CN109027345B - A self-cleaning dust-proof safety valve - Google Patents

Abstract

The invention discloses a self-cleaning dust-proof safety valve, comprising a valve body, a valve cover, a condom, a precision filter screen, a self-cleaning impeller, a coarse filter screen, an upper and lower movable push rod, a measuring spring, an adjusting screw, an adjusting nut and a Safety spring; the valve body is provided with an air pressure port and a pressure relief port. The air pressure port is equipped with a coarse filter screen, a self-cleaning impeller, a dense filter screen and a condom in sequence. Brush to clean the impurities on the filter screen; the adjusting screw passes through the upper end of the bonnet and is threadedly connected to the adjusting nut, the adjusting screw and the inner two sides of the bonnet are equipped with safety springs, and there are measuring springs between the adjusting screw and the upper and lower movable push rods, which are protected by the measuring springs. At the same time as the safety valve, it is connected with the pointer and passes through the slot on the valve body to indicate the scale on both sides of the slot, which corresponds to different internal pressures and plays the role of measuring the internal pressure. The invention has a compact structure, can automatically clean the internal impurities, can measure the internal pressure, is protected by double springs, and is safe and reliable.

Description

A self-cleaning dust-proof safety valve

technical field

The invention relates to the technical field of safety valves, in particular to a self-cleaning dust-proof safety valve.

Background technique

my country is one of the major countries in the production of cement. The best way of transportation is to use bulk cement tankers and bulk cement tankers. It not only ensures the quality of cement, but also helps the environment not be polluted by cement dust. The dustproof device and reliability design of the safety valve of the cement tank are the key issues to be solved urgently in the research of the cement tank. The design of the safety valve of the cement tank is related to the safety of the entire tank. At present, only the filter screen is used to prevent the safety valve from being blocked. However, after prolonged use, the safety valve filter may be blocked, and a single spring may fail, which will bring danger to the normal operation of the safety valve and endanger the personal safety of the tank and the operator.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a self-cleaning dust-proof safety valve, the purpose is to make the safety valve have a self-cleaning function, prevent clogging, use double springs to increase its reliability, and can measure the internal pressure of the tank.

In order to achieve the above purpose, the technical solution adopted in the present invention is: a self-cleaning dust-proof safety valve, comprising a valve body, a valve cover fixedly connected with the valve body, a condom, a fine and precise filter screen, a coarse filter screen, and a cleaning Type impeller, upper and lower movable push rod, measuring spring, adjusting screw, adjusting nut and safety spring;

The valve body is provided with an air pressure port and a pressure relief port, and the air pressure port is sequentially installed with a coarse filter screen, a cleaning impeller, a precision filter screen and a condom from the inside to the outside;

The adjusting screw thread is connected with the adjusting nut through the upper end of the valve cover. The inside of the adjusting screw is hollow. The upper and lower movable push rods include a piston rod and a piston. The piston rod is installed in the adjusting screw and can slide relative to the adjusting screw. The piston is connected to the valve. The valve cavity inside the body is matched and arranged at the pressure relief port;

The measuring spring is sleeved on the piston rod and installed between the piston and the adjusting screw.

Further, the cleaning impeller includes blades and an outer ring hub, the blades are fixed in the outer ring hub, the valve body is provided with a ball groove with a diameter larger than the air pressure port, and the outer ring hub is also provided with a ball groove, so Balls are arranged between the outer ring hub and the ball groove of the valve body.

Further, both sides of the blades of the cleaning impeller are respectively provided with brushes that can clean dust and impurities on the fine filter and the coarse filter.

Further, the condom is in an interference fit with the valve body.

Compared with the prior art, the beneficial effects of the present invention are:

1. Coarse filter screen and precision filter screen are installed in the air pressure port. The installation of two layers of filter screen can ensure that it will not deform and fall off under the action of large pressure.

2. The invention has strong safety, the clean impeller can rotate in the valve body under the action of air flow, the brush on the blade can clean the coarse filter screen and the fine filter screen, can realize the automatic cleaning of the safety valve and prevent clogging.

3. The present invention reduces the dust entering the air through the self-cleaning filter screen and achieves the purpose of environmental protection.

4. The present invention is protected by double springs. When the measuring spring fails, the safety spring can protect the safety valve, which greatly increases the reliability of the safety valve.

5. The measuring spring of the present invention is provided with a pointer, and the two sides of the slot are provided with pressure indicating scales, which realizes the real-time readability of the pressure data inside the tank.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the schematic diagram of the installation chassis of the present invention;

Among them, 1- valve body, 2- valve cover, 3- condom, 4- precision filter screen, 5- coarse filter screen, 6- clean impeller, 601- blade, 602- outer ring hub, 7- upper and lower movable push rod , 8-measurement spring, 9-adjustment screw, 10-adjustment nut, 11-safety spring, 12-air pressure port, 13-pressure relief port, 14-pointer, 15-slot hole, 16-ball.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

The present invention is a self-cleaning dust-proof safety valve, comprising a valve body 1, a valve cover 2 fixedly connected to the valve body, a condom 3, a precision filter screen 4, a coarse filter screen 5, a cleaning impeller 6, and an upper and lower movable push rod. 7. Measuring spring 8, adjusting screw 9, adjusting nut 10 and safety spring 11;

The valve body 1 is provided with an air pressure port 12 and a pressure relief port 13, and the air pressure port 12 is sequentially installed with a coarse filter screen 5, a cleaning impeller 6, a precision filter screen 4 and a condom 3 from the inside to the outside;

The adjusting screw 9 passes through the upper end of the valve cover 2 and is threadedly connected with the adjusting nut 10. The inside of the adjusting screw 9 is hollow. The upper and lower movable push rods 7 include a piston rod and a piston. The piston rod is installed in the adjusting screw 9 and can be adjusted relative to the screw 9. sliding, the piston cooperates with the valve cavity inside the valve body 1 and is arranged at the pressure relief port 13;

The measuring spring 8 is sleeved on the piston rod and installed between the piston and the adjusting screw 9 .

