An air tightness detection device and detection method suitable for straight-through stop valve

Abstract

The present application relates to an airtightness detection device and method for a straight-through stop valve, and relates to the technical field of valve detection. The device comprises a detection frame, an intelligent sensor fixed to the detection frame, a processing mechanism for sealing, detecting, marking, and painting the stop valve body, and a conveying member for conveying multiple stop valve bodies. The processing mechanism comprises a sealing assembly, a detection assembly, a marking assembly, and a painting assembly. The sealing assembly comprises two sealing covers movably disposed on the stop valve body, a first pressure sensor, an air pressure sensor, and a forward funnel respectively fixed to the two sealing covers, a synchronizing member for synchronously adjusting the two sealing covers, and a sealing member for sealing the forward funnel with the inner wall of the stop valve body. The present application can perform bidirectional air blowing detection on the stop valve body, can accurately detect the stop valve body, and avoid detection interference caused by foreign matter obstructing the flow of gas when blowing air in one direction of the stop valve.

Description

Technical Field

[0001] The present application relates to the technical field of valve detection, and in particular to an air tightness detection device and a detection method suitable for a straight-through stop valve. Background Art

[0002] The straight-through stop valve is a device used to prevent the flow of media. It relies on the pressure of the valve stem to tightly combine the sealing surface of the valve disc and the sealing surface of the valve seat to prevent the flow of media. During the opening and closing process, the friction between the sealing surfaces is small, it is wear-resistant, has a small opening height, and has good manufacturing process performance.

[0003] During the production and processing of straight-through stop valves, a detection device is usually required to detect the air tightness of the stop valve to detect whether the quality of the stop valve is qualified. For example, the Chinese patent with publication number CN112577732A in the relevant technology proposes an online detection device and an online detection method for a safety valve. The device has a detection port at the bottom end of the valve seat, which can be connected to external media input pipes, air compressors, booster water pumps and other components without disassembling the working pipeline. By inserting a sealing joint at the output port, the air outlet pipe, water outlet pipe and other components can be connected, thereby achieving the advantage of high-efficiency online detection function.

[0004] Regarding the above-mentioned related technologies, the inventors believe that there are the following defects: the current method for detecting the air tightness of the stop valve is usually to blow air into one port of the valve and then observe whether air is released from the other port. Although this detection method is simple, it cannot accurately detect the stop valve because there may be foreign matter such as particles and impurities inside the stop valve. These foreign matter may be stuck between the sealing surfaces of the stop valve, resulting in a loose seal. When blowing air from a certain direction of the stop valve, the foreign matter may hinder the flow of gas and cause detection interference, but when blowing air from another direction, the foreign matter may be blown away, causing gas leakage. Therefore, the accuracy of the stop valve air tightness detection cannot be guaranteed by the one-way blowing method of the stop valve. Summary of the Invention

[0005] In order to solve the problem that the current method for detecting the air tightness of a stop valve is usually to blow air into one port of the valve and then observe whether air is released from the other port, although this detection method is simple, it cannot accurately detect the stop valve, the present application provides an air tightness detection device and detection method suitable for a straight-through stop valve.

[0006] The present application provides an air tightness detection device and method for a straight-through stop valve, which adopts the following technical solutions:

[0007] An air tightness detection device for straight-through stop valves, comprising a detection frame, an intelligent sensor fixed to the detection frame, a processing mechanism for sealing, detecting, marking, and painting the stop valve body, and a conveying member for conveying multiple stop valve bodies, wherein the processing mechanism includes a sealing component, a detection component, a marking component, and a painting component;

[0008] The sealing assembly includes two sealing covers movably arranged on the stop valve body, a first pressure sensor, an air pressure sensor and a forward funnel respectively fixed to the two sealing covers, a synchronizing member for synchronously adjusting the two sealing covers, and a sealing member for sealing the forward funnel and the inner wall of the stop valve body;

[0009] The marking assembly includes two marking blocks rotatably arranged on the detection frame, an adjusting member for rotating the marking blocks, and a driving member for indirectly driving the adjusting member;

[0010] The detection assembly includes an air storage box fixed to the detection frame, two telescopic hoses fixed to the air storage box, a switching member for switching the two telescopic hoses open and closed, and a connecting member for switching and adjusting the two marking blocks. The connecting members are synchronously driven by the switching member. The air storage box is used to store aminosilane gas.

[0011] The painting assembly includes a paint filling box and a paint storage box fixed to the detection frame, annular tubes respectively fixed to two sealing covers, a plurality of paint spray heads respectively fixed to the two annular tubes, a paint filling member for filling the plurality of paint spray heads with paint, and a paint filling member for regularly filling the paint filling box with paint, the paint filling member being synchronously driven by a synchronizing member, and the paint storage box being used to store yellow acrylic resin paint;

[0012] The switching component includes a windshield movably provided on the two telescopic hoses, a movable rack fixed on the two windshields, a movable gear rotatably provided on the air storage box, and a servo motor fixed on the air storage box. The two movable racks are movably engaged with the movable gears, and the movable gears are connected to the output end of the servo motor. The two telescopic hoses are respectively connected to the two sealing covers, and the two telescopic hoses are connected to the air storage box. An air pump is provided on the air storage box, and the two air pressure sensors are respectively connected to the two sealing covers.

[0013] By adopting the above technical solution, the intelligent sensor can control the timing of opening and closing of the entire detection system. The processing mechanism can seal the top and bottom ends of the stop valve body, detect the air outlet at both ends of the stop valve body, mark the stop valve body with poor air tightness, and paint the upper and lower parts of the outer side of the stop valve body. At the same time, the upper and lower parts of the outer side of the stop valve body can be detected for cracks and sand holes. The conveying member can transport multiple stop valve bodies so that the processing mechanism can seal, detect, mark and paint the multiple stop valve bodies in turn.

[0014] In order to ensure the air tightness of the stop valve, in addition to testing the sealing of the inside of the stop valve, the appearance of the stop valve must also be tested to detect whether there are cracks and sand holes on the stop valve. However, the current method of stop valve appearance inspection is usually carried out by manual naked eye scanning. Although this inspection method is fast, it cannot guarantee the accuracy of the detection of cracks and sand holes on the outside of the stop valve, because the diameter of the sand hole is very small and it is difficult to find it by naked eye scanning alone. Moreover, if there are cracks and sand holes on the stop valve, it will also affect the detection effect when the stop valve is tested for internal one-way air blowing, and the accuracy of the stop valve sealing inspection cannot be guaranteed. At the same time, during the production and processing of the stop valve, it is usually necessary to spray yellow acrylic resin paint on the outside of the stop valve to ensure the aesthetics of the outside of the stop valve and make the stop valve wear-resistant and anti-corrosion.

[0015] The sealing component can be used to seal the top and bottom of the stop valve body when conducting an air tightness test, thereby ensuring the effectiveness of the air tightness test of the stop valve body. The detection component can be used to blow air on the top and bottom of the stop valve body respectively, thereby achieving two-way air blowing test of the stop valve body and ensuring the accuracy of the air tightness test inside the stop valve body. The marking component can be used to mark the stop valve body that fails the air tightness test, so that the staff can quickly screen the stop valve body. The painting component can be used to paint the top and bottom of the outside of the stop valve body. At the same time, the detection component can be used to blow air on the top and bottom of the inside of the stop valve body to quickly detect cracks and sand holes on the outside of the stop valve body.

[0016] The switching part can switch to blow air on the upper and lower inner sides of the stop valve body. The servo motor can drive the movable gear to rotate, and then drive the two movable racks and the two wind shields to move back or relative to each other. The two telescopic hoses can be opened and closed. When it is necessary to blow air on the top of the stop valve body, the upper telescopic hose can be in the open state and the lower telescopic hose can be in the closed state. When it is necessary to blow air on the bottom of the stop valve body, the lower telescopic hose can be in the open state and the upper telescopic hose can be in the closed state, so as to ensure the effect of two-way air blowing detection of the stop valve body. The vacuum pump can draw the gas in the air storage tank into the telescopic hose. At the same time, when the stop valve body detection is completed, the gas in the stop valve body can be drawn into the air storage tank through the telescopic hose for recovery to avoid gas waste.

[0017] Optionally, the synchronization component includes a threaded push block and a sealing gasket respectively fixed on the two sealing covers, a bidirectional screw rotatably arranged on the detection frame, and a motor fixed on the detection frame, the bidirectional screw is connected to the output end of the motor, the two threaded push blocks are threadedly connected to the bidirectional screw, the two sealing gaskets are movably fitted with the top and bottom ends of the stop valve body, the two first pressure sensors are respectively connected to the two sealing gaskets, and the two first pressure sensors are electrically connected to the motor.

[0018] By adopting the above technical solution, the synchronization part can automatically seal and disassemble the stop valve body, and the motor can drive the bidirectional screw to rotate, thereby driving the two sealing covers, two sealing gaskets, two air pressure sensors and two first pressure sensors to move relative to or opposite to each other. When the two sealing gaskets move relative to each other, they will fit with the stop valve body, so that the top and bottom of the stop valve body can be sealed in cooperation with the two sealing covers to ensure the effect of the air tightness detection of the stop valve body. When the two sealing gaskets move opposite to each other, they will be separated and disassembled from the stop valve body.

