Ultrahigh-pressure sealing structure of isostatic pressing cylinder body

Abstract

The utility model belongs to the technical field of explosive column pressing production, and particularly relates to an ultrahigh-pressure sealing structure of an isostatic pressing cylinder body. According to the technical scheme, the ultrahigh-pressure sealing structure of the isostatic pressing cylinder body comprises a high-pressure cylinder body, a high-pressure cavity is formed in the high-pressure cylinder body, high-pressure end sockets are connected to the two ends of the high-pressure cylinder body correspondingly, and sealing washers, ultrahigh-pressure triangular sealing ring sets and Y-shaped sealing rings are sequentially arranged between the high-pressure end sockets and the inner wall of the high-pressure cylinder body; the Y-shaped sealing ring is located on the side, close to the high-pressure cavity, of the ultrahigh-pressure triangular sealing The utility model provides an ultrahigh-pressure sealing structure of an isostatic pressing cylinder body.

Description

Technical Field

[0001] The utility model belongs to the technical field of explosive powder column pressing production, in particular to an isostatic pressure cylinder ultra-high pressure sealing structure. Background Art

[0002] Due to the unique nature of the raw materials, traditional explosives are pressed using die-cut dies, resulting in low production efficiency and limited production of single shots at a time. The die is bulky and heavy due to the application of force from both ends. Furthermore, the coaxiality and parallelism of the upper and lower dies can lead to uneven pressing forces and unstable product quality. The isostatic pressing process for explosives allows for the production of multiple shots at a time, while also providing balanced pressing forces, stable quality, and a lightweight die.

[0003] However, when isostatic pressing is used to compress explosives and pyrotechnics, in order to achieve safe ultra-high hydraulic pressure, the sealing requirements of the high-pressure cylinder are very stringent. A solution to this sealing problem has not been found so far, which has long hindered the application of isostatic pressing technology in the field of explosives and pyrotechnics. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide an ultra-high pressure sealing structure for an isostatic pressurized cylinder.

[0005] The technical solution adopted by this utility model is:

[0006] An isostatic pressurized cylinder ultra-high pressure sealing structure includes a high-pressure cylinder, a high-pressure chamber inside the high-pressure cylinder, high-pressure heads connected to both ends of the high-pressure cylinder, and a sealing gasket, an ultra-high pressure triangular sealing ring group and a Y-shaped sealing ring arranged in sequence between the high-pressure head and the inner wall of the high-pressure cylinder. The Y-shaped sealing ring is located on the side of the ultra-high pressure triangular sealing ring group close to the high-pressure chamber.

[0007] When the mechanism is working, the product is encapsulated in the high-pressure chamber. By continuously filling oil into the high-pressure chamber from the pressurized oil channel on the high-pressure head, the oil pressure in the high-pressure chamber is continuously increased, thereby achieving isostatic pressing of the product.

[0008] The hydraulic seal of the high-pressure head adopts a triple sealing method of sealing gasket, ultra-high-pressure triangular sealing ring group and Y-type sealing ring.

[0009] The outermost seal of the high-pressure head uses a Y-shaped sealing ring. During operation, the Y-shaped sealing ring is not only pushed downward by the liquid, but also presses inward and outward from the liquid in the Y-shaped groove. These two forces make the Y-shaped sealing ring tightly adhere to the sealing surface of the inner wall of the high-pressure cylinder and the outer sealing surface of the high-pressure head. The greater the liquid pressure, the tighter the sealing surface fits, achieving high-pressure sealing.

[0010] Under the Y-ring of the high-pressure head, there is a set of ultra-high-pressure triangular sealing rings. During operation, the downward thrust of the liquid on the Y-ring acts directly on the ultra-high-pressure triangular sealing ring group. Through the extrusion of the inclined surface, the pair of ultra-high-pressure triangular sealing rings expand inward and outward respectively, forming high-pressure sealing surfaces between them and between them and the inner wall of the high-pressure cylinder and the outer circle of the high-pressure head respectively. The greater the liquid pressure, the greater the deformation and expansion, and the tighter the sealing surface fit, achieving ultra-high-pressure sealing.

