CN210318750U

CN210318750U - Pneumatic valve for asphalt pressurization system

Info

Publication number: CN210318750U
Application number: CN201921728803.3U
Authority: CN
Inventors: 陈扬; 李志强; 谭炜州; 陈冬
Original assignee: Meishan Shida New Materials Co ltd
Current assignee: Meishan Shida New Materials Co ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-04-14
Anticipated expiration: 2029-10-15

Abstract

The utility model discloses a pneumatic valve for pitch pressurization system, including valve body, valve rod, case, direction lid and execution cylinder, valve body and case sealed department add the valve body spare, the valve body spare is inlayed on the valve body, the sealed face that valve body spare top and case combined together is the circular cone face, the lower part is equipped with circular cone boss in the valve rod, the direction lid inboard is seted up with circular cone boss assorted bell jar; the valve rod is fixedly connected with the execution cylinder, and a plurality of springs are arranged between the top of the pressure plate and the inner top surface of the execution cylinder. Compared with the prior art, the utility model discloses combine the advantage of ball valve and the advantage of ordinary stop valve, solve long-time use pitch and lead to sealed not tight problem at sealed face coking, avoid conventional valve pipeline area when the valve is opened to press the phenomenon of during operation from sealed packing leakage. When power failure or air source faults occur, the valve can be kept in a closed state, and accidents such as leakage and the like cannot be caused.

Description

Pneumatic valve for asphalt pressurization system

Technical Field

The utility model relates to a plain trade flooding field of charcoal especially relates to a pneumatic valve for pitch pressurization system.

Background

The valves on the asphalt pipelines in the electrode impregnation system in the carbon industry in China mostly adopt heat-insulating pneumatic ball valves or ordinary heat-insulating pneumatic stop valve valves, and the phenomena of blocking, sealing damage, leakage and the like of the ball valves often occur in the pneumatic ball valves in the asphalt impregnation system due to the increase of insoluble solid substances in asphalt; when the ordinary stop valve is closed, if the original fault occurs, the valve can be pushed open due to the pressure in the pipeline, and a dangerous leakage accident is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a solve pitch and lead to sealed not tight problem at sealed face coking, from the problem of sealed packing leakage when the valve is opened, when having a power failure or faults such as air supply, the valve can keep the closed state, can not arouse accidents such as leakage for pitch pressurization system's pneumatic valve.

In order to realize the purpose, the utility model discloses a technical scheme is: a pneumatic valve for an asphalt pressurization system comprises a valve body, a valve rod, a valve core, a guide cover and an execution cylinder, wherein a valve body part is additionally arranged at the sealing position of the valve body and the valve core, the valve body part is embedded on the valve body, the sealing surface of the top of the valve body part, which is combined with the valve core, is a conical surface, a conical boss is arranged at the middle lower part of the valve rod, and a conical groove matched with the conical boss is formed in the inner side of the guide cover; the valve rod is fixedly connected with the execution cylinder, and a plurality of springs are arranged between the top of the pressure plate and the inner top surface of the execution cylinder.

Preferably, the valve body member is a circular ring, and the valve body member is a hard alloy material member.

Preferably, a positioning bracket for positioning the spring is arranged between the pressure plate and the execution cylinder,

preferably, the positioning support is composed of an inner pipe body, two end covers and two positioning blocks, the positioning blocks are respectively fixed on the pressure plate and the execution cylinder through fastening screws, the end covers are sleeved at two ends of the inner pipe body and cover the positioning blocks in the end covers, the spring is sleeved on the positioning support and is located between the two end covers, a telescopic structure is adopted between the end covers and the inner pipe body, and the telescopic amount of the telescopic structure is larger than the maximum lifting amount of the valve rod in the opening process.

Preferably, two ends of the inner tube are widened to form expansion openings, the end cover is provided with a through hole sleeved with the inner tube body, and the diameter of the through hole is smaller than that of the expansion openings and larger than that of the inner tube body.

Preferably, a guide mechanism is arranged between the pressure plate and the execution cylinder.

Preferably, the wire guiding mechanism consists of a guide rod and a guide sleeve, the guide sleeve is sleeved on the guide rod, the guide sleeve and the guide rod are respectively fixed on the pressure plate and the execution cylinder, a gap is reserved between the head of the wire guiding rod and the root of the guide sleeve, and the height of the gap is greater than the maximum lifting amount of the valve rod in the opening process.

