A kind of valve that can prevent to stop up and that can control the powdered substance flow
Technical field
The present invention relates to a kind of valve, relate in particular to a kind of valve that is applied to the flow control of powdered substance, be applied to the interpolation control of the Powdered affix in the iron and steel metallurgical industry.
Background technique
In iron and steel metallurgical industry, there are many occasions need use the powdery type material at present, the carbon dust that adds in the electric furnace for example, protecting slag that adds in the crystallizer or the like.And in order to guarantee the quality of molten steel or product, the powdery type amount of substance that adds in equipment there is strict control, before carrying this type of powdered rubber access arrangement, all be provided with the valve that is used for flow control for this reason, as shown in Figure 1, general standardized at present ball valve or the dish valve etc. of adopting of these valves.
Use conventional valves under the prior art is carried out flow control, mainly is to rely on the negotiable useful area that changes spool in the valve, as shown in Figure 2, with the ball valve is example, its spool is a manhole, and the passage of valve body also is circular logical empty, and spool can rotate, when valve core rotation, the logical sky on the spool and the passage of valve body cross one another, and the useful area of valve channel changes thereupon, and the maximum flow area is when the central lines of two logical skies, and when two center lines were vertical, passage was then closed fully.Valve is when regulating flow, and the circle of the shape of passage when maximum is arranged gradually becomes fusiformis, thoroughly closes until valve.
But because the powdery type material belongs to solid matter, and solid matter has graininess liquid and that gaseous substance is not had, and powdered substance can lump owing to making moist in transportation process or long term storage, makes particle further increase.
And the fusiformis shape that valve passage under the prior art and spool are constituted when Flow-rate adjustment; because the width of powdery type substance circulating is less; when in case particle that quilt is bigger or foreign matter block; the area that causes this passage to can be used for circulating dwindles, and the passage after dwindling also easily by follow-up be not that very big particle is blocked, thereby cause chain reaction; cause flow uncontrollable; until whole obstructions, cause equipment downtime, influenced quantity-produced greatly and carried out.
Publication number CN201267774, the Chinese patent in open day on July 8th, 2009 a kind ofly relates to the double valve powder flow controller that automatic production apparatus for grinding powder paint is used, and belongs to the automatic production apparatus for grinding powder paint technical field.The grinding powder paint double valve powder flow controller of this model utility, it is characterized in that connecting the hobboing cutter that drives enclosure interior by actuating motor, pneumatic dish valve is established on housing top, pneumatic dish valve connects whirly deduster bottom discharge port, be made of hobboing cutter and add valve soon, pneumatic dish valve constitutes and adds valve slowly.The grinding powder paint double valve powder flow controller of this model utility adopts pneumatic dish valve, air valve and Electrical Control Technology, accurately control.
This patent is improved the hobboing cutter that actuating motor connects the drive enclosure interior by adopting, pneumatic dish valve is established on housing top, pneumatic dish valve connects whirly deduster bottom discharge port, constitute by hobboing cutter and to add valve soon, pneumatic dish valve constitutes the method that adds valve slowly and comes the flow of powdered substance is accurately controlled, but this patent structure complexity, cost is higher, and this patent does not still solve the powdery granule problem that particulate material that caking forms results in blockage of making moist.
In sum, valve under the prior art is owing to structural reason itself, exist particulate powder to be blocked in the problem at spool place easily, satisfy the production needs so now press for a kind of flow control valve that is applicable to that powdered substance uses, not only can solve the flow control problem of powdered substance, and can solve make moist particulate material that caking back forms of powder and stop up the problem of spool.
Summary of the invention
Can't solve the powder caking back that makes moist and form particulate material in order to solve various types of valves under the prior art, cause flow uncontrollable, cause the spool blocking problem at last, the invention provides a kind of valve that can prevent to stop up and that can control the powdered substance flow, the valve that purpose is to overcome under the prior art causes because valve passage is the fusiformis shape stopping up easily and the unmanageable problem of flow, and concrete structure of the present invention is as described below:
A kind of valve that can prevent to stop up and that can control the powdered substance flow comprises valve body, valve gap and spool, it is characterized in that:
Described valve body is the inversed taper platform shape, and the lower end is a blanking port, and upper end open is provided with the valve body internal thread at this opening, and valve gap spins by valve gap outside thread on the valve gap and valve body internal thread, valve gap is fixed in the upper end open place of valve body;
Described spool passes valve gap and is arranged at inner valve body, and stretch out from the upper end of valve gap the upper end that is specially spool, and the lower end of spool enters in the valve body cavity that is all the inversed taper platform shape of valve inner by valve gap.
