A sealed fire-resistant plug valve and detection tool

Abstract

The application relates to the field of valve detection, and discloses a sealed fire-resistant cock valve and a detection tool. The valve assembly comprises a valve rod, which is sequentially and spacedly provided with a gear, a sealing cover plate, an A valve core seat, a B valve core seat and a tail end assembly from a head end to a tail end. The sealed fire-resistant cock valve detection tool can realize continuous one-by-one detection of the valve assembly after assembly, can take out the valve assembly from a conveying belt, adjust the posture of the valve assembly, drive the valve assembly to rotate and cooperate with a detection device to detect the deflection angle between the two valve core seats, and meets the use requirement.

Description

Technical Field

[0001] This invention relates to the field of valve testing, and more specifically, to a sealed fire-resistant plug valve and a testing fixture. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control the flow direction, and regulate and control the parameters (temperature, pressure, and flow rate) of the conveyed medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc.

[0003] Valves are control components in fluid transport systems, with functions such as shut-off, regulation, flow guidance, backflow prevention, pressure stabilization, flow diversion, or overflow pressure relief. Valves used in fluid control systems range from the simplest shut-off valves to various valves used in extremely complex automatic control systems, and their types and specifications are quite numerous.

[0004] There are various types of fire-resistant sealed plug valves with different functions. One type of fire-resistant sealed plug valve requires testing after its components are assembled. Please refer to the attached document. Figure 2 The valve assembly shown needs to have its angle between the two valve core seats on the valve stem checked. Only if the angle requirement is met can it be considered qualified; otherwise, it needs to be returned to the factory for reassembly. Currently, the testing method generally requires transferring the valve assembly to a dedicated angle measuring instrument, which is inefficient and cannot meet current usage requirements. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a sealed fire-resistant plug valve and a testing fixture.

[0006] This invention proposes a sealed fire-resistant plug valve, comprising a valve body and a valve core assembly. The valve core assembly includes a valve stem, from which gears, a sealing cover plate, an A valve core seat, a B valve core seat, and a tail end assembly are sequentially and spaced apart. The gears are fixedly mounted on the end of the valve stem by bolts, the center line of the bolts and the center line of the valve stem are collinear, and the outer end face of the bolts is a plane. Threaded holes for installing the valve core assembly are provided on the A and B valve core seats, and the depth direction of the threaded holes of the A valve core seat is distributed at an angle to the depth direction of the B valve core seat.

[0007] A testing fixture for a sealed fire-resistant plug valve, the testing fixture is used to test the valve core assembly in the sealed fire-resistant plug valve, the testing fixture includes a material transfer device, and an input conveyor belt, a testing device, an output conveyor belt and a return conveyor belt are arranged around the material transfer device; The upper surfaces of the input conveyor belt, output conveyor belt, and return conveyor belt are horizontal. There are cylinder seats evenly spaced on the surface of each of the three belts. The cylinder seats are used to place valve assemblies. The valve assemblies are arranged vertically in the cylinder seats with gears on top. The input conveyor belt and output conveyor belt are distributed opposite each other and their conveying directions are the same. The conveying direction of the return conveyor belt is perpendicular to the conveying direction of the input conveyor belt. The material transfer device includes a rotating frame with a vertical rotating shaft in the middle. The input conveyor belt, detection device, output conveyor belt and return conveyor belt are arranged in a circular array around the rotating shaft. The rotating frame is equipped with material transfer units, and there are four sets of material transfer units arranged in a circular array around the rotating shaft. Furthermore: the rotating shaft is connected to the rotating assembly, which is used to drive the rotating frame to rotate, causing the material transfer unit to rotate sequentially to the corresponding positions of the input conveyor belt, the detection device, the output conveyor belt, and the return conveyor belt; Furthermore, the transfer unit includes a clamping assembly located above the input conveyor belt. The clamping assembly includes spaced-apart support members and clamping arms. The support members have slots a along their length, with one end open. The width of slot a is the same as the diameter of the valve stem in the valve assembly. Slot a is used to insert the valve stem segment located between the sealing cover plate and valve core seat A in the valve assembly. The clamping assembly is connected to an adjustment mechanism, which is used to adjust the distance between the support members and the clamping arms to clamp the valve assembly and adjust the posture of the clamping assembly.

