Butterfly valve and check integrated valve

Abstract

The utility model discloses a butterfly valve and check integrated valve, which belongs to the technical field of butterfly valves, and comprises a valve casing I, a valve casing II and a check valve, and further comprises a valve rod, a resistance component and an adjusting component, the resistance component is mounted at the outer end of the valve rod, the adjusting component is mounted at the outer end of a sleeve, and the valve casing I and the valve casing II are arranged in the sleeve. The adjusting assembly is used for driving and adjusting the resistance assembly so that the resistance assembly can press the rotating block downwards, the rotating block is fixed to the outer end of the valve rod, a plurality of inclined grooves distributed at equal intervals are formed in a first inclined face of the rotating block, the friction disc is arranged in a wave shape, and when the friction disc tightly abuts against the interiors of the inclined grooves in the rotating block through pressurization of the adjusting assembly, the friction disc can rotate. When the butterfly valve is closed, the protruding edge on the inner side of the friction disc can be clamped in the inclined groove, at the moment, when a worker rotates the valve rod to close the butterfly valve, due to the fact that the friction disc has elasticity and is clamped with the inclined groove, paragraph type resistance can be formed, more time is needed for closing the butterfly valve, and the water hammer effect is weakened.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and more specifically, to a butterfly valve check valve. Background Technology

[0002] A butterfly valve-check valve is a type of valve that integrates the functions of a butterfly valve and a check valve. It is mainly used in pipeline systems where it is necessary to cut off and regulate flow while preventing backflow of the medium. The medium pressure pushes the check valve plate (or butterfly plate) to open, allowing the fluid to pass normally. If flow regulation is required, the opening of the butterfly valve can be controlled manually or by an actuator. When the medium flows backward, the check valve part automatically closes to prevent backflow.

[0003] Chinese Patent Announcement No. CN218440807U discloses an integrated butterfly check valve. This design features an inlet end for the butterfly valve body and an outlet end for the check valve body. Combined with the check valve body and spring seat, it achieves the integrated butterfly check valve function while facilitating disassembly and cleaning. Specifically, the disassembly end is located at the spring seat, allowing for a lower sealing rating for the valve plate's gasket. An elongated bushing is provided on one side of the spring seat to prevent spring tilting from reducing the sealing performance of the valve plate on the other side and causing leakage.

[0004] When the butterfly valve closes quickly, the fluid in the pipeline continues to flow at its original speed due to inertia, causing fluid to accumulate on the upstream side of the valve. This leads to a sudden increase in pressure and the formation of a water hammer effect, which can damage the valve and the pipeline. The butterfly valve in the above solution does not have a corresponding slow-closing measure. When closing the butterfly valve, the operator may close it too quickly, which increases the intensity of the water hammer effect.

[0005] Therefore, a butterfly valve-check valve is proposed to address the above problems. Utility Model Content

[0006] This utility model provides a butterfly valve check valve that can improve the problems existing in related technologies: when the butterfly valve is closed quickly, the pressure rises sharply and a water hammer effect is formed. The butterfly valve does not have a corresponding slow closing measure. When the operator closes the butterfly valve, the closing speed is too fast, which increases the intensity of the water hammer effect.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] This application provides a butterfly valve-check valve, including a valve body 1, a valve body 2, and a check valve. It also includes a valve stem, a resistance component, and an adjusting component. A valve plate is fixedly mounted at the bottom end of the valve stem, and the valve stem drives the valve plate to rotate to open and close the butterfly valve. The resistance component includes a rotating block and a friction disc. The rotating block is fixedly mounted on the outer end of the valve stem, and an inclined surface is provided at the outer end of the rotating block. The friction disc is adapted to the inclined surface. An annularly spaced, equidistant inclined groove is formed on the outer surface of the inclined surface, and the inclined groove is adapted to the friction disc. The adjusting component is located above the resistance component, and by moving downwards, the adjusting component forces the friction disc against the rotating block. The friction disc abuts against the inclined surface, thereby increasing the rotational resistance of the valve stem.

