Butterfly valve with lower limiting structure

Abstract

The utility model discloses a butterfly valve with a lower limit structure, which comprises a valve body, and a sealing element is fixedly mounted on the inner side of the valve body. According to the butterfly valve with the lower limiting structure, when the butterfly valve is used after being installed, a handle is rotated to drive a valve plate to turn over, the interior of a valve body is closed or is in a communication adjusting state, and in the process that the handle rotates to drive a valve rod to rotate, a fixing head, a supporting rod, a connecting plate, a locking bolt and a locking ring can be driven to rotate in a follow-up mode at the same time; after the valve plate is rotated to the closing or opening position through the valve rod, the arranged locking ring can be screwed outside the locking bolt on the right side of the connecting plate, the connecting plate can abut against and be fixed to the arc-shaped plate through the locking bolt and the locking ring, and therefore the positions of the fixing head and the valve rod can be locked and limited through the supporting rod; the situation that rotation is caused by mistaken touch is reduced, and the problem that auxiliary locking and limiting are inconvenient to conduct when the butterfly valve is used is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a butterfly valve with a lower limit structure. Background Art

[0002] A valve is a pipeline accessory used to open and close pipelines, control flow direction, and adjust and control the parameters of the conveying medium. It has functions such as shut-off, regulation, diversion, prevention of backflow, pressure stabilization, diversion or overflow pressure relief. It can be divided into check valves, regulating valves, and shut-off valves according to left and right. Butterfly valves are a common type of regulating valve, also known as flap valves. They are mainly opened and closed by the rotation of the internal disc-shaped valve disc or butterfly plate around the valve shaft. They are widely used due to their simple structure and convenient opening and closing methods.

[0003] However, when the butterfly valve is installed on the pipeline and used, there is no locking limit measure when the butterfly valve is in the closed or open state. If it is touched by mistake, it will cause the butterfly valve to open or close unexpectedly, causing the liquid inside the pipeline to suddenly connect or interrupt the closure. There are some safety hazards and deficiencies, and it is not convenient to perform auxiliary locking and limiting when the butterfly valve is in use.

[0004] Now, a new butterfly valve with a lower limit structure is proposed to solve the above-mentioned shortcomings. Utility Model Content

[0005] The utility model aims to provide a butterfly valve with a lower limit structure to solve the problem inconvenient to perform auxiliary locking and limiting when the butterfly valve is used, as mentioned in the background art.

[0006] To achieve the above object, the utility model provides the following technical solutions: a butterfly valve with a lower limit structure, comprising a valve body, a sealing member is fixedly installed on the inner side of the valve body, a valve stem is vertically penetrated inside the sealing member, a valve plate is fixedly installed on the outer side of the valve stem, and a limit structure for locking and limiting the open position of the butterfly valve is arranged at the bottom end of the valve body;

[0007] The limiting structure includes an arc-shaped plate, a connecting plate, a locking ring, an arc-shaped movable groove, a support rod, a locking bolt and a fixed head. The bottom end of the valve stem passes through the bottom end of the valve body and is welded and fixed with a fixed head, and the inside of the fixed head passes through and is fixed with a support rod. A connecting plate is welded and fixed to the right side of the outside of the support rod, and a through hole is provided inside the connecting plate. An arc-shaped plate is welded and fixed to the right side of the bottom end of the valve body, and an arc-shaped movable groove is provided inside the arc-shaped plate. A locking bolt is provided on the right side of the inside of the arc plate, and a locking ring is provided on the right side of the connecting plate.

[0008] Preferably, the arc-shaped movable groove passes through the interior of the arc-shaped plate, and the right side of the locking bolt passes through the interior of the arc-shaped movable groove and the connecting plate respectively.

[0009] Preferably, the outside of the locking ring is provided with an internal thread that matches the external thread of the locking bolt.

[0010] Preferably, guard plates are respectively provided on both sides of the exterior of the valve body, and fixing blocks are respectively welded and fixed at the middle positions of both sides of the valve body.

[0011] Preferably, a connecting bolt is provided on the left side of the guard plate, and the connecting bolt passes through the interior of the guard plate, and a screw hole is opened inside the left side of the fixing block.