According to a kind of valve that can prevent to stop up and that can control the powdered substance flow of the present invention, it is characterized in that a side of described valve body offers material feeding mouth, this material feeding mouth is connected with the valve body cavity of valve inner.
According to a kind of valve that can prevent to stop up and that can control the powdered substance flow of the present invention, it is characterized in that, described valve gap is the circle lid shape design of intermediate throughholes formula, upper end at the inwall of this intermediate throughholes is provided with the valve gap internal thread, lower end at inwall is provided with seal groove, is provided with seal ring in the sealing ring recess.
Be provided with seal ring in the seal groove, sealing is enclosing fixed spool and is preventing the effect that powdered substance pours in down a chimney.
According to a kind of valve that can prevent to stop up and that can control the powdered substance flow of the present invention, it is characterized in that, described spool comprises handle, spool main body and working end, handle is connected with an end of spool main body, and handle stretches out the upper end of valve gap, the upper end of spool main body is provided with the spool outside thread, this spool outside thread matches with the valve gap internal thread of the inwall upper end of the intermediate throughholes of valve gap, the other end of spool main body connects the working end, this working end is a cone table shape, the upper end of working end is identical with the spool size of main body, and the diameter of bottom, its lower end is greater than the diameter of the blanking port of valve body lower end, and less than the diameter of valve body cavity.
Because valve gap and spool are detachable design for can screw out or screw in by screw thread, installation and maintenance are convenient.And the upper end of working end is identical with the spool size of main body, the diameter of its bottom, lower end is greater than the diameter of the blanking port of valve body lower end, and less than the diameter of valve body cavity, the purpose of this design is, by handle with spool place the valve body cavity bottom the time block blanking port, promptly risen and closed seal action, otherwise, up unscrew spool by handle, promptly equal to open blanking port, carry out blanking work.
According to a kind of valve that can prevent to stop up and that can control the powdered substance flow of the present invention, it is characterized in that the valve body cavity of the working end of described spool and valve inner constitutes an annular working channel space.
Specifically acting as of this annular working channel space, the powdered substance that enters from material feeding mouth enters the valve body cavity, pass through this channel space again, discharge from the discharge port of valve body lower end at last, owing to can revolve by screw thread and send or screw spool, spool is moved up and down, this annular working channel space can be amplified to be dwindled, make it obtain to regulate the effect of control flow rate, the annular working channel space is compared than the shuttle shape outlet of ball valve under the prior art or dish valve in addition, is difficult for more during discharging stopping up.
A kind of valve that also can control the powdered substance flow that stops up that can prevent of the present invention has solved the difficult problem that valve passage is the fusiformis shape and causes stopping up easily, and major technique of the present invention is characterised in that:
1. the working end of spool and the valve body cavity of valve inner are constituted an annular working channel space, no matter this annular working channel space is at the circulation area maximum rating, still all keeps annular in the change process of circulation area;
2. the working end of spool is cone table shape;
3. the body cavity of valve body is the inversed taper platform shape;
4. the frustum shape of spool working end and body cavity is in the other direction.
Use valve that can prevent to stop up and that can control the powdered substance flow of the present invention, obtain following beneficial effect:
1. valve that can prevent to stop up and that can control the powdered substance flow of the present invention is applicable to the powdery type material, is difficult for stopping up.
2. valve that can prevent to stop up and that can control the powdered substance flow of the present invention, it is convenient to regulate control flow rate.
3. valve that can prevent to stop up and that can control the powdered substance flow of the present invention, convenient disassembly is convenient to the maintenance man and is safeguarded, has reduced equipment downtime, and what guaranteed to produce carries out continuously.
