CN108253146B - Gate-butterfly type composite valve - Google Patents

Abstract

The invention discloses a gate-butterfly type composite valve. The valve comprises a lower valve body, an upper valve body, a valve rod, a driving box, a valve rod and a composite gate plate, wherein the composite gate plate mainly comprises a gate plate sleeve and a butterfly plate, the gate plate sleeve is arranged in a flow channel as a gate valve core, the butterfly plate is arranged in the gate plate sleeve as a butterfly valve core, rotating shafts at the upper end and the lower end of the butterfly plate are respectively and movably sleeved in through holes formed in the upper side wall and the lower side wall of the gate plate sleeve, and the lower end of the valve rod extends into the lower valve body and is fixedly connected with the top end of the butterfly plate in the gate plate sleeve; the lower valve body is provided with a movable cavity for the up-and-down movement of the composite flashboard, and the movable cavity is positioned above the runner and communicated with the runner. The valve of the invention is characterized in that the rotation and opening of the butterfly plate are controlled by the steering sleeve through the composite flashboard formed by the flashboard sleeve and the butterfly plate, and the valve integrates the gate valve and the butterfly valve, has the advantages of the two valves, and has the functions of stopping and throttling.

Description

Gate-butterfly composite valve

Technical field

The present invention relates to a valve, in particular to a gate-butterfly composite valve.

Background technique

The gate valve is a valve that uses the gate plate as the opening and closing element and moves in the vertical direction along the center line of the internal flow channel of the valve to connect and cut off the flow of the medium. The gate valve is used for fully opening or fully closing the pipeline, and is generally not used to regulate flow. Butterfly valve, also called flip valve, is a regulating valve with a simple structure. Its closing part (valve disc or butterfly plate) is a disc, which rotates around the valve axis to open and close. It can be used for switching control of low-pressure pipeline media. As a regulating valve, the butterfly plate is always located in the flow channel, which will cause resistance to the fluid medium. There are more and more engineering application scenarios for valves, and the functional requirements for valves are getting higher and higher. Composite valves that combine the functional advantages of butterfly valves and gate valves will adapt to and satisfy more application places. The butterfly-gate throttle valve with patent number CN201410216273. A butterfly gate combination valve of CN200420117252.4 is composed of a butterfly valve installed at the front of the gate valve pipeline to form a combination valve.

Most of the valves currently in use are single-function valves with limited application scenarios, and complex working conditions can easily cause them to fail. The above-mentioned butterfly-gate throttle valve of CN201410216273.X has a throttle plate in the flow channel, which will cause excessive resistance of the valve. The butterfly gate combination valve of CN200420117252.4 simply adds a butterfly valve to the front of the gate valve pipeline. Both are just simple combinations of valves, and the advantages of the two valves are not well combined.

Contents of the invention

In order to overcome the shortcomings of the existing single valve function, expand the working conditions of the valve application and extend the service life of the valve, the purpose of the present invention is to provide a gate-butterfly composite gate that realizes the combined functions of butterfly valve and gate valve through a butterfly-gate composite gate plate. valve.

The technical solution adopted by the present invention is:

The invention includes a lower valve body, an upper valve body, a valve stem and a drive box. The lower valve body is provided with a flow channel, the upper valve body is connected to the upper end of the lower valve body, and the lower end of the valve stem extends through the upper valve body into the inside of the lower valve body. The upper end of the valve stem passes through the upper valve body and is connected to the drive box. It also includes the valve stem and the composite gate. The composite gate is mainly composed of a gate sleeve and a butterfly plate. The gate sleeve serves as the gate valve core and is installed in the flow channel. The butterfly plate is installed in the gate sleeve as the butterfly valve core. The rotating shafts at the upper and lower ends of the butterfly plate are respectively movable and set in the through holes opened in the upper and lower side walls of the gate sleeve. The lower end of the valve stem extends into the back of the lower valve body. It is fixedly connected to the top of the butterfly plate in the gate sleeve; the lower valve body is provided with an movable cavity for the composite gate plate to move up and down. The movable cavity is located above the flow channel and communicates with the flow channel.

There is a steering sleeve between the valve stem and the upper valve body. The steering sleeve is set in the through hole of the upper valve body. The valve stem is set in the steering sleeve. One side of the outer wall of the valve stem is provided with a steering sleeve parallel to the valve stem. The convex strip itself has a strip groove parallel to the valve stem on one side of the inner wall of the steering sleeve, and the convex strip is embedded into the strip groove to form a sliding pair.

