Anti-blocking pneumatic control valve

Abstract

The utility model relates to the technical field of pneumatic control valves, in particular to an anti-blocking pneumatic control valve which comprises a valve body, a pneumatic cavity and a valve rod, the pneumatic cavity is arranged above the valve body, the top end of the valve rod extends into the pneumatic cavity and is provided with an ejector block, and a diaphragm is arranged between the ejector block and the inner wall of the pneumatic cavity. And a spring is arranged at the bottom end of the top block in the pneumatic cavity. When a medium flows into the valve body from the inflow end, impurities in the medium can be intercepted by the filter screen and are prevented from entering the valve body to block the valve body, in addition, in the process that a user controls opening and closing or the opening degree of the regulating valve by controlling the valve rod to move up and down, the valve rod can drive the rotating shaft to rotate through the driving assembly, and therefore the valve body is prevented from being blocked. And at the moment, the scraping blade can be attached to the outer surface of the filter screen to rotate, so that impurities left on the outer surface of the filter screen can be scraped off, the filter holes in the filter screen are prevented from being blocked by the impurities, the medium can smoothly pass through the valve body, and smooth flowing of the medium is further guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to pneumatic control valve technical field, specifically, relate to a kind of anti-clogging pneumatic control valve. BACKGROUND

[0002] Pneumatic control valve is one of industrial process control instruments widely used in petroleum, chemical industry, electric power, metallurgy and other industrial enterprises, which uses compressed air as power source, adjusts gas, liquid flow, pressure, temperature and other parameters by receiving control signal.

[0003] The existing pneumatic control valve lacks the effect of intercepting impurities in the medium during use. When the medium flows through the valve body for a long time, the impurities in the medium will accumulate in the valve body, causing blockage, and thus causing poor flow of the medium. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of anti-clogging pneumatic control valve, solve the technical problem of poor fixing effect on the head of patient in prior art.

[0005] In view of the above problems, the technical scheme provided by the utility model is:

[0006] A kind of anti-clogging pneumatic control valve, including valve body, pneumatic cavity and valve rod, the pneumatic cavity is set to the top of the valve body, the top end of the valve rod is inserted into the inside of the pneumatic cavity and is provided with top block, the diaphragm is arranged between the top block and the inner wall of the pneumatic cavity, the inside of the pneumatic cavity is located at the bottom end of the top block and is also provided with spring, the bottom end of the valve rod is inserted into the inside of the valve body and is fixedly connected with valve core, the two sides of the valve body are connected with inflow end and outflow end, the inside of the valve body is also provided with valve seat, the inflow end is fixedly installed with filter screen, the inside of the valve body is also rotatably connected with shaft, one end of the shaft passes through the inflow end and extends to the outside of the filter screen, the end of the shaft is fixedly connected with a plurality of groups of scraping pieces, which abut against the outer surface of the filter screen, drive assembly for driving the shaft to rotate is arranged between the valve rod and the shaft.

[0007] Further, the drive assembly includes a gear fixedly sleeved on the surface of the shaft, and a toothed plate arranged on the surface of the valve rod and engaged with the gear.

[0008] Further, the top end of the valve body is provided with a packing chamber, and the valve rod extends above the valve body after passing through the packing chamber.

[0009] Further, a travel scale is arranged between the valve body and the pneumatic cavity, and a pointer connected to the travel scale is arranged on the valve rod.

[0010] Further, flange rings are arranged at the end portions of the inflow end and the outflow end.

[0011] Further, the outer surface of the valve core is provided with a rubber shell.

[0012] Compared with the prior art, the beneficial effects of the utility model are that: when the medium flows into the valve body from the inflow end, the impurities in the medium are intercepted by the filter screen, preventing the impurities from entering the interior of the valve body to cause the valve body to be blocked, in addition, in the process of controlling the opening and closing or opening degree of the regulating valve by controlling the up and down movement of the valve rod, the valve rod will drive the rotating shaft to rotate through the driving assembly, at this time, the scraping piece will be attached to the outer surface of the filter screen to rotate, thereby the impurities remaining on the outer surface of the filter screen can be scraped off, further avoiding the impurities from blocking the filter holes on the filter screen, so that the medium can smoothly pass through the valve body, further ensuring the smooth flow of the medium. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for the ordinary skilled person in the art, on the premise of not paying the creative labor, other related drawings can also be obtained according to these drawings.

