High-temperature steam safety valve and using method

Abstract

The invention discloses a high-temperature steam safety valve and a using method, and belongs to the technical field of steam safety valves. The high-temperature steam safety valve comprises a pipeline and a slow descending assembly, safety valve assemblies are arranged at the two ends of the pipeline, cleaning assemblies are arranged on the inner sides of the safety valve assemblies, and self-checking assemblies are arranged at the top ends of the safety valve assemblies; a slow descending assembly is installed on the inner wall of a bottom channel of the valve body, an abutting disc is installed between a limiting ring and a base plate through a plurality of elastic pieces fixed to the periphery, a plurality of second springs are further arranged between the abutting disc and the base plate, and before the valve clack is reset and abuts against the valve seat in a sealed mode, the downward protruding part of the bottom of the valve clack can make contact with the abutting disc firstly, and then the valve clack is pressed against the base plate. The valve clack can be supported through upward acting force provided by the elastic piece and the second spring, the valve clack can slowly move downwards, impact force generated when the valve clack abuts against the valve seat is reduced, and therefore abrasion or the failure rate of the valve clack and the valve seat can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of steam safety valves, and more specifically, to a high-temperature steam safety valve and a use method thereof. Background Art

[0002] The steam safety valve is a key device used to protect the steam system. In the steam system, the steam safety valve acts like a fuse. When the system reaches a certain pressure, the safety valve will automatically open and release excessive pressure to prevent the system pressure from exceeding the safety range and causing an accident. When the internal pressure of the system exceeds the set value, the safety valve will open and release some steam to reduce the system pressure to a safe level. This helps prevent equipment damage or explosions, while protecting the safety of operators. When the pressure in the system drops to a safe range, the safety valve will close and the system will continue to operate normally.

[0003] The Chinese patent announcement number CN116357786A discloses a high-pressure steam safety valve. Through the mutual cooperation of the ball valve, the sealing unit and the test tube, when the safety valve is inspected, the ball valve is rotated 90° counterclockwise, the third through hole is connected to the valve seat, the second through hole is closed, the sealing unit is opened, water is injected through the test tube, and it is observed whether there is liquid overflowing from the exhaust port, so as to judge whether the sealing surface is worn. There is no need to disassemble the valve body, and the inspection is more convenient. Through the mutual cooperation of the sealing cover and the sealing cylinder, when no inspection is carried out, the sixth through hole and the seventh through hole are misaligned, and the sixth through hole is closed. When the inspection is carried out, the ball valve is rotated 90° counterclockwise, the sixth through hole is connected, and when the ball valve is turned, the test tube is automatically connected, which is more convenient to use.

[0004] When the pressure in the pipeline is greater than the set safety valve spring force, the safety valve disc will be pushed open to achieve the purpose of pressure relief. However, when the pressure relief is completed, the valve disc will be reset downward by the force of the spring. Since the safety valve is mainly sealed by the abutment between the valve disc and the valve seat, the valve disc that is reset downward by the spring force is prone to violently collide with the valve seat due to excessive speed, which can easily cause damage to the valve disc or valve seat and affect the sealing of the safety valve.

[0005] Traditional safety valves are installed separately on pipelines. If the safety valve needs to be repaired or replaced, the connection between the safety valve and the pipeline needs to be closed, and then the safety valve is removed and replaced. Since replacement or repair takes a certain amount of time, during the period when replacement or repair is not completed, the pipeline at that location will not be protected by a safety valve, thus posing a safety hazard.

[0006] Therefore, it is necessary to provide a high-temperature steam safety valve and a method of use to solve the above problems. Summary of the invention

[0007] The present invention provides a high-temperature steam safety valve and a method for using the same, which can improve the problem in the related art that after the pressure relief is completed, the valve disc will reset downwards due to the force of a spring. Since the safety valve is mainly sealed by the abutment between the valve disc and the valve seat, the valve disc that is reset downwards by the force of the spring is prone to violently collide with the valve seat due to excessive speed, thereby easily causing damage to the valve disc or the valve seat and affecting the sealing performance of the safety valve.

[0008] In the first aspect, an embodiment of the present application provides a high-temperature steam safety valve, comprising: a pipeline and a slow-descent assembly, safety valve assemblies are arranged at both ends of the pipeline, a cleaning assembly is arranged on the inner side of the safety valve assembly, and a self-inspection assembly is arranged on the top of the safety valve assembly, an outer fixed frame is fixedly connected to the outer end of the pipeline, a driving assembly is arranged on the inner side of the outer fixed frame, two butterfly valve assemblies are arranged on the inner side of the pipeline, the two butterfly valve assemblies are used to control the opening and closing of the channels in the two ends of the pipeline, and an adjustment assembly is arranged on the top of the two butterfly valve assemblies, the slow-descent assembly comprises an abutment plate and a plurality of fixing frames distributed in an annular shape and equidistant therefrom, the slow-descent assembly is arranged inside the safety valve assembly, a plurality of spring pieces distributed in an annular shape are fixedly connected to the outer end of the abutment plate, the spring pieces are arranged in an arc shape, the fixing frame is arranged in a U shape, and the two ends of the fixing frame are respectively fixedly connected to a limiting ring and a chassis.

[0009] The above technical solutions in the embodiments of the present application have at least the following technical effects: (1) A slow-down assembly is installed on the inner wall of the bottom channel of the valve body. The abutment plate is installed between the limit ring and the bottom plate through multiple springs fixed on the outer periphery. Multiple springs are also arranged between the abutment plate and the bottom plate. Before the valve disc is reset and abuts against the valve seat for sealing, the downward protruding part of the bottom of the valve disc will first contact the abutment plate. The upward force provided by the spring and spring can support the valve disc so that it can move downward slowly, reducing the impact force when the valve disc abuts against the valve seat, thereby reducing the wear or failure rate of the valve disc and the valve seat.

