Sealing performance detection device for valve casting

Abstract

The utility model provides a sealing performance detection device for valve casting, and belongs to the technical field of valve detection. The sealing performance detection device for valve casting comprises a detection structure and a pressing structure, the detection structure comprises a working table, a water tank, supporting plates, a driving assembly, two rotating blocks, a clamping assembly and a clamping plate, the water tank is arranged in the working table, the two supporting plates are arranged on one side of the working table in parallel, and the clamping assembly is arranged on the other side of the working table. The driving assembly is arranged in the supporting plate, the two rotating blocks are both fixedly connected with the driving assembly, the clamping assembly is connected with the two rotating blocks, and the clamping plate is fixedly connected with the clamping assembly. According to the sealing performance detection device for valve casting, feeding and discharging are convenient and rapid, different workpieces can be conveniently and continuously detected, the detection efficiency is improved, meanwhile, the problem of sealing failure caused by outer edge tilting of a traditional plane pressing plate is solved, and the sealing effect is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of valve detection, in particular to a sealing property detection device for valve casting. BACKGROUND

[0002] The valve is a pipeline accessory used for opening and closing the pipeline, controlling the flow direction, adjusting and controlling the parameters (temperature, pressure and flow) of the conveying medium. According to the function, the valve can be divided into shut-off valve, check valve, regulating valve and the like. The valve is a control component in a fluid conveying system, which has the functions of stopping, adjusting, guiding flow, preventing backflow, stabilizing pressure, dividing flow or overflow pressure relief and the like. The valve is an indispensable mechanism part in the industrial production chain, and the sealing property and use strength are the most important for the valve use quality. Therefore, during production, a detection device is usually used to detect the sealing property of the valve. However, in the use process of the existing detection device, in order to facilitate the observation of the air leakage condition, the valve is usually fixed in the box, then water is injected into the box to immerse the valve in water, then air is injected into the valve, and whether bubbles are generated is observed to detect the sealing property of the valve. This detection method needs to frequently inject and drain water in the box, which is time-consuming and low in detection efficiency.

[0003] To this end, the Chinese patent application No. CN202420355868.2 discloses a sealing property detection device for valve production. The valve to be detected is placed between two sealing pressure discs, a servo motor is started to clamp and fix the valve, then a double-shaft servo motor is started to drive the valve to move downward to immerse the valve in the water in the water tank, then two air pumps are started to input air into the valve, and the sealing property of the valve is detected by observing whether bubbles are generated in the water tank. After the detection is completed, the double-shaft servo motor is started to rotate reversely to drive the valve to move upward, so that the valve is put into or taken out of the water by using the lifting mechanism, without frequent injection and drainage of water in the box, thereby simplifying the operation process and improving the detection efficiency.

[0004] In the use process of the above scheme, the following problems still exist. In use, the two sealing pressure discs are used to clamp and fix the flange plates on both sides of the valve. However, in the clamping process, the outer ring of the sealing pressure disc is easy to be lifted up, and a gap is generated between the sealing pressure disc and the flange plate, thereby affecting the sealing property of clamping and the detection effect. Practical new type content

[0005] In order to make up for the above shortcomings, the application provides a sealing detection device for valve casting, aiming to improve the problem that in use, the flange plates on both sides of the valve are clamped and fixed by two sealing pressure plates, but in the clamping process, the outer ring of the sealing pressure plate is easy to be raised and a gap is generated with the flange plate, thereby affecting the sealing performance of clamping and the detection effect.

[0006] The application embodiment provides a sealing detection device for valve casting, which comprises a detection structure and a pressing structure. The detection structure comprises a workbench, a water tank, a support plate, a driving assembly, two rotating blocks, a clamping assembly and a clamping plate. The water tank is arranged in the workbench. Two support plates are arranged in parallel on one side of the workbench. The driving assembly is arranged in the support plate. The two rotating blocks are fixedly connected with the driving assembly. The clamping assembly is connected with the two rotating blocks. The clamping plate is fixedly connected with the clamping assembly. The pressing structure comprises a positioning sleeve, a pressing assembly, two L-shaped connecting plates and an arc-shaped pressing plate. The positioning sleeve is fixedly connected with one side of the clamping plate. The pressing assembly is connected with the clamping plate. The two L-shaped connecting plates are rotatably connected with the pressing assembly. The arc-shaped pressing plate is fixedly connected with the L-shaped connecting plate.

