A valve air tightness detection system

Abstract

The present invention relates to the field of valve detection technology, and specifically to a valve air tightness detection system, including an annular test frame, an annular guide rail is arranged in the middle of the annular test frame, and also includes: a unit test seat, a plurality of unit test seats are arranged around the annular guide rail, the unit test seat is slidably connected to the annular guide rail, a center guide groove is arranged in the middle of the unit test seat, and the axial center lines of all the center guide grooves intersect at the center point of the annular guide rail; a test closing seat, which is slidably arranged on the inner side of the center guide groove. A plurality of unit test seats are arranged around the annular guide rail of the present invention, and each unit test seat can individually close an interface of a valve and perform a pressure test on it, and each unit test seat can slide and adjust the angle position individually along the annular guide rail, so as to align the interfaces of the tested valve with each other, thereby facilitating the simultaneous closing test of all interfaces of the valve with multiple interfaces.

Description

Technical Field

[0001] The invention relates to the technical field of valve detection, and in particular to an air tightness detection system for a valve. Background Art

[0002] Valves are one of the indispensable key components in industrial production and are widely used in many industries such as chemical, petroleum, natural gas, electricity, and pharmaceuticals. The main function of valves is to control the flow and direction of fluids, such as liquids or gases. Therefore, the sealing performance of valves directly affects the safety and efficiency of production, especially in some high-pressure, high-temperature or corrosive media environments. The air tightness of valves is even more important. The air tightness of valves is generally tested by connecting the valve to the corresponding testing equipment and applying a pressure higher than the working pressure to test the sealing and structural strength of the valve.

[0003] Traditional valve air tightness testing equipment is usually symmetrically arranged with two detection ports to connect the interfaces at both ends of the closed valve, and judge the sealing performance of the valve by pressurizing and testing the pressure changes on both sides. However, this equipment has certain limitations, especially for valves with multiple interfaces, such as three-way valves, four-way valves, etc. Traditional testing equipment can often only close the two main interfaces of the valve at the same time, while other unclosed interfaces require additional measures to seal. In this case, flange sealing covers are required to seal the additional interfaces before testing, and all interfaces cannot be connected, closed and tested at the same time, resulting in the need to adjust the valve position and interface multiple times, and the overall testing efficiency is low. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose a valve air tightness detection system to solve the problem that the current valve air tightness detection equipment can only close the two main interfaces of the valve at the same time, and for valves with multiple interfaces, all interfaces cannot be connected, closed and detected at the same time, and the position and interface of the valve need to be adjusted multiple times, resulting in low overall detection efficiency.

[0005] Based on the above purpose, the present invention provides a valve air tightness detection system, including a horizontal test frame and an annular test frame located above the horizontal test frame, and also includes: A unit test seat, wherein a plurality of unit test seats are arranged around the annular test frame, wherein the unit test seat is slidably connected to the annular test frame, a central guide groove is arranged in the middle of the unit test seat, and the axial center lines of all the central guide grooves intersect at the center point of the annular test frame; A test closing seat is slidably arranged on the inner side of the central guide groove, and a translation hydraulic push rod is connected to the outer side of the test closing seat, and the translation hydraulic push rod pushes the test closing seat to slide forward and backward along the central guide groove by telescoping; A detection connecting pipe is connected and arranged in the middle of the test closed seat, the front end of the detection connecting pipe is provided with a connecting opening, and the rear end of the detection connecting pipe is connected and arranged with a barometer, a regulating valve and a detection pressurized air pump in sequence; The elastic airbag is nested and surrounded on the outer side of the detection connecting tube, and the outer side of the elastic airbag is connected with a closed pressurized air pump.

[0006] Furthermore, an annular guide rail is arranged around the middle of the annular test frame, the unit test seat is slidably connected to the annular test frame through the annular guide rail, an adjusting gear ring is arranged around the middle of the annular guide rail, an adjusting motor is connected to the inner side of the unit test seat, an adjusting gear is connected to the shaft end of the adjusting motor, the adjusting gear and the adjusting gear ring are meshed with each other, and the adjusting motor drives the unit test seat to move around the center of the annular test frame along the annular guide rail through the adjusting gear and the adjusting gear ring.

[0007] Furthermore, a center sleeve is nested and slidably arranged on the outer side of the detection connecting tube, and a closed push plate is arranged around the outer side of the center sleeve. The closed push plate is slidably connected to the detection connecting tube through the center sleeve. The closed push plate is located on the rear side of the elastic airbag, and when the closed push plate moves along the detection connecting tube toward the side of the elastic airbag, it simultaneously pushes and squeezes the elastic airbag.

