A marine high-precision valve air tightness automatic detection equipment

Abstract

The present invention relates to the field of valve detection technology, and specifically proposes a high-precision marine valve air tightness automatic detection equipment; the supporting platform comprises a supporting platform, the supporting platform is provided with a channel for introducing a circulating medium vertically along the central axis, the table end of the supporting platform is a lower sealing disk for supporting and placing and sealing one end of the valve, and an upper sealing disk is provided in conjunction with the lower sealing disk for pressing and sealing the other end of the valve; a slow bracket for auxiliary support of the valve is vertically penetrated and slidably installed on the lower sealing disk; the equipment also includes a clamping mechanism for laterally clamping and positioning the valve and pressing and sealing the valve between the upper sealing disk and the lower sealing disk; the detection equipment provided by the present invention is used for performing air tightness detection on marine butterfly valves, avoiding the problem of detection distortion and performance misjudgment caused by poor sealing between the sealing layer and the sealing disk in the butterfly valve in the existing detection operation process, ensuring the normal and smooth progress of the detection, and reducing the misjudgment rate and the misjudgment repair rate of the butterfly valve.

Description

Technical Field

[0001] The invention relates to the technical field of valve detection, and particularly proposes a high-precision automatic air tightness detection device for marine valves. Background Art

[0002] The ship's hull is equipped with various fluid medium piping systems, such as ballast water system, cooling water system, fire protection system, fuel system, etc. In these piping systems, various high-precision valves need to be installed to realize the functional control of the pipelines. Among them, butterfly valve is a common valve type that can realize fast opening and closing functions. It is widely used in the ship's cooling water system, ventilation system and fire protection system.

[0003] After the butterfly valve is manufactured, it is important to test its air tightness. Reliable and effective air tightness can ensure the sealing and safety of the butterfly valve when used in the pipeline system. Existing technology generally uses testing equipment that matches the specific model to test the butterfly valve for air tightness. The testing equipment is equipped with a sealing disc that matches the butterfly valve for port sealing, and a corresponding clamping mechanism for clamping the port seal. In addition, the sealing disc is generally provided with a sealing groove that matches the valve sealing layer. The valve sealing layer is mostly made of elastic rubber. During testing, the valve sealing layer needs to be embedded in the sealing groove.

[0004] During the inspection process, one side port of the valve needs to be placed on a sealing disc. Considering that marine butterfly valves are generally large in size and heavy, one end of the butterfly valve is directly placed on the sealing disc and needs to be positioned with the help of the side clamp positioning mechanism assembled in the equipment to enable the sealing layer to be embedded in the sealing groove. Such operation has certain disadvantages for air tightness inspection. Under a certain probability, it will cause distortion of the inspection results and form misjudgment. Specifically, since the butterfly valve is directly placed on the sealing disc and is positioned and aligned with the help of the side clamp positioning mechanism, and the sealing layer is easy to deform and has elasticity, the first First, when the butterfly valve is placed on the sealing disc, if the sealing layer is not aligned with the sealing groove, the sealing layer forms an elastic support contact, and the butterfly valve may be in an inclined position; secondly, when the side clamp is positioned, it mainly pushes the butterfly valve to move horizontally, and during the horizontal movement, the sealing layer is forced to embed into the sealing groove. When the butterfly valve is in an inclined state, the sealing layer moves laterally and deforms, which may cause the sealing layer to not be completely aligned and embedded in the sealing groove, thereby reducing the sealing fit between the sealing disc and the valve sealing layer, and even causing airtightness failure, affecting the normal detection process and the correct judgment of the detection results. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a high-precision marine valve air tightness automatic detection device for solving the problems mentioned in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a marine high-precision valve air tightness automatic detection equipment, including a support platform, the support platform is provided with a channel for introducing circulating medium vertically along the central axis, the table end of the support platform is a lower sealing disk for supporting and sealing one end of the valve, and an upper sealing disk is provided in conjunction with the lower sealing disk for pressing and sealing the other end of the valve; a buffer bracket is vertically penetrated and slidably installed on the lower sealing disk for auxiliary support of the valve.

