CN105485365B - A kind of ball valve for water-coal-slurry conveying - Google Patents

Abstract

The invention discloses a ball valve used for conveying coal-water slurry. There is a through hole on the upper part of the sphere, and an inner valve core body for forming the inner valve of the ball valve is also arranged between the right valve body and the left valve body. Fixed connection. The upper part of the inner spool body is a threaded valve stem, the middle and lower parts of the inner spool body are respectively a stopper and a disc-shaped second spool, and the valve stem is connected to the second spool through the stopper. upper side. The present invention makes full use of the second valve core on the valve stem of the ball valve, so that the valve core of the ball valve has the function of a gate plate, realizes the quick opening and closing of the ball valve; reduces the wear of the valve body of the ball valve, and makes the ball valve used for coal-water slurry transportation have double The opening and closing function reduces the harm caused by leakage to the environment and prolongs the service life of the ball valve.

Description

A ball valve for coal-water slurry delivery

technical field

The invention relates to a ball valve, in particular to a ball valve used for conveying coal-water slurry.

Background technique

Coal water slurry is a new, efficient and clean coal-based fuel, and it is a new member of the fuel family. It is composed of 65%-70% coal with different particle size distribution, about 29-34% water and about 1% chemical additives made mixture. After many rigorous processes, impurities such as incombustible components in coal are screened out, and only the essence of carbon is retained, becoming the essence of coal water slurry. It has the same fluidity as oil, and its calorific value is half that of oil, so it is called a liquid coal product. Coal water slurry technology includes key technologies such as coal water slurry preparation, storage and transportation, combustion, and additives. It is a system technology involving multiple disciplines. Coal water slurry has the characteristics of high combustion efficiency and low pollutant emissions, and can be used in power plant boilers , Industrial boilers and industrial kilns replace oil, gas, and coal combustion, which is an important part of today's clean coal technology. However, due to the difference in coal particle size, it will cause serious impact and wear to the ball valve during pipeline transportation, resulting in failure and leakage of the ball valve. It is easy to cause the ball valve body to be severely worn or blocked, resulting in the inability of the ball valve to complete the adjustment function and normal opening and closing, resulting in the leakage of the coal-water slurry and increasing the transportation cost.

Contents of the invention

In order to overcome the deficiencies of the existing ball valves in the background technology, the object of the present invention is to provide a ball valve for coal-water slurry transportation, which has a double-close function, so that the valve core of the ball valve has the function of a gate plate, and realizes the quick opening and closing of the ball valve ;Reduce the wear of the ball valve body, make the ball valve have double-boot closing function, reduce the harm caused by the leakage of the ball valve to the environment, and prolong the service life of the ball valve used for coal-water slurry transportation.

The technical scheme adopted in the present invention is:

The invention includes a right valve body, a ball, a handle and a left valve body. Balls are installed in the right valve body and the left valve body. Sealing rings are arranged between the ball and the right valve body and the left valve body respectively. hole, between the right valve body and the left valve body is also provided with an inner valve core body for forming the inner valve of the ball valve, the lower end of the inner valve core body is inserted into the through hole, and the upper end of the inner valve core body is fixedly connected with the handle.

The upper part of the inner valve core body is a threaded valve stem, and the lower part of the inner valve core body is respectively a disc-shaped second valve core, the stopper is movably sleeved in the valve stem, and the valve stem is connected to the second valve the upper side of the core.

The second valve core is inserted into the ball through the through hole on the ball, and the stopper is located in the gap groove between the right valve body and the left valve body outside the ball.

The stopper has a trapezoidal cross-section, the width of the stopper is the same as the diameter d2 of the valve stem, and the length direction of the trapezoid is the length direction of the stopper and is perpendicular to the disk surface of the second valve core.

The valve stem is installed in the hole formed between the right valve body and the left valve body, the hole is provided with packing and is compressed and sealed by the packing gland nut, and the thread of the valve stem is sleeved on the valve stem outside the packing gland nut. In the nut, the threads cooperate with the valve stem nut, and the top end of the valve stem is fixedly connected with the handle.

The valve stem, the stopper and the second valve core are integrally formed.

The diameter of the second spool disk is the same as the diameter d of the inner cavity of the ball.

