CN217951311U - Large-traffic compressed air relief pressure valve - Google Patents

Abstract

The utility model relates to a large-traffic compressed air relief pressure valve, including the main valve body, main valve pole, main valve core, main valve membrane group and pilot valve, be equipped with main valve chamber, intake duct, ventiduct, main valve mouth and bleed hole in the main valve body, main valve core fixed mounting is on the main valve pole, and be used for shutoff main valve mouth, be equipped with valve rod center through-hole in the main valve pole, main valve membrane group supports and leans on one end in the main valve pole and can be sealed with valve rod center through-hole port, the other end of main valve pole communicates with the bleed hole, the bleed hole is sealed with the main valve chamber and separates, still includes the relief valve, the relief valve includes the pressure release valve core that is used for compressing tightly the shutoff bleed hole and provides the pressure release elastic construction that compresses tightly elasticity for the pressure release valve core; and an overflow through hole is formed in the peripheral wall of the main valve rod.

Description

Large-traffic compressed air relief pressure valve

Technical Field

The utility model relates to a relief pressure valve technical field, concretely relates to large-traffic compressed air relief pressure valve.

Background

The pressure reducing valve is applied to pressure reduction treatment of a high-pressure air source. However, in the application of mines, ships, metal smelting and the like, the pressure reduction function is required, and the large flow rate characteristic is required. The effective drift diameter and flow of the pressure reducing valve are the necessary conditions for the normal work of pneumatic execution equipment, and the safe and reliable pressure reducing valve provides powerful safety guarantee for safe production.

The application number is 201420762526.9's chinese utility model patent discloses a large-traffic air relief pressure valve provides a guide's type relief pressure valve, and wherein the valve rod adopts the cavity design to be equipped with on the main valve body with the exhaust hole of valve rod cavity hole intercommunication, when the pressure oscillation, the carminative rapidity of excessive pressure overflow promotes the sensitivity of main valve. However, this design has a certain defect, and under certain application conditions, after pneumatic equipment (such as a mining pneumatic drill) suddenly stops working under a large flow, the valve core in the main valve body is difficult to close due to high-pressure airflow impact, and the diaphragm assembly is separated from the valve rod, so that a high-pressure area in the main valve is communicated with an inner hole of the valve rod, and the phenomenon of gas leakage all the time occurs. In addition, in the large-flow air pressure reducing valve and other common pressure reducing valves, the valve core rubberizing sealing gasket is usually manufactured by adopting a rubber coating process, the use is not reliable, and the sealing gasket is easy to fall off under high pressure to cause the failure of the pressure reducing valve. These problems can cause reliability problems in the pressure reducing valve, which can seriously affect the normal use of the pneumatic system and even cause equipment and safety accidents.

SUMMERY OF THE UTILITY MODEL

In view of the above prior art's shortcoming, the to-be-solved technical problem of the utility model lies in providing a large-traffic compressed air relief pressure valve, when the high pressure impact appears in closing suddenly of the way side of giving vent to anger, can guarantee in time stably to close at main valve core, and normal pressure release phenomenon when corresponding sensitivity has avoided the high-pressure draught to strike.

In order to achieve the above object, the utility model provides a large-traffic compressed air relief valve, including the main valve body, main valve pole, main valve core, main valve membrane group and pilot valve, be equipped with main valve chamber, intake duct, gas outlet duct, main valve mouth and bleed hole in the main valve body, main valve core fixed mounting is on main valve pole, and be used for shutoff main valve mouth, be equipped with valve rod center through-hole in the main valve pole, main valve membrane group supports and leans on one end in the main valve pole and can seal valve rod center through-hole port, the other end of main valve pole communicates with the bleed hole, the bleed hole is sealed with the main valve chamber and is separated, still include the relief valve, the relief valve includes the pressure release case that is used for compressing tightly shutoff bleed hole and provides the pressure release elastic construction that compresses tightly elasticity to the pressure release case; and an overflow through hole is formed in the peripheral wall of the main valve rod.

Furthermore, the elastic force of the pressure relief elastic structure in the pressure relief valve is adjustable.

Furthermore, the pressure relief valve further comprises an adjusting bolt in threaded connection with the main valve body, the pressure relief elastic structure comprises a pressure relief spring arranged between the pressure relief valve core and the adjusting bolt, and two ends of the pressure relief spring are respectively connected with or abutted against the pressure relief valve core and the adjusting bolt.