[0008] Furthermore: the end of slot a furthest from the opening is semi-circular.

[0009] Furthermore: the adjustment mechanism includes an adjustment shaft, which is horizontally arranged and rotatably mounted on the rotating frame. The end of the lifting member away from the opening of slot a is fixedly mounted on the hinge shaft, which is hinged to the end of the adjustment shaft extending out of the rotating frame. The hinge shaft and the adjustment shaft are vertically distributed. The clamping arm is fixedly mounted on the adjustment shaft. The hinge shaft is connected to adjustment component A, which is used to drive the hinge shaft to rotate, thereby driving the lifting member to swing around the hinge shaft. The adjustment shaft is connected to adjustment component B, which is used to drive the adjustment shaft to reciprocate 90 degrees.

[0010] Further: Adjustment component A includes a limiting slide groove and a pressure block. The limiting slide groove is arc-shaped, and its centerline is the axis of the adjustment shaft. The limiting slide groove is fixedly installed on the rotating frame, and its opening points towards its centerline. The end of the hinge shaft away from the adjustment shaft has an arc-shaped slide bar, which is fitted into the limiting slide groove. The arc-shaped slide bar follows the same arc direction as the limiting slide groove. The first end sidewall of the limiting slide groove has a notch for the arc-shaped slide bar to enter and exit. The pressure block and the notch of the limiting slide groove are arranged correspondingly. The pressure block is connected to extension component A. The extension direction of extension component A is consistent with the axis of the adjustment shaft. Extension component A is used to drive the pressure block to press against the arc-shaped slide bar, drive the arc-shaped slide bar to rotate the hinge shaft, and press the arc-shaped slide bar into the limiting slide groove. The limiting slide groove is used to maintain the state of the arc-shaped slide bar.

[0011] Furthermore, the adjusting mechanism also includes a clamping assembly, which includes a clamping element arranged in the area between the lifting element and the clamping arm. The clamping element is horizontally arranged, with one end being the clamping end and the other end being the trigger end. The clamping end and the valve stem in the valve assembly, located between the gear and the sealing cover, are arranged correspondingly. A limiting shaft is fixedly connected to the middle of the clamping element. The limiting shaft is arranged vertically and is rotatably mounted on the lifting element. The limiting shaft is connected to a torsion spring, which is used to maintain the clamping element in a state where its clamping end is away from the lifting element. A triggering assembly is installed on the rotating frame at a position corresponding to the trigger end of the clamping element. The triggering assembly abuts against the trigger end of the clamping element, driving the clamping element to rotate towards the lifting element. The clamping element presses the valve stem against the closed end of slot a through abutment engagement.

[0012] Furthermore: the triggering component includes an arc-shaped abutment, the trigger ends of the abutment and the clamping component are arranged correspondingly, the center line of the abutment is the axis of the adjusting shaft, the abutment is connected to the trigger telescopic component, the trigger telescopic component is mounted on the rotating frame, and the trigger telescopic component is used to drive the abutment to move along the axial direction of the adjusting shaft.

[0013] Furthermore, the adjusting mechanism also includes a rack arranged along the axial direction of the adjusting shaft. The rack and the gears in the valve assembly are correspondingly distributed. The rack is connected to the C adjusting component, which is used to drive the rack to move along its length direction to mesh with the gears and drive the valve assembly to rotate axially around the valve stem to achieve the engagement detection device.

[0014] Furthermore: The C adjustment component includes a slide block, which is fixedly connected to a clamping arm. The rack is slidably installed in the slide block along its length. A retaining spring is installed at one end of the slide block to keep the rack in a state away from the gear. A mating block is provided on the back of the rack and extends out of the slide block. A C telescopic component is installed at the position corresponding to the mating block on the rotating frame. The C telescopic component abuts against the mating block to drive the mating block to move.