[0007] The device also includes a clamping mechanism for laterally clamping and positioning the valve and pressing and sealing the valve between the upper sealing disk and the lower sealing disk; the clamping mechanism includes a lifting platform located below the buffer bracket, and a plurality of clamping parts are horizontally slidably installed on the lifting platform. The lifting platform is also equipped with a driving component for driving the plurality of clamping parts to synchronously clamp and position the valve.

[0008] During the inspection process, when the lifting platform is at the highest position, the valve is placed on the slow support, and the bottom end of the slow support is supported on the upper end surface of the lifting platform; after the driving component drives multiple clamps to clamp the valve to position it, the slow support drives the valve to descend synchronously with the lifting platform; when the lifting platform descends to the lowest position, it is separated from the slow support, the slow support is overlapped on the lower sealing plate, and the upper end surfaces of the slow support and the lower sealing plate are flush, and the valve is pressed and sealed between the upper sealing plate and the lower sealing plate.

[0009] Preferably, a plurality of avoidance grooves are provided on the circumference of the upper end surface of the lower sealing disk, and a vertical guiding groove is provided in each avoidance groove; the slow bracket includes a base ring located between the lower sealing disk and the lifting platform, and a plurality of sliders are fixed on the upper end surface of the base ring, which are slidably installed in the plurality of guide grooves in a one-to-one manner, and a support block for supporting one end of the valve is fixed horizontally on the top of each slider, and the avoidance groove is matched with the support block in the relative position, and when the support block is overlapped in the avoidance groove, the upper end surface of the support block is flush with the upper end surface of the lower sealing disk.

[0010] Preferably, sealing grooves which cooperate with and are embedded in the sealing layer in the valve are provided on the sealing contact end surfaces of both the lower sealing disc and the upper sealing disc with the valve.

[0011] Preferably, the supporting platform further comprises a column fixed to the bottom end of the lower sealing plate; the column vertically passes through the base ring and the lifting platform, and the lifting platform is vertically slidably mounted on the column.

[0012] Preferably, the clamping member includes a slide plate horizontally slidably mounted on the bottom end surface of the lifting platform, a clamping block seat is fixed on the slide plate, a side clamping block for laterally clamping the valve is fixed on the clamping block seat, and a pressure block is fixed on the top end of the side clamping block for downward pressure contact with the upper end surface of the upper sealing disk.

[0013] Preferably, the driving assembly includes an articulated seat that is driven to lift and slide and is installed on the column. The articulated seat is hinged with multiple connecting rods that correspond one-to-one with multiple clamping parts, and the other end of the connecting rod is hinged on the slide at the corresponding position.

[0014] Preferably, the side clamping block is cylindrical, and a screw is fixed to the bottom end of the side clamping block and is threadedly connected to the clamping block seat.

[0015] Preferably, the end surfaces of both the lower sealing disc and the upper sealing disc that are in sealing contact with the valve are provided with protrusions that protrude relative to the end surfaces and can extend inwardly to press against the side wall of the inner cavity of the valve port.

[0016] Preferably, a positioning portion for cooperating with the valve for positioning is provided on the end surface of the upper sealing disc that is in sealing contact with the valve.

[0017] The above technical solution has the following advantages or beneficial effects: the present invention provides a high-precision marine valve air tightness automatic detection device for performing air tightness detection on marine butterfly valves, and adopts the cooperation of the upper sealing disc and the lower sealing disc to realize the sealing of the two channel ports of the butterfly valve. A buffer bracket for auxiliary support of the butterfly valve is installed on the lower sealing disc. The buffer bracket can prevent the butterfly valve from being placed directly on the lower sealing disc and can realize horizontal placement. The side clamp positioning structure in the clamping mechanism can pre-position the butterfly valve so that the sealing part of the sealing liner is aligned with the sealing ring of the lower sealing disc. In addition, the clamping structure of the clamping mechanism can drive the butterfly valve to descend synchronously in a horizontally placed state through the buffer bracket, and can align the sealing part of the sealing liner with the sealing ring of the lower sealing disc, thereby ensuring the sealing effect of the sealing liner and the lower sealing disc, avoiding the problem of poor sealing cooperation between the sealing layer in the butterfly valve and the sealing disc in the existing detection operation process, causing detection distortion and performance misjudgment, ensuring the normal and smooth progress of the detection, and reducing the misjudgment rate and the misjudgment repair rate of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention and its features, configurations and advantages will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings, in which like reference numerals indicate like parts throughout the drawings, which are not drawn to scale, with emphasis placed on illustrating the subject matter of the present invention.

