a handle provided at the end of the rotating shaft.

[0017] Furthermore, the protrusion at the lower end of the mounting bracket is respectively inserted into the groove at the upper end of the front valve disc and the groove at the upper end of the rear valve disc.

[0018] Furthermore, a limiting bracket is provided at the upper end of the mounting frame to restrict the rotation angle of the handle, and the handle is fitted into the opening of the limiting bracket.

[0019] The advantages and positive effects of this utility model are:

[0020] 1. By adopting the above technical solution and changing the connection method between the connecting plate and the valve body, a separate connection between the connecting plate and the valve body side wall has been achieved. When welding the reserved pipeline later, the connecting plate to be welded can be removed separately without any functional defects in the valve or impact on the already operating pipeline, ensuring the system pipeline can continue to operate normally and without delaying the overall project progress. If a pipeline or valve malfunctions during operation, it also facilitates subsequent maintenance, meets operation and maintenance requirements, and minimizes maintenance costs.

[0021] 2. The two ends of the valve body are flat surfaces that fit more closely with the connecting plate, and the outer diameter of the valve body is also matched with the outer diameter of the connecting plate, which increases the contact area between the two, prevents misalignment when the connecting plate is connected to the side wall of the valve body, and strengthens the seal at the connection.

[0022] 3. Two positioning bolts, or positioning components, are used on each side of the front and rear valve discs to connect and fix them through half of each other's valve discs. This allows the positioning components to connect the two valve discs at all angles, ensuring that the two valve discs fit tightly together and achieve the required connection strength and sealing requirements. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is an exploded view of the present invention;

[0025] Figure 3 This is a side view of the present invention;

[0026] Figure 4 This is a structural schematic diagram of a welded butterfly valve using existing technology.

[0027] In the picture:

[0028] 1. Front connecting plate; 2. Front valve plate; 21. Front fixing hole assembly;

[0029] 3. Sealing seat; 4. Valve plate;

[0030] 5. Mounting bracket; 51. Handle;

[0031] 6. Rear valve disc; 61. Rear fixing hole assembly; 7. Rear connecting disc;

[0032] 8. Connecting hole. Detailed Implementation

[0033] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0034] like Figures 1 to 3As shown, this embodiment provides a disassembly structure for connecting discs and valve bodies, including a valve body and connecting discs connected to the front and rear sides of the valve body.

[0035] Both connecting discs can be individually detached from the valve body sidewall via connecting components. Specifically, multiple equidistant through holes are provided around the connecting discs, and connecting holes 21 corresponding to the multiple through holes are provided on both sides of the valve body. The connecting holes 21 are threaded holes, and the connecting components are bolts. The bolts pass through the through holes and are threaded into the connecting holes 21, so as to realize the individual installation of the two connecting discs on both sides of the valve body.

[0036] The outer diameter of the valve body matches the outer diameter of the connecting end of the connecting plate, making their outer diameter uniform and easy to plan. The end faces of both sides of the valve body are flat surfaces that can fit into the inner end face of the connecting plate.

[0037] The valve body includes a front valve disc 2 and a rear valve disc 6 connected to each other by a positioning assembly. A group of fixing holes is evenly distributed along the circumference of the outer wall of the valve body, providing connection points for the positioning assembly. The fixing hole group includes a front fixing hole group 21 on the front valve disc 2 and a rear fixing hole group 61 on the rear valve disc 6, symmetrically positioned. Specifically, the front fixing hole group 21 includes two opposing front fixing holes, and the rear fixing hole group 61 includes two opposing rear fixing holes. The center line connecting the two front fixing holes intersects the center line connecting the two rear fixing holes in an "X" shape.

[0038] The positions of the fixing hole group and the connecting hole are avoided. The front fixing hole group 21 passes through the front valve disc 2 and extends into the rear valve disc 6. The rear fixing hole group 61 passes through the rear valve disc 6 and extends into the front valve disc 2. The insertion depth of the front and rear fixing hole groups is half of the corresponding valve disc, so that the connection points of the front valve disc 2 and the rear valve disc 6 are evenly distributed. Both the front fixing hole group 21 and the rear fixing hole group 61 are threaded holes, and the positioning components are bolts.

[0039] A three-piece welded butterfly valve with a disassembly structure for connecting the disc and the valve body includes a valve plate 4 rotatably disposed in the valve body cavity for controlling the flow of the medium, and also includes a sealing assembly and a mounting bracket 5 disposed at the upper end of the valve body.