[0015] The beneficial effects of this invention are as follows: the valve assembly proposed in this invention is used in eccentric double valves; the sealing fire-resistant plug valve testing fixture proposed in this invention can realize continuous one-by-one testing of the valve assembly after assembly; it can remove the valve assembly from the conveyor belt and adjust the posture of the valve assembly; and it can drive its rotation to cooperate with the testing device to detect the deflection angle between the two valve core seats, thus meeting the current usage requirements. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the valve core assembly in a fire-resistant sealing plug valve proposed in this invention; Figure 2 This is a schematic diagram of the structure of a sealing fire-resistant plug valve testing fixture proposed in this invention; Figure 3This is a schematic diagram of the structure of the valve assembly in the material transfer unit of the sealing fire-resistant plug valve testing fixture proposed in this invention; Figure 4 This is a schematic diagram of the structure of the lifting component and clamping arm in the material transfer unit of a sealing fire-resistant plug valve testing fixture proposed in this invention; Figure 5 This is a schematic diagram of the material transfer unit and clamping arm in a sealing fire-resistant plug valve testing fixture proposed in this invention from another perspective. Figure 6 This is a schematic diagram of the structure of the A adjustment component in the material transfer unit of a sealing fire-resistant plug valve testing fixture proposed in this invention; Figure 7 This is a schematic diagram of the internal clamping assembly in the material transfer unit of a sealing fire-resistant plug valve testing fixture proposed in this invention; Figure 8 This is a schematic diagram of the C adjustment component in the material transfer unit of a sealing refractory plug valve testing fixture proposed in this invention; Figure 9 This is a schematic diagram of the structure of the B adjustment component in the material transfer unit of a sealing fire-resistant plug valve testing fixture proposed in this invention.

[0017] In the diagram: 100, valve stem; 110, gear; 120, sealing cover; 130, valve core seat A; 140, valve core seat B; 150, tail assembly; 200, input conveyor belt; 300, detection device; 400, output conveyor belt; 500, return conveyor belt; 600, transfer device; 610, rotating frame; 700, transfer unit; 710, clamping assembly; 711, lifting component; 711a, slot; 712, clamping arm; 720, adjustment assembly A; 7 21. Arc-shaped slide bar; 722. Limiting slide groove; 723. Pressure block; 724. Telescopic assembly A; 730. Clamping assembly; 731. Clamping element; 732. Limiting shaft; 733. Torsion spring; 734. Abutment element; 735. Trigger telescopic assembly; 740. Adjustment assembly C; 741. Slide seat; 742. Mating block; 743. Telescopic assembly C; 744. Holding spring; 750. Hinge shaft; 760. Rack; 770. Adjustment shaft; 771. Adjustment assembly B. Detailed Implementation

[0018] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed merely to enable those skilled in the art to better understand and implement the subject matter described herein, and are not intended to limit the scope, applicability, or examples set forth in the claims. The function and arrangement of the elements discussed may be changed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the various examples. Furthermore, features described in some examples may be combined in other examples.

[0019] Example 1 Reference Appendix Figure 2 In this embodiment, a fire-resistant sealing plug valve is proposed, including a valve body and a valve core assembly. The valve assembly includes a valve stem 100, from which a gear 110, a sealing cover plate 120, an A valve core seat 130, a B valve core seat 140, and a tail end assembly 150 are sequentially and spaced apart. The gear 110 is fixedly installed at the end of the valve stem 100 by bolts. The center line of the bolt is collinear with the center line of the valve stem 100, and the outer end face of the bolt is flat. The A valve core seat 130 and the B valve core seat 140 are provided with threaded holes for installing the valve core assembly. The depth direction of the threaded hole of the A valve core seat 130 is at an angle to the depth direction of the hole of the B valve core seat 140.

