Stainless steel turbine butterfly valve

Abstract

The utility model discloses a stainless steel turbine butterfly valve which comprises a butterfly valve body, a connecting flange is fixedly installed at the water inlet end of the butterfly valve body, a buffering assembly is installed on the outer side of the connecting flange, the buffering assembly comprises a fixing flange fixed to the connecting flange in a threaded connection mode, and the end of the fixing flange is fixed to a buffering pipe in a welded mode. And a pipeline fixing flange is welded at one end of the buffer pipe away from the fixing flange. According to the stainless steel turbine butterfly valve, when the stainless steel butterfly valve body is suddenly closed, the flow rate of water flow in the buffer pipe is reduced, the sealing seat is clamped in the sealing opening under reset rebound of the spring, the impact force of the water flow impacting the valve plate in the butterfly valve body is reduced, and the buffer assembly can relieve reverse impact of the water flow; therefore, the influence of the water hammer effect on the butterfly valve body is reduced; the check valve can reduce the damage of the water hammer to the pipeline and the valve, improves the stability of the system, improves the sealing performance of the butterfly valve body, and prolongs the service life of the butterfly valve body.

Description

Technical Field

[0001] The utility model relates to the field of turbine butterfly valves, and specifically relates to a stainless steel turbine butterfly valve. Background Technique

[0002] The stainless steel turbine butterfly valve mainly includes the following devices:

[0003] Valve body: It is the main part of the valve, used to accommodate and guide the fluid;

[0004] Valve plate: Used to control the on-off and flow regulation of the fluid;

[0005] Turbine device: Through turbine transmission, the operation is more labor-saving and precise;

[0006] Valve stem: Connects the valve plate and the turbine device to transmit power;

[0007] Seal: Ensures the sealing performance of the valve when it is closed to prevent fluid leakage;

[0008] The working principle of the stainless steel turbine butterfly valve is as follows:

[0009] When the turbine device rotates, it drives the valve plate to rotate through the valve stem; the valve plate rotates in the valve body to realize the opening and closing of the valve; in the open state, the valve plate is parallel to the fluid flow direction, and the fluid can flow smoothly through the valve body; in the closed state, the valve plate is perpendicular to the fluid flow direction, blocking the fluid flow;

[0010] When the stainless steel turbine butterfly valve is closed, a water hammer effect is likely to occur at its water inlet.

[0011] A strong water hammer impact will cause damage to the butterfly valve itself, such as valve plate deformation, valve stem fracture, seal failure, etc.; taking the pipeline system in chemical production as an example, if the stainless steel turbine butterfly valve is damaged due to water hammer, it may lead to the leakage of chemical raw materials, triggering safety accidents and environmental pollution. Content of the Utility Model

[0012] The purpose of the utility model is to provide a stainless steel turbine butterfly valve to solve the defects mentioned in the above background technique.

[0013] To achieve the above purpose, a stainless steel turbine butterfly valve is provided, including a butterfly valve body. A connecting flange is fixedly installed at the water inlet end of the butterfly valve body, and a buffer assembly is installed outside the connecting flange. The buffer assembly includes a fixed flange screwed and fixed on the connecting flange. The end of the fixed flange is welded and fixed to a buffer pipe. At the same time, the end of the buffer pipe far from the fixed flange is welded and fixed to a pipe flange, and the pipe flange is communicated with an external liquid inlet pipe. A one-way seat is fixedly installed on the left side inside the buffer pipe, and a sealing seat is installed on one side of the one-way seat. At the same time, a guide rod is fixedly installed on the right surface of the sealing seat, and the guide rod passes through a guide hole opened in the middle of a fixing piece.

[0014] Preferably, the connection flange and the fixed flange have the same diameter, and are fixed by five groups of bolts, and are sealed by a gasket between the connection flange and the fixed flange.

[0015] Preferably, a water inlet hole is opened inside the one-way seat, and a sealing port is opened on one side of the water inlet hole. At the same time, the size of the sealing port is adapted to that of the sealing seat, and the sealing seat is clamped inside the sealing port.