Limiting blocks are provided on both sides of the inner wall of the gate sleeve, and two limiting blocks are arranged on both sides of the symmetrical closing position of the butterfly plate, so that the butterfly plate can only rotate within a 180-degree range.

The upper valve body and the lower valve body are fixedly connected with fastening bolts and fastening nuts through the flange structure to form a complete valve body.

The upper valve body is installed on the upper part of the movable cavity of the lower valve body.

When the gate is closed, the outer wall of the gate sleeve and the inner wall of the flow channel of the lower valve body are sealingly connected.

When the butterfly plate is closed, there is a sealing connection between the butterfly plate and the inner wall of the gate sleeve, and there is a sealing connection between the rotating shafts at the upper and lower ends of the butterfly plate and the through holes in the upper and lower side walls of the gate sleeve.

The valve of the present invention has a gate-butterfly composite gate composed of a gate sleeve and a butterfly plate, integrates a gate valve and a butterfly valve into one body, has the dual functions of cut-off and throttling, and has the advantages of both valves.

The composite gate of the present invention is composed of a gate sleeve and a butterfly plate. The butterfly plate is located in the gate sleeve and positioned by the gate sleeve.

The steering sleeve of the invention controls the rotation and opening of the butterfly plate, and the steering sleeve drives the valve stem to rotate, open and close the butterfly plate in the gate sleeve, thereby realizing the function of the butterfly valve. Turning the steering sleeve can close the butterfly valve and raise the gate plate at the same time. There is no structure in the valve flow channel to increase the valve resistance.

The valve stem of the present invention is divided into two parts. The upper part is driven by a drive box to move up and down. It can be driven by a rack and pinion. The lower part of the valve stem has convex strips that can cooperate with the strip groove of the steering sleeve and is driven by the steering sleeve. Steering makes the butterfly plate rotate to realize the function of butterfly valve.

The beneficial effects of the present invention are:

When the valve is opened, there is no butterfly plate or fixed structure blocking the flow in the valve flow channel, and the flow effect is better.

When the valve is closed, the rotation and opening of the butterfly plate can be controlled by the steering sleeve to achieve throttling and rapid opening functions, which makes up for the gate valve's shortcoming of being unable to adjust flow.

The present invention combines the functional advantages of butterfly valves and gate valves through a composite butterfly-gate composite gate. The valve structure is simple, which increases the application scenarios of the valve. When one valve cannot be opened and fails, it does not affect the use of the other function, extending the service life of the valve. service life.

The valve of the present invention uses a composite gate composed of a gate sleeve and a butterfly plate, and uses a steering sleeve to control the rotation and opening of the butterfly plate. It integrates a gate valve and a butterfly valve into one body, and has the advantages of both valves, including cut-off and throttling. dual function.

Description of drawings

Figure 1 is a cross-sectional view of the gate-butterfly composite valve of the present invention when it is closed.

Figure 2 is an assembly diagram of the steering sleeve and valve stem of the gate-butterfly composite valve of the present invention.

Figure 3 is a structural diagram of the gate plate sleeve of the gate-butterfly composite valve of the present invention.

Figure 4 is a structural diagram of the butterfly plate of the gate-butterfly composite valve of the present invention.

Figure 5 is a schematic diagram of the position of the gate structure when the butterfly valve of the present invention is opened.

In Figure 1: 1. Lower valve body, 2. Upper valve body, 3. Drive box, 4. Steering sleeve, 5. Fastening bolt, 6. Fastening nut, 7. Valve stem, 8. Gate sleeve , 9. Butterfly plate, 10. Limiting block.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and examples.

As shown in Figure 1, the present invention includes a lower valve body 1, an upper valve body 2, a valve stem 7, a drive box 3, a valve stem 7 and a composite gate. The lower valve body 1 and the upper valve body 2 are installed up and down to form a complete valve body. , there is a horizontal flow channel in the lower valve body 1, the upper valve body 2 is connected to the upper end of the lower valve body 1, the upper valve body 2 and the lower valve body 1 are fixedly connected through the flange structure with fastening bolts 5 and fastening nuts 6 into a complete valve body. The lower end of the valve stem 7 passes through the upper valve body 2 and extends into the interior of the lower valve body 1 . The upper end of the valve stem 7 passes through the upper valve body 2 and is connected to the drive box 3 . The composite gate is mainly composed of a gate sleeve 8 and a butterfly plate 9. The gate sleeve 8 serves as a gate valve core and is installed in the flow channel. The butterfly plate 9 serves as a butterfly valve core and is installed in the gate sleeve 8. The gate sleeve 8 8. A rotatable butterfly plate 9 is installed in the middle.