[0011] A sealing gasket is installed under the ultra-high-pressure triangular sealing ring group of the high-pressure head. During operation, the liquid pressure applied to the ultra-high-pressure triangular sealing ring group directly acts on the sealing gasket, causing it to be squeezed and deformed, expanding inward and outward. The deformation in these two directions makes the sealing gasket tightly fit the sealing surface of the inner wall of the high-pressure cylinder and the outer cylindrical sealing surface of the high-pressure head. The greater the liquid pressure, the greater the deformation, and the tighter the sealing surface fits, achieving ultra-high-pressure sealing.

[0012] The hydraulic seal of the high-pressure head of this utility model utilizes a triple sealing method consisting of a sealing gasket, an ultra-high-pressure triangular sealing ring assembly, and a Y-shaped sealing ring, enabling ultra-high-pressure sealing in isostatic pressing for explosives. During isostatic pressing of explosives, the ultra-high-pressure seal of this utility model enables safe ultra-high hydraulic pressure to be achieved within the high-pressure cylinder.

[0013] As a preferred solution of the present invention, the material of the sealing gasket is polytetrafluoroethylene. A sealing gasket made of polytetrafluoroethylene is arranged under the ultra-high pressure triangular sealing ring group of the high pressure head.

[0014] As a preferred solution of the present invention, the ultra-high pressure triangular sealing ring group includes two ultra-high pressure triangular sealing rings, which are spliced ​​in opposite directions. The cross-sectional shape of the spliced ​​ultra-high pressure triangular sealing ring group is rectangular.

[0015] As a preferred solution of the present invention, the material of the ultra-high pressure triangular sealing ring is refined brass. An ultra-high pressure triangular sealing ring group made of refined brass is arranged under the Y-shaped sealing ring of the high pressure head.

[0016] As a preferred solution of the present invention, the material of the Y-shaped sealing ring is polyurethane. The outermost sealing layer of the high-pressure head adopts a Y-shaped sealing ring made of polyurethane.

[0017] As a preferred embodiment of the present invention, the high-pressure end cap includes a connecting portion and a sealing portion, which are integrally formed. The connecting portion is pressed tightly against the end face of the high-pressure cylinder body. The sealing portion is sleeved within the high-pressure cylinder body. The sealing gasket, ultra-high-pressure triangular sealing ring assembly, and Y-shaped sealing ring are disposed on the sealing portion. The connecting portion can be reliably connected to the high-pressure cylinder body, and the sealing portion can be reliably sealed to the high-pressure cylinder body via the sealing gasket, ultra-high-pressure triangular sealing ring assembly, and Y-shaped sealing ring.

[0018] As a preferred solution of the present invention, an installation step groove is provided on the sealing part, and the sealing gasket, ultra-high pressure triangular sealing ring group and Y-shaped sealing ring are installed in the installation step groove in sequence, thereby ensuring the stable position of the sealing gasket, ultra-high pressure triangular sealing ring group and Y-shaped sealing ring.

[0019] As a preferred solution of the present invention, a sealing ring cover is connected to the end surface of the sealing portion, which can limit the position of the Y-shaped sealing ring.

[0020] As a preferred embodiment of the present invention, a pressurized oil channel is provided within the high-pressure sealing head, one end of which communicates with the outside world and the other end with the high-pressure chamber. During operation, the product is encapsulated within the high-pressure chamber, and oil is continuously pumped into the chamber from the pressurized oil channel on the high-pressure sealing head, increasing the oil pressure within the chamber and achieving isostatic pressing of the product.

[0021] As a preferred embodiment of the present invention, the pressurized oil passage comprises interconnected transverse and longitudinal oil passages. The transverse oil passage's end, remote from the longitudinal oil passage, communicates with the outside world, while the longitudinal oil passage's end, remote from the transverse oil passage, communicates with the high-pressure chamber. The transverse oil passage's oil inlet is located on the circumferential surface of the connecting portion, preventing the hydraulic mechanism connected to the high-pressure end face from blocking the transverse oil passage's oil inlet.