[0014] Fig. 1 It is the appearance structure schematic diagram of the utility model;

[0015] Fig. 2 It is the internal structure schematic diagram of the valve body in the utility model;

[0016] Fig. 3 It is the internal structure schematic diagram of pneumatic cavity in the utility model;

[0017] Fig. 4 It is the structure schematic diagram of driving assembly in the utility model.

[0018] In the drawing: 1, valve body;2, pneumatic cavity;3, valve rod;4, top block;5, diaphragm;6, spring;7, valve core;8, inflow end;9, outflow end;10, valve seat;11, filter screen;12, rotating shaft;13, scraping piece;14, gear;15, toothed plate;16, packing chamber;17, stroke scale;18, pointer;19, flange ring. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] Please refer to Figs. 1-4The utility model provides a kind of anti-clogging pneumatic regulating valve, including valve body 1, pneumatic cavity 2 and valve stem 3, pneumatic cavity 2 is set to the top of valve body 1, its top end is connected with air pump, gas can be filled in pneumatic cavity 2 from the top end of pneumatic cavity 2 or be extracted from pneumatic cavity 2 by air pump, the top end of valve stem 3 extends into the inside of pneumatic cavity 2 and is provided with top block 4, diaphragm 5 is arranged between top block 4 and the inner wall of pneumatic cavity 2, spring 6 is also provided in the inside of pneumatic cavity 2 at the bottom end of top block 4, diaphragm 5 forms the isolation layer of up and down in the inside of pneumatic cavity 2, when gas is filled from the top end of pneumatic cavity 2, diaphragm 5 expands downwards to push top block 4 to move downwards, when gas is extracted from the top end of pneumatic cavity 2, diaphragm 5 shrinks, and top block 4 moves upwards under the rebound action of spring 6, to fill air or extract air in the inside of pneumatic cavity 2 by air pump can control valve stem 3 to move up and down, the bottom end of valve stem 3 extends into the inside of valve body 1 and is fixedly connected with valve core 7, the two sides of valve body 1 are connected with inflow end 8 and outflow end 9, valve body 1 is also provided with valve seat 10 in the inside, valve seat 10 divides the inside of valve body 1 into two chambers, inflow end 8 is connected to the upper chamber of valve seat 10, outflow end 9 is connected to the lower chamber of valve seat 10, when valve stem 3 drives valve core 7 to move downwards, can make valve core 7 block the valve hole on valve seat 10, when valve stem 3 drives valve core 7 to move downwards, the valve hole on valve seat 10 is no longer blocked by valve core 7, and the medium can flow into valve body 1 from inflow end 8 and flow out from outflow end 9, and by controlling the up and down movement of valve stem 3 to adjust the distance between valve core 7 and valve seat 10, the size of the blocking surface on valve seat 10 can be adjusted, to adjust the opening of valve, filter screen 11 is fixedly installed on inflow end 8, can intercept the impurities in the medium flowing into the inside of valve body 1, the inside of valve body 1 is also rotatably connected with shaft 12, one end of shaft 12 passes through inflow end 8 and extends to the outside of filter screen 11, a plurality of groups of scraping blades 13 are fixedly connected to the end of shaft 12, and the outer surface of filter screen 11 is abutted, driving assembly is arranged between valve stem 3 and shaft 12, in the process of up and down movement of valve stem 3, shaft 12 can be driven to rotate by driving assembly, and scraping blade 13 rotates under the driving of shaft 12.

[0022] When the medium flows into the valve body 1 from the inflow end 8, impurities in the medium are intercepted by the filter screen 11, preventing the impurities from entering the interior of the valve body 1 and causing the valve body 1 to be blocked. The intercepted impurities remain on the outer surface of the filter screen 11. When the user controls the opening and closing or opening degree of the regulating valve by moving the valve stem 3 up and down, the valve stem 3 drives the rotating shaft 12 to rotate through the driving assembly. At this time, the scraper 13 is attached to the outer surface of the filter screen 11 and rotates, thereby scraping off the impurities remaining on the outer surface of the filter screen 11, preventing the filter holes of the filter screen 11 from being blocked by the impurities, and ensuring smooth flow of the medium through the valve body 1.