[0019] Figure 1 The present invention is a three-dimensional diagram of a marine high-precision valve air tightness automatic detection device in working condition.

[0020] Figure 2 The present invention is a main view of a marine high-precision valve air tightness automatic detection device in a working state.

[0021] Figure 3The present invention is a top view of a high-precision automatic air tightness detection device for marine valves in working condition.

[0022] Figure 4 yes Figure 3 Cross-sectional view of AA in the figure.

[0023] Figure 5 It is a three-dimensional structural diagram of a marine butterfly valve.

[0024] Figure 6 It is a three-dimensional diagram of the slow bracket connected to the supporting platform.

[0025] Figure 7 It is a three-dimensional structural diagram of the support platform.

[0026] Figure 8 It is a three-dimensional structural diagram of the buffer bracket.

[0027] Figure 9 It is a three-dimensional structural diagram of the upper closure plate.

[0028] Figure 10 The present invention is a schematic diagram of the three-dimensional structure of a marine high-precision valve air tightness automatic detection device provided by the present invention.

[0029] Figure 11 It is a three-dimensional structural diagram of the clamping mechanism.

[0030] In the figure: 1. Support platform; 11. Lower sealing plate; 111. Avoidance groove; 112. Guide groove; 12. Column; 13. Chassis; 2. Slow bracket; 21. Base ring; 22. Slider; 23. Support block; 3. Upper sealing plate; 31. Positioning pin; 4. Clamping mechanism; 41. No. 1 hydraulic cylinder; 42. Lifting platform; 421. Sleeve; 422. Slide rail; 43. Clamping piece; 431. Slide plate; 432. Clamping block seat; 433. Side clamping block; 4331. Screw; 434. Pressing block; 44. Drive assembly; 441. No. 2 hydraulic cylinder; 442. Articulated seat; 4421. Connecting plate; 443. Connecting rod; 5. Butterfly valve; 51. Valve seat; 511. Flange; 512. Stuffing box; 52. Sealing liner; 53. Valve plate; 531. Valve stem. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1 As shown, a marine high-precision valve air tightness automatic detection device, in the present invention, the detection device is used to perform air tightness detection on a marine butterfly valve 5, the butterfly valve 5 structure is as follows Figure 5 As shown, it is mainly composed of a valve seat 51, a sealing liner 52 and a valve plate 53. The valve seat 51 is formed by integral casting. The two ports of the valve seat 51 channel are flanges 511 for easy docking and installation. A stuffing box 512 is provided on the side wall of the valve seat 51. The valve plate 53 is located in the inner cavity of the valve seat 51 channel to control the on-off of the valve. The valve stem 531 passes through the stuffing box 512. The sealing liner 52 is built into the inner wall of the channel of the valve seat 51 as a sealing layer, and the sealing liner 52 extends and wraps around the two flange 511 ports.

[0034] like Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 and Figure 7 As shown, the detection equipment includes a support platform 1, which includes a disc-shaped lower sealing plate 11, a cylindrical column 12 welded to the bottom end of the lower sealing plate 11, and a disc-shaped bottom plate 13 welded to the bottom end of the column 12. The lower sealing plate 11, the column 12 and the bottom plate 13 are coaxially installed, and the support platform 1 is vertically penetrated along the central axis with a channel for passing the liquid or gas for detection. In this embodiment, water is used as a medium for detecting the airtightness status of the butterfly valve 5. A water pipe can be sealed and fixedly installed in the channel extending from the end of the bottom plate 13 to the support platform 1. The water pipe is connected to an external water system. A booster pump system is provided in the water system. The booster pump system is provided in a pressure sensor and a digital pressure gauge. The water pressure in the booster pump system is detected by the pressure sensor and converted into an electrical signal, which is transmitted to the digital pressure gauge after processing, and finally the pressure value is displayed in digital form.