[0012] Preferably, a shell is provided at the top of the valve body, and a top cover is hingedly installed at the top of the shell, a through groove is opened inside the bottom end of the shell, the top of the valve body passes through the inside of the through groove, the top of the valve stem passes through the top of the valve body and a handle is installed and fixed, and support feet are welded and fixed on both sides of the bottom end of the shell, and mounting bolts are provided on the support feet.

[0013] Preferably, connecting blocks are respectively welded and fixed on both sides of the top end of the valve body, and a mounting hole is opened inside the top end of the connecting block.

[0014] Preferably, mounting flanges are respectively welded and fixed at both ends of the exterior of the valve body.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: the butterfly valve with the lower limit structure not only realizes the auxiliary locking limit when the butterfly valve is used, realizes the anti-collision protection of the outside of the butterfly valve, but also realizes the waterproof and dustproof of the outside of the butterfly valve operating component;

[0016] (1) By providing a valve body, a handle, a valve plate, a valve stem, an arc plate, a connecting plate, a locking ring, an arc-shaped movable groove, a support rod, a locking bolt and a fixed head, when the butterfly valve is installed and used, when the handle is turned to drive the valve plate to flip, and the inside of the valve body is closed or connected to adjust the state, the handle is turned to drive the valve stem to rotate, and the fixed head, the support rod and the connecting plate as well as the locking bolt and the locking ring can be driven to rotate with it. After the valve plate is rotated to a closed or open position by the valve stem, the locking ring provided on the right side of the connecting plate can be tightened on the outside of the locking bolt. The connecting plate can be pressed and fixed on the arc plate by using the locking bolt and the locking ring, so that the position of the fixed head and the valve stem can be locked and limited by the support rod to reduce the situation of accidental rotation. When the valve plate needs to be operated, the locking ring is first loosened, and after the connecting plate is unlocked on the right side of the arc plate, the handle can be turned to perform the opening and closing operation;

[0017] (2) By providing a valve body, a guard plate, a fixing block, a screw hole and a valve body, when the butterfly valve is connected to a pipeline, the guard plates provided can be respectively installed and fixed on the fixing block on one side of the valve body by connecting bolts on both sides of the outside of the valve body. The two sets of guard plates provided can provide auxiliary anti-collision safety protection for the outside of the butterfly valve, thereby reducing damage to the outside of the butterfly valve;

[0018] (3) By providing a valve body, a handle, a valve stem, a connecting block, a support foot, a shell, a top cover, mounting bolts and a through groove, when the butterfly valve is installed and used, the top end of the valve body can be first passed through the interior of the through groove at the bottom end of the shell, and then the shell is fixed to the top end of the connecting block by using two sets of support feet and mounting bolts. Then, the handle is fixed to the top end of the valve stem and rotated back and forth for use. The shell and top cover can be used to assist in sealing the outside of the handle on the top of the valve body, thereby preventing water and dust, and reducing the rust damage of the external operating components of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0020] Figure 2 For this utility model Figure 1 A is an enlarged structural diagram;

[0021] Figure 3 It is a schematic diagram of a partially enlarged structure of the arc-shaped movable groove of the utility model when viewed from above;

[0022] Figure 4 It is a schematic diagram of the enlarged structure of the shell of the utility model when viewed from top.

[0023] In the figure: 1. Mounting flange; 2. Valve body; 3. Guard plate; 4. Fixing block; 5. Seal; 6. Connecting block; 7. Support foot; 8. Housing; 9. Top cover; 10. Handle; 11. Mounting bolt; 12. Valve plate; 13. Valve stem; 14. Arc plate; 15. Connecting plate; 16. Locking ring; 17. Arc movable groove; 18. Support rod; 19. Locking bolt; 20. Fixing head; 21. Screw hole; 22. Connecting bolt; 23. Through groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1: Please refer to Figure 1-4A butterfly valve with a lower limit structure comprises a valve body 2, a sealing member 5 is fixedly installed on the inner side of the valve body 2, a valve stem 13 is vertically penetrated inside the sealing member 5, a valve plate 12 is fixedly installed outside the valve stem 13, mounting flanges 1 are respectively welded and fixed at both ends of the outer side of the valve body 2, and a limit structure for locking and limiting the open position of the butterfly valve is arranged at the bottom end of the valve body 2;

[0026] The limiting structure includes an arc plate 14, a connecting plate 15, a locking ring 16, an arc-shaped movable groove 17, a support rod 18, a locking bolt 19 and a fixed head 20. The bottom end of the valve stem 13 passes through the bottom end of the valve body 2 and is welded and fixed with the fixed head 20, and the support rod 18 is passed through and fixed inside the fixed head 20. The connecting plate 15 is welded and fixed on the right side of the outside of the support rod 18, and a through hole is opened inside the connecting plate 15. The arc plate 14 is welded and fixed on the right side of the bottom end of the valve body 2, and the arc-shaped movable groove 17 is opened inside the arc plate 14. The locking bolt 19 is arranged on the right side of the inside of the arc plate 14, and the locking ring 16 is arranged on the right side of the connecting plate 15.

