Simple plugging structure for hydrostatic test of pressure vessel

Abstract

The utility model discloses a simple plugging structure for a hydrostatic test of a pressure vessel, which comprises a tank flange and a T-shaped base which are flexibly connected through an arc-shaped hoop with a U-shaped cross section and a strap. A first O-shaped sealing ring is mounted at the joint of the side surface of the middle part of the base and the edge to prevent radial leakage; the second O-shaped sealing ring is located on the upper surface of the edge of the base and blocks the axial gap. A wedge-shaped groove and a wedge-shaped face are arranged at the bottom of the side face of the tank flange and the extending portion of the edge of the base respectively and are matched with the wedge-shaped faces of the upper end and the lower end of the arc-shaped hoop to form a mechanical reinforcement wedge-shaped clamping structure, and centripetal pressing is achieved through contraction of a single locking screw of the hoop. The arc-shaped clamp is designed in a sectional mode and can be matched with containers of different specifications, sealing reliability and operation efficiency are remarkably improved through double sealing, wedge-shaped clamping and single-screw rapid locking, and the hydraulic test device is suitable for a hydraulic test of a pressure container in a high-pressure environment.

Description

Technical Field

[0001] The utility model relates to the field of pressure test sealing, in particular to a simple plugging structure for the hydrostatic test of a pressure vessel. Background Technique

[0002] In the scenarios of hydrostatic test and liquid storage of pressure vessels, the reliability and convenience of the plugging structure are crucial. Most traditional plugging devices rely on a large number of bolts for fastening or complex pressing structures, which have significant defects: firstly, the disassembly and assembly process is cumbersome and time-consuming, and it is necessary to adjust the torques of multiple bolts one by one. Especially in the repeated disassembly and assembly during frequent tests, it seriously affects the work efficiency; secondly, the multi-bolt locking is prone to uneven force due to uneven torques, resulting in eccentric force, causing the sealing surface to fit not tightly, and it is easy for liquid to leak from the gap under high-pressure environment. Moreover, problems such as thread wear and slipping frequently occur after multiple disassembly and assembly, further reducing the sealing performance; thirdly, the complex structure increases the manufacturing cost and maintenance difficulty, and it is difficult to adapt to pressure vessels of different specifications, with insufficient versatility.

[0003] Therefore, it has become an urgent need to develop a plugging structure with a simple structure, convenient installation, reliable sealing and strong adaptability to solve the bottleneck of the existing technology and improve the efficiency of hydrostatic test. Content of the Utility Model

[0004] The purpose of the utility model is to provide a simple plugging structure for the hydrostatic test of a pressure vessel, which solves the problems of cumbersome disassembly and assembly, low sealing reliability and poor adaptability of the traditional plugging structure.

[0005] The utility model is realized through the following technical solutions:

[0006] A simple plugging structure for the hydrostatic test of a pressure vessel includes a tank body. There is a tank flange at the bottom of the tank body. A limiting groove for an arc-shaped clamp with a "C"-shaped cross-section is opened at the bottom of the side surface of the tank flange. The tank flange contacts the base. The base is a "convex"-shaped structure with a high middle part and a low edge. The low-edge position is used as the contact surface between the tank flange and the base. There is an extension part on the upper half of the low-edge part of the base, forming a structure similar to a clamping groove with the side surface of the base. The arc-shaped clamp with a "C"-shaped cross-section is clamped in the limiting groove and the similar clamping groove to softly connect the tank flange and the base. A hoop band is arranged on the outer side surface of the arc-shaped clamp.

[0007] Furthermore, a first sealing ring installation groove is opened at the junction of the side surface of the high middle part and the edge part of the base, and a first O-shaped sealing ring is installed in the installation groove. A second sealing ring installation groove is opened on the upper surface of the edge part of the base, and a second O-shaped sealing ring is installed in the groove.

[0008] Furthermore, the opening in the middle of the tank flange is just large enough to accommodate the high part of the base in the middle, and a first wedge-shaped groove is opened at the bottom of the side of the tank flange. The bottom of the first wedge-shaped groove is a wedge-shaped surface, which forms an angle with the horizontal plane below the horizontal plane.

[0009] Furthermore, the lower surface of the base edge extension is a wedge-shaped surface, and the bottom edge extension becomes thinner closer to the edge.