[0035] like Figure 5 、 Figure 7 and Figure 9As shown, in order to achieve sealing of the two flange 511 ends of the butterfly valve 5 during inspection, an upper sealing disc 3 for sealing the other end of the valve is also provided in conjunction with the lower sealing disc 11; the upper sealing disc 3 is an independent structure that can be crimped onto the flange 511 end of the butterfly valve 5 or directly removed. The sealing contact end surfaces between the lower sealing disc 11 and the upper sealing disc 3 and the valve are both provided with sealing grooves that fit into the sealing liner 52. The sealing grooves are annular groove structures composed of multiple concentric annular grooves. The end surfaces of the lower sealing disc 11 and the upper sealing disc 3 that are in sealing contact with the valve are both provided with raised portions that protrude relative to the end surfaces and can extend inwards and press against the side wall of the inner cavity of the valve port. In the present invention, the raised portion is in the shape of a truncated cone and is located in the ring in the sealing groove, which is equivalent to the pipe flange that docks with the upper flange 511 end of the butterfly valve 5. The protruding annular portion of the disc and the raised portion extend into the inner cavity of the valve port and are directly pressed against the sealing lining 52. In addition, it should be noted that the purpose of the airtightness test is to detect the airtightness reliability of the butterfly valve 5 in the actual assembly and use of the pipeline system. Therefore, the upper sealing disc 3 and the lower sealing disc 11 can be regarded as the flange interface parts of the two pipes docked with the two flanges 511 of the butterfly valve 5, and the sealing grooves of the upper sealing disc 3 and the lower sealing disc 11 can be considered to be consistent with the sealing groove structure of the flange interface part in the commonly used docking pipe. The detection equipment provided by the present invention is specifically designed for air tightness detection of a specific model of butterfly valve 5, that is, the upper sealing disk 3 and the lower sealing disk 11 are both matched with the sealing liner 52, and a plurality of evenly distributed bolt holes are opened on the flange 511. A plurality of positioning pins 31 corresponding to the plurality of bolt holes on the flange 511 are welded on the end surface of the upper sealing disk 3 that contacts the valve seal. When the upper sealing disk 3 is placed on the flange 511 end of the butterfly valve 5, the positioning pins 31 can be inserted into the bolt holes of the flange 511 to achieve rapid positioning, and then the wrapped end of the sealing liner 52 at the port position of the flange 511 is aligned with the sealing groove of the upper sealing disk 3.

[0036] like Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, a buffer bracket 2 is vertically penetrated and slidably installed on the lower sealing disk 11 for auxiliary support of the flange 511 on one side of the valve. Four avoidance grooves 111 are evenly distributed on the circumference of the upper end surface of the lower sealing disk 11, and each avoidance groove 111 is provided with a vertical guiding groove 112; the buffer bracket 2 includes a base ring 21 located below the lower sealing disk 11, and the column 12 passes through the base ring 21; four sliders 22 are welded on the upper end surface of the base ring 21 and are slidably installed in the four guide grooves 112 in a one-to-one manner, and a support block 23 for supporting the flange 511 is horizontally welded to the top of each slider 22, and the avoidance groove 111 is arranged in coordination with the support block 23 in the relative position. When the support block 23 is overlapped in the avoidance groove 111, the upper end surface of the support block 23 is flush with the upper end surface of the lower sealing disk 11. By Figure 6It can be seen that the support blocks 23 are distributed on the periphery of the sealing groove of the lower sealing disk 11. Therefore, during the detection process, the wrapped part of the sealing liner 52 at the end of the flange 511 can avoid the four support blocks 23, and the flat end of the flange 511 of the butterfly valve 5 can be directly placed on the four support blocks 23, which can ensure that the butterfly valve 5 is supported horizontally to avoid tilting.

