阅读说明：本技术 一种炭黑生产线中的放散阀 (Bleeding valve in carbon black production line ) 是由 张体修 胡琪 陈忠斌 袁俊飞 付金华 于 2021-08-03 设计创作，主要内容包括：本发明涉及放散阀技术领域,更具体而言,涉及一种炭黑生产线中的放散阀。放散阀包括阀体、阀盖、驱动机构与调气机构；该放散阀用于炭黑生产线,在正常生产中废气通过管路输送到脱硫塔进行处理此时装置必须封闭,不向外界泄露废气；当箱体内因生产不稳定,造成压力过高,该放散阀又能及时泄压,防止袋滤器损坏；当停机检修时该放散阀能自动打开排出箱体内所有废气并保持箱体与外界相通；密闭效果好,有效防止了尾气泄露问题；利用阀体内部压力,实现了泄压或密闭的自动调节；该放散阀结构简单,配合容易,能够实现快速、自动放散,易于检修,并能保证长时间稳定运行。(The invention relates to the technical field of a bleeding valve, in particular to a bleeding valve in a carbon black production line. The bleeding valve comprises a valve body, a valve cover, a driving mechanism and an air regulating mechanism; the bleeding valve is used for a carbon black production line, and in normal production, waste gas is conveyed to a desulfurizing tower through a pipeline for treatment, so that the device must be closed, and the waste gas is not leaked to the outside; when the pressure in the box body is too high due to unstable production, the relief valve can relieve the pressure in time, so that the bag filter is prevented from being damaged; when the machine is stopped for maintenance, the bleeding valve can automatically open and discharge all waste gas in the box body and keep the box body communicated with the outside; the sealing effect is good, and the problem of tail gas leakage is effectively prevented; the pressure relief or the closed automatic regulation is realized by utilizing the internal pressure of the valve body; the bleeding valve is simple in structure, easy to match, capable of achieving rapid and automatic bleeding, easy to maintain and capable of guaranteeing long-time stable operation.)

1. The utility model provides a blow-off valve, includes the valve body and is used for sealing the open-ended valve gap in valve body upper end, its characterized in that still includes:

the driving mechanism is used for driving the valve cover to open or close relative to the valve body;

the mechanism of transferring qi includes:

the positioning cover and the valve cover are mutually nested to form a hollow cavity, and the nested part forms axial sliding connection through clearance fit;

the pressing piece is arranged in the cavity; the pressing piece is provided with a first state of pressing the valve cover to enable the valve cover to be sealed with the valve body and a second state of pushing the valve cover to be far away from the valve body by air pressure in the valve body.

2. The bleed valve of claim 1, further comprising:

the stuffing box is arranged on the valve body, and stuffing is arranged in the stuffing box; the valve cover realizes the relative sealing of the valve body by pressing the packing.

3. A bleed valve as in claim 1, wherein: the valve cover is connected with the positioning cover in a sliding mode through a rail.

4. A bleed valve as in claim 1, wherein the drive mechanism comprises:

the rotating seat is fixedly connected to the outer wall of the valve body and provided with a rotating shaft;

the back plate is rotatably connected with the rotating seat through the rotating shaft, and the other end of the back plate is fixedly connected with the positioning cover;

and the motor is used for driving the back plate to rotate around the rotating shaft.

5. The bleed valve of claim 4, further comprising:

the first gear is arranged at the end part of a motor shaft of the motor;

the second gear is arranged at the end part of the back plate close to the rotating seat; the rotating central axis of the second gear is superposed with the rotating central axis of the rotating shaft;

the first gear and the second gear are meshed with each other.

6. A bleed valve as in claim 5, wherein: the second gear is a sector gear.

7. A bleed valve as in claim 5, wherein: the back plates are arranged in two, and the two back plates are separated from two sides of the second gear.

8. The bleed valve of claim 1, wherein the air regulating mechanism further comprises:

one end of the air inlet pipe is communicated with the valve body, and the other end of the air inlet pipe is connected with the air regulating valve;

the inner cavity of the air regulating valve is provided with a piston which is in sliding seal fit along the horizontal direction; the piston is provided with a first channel and a second channel; the piston is provided with a first position in the air regulating valve, wherein the first position enables the first channel to be communicated with the air inlet pipe and the air outlet pipe, and a second position enables the second channel to be communicated with the air outlet pipe and the air outlet pipe;

one end of the air outlet pipe is connected with the air regulating valve, and the other end of the air outlet pipe is communicated with the pressing piece;

one end of the exhaust pipe is connected with the air regulating valve, and the other end of the exhaust pipe is communicated with the atmosphere;

the compression member is a collapsible bladder.