[0010] Furthermore, the arc-shaped clamps are provided in two or more, and the lower surface of the upper end of the arc-shaped clamps is a wedge-shaped surface that matches the wedge-shaped surface on the first wedge-shaped groove. The upper surface of the upper end of the arc-shaped clamps is a wedge-shaped surface that matches the wedge-shaped surface of the edge extension of the base. There is a distance between each pair of arc-shaped clamps.

[0011] Furthermore, the tank body coincides with the central axis of the bottom.

[0012] Furthermore, the band has screw holes at both ends for locking screws to pass through, and the band is fixed with a single locking screw.

[0013] The beneficial effects of this utility model are:

[0014] 1. Dual-sealing design enhances sealing reliability: By placing a first O-ring and a second O-ring at different locations where the base contacts the tank flange, a dual sealing barrier is formed. The first O-ring prevents liquid leakage along the radial gap between the tank sidewall and the base, while the second O-ring seals the axial gap at the flange contact surface, covering possible leakage paths. This design is particularly suitable for high-pressure hydrostatic testing environments, significantly improving sealing performance.

[0015] 2. Wedge-shaped clamping structure enhances clamping efficiency and stability: The first wedge-shaped groove of the tank flange, the wedge-shaped surface of the base edge extension, and the upper and lower wedge-shaped surfaces of the arc-shaped clamp fit together to form a mechanically amplifying wedge-shaped clamping structure. When the clamp contracts, the arc-shaped clamp generates centripetal pressure along the wedge-shaped surface, achieving a tight fit between the base and the tank flange with a relatively small locking force. The force-amplifying effect of the inclined surface enhances the clamping strength, while the guiding effect of the wedge-shaped surface ensures installation positioning accuracy and avoids sealing failure caused by eccentricity.

[0016] 3. Symmetrical structure and segmented design, strong adaptability: The central axis of the tank body and the base coincides, ensuring symmetrical force distribution, avoiding local stress concentration, and improving structural stability; the arc-shaped clamp adopts a segmented (two or more) design, which can be adjusted according to the tank size to adapt to pressure vessels of different specifications, enhancing the versatility and flexibility of the device.

[0017] 4. Simplified installation process and improved operation efficiency: The two ends of the clamp are fixed by a single locking screw, replacing the traditional multi-bolt fastening method, which greatly reduces the disassembly and assembly time, avoids the force deviation caused by uneven torque of multiple bolts, and ensures uniform contraction of the clamp and synchronous clamping of the arc-shaped clamp. It is especially suitable for water pressure test scenarios that require multiple disassembly and assembly. The operation is simple and the sealing consistency is high. Attached Figure Description

[0018] 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:

[0019] Figure 1 This is a schematic diagram of the axial cross-sectional structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the radial cross-section structure of this utility model;

[0021] Figure 3 for Figure 1 Enlarged diagram of point A in the middle.

[0022] The attached diagram shows the markings and corresponding component names:

[0023] 1-Tank body, 10-Tank body flange, 2-First O-ring seal, 3-Second O-ring seal, 4-Clamp, 5-Arc-shaped clamp, 6-Base, 61-First O-ring seal mounting groove, 62-Second O-ring seal mounting groove, 63-Extension, 7-Locking screw. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0025] 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.

[0026] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "provided with", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. Embodiment

[0027] See Figures 1 to 3 :

[0028] A simple plugging structure for a water pressure test of a pressure vessel. There is a tank flange 10 at the bottom of the tank body 1. A limiting groove for an arc-shaped clamp 5 with a "C"-shaped cross-section is opened at the bottom side of the tank flange 10. The tank flange 10 contacts the base 6. The base 6 is a "convex"-shaped structure with a higher middle part and a lower edge. The lower part of the edge is used as the contact surface where the tank flange 10 and the base 6 contact. There is an extension part 63 on the upper half of the lower part of the edge of the base 6, forming a structure similar to a clamping groove with the side of the base 6. The arc-shaped clamp 5 with a "C"-shaped cross-section is clamped in the limiting groove and the similar clamping groove to softly connect the tank flange 10 and the base 6. A hoop 4 is arranged on the outer side of the arc-shaped clamp 5.

[0029] Furthermore, a first sealing ring installation groove 61 is opened at the junction of the side of the higher middle part and the edge part of the base 6, and a first O-ring 2 is installed in the installation groove. A second sealing ring installation groove 62 is opened on the upper surface of the edge part of the base 6, and a second O-ring 3 is installed in the groove.