[0037] like Figure 2 、 Figure 4 、 Figure 10 and Figure 11 As shown, the detection equipment also includes a clamping mechanism 4 for laterally clamping and positioning the valve and pressing and sealing the upper and lower ends of the valve between the upper sealing disk 3 and the lower sealing disk 11; the clamping mechanism 4 includes a No. 1 hydraulic cylinder 41 vertically fixed on the chassis 13 and a lifting platform 42 horizontally fixed at the output end of the No. 1 hydraulic cylinder 41, the lifting platform 42 is located below the base ring 21, and a spline is provided on the column 12. The lifting platform 42 is disc-shaped, and a sliding sleeve 421 is coaxially welded on the bottom end face of the lifting platform 42. The lifting platform 42 is slidably fitted on the column 12 through the sliding sleeve 421; four slide rails 422 are welded on the bottom end face of the lifting platform 42, and the guiding direction of the slide rails 422 is along the radial direction of the lifting platform 42. A clamping part 43 is correspondingly installed on each slide rail 422, and the clamping part 43 includes a slide plate 431 slidably installed in the slide rail 422, and the slide plate 431 is away from the lifting platform 42 The end of the center is welded with a clamping block seat 432, and the top of the clamping block seat 432 is equipped with a side clamping block 433 for clamping the valve laterally. The side clamping block 433 is cylindrical, and the bottom of the side clamping block 433 is welded with a screw 4331 that is threadedly connected to the clamping block seat 432. The top of the side clamping block 433 is fixed with a pressure block 434 that is in contact with the upper end surface of the upper sealing disk 3 by bolts; when assembling the pressure clamp 43, first screw the side clamping block 433 through the screw 4331 to Turn and tighten it on the clamping block seat 432, and then fix the pressure block 434 on the side clamping block 433. On the one hand, the pressure block 434 can be located above the upper sealing plate 3 after being locked. On the other hand, the height of the pressure block 434 can be adjusted when the screw 4331 is tightened, so that when the pressure block 434 is finally pressed down on the top of the upper sealing plate 3, the butterfly valve 5 can be pressed between the upper sealing plate 3 and the lower sealing plate 11. When adjusting, pay attention to ensure that the four pressure blocks 434 are at the same height.

[0038] like Figure 2 、 Figure 4 and Figure 11As shown, the lifting platform 42 is also equipped with a driving assembly 44 that drives four clamping members 43 to synchronously side-clamp and position the valve; the driving assembly 44 includes a hinged seat 442 that is vertically slidably mounted on the column 12, and a No. 2 hydraulic cylinder 441 is vertically fixed on the lifting platform 42 by bolts, and a connecting plate 4421 is horizontally welded on the hinged seat 442, and the connecting plate 4421 is fixed to the output end of the No. 2 hydraulic cylinder 441 by bolts; four connecting rods 443 corresponding to the four clamping members 43 are hinged on the hinged seat 442, and the other end of the connecting rod 443 is hinged to the slide 431 at the corresponding position.

[0039] like Figure 1 and Figure 2 As shown, during the inspection process, when the lifting platform 42 is in the highest position, the valve is placed on the slow bracket 2, and the bottom end of the slow bracket 2 is supported on the upper end surface of the lifting platform 42; after the driving component 44 drives the four clamping parts 43 to side-clamp the valve, the lifting platform 42 descends from the highest position, and the slow bracket 2 drives the valve to descend synchronously with the lifting platform 42; when the lifting platform 42 descends to the lowest position, the lifting platform 42 and the slow bracket 2 are in a separated state, the slow bracket 2 is overlapped on the lower sealing disk 11, and the upper end surface of the slow bracket 2 is flush with the upper end surface of the lower sealing disk 11, and the upper and lower ends of the valve are pressed and sealed between the upper sealing disk 3 and the lower sealing disk 11.