Further, the pressure relief valve further comprises an adjusting bolt screwed on the main valve body, the pressure relief elastic structure comprises a pressure relief spring arranged between the pressure relief valve core and the adjusting bolt, and two ends of the pressure relief spring are respectively connected with or abutted to the pressure relief valve core and the adjusting bolt.

Further, an exhaust through hole is formed in the adjusting bolt.

Further, the main valve element comprises a sealing seat, a sealing ring and a pressing block, the sealing ring is installed in the sealing seat, a first pressing surface is arranged on the sealing seat, the pressing block is fixed on the sealing seat, a second pressing surface is arranged on the pressing block, the first pressing surface and the second pressing surface are respectively pressed on the inner side and the outer side of the sealing ring and fix the sealing ring on the sealing seat in a pressing mode, and a sealing working surface used for being in sealing contact with the main valve body is arranged between the pressing block and the sealing seat.

Furthermore, a positioning groove is formed in the sealing seat, the sealing ring is installed in the positioning groove, and the first pressing surface is located on the side wall of the positioning groove and pressed on the outer side of the sealing ring.

Further, the sealing ring is an O-shaped sealing ring with a circular cross section, the first pressing surface is arc-shaped and is attached to the sealing ring, and the second pressing surface comprises an arc-shaped surface which is attached to and pressed on the upper portion of the inner side of the sealing ring.

Furthermore, the pressing block is provided with a step part extending into the inner hole of the sealing ring, and the peripheral wall of the step part is attached to the inner side of the sealing ring.

As above, the utility model relates to a large-traffic compressed air relief pressure valve has following beneficial effect:

1. through setting up the relief valve, and set up the overflow through-hole on main valve stem, through the overflow through-hole on the main valve stem, can make the pressure at main valve stem both ends keep balance, and unanimous with pressure in the first chamber, when the flue side is closed suddenly, can produce great pressure impact, because the pressure at main valve stem both ends is the same, main valve stem and main valve core can move towards main valve mouth steadily and fast under the main valve spring action, block up main valve mouth, when gas pressure is higher than the setting value in the first chamber, the relief valve can be opened, gas discharges through valve stem center through-hole and discharge hole. The application discloses large-traffic compressed air relief pressure valve, main valve core can be the shutoff of main valve mouth reliable and stable, and the response is quick nimble, has promoted the reliability of relief pressure valve, does not produce the pressure release problem again when normal work. The problem of have the main valve and be difficult to close under the high pressure impact in the current design is solved.

2. Main valve core provides a neotype sealing method, and the sealing washer installation is stable, and the compressive strength is better, has improved main valve core's life and sealing reliability, can satisfy large-traffic high-pressure gas's use needs, has effectively solved in the current design that the sealed pad that valve core adopted traditional metal rubber coating technology to make has the problem that easily drops.

Drawings

Fig. 1 is the internal structure schematic diagram of the large-flow compressed air pressure reducing valve of the present invention.

Fig. 2 is an external schematic view of the large flow compressed air pressure reducing valve of the present invention.

Fig. 3 is a schematic structural diagram of the main valve stem and the main valve core of the present invention.

Fig. 4 is an assembly schematic diagram of the sealing seat and the pressing block of the main valve element of the present invention.

Fig. 5 is a schematic structural view of the sealing seat of the main valve element of the present invention.

Fig. 6 is a schematic diagram of the main valve core and the main valve port of the present invention.

Description of the element reference numerals

1. Main valve body

11. Main valve cavity

111. A first chamber

112. Second chamber

12. Air inlet channel

13. Air outlet channel

14. Bleed hole

15. Main valve port

151. Sealing boss

16. First porthole

17. Second porthole

2. Pilot valve

21. Pilot inlet

22. Pilot outlet

3. Main valve membrane group

33. Module via

4. Main valve stem

41. Valve rod center through hole

42. Overflow through hole

5. Main valve core

51. Sealing seat

511. First pressing surface

512. Positioning groove

52. Pressing block

521. Second pressing surface

522. Step part

53. Sealing ring

531. Sealing working face

6. Pressure relief valve

61. Pressure relief valve core

62. Pressure relief spring

63. Adjusting bolt

631. Exhaust through hole

7. Spring of main valve

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the structure, proportion, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by the people skilled in the art, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial technical significance, and the modification of any structure, the change of the proportion relation or the adjustment of the size should still fall within the scope which can be covered by the technical content disclosed in the present invention without affecting the efficacy which can be generated by the present invention and the purpose which can be achieved by the present invention. In addition, the terms such as "upper", "lower", "left", "right", "middle", etc. used in the present specification are only for convenience of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms should be construed as the scope of the present invention without substantial technical changes.