[0022] The beneficial effects of the utility model are:

[0023] The hydraulic seal of the high-pressure head of this utility model utilizes a triple sealing method consisting of a sealing gasket, an ultra-high-pressure triangular sealing ring assembly, and a Y-shaped sealing ring, enabling ultra-high-pressure sealing in isostatic pressing for explosives. During isostatic pressing of explosives, the ultra-high-pressure seal of this utility model enables safe ultra-high hydraulic pressure to be achieved within the high-pressure cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional view of the utility model;

[0025] Figure 2 It is a cross-sectional view of the high-pressure head;

[0026] Figure 3 yes Figure 1 A partial enlarged view of point A in the middle.

[0027] In the figure: 1-high-pressure cylinder body; 2-high-pressure head; 3-sealing gasket; 4-ultra-high-pressure triangular sealing ring; 5-Y-type sealing ring; 6-sealing ring cover; 11-high-pressure chamber; 21-connecting part; 22-sealing part; 23-mounting step groove; 24-transverse oil channel; 25-longitudinal oil channel. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without inventive effort are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features therein may be combined with each other unless there is a conflict.

[0030] like Figures 1 to 3 As shown, the ultra-high pressure sealing structure of the isostatic pressurized cylinder of this embodiment includes a high-pressure cylinder 1, the interior of the high-pressure cylinder 1 is a high-pressure chamber 11, both ends of the high-pressure cylinder 1 are connected to a high-pressure head 2, and a sealing gasket 3, an ultra-high pressure triangular sealing ring group and a Y-type sealing ring 5 are arranged in sequence between the high-pressure head 2 and the inner wall of the high-pressure cylinder 1. The Y-type sealing ring 5 is located on the side of the ultra-high pressure triangular sealing ring group close to the high-pressure chamber 11.

[0031] When the mechanism is working, the product is encapsulated in the high-pressure chamber 11. By continuously filling oil into the high-pressure chamber 11 from the pressurized oil channel on the high-pressure head 2, the oil pressure in the high-pressure chamber 11 is continuously increased, thereby achieving isostatic pressing of the product.

[0032] The hydraulic seal of the high-pressure head 2 adopts a triple sealing method of a sealing gasket 3, an ultra-high-pressure triangular sealing ring group and a Y-shaped sealing ring 5.

[0033] The outermost seal of the high-pressure head 2 uses a Y-shaped sealing ring 5. When working, the Y-shaped sealing ring 5 is not only pushed downward by the liquid, but also presses inward and outward on the sealing ring in the Y-shaped groove. These two forces make the Y-shaped sealing ring 5 tightly adhere to the inner wall sealing surface of the high-pressure cylinder 1 and the outer circle sealing surface of the high-pressure head 2. The greater the liquid pressure, the tighter the sealing surface fits, achieving high-pressure sealing. Figure 3As shown, P1, P2, and P3 are the stress conditions of the Y-shaped sealing ring 5.

[0034] Under the Y-shaped sealing ring 5 of the high-pressure head 2, there is a set of ultra-high-pressure triangular sealing rings. During operation, the downward thrust of the liquid on the Y-shaped sealing ring 5 directly acts on the ultra-high-pressure triangular sealing ring group. Through the extrusion of the inclined surface, the pair of ultra-high-pressure triangular sealing rings 4 are respectively expanded inward and outward, thereby forming high-pressure sealing surfaces between them and between them and the inner wall of the high-pressure cylinder 1 and the outer circle of the high-pressure head 2 respectively. The greater the liquid pressure, the greater the deformation and expansion, and the tighter the sealing surface fits, thus achieving ultra-high-pressure sealing. Figure 3 As shown, δ1 is the stress condition of the ultra-high pressure triangular sealing ring 4.

