A valve pressure test structure for a complete set of assembled cold boxes

Abstract

The present application discloses a valve pressure test structure for a complete cold box, which relates to the technical field of valves, including a box body, a valve arranged inside the box body, the valve including a valve stem that passes through the box body, and a pressure test mechanism. The pressure test mechanism includes a blind cover fixedly connected to the outer wall of the cold box, an opening and closing nut threadedly connected to the blind cover, the opening and closing nut rotatably connected to the valve stem, and the valve stem is passed through the blind cover. The present application drives the opening and closing nut to rotate around the axis of the valve stem through a tool such as a wrench, the opening and closing nut is threadedly connected to the blind cover, the opening and closing nut is displaced along the length direction of the valve stem, and drives the valve stem to displace along its own length direction, thereby opening the valve and facilitating pressure testing. Compared with a larger actuator, the pressure test mechanism is smaller in size and simpler in structure, which effectively reduces damage to the valve during transportation and saves the process of disassembling the actuator after the pressure test, making it more convenient.

Description

Technical Field

[0001] The present application relates to the technical field of valves, and in particular to a valve pressure testing structure for a matching complete cold box. Background Art

[0002] Traditional air separation cold boxes are primarily manufactured using a factory-made component model that is then assembled on-site. This manufacturing model is constrained by on-site construction technology, equipment, and other conditions, resulting in long installation cycles and relatively weak quality control. In recent years, the integrated manufacturing model for air separation cold boxes has gradually developed, effectively avoiding the limitations of on-site assembly space and construction technology.

[0003] The special valves that are matched with the complete cold box need to be pressure tested before leaving the factory or after being installed on the specific structure. The conventional pressure test structure requires the actuator to be installed on the outside of the complete cold box, and the actuator drives the valve installed inside the complete cold box to open for pressure testing.

[0004] However, during the transportation of the whole cold box, the actuator is installed and transported. The actuator is large in size, which makes it protrude larger from the cold box. During the transportation, the actuator is easily damaged and causes damage to the valve. Summary of the Invention

[0005] The purpose of this application is to provide a valve pressure testing structure for a complete cold box, in order to solve the problem that the conventional pressure testing structure is prone to damage to the valve during transportation.

[0006] The valve pressure test structure of the supporting integrated cold box provided in this application adopts the following technical solution:

[0007] A valve pressure testing structure for a complete cold box includes a box body, a valve arranged inside the box body, the valve including a valve stem passing through the box body, and a pressure testing mechanism. The pressure testing mechanism includes a blind cover fixedly connected to the outer wall of the cold box, an opening and closing nut threadedly connected to the blind cover, the opening and closing nut is rotatably connected to the valve stem, and the valve stem is passed through the blind cover.

[0008] By adopting the above technical solution, the actuator is replaced by a pressure test mechanism, which only includes a blind cover and an opening and closing nut. The opening and closing nut is driven to rotate around the axis of the valve stem by a wrench or other tools. The opening and closing nut is threadedly connected to the blind cover, and the opening and closing nut is displaced along the length of the valve stem, driving the valve stem to displace along its own length, thereby opening the valve and facilitating pressure testing. Compared with larger actuators, the pressure test mechanism is smaller in size and simpler in structure, which effectively reduces damage to the valve during transportation and eliminates the process of disassembling and assembling the actuator after the pressure test, making it more convenient.

[0009] Optionally, the opening and closing nut is fixedly connected to a handle, and the handle includes a connecting portion fixedly sleeved on the opening and closing nut and a rod portion fixedly connected to the connecting portion.

[0010] By adopting the above technical solution, the connecting part is fixedly sleeved on the opening and closing nut, and the connecting part is driven to rotate by holding the rod, which also drives the opening and closing nut to rotate, so that the pressure test mechanism has the effect of having its own wrench and is easy to operate.

[0011] Optionally, the connecting portion is provided with a nut groove for the opening and closing nut to be inserted into, and the nut groove and the opening and closing nut are interference fit.

[0012] By adopting the above technical solution, the nut groove and the opening and closing nut are interference-fitted, thereby achieving a fixed connection between the connecting part and the opening and closing nut, and the structure is simple.