[0008] Furthermore, a sliding guide rod is connected to the back side of the closed push plate, a guide sleeve is connected to the outer side of the test closed seat, the closed push plate is slidably connected to the test closed seat through the sliding guide rod and the guide sleeve, and a hydraulic telescopic rod is connected to the outer side of the test closed seat, and the front and rear ends of the hydraulic telescopic rod are respectively interconnected with the closed push plate and the test closed seat.

[0009] Furthermore, an airbag mounting sleeve is provided between the elastic airbag and the detection connecting tube, the elastic airbag and the airbag mounting sleeve are fixedly connected, the inner side surface of the airbag mounting sleeve is surrounded by a nested thread, and the outer side surface of the detection connecting tube is surrounded by a connecting thread, the nested thread and the connecting thread are directly matched with each other, and the airbag mounting sleeve is detachably and closedly connected to the detection connecting tube via the nested thread and the connecting thread.

[0010] Furthermore, circular guide seats are symmetrically arranged on the front and rear sides of the annular test frame, and pneumatic telescopic rods are horizontally connected to the centers of the symmetrical circular guide seats on both sides. An inspection clamping seat is connected to one end of the pneumatic telescopic rod close to the annular test frame, and a pressure gauge is also arranged between the pneumatic telescopic rod and the inspection clamping seat. The pneumatic telescopic rod and the inspection clamping seat are connected to each other through the pressure gauge, and the pneumatic telescopic rods arranged on both sides respectively drive the corresponding inspection clamping seats to approach each other to clamp and fix the valve to be tested, and a connecting turntable is arranged at the bottom of the annular test frame, and the annular test frame is rotatably connected to the horizontal test frame through the connecting turntable.

[0011] Furthermore, a tool clamping head is provided in the middle connection of the detection clamping seat, a chimeric connection groove is provided on the front of the detection clamping seat, and a chimeric connection block is provided on the back of the tool clamping head. The chimeric connection groove and the chimeric connection block are arranged to cooperate with each other, and the tool clamping head is slidably and detachably connected to the detection clamping seat through the chimeric connection block and the chimeric connection groove.

[0012] Furthermore, a protective sealing cylinder is slidably nested on the outer side of the circular guide seat, a transparent window is provided in the middle of the protective sealing cylinder, a spacing sealing ring is provided between the circular guide seat and the protective sealing cylinder, a synchronous screw sleeve is connected to the outer side of the protective sealing cylinder, a translation screw is nested in the middle of the synchronous screw sleeve, a translation motor is connected to the axial end of the translation screw, and the translation motor drives the protective sealing cylinders symmetrically arranged on both sides to move synchronously and reversely through the translation screw and the synchronous screw sleeve, and the front and rear sides of the annular test frame are surrounded by embedded sealing grooves, and the sizes of the protective sealing cylinder and the embedded sealing grooves match each other.

[0013] Furthermore, the outer end of the regulating valve is connected to a connecting air pipe, and the outer end of the connecting air pipe is connected to a pressurized gas storage tank. All regulating valves are interconnected with the pressurized gas storage tank via the connecting air pipe, the detection pressurized air pump is interconnected with the bottom of the pressurized gas storage tank, the detection connecting pipe is interconnected with the top of the pressurized gas storage tank, and the top of the pressurized gas storage tank is also connected to a gas filling port. A spacer piston is nested and slidably provided on the inner side of the pressurized gas storage tank, and the spacer piston divides the internal partition of the pressurized gas storage tank into an upper and lower part. The pressurized gas storage tank is located on the upper side of the spacer piston to store nitric oxide.

[0014] Furthermore, a plurality of laser emitters and laser receivers are evenly arranged in the middle of a vertical plane on one side of the circular guide seat close to the annular test frame, and the laser emitters and the laser receivers are arranged in a one-to-one correspondence.

[0015] Beneficial effects of the present invention: It can be seen from the above that the present invention provides an air tightness detection system for a valve, which drives the test sealing seat to move by translating the hydraulic push rod so that the test sealing seat and the interface of the valve are connected to each other. At this time, the detection connecting pipe in the middle of the test sealing seat is located at the interface of the valve, and an elastic airbag is arranged around the outer side of the detection connecting pipe. The elastic airbag can be inflated to close the corresponding valve interface. At the same time, the inflatable elastic airbag serves as a sealing structure of the valve interface, which is convenient for adapting to valve interfaces of different sizes and shapes, and is more convenient and quick during sealing connection and loading and unloading. The detection connecting pipe is connected to the pressurized gas storage tank through the adjusting valve and the connecting gas pipe. The air pump delivers pressurized gas to the pressurized gas storage tank, and further delivers it to the detection connecting pipe through the adjusting valve and the connecting air pipe, and then delivers it to the interface of the valve through the detection connecting pipe, thereby pressurizing the interface of the valve, and the air tightness of the valve can be tested by reading the corresponding value of the barometer. Since a plurality of unit test seats are arranged around the annular guide rail of the system, each unit test seat can individually close the interface of a valve and perform a pressure test on it, and each unit test seat can slide and adjust the angular position along the annular guide rail individually to facilitate the mutual alignment of the interfaces of the tested valves, thereby facilitating the simultaneous closing test of all interfaces of valves with multiple interfaces, which is more flexible and convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the front structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the rear structure of an embodiment of the present invention; Figure 3 It is a structural schematic diagram of a horizontal test stand according to an embodiment of the present invention; Figure 4 It is a structural schematic diagram of a horizontal test stand in a rotating state according to an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a horizontal test stand according to an embodiment of the present invention; Figure 6 A schematic diagram of the structure of an annular guide rail according to an embodiment of the present invention; Figure 7 A schematic diagram of the structure of a unit test socket according to an embodiment of the present invention; Figure 8 It is a structural schematic diagram of a test enclosure according to an embodiment of the present invention; Fig. 9 A schematic structural diagram of a circular guide seat according to an embodiment of the present invention; Fig.10 Schematic diagram of the structure of a pressurized gas storage tank according to an embodiment of the present invention.