[0019] Optionally, the connecting part includes a switching plate movably provided on the two sealing covers, a fixed outer cylinder fixed on the movable rack, a movable inner rod movably provided on the fixed outer cylinder, a telescopic spring fixed on the movable inner rod, and an arc-shaped clamping block fixed on the telescopic spring. Two arc-shaped clamping grooves are provided on the inner side of the fixed outer cylinder, and the two arc-shaped clamping grooves are movably engaged with the arc-shaped clamping block. The two switching plates are fixedly connected to the two movable inner rods respectively. The number of the switching plates, movable rack, fixed outer cylinder, movable inner rod, telescopic spring and arc-shaped clamping block is two.

[0020] By adopting the above technical solution, the connecting part can be driven synchronously by the switching part. When the two movable racks move relative to or away from each other, they will also drive the two fixed outer cylinders, the two movable inner rods and the two switching plates to move relative to or away from each other. When the two switching plates move away from each other, the upper movable block is fitted with the switching plate and is in a closed state, and the lower movable block is separated from the switching plate and is in an open state. When the two switching plates move relative to each other, the upper movable block is separated from the switching plate and is in an open state, and the lower movable block is fitted with the switching plate and is in a closed state. When the switching part blows air to the upper and lower parts of the shut-off valve body, the corresponding movable block can be opened. When blowing air to the upper part of the shut-off valve body, the lower movable block can be opened, and when blowing air to the lower part of the shut-off valve body, the upper movable block can be opened, and then air leakage can open the regulating part at the specified position.

[0021] Optionally, the adjusting member includes a movable block and an adjusting frame movably arranged on the two sealing covers, and an annular spring and a coil spring respectively fixed on the two sealing covers, the two annular springs are respectively fixedly connected to the two movable blocks, the two adjusting frames are respectively movably fitted with the two movable blocks, the two adjusting frames are respectively hinged to the two sealing covers, the two movable blocks are respectively movably fitted with the two switching plates, the two marking blocks are respectively fixedly connected to the two adjusting frames, the two marking blocks are both movably fitted with the stop valve body, and the two coil springs are respectively fixedly connected to the two adjusting frames.

[0022] By adopting the above technical solution, the corresponding adjusting member can be driven when there is an air leakage in the stop valve body. When there is an air leakage in the stop valve body, the corresponding driving member will push the corresponding movable block to move, and then push the adjusting frame and the marking block to swing, so that the marking block fits with the stop valve body and marks the stop valve body, so that subsequent staff can quickly judge the air tightness of the inside of the stop valve body. After stopping blowing air into the stop valve body, the movable block will lose thrust, and then the elastic force of the annular spring and the coil spring can bounce the movable block and the adjusting frame to the specified position. Therefore, when the marking block does not mark the stop valve body, it means that the sealing inside the stop valve body is qualified.

[0023] Optionally, the driving member includes a balance plate movably arranged on the two sealing covers, a reverse funnel fixed on the forward funnel, an air outlet pipe fixed on the forward funnel, an air inlet pipe fixed on the reverse funnel, and a pushing block fixed on the balance plate, the pushing block and the movable block are movably fitted together, the air outlet of the air outlet pipe is located at one end of the balance plate, the pushing block is located at the other end of the balance plate, the balance plate is hinged to the sealing cover, the reverse funnel is connected to the air inlet pipe, the forward funnel is connected to the air outlet pipe, and the number of the balance plate, forward funnel, reverse funnel, air inlet pipe, air outlet pipe and pushing block is two each.

[0024] When the air is exhausted, the air in the closed position will be exhausted, and the closed position will be used for the throttle body to prevent the leakage of the throttle body. When the air is exhausted, the air in the closed position will be exhausted, and the closed position will be used for the throttle body to prevent the leakage of the throttle body.

[0025] Optionally, the sealing component includes an airbag fixed on the forward funnel, a second pressure sensor fixed on the airbag, a connecting pipe fixed on the airbag, and a solenoid valve fixed on the connecting pipe, the second pressure sensor and the air pressure sensor are both electrically connected to the solenoid valve, the airbag is fixed on the outside of the forward funnel and the reverse funnel, the second pressure sensor and the airbag are both movably fitted with the inner wall of the shut-off valve body, the number of the forward funnel, reverse funnel, airbag, second pressure sensor and solenoid valve are two, the two airbags are both connected to the connecting pipe, and the air inlet of the connecting pipe is connected to the air storage tank.

[0026] By adopting the above technical solution, when the two sealing covers respectively move the two forward funnels and the two reverse funnels into the stop valve body, the seals can ensure the sealing of the two forward funnels and the two reverse funnels with the inner wall of the stop valve body. When the air storage tank blows air into the stop valve body, the connecting pipe can blow the gas in the air storage tank into the two air bags, which can expand the two air bags and make the two air bags fit tightly with the interior of the stop valve body, thereby preventing the two forward funnels from floating away from the gap between the two forward funnels and the interior of the stop valve body when collecting gas, so as to ensure the gas collection effect of the two forward funnels. The two second pressure sensors can detect the pressure generated by the two air bags and the inner wall of the stop valve body. When it is detected that the pressure of the two air bags reaches the limit, the solenoid valve closes the connecting pipe to prevent the two air bags from bursting due to excessive gas.

[0027] Optionally, the paint filling component includes an extrusion plate movably arranged on the inner side of the paint filling box, two paint filling hoses fixed on the paint filling box, a partition plate fixed on the inner side of the paint filling box, a movable frame fixed on the extrusion plate, a threaded rod rotatably arranged on the paint filling box, a first bevel gear and a second bevel gear, the movable frame is threadedly connected to the threaded rod, the threaded rod is fixedly connected to the second bevel gear, the first bevel gear is fixedly connected to the bidirectional screw, the number of the multiple paint spray heads is two groups, and the two groups of paint spray heads are arranged at equal distances on the two annular tubes.

[0028] By adopting the above technical solution, the synchronous part drive will also drive the paint filling part to drive synchronously. When the bidirectional screw rotates, it will also drive the first bevel gear, the second bevel gear and the threaded rod to rotate in turn, which will drive the movable frame and the extrusion plate to move in turn, and can squeeze the paint in the paint filling box, and squeeze the paint into the two paint filling hoses, two annular tubes and two sets of paint spray heads in turn. Then the two sets of paint spray heads will spray the paint on the upper and lower sides of the outside of the stop valve body respectively, which can ensure the effect of painting on both sides of the stop valve body.

[0029] Optionally, the paint filling part includes a connecting pipe fixed on the paint filling box, a painting plate movably arranged on the connecting pipe, two compression springs fixed on the connecting pipe, two connecting springs fixed on the extrusion plate, and a wedge block fixed on the connecting springs. The paint filling box and the paint storage box are both connected to the connecting pipe, the two compression springs are fixedly connected to the painting plate, and the painting plate is movably fitted with the wedge block.

[0030] By adopting the above technical solution, the paint filling part can add paint in a quantitative manner in the paint filling part. When the extrusion plate squeezes the paint in the paint filling box to the left, the wedge block will fit and squeeze the inner wall of the paint filling box, which can put the connecting spring in an extrusion state, so that the wedge block moves to the inner side of the extrusion plate, and the wedge block will separate from the painting plate. The elastic force of the compression spring can drive the painting plate to move to the right, and the connecting pipe can be sealed and closed, which can prevent the paint in the paint storage box from still flowing to the inner side of the paint filling box when the extrusion plate squeezes the paint in the paint filling box. When adding paint, when the extrusion plate moves to the left and corresponds to the connecting pipe, the wedge block will lose its limit. Through the elastic force of the connecting spring, the wedge block can be moved to the inside of the connecting pipe and fit with the painting plate. When the extrusion plate moves to the left, the compression spring is in a pulling state, which will also push the painting plate to the left to open the connecting pipe. The paint in the paint storage box will flow into the paint filling box through the connecting pipe, and paint can be added to the paint filling box. This method can be used to quantify the paint, and a specified amount of paint can be added to the inside of the paint filling box.

[0031] The second aspect of the present application provides an air tightness detection method applicable to a straight-through stop valve, which adopts the following technical solution:

[0032] The present application also discloses an air tightness detection method applicable to a straight-through stop valve. Based on the above-mentioned air tightness detection device applicable to a straight-through stop valve, the method includes the following steps:

[0033] S1. The transfer member can clamp and fix multiple stop valve bodies and simultaneously transfer multiple stop valve bodies that need to be tested. The multiple stop valve bodies that need to be tested are sequentially transferred between the two sealing covers to facilitate the sequential testing of multiple stop valve bodies.

[0034] S2. The synchronizer drives the two sealing gaskets to move relative to each other, sealing the top and bottom of the stop valve body. Simultaneously, the synchronizer indirectly drives the paint filling unit, which squeezes the yellow acrylic resin paint in the paint filling tank into two sets of paint spray heads, spraying the paint onto the upper and lower sides of the outside of the stop valve body. While the sealing cover seals the stop valve body, the outer end surface of the stop valve body can be painted in multiple areas. The paint filling unit indirectly drives the paint filling unit, which adds paint to the paint filling tank and quantifies the paint, adding a specified amount of paint to the inside of the paint filling tank.

