CN113700880A

CN113700880A - Solid material conveying pipeline and gate valve thereof

Info

Publication number: CN113700880A
Application number: CN202010436710.4A
Authority: CN
Inventors: 李君�; 杜万斗
Original assignee: China Energy Investment Corp Ltd; National Institute of Clean and Low Carbon Energy
Current assignee: China Energy Investment Corp Ltd; National Institute of Clean and Low Carbon Energy
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2021-11-26

Abstract

The invention discloses a solid material conveying pipeline and a gate valve thereof, and relates to the technical field of manufacturing of production tools for conveying solid materials. The gate valve ash removal mechanism comprises an ash removal bin used for collecting solid materials flowing to the second valve cavity end, and the ash removal bin is communicated with the second valve cavity end through an ash removal bin connecting pipe. The ash removal bin is provided with a bottom discharge port and an openable side hand hole. The gate valve deashing mechanism also comprises an airflow purging piece for purging the valve plate cavity. The gate valve and the solid material conveying pipeline can ensure that the gate valve stably operates for a long time, and effectively improve the production efficiency.

Description

Solid material conveying pipeline and gate valve thereof

Technical Field

The invention relates to the technical field of manufacturing of production tools for conveying solid materials, in particular to a solid material conveying pipeline and a gate valve thereof.

Background

The conveying and cutting of solid materials are realized by a common device, namely a gate valve. According to different driving forms, the gate valve is divided into an electric gate valve and a manual gate valve, but the working principle of the valve body part is basically consistent or similar, and the electric gate valve can have partial interlocking and control functions. Since solid materials, especially fragile solid materials or powder materials such as coal dust, ceramic particles, liquefied residues and the like, inevitably have certain or a large amount of dust in the transportation process, and the dust generally has great harm to the equipment, how to reduce or reduce the damage of the dust to the equipment or ensure the normal operation of the equipment in a certain severe dust environment is very important.

Disclosure of Invention

The invention aims to provide a novel solid material conveying pipeline and a gate valve thereof, which can ensure that the gate valve can stably operate for a long time and effectively improve the production efficiency.

In order to achieve the above object, the present invention provides a gate valve for a solid material conveying pipeline, the gate valve comprising:

a valve plate; and

a valve body including a valve plate cavity, the valve plate being disposed at a first valve cavity end of the valve plate cavity and being movable toward a second valve cavity end of the valve plate cavity to intercept the valve plate cavity;

and the second valve cavity end is provided with a gate valve ash removal mechanism communicated with the valve plate cavity.

In some embodiments, the gate valve ash removal mechanism may include an ash removal bin for collecting solid material flowing to the second valve cavity end, the ash removal bin being in communication with the valve cavity through an ash removal bin connection pipe.

In some embodiments, the ash removal bin may be provided with a bottom discharge opening.

In some embodiments, the ash bin may be provided with openable side hand holes.

In some embodiments, the gate valve ash removal mechanism may further comprise a gas flow purging element for purging the valve plate cavity.

In some embodiments, the gas flow purging piece can be a purging pipe penetrating the pipe wall of the ash bin connecting pipe, and the purging pipe extends towards the valve plate cavity.

In some embodiments, the end of the purge tube may be provided with a pivotable movable spray head.

In some embodiments, the purge medium of the gas flow purge may be an inert gas.

In some embodiments, the first valve chamber end may be provided with a valve plate driving mechanism for driving the valve plate to move, the valve plate driving mechanism comprising:

the screw rod nut mechanism is connected with and drives the valve plate to move;

and the hand wheel is used for rotationally driving the screw rod and nut mechanism.

Correspondingly, the invention further provides a solid material conveying pipeline which comprises the gate valve.

The valve plate of the gate valve is arranged at the first valve cavity end of the valve cavity and can move towards the second valve cavity end of the valve cavity to cut off the valve cavity, so that solid materials are cut off, wherein the second valve cavity end is provided with the gate valve ash removal mechanism communicated with the valve cavity, so that when the valve plate moves towards the second valve cavity end to cut off the valve cavity, the valve plate can move to cut the materials and forcibly push solid powder accumulated in the front end of the valve plate and the valve cavity between the valve plate and the valve body to the gate valve ash removal mechanism to be removed, the problem that the gate valve is frequently used and fails due to solid powder is effectively solved, the gate valve can be ensured to stably operate for a long time, and the production efficiency is greatly improved; in addition, the valve plate can remove solid powder in time in each self movement and cutting action, and the cleaning effect is good.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 illustrates a schematic structural view of a gate valve according to an embodiment of the present invention;

fig. 2 is a top view of fig. 1.