Compared with the prior art, the utility model has the advantages of: the utility model discloses combine the advantage of ball valve and the advantage of ordinary stop valve, carry out the optimal design to ordinary pneumatic stop valve case structure, through sealed face design, solve long-time use pitch and lead to sealed not tight problem at sealed face coking, avoid conventional valve pipeline area when the valve is opened to press the phenomenon of during operation from sealed packing leakage. Through carrying out valve pneumatic actuator design transformation, guaranteed valve closed condition pipeline area pressure work, when having a power failure or faults such as air supply, the valve can keep closed condition, can not arouse accidents such as leaking.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural diagram of the actuating cylinder of the present invention.

In the figure: 1. a valve body; 2. a valve core; 3. a valve stem; 4. a guide cover; 5. an actuating cylinder; 6. a valve body member; 7. pressing a plate; 8. a spring; 81. positioning blocks; 82. an end cap; 83. an inner tube body; 9. a guide mechanism; 91. A guide bar; 92. a guide sleeve; 10. a conical boss; 11. and (4) a tapered groove.

Detailed Description

The present invention will be further explained below.

Aiming at the practical situation of the impregnation system in the carbon industry, the valve is required to be flexible in action and free of leakage, and when uncontrollable factors such as power failure and gas source failure happen, the valve is required to be kept in a closed state to avoid safety accidents such as leakage. The valve core of the pneumatic ball valve generally adopts hard sealing or soft sealing, the valve core adopts a hard sealing mode, the valve body needs heat preservation by heat conduction oil at 200 ℃, the thermal expansion amount of the valve core and the valve body is considered, the valve core is high in manufacturing and installation requirements, high in price and high in requirement on the cleanliness of asphalt, otherwise, the valve core is blocked or not tightly sealed, and the like, and when the valve core of the ball valve adopts a soft sealing mode, the valve core is sealed or damaged quickly to cause leakage due to more impurities in the asphalt. The common pneumatic stop valve adopts plane sealing on a sealing surface, so that the long-time use of the common pneumatic stop valve can cause untight sealing due to coking of asphalt on the plane or retention of impurities in the asphalt on the sealing plane, a common actuator does not have mechanical pretightening force, and a valve core is pushed open by the pressure in a pipeline when power failure, air source failure or other faults occur, so that leakage accidents are caused.

Therefore, the valve core structure of the common pneumatic stop valve is optimally designed by combining the advantages of the ball valve and the advantages of the common stop valve, the stop valve actuator is transformed, and safety facilities are additionally arranged.

Example 1: referring to fig. 1 and 2, a pneumatic valve for asphalt pressurization system comprises a valve body 1, a valve rod 3, a valve core 2, a guide cover 4 and an actuating cylinder 5,

designing a sealing surface:

the valve body 6 is additionally arranged at the sealing position of the valve body 1 and the valve core 2, the valve body 6 is annular, the valve body 6 is made of hard alloy materials and has good structural strength, the valve body 6 is embedded on the valve body 1, the sealing surface of the top of the valve body 6, which is combined with the valve core 2, is a conical surface, the conical surface design is adopted, when the valve is closed, the valve body 6 and the valve core 2 are sealed to form linear sealing, asphalt on the sealing surface of the valve core 2 is pushed away by the valve core 2, and the problem that the sealing is not tight due to coking of the asphalt on the sealing surface can be avoided after long.

A conical boss 10 is arranged at the middle lower part of the valve rod 3, and a conical groove 11 matched with the conical boss 10 is formed in the inner side of the guide cover 4; the conical boss 10 is machined on the valve rod 3 to form a conical surface, the corresponding conical groove 11 is also machined on the guide cover 4 to form a conical surface, when the valve is opened, the conical surface on the valve rod 3 and the conical surface on the guide cover 4 form linear sealing, the requirement for working under pressure in the pipeline in the valve opening state is met, and the phenomenon that the conventional valve leaks from a sealing packing when the pipeline works under pressure when the valve is opened is avoided.

Designing a valve pneumatic actuator:

the valve rod is characterized in that a pressing plate 7 is arranged in the execution cylinder 5, the pressing plate 7 is fixedly connected with the valve rod 3, and a plurality of springs 8 are arranged between the top of the pressing plate 7 and the inner top surface of the execution cylinder 5. A spring 8 is additionally arranged in an execution cylinder 5 for opening and closing a valve, the preset elastic force of the spring 8 is determined according to the actual use condition, the pressure applied to the valve core 2 is calculated according to the size of the contact surface of the valve core 2, the total preset elastic force corresponding to the spring 8 is larger than the pressure applied to the valve core 2 during working, the safety coefficient can be 2-3, and the diameter of the cylinder is calculated according to the maximum elastic force generated by compression of the spring 8 and the condition of field compressed air. Therefore, when the pipeline works under pressure in the valve closing state, the valve can keep the closing state due to power failure or air source and other faults, and accidents such as leakage and the like cannot be caused.

