A valve sealing performance detector and its detection method

Abstract

The present invention relates to the technical field of valve seal detection, and particularly relates to a valve sealing detection machine and a detection method thereof, which comprise a machine body, a detection pool, a nozzle structure and a gas source assembly. The sealing detection machine of the present invention further comprises a first driving mechanism and a second driving mechanism arranged on the machine body; wherein, the nozzle structure is arranged on the second driving mechanism and can be controlled by the second driving mechanism to approach or move away from each other and fix the valve body from both ends of the valve port of the valve body; the second driving mechanism is arranged on the first driving mechanism and can be controlled by the first driving mechanism to lift and enter or leave the detection pool; the gas source assembly is composed of a suction gas source and a supply gas source and can pump air or inflate the valve body through the nozzle structure; the nozzle structure has a limiting end, and when the nozzle structure fixes the valve body at both ends, the limiting end can form an isolation cavity in the valve cavity that is cut off from the gas source assembly; the present invention can use air inflation and air extraction to detect the valve to ensure the detection effect.

Description

Technical Field

[0001] The present invention relates to the technical field of valve sealing detection, and in particular to a valve sealing detection machine and a detection method thereof. Background Art

[0002] Valves are pipeline accessories that open and close pipelines, control flow direction, and regulate and control the transported medium. At present, according to the function of the valve, it can generally be divided into shut-off valves, check valves and regulating valves.

[0003] However, since valves are important control components in fluid delivery systems, valve sealing testing is essential during the valve production process. Valve sealing testing mainly detects defects such as damage and cracks on the inner wall of the valve body that affect the sealing of the valve body. Nowadays, valve sealing testing is mainly completed with the help of sealing testing machines, such as a sealing testing device for valve production disclosed in the authorization announcement number CN117168707B.

[0004] Still taking the above patent as an example, when the sealing machine is testing the invention, the valve needs to be fixed. Nowadays, the valve is mainly fixed by clamping the valve body itself. However, after clamping, the clamping mechanism contacts the surface of the valve body. Therefore, if there is a crack in the part where the valve body and the clamping mechanism contact, it will not be detected smoothly and is not easy to observe, so it will affect the test results.

[0005] Second, currently when testing the sealing performance of valves, the valve ports at both ends of the valve are mainly sealed. When the valve is immersed in a test pool, air is inflated into the valve to determine the sealing performance of the valve by observing whether bubbles are generated in the test pool. However, such a testing method is relatively simple, and some cracks cannot be detected by inflating air into the valve (hereinafter referred to as: inflation testing method). Therefore, there are loopholes in the test results.

[0006] Third, when using the inflation detection method, the entire valve cavity needs to be filled before the detection results can be observed. However, for some valves with larger valve cavities, the inflation process will be prolonged, thus affecting the efficiency of the detection.

[0007] Fourth, since the valve body needs to be immersed in the detection pool during the detection process, the impurities in the detection pool will gradually increase over time, thus affecting the observation effect.

[0008] In summary, it is necessary to make necessary improvements to the existing valve sealing detection machine. Summary of the invention

[0009] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a valve sealing detection machine and a detection method thereof, aiming to solve the problems arising from the above-mentioned background technology.

[0010] The technical solution of the present invention is realized as follows: A valve sealing detection machine, comprising:

[0011] A machine body having a detection pool;

[0012] An inflation mechanism provided on the machine body and composed of a nozzle structure and a gas source assembly, characterized in that: it further includes a first driving mechanism and a second driving mechanism provided on the machine body;

[0013] Wherein, the nozzle structure is provided on the second driving mechanism and can be controlled by the second driving mechanism to approach or move away from each other and fix the valve body from both ends of the valve body;

[0014] The second driving mechanism is provided on the first driving mechanism and can be controlled by the first driving mechanism to lift into or out of the detection pool;

[0015] The gas source assembly is composed of a suction gas source and a supply gas source and can evacuate or inflate the valve body through the nozzle structure;

[0016] The nozzle structure has a limiting end. When the nozzle structure fixes the valve body at both ends, the limiting end can form an isolation chamber in the valve cavity that is cut off from the gas source assembly.

[0017] Preferably: The first driving mechanism includes:

[0018] A plurality of first sprockets rotatably connected to one side of the inner wall of the machine body and circumferentially equidistantly spaced;

[0019] A plurality of second sprockets rotatably connected to the other side of the inner wall of the machine body and circumferentially equidistantly spaced;

[0020] A transmission chain composed of a first chain drivingly connected between the first sprockets and a second chain drivingly connected between the second sprockets;

[0021] Wherein, any of the first sprockets and / or the second sprockets can be controlled by the motor to rotate clockwise or counterclockwise.

[0022] Preferably: The second driving mechanism includes:

[0023] An installation table provided between the first chain and the second chain;

[0024] A chute provided on the installation table and longitudinally penetrating the installation table;

[0025] A driving gear rotatably connected to the installation table;

[0026] A driving rack composed of a first rack and a second rack slidably connected to the installation table and meshing with the driving gear;

[0027] The sliding seat is slidably connected to the mounting table and is connected to the first rack or the second rack through a limiting block that moves in the sliding groove.

