A sealing device for an ultra-high dynamic pressure chamber

Abstract

The present invention discloses a sealing device for an ultra-high dynamic pressure chamber, wherein an annular gap is provided between the outer peripheral edge of the inner end portion of a base and the inner peripheral wall of the chamber opening, an elastic sealing ring assembly for sealing the annular gap is sleeved in the annular gap, and a top cover for pressing the elastic sealing assembly is provided on the inner end portion of the base, the outer peripheral edge of the top cover is close to the inner peripheral wall of the chamber opening, an annular protrusion coaxially arranged therewith is provided on the end surface of the top cover away from the base, the outer peripheral edge of the annular protrusion is spaced apart from the inner peripheral wall of the chamber opening, and the annular protrusion is arranged corresponding to the annular gap along the radial direction of the top cover, the annular protrusion is gradually inclined toward its outer peripheral side in the direction axially away from the top cover, the outer end portion of the base is abutted against a latch body, and the annular protrusion is provided so that ultra-high pressure impact gas converges toward the center of the top cover, and the gas pressure impacting the top cover and the annular gap is gradually reduced, thereby indirectly enhancing the sealing effect of the entire device.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing equipment, and in particular to a sealing device for an ultra-high dynamic pressure chamber. Background Art

[0002] Industrial development is inseparable from various types of pressure vessels, and the sealing characteristics of the container cavity are the top priority of pressure vessel design, which is related to whether the pressure vessel can meet people's requirements for chemical production, gas transportation, power output, etc. According to my country's "Regulations on Safety Technical Supervision of Pressure Vessels", pressure vessels can be divided into four pressure levels: low pressure (design pressure of 0.1MPa~1.6MPa, code L), medium pressure (design pressure of 1.6MPa~10MPa, code M), high pressure (design pressure of 10MPa~100MPa, code H), and ultra-high pressure (design pressure greater than 100MPa, code U). Good sealing of containers can sometimes directly improve the production efficiency of chemical production and achieve production efficiency improvement. The synthesis of some specific substances even requires an ultra-high pressure environment, and the operation of some special equipment requires ultra-high pressure environment, etc. Poor sealing will not only affect the working effect of the container cavity, but also shorten the service life of some parts, and even cause material leakage or even explosion, causing equipment damage and huge economic losses, leading to environmental damage and casualties and other safety accidents. With the rapid development of industry, the requirements for gas sealing of high-pressure cavities are getting higher and higher, and the pressure in pressure vessels is mostly non-static process. At present, there is an urgent need for a gas seal that can cope with ultra-high dynamic pressure cavities.

[0003] At present, ordinary sealing technologies, such as gas transmission or gas compressors, and the seals of automobile engine cylinders can generally only withstand a pressure of tens of MPa at most, and the gas pressure in some container chambers is not always constant during operation. When the pressure changes, impact-type pressure will be generated on the chamber and the sealing device. The existing sealing technology or devices are far from meeting the gas sealing requirements of ultra-high dynamic pressure chambers. Common high-pressure seals (multi-stage combination seals and controllable mechanical seals) generally cannot withstand impact-type pressures, and are mostly seen in axial liquid seals, and their uses are limited. Summary of the invention

[0004] The present invention aims to provide a sealing device for an ultra-high dynamic pressure chamber to solve the problems existing in the above-mentioned prior art. When subjected to ultra-high impact pressure, the pressure is concentrated at the middle position of the top cover by setting an annular protrusion, thereby reducing the pressure on the outer peripheral edge of the top cover and ensuring the sealing effect.

[0005] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a sealing device for an ultra-high dynamic pressure chamber, comprising a base coaxially clamped at the chamber opening, an annular space between the outer peripheral edge of the inner end of the base and the inner peripheral wall of the chamber opening, an elastic sealing ring assembly for sealing the annular space is sleeved in the annular space, the end surface of the elastic sealing ring assembly protrudes axially from the inner end of the base, and a top cover for pressing the elastic sealing assembly is provided on the inner end of the base, the outer peripheral edge of the top cover is close to the inner peripheral wall of the chamber opening, an annular protrusion coaxially arranged therewith is provided on the end surface of the top cover away from the base, the outer peripheral edge of the annular protrusion is spaced from the inner peripheral wall of the chamber opening, and the annular protrusion is arranged corresponding to the annular space along the radial direction of the top cover, the annular protrusion is in a structure gradually inclined toward its outer peripheral side in the direction axially away from the top cover, the outer end of the base is abutted against a latch body, and the latch body is detachably connected to the chamber opening.

