Valve element sealing structure of pressure reducing valve

Abstract

The utility model provides a valve core sealing structure of a pressure reducing valve, which belongs to the technical field of pressure reducing valves, and comprises a valve core, a groove, a sealing ring and a sealing ring, the gasket is assembled in the groove; the pressing ring is fixedly pressed on the side, away from the groove, of the gasket, the fixing assembly is used for fixing the pressing ring and the gasket in the groove, and the fixing assembly comprises a plurality of first fixing holes which are formed in the axial direction of the gasket in a penetrating mode; the valve element is designed according to the mechanics principle, the on-off function of the valve element is achieved, the gasket is sealed by changing the original mode that the rubber ring is bonded through glue into the mode that the gasket is fastened through the pressing ring, and the problem that when sealing is achieved through glue bonding, the back face of the rubber ring is prone to blow-by, and sealing cannot be achieved is solved. Compared with a rubber ring, the soft nylon gasket is longer in service life, capable of bearing larger impact and pressure, higher in strength and not prone to damage.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure reducing valve technical field, concretely relates to a pressure reducing valve spool sealing structure. BACKGROUND

[0002] On the ship, the generator is the equipment for providing the electric energy source of the ship, including the auxiliary generator and the emergency generator, they are very important equipment on the ship, not only need reliable operation, but also need to start in time. The start of the emergency generator is also the regular inspection item of the state maritime bureau and the maritime international organization, and its importance is self-evident.

[0003] The starting power of the generator prime mover is generally compressed starting air, and the pressure of the starting air of the auxiliary machine is about 5-7bar relative to the starting air of the main engine 22bar-30bar. The equipment required for the change from 30bar to 7bar pressure is a pressure reducing valve. But it is different from the pressure reducing valve of control air, the instantaneous air consumption of control air is small, and the instantaneous air consumption of starting air is large, so the starting air pressure reducing valve needs to have the characteristics of large flow pressure reduction, which is also the key to ensure the timely start of the auxiliary generator and the emergency generator.

[0004] The pressure reducing valve is divided into a valve body and a valve core, wherein the valve core is a key component of the pressure reducing valve, plays the role of on-off air source and sealing, and is also a vulnerable component of the pressure reducing valve. With the lengthening of the use time, the valve core sealing rubber ring of the original pressure reducing valve appears aging, and the elastic plasticity becomes poor. At the same time, the high-pressure compressed air is washed, reciprocally collides with the valve body and is pressed, so that the sealing surface of the sealing rubber ring is damaged, cannot be sealed and pressure reduced, and the pressure reducing valve cannot be used. CONTENT OF THE UTILITY MODEL

[0005] The utility model provides a pressure reducing valve spool sealing structure, utilizes the mechanical principle design, realized the on-off function of valve core, through the way of changing the original adhesive rubber ring with the adhesive to be fastened by the compression ring gasket, to realize the sealing of gasket, overcomes the problem that the back of rubber ring is easy to string air and cannot be sealed when realizing the sealing with the adhesive.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] A pressure reducing valve spool sealing structure, comprising a valve core, further comprising:

[0008] A groove is arranged axially outside the end of the valve core.

[0009] A gasket is assembled in the groove; and

[0010] A compression ring is fixedly compressed on one side of the gasket away from the groove.

[0011] Preferably, the groove, gasket, and pressure ring are all annular.

[0012] Preferably, the pressure reducing valve core sealing structure further includes a fixing component for fixing the pressure ring and gasket in the groove.

[0013] Preferably, the fixing component includes a plurality of first fixing holes that extend through the axial direction of the gasket, a plurality of second fixing holes that are provided on the pressure ring and correspond to the first fixing holes, and fixing bolts that cooperate with the first fixing holes and the second fixing holes; the bottom wall of the groove is provided with a first threaded hole that matches the fixing bolts.

[0014] Preferably, the first fixing holes are evenly distributed along the circumference of the gasket; the second fixing holes are evenly distributed along the circumference of the pressure ring; and the first threaded holes are evenly distributed along the circumference of the groove.

[0015] Preferably, the fixing component further includes a plurality of first limiting holes that are axially connected to the gasket, a plurality of second limiting holes that are provided on the pressure ring and correspond to the first limiting holes, and fixing screws that cooperate with the first limiting holes and the second limiting holes; the bottom wall of the groove is provided with a second threaded hole that matches the fixing screws.