4. valve that can prevent to stop up and that can control the powdered substance flow of the present invention, simple in structure, easy to make, cost is low.
Description of drawings
Fig. 1 is the concrete structure schematic representation of the ball valve under the prior art;
Fig. 2 causes the concrete schematic representation of particulate material blockage problem owing to structural reason for the ball valve under the prior art;
Fig. 3 is a kind of concrete structure schematic representation that can prevent to stop up and that can control the valve of powdered substance flow of the present invention;
Fig. 4 is the concrete structure enlarged view of the annular working channel space of a kind of valve that can prevent to stop up and that can control the powdered substance flow of the present invention;
Fig. 5 is the concrete structure schematic representation of the valve body of a kind of valve that can prevent to stop up and that can control the powdered substance flow of the present invention;
Fig. 6 is the concrete structure schematic representation of the valve gap of a kind of valve that can prevent to stop up and that can control the powdered substance flow of the present invention;
Fig. 7 is the concrete structure schematic representation of the valve core of a kind of valve that can prevent to stop up and that can control the powdered substance flow of the present invention;
Fig. 8 is a kind of concrete work schematic representation that can prevent to stop up and that can control the valve of powdered substance flow of the present invention;
Fig. 9 is a kind of work schematic representation of particulate material when the annular working channel space is obstructed that can prevent to stop up and that can control the valve of powdered substance flow of the present invention.
Among the figure: A-annular working channel space 1-valve body, 1A-blanking port, 1B-valve body internal thread, 1C-valve body cavity, 1D-material feeding mouth, 2-valve gap, 2A-valve gap outside thread, 2B-valve gap internal thread, 2C-seal groove, the 2D-seal ring, 3-spool, 3A-handle, 3B-spool main body, 3C-working end, 3D-spool outside thread, 4-annular working channel space, the large-scale powder particle of 5-.
Embodiment
Below in conjunction with accompanying drawing and embodiment a kind of valve that stops up and can control the powdered substance flow that can prevent of the present invention is described further.
Embodiment
The specific operation of valve that can prevent to stop up and that can control the powdered substance flow of the present invention are as follows:
Extremely shown in Figure 9 as Fig. 3, by the handle 3A on the rotary spool 3, because valve gap internal thread 2B and spool outside thread 3D cooperatively interact, make spool main body 3B to move axially at the intermediate throughholes place of valve gap 2, the working end 3C of the cone table shape of spool bottom also is subjected to displacement thereupon simultaneously, in addition, the inwall lower end of the intermediate throughholes of valve gap is provided with seal groove 2C, is provided with seal ring 2D in the sealing ring recess.Because the valve body cavity 1C of valve body 1 is the inversed taper platform shape, make the width of the annular working channel space 4 that the working end constituted of valve body cavity and spool also change, thus the purpose of control flow rate.
As Fig. 8 and shown in Figure 9; when large-scale powder particle 5 enters coupled logical valve body cavity 1C by the material feeding mouth 1D of valve body 1; and when entering annular working channel space 4; when being obstructed greater than the width of annular working channel space owing to granularity; for the annular working channel space; also only be to block up at some points; do not hinder the circulation of the powder in other path; descend the fusiformis passage of ball valve or dish valve etc. compared to existing technology; it is broad more that the annular pass can continue on for the path of powder circulation; when not being very big as this particle in addition; only need to shut down the back and up screw out spool by handle 3A; this particle can drop out from blanking port 1A naturally because the width of annular working channel space becomes big, is too big really as this particle; the valve gap 2 of only need directly outwarding winding this moment; its taking-up is got final product, convenient and safety, also less to the equipment downtime influence.
A kind of valve that can prevent to stop up and that can control the powdered substance flow of the present invention, simple in structure, cost is lower, but its using effect is better, solved ball valve or the easy blocking problem of dish valve under the prior art, and the energy control flow rate, a kind of valve that stops up and can control the powdered substance flow that can prevent of the present invention is applied to need add in the iron and steel metallurgical industry occasion of powdered substance under may command flow situation, or other association areas.