[0020] Example 2 Reference Appendix Figure 1 and Figures 3-9 In this embodiment, a testing fixture for a sealed fire-resistant plug valve is proposed. The testing fixture is used to test the valve core assembly in the sealed fire-resistant plug valve. The testing fixture includes a material transfer device 600, and an input conveyor belt 200, a testing device 300, an output conveyor belt 400 and a return conveyor belt 500 are arranged around the material transfer device 600. The upper surfaces of the input conveyor belt 200, output conveyor belt 400, and return conveyor belt 500 are horizontal. There are cylindrical seats evenly spaced on the surfaces of the three belts. The cylindrical seats are used to place valve assemblies. The valve assemblies are arranged vertically in the cylindrical seats with gear 110 on top. The input conveyor belt 200 and output conveyor belt 400 are distributed opposite each other and their conveying directions are the same. The conveying direction of the return conveyor belt 500 is perpendicular to the conveying direction of the input conveyor belt 200. The material transfer device 600 includes a rotating frame 610, with a vertical rotating shaft mounted in the middle of the rotating frame 610. The input conveyor belt 200, the detection device 300, the output conveyor belt 400, and the return conveyor belt 500 are arranged in a circular array around the rotating shaft. The rotating frame 610 is equipped with four sets of material transfer units 700, which are arranged in a circular array around the rotating shaft. The rotating shaft is connected to the rotating assembly, which drives the rotating frame 610 to rotate, causing the material transfer unit 700 to rotate sequentially to the corresponding positions of the input conveyor belt 200, the detection device 300, the output conveyor belt 400, and the return conveyor belt 500. The transfer unit 700 includes a clamping assembly 710, which is located above the input conveyor belt 200. The clamping assembly 710 includes spaced-apart support members 711 and clamping arms 712. The support members 711 have slots 711a along their length, with one end open. The width of the slot 711a is the same as the diameter of the valve stem 100 in the valve assembly. The slot 711a is used to insert the stem segment of the valve stem 100 located between the sealing cover plate 120 and the A valve core seat 130 in the valve assembly. The clamping assembly 710 is connected to an adjustment mechanism, which is used to adjust the distance between the support members 711 and the clamping arms 712 to clamp the valve assembly and adjust the posture of the clamping assembly 710.

[0021] The end of slot 711a furthest from the opening is semi-circular.

[0022] The adjustment mechanism includes an adjustment shaft 770, which is horizontally arranged and rotatably mounted on a rotating frame 610. The end of the lifting member 711 away from the opening of the slot 711a is fixedly mounted on a hinge shaft 750, which is hinged to the end of the adjustment shaft 770 extending out of the rotating frame 610. The hinge shaft 750 and the adjustment shaft 770 are vertically distributed. A clamping arm 712 is fixedly mounted on the adjustment shaft 770. The hinge shaft 750 is connected to an adjustment assembly A 720, which drives the hinge shaft 750 to rotate, thereby driving the lifting member 711 to swing around the hinge shaft 750. The adjustment shaft 770 is connected to an adjustment assembly B 771, which drives the adjustment shaft 770 to reciprocate by ninety degrees.

[0023] Adjustment component A 720 includes a limiting slide groove 722 and a pressure block 723. The limiting slide groove 722 is arc-shaped, and its centerline is the axis of the adjustment shaft 770. The limiting slide groove 722 is fixedly mounted on the rotating frame 610, and its opening points towards its centerline. The hinge shaft 750 has an arc-shaped slide bar 721 at its end away from the adjustment shaft 770. The arc-shaped slide bar 721 is fitted inside the limiting slide groove 722, and its arcuate shape is consistent with that of the limiting slide groove 722. 2. A notch is provided on the first end side wall for the arc-shaped slide bar to enter and exit. The notch of the pressure block 723 and the limiting slide groove 722 are arranged correspondingly. The pressure block 723 is connected to the A telescopic component 724. The telescopic direction of the A telescopic component 724 is consistent with the axial direction of the adjusting shaft 770. The A telescopic component 724 is used to drive the pressure block 723 to press against the arc-shaped slide bar 721, drive the arc-shaped slide bar 721 to drive the hinge shaft 750 to rotate, and press the arc-shaped slide bar 721 into the limiting slide groove 722. The limiting slide groove 722 is used to maintain the state of the arc-shaped slide bar 721.

[0024] The adjusting mechanism also includes a clamping assembly 730, which includes a clamping member 731. The clamping member 731 is arranged in the area between the lifting member 711 and the clamping arm 712. The clamping member 731 is horizontally arranged, with one end being a clamping end and the other end being a triggering end. The clamping end corresponds to the rod segment of the valve stem 100 in the valve assembly located between the gear 110 and the sealing cover plate 120. A limiting shaft 732 is fixedly connected to the middle of the clamping member 731. The limiting shaft 732 is vertically arranged. 32 is rotatably mounted on the pick-up member 711. The limiting shaft 732 is connected to the torsion spring 733. The torsion spring 733 is used to maintain the clamping member 731 in a state where its clamping end is away from the pick-up member 711. A triggering component is installed on the rotating frame 610 at a position corresponding to the triggering end of the clamping member 731. The triggering component abuts against the triggering end of the clamping member 731 to drive the clamping member 731 to rotate in a direction closer to the pick-up member 711. The clamping member 731 presses the valve stem 100 against the closed end of the slot 711a by abutting engagement.