[0035] A sealing gasket 3 is set under the ultra-high pressure triangular sealing ring group of the high-pressure head 2. During operation, the liquid pressure applied to the ultra-high pressure triangular sealing ring group directly acts on the sealing gasket 3, causing the sealing gasket 3 to be squeezed and deformed, expanding inward and outward. The deformation in these two directions makes the sealing gasket 3 tightly fit the inner wall sealing surface of the high-pressure cylinder 1 and the outer circle sealing surface of the high-pressure head 2. The greater the liquid pressure, the greater the deformation, and the tighter the sealing surface fits, thus achieving ultra-high pressure sealing. Figure 3 As shown, δ2 is the stress condition of the sealing gasket 3.

[0036] The hydraulic seal of the high-pressure end cap 2 of the present invention utilizes a triple sealing method consisting of a sealing gasket 3, an ultra-high-pressure triangular sealing ring assembly, and a Y-shaped sealing ring 5, enabling ultra-high-pressure sealing during isostatic pressing of explosives. During isostatic pressing of explosives, the ultra-high-pressure seal of the present invention enables safe ultra-high hydraulic pressure to be achieved within the high-pressure cylinder 1.

[0037] Wherein, the material of the sealing gasket 3 is polytetrafluoroethylene. Under the ultra-high pressure triangular sealing ring group of the high pressure head 2, a sealing gasket 3 is arranged, which is made of polytetrafluoroethylene.

[0038] The ultra-high pressure triangular sealing ring group includes two ultra-high pressure triangular sealing rings 4, which are spliced ​​in opposite directions. The cross-section of the spliced ​​ultra-high pressure triangular sealing ring group is rectangular.

[0039] The material of the ultra-high pressure triangular sealing ring 4 is refined brass. An ultra-high pressure triangular sealing ring group is arranged under the Y-shaped sealing ring 5 of the high pressure head 2 and is made of refined brass.

[0040] The material of the Y-shaped sealing ring 5 is polyurethane. The outermost sealing layer of the high-pressure end cap 2 adopts a Y-shaped sealing ring 5 made of polyurethane.

[0041] Specifically, the high-pressure end cap 2 includes a connecting portion 21 and a sealing portion 22, which are integrally formed. The connecting portion 21 is pressed against the end face of the high-pressure cylinder 1, and the sealing portion 22 is sleeved within the high-pressure cylinder 1. The sealing gasket 3, the ultra-high-pressure triangular sealing ring group, and the Y-shaped sealing ring 5 are arranged on the sealing portion 22. The connecting portion 21 can be reliably connected to the high-pressure cylinder 1, and the sealing portion 22 can be reliably sealed with the high-pressure cylinder 1 through the sealing gasket 3, the ultra-high-pressure triangular sealing ring group, and the Y-shaped sealing ring 5.

[0042] In order to facilitate the installation of the sealing mechanism, an installation step groove 23 is provided on the sealing portion 22, and the sealing gasket 3, the ultra-high pressure triangular sealing ring group and the Y-shaped sealing ring 5 are installed in the installation step groove 23 in sequence, thereby ensuring that the positions of the sealing gasket 3, the ultra-high pressure triangular sealing ring group and the Y-shaped sealing ring 5 are stable.

[0043] A sealing ring cover plate 6 is connected to the end surface of the sealing portion 22. The sealing ring cover plate 6 can limit the Y-shaped sealing ring 5.

[0044] To supply oil to the high-pressure cylinder, a pressurized oil channel is provided in the high-pressure head 2. One end of the pressurized oil channel is connected to the outside world, and the other end is connected to the high-pressure chamber 11. When the mechanism is in operation, the product is encapsulated in the high-pressure chamber 11. By continuously filling the high-pressure chamber 11 with oil from the pressurized oil channel on the high-pressure head 2, the oil pressure in the high-pressure chamber 11 is continuously increased, achieving isostatic pressing of the product.