[0016] Preferably, a stress groove is opened on the left surface of the sealing seat, and three limit rods are evenly installed on the right surface of the sealing seat.

[0017] Preferably, three connecting pieces are evenly installed on the outside of the fixing piece, and the fixing piece is fixedly connected to the inner wall of the buffer pipe through the connecting pieces on the outside.

[0018] Preferably, the fixing piece and the sealing seat are arranged in parallel, a spring is installed between the fixing piece and the sealing seat, and the spring is sleeved on the outside of the guide rod.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows: when the stainless steel butterfly valve body is suddenly closed, the water flow rate inside the buffer pipe decreases. Under the reset and rebound of the spring, the sealing seat is clamped inside the sealing port, reducing the impact force of the water flow impacting the valve plate inside the butterfly valve body. The buffer assembly can slow down the reverse impact of the water flow, thereby reducing the impact of the water hammer effect on the butterfly valve body; the presence of the check valve can reduce the damage of the water hammer to the pipeline and the valve, improve the stability of the system, and at the same time improve the sealing performance and service life of the butterfly valve body. Description of the Drawings

[0020] Figure 1 is a front view schematic diagram of the structure of the present utility model;

[0021] Figure 2 is the structure of the present utility model Figure 1 bottom view;

[0022] Figure 3 is the structure of the present utility model Figure 1 rear view;

[0023] Figure 4 is a schematic diagram of the buffer assembly of the structure of the present utility model.

[0024] Reference numerals in the figures: 1, butterfly valve body; 2, connection flange; 3, buffer assembly; 30, gasket; 31, fixed flange; 32, buffer pipe; 33, one-way seat; 331, sealing port; 34, pipe flange; 35, water inlet hole; 36, connecting piece; 37, fixing piece; 38, guide rod; 39, limit rod; 40, spring; 41, sealing seat; 42, stress groove. Detailed implementation mode

[0025] Please refer to Figures 1-4 As shown in the figure, the utility model provides a stainless steel turbine butterfly valve, which comprises a butterfly valve body 1. A connecting flange 2 is fixedly installed at the water inlet end of the butterfly valve body 1, and a buffer assembly 3 is installed on the outer side of the connecting flange 2. The buffer assembly 3 comprises a fixed flange 31 screwed and fixed on the connecting flange 2. The end of the fixed flange 31 is fixedly welded to a buffer pipe 32. At the same time, one end of the buffer pipe 32 far away from the fixed flange 31 is fixedly welded to a pipe flange 34, and the pipe flange 34 is communicated with an external liquid inlet pipe. A one-way seat 33 is fixedly installed on the left side inside the buffer pipe 32, and a sealing seat 41 is installed on one side of the one-way seat 33. At the same time, a guide rod 38 is fixedly installed on the right surface of the sealing seat 41, and the guide rod 38 passes through a guide hole formed in the middle of a fixing piece 37.

[0026] Working principle: The buffer assembly 3 is installed at the water inlet end of the butterfly valve body 1. With the setting of the buffer assembly 3, when the stainless steel butterfly valve body 1 is suddenly closed, the water flow rate inside the buffer pipe 32 decreases. Under the reset and rebound of a spring 40, the sealing seat 41 is stuck inside a sealing port 331, reducing the impact force of the water flow impacting on the valve plate inside the butterfly valve body 1. The buffer assembly 3 can slow down the reverse impact of the water flow, thereby reducing the influence of the water hammer effect on the butterfly valve body 1. The presence of the check valve can reduce the damage of the water hammer to the pipeline and the valve, improve the stability of the system, and at the same time improve the sealing performance and service life of the butterfly valve body 1.

[0027] As a preferred implementation mode, the diameters of the connecting flange 2 and the fixed flange 31 are the same, and the connecting flange 2 and the fixed flange 31 are fixed by five groups of bolts. At the same time, the connecting flange 2 and the fixed flange 31 are sealed by a gasket 30.