[0025] The triggering assembly includes an arc-shaped abutment 734, with the trigger ends of the abutment 734 and the clamping member 731 arranged correspondingly. The center line of the abutment 734 is the axis of the adjusting shaft 770. The abutment 734 is connected to the trigger telescopic assembly 735, which is mounted on the rotating frame 610. The trigger telescopic assembly 735 is used to drive the abutment 734 to move along the axial direction of the adjusting shaft 770.

[0026] The adjusting mechanism also includes a rack 760, which is arranged axially along the adjusting shaft 770. The rack 760 and the gear 110 in the valve assembly are correspondingly distributed. The rack 760 is connected to the C adjusting component 740, which is used to drive the rack 760 to move along its length direction to mesh with the gear 110 and drive the valve assembly to rotate axially around the valve stem 100 to achieve the engagement of the detection device 300.

[0027] The C-adjustment assembly 740 includes a slide 741, which is fixedly connected to a clamping arm 712. A rack 760 is slidably mounted in the slide 741 along its length. A retaining spring 744 is mounted on one end of the slide 741. The retaining spring 744 is used to keep the rack 760 away from the gear 110. The back of the rack 760 has a mating block 742 that extends out of the slide 741. A C-telescopic assembly 743 is mounted on the rotating frame 610 at a position corresponding to the mating block 742. The C-telescopic assembly 743 abuts against the mating block 742 to drive the mating block 742 to move.

[0028] The working process of the sealing fire-resistant plug valve testing fixture proposed in this embodiment is as follows: First, the material transfer device 600 is positioned at the corresponding positions of the four material transfer units 700, the input conveyor belt 200, the detection device 300, the output conveyor belt 400, and the return conveyor belt 500.

[0029] Among them, a set of material transfer units 700 are placed above the end of the input conveyor belt 200. In the material transfer unit 700, the open end of the pick-up member 711 is arranged downwards at an angle, the arc-shaped slide bar 721 is placed at the notch of the limiting slide groove 722, and the arc-shaped slide bar 721 is tilted outwards. The A telescopic component 724, the trigger telescopic component 735 and the C telescopic component 743 are in the retracted state. At this time, the input conveyor belt 200 transports a set of valve assemblies to its end, and the valve stem 100 in the valve assembly slides into the slot 711a of the pick-up member 711. At this time, the input conveyor belt 200 pauses. A telescopic component 724 is activated, causing the pressure block 723 to extend. The pressure block presses against the arc-shaped slide bar 721, causing the arc-shaped slide bar 721 to fit against the inner wall of the limiting slide groove 722. The arc-shaped slide bar 721 drives the hinge shaft 750 to rotate, and the hinge shaft 750 drives the lifting member 711 to rotate to a horizontal state. At this time, the lifting member 711 abuts against the sealing cover plate 120 in the valve assembly, lifting the valve assembly out of the cylinder seat, and causing the outer end face of the bolt in the valve assembly to fit against the clamping arm 712, thus achieving the purpose of lifting and clamping the valve assembly. At the same time, it can ensure that the valve stem 100 is in a vertical state, which is convenient for subsequent precise adjustment.

[0030] Then, the telescopic assembly 735 is activated, and the abutment 734 extends to abut the trigger end of the clamping member 731, driving the clamping member 731 to rotate around the limiting shaft 732. The clamping end of the clamping member 731 has a pressing slope, which presses against the valve stem 100, applying a force to the valve stem 100 pointing towards the closed end in the slot 711a, so that the valve stem 100 is clamped in the slot 711a to prevent displacement.