9. The bleed valve of claim 8, further comprising:

the calibration pipe is communicated with the first end part of the air regulating valve; setting the pressure in the calibration pipe to be a given pressure;

the balance pipe is communicated with the second end part of the air regulating valve, and the other end part of the balance pipe is communicated with the air inlet pipe;

the joint of the first end and the second end of the piston and the air regulating valve is sealed relatively.

Technical Field

The invention relates to the technical field of a bleeding valve, in particular to a bleeding valve in a carbon black production line.

Background

At present, most of waste gas generated in chemical production is discharged into the air through a high-altitude chimney, and does not meet the requirement of environmental protection, so the waste gas needs to be orderly discharged after being treated; in the waste gas treatment process, the device is not free from fluctuation, and when the pressure is too high, the device can be damaged, so that a pressure relief device is often installed on a waste gas pipeline, and the normal and safe operation of a system is protected.

In the carbon black production line, the waste gas from the main bag, the waste bag, the main vein and the waste vein is conveyed to a desulfurization tower for desulfurization and denitrification treatment and then discharged to the atmosphere, and because the bag filter is damaged if the pressure in the main bag and the waste bag box is too high, the box body needs to be ventilated with the atmosphere when the machine is shut down for maintenance. The existing bleeding valve can automatically release pressure, but is inconvenient to overhaul. And because the sealing is realized by the dead weight, the force for pressing the filler is reduced due to the fluctuation of the pressure in the system, and the leakage is caused because of the untight sealing.

In view of this, it is necessary to design a relief valve that can automatically relieve pressure, prevent leakage, and facilitate maintenance.

Disclosure of Invention

The invention aims to provide a relief valve in a carbon black production line, which can automatically relieve pressure, prevent leakage and is convenient to overhaul.

The utility model provides a blow-off valve, includes the valve body and is used for sealing the open-ended valve gap in valve body upper end, still includes:

the driving mechanism is used for driving the valve cover to open or close relative to the valve body;

the mechanism of transferring qi includes:

the positioning cover and the valve cover are mutually nested to form a hollow cavity, and the nested part forms axial sliding connection through clearance fit;

the pressing piece is arranged in the cavity; the pressing piece is provided with a first state of pressing the valve cover to enable the valve cover to be sealed with the valve body and a second state of pushing the valve cover to be far away from the valve body by air pressure in the valve body.

In some embodiments of the present application, the valve further comprises a stuffing box disposed on the valve body, wherein a stuffing is disposed in the stuffing box; the valve cover realizes the relative sealing of the valve body by pressing the packing.

In some embodiments of the present application, the valve cover is slidably connected to the positioning cover through a rail for slidably guiding and preventing the valve cover from being separated from the positioning cover.

In some embodiments of the present application, the drive mechanism comprises:

the rotating seat is fixedly connected to the outer wall of the valve body and provided with a rotating shaft;

the back plate is rotatably connected with the rotating seat through the rotating shaft, and the other end of the back plate is fixedly connected with the positioning cover;

and the motor is used for driving the back plate to rotate around the rotating shaft.

In some embodiments of the present application, the apparatus further comprises a first gear installed at an end of a motor shaft of the motor;

the second gear is arranged at the end part of the back plate close to the rotating seat;

the first gear and the second gear are meshed with each other.

In some embodiments of the present application, the second gear is a sector gear.

In some embodiments of the present application, the back plates are two, and two of the back plates are separated from two sides of the second gear.

In some embodiments of the present application, the air adjustment mechanism further comprises:

one end of the air inlet pipe is communicated with the valve body, and the other end of the air inlet pipe is connected with the air regulating valve;

the air regulating valve is internally provided with a piston which is in sliding seal fit along the horizontal direction; the piston is provided with a first channel and a second channel; the piston is provided with a first position in the air regulating valve, wherein the first position enables the first channel to be communicated with the air inlet pipe and the air outlet pipe, and a second position enables the second channel to be communicated with the air outlet pipe and the air outlet pipe;

one end of the air outlet pipe is connected with the air regulating valve, and the other end of the air outlet pipe is communicated with the pressing piece;

one end of the exhaust pipe is connected with the air regulating valve, and the other end of the exhaust pipe is communicated with the atmosphere;

the compression member is a collapsible bladder.