[0013] Optionally, the blind cover is fixedly connected to a positioning ring, the connecting part is rotatably connected to a connecting ring, the connecting ring is fixedly connected to a plurality of positioning blocks at circumferential intervals, the positioning blocks are slidably connected to the positioning ring, and the connecting part is provided with a positioning structure for cooperating with the positioning blocks to limit the rotation of the opening and closing nut.

[0014] By adopting the above technical solution, when the opening and closing nut is displaced, the opening and closing nut can rotate relative to the connecting ring and drive the connecting ring to displace synchronously. The connecting ring drives the positioning block to slide on the positioning ring. After the valve is opened, the positioning structure cooperates with the positioning block to limit the rotation of the connecting part, thereby limiting the rotation of the opening and closing nut, and achieving fixation after the opening and closing nut is rotated.

[0015] At the same time, a number of positioning blocks are provided, and the positioning structure can cooperate with the corresponding positioning blocks according to the rotation angle of the opening and closing nut to achieve multiple angle fixation of the opening and closing nut.

[0016] Optionally, the positioning ring is provided with a dovetail groove along the circumference, which corresponds to the positioning block one-to-one and is for the positioning block to be snapped into, and the positioning block is a dovetail block that cooperates with the dovetail groove.

[0017] By adopting the above technical solution, the cooperation between the dovetail block and the dovetail groove plays a guiding and limiting role in the slip of the positioning block, which can effectively eliminate the situation where the connecting ring rotates due to the influence of the rotation of the opening and closing nut, and improve the stability of the slip of the positioning block and the displacement of the connecting ring.

[0018] Optionally, the positioning structure includes a fixed block corresponding to the positioning block one by one, a fixed sleeve rotatably connected to the connecting part, and a fixed rope connected between the fixed block and the fixed sleeve, one end of the fixed rope is fixedly connected to the fixed block, and the other end is wrapped around the fixed sleeve, the positioning block is provided with a fixed groove for the fixed block to be inserted, the fixed block is slidably connected to the connecting part, and an elastic member is provided between the fixed block and the fixed sleeve for driving the fixed block to slide toward the positioning block.

[0019] By adopting the above technical solution, the fixing sleeve is driven to rotate around its own axis so that the fixing rope is further wrapped around the fixing sleeve. The fixing rope pulls the fixing block to gradually move out of the fixing groove. The elastic member is subjected to force to produce elastic deformation and maintain a tendency of elastic reset. When the fixing block is completely moved out of the fixing groove and the fixing sleeve is kept open, the opening and closing nut can be driven to rotate by the handle.

[0020] When the opening and closing nut is rotated to the required angle and the fixing block corresponds to the fixing groove one by one, the fixing sleeve is released, the elastic part is elastically reset, and the fixing block is driven to slide toward the positioning block. The fixing rope gradually comes out of the fixing sleeve, and the fixing block is stuck in the corresponding fixing groove, thereby limiting the rotation of the opening and closing nut.

[0021] Optionally, the handle is provided with an extension groove, which extends from the connecting part to the rod part, and the rod part is provided with a linkage groove connected to the extension groove. The rod part is slidably connected to a linkage block that is inserted into and slides in the linkage groove. A linkage rope is laid in the extension groove, one end of the linkage rope is wrapped around the fixed sleeve, and the other end is fixedly connected to the groove wall of the extension groove, and one end of the linkage block corresponds to the linkage rope.

[0022] By adopting the above technical solution, the linkage block is pressed to move toward the linkage groove, and at the same time the linkage block abuts against the linkage rope and tightens the linkage rope, so that the linkage rope is disengaged from the fixed sleeve, driving the fixed sleeve to rotate around its own axis, driving the fixed block to move out of the fixed groove, and the elastic part is subjected to force to produce elastic deformation, thereby realizing rapid unlocking of the opening and closing nut.

[0023] At the same time, after the opening and closing nut is rotated to the required angle, the linkage block is released, the elastic part is reset to drive the fixed sleeve to rotate, the linkage rope is wrapped around the fixed sleeve again, the linkage rope drives the linkage block to reset, and the fixed block is stuck in the fixed groove, thereby realizing rapid fixation after the opening and closing nut is rotated.

