Pressure vessel sealing performance testing equipment

Abstract

The present invention relates to the technical field of sealing detection, and discloses a pressure vessel sealing performance detection device, including a frame, a fixed plate, two clamping assemblies, a pressing mechanism, a load-bearing swivel and a load-bearing lifting ring; when the load-bearing lifting ring carries a pressure vessel, it can slide down until it fits the load-bearing swivel, and two first hydraulic assemblies are installed at the bottom end of the load-bearing swivel, and the two first hydraulic assemblies are respectively connected to two clamping assemblies, and when the load-bearing lifting ring slides down to fit with the load-bearing swivel, the first hydraulic assembly drives the two clamping assemblies to clamp together on the outside of the pressure vessel. The load-bearing lifting ring provided in the present invention can, after carrying the pressure vessel, use the weight of the pressure vessel to generate longitudinal deformation so as to pressurize the first hydraulic assembly, and then drive the clamping assembly to roll on the outside of the pressure vessel through the first hydraulic assembly, so that the pressure vessel can be automatically clamped without additional electrical equipment when the pressure vessel is placed.

Description

Technical Field

[0001] The invention relates to the technical field of sealing performance detection, and in particular to a pressure vessel sealing performance detection device. Background Art

[0002] A pressure vessel refers to a closed device used to contain gas or liquid and bear a certain pressure. Among them, the reactor is a pressure vessel frequently used in industrial production. Since the size of this type of sealed container is much larger than that of common pressure vessels, and there may be multiple leakage points on a large sealed container, when conducting airtightness testing on such large pressure vessels, if the traditional watertight method is used, a machine with a larger space is required, which greatly increases the production cost.

[0003] In the prior art, for example, the patent with authorization announcement number CN117516839B proposes a pressure vessel sealing detection device, including a driving assembly, a side support assembly is arranged on the driving assembly, a lower support assembly, a transmission assembly and an upper support assembly are arranged on the support assembly, and an inflation assembly is arranged on the upper support assembly. The sliding block is controlled to slide by a long rod, thereby automatically driving the inflation interface to engage with the access port of the pressure vessel, and the horizontal long rod is pushed to move by the push shaft, and the sliding shaft is controlled to push the contact plate to fit the base through the fitting spring, so that the elastic force of the fitting spring is used to make the base and the pressure vessel fit tightly, and the contact wheel on the middle push rod is pushed to move closer to the pressure vessel by the rotation of the rotating rod, so that the three contact wheels on one side are all fitted to the outer wall of the pressure vessel to support and fix the pressure vessel.

[0004] However, the above-mentioned existing technology still has limitations in actual use. The above-mentioned technical solution requires that the pressure vessel be placed on the device first, and then the corresponding structure is driven by an additionally installed power device to close the bottom of the pressure vessel. After that, the corresponding structure needs to be driven by the power device to clamp the outside of the pressure vessel. The method of clamping and fixing the pressure vessel is relatively cumbersome and time-consuming. During the time period from the placement of the pressure vessel to the clamping, the pressure vessel may fall due to shaking, resulting in a low safety factor. Summary of the invention

[0005] The purpose of the present invention is to provide a pressure vessel sealing performance testing device to solve the problem that the method of clamping and fixing the pressure vessel in the prior art is relatively cumbersome and time-consuming.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] The pressure vessel sealing performance testing equipment comprises a frame, the frame is connected with a fixed plate, two clamping assemblies and a pressing mechanism, the fixed plate is rotatably connected with a load-bearing swivel, the upper part of the load-bearing swivel is connected with a load-bearing lifting ring for bearing the pressure vessel, the pressing mechanism is pressed on the top of the pressure vessel to cooperate with the fixed plate for fixing, and the two clamping assemblies are symmetrically distributed about the fixed plate and are used to clamp the outer side of the pressure vessel together;

[0008] When the load-bearing lifting ring carries a pressure vessel, it can slide down until it fits the load-bearing rotating ring. Two first hydraulic components are installed at the bottom end of the load-bearing rotating ring. The two first hydraulic components are respectively connected to the two clamping components. When the load-bearing lifting ring slides down until it fits the load-bearing rotating ring, the first hydraulic component drives the two clamping components to clamp together on the outside of the pressure vessel.

[0009] The fixing plate is provided with a second hydraulic assembly and a third hydraulic assembly, wherein the second hydraulic assembly is used for engaging the load-bearing rotating ring to fix the position of the pressure vessel, and the third hydraulic assembly is used for locking the load-bearing lifting ring to keep the pressure vessel at the lowest position at all times.

[0010] As a preferred solution of the present invention, a positioning hole is provided at the top of the fixing plate, a first through hole is provided at the bottom of the fixing plate, the positioning hole and the central axis of the first through hole coincide and are connected, two fastener grooves are provided on the inner wall of the positioning hole, both of the two fastener grooves are used to connect the third hydraulic component, a clamping groove is provided on the inner wall of the first through hole, the clamping groove is used to connect the second hydraulic component, a pressure relief hole for connecting the second hydraulic component and the third hydraulic component is provided in the fixing plate, a blocking rod for blocking the pressure relief hole is telescopically connected in the pressure relief hole, two mounting brackets are provided at the bottom end outlets of the two pressure relief holes respectively, and the first electric push rods for connecting the corresponding bottom ends of the blocking rods are installed on the two mounting brackets;

[0011] The load-bearing rotating ring is rotatably connected to the inner sides of the positioning hole and the first through hole. When the load-bearing lifting ring is in contact with the load-bearing rotating ring, the load-bearing lifting ring is located on the inner side of the positioning hole.