[0010] (2) The pipeline is a Y-shaped pipeline. Safety valve assemblies are set at both ends of the pipeline. Two sets of butterfly valve assemblies are set inside the pipeline. When one set of butterfly valve assemblies is open, the other is closed. When the turntable is rotated, the active bevel gear can simultaneously drive the passive bevel gear 1 and the passive bevel gear 2 to rotate, so that the two movable blocks move in opposite directions, so that the previously closed butterfly valve assembly opens, and the opened butterfly valve assembly closes. When a safety valve assembly needs to be replaced, one of the butterfly valve assemblies can be closed without closing the entire pipeline, so that the steam pipeline always has a safety valve assembly working, thereby improving safety.

[0011] (3) A cleaning assembly is arranged on the inner side of the valve cover, and a plurality of slanted air holes are arranged below the cleaning assembly. When the valve disc is pushed open to release pressure, part of the steam will pass through the air holes and act on the blade assembly, so that it can drive the fixing plate and the cleaning sponge to rotate around the spring 1, thereby cleaning the surface of the spring 1 and preventing dirt from accumulating on the surface and affecting its performance.

[0012] In some embodiments, the safety valve assembly includes a valve body, a valve stem and a valve seat, a valve cover is installed on the top of the valve body by bolts, the valve stem passes through the valve cover and extends into the interior of the valve body, a valve flap is fixedly connected to the bottom end of the valve stem, the valve seat is fixedly installed on the inner wall of the valve body, the valve flap isolates the valve body from the interior of the pipeline by abutting against the valve seat, an abutment ring is fixedly connected to the outer end of the valve stem, and a spring is sleeved on the outer end of the valve stem, a pressure relief channel connected to the interior is provided at the outer end of the valve body, and a latch is installed on the top end of the valve stem.

[0013] In some embodiments, a plurality of the fixing frames are fixedly connected to a fixing rod on the inner side, a limiting groove matched with the fixing rod is opened at the outer end of the spring sheet, the limiting groove is slidably connected to the fixing rod, the spring sheet is limited by the fixing rod, a plurality of springs 2 are installed between the abutment plate and the chassis, the abutment plate moves upward and extends to above the limiting ring by the action of spring 2, a fixing claw is fixedly connected to the bottom end of the fixing frame, the fixing claw is fixedly installed on the inner wall of the valve body, and the top end of the abutment plate abuts against the bottom end of the valve disc.

[0014] In some embodiments, the self-test component includes a pull rod and a rotating rod. The pull rod is rotatably installed on the outer end of the valve cover. The rotating rod is rotatably installed on the outer end of the valve cover through a rotating shaft. The valve stem is connected to the rotating rod through a pin. The top end of the pull rod is fixedly connected to a top block, and the top block abuts against the outer end of the rotating rod. The pull rod rotates to squeeze the top block to rotate the rotating rod upward.

[0015] In some embodiments, the driving assembly includes a driving shaft, two mounting frames 2 and two connecting rods, the two mounting frames 2 are fixedly mounted inside an outer fixed frame, the top of the driving shaft is fixedly connected to a turntable, the outer end of the driving shaft is fixedly connected to an active bevel gear, and the bottom end of the driving shaft is rotatably connected to the bottom end inside the outer fixed frame, one end of the two connecting rods respectively passes through the two mounting frames 2, and one end of the two connecting rods are respectively fixedly connected to a passive bevel gear 1 and a passive bevel gear 2, the passive bevel gear 1 and the passive bevel gear 2 are both meshed with the active bevel gear, the other ends of the two connecting rods are fixedly connected to a transmission bevel gear 1, and the outer ends of the two transmission bevel gears 1 are meshed with a transmission bevel gear 2.

[0016] In some embodiments, the adjustment component includes a mounting frame 1, which is fixedly mounted on the outer end of the pipe, a movable block is slidably connected to the inner side of the mounting frame 1, a movable groove and two drive grooves are respectively provided at the outer end of the movable block, the movable groove and the two drive grooves are communicated, and a fixed block is fixedly connected to the bottom end of the mounting frame 1.

[0017] In some embodiments, the adjustment assembly also includes a screw, a slide groove is opened on the inner side of the mounting frame, the bottom end of the movable block is fixedly connected with a screw sleeve, the screw sleeve passes through the slide groove, the screw is threadedly connected to the screw sleeve, one end of the screw is rotatably connected to the fixed block, and the other end of the screw is fixedly connected to transmission bevel gear 2.

[0018] In some embodiments, the butterfly valve assembly includes valve disc one and valve disc two, the valve disc one is fixedly connected to a rotating rod two on one side close to valve disc two, the valve disc two is fixedly connected to a rotating sleeve on one side close to valve disc one, the rotating rod two penetrates the rotating sleeve, the rotating rod two and the top end of the rotating sleeve both penetrate the inner wall of the pipe and extend to the outside, the top end of the rotating sleeve is fixedly connected to a driving rod one, the top end of the rotating rod two is fixedly connected to a driving rod two, and the driving rod one and the driving rod two are respectively adapted to two driving grooves.

[0019] In some embodiments, the cleaning component includes a bearing, which is installed on the outer end of the valve cover. A blade group is installed outside the bearing. A plurality of fixing plates are fixedly connected to the top of the blade group. A plurality of cleaning sponges are fixedly connected to the outer end of the fixing plate. The cleaning sponge is abutted against an outer end of a spring. A plurality of air holes are opened on the outer end of the valve cover, and the air holes are arranged at an inclination.

