Water hammer impact prevention ball valve

Abstract

The utility model discloses a water hammer impact prevention ball valve which is provided with a transmission unit and a resistance unit, when the rotating speed of a ball needs to be slowed down and collision of a pipeline and a valve body caused by a water hammer effect due to too fast closing is avoided, a driven rotating rod and a driven gear are rotated, and the size of the driven gear is far smaller than that of a driving gear; a driven gear is rotated to drive a main gear to rotate slowly, so that a main rotating rod drives a ball to rotate slowly, and the situation that the ball is closed too fast, pressure in a closed pipeline system rises rapidly due to water flow inertia, and pipelines and equipment are damaged is avoided; when the main rotating rod drives the ball body to gradually rotate and close, the extrusion seat moves upwards along the gradient of the main rotating rod at the moment, so that the extrusion seat compresses the spring, and under the rebound of the spring, the extrusion force of the extrusion seat to the contact seat changes the force required by the rotation of the ball body, so that the closing speed of the ball body is slowed down; and the water hammer effect is relieved.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, specifically to a ball valve designed to prevent water hammer impact. Background Technology

[0002] The opening and closing element of a ball valve is a ball with a circular through hole. This ball is connected to the valve stem. When the handle rotates the valve stem, the ball also rotates. After the ball rotates 90 degrees, it changes the shape of the channel inside the valve body, thereby opening or closing the valve. The hole on the ball will be aligned with or offset from the channel of the valve body, thereby realizing the flow of fluid.

[0003] When a ball valve closes, the sudden closure causes water flow inertia, which exerts pressure on the valve and pipe wall. Because the pipe wall is smooth, the subsequent water flow, under inertia, rapidly reaches its maximum hydraulic pressure, leading to a rapid increase in pressure within the closed pipeline system and causing damage to the pipeline and equipment. This application addresses this by slowing down the valve body's rotation speed to prevent water hammer from causing collisions between the valve body and the pipeline due to excessively rapid closure. Furthermore, it alters the force required for valve body rotation during closure, thereby slowing down the closing speed and mitigating the water hammer effect. This invention proposes a water hammer-resistant ball valve. Utility Model Content

[0004] The purpose of this invention is to provide a waterproof hammer impact ball valve to solve the problems mentioned in the background art.

[0005] A water hammer impact ball valve includes a valve body and a ball rotatably connected in the valve body. A transmission unit is provided between the valve body and the ball. The transmission unit includes:

[0006] The main rotating rod is fixedly connected to the top end face of the ball, and the main rotating rod is rotatably connected to the inner wall of the valve body;

[0007] The main gear is sleeved on the outer wall of the main rotating rod;

[0008] The driven gear meshes with the main gear, and the driven gear is used to drive the main gear and the main rotating rod to rotate, thereby adjusting the ball to open and close;

[0009] A drive rod is inserted into the inner wall of the driven gear, and the drive rod is used to drive the driven gear to rotate.

[0010] Preferably, a mounting cover is installed on the top end face of the valve body, and the main rotating rod and the driven rotating rod are rotatably connected to the inner wall of the mounting cover.

[0011] Preferably, a connecting seat is fixedly connected to the top end face of the rotating rod.

[0012] Preferably, the mounting cover is provided with a resistance unit, the resistance unit comprising:

[0013] A resistance assembly is disposed on the top end face of the main rotating rod;

[0014] A contact seat is fixedly connected to the top end face of the mounting cover, and the contact seat is positioned below the resistance assembly.

[0015] Preferably, the contact seat is provided with an arc-shaped slope.

[0016] Preferably, the resistance component includes:

[0017] A fixed base is fixedly connected to the top end face of the main rotating rod;

[0018] The sliding rod is slidably connected to the inner wall of the fixed base;

[0019] The compression seat is fixedly connected to the bottom end face of the sliding rod, and the bottom end face of the compression seat is in contact with the top of the contact seat.

[0020] Preferably, a spring is fixedly connected to the top end face of the compression seat, and the other end of the spring is fixedly connected to the fixed seat.