[0012] As a preferred solution of the present invention, a transfer circular groove which is sleeved in the first through hole is provided on the outer circumferential surface of the load-bearing swivel, and an annular clamping tooth distributed around the transfer circular groove is provided on the transfer circular groove. Two countersunk holes are provided on the upper surface of the load-bearing swivel, and a second through hole which passes longitudinally through the load-bearing swivel is provided in the central area of ​​the two countersunk holes, and springs for elastically supporting the load-bearing lifting ring are provided in the two second through holes.

[0013] As a preferred solution of the present invention, the third hydraulic assembly includes a first hydraulic chamber opened in the fixed plate, a first piston is slidably connected inside the first hydraulic chamber, a third electric push rod connected to the first piston is installed on the outer side of the fixed plate, a first pressure relief chamber connected to the pressure relief hole is opened at one end of the first hydraulic chamber, two second hydraulic chambers symmetrically distributed about the positioning hole are opened at one end of the first pressure relief chamber, the ends of the two second hydraulic chambers are respectively connected to the two fastener grooves, the two second hydraulic chambers are slidably connected with buckling blocks, the ends of the two buckling blocks pass through the corresponding fastener grooves and extend into the positioning hole, and the sliding directions of the two buckling blocks are directly opposite to the center of the positioning hole;

[0014] The front end of the buckling block is hemispherical, the lower outer edge of the load-bearing lifting ring is provided with an inclined surface in contact with the buckling block, and the outer circumferential surface of the load-bearing lifting ring is provided with a buckling ring groove for the buckling block to extend into.

[0015] As a preferred solution of the present invention, the second hydraulic assembly includes a third hydraulic chamber and a fourth hydraulic chamber opened in the fixed plate, the third hydraulic chamber and the fourth hydraulic chamber are connected by a second pressure relief chamber, the second pressure relief chamber is connected to the pressure relief hole, the fourth hydraulic chamber is connected to the clamping groove, a second piston is slidably connected in the third hydraulic chamber, a second electric push rod connected to the second piston is installed on the outer side of the fixed plate, a clamping block is slidably connected in the fourth hydraulic chamber, an end of the clamping block can pass through the clamping groove and extend to the inner side of the first through hole, and the end of the clamping block can be clamped with any position on the annular clamping tooth.

[0016] As a preferred solution of the present invention, there is a gap between the blocking rod and the pressure relief hole, and the outer side of the blocking rod is sleeved with a first sealing ring, a second sealing ring and a third sealing ring which are interference fit with the pressure relief hole;

[0017] When the blocking rod is at an initial height position, the first sealing ring is located in the pressure relief hole on one side of the first pressure relief chamber, the second sealing ring is located in the pressure relief hole between the first pressure relief chamber and the second pressure relief chamber, and the third sealing ring is located in the pressure relief hole on one side of the second pressure relief chamber;

[0018] When the first electric push rod drives the blocking rod to descend, the first sealing ring is located in the first pressure relief chamber, the second sealing ring is located in the second pressure relief chamber, and the third sealing ring is located outside the pressure relief hole.

[0019] As a preferred solution of the present invention, the clamping assembly includes a connecting seat longitudinally slidably connected to the frame, and two movable arms symmetrically distributed about the connecting seat are rotatably connected to the connecting seat, and the ends of the two movable arms are rotatably connected to rubber rollers for rolling the pressure container, and a hinge assembly is provided between the two movable arms. The connecting seat is provided with a central mounting hole for installing the first hydraulic assembly, and the central mounting hole is located between the two movable arms.

[0020] As a preferred solution of the present invention, the hinge assembly includes two transfer rods rotatably connected to the two movable arms respectively, the ends of the two transfer rods are jointly sleeved with a connecting shaft, and the connecting shaft is provided with a connecting frame for connecting the hinge assembly.

[0021] As a preferred solution of the present invention, the first hydraulic assembly includes a first sealing tube fixedly connected to the bottom end of the load-bearing swivel, a third piston is slidably connected inside the first sealing tube, a connecting rod is provided at the top end of the third piston, the top end of the connecting rod passes through the third piston, the second through hole, the countersunk hole and the spring in sequence and is connected to the bottom end of the load-bearing lifting ring, the bottom end of the first sealing tube is connected to the second sealing tube through a hose, the second sealing tube is connected to the corresponding center mounting hole, a fourth piston is slidably connected inside the second sealing tube, and one end of the fourth piston is provided with a push-pull rod that passes through the second sealing tube and is connected to the connecting frame.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) After the load-bearing lifting ring of the present invention carries the pressure vessel, it can utilize the weight of the pressure vessel to generate longitudinal deformation so as to increase the pressure of the first hydraulic component, and then drive the clamping component to roll on the outside of the pressure vessel through the first hydraulic component. When the pressure vessel is placed, it can be automatically clamped without the use of additional electrical equipment, thereby effectively improving the safety factor of placing the pressure vessel.