[0035] S3. When it is necessary to detect whether there are cracks and sand holes on the upper part of the outer side of the stop valve body, the switching part and the connecting part are driven to draw aminosilane gas into the upper part of the inner part of the stop valve body. When it is necessary to detect whether there are cracks and sand holes on the lower part of the outer side of the stop valve body, the switching part and the connecting part are driven to draw gas into the lower part of the inner part of the stop valve body. Then, when there are cracks and sand holes on the outer side of the stop valve body, the gas inside the stop valve body will be blown away through the cracks and sand holes. Because there is yellow acrylic resin paint on the outer side of the stop valve body, the aminosilane gas in the stop valve body will react with the yellow acrylic resin paint when it is blown away from the cracks and sand holes, resulting in a color change. The color of the paint will turn yellow-green or orange-yellow, so that subsequent staff can quickly determine whether there are cracks and sand holes on the outer side of the stop valve body, and can quickly let the staff know the location of the cracks and sand holes on the stop valve body, so as to facilitate welding and repair of the stop valve body. If the color of the paint on the outer side of the stop valve body does not change, it means that there are no cracks and sand holes on the outer side of the stop valve body.

[0036] S4. When it is necessary to test the sealing performance of the interior of the stop valve body, first ensure the sealing performance of the two forward funnels and the two reverse funnels with the inner wall of the stop valve body by driving the sealing component. Then, gas is drawn into the upper part of the stop valve body through the switching component and the connecting component. The gas can be concentratedly blown into the upper air inlet pipe through the reverse funnel above the stop valve body, and then blown onto the sealing surface inside the stop valve body. When there is a leak on the sealing surface of the stop valve body, the gas will float to the bottom of the stop valve body through the gap in the sealing surface. The floating gas will be concentratedly blown into the lower air outlet pipe through the forward funnel below the stop valve body, and then the regulating component can be driven to swing the lower marking block, marking the stop valve body, thereby achieving the purpose of blowing test at one end of the stop valve body.

[0037] S5. When the sealing performance of the upper part of the stop valve body is qualified, the gas can be drawn into the lower part of the stop valve body through the switching parts and the connecting parts, and the gas can be concentratedly blown into the lower air inlet pipe through the reverse funnel at the lower part of the stop valve body, and then the lower air inlet pipe will blow the gas onto the sealing surface on the inner side of the stop valve body. When there is an air leak on the sealing surface of the stop valve body, the gas will float to the upper part of the stop valve body through the gap in the sealing surface, and the floating gas will be concentratedly blown into the upper air outlet pipe through the forward funnel above the stop valve body, and then the adjusting part can be driven to drive the upper marking block to swing, marking the stop valve body, so as to achieve the purpose of air blowing detection at the other end of the stop valve body, and then the two-way air blowing detection of the stop valve body can be completed. When the two air pressure sensors detect that the air pressure of the stop valve body has not changed for a period of time, it indicates that the sealing performance of the upper and lower parts of the stop valve body is qualified.

[0038] By adopting the above technical solution, the processing mechanism can perform two-way air blowing detection on the stop valve body, and can accurately detect the stop valve body. If there are foreign objects such as particles and impurities inside the stop valve body, it can avoid the foreign objects blowing in a certain direction of the stop valve hindering the flow of gas and causing detection interference, which can ensure the accuracy of the air tightness detection of the stop valve body. At the same time, while detecting the air tightness inside the stop valve body, the appearance of the stop valve body can also be detected to detect whether there are cracks and sand holes on the stop valve body, and there is no need to detect the sealing of the stop valve appearance by manual visual scanning.

[0039] In summary, this application includes at least one of the following beneficial technical effects:

[0040] 1. The conveying part can clamp and fix multiple stop valve bodies to prevent the stop valve bodies from shaking or falling off during detection. At the same time, it can convey multiple stop valve bodies that need to be detected, so that the multiple stop valve bodies that need to be detected can be conveyed between the two sealing covers in turn, so that the multiple stop valve bodies can be detected in turn, and the detected stop valve bodies can be conveyed away at the same time. The motor can drive the bidirectional screw to rotate clockwise, and then drive the two sealing covers and the two sealing gaskets to move relative to each other to seal the top and bottom of the stop valve body. When the bidirectional screw rotates, it will also drive the first bevel gear, the second bevel gear and the threaded rod to rotate in turn, and then drive the movable frame and the extrusion plate to move in turn to squeeze the paint in the paint filling box, and the paint can be squeezed into the two paint filling soft The paint is sprayed on the upper and lower sides of the outer side of the stop valve body respectively, which can ensure the paint spraying effect on both sides of the stop valve body. When the extrusion plate moves in the opposite direction to correspond to the connecting pipe, the wedge block will lose its limit. The elastic force of the connecting spring can move the wedge block to the inner side of the connecting pipe and fit the painting plate. When the extrusion plate moves in the opposite direction, the compression spring is in a pulling state, which will also push the painting plate to the left to open the connecting pipe, and then the paint in the paint storage box will flow into the paint filling box through the connecting pipe. Paint can be added to the paint filling box. This method can be used to quantify the paint. A specified amount of paint can be added to the inside of the paint filling box. In the process of the sealing cover sealing the stop valve body, the outer end face of the stop valve body can be painted in multiple ranges.

[0041] 2. When it is necessary to detect whether there are cracks and sand holes on the upper side of the stop valve body, the switching piece and the connecting piece drive the two wind shields and the two switching plates to move oppositely, so that the upper telescopic hose is in the open state, the lower telescopic hose is in the closed state, the upper movable block is in contact with the switching plate and is in the closed state, the lower movable block is separated from the switching plate and is in the open state, and the air pump can draw the gas in the gas storage tank into the upper part of the stop valve body through the upper telescopic hose. When it is necessary to detect whether there are cracks and sand holes on the lower side of the stop valve body, the switching piece and the connecting piece drive the two wind shields and the two switching plates to move relative to each other, so that the upper telescopic hose is in the closed state, the lower telescopic hose is in the open state, the upper movable block is separated from the switching plate and is in the open state, the lower movable block is in contact with the switching plate and is in the closed state, and the air pump can The gas in the gas storage tank is drawn into the lower part of the stop valve body through the telescopic hose below. When there are cracks and sand holes on the outside of the stop valve body, the gas inside the stop valve body will be blown away through the cracks and sand holes. Because there is yellow acrylic resin paint on the outside of the stop valve body, the aminosilane gas in the stop valve body will react with the yellow acrylic resin paint when it is blown away from the cracks and sand holes, resulting in a color change. The paint color will turn yellow-green or orange-yellow, so that subsequent staff can quickly determine whether there are cracks and sand holes on the outside of the stop valve body. At the same time, the staff can quickly know the location of the cracks and sand holes on the stop valve body, so as to facilitate welding and maintenance of the stop valve body. If the paint color on the outside of the stop valve body does not change, it means that there are no cracks and sand holes on the outside of the stop valve body, thereby achieving the purpose of detecting cracks and sand holes on the outside of the stop valve body.

[0042] 3. The gas in the gas storage tank can be blown into the two air bags through the connecting pipe, which can expand the two air bags and make the two air bags fit tightly with the inside of the stop valve body, ensuring the sealing between the two forward funnels and the inner wall of the stop valve body, and preventing the gas from drifting away from the gap between the two forward funnels and the inside of the stop valve body when the two forward funnels collect gas, so as to ensure the gas collection effect of the two forward funnels. The pressure generated by the two air bags and the inner wall of the stop valve body can be detected by the two second pressure sensors. When the two second pressure sensors detect that the pressure of the two air bags reaches the limit, it means that the two air bags and the inner wall of the stop valve body are completely in a sealed state. Then, the two second pressure sensors will transmit signals to the solenoid valve, causing the solenoid valve to close the connecting pipe, stop the connecting pipe from supplying gas to the two air bags, and avoid the two air bags from bursting due to excessive gas.

[0043] 4. When the sealing performance of the interior of the stop valve body needs to be tested, the above principle is used to open the upper telescopic hose and close the lower telescopic hose. The air pump can draw the gas in the air storage tank into the upper part of the stop valve body through the upper telescopic hose. When the gas flows on the upper inside of the stop valve body, the gas can be concentratedly blown into the upper air inlet pipe through the reverse funnel on the upper part of the stop valve body and blown onto the sealing surface on the inner side of the stop valve body. When there is a leak on the sealing surface of the stop valve body, the gas will float to the bottom of the stop valve body through the gap in the sealing surface, and the floating gas will be concentratedly blown into the positive funnel below the stop valve body. In the lower air outlet pipe, the lower air outlet pipe will blow gas to one end of the lower balance plate, which can drive the lower balance plate to move, pry the lower push block to move, and thus drive the lower movable block to move, so that the lower annular spring is in a compressed state, and push the lower adjustment frame and the lower marking block to swing, so that the lower marking block fits the stop valve body, marks the stop valve body, and achieves the purpose of blowing air to detect one end of the stop valve body. When the sealing performance above the stop valve body is qualified, the upper telescopic hose can be closed through the switching piece and the connecting piece, and the lower telescopic hose is in an open state. The vacuum pump can draw the gas in the air storage box into the stop valve through the lower telescopic hose. At the bottom of the valve body, when the gas flows at the bottom inside the stop valve body, the gas can be concentratedly blown into the lower air inlet pipe through the reverse funnel at the bottom of the stop valve body. The lower air inlet pipe will blow the gas onto the sealing surface on the inside of the stop valve body. When there is a leak on the sealing surface of the stop valve body, the gas will float to the top of the stop valve body through the gap in the sealing surface. The floating gas will be concentratedly blown into the upper air outlet pipe through the positive funnel above the stop valve body. The upper air outlet pipe will blow the gas onto one end of the upper balance plate, which can drive the upper balance plate to move, pry the upper push block to move, and the upper push block can drive the upper movable block to move, so that the upper annular spring is in the In the compressed state, when the upper movable block moves, it can push the upper adjusting frame and the upper marking block to swing, so that the upper marking block fits with the stop valve body, marks the stop valve body, and realizes the purpose of blowing detection at the other end of the stop valve body. It can complete the two-way blowing detection of the stop valve body, so that the subsequent staff can quickly judge the air tightness of the inside of the stop valve body. Therefore, when there is a gap on the inner side of the stop valve body, the marking block will mark the stop valve body, and the air pressure of the stop valve body can be detected by the air pressure sensor. When the air pressure sensor detects that the air pressure of the stop valve body has not changed for a period of time, it indicates that the sealing performance below the stop valve body is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0045] Figure 2 A cross-sectional view of the paint filling box connection structure in the embodiment of the present application;