[0018] The markings in the figure are: 1. Horizontal test frame; 101. Connecting turntable; 102. Annular test frame; 103. Engagement sealing groove; 104. Annular guide rail; 105. Adjustment gear ring; 2. Unit test seat; 201. Center guide groove; 202. Translation hydraulic push rod; 203. Adjustment motor; 204. Adjustment gear; 3. Test closure seat; 301. Guide sleeve; 302. Connecting gas pipe; 303. Pressurized gas storage tank; 304. Interval piston; 305. Detection pressurized air pump; 306. Gas filling port; 4. Detection connecting pipe; 401. Barometer; 402. Connecting thread; 403. Connecting opening; 404. Adjustment valve; 5. Elastic airbag; 501. Airbag installation sleeve; 502. Nesting Thread; 503, closed pressurized air pump; 504, closed push plate; 505, center sleeve; 506, sliding guide rod; 507, hydraulic telescopic rod; 6, circular guide seat; 601, spacer sealing ring; 602, translation screw; 603, translation motor; 604, laser transmitter; 605, laser receiver; 7, pneumatic telescopic rod; 701, detection clamping seat; 702, interlocking connection groove; 703, pressure gauge; 704, tooling clamping head; 705, interlocking connection block; 8, protective sealing cylinder; 801, transparent window; 802, synchronous screw sleeve; 803, ventilation valve; 9, treatment water tank; 901, exhaust treatment pipe; 902, exhaust fan; 903, exhaust pipe. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0020] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 As shown, a valve air tightness detection system includes a horizontal test frame 1 and an annular test frame 102 located above the horizontal test frame 1, and also includes: A unit test seat 2, a plurality of unit test seats 2 are arranged around the annular test frame 102, the unit test seat 2 is slidably connected to the annular test frame 102, a central guide groove 201 is arranged in the middle of the unit test seat 2, and the axial center lines of all the central guide grooves 201 intersect at the center point of the annular test frame 102; The test closed seat 3 is slidably arranged on the inner side of the central guide groove 201, and a translation hydraulic push rod 202 is connected to the outer side of the test closed seat 3. The translation hydraulic push rod 202 pushes the test closed seat 3 to slide forward and backward along the central guide groove 201 by telescoping; The detection connecting pipe 4 is connected and arranged in the middle of the test closed seat 3. The front end of the detection connecting pipe 4 is provided with a connecting opening 403. The rear end of the detection connecting pipe 4 is connected and arranged with a barometer 401, a regulating valve 404 and a detection pressurized air pump 305 in sequence. The elastic airbag 5 is nested and arranged around the outer side of the detection connecting pipe 4, and the outer side of the elastic airbag 5 is connected to a closed pressurized air pump 503.