As shown in Figure 4, the butterfly plate 9 is mainly composed of a circular plate and a rotating shaft 9A arranged in the middle of the circular plate. As shown in Figure 3, the rotating shafts 9A at the upper and lower ends of the butterfly plate 9 are respectively movable and sleeved on the gate. In the through hole 8A opened on the upper and lower side walls of the sleeve 8, as shown in Figure 5, the lower end of the valve stem 7 extends into the lower valve body 1 and is fixedly connected to the top of the butterfly plate 9 in the gate sleeve 8, that is, the butterfly plate 9 The rotating shaft at the upper end passes through the through hole on the upper side wall of the gate sleeve 8 and is fixedly connected to the lower end of the valve stem 7 . The lower valve body 1 is provided with an movable cavity for the composite gate plate to move up and down. The upper valve body 2 is installed on the upper part of the movable cavity of the lower valve body 1. The movable cavity is located above the flow channel and communicates with the flow channel. The valve stem is driven by the drive box 3 7 moves up and down, which in turn drives the composite gate composed of the butterfly plate 9 and the gate sleeve 8 to move up and down in the movable chamber and flow channel to control the closing and opening of the gate valve.

As shown in Figure 2, a steering sleeve 4 is provided between the valve stem 7 and the upper valve body 2. The steering sleeve 4 is sleeved in the through hole of the upper valve body 2. The valve stem 7 is sleeved in the steering sleeve 4. The valve The outer wall of the rod 7 is provided with a protrusion 7A parallel to the valve stem 7 itself, and the inner wall of the steering sleeve 4 is provided with a strip groove 4A parallel to the valve stem 7. The protrusion 7A is embedded into the strip groove 4A to form a Sliding pair; the rotating steering sleeve 4 drives the valve stem 7 to rotate through the embedded positioning between the convex strip 7A and the strip groove 4A, thereby realizing the opening and closing of the butterfly plate 9.

As shown in Figure 3, limit blocks 10 are provided on both sides of the inner wall of the gate sleeve 8. Two limit blocks 10 are provided on both sides of the symmetrical closing position of the butterfly plate 9, so that the butterfly plate 9 can only rotate within a 180-degree range. , locate and limit the accurate position of the butterfly plate 9 when it is closed and the limit position of the opening of the butterfly plate 9 in the gate sleeve 8.

The open position of the butterfly plate 9 is closed and is located at a position perpendicular to the position shown in Figure 5.

When the butterfly plate 9 is opened, as shown in Figure 5, it is the structural diagram of the composite butterfly plate when the butterfly plate is opened to the maximum opening. At this time, the limit block 10 limits the extreme position of the butterfly plate opening. The butterfly plate is located at the center of the flow channel. Adjust Valve flow, realizing butterfly valve function.

When the gate is closed, the outer wall of the gate sleeve 8 and the inner wall of the flow channel of the lower valve body 1 are sealingly connected. When the butterfly plate is closed, there is a sealing connection between the butterfly plate 9 and the inner wall of the gate sleeve 8, and there is a sealing connection between the rotating shafts at the upper and lower ends of the butterfly plate 9 and the through holes in the upper and lower side walls of the gate sleeve 8.

The working principle and working process of the present invention are as follows:

When the valve is closed, the drive box 3 controls the composite gate plate to move up and down through the valve stem 7 to control the closing and opening of the valve. The open position of the butterfly plate 9 is the closed position, and the closed position is a circular plate arranged perpendicular to the direction of the flow channel. The handwheel connected to one end of the drive box 3 drives the composite gate plate to move up and down to realize the opening and closing of the gate valve and the opening of the gate valve. and truncation function.