[0020] In a second aspect, the present invention provides a method for using a high-temperature steam safety valve, comprising the following steps: S1: Turn the turntable to make the driving shaft drive the active bevel gear to rotate, and the active bevel gear drives the passive bevel gear 1 and the passive bevel gear 2 to rotate in opposite directions; S2: The rotating passive bevel gear 1 and the passive bevel gear 2 drive the screw to rotate through the connecting rod, the transmission bevel gear 1 and the transmission bevel gear 2 respectively, so that the screw sleeves in the two sets of adjustment components move in opposite directions; S3: When the screw sleeve drives the movable block to move, the two driving grooves will drive the driving rod 2 and the driving rod 1 to respectively drive the valve plate 1 and the valve plate 2 to rotate in opposite directions, and by rotating the turntable, one channel inside the pipeline is opened while the other channel is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A first overall structural diagram provided for an embodiment of the present application; Figure 2 A second overall structural diagram provided for an embodiment of the present application; Figure 3 A schematic diagram of the structure of a safety valve assembly provided in an embodiment of the present application; Figure 4 A schematic cross-sectional view of a safety valve assembly provided in an embodiment of the present application; Figure 5 A schematic diagram of the structure of a self-checking component provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of a descent control assembly provided in an embodiment of the present application; Figure 7 A schematic diagram of the enlarged structure of the descent control assembly provided in an embodiment of the present application; Figure 8 A schematic diagram of the explosion structure of the descent control assembly provided in an embodiment of the present application; Fig. 9 A schematic diagram of the structure of a first drive assembly provided in an embodiment of the present application; Fig.10 A schematic diagram of the structure of a second drive assembly provided in an embodiment of the present application; Fig.11 A schematic diagram of an enlarged structure of a drive assembly provided in an embodiment of the present application; Fig.12 A schematic diagram of the structure of the regulating component provided in the embodiment of the present application; Fig.13 A schematic diagram of the structure of a butterfly valve assembly provided in an embodiment of the present application; Fig.14 A schematic diagram of the cleaning component structure provided in an embodiment of the present application; Fig.15 A schematic diagram of the ventilation hole structure provided in an embodiment of the present application.

[0023] Description of the numbers in the figure: 1. Pipeline; 2. Safety valve assembly; 21. Valve body; 22. Pressure relief channel; 23. Valve cover; 24. Valve stem; 25. Spring 1; 26. Latch; 27. Valve seat; 28. Valve disc; 29. ​​Abutment ring; 3. Cleaning assembly; 31. Bearing; 32. Blade assembly; 33. Fixing plate; 34. Cleaning sponge; 4. Self-test component; 41. Pull rod; 42. Rotating rod 1; 43. Top block; 44. Rotating shaft; 5. External fixing frame; 6. Adjustment assembly; 61. Mounting frame 1; 62. Movable block; 63. Movable slot; 64. Driving slot; 65. Slide slot; 66. Screw rod; 67. Screw sleeve; 68. Fixed block; 7. Slow-down assembly; 71. Abutment plate; 72. Fixed frame; 73. Limiting ring; 74. Fixed rod; 75. Spring; 76. Fixed claw; 77. Limiting groove; 78. Spring 2; 79. Chassis; 8. Driving assembly; 81. Active bevel gear; 82. Mounting frame 2; 83. Driving shaft; 84. Turntable; 85. Passive bevel gear 1; 86. Passive bevel gear 2; 87. Connecting rod; 88. Transmission bevel gear 1; 89. Transmission bevel gear 2; 9. Butterfly valve assembly; 91. Valve disc 1; 92. Valve disc 2; 93. Rotating rod 2; 94. Rotating sleeve; 95. Driving rod 1; 96. Driving rod 2; 10. Ventilation hole. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] Based on this, the problem in the related technology can be improved. When the pressure relief is completed, the valve disc will reset downward due to the force of the spring. Since the safety valve is mainly sealed by the abutment between the valve disc and the valve seat, the valve disc that is reset downward by the force of the spring is prone to violently collide with the valve seat due to excessive speed, which can easily cause damage to the valve disc or the valve seat and affect the sealing of the safety valve.

[0026] Example 1: Please refer to Figure 1-Figure 15A high-temperature steam safety valve comprises: a pipeline 1 and a slow-descent component 7, safety valve components 2 are arranged at both ends of the pipeline 1, a cleaning component 3 is arranged inside the safety valve component 2, and a self-inspection component 4 is arranged at the top of the safety valve component 2, an outer fixed frame 5 is fixedly connected to the outer end of the pipeline 1, a driving component 8 is arranged inside the outer fixed frame 5, two butterfly valve components 9 are arranged inside the pipeline 1, the two butterfly valve components 9 are used to control the opening and closing of the channels in the two ends of the pipeline 1, and the tops of the two butterfly valve components 9 are arranged with adjustment components 6, the slow-descent component 7 comprises an abutment plate 71 and a plurality of annularly equidistantly distributed fixing frames 72, the slow-descent component 7 is arranged inside the safety valve component 2, and the outer end of the abutment plate 71 is fixedly connected to a plurality of annularly distributed spring pieces 75, the spring pieces 75 are arranged in an arc shape, the fixing frame 72 is arranged in a U shape, and the two ends of the fixing frame 72 are respectively fixedly connected to a limiting ring 73 and a chassis 79.

[0027] The pipeline 1 in this scheme is connected to the steam pipeline. The pipeline 1 is set in a Y shape. Two safety valve assemblies 2 are set at the top two ends of the pipeline 1. Only one of the two safety valve assemblies 2 is working at the same time. A cleaning assembly 3 is set on the inner side of the safety valve assembly 2. The cleaning assembly 3 is mainly used to clean the spring 25 on the safety valve assembly 2. A plurality of vents 10 with oblique openings are set on the valve cover 23 below which the cleaning assembly 3 is installed. When the valve flap 28 is pushed open for pressure relief, part of the steam will act on the blade group 32 through the vent 10, so that it can drive the fixing plate 33 and the cleaning sponge 34 to rotate around the spring 25, clean the surface of the spring 25, and prevent the dirt on the surface from accumulating and affecting the performance.