[0007] In a specific embodiment, the driving assembly comprises an electric push rod, a limiting block, a first servo motor, a first rotating shaft and a second rotating shaft. The electric push rod is installed in the support plate. The limiting block is movably connected with the movable end of the electric push rod. The limiting block is slidably connected with the support plate. The first servo motor is installed on one side of the limiting block. The first rotating shaft is connected with the output end of the first servo motor. The first rotating shaft and the second rotating shaft are rotatably connected with two limiting blocks respectively. The two rotating blocks are fixedly connected with one end of the first rotating shaft and the second rotating shaft respectively.

[0008] In the above implementation process, the electric push rod, the limiting block, the first servo motor, the first rotating shaft and the second rotating shaft are arranged, which can conveniently drive the valve to rise and conveniently drive the two groups of clamping assemblies to rotate.

[0009] In a specific implementation, the clamping assembly includes two fixed frames, a second servo motor, two bidirectional screws, two screw nut pairs, a first bevel gear, a third rotating shaft and a second bevel gear. The two fixed frames are oppositely arranged on one side of the rotating block. The second servo motor is mounted on one side of the fixed frame. The bidirectional screw is connected with the output end of the second servo motor. The bidirectional screw is rotatably connected in the fixed frame. The screw nut pair is threadedly connected with the bidirectional screw. The screw nut pair is slidably connected with the fixed frame. The first bevel gear is fixedly connected with one end of the bidirectional screw. The third rotating shaft is rotatably connected with the rotating block. The second bevel gear is fixedly connected with both ends of the third rotating shaft. The second bevel gear is engaged with the first bevel gear. The clamping plate is fixedly connected with the screw nut pair.

[0010] In the above implementation process, the two fixed frames, the second servo motor, the two bidirectional screws, the two screw nut pairs, the first bevel gear, the third rotating shaft and the second bevel gear are arranged to conveniently drive the clamping plate to clamp and fix the valve. The two bidirectional screws have opposite screw threads, so that when one undetected valve is clamped, the other detected valve is conveniently released from clamping, facilitating rapid feeding and discharging, continuous detection of different workpieces and improvement of detection efficiency.

[0011] In a specific implementation, the pressing assembly includes an adjusting plate, a screw rod and a sliding rod. The screw rod is threadedly connected with the adjusting plate. The screw rod is rotatably connected with the clamping plate. The sliding rod is fixedly connected with one side of the clamping plate. The adjusting plate is slidably connected with the sliding rod. Two L-shaped connecting plates are rotatably connected with two sides of the adjusting plate, respectively.

[0012] In the above implementation process, the adjusting plate, the screw rod and the sliding rod are arranged to conveniently drive the two L-shaped connecting plates and the arc-shaped pressing plate to move, so that the arc-shaped pressing plate presses the flange plate of the valve, improving the clamping sealing performance.

[0013] In a specific implementation, a bearing is embedded in one side of the clamping plate. One end of the screw rod is interference-fitted with the inner ring of the bearing.

[0014] In the above implementation process, one end of the screw rod is interference-fitted with the inner ring of the bearing, so as to conveniently rotatably connect the screw rod with the clamping plate and reduce wear.

[0015] In a specific implementation, a T-shaped sliding block is arranged on one side of the L-shaped connecting plate. Sliding grooves are formed in both sides of the clamping plate. The T-shaped sliding block is slidably connected with the sliding grooves.

[0016] In the above implementation process, the T-shaped sliding block is slidably connected with the sliding grooves, so as to conveniently limit the movement of the L-shaped connecting plate.

[0017] In a specific embodiment, one side of the clamping plate is provided with a gas conveying assembly, the gas conveying assembly comprises a gas pump, a hose and a connecting pipe, the gas pump is fixedly installed on one side of each of the two fixing frames, the hose is in communication with the gas pump and the connecting pipe at two ends respectively, the connecting pipe is arranged in the clamping plate, and the connecting pipe is in communication with the positioning sleeve.

[0018] In the above implementation process, through the arrangement of the gas pump, the hose and the connecting pipe, the detection gas can be directly injected into the valve inner cavity, and detection is facilitated.

[0019] Compared with the prior art, the beneficial effects of the present application are: through the arrangement of the driving assembly, the two rotating blocks, the clamping assembly and the clamping plate, when one valve is clamped, the other valve is unclamped, which facilitates rapid feeding and discharging, facilitates continuous detection of different workpieces, improves the detection efficiency, and through the movement of the two L-shaped connecting plates and the arc-shaped pressing plate driven by the pressing assembly, the arc-shaped pressing plate is tightly attached to one side of the valve flange, avoiding the sealing failure problem caused by the outward tilting of the traditional flat pressing plate, and improving the sealing effect. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0021] Figure 1 is a sealing detection device structure schematic diagram for valve casting provided by the embodiment of the present application;

[0022] Figure 2 is a detection structure schematic diagram provided by the embodiment of the present application;

[0023] Figure 3 is a pressing structure schematic diagram provided by the embodiment of the present application;

[0024] Figure 4 is a connection relationship cross-sectional structure schematic diagram between the pressing structure and the gas conveying assembly provided by the embodiment of the present application.

