Four-eccentric butterfly valve reliable in sealing

Abstract

The utility model discloses a reliably-sealed four-eccentric butterfly valve which comprises a butterfly valve body and a connecting pipeline connected with flanges on the two sides of the butterfly valve body, and a sealing mechanism used for sealing is installed between the butterfly valve body and the connecting pipeline. By means of the arrangement of the self-adaption piece, when the sealing mechanism is installed between the butterfly valve body and the connecting pipeline, the sealing lip is inserted into the connecting pipeline, the sealing lip is blocked through the inserting groove, the sealing lip extrudes the elastic block during installation, the elastic block and the supporting piece deform, and therefore the sealing mechanism is installed. When expansion deformation occurs between the connecting pipeline and the butterfly valve body, the sliding plate is pushed through deformation of the elastic block and the supporting piece, the sealing lip is driven to extend, the sealing lip and the inserting groove can be sealed all the time, and therefore automatic adjustment can be achieved according to collision deformation between the butterfly valve body and the connecting pipeline; and the situation that a gap is formed between the butterfly valve body and the connecting pipeline, and the good sealing effect cannot be continuously kept is avoided.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology for four-eccentric butterfly valves, specifically a reliable four-eccentric butterfly valve. Background Technology

[0002] Quadruple eccentric butterfly valves, with their unique quadruple eccentric structure, are widely used in flow control and shut-off applications. Their quadruple eccentric design reduces friction between the butterfly plate and the valve seat during opening and closing, extending the valve's service life. However, in practical use, quadruple eccentric butterfly valves need to be connected to pipelines; currently, traditional quadruple eccentric butterfly valves rely heavily on gaskets for sealing when connected to pipelines.

[0003] However, existing technologies still have significant shortcomings, such as:

[0004] In the existing technology: when the four-sided eccentric butterfly valve is closed to cut off the flow medium, a sudden increase in pressure will occur inside the pipeline. This pressure shock will cause the connection between the four-sided eccentric butterfly valve and the pipeline to expand and deform. Due to the material properties and structural design limitations of traditional sealing gaskets, their adaptive deformation ability is insufficient, making it difficult to respond synchronously to the deformation of the connecting parts and adjust their own shape in time, thus failing to maintain a good sealing effect continuously. Utility Model Content

[0005] The purpose of this invention is to provide a reliable four-eccentric butterfly valve to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a reliable four-eccentric butterfly valve, comprising a butterfly valve body and connecting pipes connected by flanges on both sides thereof, wherein a sealing mechanism for sealing is installed between the butterfly valve body and the connecting pipes;

[0007] The sealing mechanism includes a sealing gasket installed between the butterfly valve body and the connecting pipe, and the surface of the sealing gasket has several threaded holes circumferentially opened. Several bolts are installed through the flange surface of the connecting pipe, and the bolts pass through the threaded holes and are threadedly connected to the flange of the butterfly valve body.

[0008] An adaptive element is installed between the sealing gasket and the connecting pipe to improve the sealing performance between the connecting pipe and the butterfly valve body.

[0009] Preferably, the adaptive component includes a insertion groove formed on one side inside the two connecting pipes, and the sealing gasket has an annular mounting cavity inside;

[0010] A sliding plate is slidably installed inside the annular mounting cavity, and a sealing lip is fixedly installed on one side of the sliding plate. One side of the sealing lip penetrates the sealing gasket and extends into the interior of the connecting pipe. The sealing lip and the insertion groove are inserted into each other.

[0011] Preferably, an elastic block is fixedly installed inside the annular mounting cavity, and a support member is fixedly installed inside the elastic block;

[0012] The support member is mesh-shaped, and both the elastic block and the support member are made of rubber.

[0013] Preferably, the number of elastic blocks is several, and the several elastic blocks are installed in a ring at equal intervals inside the annular mounting cavity, with the two sides of the elastic blocks respectively fixedly connected to one side of the slide plate and the inner wall of the annular mounting cavity.

[0014] Preferably, a sealing ring is installed on the surface of the sealing lip, the sealing ring being annularly fitted onto the surface of the sealing lip, and the sealing ring being made of rubber.

[0015] Preferably, the sealing gasket has an internal reinforcing skeleton, the reinforcing skeleton is mesh-shaped, and the reinforcing skeleton is made of steel.