[0028] Preferably, there are at least two air nozzle structures on each mounting table, and each air nozzle structure includes:

[0029] A clamping body is installed on one side of the sliding seat;

[0030] An installation cavity is recessed from one end of the clamping body;

[0031] A pressing body is fixed in the installation cavity and has an air inlet nozzle and an air extraction nozzle;

[0032] An adsorption cavity is formed on the clamping body, communicates with the air extraction nozzle, and an adsorption port communicating with the adsorption cavity is formed at one end of the clamping body;

[0033] A limiting cavity is recessed on the pressing body and communicates with the air extraction nozzle;

[0034] An activity cavity is arranged on the pressing body, and both ends penetrate through the pressing body and communicate with the air inlet nozzle;

[0035] A folding body has a folding cavity and is connected to the limiting cavity through a limiting tube;

[0036] An activity tube is connected to the cavity wall of the folding cavity, passes through the activity cavity, and has a communication port that can communicate with the folding cavity or the air inlet nozzle;

[0037] A spring is installed between the folding body and the cavity wall of the installation cavity;

[0038] An electromagnet is arranged on the clamping body and attracts the folding body to gradually unfold towards the electromagnet when energized;

[0039] Wherein, when the folding body unfolds, the valve body communicates with the air extraction nozzle through an air extraction branch formed by the activity tube, the communication port, the folding cavity, the limiting tube and the limiting cavity;

[0040] When the folding body contracts, the valve body communicates with the air inlet nozzle through a gas supply branch formed by the activity tube and the communication port;

[0041] The cross-section of the activity tube is semi-circular ring-shaped and air outlet holes are formed on the outer wall, and the limiting end of the air nozzle structure is formed.

[0042] Preferably, it further includes a water circulation component arranged on the machine body and capable of being controlled by a first driving mechanism. Among them, the water circulation component includes:

[0043] A filter body is installed in the detection pool and has a filter cavity;

[0044] A suction body moves in the filter cavity and divides the filter cavity into a first cavity and a second cavity;

[0045] The filter screen is composed of a first filter screen disposed in the first chamber and a second filter screen disposed in the second chamber. The first filter screen and the second filter screen respectively divide the first chamber and the second chamber into an outer chamber and an inner chamber;

[0046] The liquid inlet nozzle is disposed on the filter body and is communicated with the outer chamber;

[0047] The liquid outlet nozzle is disposed on the filter body and is communicated with the inner chamber;

[0048] Wherein, piston shafts extend respectively on both sides of the suction body, and a driving plate connected to each piston shaft is provided between the first chain and the second chain;

[0049] A liquid discharging body is further installed between the first chain and the second chain. The liquid discharging body is communicated with the liquid outlet nozzle through a drain pipe and is located at the top of the detection pool. A plurality of liquid discharge ports are provided on the liquid discharging body.

[0050] Preferably: A sewage pipe communicated with the outer chamber is provided on the machine body, and a sewage valve is provided on the sewage pipe.

[0051] Preferably: The clamping body is rotatably installed on the sliding seat through a rotating shaft. A liquid spraying structure capable of driving the clamping body to rotate is further provided on the sliding seat. Among them, the liquid spraying structure includes:

[0052] A liquid spraying body is connected to the sliding seat through a support shaft;

[0053] A liquid spraying chamber and an air flow chamber are formed in the liquid spraying body at intervals, and a one-way valve is provided at the output end of the liquid spraying chamber;

[0054] A driving impeller is rotationally connected to the liquid spraying chamber through a transmission shaft, and a sprocket assembly is provided between the transmission shaft and the rotating shaft;

[0055] Wherein, the air extraction nozzle is located in the air flow chamber, and the air flow chamber is communicated with the air source assembly through an air port provided on the liquid spraying body. The liquid spraying chamber is communicated with the liquid outlet nozzle through a first liquid pipe.

[0056] Preferably: A support seat for placing the valve body is provided on the installation table between the air nozzle structures, and a liquid spraying port is provided on the support seat. A reduced diameter structure in the shape of a frustum of a cone is formed at one end of the clamping body. When the valve body is clamped by the clamping body, the reduced diameter structure enters from both ends of the valve body and simultaneously guides the valve body to contact the adsorption port at the end of the clamping body and separates the valve body from the support seat;

[0057] An inlet liquid structure is further provided on the installation table. The inlet liquid structure includes:

[0058] A clamping joint is telescopically movable in a telescopic groove forming the installation table through a compression spring, and has an inlet liquid chamber communicated with the liquid spraying port through a second liquid pipe;

[0059] The limiting part is arranged around the card joint in the circumferential direction and contacts the mounting platform when the card joint descends;

[0060] Wherein, a clamping groove adapted to the clamping joint is formed on the spray body, and a one-way valve connected to the spray chamber is installed on the groove body of the clamping groove.

[0061] In addition, the present invention also provides a valve sealing detection method, which uses the above-mentioned valve sealing detection machine and is characterized in that it includes the following steps:

[0062] S1: When the first driving mechanism is activated, each mounting platform is alternately controlled to sink into the detection pool or float out of the detection pool;

[0063] S2 Valve Installation: When the mounting seat floats to the pool mouth of the detection pool, place the valve body on the support seat;

[0064] S3 fixation: the second driving mechanism controls the air nozzle structures to approach each other, fixes the valve body through the clamping body of the air nozzle structure, and forms an isolation cavity disconnected from the inflation branch and the exhaust branch in the valve body;

[0065] S4 air extraction test: after step S3 is completed, the first driving mechanism controls the mounting platform to sink into the test pool, at least one electromagnet of the air nozzle structure is energized, the air extraction branch is opened, and the air extraction source performs air extraction test on the valve body through the air extraction nozzle and the air extraction branch;

[0066] S5 inflation detection: After step S3 or step S4 is completed, the electromagnet of the air nozzle structure is powered off, the air supply branch is opened, and the air exhaust branch is closed at the same time. The air supply source performs inflation detection on the valve body through the air inlet nozzle and the air supply branch.