[0024] Optionally, the connecting portion is provided with a rotating groove for the fixing sleeve to be embedded and rotatably connected, the circumferential groove wall of the rotating groove is provided with a sliding groove that passes through the circumferential outer wall of the connecting portion, the fixing block is inserted into and slides in the sliding groove, and one end of the extension groove is connected to the rotating groove.

[0025] By adopting the above technical solution, the fixed sleeve is embedded in and rotatably connected in the rotating groove, thereby realizing the rotational connection of the fixed connection part and simultaneously limiting the rotation of the fixed sleeve; the fixed block is inserted into and slides in the sliding groove, and the sliding groove can guide and limit the sliding of the fixed block, thereby improving the sliding stability of the fixed block and improving the accuracy of the fixed block being inserted into the fixed groove.

[0026] Optionally, the fixing sleeve includes a first ring portion and a second ring portion fixedly connected to the first ring portion, the first ring portion is for the fixing rope to be wound around, and the second ring portion is for the linkage rope to be wound around.

[0027] By adopting the above technical solution, the fixing rope is wound around the first ring portion, and the linkage rope is wound around the second ring portion, which effectively avoids the fixing rope and the linkage rope from intersecting with each other.

[0028] Optionally, the linkage block is fixedly connected to an elastic block, and a groove wall of the linkage groove is provided with a limiting groove for the elastic block to be inserted and slide.

[0029] By adopting the above technical solution, the elastic block is inserted into and slides in the limit groove, which plays a role in limiting and guiding the sliding of the linkage block. When the linkage block is inserted into the linkage groove, the elastic block abuts against the groove wall of the linkage groove and is squeezed to produce deformation. When the elastic block is aligned with the limit groove, the elastic block elastically resets and is inserted into the limit groove.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. The actuator is replaced by a pressure test mechanism. The pressure test mechanism only includes a blind cover and an opening and closing nut. The opening and closing nut is driven to rotate around the axis of the valve stem by a wrench or other tools. The opening and closing nut is threadedly connected to the blind cover. The opening and closing nut moves along the length of the valve stem, driving the valve stem to move along its own length to open the valve, which is convenient for pressure testing. Compared with larger actuators, the pressure test mechanism is smaller in size and simpler in structure, which effectively reduces damage to the valve during transportation and eliminates the need to disassemble and assemble the actuator after the pressure test, making it more convenient.

[0032] 2. By pressing the linkage block to move into the linkage groove, the linkage block abuts against the linkage rope and tightens the linkage rope, so that the linkage rope is released from the fixed sleeve, driving the fixed sleeve to rotate around its own axis, driving the fixed block to move out of the fixed groove, and the elastic member to produce elastic deformation under force, thereby realizing the rapid unlocking of the opening and closing nut;

[0033] 3. After the closing nut is rotated to the required angle, the linkage block is released, the elastic part is reset to drive the fixed sleeve to rotate, the linkage rope is wrapped around the fixed sleeve again, the linkage rope drives the linkage block to reset, and the fixed block is stuck in the fixed groove to achieve rapid fixation after the opening and closing nut is rotated. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0035] Figure 2 is an exploded schematic diagram of an embodiment of the present application;

[0036] Figure 3 This is a schematic structural diagram of the handle and positioning structure of an embodiment of the present application;

[0037] Figure 4 is an exploded schematic diagram of the handle and positioning structure of an embodiment of the present application;

[0038] Figure 5 is a schematic structural diagram of a connecting ring according to an embodiment of the present application;

[0039] Figure 6 is a structural schematic diagram of a fixing sleeve according to an embodiment of the present application;

[0040] Figure 7 This is a schematic structural diagram of a handle according to an embodiment of the present application;

[0041] Figure 8 It is a cross-sectional schematic diagram of the handle of an embodiment of the present application.