Referring to fig. 1 to 6, the present invention provides a large flow compressed air pressure reducing valve, including a main valve body 1, a main valve rod 4, a main valve element 5, a main valve membrane group 3 and a pilot valve 2, wherein the main valve body 1 is provided with a main valve cavity 11, an inlet channel 12, an outlet channel 13, a main valve port 15 and a bleed hole 14, the main valve membrane group 3 is movably disposed in the main valve cavity 11, and divides the main valve cavity 11 into a first chamber 111 and a second chamber 112, the main valve membrane group 3 seals and separates the first chamber 111 from the second chamber 112, the outlet channel 13 is communicated with the second chamber 112, the outlet channel 13 is provided with the main valve port 15 between the second chamber 112 of the main valve cavity 11, the main valve element 5 is used for sealing the main valve port 15, and seals and separates the inlet channel 12 from the main valve cavity 11, the main valve element 5 is compressed by a main valve spring 7 at the main valve port 15, the main valve element 5 is fixedly mounted on the main valve rod 4, the main valve rod 4 is provided with a central through hole 41, the main valve rod group 3 abuts against one end of the main valve rod 4 and can seal the central through the port, the bleed hole 14 is kept in communication with the main valve rod, and the bleed hole, and the valve rod can communicate with the bleed hole 14, and the central through the central hole 14. The pilot valve 2 is fixed on the main valve body 1, a pilot inlet 21 on the pilot valve 2 is communicated with the air inlet channel 12 through a first pore channel 16 in the main valve body 1, a pilot outlet 22 is communicated with the first chamber 111 through a second pore channel 17 in the main valve body 1, the pilot valve 2 has the function of partially entering the air in the air inlet channel 12 into the first chamber 111 to push the main valve membrane group 3, the main valve rod 4 is pushed by the main valve membrane group 3, the main valve core 5 is opened, and the pilot valve 2 can adopt the existing structure.

The large-flow compressed air pressure reducing valve of the utility model also comprises a pressure reducing valve 6, wherein the pressure reducing valve 6 comprises a pressure reducing valve core 61 for compressing and plugging the pressure reducing hole 14 and a pressure reducing elastic structure for providing compression elasticity for the pressure reducing valve core 61; the outer peripheral wall of the main valve stem 4 is provided with an overflow through hole 42.

The utility model discloses a large-traffic compressed air relief pressure valve, when normal work, intake duct 12 lets in high-pressure gas, see fig. 1, initial time, main valve core 5 shutoff main valve mouth 15, main valve membrane group 3 support lean on with main valve rod 4 upper end, high-pressure gas enters into first cavity 111 through the gas of pilot valve 2 input certain pressure, form the high pressure in first cavity 111, promote main valve membrane group 3 and remove towards second cavity 112 place side, main valve membrane group 3 promotes main valve rod 4 and main valve core 5 and removes, main valve mouth 15 is opened gradually, high-pressure gas enters into second cavity 112 and exports from gas outlet channel 13, pressure increases gradually in first cavity 111, treat first cavity 111, when second cavity 112 and main valve rod 4 reach balance to the power of main valve membrane group 3, main valve membrane group 3 stops to remove, main valve core 5 stops in the open position, obtain required output pressure value. Meanwhile, the gas in the second chamber 112 enters the valve rod central through hole 41 through the overflow through hole 42 on the main valve rod 4, so that the pressures at the two ends of the main valve rod 4 are kept balanced and are consistent with the pressure in the first chamber 111, the pressure relief valve 6 sets the specified opening pressure, the pressure relief valve 6 is in a blocking state during normal work, and the problem of gas leakage cannot occur. When the gas outlet channel 13 side is suddenly closed, a large pressure impact is generated, the pressure in the first chamber 111 is increased, the main valve diaphragm group 3 moves upwards, meanwhile, because the pressures at two ends of the main valve rod 4 are the same, the main valve rod 4 and the main valve core 5 can stably and quickly move towards the main valve port 15 under the action of the main valve spring 7 to block the main valve port 15, the response is flexible, when the gas pressure in the first chamber 111 is higher than a set value, the pressure release valve 6 is opened, and the gas is discharged through the valve rod central through hole 41 and the discharge hole 14.