[0006] Preferably, the elastic sealing assembly includes an elastic sealing ring sleeved at the annular gap and a pressing ring crimped with the elastic sealing ring, wherein the pressing ring is located between the elastic sealing ring and the top cover, and the end surface of the pressing ring that does not contact the elastic sealing ring protrudes from the inner end portion of the base and fits with the top cover.

[0007] Preferably, the base comprises a supporting section, the outer peripheral wall of the supporting section is close to the inner peripheral wall of the chamber opening, and the supporting section is provided with an annular supporting surface connected to the annular gap and used for supporting the elastic sealing ring.

[0008] Preferably, the support surface gradually inclines toward the outer circumference of the elastic sealing ring in the direction axially away from the elastic sealing ring, a high-pressure sealing ring is provided between the support surface and the elastic sealing ring, and the high-pressure sealing ring is provided with a chamfer that fits the support surface.

[0009] Preferably, a low-pressure sealing ring is provided between the high-pressure sealing ring and the elastic sealing ring, one end of the low-pressure sealing ring is tightly fitted with the high-pressure sealing ring, and the end face of the other end is parallel to the side of the pressure ring close to the elastic sealing ring.

[0010] Preferably, the base further comprises a clamping section located on the side of the support section away from the top cover, the peripheral edge of the clamping section radially protrudes from the outer peripheral wall of the support section and is embedded in the inner peripheral wall at the opening of the chamber.

[0011] Preferably, an annular notch matching the clamping section structure is provided on the inner circumferential wall at the chamber opening, an annular notch is provided with an annular end face close to the supporting section, the clamping section overlaps the annular end face, and the plane where the annular end face is located is parallel to the radial direction of the clamping section.

[0012] Preferably, a sealing copper ring is extruded between the clamping section and the annular end surface.

[0013] Preferably, the chamber opening includes an entrance section for the entire base to enter its interior, the entrance section is coaxially arranged with the clamping section, and a threaded structure threadedly connected to the latch body is provided on the inner circumferential wall of the entrance section.

[0014] Preferably, the latch body comprises a boss abutting against the clamping section and coaxially arranged therewith, and a radial cross-section of the boss is smaller than a radial cross-section of the clamping section.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] First, the base is clamped on the inner wall of the chamber opening, and the base is firmly tightened at the chamber opening through a latch body that is detachably connected to the chamber opening to ensure that the position of the base will not change when subjected to pressure in the chamber, and then an elastic sealing ring assembly is sleeved in the annular interval between the base and the inner wall of the chamber opening, and the top cover is used to press it, so that the elastic assembly is deformed in the annular interval, and the annular interval is sealed to complete the sealing between the base and the chamber opening. Furthermore, during the process of the entire device being under pressure, the ultra-high impact pressure will first impact the top cover, and the inner side of the annular protrusion on the top cover will gradually gather toward the middle position of the top cover to guide the ultra-high pressure impact gas to converge to the center of the top cover, thereby strengthening the squeezing of the elastic sealing assembly by the top cover. After the top cover and the base are connected, the top cover has already squeezed the elastic sealing component to a certain extent. The elastic sealing component is deformed under pressure to initially fill the annular gap. At this time, the top cover is affected by the high-pressure impact gas, which increases the squeezing of the elastic sealing component by the top cover, making the elastic sealing component deform more fully and filling the annular gap more fully, thereby improving the sealing effect. Furthermore, as the inner side of the annular protrusion on the top cover gradually converges toward the middle position of the top cover, the ultra-high-pressure impact gas flows along the outer peripheral side of the annular protrusion and its flow cross-section gradually expands during the axial flow. The gas flow rate remains unchanged, thereby reducing the speed of the impact gas, and the gas pressure impacting the top cover and the annular gap gradually decreases, thereby indirectly enhancing the sealing effect of the entire device.

[0017] Second, the elastic sealing assembly includes an elastic sealing ring mounted on the annular gap and a pressure ring for crimping the elastic sealing ring. The pressure ring is located between the elastic sealing ring and the top cover. The end face of the pressure ring that does not contact the elastic sealing ring protrudes from the inner end of the base and fits with the top cover. By providing the pressure ring, it can be ensured that the top cover has sufficient pressing effect on the elastic sealing ring, so that the elastic sealing ring can fully seal the annular gap, and the pressing direction and pressing effect can be ensured through the close fit between the pressure ring and the top cover.