[0024] (2) The present invention also arranges the second hydraulic component and the third hydraulic component in the fixed plate. The third hydraulic component can make the load-bearing lifting ring of the pressure vessel always be in the lowest position, ensuring that the two clamping components can always be fully clamped on the outside of the pressure vessel. The second hydraulic component can lock the load-bearing rotating ring so that it cannot rotate, and the load-bearing lifting ring and the pressure vessel will not rotate, which is convenient for testing the pressure vessel.

[0025] (3) The present invention further provides a pressure relief structure in the fixed plate. When the second hydraulic assembly and the third hydraulic assembly fail to relieve pressure, the pressure relief structure provided in the fixed plate can be used to relieve pressure on the second hydraulic assembly and the third hydraulic assembly at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0027] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the fixing plate of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the third hydraulic assembly of the present invention inside the fixed plate;

[0030] Figure 4 It is a schematic diagram of the structure of the second hydraulic assembly inside the fixed plate of the present invention;

[0031] Figure 5 It is a schematic diagram of the connection structure of the fixed plate, the load-bearing rotating ring and the load-bearing lifting ring of the present invention;

[0032] Figure 6 for Figure 5 Sectional view at A in the middle;

[0033] Figure 7 for Figure 5 Sectional view at B in the middle;

[0034] Figure 8 is a cross-sectional view of a first hydraulic assembly of the present invention;

[0035] Fig. 9 It is a schematic structural diagram of the clamping assembly of the present invention.

[0036] Reference numerals:

[0037] 1. Frame; 2. Fixed plate; 3. Clamping assembly; 4. Pressing mechanism; 5. Load-bearing swivel; 6. Load-bearing lifting ring; 7. First hydraulic assembly; 8. Second hydraulic assembly; 9. Third hydraulic assembly;

[0038] 21. Positioning hole; 22. First through hole; 23. Fastener slot; 24. Card slot; 25. Pressure relief hole; 26. Blocking rod; 27. Mounting frame; 28. First electric push rod;

[0039] 261, first sealing ring; 262, second sealing ring; 263, third sealing ring;

[0040] 31. Connecting seat; 32. Movable arm; 33. Rubber roller; 34. Articulated assembly; 35. Center mounting hole;

[0041] 341, transfer rod; 342, connecting shaft; 343, connecting frame;

[0042] 51. Transfer circular groove; 52. Annular latching tooth; 53. Countersunk hole; 54. Second through hole; 55. Spring;

[0043] 61. Buckle ring groove;

[0044] 71. first sealing tube; 72. third piston; 73. connecting rod; 74. second sealing tube; 75. fourth piston; 76. push-pull rod;

[0045] 81. third hydraulic chamber; 82. fourth hydraulic chamber; 83. second pressure relief chamber; 84. second piston; 85. second electric push rod; 86. engaging block;

[0046] 91. First hydraulic chamber; 92. First piston; 93. Third electric push rod; 94. First pressure relief chamber; 95. Second hydraulic chamber; 96. Snap-fit ​​block. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0048] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0049] Combine the following Figures 1 to 9 As shown, an embodiment of the present invention provides a pressure vessel sealing performance testing device, including a frame 1, a fixed plate 2, two clamping assemblies 3 and a pressing mechanism 4 are connected to the frame 1, a load-bearing swivel 5 is rotatably connected to the fixed plate 2, a load-bearing lifting ring 6 for bearing the pressure vessel is connected above the load-bearing swivel 5, the pressing mechanism 4 is pressed on the top of the pressure vessel to cooperate with the fixed plate 2 to fix, and the two clamping assemblies 3 are symmetrically distributed about the fixed plate 2 and are used to clamp the outer side of the pressure vessel together;

[0050] When the load-bearing lifting ring 6 carries the pressure vessel, it can slide down until it fits the load-bearing rotating ring 5. Two first hydraulic components 7 are installed at the bottom end of the load-bearing rotating ring 5. The two first hydraulic components 7 are respectively connected to the two clamping components 3. When the load-bearing lifting ring 6 slides down to fit the load-bearing rotating ring 5, the first hydraulic component 7 drives the two clamping components 3 to clamp together on the outside of the pressure vessel.

[0051] The fixing plate 2 is provided with a second hydraulic assembly 8 and a third hydraulic assembly 9. The second hydraulic assembly 8 is used to engage the bearing swivel 5 to fix the position of the pressure vessel, and the third hydraulic assembly 9 is used to lock the bearing lifting ring 6 to keep the pressure vessel at the lowest position at all times.