A pointer 14 is installed on the measuring spring, the side of the valve body 1 is provided with an axial slot 15 through which the pointer 14 can pass, and a pressure indicating scale is provided on both sides of the slot 15 . The safety springs 11 are respectively installed between the adjustment screw 9 and the valve cover 2 at positions on both sides of the adjustment screw 9 .

As shown in FIG. 2 , the cleaning impeller 6 includes blades 601 and an outer ring hub 602. The blades 601 are fixed in the outer ring hub 602. The valve body 1 is provided with a ball groove with a diameter larger than that of the air pressure port 12. A ball groove is also provided on the outer side of the ring hub 602 , and a ball 16 is provided between the outer ring hub 602 and the ball groove of the valve body 1 .

In the above embodiment, the condom 3 is in interference fit with the valve body 1 to fix the internal device; the blades 601 of the cleaning impeller 6 are respectively provided with dust and impurities on both sides of the fine filter 4 and the coarse filter 5 which can be cleaned. The cleaning impeller 6 can rotate in the valve body 1 under the action of the air flow, and the brush on the blade 601 can clean the coarse filter screen and the precision filter screen, which can realize the automatic cleaning of the safety valve and prevent clogging.

The adjusting screw 9 passes through the upper end of the valve cover 2 and is threadedly connected with the adjusting nut 10. The adjusting nut 10 can be rotated to adjust the distance between the adjusting screw 9 and the valve cover 2 to adjust the preload of the safety spring 11 to adjust the pressure relief pressure. When the internal pressure of the tank body is small, the upper and lower movable push rods 7 block the pressure relief port 13 to prevent the air pressure from leaking out; a measuring spring 8 is installed between the upper and lower movable push rods 7 and the adjusting screw 9. When the internal pressure of the tank body is large, The airflow pushes the upper and lower movable push rods 7 to move upwards, gradually leaking out the pressure relief port 13 for pressure relief; the greater the internal pressure of the tank, the greater the upward displacement of the piston, so that the larger the diameter of the leaked pressure relief port 13, the greater the pressure relief. The faster the pressure, the measuring spring 9 has a pointer, the side of the valve body 1 is provided with an axial slot 15 through which the pointer 14 can pass, and the pressure indicating scale is provided on both sides of the slot 15. While the valve protects, the internal pressure of the tank can be displayed in real time, and the pressure indication scale on both sides of the slot hole is calibrated during production. When the measuring spring 8 fails and does not compress, when the pressure in the tank is too large, it will push the upper and lower movable push rods 7, the adjusting screw 9 and the adjusting nut 10 to move upward together. At this time, the safety spring 11 plays a protective role.

The invention has a self-cleaning function, prevents clogging, uses double springs to increase its reliability, can measure the internal pressure of the tank, is simple and convenient to manufacture, and effectively avoids potential safety hazards caused by overpressure in the tank.

The specific embodiments of the present invention have been described above in detail, but they are only one of the embodiments, and the present invention is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to the present invention are also within the scope of the present invention. Therefore, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be included within the scope of the present invention.

Claims (5)

1. A self-cleaning dust-proof safety valve, comprising a valve body (1), a valve cover (2) fixedly connected to the valve body, a condom (3), a precision filter screen (4), and a coarse filter screen (5), It is characterized in that: also comprise a clean impeller (6), an upper and lower movable push rod (7), a measuring spring (8), an adjustment screw (9), an adjustment nut (10) and a safety spring (11); The valve body (1) is provided with an air pressure port (12) and a pressure relief port (13). (4) and condoms (3); The adjusting screw (9) is threadedly connected to the adjusting nut (10) through the upper end of the valve cover (2). The rod is installed in the adjustment screw (9) and can slide relative to the adjustment screw (9). The safety springs (11) are respectively installed between the adjustment screw (9) and the valve cover (2) on both sides of the adjustment screw (9). position, the piston is arranged at the pressure relief port (13) in cooperation with the valve cavity inside the valve body (1); The measuring spring (8) is sleeved on the piston rod and installed between the piston and the adjusting screw (9). 2. A self-cleaning dust-proof safety valve according to claim 1, wherein a pointer (14) is installed on the measuring spring, and a pointer (14) is provided on the side of the valve body (1). Through the axial slot hole (15), pressure indicating scales are provided on both sides of the slot hole (15). 3. A self-cleaning dust-proof safety valve according to claim 1, characterized in that: the cleaning impeller (6) comprises a blade (601) and an outer ring hub (602), and the blade (601) It is fixed in the outer ring hub (602), the valve body (1) is provided with a ball groove with a diameter larger than the air pressure port (12), the outer ring hub (602) is also provided with a ball groove, and the outer ring hub (602) is also provided with a ball groove. A ball (16) is provided between (602) and the ball groove of the valve body (1). 4. A self-cleaning dust-proof safety valve according to claim 1, characterized in that: the vanes (601) of the cleaning impeller (6) are provided with cleanable precision filters (4) and Brush for dust and impurities on the coarse filter (5). 5 . The self-cleaning dust-proof safety valve according to claim 1 , wherein the condom ( 3 ) is in an interference fit with the valve body ( 1 ). 6 .

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