The positioning device is characterized in that a positioning support for positioning the spring 8 is arranged between the pressing plate 7 and the execution cylinder 5, the positioning support is composed of an inner pipe body, two end covers 82 and two positioning blocks 81, the positioning blocks 81 are respectively fixed on the pressing plate 7 and the execution cylinder 5 through fastening screws, the end covers 82 are sleeved at two ends of the inner pipe body 83, the positioning blocks 81 are covered in the end covers 82, the spring 8 is sleeved on the positioning support and is positioned between the two end covers 82, the spring 8 is positioned, and the phenomenon that the spring 8 deforms in the compression and extension processes and influences the operation of the execution cylinder 5 is avoided. The end cover 82 and the inner pipe body 83 adopt a telescopic structure, and the telescopic amount of the telescopic structure is larger than the maximum lifting amount of the valve rod 3 in the opening process, so that the normal opening and closing of the valve cannot be influenced by the additionally arranged spring 8.

The two ends of the inner tube are widened to form expansion openings, the end cover 82 is provided with a through hole sleeved with the inner tube body 83, the diameter of the through hole is smaller than that of the expansion openings and larger than that of the inner tube body 83, and a telescopic structure between the end cover 82 and the inner tube body 83 is formed.

The wire guide mechanism is characterized in that a guide mechanism 9 is arranged between the pressing plate 7 and the execution cylinder 5, the wire guide mechanism is composed of a guide rod 91 and a guide sleeve 92, the guide sleeve 92 is sleeved on the guide rod 91, the guide sleeve 92 and the guide rod 91 are respectively fixed on the pressing plate 7 and the execution cylinder 5, the guide mechanism 9 plays a role in positioning and guiding, and the number of the guide mechanisms can be increased as required. A gap is reserved between the head of the wire rod and the root of the guide sleeve 92, and the height of the gap is larger than the maximum lifting amount of the valve rod 3 in the opening process, so that the normal opening and closing of the valve cannot be influenced by the additionally arranged guide mechanism 9.

The pneumatic valve for the asphalt pressurization system provided by the present invention is described in detail above, and the principle and the implementation of the present invention are explained by applying specific examples herein, and the description of the above examples is only used to help understand the method and the core idea of the present invention; while the invention has been described in terms of specific embodiments and applications, it will be apparent to those skilled in the art that numerous variations and modifications can be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The utility model provides a pneumatic valve for pitch pressurization system, includes valve body, valve rod, case, direction lid and execution cylinder, its characterized in that: the valve body and the valve core are additionally arranged at the sealing position, the valve body is embedded on the valve body, the sealing surface of the top of the valve body, which is combined with the valve core, is a conical surface, a conical boss is arranged at the middle lower part of the valve rod, and a conical groove matched with the conical boss is formed in the inner side of the guide cover; the valve rod is fixedly connected with the execution cylinder, and a plurality of springs are arranged between the top of the pressure plate and the inner top surface of the execution cylinder.

2. A pneumatic valve for an asphalt pressurization system as set forth in claim 1, wherein: the valve body piece is ring-shaped, and the valve body piece is made of hard alloy materials.

3. A pneumatic valve for an asphalt pressurization system as set forth in claim 1, wherein: and a positioning bracket for positioning the spring is arranged between the pressing plate and the execution cylinder.

4. A pneumatic valve for an asphalt pressurization system according to claim 3, wherein: the positioning support is composed of an inner pipe body, two end covers and two positioning blocks, the positioning blocks are fixed on the pressing plate and the execution cylinder respectively through fastening screws, the end covers are sleeved at two ends of the inner pipe body and cover the positioning blocks in the end covers, the spring is sleeved on the positioning support and located between the two end covers, a telescopic structure is adopted between the end covers and the inner pipe body, and the telescopic amount of the telescopic structure is larger than the maximum lifting amount of the valve rod in the opening process.

5. A pneumatic valve for an asphalt pressurization system according to claim 4, wherein: the inner tube is characterized in that two ends of the inner tube are widened to form expansion openings, the end cover is provided with a through hole sleeved with the inner tube body, and the diameter of the through hole is smaller than that of the expansion openings and larger than that of the inner tube body.

6. A pneumatic valve for an asphalt pressurization system as set forth in claim 1, wherein: and a guide mechanism is arranged between the pressing plate and the execution cylinder.

7. A pneumatic valve for an asphalt pressurization system according to claim 6, wherein: the guide mechanism is composed of a guide rod and a guide sleeve, the guide sleeve is sleeved on the guide rod, the guide sleeve and the guide rod are respectively fixed on the pressing plate and the execution cylinder, a gap is reserved between the head of the guide rod and the root of the guide sleeve, and the height of the gap is larger than the maximum lifting amount of the valve rod in the opening process.