[0016] Preferably, the first limiting holes are evenly distributed along the circumference of the gasket; the second limiting holes are evenly distributed along the circumference of the pressure ring; and the second threaded holes are evenly distributed along the circumference of the groove.

[0017] Preferably, the ratio of the number of the first fixing hole to the number of the first limiting hole is 2:1.

[0018] Preferably, the first limiting hole is located between two adjacent first fixing holes, and the acute angle between the line connecting the axis of the first limiting hole and the axis of the adjacent first fixing hole and the horizontal line is 22.5°.

[0019] Preferably, the first limiting hole includes a first outer semicircle tangent to the inner diameter of the gasket and a first notch extending from the first outer semicircle toward the axis of the gasket; the second limiting hole includes a second outer semicircle tangent to the inner diameter of the pressure ring and a second notch extending from the second outer semicircle toward the axis of the pressure ring.

[0020] As can be seen from the above technical solutions, this utility model has the following beneficial effects:

[0021] 1. In this utility model, the gasket is placed in the groove and pressed onto the valve core body by the pressure ring to form a seal. In this way, compressed air cannot pass between the valve core body and the gasket. The valve core of this utility model is designed using mechanical principles to realize the on / off function of the valve core. By changing the original method of fixing the rubber ring with glue to fixing the gasket with the pressure ring, the gasket is sealed. This overcomes the problem that when the seal is achieved by glue, air can easily seep through the back of the rubber ring, thus failing to seal. In addition, compared with the rubber ring, the soft nylon gasket has a longer service life, can withstand greater impact and pressure, has higher strength, and is not easily damaged.

[0022] 2. In this utility model, the gasket that achieves the sealing is made of nylon, which can be cut, made, and replaced by oneself, and has the advantages of low cost and convenient manufacturing. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0024] Figure 2 for Figure 1 Exploded view of the area after removing the fixing bolts;

[0025] Figure 3 This is a schematic diagram of the valve core structure;

[0026] Figure 4 This is a schematic diagram of the gasket structure;

[0027] Figure 5 This is a schematic diagram of the pressure ring structure.

[0028] In the diagram: 10, valve core; 20, groove; 210, first threaded hole; 220, second threaded hole; 30, gasket; 40, pressure ring; 510, first fixing hole; 520, second fixing hole; 530, fixing bolt; 540, first limiting hole; 541, first outer semicircle; 542, first notch; 550, second limiting hole; 551, second outer semicircle; 552, second notch. Detailed Implementation

[0029] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0030] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions: (Refer to...) Figure 1A pressure reducing valve core sealing structure includes a valve core 10, a groove 20, a gasket 30, and a pressure ring 40. The groove 20 is arranged axially outward along the end of the valve core 10. The gasket 30 is assembled within the groove 20. The pressure ring 40 is fixedly pressed onto the side of the gasket 30 away from the groove 20. Specifically, in this embodiment, the gasket 30 has an outer diameter of 55mm, an inner diameter of 34mm, and a thickness of 2.5mm, and is made of nylon. The pressure ring 40 has an outer diameter of 47mm, an inner diameter of 34mm, and a thickness of 2.5mm. The material is stainless steel. During use, the gasket is placed in the groove and pressed onto the valve core body by the pressure ring to form a seal. In this way, compressed air cannot pass between the valve core body and the gasket. This utility model achieves a gasket seal by changing the original method of fixing the rubber ring with glue to fixing the gasket with the pressure ring. This overcomes the problem that when the seal is achieved by glue, air can easily seep through the back of the rubber ring, thus failing to seal. In addition, compared with the rubber ring, the soft nylon gasket has a longer service life, can withstand greater impact and pressure, has higher strength, and is not easily damaged.

[0031] It should be noted that in this embodiment, the groove 20, the gasket 30, and the pressure ring 40 are all annular. At the same time, compared with the traditional groove size, the groove in this embodiment is expanded by 0.5mm to the outside of the center and by 4.5mm to the inside of the center, so that the radial distance of the entire groove is 11mm.