[0028] A slow-down assembly 7 is arranged on the inner side of the safety valve assembly 2. The slow-down assembly 7 is mainly used to reduce the speed of the valve flap 28 when it is reset. The abutment plate 71 is installed between the limit ring 73 and the base plate 79 through multiple spring pieces 75 fixed on the periphery. Multiple springs 78 are also arranged between the abutment plate 71 and the base plate 79. Before the valve flap 28 is reset and abuts against the valve seat 27 for sealing, the downward protruding part of the bottom of the valve flap 28 will first contact the abutment plate 71. The upward force provided by the spring piece 75 and the spring 78 can support the valve flap 28 so that it can move downward slowly, reducing the impact force when the valve flap 28 abuts against the valve seat 27, thereby reducing the wear or failure rate of the valve flap 28 and the valve seat 27.

[0029] Two butterfly valve assemblies 9 are installed inside the pipeline 1, and the two butterfly valve assemblies 9 respectively control the opening and closing of the channels at both ends of the pipeline 1. Two adjusting assemblies 6 for driving the butterfly valve assemblies 9 are arranged at the outer end of the pipeline 1. An outer fixed frame 5 is fixed at the outer end of the pipeline 1, and a driving assembly 8 is arranged in the outer fixed frame 5. The driving assembly 8 is used to drive the two adjusting assemblies 6 at the same time. When the turntable 84 is rotated, the active bevel gear 81 can simultaneously drive the passive bevel gear 1 85 and the passive bevel gear 2 86 to rotate, so that the two movable blocks 62 move in opposite directions, so that the originally closed butterfly valve assembly 9 is opened, and the opened butterfly valve assembly 9 will be closed. When a safety valve assembly 2 needs to be replaced, one of the butterfly valve assemblies 9 can be closed without closing the entire pipeline 1, so that the steam pipeline always has a safety valve assembly 2 working, thereby improving safety.

[0030] Optionally, in some embodiments, see Figure 1-Figure 4 The safety valve assembly 2 includes a valve body 21, a valve stem 24 and a valve seat 27. A valve cover 23 is installed on the top of the valve body 21 by bolts. The valve stem 24 penetrates the valve cover 23 and extends to the inside of the valve body 21. A valve flap 28 is fixedly connected to the bottom of the valve stem 24. The valve seat 27 is fixedly installed on the inner wall of the valve body 21. The valve flap 28 isolates the valve body 21 from the inside of the pipeline 1 by abutting against the valve seat 27. An abutment ring 29 is fixedly connected to the outer end of the valve stem 24, and a spring 25 is sleeved on the outer end of the valve stem 24. A pressure relief channel 22 connected to the inside is provided at the outer end of the valve body 21, and a latch 26 is installed at the top of the valve stem 24.

[0031] The valve body 21 in this scheme is connected to the port of the pipeline 1 through a flange, and the top of the valve body 21 is connected to the valve cover 23 through bolts. The valve stem 24 penetrates the valve cover 23 and the valve body 21 and extends to the inside of the valve body 21, and the top of the valve stem 24 is installed with a latch 26, through which the valve stem 24 can be connected to the rotating rod 42. At this time, a valve disc 28 is fixed at the bottom of the valve stem 24, and the valve disc 28 can move up and down with the valve stem 24. The valve seat 27 is fixed on the internal channel of the valve body 21 and is used to abut against the valve disc 28 to form a seal. The outer end of the valve stem 24, that is, the part located on the inner side of the valve cover 23, is fixed with an abutment ring 29, and the outer end sleeve of the valve stem 24 A spring 25 is provided, and the abutment ring 29 is mainly used to abut against the spring 25. When the valve stem 24 moves upward, the spring 25 can be compressed through the abutment ring 29 and the top of the valve cover 23. When the pressure in the steam pipe is too high, it will be transmitted to the valve body 21 through the pipeline 1. When the pressure is greater than the preset force of the spring 25, the pressure will push the valve flap 28 upward, so that a gap will appear between the valve flap 28 and the valve seat 27, so that the internal steam can be released, and the pressure relief channel 22 connects the valve body 21 with the outside to discharge the steam, thereby achieving the purpose of pressure relief. When the pressure returns to normal, the valve flap 28 can be reset downward and re-sealed through the force of the spring 25.

[0032] Optionally, in some embodiments, see Figure 6-Figure 8 , multiple fixing frames 72 are fixedly connected to fixing rods 74 on the inner sides, and a limiting groove 77 adapted to the fixing rod 74 is opened at the outer end of the spring sheet 75. The limiting groove 77 is slidably connected to the fixing rod 74, and the spring sheet 75 is limited by the fixing rod 74. Multiple springs 78 are installed between the abutment plate 71 and the chassis 79. The abutment plate 71 moves upward and extends to the top of the limiting ring 73 under the action of springs 78. The bottom end of the fixing frame 72 is fixedly connected to a fixing claw 76, which is fixedly installed on the inner wall of the valve body 21, and the top of the abutment plate 71 abuts against the bottom end of the valve disc 28.

[0033] The slow-down assembly 7 in the present scheme is installed inside the valve body 21, and is located just below the valve disc 28. The two ends of a plurality of annular and equidistantly distributed fixing frames 72 are respectively connected to a limit ring 73 and a chassis 79, wherein the limit ring 73 is mainly used to limit the abutment plate 71 to prevent it from detaching, and the chassis 79 is mainly used to install a spring 2 78. The fixing frame 72 is set in a U shape, so that the spring piece 75 fixed on the outer periphery of the abutment plate 71 can extend into it. A fixing rod 74 is fixed on the inner side of the fixing frame 72. A limit groove 77 is provided at the outer end of the spring piece 75. The limit groove 77 is slidably connected to the fixing rod 74, so that the spring piece 75 and the abutment plate 71 cannot rotate. The plurality of springs 2 78 fixedly installed between the abutment plate 71 and the chassis 79 are used to help the abutment plate 71 to reset. A fixing claw 76 is fixed at the bottom end of each fixing frame 72, and the fixing claw 76 is fixed on the inner side wall of the valve body 21, thereby fixing the slow-down assembly 7.