[0042] Explanation of the accompanying drawings: 1. Box body; 2. Valve; 21. Valve stem; 3. Cover; 31. Positioning ring; 32. Dovetail groove; 4. Opening and closing nut; 5. Handle; 51. Connecting part; 511. Rotating groove; 512. Sliding groove; 52. Rod; 53. Nut groove; 54. Connecting ring; 55. Positioning block; 56. Fixing groove; 57. Extension groove; 58. Linkage groove; 59. Limiting groove; 6. Positioning structure; 61. Fixing block; 62. Fixing sleeve; 621. First ring part; 622. Second ring part; 63. Fixing rope; 7. Elastic member; 8. Linkage block; 81. Elastic block; 9. Linkage rope. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-8 This application is described in further detail.

[0044] The embodiment of the present application discloses a valve pressure testing structure for a complete cold box.

[0045] Reference Figure 1 and Figure 2A valve pressure test structure for a complete cold box includes a box body 1, a valve 2 fixedly connected to the interior of the box body 1, and a pressure test structure. The valve 2 includes a valve stem 21 extending through the box body 1. The pressure test structure includes a blind cover 3 fixedly connected to the outer wall of the cold box, and an opening and closing nut 4 threadedly connected to the blind cover 3. The opening and closing threads are rotatably connected to the end of the valve stem 21 facing away from the valve 2. The valve stem 21 is axially inserted into the blind cover 3. The blind cover 3, opening and closing nut 4, and valve stem 21 are coaxial.

[0046] Reference Figure 1 and Figure 2 The blind cover 3 is fixedly connected to the housing 1 by bolts, and the opening and closing nut 4 is sleeved on one end of the valve stem 21. The opening and closing nut 4 is connected to the valve stem 21 by driving the bolt with the O-ring. The rod 52 of the bolt is passed through the opening and closing nut 4 and is threadedly connected to one end of the valve stem 21, so that the opening and closing nut 4 is limited between the O-ring and the end of the valve stem 21, thereby realizing the rotational connection between the opening and closing nut 4 and the valve stem 21. The blind cover 3 is integrally formed with an external threaded portion, and the opening and closing nut 4 is integrally formed with an internal threaded portion. The opening and closing nut 4 is sleeved on the external threaded portion, and the threads of the external threaded portion and the internal threaded portion cooperate with each other to realize the threaded connection between the opening and closing nut 4 and the blind cover 3.

[0047] Reference Figure 2 and Figure 3 The opening and closing nut 4 is connected to a handle 5, which includes a connecting portion 51 sleeved on the opening and closing nut 4 and a rod portion 52 fixedly connected to the circumferential side wall of the connecting portion 51. The connecting portion 51 is provided with a nut groove 53 for the opening and closing nut 4 to be inserted, and the nut groove 53 and the opening and closing nut 4 are interference fit.

[0048] Reference Figure 2 and Figure 3 A coaxial positioning ring 31 is fixedly connected to one side of the cover 3, and a coaxial connecting ring 54 is rotatably connected to one side of the connecting portion 51. A plurality of positioning blocks 55 are fixedly connected to the connecting ring 54 at intervals along the circumferential direction. The number of positioning blocks 55 is selected according to actual needs. The positioning blocks 55 are L-shaped blocks, one end of which is fixedly connected to the circumferential side wall of the connecting ring 54, and the other end is slidably connected to the circumferential inner wall of the positioning ring 31. The connecting portion 51 is equipped with a positioning structure 6 for cooperating with the positioning block 55 to limit the rotation of the opening and closing nut 4. A dovetail groove 32 is provided on the circumferential inner wall of the positioning ring 31, which corresponds to and cooperates with the positioning block 55. The positioning block 55 is a dovetail block that is inserted into and slides in the dovetail groove 32.

[0049] Reference Figure 4 and Figure 5The positioning structure 6 includes a fixed block 61 corresponding to the positioning block 55, a fixed sleeve 62 rotatably connected to the connecting portion 51, and a fixed rope 63 connected between the fixed block 61 and the fixed sleeve 62. One end of the fixed rope 63 is fixedly connected to one end of the fixed block 61, and the other end is wrapped around the circumferential side wall of the fixed sleeve 62. The positioning block 55 is provided with a fixed groove 56 for the fixed block 61 to be snapped into. The fixed block 61 is slidably connected to the connecting portion 51. An elastic member 7 is installed between the fixed block 61 and the fixed sleeve 62 for driving the fixed block 61 to slide toward the positioning block 55.