[0018] Third, the base includes a supporting section, the outer peripheral wall of the supporting section is close to the inner peripheral wall of the chamber opening, and the supporting section is provided with an annular supporting surface connected to the annular gap and used to support the elastic sealing ring, so that the elastic sealing ring can be fully deformed between the annular supporting surface and the pressure ring, thereby ensuring the effect of dense sealing of the annular gap.

[0019] Fourth, the support surface is gradually inclined toward the outer peripheral side of the elastic sealing ring along the axial direction away from the elastic sealing ring. A high-pressure sealing ring is provided between the support surface and the elastic sealing ring. The high-pressure sealing ring is provided with a chamfer that fits the support surface. It can be seen from the above that the chamfer cooperates with the inclined support surface to change the overflow direction of the gas, thereby hindering the overflow of the gas and further playing a sealing role. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a cross-sectional view of the connection between the base and the chamber opening of the present invention;

[0022] Figure 2 This is a schematic diagram of the top cover structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the overall structure of the base of the present invention;

[0024] Among them, 1-chamber opening, 2-top cover, 3-screw, 4-base, 5-pressure ring, 6-elastic sealing ring, 7-low-pressure sealing ring, 8-high-pressure sealing ring, 9-sealing copper ring, 10-threaded structure, 11-boss, 12-latch body, 13-support section, 14-clamping section, 15-annular notch, 16-annular protrusion, 17-chamfer, 18-support surface, 19-threaded hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The purpose of the present invention is to provide a sealing device for an ultra-high dynamic pressure chamber to solve the problems existing in the above-mentioned prior art. Under the condition of ultra-high impact pressure, the pressure is concentrated in the middle position of the top cover by setting the annular protrusion, and the pressure on the outer peripheral edge of the top cover is reduced, thereby ensuring the sealing effect.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Please refer to Figures 1 to 3The present embodiment provides a sealing device for an ultra-high dynamic pressure chamber, comprising a base 4 coaxially clamped at the chamber opening 1. The base 4 is preferably made of a hard material to ensure its connection and support strength, for example, a hard metal material is selected. An annular gap is provided between the outer peripheral edge of the inner end of the base 4 and the inner peripheral wall of the chamber opening 1. An elastic sealing ring 6 component for sealing the inner end is sleeved in the annular gap. The end surface of the elastic sealing ring 6 component protrudes axially from the inner end of the base 4, and a top cover 2 for pressing the elastic sealing component is provided on the inner end of the base 4. The top cover 2 is preferably connected to the base 4 by evenly distributed screws 3. Screw holes for bolts to pass through are provided on the top cover 2 and the base 4. The outer peripheral edge of the top cover 2 is close to the inner peripheral wall of the chamber opening 1, and the end surface of the top cover 2 away from the base 4 is provided with an annular protrusion 16 coaxially arranged therewith, the outer peripheral edge of the annular protrusion 16 is arranged at intervals with the inner peripheral wall of the chamber opening 1, and the annular protrusion 16 is arranged corresponding to the annular interval along the radial direction of the top cover 2, and the annular protrusion 16 is gradually inclined toward its outer peripheral side in the direction away from the top cover 2 in the axial direction. The outer end of the base 4 is abutted with a latch body 12, and the latch body 12 is detachably connected to the chamber opening 1. First, the base 4 is clamped on the inner peripheral wall of the chamber opening 1, and the base 4 is firmly tightened at the chamber opening 1 through the detachable connection of the latch body 12 to ensure that the base 4 is firmly tightened. To ensure that the position of the base 4 does not change when subjected to the pressure in the chamber, an elastic sealing ring 6 assembly is sleeved in the annular interval between the base 4 and the inner circumferential wall of the chamber opening 1, and is pressed by the top cover 2, so that the elastic assembly is deformed in the annular interval, and the annular interval is blocked to complete the sealing between the base 4 and the chamber opening 1. Furthermore, in the process of the entire device being under pressure, the ultra-high impact pressure will first impact the top cover 2, and the inner side of the annular protrusion 16 on the top cover 2 will gradually gather toward the middle position of the top cover 2 to guide the ultra-high pressure impact gas to converge toward the center of the top cover 2, thereby strengthening the squeezing of the elastic sealing assembly by the top cover 2. After the top cover 2 is connected to the base 4, the top cover 2 has already pressed the elastic seal The components are squeezed to a certain extent, and the elastic sealing components are deformed under pressure to initially fill the annular gap. At this time, the high-pressure impact gas increases the squeezing of the elastic sealing components by the top cover 2, making the elastic sealing components deform more fully, filling the annular gap more fully, and improving the sealing effect. Furthermore, since the inner side of the annular protrusion 16 on the top cover 2 gradually converges toward the middle position of the top cover 2, the ultra-high-pressure impact gas flows along the outer peripheral side of the annular protrusion 16. During its axial flow, the flow cross-section gradually expands, the gas flow rate remains unchanged, and the speed of the impact gas is reduced. The gas pressure impacting the top cover 2 and the annular gap is gradually reduced, which indirectly enhances the sealing effect of the entire device.