[0040] The present invention provides a high-precision automatic air tightness detection device for marine valves. In this embodiment, water is used as the circulating medium to detect the air tightness of the butterfly valve 5. During actual testing, it is necessary to detect the air tightness of multiple locations, including the ends of the two flanges 511, between the valve plate 53 and the sealing liner 52, and between the valve stem 531 and the stuffing box 512. Since the valve stem 531 on the valve plate 53 passes through the stuffing box 512, and the valve plate 53 controls the on-off of the two flange 511 ports, during actual testing, it is necessary to first perform a first round of air tightness testing on the ends of the two flanges 511 and between the valve stem 531 and the stuffing box 512. When the first round of testing confirms that the air tightness is valid, a second round of testing can be performed to detect the air tightness between the valve plate 53 and the sealing liner 52. The specific testing process can be seen as follows:

[0041] The first round of air tightness test is carried out to test the air tightness between the two flanges 511 ends of the butterfly valve 5 and the valve stem 531 and the stuffing box 512. Specifically: place the flange 511 of one end of the butterfly valve 5 flat on the four supporting blocks 23, and then align the positioning pins 31 of the upper sealing disc 3 and insert them into the bolt holes of the upper flange 511, so that the upper sealing disc 3 is snap-fitted and placed on the upper flange 511. At this time, due to the support of the sealing liner 52, the lower end surface of the upper sealing disc 3 is not completely pressed and contacted with the upper flange 511. On the end surface, then, start the No. 2 hydraulic cylinder 441 to drive the articulated seat 442 to slide down along the column 12, thereby pulling the slide plate 431 along the slide rail 422 to slide toward the center of the lifting platform 42 through the connecting rod 443, and then with the cooperation of the four side clamping blocks 433, the clamping butterfly valve 5 is automatically pushed to complete the side clamp positioning, and the central axis of the flange 511 is automatically aligned with the central axis of the lower sealing disk 11, so that the sealing groove of the lower sealing disk 11 is aligned with the sealing part of the sealing liner 52 located at the lower flange 511.

[0042] Then, the No. 1 hydraulic cylinder 41 is started, driving the lifting platform 42 to descend. When the lifting platform 42 is in a supporting state for the base ring 21, the slow bracket 2 is synchronously lowered with the descent of the lifting platform 42. At the same time, the butterfly valve 5 is synchronously lowered with the descent of the slow bracket 2 while maintaining the side clamp positioning. When the slow bracket 2 is lowered until the support block 23 falls into the avoidance groove 111 and overlaps with the end surface of the avoidance groove 111, the slow bracket 2 cannot continue to descend, and the flange 511 below the butterfly valve 5 falls on the end surface composed of the upper end surface of the lower sealing disk 11 and the four support blocks 23. The lifting platform 42 is It continues to descend and separates from the base ring 21, and the pressure block 434 begins to press on the top surface of the upper sealing disk 3. As it continues to descend until the output rod of the No. 1 hydraulic cylinder 41 is fully retracted, the upper and lower flanges 511 of the butterfly valve 5 are pressed between the upper sealing disk 3 and the lower sealing disk 11, and the two ends of the sealing liner 52 are correspondingly pressed and embedded in the sealing grooves of the upper sealing disk 3 and the lower sealing disk 11. Subsequently, the valve plate 53 is opened to make the butterfly valve 5 in a fully open state. At this time, the sealing of the two flanges 511 ends of the butterfly valve 5 by the upper sealing disk 3 and the lower sealing disk 11 constitutes a fully sealed state by default.