In some embodiments of the present application, the calibration tube is disposed at the first end of the air regulating valve; setting the pressure in the calibration pipe to be a given pressure;

the balance pipe is communicated with the second end part of the air regulating valve, and the other end part of the balance pipe is communicated with the air inlet pipe;

the joint of the first end and the second end of the piston and the air regulating valve is sealed relatively.

Compared with the prior art, the bleeding valve provided by the embodiment of the invention has the beneficial effects that:

1. the valve cover is opened or the valve body is sealed through the driving mechanism, so that the relief valve and the pipeline can be conveniently overhauled and cleaned; the motor drives the gear to provide driving power, and meanwhile, the rotating seat and the back plate form limit on the sector gear, so that the stable and accurate opening and closing action process of the valve cover is ensured;

2. automatic pressure relief is realized through the air regulating mechanism; the valve cover is pressed or loosened through the pressing piece, so that the sealing or pressure relief of the valve body is realized; the pressing piece adopts a contractible expansion bag, and the valve body is communicated with the pressing piece to realize sealing of the valve body or communicated with the atmosphere to realize pressure relief through the arrangement of an air regulating valve; the automatic pressure relief is realized through the arrangement of the calibration pipe and the balance pipe and the opposition of the internal pressure of the valve body and the given pressure of the calibration pipe;

3. the bleeding valve is used for a carbon black production line, and in normal production, waste gas is conveyed to a desulfurizing tower through a pipeline for treatment, so that the device must be closed, and the waste gas is not leaked to the outside; when the pressure in the box body is too high due to unstable production, the relief valve can relieve the pressure in time, so that the bag filter is prevented from being damaged; when the machine is stopped for maintenance, the bleeding valve can automatically open and discharge all waste gas in the box body and keep the box body communicated with the outside;

the bleeding valve provided by the invention has a good sealing effect, and the problem of tail gas leakage is effectively prevented; the pressure relief or the closed automatic regulation is realized by utilizing the internal pressure of the valve body; the bleeding valve is simple in structure, easy to match, capable of achieving rapid and automatic bleeding, easy to maintain and capable of guaranteeing long-time stable operation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

FIG. 1 is a schematic view of a bleed valve according to the present invention;

FIG. 2 is an enlarged view of the point A in FIG. 1;

FIG. 3 is a schematic view of the bleed state of the bleed valve;

FIG. 4 is an enlarged view of the point B in FIG. 3;

FIG. 5 is a schematic view of a bleed valve service condition;

FIG. 6 is a schematic view of a bleed valve for use in a carbon black manufacturing line.

In the figure, 1, a valve body; 2. a valve cover; 3. a drive mechanism; 301. a rotating base; 302. a rotating shaft; 303. a back plate; 304. a motor; 305. a first gear; 306. a second gear; 4. a gas regulating mechanism; 401. a positioning cover; 402. a compression member; 403. an air inlet pipe; 404. a gas regulating valve; 405. an air outlet pipe; 406. an exhaust pipe; 407. calibrating the tube; 408. a balance tube; 409. a valve body joint; 410. a pouch connector; 411. a piston; 412. a first channel; 413 a second channel; 5. a stuffing box; 51. and (4) filling.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

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 one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

As shown in fig. 1, a bleeding valve according to a preferred embodiment of the present invention includes a valve body 1, a valve cap 2 for closing an upper end opening of the valve body 1, a driving mechanism 3, and an air regulating mechanism 4.

On the basis of the above embodiment, the bleeding valve further comprises a packing box 5, wherein the packing box 5 is arranged on the valve body 1, and a packing 51 is arranged in the packing box 5; the valve cover 2 realizes the relative sealing of the valve body 1 by pressing the packing 51. The packing 51 is pressed by the valve cover 2 by means of the gravity of the valve cover, and the packing 51 is pressed on the sealing surface to play a sealing role.

In some embodiments of the present application, the valve cap 2 is slidably connected to the positioning cover 401 through a rail, a plurality of sliding rails are disposed on a side surface of the positioning cover 401, the valve cap 2 is provided with a protrusion adapted to the sliding rails, and the protrusion is slidably connected to the sliding rails for slidably guiding the valve cap 2; the tail end of the slide rail is closed, and the slide rail is used for preventing the valve cover 2 from being separated from the positioning cover 401.