[0009] The technical solutions described in this application embodiment have at least the following technical effects:

[0010] A resistance component is installed at the outer end of the valve stem, and an adjustment component is installed at the outer end of the sleeve. The adjustment component drives the adjustment resistance component, causing the resistance component to press down on the rotating block. The rotating block is fixed to the outer end of the valve stem. Multiple equally spaced inclined grooves are opened on the inclined surface of the rotating block, and the friction disc is designed in a wave shape. When the friction disc is pressed tightly against the inclined groove on the rotating block by the adjustment component, the protruding edge on the inner side of the friction disc will be stuck in the inclined groove. When the operator then closes the butterfly valve by rotating the valve stem, due to the elasticity of the friction disc and its engagement with the inclined groove, segmented resistance is formed, making it take more time to close the butterfly valve and reducing the water hammer effect.

[0011] In some embodiments, valve housing 1 and valve housing 2 are fixedly connected, and valve housing 3 is fixedly installed on the other side of valve housing 2. The check valve is disposed inside valve housing 3, and flanges are fixedly installed on both valve housing 1 and valve housing 3 at opposite ends.

[0012] In some embodiments, a sealing bushing is installed between the first valve housing and the second valve housing. The sealing bushing is fitted onto the outer end of the valve plate to form a seal. A sleeve is installed on the top of the first valve housing and the second valve housing. An installation groove is provided inside the sleeve. The adjusting component and the resistance component are both located inside the installation groove.

[0013] In some embodiments, the top of the valve stem extends through the sleeve to the outside and is fixedly mounted with a pull rod, and the outer end of the sleeve is provided with annularly distributed movable grooves.

[0014] In some embodiments, the resistance assembly further includes a pressure plate, the pressure plate, the rotating block and the friction plate are coaxially arranged, the pressure plate is located above the friction plate, the outer surface of the friction plate is wavy, a connecting ring is fixedly installed on the top of the friction plate, and a second inclined surface adapted to the friction plate is opened on the inner side of the pressure plate, and the connecting ring is fixedly installed on the top of the inside of the pressure plate.

[0015] In some embodiments, the adjusting assembly includes a rotary ring and a slip ring. The inner side of the rotary ring and the outer end of the sleeve are provided with mutually compatible threads. The inner side of the rotary ring is provided with an annular groove that is compatible with the slip ring. The slip ring is sleeved on the outer end of the sleeve and is slidably connected to the annular groove.

[0016] In some embodiments, the adjusting assembly further includes a pressure plate, the outer end of which is fixedly mounted with equidistantly distributed connecting blocks, the connecting blocks passing through the movable groove and being fixedly connected to the inner side of the slip ring, and the pressure plate being connected to the top of the pressure plate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the valve housing structure of this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the sleeve structure of this utility model;

[0020] Figure 4 This is a side sectional view of the installation structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the resistance component structure of this utility model;

[0022] Figure 6 This is a cross-sectional view of the pressure plate structure of this utility model;

[0023] Figure 7 This is a schematic diagram of the adjustment component structure of this utility model.

[0024] Explanation of the labels in the diagram:

[0025] 1. Valve housing one;

[0026] 2. Valve housing two;

[0027] 3. Valve housing three;

[0028] 4. Flange;

[0029] 5. Check valve;

[0030] 6. Sleeve;

[0031] 7. Adjustment component; 71. Rotary ring; 72. Annular groove; 73. Pressing plate; 74. Slip ring; 75. Connecting block;

[0032] 8. Pull rod;

[0033] 9. Valve plate;

[0034] 10. Valve stem;

[0035] 11. Movable slot;

[0036] 12. Resistance component; 121. Friction disc; 122. Pressure disc; 123. Rotating block; 124. Inclined groove; 125. Inclined surface one; 126. Inclined surface two; 127. Connecting ring;

[0037] 13. Mounting slot;

[0038] 14. Sealing bushing. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0040] Please see Figure 1 - Figure 7 A butterfly valve with integrated check valve includes a valve housing 1, a valve housing 2, and a check valve 5. It also includes a valve stem 10, a resistance assembly 12, and an adjusting assembly 7. A valve plate 9 is fixedly mounted at the bottom of the valve stem 10. The valve stem 10 drives the valve plate 9 to rotate to open and close the butterfly valve. The resistance assembly 12 includes a rotating block 123 and a friction disc 121. The rotating block 123 is fixedly mounted on the outer end of the valve stem 10. An inclined surface 125 is provided on the outer end of the rotating block 123. The friction disc 121 is adapted to the inclined surface 125. An annularly distributed inclined groove 124 is provided on the outer surface of the inclined surface 125. The inclined groove 124 is adapted to the friction disc 121. The adjusting assembly 7 is located above the resistance assembly 12. The adjusting assembly 7 moves downward to force the friction disc 121 against the rotating block 123. The friction disc 121 abuts against the inclined surface 125, thereby increasing the rotational resistance of the valve stem 10.