[0046] Figure 3 A cross-sectional view of the connection structure of the detection frame in the embodiment of the present application;

[0047] Figure 4 Appearance diagram of the sealing cover connection structure in the embodiment of the present application;

[0048] Figure 5 Appearance diagram of the paint storage box connection structure in the embodiment of the present application;

[0049] Figure 6 Embodiments of the present application Figure 2 Enlarged view of point B in the middle;

[0050] Figure 7 Embodiments of the present application Figure 3 Enlarged view of point D in the middle;

[0051] Figure 8 Embodiments of the present application Figure 3 Enlarged view of point E in the middle;

[0052] Figure 9 Embodiments of the present application Figure 2 Enlarged view of point C in the middle;

[0053] Figure 10 Embodiments of the present application Figure 2 Enlarged view of point A in the middle.

[0054] Figure numerals: 1, detection frame; 2, motor; 3, bidirectional screw; 4, threaded push block; 5, sealing cover; 6, sealing gasket; 7, intelligent sensor; 8, first pressure sensor; 9, air storage box; 10, vacuum pump; 11, telescopic hose; 12, servo motor; 13, movable gear; 14, movable rack; 15, wind shield; 16, fixed outer cylinder; 17, movable inner rod; 18, switching plate; 19, telescopic spring; 20, arc-shaped block; 21, straight-through stop valve; 22, movable block; 23, annular spring; 24, adjustment frame; 25, marking block; 26, coil spring; 27, forward funnel; 28, reverse funnel; 29, airbag ;30. Outlet pipe;31. Inlet pipe;32. Second pressure sensor;33. Connecting pipe;34. Solenoid valve;35. Balance plate;36. Push block;37. Paint storage box;38. Connecting pipe;39. Paint plate;40. Compression spring;41. Paint filling box;42. Partition plate;43. First bevel gear;44. Second bevel gear;45. Threaded rod;46. Movable frame;47. Extrusion plate;48. Connecting spring;49. Wedge block;50. Paint filling hose;51. Annular pipe;52. Paint spray head;53. Drive motor;54. Rotating disk;55. Fixed frame;56. Threaded clamp;57. Movable clamp;58. Air pressure sensor. DETAILED DESCRIPTION

[0055] The following is combined with Figure 1-10 This application is described in further detail.

[0056] Example 1:

[0057] The present application discloses an air tightness detection device for a straight-through stop valve. Figure 1 and Figure 2 , including a detection frame 1, an intelligent sensor 7 fixed on the detection frame 1, a processing mechanism for sealing, detecting, marking and painting the stop valve body 21, and a conveying member for conveying multiple stop valve bodies 21, the processing mechanism includes a sealing component, a detection component, a marking component and a painting component; the sealing component includes two sealing covers 5 movably arranged on the stop valve body 21, a first pressure sensor 8, an air pressure sensor 58 and a forward funnel 27 respectively fixed on the two sealing covers 5, a synchronizing member for synchronously adjusting the two sealing covers 5, and a sealing member for sealing the forward funnel 27 and the inner wall of the stop valve body 21; the marking component includes two marking blocks 25 rotatably arranged on the detection frame 1, an adjusting member for rotating and adjusting the marking block 25, and a member for rotating and adjusting the marking block 25. The regulating member is indirectly driven by a driving member; the detection component includes an air storage tank 9 fixed on the detection frame 1, two telescopic hoses 11 fixed on the air storage tank 9, a switching member for switching and opening the two telescopic hoses 11, and a connecting member for switching and adjusting the two marking blocks 25, the connecting member is synchronously driven by the switching member, and the air storage tank 9 is used to store aminosilane gas; the painting component includes a paint filling box 41 and a paint storage box 37 fixed on the detection frame 1, an annular tube 51 respectively fixed on the two sealing covers 5, a plurality of paint spray heads 52 respectively fixed on the two annular tubes 51, a paint filling member for filling the plurality of paint spray heads 52 with paint, and a paint filling member for regularly filling the paint filling box 41 with paint, the paint filling member is synchronously driven by a synchronizing member, and the paint storage box 37 is used to store yellow acrylic resin paint.

[0058] The synchronous parts include a threaded push block 4 and a sealing gasket 6 respectively fixed on the two sealing covers 5, a bidirectional screw 3 rotatably arranged on the detection frame 1, and a motor 2 fixed on the detection frame 1, the bidirectional screw 3 is connected to the output end of the motor 2, the two threaded push blocks 4 are threadedly connected to the bidirectional screw 3, the outer side of the bidirectional screw 3 is provided with two thread grooves, and the outer threads of the two thread grooves are in opposite directions, the inner sides of the two threaded push blocks 4 are respectively provided with threaded holes adapted to the two thread grooves, the outer sides of the two sealing covers 5 are fixedly connected to the limited push blocks, the inner side of the detection frame 1 is fixedly connected with a guide rod, the inner sides of the two limit push blocks are provided with guide holes with the same diameter as the guide rod, the two guide holes are slidably connected to the guide rod, and the two threaded push blocks 4 can be limited to rotate in a circle through the two guide holes and the guide rod. The two sealing gaskets 6 are respectively movably fitted with the top and bottom ends of the stop valve body 21, the two first pressure sensors 8 are respectively connected to the two sealing gaskets 6, and the two first pressure sensors 8 are electrically connected to the motor 2.

[0059] The switching component includes a windshield 15 movably arranged on the two telescopic hoses 11, a movable rack 14 fixed on the two windshields 15, a movable gear 13 rotatably arranged on the air storage box 9, and a servo motor 12 fixed on the air storage box 9. The two movable racks 14 are movably engaged with the movable gear 13, and the movable gear 13 is connected to the output end of the servo motor 12. Fixed square holes are provided on the two telescopic hoses 11, and the two windshields 15 are slidably connected to the two fixed square holes. The two telescopic hoses 11 are respectively connected to the two sealing covers 5, and the two telescopic hoses 11 are connected to the air storage box 9. An air pump 10 and a booster pump are fixedly connected to the air storage box 9, and two air pressure sensors 58 are respectively connected to the two sealing covers 5. An inflation pipe is fixedly connected to the air storage box 9, and a fixed valve is fixedly installed on the outside of the inflation pipe. Aminosilane gas can be added to the air storage box 9 through the inflation pipe, and the inflation pipe can be opened or closed by the fixed valve.

[0060] The connecting parts include a switching plate 18 movably arranged on the two sealing covers 5, a fixed outer cylinder 16 fixed on the movable rack 14, a movable inner rod 17 movably arranged on the fixed outer cylinder 16, a telescopic spring 19 fixed on the movable inner rod 17, and an arc-shaped clamping block 20 fixed on the telescopic spring 19. Two arc-shaped grooves are provided on the inner side of the fixed outer cylinder 16, and the two arc-shaped grooves are movably engaged with the arc-shaped clamping block 20. The two switching plates 18 are respectively fixedly connected to the two movable inner rods 17, a fixed slide is provided on the fixed outer cylinder 16, and the movable inner rod 17 is slidably connected to the fixed slide. The number of the switching plates 18, movable rack 14, fixed outer cylinder 16, movable inner rod 17, telescopic spring 19 and arc-shaped clamping block 20 is two, and the inner side of each fixed outer cylinder 16 is provided with two arc-shaped grooves. The inner sides of the two sealing covers 5 are provided with connecting holes, and the two switching plates 18 are slidably connected to the two connecting holes.

[0061] The adjusting member includes a movable block 22 and an adjusting frame 24 which are respectively movably arranged on the two sealing covers 5, and an annular spring 23 and a coil spring 26 which are respectively fixed on the two sealing covers 5. The two annular springs 23 are respectively fixedly connected to the two movable blocks 22, the two adjusting frames 24 are respectively movably fitted with the two movable blocks 22, the two adjusting frames 24 are respectively hinged to the two sealing covers 5, the two movable blocks 22 are respectively movably fitted with the two switching plates 18, the two marking blocks 25 are respectively fixedly connected to the two adjusting frames 24, the two marking blocks 25 are both movably fitted with the stop valve body 21, the two coil springs 26 are respectively fixedly connected to the two adjusting frames 24, the inner sides of the two sealing covers 5 are provided with sealing holes, and the two movable blocks 22 are respectively slidably connected to the two sealing holes.