[0067] Preferably, in step S4, when the air extraction branch at one end of the valve body is opened and the air charging branch at the other end of the valve body is opened, the air extraction source and the air supply source can use the air extraction branch and the air charging branch at both ends of the valve body to clean the valve body, and the gas entering the valve body from the air charging branch is guided by the movable tube to flow around the valve cavity of the valve body and then discharged from the air extraction branch, thereby completing the cleaning of the valve cavity;

[0068] In step S5, the air extraction branch is closed, and the air extraction source adsorbs and fixes the valve body from both ends of the valve body through the air extraction nozzle, the adsorption cavity and the adsorption port.

[0069] The air extraction test in step S4 of the present invention is located before the air filling test in step S5 because, after the air extraction test, negative pressure is formed inside the valve body. During the air filling test in step S5, the negative pressure state formed in the valve body can facilitate the air supply pump to fill the valve body with air, so that the inflation can be completed faster.

[0070] The present invention has at least the following beneficial effects:

[0071] 1. The present invention can improve the detection accuracy of the valve through inflation detection (inflating the valve cavity and judging by observing whether there are bubbles in the detection pool) and air extraction detection (extracting air from the valve cavity and judging by observing whether water enters the air flow cavity).

[0072] 2. When the present invention performs air extraction detection and inflation detection on the valve body, an isolation cavity is formed in the valve cavity by using the movable pipe (the limiting end of the air nozzle structure of the present invention). The isolation cavity reduces the regional space (or volume) of the valve cavity being inflated or air extracted, enabling rapid completion of inflation and air extraction, thereby improving the detection efficiency.

[0073] 3. The present invention uses the air nozzle structure to fix both ends of the valve, reducing the clamping on the outer circumferential wall of the valve. Therefore, the outer wall of the valve body is more fully exposed in the detection pool (or in contact with the water in the detection pool), thus ensuring the detection result;

[0074] 3.1 In order to ensure the convenience of feeding, when the present invention performs detection, the valve body can be directly placed on the support seat. When the air nozzle structure fixes both ends of the valve body, the valve body will separate from the support seat under the guidance of the clamping body necking structure, thus ensuring the detection result.

[0075] 4. The present invention takes into account the coherence of detection and feeding of the valve body to be detected. Two installation platforms can be set on both sides of the detection pool through the first driving structure. One installation platform sinks for detection, while the other installation platform floats for feeding, thus ensuring the coherence of detection.

[0076] 5. When the present invention detects the valve body, it can also clean the valve cavity of the valve body to avoid impurities in the valve cavity affecting the detection of the valve cavity. At the same time, the detection of the valve cavity of the present invention is also completed through the air nozzle structure. Therefore, the function of the air nozzle structure of the present invention is more comprehensive and there is no need to add a cleaning mechanism.

[0077] 6. In order to ensure the water quality in the detection pool, the present invention is provided with a water circulation component on the machine body. The water circulation component can filter and discharge the particulate impurities in the detection pool during the detection process of the valve body, that is, during the operation of the first driving mechanism, thereby ensuring the water quality in the detection pool and making it more convenient to observe the detection result;

[0078] 6.1 Moreover, when the valve body leaves the detection pool, in order to avoid residual impurities on the surface of the valve body, the air nozzle structure of the present invention can also clean the outer wall of the valve body and drive the valve body to rotate during the cleaning process, thereby improving the cleaning effect.

[0079] In addition, other advantages of the present invention will be demonstrated in the embodiment part of the present invention, making the beneficial effects of the present invention more significant. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0081] Figure 1 Structural schematic diagram of Specific Embodiment 1 of the present invention;

[0082] Figure 2 Structural schematic diagram of the second driving structure in Specific Embodiment 1 of the present invention;

[0083] Figure 3 For Figure 2 A - A cross-sectional view in

[0084] Figure 4 Schematic diagram of the air nozzle structure in Specific Embodiment 2 of the present invention;

[0085] Figure 5 For Figure 4 Another state schematic diagram of

[0086] Figure 6 For Figure 5 Enlarged view of part A in

[0087] Figure 7 For Figure 5 B - B cross-sectional view in

[0088] Figure 8 Structural schematic diagram of Specific Embodiment 3 of the present invention;

[0089] Figure 9 For Figure 8 Enlarged view of part C in

[0090] Figure 10 For Figure 8 Enlarged view of part D in

[0091] Figure 11 For Figure 10 D - D cross-sectional view in

[0092] Figure 12 Top view of the mounting table in Specific Embodiment 3 of the present invention;

[0093] Figure 13 For Figure 12 E - E cross-sectional view in Specific embodiments

[0094] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0095] Embodiment 1

[0096] As Figures 1-3 shown, the present invention discloses a valve sealing detection machine, including:

[0097] A body 10 having a detection pool 100;

[0098] An inflation mechanism provided on the body 10 and composed of a nozzle structure 20 and a gas source assembly

[0099] An observation window 21 provided on the body 10. In this embodiment: a first driving mechanism and a second driving mechanism are further provided on the body 10;

[0100] Wherein, the nozzle structure 20 is provided on the second driving mechanism and can be controlled by the second driving mechanism to approach or move away from each other and fix the valve body from both ends of the valve port of the valve body;

[0101] The second driving mechanism is provided on the first driving mechanism and can be controlled by the first driving mechanism to lift up and enter or leave the detection pool 100;

[0102] The gas source assembly is composed of an air extraction source (air extraction pump) and a gas supply source (gas supply pump), and can extract or inflate the valve body through the nozzle structure 20.