[0052] The load-bearing lifting ring 6 provided in the present invention can, after carrying the pressure vessel, use the weight of the pressure vessel to generate longitudinal deformation to increase the pressure of the first hydraulic component 7, and then drive the clamping component 3 to roll on the outside of the pressure vessel to fix it through the first hydraulic component 7. When the pressure vessel is placed, it can be automatically clamped without additional electrical equipment, which effectively improves the safety factor of placing the pressure vessel. In addition, after the sealing test of the pressure vessel is completed, the height of the load-bearing lifting ring 6 is reset by vertically lifting the pressure vessel. At this time, the pressure of the first hydraulic component 7 drops to the initial pressure, so that the clamping component 3 clamped on the outside of the pressure vessel is released, and the pressure vessel can be removed from any direction.

[0053] The present invention further arranges the second hydraulic component 8 and the third hydraulic component 9 in the fixed plate 2. The third hydraulic component 9 can make the load-bearing lifting ring 6 that supports the pressure vessel always be in the lowest position, so that the two clamping components 3 can always be fully clamped on the outside of the pressure vessel. The second hydraulic component 8 can lock the load-bearing swivel 5 so that it cannot rotate, and the load-bearing lifting ring 6 and the pressure vessel will not rotate, which is convenient for detecting the pressure vessel.

[0054] The present invention further provides a pressure relief structure in the fixed plate 2 , and when the second hydraulic assembly 8 and the third hydraulic assembly 9 fail and cannot relieve pressure, the pressure relief structure provided in the fixed plate 2 can be used to relieve pressure on the second hydraulic assembly 8 and the third hydraulic assembly 9 at the same time.

[0055] It is worth noting that this embodiment is suitable for can-shaped pressure vessels. The air inlet, pressure gauge and other structures of this type of pressure vessel are generally arranged at both ends. Therefore, in this embodiment, the load-bearing lifting ring 6 for bearing the pressure vessel and the pressing mechanism 4 for pressing down the end of the pressure vessel are both designed as annular structures, such as Figure 1 As shown, the load-bearing lifting ring 6 and the pressing mechanism 4 are in contact with the outer edge areas at both ends of the pressure vessel, thereby protecting the structure set in the central area at both ends of the pressure vessel (the pressing mechanism 4 is a conventional structure that can achieve downward pressing, which is a conventional technical means in this field and will not be elaborated here).

[0056] Among them, a positioning hole 21 is provided at the top of the fixed plate 2, and a first through hole 22 is provided at the bottom end of the fixed plate 2. The central axes of the positioning hole 21 and the first through hole 22 coincide with and are connected. Two fastener grooves 23 are provided on the inner wall of the positioning hole 21, and the two fastener grooves 23 are both used to connect the third hydraulic component 9. A clamping groove 24 is provided on the inner wall of the first through hole 22, and the clamping groove 24 is used to connect the second hydraulic component 8. A pressure relief hole 25 for connecting the second hydraulic component 8 and the third hydraulic component 9 is provided in the fixed plate 2, and a blocking rod 26 for blocking the pressure relief hole 25 is telescopically connected in the pressure relief hole 25. Two mounting frames 27 are provided at the bottom end of the fixed plate 2, which are respectively located at the bottom outlets of the two pressure relief holes 25, and the two mounting frames 27 are both installed with a first electric push rod 28 for connecting the bottom end of the corresponding blocking rod 26;

[0057] The load-bearing swivel 5 is rotatably connected to the inner sides of the positioning hole 21 and the first through hole 22 . When the load-bearing lifting ring 6 is in contact with the load-bearing swivel 5 , the load-bearing lifting ring 6 is located at the inner side of the positioning hole 21 .

[0058] A transfer circular groove 51 is provided on the outer circumferential surface of the load-bearing swivel 5 and is sleeved in the first through hole 22. An annular latching tooth 52 is provided on the transfer circular groove 51 and is distributed around the transfer circular groove 51. Two countersunk holes 53 are provided on the upper surface of the load-bearing swivel 5. The central areas of the two countersunk holes 53 are provided with second through holes 54 that longitudinally pass through the load-bearing swivel 5. The two second through holes 54 are provided with springs 55 for elastically supporting the load-bearing lifting ring 6.

[0059] Specifically, in the initial state of the load-bearing lifting ring 6 without carrying any object, the bottom end of the load-bearing lifting ring 6 is elastically supported by two springs 55, so that the distance between the load-bearing lifting ring 6 and the load-bearing swivel 5 is maximized. At this time, the load-bearing lifting ring 6 is located above the fixed plate 2. When the pressure vessel is placed on the load-bearing lifting ring 6, the load-bearing lifting ring 6 is subjected to the pressure of the weight of the pressure vessel above, thereby descending and compressing the spring 55 at the same time, until the load-bearing lifting ring 6 descends into the positioning hole 21 so that the spring 55 is completely located in the countersunk hole 53, and at this time the upper surface of the load-bearing lifting ring 6 is flush with the upper surface of the fixed plate 2, which is the lowest height of the load-bearing lifting ring 6 (at this time, the load-bearing lifting ring 6 is restricted by the third hydraulic component 9, so that the load-bearing lifting ring 6 is always at the lowest height). At this time, the load-bearing lifting ring 6 is in contact with the load-bearing swivel 5, and the height of the load-bearing swivel 5 on the fixed plate 2 cannot be raised or lowered, so the weight of the pressure vessel will directly act on the fixed plate 2 to complete the support.