[0062] The driving member includes a balancing plate 35 movably arranged on the two sealing covers 5, a reverse funnel 28 fixed on the forward funnel 27, an air outlet pipe 30 fixed on the forward funnel 27, an air inlet pipe 31 fixed on the reverse funnel 28, and a pushing block 36 fixed on the balancing plate 35. The pushing block 36 is movably fitted with the movable block 22. The air outlet of the air outlet pipe 30 is located at one end of the balancing plate 35, and the pushing block 36 is located at the other end of the balancing plate 35. The balancing plate 35 is hinged to the sealing cover 5, the reverse funnel 28 is connected to the air inlet pipe 31, and the forward funnel 27 is connected to the air outlet pipe 30. The number of the balancing plate 35, the forward funnel 27, the reverse funnel 28, the air inlet pipe 31, the air outlet pipe 30 and the pushing block 36 are all two. Movable holes are provided on the two sealing covers 5, and the two movable blocks 22 are slidably connected to the two movable holes respectively.

[0063] The sealing component includes an airbag 29 fixed on the forward funnel 27, a second pressure sensor 32 fixed on the airbag 29, a connecting pipe 33 fixed on the airbag 29, and a solenoid valve 34 fixed on the connecting pipe 33. The two sealing covers 5 are fixedly connected to the connecting pipe 33. The second pressure sensor 32 and the air pressure sensor 58 are electrically connected to the solenoid valve 34. The airbag 29 is fixed to the outside of the forward funnel 27 and the reverse funnel 28. The second pressure sensor 32 and the airbag 29 are movably fitted with the inner wall of the shut-off valve body 21. There are two of each of the forward funnel 27, the reverse funnel 28, the airbag 29, the second pressure sensor 32 and the solenoid valve 34. The two airbags 29 are both connected to the connecting pipe 33. The air inlet of the connecting pipe 33 is connected to the air storage tank 9. The air inlet of the connecting pipe 33 is located between the two wind shields 15. The marking block 25 can be an ink block or a dye block. Any object that can be used to mark the shut-off valve body 21 can be used.

[0064] The paint filling parts include a squeeze plate 47 movably arranged on the inside of the paint filling box 41, two paint filling hoses 50 fixed on the paint filling box 41, a partition plate 42 fixed on the inside of the paint filling box 41, a movable frame 46 fixed on the squeeze plate 47, a threaded rod 45 rotatably arranged on the paint filling box 41, a first bevel gear 43 and a second bevel gear 44, the movable frame 46 is threadedly connected to the threaded rod 45, the threaded rod 45 is fixedly connected to the second bevel gear 44, the first bevel gear 43 is fixedly connected to the bidirectional screw 3, and the inner side of the partition plate 42 is provided with a fixed Fixed hole, the movable frame 46 is slidably connected to the fixed hole, the extrusion plate 47 is movably fitted with the partition plate 42, the two paint filling hoses 50 are respectively connected to the two annular tubes 51, and the two paint filling hoses 50 are both connected to the paint filling box 41. The number of multiple paint spray heads 52 is two groups, and the two groups of paint spray heads 52 are respectively arranged at equal distances on the two annular tubes 51. The outer sides of the two paint filling hoses 50 are fixedly connected with control valves, and the movable frame 46 can be restricted from rotating in a circle through the fixed hole, and the two paint filling hoses 50 can be opened or closed through the control valve.

[0065] The paint filling parts include a connecting pipe 38 fixed on the paint filling box 41, a painting plate 39 movably arranged on the connecting pipe 38, two compression springs 40 fixed on the connecting pipe 38, two connecting springs 48 fixed on the extrusion plate 47 and a wedge block 49 fixed on the connecting spring 48. The paint filling box 41 and the paint storage box 37 are both connected to the connecting pipe 38. The connecting pipe 38 is provided with a connecting square hole. The painting plate 39 is slidably connected to the connecting square hole. The two compression springs 40 are fixedly connected to the painting plate 39. The painting plate 39 is movably fitted with the wedge block 49. A fixing groove is provided on the inner side of the painting plate 39. The connecting spring 48 and the wedge block 49 are both located on the inner side of the fixing groove. A feeding pipe is connected to the paint storage box 37. A connecting cover is movably connected to the feeding pipe. The feeding pipe can add yellow acrylic resin paint to the paint storage box 37.

[0066] The transmission member includes a rotating disk 54 rotatably arranged on the detection frame 1, a plurality of fixed frames 55 fixed on the rotating disk 54, threaded clamping blocks 56 rotatably arranged on the plurality of fixed frames 55, movable clamping blocks 57 respectively fixed on the plurality of threaded clamping blocks 56, and a driving motor 53 fixed on the detection frame 1. The rotating disk 54 is connected to the output end of the driving motor 53. The plurality of movable clamping blocks 57 and the plurality of fixed frames 55 are respectively movably fitted with the plurality of stop valve bodies 21. The plurality of threaded clamping blocks 56 are respectively threadedly connected to the plurality of fixed frames 55. The threaded clamping blocks 56 are respectively threadedly connected to the plurality of fixed frames 55. It consists of a screw, a rolling bearing and a rotating handle. The rolling bearing can limit the movable clamp 57 to rotate in a circle. The motor 2, two first pressure sensors 8, the air pump 10, the booster pump, the servo motor 12, two second pressure sensors 32, two solenoid valves 34 and the drive motor 53 are all electrically connected to the intelligent sensor 7. The intelligent sensor 7 can control the timing of opening and closing of the motor 2, two first pressure sensors 8, the air pump 10, the booster pump, the servo motor 12, two second pressure sensors 32, two solenoid valves 34 and the drive motor 53.

[0067] The implementation principle of the air tightness detection device for a straight-through stop valve in the embodiment of the present application is as follows:

[0068] (1) Place multiple shut-off valve bodies 21 that need to be tested for air tightness on multiple fixing racks 55, and keep the multiple shut-off valve bodies 21 in a closed state. By rotating the multiple threaded clamps 56, the multiple movable clamps 57 can be driven to move. The multiple fixing racks 55 can be used to clamp and fix the multiple shut-off valve bodies 21, thereby preventing the shut-off valve bodies 21 from shaking or falling off during testing, thereby ensuring the effect of the shut-off valve body 21 testing.

[0069] (2) The driving motor 53 can sequentially drive the rotating disk 54, the multiple fixing frames 55 and the multiple stop valve bodies 21 to rotate, and then the multiple stop valve bodies 21 that need to be tested can be transported, so that the multiple stop valve bodies 21 that need to be tested can be sequentially transported between the two sealing covers 5, so that the multiple stop valve bodies 21 can be tested in sequence, and the tested stop valve bodies 21 can be transported away. At the same time, when the stop valve body 21 is tested, the threaded clamping block 56 is rotated in the opposite direction to drive the movable clamping block 57 to move, so that the movable clamping block 57 is separated from the stop valve body 21, and then the stop valve body 21 can be tested. The valve body 21 is disassembled to facilitate the rapid replacement of other stop valve bodies 21 that need to be tested, so as to facilitate the testing of multiple stop valve bodies 21. At the same time, after the air tightness of the stop valve body 21 is tested, the motor 2 can drive the bidirectional screw 3 to rotate counterclockwise, so that when the bidirectional screw 3 rotates, it will respectively drive the two sealing covers 5, the two sealing gaskets 6, the two air pressure sensors 58 and the two first pressure sensors 8 to move in opposite directions. When the two sealing covers 5 and the two sealing gaskets 6 move in opposite directions, they will be separated from the stop valve body 21, so that the tested stop valve body 21 can be transported away and disassembled;

[0070] (3) The motor 2 can drive the bidirectional screw 3 to rotate clockwise. Since the two threaded push blocks 4 are both threadedly connected to the bidirectional screw 3, the bidirectional screw 3 will drive the two sealing covers 5, the two sealing gaskets 6, the two air pressure sensors 58 and the two first pressure sensors 8 to move relative to each other when the bidirectional screw 3 rotates. When the two sealing gaskets 6 move relative to each other, they will fit with the stop valve body 21, so that the two sealing covers 5 can seal the top and bottom of the stop valve body 21. When the two sealing gaskets 6 gradually fit with the stop valve body 21, the two first pressure sensors 8 can detect the pressure generated by the two sealing gaskets 6 on the two end faces of the stop valve body 21 respectively. When the two first pressure sensors 8 detect that the pressure of the two sealing gaskets 6 reaches the limit, it means that the two sealing gaskets 6 are completely fitted with the two end faces of the stop valve body 21, and the two sealing covers 5 are completely sealed with the two end faces of the stop valve body 21. The first pressure sensor 8 will transmit a signal to the motor 2 to stop the motor 2 from driving, so that the two sealing covers 5 remain in the current position to seal the top and bottom of the stop valve body 21.

