A cylinder end face sealing structure of a pressure increasing valve

Abstract

The utility model belongs to valve body sealing technical field, specifically is a kind of cylinder barrel end face sealing structure of pressure increasing valve, including cylinder body and the end cap assembled in the both ends of cylinder body, the cooperation surface between the end of cylinder body and end cap is provided with first sealing element, boss and the inner wall between cylinder body can be provided with second sealing element or third sealing element, second sealing element includes the annular groove of being opened in the peripheral side of boss, and the second sealing ring of being assembled in annular groove, the edge of annular groove near cylinder body interior is opened with arc bevel, third sealing element includes the first positioning groove of being opened in the peripheral side of annular groove, third sealing ring with convex ring, the second positioning groove of being opened in the inner wall of cylinder body, fourth sealing ring with convex ring, the side opposite of third sealing ring and fourth sealing ring respectively is equipped with the abutting bevel of being matched and unequal diameter, the end edge of the assembly surface of cylinder body and end cap is opened with bevel, the utility model improves sealing redundancy and sealing performance, satisfies the demand of sealing reliability of pressure increasing valve under high pressure working condition.

Description

Technical Field

[0001] This utility model belongs to the field of valve body sealing technology, specifically a cylinder end face sealing structure for a booster valve. Background Technology

[0002] A booster valve is a fluid control device used to increase the pressure of gas or liquid. It is widely used in industrial hydraulic systems, automotive braking systems, pneumatic equipment, and other applications. It can boost low-pressure fluids to the high-pressure values ​​required by the equipment, meet the pressure requirements under different working conditions, and ensure the stable operation of related systems.

[0003] The existing booster valve is mainly composed of the following parts: valve body, piston, seal, inlet and outlet. Working principle: low pressure fluid enters the valve body from the inlet, pushing the piston to move. According to Pascal's principle, the small end will output a higher pressure fluid.

[0004] The existing booster valves have the following drawbacks: they are prone to leakage under high pressure, have a small sealing surface area and simple structure, limited contact pressure, poor sealing surface tightness, and are difficult to form a stable sealing barrier, thus failing to meet the sealing reliability requirements of booster valves under high pressure conditions. Therefore, a cylinder end face sealing structure for booster valves is proposed to address the above problems. Utility Model Content

[0005] To overcome the shortcomings of existing booster valves, a cylinder end face sealing structure for booster valves is proposed.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The cylinder end face sealing structure of the booster valve of this utility model includes a cylinder body and end caps assembled at both ends of the cylinder body. The end of the cylinder body and the mating surface of the end cap are sealed by a first sealing element. A boss is provided on the opposite side of the end cap and the cylinder body. The boss extends into the inside of the cylinder body. The boss and the inner wall of the cylinder body are sealed by a second sealing element.

[0007] Preferably, the first sealing element includes an assembly groove formed at the end of the cylinder body, and a first sealing ring assembled in the assembly groove, wherein the first sealing ring is deformed under pressure after the cylinder body and the end cover are assembled.

[0008] Preferably, the second seal includes an annular groove formed on the periphery of the boss, and a second sealing ring fitted in the annular groove, wherein the second sealing ring is deformed under pressure after the cylinder body and the end cover are assembled.

[0009] Preferably, the annular groove has an arc-shaped bevel near the inner edge of the cylinder body. When the cylinder body and the end cover are assembled, the first sealing ring is deformed under pressure and fits into the arc-shaped bevel.

[0010] Preferably, the cylinder body has a beveled opening at the end edge of the mounting surface with the end cap.

[0011] Preferably, the device includes a third sealing element, which includes a first positioning groove formed on the periphery of the annular groove and a third sealing ring assembled on the annular groove. The third sealing ring is provided with a first convex ring inserted into the first positioning groove. The device also includes a second positioning groove formed on the inner wall of the cylinder body and a fourth sealing ring disposed opposite to the third sealing ring. The fourth sealing ring is provided with a second convex ring inserted into the second positioning groove. After the cylinder body and the end cover are assembled, the third sealing ring and the fourth sealing ring abut against each other and are both subjected to pressure deformation.

[0012] Preferably, the third sealing ring and the fourth sealing ring are respectively provided with a first abutting bevel and a second abutting bevel on opposite sides.

[0013] Preferably, when the third sealing ring and the fourth sealing ring abut against each other, the first abutting bevel abuts against the second abutting bevel, and the diameter corresponding to the first abutting bevel is not equal to the diameter corresponding to the second abutting bevel. The diameter difference causes the first abutting bevel and the second abutting bevel to make a squeezing contact.