[0060] When the pressure vessel moves vertically upward, if the third hydraulic component 9 no longer restricts the load-bearing lifting ring 6, the elastic force can be released by the spring 55 to increase the height of the load-bearing lifting ring 6 until it reaches the initial height of the load-bearing lifting ring 6. As the height of the load-bearing lifting ring 6 increases, the pressures of the two first hydraulic components 7 decrease synchronously, so that the strength of the two clamping components 3 clamping the pressure vessel gradually decreases, until the load-bearing lifting ring 6 is in the highest position, and the two clamping components 3 are completely loosened and no longer contact the pressure vessel.

[0061] Among them, the third hydraulic assembly 9 includes a first hydraulic chamber 91 opened in the fixed plate 2, a first piston 92 is slidably connected inside the first hydraulic chamber 91, a third electric push rod 93 connected to the first piston 92 is installed on the outer side of the fixed plate 2, a first pressure relief chamber 94 connected to the pressure relief hole 25 is opened at one end of the first hydraulic chamber 91, two second hydraulic chambers 95 symmetrically distributed about the positioning hole 21 are opened at one end of the first pressure relief chamber 94, the ends of the two second hydraulic chambers 95 are respectively connected to the two fastener grooves 23, and the two second hydraulic chambers 95 are slidably connected with buckling blocks 96, the ends of the two buckling blocks 96 pass through the corresponding fastener grooves 23 and extend into the positioning hole 21, and the sliding directions of the two buckling blocks 96 are both directly opposite to the center of the positioning hole 21;

[0062] The front end of the buckle block 96 is hemispherical, the lower outer edge of the load-bearing lifting ring 6 is provided with an inclined surface in contact with the buckle block 96, and the outer circumferential surface of the load-bearing lifting ring 6 is provided with a buckle ring groove 61 for the buckle block 96 to extend into.

[0063] Specifically, the third hydraulic assembly 9 locks the load-bearing lifting ring 6 to the lowest height position by extending two snap-fit ​​blocks 96 into the snap-fit ​​ring groove 61 on the outer circumferential surface of the load-bearing lifting ring 6. When it is necessary to release the locking height effect of the two snap-fit ​​blocks 96 on the load-bearing lifting ring 6, the output end of the third electric push rod 93 is controlled to retract and move together with the first piston 92 in the first hydraulic chamber 91. As the first piston 92 moves under the action of pressure, the two snap-fit ​​blocks 96 retract into the corresponding second hydraulic chamber 95 until the snap-fit ​​blocks 96 are completely retracted into the corresponding second hydraulic chamber 95. At this time, the load-bearing lifting ring 6 can rise.

[0064] Furthermore, if the two snap-fitting blocks 96 are to be automatically extended into the snap-fitting ring groove 61 during the process of the load-bearing lifting ring 6 descending to fit the load-bearing rotating ring 5, it is necessary to control the initial position of the first piston 92 in the first hydraulic chamber 91, and it is necessary to ensure that the two snap-fitting blocks 96 are in the initial position, and the front end hemispherical structures of the two snap-fitting blocks 96 are located in the positioning hole 21. As the load-bearing lifting ring 6 descends, the outer edge inclined surface of its bottom end contacts the front end hemispherical structures of the two snap-fitting blocks 96, thereby applying a lateral thrust to the two snap-fitting blocks 96, so that the two snap-fitting blocks 96 retract into the corresponding second hydraulic chamber 95 until the front end height of the two snap-fitting blocks 96 is flush with the snap-fitting ring groove 61. Under the action of the cavity pressure composed of the first hydraulic chamber 91, the first pressure relief chamber 94 and the two second hydraulic chambers 95, the two snap-fitting blocks 96 are reset and extended into the snap-fitting ring groove 61 to complete the locking of the height position of the load-bearing lifting ring 6.

[0065] Among them, the second hydraulic component 8 includes a third hydraulic chamber 81 and a fourth hydraulic chamber 82 opened in the fixed plate 2. The third hydraulic chamber 81 and the fourth hydraulic chamber 82 are connected by opening a second pressure relief chamber 83. The second pressure relief chamber 83 is connected to the pressure relief hole 25. The fourth hydraulic chamber 82 is connected to the clamping groove 24. A second piston 84 is slidably connected in the third hydraulic chamber 81. A second electric push rod 85 connected to the second piston 84 is installed on the outer side of the fixed plate 2. A locking block 86 is slidably connected in the fourth hydraulic chamber 82. The end of the locking block 86 can pass through the clamping groove 24 and extend to the inner side of the first through hole 22. The end of the locking block 86 can be engaged with any position on the annular clamping tooth 52.