[0021] By adopting the above technical solution, the rotation speed of the valve body is reduced, thus avoiding the water hammer effect that could cause collisions between the pipeline and the valve body due to excessively rapid closure. At the same time, when the valve is closed, the force required for the valve body to rotate is changed, thereby reducing the closing speed of the valve body and thus mitigating the water hammer effect.

[0022] Compared with the prior art, the beneficial effects of this utility model are: the waterproof hammer impact ball valve,

[0023] Equipped with a transmission unit and a resistance unit, when it is necessary to slow down the rotation speed of the ball to prevent water hammer from colliding with the pipes and valve body due to excessively rapid closure, the handle is inserted into the connecting seat, driving the driven rotating rod and the driven gear to rotate. The driven gear is much smaller than the main gear. By rotating the driven gear, the main gear is driven to rotate slowly, which in turn slows down the rotation speed of the ball driven by the main rotating rod, preventing the ball from closing too quickly. This would cause a rapid increase in pressure in the closed pipeline system due to the inertia of the water flow, which would damage the pipes and equipment. When the main rotating rod drives the ball to gradually rotate and close, the squeezing seat moves upward along the slope of the main rotating rod, causing the squeezing seat to compress the spring. Under the rebound of the spring, the squeezing seat exerts a squeezing force on the contact seat, thereby changing the force required for the ball to rotate, thus slowing down the closing speed of the ball and mitigating the water hammer effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0025] Figure 2This is a schematic diagram of the internal structure of the valve body in this embodiment;

[0026] Figure 3 This is a schematic diagram of the transmission unit structure in this embodiment;

[0027] Figure 4 This is a schematic diagram of the resistance component in this embodiment.

[0028] In the diagram: 1. Valve body; 11. Mounting cover; 2. Ball; 3. Transmission unit; 31. Main rotating rod; 32. Main gear; 33. Driven gear; 34. Driven rotating rod; 35. Connecting seat; 4. Resistance unit; 41. Resistance assembly; 411. Fixed seat; 412. Sliding rod; 413. Pressing seat; 414. Spring; 42. Contact seat. Detailed Implementation

[0029] 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.

[0030] Example 1:

[0031] Please see Figure 1-4 This utility model provides a technical solution: a water hammer impact ball valve, comprising a valve body 1 and a ball 2 rotatably connected in the valve body 1, and a transmission unit 3 is provided between the valve body 1 and the ball 2, the transmission unit 3 comprising:

[0032] The main rotating rod 31 is fixedly connected to the top end face of the ball 2, and the main rotating rod 31 is rotatably connected to the inner wall of the valve body 1;

[0033] The main gear 32 is sleeved on the outer wall of the main rotating rod 31;

[0034] Driven gear 33 meshes with main gear 32. Driven gear 33 drives main gear 32 and main rotating rod 31 to rotate, and adjusts ball 2 to open and close.

[0035] The rotating rod 34 is inserted into the inner wall of the driven gear 33 and is used to drive the driven gear 33 to rotate.

[0036] A mounting cover 11 is installed on the top end face of the valve body 1, and the main rotating rod 31 and the driven rotating rod 34 are rotatably connected to the inner wall of the mounting cover 11.

[0037] A connecting seat 35 is fixedly connected to the top end face of the rotating rod 34. Slots are provided on the top end faces of both the connecting seat 35 and the main rotating rod 31. The slots are used to insert a handle. By driving the main rotating rod 31 to rotate through the handle, the ball 2 can be driven to rotate to open and close.

[0038] When it is necessary to slow down the rotation speed of ball 2 to avoid water hammer effect caused by closing too quickly and causing collision between the pipe and valve body 1, the handle is inserted into the connecting seat 35 to drive the rotating rod 34 and the gear 33 to rotate.

[0039] The size of the driven gear 33 is much smaller than that of the main gear 32. By rotating the driven gear 33, the main gear 32 is driven to rotate slowly, which in turn slows down the rotation speed of the main rotating rod 31 and the ball 2. This prevents the ball 2 from closing too quickly, which would cause the pressure in the closed pipeline system to rise rapidly due to the inertia of the water flow and damage the pipeline and equipment.