[0103] In this embodiment: the first driving mechanism includes:

[0104] A plurality of first sprockets 11 rotatably connected to one side of the inner wall of the body 10 and circumferentially equidistantly spaced;

[0105] A plurality of second sprockets 12 rotatably connected to the other side of the inner wall of the body 10 and circumferentially equidistantly spaced;

[0106] A transmission chain composed of a first chain 131 drivingly connected between the first sprockets 11 and a second chain 132 drivingly connected between the second sprockets 12;

[0107] Among them, any first sprocket 11 and / or second sprocket 12 can be controlled by a motor to rotate clockwise or counterclockwise, and part of the first sprockets 11 and part of the second sprockets 12 can be mounted on the machine body 10 by means of brackets 14, and part of the first sprockets 11 and part of the second sprockets 12 are located inside the detection pool 100 (at a position close to the bottom of the detection pool 100).

[0108] In this embodiment: The second driving mechanism includes:

[0109] An installation table 30, which is arranged between the first chain 131 and the second chain 132. There are two installation tables 30 in this embodiment, and they are located on both sides of the machine body (side a and side b);

[0110] A chute 31, which is arranged on the installation table 30 and longitudinally penetrates the installation table 30;

[0111] A driving gear 32, which is rotatably connected to the installation table 30;

[0112] A driving rack, which is composed of a first rack 331 and a second rack 332 that are slidably connected to the installation table 30 and meshed with the driving gear 32;

[0113] A sliding seat 34, which is slidably connected to the installation table 30 and is connected to the first rack 331 or the second rack 332 through a limiting block that moves in the chute 31. There are two sliding seats 34 in this embodiment, and they are respectively connected to the first rack 331 or the second rack 332 through the limiting blocks that slide in the chute 31.

[0114] In this embodiment, a cylinder 35 for controlling the movement of the second rack 332 is further provided at the bottom of the installation table 30.

[0115] In this embodiment, the air nozzle structure 20 is that an air extraction nozzle 34a and an air supply nozzle 34b are provided on the sliding seat 34. The air extraction nozzle 34a is controlled by an air extraction pump to extract air, and the air supply nozzle 34b is controlled by an air supply pump to supply air.

[0116] Reference Figures 1-3 , the principle of this embodiment is: During detection, the valve body is placed on the installation table, and the two sliding seats are controlled to approach each other by the cylinder 35, and the valve body is clamped and both ends of the valve body are closed. At this time, the air supply nozzle and the air extraction nozzle are located on both sides of the valve cavity. After the first driving mechanism controls the installation seat to descend and enter the detection pool, the air supply pump and the air extraction pump are respectively used to supply air and extract air to the valve body, so as to complete the air supply detection and air extraction detection of the valve body; and, in this embodiment, the two ends of the valve body are fixed by the sliding seats, so that the outer wall of the valve body is exposed in the detection pool to ensure the detection effect.

[0117] It is worth mentioning that: during the detection of this embodiment, the valve body can be placed on the a side and the b side of the machine body. That is, when the mounting table on the a side rises, the mounting table on the b side descends into the detection pool, and vice versa. Therefore, feeding and detection can be carried out simultaneously to meet the current requirements for detection efficiency.

[0118] Embodiment 2, the difference from Embodiment 1 is that

[0119] As Figures 4-7 shown, the nozzle structure 20 of this embodiment has a limiting end. When the nozzle structure 20 fixes the valve body at both ends, the limiting end can form an isolation cavity 45b that cuts off the gas source assembly in the valve cavity.

[0120] In this embodiment, there are at least two nozzle structures on each mounting table 30. Each nozzle structure includes:

[0121] A clamping body 40, installed on one side of the sliding seat 34, and a sealing gasket can be arranged on one side to improve the sealing effect of the cooperation with the valve body;

[0122] An installation cavity, recessed from the end of the clamping body 40 away from the sliding seat 34;

[0123] A pressing body 41, fixed in the installation cavity, and having an air inlet nozzle 41a and an air extraction nozzle 41b;

[0124] An adsorption cavity 42, formed on the clamping body 40, and communicating with the air extraction nozzle 41b, and an adsorption port 42a communicating with the adsorption cavity 42 is formed at one end of the clamping body 40. An annular cavity 42b that communicates between the adsorption port 42a and the adsorption cavity 42 and extends circumferentially is formed on the clamping body 40;

[0125] A limiting cavity 43, recessed on the pressing body 41, and communicating with the air extraction nozzle 41b;

[0126] A movable cavity, arranged on the pressing body 41, and both ends penetrate through the pressing body 41 and communicate with the air inlet nozzle 41a;

[0127] A folding body 44, having a folding cavity 440, and connected to the limiting cavity 43 through a limiting tube 441;

[0128] A movable tube 45, connected to the cavity wall of the folding cavity 440, passing through the movable cavity, and having a communication port 450 that can communicate with the folding cavity 440 or the air inlet nozzle 41a;

[0129] A spring 46, installed between the folding body 44 and the cavity wall of the installation cavity;

[0130] An electromagnet 47, arranged on the clamping body 40, and attracting the folding body 44 to gradually unfold towards the electromagnet 47 when powered on. When the electromagnet 47 is powered off, the folding body 44 is driven by the spring 46 to contract;

[0131] Among them, when the folding body 44 is unfolded, the valve body is communicated with the air extraction nozzle 41b through an air extraction branch formed by the movable pipe 45, the communication port 450, the folding cavity 440, the limiting pipe 441 and the limiting cavity 43;

[0132] When the folding body 44 contracts, the valve body is communicated with the air inlet nozzle 41a through an air supply branch formed by the movable pipe 45 and the communication port 450;

[0133] The cross-section of the movable pipe 45 is semi-circular (or semi-circular), and air outlet holes 45a are formed on the outer wall, forming the limiting end of the air nozzle structure. When the movable pipes 45 on the air nozzle structures at both ends of the valve body cooperate, a cylindrical isolation body can be formed in the valve cavity, and the isolation cavity is the cavity formed by the isolation body, so as to reduce the space in the valve cavity to be inflated or evacuated, enabling rapid air extraction and inflation.