When the valve needs to be opened quickly, the steering sleeve 4 is turned, and the steering sleeve 4 drives the valve stem 7 to rotate the butterfly plate 9, adjust the flow, and realize the throttling adjustment function. The opening of the butterfly plate is determined by the rotation of the steering sleeve 4. The angle is determined, and the limit position of the butterfly plate 9 is limited by the limiting block 10 on the steering sleeve 4. After turning the steering sleeve 4 to close the butterfly valve 9, and then raising the gate plate, there is no structure in the valve flow channel to increase the valve resistance.

When the gate sleeve 8 rusts and fails after long-term use under the up and down movement in the lower valve body flow channel and the movable cavity, the gate sleeve 8 cannot be raised. In this case, the butterfly valve function can also be performed by rotating the butterfly plate 9 use.

When the butterfly plate 9 rusts and fails after long-term use under rotation in the lower valve body flow channel, the butterfly plate 9 cannot be opened. In this case, the gate valve function can also be used by the up and down movement of the gate sleeve 8.

This gate-butterfly composite valve integrates gate valves and butterfly valves into one, integrating the advantages of the two valves. It has the functions of cut-off and throttling, increases the application places of the valve, shares the pressure of opening and closing adjustment, and extends the service life of the valve.

Claims (5)

1. A gate-butterfly composite valve, including a lower valve body (1), an upper valve body (2), a valve stem (7) and a drive box (3). The lower valve body (1) is provided with a flow channel, The upper valve body (2) is connected to the upper end of the lower valve body (1), the lower end of the valve stem (7) passes through the upper valve body (2) and extends into the lower valve body (1), and the upper end of the valve stem (7) passes through the upper valve The body (2) is connected to the drive box (3) at the back, and is characterized by: it also includes a valve stem (7) and a composite gate. The composite gate is mainly composed of a gate sleeve (8) and a butterfly plate (9). The plate sleeve (8) is installed in the flow channel as a gate valve core, and the butterfly plate (9) is installed in the gate sleeve (8) as a butterfly valve core. The rotating shafts (9A) at the upper and lower ends of the butterfly plate (9) are equipped with They are respectively movably installed in the through holes (8A) opened in the upper and lower side walls of the gate sleeve (8). The lower end of the valve stem (7) extends into the lower valve body (1) and connects with the butterfly in the gate sleeve (8). The top of the plate (9) is fixedly connected; the lower valve body (1) is provided with an movable cavity for the composite gate plate to move up and down. The movable cavity is located above the flow channel and communicates with the flow channel. The valve stem (7) is driven by the drive box (3) It moves up and down, thereby driving the composite gate composed of the butterfly plate (9) and the gate sleeve (8) to move up and down in the movable chamber and flow channel, controlling the cut-off and opening of the gate valve; A steering sleeve (4) is provided between the valve stem (7) and the upper valve body (2). The steering sleeve (4) is set in the through hole of the upper valve body (2). The valve stem (7) Set in the steering sleeve (4), one side of the outer wall of the valve stem (7) is provided with a convex strip (7A) parallel to the valve stem (7) itself, and one side of the inner wall of the steering sleeve (4) is provided with a convex strip (7A) parallel to the valve stem (7). The strip groove (4A) of (7), the protruding strip (7A) is embedded in the strip groove (4A) to form a sliding pair; Limit blocks (10) are provided on both sides of the inner wall of the gate sleeve (8), and two limit blocks (10) are provided on both sides of the symmetrical closing position of the butterfly plate (9), so that the butterfly plate (9) Can only rotate within 180 degrees. 2. A gate-butterfly composite valve according to claim 1, characterized in that: a flange structure fastening bolt (5) is used between the upper valve body (2) and the lower valve body (1). ) and the fastening nut (6) are fixedly connected to form a complete valve body. 3. A gate-butterfly composite valve according to claim 1, characterized in that the upper valve body (2) is installed on the upper part of the movable cavity of the lower valve body (1). 4. A gate-butterfly composite valve according to claim 1, characterized in that: when the gate is closed, the outer wall of the gate sleeve (8) and the inner wall of the flow channel of the lower valve body (1) are sealingly connected. 5. A gate-butterfly composite valve according to claim 1, characterized in that: when the butterfly plate is closed, the butterfly plate (9) and the inner wall of the gate sleeve (8) are sealedly connected, and the The rotating shafts at the upper and lower ends of the butterfly plate (9) are sealedly connected to the through holes in the upper and lower side walls of the gate sleeve (8).