[0040] The sealing assembly includes sealing rings located at the outlets on both sides of the valve body and sealing seats 3 embedded in the valve body. Specifically, the sealing seat 3 is fastened between the front valve disc 2 and the rear valve disc 6. The valve plate 4 is rotatably connected to the sealing seat 3 by means of a rotating shaft. The upper end of the rotating shaft is fitted into the mounting bracket 5, and a handle 51 for driving the rotating shaft to rotate is provided at its end.

[0041] The protrusions at the four corners of the lower end of the mounting bracket 5 are respectively inserted into the grooves at the upper end of the front valve disc 2 and the upper end of the rear valve disc 6. A limiting bracket is provided at the upper end of the mounting bracket 5 to limit the rotation angle of the handle 51. The handle 51 is fitted into the opening of the limiting bracket, and the included angle formed by the end face of the opening corresponds to the opening and closing state of the valve plate 4.

[0042] The working process of this example:

[0043] Bolts are sequentially connected to the front fixing hole group 21 of the front valve disc 2 and the rear fixing hole group 61 of the rear valve disc 6, so that the front valve disc 2 and the rear valve disc 6 are connected to each other.

[0044] The pipes on both sides of the valve body are welded to the front connecting plate 1 and the rear connecting plate 7 respectively. The bolts pass through the through hole of the front connecting plate 1 and connect to the connecting hole of the front valve plate 2 to achieve the connection with the front valve plate 2. The bolts pass through the through hole of the rear connecting plate 7 and connect to the connecting hole of the rear valve plate 6 to achieve the connection with the rear valve plate 6.

[0045] When it is necessary to remove the front connecting plate 1 and its associated pipelines separately, the front valve plate 2, rear valve plate 6 and rear connecting plate 7, which are combined together, can still be used normally to ensure the normal operation of the valve body.

[0046] When the rear connecting plate 7 and its associated pipelines need to be removed separately, the front connecting plate 1, front valve plate 2 and rear valve plate 6, which are combined together, can still be used normally.

[0047] The foregoing has described one or more embodiments of the present utility model in detail. However, the description is only a preferred embodiment of the present utility model and should not be considered as limiting the scope of the present utility model. All equivalent changes and improvements made within the scope of the claims of the present utility model should still fall within the patent coverage of the present utility model.

Claims

1. A disassembly structure for connecting discs and valve bodies, comprising a valve body and connecting discs connected to both sides of the valve body, characterized in that: Both connecting discs can be individually detached from the side wall of the valve body via a connecting assembly. The outer diameter of the valve body matches the outer diameter of the connecting discs. The end faces of both side walls of the valve body are planes that can fit against the inner end faces of the connecting discs. The valve body includes a front valve disc (2) and a rear valve disc (6) interconnected by a positioning assembly.

2. The disassembly structure for connecting the disc and the valve body according to claim 1, characterized in that: The valve body is provided with a group of fixing holes evenly distributed along the circumference of the outer wall of the valve body, which provides connection points for the positioning assembly.

3. The disassembly structure for connecting the disc and the valve body according to claim 2, characterized in that: The fixing hole group includes a front fixing hole group (21) provided on the front valve disc (2) and a rear fixing hole group (61) provided on the rear valve disc (6), and the two are symmetrically arranged.

4. The disassembly structure for connecting the disc and the valve body according to claim 3, characterized in that: The front fixing hole group (21) penetrates the front valve disc (2) and extends into the rear valve disc (6), and the rear fixing hole group (61) penetrates the rear valve disc (6) and extends into the front valve disc (2).

5. A three-piece welded butterfly valve with a disassembly structure for connecting the disc and valve body as described in claim 1, characterized in that: A valve plate (4) is rotatably disposed within the cavity of the valve body for controlling the flow of the medium, and includes a sealing assembly for preventing the medium from leaking from the cavity.

6. A three-piece welded butterfly valve according to claim 5, characterized in that: The sealing assembly includes sealing rings disposed at the outlets on both sides of the valve body and sealing seats (3) embedded in the valve body, and the valve plate (4) is rotatable within the sealing seats (3).

7. A three-piece welded butterfly valve according to claim 6, characterized in that: A mounting bracket (5) is provided at the upper end of the valve body, and the valve plate (4) is driven by a rotating shaft provided in the mounting bracket (5). A handle (51) is provided at the end of the rotating shaft.

8. A three-piece welded butterfly valve according to claim 7, characterized in that: The protrusion at the lower end of the mounting bracket (5) is respectively inserted into the groove at the upper end of the front valve disc (2) and the groove at the upper end of the rear valve disc (6).

9. A three-piece welded butterfly valve according to claim 8, characterized in that: A limiting bracket is provided at the upper end of the mounting bracket (5) to limit the rotation angle of the handle (51), and the handle (51) fits into the opening of the limiting bracket.

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