[0031] Then, the rotating frame 610 rotates 90 degrees, transferring the valve assembly into the detection device 300. Due to the action of the clamping member 731, the valve assembly remains stationary on the lifting member 711. During the transfer, the B adjusting component 771 is activated. The B adjusting component 771 is a Geneva mechanism. The active dial in the Geneva mechanism rotates, causing the Geneva wheel to rotate 90 degrees. The Geneva wheel drives the adjusting shaft 770 to rotate 90 degrees, which in turn drives the lifting member 711 and the clamping arm 712 to rotate 90 degrees, causing the valve stem 10 to rotate. When the 0 is in a horizontal position, it should be noted that during the rotation, the arc-shaped slide bar 721 slides within the limiting slide groove 722. The limiting slide groove 722 can maintain the relative posture of the arc-shaped slide bar 721, thus ensuring that the relative posture of the lifting component 711 remains unchanged. At the same time, the trigger end of the clamping component 731 slides on the abutment component 734, and the relative position of the trigger end remains unchanged, thus ensuring that the clamping component 731 is in a clamped state. After the rotation is completed, the mating block 742 rotates to the corresponding position of the C telescopic component 743.

[0032] After the transfer unit 700, carrying the horizontally positioned valve assembly, rotates into the detection device 300, the detection assembly in the detection device 300 corresponds to valve core seat 130 and valve core seat 140. Then, the telescopic component C 743 extends, driving the mating block 742 to slide. The mating block 742 drives the rack 760 to slide within the slide block 741, simultaneously stretching the retaining spring 744. The rack 760 contacts and meshes with the gear 110, driving the gear 110 to rotate at least one revolution, passing through the clamping member 7. The limit of 31 prevents the valve assembly from shifting, ensuring accurate detection. Gear 110 drives valve stem 100 to rotate synchronously. Valve stem 100 rotates in slot 711a. During the rotation, the two threaded holes in valve core seat A 130 and valve core seat B 140 rotate sequentially through the detection assembly. The detection assembly scans the mark and calculates the minimum angle difference between the two. After the detection is completed, the rotating frame 610 rotates the transfer unit 700 ninety degrees and stops at the beginning of the output conveyor belt 400.

[0033] If the detection angle meets the requirements, the B adjustment mechanism 771 adjusts the adjustment shaft 770 to reset. At this time, the valve assembly is upright and stays above the cylinder seat at the beginning of the output conveyor belt 400. Then, the telescopic component 735 is triggered to return. The clamping member 731 is reset under the reset action of the torsion spring 733. The clamping member 731 moves away from the valve stem 100 and then the A telescopic component 724 returns. Under the action of gravity, the valve assembly drives the lifting member 711 to swing down. The valve assembly falls into the cylinder seat, and the output conveyor belt 400 starts, driving the valve assembly to disengage from the slot 711a on the lifting member 711.

[0034] If the detection angle does not meet the requirements, the transfer unit 700 will remain clamped on the output conveyor belt 400. When the rotating frame 610 rotates above the return conveyor belt 500, the valve assembly will be placed into the cylinder seat on the return conveyor belt 500. The return action is the same as above. The return conveyor belt 500 will bring the valve assembly back to the workshop for rinsing and assembly.

[0035] By repeating the above steps, each valve assembly to be shipped can be inspected sequentially to ensure that the quality of all valve assemblies meets the requirements.

[0036] The valve assembly proposed in this invention is used in eccentric double valves. The sealing fire-resistant plug valve testing fixture proposed in this invention can realize continuous one-by-one testing of the valve assembly after assembly. It can remove the valve assembly from the conveyor belt and adjust the posture of the valve assembly, and drive it to rotate in conjunction with the testing device to detect the deflection angle between the two valve core seats, thus meeting the current usage requirements.

[0037] The embodiments of this embodiment have been described above with reference to the accompanying drawings. However, this embodiment is not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this embodiment without departing from the spirit of this embodiment and the scope of protection of the claims, and all of these forms are within the protection scope of this embodiment.

