Squeezing type plugging structure for pressure container

Abstract

The utility model discloses an extrusion type plugging structure for a pressure container, which comprises a tank body, an annular tank body base is arranged at the bottom of the tank body, and a protruding part and an arc-shaped locking block clamping groove are arranged on the side wall of the base. The sealing base makes contact with the protruding part of the annular tank base, the lower surface of the sealing base makes contact with the arc-shaped locking blocks, and the pressing plate makes contact with the arc-shaped locking blocks and is connected with the sealing base through bolts. The lower surface of the arc-shaped locking block clamping groove is a wedge face, the side face extending platform of the sealing base is provided with side face and surface O-shaped sealing ring grooves and corresponding sealing rings, and a plug and waterproof sealant are arranged at the position of the through hole. Three-dimensional sealing is achieved through the double O-shaped sealing rings, leakage of the through hole is eradicated through the full-sealing design, the structure is compact, installation and maintenance are convenient, the device can adapt to the high-pressure working condition, and the safety and reliability of the hydrostatic test are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of hydrostatic testing of pressure vessels, and in particular to a sealing structure for pressure vessel compression. Background Technology

[0002] In hydrostatic testing of pressure vessels, the reliability of the sealing structure directly affects the test results and safety. Existing sealing structures mostly employ either end-face sealing or radial sealing, which suffers from insufficient sealing performance and weak pull-out resistance of the locking structure. For example, a single-seal design is prone to incomplete sealing under high pressure, while rigid connection structures may loosen due to deformation under hydrostatic pressure, potentially leading to safety accidents. Furthermore, existing structures struggle to balance ease of installation and sealing performance, especially for bottom sealing scenarios where both high-strength sealing and convenient disassembly are required. Traditional solutions are insufficient to address these challenges. Therefore, there is an urgent need for a structurally optimized, reliable, and highly stable sealing structure for hydrostatic testing. Utility Model Content

[0003] The purpose of this invention is to provide a sealing structure for pressure vessels using a compression method, thereby solving the aforementioned problems.

[0004] This utility model is achieved through the following technical solution:

[0005] A pressure vessel compression sealing structure includes a tank body with an annular tank base at the bottom. The side wall of the annular tank base has a protrusion near the tank body and an arc-shaped locking block groove away from the tank body. The lower surface of the protrusion of the annular tank base contacts the upper surface of a sealing base. The sealing base is inserted into the arc-shaped locking block groove, with its lower surface contacting the upper surface of the arc-shaped locking block. A pressure plate is positioned between multiple arc-shaped locking blocks, with the sides of the pressure plate contacting the arc-shaped locking blocks. The pressure plate and the sealing base are connected by bolts.

[0006] Furthermore, the lower surface of the arc-shaped locking block groove is a wedge surface, and the groove width of the arc-shaped locking block groove continuously increases along the extension direction of the wedge surface.

[0007] Furthermore, an extended platform is added to the side of the sealing base. A side O-ring groove is formed on the side of the extended platform, and a surface O-ring groove is formed on the upper surface of the extended platform. A side O-ring and a surface O-ring are respectively set in the side O-ring groove and the surface O-ring groove. The sealing base also has a through hole that runs through the upper and lower surfaces, and a plug is set at the position of the through hole on the upper surface of the sealing base. Waterproof sealant is applied to the contact point between the plug and the upper surface of the sealing base.

[0008] Furthermore, one side of the arc-shaped locking block is a first wedge surface that matches the wedge surface of the arc-shaped locking block slot, and the other side is a second wedge surface. The angle between the second wedge surface and the horizontal plane is larger than the angle between the first wedge surface and the horizontal plane, and the angle between the second wedge surface and the horizontal plane is less than 90 degrees.

[0009] Furthermore, the side of the pressure plate is in contact with the second wedge surface of the arc-shaped locking block, and bolt mounting holes are opened on the lower surface of the pressure plate and bolts are installed. The bolts pass through the bolt mounting holes, through the pressure plate, and through the through holes to the sealing base and the plug in sequence from bottom to top.