[0071] (4) When the bidirectional screw 3 rotates, it will also drive the first bevel gear 43, the second bevel gear 44 and the threaded rod 45 to rotate in turn, and will drive the movable frame 46 and the extrusion plate 47 to move in turn. When the extrusion plate 47 moves, it can squeeze the paint in the paint filling box 41. When the extrusion plate 47 squeezes the paint in the paint filling box 41 to the left, the wedge block 49 will fit and squeeze the inner wall of the paint filling box 41, so that the connecting spring 48 can be in an extrusion state, so that the wedge block 49 moves to the inside of the extrusion plate 47. When the wedge block 49 moves to the inside of the extrusion plate 47, the wedge block 49 will separate from the painting plate 39. The elastic force of the compression spring 40 can drive the painting plate 39 to move to the right, and the connecting pipe 38 can be sealed and closed to avoid extrusion. When the material plate 47 squeezes the paint in the paint filling box 41, the paint in the paint storage box 37 is still adding paint to the inner side of the paint filling box 41 to prevent the paint from flowing to the left side of the material squeezing plate 47 and causing interference. The material squeezing plate 47 will squeeze the paint into the two paint filling hoses 50, the two annular tubes 51 and the two sets of paint spray heads 52 in sequence. The two sets of paint spray heads 52 will spray the paint on the upper and lower sides of the outer side of the stop valve body 21 respectively. When the two sealing covers 5 move relative to each other to seal the two end surfaces of the stop valve body 21, the two sets of paint spray heads 52 will spray the paint evenly on the upper and lower sides of the outer side of the stop valve body 21, thereby ensuring the effect of painting on both sides of the stop valve body 21, and achieving the purpose of painting on both end surfaces of the stop valve body 21;

[0072] (5) At the same time, when the bidirectional screw 3 rotates counterclockwise, it will also drive the first bevel gear 43, the second bevel gear 44 and the threaded rod 45 to rotate counterclockwise in sequence, and then drive the movable frame 46 and the extrusion plate 47 to move leftward in sequence. When the extrusion plate 47 moves leftward and corresponds to the connecting pipe 38, the wedge block 49 will lose its limit. Through the elastic force of the connecting spring 48, the wedge block 49 can be moved to the inner side of the connecting pipe 38 and fit with the painting plate 39. Then, when the extrusion plate 47 moves leftward, the compression spring 40 is in a pulling state, which also pushes the painting plate 39. Move leftward to open the connecting pipe 38, and then the paint in the paint storage box 37 will flow into the paint filling box 41 through the connecting pipe 38, and paint can be added to the paint filling box 41. In this way, the paint can be quantitatively measured, and a specified amount of paint can be added to the inside of the paint filling box 41 to avoid excessive or insufficient paint in the paint filling box 41. When the sealing cover 5 seals the stop valve body 21, the outer end surface of the stop valve body 21 can be sprayed with paint in multiple areas. When the sealing cover 5 is separated from the stop valve body 21, the extrusion and spraying of the paint can be stopped.

[0073] (6) When it is necessary to detect whether there are cracks and sand holes on the upper side of the stop valve body 21, and it is also necessary to blow air from the upper side of the stop valve body 21 to the lower side to detect the sealing of the inner side of the stop valve body 21, the servo motor 12 can first drive the movable gear 13 to rotate clockwise. Because the two movable racks 14 are engaged with the movable gear 13, the movable gear 13 will drive the two movable racks 14, the two windshields 15, the two fixed outer cylinders 16, the two movable inner rods 17 and the two switching plates 18 to move in opposite directions. When the two windshields 15 move in opposite directions, the two telescopic hoses 11 can be opened and closed, so that the upper telescopic hose 11 is in the open state and the lower telescopic hose 11 is in the closed state. When the upper telescopic hose 11 is in the closed state and the two switching plates 18 move in opposite directions, the two movable blocks 22 can be opened and closed, so that the upper movable block 22 is in contact with the switching plate 18 and is in the closed state, and the lower movable block 22 is separated from the switching plate 18 and is in the open state. Because the upper telescopic hose 11 is in the open state and the lower telescopic hose 11 is in the closed state, the air pump 10 can draw the gas in the gas storage tank 9 into the upper part of the stop valve body 21 through the upper telescopic hose 11, and the air tightness of the stop valve body 21 can be detected. The air pressure can be increased by the booster pump when the air pump 10 is pumping air, so as to ensure the accuracy of the gas detection of the stop valve body 21;

[0074] (7) When there are cracks and sand holes on the upper side of the stop valve body 21, the gas inside the stop valve body 21 will be blown away through the cracks and sand holes. Because there is yellow acrylic resin paint on the outside of the stop valve body 21, the aminosilane gas in the stop valve body 21 will react with the yellow acrylic resin paint when it is blown away from the cracks and sand holes, resulting in a color change. The color of the yellow acrylic resin paint will turn yellow-green or orange-yellow, so that the subsequent staff can quickly judge whether there are cracks and sand holes on the outside of the stop valve body 21, and at the same time, the staff can quickly know whether the stop valve body 21 is cracked. The position of cracks and sand holes is determined so as to facilitate welding maintenance of the stop valve body 21. At the same time, the upper movable block 22 is closed at this time to prevent the upper movable block 22 and the upper marking block 25 from being pushed to move due to excessive air pressure when the upper telescopic hose 11 blows air to the upper inside of the stop valve body 21, thereby achieving the purpose of detecting cracks and sand holes on the upper side of the stop valve body 21. If the paint color on the outer side of the stop valve body 21 does not change, it means that there are no cracks and sand holes on the upper side of the stop valve body 21, thereby achieving the purpose of detecting cracks and sand holes on the upper side of the stop valve body 21.

[0075] (8) At the same time, when the gas flows above the inner side of the stop valve body 21, the gas can be concentratedly blown into the upper air inlet pipe 31 through the reverse funnel 28 above the stop valve body 21, and then the upper air inlet pipe 31 will blow the gas onto the sealing surface inside the stop valve body 21. When there is a leak on the sealing surface of the stop valve body 21, the gas will float to the bottom of the stop valve body 21 through the gap of the sealing surface, and then the floating gas will be concentratedly blown into the lower air outlet pipe 30 through the forward funnel 27 below the stop valve body 21. The lower air outlet pipe 30 will blow the gas onto one end of the lower balance plate 35, which can drive the lower balance plate 35 to move, and then pry the lower push block 36 to move. The lower push block 36 can drive the lower movable block 22 to move, so that the lower annular spring 23 is in a compressed state. When the lower movable block 22 moves, it can push the lower adjustment frame 24 and the lower marking block 25 to swing, so that the lower marking block 25 is aligned with the stop valve body. When the air pressure sensor 58 detects that the air pressure above the stop valve body 21 has not changed for a period of time, it indicates that the sealing performance above the stop valve body 21 is good, and a signal can be sent to the air pump 10 to stop the air extraction test above the stop valve body 21, thereby achieving the purpose of air leakage detection at one end of the stop valve body 21;

[0076] (9) When the air is blown from one end of the stop valve body 21 and no air leakage is detected, the servo motor 12 is used to drive the movable gear 13 to rotate counterclockwise according to the above principle, and then the two windshield plates 15 and the two switching plates 18 are driven to move relative to each other in turn, so that the upper telescopic hose 11 is in a closed state and the lower telescopic hose 11 is in an open state. The upper movable block 22 is separated from the switching plate 18 and is in an open state, and the lower movable block 22 is fitted with the switching plate 18 and is in a closed state. Because the upper telescopic hose 11 is in a closed state and the lower telescopic hose 11 is in an open state, the air pump 10 can draw the gas in the air storage box 9 into the lower part of the stop valve body 21 through the lower telescopic hose 11. At the same time, when there are cracks and sand holes on the lower side of the stop valve body 21, the gas inside the stop valve body 21 will be blown away through the cracks and sand holes, so the stop valve body 21 When the aminosilane gas in the sealant is blown away from the cracks and sand holes, it will react with the yellow acrylic resin paint to produce a color change, and the paint color will turn yellow-green or orange-yellow, so that subsequent staff can quickly judge whether there are cracks and sand holes on the outside of the stop valve body 21, and at the same time, the staff can quickly know the location of the cracks and sand holes on the stop valve body 21, so as to facilitate welding and repair of the stop valve body 21. At the same time, the lower movable block 22 is closed at this time, which can prevent the lower movable block 22 and the lower marking block 25 from being pushed to move due to excessive air pressure when the lower telescopic hose 11 blows air to the lower inside of the stop valve body 21, thereby achieving the purpose of detecting cracks and sand holes on the lower side of the stop valve body 21. If the paint color on the outside of the stop valve body 21 does not change, it means that there are no cracks and sand holes on the lower side of the stop valve body 21, thereby achieving the purpose of detecting cracks and sand holes on the lower side of the stop valve body 21.

[0077] (10) At the same time, when the gas flows at the lower side of the stop valve body 21, the gas can be concentratedly blown into the lower air inlet pipe 31 through the reverse funnel 28 at the lower side of the stop valve body 21. The lower air inlet pipe 31 will blow the gas onto the sealing surface on the inner side of the stop valve body 21. When there is a leak on the sealing surface of the stop valve body 21, the gas will float to the upper side of the stop valve body 21 through the gap of the sealing surface. The floating gas will be concentratedly blown into the upper air outlet pipe 30 through the forward funnel 27 above the stop valve body 21. The upper air outlet pipe 30 will blow the gas onto one end of the upper balance plate 35, which can drive the upper balance plate 35 to move, and then pry the upper push block 36 to move. The upper push block 36 can drive the upper movable block 22 to move, so that the upper annular spring 23 is in a compressed state. When the upper movable block 22 moves, it can push the upper adjustment frame 24 and The upper marking block 25 swings so that the upper marking block 25 fits with the stop valve body 21 and marks the stop valve body 21, so that subsequent staff can quickly judge the air tightness of the inner side of the stop valve body 21, thereby achieving the purpose of air tightness detection of the stop valve body 21. Therefore, when there is a gap on the inner side of the stop valve body 21, the marking block 25 will mark the stop valve body 21, and the air pressure below the stop valve body 21 can be detected by the lower air pressure sensor 58. When the air pressure sensor 58 detects that the air pressure below the stop valve body 21 does not change for a period of time, it indicates that the sealing performance below the stop valve body 21 is good, and a signal can be transmitted to the air extraction pump 10 to stop the air extraction detection below the stop valve body 21, thereby achieving the purpose of air blowing detection at the other end of the stop valve body 21, and completing the two-way air blowing detection of the stop valve body 21.