[0134] In this embodiment, a limiting groove 41c adapted to the end of the movable pipe 45 is further provided on the pressing body 41.

[0135] In this embodiment, a sealing ring 41d is provided on the outer wall of the pressing body 41.

[0136] Reference Figures 4-7 , in order to improve the detection efficiency in this embodiment, an air nozzle structure is provided on the sliding seat. The air nozzle structure in this embodiment can form an isolation cavity inside the valve cavity. More specifically:

[0137] As Figure 4 shown (for the separated state of the sliding seat, in this state, the valve body can be loaded and unloaded), the valve body can be directly sleeved on the movable pipe, and under the control of the second driving mechanism, the sliding seats approach each other and clamp both ends of the valve body through both ends of the clamping body (as Figure 5 described, for the state of clamping or fixing the valve body when the sliding seats approach);

[0138] When the valve body is fixed by the clamping body, the adsorption port on the clamping body contacts the side wall of one end of the valve body. When the air extraction pump is started, the two ends of the valve body can be adsorbed by using the adsorption cavity and the annular cavity, thereby improving the fixing effect;

[0139] Moreover, in this embodiment, when the electromagnet of the clamping body on the sliding seat on one side (such as the left side) is energized, it attracts the folding body to unfold, and makes the movable pipe move close to the electromagnet, so that the communication port on the movable pipe is communicated with the folding cavity. At this time, the air extraction nozzle of the energized air nozzle structure (left side) is communicated with the inside of the valve cavity 45c, and the air supply nozzle of the de-energized air nozzle structure (right side) is communicated with the valve cavity. When the air supply pump and the air extraction pump supply air and extract air to the two air nozzle structures respectively, the inner wall of the valve cavity is cleaned to avoid impurities affecting the detection result. Due to the shape of the movable pipe and the air outlet holes formed on its outer wall, when cleaning the valve body (referenceFigure 7 ), after the gas ejected from the air jet holes on one of the movable pipes (left side) can flow around the valve cavity from top to bottom, it is drawn out from the air jet holes on the other movable pipe (right side). Similarly, when the electromagnet of the nozzle structure on the right side is energized and the electromagnet of the nozzle structure on the left side is de-energized, the gas ejected from the air jet holes on the movable pipe flows into the valve cavity from bottom to top and is drawn out from the air jet holes on the other movable pipe. And in this embodiment, the cleaning effect on the valve cavity can be improved through two modes.

[0140] In the air extraction detection of this embodiment, the electromagnets of the nozzle structures at both ends of the valve cavity are energized, and the air extraction branch is opened and the air filling branch is closed, so as to complete the air extraction detection of the valve cavity.

[0141] In the air filling detection of this embodiment, the electromagnets of the nozzle structures at both ends of the valve cavity are de-energized, and the air filling branch is opened and the air extraction branch is closed, so as to complete the air filling detection of the valve cavity.

[0142] It should be noted that: since an isolation cavity (this cavity will not be affected by air extraction and air filling) is formed in the valve cavity in this embodiment, the air filling and air extraction of the valve cavity can be completed quickly. And compared with Embodiment 1, in this embodiment, the same nozzle structure can complete both the air extraction work and the air filling work, so as to improve the detection efficiency of the valve.

[0143] Embodiment 3, the difference from Embodiment 2 is that:

[0144] As Figures 8-13 shown, in this embodiment: it further includes a water circulation component arranged on the machine body 10 and capable of being controlled by the first driving mechanism. Among them, the water circulation component includes:

[0145] A filter body 50, installed in the detection pool 100 and having a filter cavity;

[0146] A suction body 51, moving in the filter cavity and dividing the filter cavity into a first cavity and a second cavity;

[0147] A filter screen, composed of a first filter screen 521 arranged in the first cavity and a second filter screen 522 arranged in the second cavity. The first filter screen 521 and the second filter screen 522 divide the first cavity and the second cavity into an outer cavity 52a and an inner cavity 52b respectively;

[0148] A liquid inlet nozzle 53, arranged on the filter body 50 and communicating with the outer cavity 52a;

[0149] A liquid outlet nozzle 54, arranged on the filter body 50 and communicating with the inner cavity 52b;

[0150] Wherein, piston shafts 55 extend from both sides of the suction body 51 respectively, and a drive plate 56 connected to each piston shaft 55 is provided between the first chain 131 and the second chain 132;

[0151] A liquid discharging body 58 which is communicated with the liquid outlet nozzle 54 through a liquid discharging pipe 57 and is located at the top of the detection pool 100 is further installed between the first chain 131 and the second chain 132, and a plurality of liquid discharging ports 580 are provided on the liquid discharging body 58.

[0152] In this embodiment, both the liquid inlet nozzle 53 and the liquid outlet nozzle 54 are one-way valves.

[0153] In this embodiment: A sewage discharge pipe 60 communicated with the outer cavity 52a is provided on the machine body 10, and a sewage discharge valve 61 is provided on the sewage discharge pipe 60.