[0014] Preferably, a retaining ring that abuts against the fourth sealing ring is provided on the inner wall of the cylinder body on the side of the cylinder body near the fourth sealing ring.

[0015] The beneficial effects of this utility model are:

[0016] This utility model provides a cylinder end face sealing structure for a booster valve. It adopts a double independent sealing structure to increase sealing redundancy, which can effectively deal with the risk of fluid leakage under high pressure conditions. Furthermore, the third sealing element, through the double sealing ring cooperation structure and the active extrusion structure of the bevel with unequal diameter, not only increases the sealing surface area and complexity by cooperating with the convex ring and the positioning groove, but also generates greater contact pressure through the difference in bevel diameter, making the sealing surface fit more tightly and significantly enhancing the sealing performance. Overall, it meets the stringent requirements for sealing reliability of the booster valve under high pressure conditions. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a structural diagram of Embodiment 1;

[0019] Figure 2 yes Figure 1 Enlarged view of the structure at point A in the middle;

[0020] Figure 3 This is a structural diagram of Embodiment 2;

[0021] Figure 4 yes Figure 3 Enlarged view of the structure at point B;

[0022] Figure 5 This is a structural breakdown diagram of Embodiment 2;

[0023] Legend:

[0024] 1. Cylinder body; 2. End cap; 3. First seal; 301. Assembly groove; 302. First sealing ring; 4. Boss; 5. Second seal; 501. Ring groove; 502. Second sealing ring; 6. Arc-shaped bevel; 7. Inclined bevel; 8. Third seal; 801. First positioning groove; 802. Third sealing ring; 803. First convex ring; 804. Second positioning groove; 805. Fourth sealing ring; 806. Second convex ring; 9. First abutment bevel; 10. Second abutment bevel; 11. Retaining ring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Specific implementation examples are given below.

[0027] Example 1:

[0028] Please see Figures 1-2 The present invention discloses a cylinder end face sealing structure for a booster valve, comprising a cylinder body 1 and end caps 2 mounted at both ends of the cylinder body 1. The mating surfaces of the cylinder body 1 and the end caps 2 are sealed by a first sealing element 3. The end caps 2 and the cylinder body 1 are provided with a boss 4 on their opposite sides. The boss 4 extends into the cylinder body 1. The boss 4 and the inner wall of the cylinder body 1 are sealed by a second sealing element 5.

[0029] The first sealing element 3 includes an assembly groove 301 formed at the end of the cylinder body 1, and a first sealing ring 302 assembled in the assembly groove 301. After the cylinder body 1 and the end cover 2 are assembled, the first sealing ring 302 is deformed under pressure. The second sealing element 5 includes an annular groove 501 formed on the periphery of the boss 4, and a second sealing ring 502 assembled in the annular groove 501. After the cylinder body 1 and the end cover 2 are assembled, the second sealing ring 502 is deformed under pressure. During operation, when the end cover 2 is assembled with the cylinder body 1, the end face of the end cover 2 presses against the first sealing ring 302 in the assembly groove 301 at the end of the cylinder body 1, causing it to undergo elastic deformation. The deformed first sealing ring 302 tightly fits the inner wall of the assembly groove 301 and the end cover 2. The end face is filled with microscopic gaps between the two; at the same time, the boss 4 of the end cover 2 is inserted into the cylinder body 1, and the inner wall of the cylinder body 1 squeezes the second sealing ring 502 in the annular groove 501 of the boss 4. After the second sealing ring 502 elastically deforms, it fits the inner wall of the annular groove 501 and the inner wall of the cylinder body 1 to form a second sealing barrier. The two sealing structures work together to prevent the fluid inside the booster valve from leaking from the mating surface of the cylinder body 1 and the end cover 2. Finally, the cylinder body 1 and the end cover 2 are fixed by fixing bolts. The double independent sealing structure increases the sealing redundancy compared with the single sealing, which can effectively deal with the risk of fluid leakage under high pressure conditions inside the booster valve. It does not require complex precision machining, reducing the difficulty and cost of structural processing.