The utility model discloses a large-traffic compressed air relief pressure valve, 13 side suddenly close main valve core 5 can be with the 15 shutoff of main valve mouth reliable and stable when producing pressure impact at the ventiduct, and the response is quick nimble, has the problem that the main valve is difficult to close in solving current design, has promoted the reliability of relief pressure valve. The large-flow compressed air reducing valve can be particularly suitable for the use requirement of large-flow high-pressure gas.

In this embodiment, referring to fig. 1, as a preferred design, the elastic force of the pressure relief elastic structure in the pressure relief valve 6 is adjustable, specifically, the pressure relief valve 6 includes an adjusting bolt 63 screwed on the main valve body 1, the pressure relief elastic structure includes a pressure relief spring 62 disposed between the pressure relief valve core 61 and the adjusting bolt 63, two ends of the pressure relief spring 62 are respectively connected or abutted to the pressure relief valve core 61 and the adjusting bolt 63, so as to adjust the compression degree of the pressure relief spring 62 by rotating the adjusting bolt 63, that is, adjust the opening pressure of the pressure relief valve 6, which can meet various requirements and is flexible to use. Further, an exhaust through hole 631 is formed in the adjusting bolt 63, and when the relief valve body 61 is opened, the gas discharged from the relief hole 14 can be smoothly discharged through the exhaust through hole 631.

In the present embodiment, referring to fig. 3, 4 and 5, as a preferred design, the main valve element 5 includes a seal seat 51, a seal ring 53 and a press block 52, the seal seat 51 is fixedly connected with the main valve rod 4, the seal ring 53 is installed in the seal seat 51, the seal seat 51 is provided with a first pressing surface 511, the press block 52 is fixed on the seal seat 51, the press block 52 is provided with a second pressing surface 521, the first pressing surface 511 and the second pressing surface 521 are respectively pressed on the inner side and the outer side of the seal ring 53, the seal ring 53 is pressed and fixed on the seal seat 51, the press block 52 and the seal seat 51 do not cover the seal ring 53 completely, and the seal ring 53 has a seal working surface 531 between the press block 52 and the seal seat 51 for sealing contact with the main valve body 1. Preferably, the seal seat 51 is provided with a positioning groove 512, the seal ring 53 is mounted in the positioning groove 512, a side wall surface of the positioning groove 512 forms a first pressing surface 511 and presses against an outer side portion of the seal ring 53, the pressing block 52 is in an annular state and is sleeved on the main valve stem 4, the pressing block 52 is fixedly mounted in the positioning groove 512, and a second pressing surface 521 thereof presses against an inner side portion of the seal ring 53. The specific shapes of the first pressing surface 511 and the second pressing surface 521 can be determined according to the shape of the sealing ring 53, and can apply downward pressure (toward the bottom of the positioning groove 512) to the sealing ring 53, so that the sealing ring 53 can be positioned and pressed. Of course, in other embodiments, the second pressing surface 521 of the pressing piece 52 may press against the outer side of the sealing ring 53, and the first pressing surface 511 of the sealing seat 51 may press against the inner side of the sealing ring 53.

In this embodiment, referring to fig. 3, 4 and 5, as a preferred design, the sealing ring 53 is an O-ring 53 with a circular cross section, the first pressing surface 511 is arc-shaped and is attached to the sealing ring 53, the second pressing surface 521 includes an arc-shaped surface that is attached to and presses the upper portion of the inner side of the sealing ring 53, referring to fig. 3, the first pressing surface 511 and the second pressing surface 521 are respectively pressed on partial areas on the left and right sides of the upper half portion of the O-ring 53, so that the sealing ring 53 is exposed out of partial areas to form a sealing working surface 531, and the partial areas can be set as needed. Preferably, the sealing working surface 531 does not protrude from the upper surface of the sealing seat 51 or the upper surface of the pressing block 52, so that the positioning and pressing effect on the sealing ring 53 is better. Referring to fig. 6, correspondingly, a circle of sealing protrusion 151, called as a knife edge structure, is disposed around the main valve port 15, and when the main valve port 15 is sealed by the main valve element 5, it can conveniently contact with the sealing working surface 531 of the sealing ring 53 to form a seal. Of course, in other embodiments, the cross-sectional shape of the sealing ring 53 may be rectangular or other shapes, and in this case, the first pressing surface 511 and the second pressing surface 521 need to be pressed against the upper end face side of the edge of the sealing ring 53.

In this embodiment, referring to fig. 3, 4 and 6, the pressing piece 52 has a step 522 extending into the inner hole of the sealing ring 53, the step 522 abuts against the bottom surface of the positioning groove 512 and is fixed by a bolt, and the outer peripheral wall of the step 522 abuts against the inner side of the sealing ring 53 to define the position of the inner hole of the sealing ring 53 and further stabilize the position of the sealing ring 53.