[0034] When the valve flap 28 is reset by the force of the spring 1 25, before it abuts against the valve seat 27, the protrusion at the bottom of the valve flap 28 will first abut against the top of the abutment plate 71. At this time, the force of the spring 75 and the spring 2 78 can provide an upward force for the valve flap 28, thereby generating resistance to the downward movement of the valve flap 28, slowing down its speed and preventing the valve flap 28 and the valve seat 27 from colliding violently, thereby preventing the contact surface of the valve flap 28 and the valve seat 27 from being damaged, thereby improving its service life and sealing performance.

[0035] Optionally, in some embodiments, see Figure 5 The self-test component 4 includes a pull rod 41 and a rotating rod 42. The pull rod 41 is rotatably installed on the outer end of the valve cover 23. One end of the rotating rod 42 is rotatably installed on the outer end of the valve cover 23 through a rotating shaft 44. The valve stem 24 is connected to the rotating rod 42 through a pin 26. A top block 43 is fixedly connected to the top of the pull rod 41. The top block 43 abuts against the outer end of the rotating rod 42. The pull rod 41 rotates to squeeze the rotating rod 42 to rotate upward.

[0036] The self-test component 4 in the present scheme is installed on the top of the valve cover 23, wherein the rotating rod 42 and the pull rod 41 are both rotatably connected to the outer end of the valve cover 23. In the static state, the rotating rod 42 and the pull rod 41 are set at 90 degrees, and the top block 43 is fixed on the top of the pull rod 41, and the valve stem 24 is rotatably connected to the rotating rod 42 near the middle through the pin 26. When the safety valve assembly 2 needs to be tested for pressure relief, the pull rod 41 can be slightly rotated upward, and the protruding part of the top block 43 will be against the rotating rod 42, thereby pushing the rotating rod 42 upward, so that the rotating rod 42 drives the valve stem 24 to move upward, so that a certain gap is left between the valve disc 28 and the valve seat 27. At this time, the steam engine will spray out, which means that the safety valve assembly 2 can work normally, otherwise it needs to be repaired. The self-test component 4 can be used to conveniently perform routine inspections on the safety valve assembly 2.

[0037] Optionally, in some embodiments, see Figure 9-11 The driving assembly 8 includes a driving shaft 83, two mounting frames 82 and two connecting rods 87. The two mounting frames 82 are fixedly installed inside the outer fixed frame 5. The top of the driving shaft 83 is fixedly connected to a turntable 84. The outer end of the driving shaft 83 is fixedly connected to an active bevel gear 81, and the bottom end of the driving shaft 83 is rotatably connected to the bottom end inside the outer fixed frame 5. One ends of the two connecting rods 87 respectively penetrate the two mounting frames 82, and one ends of the two connecting rods 87 are respectively fixedly connected to a passive bevel gear 1 85 and a passive bevel gear 2 86. The passive bevel gear 1 85 and the passive bevel gear 2 86 are both meshed with the active bevel gear 81. The other ends of the two connecting rods 87 are fixedly connected to a transmission bevel gear 1 88, and the outer ends of the two transmission bevel gears 1 88 are meshed with a transmission bevel gear 2 89.

[0038] The driving assembly 8 in this scheme is mainly installed inside the outer fixing frame 5, and the outer fixing frame 5 is fixed to the outer end of the pipeline 1, and two mounting frames 82 are fixed at the inner bottom end of the outer fixing frame 5, and two connecting rods 87 respectively penetrate the top ends of the two mounting frames 82, and a rotating bearing is arranged between the connecting rod 87 and the mounting frame 82 so that it can rotate. The two connecting rods 87 penetrate one end of the mounting frame 82 and also fix the passive bevel gear 1 85 and the passive bevel gear 2 86 respectively, and the outer end of the driving shaft 83 is fixed with the active bevel gear 81, and the active bevel gear 81 is meshed and connected with the passive bevel gear 1 85 and the passive bevel gear 2 86 at the same time, so as to drive the passive bevel gear 1 85 and the passive bevel gear 2 86 to rotate at the same time, and the passive bevel gear 1 85 and the passive bevel gear 2 86 are symmetrically arranged so that they can rotate in opposite directions, and at the same time, the bottom end of the driving shaft 83 is rotatably connected with the inner bottom end of the outer fixing frame 5, The top end of the driving shaft 83 extends through the outer fixing frame 5 to the outside and fixes the turntable 84. The other ends of the two connecting rods 87 are fixed with a transmission bevel gear 1 88, and the outside of the transmission bevel gear 1 88 is meshedly connected to the transmission bevel gear 2 89. The transmission bevel gear 2 89 is mainly used to drive the adjustment component 6. When the user rotates the turntable 84, the turntable 84 will cause the driving shaft 83 to drive the active bevel gear 81 to rotate. At this time, the passive bevel gear 1 85 and the passive bevel gear 2 86 meshed with the active bevel gear 81 will be driven at the same time. Since the passive bevel gear 1 85 and the passive bevel gear 2 86 are symmetrically arranged, the rotation directions of the passive bevel gear 1 85 and the passive bevel gear 2 86 are opposite. Through the transmission of the connecting rod 87, the transmission bevel gear 1 88 can drive the transmission bevel gear 2 89 to rotate, so that the two adjustment components 6 can be driven at the same time by rotating the turntable 84, thereby improving the convenience of operation for the staff.

[0039] Optionally, in some embodiments, see Fig.12 and Fig.13 The adjustment component 6 includes a mounting frame 61, which is fixedly mounted on the outer end of the pipeline 1. A movable block 62 is slidably connected to the inner side of the mounting frame 61. A movable groove 63 and two drive grooves 64 are respectively provided at the outer ends of the movable block 62. The movable groove 63 and the two drive grooves 64 are connected. A fixed block 68 is fixedly connected to the bottom end of the mounting frame 61.