[0010] Furthermore, the surface O-ring on the upper surface of the extension platform contacts the lower surface of the protruding part of the annular tank base, and the side O-ring contacts the inner wall of the annular tank base.

[0011] The beneficial effects of this utility model are:

[0012] 1. Double O-rings achieve three-dimensional sealing: The surface O-ring on the extended platform of the sealing base contacts the protruding part of the annular tank base, and the side O-ring fits against the inner wall of the tank, forming a three-dimensional sealing barrier of "face-to-face" and "face-to-wall", which greatly improves the sealing reliability.

[0013] 2. Fully sealed design to prevent leakage through holes: The plug at the through hole of the sealing base is combined with waterproof sealant to seal through structures such as bolt mounting holes, achieving a fully sealed effect for the sealing structure.

[0014] 3. Compact structure and easy installation and maintenance: The bolted connection structure is installed from bottom to top, which is convenient to operate. The wedge-shaped fit design of the pressure plate and locking block can automatically adjust the locking force through mechanical principles to adapt to deformation under different working conditions. At the same time, the modular design of each component facilitates disassembly and replacement of seals, improving test efficiency.

[0015] 4. Stability under high pressure conditions: The gradually widening wedge groove and the optimized angle of the second wedge surface work together to automatically enhance the locking force of the structure under the reverse thrust of water pressure, enabling it to withstand dynamic loads under high pressure and ensuring the safety and reliability of the test process. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the axial cross-sectional structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the radial cross-section structure of this utility model;

[0019] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0020] Figure 4 This is a schematic diagram of the cross-section of the arc-shaped locking block.

[0021] The attached diagram shows the markings and corresponding component names:

[0022] 1-Tank body, 10-Annular tank base, 11-Protrusion, 12-Arc-shaped locking block groove, 13-Through hole, 2-Sealing plug, 3-Bolt, 4-Sealing base, 40-Extension platform, 401-Side O-ring groove, 402-Surface O-ring groove, 5-Arc-shaped locking block, 50-First wedge surface, 51-Second wedge surface, 6-Pressure plate, 7-Side O-ring, 8-Surface O-ring. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0024] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] See the example. Figures 1 to 4 :

[0027] A pressure vessel compression sealing structure includes a tank body 1. The tank body 1 has an annular tank base 10 at its bottom. The side wall of the annular tank base 10 has a protrusion 11 near the tank body 1 and an arc-shaped locking block groove 12 away from the tank body 1. The lower surface of the protrusion 11 of the annular tank base 10 contacts the upper surface of the sealing base 4. The sealing base 4 is inserted into the arc-shaped locking block groove 12 and the lower surface of the sealing base 4 contacts the upper surface of the arc-shaped locking block 5. A pressure plate 6 is provided between multiple arc-shaped locking blocks 5, and the sides of the pressure plate 6 are in contact with the arc-shaped locking blocks 5. The pressure plate 6 and the sealing base 4 are connected by bolts 3.

[0028] Furthermore, the lower surface of the arc-shaped locking block groove 12 is a wedge surface, and the groove width of the arc-shaped locking block groove 12 continuously increases along the extension direction of the wedge surface.

[0029] The wedge structure allows the arc-shaped locking block 5 to be easily inserted into the slot during installation via the inclined guide. As the locking block is pressed into the depth of the slot by the pressure plate 6, the increased slot width creates a "wedge locking" effect. The internal pressure during the water pressure test pushes the locking block back, making it fit tightly against the wedge surface of the slot, enhancing the overall structure's resistance to pull-out and preventing the sealing structure from loosening or falling off under high pressure.