[0032] Reference Figure 2 As a preferred technical solution in this embodiment, in order to improve the stability of the pressure ring 40 pressing against the side of the gasket 30, the valve core sealing structure of the pressure reducing valve also includes a fixing component for fixing the pressure ring 40 and the gasket 30 in the groove 20.

[0033] Reference Figure 3 Furthermore, the fixing component includes a first fixing hole 510, a second fixing hole 520, and a fixing bolt 530. The number of first fixing holes 510 is several. Specifically, in this embodiment, there are 8 first fixing holes 510, and the diameter of the first fixing hole 510 is 4mm. At the same time, the first fixing hole is axially arranged along the gasket 30. The number of second fixing holes 520 is also several. Several second fixing holes 520 are provided on the pressure ring 40 and correspond to the first fixing holes 510. That is, in this embodiment, there are also 8 second fixing holes 520. The fixing bolt 530 is used in conjunction with the first fixing hole 510 and the second fixing hole 520. Correspondingly, in order to connect the fixing bolt 530 to the valve body, a first threaded hole 210 matching the fixing bolt 530 is provided on the bottom wall of the groove 20.

[0034] Reference Figure 2Furthermore, the first fixing hole 510 is evenly distributed around the gasket 30, the second fixing hole 520 is evenly distributed around the pressure ring 40, and the first threaded hole 210 is evenly distributed around the groove 20. In this way, when assembling the gasket 30, the first fixing hole 510, the second fixing hole 520, and the first threaded hole 210 can form a positional correspondence. Then, the fixing bolt 530 and the first threaded hole 210 are engaged to achieve the fixed connection effect of the gasket, pressure ring, and valve core.

[0035] Reference Figure 2 , Figure 4 In some embodiments, the fixing component further includes a first limiting hole 540, a second limiting hole 550, and a fixing screw. Further, there are several first limiting holes 540, and several first limiting holes 540 are arranged to pass through the axial direction of the gasket 30. Specifically, in this embodiment, there are 4 second limiting holes 540 and several second limiting holes 550. Several second limiting holes 550 are provided on the pressure ring 40, and the second limiting holes 550 correspond to the first limiting holes 540. That is, in this embodiment, there are also 4 second limiting holes. The fixing screw is used in conjunction with the first limiting hole 540 and the second limiting hole 550. At the same time, a second threaded hole 220 matching the fixing screw is provided on the bottom wall of the groove 20.

[0036] Furthermore, the first limiting hole 540 is evenly distributed around the circumference of the gasket 30, the second limiting hole 550 is evenly distributed around the circumference of the pressure ring 40, and the second threaded hole 220 is evenly distributed around the circumference of the groove 20. In this way, when the gasket 30 is assembled, the first limiting hole 540, the second limiting hole 550, and the second threaded hole 220 can form a positional correspondence, and then the gasket can be further fixed by the cooperation of the fixing screw and the second threaded hole 220.

[0037] It should be noted that the ratio of the number of the first fixing hole 510 to the number of the first limiting hole 540 is 2:1. Since the second fixing hole 520 corresponds to the first fixing hole 510 and the second limiting hole 550 corresponds to the first limiting hole 540, the ratio of the number of the second fixing hole 520 to the number of the second limiting hole 550 is also 2:1. Now, taking the positional relationship between the first limiting hole 540 and the first fixing hole 510 as an example, since the ratio of the number of the two is 2:1, the first limiting hole 540 is located between two adjacent first fixing holes 510. At the same time, the acute angle between the line connecting the axis of the first limiting hole 540 and the adjacent first fixing hole 510 and the horizontal line is set to 22.5°. In this way, when the fixing screw cooperates with the first limiting hole and the second limiting hole to further fix the pressure ring and the gasket, it can form the above-mentioned angle with the fixing bolt, so the pressure ring and the gasket can be fixed from multiple angles.

[0038] Reference Figure 4 , Figure 5 In some embodiments, the first limiting hole 540 and the second limiting hole 550 are both composed of two parts. Further, the first limiting hole 540 includes a first outer semicircle 541 and a first notch 542. The first outer semicircle 541 is tangent to the inner diameter of the gasket 30, and the first notch 542 extends from the first outer semicircle 541 toward the axis of the gasket 30. Similarly, the second limiting hole 550 includes a second outer semicircle 551 and a second notch 552. The second outer semicircle 551 is tangent to the inner diameter of the pressure ring 40, and the second notch 552 extends from the second outer semicircle 551 toward the axis of the pressure ring 40. That is, in this embodiment, the first limiting hole 540 and the second limiting hole 550 are both non-closed holes, which facilitates the installation and removal of the fixing screws.