[ Driving mechanism ]

In addition to the above-described embodiments, the driving mechanism 3, as shown in fig. 1, includes:

the rotary seat 301 is fixedly connected to the outer wall of the valve body 1, and the rotary seat 301 is provided with a rotating shaft 302;

the back plate 303 is rotatably connected with the rotating base 301 through the rotating shaft 302, and the other end of the back plate 303 is fixedly connected with the positioning cover 401;

a motor 304, wherein the motor 304 is used for driving the back plate 303 to rotate around the rotating shaft 302.

In some embodiments, the present application further comprises a first gear 305, wherein the first gear 305 is mounted at an end of the motor 304 shaft of the motor 304;

a second gear 306, wherein the second gear 306 is mounted at the end of the back plate 303 close to the rotary base 301; the second gear 306 is fixedly connected to the rotating base 301 through a bolt;

the first gear 305 and the second gear 306 are intermeshed.

On the basis of the above embodiment, the second gear 306 is a sector gear. In the rotation process of the sector gear, the back plate 303 is abutted with the rotating seat 301 to form a first limit position of the sector gear; the valve cover 2 below the back plate 303 forms a second limit of the sector gear when being parallel to the contact surface of the valve body 1; when the sector gear is in a first limiting state, the valve cover 2 is in an opening state, and the valve body 1 can be overhauled or cleaned at the moment; when the sector gear is in the second limiting state, the valve cover 2 is in the working state and can automatically release pressure to the valve body 1.

On the basis of the above embodiment, two back plates 303 are provided, and the two back plates 303 are separated from two sides of the second gear 306, so that the back plates 303 and the second gear 306, the back plates 303 and the positioning cover 401, and the back plates 303 and the rotating base 301 are stably connected, and meanwhile, the symmetrical structure ensures stable rotation.

[ air-regulating mechanism ]

On the basis of the above embodiment, as shown in fig. 2, the air adjustment mechanism 4 includes:

the positioning cover 401 and the valve cover 2 are mutually nested to form a hollow cavity, and the nested part forms axial sliding connection through clearance fit; the positioning cover 401 is fixedly arranged above the valve cover 2 and used for providing a track and a limit for the valve cover 2 to slide up and down relative to the valve body 1; when the valve cover 2 slides to the lowest position, the upper end part is nested with the positioning cover 401, and the lower end part is abutted with the valve body 1; when the valve cover 2 slides to the uppermost position, the upper end part is nested with the positioning cover 401, and the lower end part has a certain gap with the valve body 1;

a compression member 402 disposed in the cavity; the pressing member 402 has a first state in which the bonnet 2 is pressed to seal the bonnet 2 with the valve body 1 and a second state in which the bonnet 2 is pushed away from the valve body 1 by the air pressure inside the valve body 1.

The air adjusting mechanism 4 comprises a positioning cover 401 and a pressing piece 402;

the compression member 402 is a collapsible bladder or a telescoping mechanism;

when the pressing member 402 is a contractible bag, the air regulating mechanism 4 further comprises

An air inlet pipe 403, one end of the air inlet pipe 403 is communicated with the valve body 1, and the other end is connected with an air regulating valve 404; the air inlet pipe 403 is communicated with the valve body 1 through a valve body joint 409, and the air inlet pipe 403 is a hard pipe;

the air regulating valve 404 is provided with a piston 411 which is in sliding sealing fit along the horizontal direction in the air regulating valve 404, as shown in fig. 4; the piston 411 is provided with a first passage 412 and a second passage 413; the piston 411 is provided with a first position in the air regulating valve 404, wherein the first position enables the first passage 412 to communicate the air inlet pipe 403 with the air outlet pipe 405, and a second position enables the second passage 413 to communicate the air outlet pipe 405 with the air outlet pipe 406; the air regulating valve 404 is fixedly arranged in the rotary seat 301, the section of the rotary seat 301 is of an L-shaped structure, the transverse end of the rotary seat 301 is fixedly connected with the valve body 1, the fixed connection is welding, the vertical end extends to the horizontal plane of the upper back plate 303 when the valve cover 2 is in a normal working state, the vertical end is of a concave structure, the top end of the concave structure is provided with a rotating shaft, the concave structure provides a back plate rotating space, and the bottom of the concave structure forms back plate rotation limiting; a certain space is formed between the rotary seat 301 and the valve body 1; the air regulating valve 404 is fixedly arranged in a space between the rotary seat 301 and the valve body 1;

one end of the air outlet pipe 405 is connected with the air regulating valve 404, and the other end of the air outlet pipe 405 is communicated with the pressing piece 402; the air outlet pipe 405 is communicated with the shrinkage and expansion bag through a bag connector 410, and the bag connector 410 penetrates through the positioning cover 401; the air outlet pipe 405 is a flexible pipe;

and an exhaust pipe 406, one end of the exhaust pipe 406 is connected with the air regulating valve 404, and the other end is communicated with the atmosphere.