[0022] In the present embodiment, each unit test seat 2 of the system is independently provided with a test closing seat 3, and the translation hydraulic push rod 202 can drive the test closing seat 3 to move so that the test closing seat 3 and the valve interface are interconnected. At this time, the detection connecting pipe 4 in the middle of the test closing seat 3 is located at the valve interface, and an elastic airbag 5 is arranged around the outer side of the detection connecting pipe 4. The elastic airbag 5 is interconnected with the closed pressurized air pump 503 through a flexible pipeline. The closed pressurized air pump 503 can inflate the elastic airbag 5 at this time, so that the elastic airbag 5 expands as a whole to close the corresponding valve interface. The inflatable elastic airbag 5 is used as the sealing structure of the valve interface, which can adapt to valve interfaces of different sizes and shapes, inflate when connected and sealed, and deflate when disassembled and opened, so that the sealed connection and loading and unloading are more convenient and quick, and the detection connecting pipe 4 is adjusted by the valve 4 04 is interconnected with the detection pressurized air pump 305, and the pressurized gas is delivered to the detection connecting pipe 4 through the detection pressurized air pump 305, so as to be delivered to the interface of the valve through the detection connecting pipe 4, thereby pressurizing the interface of the valve. By adjusting the valve 404, the corresponding detection connecting pipe 4 can be controlled to be pressurized. At the same time, the corresponding barometer 401 can detect the pressure difference and the numerical change of the numerical detection to detect the air tightness of the valve. Since a plurality of unit test seats 2 are arranged around the annular guide rail 104 of the system, each unit test seat 2 can individually close the interface of a valve and perform a pressure test on it, and each unit test seat 2 can slide and adjust the angle position along the annular test frame 102 individually to facilitate the mutual alignment of the interfaces of the tested valves, thereby facilitating the simultaneous closing test of all interfaces of valves with multiple interfaces, which is more flexible and convenient to use.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10As shown, preferably, a circular guide rail 104 is arranged around the middle of the annular test frame 102 of the system, and the unit test seat 2 is slidably connected to the annular test frame 102 through the annular guide rail 104. A plurality of unit test seats 2 are arranged around the annular guide rail 104, and each unit test seat 2 can individually close the interface of a valve and perform a pressure test on it, and the unit test seat 2 is slidably connected along the annular guide rail 104. Since the interfaces of valves with multiple interfaces are often projected outward from the same center point of the valve, that is, the valve core, and an adjusting gear is arranged around the middle of the annular guide rail 104. Ring 105, the inner side of the unit test seat 2 is connected with an adjusting motor 203, the axial end of the adjusting motor 203 is connected with an adjusting gear 204, the adjusting gear 204 and the adjusting gear ring 105 are meshed and connected with each other, the adjusting motor 203 drives the unit test seat 2 to move around the center of the annular test frame 102 along the annular guide rail 104 through the adjusting gear 204 and the adjusting gear ring 105, so that the unit test seat 2 can adjust the angle position and align with the interface of the valve under test, so as to facilitate the closed test of all interfaces of the valve with multiple interfaces at the same time, which is more flexible and convenient to use.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, preferably, the system uses an inflatable elastic airbag 5 as a sealing structure of the valve interface to adapt to valve interfaces of different sizes and shapes. It is inflated when connected and sealed, and deflated when disassembled and opened. At the same time, a central sleeve 505 is nested and slidably arranged on the outer side of the detection connecting pipe 4, and a closed push plate 504 is arranged around the outer side of the central sleeve 505. The closed push plate 504 is slidably connected to the detection connecting pipe 4 through the central sleeve 505. The closed push plate 504 is located at the rear side of the elastic airbag 5, and the back side of the closed push plate 504 is connected with a sliding guide rod 506. The outer side of the test closing seat 3 is connected A guide sleeve 301 is provided, and a closed push plate 504 is slidably connected to the test closed seat 3 through a sliding guide rod 506 and a guide sleeve 301. A hydraulic telescopic rod 507 is provided on the outer side of the test closed seat 3. The front and rear ends of the hydraulic telescopic rod 507 are respectively connected to the closed push plate 504 and the test closed seat 3. The closed push plate 504 can be driven to move along the detection connecting pipe 4 through the hydraulic telescopic rod 507. When the closed push plate 504 moves along the detection connecting pipe 4 to the side of the elastic airbag 5, it simultaneously pushes and squeezes the elastic airbag 5, thereby further improving the sealing performance of the elastic airbag 5 when closing the valve interface.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, preferably, an airbag mounting sleeve 501 is further provided between the elastic airbag 5 and the detection connecting tube 4 of the system, and the elastic airbag 5 and the airbag mounting sleeve 501 are fixedly connected, and the inner side surface of the airbag mounting sleeve 501 is surrounded by a nested thread 502, and the outer side surface of the detection connecting tube 4 is surrounded by a connecting thread 402, and the nested thread 502 and the connecting thread 402 are directly matched with each other, and the airbag mounting sleeve 501 is detachably and closedly connected to the detection connecting tube 4 through the nested thread 502 and the connecting thread 402, so that when the elastic airbag 5 is damaged, it is convenient to quickly replace the elastic airbag 5, and at the same time, the front and rear positions of the elastic airbag 5 and the detection connecting tube 4 can be adjusted by rotating the airbag mounting sleeve 501, so as to be used in conjunction with different valve interfaces, which is more convenient and quick to use.