[0154] In this embodiment: The clamping body 40 is rotatably installed on the sliding seat 34 through a rotating shaft 70, and a liquid spraying structure capable of driving the clamping body 40 to rotate is further provided on the sliding seat 34. Among them, the liquid spraying structure includes:

[0155] A liquid spraying body 71, which is connected to the sliding seat 34 through a support shaft 72;

[0156] A liquid spraying cavity 73 and an air flow cavity 74, which are formed in the liquid spraying body 71 at intervals, and a one-way valve 73a is provided at the output end of the liquid spraying cavity 73, and a one-way valve 73a is also provided at the input end of the liquid spraying cavity 73;

[0157] A driving impeller 75, which is rotatably connected to the liquid spraying cavity 73 through a transmission shaft 76, and a sprocket assembly 78 (the sprocket assembly 78 includes sprockets provided on the transmission shaft 76 and the rotating shaft 70 and a chain drivingly connected between the sprockets) is provided between the transmission shaft 76 and the rotating shaft 70. In other embodiments, a pulley assembly can also be used for transmission between the driving impeller 75 and the rotating shaft 70;

[0158] Among them, the air extraction nozzle 41b is located in the air flow cavity 74, and the air flow cavity 74 is communicated with the air extraction pump of the air source assembly through an air port 79 provided on the liquid spraying body 71, and the liquid spraying cavity 73 is communicated with the liquid outlet nozzle 54 through a first liquid pipe 79a.

[0159] In this embodiment: A support seat 80 for placing the valve body is provided on the mounting table 30 and is located between the air nozzle structures 20, and a liquid spraying port 81 is provided on the support seat 80. One end of the clamping body 40 forms a reduced diameter structure 40a in the shape of a frustum of a cone. When the valve body is clamped by the clamping body 40, the reduced diameter structure 40a enters from both ends of the valve body at the same time and guides the valve body to contact the adsorption port 42a at the end of the clamping body 40 and separates the valve body from the support seat 80;

[0160] The mounting table 30 is further provided with a liquid inlet structure 9, and the liquid inlet structure includes:

[0161] A clamping joint 90, which is telescopically movable in a telescopic groove 92 forming the mounting table 30 through a compression spring 91, and has a liquid inlet cavity 94 communicated with a liquid spraying port 81 through a second liquid pipe 93;

[0162] A limiting portion 95, which is circumferentially arranged around the clamping joint 90 and contacts the mounting table 30 when the clamping joint 90 descends;

[0163] Wherein, a clamping groove 96 adapted to the clamping joint 90 is formed on the liquid spraying body 71, and a one-way valve 73a communicated with a liquid spraying cavity 73 is installed in the groove body of the clamping groove 96.

[0164] In other embodiments, if there is no need for the clamping joint to limit the liquid spraying body, the liquid spraying cavity 73 and the liquid spraying port 81 can also be directly connected through the second liquid pipe 93.

[0165] Reference Figures 8-13 , the principle of this embodiment is:

[0166] 1. Purification principle of the detection pool: In order to reduce the particulate impurities in the detection pool and facilitate observing the detection status of the valve body in this embodiment, a water circulation component is arranged at the bottom of the detection pool. When the first driving mechanism operates, the driving plate reciprocates between the sprockets in the detection pool, and the piston shaft is used to control the reciprocating movement of the suction body in the filter cavity. Due to the arrangement of the liquid inlet nozzle and the liquid outlet nozzle provided with one-way valves, when the suction body moves, the water in the detection pool can be pumped into the outer cavity, and after being filtered by the filter screen, it is discharged from the liquid outlet nozzle, thereby filtering the impurities in the detection pool, and the impurities in the outer cavity can be discharged by regularly opening the sewage discharge valve, so as to ensure the water quality in the detection pool;

[0167] The water discharged from the inner cavity is respectively sent into the liquid discharging body or the liquid spraying cavity through a liquid discharging pipe or a liquid pipe. The liquid discharging body returns the filtered water back to the detection pool, and the water flow entering the liquid spraying cavity can drive the air nozzle structure to rotate.

[0168] 2. Reference Figures 10-11 , when the water in the water circulation component is sent into the liquid spraying cavity, the water passes through the driving impeller and causes the driving impeller to rotate. Finally, the sprocket assembly is used to control the rotation of the rotating shaft, so that the air nozzle structure rotates. When the air nozzle structure fixes the valve body, the valve body can be controlled to rotate by using the air nozzle structure;

[0169] 2.1 Based on the rotation of the valve body, in this embodiment, the valve body can be controlled to rotate during detection, so as to improve the detection effect;

[0170] 2.2 Reference Figures 12-13, based on the rotation of the valve body, the present embodiment can clean the outer wall of the valve body after the detection is completed, that is: when the water circulation component is started and when the slide seat moves, the liquid spray structure also moves therewith until the clamping groove (formed at the output end of the liquid spray chamber) on the liquid spray structure moves and adapts to the clamping joint on the mounting platform. The clamping joint can not only play a limiting role on the liquid spray structure, but the liquid inlet chamber on the clamping joint can also cooperate with the liquid spray chamber to receive water discharged from the liquid spray chamber, and send it to the liquid spray port of the support seat through the liquid pipe, and spray it out from the liquid spray port to clean the valve body. That is to say, when the mounting platform rises and separates from the detection liquid in the detection pool, the water flowing through the liquid spray chamber drives the air nozzle structure to rotate by driving the impeller and sprocket structure, and drives the valve body to rotate. Subsequently, the water is sent from the liquid inlet chamber and the liquid pipe of the clamping joint to the liquid spray port, and the valve body in the rotating state is cleaned by spraying liquid from the liquid spray port from bottom to top.