[0029] Among them, the elastic sealing component includes an elastic sealing ring 6 sleeved on the annular interval and a pressing ring 5 crimped on the elastic sealing ring 6. The elastic sealing ring 6 is preferably a rubber sealing ring, etc. The pressing ring 5 is made of hard metal material. The pressing ring 5 is located between the elastic sealing ring 6 and the top cover 2. The end face of the pressing ring 5 that does not contact the elastic sealing ring 6 protrudes from the inner end of the base 4 and fits with the top cover 2. By setting the pressing ring 5, it can be ensured that the top cover 2 has sufficient pressing effect on the elastic sealing ring 6, so that the elastic sealing ring 6 can fully block the annular interval, and the pressing direction and pressing effect can be ensured through the close cooperation between the pressing ring 5 and the top cover 2.

[0030] Moreover, the base 4 includes a supporting section 13, the outer peripheral wall of the supporting section 13 is close to the inner peripheral wall of the chamber opening 1, and the supporting section 13 is provided with an annular supporting surface 18 connected to the annular gap and used to support the elastic sealing ring 6, so that the elastic sealing ring 6 can be fully deformed between the annular supporting surface 18 and the pressure ring 5, thereby ensuring the effect of dense sealing of the annular gap.

[0031] Preferably, the support surface 18 gradually inclines toward the outer peripheral side of the elastic sealing ring 6 in the direction axially away from the elastic sealing ring 6, and a high-pressure sealing ring 8 is provided between the support surface 18 and the elastic sealing ring 6. The high-pressure sealing ring 8 is provided with a chamfer 17 that fits with the support surface 18. It can be seen from the above that the chamfer 17 cooperates with the inclined support surface 18 to change the overflow direction of the gas, thereby hindering the overflow of the gas and further playing a sealing role.

[0032] Furthermore, a low-pressure sealing ring 7 is provided between the high-pressure sealing ring 8 and the elastic sealing ring 6. Preferably, the high-pressure sealing ring 8 and the low-pressure sealing ring 7 are both made of hard metal materials. One end of the low-pressure sealing ring 7 is tightly fitted with the high-pressure sealing ring 8, and preferably, it is parallel to the end face of the high-pressure sealing ring 8, and the parallel direction is along the radial direction of the annular interval. The end face of the other end is parallel to the side of the pressure ring 5 close to the elastic sealing ring 6. By providing the low-pressure sealing ring 7, the elastic sealing ring 6 is separated from the support surface 18 to avoid the elastic sealing ring 6 from contacting the inclined support surface 18 after being squeezed, which is easy to damage the elastic sealing ring 6. In addition, by making the end face of the low-pressure sealing ring 7 parallel to the pressure ring 5, the deformation effect of the elastic sealing ring 6 between the two is guaranteed, that is, it can extend radially along the annular interval to fully form a barrier to the annular interval.

[0033] As a preferred embodiment of the present invention, the base 4 also includes a clamping section 14 located on the side of the support section 13 away from the top cover 2. The outer peripheral edge of the clamping section 14 radially protrudes from the outer peripheral wall of the support section 13 and is embedded in the inner peripheral wall of the chamber opening 1. The clamping section 14 is provided to ensure that the position of the base 4 at the chamber opening 1 is axially fixed. Specifically, it cooperates with the latch body 12 to squeeze the clamping section 14, which can ensure that the base 4 will not move toward the outside of the chamber opening 1 after being impacted by the ultra-high pressure gas, and can also avoid moving toward the inside of the chamber opening 1 under the extrusion of the latch body 12.