[0050] Reference Figure 6 The fixed sleeve 62 includes a first ring portion 621 and a second ring portion 622 of coaxial centerline. The second ring portion 622 is fixedly connected to one end of the first ring portion 621. The first ring portion 621 is for the fixing rope 63 to be wound around, and the second ring portion 622 is for the linkage rope 9 to be wound around. The fixing rope 63 and the linkage rope 9 are both conventional flexible steel wire ropes.

[0051] Reference Figure 6 and Figure 7 A rotation groove 511 is defined on one side of the connecting portion 51, into which the fixing sleeve 62 is inserted and rotatably connected. A sliding groove 512 is defined in the circumferential wall of the rotation groove 511 and extends through the circumferential outer wall of the connecting portion 51. The sliding grooves 512 correspond one-to-one with the fixing blocks 61, and the fixing blocks 61 engage and slide in the corresponding sliding grooves 512. The elastic member 7 is a spring, one end of which is fixedly connected to one end of the fixing block 61 and the other end is fixedly connected to the wall of the sliding groove 512.

[0052] Reference Figure 7 and Figure 8 The handle 5 is provided with an extension groove 57, which extends from the connecting portion 51 to the rod portion 52. The rod portion 52 is provided with a linkage groove 58 connected to the extension groove 57. The rod portion 52 is slidably connected to a linkage block 8 that is inserted into and slides in the extension groove 57. A linkage rope 9 is laid in the extension groove 57. One end of the extension groove 57 is connected to the rotating groove 511. One end of the linkage rope 9 is wrapped around the fixed sleeve 62, and the other end is fixedly connected to the groove wall of the extension groove 57. The rod portion 52 is slidably connected to a linkage block 8 that is inserted into and slides in the linkage groove 58, and one end of the linkage block 8 faces the linkage rope 9.

[0053] Reference Figure 7 and Figure 8 One side of the linkage block 8 is fixedly connected to an elastic block 81 made of elastic material such as plastic. The groove wall of the linkage groove 58 is provided with a limiting groove 59 for the elastic block 81 to be inserted and slided. The extension direction of the limiting groove 59 is the same as the groove depth direction of the linkage groove 58.

[0054] The implementation principle of the valve pressure test structure of a supporting integrated cold box in the embodiment of the present application is as follows:

[0055] The actuator is replaced by a pressure test mechanism, which only includes a blind cover 3 and an opening and closing nut 4. The opening and closing nut 4 is driven to rotate around the axis of the valve stem 21 by a wrench or other tools. The opening and closing nut 4 is threadedly connected to the blind cover 3. The opening and closing nut 4 is displaced along the length direction of the valve stem 21, driving the valve stem 21 to displace along its own length direction, thereby realizing the opening of the valve 2 and facilitating pressure testing. Compared with a larger actuator, the pressure test mechanism is smaller in size and simpler in structure, which effectively reduces damage to the valve 2 during transportation and eliminates the need to disassemble and assemble the actuator after the pressure test, making it more convenient.

[0056] By pressing the linkage block 8 to move into the linkage groove 58, the linkage block 8 abuts against the linkage rope 9 and tightens the linkage rope 9, so that the linkage rope 9 is disengaged from the fixing sleeve 62, driving the fixing sleeve 62 to rotate around its own axis, driving the fixing block 61 to move out of the fixing groove 56, and the elastic member 7 is subjected to force to produce elastic deformation, thereby realizing rapid unlocking of the opening and closing nut 4.

[0057] At the same time, after the opening and closing nut 4 is rotated to the required angle, the linkage block 8 is released, the elastic member 7 is reset to drive the fixing sleeve 62 to rotate, the linkage rope 9 is wrapped around the fixing sleeve 62 again, the linkage rope 9 drives the linkage block 8 to reset, and the fixing block 61 is stuck in the fixing groove 56, thereby realizing rapid fixation of the opening and closing nut 4 after rotation.