[0171] It is worth mentioning that when the clamping joint cooperates with the spray liquid, the limiting part (the limiting part is annular in shape and can be provided with a sealing gasket) can contact with the spray liquid. At the same time, the spray liquid can press the limiting part on the mounting table to improve the sealing.

[0172] 2.3 Based on the rotation of the air nozzle structure, in the process that the air nozzle structure enters the valve cavity from both ends of the valve body, the air nozzle structure is controlled to rotate, and the valve cavity can be cleaned in cooperation with the vacuum pump and the air supply pump. That is to say, before the air nozzle structure clamps the valve body, the air nozzle structure rotates, so that the gas ejected from the air outlet on the movable tube can be swept inside the valve cavity. At the same time, when impurities are discharged from the valve port, they can be extracted through the adsorption port.

[0173] The specific process is: the first driving mechanism controls the lifting of the mounting platform and makes the lifting platform not contact with the detection liquid. At this time, the second driving mechanism can be used to control the air nozzle structure to approach or move away from the valve body and clean the valve cavity of the valve body.

[0174] 3. An observation window (for observing the airflow cavity) may be provided on the spray liquid of the present embodiment. Therefore, during the vacuum test of the present embodiment, if the result cannot be accurately observed from the detection pool, the vacuum test result may be judged by observing whether there is water accumulation in the airflow cavity. That is, if there is a crack in the valve body, during the vacuum test, the water in the detection pool will enter the valve cavity and will be drawn out by the vacuum branch and enter the airflow cavity. The test may also be judged by observing the condition of the inner wall of the valve cavity after unloading.

[0175] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve sealing tester, comprising: The body (10) has a detection pool (100); The inflation mechanism is arranged on the machine body (10) and is composed of an air nozzle structure (20) and an air source component, and is characterized in that it also includes a first driving mechanism and a second driving mechanism arranged on the machine body (10); Wherein, the air nozzle structure (20) is arranged on the second driving mechanism, and can be controlled by the second driving mechanism to move closer to or farther from each other, and fix the valve body from the valve ports at both ends of the valve body; The second driving mechanism is arranged on the first driving mechanism and can be controlled by the first driving mechanism to rise and fall into or leave the detection pool (100); The air source assembly is composed of an air extraction source and an air supply source, and is capable of extracting air from or inflating the valve body through the air nozzle structure (20); The air nozzle structure (20) has a limiting end, and when the air nozzle structure (20) fixes the valve body at both ends, the limiting end can form an isolation cavity (45b) in the valve cavity that is cut off from the air source component; Each mounting platform (30) has at least two air nozzle structures (20), and each air nozzle structure (20) comprises: A clamping body (40) mounted on one side of a slide seat (34) of the second driving mechanism; A mounting cavity, recessed from one end of the clamping body (40); A pressing body (41) is fixed in the installation cavity and has an air inlet nozzle (41a) and an air exhaust nozzle (41b); An adsorption chamber (42) is formed on the clamping body (40) and is in communication with the suction nozzle (41b); and an adsorption port (42a) in communication with the adsorption chamber (42) is formed at one end of the clamping body (40); A limiting cavity (43) is formed concavely on the pressing body (41) and is communicated with the air suction nozzle (41b); The movable cavity is provided on the pressing body (41), and both ends of the movable cavity penetrate the pressing body (41) and are connected to the air inlet nozzle (41a); A folding body (44) having a folding cavity (440) and connected to the limiting cavity (43) via a limiting tube (441); A movable tube (45), connected to the cavity wall of the folding cavity (440), passing through the movable cavity, and having a communication port (450) capable of communicating with the folding cavity (440) or the air inlet nozzle (41a); A spring (46) is installed between the folding body (44) and the cavity wall of the installation cavity; An electromagnet (47) is disposed on the clamping body (40) and attracts the folding body (44) to gradually unfold toward the electromagnet (47) when power is supplied; When the folding body (44) is unfolded, the valve body is connected to the air extraction nozzle (41b) through an air extraction branch formed by the movable tube (45), the connecting port (450), the folding cavity (440), the position limiting tube (441) and the position limiting cavity (43); When the folded body (44) contracts, the valve body communicates with the air inlet nozzle (41a) through the air supply branch formed by the movable tube (45) and the communication port (450); The cross-section of the movable tube (45) is semicircular and the outer wall is formed with an air outlet hole (45a). The movable tube (45) forms the limiting end of the air nozzle structure.

2. A valve sealing tester according to claim 1, characterized in that: The first driving mechanism comprises: A plurality of first sprockets (11) are rotatably connected to one side of the inner wall of the machine body (10) and are equidistantly spaced in the circumferential direction; A plurality of second sprockets (12) are rotatably connected to the other side of the inner wall of the machine body (10) and are equidistantly spaced in the circumferential direction; A transmission chain, comprising a first chain (131) transmission-connected between the first sprocket wheels (11) and a second chain (132) transmission-connected between the second sprocket wheels (12); Wherein, any of the first sprocket (11) and / or the second sprocket (12) can be controlled by the motor to rotate clockwise or counterclockwise.