The beneficial effects that the present invention has are:

Through the understanding of the advantages, application range, development history, production technology, transportation route, and ball valve application range of coal water slurry, considering the adjustment failure of the ball valve when used in the coal water slurry pipeline, it cannot be opened and closed normally , resulting in fluid leakage; and the impact of the solids contained in the coal-water slurry on the ball valve body, causing wear and tear, resulting in the failure of the ball valve.

The present invention makes full use of the second spool on the ball valve stem to make the ball valve spool have the function of a gate plate, so as to realize the quick opening and closing of the ball valve;

Reduce the wear of the ball valve body, make the ball valve have a double-close function, reduce the harm caused by leakage to the environment, and prolong the service life of the ball valve.

The invention is mainly used to reduce the solids contained in the fluid in the coal-water slurry pipeline transportation, which will cause wear to the ball of the ball valve and cause the ball valve to lose its original adjustment function.

Description of drawings

Fig. 1 is the front view of the ball valve of the present invention.

Fig. 2 is a three-dimensional view of the valve stem of the present invention.

Fig. 3 is the sphere of the ball valve of the present invention.

In the figure: 1. Right valve body, 2. Ball, 3. Seal ring, 4. Valve stem, 5. Stopper, 6. Packing, 7. Packing gland nut, 8. Screw, 9. Handle, 10. Valve Rod nut, 11, thread, 12, left valve body, 13, second spool.

detailed description

The present invention will be further described below in conjunction with drawings and embodiments.

As shown in Figure 1, the present invention comprises right valve body 1, spheroid 2, handle 9 and left valve body 12, and spheroid 2 is housed in right valve body 1 and left valve body 12, and spheroid 2 is connected with right valve body 1 and left valve body respectively. A sealing ring 3 is provided between the body 12, as shown in Figure 3, a through groove a is opened on the upper part of the ball 2, and an inner valve core for forming the inner valve of the ball valve is also arranged between the right valve body 1 and the left valve body 12 body, the lower end of the inner valve core body is inserted into the through groove a, and the upper end of the inner valve core body is fixedly connected with the handle 9.

As shown in Figure 2, the upper part of the inner valve core body is a valve stem 4 with threads 11, the lower part of the inner valve core body is a disc-shaped second valve core 13, and the stopper 5 is movably sleeved in the valve stem 4 , the valve stem 4 is connected to the upper side of the second valve core 13 .

As shown in FIG. 1 , the second valve core 13 is inserted into the ball 2 through the slot a on the ball 2 , and the stopper 5 is located in the gap between the right valve body 1 and the left valve body 12 outside the ball 2 . The channel a is opened and closed by the second valve core 13 driven by the handle 9 and controls the opening and closing of the sphere 2 .

As shown in FIG. 2 , the stopper 5 has a trapezoidal cross-section, the width of the stopper 5 is the same as the valve stem diameter d2, and the length direction of the trapezoid is the length direction of the stopper 5 and is perpendicular to the disk surface of the second valve core 13 . The stopper 5 in the middle of the valve stem 4 is used to determine whether the second valve body 13 is fully opened.

As shown in Figure 1, the valve stem 4 is installed in the hole formed between the right valve body 1 and the left valve body 12, the hole is provided with packing 6 and is compressed and sealed by the packing gland nut 7, the thread 11 of the valve stem 4 Covered in the valve stem nut 10 outside the packing gland nut 7, the thread 11 cooperates with the valve stem nut 10, and the top end of the valve stem 4 is fixedly connected with the handle 9. The valve stem 4 and the valve stem nut 10 realize the rotation opening and closing of the second valve core 13 under the action of the handle 9, and at the same time, the rotation opening and closing of the control ball valve spheroid 6 is completed when the second valve core is opened and closed. When the stopper 5 collides with the filler 6, the hand wheel 9 will not be able to be opened further, and it can be determined that the second spool 13 is fully opened, and the gate function of the second spool 13 can be brought into play.

The valve stem 4, the stopper 5 and the second valve core 13 are integrally formed. The second valve core 13 is directly processed together with the valve stem 4 of the ball valve, and the stopper 5 on the valve stem 4 and the valve stem thread 10 form a whole together.

The disc diameter of the second spool 13 is the same as the diameter d of the inner chamber of the ball 2 .

The upper part of the ball valve increases the space for placing the second valve core 13, and the screw 8 is used to fasten this area to avoid leakage.