[0025] In the diagram: 10-Detection structure; 110-Workbench; 120-Water tank; 130-Support plate; 140-Drive assembly; 141-Electric push rod; 142-Limit block; 143-First servo motor; 144-First rotating shaft; 145-Second rotating shaft; 150-Rotating block; 160-Clamping assembly; 161-Fixing frame; 162-Second servo motor; 163-Bidirectional lead screw; 164-Lead screw and nut pair ; 165-First bevel gear; 166-Third rotating shaft; 167-Second bevel gear; 170-Clamping plate; 180-Air supply assembly; 181-Air pump; 182-Hose; 183-Connecting pipe; 20-Pressure structure; 210-Positioning sleeve; 220-Pressure assembly; 221-Adjusting plate; 222-Screw; 223-Slide rod; 230-L-shaped connecting plate; 240-Arc-shaped pressure plate; 250-T-shaped slider. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0027] Please see Figure 1 This application provides a valve casting sealing performance testing device, including a testing structure 10 and a clamping structure 20.

[0028] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 The detection structure 10 includes a workbench 110, a water tank 120, a support plate 130, a drive assembly 140, two rotating blocks 150, a clamping assembly 160, and a clamping plate 170. The water tank 120 is disposed inside the workbench 110. Two support plates 130 are arranged parallel to each other on one side of the workbench 110. The drive assembly 140 is disposed inside the support plate 130. Both rotating blocks 150 are fixedly connected to the drive assembly 140. The clamping assembly 160 is connected to the two rotating blocks 150. The clamping plate 170 is fixedly connected to the clamping assembly 160.

[0029] In the specific setting, the driving assembly 140 includes an electric push rod 141, a limiting block 142, a first servo motor 143, a first rotating shaft 144 and a second rotating shaft 145, the electric push rod 141 is installed in the support plate 130, the limiting block 142 is connected with the movable end of the electric push rod 141, the limiting block 142 is slidingly connected with the support plate 130, the first servo motor 143 is installed on one side of the limiting block 142, the first rotating shaft 144 is connected with the output end of the first servo motor 143, the first rotating shaft 144 and the second rotating shaft 145 are respectively rotationally connected with the two limiting blocks 142, and two rotating blocks 150 are respectively fixedly connected with one end of the first rotating shaft 144 and the second rotating shaft 145, wherein, through the setting of the electric push rod 141, the limiting block 142, the first servo motor 143, the first rotating shaft 144 and the second rotating shaft 145, the valve can be conveniently driven to lift, and two groups of clamping assemblies 160 can be conveniently driven to rotate.

[0030] In the specific setting, the clamping assembly 160 includes two fixed frames 161, a second servo motor 162, two bidirectional lead screws 163, two screw nut pairs 164, a first bevel gear 165, a third rotating shaft 166 and a second bevel gear 167, the two fixed frames 161 are oppositely arranged on one side of the two rotating blocks 150, the second servo motor 162 is installed on one side of the fixed frame 161, the bidirectional lead screw 163 is connected with the output end of the second servo motor 162, the two fixed frames 161 are rotationally connected with the bidirectional lead screw 163, the two screw nut pairs 164 are threadedly connected with the bidirectional lead screw 163, the screw nut pair 164 is slidingly connected with the fixed frame 161, one end of each of the two bidirectional lead screws 163 is fixedly connected with the first bevel gear 165, the third rotating shaft 166 is rotationally connected with the rotating block 150, the third rotating shaft 166 is fixedly connected with the second bevel gear 167 at both ends, the second bevel gear 167 is meshed with the first bevel gear 165, and the clamping plate 170 is fixedly connected with the screw nut pair 164, wherein, through the setting of the two fixed frames 161, the second servo motor 162, the two bidirectional lead screws 163, the two screw nut pairs 164, the first bevel gear 165, the third rotating shaft 166 and the second bevel gear 167, the clamping plate 170 can conveniently clamp and fix the valve, the screw thread directions of the two bidirectional lead screws 163 are opposite, the valve that has been detected can be conveniently released from clamping when clamping a valve that has not been detected, the detection efficiency is improved.