[0040] The adjustment component 6 also includes a screw 66, a slide groove 65 is opened on the inner side of the mounting frame 61, a screw sleeve 67 is fixedly connected to the bottom end of the movable block 62, the screw sleeve 67 passes through the slide groove 65, the screw 66 is threadedly connected to the screw sleeve 67, one end of the screw 66 is rotatably connected to the fixed block 68, and the other end of the screw 66 is fixedly connected to the transmission bevel gear 2 89.

[0041] The butterfly valve assembly 9 includes a valve disc 1 91 and a valve disc 2 92. The valve disc 1 91 is fixedly connected to a rotating rod 2 93 on one side close to the valve disc 2 92. The valve disc 2 92 is fixedly connected to a rotating sleeve 94 on one side close to the valve disc 1 91. The rotating rod 2 93 penetrates the rotating sleeve 94. The top ends of the rotating rod 2 93 and the rotating sleeve 94 penetrate the inner wall of the pipeline 1 and extend to the outside. The top end of the rotating sleeve 94 is fixedly connected to a driving rod 1 95. The top end of the rotating rod 2 93 is fixedly connected to a driving rod 2 96. The driving rod 1 95 and the driving rod 2 96 are respectively adapted to the two driving grooves 64.

[0042] The two adjusting components 6 are both installed at the outer end of the pipeline 1. The screw 66 in the adjusting component 6 is fixedly connected to the transmission bevel gear 2 89, so that the adjusting component 6 can be driven by the driving component 8. The mounting frame 61 is fixed to the outer end of the pipeline 1. The inner side of the mounting frame 61 is slidably connected with the movable block 62. The outer end of the movable block 62 is provided with a movable groove 63, and driving grooves 64 are provided on both sides of the movable groove 63. The driving groove 64 is connected with the movable groove 63. A screw sleeve 67 is fixed at the bottom end of the movable block 62. A slide groove 65 is provided on the inner side of the mounting frame 61. The screw sleeve 67 can move inside the slide groove 65. The screw 66 is threadedly connected to the screw sleeve 67, and one end of the screw 66 is rotatably connected to the fixed block 68 fixed to the bottom end of the mounting frame 61. When the screw 66 rotates, the movable block 62 can be driven to move inside the mounting frame 61 through the screw sleeve 67.

[0043] The butterfly valve assembly 9 is mainly composed of a valve plate 1 91 and a valve plate 2 92. A rotating rod 2 93 is fixed on the valve plate 1 91, and a rotating sleeve 94 is fixed on the valve plate 2 92. A through hole is provided in the middle of the rotating sleeve 94 so that the rotating rod 2 93 can pass through, so that the valve plate 1 91 and the valve plate 2 92 can rotate around the rotating rod 2 93. Compared with the traditional single-piece butterfly valve, the two-piece butterfly valve in this scheme can better cooperate with the regulating assembly 6 and the driving assembly 8. A driving rod 1 95 is fixed on the top of the rotating sleeve 94, and the top of the rotating rod 2 93 is fixed to the rotating sleeve 94. The driving rod 96 is fixed on the bottom. The driving rod 95 and the driving rod 96 are in opposite directions, one upward and the other downward. The driving rod 95 and the driving rod 96 are respectively stuck in the two driving grooves 64 on the movable block 62. At the same time, the top of the rotating rod 93 is slidably connected to the movable groove 63. A sealing mechanism matching the valve disc 91 and the valve disc 92 is also required to be provided inside the pipeline 1, for example, a sealing ring is installed on the inner wall of the pipeline 1. When the butterfly valve assembly 9 is closed, the valve disc 91 and the valve disc 92 are against the sealing ring to achieve a sealing effect.

[0044] When one of the safety valve assemblies 2 needs to be repaired or replaced, the channel of the pipeline 1 on the side where the safety valve assembly 2 needs to be replaced can be closed. Since the two butterfly valve assemblies 9 are driven by the driving assembly 8 at the same time, when one butterfly valve assembly 9 is closed, the other butterfly valve assembly 9 will be opened. The two butterfly valve assemblies 9 are always in a state of one closed and the other open. The screw 66 is driven to rotate by the driving assembly 8. At this time, the rotation directions of the two screws 66 are opposite, so that the movement directions of the two movable blocks 62 are opposite. When the movable block 62 moves, it will drive the driving rod 1 95 and the driving rod 2 96 to rotate through the driving groove 64, so that the valve plate 1 91 and the valve plate 2 92 can rotate in opposite directions, so that when the turntable 84 is rotated, the switch state of the two butterfly valve assemblies 9 can be switched at the same time.

[0045] Optionally, in some embodiments, see Fig.14 and Fig.15 The cleaning component 3 includes a bearing 31, which is installed at the outer end of the valve cover 23. A blade group 32 is installed outside the bearing 31. A plurality of fixing plates 33 are fixedly connected to the top of the blade group 32. A plurality of cleaning sponges 34 are fixedly connected to the outer end of the fixing plate 33. The cleaning sponge 34 abuts against the outer end of the spring 25. A plurality of ventilation holes 10 are opened at the outer end of the valve cover 23, and the ventilation holes 10 are arranged at an angle.

[0046] Since the safety valve assembly 2 is usually installed on a steam pipe, and the steam pipe is mostly set in the open air, and the heat of the steam pipe is relatively high, in order to ensure the heat dissipation of the safety valve assembly 2, a hollow design is also adopted, so that the spring 25 will be exposed to the environment, and dirt will easily accumulate on the surface after a long time, and the aligned surface will easily cause corrosion, affecting its performance. The cleaning assembly 3 in this scheme is mainly used to automatically clean the key component of the safety valve assembly 2, the spring 25, the bearing 31 is installed on the valve cover 23, and the abutment ring 29 on the valve stem 24 passes through the bearing 31, but does not contact the inner side of the bearing 31, and the blade assembly is fixed on the outer periphery of the bearing 31. 32, the blade group 32 is composed of a plurality of driving blades, and three fixing plates 33 are fixed on the top of the blade group 32. A cleaning sponge 34 distributed in a matrix is ​​arranged on the inner side of each fixing plate 33, and the cleaning sponge 34 abuts against the outer surface of the spring 25. When the safety valve assembly 2 starts to release pressure, a part of the water vapor will be sprayed onto the blade group 32 through the vent hole 10 opened on the valve cover 23, so that the blade group 32 can rotate. The rotating blade group 32 will drive the cleaning sponge 34 to rub against the surface of the spring 25 to remove the dirt on its surface. At the same time, the steam contains moisture, which can make the cleaning sponge 34 better clean the spring 25.