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

[0017] 1. By utilizing the adaptive component, when the sealing mechanism is installed between the butterfly valve body and the connecting pipe, the sealing lip is inserted into the interior of the connecting pipe, and the sealing lip is blocked by the insertion groove. This causes the sealing lip to compress the elastic block during installation, resulting in deformation of the elastic block and the support component. When expansion deformation occurs between the connecting pipe and the butterfly valve body, the sliding plate is pushed by the deformation of the elastic block and the support component, which in turn causes the sealing lip to extend. This ensures that the sealing lip can always seal with the insertion groove. In this way, it can automatically adjust according to the collision deformation between the butterfly valve body and the connecting pipe, avoiding the occurrence of gaps between the butterfly valve body and the connecting pipe, which would prevent the continuous maintenance of a good sealing effect.

[0018] 2. By utilizing the interplay between the threaded hole and the bolt, the sealing gasket can be simultaneously fixed when the butterfly valve body is connected to the connecting pipe using the threaded connection of the bolt and the threaded hole. Furthermore, the continuous rotation of the bolt can compress the sealing gasket and the self-adaptive component, so that the sealing lip and the sealing ring can seal the gap between the butterfly valve body and the connecting pipe, while also facilitating the disassembly and assembly of the butterfly valve body and the connecting pipe for maintenance purposes. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the sealing mechanism of this utility model;

[0021] Figure 3 This is a partial structural schematic diagram of the sealing mechanism of this utility model;

[0022] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A;

[0023] Figure 5 This is a schematic diagram of the reinforced skeleton structure of this utility model.

[0024] In the diagram: 1. Butterfly valve body; 2. Connecting pipe; 3. Sealing mechanism; 31. Sealing gasket; 32. Threaded hole; 33. Bolt; 34. Adaptive component; 341. Insert groove; 342. Annular mounting cavity; 343. Slide plate; 344. Sealing lip; 345. Elastic block; 346. Support component; 347. Sealing ring; 348. Reinforcing frame. Detailed Implementation

[0025] 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.

[0026] Please see Figures 1-5 This utility model provides a technical solution: a reliable four-eccentric butterfly valve, including a butterfly valve body 1 and connecting pipes 2 connected by flanges on both sides of the butterfly valve body 1 and connecting pipes 2, and a sealing mechanism 3 for sealing is installed between the butterfly valve body 1 and the connecting pipes 2.

[0027] The sealing mechanism 3 includes a sealing gasket 31 installed between the butterfly valve body 1 and the connecting pipe 2, and the surface of the sealing gasket 31 is provided with a plurality of threaded holes 32 in a circular pattern. A plurality of bolts 33 are installed through the flange surface of the connecting pipe 2, and the bolts 33 pass through the threaded holes 32 and are threadedly connected to the flange of the butterfly valve body 1.

[0028] An adaptive element 34 is installed between the sealing gasket 31 and the connecting pipe 2 to improve the sealing performance between the connecting pipe 2 and the butterfly valve body 1.

[0029] Reference Figure 2 , Figure 3 as well as Figure 4As shown, the adaptive component 34 includes a plug groove 341 opened on one side inside the two connecting pipes 2, and an annular mounting cavity 342 opened inside the sealing gasket 31; a sliding plate 343 is slidably installed inside the annular mounting cavity 342, and a sealing lip 344 is fixedly installed on one side of the sliding plate 343. One side of the sealing lip 344 penetrates the sealing gasket 31 and extends into the interior of the connecting pipe 2, and the sealing lip 344 and the plug groove 341 are plugged in; an elastic block 345 is fixedly installed inside the annular mounting cavity 342, and a support member 346 is fixedly installed inside the elastic block 345; the support member 346 is mesh-shaped, and both the elastic block 345 and the support member 346 are made of rubber; there are several elastic blocks 345, and the several elastic blocks 345 are installed in annularly and equidistantly inside the annular mounting cavity 342, and the two sides of the elastic blocks 345 are fixedly connected to one side of the sliding plate 343 and the inner wall of the annular mounting cavity 342, respectively;

[0030] In this embodiment, when the sealing mechanism 3 is installed between the butterfly valve body 1 and the connecting pipe 2, the sealing lip 344 is inserted into the interior of the connecting pipe 2, and the sealing lip 344 is blocked by the insertion groove 341. During installation, the sealing lip 344 squeezes the elastic block 345, causing deformation of the elastic block 345 and the support member 346. When expansion deformation occurs between the connecting pipe 2 and the butterfly valve body 1, the sliding plate 343 is pushed by the deformation of the elastic block 345 and the support member 346, which drives the sealing lip 344 to extend, so that the sealing lip 344 can always seal with the insertion groove 341. In this way, it can automatically adjust according to the collision deformation between the butterfly valve body 1 and the connecting pipe 2, avoiding the situation where gaps appear between the butterfly valve body 1 and the connecting pipe 2, and the good sealing effect cannot be maintained continuously.