[0040] Example 2:

[0041] Please see Figure 1-4 The mounting cover 11 is provided with a resistance unit 4, which includes:

[0042] Resistance assembly 41 is disposed on the top end face of the main rotating rod 31;

[0043] The contact seat 42 is fixedly connected to the top end face of the mounting cover 11 and is located below the resistance assembly 41.

[0044] The contact seat 42 is provided with an arc-shaped slope.

[0045] Resistance component 41 includes:

[0046] The fixed base 411 is fixedly connected to the top end face of the main rotating rod 31;

[0047] The sliding rod 412 is slidably connected to the inner wall of the fixed base 411;

[0048] The extrusion seat 413 is fixedly connected to the bottom end face of the sliding rod 412, and the bottom end face of the extrusion seat 413 is in contact with the top of the contact seat 42.

[0049] When the pressing seat 413 contacts and presses against the contact seat 42, it limits the force required for the main rotating rod 31 to drive the ball 2 to rotate.

[0050] A spring 414 is fixedly connected to the top end face of the compression seat 413, and the other end of the spring 414 is fixedly connected to the fixed seat 411.

[0051] When the main rotating rod 31 drives the ball 2 to gradually rotate and close, the pressing seat 413 moves upward along the slope of the main rotating rod 31, so that the pressing seat 413 compresses the spring 414. Under the rebound of the spring 414, the pressing force of the pressing seat 413 on the contact seat 42 is increased, thereby changing the force required for the ball 2 to rotate, thus slowing down the closing speed of the ball 2 and thus reducing the water hammer effect.

Claims

1. A ball valve protected against hammering, comprising a valve body (1) and a ball (2) which is rotatably connected in the valve body (1), characterized in that: The valve body (1) and the ball (2) are provided with a transmission unit (3), the transmission unit (3) comprises: A main rotating rod (31) is fixedly connected to the top end face of the ball (2), and the main rotating rod (31) is rotatably connected to the inner wall of the valve body (1); A main gear (32) is sleeved on the outer wall of the main rotating rod (31); A slave gear (33) is engaged with the main gear (32), and the slave gear (33) is used to drive the main gear (32) and the main rotating rod (31) to rotate, so as to adjust the opening and closing of the ball (2); A slave rotating rod (34) is inserted into the inner wall of the slave gear (33), and the slave rotating rod (34) is used to drive the slave gear (33) to rotate.

2. The water hammer arrestor ball valve of claim 1, wherein: The top end face of the valve body (1) is provided with a mounting cover (11), and the main rotating rod (31) and the slave rotating rod (34) are rotatably connected to the inner wall of the mounting cover (11).

3. The water hammer arrestor ball valve of claim 1, wherein: The top end face of the slave rotating rod (34) is fixedly connected with a connecting seat (35).

4. The water hammer arrestor ball valve of claim 2, wherein: The mounting cover (11) is provided with a resistance unit (4), and the resistance unit (4) comprises: A resistance assembly (41) is arranged on the top end face of the main rotating rod (31); A contact seat (42) is fixedly connected to the top end face of the mounting cover (11), and the contact seat (42) is arranged below the resistance assembly (41).

5. The water hammer arrestor ball valve of claim 4, wherein: An arc slope is arranged on the contact seat (42).

6. The water hammer arrestor ball valve of claim 4, wherein: The resistance assembly (41) comprises: A fixed seat (411) is fixedly connected to the top end face of the main rotating rod (31); A sliding rod (412) is slidably connected to the inner wall of the fixed seat (411); An extrusion seat (413) is fixedly connected to the bottom end face of the sliding rod (412), and the bottom end face of the extrusion seat (413) is in close contact with the top of the contact seat (42).

7. The water hammer arrestor ball valve of claim 6, wherein: The top end face of the extrusion seat (413) is fixedly connected with a spring (414), and the other end of the spring (414) is fixedly connected with the fixed seat (411).

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