[0078] (11) When the two sealing covers 5 move relative to or away from each other, they will also drive the two switching plates 18 and the two movable inner rods 17 to move relative to or away from each other. The movable inner rod 17 will slide in the fixed outer cylinder 16. When the movable inner rod 17 moves, the telescopic spring 19 will be in a compressed state, so that the arc-shaped clamping block 20 will also move with the movable inner rod 17. When the sealing cover 5 fits the end face of the stop valve body 21 or the sealing cover 5 is separated from the end face of the stop valve body 21, the arc-shaped clamping block 20 will correspond to the specified arc-shaped clamping groove. The elastic force of the telescopic spring 19 can move the arc-shaped clamping block 20 to the corresponding arc-shaped clamping groove, which can limit the movable inner rod 17 and prevent the movable inner rod 17 from shaking at will.

[0079] (12) When the air storage tank 9 and the telescopic hose 11 blow air into the interior of the stop valve body 21, the gas in the air storage tank 9 can also be blown into the two air bags 29 through the connecting pipe 33, so that the two air bags 29 can be expanded and the two air bags 29 can be tightly fitted with the interior of the stop valve body 21, ensuring the sealing of the two forward funnels 27 and the two reverse funnels 28 with the inner wall of the stop valve body 21, and preventing the gas from floating away from the gap between the two forward funnels 27 and the interior of the stop valve body 21 when the two forward funnels 27 collect gas, so as to ensure the gas collection effect of the two forward funnels 27. The two second pressure sensors 32 can monitor the two air bags 29 and the stop valve body. 21, when the two second pressure sensors 32 detect that the pressure of the two airbags 29 has reached the limit, it means that the two airbags 29 and the inner wall of the shut-off valve body 21 are completely in a sealed state. The two second pressure sensors 32 will transmit a signal to the solenoid valve 34, so that the solenoid valve 34 closes the connecting pipe 33, stops the connecting pipe 33 from supplying gas to the airbags 29, and avoids the airbags 29 from bursting due to excessive gas. At the same time, when the shut-off valve body 21 is detected, the air pressure sensor 58 will transmit a signal to the solenoid valve 34 to open the connecting pipe 33, and the gas in the airbag 29 can be put into the gas storage box 9 through the connecting pipe 33 to facilitate gas recovery.

[0080] Example 2:

[0081] The present application also discloses an air tightness detection method applicable to a straight-through stop valve. The air tightness detection device applicable to a straight-through stop valve according to the first embodiment includes the following steps:

[0082] S1. The conveying member can clamp and fix multiple stop valve bodies 21, and can also convey multiple stop valve bodies 21 that need to be tested. The multiple stop valve bodies 21 that need to be tested are sequentially conveyed to between the two sealing covers 5, so that the multiple stop valve bodies 21 are sequentially tested;

[0083] S2. The synchronizer can drive the two sealing gaskets 6 to move relative to each other, thereby sealing the top and bottom of the stop valve body 21. Simultaneously, the synchronizer can indirectly drive the paint filling unit, which squeezes the yellow acrylic resin paint in the paint filling box 41 into the two sets of paint spray heads 52, thereby spraying the paint on the upper and lower sides of the outer side of the stop valve body 21. While the sealing cover 5 is sealing the stop valve body 21, the outer end surface of the stop valve body 21 can be painted in multiple areas. The paint filling unit can indirectly drive the paint filling unit, which can add paint to the paint filling box 41 and quantify the paint, thereby adding a specified amount of paint to the inner side of the paint filling box 41.

[0084] S3. When it is necessary to detect whether there are cracks and sand holes on the upper side of the stop valve body 21, the switching member and the connecting member are driven to draw aminosilane gas into the upper part of the stop valve body 21. When it is necessary to detect whether there are cracks and sand holes on the lower side of the stop valve body 21, the switching member and the connecting member are driven to draw gas into the lower part of the stop valve body 21. Then, when cracks and sand holes are present on the outer side of the stop valve body 21, the gas inside the stop valve body 21 will be blown away through the cracks and sand holes. Because the outer side of the stop valve body 21 is coated with yellow acrylic resin, Therefore, when the aminosilane gas in the stop valve body 21 is blown away from the cracks and sand holes, it will react with the yellow acrylic resin paint to produce a color change, and the paint color will turn yellow-green or orange-yellow, so that subsequent staff can quickly determine whether there are cracks and sand holes on the outside of the stop valve body 21. The staff can quickly know the location of the cracks and sand holes in the stop valve body 21 to facilitate welding and repair of the stop valve body 21. If the color of the paint on the outside of the stop valve body 21 does not change, it means that there are no cracks and sand holes on the outside of the stop valve body 21.

[0085] S4. When it is necessary to test the sealing of the inside of the stop valve body 21, first ensure the sealing of the two forward funnels 27 and the two reverse funnels 28 with the inner wall of the stop valve body 21 by driving the sealing member, and then draw the gas into the upper part of the stop valve body 21 through the switching member and the connecting member, and the gas can be concentratedly blown into the upper air inlet pipe 31 through the reverse funnel 28 above the stop valve body 21, and then blown on the sealing surface inside the stop valve body 21. When there is a gas leak on the sealing surface of the stop valve body 21, the gas will float to the bottom of the stop valve body 21 through the gap in the sealing surface, and the floating gas will be concentratedly blown into the lower air outlet pipe 30 through the forward funnel 27 below the stop valve body 21, and then the regulating member can be driven to drive the lower marking block 25 to swing, thereby marking the stop valve body 21, and achieving the purpose of blowing detection at one end of the stop valve body 21;

[0086] When the air pressure sensor 58 detects that the air pressure of the shut-off valve body 21 has not changed for a period of time, it indicates that the airtightness of the upper and lower parts of the shut-off valve body 21 is qualified.

[0087] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An air tightness detection device suitable for a straight-through stop valve, characterized by: The invention comprises a detection frame (1), an intelligent sensor (7) fixed on the detection frame (1), a processing mechanism for sealing, detecting, marking and painting a stop valve body (21), and a conveying member for conveying a plurality of stop valve bodies (21), wherein the processing mechanism comprises a sealing component, a detection component, a marking component and a painting component; The sealing assembly comprises two sealing covers (5) movably arranged on the stop valve body (21), a first pressure sensor (8) respectively fixed on the two sealing covers (5), an air pressure sensor (58) and a forward funnel (27), a synchronizing member for synchronously adjusting the two sealing covers (5), and a sealing member for sealing the forward funnel (27) and the inner wall of the stop valve body (21); The marking assembly comprises two marking blocks (25) rotatably arranged on the detection frame (1), movable blocks (22) and an adjustment frame (24) movably arranged on the two sealing covers (5), an adjustment member for rotationally adjusting the marking blocks (25), and a driving member for indirectly driving the adjustment member; The detection assembly comprises an air storage box (9) fixed on the detection frame (1), two telescopic hoses (11) fixed on the air storage box (9), a switching plate (18) movably arranged on the two sealing covers (5), a switching member for switching the two telescopic hoses (11) on and off, and a connecting member for switching and adjusting the two marking blocks (25), wherein the connecting member is synchronously driven by the switching member, and the air storage box (9) is used to store aminosilane gas; The switching member comprises windshields (15) movably arranged on the two telescopic hoses (11), movable racks (14) fixed on the two windshields (15), a movable gear (13) rotatably arranged on the air storage box (9), and a servo motor (12) fixed on the air storage box (9), the two movable racks (14) are movably engaged with the movable gear (13), the movable gear (13) is connected to the output end of the servo motor (12), the two telescopic hoses (11) are respectively connected to the two sealing covers (5), the two telescopic hoses (11) are respectively connected to the air storage box (9), an air pump (10) is provided on the air storage box (9), and the two air pressure sensors (58) are respectively connected to the two sealing covers (5); The driving member comprises a balance plate (35) movably arranged on the two sealing covers (5), a reverse funnel (28) fixed on the forward funnel (27), an air outlet pipe (30) fixed on the forward funnel (27), an air inlet pipe (31) fixed on the reverse funnel (28), and a push block (36) fixed on the balance plate (35), wherein the push block (36) is movably fitted with the movable block (22), and the air outlet of the air outlet pipe (30) is located at the balance plate (35). One end of the balance plate (35), the pushing block (36) is located at the other end of the balance plate (35), the balance plate (35) is hinged to the sealing cover (5), the reverse funnel (28) is connected to the air inlet pipe (31), the forward funnel (27) is connected to the air outlet pipe (30), and the number of the balance plate (35), the forward funnel (27), the reverse funnel (28), the air inlet pipe (31), the air outlet pipe (30) and the pushing block (36) are all two.