[0043] Subsequently, water is injected into the closed inner cavity of the butterfly valve 5 through the piping system at the chassis 13 until it is completely filled, and the water is pressurized to a set pressure value by the booster pump system in the piping system. The pressure value is detected by the pressure sensor in the booster pump system and displayed on the digital pressure gauge. After reaching the set pressure value, the pressure is maintained, and the outside of the butterfly valve 5 can be immediately purged with an air gun to clean up any water mist and water droplets that may exist on the outside of the butterfly valve 5 to avoid misjudgment. The pressure is then maintained continuously. After the set pressure holding time is reached, the pressure on the digital pressure gauge is observed to see whether there is a significant drop in pressure, and whether there is water overflow at the detection position of the outside of the butterfly valve 5. When the pressure on the digital pressure gauge decreases significantly and water overflow is observed, it can be seen that there is a problem with the air tightness of the overflow position and it does not meet the standard. When the pressure value on the digital pressure gauge changes slightly and is within the design allowable range, and no water overflow is observed, it means that the air tightness test of the butterfly valve 5 at the two flange 511 ends and between the valve stem 531 and the stuffing box 512 has met the standard.

[0044] After passing the first round of air tightness testing, if the air tightness test meets the standards, the second round of testing can be carried out directly. If the air tightness test does not meet the standards, the product that can be repaired can be repaired, and the product that cannot be repaired can be directly scrapped. After the repair test is verified to be qualified, the second round of testing can be carried out.

[0045] A second round of air tightness testing is carried out to test the air tightness between the valve plate 53 and the sealing liner 52. The operating process of the second round of testing is basically the same as that of the first round of testing and will not be repeated here. The difference is that in the second round of testing, the upper sealing disk 3 mainly plays a downward pressing and tightening role on the butterfly valve 5, and the sealing of the upper flange 511 end is not considered. After the butterfly valve 5 is positioned and pressed downward by the side clamp, the valve plate 53 needs to be closed so that the inner cavity space of the butterfly valve 5 below the valve plate 53 is in a closed state by default. During the test, water is injected into the inner cavity. After the pressure maintenance is completed, the pressure value of the digital pressure gauge is observed. If the pressure value decreases significantly, it means that the air tightness between the valve plate 53 and the sealing liner 52 is invalid. When the pressure value remains basically unchanged or the reduction value is within the design allowable range, it means that the air tightness is reliable and effective.

[0046] The present invention provides a high-precision marine valve air tightness automatic detection device for testing the air tightness of a marine butterfly valve 5. The upper sealing disc 3 and the lower sealing disc 11 are used to cooperate to achieve the sealing of the two channel ports of the butterfly valve 5. A buffer bracket 2 is installed on the lower sealing disc 11 to provide auxiliary support for the butterfly valve 5. The buffer bracket 2 can prevent the butterfly valve 5 from being placed directly on the lower sealing disc 11 and can be placed horizontally. The side clamp positioning structure in the clamping mechanism 4 can pre-position the butterfly valve 5 so that the sealing part of the sealing liner 52 is aligned with the sealing ring of the lower sealing disc 11. Alignment. In addition, the clamping structure of the clamping mechanism 4 can drive the butterfly valve 5 to descend synchronously in a horizontally placed state through the slow bracket 2, and the sealing part of the sealing liner 52 can be aligned and inserted into the sealing ring of the lower sealing disk 11, ensuring the sealing effect of the sealing liner 52 and the lower sealing disk 11, avoiding the problem of detection distortion and performance misjudgment caused by the inadequate sealing between the sealing layer and the sealing disk in the butterfly valve 5 in the existing detection operation process, ensuring the normal and smooth progress of the detection, and reducing the misjudgment rate and the misjudgment repair rate of the butterfly valve 5.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0049] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention that do not depart from the content of the technical solution of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A high-precision marine valve air tightness automatic detection device, characterized by: The support platform (1) includes a support platform (1) having a passage for introducing a circulating medium vertically extending along a central axis, a lower sealing disc (11) for supporting and sealing one end of a valve, and an upper sealing disc (3) for pressing and sealing the other end of the valve in conjunction with the lower sealing disc (11); a buffer bracket (2) for auxiliary support of the valve is vertically and slidably installed on the lower sealing disc (11); The device further comprises a clamping mechanism (4) for laterally clamping and positioning the valve and for compressing and sealing the valve between the upper sealing disc (3) and the lower sealing disc (11); the clamping mechanism (4) comprises a lifting platform (42) located below the buffer bracket (2); a plurality of clamping members (43) are horizontally slidably mounted on the lifting platform (42); and a driving assembly (44) for driving the plurality of clamping members (43) to synchronously clamp and position the valve. During the inspection, when the lifting platform (42) is at the highest position, the valve is placed on the slow bracket (2), and the bottom end of the slow bracket (2) is supported on the upper end surface of the lifting platform (42); After the driving assembly (44) drives the plurality of clamping members (43) to perform side clamping and positioning on the valve, the slow bracket (2) drives the valve to descend synchronously with the lifting platform (42); When the lifting platform (42) is lowered to the lowest position, it is separated from the slow bracket (2), the slow bracket (2) is overlapped on the lower sealing plate (11), and the upper end surfaces of the slow bracket (2) and the lower sealing plate (11) are flush, and the valve is pressed and sealed between the upper sealing plate (3) and the lower sealing plate (11).