[0058] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A valve pressure test structure for a complete cold box, comprising a box body (1), a valve (2) disposed inside the box body (1), the valve (2) comprising a valve stem (21) passing through the box body (1), and characterized in that: The device further comprises a pressure testing mechanism, the pressure testing mechanism comprising a blind cover (3) fixedly connected to the outer wall of the cold box, an opening and closing nut (4) threadedly connected to the blind cover (3), the opening and closing nut (4) being rotatably connected to the valve stem (21), and the valve stem (21) being passed through the blind cover (3); The opening and closing nut (4) is fixedly connected to a handle (5), and the handle (5) comprises a connecting portion (51) fixedly sleeved on the opening and closing nut (4) and a rod portion (52) fixedly connected to the connecting portion (51); The blind cover (3) is fixedly connected to a positioning ring (31), the connecting portion (51) is rotatably connected to a connecting ring (54), the connecting ring (54) is fixedly connected to a plurality of positioning blocks (55) at intervals along the circumferential direction, the positioning blocks (55) are slidably connected to the positioning ring (31), and the connecting portion (51) is provided with a positioning structure (6) for cooperating with the positioning blocks (55) to limit the rotation of the opening and closing nut (4); The positioning structure (6) comprises a fixed block (61) corresponding to the positioning block (55) in a one-to-one manner, a fixed sleeve (62) rotatably connected to the connecting portion (51), and a fixed rope (63) connected between the fixed block (61) and the fixed sleeve (62), one end of the fixed rope (63) is fixedly connected to the fixed block (61), and the other end is wound around the fixed sleeve (62), the positioning block (55) is provided with a fixed groove (56) for the fixed block (61) to be inserted, the fixed block (61) is slidably connected to the connecting portion (51), and an elastic member (7) is provided between the fixed block (61) and the fixed sleeve (62) for driving the fixed block (61) to slide toward the positioning block (55).

2. The valve pressure testing structure for a self-contained cold box according to claim 1 is characterized in that: The connecting portion (51) is provided with a nut groove (53) for the opening and closing nut (4) to be inserted into, and the nut groove (53) and the opening and closing nut (4) are in interference fit.

3. The valve pressure testing structure for a self-contained cold box according to claim 1 is characterized in that: The positioning ring (31) is provided with a dovetail groove (32) along the circumferential direction, which corresponds to the positioning block (55) one by one and is for the positioning block (55) to be inserted into. The positioning block (55) is a dovetail block that cooperates with the dovetail groove (32).

4. The valve pressure testing structure for a self-contained cold box according to claim 1 is characterized in that: The handle (5) is provided with an extension groove (57), and the extension groove (57) extends from the connecting portion (51) to the rod portion (52). The rod portion (52) is provided with a linkage groove (58) connected to the extension groove (57). The rod portion (52) is slidably connected to a linkage block (8) that is inserted into and slides in the linkage groove (58). A linkage rope (9) is laid in the extension groove (57). One end of the linkage rope (9) is wound around the fixing sleeve (62), and the other end is fixedly connected to the groove wall of the extension groove (57). One end of the linkage block (8) corresponds to the linkage rope (9).

5. The valve pressure testing structure for a self-contained cold box according to claim 4 is characterized in that: The connecting portion (51) is provided with a rotating groove (511) for the fixing sleeve (62) to be embedded and rotatably connected, and the circumferential groove wall of the rotating groove (511) is provided with a sliding groove (512) that passes through the circumferential outer wall of the connecting portion (51), the fixing block (61) is inserted into and slides in the sliding groove (512), and one end of the extension groove (57) is connected to the rotating groove (511).

6. The valve pressure testing structure for a self-contained cold box according to claim 4 is characterized in that: The fixing sleeve (62) comprises a first ring portion (621) and a second ring portion (622) fixedly connected to the first ring portion (621); the first ring portion (621) is for the fixing rope (63) to be wound around, and the second ring portion (622) is for the linkage rope (9) to be wound around.

7. The valve pressure testing structure for a self-contained cold box according to claim 4 is characterized in that: The linkage block (8) is fixedly connected to an elastic block (81), and a groove wall of the linkage groove (58) is provided with a limiting groove (59) for the elastic block (81) to be inserted and slided.

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