2. The air tightness detection device for a straight-through stop valve according to claim 1, characterized in that: The painting assembly comprises a paint filling box (41) and a paint storage box (37) fixed on the detection frame (1), an annular tube (51) respectively fixed on two sealing covers (5), a plurality of paint spray heads (52) respectively fixed on the two annular tubes (51), a paint filling component for filling the plurality of paint spray heads (52) with paint, and a paint filling component for regularly filling the paint filling box (41) with paint, wherein the paint filling component is synchronously driven by a synchronous component, and the paint storage box (37) is used to store yellow acrylic resin paint.

3. The air tightness detection device for a straight-through stop valve according to claim 2, characterized in that: The synchronization component comprises a threaded push block (4) and a sealing gasket (6) respectively fixed on the two sealing covers (5), a bidirectional screw (3) rotatably arranged on the detection frame (1), and a motor (2) fixed on the detection frame (1), the bidirectional screw (3) is connected to the output end of the motor (2), the two threaded push blocks (4) are both threadedly connected to the bidirectional screw (3), the two sealing gaskets (6) are movably fitted with the top and bottom ends of the stop valve body (21), the two first pressure sensors (8) are respectively connected to the two sealing gaskets (6), and the two first pressure sensors (8) are both electrically connected to the motor (2).

4. The air tightness detection device for a straight-through stop valve according to claim 1, characterized in that: The connecting member comprises a fixed outer cylinder (16) fixed on the movable rack (14), a movable inner rod (17) movably arranged on the fixed outer cylinder (16), a telescopic spring (19) fixed on the movable inner rod (17), and an arc-shaped clamping block (20) fixed on the telescopic spring (19). Two arc-shaped clamping grooves are provided on the inner side of the fixed outer cylinder (16), and the two arc-shaped clamping grooves are movably clamped with the arc-shaped clamping block (20). The two switching plates (18) are fixedly connected to the two movable inner rods (17) respectively. The number of the switching plate (18), the movable rack (14), the fixed outer cylinder (16), the movable inner rod (17), the telescopic spring (19) and the arc-shaped clamping block (20) is two.

5. The air tightness detection device for a straight-through stop valve according to claim 1, characterized in that: The regulating member comprises an annular spring (23) and a coil spring (26) respectively fixed on the two sealing covers (5); the two annular springs (23) are respectively fixedly connected to the two movable blocks (22); the two regulating frames (24) are respectively movably fitted with the two movable blocks (22); the two regulating frames (24) are respectively hinged to the two sealing covers (5); the two movable blocks (22) are respectively movably fitted with the two switching plates (18); the two marking blocks (25) are respectively fixedly connected to the two regulating frames (24); the two marking blocks (25) are both movably fitted with the stop valve body (21); and the two coil springs (26) are respectively fixedly connected to the two regulating frames (24).

6. The air tightness detection device for a straight-through stop valve according to claim 1, characterized in that: The sealing component includes an airbag (29) fixed on the forward funnel (27), a second pressure sensor (32) fixed on the airbag (29), a connecting pipe (33) fixed on the airbag (29), and a solenoid valve (34) fixed on the connecting pipe (33). The second pressure sensor (32) and the air pressure sensor (58) are both electrically connected to the solenoid valve (34). The airbag (29) is fixed on the outside of the forward funnel (27) and the reverse funnel (28). The second pressure sensor (32) and the airbag (29) are both movably fitted with the inner wall of the stop valve body (21). The number of the forward funnel (27), the reverse funnel (28), the airbag (29), the second pressure sensor (32) and the solenoid valve (34) is two. The two airbags (29) are both connected to the connecting pipe (33). The air inlet of the connecting pipe (33) is connected to the air storage box (9).

7. The air tightness detection device for a straight-through stop valve according to claim 3, characterized in that: The paint filling component includes a material squeezing plate (47) movably arranged on the inner side of the paint filling box (41), two paint filling hoses (50) fixed on the paint filling box (41), a partition plate (42) fixed on the inner side of the paint filling box (41), a movable frame (46) fixed on the material squeezing plate (47), a threaded rod (45) rotatably arranged on the paint filling box (41), a first bevel gear (43) and a second bevel gear (44), the movable frame (46) is threadedly connected to the threaded rod (45), the threaded rod (45) is fixedly connected to the second bevel gear (44), the first bevel gear (43) is fixedly connected to the bidirectional screw (3), and the number of the plurality of paint spray heads (52) is two groups, and the two groups of paint spray heads (52) are arranged at equal distances on the two annular tubes (51).

8. The air tightness detection device for a straight-through stop valve according to claim 7, characterized in that: The paint filling part includes a connecting pipe (38) fixed on the paint filling box (41), a paint plate (39) movably arranged on the connecting pipe (38), two compression springs (40) fixed on the connecting pipe (38), two connecting springs (48) fixed on the extrusion plate (47), and a wedge block (49) fixed on the connecting spring (48). The paint filling box (41) and the paint storage box (37) are both connected to the connecting pipe (38), the two compression springs (40) are both fixedly connected to the paint plate (39), and the paint plate (39) is movably fitted with the wedge block (49).

9. A method for detecting air tightness of a straight-through stop valve, based on the air tightness detecting device for a straight-through stop valve according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. The conveying member clamps and fixes the plurality of stop valve bodies (21), and simultaneously conveys the plurality of stop valve bodies (21) to be inspected, and sequentially conveys the plurality of stop valve bodies (21) to be inspected between the two sealing covers (5), so as to facilitate sequential inspection of the plurality of stop valve bodies (21); S2. When the synchronous member drives the two sealing gaskets (6) to move relative to each other, the top and bottom of the stop valve body (21) are sealed. At the same time, the synchronous member indirectly drives the paint filling member, which squeezes the yellow acrylic resin paint in the paint filling box (41) into the two sets of paint spraying heads (52), so that the paint is sprayed on the upper and lower sides of the outer side of the stop valve body (21). When the sealing cover (5) seals the stop valve body (21), the outer end face of the stop valve body (21) is sprayed with paint. The paint filling member indirectly drives the paint filling member to add paint to the paint filling box (41), quantify the paint, and add a specified amount of paint to the inner side of the paint filling box (41); S3. When it is necessary to detect whether there are cracks and sand holes on the upper side of the stop valve body (21), the switching member and the connecting member are driven to draw aminosilane gas into the upper side of the inside of the stop valve body (21). When it is necessary to detect whether there are cracks and sand holes on the lower side of the stop valve body (21), the switching member and the connecting member are driven to draw gas into the lower side of the inside of the stop valve body (21). Then, when there are cracks and sand holes on the outer side of the stop valve body (21), the gas inside the stop valve body (21) will be blown away through the cracks and sand holes. Because the outer side of the stop valve body (21) has a yellow acrylic resin paint, Therefore, when the aminosilane gas in the stop valve body (21) is blown away from the cracks and sand holes, it will react with the yellow acrylic resin paint to produce a color change, and the paint color will turn yellow-green or orange-yellow, so that the subsequent staff can quickly judge whether there are cracks and sand holes on the outside of the stop valve body (21), and quickly let the staff know the location of the cracks and sand holes on the stop valve body (21), so as to facilitate welding and repair of the stop valve body (21). If the paint color on the outside of the stop valve body (21) does not change, it means that there are no cracks and sand holes on the outside of the stop valve body (21); S4. When it is necessary to test the sealing performance of the inside of the stop valve body (21), the sealing performance of the two forward funnels (27) and the two reverse funnels (28) and the inner wall of the stop valve body (21) is first ensured by driving the sealing member, and then the gas is drawn into the upper part of the stop valve body (21) through the switching member and the connecting member, and the gas is concentratedly blown into the upper air inlet pipe (31) through the reverse funnel (28) above the stop valve body (21), and then blown onto the sealing surface inside the stop valve body (21). When there is a leak on the sealing surface of the stop valve body (21), the gas will float to the bottom of the stop valve body (21) through the gap of the sealing surface, and the floating gas will be concentratedly blown into the lower air outlet pipe (30) through the forward funnel (27) below the stop valve body (21), and then drive the regulating member to drive the lower marking block (25) to swing, marking the stop valve body (21), thereby achieving the purpose of blowing test at one end of the stop valve body (21); S5. When the sealing performance of the stop valve body (21) is qualified, the gas is drawn into the lower part of the stop valve body (21) through the switching member and the connecting member, and the gas is concentratedly blown into the lower air inlet pipe (31) through the reverse funnel (28) below the stop valve body (21). Then, the lower air inlet pipe (31) blows the gas onto the sealing surface inside the stop valve body (21). When there is a leak on the sealing surface of the stop valve body (21), the gas will float to the upper part of the stop valve body (21) through the gap of the sealing surface. The floating gas will pass through the stop valve body (21). The forward funnel (27) above the stop valve body (21) blows concentratedly into the upper air outlet pipe (30), thereby driving the regulating member to drive the upper marking block (25) to swing, marking the stop valve body (21), achieving the purpose of blowing detection at the other end of the stop valve body (21), and thus completing the two-way blowing detection of the stop valve body (21). When the two air pressure sensors (58) detect that the air pressure of the stop valve body (21) has not changed for a period of time, it indicates that the sealing of the upper and lower parts of the stop valve body (21) is qualified.

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