[0028] As Figures 1-4 shown: An inlet hole 35 is formed inside the one-way seat 33, and a sealing port 331 is formed on one side of the inlet hole 35. At the same time, the sealing port 331 is adapted to the size of the sealing seat 41, and the sealing seat 41 is clamped inside the sealing port 331.

[0029] When the butterfly valve body 1 is in an open state, water flows into the buffer pipe 32. The water flow impacts on the outer surface of the sealing seat 41 through the inlet hole 35 and overcomes the elastic force of the spring 40. The water body passes through the butterfly valve body 1 to perform normal medium flow work.

[0030] As a preferred implementation mode, a stress groove 42 is formed on the left surface of the sealing seat 41, and three groups of limiting rods 39 are evenly installed on the right surface of the sealing seat 41.

[0031] Three sets of connecting pieces 36 are evenly installed on the outer side of the fixing piece 37, and the fixing piece 37 is fixedly connected to the inner wall of the buffer tube 32 through the connecting pieces 36 on the outer side.

[0032] The fixing piece 37 and the sealing seat 41 are arranged in parallel, and a spring 40 is installed between the fixing piece 37 and the sealing seat 41. At the same time, the spring 40 is sleeved on the outer side of the guide rod 38.

[0033] As Figures 1-4 shown: When the sealing seat 41 moves horizontally under force, a guide rod 38 and three sets of limiting rods 39 are installed on it. The guide rod 38 and the limiting rods 39 are inserted into the holes formed in the fixing piece 37, which can limit and guide the horizontally moving sealing seat 41 to ensure the stability of the sealing seat 41 during movement; the fixing piece 37 and the sealing seat 41 are connected by a spring 40.

Claims

1. A stainless steel turbine butterfly valve, comprising a butterfly valve body (1), characterized in that: The water inlet end of the butterfly valve body (1) is fixedly mounted with a connecting flange (2), and a buffer assembly (3) is mounted on the outer side of the connecting flange (2). The buffer assembly (3) comprises a fixing flange (31) fixedly mounted on the connecting flange (2) by screw connection, and the end of the fixing flange (31) is fixedly welded to a buffer pipe (32), and a fixing pipe flange (34) is welded to the end of the buffer pipe (32) away from the fixing flange (31), and the pipe flange (34) is connected to an external liquid inlet pipe, a one-way seat (33) is fixedly mounted on the left side of the inside of the buffer pipe (32), and a sealing seat (41) is mounted on one side of the one-way seat (33), and a guide rod (38) is fixedly mounted on the right side surface of the sealing seat (41), and the guide rod (38) passes through a guide hole opened in the middle of a fixing plate (37).

2. A stainless steel turbine butterfly valve according to claim 1, characterized in that: The connecting flange (2) and the fixing flange (31) have the same diameter, and the connecting flange (2) and the fixing flange (31) are fixed by five sets of bolts, and the connecting flange (2) and the fixing flange (31) are sealed by a sealing gasket (30).

3. A stainless steel turbine butterfly valve according to claim 1, characterized in that: The one-way seat (33) has a water inlet hole (35) formed inside, and a sealing opening (331) formed on one side of the water inlet hole (35). The sealing opening (331) is matched to the size of the sealing seat (41), and the sealing seat (41) is clamped inside the sealing opening (331).

4. A stainless steel turbine butterfly valve according to claim 1, characterized in that: A force bearing groove (42) is provided on the left surface of the sealing seat (41), and three groups of limiting rods (39) are evenly installed on the right surface of the sealing seat (41).

5. The stainless steel turbine butterfly valve according to claim 1, characterized in that: Three groups of connecting plates (36) are evenly installed on the outer side of the fixing plate (37), and the fixing plate (37) is fixedly connected to the inner wall of the buffer tube (32) through the outer connecting plates (36).

6. A stainless steel turbine butterfly valve according to claim 1, characterized in that: The fixing plate (37) and the sealing seat (41) are arranged in parallel, and a spring (40) is installed between the fixing plate (37) and the sealing seat (41), and the spring (40) is sleeved on the outer side of the guide rod (38).

Images