[0047] The vent hole 10 is arranged at an angle, so that water vapor can be directly sprayed onto the surface of the bearing 31, thereby increasing the thrust on the bearing 31. It is worth mentioning that the self-test component 4 can also be used to actively release water vapor to drive the blade group 32, and active cleaning can also be performed when the safety valve component 2 is not depressurized.

[0048] The implementation principle of a high-temperature steam safety valve in Example 1 of the present application is: When the safety valve assembly 2 is depressurized, the valve disc 28 is reset under the force of the spring 1 25. Before abutting against the valve seat 27, the protrusion at the bottom of the valve disc 28 will first abut against the top of the abutment plate 71. At this time, the force of the spring 75 and the spring 2 78 provides an upward force, thereby generating resistance to the downward movement of the valve disc 28, slowing down its speed, and preventing the valve disc 28 and the valve seat 27 from having a violent collision, thereby preventing the contact surface of the valve disc 28 and the valve seat 27 from being damaged; When it is necessary to replace one of the safety valve assemblies 2, first, it is necessary to close the channel at one end of the pipeline 1 that needs to be replaced, and rotate the turntable 84 to drive the passive bevel gear 1 85 and the passive bevel gear 2 86 that are meshed with the active bevel gear 81 at the same time. At this time, the rotation directions of the passive bevel gear 1 85 and the passive bevel gear 2 86 are opposite. Through the transmission of the connecting rod 87, the transmission bevel gear 1 88 can drive the transmission bevel gear 2 89 to rotate. The transmission bevel gear 2 89 is connected to the screw 66, and the screw 66 is driven to rotate by the driving assembly 8. At this time, the rotation directions of the two screws 66 are opposite, so that the movement directions of the two movable blocks 62 are opposite. When the movable block 62 moves, it will drive the driving rod 1 95 and the driving rod 2 96 to rotate through the driving groove 64, so that the valve plate 1 91 and the valve plate 2 92 can rotate in opposite directions, so that when the turntable 84 is rotated, the switch state of the two butterfly valve assemblies 9 can be switched at the same time, and the safety valve assembly 2 that does not need to be replaced starts to work, so that the steam pipeline always has the safety valve assembly 2 in operation.

[0049] Embodiment 2: The embodiment of the present application provides a method for using a high-temperature steam safety valve, comprising the following steps: S1: Rotate the turntable 84 to make the driving shaft 83 drive the active bevel gear 81 to rotate, and the active bevel gear 81 drives the passive bevel gear 1 85 and the passive bevel gear 2 86 to rotate in opposite directions; S2: The rotating passive bevel gear 1 85 and the passive bevel gear 2 86 drive the screw 66 to rotate through the connecting rod 87, the transmission bevel gear 1 88 and the transmission bevel gear 2 89, so that the screw sleeves 67 in the two sets of adjustment components 6 move in opposite directions; S3: When the screw sleeve 67 drives the movable block 62 to move, the two driving grooves 64 will drive the driving rod 2 96 and the driving rod 1 95 to respectively drive the valve plate 1 91 and the valve plate 2 92 to rotate in opposite directions, and the rotating disk 84 controls the opening of one channel inside the pipeline 1 while the other channel is closed.

Claims

1. A high-temperature steam safety valve, characterized in that: include: A pipeline (1), wherein both ends of the pipeline (1) are provided with a safety valve assembly (2), a cleaning assembly (3) is provided inside the safety valve assembly (2), and a self-test assembly (4) is provided at the top of the safety valve assembly (2); an outer fixing frame (5) is fixedly connected to the outer end of the pipeline (1), a driving assembly (8) is provided inside the outer fixing frame (5), and two butterfly valve assemblies (9) are provided inside the pipeline (1), the two butterfly valve assemblies (9) are used to control the opening and closing of channels at both ends of the pipeline (1), and the tops of the two butterfly valve assemblies (9) are provided with adjustment assemblies (6); A slow-descent assembly (7), the slow-descent assembly (7) comprising an abutment plate (71) and a plurality of annularly equidistantly distributed fixing frames (72), the slow-descent assembly (7) being arranged inside the safety valve assembly (2), the outer end of the abutment plate (71) being fixedly connected to a plurality of annularly distributed spring pieces (75), the spring pieces (75) being arranged in an arc shape, the fixing frame (72) being arranged in a U shape, and the two ends of the fixing frame (72) being fixedly connected to a limit ring (73) and a bottom plate (79) respectively.

2. A high temperature steam safety valve according to claim 1, characterized in that: The safety valve assembly (2) comprises a valve body (21), a valve stem (24) and a valve seat (27); a valve cover (23) is mounted on the top of the valve body (21) by means of bolts; the valve stem (24) penetrates the valve cover (23) and extends into the interior of the valve body (21); a valve flap (28) is fixedly connected to the bottom of the valve stem (24); the valve seat (27) is fixedly mounted on the inner wall of the valve body (21); the valve flap (28) isolates the valve body (21) from the interior of the pipeline (1) by abutting against the valve seat (27); an abutting ring (29) is fixedly connected to the outer end of the valve stem (24); a spring (25) is sleeved on the outer end of the valve stem (24); a pressure relief channel (22) communicating with the interior of the valve body (21) is arranged on the outer end of the valve stem (24); a latch (26) is mounted on the top of the valve stem (24).