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10As shown, preferably, circular guide seats 6 are symmetrically arranged on the front and rear sides of the annular test frame 102 of the system, and pneumatic telescopic rods 7 are horizontally connected to the centers of the circular guide seats 6 symmetrically arranged on both sides. An end of the pneumatic telescopic rod 7 close to the annular test frame 102 is connected to a detection clamping seat 701, and a pressure gauge 703 is also arranged between the pneumatic telescopic rod 7 and the detection clamping seat 701. The pneumatic telescopic rod 7 and the detection clamping seat 701 are connected to each other through the pressure gauge 703, so that before the test, the pneumatic telescopic rods 7 arranged on both sides respectively drive the corresponding detection clamping seats 701 to approach each other to clamp and fix the valve to be tested, which is convenient for fixing and loading and unloading the valve. At the same time, a connecting turntable 101 is arranged at the bottom of the annular test frame 102, and the annular test frame 102 is connected to the water through the connecting turntable 101. The flat test frame 1 is rotatably connected, so that when the valve is fixedly loaded and unloaded before and after the test, the annular test frame 102 can be deflected at a certain angle by connecting the turntable 101, so as to make way for the side position, making it more convenient and quick to load and unload the valve. At the same time, the middle connection of the detection clamping seat 701 is provided with a tool clamping head 704, the front of the detection clamping seat 701 is provided with an interlocking connection groove 702, and the back of the tool clamping head 704 is provided with an interlocking connection block 705, and the interlocking connection groove 702 and the interlocking connection block 705 are arranged in coordination with each other. The tool clamping head 704 is slidably and detachably connected to the detection clamping seat 701 through the interlocking connection block 705 and the interlocking connection groove 702, so as to facilitate the rapid replacement of different tool clamping heads 704 to clamp the corresponding matching valves, which is beneficial to improving the overall operation detection efficiency.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10As shown, preferably, a protective sealing cylinder 8 is nested and slidably arranged on the outer side of the circular guide seat 6 of the system, a transparent window 801 is arranged in the middle of the protective sealing cylinder 8, and a spacing sealing ring 601 is arranged between the circular guide seat 6 and the protective sealing cylinder 8 to facilitate maintaining the sealing between the circular guide seat and the protective sealing cylinder 8, and a synchronous screw sleeve 802 is connected to the outer side of the protective sealing cylinder 8, and a translation screw 602 is nested and connected in the middle of the synchronous screw sleeve 802, and a translation motor 603 is connected to the axial end of the translation screw 602, and the translation motor 603 is connected to the translation screw 602 and the synchronous screw sleeve 802. The step screw sleeve 802 drives the protective sealing cylinder 8 symmetrically arranged on both sides to move synchronously in the opposite direction. The front and rear sides of the annular test frame 102 are surrounded by the embedded sealing groove 103, so that the protective sealing cylinder 8 symmetrically arranged on both sides can be moved to the annular test frame 102 and embedded in the embedded sealing groove 103. The sizes of the protective sealing cylinder 8 and the embedded sealing groove 103 match each other, so that the valve to be tested is completely enclosed inside by the protective sealing cylinder 8, which provides certain protection and sealing for the detection, stabilizes the internal detection environment, and is conducive to improving the safety and accuracy of the detection.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10As shown, preferably, the outer end of the regulating valve 404 of the system is connected to a connecting gas pipe 302, and the outer end of the connecting gas pipe 302 is connected to a pressurized gas tank 303, and all the regulating valves 404 are interconnected with the pressurized gas tank 303 through the connecting gas pipe 302, so that the detection connecting pipe 4 is interconnected with the pressurized gas tank 303 through the regulating valve 404 and the connecting gas pipe 302 of the flexible structure, and the pressurized gas is delivered to the pressurized gas tank 303 through the detection pressurized air pump 305, and is further delivered to the detection connecting pipe 4 through the regulating valve 404 and the connecting gas pipe 302, so as to be delivered to the interface of the valve through the detection connecting pipe 4, thereby pressurizing the interface of the valve, and the detection pressurized air pump 305 and the pressurized gas are connected to the connecting gas pipe 302. The bottoms of the tanks 303 are connected to each other, the detection connecting pipe 4 is connected to the top of the pressurized gas storage tank 303, and the top of the pressurized gas storage tank 303 is also connected to a gas filling port 306. The inner side of the pressurized gas storage tank 303 is nested and slidably provided with a spacing piston 304, and the spacing piston 304 divides the internal partition of the pressurized gas storage tank 303 into two parts, an upper part, and an upper part of the pressurized gas storage tank 303 is located to store nitric oxide. When the detection pressurized air pump 305 pressurizes the inside of the pressurized gas storage tank 303, it will push the spacing piston 304, and the nitric oxide stored on the upper side will be transported to the corresponding detection connecting pipe 4 through the spacing piston 304 for pressurized testing. When the tested valve leaks, the pressurized nitric oxide will be transported to the corresponding detection connecting pipe 4 for pressurized testing. The nitrogen monoxide will leak to the outside of the tested valve, come into contact with the air outside, and react with the oxygen therein to produce reddish-brown nitrogen dioxide, so as to quickly determine whether the tested valve is leaking and the corresponding leakage point. At the same time, the closed test space formed by the protective sealing tube 8 can prevent the leakage of nitric oxide and nitrogen dioxide. In addition, a plurality of laser transmitters 604 and laser receivers 605 are evenly arranged in the middle of the vertical plane on one side of the circular guide seat 6 close to the annular test frame 102. The laser transmitters 604 and the laser receivers 605 are arranged one by one. During the test, the laser transmitter 604 emits laser to the laser receiver 605. When the valve leaks and produces reddish-brown nitrogen dioxide, it will cause the corresponding The laser emitted by the laser transmitter 604 is blocked and scattered, and then the laser intensity received by the corresponding laser receiver 605 will be reduced. By detecting the change in the laser value of the laser receiver 605 at the corresponding position, it is possible to more accurately determine whether the valve under test is leaking and the corresponding leakage point, and the detection is more accurate and convenient. At the same time, an exhaust treatment pipe 901 is also installed in the middle of the circular guide seat 6. The opening of one end of the exhaust treatment pipe 901 is located on a vertical plane on one side of the circular guide seat 6 close to the annular test frame 102. The other end of the exhaust treatment pipe 901 is connected to a treatment water tank 9. The opening of the other end of the exhaust treatment pipe 901 is located at the bottom of the treatment water tank 9. The middle of the exhaust treatment pipe 901 is connected to an exhaust fan 902.The top of the treatment water tank 9 is connected with an exhaust gas discharge pipe 903, so that after the detection is completed, the exhaust fan 902 can transport the gas inside the protective sealing tube 8 to the treatment water tank 9 through the exhaust treatment pipe 901, and draw in the outside air through the ventilation valve 803 installed in the middle of the protective sealing tube 8 for ventilation. Since nitrogen dioxide is easily soluble in water, after the gas is transported to the treatment water tank 9 and contacts with water, the nitrogen dioxide therein is separated and removed, and the remaining air is discharged from the exhaust gas discharge pipe 903, making the overall operation safer during detection.