3. A valve sealing tester according to claim 2, characterized in that: The second driving mechanism comprises: A mounting platform (30) is disposed between the first chain (131) and the second chain (132); A slide groove (31) is provided on the mounting platform (30) and vertically penetrates the mounting platform (30); A driving gear (32) rotatably connected to the mounting platform (30); A driving rack, comprising a first rack (331) and a second rack (332) which are slidably connected to the mounting platform (30) and mesh with the driving gear (32); The sliding seat (34) is slidably connected to the mounting platform (30) and is connected to the first rack (331) or the second rack (332) via a limit block movable in the sliding groove.

4. A valve sealing tester according to claim 3, characterized in that: It also includes a water circulation component which is arranged on the machine body (10) and can be controlled by the first driving mechanism, wherein the water circulation component includes: A filter body (50) is installed in the detection pool (100) and has a filter cavity; A suction body (51) moves in the filter chamber and divides the filter chamber into a first chamber and a second chamber; A filter screen, comprising a first filter screen (521) arranged in the first cavity and a second filter screen (522) arranged in the second cavity, wherein the first filter screen (521) and the second filter screen (522) respectively divide the first cavity and the second cavity into an outer cavity (52a) and an inner cavity (52b); A liquid inlet nozzle (53) is provided on the filter body (50) and is in communication with the outer cavity (52a); A liquid outlet nozzle (54) is provided on the filter body (50) and is in communication with the inner cavity (52b); Wherein, piston shafts (55) are respectively extended on both sides of the suction body (51), and a driving plate (56) connected to each piston shaft (55) is provided between the first chain (131) and the second chain (132); A drainage body (58) is also installed between the first chain (131) and the second chain (132), which is connected to the liquid outlet nozzle (54) through a liquid drainage pipe (57) and is located at the top of the detection tank (100), and a plurality of liquid drainage ports (580) are provided on the drainage body (58).

5. A valve sealing tester according to claim 4, characterized in that: The machine body (10) is provided with a sewage discharge pipe (60) which is in communication with the outer cavity (52a), and a sewage discharge valve (61) is provided on the sewage discharge pipe (60).

6. A valve sealing tester according to claim 4 or 5, characterized in that: The clamping body (40) is rotatably mounted on the slide seat (34) via a rotating shaft (70), and further comprises a liquid spraying structure disposed on the slide seat (34) and capable of driving the clamping body (40) to rotate, wherein the liquid spraying structure comprises: A spray liquid (71) is connected to the slide seat (34) via a support shaft (72); A liquid spraying chamber (73) and an air flow chamber (74) are formed in a spaced manner in the liquid spraying body (71), and a one-way valve (73a) is provided at the output end of the liquid spraying chamber (73); A driving impeller (75) is rotatably connected to the liquid spray chamber (73) via a transmission shaft (76), and a sprocket assembly is provided between the transmission shaft (76) and the rotating shaft (70); The air suction nozzle (41b) is located in the air flow chamber (74), and the air flow chamber (74) is connected to the air source component via an air port (79) provided on the spray body (71), and the spray liquid chamber (73) is connected to the liquid outlet nozzle (54) via a first liquid pipe (79a).

7. A valve sealing tester according to claim 6, characterized in that: The mounting platform (30) is provided with a support seat (80) located between the air nozzle structure (20) and for placing the valve body, and the support seat (80) is provided with a liquid spraying port (81), and one end of the clamping body (40) is formed with a conical-shaped ... The mounting platform (30) is also provided with a liquid inlet structure (9), and the liquid inlet structure (9) comprises: A clamping joint (90) is telescopically movable in a telescopic groove (92) forming a mounting platform (30) through a compression spring (91), and has a liquid inlet cavity (94) connected to the liquid spraying port (81) through a second liquid pipe (93); A limiting portion (95) is arranged circumferentially around the clamping joint (90) and contacts the mounting platform (30) when the clamping joint (90) descends; A clamping groove (96) adapted to the clamping joint (90) is formed on the spray body (71), and a one-way valve (73a) connected to the spray chamber (73) is installed on the groove body of the clamping groove (96).

8. A method for detecting valve sealing, using a valve sealing detection machine as claimed in claim 7, characterized in that: Including steps such as: S1: When the first driving mechanism is activated, each mounting platform is alternately controlled to sink into the detection pool or float out of the detection pool; S2 Valve Installation: When the valve floats to the pool mouth of the test pool on the installation platform, place the valve body on the support seat; S3 fixation: the second driving mechanism controls the air nozzle structures to approach each other, and fixes the valve body through the clamping body of the air nozzle structure and forms an isolation cavity disconnected from the inflation branch and the exhaust branch in the valve body; S4 air extraction test: after step S3 is completed, the first driving mechanism controls the mounting platform to sink into the test pool, at least one electromagnet of the air nozzle structure is energized, the air extraction branch is opened, and the air extraction source performs air extraction test on the valve body through the air extraction nozzle and the air extraction branch; S5 inflation detection: After step S3 or step S4 is completed, the electromagnet of the air nozzle structure is powered off, the air supply branch is opened, and the air exhaust branch is closed at the same time. The air supply source performs inflation detection on the valve body through the air inlet nozzle and the air supply branch.

9. A valve sealing detection method according to claim 8, characterized in that: In step S4, when the air extraction branch at one end of the valve body is opened and the air charging branch at the other end of the valve body is opened, the air extraction source and the air supply source can use the air extraction branch and the air charging branch at both ends of the valve body to clean the valve body, and the gas entering the valve body from the air charging branch is guided by the movable tube to flow around the valve cavity of the valve body and then discharged from the air extraction branch, thereby completing the cleaning of the valve cavity; In step S5, the air extraction branch is closed, and the air extraction source adsorbs and fixes the valve body from both ends of the valve body through the air extraction nozzle, the adsorption cavity and the adsorption port.

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