Description of the reference numerals

1 valve plate 2 valve body

21 valve plate cavity 211 first valve cavity end

212 second valve chamber end 3 ash cleaning bin

31 bottom discharge opening 32 side hand hole

4 deashing storehouse connecting pipe 5 sweeps pipe

6 handwheel 7 lead screw

8 nut 9 conveying pipe

91 conveying pipe inlet and 92 conveying pipe outlet

Detailed Description

The following detailed description of specific embodiments of the invention refers to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.

The gate valve and the solid material conveying pipeline according to the invention are described below with reference to the accompanying drawings, and the gate valve has a good cleaning effect, can ensure long-term stable operation of the gate valve, and effectively improves the production efficiency.

Referring to fig. 1 and 2, a gate valve for a solid material conveying pipeline, the gate valve comprising a valve plate 1 and a valve body 2, the valve body 2 comprising a valve plate cavity 21, the valve plate 1 being arranged at a first valve cavity end 211 of the valve plate cavity 21 and being movable towards a second valve cavity end 212 of the valve plate cavity 21 to block the valve plate cavity 21. When the valve plate 1 moves from the first valve chamber end 211 towards the second valve chamber end 212 to block the valve plate chamber 21, the valve plate 1 blocks the solid material in the solid material conveying pipeline; the valve plate 1 may restore the delivery of solid material in the solid material delivery conduit as the valve plate 1 moves from the second valve chamber end 212 towards the first valve chamber end 211. Wherein, the second valve cavity end 212 is provided with a gate valve ash removal mechanism communicated with the valve plate cavity 21.

In the cutting-off process of solid materials, particularly pulverized coal, due to the existence of a large amount of pulverized coal, the pulverized coal dust can be stuck on a valve plate of a gate valve or filled in a gap between the valve plate of the gate valve and a valve body, so that the valve plate of the gate valve cannot be normally inserted into the gate valve, the gate valve cannot normally work due to poor closing, or the whole device cannot be stopped, and continuous production cannot be realized. At present can come the dust of gathering in the clearance push-pull valve when stopping usually in order to solve the dust and disturb the problem, this brings great influence to the operation of device undoubtedly, seriously influences production efficiency. In order to solve the pain point and realize the continuous production of the production line, the inventor finds out through continuous thinking and innovation that timely and effectively removing the dust generated in the cutting process is an effective means for ensuring the long-term stable operation of the gate valve. Therefore, the gate valve needs to be improved to increase the online cleaning function of the gate valve, and the online cleaning function needs to meet the cleaning requirement of timely cleaning and effective cleaning.

According to the invention, the second valve cavity end 212 of the gate valve is provided with the gate valve ash removal mechanism which is communicated with the valve plate cavity 21, so that when the valve plate 1 moves towards the second valve cavity end 212 to cut off the valve plate cavity 21, the valve plate 1 can forcibly push solid powder accumulated in the front end of the valve plate 1 and the valve plate cavity 21 between the valve plate 1 and the valve body 2 to the gate valve ash removal mechanism to remove while moving and cutting the material, and the problem of frequent use failure of the gate valve caused by the solid powder is effectively solved, so that the gate valve can be ensured to operate stably for a long time, and the production efficiency is greatly improved. In addition, the valve plate 1 can remove solid powder in time in each self movement and cutting-off action, and the cleaning effect is good. Wherein, the front end of the valve plate 1 is the end of the valve plate 1 close to the second valve cavity end 212. The shape and the installation structure of the gate valve ash removal mechanism can be various, for example, the gate valve ash removal mechanism can be directly installed on the second valve cavity end 212, or can be installed on the second valve cavity end 212 through an intermediate component such as an intermediate connecting pipe, and the shape of the gate valve ash removal mechanism can be square, circular, irregular, and the like, and the invention is not limited thereto.