[0030] Furthermore, an extension platform 40 is added to the side of the sealing base 4. A side O-ring groove 401 is formed on the side of the extension platform 40, and a surface O-ring groove 402 is formed on the upper surface of the extension platform 40. A side O-ring 7 and a surface O-ring 8 are respectively provided in the side O-ring groove 401 and the surface O-ring groove 402. The sealing base 4 also has a through hole 13 that penetrates the upper and lower surfaces, and a plug is provided on the upper surface of the sealing base 4 at the position corresponding to the through hole 13. Waterproof sealant is applied to the contact point between the plug and the upper surface of the sealing base 4.

[0031] The double O-rings (side O-ring 7 contacts the inner wall of the base of tank 1, and surface O-ring 8 contacts the lower surface of the protrusion 11 of the base of tank 1) form a three-dimensional sealing structure of "face-to-face" and "face-to-wall", which significantly improves the sealing performance and prevents incomplete sealing during water pressure test; the plug of the through hole 13 is combined with waterproof sealant to isolate the inside and outside and achieve a complete seal.

[0032] Furthermore, one side of the arc-shaped locking block 5 is a first wedge surface 50 that matches the wedge surface of the arc-shaped locking block slot 12, and the other side is a second wedge surface 51. The angle between the second wedge surface 51 and the horizontal plane is larger than the angle between the first wedge surface 50 and the horizontal plane, and the angle between the second wedge surface 51 and the horizontal plane is less than 90 degrees.

[0033] The first wedge surface 50 cooperates with the slot to achieve basic positioning, and the second wedge surface 51 fits against the pressure plate 6. The axial force of the bolt 3 is converted into radial locking force by the tilt angle when the pressure plate 6 is pressed down. The larger included angle makes the lateral thrust of the pressure plate 6 on the locking block stronger, ensuring that the locking block is stable in the slot, while adapting to the deformation caused by water pressure and maintaining the reliability of the seal.

[0034] The angle between the second wedge surface 51 and the horizontal plane is less than 90 degrees, so that the lower end of the second wedge surface 51 is always closer to the arc-shaped locking block groove 12 than the upper end. This way, when the locking bolt 3 is tightened, the arc-shaped locking block 5 can be pushed into the arc-shaped locking block groove 12, thereby squeezing the two O-rings on the sealing base 4 extension platform 40 to achieve a seal.

[0035] Furthermore, the side of the pressure plate 6 is in contact with the second wedge surface 51 of the arc-shaped locking block 5, and the lower surface of the pressure plate 6 has bolt 3 mounting holes and bolts 3 are provided. The bolts 3 pass through the bolt 3 mounting holes from bottom to top, through the pressure plate 6, and through the through hole 13 to pass through the sealing base 4 and connect with the plug.

[0036] The bolt 3 connection structure rigidly connects the pressure plate 6, locking block, and sealing base 4. The pre-tightening force of the bolt 3 drives the pressure plate 6 to squeeze the arc-shaped locking block 5, achieving wedge-face locking. The bolt 3 is installed from the outside to the inside, which facilitates construction operations. The plug can be matched and fixed with the bolt 3 through the connecting thread inside the plug. Then, waterproof sealant is used to fill the gap between the sealing base 4 and the plug to complete the seal and prevent liquid from flowing from the channel formed by the bolt 3 mounting hole and the through hole 13, thus achieving a seal.

[0037] Furthermore, the surface O-ring 8 on the upper surface of the extended platform 40 contacts the lower surface of the protrusion 11 of the annular tank base 10, and the side O-ring 7 contacts the inner wall of the annular tank base 10.

[0038] This creates a double sealing barrier consisting of an upper surface seal and an inner wall seal. The two sets of O-rings act in different sealing directions, forming an end face seal and a radial seal. The two work together to achieve a three-dimensional seal, increasing the reliability of the seal. Simultaneously, the fact that the two sets of O-rings can contact the protrusion 11 of the annular tank base 10 and the inner wall of the annular tank base 10 indicates that the diameter of the surface O-ring 8 and the side O-ring 7 is larger than the depth of the groove they occupy, allowing the surface O-ring 8 and the side O-ring 7 to be compressed and thus sealed.