[0029] When in use, first connect the corresponding pipelines of the system, then place the valve to be tested at the center of the annular test frame 102, and then the pneumatic telescopic rods 7 on both sides respectively drive the corresponding test clamping seats 701 to approach each other to clamp and fix the valve to be tested, and then the translation motor 603 drives the protective sealing tubes 8 symmetrically arranged on both sides to move synchronously in the opposite direction through the translation screw 602 and the synchronous screw sleeve 802, so that the protective sealing tubes 8 symmetrically arranged on both sides are moved to the annular test frame 102 and embedded in the embedded sealing groove 103, and the valve to be tested is completely enclosed inside by the protective sealing tube 8, and then the adjustment motor 203 drives the unit test seat 2 along the annular guide rail 104 around the center of the annular test frame 102 through the adjustment gear 204 and the adjustment gear ring 105. The test valve 302 is moved around the valve body 304 to adjust the angle position of the unit test seat 2 to align with the interface of the tested valve, and then the hydraulic push rod 202 is translated to drive the test closing seat 3 to move toward the valve interface, so that the connecting air pipe 302 and the elastic airbag 5 are connected to the valve interface, and then the closed pressurized air pump 503 inflates the elastic airbag 5 to expand the elastic airbag 5 as a whole to close the corresponding valve interface. At the same time, the hydraulic telescopic rod 507 drives the closed push plate 504 to move along the detection connecting pipe 4, so that the closed push plate 504 moves along the detection connecting pipe 4 to one side of the elastic airbag 5, and simultaneously pushes and squeezes the elastic airbag 5 to further improve the sealing performance of the elastic airbag 5 when closing the valve interface. Then, when the detection pressurized air pump 305 pressurizes the air into the pressurized air storage tank 303, it will push the closed push plate 504 to move along the detection connecting pipe 4. The piston 304 is separated, and the nitric oxide stored on the upper side is transported to the corresponding detection connecting pipe 4 through the piston 304 for pressurized testing. When the tested valve leaks, the pressurized nitric oxide will leak to the outside of the tested valve, contact with the air outside, and react with the oxygen therein to produce reddish-brown nitrogen dioxide, so as to quickly determine whether the tested valve is leaking and the corresponding leakage point. At the same time, when the valve leaks and produces reddish-brown nitrogen dioxide, relative to the completely transparent air, the laser emitted by the corresponding laser transmitter 604 will be blocked and scattered, and then the laser intensity received by the corresponding laser receiver 605 will be reduced. By detecting the change in the laser value of the laser receiver 605 at the corresponding position, a more accurate judgment can be made. Whether the valve under test is leaking and the corresponding leakage point can be determined by adjusting the valve 404 to control the opening and closing of the corresponding detection connecting pipe 4, so that the various interfaces of the valve can be tested at the same time or in this way. After the detection is completed, the pressure pump 305 is tested to evacuate air, and drive the interval piston 304 to move downward, and the nitric oxide is drawn back to the pressurized gas storage tank 303. At the same time, the exhaust fan 902 can transport the gas inside the protective sealing tube 8 to the treatment water tank 9 through the exhaust treatment pipe 901, and draw in the outside air through the ventilation valve 803 installed in the middle of the protective sealing tube 8 for ventilation. After the gas is transported to the treatment water tank 9 and contacts with water, the nitrogen dioxide therein is separated and removed, and the remaining air is discharged from the exhaust pipe 903, thereby completing the air tightness detection of the valve.