Alternatively, referring to fig. 1 and 2, the gate valve ash removal mechanism may comprise an ash removal bin 3 for collecting solid material flowing to the second valve chamber end 212, and the ash removal bin 3 is communicated with the valve plate chamber 21 through an ash removal bin connecting pipe 4. The conveying pipe 9 for conveying solid materials is respectively communicated with the valve plate cavity 21 and comprises a conveying pipe feeding hole 91 and a conveying pipe discharging hole 92, and in the conveying process of the materials, the solid materials sequentially pass through the conveying pipe feeding hole 91 and the valve plate cavity 21 and then are discharged through the conveying pipe discharging hole 92 to enter downstream equipment; during the cutting of the solid material, the valve plate 1 moves from the first valve chamber end 211 toward the second valve chamber end 212 to block the valve plate chamber 21 and cut off the solid material between the conveying pipe feed opening 91 and the conveying pipe discharge opening 92.

Because the powder has certain electrostatic effect, certain solid powder must be gathered at the valve plate 1 front end and the valve plate cavity 21 between the valve plate 1 and the valve body 2 in long-time operation process, if the powder can not be removed effectively in time, the valve plate cavity 21 between the valve plate 1 and the valve body 2 can be finally caused to be slowly fully accumulated by the powder along with the extension of the operation time and the action of closing the multiple switches of the gate valve, and the valve plate 1 of the gate valve can not be normally closed to lose the function of the gate valve. Therefore, the ash removing bin 3 is arranged at the second valve cavity end 212, the valve plate 1 forcibly pushes solid powder accumulated in the front end of the valve plate 1 and the valve plate cavity 21 between the valve plate 1 and the valve body 2 to the ash removing bin 3 through the ash removing bin connecting pipe 4 while moving and cutting towards the second valve cavity end 212, so that the solid powder can be effectively removed in time, the long-term stable operation of the gate valve is ensured, the service life of the gate valve is remarkably prolonged, and the operation reliability of the device is improved. Wherein "solid material flowing to second valve chamber end 212" refers to solid material flowing or circulating to second valve chamber end 212, i.e., solid powder material being pushed toward second valve chamber end 212.

In some embodiments, referring to fig. 1 and 2, the ash removal bin 3 can be provided with a bottom discharge opening 31 such that solid material pushed into the ash removal bin 3 can drain by gravity toward the bottom discharge opening 31. Wherein, the bottom bin outlet 31 can set up to the enclosed condition and regularly open and clear up, and perhaps, the bottom bin outlet 31 can communicate with the solid material conveying pipeline in push-pull valve low reaches, then the solid material that is pushed into in the deashing storehouse 3 can directly be arranged to the solid material conveying pipeline in push-pull valve low reaches in, need not regularly to clear up.

In some embodiments, referring to fig. 1 and 2, the ash removal bin 3 can be provided with openable side hand holes 32, so that the ash removal bin 3 can be cleaned and maintained by opening the side hand holes 32 or conveniently maintained without disassembly through a gate valve.

In some embodiments, the gate valve ash removal mechanism further comprises a gas flow purge for purging the valve plate cavity 21. So, the air current sweeps the piece and can blow the powder reversal of the valve plate chamber 21 between valve plate 1 and the valve body 2 of push-pull valve to conveyer pipe 9 between conveyer pipe feed inlet 91 and the conveyer pipe discharge gate 92 for the powder can be discharged along with solid material, can effectively reduce the row's of deashing storehouse 3 and arrange the material clearance number of times. In addition, the airflow purging piece can reversely purge the valve plate running track in the valve plate 1 and the valve body 2, so that the smoothness of the contact surface of the valve plate 1 and the valve body is increased, and the service life of the gate valve is prolonged. Based on the property of the powder, the powder is easy to accumulate into blocks, and if the powder is swept by the airflow sweeping part, the powder is difficult to be effectively and thoroughly cleared.