[0039] The principle of this utility model is as follows:

[0040] The lower surface of the arc-shaped locking block groove 12 is a wedge surface and its width increases continuously along the extension direction of the wedge surface. When the bolt 3 is tightened, the pressure plate 6 exerts pressure on the arc-shaped locking block 5. Since the first wedge surface 50 on one side of the arc-shaped locking block 5 matches the wedge surface of the groove, and the second wedge surface 51 on the other side fits the pressure plate 6 with a larger included angle, the axial force of the bolt 3 is converted into a radial locking force, causing the arc-shaped locking block 5 to move deeper into the groove, and the wedge surface is used to achieve "wedge locking". On the extension platform 40 on the side of the sealing base 4, the side O-ring groove 401 and the surface O-ring groove 402 are respectively installed with the side O-ring 7 and the surface O-ring 8. The former contacts the inner wall of the annular tank base 10, and the latter contacts the lower surface of the protrusion 11 of the annular tank base 10, forming a double barrier of "radial sealing + end face sealing". With the plug at the through hole 13 on the sealing base 4 and the waterproof sealant, a full seal is achieved.

[0041] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A closure structure for a pressure vessel of the extruded type comprising a tank body (1), characterised in that, The tank body (1) is provided with an annular tank base (10) at the bottom. The side wall of the annular tank base (10) is provided with a protrusion (11) near the tank body (1), and an arc-shaped locking block groove (12) is provided on the side wall away from the tank body (1). The lower surface of the protrusion (11) of the annular tank base (10) contacts the upper surface of the sealing base (4). The sealing base (4) is inserted into the arc-shaped locking block groove (12) and the lower surface of the sealing base (4) contacts the upper surface of the arc-shaped locking block (5). A pressure plate (6) is provided between the multiple arc-shaped locking blocks (5) and the side of the pressure plate (6) contacts the arc-shaped locking block (5). The pressure plate (6) and the sealing base (4) are connected by bolts (3).

2. A closure for a pressure vessel according to claim 1, wherein The lower surface of the arc-shaped locking block groove (12) is a wedge surface, and the groove width of the arc-shaped locking block groove (12) continuously increases along the extension direction of the wedge surface.

3. A plugging structure for a pressure vessel according to claim 1, wherein An extension platform (40) is added to the side of the sealing base (4). A side O-ring groove (401) is opened on the side of the extension platform (40), and a surface O-ring groove (402) is opened on the upper surface of the extension platform (40). A side O-ring (7) and a surface O-ring (8) are respectively set in the side O-ring groove (401) and the surface O-ring groove (402). The sealing base (4) also has a through hole (13) that runs through the upper and lower surfaces. A plug is also set on the upper surface of the sealing base (4) at the position corresponding to the through hole (13). Waterproof sealant is applied at the contact point between the plug and the upper surface of the sealing base (4).

4. A plugging structure for a pressure vessel according to claim 2, wherein One side of the arc-shaped locking block (5) is a first wedge surface (50) that matches the wedge surface of the arc-shaped locking block slot (12), and the other side is a second wedge surface (51). The angle between the second wedge surface (51) and the horizontal plane is larger than the angle between the first wedge surface (50) and the horizontal plane, and the angle between the second wedge surface (51) and the horizontal plane is less than 90 degrees.

5. A closure for a pressure vessel according to claim 4, wherein The side of the pressure plate (6) is in contact with the second wedge surface (51) of the arc-shaped locking block (5), and the lower surface of the pressure plate (6) has a bolt (3) mounting hole and a bolt (3) is provided. The bolt (3) passes through the bolt (3) mounting hole from bottom to top, passes through the pressure plate (6), passes through the through hole (13), passes through the sealing base (4), and is combined with the plug.

6. A plugging structure for a pressure vessel according to claim 3, wherein The surface O-ring (8) on the upper surface of the extended platform (40) contacts the lower surface of the protrusion (11) of the annular tank base (10), and the side O-ring (7) contacts the inner wall of the annular tank base (10).

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