[0030] The air tightness detection system of the valve provided by the present invention drives the test sealing seat 3 to move by translating the hydraulic push rod 202 so that the test sealing seat 3 and the interface of the valve are connected to each other. At this time, the detection connecting pipe 4 in the middle of the test sealing seat 3 is located at the interface of the valve, and an elastic air bag 5 is arranged around the outer side of the detection connecting pipe 4. The elastic air bag 5 can be inflated to close the corresponding valve interface. At the same time, the inflatable elastic air bag 5 serves as a sealing structure of the valve interface, which is convenient for adapting to valve interfaces of different sizes and shapes, and is more convenient and quick during sealing connection and loading and unloading. The detection connecting pipe 4 is connected to the pressurized gas storage tank 303 through the adjusting valve 404 and the connecting gas pipe 302, and the pressurized gas storage tank 3 is pressed by the detection pressurized air pump 305. 03 delivers pressurized gas, and further delivers it to the detection connecting pipe 4 through the regulating valve 404 and the connecting gas pipe 302, so as to deliver it to the interface of the valve through the detection connecting pipe 4, thereby pressurizing the interface of the valve, and the air tightness of the valve can be tested by the corresponding value of the barometer 401. Since a plurality of unit test seats 2 are arranged around the annular guide rail 104 of the system, each unit test seat 2 can individually close the interface of a valve and perform a pressure test on it, and each unit test seat 2 can slide and adjust the angle position along the annular guide rail 104 individually to facilitate the mutual alignment of the interfaces of the tested valves, thereby facilitating the simultaneous closing test of all interfaces of valves with multiple interfaces, which is more flexible and convenient to use.

[0031] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A valve air tightness detection system, comprising a horizontal test frame (1) and an annular test frame (102) located above the horizontal test frame (1), characterized in that: Also includes: A unit test seat (2), wherein a plurality of unit test seats (2) are arranged around an annular test frame (102), the unit test seat (2) and the annular test frame (102) are slidably connected, a center guide groove (201) is arranged in the middle of the unit test seat (2), and the axial center lines of all the center guide grooves (201) intersect at the center point of the annular test frame (102); A test closing seat (3) is slidably mounted on the inner side of the central guide groove (201), and a translation hydraulic push rod (202) is connected to the outer side of the test closing seat (3). The translation hydraulic push rod (202) pushes the test closing seat (3) to slide forward and backward along the central guide groove (201) by telescoping. A detection connecting pipe (4) is connected and arranged in the middle of the test sealing seat (3), the front end of the detection connecting pipe (4) is provided with a connecting opening (403), and the rear end of the detection connecting pipe (4) is connected and arranged in sequence with a barometer (401), a regulating valve (404) and a detection pressurized air pump (305); The elastic airbag (5) is nested and arranged around the outer side of the detection connecting tube (4), and the outer side of the elastic airbag (5) is connected to a closed pressurized air pump (503).

2. The air tightness detection system for valves according to claim 1, characterized in that: An annular guide rail (104) is arranged around the middle of the annular test frame (102); the unit test seat (2) is slidably connected to the annular test frame (102) through the annular guide rail (104); an adjusting gear ring (105) is arranged around the middle of the annular guide rail (104); an adjusting motor (203) is connected to the inner side of the unit test seat (2); an adjusting gear (204) is connected to the shaft end of the adjusting motor (203); the adjusting gear (204) and the adjusting gear ring (105) are meshed with each other; the adjusting motor (203) drives the unit test seat (2) to move around the center of the annular test frame (102) along the annular guide rail (104) through the adjusting gear (204) and the adjusting gear ring (105).

3. The air tightness detection system for valves according to claim 1, characterized in that: A central sliding sleeve (505) is nested and slidably arranged on the outer side of the detection connecting tube (4), and a closed push plate (504) is arranged around the outer side of the central sliding sleeve (505). The closed push plate (504) is slidably connected to the detection connecting tube (4) through the central sliding sleeve (505). The closed push plate (504) is located at the rear side of the elastic airbag (5). When the closed push plate (504) moves along the detection connecting tube (4) toward the side of the elastic airbag (5), it simultaneously pushes and squeezes the elastic airbag (5).