[0031] When being specifically arranged, the one side of the clamping plate 170 is provided with the gas conveying assembly 180, the gas conveying assembly 180 comprises the air pump 181, the hose 182 and the connecting pipe 183, the air pump 181 is fixedly installed on the one side of each of the two fixing frames 161, the two ends of the hose 182 are in communication with the air pump 181 and the connecting pipe 183 respectively, the connecting pipe 183 is arranged in the clamping plate 170, and the connecting pipe 183 is in communication with the positioning sleeve 210, wherein, through the arrangement of the air pump 181, the hose 182 and the connecting pipe 183, the detection gas can be directly injected into the inner cavity of the valve, and the detection is facilitated.

[0032] Please refer to Figure 1 、 Figure 3 and Figure 4 , the pressing structure 20 comprises the positioning sleeve 210, the pressing assembly 220, the two L-shaped connecting plates 230 and the arc-shaped pressing plate 240, the positioning sleeve 210 is fixedly connected to the one side of the clamping plate 170, the pressing assembly 220 is connected with the clamping plate 170, the two L-shaped connecting plates 230 are rotationally connected with the pressing assembly 220, the arc-shaped pressing plate 240 is fixedly connected with the L-shaped connecting plate 230, and the positioning sleeve 210 is provided with a sealing gasket.

[0033] When being specifically arranged, the pressing assembly 220 comprises the adjusting plate 221, the screw rod 222 and the sliding rod 223, the screw rod 222 is threadedly connected with the adjusting plate 221, the screw rod 222 is rotationally connected with the clamping plate 170, the sliding rod 223 is fixedly connected to the one side of the clamping plate 170, the adjusting plate 221 is slidingly connected with the sliding rod 223, and the two L-shaped connecting plates 230 are rotationally connected with the two sides of the adjusting plate 221, wherein, through the arrangement of the adjusting plate 221, the screw rod 222 and the sliding rod 223, the two L-shaped connecting plates 230 and the arc-shaped pressing plate 240 can be driven to move, so that the arc-shaped pressing plate 240 can press the flange plate of the valve, and the clamping sealing performance is improved.

[0034] When being specifically arranged, the one side of the clamping plate 170 is embedded with a bearing, and one end of the screw rod 222 is in interference fit with the inner ring of the bearing, wherein, through the interference fit between the one end of the screw rod 222 and the inner ring of the bearing, the rotational connection between the screw rod 222 and the clamping plate 170 is facilitated, and the abrasion is reduced.

[0035] When being specifically arranged, the one side of the L-shaped connecting plate 230 is provided with the T-shaped sliding block 250, the two sides of the clamping plate 170 are provided with the sliding grooves, and the T-shaped sliding block 250 is slidingly connected with the sliding grooves, wherein, through the sliding connection between the T-shaped sliding block 250 and the sliding grooves, the movement of the L-shaped connecting plate 230 can be conveniently limited.

[0036] The working principle of the sealing detection device for valve casting is as follows: when the sealing detection device for valve casting is used, the first servo motor 143 drives the first rotating shaft 144 and the second rotating shaft 145 to rotate synchronously, drives the two sets of clamping assemblies 160 to rotate to the upper side of the water tank 120, and places the undetected valve between the two positioning sleeves 210. The second servo motor 162 drives the bidirectional screw rod 163 to rotate, so that the two screw nut pairs 164 drive the clamping plates 170 to clamp the valve flange plate, and the meshing transmission of the first bevel gear 165 and the second bevel gear 167 drives the clamping assembly 160 of the other station to automatically release the detected valve due to the reverse thread action of the bidirectional screw rod 163. The operator can simultaneously complete the unloading of the detected valve and the loading of the valve to be detected, which facilitates quick loading and unloading, facilitates continuous detection of different workpieces, improves the detection efficiency, and then rotates the two L-shaped connecting plates 230, so that one side of the arc-shaped pressing plate 240 corresponds to the valve flange plate, rotates the screw rod 222, drives the adjusting plate 221 to move along the slide rod 223, and makes the T-shaped sliding block 250 slide into the sliding groove, so that the arc-shaped pressing plate 240 tightly fits one side of the valve flange plate, avoids the sealing failure problem caused by the upward bending of the outer edge of the traditional flat pressing plate, improves the sealing effect, and opens the electric push rod 141 to drive the limiting block 142 to slide in the supporting plate 130, so that the valve to be detected is immersed in the water tank 120. The gas pump 181 injects detection gas into the valve cavity through the hose 182 and the connecting pipe 183, and performs valve sealing gas tightness test.

[0037] It should be noted that the specific model specifications of the electric push rod 141, the first servo motor 143, the second servo motor 162 and the gas pump 181 need to be determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the art, so it will not be described in detail.

[0038] The power supply and principle of the electric push rod 141, the first servo motor 143, the second servo motor 162 and the gas pump 181 are clear to those skilled in the art, and will not be described in detail here.