The utility model discloses a large-traffic compressed air relief pressure valve has following beneficial effect:

1. when the air outlet channel 13 side is suddenly closed to generate pressure impact, the main valve core 5 can stably and reliably plug the main valve port 15, the response is quick and flexible, the reliability of the pressure reducing valve is improved, and the pressure relief problem is not generated during normal work. The problem of have the main valve and be difficult to close under the high pressure impact in the existing design is solved.

2. Main valve element 5 provides a neotype sealed mode, and sealing washer 53 installation is stable, and compressive strength is better, has improved main valve element 5's life and sealing reliability, can satisfy large-traffic high-pressure gas's use needs, has effectively solved among the current design that the valve element adopts the sealed pad of traditional metal rubber coating technology preparation to have the problem that easily drops.

To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention shall be covered by the claims of the present invention.

Claims (8)

1. The utility model provides a large-traffic compressed air relief pressure valve, includes the main valve body (1), main valve pole (4), main valve core (5), main valve membrane group (3) and pilot valve (2), be equipped with main valve chamber (11), intake duct (12), ventiduct (13), main valve mouth (15) and bleed hole (14) in the main valve body (1), main valve core (5) fixed mounting is on main valve pole (4) and is used for shutoff main valve mouth (15), be equipped with valve rod center through-hole (41) in main valve pole (4), main valve membrane group (3) support lean on in main valve pole (4) one end and can be sealed with valve rod center through-hole (41) port, the other end and the bleed hole (14) of main valve pole (4) communicate, bleed hole (14) and main valve chamber (11) are sealed the isolated, its characterized in that: the pressure relief valve (6) comprises a pressure relief valve core (61) for pressing and blocking the pressure relief hole (14) and a pressure relief elastic structure for providing pressing elastic force for the pressure relief valve core (61); an overflow through hole (42) is formed in the peripheral wall of the main valve rod (4).

2. A high flow compressed air pressure reducing valve according to claim 1, characterized in that: the elasticity of the pressure relief elastic structure in the pressure relief valve (6) is adjustable.

3. A high flow compressed air pressure reducing valve according to claim 2, characterized in that: the pressure release valve (6) further comprises an adjusting bolt (63) which is connected to the main valve body (1) in a threaded mode, the pressure release elastic structure comprises a pressure release spring (62) which is arranged between the pressure release valve core (61) and the adjusting bolt (63), and two ends of the pressure release spring (62) are connected with or abutted to the pressure release valve core (61) and the adjusting bolt (63) respectively.

4. A high flow compressed air pressure reducing valve according to claim 3, characterized in that: an exhaust through hole (631) is formed in the adjusting bolt (63).

5. A high flow compressed air pressure reducing valve according to claim 1, characterized in that: main valve core (5) are including seal receptacle (51), sealing washer (53) and briquetting (52), install in seal receptacle (51) sealing washer (53), be equipped with first pressing surface (511) on seal receptacle (51), briquetting (52) are fixed in seal receptacle (51), and are equipped with second pressing surface (521) on briquetting (52), first pressing surface (511) and second pressing surface (521) compress tightly respectively in the inside and outside both sides of sealing washer (53) to compress tightly sealing washer (53) and fix on seal receptacle (51), sealing washer (53) have between briquetting (52) and seal receptacle (51) and are used for sealing face (531) with main valve body (1) sealing contact.

6. A high flow compressed air pressure reducing valve according to claim 5, characterized in that: the sealing device is characterized in that a positioning groove is formed in the sealing seat (51), the sealing ring (53) is installed in the positioning groove, and the first pressing surface (511) is located on the side wall of the positioning groove (512) and pressed on the outer side of the sealing ring (53).

7. A high flow compressed air pressure reducing valve according to claim 5 or 6, characterized in that: the sealing ring (53) is an O-shaped sealing ring with a circular section, the first pressing surface (511) is arc-shaped and is attached to the sealing ring (53), and the second pressing surface (521) comprises an arc-shaped surface attached to and pressed on the upper portion of the inner side of the sealing ring (53).

8. A high flow compressed air pressure reducing valve according to claim 5, characterized in that: the pressing block (52) is provided with a step part (522) extending into an inner hole of the sealing ring (53), and the peripheral wall of the step part (522) is attached to the inner side of the sealing ring (53).

Images