[0027] The arc-shaped movable groove 17 penetrates the interior of the arc-shaped plate 14, the right side of the locking bolt 19 penetrates the interior of the arc-shaped movable groove 17 and the connecting plate 15 respectively, and the outer portion of the locking ring 16 is provided with an inner thread that matches the outer thread of the locking bolt 19;

[0028] Specifically, Figure 1-Figure 3 As shown, when the handle 10 is turned to drive the valve plate 12 to flip and the interior of the valve body 2 is closed or connected, the handle 10 can drive the valve stem 13 to rotate, and at the same time, the fixed head 20, the support rod 18 and the connecting plate 15 as well as the locking bolt 19 and the locking ring 16 can be driven to rotate. After the valve plate 12 is rotated to a closed or open position by using the valve stem 13, the locking ring 16 set on the right side of the connecting plate 15 can be tightened on the outside of the locking bolt 19. The connecting plate 15 can be fixed on the arc plate 14 by using the locking bolt 19 and the locking ring 16, so that the support rod 18 can be used to lock and limit the position of the fixed head 20 and the valve stem 13 to reduce the possibility of accidental rotation.

[0029] Embodiment 2: Guard plates 3 are respectively provided on both sides of the exterior of the valve body 2, and fixing blocks 4 are respectively welded and fixed at the middle positions of both sides of the valve body 2. A connecting bolt 22 is provided on the left side of the guard plate 3, and the connecting bolt 22 passes through the interior of the guard plate 3. A screw hole 21 is opened inside the left side of the fixing block 4;

[0030] Specifically, Figure 1 and Figure 3 As shown, when the butterfly valve is used to connect a pipeline, the guard plates 3 can be installed and fixed on the fixing blocks 4 on one side of the valve body 2 using connecting bolts 22 on both sides of the outside of the valve body 2. The two sets of guard plates 3 can then provide auxiliary anti-collision safety protection for the outside of the butterfly valve.

[0031] Embodiment 3: A housing 8 is provided at the top of the valve body 2, and a top cover 9 is hingedly installed at the top of the housing 8. A through slot 23 is provided inside the bottom of the housing 8. The top of the valve body 2 passes through the inside of the through slot 23. The top of the valve stem 13 passes through the top of the valve body 2 and is fixed with a handle 10. Support legs 7 are welded and fixed on both sides of the bottom of the housing 8, and mounting bolts 11 are penetrated on the support legs 7. Connecting blocks 6 are welded and fixed on both sides of the top of the valve body 2, and a mounting hole is provided inside the top of the connecting block 6.

[0032] Specifically, Figure 1 and Figure 4 As shown, the top of the valve body 2 can be first passed through the interior of the through groove 23 at the bottom end of the shell 8, and then the shell 8 can be fixed to the top of the connecting block 6 by using two sets of legs 7 and mounting bolts 11. Then, the handle 10 can be fixed to the top of the valve stem 13 for use by rotating it back and forth. The outer cover 8 and top cover 9 provided can be used to assist in sealing the outside of the handle 10 at the top of the valve body 2 to prevent water and dust.