3. A high temperature steam safety valve according to claim 2, characterized in that: A fixing rod (74) is fixedly connected to the inner side of the plurality of fixing frames (72); a limiting groove (77) matching the fixing rod (74) is formed at the outer end of the spring sheet (75); the limiting groove (77) is slidably connected to the fixing rod (74); the spring sheet (75) is limited by the fixing rod (74); a plurality of springs (78) are installed between the abutment plate (71) and the bottom plate (79); the abutment plate (71) moves upward and extends to above the limiting ring (73) due to the action of the springs (78); a fixing claw (76) is fixedly connected to the bottom end of the fixing frame (72); the fixing claw (76) is fixedly installed on the inner wall of the valve body (21); the top end of the abutment plate (71) abuts against the bottom end of the valve flap (28).

4. A high temperature steam safety valve according to claim 2, characterized in that: The self-test component (4) comprises a pull rod (41) and a rotating rod (42); the pull rod (41) is rotatably mounted on the outer end of the valve cover (23); one end of the rotating rod (42) is rotatably mounted on the outer end of the valve cover (23) via a rotating shaft (44); the valve stem (24) is connected to the rotating rod (42) via a latch (26); a top block (43) is fixedly connected to the top end of the pull rod (41); the top block (43) abuts against the outer end of the rotating rod (42); the pull rod (41) is rotated so that the top block (43) squeezes the rotating rod (42) to rotate upward.

5. A high temperature steam safety valve according to claim 1, characterized in that: The driving assembly (8) comprises a driving shaft (83), two mounting frames (82) and two connecting rods (87). The two mounting frames (82) are fixedly mounted inside the outer fixing frame (5). The top end of the driving shaft (83) is fixedly connected to a rotating disk (84). The outer end of the driving shaft (83) is fixedly connected to an active bevel gear (81), and the bottom end of the driving shaft (83) is rotatably connected to the bottom end inside the outer fixing frame (5). One end of the two connecting rods (87) respectively passes through the two mounting frames (82), and one end of the two connecting rods (87) is fixedly connected to a passive bevel gear (85) and a passive bevel gear (86). The passive bevel gear (85) and the passive bevel gear (86) are meshedly connected to the active bevel gear (81). The other ends of the two connecting rods (87) are fixedly connected to a transmission bevel gear (88), and the outer ends of the two transmission bevel gears (88) are meshedly connected to a transmission bevel gear (89).

6. A high temperature steam safety valve according to claim 1, characterized in that: The adjustment assembly (6) comprises a mounting frame (61) which is fixedly mounted on the outer end of the pipe (1); a movable block (62) is slidably connected to the inner side of the mounting frame (61); a movable groove (63) and two drive grooves (64) are respectively formed at the outer ends of the movable block (62); the movable groove (63) and the two drive grooves (64) are connected; and a fixed block (68) is fixedly connected to the bottom end of the mounting frame (61).

7. A high temperature steam safety valve according to claim 6, characterized in that: The adjustment assembly (6) further comprises a screw rod (66), a slide groove (65) is provided on the inner side of the first mounting frame (61), a screw sleeve (67) is fixedly connected to the bottom end of the movable block (62), the screw sleeve (67) passes through the slide groove (65), the screw rod (66) is threadedly connected to the screw sleeve (67), one end of the screw rod (66) is rotationally connected to the fixed block (68), and the other end of the screw rod (66) is fixedly connected to the second transmission bevel gear (89).

8. A high temperature steam safety valve according to claim 1, characterized in that: The butterfly valve assembly (9) comprises a valve disc 1 (91) and a valve disc 2 (92); a rotating rod 2 (93) is fixedly connected to a side of the valve disc 1 (91) close to the valve disc 2 (92); a rotating sleeve (94) is fixedly connected to a side of the valve disc 2 (92) close to the valve disc 1 (91); the rotating rod 2 (93) passes through the rotating sleeve (94); the top ends of the rotating rod 2 (93) and the rotating sleeve (94) pass through the inner wall of the pipe (1) and extend to the outside; a driving rod 1 (95) is fixedly connected to the top end of the rotating sleeve (94); a driving rod 2 (96) is fixedly connected to the top end of the rotating rod 2 (93); the driving rod 1 (95) and the driving rod 2 (96) are respectively matched with the two driving grooves (64).

9. A high temperature steam safety valve according to claim 2, characterized in that: The cleaning component (3) comprises a bearing (31), the bearing (31) being mounted on the outer end of the valve cover (23), a blade group (32) being mounted on the outer periphery of the bearing (31), a plurality of fixing plates (33) being fixedly connected to the top end of the blade group (32), a plurality of cleaning sponges (34) being fixedly connected to the outer end of the fixing plate (33), the cleaning sponges (34) being in contact with the outer end of a spring (25), and a plurality of ventilation holes (10) being provided on the outer end of the valve cover (23), the ventilation holes (10) being arranged at an inclination.

10. A method for using a high-temperature steam safety valve according to any one of claims 1 to 9, characterized in that: The steps include: S1: rotating the rotating disk (84) so ​​that the driving shaft (83) drives the active bevel gear (81) to rotate, and the active bevel gear (81) drives the passive bevel gear 1 (85) and the passive bevel gear 2 (86) to rotate in opposite directions; S2: The rotating passive bevel gear 1 (85) and the passive bevel gear 2 (86) drive the screw (66) to rotate through the connecting rod (87), the transmission bevel gear 1 (88) and the transmission bevel gear 2 (89), respectively, so that the screw sleeves (67) in the two sets of adjustment components (6) move in opposite directions; S3: When the screw sleeve (67) drives the movable block (62) to move, the two driving grooves (64) drive the second driving rod (96) and the first driving rod (95) to respectively drive the first valve plate (91) and the second valve plate (92) to rotate in opposite directions, thereby controlling the opening of one channel in the pipeline (1) and the closing of the other channel by rotating the rotating disk (84).

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