[0066] Specifically, the second hydraulic component 8 controls the second piston 84 to slide in the third hydraulic chamber 81 through the output end of the second electric push rod 85, thereby controlling the locking block 86 to slide in the second pressure relief chamber 83 under the action of the hydraulic oil. When the front end of the locking block 86 extends into the first through hole 22 and engages with the annular locking tooth 52, the load-bearing swivel 5 cannot rotate at this time; if the engaging state is to be released, the output end of the second electric push rod 85 can be controlled to retract, thereby driving the locking block 86 to retract into the fourth hydraulic chamber 82 under the action of the hydraulic oil. When the front end of the locking block 86 is no longer engaged with the annular locking tooth 52, the load-bearing swivel 5 can rotate in the fixed plate 2.

[0067] There is a gap between the blocking rod 26 and the pressure relief hole 25, and the outer side of the blocking rod 26 is sleeved with a first sealing ring 261, a second sealing ring 262 and a third sealing ring 263 which are interference-fitted with the pressure relief hole 25;

[0068] When the blocking rod 26 is at the initial height position, the first sealing ring 261 is located in the pressure relief hole 25 on one side of the first pressure relief chamber 94, the second sealing ring 262 is located in the pressure relief hole 25 between the first pressure relief chamber 94 and the second pressure relief chamber 83, and the third sealing ring 263 is located in the pressure relief hole 25 on one side of the second pressure relief chamber 83;

[0069] When the first electric push rod 28 drives the blocking rod 26 to descend, the first sealing ring 261 is located in the first pressure relief chamber 94 , the second sealing ring 262 is located in the second pressure relief chamber 83 , and the third sealing ring 263 is located outside the pressure relief hole 25 .

[0070] Specifically, the pressure relief hole 25, the blocking rod 26, the mounting frame 27 and the first electric push rod 28 arranged in the fixed plate 2, and the pressure relief structure in the fixed plate 2 are composed together. Since the second hydraulic assembly 8 and the third hydraulic assembly 9 are used to limit the rotation position and the lowest height position of the bearing structure (i.e., the bearing swivel 5 and the bearing lifting ring 6), respectively, when the driving device of the second hydraulic assembly 8 or the third hydraulic assembly 9 is damaged and cannot release the engagement or limit function, the output end of the first electric push rod 28 can be controlled to retract, and the height of the blocking rod 26 can be lowered. As the blocking rod 26 descends, the first sealing ring 261 on the blocking rod 26 moves from the first relief hole 25 to the bottom of the fixed plate 2. The first electric push rod 28 is installed on the fixing plate 24 through the first and second electric push rods 26. The first electric push rod 28 is installed on the fixing plate 24 through the first and second electric push rods 26. The maximum stroke of the first and second electric push rods 26 is the space in the fixing plate 24. The second electric push rod 28 is installed on the fixing plate 24 through the first and second electric push rods 26. The maximum stroke of the first and second electric push rods 26 is the space in the fixing plate 24. The hydraulic oil flowing out of the bottom port of the pressure relief hole 25 can flow out of the fixing plate 24.

[0071] In another implementation mode, since the pressure relief structure in the fixed plate 2 is achieved by pulling the blocking rod 26 downward, and the pressure relief function is rarely used, the mounting frame 27 and the first electric push rod 28 can be removed and replaced by manually pulling the blocking rod 26, which can also achieve the same pressure relief effect.

[0072] Among them, the clamping assembly 3 includes a connecting seat 31 longitudinally slidably connected to the frame 1, and two movable arms 32 symmetrically distributed about the connecting seat 31 are rotatably connected to the connecting seat 31. The ends of the two movable arms 32 are rotatably connected to rubber rollers 33 for rolling the pressure container, and a hinge assembly 34 is provided between the two movable arms 32. A central mounting hole 35 for mounting the first hydraulic assembly 7 is opened on the connecting seat 31, and the central mounting hole 35 is located between the two movable arms 32.

[0073] The hinge assembly 34 includes two transfer rods 341 rotatably connected to the two movable arms 32 , and ends of the two transfer rods 341 are commonly sleeved with a connecting shaft 342 , on which a connecting frame 343 for connecting the hinge assembly 34 is provided.

[0074] The first hydraulic assembly 7 includes a first sealing tube 71 fixedly connected to the bottom end of the load-bearing swivel 5, a third piston 72 is slidably connected inside the first sealing tube 71, a connecting rod 73 is provided at the top end of the third piston 72, the top end of the connecting rod 73 passes through the third piston 72, the second through hole 54, the countersunk hole 53 and the spring 55 in sequence and is connected to the bottom end of the load-bearing lifting ring 6, the bottom end of the first sealing tube 71 is connected to the second sealing tube 74 through a hose, the second sealing tube 74 is connected to the corresponding center mounting hole 35, the second sealing tube 74 is slidably connected to the fourth piston 75, and one end of the fourth piston 75 is provided with a push-pull rod 76 that passes through the second sealing tube 74 and is connected to the connecting frame 343.