[0033] Working principle: When the utility model is used after installation, when the handle 10 is turned to drive the valve plate 12 to flip, and the inside of the valve body 2 is closed or connected, the handle 10 rotates to drive the valve stem 13 to rotate, and the fixed head 20, the support rod 18 and the connecting plate 15 as well as the locking bolt 19 and the locking ring 16 can be driven to rotate with it. After the valve plate 12 is rotated to the closed or open position by the valve stem 13, the locking ring 16 set on the right side of the connecting plate 15 can be tightened on the outside of the locking bolt 19. The connecting plate 15 can be fixed on the arc plate 14 by using the locking bolt 19 and the locking ring 16, so that the position of the fixed head 20 and the valve stem 13 can be locked and limited by the support rod 18. When the valve plate 12 needs to be operated, the locking ring 16 is first loosened, and the connecting plate 1 After unlocking the right side of the arc plate 14, the handle 10 can be turned to open and close. When the butterfly valve is installed and used, the top of the valve body 2 can be passed through the inside of the through groove 23 at the bottom of the shell 8, and then the shell 8 is fixed to the top of the connecting block 6 by two sets of legs 7 and mounting bolts 11. Then, the handle 10 is fixed to the top of the valve stem 13 for forward and backward rotation. The outer cover 8 and the top cover 9 can be used to assist the outer cover sealing of the handle 10 on the top of the valve body 2 to prevent water and dust. When the butterfly valve is used to connect the pipeline, the guard plates 3 can be respectively installed and fixed on the fixing block 4 on one side of the valve body 2 by the connecting bolts 22 on both sides of the outer side of the valve body 2. The two sets of guard plates 3 can be used to assist the outer side of the butterfly valve in anti-collision safety protection.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A butterfly valve with a lower limit structure, comprising a valve body (2), characterized in that: A sealing member (5) is fixedly mounted on the inner side of the valve body (2), a valve stem (13) is vertically penetrated inside the sealing member (5), a valve plate (12) is fixedly mounted outside the valve stem (13), and a limiting structure for locking and limiting the open position of the butterfly valve is provided at the bottom end of the valve body (2); The limiting structure comprises an arc-shaped plate (14), a connecting plate (15), a locking ring (16), an arc-shaped movable groove (17), a support rod (18), a locking bolt (19) and a fixed head (20); the bottom end of the valve stem (13) passes through the bottom end of the valve body (2) and is welded and fixed with the fixing head (20); the inside of the fixed head (20) passes through and is fixed with the support rod (18); the right side of the outside of the support rod (18) is welded and fixed with the connecting plate (15); the inside of the connecting plate (15) is provided with a through hole; the right side of the bottom end of the valve body (2) is welded and fixed with the arc-shaped plate (14); the inside of the arc-shaped movable groove (17) is provided with the locking bolt (19); the right side of the inside of the arc-shaped plate (14) is provided with a locking bolt (19); the right side of the inside of the connecting plate (15) is provided with a locking ring (16).

2. A butterfly valve with a lower limit structure according to claim 1, characterized in that: The arc-shaped movable groove (17) passes through the interior of the arc-shaped plate (14), and the right side of the locking bolt (19) passes through the interior of the arc-shaped movable groove (17) and the connecting plate (15) respectively.

3. The butterfly valve with a lower limit structure according to claim 1, characterized in that: The lock ring (16) is provided with an internal thread on the outside thereof which matches the external thread of the locking bolt (19).

4. The butterfly valve with a lower limit structure according to claim 1, characterized in that: Guard plates (3) are respectively provided on both sides of the exterior of the valve body (2), and fixing blocks (4) are respectively welded and fixed at the middle positions of both sides of the valve body (2).

5. The butterfly valve with a lower limit structure according to claim 4, characterized in that: A connecting bolt (22) is provided on the left side of the guard plate (3), and the connecting bolt (22) passes through the inside of the guard plate (3). A screw hole (21) is provided inside the left side of the fixing block (4).

6. The butterfly valve with a lower limit structure according to claim 1, characterized in that: The top end of the valve body (2) is provided with a shell (8), and the top end of the shell (8) is hingedly mounted with a top cover (9), the bottom end of the shell (8) is provided with a through groove (23), the top end of the valve body (2) passes through the inside of the through groove (23), the top end of the valve stem (13) passes through the top end of the valve body (2) and is fixedly mounted with a handle (10), and the two sides of the bottom end of the shell (8) are respectively welded and fixed with support feet (7), and the support feet (7) are penetrated by mounting bolts (11).

7. The butterfly valve with a lower limit structure according to claim 1, characterized in that: Connecting blocks (6) are respectively welded and fixed on both sides of the top end of the valve body (2), and a mounting hole is provided inside the top end of the connecting block (6).

8. The butterfly valve with a lower limit structure according to claim 1, characterized in that: Mounting flanges (1) are respectively welded and fixed at both ends of the exterior of the valve body (2).

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