[0030] Furthermore, the annular groove 501 has an arc-shaped bevel 6 near the inner edge of the cylinder body 1. When the cylinder body 1 is assembled with the end cover 2, the second sealing ring 502 is deformed under pressure and fits against the arc-shaped bevel 6. During operation, when the end cover 2 is assembled with the cylinder body 1, the boss 4 of the end cover 2 is inserted into the cylinder body 1. The inner wall of the cylinder body 1 exerts radial pressure on the second sealing ring 502 in the annular groove 501 of the boss 4, forcing the second sealing ring 502 to undergo elastic deformation. At this time, the arc-shaped bevel 6 near the inner edge of the annular groove 501 provides a smooth guiding surface for the deformation of the second sealing ring 502, so that the sealing ring faces the deformed part inside the cylinder body 1. The second sealing ring 502 naturally conforms to the curved surface of the arc-shaped bevel 6, rather than making hard contact with the right-angle edge of the annular groove 501. After conforming, the second sealing ring 502 and the arc-shaped bevel 6 form a continuous and gapless sealing contact surface, which not only fills the potential gap between the edge of the annular groove 501 and the sealing ring, but also disperses the local stress of the sealing ring through the arc structure. At the same time, it has a positioning function for the second sealing ring 502. The smooth curved surface of the arc-shaped bevel 6 can effectively disperse the local stress when the second sealing ring 502 deforms, avoiding aging and cracking of the sealing ring at the right-angle edge of the annular groove 501 due to long-term stress concentration, and significantly extending the service life of the seal.

[0031] Furthermore, a bevel 7 is provided on the end edge of the mounting surface of the cylinder body 1 and the end cover 2. During operation, when the end cover 2 is assembled with the cylinder body 1, the bevel 7 at the end of the mounting surface of the cylinder body 1 forms a smooth guide surface. The mounting end of the end cover 2 can be gradually aligned with the mounting position of the cylinder body 1 along the inclined surface of the bevel 7. After assembly, the bevel 7 of the cylinder body 1 and the edge of the end cover 2 maintain a non-sharp contact transition state. Even if the pressure booster valve generates a small relative displacement due to vibration during operation, the two will not cause additional wear or collision damage due to sharp edge contact. The non-sharp edge matching method can reduce the wear of the cylinder body 1 and the edge of the end cover 2 caused by vibration during the operation of the pressure booster valve, prevent internal leakage of the cylinder body 1, and extend the overall service life of the cylinder body 1 and the end cover 2.

[0032] Example 2: Please refer to Figures 3-5 :

[0033] Based on Embodiment 1, the second sealing element 5 is adjusted to a third sealing element 8. Further, the third sealing element 8 includes a first positioning groove 801 formed around the annular groove 501, and a third sealing ring 802 fitted onto the annular groove 501. The third sealing ring 802 has a first protruding ring 803 inserted into the first positioning groove 801. It also includes a second positioning groove 804 formed on the inner wall of the cylinder body 1, and a fourth sealing ring 805 opposite to the third sealing ring 802. The fourth sealing ring 805 has a second protruding ring 806 inserted into the second positioning groove 804. After the cylinder body 1 and end cover 2 are assembled, the third sealing ring 802 and the fourth sealing ring 805 abut against each other and are both subjected to pressure deformation. On opposite sides of the third sealing ring 802 and the fourth sealing ring 805, there are respectively a first abutting bevel 9 and a second abutting bevel 10 that cooperate with each other. When the third sealing ring 802 and the fourth sealing ring 805 abut, the first abutting bevel 9 abuts with the second abutting bevel 10, and the diameter of the first abutting bevel 9 is not equal to the diameter of the second abutting bevel 10. The diameter difference causes the first abutting bevel 9 and the second abutting bevel 10 to make a squeezing contact. The inner wall of the cylinder 1 is provided with a retaining ring 11 that abuts with the fourth sealing ring 805 on the side of the cylinder 1 near the inside of the cylinder 1. During operation, when the end cover 2 is assembled with the cylinder 1, the first convex ring 803 of the third sealing ring 802 is first embedded into the boss. The first positioning groove 801 of the fourth sealing ring 805 and the second convex ring 806 of the fourth sealing ring 805 are embedded in the second positioning groove 804 of the inner wall of the cylinder body 1, completing the fixed positioning of the double sealing rings. As the end cover 2 is gradually assembled into place, the boss 4 drives the third sealing ring 802 to move into the cylinder body 1. During the movement, the first abutting bevel 9 of the third sealing ring 802 abuts against the second abutting bevel 10 of the fourth sealing ring 805. Because the diameters of the first abutting bevel 9 and the second abutting bevel 10 are different, the inclined surfaces of the two bevels are squeezed when they abut, forcing the third sealing ring 802 and the fourth sealing ring 805 to be squeezed and deformed. At the same time, the retaining ring 11 prevents the fourth sealing ring 805 from moving into the cylinder body 1, ensuring that the two sealing rings continue to be squeezed. Finally, the third sealing ring 802 fits against the boss 4. The outer wall and the first positioning groove 801, the fourth sealing ring 805 fit against the inner wall of the cylinder 1, the second positioning groove 804 and the retaining ring 11, the extrusion contact of the two bevels form an additional sealing surface, which together achieves the sealing between the boss 4 and the inner wall of the cylinder 1. At the same time, the first convex ring 803 and the second convex ring 806 are integrally formed with the third sealing ring 802 and the fourth sealing ring 805 respectively. Therefore, when the first convex ring 803 and the second convex ring 806 are inserted into the first positioning groove 801 and the second positioning groove 804 respectively, a sealing structure will also be formed, increasing the complexity and area of ​​the sealing surface, and further improving the sealing performance. The contact bevels of the third sealing ring 802 and the fourth sealing ring 805 generate active extrusion due to the diameter difference, resulting in greater contact pressure and tighter sealing surface fit, and significantly enhanced sealing performance.