[0045] The pressurized oil passage comprises a transverse oil passage 24 and a longitudinal oil passage 25, which are interconnected. The end of the transverse oil passage 24 away from the longitudinal oil passage 25 is connected to the outside, while the end of the longitudinal oil passage 25 away from the transverse oil passage 24 is connected to the high-pressure chamber 11. The oil inlet of the transverse oil passage 24 is provided on the circumferential surface of the connecting portion 21 to prevent the oil pressure mechanism connected to the end face of the high-pressure head 2 from blocking the oil inlet of the transverse oil passage 24.

[0046] The present invention is not limited to the above-mentioned optional implementation methods. Anyone can derive various other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that falls within the scope defined by the claims of the present invention shall fall within the scope of protection of the present invention.

Claims

1. An isostatic pressure cylinder ultra-high pressure sealing structure, characterized by: The invention comprises a high-pressure cylinder (1), wherein the interior of the high-pressure cylinder (1) is a high-pressure chamber (11), and both ends of the high-pressure cylinder (1) are connected to high-pressure heads (2). A sealing gasket (3), an ultra-high-pressure triangular sealing ring group, and a Y-shaped sealing ring (5) are sequentially arranged between the high-pressure head (2) and the inner wall of the high-pressure cylinder (1), and the Y-shaped sealing ring (5) is located on a side of the ultra-high-pressure triangular sealing ring group close to the high-pressure chamber (11).

2. The isostatic pressure cylinder ultra-high pressure sealing structure according to claim 1, characterized in that: The material of the sealing gasket (3) is polytetrafluoroethylene.

3. The isostatic pressure cylinder ultra-high pressure sealing structure according to claim 1, characterized in that: The ultra-high pressure triangular sealing ring group comprises two ultra-high pressure triangular sealing rings (4), which are joined in opposite directions. The cross-sectional shape of the joined ultra-high pressure triangular sealing ring group is a rectangle.

4. The isostatic pressure cylinder ultra-high pressure sealing structure according to claim 3, characterized in that: The material of the ultra-high pressure triangular sealing ring (4) is refined brass.

5. The isostatic pressure cylinder ultra-high pressure sealing structure according to claim 1, characterized in that: The material of the Y-shaped sealing ring (5) is polyurethane material.

6. The isostatic pressure cylinder ultra-high pressure sealing structure according to claim 1, characterized in that: The high-pressure sealing head (2) comprises a connecting portion (21) and a sealing portion (22), the connecting portion (21) and the sealing portion (22) being integrally formed, the connecting portion (21) being pressed against the end face of the high-pressure cylinder (1), the sealing portion (22) being sleeved in the high-pressure cylinder (1), and the sealing gasket (3), the ultra-high-pressure triangular sealing ring group and the Y-shaped sealing ring (5) being arranged on the sealing portion (22).

7. The isostatic pressure cylinder ultra-high pressure sealing structure according to claim 6, characterized in that: The sealing portion (22) is provided with an installation step groove (23), and the sealing gasket (3), the ultra-high pressure triangular sealing ring group and the Y-shaped sealing ring (5) are sequentially installed in the installation step groove (23).

8. The isostatic pressure cylinder ultra-high pressure sealing structure according to claim 6, characterized in that: A sealing ring cover plate (6) is connected to the end surface of the sealing portion (22).

9. The isostatic pressure cylinder ultra-high pressure sealing structure according to claim 1, characterized in that: A pressurized oil channel is provided in the high-pressure sealing head (2), one end of the pressurized oil channel is communicated with the outside, and the other end of the pressurized oil channel is communicated with the high-pressure chamber (11).

10. The isostatic pressure cylinder ultra-high pressure sealing structure according to claim 9, characterized in that: The pressurized oil passage comprises a transverse oil passage (24) and a longitudinal oil passage (25) which are in communication with each other. One end of the transverse oil passage (24) away from the longitudinal oil passage (25) is in communication with the outside world, and one end of the longitudinal oil passage (25) away from the transverse oil passage (24) is in communication with the high-pressure chamber (11).

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