[0075] Specifically, during the descending process of the load-bearing lifting ring 6, the connecting rod 73 connected to the load-bearing lifting ring 6 will push the third piston 72 to descend synchronously in the first sealing tube 71, thereby continuously pushing the hydraulic oil in the first sealing tube 71 into the second sealing tube 74 through the hose. As the pressure in the second sealing tube 74 increases, the fourth piston 75 slides in the second sealing tube 74 and moves synchronously with the push-pull rod 76. As the push-pull rod 76 moves, the connecting frame 343 and the connecting shaft 342 connected to the front end of the push-pull rod 76 move synchronously, so that the inclination angle of the two transfer rods 341 sleeved on the connecting shaft 342 changes, thereby driving the two movable arms 32 to perform a clamping action until the two rubber rollers 33 connected to the front ends of the two movable arms 32 are rotated and rolled on the outside of the container with a certain pressure.

[0076] Furthermore, when the hinge assembly 34 is in the initial state, the two transfer rods 341 are in a parallel state. At this time, the distance between the ends of the two transfer rods 341 used to connect the movable arms 32 is the largest, so that the two movable arms 32 are in the maximum expanded state at this time. As the push-pull rod 76 moves laterally together with the connecting frame 343 and the connecting shaft 342, the inclination angle of the two transfer rods 341 continues to increase, so that the distance between the ends of the two transfer rods 341 used to rotate and connect the movable arms 32 gradually decreases, so that the two movable arms 32 are gradually clamped. When the load-bearing lifting ring 6 descends to the lowest height, the first hydraulic assembly 7 that provides hydraulic power for the descent of the load-bearing lifting ring 6 can drive the two clamping assemblies 3 to clamp with the maximum force.

[0077] Since the clamping force of the clamping assembly 3 is driven by the hydraulic oil in the first hydraulic assembly 7, when the load-bearing lifting ring 6 descends to the lowest position, the clamping assembly 3 will clamp on the pressure vessel with the maximum clamping force, and the total amount of liquid in the first hydraulic assembly 7 remains unchanged. Therefore, by increasing or decreasing the total amount of hydraulic oil in the first hydraulic assembly 7, the force with which the clamping assembly 3 clamps the pressure vessel can be increased or decreased when the load-bearing lifting ring 6 is in the lowest position.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pressure vessel sealing performance testing device, comprising a frame (1), characterized in that: The frame (1) is connected to a fixed plate (2), two clamping assemblies (3) and a pressing mechanism (4); a load-bearing swivel (5) is rotatably connected to the fixed plate (2); a load-bearing lifting ring (6) for bearing a pressure vessel is connected above the load-bearing swivel (5); the pressing mechanism (4) is pressed on the top of the pressure vessel to cooperate with the fixed plate (2) for fixing; the two clamping assemblies (3) are symmetrically distributed about the fixed plate (2) and are used to clamp the outer side of the pressure vessel together; When the load-bearing lifting ring (6) carries a pressure vessel, it can slide down until it fits into the load-bearing rotating ring (5); two first hydraulic components (7) are installed at the bottom end of the load-bearing rotating ring (5); the two first hydraulic components (7) are respectively connected to the two clamping components (3); when the load-bearing lifting ring (6) slides down until it fits into the load-bearing rotating ring (5), the first hydraulic component (7) drives the two clamping components (3) to clamp together on the outside of the pressure vessel; The fixing plate (2) is provided with a second hydraulic assembly (8) and a third hydraulic assembly (9), the second hydraulic assembly (8) being used to engage the load-bearing rotating ring (5) to fix the position of the pressure vessel, and the third hydraulic assembly (9) being used to lock the load-bearing lifting ring (6) to keep the pressure vessel at the lowest position at all times; A positioning hole (21) is provided at the top end of the fixing plate (2), a first through hole (22) is provided at the bottom end of the fixing plate (2), the central axes of the positioning hole (21) and the first through hole (22) coincide with and are connected, two fastener grooves (23) are provided on the inner wall of the positioning hole (21), both of the two fastener grooves (23) are used to connect the third hydraulic component (9), and a clamping groove (24) is provided on the inner wall of the first through hole (22), the clamping groove (24) is used to connect the second hydraulic component (8), a pressure relief hole (25) for connecting the second hydraulic assembly (8) and the third hydraulic assembly (9) is provided in the fixed plate (2), a blocking rod (26) for blocking the pressure relief hole (25) is telescopically connected in the pressure relief hole (25), and two mounting frames (27) are respectively located at the bottom outlets of the two pressure relief holes (25), and the two mounting frames (27) are each mounted with a first electric push rod (28) for connecting to the bottom end of the corresponding blocking rod (26); The load-bearing rotating ring (5) is rotatably connected to the inner sides of the positioning hole (21) and the first through hole (22); when the load-bearing lifting ring (6) is in contact with the load-bearing rotating ring (5), the load-bearing lifting ring (6) is located on the inner side of the positioning hole (21); The outer circumferential surface of the load-bearing rotating ring (5) is provided with a transfer circular groove (51) which is sleeved in the first through hole (22); the transfer circular groove (51) is provided with annular latching teeth (52) distributed around the transfer circular groove (51); the upper surface of the load-bearing rotating ring (5) is provided with two countersunk holes (53); the central areas of the two countersunk holes (53) are provided with second through holes (54) which longitudinally pass through the load-bearing rotating ring (5); and the two second through holes (54) are provided with springs (55) for elastically supporting the load-bearing lifting ring (6).