On the basis of the above embodiment, the device further comprises a calibration pipe 407, which is communicated with the first end of the air regulating valve 404; the pressure in the calibration tube 407 is set to a given pressure;

the balance pipe 408 is communicated with the second end of the air regulating valve 404, and the other end of the balance pipe 408 is communicated with the air inlet pipe 403;

the piston 411 is sealed against the connection of the first and second ends of the air regulating valve 404.

When the pressing piece 402 is a telescopic mechanism, the telescopic rod penetrates through the positioning cover 401, and the tail end of the telescopic rod is abutted to the valve cover 2; when the telescopic rod is in the maximum stroke, the telescopic rod presses the valve cover 2 to seal the valve cover 2 and the valve body 1; when the telescopic rod is in the minimum stroke, the valve cover 2 can be pushed by the air pressure in the valve body 1 to be far away from the valve body 1; the operation of the telescopic mechanism can be controlled by a manual or control system.

[ application of bleeding valve ]

As shown in fig. 6, a carbon black production line in which an exhaust gas treatment device is provided with the bleeding valve described in the above embodiment.

[ bleed valve operation principle ]

When the production system is in operation, the generated waste gas is conveyed to a desulfurizing tower through a pipeline by the box body for waste gas desulfurization treatment, the waste gas is discharged into the atmosphere according with the environmental protection requirement, and the bleeding valve compresses the filler 51 to keep sealing through the self weight of the valve cover 2.

When the production system is unstable, pressure fluctuation exists in the box body, the fluctuation generated in an allowable pressure range can be balanced through the air adjusting mechanism 4, and the force acting on the filler 51 is always the pressure of the pressing piece 402 and the weight of the valve cover 2. Further, when the pressure in the tank is lower than a given pressure (the given pressure is the maximum allowable pressure in the tank), the pressure in the calibration pipe 407 is the given pressure, and the pressure in the calibration pipe 407 is constant due to the external instrument air passing through the regulating valve. At this time, the pressure in the calibration pipe 407 is greater than the pressure in the balance pipe 408 and the pressure in the box body, the piston 411 in the air regulating valve 404 is in the state shown in fig. 2 due to the pressure at the two ends, the tail gas in the box body is communicated with the contracting and expanding bag through the piston 411 communication hole, the pressure in the contracting and expanding bag is always equal to the pressure in the cylinder body, the air pressure of the contracting and expanding bag pushes the valve cover 2 to slide in the positioning cover 401, the force for pressing the filler 51 is not changed due to the fluctuation of the pressure in the box body, the gravity of the valve cover 2 is always the gravity of the valve cover 2, and the sealing cannot fail due to insufficient pressure due to the fluctuation of the pressure in the box body within an allowable range.

The cloth filter bag in the box body has limited pressure resistance, the highest pressure is allowed to be given by external instrument air through the regulating valve and is connected with the calibration pipe 407, when the pressure in the box body is higher than the allowed highest pressure and the given pressure, the piston 411 of the air regulating valve 404 is in the state shown in fig. 3 under the pressure action of the balance pipe 408 and the calibration pipe 407, the communication between the box body and the shrinkage and expansion bag is disconnected due to the movement of the piston 411, the exhaust pipe 406 is connected with the shrinkage and expansion bag, the air in the shrinkage and expansion bag is exhausted into the atmosphere through the exhaust pipe 406, the shrinkage and expansion bag is decompressed, and the air pressure in the box body overcomes the gravity of the valve cover 2 to support the valve cover 2 for decompression.

As shown in fig. 5, when the maintenance is stopped, the general control room sends a current signal to switch on the control cabinet where the servo motor 304 is located, or a field operator can press a start button of the servo motor 304, the motor 304 is powered on to operate and rotate through the first speed-changing gear 305 of the reduction gearbox, the first gear 305 drives the second gear 306 meshed with the first gear to rotate, the rotation of the second gear 306 drives the back plate 303 and the positioning cover 401, and the positioning cover 401 drives the valve cover 2 to rotate around the rotating shaft 302, so that the valve cover 2 is opened. After the maintenance is finished, the master control room sends out an electric signal to enable the servo motor 304 to rotate reversely to complete the return of the positioning cover 401 to the original position state.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.