[0034] The main innovation of this utility model lies in the cylinder end face sealing structure of the booster valve. Besides the cylinder body and end cover, the booster valve also includes conventional components such as a piston, valve core, inlet, outlet, check valve, return oil assembly, and pressure regulating components. Its working principle is also conventional in this field. The specific design details and implementation details of the conventional structure and working principle of the booster valve are not the innovation of this utility model, as they are well-known to those skilled in the art and will not be elaborated upon here.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A cylinder end face sealing structure for a booster valve, comprising a cylinder body (1) and end caps (2) assembled at both ends of the cylinder body (1), characterized in that: The end of the cylinder (1) is sealed to the mating surface of the end cap (2) by a first sealing element (3). The end cap (2) and the cylinder (1) are provided with a boss (4) on opposite sides. The boss (4) extends into the cylinder (1). The boss (4) and the inner wall of the cylinder (1) are sealed by a second sealing element (5).

2. The cylinder end face sealing structure of the booster valve according to claim 1, characterized in that: The first sealing element (3) includes an assembly groove (301) opened at the end of the cylinder (1) and a first sealing ring (302) assembled in the assembly groove (301). After the cylinder (1) and the end cover (2) are assembled, the first sealing ring (302) is deformed by pressure.

3. The cylinder end face sealing structure of the booster valve according to claim 1, characterized in that: The second seal (5) includes an annular groove (501) formed on the periphery of the boss (4) and a second sealing ring (502) assembled in the annular groove (501). After the cylinder body (1) and the end cover (2) are assembled, the second sealing ring (502) is deformed by pressure.

4. The cylinder end face sealing structure of the booster valve according to claim 3, characterized in that: The annular groove (501) has an arc-shaped bevel (6) at the edge near the inside of the cylinder body (1). When the cylinder body (1) and the end cover (2) are assembled, the first sealing ring (302) is deformed under pressure and fits into the arc-shaped bevel (6).

5. The cylinder end face sealing structure of a booster valve according to claim 1, characterized in that: A bevel (7) is provided on the end edge of the mounting surface of the cylinder body (1) and the end cover (2).

6. The cylinder end face sealing structure of the booster valve according to claim 1, characterized in that: The system includes a third sealing element (8), which includes a first positioning groove (801) formed on the periphery of the annular groove (501) and a third sealing ring (802) assembled on the annular groove (501). The third sealing ring (802) is provided with a first convex ring (803) inserted into the first positioning groove (801). The system also includes a second positioning groove (804) formed on the inner wall of the cylinder body (1) and a fourth sealing ring (805) disposed opposite to the third sealing ring (802). The fourth sealing ring (805) is provided with a second convex ring (806) inserted into the second positioning groove (804). After the cylinder body (1) and the end cover (2) are assembled, the third sealing ring (802) and the fourth sealing ring (805) abut against each other and are both subjected to pressure deformation.

7. The cylinder end face sealing structure of a booster valve according to claim 6, characterized in that: The third sealing ring (802) and the fourth sealing ring (805) are respectively provided with a first abutting bevel (9) and a second abutting bevel (10) on their opposite sides.

8. The cylinder end face sealing structure of a booster valve according to claim 7, characterized in that: When the third sealing ring (802) abuts against the fourth sealing ring (805), the first abutting bevel (9) abuts against the second abutting bevel (10), and the diameter corresponding to the first abutting bevel (9) is not equal to the diameter corresponding to the second abutting bevel (10). The diameter difference causes the first abutting bevel (9) and the second abutting bevel (10) to make a squeezing contact.

9. The cylinder end face sealing structure of a booster valve according to claim 6, characterized in that: The inner wall of the cylinder (1) is provided with a retaining ring (11) that abuts against the fourth sealing ring (805) on the side of the cylinder (1) near the inside of the cylinder (1).

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