Claims

1. A sealed fire-resistant plug valve, characterized in that, The valve assembly includes a valve body and a valve core assembly. The valve core assembly includes a valve stem (100). From its head to its tail, the valve stem (100) is sequentially fitted with a gear (110), a sealing cover plate (120), an A valve core seat (130), a B valve core seat (140), and a tail end assembly (150). The gear (110) is fixedly mounted on the end of the valve stem (100) by bolts. The center line of the bolts is collinear with the center line of the valve stem (100), and the outer end face of the bolts is flat. The A valve core seat (130) and the B valve core seat (140) are provided with... The threaded holes for installing the valve core assembly are arranged at an angle with the depth direction of the threaded holes of valve core seat A (130) and valve core seat B (140); the sealed fireproof plug valve is used in an eccentric double valve, and the valve assembly can be placed in the cylinder seat with the gear (110) on top; the threaded holes of valve core seat A (130) and valve core seat B (140) are provided with markings for scanning by the detection assembly; the sealing cover plate (120) is used to abut against the lifting part, and the outer end face of the bolt is used to fit against the clamping arm.

2. A testing fixture for a fire-resistant plug valve, characterized in that, The system includes a material transfer device (600), around which are arranged an input conveyor belt (200), a detection device (300), an output conveyor belt (400), and a return conveyor belt (500). The upper surfaces of the input conveyor belt (200), output conveyor belt (400), and return conveyor belt (500) are horizontal. Each of the three belts has equally spaced cylindrical supports for holding valve assemblies. The valve assemblies are arranged vertically within the cylindrical supports with gears (110) on top. The input conveyor belt (200) and output conveyor belt (400) are arranged opposite each other. The conveying directions of both are the same, with the conveying direction of the return conveyor belt (500) perpendicular to that of the input conveyor belt (200). The transfer device (600) includes a rotating frame (610), with a vertical rotating shaft mounted in the middle of the rotating frame (610). The input conveyor belt (200), detection device (300), output conveyor belt (400), and return conveyor belt (500) are arranged in a circular array around the rotating shaft. The rotating frame (610) is equipped with transfer units (700), and four sets of transfer units (700) are arranged in a circular array around the rotating shaft. The material transfer unit (700) is arranged in a circular array. A rotating shaft connects to a rotating assembly, which drives the rotating frame (610) to rotate, causing the material transfer unit (700) to rotate sequentially to the corresponding positions of the input conveyor belt (200), the detection device (300), the output conveyor belt (400), and the return conveyor belt (500). The material transfer unit (700) includes a clamping assembly (710), located above the input conveyor belt (200). The clamping assembly (710) includes spaced-apart lifting members (711) and clamping arms (712). 1) A slot (711a) is provided along its length direction. One end of the slot (711a) is open. The width of the slot (711a) is the same as the diameter of the valve stem (100) in the valve assembly. The slot (711a) is used to insert the rod segment of the valve stem (100) in the valve assembly located between the sealing cover plate (120) and the A valve core seat (130). The clamping assembly (710) is connected to the adjustment mechanism. The adjustment mechanism is used to adjust the distance between the lifting member (711) and the clamping arm (712) to realize the clamping of the valve assembly and adjust the posture of the clamping assembly (710).The adjustment mechanism includes an adjustment shaft (770), which is horizontally arranged and rotatably mounted on a rotating frame (610). One end of the lifting member (711) away from the opening of the slot (711a) is fixedly mounted on a hinge shaft (750), which is hinged to the end of the adjustment shaft (770) extending out of the rotating frame (610). The hinge shaft (750) and the adjustment shaft (770) are vertically distributed. A clamping arm (712) is fixedly mounted. Mounted on the adjusting shaft (770), the hinge shaft (750) is connected to the A adjusting assembly (720), which drives the hinge shaft (750) to rotate, thereby causing the lifting member (711) to swing around the hinge shaft (750). The adjusting shaft (770) is connected to the B adjusting assembly (771), which drives the adjusting shaft (770) to rotate back and forth by ninety degrees. The adjusting mechanism also includes a rack (760), which moves along... The axial arrangement of the adjusting shaft (770) corresponds to the distribution of the rack (760) and the gear (110) in the valve assembly. The rack (760) is connected to the C adjusting assembly (740), which drives the rack (760) to move along its length direction to mesh with the gear (110) and drive the valve assembly to rotate axially around the valve stem (100) to achieve engagement with the detection device (300). The detection device (300) is equipped with a detection assembly. The components and valve core seats A (130) and B (140) are arranged accordingly. After the rack (760) meshes with the gear (110), it drives the gear (110) to rotate at least one revolution. The gear (110) drives the valve stem (100) to rotate synchronously. The valve stem (100) rotates in the slot (711a). The two threaded holes in valve core seats A (130) and B (140) rotate sequentially through the detection component. The detection component scans the mark and calculates the minimum angle difference between the two.