[0041] The valve in this design is primarily a small valve for fluid control. It is a traditional butterfly valve connected to a check valve, forming a single integrated valve that improves integration. The main body consists of interconnected valve housing 1, valve housing 2, and valve housing 3. The butterfly valve is located between valve housing 1 and valve housing 2, while the check valve 5 is located inside valve housing 3. Compared to existing small butterfly valves, this design allows for adjustment of the resistance during valve opening and closing. A resistance assembly 12 is installed at the outer end of the valve stem 10, and an adjustment assembly 7 is installed at the outer end of the sleeve 6. The adjustment assembly 7 drives the adjustment resistance assembly 12, causing the resistance assembly 12 to press down on the rotating block. 123. The rotating block 123 is fixed to the outer end of the valve stem 10. Multiple equally spaced inclined grooves 124 are opened on the inclined surface 125 of the rotating block 123. The friction disc 121 is wavy. When the friction disc 121 is pressed tightly against the inclined groove 124 on the rotating block 123 by the adjustment component 7, the protruding edge of the inner side of the friction disc 121 will be stuck in the inclined groove 124. When the operator closes the butterfly valve by rotating the valve stem 10, due to the elasticity of the friction disc 121 and its engagement with the inclined groove 124, segmented resistance will be formed, which will require more time to close the butterfly valve and reduce the water hammer effect.

[0042] Please see Figure 1 - Figure 3 Valve housing 1 and valve housing 2 are fixedly connected. Valve housing 3 is fixedly installed on the other side of valve housing 2. Check valve 5 is installed inside valve housing 3. Flange 4 is fixedly installed on both valve housing 1 and valve housing 3 at opposite ends.

[0043] A sealing bushing 14 is installed between valve housing 1 and valve housing 2. The sealing bushing 14 is fitted onto the outer end of valve plate 9 to form a seal. A sleeve 6 is installed on the top of valve housing 1 and valve housing 2. An installation groove 13 is opened inside the sleeve 6. The adjusting component 7 and the resistance component 12 are both located inside the installation groove 13.

[0044] The top of the valve stem 10 extends through the sleeve 6 to the outside and is fixedly installed with a pull rod 8. The outer end of the sleeve 6 is provided with annularly distributed movable grooves 11.

[0045] In this design, valve housing 1 and valve housing 2 can be connected by bolts, while valve housing 3 and valve housing 2 are integrally formed. Flange 4 is fixed at the opposite ends of valve housing 1 and valve housing 3. Flange 4 is mainly used to connect external pipelines. The sealing bushing 14 is installed at the connection between valve housing 1 and valve housing 2. It is a clamp type. The valve plate 9 is wrapped by the sealing bushing 14 to form a seal. The connecting rod on the valve plate 9 passes through the sealing bushing 14 and is connected to the valve stem 10.

[0046] The check valve 5 installed inside valve body 3 is a piston type, mainly composed of piston, sealing gasket, spring, piston rod and fixed frame. The spring pushes the piston against the port of valve body 3, so that valve body 3 can only input and cannot output, thus preventing the medium from flowing back.

[0047] A sleeve 6 is installed at the top between valve body 1 and valve body 2. The sleeve 6 can be fixed by bolts or brackets. The valve stem 10 is located inside the sleeve 6 and extends through the sleeve 6 to the outside. A pull rod 8 is fixed at the top. An installation groove 13 is opened inside the sleeve 6. The installation groove 13 is mainly used to accommodate the resistance component 12 and the adjustment component 7.

[0048] Please see Figure 5 and Figure 6 The resistance assembly 12 also includes a pressure plate 122. The pressure plate 122, the rotating block 123 and the friction plate 121 are coaxially arranged. The pressure plate 122 is located above the friction plate 121. The outer surface of the friction plate 121 is wavy. A connecting ring 127 is fixedly installed on the top of the friction plate 121. The inner side of the pressure plate 122 has a slope 126 that is adapted to the friction plate 121. The connecting ring 127 is fixedly installed on the top of the inside of the pressure plate 122.