[0023] Further, please refer to Figs. 1-4 The driving assembly includes a gear 14 fixedly sleeved on the surface of the rotating shaft 12 and a toothed plate 15 arranged on the surface of the valve stem 3 and engaged with the gear 14. When the valve stem 3 moves up and down, the toothed plate 15 on the surface of the valve stem 3 drives the gear 14 to rotate, thereby driving the rotating shaft 12 to rotate under the driving action of the gear 14.

[0024] Further, please refer to Figs. 1-4 The top end of the valve body 1 is provided with a packing chamber 16. The valve stem 3 extends out of the valve body 1 above the packing chamber 16. The interior of the packing chamber 16 is used to fill flexible graphite or other sealing packing, which can seal the joint between the top end of the valve body 1 and the valve stem 3 without affecting the up-and-down movement of the valve stem 3.

[0025] Further, please refer to Figs. 1-4 The valve body 1 and the pneumatic chamber 2 are provided with a travel scale 17. The valve stem 3 is connected with a pointer 18 pointing to the travel scale 17. When the opening degree of the valve is adjusted by moving the valve stem 3 up and down, the user can intuitively understand the position of the valve stem 3 by checking the position of the pointer 18 pointed by the travel scale 17, thereby being able to more accurately control the distance between the valve core 7 at the bottom end of the valve stem 3 and the valve seat 10, facilitating the user to adjust and control.

[0026] Further, please refer to Figs. 1-4 The end portions of the inflow end 8 and the outflow end 9 are provided with flange rings 19, which are convenient for the user to connect external pipelines between the inflow end 8 and the outflow end 9 through bolts.

[0027] Further, the outer surface of the valve core 7 is provided with a rubber shell. During the contact between the valve core 7 and the valve seat 10, the rubber shell with soft material can avoid direct collision between the two, thereby preventing wear of the valve core 7 and the valve seat 10 caused by long-term and frequent contact.

[0028] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A kind of anti-clogging pneumatic regulating valve, including valve body (1), pneumatic cavity (2) and valve stem (3), the pneumatic cavity (2) is set to the top of the valve body (1), the top end of the valve stem (3) is inserted into the inside of the pneumatic cavity (2) and is provided with top block (4), the diaphragm (5) is arranged between the inner wall of the pneumatic cavity (2) and the top block (4), the inside of the pneumatic cavity (2) is located at the bottom end of the top block (4) is also provided with spring (6), the bottom end of the valve stem (3) is inserted into the inside of the valve body (1) and is fixedly connected with valve core (7), the two sides of the valve body (1) are connected with inflow end (8) and outflow end (9), the inside of the valve body (1) is also provided with valve seat (10), it is characterized by, The filter screen (11) is fixedly installed on the inflow end (8), the inside of the valve body (1) is further rotationally connected with the rotating shaft (12), one end of the rotating shaft (12) penetrates through the inflow end (8) and extends to the outside of the filter screen (11), the end of the rotating shaft (12) is fixedly connected with a plurality of groups of scraping blades (13) which abut against the outer surface of the filter screen (11), the valve rod (3) and the rotating shaft (12) are provided with a rotating driving assembly for driving the rotating shaft (12) to rotate.

2. The anti-clogging pneumatic regulator valve of claim 1, wherein, The driving assembly comprises the gear (14) fixedly sleeved on the surface of the rotating shaft (12) and the toothed plate (15) provided on the surface of the valve rod (3) and engaged with the gear (14).

3. The anti-plugging pneumatic regulator valve of claim 1, wherein, The top end of the valve body (1) is provided with the packing chamber (16), the valve rod (3) extends out of the top of the valve body (1) after penetrating through the packing chamber (16).

4. The anti-plugging pneumatic regulator valve of claim 1, wherein, The valve body (1) and the pneumatic cavity (2) are provided with the stroke scale (17), the valve rod (3) is connected with the pointer (18) which points to the stroke scale (17).

5. The anti-plugging pneumatic regulator valve of claim 1, wherein, The end of the inflow end (8) and the outflow end (9) is provided with the flange ring (19).

6. The anti-plugging pneumatic regulator valve of claim 1, wherein, The outer surface of the valve core (7) is provided with the rubber shell.

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