[0039] In use, the pressure ring 40 presses the gasket 30 firmly onto the valve core body, forming a seal. Compressed air cannot pass between the valve core body and the nylon gasket. On the upper part of the nylon gasket, on the outer circumference of the pressure ring 40, a circumference with a diameter of 50mm is the sealing surface between the valve body and the gasket 30. The area enclosed by the upper surface of the gasket 30, with an inner diameter of 50mm and an outer diameter of 55mm, is subjected to the pressure of the air after the valve, directed downwards. On the lower surface of the nylon gasket, the area enclosed by an inner diameter of 47mm and an outer diameter of 55mm is subjected to the pressure of the air after the valve, directed upwards. In this way, the air pressure on the upper and lower surfaces of the nylon gasket is the same, forming an area difference. According to F=P·S, there is a pressure difference between the upper and lower surfaces, directed upwards, which makes the gasket and the valve body press more tightly, achieving a sealing effect.

[0040] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A pressure reducing valve core sealing structure, comprising a valve core (10), characterized in that, Also includes: A groove (20) is provided axially outward along the end of the valve core (10); Gasket (30), said gasket (30) being fitted into a groove (20); and A pressure ring (40) is fixedly pressed onto the side of the gasket (30) away from the groove (20).

2. The pressure reducing valve core sealing structure according to claim 1, characterized in that, The groove (20), gasket (30) and pressure ring (40) are all annular.

3. The pressure reducing valve core sealing structure according to claim 2, characterized in that, The pressure reducing valve core sealing structure also includes a fixing component for fixing the pressure ring (40) and the gasket (30) in the groove (20).

4. The pressure reducing valve core sealing structure according to claim 3, characterized in that, The fixing assembly includes a plurality of first fixing holes (510) that are axially connected to the gasket (30), a plurality of second fixing holes (520) that are provided on the pressure ring (40) and correspond to the first fixing holes (510), and fixing bolts (530) that cooperate with the first fixing holes (510) and the second fixing holes (520); the bottom wall of the groove (20) is provided with a first threaded hole (210) that matches the fixing bolts (530).

5. The pressure reducing valve core sealing structure according to claim 4, characterized in that, The first fixing hole (510) is evenly distributed around the gasket (30); the second fixing hole (520) is evenly distributed around the pressure ring (40); and the first threaded hole (210) is evenly distributed around the groove (20).

6. The pressure reducing valve core sealing structure according to claim 5, characterized in that, The fixing assembly also includes a plurality of first limiting holes (540) that are axially connected to the gasket (30), a plurality of second limiting holes (550) that are provided on the pressure ring (40) and correspond to the first limiting holes (540), and fixing screws that cooperate with the first limiting holes (540) and the second limiting holes (550); the bottom wall of the groove (20) is provided with a second threaded hole (220) that matches the fixing screws.

7. The pressure reducing valve core sealing structure according to claim 6, characterized in that, The first limiting hole (540) is evenly distributed around the gasket (30); the second limiting hole (550) is evenly distributed around the pressure ring (40); the second threaded hole (220) is evenly distributed around the groove (20).

8. The pressure reducing valve core sealing structure according to claim 7, characterized in that, The ratio of the number of the first fixing hole (510) to the number of the first limiting hole (540) is 2:

1.

9. The pressure reducing valve core sealing structure according to claim 8, characterized in that, The first limiting hole (540) is located between two adjacent first fixing holes (510), and the acute angle between the line connecting the axis of the first limiting hole (540) and the axis of the adjacent first fixing hole (510) and the horizontal line is 22.5°.

10. The pressure reducing valve core sealing structure according to claim 9, characterized in that, The first limiting hole (540) includes a first outer semicircle (541) tangent to the inner diameter of the gasket (30) and a first notch (542) extending from the first outer semicircle (541) toward the axis of the gasket (30); the second limiting hole (550) includes a second outer semicircle (551) tangent to the inner diameter of the pressure ring (40) and a second notch (552) extending from the second outer semicircle (551) toward the axis of the pressure ring (40).

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