[0049] The resistance component 12 in this scheme is mainly used to increase the resistance when the valve stem 10 rotates. The rotating block 123 is fixed to the outer end of the valve stem 10. An inclined surface 125 is opened on the top of the rotating block 123. The inclined surface 125 is adapted to the friction plate 121. The friction plate 121, the pressure plate 122 and the rotating block 123 are coaxially arranged. The friction plate 121 and the pressure plate 122 are both sleeved on the outer end of the valve stem 10.

[0050] The friction disc 121 is shaped like a frustum, and its outer end is a regular, continuous, wavy, uneven shape. Multiple annular, equidistant grooves 124 are formed on the outer surface of the inclined surface 125 on the rotating block 123. The protruding edge of the friction disc 121 will fit into the inner side of the inclined groove 124. A connecting ring 127 is fixed at the top of the friction disc 121. An inclined surface 126 is formed inside the pressure plate 122. The friction disc 121 is fixed to the top of the pressure plate 122, which is inside the inclined surface 126, by the connecting ring 127.

[0051] When the friction disc 121 abuts against the inclined groove 124 on the rotating block 123, the adjusting component 7 presses the friction disc 121 downward, causing a slight deformation of the friction disc 121. The friction between the friction disc 121 and the inclined surface 125 increases the resistance when the valve stem 10 rotates. The protruding surface of the friction disc 121 is engaged with the inclined groove 124, which not only increases the rotational resistance but also creates segmented resistance when the valve stem 10 rotates. When the operator rotates the lever 8 to make the valve stem 10 drive the valve plate 9 to rotate and close, the resistance of the valve stem 10 rotation is increased, forcing the operator to take more time to close the butterfly valve. By extending the closing time, the impact force of the water hammer effect can be reduced. The segmented resistance can also increase the resistance to counteract the interference of external vibrations on the valve plate 9. For example, in ship pipelines and pipelines near pump rooms, this can prevent external vibrations from interfering with the valve plate 9, and cause the valve plate 9 to automatically rotate and open when it is closed due to prolonged vibration.

[0052] Please see Figure 4 , Figure 5 as well as Figure 7 The adjusting component 7 includes a rotating ring 71 and a slip ring 74. The inner side of the rotating ring 71 and the outer end of the sleeve 6 are provided with mutually compatible threads. The inner side of the rotating ring 71 is provided with an annular groove 72 that is compatible with the slip ring 74. The slip ring 74 is sleeved on the outer end of the sleeve 6 and is slidably connected to the annular groove 72.

[0053] The adjustment assembly 7 also includes a pressure plate 73. The outer end of the pressure plate 73 is fixedly installed with equidistantly distributed connecting blocks 75. The connecting blocks 75 pass through the movable groove 11 and are fixedly connected to the inner side of the slip ring 74. The pressure plate 73 is connected to the top of the pressure plate 122.

[0054] The adjusting component 7 in this scheme is mainly used to apply pressure to the resistance component 12, so that it can adjust the resistance when the valve stem 10 rotates. The outer end of the rotating ring 71 is fitted onto the outer end of the sleeve 6 and is threadedly connected to the outer end of the sleeve 6. An annular groove 72 is opened inside the rotating ring 71. The inner diameter of the slip ring 74 is slightly larger than the outer diameter of the sleeve 6 and is fitted onto the outer end of the sleeve 6 so that the thread cannot affect the up and down movement of the slip ring 74. At the same time, the slip ring 74 is also installed inside the annular groove 72 of the rotating ring 71 and is slidably connected to the annular groove 72. The pressure plate 73 is located in the mounting groove 1. Inside the sleeve 6, the pressure plate 73 is connected to the top of the pressure plate 122 by bolts or clips. At the same time, multiple annularly distributed connecting blocks 75 are fixed to the outer end of the pressure plate 73. The outer end of the sleeve 6 has a number of matching movable slots 11. The connecting blocks 75 pass through the movable slots 11 and are connected to the inner side of the slip ring 74. This arrangement not only allows the slip ring 74 to drive the pressure plate 73 to move up and down, but also allows the pressure plate 73 to be connected to the pressure plate 122 to restrict the friction plate 121, so that the friction plate 121 can only move up and down and cannot rotate.

[0055] By rotating the rotating ring 71 up and down, the slip ring 74 can drive the pressure plate 73 to move, and the pressure plate 73 will drive the pressure plate 122 and the friction plate 121 to move up and down, changing the friction force when the friction plate 121 and the rotating block 123 are in contact, so that the resistance when the valve stem 10 rotates can be adjusted according to the needs. For example, when resisting the interference of external vibration on the valve plate 9, the resistance can be increased.