[0030] By arranging the first O-ring 2 and the second O-ring 3 at different positions where the base 6 contacts the tank body 1, a double sealing barrier is formed. The double sealing can effectively prevent the liquid from leaking along the radial gap between the side wall of the tank body 1 and the base 6, and seal the axial gap of the flange contact surface. The combination of the two covers the possible leakage paths, significantly improving the sealing reliability, especially suitable for water pressure tests in high-pressure environments.

[0031] Furthermore, the middle opening of the tank flange 10 can just accommodate the higher middle part of the base 6. A first wedge-shaped groove is opened at the bottom side of the tank flange 10. The bottom of the first wedge-shaped groove is a wedge surface, forming an angle below the horizontal plane with the horizontal plane.

[0032] The angle formed by the wedge surface and the horizontal plane is below the horizontal plane, indicating that the wedge surface makes the first wedge-shaped groove wider at the outer part, making it easier to enter the first wedge-shaped groove.

[0033] Furthermore, the lower surface of the edge extension 63 of the base 6 is a wedge-shaped surface, and the bottom edge extension 63 becomes thinner closer to the edge.

[0034] The thinner the bottom edge extension 63 is closer to the edge, the more it indicates that the wedge-shaped surface of the lower surface of the extension 63 extends from the outside of the extension 63 to the inside, and the wedge-shaped surface is higher near the outside of the extension 63 and lower near the inside of the extension 63.

[0035] Furthermore, there are two or more arc-shaped clamps 5, and the lower surface of the upper end of the arc-shaped clamp 5 is a wedge-shaped surface that matches the wedge-shaped surface on the first wedge-shaped groove. The upper surface of the upper end of the arc-shaped clamp 5 is a wedge-shaped surface that matches the wedge-shaped surface of the edge extension 63 of the base 6. There is a distance between each pair of arc-shaped clamps 5.

[0036] The bottom wedge-shaped surface of the first wedge groove of the tank flange 10 forms an angle with the horizontal plane, and the wedge-shaped surface of the lower surface of the edge extension 63 of the base 6 matches the wedge-shaped surfaces at the upper and lower ends of the arc-shaped clamp 5, forming a wedge-shaped clamping structure. When the clamp 4 contracts, the arc-shaped clamp 5 generates centripetal pressure along the wedge-shaped surface, tightly fitting the base 6 and the tank flange 10. Utilizing the mechanical force amplification effect of the inclined surface, high-strength clamping is achieved with a relatively small locking force. At the same time, the guiding effect of the wedge-shaped surface ensures the positioning accuracy during installation and avoids sealing failure caused by eccentricity.

[0037] Furthermore, the tank body 1 coincides with the central axis of the bottom.

[0038] The central axis of the tank body 1 and the base 6 are aligned to ensure that the entire sealing structure is symmetrically stressed, avoid local stress concentration caused by eccentric load, and improve structural stability and sealing reliability. The arc-shaped clamp 5 adopts a segmented (two or more) design, and the number can be adjusted according to the size of the tank body 1 to adapt to pressure vessels of different specifications, thereby enhancing the versatility and flexibility of the device.

[0039] Furthermore, the band 4 has screw holes at both ends for the locking screws 7 to pass through, and the band 4 is fixed with a single locking screw 7.

[0040] The clamp 4 is secured at both ends with a single locking screw 7, replacing the traditional multi-bolt fastening method, which greatly simplifies the installation process and reduces disassembly and assembly time. The single screw locking avoids the force deviation caused by uneven torque of multiple bolts, ensuring that the clamp 4 contracts evenly, thereby enabling the arc-shaped clamp 5 to clamp synchronously and concentrically, improving operating efficiency and sealing consistency, and is especially suitable for water pressure test scenarios with multiple disassembly and assembly.

[0041] The method of using this utility model is as follows:

[0042] In use, first contact the base 6 with the tank flange 10. Since the middle opening of the tank flange 10 can just accommodate the high part in the middle of the base 6, the two are initially positioned, and the central axes of the tank 1 and the base 6 coincide, ensuring symmetric force application.