[0031] Reference Figure 2 as well as Figure 3 As shown, a sealing ring 347 is installed on the surface of the sealing lip 344. The sealing ring 347 is annularly sleeved on the surface of the sealing lip 344, and the material of the sealing ring 347 is a rubber component.

[0032] In this embodiment, the sealing performance between the sealing lip 344 and the connecting pipe 2 can be further improved, avoiding gaps between the sealing lip 344 and the connecting pipe 2, which could lead to liquid leakage.

[0033] Reference Figure 5 As shown, the sealing gasket 31 has a reinforcing skeleton 348 inside. The reinforcing skeleton 348 is mesh-shaped and made of steel.

[0034] In this embodiment, the strength and stability of the sealing gasket 31 can be further improved, preventing it from deforming excessively under pressure.

[0035] Working principle: When the sealing mechanism 3 is installed between the butterfly valve body 1 and the connecting pipe 2, the sealing gasket 31 is fixed synchronously by the threaded connection of the bolt 33 and the threaded hole 32. The continuous rotation of the bolt 33 can squeeze the sealing gasket 31 and the self-adaptive component 34, inserting the sealing lip 344 into the interior of the connecting pipe 2. The insertion groove 341 blocks the sealing lip 344, so that the sealing lip 344 squeezes the elastic block 345 during installation, causing deformation of the elastic block 345 and the support component 346. When expansion deformation occurs between the connecting pipe 2 and the butterfly valve body 1, the sliding plate 343 is pushed by the deformation of the elastic block 345 and the support component 346, which drives the sealing lip 344 to extend, so that the sealing lip 344 can always seal with the insertion groove 341.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reliably sealed four-eccentric butterfly valve, comprising a butterfly valve body (1) and connecting pipes (2) connected to flanges on both sides thereof, characterized in that: A sealing mechanism (3) for sealing is installed between the butterfly valve body (1) and the connecting pipe (2). The sealing mechanism (3) includes a sealing gasket (31) installed between the butterfly valve body (1) and the connecting pipe (2), and the surface of the sealing gasket (31) is provided with a plurality of threaded holes (32) in a circumferential manner. A plurality of bolts (33) are installed through the flange surface of the connecting pipe (2), and the bolts (33) pass through the threaded holes (32) and are threadedly connected to the flange of the butterfly valve body (1). An adaptive element (34) is installed between the sealing gasket (31) and the connecting pipe (2) to improve the sealing performance between the connecting pipe (2) and the butterfly valve body (1).

2. The reliable four-eccentric butterfly valve according to claim 1, characterized in that: The adaptive component (34) includes a plug groove (341) opened on one side inside the two connecting pipes (2), and the sealing gasket (31) has an annular mounting cavity (342) inside. The annular mounting cavity (342) has a sliding plate (343) slidably installed inside, and a sealing lip (344) is fixedly installed on one side of the sliding plate (343). One side of the sealing lip (344) penetrates the sealing gasket (31) and extends into the interior of the connecting pipe (2). The sealing lip (344) and the insertion groove (341) are inserted into each other.

3. The reliable four-eccentric butterfly valve according to claim 2, characterized in that: An elastic block (345) is fixedly installed inside the annular mounting cavity (342), and a support member (346) is fixedly installed inside the elastic block (345). The support member (346) is mesh-shaped, and both the elastic block (345) and the support member (346) are made of rubber.

4. A reliable four-eccentric butterfly valve according to claim 3, characterized in that: The number of elastic blocks (345) is several, and the several elastic blocks (345) are installed in a ring at equal intervals inside the annular mounting cavity (342). The two sides of the elastic blocks (345) are respectively fixedly connected to one side of the slide plate (343) and the inner wall of the annular mounting cavity (342).

5. A reliable four-eccentric butterfly valve according to claim 2, characterized in that: A sealing ring (347) is installed on the surface of the sealing lip (344). The sealing ring (347) is annularly sleeved on the surface of the sealing lip (344), and the sealing ring (347) is made of rubber.

6. A reliable four-eccentric butterfly valve according to claim 1, characterized in that: The sealing gasket (31) has a reinforcing skeleton (348) inside. The reinforcing skeleton (348) is mesh-shaped and made of steel.

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