[0034] Among them, an annular notch 15 matching the structure of the clamping section 14 is provided on the inner circumferential wall at the chamber opening 1, and an annular end face close to the support section 13 is provided on the annular notch 15, and the clamping section 14 overlaps the annular end face. By setting the annular notch 15, the clamping section 14 can be quickly overlapped on the annular notch 15 and complete the fixation of the base 4, and the plane where the annular end face is located is parallel to the radial direction of the clamping section 14, thereby ensuring the axial fixation of the base 4 along the chamber opening 1. Further, by setting the annular notch 15, an L-shaped contact surface is formed after the clamping portion contacts the annular notch 15, so as to change the gas overflow flow direction and fully improve the sealing performance. Preferably, the connection between the outer circumferential wall of the support section 13 and the clamping section 14 forms an L-shaped side surface, and the annular notch 15 forms an L-shaped structure matching the L-shaped side surface.

[0035] Moreover, a sealing copper ring 9 is extruded between the clamping section 14 and the annular end face. Since the sealing copper ring 9 is made of a relatively soft material, during use, the clamping portion is squeezed by the latch body 12, so that the sealing copper ring 9 is deformed between the clamping section 14 and the annular end face and fully fills the gap between the two, thereby further improving the overall sealing performance.

[0036] Furthermore, the chamber opening 1 includes an inlet section for the entire base 4 to enter its interior. Specifically, the radial cross-section of the inlet section is larger than the radial cross-section of any part of the base 4, so that the base 4 can easily pass through the inlet section and be clamped at the corresponding position. The inlet section is coaxially arranged with the clamping section 14, and a threaded structure 10 threadedly connected to the latch body 12 is provided on the inner circumferential wall of the inlet section. By providing the threaded structure 10, the latch body 12 can rotate quickly and complete the work of tightening the clamping section 14.

[0037] Preferably, the latch body 12 includes a boss 11 that abuts against the clamping section 14 and is coaxially arranged therewith, and the radial cross-section of the boss 11 is smaller than the radial cross-section of the clamping section 14. By setting the boss 11, it can be unaffected by the structure of the annular notch 15 and can directly abut against the clamping section 14, thereby being able to fully tighten the base 4.

[0038] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0039] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0040] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A sealing device for an ultra-high dynamic pressure chamber, characterized in that: The cam is provided with a plurality of sealing members, each of which is provided with a plurality of sealing members, each of which is provided with a plurality of sealing members, each of which is provided with a plurality of sealing members, each of which is provided with a plurality of sealing members. The elastic sealing ring assembly includes an elastic sealing ring sleeved at the annular interval and a pressing ring crimping the elastic sealing ring, wherein the pressing ring is located between the elastic sealing ring and the top cover, and the end surface of the pressing ring not contacting the elastic sealing ring protrudes from the inner end of the base and fits the top cover; The base comprises a support section, the outer peripheral wall of the support section is close to the inner peripheral wall of the chamber opening, and the support section is provided with an annular support surface connected with the annular spacer and used to support the elastic sealing ring; The support surface is gradually inclined toward the outer peripheral side of the elastic sealing ring in the direction away from the elastic sealing ring in the axial direction, a high-pressure sealing ring is provided between the support surface and the elastic sealing ring, and the high-pressure sealing ring is provided with a chamfer that fits the support surface; A low-pressure sealing ring is provided between the high-pressure sealing ring and the elastic sealing ring, one end of the low-pressure sealing ring is tightly fitted with the high-pressure sealing ring, and the end surface of the other end is parallel to the side of the pressure ring close to the elastic sealing ring; The base also includes a clamping section located on the side of the support section away from the top cover. The outer peripheral edge of the clamping section protrudes radially from the outer peripheral wall of the support section and is embedded in the inner peripheral wall at the opening of the chamber.

2. The sealing device for an ultra-high dynamic pressure chamber according to claim 1, characterized in that: An annular notch matching the clamping section structure is provided on the inner circumferential wall at the chamber opening, and an annular end face close to the supporting section is provided on the annular notch. The clamping section overlaps the annular end face, and the plane where the annular end face is located is parallel to the radial direction of the clamping section.

3. The sealing device for an ultra-high dynamic pressure chamber according to claim 2, characterized in that: A sealing copper ring is extruded between the clamping section and the annular end surface.

4. The sealing device for an ultra-high dynamic pressure chamber according to claim 3, characterized in that: The chamber opening comprises an inlet section for the entire base to enter the interior thereof, the inlet section is coaxially arranged with the clamping section, and a threaded structure threadably connected to the latch body is provided on the inner peripheral wall of the inlet section.

5. The sealing device for an ultra-high dynamic pressure chamber according to claim 4, characterized in that: The latch body comprises a boss abutting against the clamping section and arranged coaxially therewith, and the radial cross section of the boss is smaller than the radial cross section of the clamping section.

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