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

Considering the adjustment failure of the ball valve during use, resulting in failure to open and close normally, resulting in fluid leakage; and the impact of the solid particles contained in the coal-water slurry on the ball valve body, causing wear and tear, resulting in the failure of the ball valve.

The purpose of the present invention is to combine the characteristics of the coal-water slurry and the characteristics of the fast switching valve, and use the second valve core 13 with the function of the gate to realize the fast opening and closing of the ball valve, reduce the wear of the ball valve body, and the leakage will cause environmental damage. harm, prolong the service life of the ball valve, and ensure the cost of coal-water slurry pipeline transportation.

When the handle 9 is turned, the thread 11 on the valve stem 4 of the ball valve will move together with the stem nut 10, driving the inner valve core body to rotate and move up and down axially through the screw mechanism to realize the second valve core 13 on the ball. 2. Turn on and off inside. Since the second valve core 13 is located in the channel a of the ball 2 , it drives the ball 2 to rotate. When the adjustment of the ball valve is normal, turn the handwheel to let the second valve core 13 rise slowly until the opening and closing of the second valve core 13 is completed, and the flow in the pipeline can be controlled to increase slowly, which can avoid the flow of coal water slurry in the pipeline. It increases instantly and damages the pipeline. After the opening and closing of the second spool 13 is completed, the handwheel continues to be turned, and the valve stem connected to the handwheel drives the opening and closing of the ball valve body 2 to play the regulating role of the ball valve.

Once the ball valve is unable to be closed due to adjustment failure during use, the gate function of the second spool 13 can be rapidly exerted. Turn the handle 9 to lower the second valve core 13 to the bottom, so that the second valve core 13 is not embedded in the channel a of the ball 2, and the second valve core 13 can rotate independently to realize the opening and closing of the valve.

It can be seen that the technical effect of the present invention is remarkable, realizes the quick opening and closing of the ball valve, and the ball valve with double closing function reduces the harm caused by leakage to the environment, prolongs the service life of the ball valve, and will reduce the risk of coal-water slurry pipeline transportation. The solids contained in the fluid cause wear to the ball valve ball.

Claims (4)

1. A ball valve for coal-water slurry delivery, comprising a right valve body (1), a ball (2), a handle (9) and a left valve body (12), a right valve body (1) and a left valve body (12 ) is equipped with a sphere (2), and a sealing ring (3) is provided between the sphere (2) and the right valve body (1) and the left valve body (12) respectively, and it is characterized in that: the upper part of the sphere (2) has a Through groove (a), there is also an inner valve core body used to form the inner valve of the ball valve between the right valve body (1) and the left valve body (12). The lower end of the inner valve core body is inserted into the through groove (a). The upper end of the valve core body is fixedly connected with the handle (9); The upper part of the inner spool body is a valve stem (4) with threads (11), the lower part of the inner spool body is respectively a disc-shaped second spool (13), and the stopper (5) movable sleeve in the stem (4); The second valve core (13) is inserted into the ball (2) through the slot (a) on the ball (2), and the stopper (5) is located outside the ball (2) on the right valve body (1) and the left valve body (12) in the gap groove between; The valve stem (4) is installed in the hole formed between the right valve body (1) and the left valve body (12), and a packing (6) is arranged in the hole and is compressed and sealed by the packing gland nut (7). , the thread (11) of the stem (4) is sleeved in the stem nut (10) outside the packing gland nut (7), the thread (11) cooperates with the stem nut (10), and the top end of the stem (4) is in contact with the stem nut (10). The handle (9) is fixedly connected; When the handle (9) is turned, the thread (11) on the stem (4) of the ball valve will move together with the stem nut (10), driving the inner valve core to rotate and move up and down axially through the screw mechanism. Realize the rotation opening and closing of the second valve core (13) in the ball (2). 2. A ball valve for coal-water slurry transportation according to claim 1, characterized in that: the stopper (5) has a trapezoidal cross-section, and the width of the stopper (5) is equal to the valve stem diameter d2 Similarly, the length direction of the trapezoid is the length direction of the block (5) and is perpendicular to the disk surface of the second valve core (13). 3. A ball valve for coal-water slurry transportation according to claim 1, characterized in that: the valve stem (4) and the second valve core (13) are integrally formed. 4. A ball valve for conveying coal-water slurry according to claim 1, characterized in that: the disc diameter of the second valve core (13) is the same as the diameter d of the inner cavity of the sphere (2).