2. The pressure vessel sealing performance testing equipment according to claim 1, characterized in that: The third hydraulic assembly (9) comprises a first hydraulic chamber (91) opened in the fixed plate (2), a first piston (92) being slidably connected inside the first hydraulic chamber (91), a third electric push rod (93) connected to the first piston (92) being installed on the outer side of the fixed plate (2), a first pressure relief chamber (94) being connected to the pressure relief hole (25) being opened at one end of the first hydraulic chamber (91), two second hydraulic chambers (95) being symmetrically distributed about the positioning hole (21) being opened at one end of the first pressure relief chamber (94), the ends of the two second hydraulic chambers (95) being respectively connected to the two fastener grooves (23), buckling blocks (96) being slidably connected inside the two second hydraulic chambers (95), the ends of the two buckling blocks (96) both passing through the corresponding fastener grooves (23) and extending into the positioning hole (21), and the sliding directions of the two buckling blocks (96) both facing the center of the positioning hole (21); The front end of the buckling block (96) is hemispherical, the lower outer edge of the load-bearing lifting ring (6) is provided with an inclined surface in contact with the buckling block (96), and the outer circumferential surface of the load-bearing lifting ring (6) is provided with a buckling ring groove (61) for the buckling block (96) to extend into.

3. The pressure vessel sealing performance testing equipment according to claim 2, characterized in that: The second hydraulic assembly (8) comprises a third hydraulic chamber (81) and a fourth hydraulic chamber (82) which are provided in the fixed plate (2); the third hydraulic chamber (81) and the fourth hydraulic chamber (82) are connected via a second pressure relief chamber (83); the second pressure relief chamber (83) is connected to the pressure relief hole (25); the fourth hydraulic chamber (82) is connected to the clamping groove (24); a second piston (84) is slidably connected in the third hydraulic chamber (81); a second electric push rod (85) connected to the second piston (84) is mounted on the outer side of the fixed plate (2); a clamping block (86) is slidably connected in the fourth hydraulic chamber (82); an end of the clamping block (86) can pass through the clamping groove (24) and extend to the inner side of the first through hole (22); and an end of the clamping block (86) can be clamped with any position on the annular clamping tooth (52).

4. The pressure vessel sealing performance testing equipment according to claim 3 is characterized in that: There is a gap between the blocking rod (26) and the pressure relief hole (25), and the outer side of the blocking rod (26) is sleeved with a first sealing ring (261), a second sealing ring (262), and a third sealing ring (263) which are interference-fitted with the pressure relief hole (25); When the blocking rod (26) is at an initial height position, the first sealing ring (261) is located in the pressure relief hole (25) on one side of the first pressure relief chamber (94), the second sealing ring (262) is located in the pressure relief hole (25) between the first pressure relief chamber (94) and the second pressure relief chamber (83), and the third sealing ring (263) is located in the pressure relief hole (25) on one side of the second pressure relief chamber (83); When the first electric push rod (28) drives the blocking rod (26) to descend, the first sealing ring (261) is located in the first pressure relief chamber (94), the second sealing ring (262) is located in the second pressure relief chamber (83), and the third sealing ring (263) is located outside the pressure relief hole (25).

5. The pressure vessel sealing performance testing equipment according to claim 4, characterized in that: The clamping assembly (3) comprises a connecting seat (31) longitudinally slidably connected to the frame (1); two movable arms (32) symmetrically distributed about the connecting seat (31) are rotatably connected to the connecting seat (31); the ends of the two movable arms (32) are rotatably connected to rubber rollers (33) for rolling the pressure container; a hinge assembly (34) is provided between the two movable arms (32); a central mounting hole (35) for mounting the first hydraulic assembly (7) is provided on the connecting seat (31); the central mounting hole (35) is located between the two movable arms (32).

6. The pressure vessel sealing performance testing equipment according to claim 5, characterized in that: The hinge assembly (34) comprises two transfer rods (341) respectively rotatably connected to the two movable arms (32); ends of the two transfer rods (341) are commonly sleeved with a connecting shaft (342); and a connecting frame (343) for connecting the hinge assembly (34) is provided on the connecting shaft (342).

7. The pressure vessel sealing performance testing equipment according to claim 6, characterized in that: The first hydraulic assembly (7) comprises a first sealing tube (71) fixedly connected to the bottom end of the load-bearing rotating ring (5), a third piston (72) is slidably connected inside the first sealing tube (71), a connecting rod (73) is provided at the top end of the third piston (72), the top end of the connecting rod (73) passes through the third piston (72), the second through hole (54), the counterbore (53) and the spring (55) in sequence and is connected to the bottom end of the load-bearing lifting ring (6), the bottom end of the first sealing tube (71) is connected to the second sealing tube (74) through a hose, the second sealing tube (74) is connected to the corresponding central mounting hole (35), the second sealing tube (74) is slidably connected to the fourth piston (75), and one end of the fourth piston (75) is provided with a push-pull rod (76) passing through the second sealing tube (74) and connected to the connecting frame (343).

Images