3. The testing fixture for a fire-resistant plug valve according to claim 2, characterized in that, The end of the slot (711a) away from the opening is semi-circular.

4. A testing fixture for a fire-resistant plug valve according to claim 2 or 3, characterized in that, Adjustment component A (720) includes a limiting slide groove (722) and a pressure block (723). The limiting slide groove (722) is arc-shaped, and its centerline is the axis of the adjustment shaft (770). The limiting slide groove (722) is fixedly installed on the rotating frame (610), and the groove opening of the limiting slide groove (722) points to its centerline. The hinge shaft (750) has an arc-shaped slide bar (721) at one end away from the adjustment shaft (770). The arc-shaped slide bar (721) is assembled in the limiting slide groove (722), and the arc-shaped direction of the arc-shaped slide bar (721) is consistent with that of the limiting slide groove (722). 22) A notch is provided on the first end side wall for the arc-shaped slide bar to enter and exit. The notches of the pressure block (723) and the limiting slide groove (722) are arranged accordingly. The pressure block (723) is connected to the A telescopic component (724). The telescopic direction of the A telescopic component (724) is consistent with the axial direction of the adjusting shaft (770). The A telescopic component (724) is used to drive the pressure block (723) to press against the arc-shaped slide bar (721), drive the arc-shaped slide bar (721) to drive the hinge shaft (750) to rotate, and press the arc-shaped slide bar (721) into the limiting slide groove (722). The limiting slide groove (722) is used to maintain the state of the arc-shaped slide bar (721).

5. The testing fixture for a fire-resistant plug valve according to claim 4, characterized in that, The adjusting mechanism also includes a clamping assembly (730), which includes a clamping member (731). The clamping member (731) is arranged in the area between the lifting member (711) and the clamping arm (712). The clamping member (731) is arranged horizontally, with one end being the clamping end and the other end being the triggering end. The clamping end and the valve stem (100) in the valve assembly are arranged correspondingly between the gear (110) and the sealing cover plate (120). A limiting shaft (732) is fixedly connected to the middle of the clamping member (731). The limiting shaft (732) is arranged vertically. 32) Rotatably mounted on the pick-up member (711), the limiting shaft (732) is connected to the torsion spring (733), the torsion spring (733) is used to maintain the clamping member (731) in a state where its clamping end is away from the pick-up member (711), the rotating frame (610) is equipped with a triggering component at the position corresponding to the triggering end of the clamping member (731), the triggering component abuts against the triggering end of the clamping member (731) to drive the clamping member (731) to rotate towards the pick-up member (711), the clamping member (731) presses the valve stem (100) against the closed end of the slot (711a) by abutting engagement.

6. The testing fixture for a fire-resistant plug valve according to claim 5, characterized in that, The triggering assembly includes an arc-shaped abutment (734), with the trigger ends of the abutment (734) and the clamping member (731) arranged correspondingly. The center line of the abutment (734) is the axis of the adjusting shaft (770). The abutment (734) is connected to the trigger telescopic assembly (735), which is mounted on the rotating frame (610). The trigger telescopic assembly (735) is used to drive the abutment (734) to move axially along the adjusting shaft (770).

7. The testing fixture for a fire-resistant plug valve according to claim 2, characterized in that, The C adjustment assembly (740) includes a slide (741), which is fixedly connected to a clamping arm (712). A rack (760) is slidably installed in the slide (741) along its length. A retaining spring (744) is installed at one end of the slide (741). The retaining spring (744) is used to keep the rack (760) away from the gear (110). A mating block (742) is provided on the back of the rack (760). The mating block (742) extends out of the slide (741). A C telescopic assembly (743) is installed at the position corresponding to the mating block (742) on the rotating frame (610). The C telescopic assembly (743) abuts against the mating block (742) to drive the mating block (742) to move.

8. The testing fixture for a fire-resistant plug valve according to claim 2, characterized in that, B adjustment component (771) is a Geneva mechanism.

Images