Further, as shown in fig. 1 and 2, the air flow purging piece can be a purging pipe 5 connected to the pipe wall of the ash cleaning bin connecting pipe 4 in a penetrating mode, the purging pipe 5 extends into the valve plate cavity 21, and a purging pipeline of the purging pipe 5 is simple in arrangement, low in installation cost and convenient to maintain. To save air supply, the purge tube 5 may purge only when the valve plate 1 moves from the second valve chamber end 212 towards the first valve chamber end 211. The gas flow purging unit may be a single purging pipe 5, or may be other purging structures, such as a multi-pipe purging unit with multiple nozzles, for example, and the present invention is not limited thereto.

Furthermore, the tail end of the purging pipe 5 is provided with a movable nozzle (not shown in the figure) capable of pivoting, so that the purging pipe 5 drives the movable nozzle to rotate through pivoting movement, multi-angle purging is performed, and the cleaning effect is better. The movable nozzle may be a nozzle mechanism known to those skilled in the art, and the detailed structure and operation principle of the movable nozzle are not described herein. Furthermore, the purging medium of the gas flow purge may be an inert gas, for example nitrogen or the like, for safety and production requirements.

In some embodiments, the first valve chamber end 211 is provided with a valve plate driving mechanism for driving the valve plate 1 to move, as shown in fig. 1 and 2, the valve plate driving mechanism comprises a lead screw and nut mechanism and a hand wheel 6, the lead screw and nut mechanism is connected with and drives the valve plate 1 to move, and the hand wheel 6 is used for driving the lead screw and nut mechanism to rotate. The feed screw nut mechanism comprises a feed screw 7 and a nut 8, the nut 8 is fixedly installed on the first valve cavity end 211, the feed screw 7 is in threaded connection with the nut 8, and two ends of the feed screw 7 are respectively connected with the valve plate 1 and the hand wheel 6. The screw rod 7 can be driven to spirally advance or spirally retreat relative to the nut 8 by rotating the hand wheel 6 so as to drive the valve plate 1 to move. Of course, the gate valve of the present invention may be driven manually, pneumatically or electrically, and the present invention is not limited thereto.

Correspondingly, the invention further provides a solid material conveying pipeline which comprises the gate valve. The gate valve and the solid material conveying pipeline provided by the invention have good cleaning effect, can ensure long-term stable operation of the gate valve, and effectively improves the production efficiency.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A gate valve for a solid material conveying pipeline, characterized in that the gate valve comprises:

a valve plate (1); and

a valve body (2) comprising a valve plate cavity (21), the valve plate (1) being arranged at a first valve cavity end (211) of the valve plate cavity (21) and being movable towards a second valve cavity end (212) of the valve plate cavity (21) to shut off the valve plate cavity (21);

the second valve cavity end (212) is provided with a gate valve ash removal mechanism communicated with the valve plate cavity (21).

2. The gate valve according to claim 1, wherein the gate valve ash removal mechanism comprises an ash removal bin (3) for collecting solid material flowing to the second cavity end (212), the ash removal bin (3) being in communication with the gate cavity (21) through an ash removal bin connection pipe (4).

3. A gate valve according to claim 2, characterised in that the ash removal bin (3) is provided with a bottom discharge opening (31).

4. A gate valve according to claim 2, characterised in that the ash bin (3) is provided with openable side hand holes (32).

5. The gate valve according to any one of claims 2-4, wherein the gate valve ash removal mechanism further comprises an air flow purging member for purging the valve plate cavity (21).

6. The gate valve according to claim 5, characterized in that the gas flow purge is a purge tube (5) passing through the wall of the connection pipe (4) of the ash bin, the purge tube (5) projecting towards the valve plate cavity (21).

7. A gate valve according to claim 6, characterised in that the end of the purge pipe (5) is provided with a pivotable movable spray head.

8. A gate valve according to claim 5, characterised in that the purging medium of the gas flow purge is an inert gas.

9. A gate valve according to claim 1, wherein the first valve chamber end (211) is provided with a valve plate drive mechanism for driving movement of the valve plate (1), the valve plate drive mechanism comprising:

the screw rod and nut mechanism is connected with and drives the valve plate (1) to move;

and the hand wheel (6) is used for rotationally driving the screw rod and nut mechanism.

10. A solid material conveying pipeline, characterized in that the solid material conveying pipeline comprises a gate valve according to any one of claims 1-9.