[0056] Working principle: When it is necessary to increase the resistance when the valve stem 10 rotates, the rotating ring 71 is threaded to the outer end of the sleeve 6. The rotating ring 71 moves downward, causing the pressure plate 73 to drive the friction disc 121 to move. When the friction disc 121 abuts against the rotating block 123, the friction force can increase the resistance when the valve stem 10 rotates. The protruding surface of the friction disc 121 is engaged with the inclined groove 124, which not only increases the rotation resistance, but also makes the valve stem 10 rotate in segments. By extending the closing time, the impact force of the water hammer effect can be reduced. At the same time, the resistance when the valve stem 10 rotates can be adjusted according to the needs.

Claims

1. A butterfly valve-check valve, comprising a valve housing (1), a valve housing (2), and a check valve (5), characterized in that, Also includes: Valve stem (10), with a valve plate (9) fixedly installed at the bottom end of the valve stem (10), the valve stem (10) is used to drive the valve plate (9) to rotate to open and close the butterfly valve; The resistance assembly (12) includes a rotating block (123) and a friction disc (121). The rotating block (123) is fixedly installed on the outer end of the valve stem (10). The outer end of the rotating block (123) is provided with an inclined surface (125). The friction disc (121) is adapted to the inclined surface (125). The outer surface of the inclined surface (125) is provided with annularly distributed inclined grooves (124). The inclined grooves (124) are adapted to the friction disc (121). An adjustment component (7) is located above the resistance component (12), and the adjustment component (7) forces the friction disk (121) against the rotating block (123) by moving downward; The friction disc (121) abuts against the inclined plane (125) to increase the rotational resistance of the valve stem (10).

2. The butterfly valve and check valve as described in claim 1, characterized in that: The valve housing 1 (1) and valve housing 2 (2) are fixedly connected. The valve housing 3 (3) is fixedly installed on the other side of the valve housing 2 (2). The check valve (5) is located inside the valve housing 3 (3). The valve housing 1 (1) and valve housing 3 (3) are both fixedly installed with flanges (4) at opposite ends.

3. The butterfly valve and check valve as described in claim 1, characterized in that: A sealing bushing (14) is installed between the valve housing 1 (1) and the valve housing 2 (2). The sealing bushing (14) is fitted onto the outer end of the valve plate (9) to form a seal. A sleeve (6) is installed on the top of the valve housing 1 (1) and the valve housing 2 (2). An installation groove (13) is provided inside the sleeve (6). The adjusting component (7) and the resistance component (12) are both located inside the installation groove (13).

4. The butterfly valve and check valve as described in claim 3, characterized in that: The top of the valve stem (10) extends through the sleeve (6) to the outside and is fixedly installed with a pull rod (8). The outer end of the sleeve (6) is provided with annularly distributed movable grooves (11).

5. A butterfly valve-check valve according to claim 4, characterized in that: The resistance assembly (12) also includes a pressure plate (122). The pressure plate (122), the rotating block (123), and the friction plate (121) are coaxially arranged. The pressure plate (122) is located above the friction plate (121). The outer surface of the friction plate (121) is wavy. A connecting ring (127) is fixedly installed on the top of the friction plate (121). The inner side of the pressure plate (122) is provided with a second inclined surface (126) that is adapted to the friction plate (121). The connecting ring (127) is fixedly installed on the top of the inside of the pressure plate (122).

6. A butterfly valve-check valve according to claim 5, characterized in that: The adjusting assembly (7) includes a rotating ring (71) and a slip ring (74). The inner side of the rotating ring (71) and the outer end of the sleeve (6) are provided with mutually compatible threads. The inner side of the rotating ring (71) is provided with an annular groove (72) that is compatible with the slip ring (74). The slip ring (74) is sleeved on the outer end of the sleeve (6), and the slip ring (74) is slidably connected to the annular groove (72).

7. A butterfly valve-check valve according to claim 6, characterized in that: The adjustment assembly (7) also includes a pressure plate (73), and the outer end of the pressure plate (73) is fixedly installed with equidistantly distributed connecting blocks (75). The connecting blocks (75) pass through the movable groove (11) and are fixedly connected to the inner side of the slip ring (74). The pressure plate (73) is connected to the top of the pressure plate (122).

Images