[0039] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A sealing performance testing device for valve casting, characterized in that, Comprising The detection structure (10) includes a workbench (110), a water tank (120), a support plate (130), a drive assembly (140), two rotating blocks (150), a clamping assembly (160) and a clamping plate (170), the water tank (120) is arranged in the workbench (110), two support plates (130) are arranged in parallel on one side of the workbench (110), the drive assembly (140) is arranged in the support plate (130), two rotating blocks (150) are fixedly connected with the drive assembly (140), the clamping assembly (160) is connected with the two rotating blocks (150), and the clamping plate (170) is fixedly connected with the clamping assembly (160); The compression structure (20) includes a positioning sleeve (210), a compression assembly (220), two L-shaped connecting plates (230) and an arc-shaped pressing plate (240), the positioning sleeve (210) is fixedly connected on one side of the clamping plate (170), the compression assembly (220) is connected with the clamping plate (170), two L-shaped connecting plates (230) are rotatably connected with the compression assembly (220), and the arc-shaped pressing plate (240) is fixedly connected with the L-shaped connecting plate (230).

2. The apparatus for detecting the sealing property of a valve for casting according to claim 1, wherein The drive assembly (140) includes an electric push rod (141), a limiting block (142), a first servo motor (143), a first rotating shaft (144) and a second rotating shaft (145), the electric push rod (141) is installed in the support plate (130), the limiting block (142) is connected with the movable end of the electric push rod (141), the limiting block (142) is slidably connected with the support plate (130), the first servo motor (143) is installed on one side of the limiting block (142), the first rotating shaft (144) is connected with the output end of the first servo motor (143), and the first rotating shaft (144) and the second rotating shaft (145) are rotatably connected with two limiting blocks (142), respectively. Two rotating blocks (150) are fixedly connected with one end of the first rotating shaft (144) and the second rotating shaft (145), respectively.

3. The apparatus for detecting the leak of a valve for casting according to claim 1, wherein The clamping assembly (160) comprises two fixed frames (161), a second servo motor (162), two bidirectional lead screws (163), two lead screw nut pairs (164), a first bevel gear (165), a third rotating shaft (166) and a second bevel gear (167), the two fixed frames (161) are oppositely arranged on one side of the rotating block (150), the second servo motor (162) is installed on one side of the fixed frame (161), the bidirectional lead screw (163) is connected with the output end of the second servo motor (162), the bidirectional lead screw (163) is rotatably connected in the two fixed frames (161), the two lead screw nut pairs (164) are in threaded connection with the bidirectional lead screw (163), the lead screw nut pair (164) is in sliding connection with the fixed frame (161), one end of the bidirectional lead screw (163) is fixedly connected with the first bevel gear (165), the third rotating shaft (166) is rotatably connected with the rotating block (150), the third rotating shaft (166) is fixedly connected with the second bevel gear (167) at both ends, the second bevel gear (167) is in meshing connection with the first bevel gear (165), and the clamping plate (170) is fixedly connected with the lead screw nut pair (164).

4. The apparatus for detecting the sealing property of a valve casting according to claim 1, wherein The pressing assembly (220) comprises an adjusting plate (221), a screw rod (222) and a sliding rod (223), the screw rod (222) is in threaded connection with the adjusting plate (221), the screw rod (222) is rotatably connected with the clamping plate (170), the sliding rod (223) is fixedly connected on one side of the clamping plate (170), the adjusting plate (221) is in sliding connection with the sliding rod (223), and the two L-shaped connecting plates (230) are rotatably connected with two sides of the adjusting plate (221) respectively.

5. The apparatus according to claim 4, wherein A bearing is embedded on one side of the clamping plate (170), and one end of the screw rod (222) is in interference fit with the inner ring of the bearing.

6. The apparatus for detecting the leak of a valve casting according to claim 1, wherein A T-shaped sliding block (250) is arranged on one side of the L-shaped connecting plate (230), sliding grooves are formed in both sides of the clamping plate (170), and the T-shaped sliding block (250) is in sliding connection with the sliding grooves.

7. The apparatus for detecting the leak of a valve for casting according to claim 3, wherein A gas conveying assembly (180) is arranged on one side of the clamping plate (170), the gas conveying assembly (180) comprises an air pump (181), a hose (182) and a connecting pipe (183), the air pump (181) is fixedly installed on one side of the fixed frame (161), the hose (182) is in communication with the air pump (181) and the connecting pipe (183) respectively, the connecting pipe (183) is arranged in the clamping plate (170), and the connecting pipe (183) is in communication with the positioning sleeve (210).

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