[0043] Next, two or more arc-shaped clamps 5 with a "匚"-shaped cross-section are respectively clamped in the limiting grooves at the bottom side of the tank flange 10 and the quasi-groove formed by the upper half extension 63 of the lower part of the edge of the base 6 and the side of the base 6. The wedge-shaped surface on the lower surface of the upper end of the arc-shaped clamp 5 fits with the wedge-shaped surface of the first wedge-shaped groove of the tank flange 10, and the wedge-shaped surface on the upper surface of the upper end fits with the wedge-shaped surface on the lower surface of the edge extension 63 of the base 6.

[0044] Then, the strap 4 is fixed with locking screws 7 through the screw holes at both ends of the strap 4. When the strap 4 contracts, due to the fitting relationship between the arc-shaped clamp 5 and the wedge-shaped surface, the arc-shaped clamp 5 generates a centripetal pressure along the wedge-shaped surface, tightly fitting the base 6 and the tank flange 10. With the mechanical force amplification effect of the inclined plane, high-strength clamping is achieved with a small locking force. At the same time, the first O-ring seal 2 in the first seal ring installation groove 61 at the junction of the high part side and the edge part of the base 6, and the second O-ring seal 3 in the second seal ring installation groove 62 on the upper surface of the edge part of the base 6 form a sealing barrier for double radial sealing and end face sealing, effectively preventing liquid from leaking along the radial gap between the side wall of the tank 1 and the base 6 and the axial gap of the flange contact surface, thus completing the water pressure test plugging of the pressure vessel. This structure is easy to install, has reliable sealing, and can also adapt to different specifications of pressure vessels by adjusting the number of arc-shaped clamps 5.

[0045] The specific embodiments described above have further elaborated on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A simple sealing structure for hydrostatic testing of pressure vessels, characterized in that, It includes a tank body (1). There is a tank flange (10) at the bottom of the tank body (1). A limiting groove for an arc-shaped clamp (5) with a "C"-shaped cross-section is provided at the bottom side of the tank flange (10). The tank flange (10) contacts the base (6). The base (6) has a "convex"-shaped structure with a higher middle part and a lower edge. The lower part of the edge is used as the contact surface where the tank flange (10) and the base (6) contact. There is an extension part (63) on the upper half of the lower part of the edge of the base (6), forming a structure similar to a clamping groove with the side of the base (6). The arc-shaped clamp (5) with a "C"-shaped cross-section is clamped in the limiting groove and the similar clamping groove to softly connect the tank flange (10) and the base (6). A hoop band (4) is arranged on the outer side surface of the arc-shaped clamp (5).

2. The simple plugging structure for water pressure test of a pressure vessel according to claim 1, characterized in that, A first sealing ring installation groove (61) is provided at the junction of the side surface of the higher middle part and the edge part of the base (6), and a first O-ring (2) is installed in the installation groove. A second sealing ring installation groove (62) is provided on the upper surface of the edge part of the base (6), and a second O-ring (3) is installed in the groove.

3. The simple plugging structure for water pressure test of a pressure vessel according to claim 2, characterized in that, The middle opening of the tank flange (10) can just accommodate the higher middle part of the base (6). A first wedge-shaped groove is provided at the bottom side of the tank flange (10). The bottom of the first wedge-shaped groove is a wedge surface, forming an angle below the horizontal plane with the horizontal plane.

4. The simple plugging structure for water pressure test of a pressure vessel according to claim 2, characterized in that, The lower surface of the edge extension part (63) of the base (6) is a wedge surface, and the bottom edge extension part (63) is thinner towards the edge.

5. The simple plugging structure for water pressure test of a pressure vessel according to claim 3, characterized in that, Two or more arc-shaped clamps (5) are provided. The lower surface of the upper end of the arc-shaped clamp (5) is a wedge surface that fits with the wedge surface on the first wedge-shaped groove. The upper surface of the upper end of the arc-shaped clamp (5) is a wedge surface that fits with the wedge surface of the edge extension part (63) of the base (6). There is a distance between two adjacent arc-shaped clamps (5).

6. The simple plugging structure for water pressure test of a pressure vessel according to claim 1, characterized in that, The axis of the tank body (1) coincides with the bottom center line.

7. The simple plugging structure for water pressure test of a pressure vessel according to claim 1, characterized in that, Screw holes for a locking screw (7) to pass through are provided at both ends of the hoop band (4), and the hoop band (4) is fixed with a single locking screw (7).

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