2. The high-precision marine valve air tightness automatic detection device according to claim 1, characterized in that: The upper end surface of the lower sealing plate (11) is provided with a plurality of avoidance grooves (111) distributed around its circumference, and each avoidance groove (111) is provided with a vertical guide groove (112); the buffer bracket (2) comprises a base ring (21) located between the lower sealing plate (11) and the lifting platform (42), and the upper end surface of the base ring (21) is fixed with a plurality of sliders (22) which are slidably mounted in the plurality of guide grooves (112) in a one-to-one correspondence, and a support block (23) for supporting one end of the valve is horizontally fixed to the top of each slider (22), and the avoidance groove (111) is arranged in cooperation with the support block (23) in a relative position, and when the support block (23) is overlapped in the avoidance groove (111), the upper end surface of the support block (23) is flush with the upper end surface of the lower sealing plate (11).

3. The high-precision automatic air tightness detection equipment for marine valves according to claim 1 is characterized by: The sealing contact end surfaces between the lower sealing disc (11) and the upper sealing disc (3) and the valve are both provided with sealing grooves that fit in and are embedded with the sealing layer in the valve.

4. The high-precision automatic air tightness detection device for marine valves according to claim 2, characterized in that: The supporting platform (1) further comprises a column (12) fixed to the bottom end of the lower sealing plate (11); the column (12) vertically passes through the base ring (21) and the lifting platform (42), and the lifting platform (42) is vertically slidably mounted on the column (12).

5. A marine high-precision valve air tightness automatic detection device according to claim 1 or 4, characterized in that: The clamping member (43) comprises a slide plate (431) mounted horizontally and slidably on the bottom end surface of the lifting platform (42); a clamping block seat (432) is fixed on the slide plate (431); a side clamping block (433) for clamping the valve laterally is fixed on the clamping block seat (432); and a pressure block (434) is fixed on the top end of the side clamping block (433) for pressing downwardly against the upper end surface of the upper sealing plate (3).

6. The high-precision automatic air tightness detection equipment for marine valves according to claim 5, characterized in that: The driving assembly (44) includes a hinged seat (442) that is driven to lift and slide and is mounted on the column (12). A plurality of connecting rods (443) corresponding to a plurality of clamping members (43) are hinged on the hinged seat (442). The other end of the connecting rod (443) is hinged on a slide plate (431) at a corresponding position.

7. The high-precision automatic air tightness detection equipment for marine valves according to claim 5, characterized in that: The side clamping block (433) is cylindrical, and a screw (4331) threadedly connected to the clamping block seat (432) is fixed to the bottom end of the side clamping block (433).

8. The high-precision automatic air tightness detection equipment for marine valves according to claim 1, characterized in that: The end surfaces of the lower sealing disc (11) and the upper sealing disc (3) that are in sealing contact with the valve are both provided with raised portions that protrude relative to the end surfaces and can extend inwardly to press against the side wall of the inner cavity of the valve port.

9. The high-precision automatic air tightness detection equipment for marine valves according to claim 1, characterized in that: The end surface of the upper sealing disc (3) that is in sealing contact with the valve is provided with a positioning portion that cooperates with the valve for positioning.

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