4. The air tightness detection system for valves according to claim 3, characterized in that: The back side of the closed push plate (504) is connected with a sliding guide rod (506), the outer side of the test closed seat (3) is connected with a guide sleeve (301), the closed push plate (504) is slidably connected with the test closed seat (3) through the sliding guide rod (506) and the guide sleeve (301), the outer side of the test closed seat (3) is connected with a hydraulic telescopic rod (507), and the front and rear ends of the hydraulic telescopic rod (507) are respectively connected to the closed push plate (504) and the test closed seat (3).

5. The valve air tightness detection system according to claim 1, characterized in that: An airbag installation sleeve (501) is also provided between the elastic airbag (5) and the detection connecting tube (4). The elastic airbag (5) and the airbag installation sleeve (501) are fixedly connected. The inner side surface of the airbag installation sleeve (501) is surrounded by a nested thread (502). The outer side surface of the detection connecting tube (4) is surrounded by a connecting thread (402). The nested thread (502) and the connecting thread (402) are directly matched with each other. The airbag installation sleeve (501) is detachably and closedly connected to the detection connecting tube (4) via the nested thread (502) and the connecting thread (402).

6. The air tightness detection system for valves according to claim 1, characterized in that: Circular guide seats (6) are symmetrically arranged at intervals on the front and rear sides of the annular test frame (102); a pneumatic telescopic rod (7) is horizontally connected to the center of the symmetrically arranged circular guide seats (6) on both sides; a detection clamping seat (701) is connected to one end of the pneumatic telescopic rod (7) close to the annular test frame (102); a pressure gauge (703) is further arranged between the pneumatic telescopic rod (7) and the detection clamping seat (701); the pneumatic telescopic rod (7) and the detection clamping seat (701) are connected to each other via the pressure gauge (703); the pneumatic telescopic rods (7) arranged on both sides respectively drive the corresponding detection clamping seats (701) to approach each other so as to clamp and fix the valve to be tested; a connecting turntable (101) is arranged at the bottom of the annular test frame (102); the annular test frame (102) is rotatably connected to the horizontal test frame (1) via the connecting turntable (101).

7. The air tightness detection system for valves according to claim 6, characterized in that: A tool clamping head (704) is provided in the middle of the detection clamping seat (701); a chimeric connection groove (702) is provided on the front of the detection clamping seat (701); a chimeric connection block (705) is provided on the back of the tool clamping head (704); the chimeric connection groove (702) and the chimeric connection block (705) are arranged to cooperate with each other; the tool clamping head (704) is slidably and detachably connected to the detection clamping seat (701) via the chimeric connection block (705) and the chimeric connection groove (702).

8. The air tightness detection system for valves according to claim 7, characterized in that: A protective sealing cylinder (8) is slidably nested on the outer side of the circular guide seat (6), a transparent window (801) is arranged in the middle of the protective sealing cylinder (8), a spacer sealing ring (601) is arranged between the circular guide seat (6) and the protective sealing cylinder (8), a synchronous screw sleeve (802) is connected to the outer side of the protective sealing cylinder (8), a translation screw (602) is nested in the middle of the synchronous screw sleeve (802), and a translation motor (603) is connected to the axial end of the translation screw (602). The translation motor (603) drives the protective sealing cylinders (8) symmetrically arranged on both sides to move synchronously in opposite directions through the translation screw (602) and the synchronous screw sleeve (802), and the front and rear sides of the annular test frame (102) are surrounded by embedded sealing grooves (103), and the dimensions of the protective sealing cylinder (8) and the embedded sealing grooves (103) are matched with each other.

9. The air tightness detection system for valves according to claim 1, characterized in that: The outer end of the regulating valve (404) is connected to a connecting gas pipe (302), and the outer end of the connecting gas pipe (302) is connected to a pressurized gas storage tank (303). All regulating valves (404) are interconnected with the pressurized gas storage tank (303) through the connecting gas pipe (302). The detection pressurized air pump (305) is interconnected with the bottom of the pressurized gas storage tank (303), and the detection connecting pipe (4) is interconnected with the top of the pressurized gas storage tank (303). The top of the pressurized gas storage tank (303) is also connected to a gas filling port (306). The inner side of the pressurized gas storage tank (303) is nested and slidably provided with a spacing piston (304), and the spacing piston (304) divides the internal space of the pressurized gas storage tank (303) into an upper and lower part. The pressurized gas storage tank (303) is located on the upper side of the spacing piston (304) and stores nitric oxide.

10. The air tightness detection system for valves according to claim 6, characterized in that: A plurality of laser emitters (604) and laser receivers (605) are evenly arranged in the middle of a vertical plane on one side of the circular guide seat (6) close to the annular test frame (102), and the laser emitters (604) and the laser receivers (605) are arranged in a one-to-one correspondence.

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